/* roulang page: index */
:root {
            --primary: #C85B22;
            --primary-hover: #d96d2f;
            --deep: #10191B;
            --teal: #1D4E52;
            --warm-bg: #F5F4F0;
            --card-bg: #ffffff;
            --ink: #1E2B2C;
            --muted: #6A797D;
            --line: #E5E0D8;
            --line-strong: #CBBFAD;
            --footer-bg: #111B1C;
            --radius-lg: 10px;
            --radius-md: 8px;
            --radius-sm: 5px;
            --shadow-card: 0 6px 24px rgba(20, 30, 30, 0.05);
            --sidebar-w: 270px;
            --content-pad: 5vw;
            --ease: 0.25s ease;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            background: var(--warm-bg);
            color: var(--ink);
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", -apple-system, sans-serif;
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            display: block;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--ease), background var(--ease), border-color var(--ease), transform var(--ease), box-shadow var(--ease);
        }

        a:hover {
            color: inherit;
        }

        button,
        input,
        select,
        textarea {
            font: inherit;
        }

        ul,
        ol {
            margin: 0;
            padding: 0;
            list-style: none;
        }

        .container {
            max-width: 1320px;
            padding-left: var(--content-pad);
            padding-right: var(--content-pad);
        }

        /* ========= 左侧导航 ========= */
        .sidebar {
            background: var(--deep);
            color: #fff;
            width: var(--sidebar-w);
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            z-index: 1000;
            display: flex;
            flex-direction: column;
            padding-left: 28px;
            padding-right: 24px;
            border-right: 1px solid rgba(255, 255, 255, 0.06);
        }

        .sidebar::after {
            content: "";
            position: absolute;
            right: 0;
            top: 0;
            bottom: 0;
            width: 1px;
            background: linear-gradient(to bottom, transparent, rgba(200, 91, 34, 0.4), rgba(29, 78, 82, 0.5), transparent);
        }

        .sidebar-brand {
            height: 90px;
            display: flex;
            align-items: center;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            margin-bottom: 22px;
        }

        .brand-link {
            display: flex;
            flex-direction: column;
            gap: 3px;
        }

        .brand-en {
            font-family: "Barlow Condensed", "Arial Narrow", sans-serif;
            letter-spacing: 0.18em;
            font-size: 11px;
            text-transform: uppercase;
            color: var(--primary);
            font-weight: 600;
        }

        .brand-cn {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.04em;
        }

        .side-nav {
            flex: 1;
            margin-top: 8px;
        }

        .side-nav>ul>li {
            margin-bottom: 6px;
            position: relative;
        }

        .side-nav>ul>li a {
            display: flex;
            align-items: baseline;
            gap: 10px;
            padding: 10px 12px;
            color: rgba(255, 255, 255, 0.58);
            font-size: 15px;
            border-radius: 6px;
            position: relative;
            transition: all var(--ease);
        }

        .side-nav>ul>li a .nav-num {
            font-family: "Barlow Condensed", "Arial Narrow", sans-serif;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.32);
            letter-spacing: 0.06em;
            min-width: 34px;
        }

        .side-nav>ul>li a:hover {
            background: rgba(200, 91, 34, 0.06);
            color: #fff;
            padding-left: 16px;
        }

        .side-nav>ul>li a.current {
            color: #fff;
            padding-left: 14px;
        }

        .side-nav>ul>li a.current::before {
            content: "";
            width: 3px;
            height: 18px;
            background: var(--primary);
            border-radius: 4px;
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
        }

        .side-nav>ul>li a.current .nav-num {
            color: var(--primary);
        }

        .side-info {
            padding: 18px 2px 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 13px;
            line-height: 1.9;
            color: rgba(255, 255, 255, 0.45);
        }

        .side-info strong {
            color: rgba(255, 255, 255, 0.72);
            font-weight: 500;
            display: block;
            margin-bottom: 4px;
        }

        /* ========= 移动顶部 ========= */
        .mobile-topbar {
            display: none;
            height: 60px;
            background: var(--deep);
            color: #fff;
            position: sticky;
            top: 0;
            z-index: 1500;
            align-items: center;
            justify-content: space-between;
            padding: 0 18px;
        }

        .mobile-topbar .mobile-brand {
            font-weight: 700;
            font-size: 18px;
            color: #fff;
            letter-spacing: 0.04em;
        }

        .mobile-topbar .mobile-brand span {
            display: block;
            font-size: 10px;
            font-weight: 500;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 0.16em;
            line-height: 1.2;
        }

        .menu-toggle {
            border: 0;
            background: transparent;
            color: #fff;
            width: 42px;
            height: 42px;
            font-size: 20px;
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .menu-toggle:hover {
            background: rgba(255, 255, 255, 0.08);
        }

        .mobile-drawer {
            position: fixed;
            inset: 0;
            background: var(--deep);
            color: #fff;
            z-index: 2000;
            transform: translateX(100%);
            transition: transform 0.35s ease;
            padding: 20px 24px 30px;
            display: flex;
            flex-direction: column;
            overflow-y: auto;
        }

        .mobile-drawer.active {
            transform: translateX(0);
        }

        .drawer-head {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-bottom: 14px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            margin-bottom: 16px;
        }

        .drawer-head .brand-cn {
            font-size: 20px;
        }

        .drawer-close {
            background: transparent;
            border: 0;
            color: #fff;
            font-size: 24px;
            line-height: 1;
            width: 40px;
            height: 40px;
            border-radius: 6px;
        }

        .drawer-close:hover {
            background: rgba(255, 255, 255, 0.08);
        }

        .drawer-nav li {
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .drawer-nav li a {
            display: flex;
            gap: 10px;
            align-items: center;
            padding: 14px 0;
            font-size: 17px;
            color: rgba(255, 255, 255, 0.74);
        }

        .drawer-nav li a.current {
            color: #fff;
        }

        .drawer-nav li a .nav-num {
            color: var(--primary);
            font-size: 13px;
            min-width: 30px;
        }

        .drawer-bottom {
            margin-top: auto;
            padding-top: 30px;
            color: rgba(255, 255, 255, 0.4);
            font-size: 13px;
        }

        /* ========= 主内容 ========= */
        .main-wrap {
            margin-left: var(--sidebar-w);
            min-height: 100vh;
            background: var(--warm-bg);
            overflow: hidden;
        }

        .content-root {
            overflow: hidden;
        }

        /* Hero */
        .hero-section {
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
            background:
                linear-gradient(110deg, rgba(245, 244, 240, 0.98) 0%, rgba(245, 244, 240, 0.96) 48%, rgba(245, 244, 240, 0.48) 100%),
                url('/assets/images/backpic/back-1.png') right top / cover no-repeat;
            padding: 80px 0;
        }

        .hero-section .container {
            position: relative;
            z-index: 2;
        }

        .hero-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 12px;
            letter-spacing: 0.14em;
            color: var(--teal);
            text-transform: uppercase;
            font-weight: 600;
            margin-bottom: 24px;
            padding: 6px 12px;
            border: 1px solid rgba(29, 78, 82, 0.2);
            border-radius: 40px;
            background: rgba(255, 255, 255, 0.6);
        }

        .hero-section h1 {
            font-size: 58px;
            line-height: 1.16;
            font-weight: 700;
            color: var(--ink);
            margin: 0 0 16px;
            letter-spacing: 0.02em;
        }

        .hero-section h1 span.headline-sub {
            display: block;
            font-size: 30px;
            line-height: 1.35;
            color: var(--teal);
            margin-top: 8px;
            font-weight: 600;
            letter-spacing: 0;
        }

        .hero-lead {
            font-size: 18px;
            color: #445558;
            max-width: 560px;
            line-height: 1.9;
            margin-bottom: 26px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: center;
        }

        .btn-brand {
            background: var(--primary);
            color: #fff;
            border: 0;
            height: 46px;
            font-weight: 500;
            padding: 0 26px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: 5px;
            transition: all var(--ease);
        }

        .btn-brand i {
            font-size: 13px;
            transition: transform var(--ease);
        }

        .btn-brand:hover {
            background: var(--primary-hover);
            color: #fff;
        }

        .btn-brand:hover i {
            transform: translateX(4px);
        }

        .btn-ghost {
            background: transparent;
            border: 1px solid #3a5355;
            color: var(--ink);
            height: 46px;
            padding: 0 24px;
            border-radius: 5px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 500;
            transition: all var(--ease);
        }

        .btn-ghost:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(200, 91, 34, 0.04);
        }

        .btn-white {
            background: #fff;
            color: var(--deep);
            height: 46px;
            border-radius: 5px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 0 22px;
            font-weight: 500;
        }

        .btn-white:hover {
            background: rgba(255, 255, 255, 0.9);
            color: var(--primary);
        }

        .hero-meta {
            margin-top: 34px;
            font-size: 13px;
            color: #98a3a2;
            letter-spacing: 0.04em;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .hero-meta i {
            color: var(--primary);
            font-size: 16px;
        }

        .hero-visual {
            position: relative;
            max-width: 470px;
            margin-left: auto;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 28px 50px rgba(20, 32, 34, 0.12);
        }

        .hero-visual img {
            width: 100%;
            height: 510px;
            object-fit: cover;
        }

        .hero-visual::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(16, 25, 27, 0.72), transparent 60%);
            pointer-events: none;
        }

        .hero-visual .hero-cap {
            position: absolute;
            left: 20px;
            right: 20px;
            bottom: 16px;
            z-index: 2;
            color: #fff;
            font-size: 13px;
            line-height: 1.7;
        }

        .hero-visual .hero-cap strong {
            display: block;
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 2px;
        }

        /* 页面通用块 */
        .page-section {
            padding: 96px 0;
            position: relative;
        }

        .section-head {
            margin-bottom: 44px;
        }

        .section-index {
            display: block;
            font-family: "Barlow Condensed", "Arial Narrow", sans-serif;
            letter-spacing: 0.16em;
            text-transform: uppercase;
            color: var(--primary);
            font-weight: 600;
            font-size: 13px;
            margin-bottom: 8px;
        }

        .section-title {
            font-size: 38px;
            line-height: 1.28;
            font-weight: 700;
            color: var(--ink);
            letter-spacing: 0.02em;
            margin: 0;
        }

        .section-desc {
            color: #506162;
            font-size: 16px;
            line-height: 1.9;
            margin-top: 14px;
        }

        .text-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            font-weight: 500;
            font-size: 14px;
            margin-top: 18px;
        }

        .text-link i {
            transition: transform var(--ease);
            font-size: 13px;
        }

        .text-link:hover {
            color: var(--primary);
        }

        .text-link:hover i {
            transform: translateX(5px);
        }

        /* 服务区 */
        .service-wrap {
            padding-top: 10px;
        }

        .service-list {
            border-top: 1px solid var(--line);
        }

        .service-item {
            display: flex;
            align-items: center;
            gap: 22px;
            padding: 26px 6px;
            border-bottom: 1px solid var(--line);
            transition: background var(--ease), padding-left var(--ease);
        }

        .service-item:hover {
            background: #fff;
            padding-left: 22px;
        }

        .service-no {
            font-family: "Barlow Condensed", "Arial Narrow", sans-serif;
            font-size: 42px;
            font-weight: 600;
            color: rgba(29, 78, 82, 0.18);
            min-width: 76px;
            line-height: 1;
        }

        .service-info {
            flex: 1;
        }

        .service-info h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--ink);
            margin: 0 0 6px;
        }

        .service-info p {
            color: #647578;
            margin: 0;
            font-size: 15px;
            line-height: 1.8;
            max-width: 520px;
        }

        .service-arrow {
            font-size: 18px;
            color: var(--line-strong);
            transition: all var(--ease);
        }

        .service-item:hover .service-arrow {
            color: var(--primary);
            transform: translateX(5px);
        }

        /* 应用场景 */
        .section-scenes {
            background: #fff;
        }

        .scene-image {
            border-radius: 10px;
            overflow: hidden;
            position: relative;
            height: 100%;
            min-height: 460px;
        }

        .scene-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .scene-image::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(16, 25, 27, 0.02), rgba(16, 25, 27, 0.4));
        }

        .scene-list-item {
            display: flex;
            align-items: center;
            gap: 18px;
            padding: 20px 6px;
            border-bottom: 1px solid var(--line);
            transition: all var(--ease);
        }

        .scene-list-item:hover {
            padding-left: 14px;
            border-bottom-color: var(--primary);
        }

        .scene-index {
            font-family: "Barlow Condensed", "Arial Narrow", sans-serif;
            font-size: 15px;
            color: var(--primary);
            font-weight: 600;
            min-width: 32px;
        }

        .scene-body {
            flex: 1;
        }

        .scene-body h3 {
            font-size: 18px;
            font-weight: 600;
            margin: 0 0 4px;
        }

        .scene-body p {
            color: #6c7b7c;
            font-size: 14px;
            line-height: 1.7;
            margin: 0;
        }

        .scene-arrow {
            color: #bbb;
            transition: transform var(--ease), color var(--ease);
        }

        .scene-list-item:hover .scene-arrow {
            color: var(--primary);
            transform: translateX(6px);
        }

        .scene-tag-cloud {
            margin-top: 30px;
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .scene-tag-cloud span {
            background: #f4f0e9;
            border: 1px solid var(--line);
            color: #3b5153;
            font-size: 12px;
            border-radius: 20px;
            padding: 4px 12px;
        }

        /* 案例深色带 */
        .case-band {
            background: var(--deep);
            color: #fff;
            padding: 100px 0;
        }

        .case-band .section-title {
            color: #fff;
        }

        .case-band .section-desc {
            color: rgba(255, 255, 255, 0.68);
        }

        .case-band .section-index {
            color: #e6834b;
        }

        .case-badge {
            font-size: 12px;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: #69aeb2;
            border: 1px solid rgba(105, 174, 178, 0.3);
            padding: 4px 12px;
            border-radius: 40px;
        }

        .case-item {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 10px;
            padding: 30px;
            height: 100%;
            transition: border-color var(--ease), transform var(--ease);
        }

        .case-item:hover {
            border-color: rgba(200, 91, 34, 0.5);
            transform: translateY(-4px);
        }

        .case-item h3 {
            font-size: 22px;
            font-weight: 600;
            margin: 12px 0 10px;
        }

        .case-item .case-summary {
            color: rgba(255, 255, 255, 0.64);
            font-size: 14px;
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .case-metrics {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-top: 18px;
        }

        .case-metric {
            background: rgba(29, 78, 82, 0.55);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 8px;
            padding: 12px 16px 10px;
            min-width: 108px;
        }

        .case-metric .metric-num {
            font-family: "Barlow Condensed", "Arial Narrow", sans-serif;
            font-size: 26px;
            font-weight: 600;
            color: #fff;
            line-height: 1.2;
        }

        .case-metric .metric-label {
            color: rgba(255, 255, 255, 0.52);
            font-size: 12px;
            margin-top: 2px;
        }

        .case-note {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.35);
            margin-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 18px;
        }

        .case-note i {
            color: #689ea2;
            margin-right: 8px;
        }

        /* 价格 / 合作 */
        .pricing-left h3 {
            font-size: 22px;
            font-weight: 600;
            margin: 0 0 24px;
        }

        .pricing-mode {
            border-bottom: 1px solid var(--line);
            padding: 18px 2px;
        }

        .pricing-mode h4 {
            font-size: 17px;
            margin: 0 0 6px;
            font-weight: 600;
        }

        .pricing-mode p {
            margin: 0;
            color: #6e7f80;
            font-size: 14px;
            line-height: 1.8;
        }

        .pricing-table-wrap {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 10px;
            box-shadow: var(--shadow-card);
            padding: 28px 22px;
            overflow-x: auto;
        }

        .pricing-table {
            width: 100%;
            font-size: 14px;
            border-collapse: collapse;
        }

        .pricing-table th {
            font-size: 13px;
            letter-spacing: 0.04em;
            color: var(--teal);
            padding: 10px 8px;
            text-align: left;
            border-bottom: 1px solid var(--line);
            white-space: nowrap;
        }

        .pricing-table td {
            padding: 12px 8px;
            border-bottom: 1px solid #f0ece5;
            color: #48595b;
            vertical-align: top;
        }

        .pricing-table tr:last-child td {
            border-bottom: 0;
        }

        .pricing-table .need {
            color: var(--primary);
            white-space: nowrap;
            font-weight: 500;
        }

        .pricing-table .no-need {
            color: var(--teal);
            white-space: nowrap;
        }

        .pricing-info-line {
            margin-top: 26px;
            background: #eef0ec;
            border: 1px solid #dfddd3;
            border-radius: 10px;
            padding: 14px 18px;
            color: #496061;
            font-size: 14px;
        }

        .pricing-info-line i {
            color: var(--primary);
            margin-right: 8px;
        }

        /* 新闻区块 */
        .news-header {
            display: flex;
            justify-content: space-between;
            align-items: flex-end;
            gap: 20px;
            margin-bottom: 42px;
        }

        .news-more-link {
            color: var(--primary);
            font-size: 14px;
            font-weight: 500;
            white-space: nowrap;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .news-more-link i {
            transition: transform var(--ease);
        }

        .news-more-link:hover {
            color: var(--primary);
        }

        .news-more-link:hover i {
            transform: translateX(4px);
        }

        .news-feature {
            border-radius: 10px;
            background: #fff;
            border: 1px solid var(--line);
            overflow: hidden;
            height: 100%;
            display: flex;
            flex-direction: column;
            transition: transform var(--ease), border-color var(--ease), box-shadow var(--ease);
        }

        .news-feature:hover {
            border-color: rgba(200, 91, 34, 0.4);
            transform: translateY(-4px);
            box-shadow: 0 14px 30px rgba(25, 35, 36, 0.06);
        }

        .news-feature-img {
            overflow: hidden;
            aspect-ratio: 16 / 9;
            background: #dfe4e1;
        }

        .news-feature-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .news-feature:hover .news-feature-img img {
            transform: scale(1.03);
        }

        .news-feature-content {
            padding: 24px;
            padding-bottom: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .news-feature-content h3 {
            font-size: 20px;
            font-weight: 600;
            line-height: 1.55;
            margin: 4px 0 10px;
        }

        .news-feature-content p {
            color: #6a7a7b;
            font-size: 14px;
            line-height: 1.75;
            flex: 1;
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-cat {
            font-size: 12px;
            color: var(--primary);
            background: rgba(200, 91, 34, 0.06);
            border: 1px solid rgba(200, 91, 34, 0.18);
            border-radius: 999px;
            padding: 3px 10px;
            margin-right: 8px;
        }

        .news-date {
            font-size: 13px;
            color: #9aa5a4;
        }

        .read-more {
            margin-top: 8px;
            font-size: 14px;
            color: var(--primary);
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .read-more i {
            transition: transform var(--ease);
        }

        .news-feature:hover .read-more i {
            transform: translateX(4px);
        }

        .news-secondary {
            display: flex;
            flex-direction: column;
            gap: 14px;
            height: 100%;
        }

        .news-mini-item {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 10px;
            padding: 20px 20px 16px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 7px;
            transition: border-color var(--ease), transform var(--ease);
        }

        .news-mini-item:hover {
            border-color: rgba(200, 91, 34, 0.35);
            transform: translateY(-3px);
        }

        .news-mini-item h3 {
            font-size: 16px;
            font-weight: 600;
            line-height: 1.6;
            margin: 0;
            color: var(--ink);
        }

        .news-mini-item p {
            margin: 0;
            color: #83908d;
            font-size: 13px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-mini-item .mini-meta {
            margin-top: 4px;
        }

        .news-empty {
            height: 260px;
            border: 1px dashed #c8c4ba;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #8c9994;
            font-size: 15px;
            background: rgba(255, 255, 255, 0.4);
        }

        /* FAQ */
        .section-faq {
            background: #fff;
        }

        .faq-accordion {
            border-top: 1px solid var(--line);
        }

        .faq-item {
            border-bottom: 1px solid var(--line);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            background: transparent;
            border: 0;
            text-align: left;
            padding: 24px 2px;
            font-size: 17px;
            font-weight: 500;
            color: var(--ink);
            cursor: pointer;
            transition: color var(--ease);
        }

        .faq-question:hover {
            color: var(--primary);
        }

        .faq-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border: 1px solid var(--line-strong);
            border-radius: 50%;
            color: var(--primary);
            flex: 0 0 28px;
            position: relative;
            transition: transform var(--ease), background var(--ease);
        }

        .faq-question[aria-expanded="true"] .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }

        .faq-answer {
            padding: 0 2px 24px;
            color: #5c7071;
            font-size: 15px;
            line-height: 1.9;
            max-width: 860px;
        }

        /* CTA */
        .cta-band {
            padding: 90px 0;
            background: var(--warm-bg);
        }

        .cta-inner {
            background: var(--deep);
            border-radius: 14px;
            padding: 52px 58px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
            position: relative;
            overflow: hidden;
        }

        .cta-inner::before {
            content: "";
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 4px;
            background: var(--primary);
        }

        .cta-inner h2 {
            color: #fff;
            font-size: 30px;
            line-height: 1.4;
            margin: 0 0 8px;
            font-weight: 600;
        }

        .cta-inner p {
            color: rgba(255, 255, 255, 0.6);
            margin: 0;
        }

        .cta-actions {
            display: flex;
            gap: 12px;
        }

        /* ========= 页脚 ========= */
        .site-footer {
            background: var(--footer-bg);
            color: rgba(255, 255, 255, 0.65);
        }

        .footer-top {
            padding: 70px 0 44px;
        }

        .footer-brand .brand-cn {
            color: #fff;
            font-size: 22px;
        }

        .footer-brand .brand-en {
            color: var(--primary);
            font-size: 11px;
            letter-spacing: 0.14em;
            display: block;
            margin-bottom: 4px;
        }

        .footer-brand p {
            color: rgba(255, 255, 255, 0.5);
            font-size: 14px;
            line-height: 1.9;
            margin-top: 16px;
            max-width: 320px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 500;
            margin-bottom: 16px;
        }

        .footer-col ul li {
            margin-bottom: 9px;
        }

        .footer-col ul li a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.5);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            min-height: 30px;
        }

        .footer-col ul li a i {
            font-size: 10px;
            opacity: 0;
            transition: all var(--ease);
            color: var(--primary);
        }

        .footer-col ul li a:hover {
            color: #fff;
        }

        .footer-col ul li a:hover i {
            opacity: 1;
            transform: translateX(4px);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 22px 0;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }

        /* 小工具 */
        .stat-num {
            font-family: "Barlow Condensed", "Arial Narrow", sans-serif;
        }

        @media (max-width: 1199.98px) {
            :root {
                --content-pad: 3.5vw;
            }

            .hero-section h1 {
                font-size: 48px;
            }

            .hero-section h1 span.headline-sub {
                font-size: 24px;
            }

            .hero-visual img {
                height: 440px;
            }

            .cta-inner {
                padding: 44px 34px;
            }
        }

        @media (max-width: 991.98px) {
            .sidebar {
                display: none;
            }

            .mobile-topbar {
                display: flex;
            }

            .main-wrap {
                margin-left: 0;
            }

            .page-section {
                padding: 70px 0;
            }

            .hero-section {
                min-height: 0;
                padding: 60px 0;
                background:
                    linear-gradient(rgba(245, 244, 240, 0.92), rgba(245, 244, 240, 0.98)),
                    url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            }

            .hero-section h1 {
                font-size: 40px;
            }

            .hero-section h1 span.headline-sub {
                font-size: 22px;
            }

            .hero-visual {
                margin: 0;
                max-width: 100%;
            }

            .hero-visual img {
                height: 320px;
            }

            .section-title {
                font-size: 30px;
            }

            .case-band {
                padding: 70px 0;
            }

            .cta-inner {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 575.98px) {
            :root {
                --content-pad: 20px;
            }

            .page-section {
                padding: 56px 0;
            }

            .hero-section {
                padding: 40px 0;
            }

            .hero-section h1 {
                font-size: 34px;
                letter-spacing: 0;
            }

            .hero-section h1 span.headline-sub {
                font-size: 20px;
            }

            .hero-lead {
                font-size: 16px;
            }

            .hero-actions .btn-brand,
            .hero-actions .btn-ghost {
                width: calc(50% - 7px);
            }

            .service-no {
                font-size: 28px;
                min-width: 48px;
            }

            .service-item {
                gap: 10px;
                padding: 20px 4px;
            }

            .service-info h3 {
                font-size: 17px;
            }

            .service-info p {
                font-size: 14px;
            }

            .section-title {
                font-size: 27px;
            }

            .case-item {
                padding: 22px;
            }

            .cta-inner {
                padding: 34px 24px;
            }

            .cta-inner h2 {
                font-size: 25px;
            }

            .cta-actions {
                flex-direction: column;
                width: 100%;
            }

            .cta-actions .btn-brand,
            .cta-actions .btn-white {
                width: 100%;
                justify-content: center;
            }

            .footer-top .row {
                row-gap: 26px;
            }

            .footer-brand p {
                font-size: 13px;
            }

            .case-metrics {
                gap: 10px;
            }

            .case-metric {
                min-width: 92px;
                padding: 10px 12px;
            }

            .case-metric .metric-num {
                font-size: 22px;
            }

            .news-feature-content {
                padding: 18px;
            }

            .news-mini-item {
                padding: 16px;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            * {
                transition: none !important;
                animation: none !important;
            }

            html {
                scroll-behavior: auto;
            }
        }

        .btn-cus-radius {
            border-radius: 4px;
        }

/* roulang page: category1 */
/* ============ root design tokens ============ */
        :root {
            --primary: #C85B22;
            --primary-dark: #B24F1B;
            --primary-soft: rgba(200, 91, 34, 0.08);
            --deep: #10191B;
            --deep-2: #1D4E52;
            --deep-3: #152426;
            --warm-white: #F5F4F0;
            --white: #FFF;
            --text: #1E2B2C;
            --text-light: #5A6B6C;
            --text-soft: #8A9798;
            --border: #E2E4DF;
            --border-light: #EDEFEA;
            --blue-border: #D6DAD4;
            --radius: 8px;
            --radius-sm: 5px;
            --nav-width: 270px;
            --shadow: 0 10px 30px rgba(16, 25, 27, 0.07);
            --shadow-lg: 0 18px 40px rgba(16, 25, 27, 0.1);
            --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", sans-serif;
            --font-en: "DIN Alternate", "Barlow Condensed", "Arial Narrow", sans-serif;
            --space-section: 96px;
        }

        /* ============ reset/base ============ */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            font-family: var(--font-cn);
            font-size: 16px;
            line-height: 1.75;
            background: var(--warm-white);
            color: var(--text);
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: all 0.25s ease;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
        }
        ul,
        ol {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6,
        p,
        figure {
            margin: 0;
        }
        .container {
            max-width: 1320px;
            padding-left: 24px;
            padding-right: 24px;
            margin-left: auto;
            margin-right: auto;
        }
        .row {
            --bs-gutter-x: 24px;
        }

        /* ============ common layout ============ */
        .page-wrapper {
            display: flex;
            min-height: 100vh;
        }
        .side-nav {
            width: var(--nav-width);
            background: var(--deep);
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            z-index: 1050;
            display: flex;
            flex-direction: column;
            transition: transform 0.3s ease;
        }
        .main-content {
            margin-left: var(--nav-width);
            flex: 1;
            min-width: 0;
            display: flex;
            flex-direction: column;
            background: var(--warm-white);
        }
        .content-body {
            flex: 1;
        }

        /* ============ side nav styles ============ */
        .nav-brand {
            height: 90px;
            display: flex;
            align-items: center;
            padding: 0 28px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            gap: 12px;
            flex-shrink: 0;
        }
        .brand-mark {
            width: 42px;
            height: 42px;
            flex-shrink: 0;
            border: 2px solid var(--primary);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(200, 91, 34, 0.1);
            position: relative;
            overflow: hidden;
        }
        .brand-mark::before {
            content: "";
            position: absolute;
            width: 24px;
            height: 2px;
            background: var(--primary);
            transform: rotate(45deg);
            border-radius: 2px;
        }
        .brand-mark::after {
            content: "";
            position: absolute;
            width: 2px;
            height: 24px;
            background: #fff;
            opacity: 0.8;
            transform: rotate(45deg);
            border-radius: 2px;
        }
        .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1;
        }
        .brand-text .brand-en {
            font-family: var(--font-en);
            font-size: 10px;
            letter-spacing: 0.14em;
            color: var(--primary);
            text-transform: uppercase;
            margin-bottom: 6px;
        }
        .brand-text .brand-cn {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.03em;
            white-space: nowrap;
        }
        .nav-menu-wrap {
            flex: 1;
            overflow-y: auto;
            padding: 32px 0 20px;
            scrollbar-width: none;
        }
        .nav-menu-wrap::-webkit-scrollbar {
            display: none;
        }
        .nav-menu {
            display: flex;
            flex-direction: column;
        }
        .nav-menu a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 15px 28px;
            font-size: 15px;
            color: rgba(245, 244, 240, 0.65);
            border-left: 3px solid transparent;
            transition: all 0.25s ease;
            position: relative;
        }
        .nav-menu a .nav-num {
            font-family: var(--font-en);
            font-size: 12px;
            color: rgba(255, 255, 255, 0.3);
            letter-spacing: 0.08em;
            width: 27px;
            transition: color 0.25s;
        }
        .nav-menu a:hover {
            background: rgba(200, 91, 34, 0.06);
            color: #fff;
        }
        .nav-menu a:hover .nav-num {
            color: var(--primary);
        }
        .nav-menu a.current {
            color: #fff;
            border-left-color: var(--primary);
            background: linear-gradient(90deg, rgba(200, 91, 34, 0.12), transparent 60%);
        }
        .nav-menu a.current .nav-num {
            color: var(--primary);
        }
        .nav-footer {
            padding: 24px 28px 26px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            flex-shrink: 0;
        }
        .nav-footer-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 12px;
            color: rgba(245, 244, 240, 0.45);
            margin-bottom: 10px;
            line-height: 1.6;
        }
        .nav-footer-item i {
            color: var(--primary);
            width: 16px;
            font-size: 13px;
            text-align: center;
        }
        .nav-footer-item span {
            font-family: var(--font-en);
            font-size: 13px;
            letter-spacing: 0.02em;
        }
        .nav-footer-item:last-child {
            margin-bottom: 0;
        }

        /* ============ mobile header / drawer ============ */
        .mobile-header {
            display: none;
            height: 60px;
            background: var(--deep);
            position: sticky;
            top: 0;
            z-index: 1040;
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .mobile-brand-link {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #fff;
        }
        .mobile-burger {
            background: transparent;
            border: none;
            padding: 8px 10px;
            display: flex;
            flex-direction: column;
            gap: 6px;
            cursor: pointer;
        }
        .mobile-burger i {
            display: block;
            width: 22px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
        }

        /* drawer overlay */
        .drawer-overlay {
            display: none;
        }

        /* ============ breadcrumb ============ */
        .page-breadcrumb {
            padding: 26px 0 20px;
            font-size: 13px;
            color: var(--text-soft);
            background: transparent;
            border-bottom: 1px solid var(--border);
        }
        .page-breadcrumb .container {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .page-breadcrumb a {
            color: var(--text-light);
        }
        .page-breadcrumb a:hover {
            color: var(--primary);
        }
        .page-breadcrumb i {
            font-size: 12px;
            color: #B7C0C1;
        }
        .page-breadcrumb .current {
            color: var(--text);
            font-weight: 500;
        }

        /* ============ buttons ============ */
        .btn {
            border-radius: var(--radius-sm);
            font-size: 15px;
            padding: 12px 26px;
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            border: 1px solid transparent;
            transition: all 0.3s ease;
            letter-spacing: 0.02em;
        }
        .btn i {
            transition: transform 0.3s ease;
            font-size: 13px;
        }
        .btn:hover i {
            transform: translateX(4px);
        }
        .btn-primary-custom {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary-custom:hover,
        .btn-primary-custom:focus {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(200, 91, 34, 0.22);
        }
        .btn-dark-custom {
            background: var(--deep);
            color: #fff;
            border-color: var(--deep);
        }
        .btn-dark-custom:hover {
            background: #1C2A2E;
            border-color: #1C2A2E;
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-outline-custom {
            background: transparent;
            color: var(--text);
            border-color: rgba(16, 25, 27, 0.35);
        }
        .btn-outline-custom:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(200, 91, 34, 0.04);
            transform: translateY(-2px);
        }
        .btn-outline-white {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.5);
        }
        .btn-outline-white:hover,
        .btn-outline-white:focus {
            background: #fff;
            border-color: #fff;
            color: var(--deep);
            transform: translateY(-2px);
        }
        .btn-white-solid {
            background: #fff;
            color: var(--deep);
            border-color: #fff;
        }
        .btn-white-solid:hover {
            background: rgba(255, 255, 255, 0.88);
            border-color: rgba(255, 255, 255, 0.88);
            color: var(--deep);
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(16, 25, 27, 0.18);
        }
        a.btn {
            text-decoration: none;
        }

        /* ============ hero section ============ */
        .category-hero {
            background: var(--deep);
            position: relative;
            overflow: hidden;
            padding: 110px 0 130px;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(75deg, rgba(16, 25, 27, 0.96) 45%, rgba(16, 25, 27, 0.75) 70%, rgba(29, 78, 82, 0.45) 100%);
            z-index: 1;
        }
        .category-hero .hero-bg-img {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            z-index: 0;
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
        }
        .hero-eyebrow {
            font-family: var(--font-en);
            font-size: 15px;
            letter-spacing: 0.18em;
            color: var(--primary);
            text-transform: uppercase;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .hero-eyebrow::before {
            content: "";
            width: 30px;
            height: 2px;
            background: var(--primary);
            display: block;
            border-radius: 2px;
        }
        .category-hero h1 {
            font-size: 72px;
            font-weight: 700;
            color: #fff;
            line-height: 1.05;
            margin-bottom: 26px;
            letter-spacing: 0.01em;
            max-width: 660px;
        }
        .category-hero p.hero-desc {
            font-size: 18px;
            line-height: 1.9;
            color: rgba(255, 255, 255, 0.78);
            max-width: 760px;
            margin-bottom: 40px;
            letter-spacing: 0.01em;
        }
        .hero-quote {
            margin-top: 44px;
            display: flex;
            align-items: center;
            gap: 16px;
            border-top: 1px solid rgba(255, 255, 255, 0.2);
            padding-top: 26px;
            color: rgba(255, 255, 255, 0.55);
            font-size: 14px;
            max-width: 740px;
        }
        .hero-quote .circle-dot {
            width: 8px;
            height: 8px;
            background: var(--primary);
            border-radius: 50%;
        }

        /* ============ section base ============ */
        .section-block {
            padding: var(--space-section) 0;
        }
        .section-block.tight {
            padding: 70px 0;
        }
        .section-dark {
            background: #fff;
        }
        .section-head {
            margin-bottom: 44px;
        }
        .section-eyebrow {
            font-family: var(--font-en);
            font-size: 13px;
            letter-spacing: 0.16em;
            color: var(--primary);
            text-transform: uppercase;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }
        .section-eyebrow::before {
            content: "";
            width: 22px;
            height: 1.5px;
            background: var(--primary);
            display: inline-block;
        }
        .section-title {
            font-size: 40px;
            font-weight: 700;
            line-height: 1.2;
            color: var(--text);
            letter-spacing: 0.01em;
            margin: 0;
        }
        .section-title.light {
            color: #fff;
        }
        .section-sub {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-light);
            margin-top: 16px;
            max-width: 768px;
        }

        /* ============ capability panel / first feature ============ */
        .capability-wrap {
            display: grid;
            grid-template-columns: 5fr 7fr;
            gap: 56px;
            align-items: start;
        }
        .capability-sticky {
            position: sticky;
            top: 40px;
        }
        .capability-list {
            border-top: 1px solid var(--border);
        }
        .capability-item {
            display: flex;
            align-items: flex-start;
            gap: 22px;
            padding: 22px 0;
            border-bottom: 1px solid var(--border);
            transition: background 0.3s ease, padding-left 0.3s;
        }
        .capability-item:hover {
            background: rgba(200, 91, 34, 0.03);
            padding-left: 10px;
        }
        .capability-item .num {
            font-family: var(--font-en);
            font-size: 14px;
            color: var(--primary);
            letter-spacing: 0.06em;
            font-weight: 600;
            width: 30px;
            line-height: 1.4;
            flex-shrink: 0;
        }
        .capability-item .cap-body h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 8px;
            letter-spacing: 0.02em;
        }
        .capability-item .cap-body p {
            font-size: 14.5px;
            line-height: 1.9;
            color: var(--text-light);
            margin-bottom: 0;
            max-width: 620px;
        }
        .capability-item .arrow-link {
            margin-left: auto;
            color: var(--text-soft);
            font-size: 16px;
            align-self: center;
            transition: color 0.3s;
            flex-shrink: 0;
        }
        .capability-item:hover .arrow-link {
            color: var(--primary);
        }

        /* ============ product showcase blocks ============ */
        .product-showcase {
            background: #fff;
            padding: var(--space-section) 0;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .product-row {
            display: grid;
            grid-template-columns: repeat(12, 1fr);
            gap: 40px;
            align-items: center;
            margin-bottom: 76px;
        }
        .product-row:last-child {
            margin-bottom: 0;
        }
        .product-row .media-side {
            grid-column: span 6;
        }
        .product-row .text-side {
            grid-column: span 6;
        }
        .product-row.reverse .media-side {
            grid-column: 7 / 13;
            grid-row: 1;
        }
        .product-row.reverse .text-side {
            grid-column: 1 / 7;
            grid-row: 1;
        }
        .product-figure {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            aspect-ratio: 4 / 3;
            background: var(--deep);
        }
        .product-figure img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease, border 0.3s;
        }
        .product-figure::after {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            content: "";
            border-radius: var(--radius);
            box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
            pointer-events: none;
        }
        .product-figure:hover img {
            transform: scale(1.03);
        }
        .product-figure:hover {
            border: 1px solid rgba(200, 91, 34, 0.6);
        }
        .figure-tag {
            position: absolute;
            top: 16px;
            left: 16px;
            z-index: 2;
            background: rgba(16, 25, 27, 0.7);
            backdrop-filter: blur(4px);
            -webkit-backdrop-filter: blur(4px);
            color: #fff;
            font-size: 12px;
            letter-spacing: 0.09em;
            padding: 5px 14px;
            border-radius: 4px;
            border-left: 3px solid var(--primary);
        }
        .product-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 18px;
            font-size: 13px;
            color: var(--primary);
            font-weight: 600;
            letter-spacing: 0.05em;
        }
        .product-badge i {
            font-size: 13px;
        }
        .product-row h2 {
            font-size: 34px;
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 20px;
            color: var(--text);
        }
        .product-row .product-desc {
            font-size: 15.5px;
            line-height: 2;
            color: var(--text-light);
            margin-bottom: 16px;
        }
        .product-detail-list {
            margin: 0 0 20px;
            padding: 0;
        }
        .product-detail-list li {
            display: flex;
            gap: 12px;
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.9;
            padding-left: 0;
            position: relative;
        }
        .product-detail-list li i {
            color: var(--primary);
            font-size: 13px;
            margin-top: 8px;
        }

        /* ============ process ============ */
        .process-section {
            background: var(--deep-2);
            padding: var(--space-section) 0;
        }
        .process-section .section-title {
            color: #fff;
        }
        .process-section .section-sub {
            color: rgba(255, 255, 255, 0.78);
        }
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 44px;
        }
        .process-card {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius);
            padding: 28px 24px;
            transition: all 0.3s ease;
        }
        .process-card:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(200, 91, 34, 0.6);
            transform: translateY(-4px);
        }
        .process-card .prc-num {
            font-family: var(--font-en);
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1;
            margin-bottom: 16px;
            display: block;
        }
        .process-card h3 {
            color: #fff;
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 12px;
        }
        .process-card p {
            color: rgba(255, 255, 255, 0.68);
            font-size: 13px;
            line-height: 1.8;
            margin: 0;
        }

        /* ============ spec capability mini ============ */
        .capability-strip {
            background: var(--warm-white);
            padding: var(--space-section) 0;
        }
        .spec-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            margin-top: 24px;
        }
        .spec-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 28px;
            transition: all 0.35s ease;
        }
        .spec-card:hover {
            transform: translateY(-3px);
            border-color: rgba(200, 91, 34, 0.35);
            box-shadow: var(--shadow);
        }
        .spec-card .spec-icon {
            width: 52px;
            height: 52px;
            background: var(--primary-soft);
            color: var(--primary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 20px;
        }
        .spec-card h3 {
            font-size: 19px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 10px;
        }
        .spec-card p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.85;
            margin: 0;
        }

        /* ============ CTA section ============ */
        .cta-section {
            padding: var(--space-section) 0;
            background: var(--warm-white);
        }
        .cta-inner-box {
            background: var(--deep);
            border-radius: 12px;
            padding: 70px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 48px;
            position: relative;
            overflow: hidden;
        }
        .cta-inner-box::after {
            content: "";
            position: absolute;
            right: -90px;
            top: -90px;
            width: 240px;
            height: 240px;
            border: 2px solid rgba(200, 91, 34, 0.2);
            border-radius: 50%;
        }
        .cta-inner-box::before {
            content: "";
            position: absolute;
            right: -20px;
            top: -20px;
            width: 160px;
            height: 160px;
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 50%;
        }
        .cta-inner-box h2 {
            color: #fff;
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 10px;
            letter-spacing: 0.02em;
        }
        .cta-inner-box p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 16px;
            max-width: 620px;
            line-height: 1.9;
            margin-bottom: 0;
        }
        .cta-inner-box .btn-wrap {
            flex-shrink: 0;
            position: relative;
            z-index: 2;
        }

        /* ============ footer ============ */
        .site-footer {
            background: #111B1C;
            padding-top: 68px;
            margin-top: 0;
            border-top: 3px solid rgba(200, 91, 34, 0.5);
        }
        .site-footer .footer-top {
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            padding-bottom: 40px;
            margin-bottom: 30px;
        }
        .footer-brand .brand-en {
            font-family: var(--font-en);
            font-size: 12px;
            letter-spacing: 0.16em;
            color: var(--primary);
            display: block;
            text-transform: uppercase;
            margin-bottom: 12px;
        }
        .footer-brand .brand-cn {
            font-size: 22px;
            color: #fff;
            font-weight: 700;
            display: block;
            margin-bottom: 16px;
            letter-spacing: 0.03em;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.9;
            color: rgba(255, 255, 255, 0.6);
            max-width: 360px;
            margin-bottom: 0;
        }
        .footer-brand .brand-icon {
            width: 48px;
            height: 48px;
            border: 1px solid rgba(200, 91, 34, 0.35);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 18px;
            background: rgba(200, 91, 34, 0.08);
            color: var(--primary);
            font-size: 22px;
        }
        .footer-col h4 {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.9);
            font-weight: 600;
            margin-bottom: 16px;
            letter-spacing: 0.04em;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-col h4::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 22px;
            height: 2px;
            background: var(--primary);
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: all 0.3s ease;
            padding: 4px 0;
            line-height: 1.6;
        }
        .footer-col ul li a i {
            font-size: 12px;
            transition: transform 0.3s ease;
            opacity: 0.7;
        }
        .footer-col ul li a:hover {
            color: var(--primary);
            padding-left: 3px;
        }
        .footer-col ul li a:hover i {
            transform: translateX(4px);
        }
        .footer-bottom {
            padding-bottom: 28px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 14px;
            align-items: center;
        }
        .footer-bottom p {
            margin: 0;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.35);
            line-height: 1.7;
        }
        .footer-bottom p a {
            color: rgba(255, 255, 255, 0.45);
        }
        .footer-bottom p a:hover {
            color: var(--primary);
        }

        /* ============ divider ============ */
        .divider-light {
            border-top: 1px solid var(--border);
        }

        /* ============ tech list / featured table ============ */
        .tech-badge {
            display: inline-block;
            background: var(--deep-2);
            color: #fff;
            font-size: 12px;
            padding: 4px 10px;
            border-radius: 4px;
            letter-spacing: 0.04em;
            margin-right: 8px;
            margin-top: 5px;
        }
        .tech-badge.alt {
            background: var(--primary-soft);
            color: var(--primary);
            border: 1px solid rgba(200, 91, 34, 0.3);
        }

        /* ============ back-to-detail link ============ */
        .learn-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--primary);
            font-weight: 600;
            font-size: 15px;
            transition: gap 0.3s;
            margin-top: 6px;
        }
        .learn-link:hover {
            gap: 12px;
            color: var(--primary-dark);
        }

        /* ============ FAQ inline ============ */
        .faq-simple {
            margin-top: 70px;
        }
        .faq-grid-simple {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px 34px;
        }
        .faq-item-simple {
            padding: 20px 0;
            border-bottom: 1px solid var(--border);
            display: flex;
            gap: 14px;
            align-items: flex-start;
        }
        .faq-item-simple .faq-icon {
            width: 22px;
            height: 22px;
            border-radius: 50%;
            background: var(--primary-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 11px;
            flex-shrink: 0;
            margin-top: 3px;
        }
        .faq-item-simple h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 6px;
        }
        .faq-item-simple p {
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-light);
            margin: 0;
        }

        /* ============ media ============ */
        @media (max-width: 1199.98px) {
            .category-hero h1 {
                font-size: 60px;
            }
            .section-title {
                font-size: 36px;
            }
            .product-row h2 {
                font-size: 30px;
            }
            .cta-inner-box {
                padding: 55px;
            }
            .capability-wrap {
                gap: 40px;
            }
            .process-grid {
                gap: 20px;
            }
        }

        @media (max-width: 991.98px) {
            :root {
                --space-section: 72px;
            }
            .side-nav {
                transform: translateX(-100%);
                transition: transform 0.35s ease-in-out;
            }
            .side-nav.open {
                transform: translateX(0);
            }
            .page-wrapper {
                flex-direction: column;
            }
            .main-content {
                margin-left: 0;
                margin-top: 0;
            }
            .mobile-header {
                display: flex;
            }
            .category-hero {
                padding: 80px 0 90px;
            }
            .category-hero h1 {
                font-size: 50px;
            }
            /* drawer overlay visible when nav begins */
            .drawer-overlay {
                display: none;
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                bottom: 0;
                background: rgba(16, 25, 27, 0.6);
                z-index: 1045;
            }
            .drawer-overlay.show {
                display: block;
            }
            /* side-nav with z index 1050 above mobile header 1040 */
            .nav-brand {
                height: 82px;
            }

            .capability-wrap {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .capability-sticky {
                position: static;
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .spec-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .product-row,
            .product-row.reverse {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .product-row .media-side,
            .product-row.reverse .media-side {
                grid-row: auto;
                grid-column: 1;
            }
            .product-row.reverse .text-side,
            .product-row .text-side {
                grid-column: 1;
                grid-row: auto;
            }
            .cta-inner-box {
                flex-direction: column;
                text-align: center;
                padding: 45px 36px;
                align-items: center;
            }
            .cta-inner-box p {
                margin-left: auto;
                margin-right: auto;
            }
            .faq-grid-simple {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 767.98px) {
            :root {
                --space-section: 60px;
            }
            .category-hero {
                padding: 60px 0 70px;
            }
            .category-hero h1 {
                font-size: 42px;
                line-height: 1.15;
            }
            .category-hero p.hero-desc {
                font-size: 16px;
            }
            .section-title {
                font-size: 30px;
            }
            .section-eyebrow {
                font-size: 12px;
            }
            .product-row h2 {
                font-size: 26px;
            }
            .spec-grid {
                grid-template-columns: 1fr;
            }
            .page-breadcrumb {
                padding: 18px 0;
                font-size: 12px;
            }
            .container {
                padding-left: 20px;
                padding-right: 20px;
            }
            .btn {
                padding: 11px 20px;
            }
            .process-grid {
                gap: 14px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: left;
                gap: 6px;
            }
        }

        @media (max-width: 575.98px) {
            .category-hero h1 {
                font-size: 36px;
            }
            .category-hero p.hero-desc {
                font-size: 15px;
                line-height: 1.8;
            }
            .hero-quote {
                align-items: flex-start;
                flex-wrap: wrap;
            }
            .cta-inner-box {
                padding: 34px 22px;
            }
            .cta-inner-box h2 {
                font-size: 24px;
            }
            .product-row .media-side {
                border-radius: var(--radius);
            }
            .capability-item {
                flex-wrap: wrap;
                row-gap: 8px;
            }
            .capability-item .arrow-link {
                margin-left: 0;
            }
        }

        /* ============ focus visibility ============ */
        :focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .btn:focus-visible {
            box-shadow: 0 0 0 3px rgba(200, 91, 34, 0.25);
            outline: none;
        }

        /* ============ reduced motion ============ */
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                transition-duration: 0.01ms !important;
            }
            html {
                scroll-behavior: auto;
            }
        }

/* roulang page: article */
:root{
  --abb-orange:#C85B22;
  --abb-orange-dark:#A84919;
  --abb-teal:#1D4E52;
  --abb-ink:#10191B;
  --abb-deep:#111B1C;
  --abb-warm:#F5F4F0;
  --abb-white:#FFFFFF;
  --abb-text:#1E2B2C;
  --abb-soft:#344142;
  --abb-muted:#708081;
  --abb-border:#E4DFD6;
  --abb-border-sm:#ECE8E0;
  --abb-radius:8px;
  --abb-radius-sm:5px;
  --abb-shadow:0 8px 28px rgba(16,25,27,.06);
  --abb-shadow-hover:0 14px 34px rgba(16,25,27,.08);
}

*{box-sizing:border-box}
body{
  margin:0;
  background:#10191B;
  color:var(--abb-text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
}
a{text-decoration:none;color:inherit}
a:hover{color:var(--abb-orange)}
img{max-width:100%;display:block;height:auto}
button{font-family:inherit}
h1,h2,h3,h4,h5,h6{margin-top:0}

/* ===== Layout Shell ===== */
.site-shell{display:flex;min-height:100vh;width:100%}
.main-content{
  width:100%;
  min-height:100vh;
  background:var(--abb-warm);
  display:flex;
  flex-direction:column;
  margin-left:0;
  padding-top:60px;
}

/* ===== Sidebar ===== */
.sidebar{
  position:fixed;
  top:0;
  left:0;
  bottom:0;
  width:270px;
  background:var(--abb-ink);
  display:none;
  flex-direction:column;
  z-index:1030;
  border-right:1px solid rgba(255,255,255,.06);
}
.sidebar-inner{
  height:100%;
  display:flex;
  flex-direction:column;
  padding:28px 20px 26px;
}
.brand-block{
  padding:0 12px;
  margin-bottom:42px;
}
.brand-en{
  font-family:"DIN Alternate","Barlow Condensed",sans-serif;
  font-style:normal;
  display:block;
  font-size:11px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--abb-orange);
}
.brand-cn{
  display:block;
  font-size:24px;
  font-weight:700;
  line-height:1.25;
  letter-spacing:.06em;
  color:#FFFFFF;
  margin-top:6px;
}

.side-nav ul{list-style:none;margin:0;padding:0}
.side-nav a{
  display:flex;
  align-items:center;
  gap:12px;
  padding:13px 16px;
  margin-bottom:2px;
  border-left:3px solid transparent;
  color:rgba(245,244,240,.65);
  font-size:15px;
  line-height:1.5;
  transition:background .25s ease,color .25s ease,border-color .25s ease;
}
.side-nav a .nav-num{
  font-family:"DIN Alternate","Barlow Condensed",sans-serif;
  font-size:13px;
  min-width:26px;
  color:rgba(200,91,34,.85);
  letter-spacing:.06em;
}
.side-nav a:hover{
  color:#FFFFFF;
  background:rgba(200,91,34,.08);
}
.side-nav a.current{
  color:#FFFFFF;
  background:linear-gradient(90deg,rgba(200,91,34,.14),rgba(200,91,34,0) 78%);
  border-left-color:var(--abb-orange);
}
.side-nav a.current .nav-num{opacity:1}

.sidebar-contact{
  margin-top:auto;
  border-top:1px solid rgba(255,255,255,.08);
  padding:22px 14px 4px;
}
.contact-title{
  display:block;
  font-size:12px;
  letter-spacing:.16em;
  color:var(--abb-orange);
  text-transform:uppercase;
  margin-bottom:12px;
}
.sidebar-contact a,
.sidebar-contact span{
  display:flex;
  align-items:center;
  gap:10px;
  color:rgba(245,244,240,.58);
  font-size:13px;
  line-height:2.3;
  transition:color .2s;
}
.sidebar-contact a:hover,
.sidebar-contact a:focus{color:#fff}
.sidebar-contact i{
  width:16px;
  text-align:center;
  color:rgba(200,91,34,.9);
  font-size:12px;
}

/* ===== Mobile Header ===== */
.mobile-header{
  position:fixed;
  top:0;
  left:0;
  right:0;
  z-index:1040;
  height:60px;
  background:var(--abb-ink);
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:0 16px;
  border-bottom:1px solid rgba(255,255,255,.08);
  box-shadow:0 4px 18px rgba(0,0,0,.18);
}
.mobile-header .mobile-brand{
  display:flex;
  flex-direction:column;
  line-height:1.2;
}
.mobile-brand .mb-en{
  color:var(--abb-orange);
  font-family:"DIN Alternate","Barlow Condensed",sans-serif;
  font-size:10px;
  letter-spacing:.16em;
  text-transform:uppercase;
}
.mobile-brand .mb-cn{
  color:#fff;
  font-size:17px;
  font-weight:700;
  letter-spacing:.04em;
  margin-top:2px;
}
.mobile-toggler{
  width:42px;
  height:42px;
  background:transparent;
  border:1px solid rgba(255,255,255,.18);
  border-radius:5px;
  color:#fff;
  font-size:18px;
  cursor:pointer;
  transition:border-color .2s,background .2s;
}
.mobile-toggler:hover,
.mobile-toggler:focus{
  border-color:var(--abb-orange);
  background:rgba(200,91,34,.12);
}

/* ===== Mobile Drawer ===== */
.mobile-drawer{
  --bs-offcanvas-width:min(320px,84%) !important;
  background:var(--abb-ink) !important;
}
.mobile-drawer .offcanvas-header{
  border-bottom:1px solid rgba(255,255,255,.08);
  padding:18px 20px;
}
.mobile-drawer .offcanvas-body{
  padding:26px 20px 34px;
  background:var(--abb-ink);
}
.mobile-drawer .side-nav a{
  font-size:17px;
  padding:16px 12px;
  color:rgba(245,244,240,.72);
}
.mobile-drawer .side-nav a.current{
  color:#fff;
  background:rgba(200,91,34,.12);
  border-left-color:var(--abb-orange);
}
.mobile-drawer .drawer-contact{
  margin-top:48px;
  border-top:1px solid rgba(255,255,255,.09);
  padding-top:22px;
}
.mobile-drawer .drawer-contact a,
.mobile-drawer .drawer-contact span{
  color:rgba(245,244,240,.65);
  font-size:14px;
  line-height:2.4;
  display:flex;
  gap:10px;
  align-items:center;
}
.mobile-drawer .drawer-contact a:hover{color:#fff}
.mobile-drawer .drawer-contact i{
  color:var(--abb-orange);
  width:16px;
}

/* ===== Container ===== */
.main-content .container{
  max-width:1320px;
  padding-left:24px;
  padding-right:24px;
}

/* ===== Article Hero ===== */
.article-hero{
  position:relative;
  background:var(--abb-ink);
  color:#fff;
  padding:56px 0 64px;
  overflow:hidden;
}
.article-hero .hero-bg{
  position:absolute;
  inset:0;
  background-size:cover;
  background-position:center;
  opacity:.26;
}
.article-hero .hero-bg:after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(90deg,rgba(16,25,27,.96) 0%,rgba(16,25,27,.45) 100%);
}
.article-hero .container{position:relative;z-index:2}

.crumb{
  list-style:none;
  display:flex;
  flex-wrap:wrap;
  gap:0;
  padding:0;
  margin:0 0 30px;
  font-size:13px;
  color:rgba(255,255,255,.55);
}
.crumb li{display:flex;align-items:center}
.crumb li+li:before{
  content:"/";
  margin:0 10px;
  color:rgba(255,255,255,.25);
}
.crumb a{color:rgba(255,255,255,.66)}
.crumb a:hover{color:#fff}
.crumb .active{color:var(--abb-orange)}

.article-cat{
  display:inline-block;
  border:1px solid rgba(200,91,34,.65);
  color:var(--abb-orange);
  font-size:12px;
  letter-spacing:.12em;
  padding:6px 13px;
  border-radius:4px;
  margin-bottom:20px;
  background:rgba(200,91,34,.08);
}
.article-hero h1{
  font-size:50px;
  font-weight:700;
  line-height:1.18;
  margin:0 0 26px;
  max-width:1020px;
  letter-spacing:.02em;
  color:#fff;
}
.article-pub{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:22px;
  color:rgba(255,255,255,.56);
  font-size:13px;
  line-height:1.5;
  padding-bottom:18px;
  border-bottom:1px solid rgba(255,255,255,.14);
}
.article-pub i{
  margin-right:7px;
  color:var(--abb-orange);
}

/* ===== Article Body ===== */
.article-main-area{
  padding:52px 0 28px;
}
.article-paper{
  background:#fff;
  border:1px solid var(--abb-border-sm);
  border-radius:10px;
  box-shadow:var(--abb-shadow);
  padding:56px 58px;
  max-width:900px;
  margin:0 auto;
}

.article-toolbar{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  border-bottom:1px solid var(--abb-border);
  padding-bottom:18px;
  margin-bottom:42px;
}
.toolbar-info{
  color:var(--abb-muted);
  font-size:13px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:16px;
}
.toolbar-info i{
  color:var(--abb-orange);
  margin-right:6px;
}
.share-group{
  display:flex;
  align-items:center;
  gap:8px;
}
.share-group .share-label{
  font-size:12px;
  color:var(--abb-muted);
  margin-right:2px;
}
.share-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:34px;
  height:34px;
  border-radius:50%;
  border:1px solid var(--abb-border);
  background:#fff;
  color:#566263;
  font-size:14px;
  cursor:pointer;
  transition:all .2s ease;
}
.share-btn:hover,
.share-btn:focus{
  background:var(--abb-orange);
  border-color:var(--abb-orange);
  color:#fff;
  outline:none;
}

/* ===== Article Content ===== */
.article-content{
  font-size:17px;
  line-height:2;
  color:#273334;
}
.article-content p{
  margin-bottom:1.8em;
}
.article-content h2{
  font-size:26px;
  font-weight:700;
  color:var(--abb-ink);
  line-height:1.4;
  margin:2.2em 0 .9em;
  padding-left:15px;
  border-left:4px solid var(--abb-orange);
}
.article-content h3{
  font-size:21px;
  font-weight:700;
  color:var(--abb-ink);
  margin:2em 0 .7em;
}
.article-content h4{
  font-size:18px;
  font-weight:700;
  color:var(--abb-text);
  margin:1.6em 0 .6em;
}
.article-content img{
  border-radius:8px;
  margin:28px 0;
}
.article-content blockquote{
  margin:2em 0;
  background:#FAF7F2;
  border-left:4px solid var(--abb-orange);
  padding:18px 24px;
  color:#576262;
  font-size:16px;
  border-radius:0 6px 6px 0;
}
.article-content ul,
.article-content ol{
  margin:1.6em 0 2em;
  padding-left:1.6em;
}
.article-content li{
  margin-bottom:.5em;
}
.article-content table{
  width:100%;
  border-collapse:collapse;
  margin:2em 0 2.4em;
  background:#fff;
  border:1px solid var(--abb-border-sm);
}
.article-content table th,
.article-content table td{
  border:1px solid var(--abb-border);
  padding:12px 16px;
  text-align:left;
  vertical-align:top;
  font-size:15px;
  line-height:1.7;
}
.article-content table th{
  background:#F4F1EA;
  font-weight:600;
  color:#212B2C;
}
.article-content pre{
  background:#141E20;
  color:#E5D9C8;
  border-radius:8px;
  padding:20px 22px;
  overflow:auto;
  font-size:14px;
  line-height:1.75;
  margin:2em 0;
}
.article-content code{
  background:rgba(200,91,34,.08);
  color:var(--abb-orange-dark);
  padding:2px 7px;
  border-radius:4px;
  font-size:.9em;
}
.article-content pre code{
  background:transparent;
  color:inherit;
  padding:0;
}
.article-content a{
  color:var(--abb-orange);
  border-bottom:1px solid rgba(200,91,34,.35);
}
.article-content a:hover{
  color:var(--abb-orange-dark);
  border-bottom-color:var(--abb-orange);
}

/* ===== Tags & Pager ===== */
.article-tags-line{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  border-top:1px solid var(--abb-border-sm);
  padding-top:26px;
  margin-top:52px;
}
.tag-label{
  font-size:13px;
  font-weight:600;
  color:#596667;
}
.tag-chip{
  display:inline-flex;
  align-items:center;
  font-size:13px;
  line-height:1.4;
  color:#4B585A;
  border:1px solid var(--abb-border);
  background:#FCFBF8;
  border-radius:99px;
  padding:7px 15px;
  transition:all .2s;
}
.tag-chip:hover{
  border-color:var(--abb-orange);
  color:var(--abb-orange);
  background:#FFF;
}
.article-pager{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  align-items:center;
  gap:14px;
  margin-top:34px;
}
.pager-link{
  display:inline-flex;
  align-items:center;
  gap:9px;
  background:#FCFBF8;
  border:1px solid var(--abb-border);
  border-radius:6px;
  padding:11px 18px;
  color:#435052;
  font-size:14px;
  transition:all .2s ease;
}
.pager-link i{
  color:var(--abb-orange);
  font-size:12px;
}
.pager-link:hover{
  border-color:var(--abb-orange);
  color:var(--abb-orange);
  transform:translateY(-2px);
}
.pager-back{
  font-size:14px;
  color:#647272;
  padding:9px 4px;
  border-bottom:1px solid transparent;
}
.pager-back:hover{
  color:var(--abb-orange);
  border-bottom-color:rgba(200,91,34,.3);
}

/* ===== Not Found ===== */
.article-missing{
  min-height:70vh;
  display:flex;
  align-items:center;
  padding:80px 0;
}
.missing-card{
  max-width:620px;
  margin:0 auto;
  background:#fff;
  border:1px solid var(--abb-border-sm);
  border-radius:10px;
  box-shadow:var(--abb-shadow);
  text-align:center;
  padding:70px 44px;
}
.missing-card i{
  font-size:44px;
  color:var(--abb-orange);
  opacity:.8;
  margin-bottom:20px;
}
.missing-card h2{
  font-size:30px;
  font-weight:700;
  color:var(--abb-ink);
  margin-bottom:14px;
}
.missing-card p{
  color:var(--abb-muted);
  font-size:16px;
  line-height:1.8;
  margin-bottom:30px;
}

/* ===== Buttons ===== */
.btn{
  border-radius:5px;
  font-weight:600;
  padding:.78rem 1.7rem;
  transition:all .2s ease;
  font-size:15px;
}
.btn-brand{
  background:var(--abb-orange);
  border:1px solid var(--abb-orange);
  color:#fff !important;
}
.btn-brand:hover,
.btn-brand:focus{
  background:var(--abb-orange-dark);
  border-color:var(--abb-orange-dark);
  transform:translateY(-2px);
  color:#fff !important;
  box-shadow:0 8px 18px rgba(200,91,34,.28);
}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--abb-orange);
  font-weight:600;
  font-size:14px;
}
.link-arrow .arrow-ico{
  transition:transform .2s ease;
}
.link-arrow:hover .arrow-ico{
  transform:translateX(4px);
}

/* ===== Related ===== */
.related-section{
  padding:58px 0 70px;
}
.related-heading{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  flex-wrap:wrap;
  margin-bottom:34px;
}
.section-en{
  display:block;
  font-family:"DIN Alternate","Barlow Condensed",sans-serif;
  font-size:12px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--abb-orange);
  margin-bottom:8px;
}
.related-heading h2{
  font-size:32px;
  font-weight:700;
  margin:0;
  color:var(--abb-ink);
  letter-spacing:.02em;
}
.related-heading .text-btn{
  color:var(--abb-orange);
  font-weight:600;
  font-size:14px;
  display:inline-flex;
  align-items:center;
  gap:8px;
}
.related-heading .text-btn i{
  transition:transform .2s;
}
.related-heading .text-btn:hover i{
  transform:translateX(4px);
}

.related-card{
  height:100%;
  background:#fff;
  border:1px solid var(--abb-border-sm);
  border-radius:9px;
  overflow:hidden;
  display:flex;
  flex-direction:column;
  box-shadow:0 3px 12px rgba(16,25,27,.04);
  transition:transform .28s ease,border-color .28s ease,box-shadow .28s ease;
}
.related-card:hover{
  transform:translateY(-4px);
  border-color:rgba(200,91,34,.55);
  box-shadow:var(--abb-shadow-hover);
}
.related-card .related-img{
  aspect-ratio:16/10;
  overflow:hidden;
  background:#E7E5DF;
}
.related-card .related-img img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .5s ease;
}
.related-card:hover .related-img img{
  transform:scale(1.04);
}
.related-card .related-body{
  padding:22px 22px 24px;
  display:flex;
  flex-direction:column;
  flex:1 0 auto;
}
.related-card .related-meta{
  font-size:12px;
  color:var(--abb-muted);
  display:flex;
  gap:14px;
  margin-bottom:10px;
}
.related-card .related-meta i{
  color:var(--abb-orange);
  margin-right:4px;
}
.related-card h3{
  font-size:18px;
  font-weight:600;
  line-height:1.55;
  color:var(--abb-text);
  margin:4px 0 14px;
  transition:color .2s;
}
.related-card:hover h3{
  color:var(--abb-orange-dark);
}
.related-card .related-more{
  margin-top:auto;
  padding-top:14px;
  color:var(--abb-orange);
  font-weight:600;
  font-size:14px;
  display:inline-flex;
  align-items:center;
  gap:8px;
}
.related-card .related-more i{
  transition:transform .2s ease;
}
.related-card:hover .related-more i{
  transform:translateX(4px);
}

/* ===== CTA ===== */
.cta-section{
  padding:0 0 84px;
}
.cta-band{
  max-width:1120px;
  margin:0 auto;
  background:var(--abb-teal);
  color:#fff;
  border-radius:10px;
  padding:42px 52px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  flex-wrap:wrap;
  position:relative;
  overflow:hidden;
}
.cta-band:before{
  content:"";
  position:absolute;
  right:-70px;
  top:-90px;
  width:260px;
  height:260px;
  background:rgba(255,255,255,.04);
  border-radius:50%;
}
.cta-band h3{
  font-size:26px;
  font-weight:700;
  margin:0 0 10px;
  letter-spacing:.02em;
}
.cta-band p{
  margin:0;
  color:rgba(255,255,255,.78);
  font-size:15px;
  line-height:1.9;
  max-width:720px;
}
.cta-band .btn-brand{
  background:#fff;
  border-color:#fff;
  color:var(--abb-teal) !important;
  font-weight:700;
  flex:0 0 auto;
}
.cta-band .btn-brand:hover{
  background:rgba(255,255,255,.9);
  border-color:#fff;
  color:var(--abb-teal) !important;
  box-shadow:0 8px 20px rgba(0,0,0,.18);
}

/* ===== Footer ===== */
.site-footer{
  background:var(--abb-deep);
  color:rgba(255,255,255,.68);
  padding:70px 0 0;
  margin-top:auto;
  font-size:14px;
  line-height:1.85;
}
.site-footer .container{
  max-width:1320px;
}
.footer-top{
  padding-bottom:34px;
  border-bottom:1px solid rgba(255,255,255,.08);
  margin-bottom:24px;
}
.footer-brand .brand-cn{
  color:#fff;
  font-size:22px;
  font-weight:700;
  letter-spacing:.06em;
}
.footer-brand .brand-en{
  font-family:"DIN Alternate","Barlow Condensed",sans-serif;
  font-size:11px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--abb-orange);
  display:block;
  margin-bottom:12px;
}
.footer-brand p{
  color:rgba(255,255,255,.5);
  font-size:14px;
  line-height:1.9;
  max-width:340px;
  margin-top:16px;
  margin-bottom:0;
}
.footer-col h4{
  color:#fff;
  font-size:15px;
  font-weight:600;
  letter-spacing:.1em;
  margin-bottom:16px;
}
.footer-col ul{
  list-style:none;
  margin:0;
  padding:0;
}
.footer-col li{
  margin-bottom:0;
}
.footer-col a{
  color:rgba(255,255,255,.56);
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-height:40px;
  line-height:1.4;
  font-size:14px;
  transition:color .2s ease;
}
.footer-col a i{
  font-size:10px;
  color:var(--abb-orange);
}
.footer-col a:hover{
  color:#fff;
}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  flex-wrap:wrap;
  padding-bottom:26px;
  color:rgba(255,255,255,.38);
  font-size:13px;
}
.footer-bottom .footer-domain{
  letter-spacing:.04em;
  font-family:"DIN Alternate","Barlow Condensed",sans-serif;
  text-transform:uppercase;
  font-size:12px;
}

/* ===== Responsive ===== */
@media(min-width:992px){
  .sidebar{display:flex}
  .mobile-header{display:none}
  .main-content{
    margin-left:270px;
    padding-top:0;
  }
}

@media(max-width:1199px){
  .article-hero h1{font-size:42px}
  .article-paper{padding:44px 44px}
}

@media(max-width:767.98px){
  .main-content .container{
    padding-left:18px;
    padding-right:18px;
  }
  .article-hero{
    padding:40px 0 48px;
  }
  .article-hero h1{
    font-size:31px;
    line-height:1.28;
  }
  .article-pub{
    gap:12px;
    font-size:12px;
  }
  .article-main-area{
    padding:22px 0 20px;
  }
  .article-paper{
    padding:28px 20px;
    border-radius:6px;
  }
  .article-toolbar{
    flex-direction:column;
    align-items:flex-start;
  }
  .article-content{
    font-size:16px;
    line-height:2;
  }
  .article-content h2{
    font-size:22px;
  }
  .article-content table{
    display:block;
    overflow-x:auto;
    white-space:nowrap;
  }
  .article-tags-line{
    margin-top:40px;
  }
  .article-pager{
    justify-content:center;
  }
  .related-section{
    padding:44px 0 60px;
  }
  .related-heading h2{
    font-size:26px;
  }
  .cta-section{
    padding:0 0 56px;
  }
  .cta-band{
    padding:32px 26px;
    flex-direction:column;
    align-items:flex-start;
  }
  .cta-band .btn-brand{
    width:100%;
  }
  .cta-band h3{
    font-size:21px;
  }
  .site-footer{
    padding-top:48px;
  }
  .footer-bottom{
    justify-content:center;
    text-align:center;
  }
  .missing-card{
    padding:60px 24px;
  }
}

@media(max-width:575px){
  .crumb{
    font-size:12px;
  }
  .article-cat{
    font-size:11px;
  }
  .article-hero h1{
    font-size:28px;
  }
  .related-card .related-body{
    padding:18px;
  }
  .related-card h3{
    font-size:16px;
  }
  .pager-back{
    display:none;
  }
  .article-pager{
    flex-direction:column;
    width:100%;
  }
  .pager-link{
    width:100%;
    justify-content:center;
  }
  .article-toolbar .toolbar-info{
    gap:10px;
    flex-direction:column;
    align-items:flex-start;
  }
}

/* roulang page: category2 */
:root {
            --acc: #C85B22;
            --acc-hover: #A84818;
            --acc-light: rgba(200, 91, 34, .08);
            --teal: #1D4E52;
            --teal-dark: #153a3e;
            --ink: #10191B;
            --ink-2: #10191B;
            --warm: #F5F4F0;
            --card: #FFFFFF;
            --line: #E5E2DB;
            --line-dark: rgba(255, 255, 255, .13);
            --text: #1E2B2C;
            --muted: #697577;
            --head: #162022;
            --radius: 8px;
            --radius-sm: 5px;
            --shadow: 0 14px 34px rgba(16, 25, 27, .06);
            --shadow-hover: 0 18px 34px rgba(16, 25, 27, .09);
            --side-w: 278px;
            --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", sans-serif;
            --font-en: "Barlow Condensed", "DIN Alternate", "Roboto Condensed", sans-serif;
        }

        html {
            box-sizing: border-box;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        body {
            margin: 0;
            font-family: var(--font-cn);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text);
            background: var(--warm);
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            display: block;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color .25s ease;
        }

        ul,
        ol {
            margin: 0;
            padding: 0;
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            color: var(--head);
            margin: 0 0 .5em;
            line-height: 1.25;
        }

        p {
            margin-bottom: 1em;
        }

        button,
        input,
        textarea,
        select {
            font: inherit;
        }

        .sidebar {
            position: fixed;
            inset: 0 auto 0 0;
            width: var(--side-w);
            z-index: 1040;
            background: var(--ink);
        }

        .sidebar-inner {
            height: 100%;
            display: flex;
            flex-direction: column;
            background:
                linear-gradient(180deg, rgba(200, 91, 34, .035) 0%, transparent 28%),
                var(--ink);
            border-right: 1px solid rgba(255, 255, 255, .05);
        }

        .brand-block {
            min-height: 92px;
            padding: 22px 24px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, .09);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
        }

        .brand-link {
            display: flex;
            flex-direction: column;
            gap: 4px;
            min-width: 0;
        }

        .brand-en {
            font-family: var(--font-en);
            font-size: 11px;
            letter-spacing: .22em;
            color: var(--acc);
            text-transform: uppercase;
            white-space: nowrap;
        }

        .brand-cn {
            font-size: 20px;
            line-height: 1.2;
            font-weight: 700;
            letter-spacing: .02em;
            color: #fff;
        }

        .menu-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border: 1px solid rgba(255, 255, 255, .22);
            background: transparent;
            border-radius: var(--radius-sm);
            color: #fff;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: border-color .25s ease, background .25s ease;
        }

        .menu-toggle:hover {
            background: rgba(255, 255, 255, .07);
            border-color: var(--acc);
        }

        .sidebar-body {
            flex: 1;
            display: flex;
            flex-direction: column;
            padding: 12px 14px 18px;
        }

        .side-nav {
            margin: 0;
        }

        .side-nav li + li {
            margin-top: 2px;
        }

        .side-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            color: rgba(255, 255, 255, .68);
            font-size: 15px;
            padding: 13px 14px;
            border-radius: var(--radius-sm);
            border-left: 3px solid transparent;
            transition: color .25s ease, background-color .25s ease, border-color .25s ease;
            position: relative;
        }

        .side-nav a:hover {
            color: #fff;
            background: rgba(200, 91, 34, .1);
            border-left-color: rgba(200, 91, 34, .35);
        }

        .side-nav a.current {
            color: #fff;
            background: rgba(200, 91, 34, .1);
            border-left-color: var(--acc);
        }

        .nav-num {
            font-family: var(--font-en);
            font-size: 12px;
            letter-spacing: .1em;
            color: rgba(255, 255, 255, .45);
            min-width: 28px;
        }

        .side-nav a.current .nav-num {
            color: var(--acc);
        }

        .side-foot {
            margin-top: auto;
            padding: 16px 14px 6px;
            border-top: 1px solid rgba(255, 255, 255, .08);
            color: rgba(255, 255, 255, .48);
            font-size: 13px;
            line-height: 1.9;
        }

        .side-foot .phone {
            font-family: var(--font-en);
            font-size: 17px;
            color: rgba(255, 255, 255, .85);
        }

        .side-foot i {
            width: 20px;
            color: rgba(200, 91, 34, .78);
        }

        .sidebar-mask {
            display: none;
        }

        .main-content {
            margin-left: var(--side-w);
            background: var(--warm);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .content-shell {
            flex: 1;
        }

        .container-page {
            max-width: 1320px;
            margin: 0 auto;
            padding-left: clamp(20px, 4vw, 56px);
            padding-right: clamp(20px, 4vw, 56px);
        }

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-family: var(--font-en);
            font-size: 12px;
            letter-spacing: .18em;
            color: var(--acc);
            text-transform: uppercase;
            margin-bottom: 16px;
        }

        .eyebrow::before {
            content: "";
            width: 22px;
            height: 1px;
            background: var(--acc);
        }

        .btn {
            --bs-btn-border-radius: 6px;
            --bs-btn-font-weight: 600;
            --bs-btn-padding-x: 24px;
            --bs-btn-padding-y: 12px;
            --bs-btn-border-width: 1px;
            font-size: 15px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            border-radius: 6px;
            transition: background-color .25s ease, border-color .25s ease, color .25s ease, transform .25s ease, box-shadow .25s ease;
        }

        .btn i {
            font-size: 12px;
            transition: transform .25s ease;
        }

        .btn:hover i {
            transform: translateX(4px);
        }

        .btn:focus-visible {
            box-shadow: 0 0 0 3px rgba(200, 91, 34, .3);
        }

        .btn-accent {
            background: var(--acc);
            border-color: var(--acc);
            color: #fff;
        }

        .btn-accent:hover,
        .btn-accent:focus {
            background: var(--acc-hover);
            border-color: var(--acc-hover);
            color: #fff;
        }

        .btn-outline-light {
            border-color: rgba(255, 255, 255, .65);
            color: #fff;
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, .08);
            border-color: #fff;
            color: #fff;
        }

        .btn-dark {
            background: var(--ink);
            border-color: var(--ink);
            color: #fff;
        }

        .btn-dark:hover {
            background: #243638;
            border-color: #243638;
            color: #fff;
        }

        .breadcrumb-line {
            padding: 24px 0 0;
            font-size: 13px;
            color: #8B9697;
        }

        .breadcrumb-line a {
            color: #8B9697;
        }

        .breadcrumb-line a:hover {
            color: var(--acc);
        }

        .breadcrumb-line span {
            margin: 0 8px;
            color: #B9BEB8;
        }

        .category-hero {
            position: relative;
            padding: clamp(48px, 7vw, 100px) 0 clamp(50px, 7vw, 104px);
            background-image: linear-gradient(78deg, rgba(16, 25, 27, .92) 10%, rgba(16, 25, 27, .48) 64%, rgba(16, 25, 27, .82) 100%), url("/assets/images/backpic/back-3.png");
            background-size: cover;
            background-position: center;
            color: #fff;
        }

        .category-hero h1 {
            color: #fff;
            font-size: clamp(48px, 6vw, 76px);
            letter-spacing: .02em;
            line-height: 1.1;
            margin-bottom: 22px;
        }

        .category-hero .lead {
            max-width: 690px;
            font-size: 17px;
            line-height: 2;
            color: rgba(255, 255, 255, .82);
            margin-bottom: 34px;
        }

        .hero-note {
            margin-top: 28px;
            font-size: 13px;
            color: rgba(255, 255, 255, .5);
            letter-spacing: .08em;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: center;
        }

        .section-pad {
            padding: clamp(56px, 7vw, 96px) 0;
        }

        .scene-guide {
            position: relative;
        }

        .scene-sidebar {
            position: sticky;
            top: 36px;
        }

        .scene-sidebar h2 {
            font-size: clamp(26px, 3vw, 38px);
            line-height: 1.35;
            margin-bottom: 18px;
        }

        .scene-sidebar > p {
            color: var(--muted);
            font-size: 15px;
            line-height: 2;
        }

        .scene-anchor-list {
            margin-top: 30px;
            border-top: 1px solid var(--line);
        }

        .scene-anchor-list li {
            border-bottom: 1px solid var(--line);
        }

        .scene-anchor-list a {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 2px;
            font-size: 15px;
            color: var(--text);
            gap: 10px;
        }

        .scene-anchor-list a:hover {
            color: var(--acc);
        }

        .scene-anchor-list a i {
            font-size: 12px;
            color: var(--acc);
        }

        .scene-side-badge {
            display: inline-flex;
            margin-top: 26px;
            padding: 8px 14px;
            background: rgba(29, 78, 82, .08);
            border-radius: 4px;
            color: var(--teal);
            font-size: 13px;
            letter-spacing: .02em;
            border-left: 3px solid var(--teal);
        }

        .scene-cards {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }

        .scene-card {
            background: var(--card);
            border: 1px solid var(--line);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
        }

        .scene-card:hover {
            transform: translateY(-4px);
            border-color: rgba(200, 91, 34, .38);
            box-shadow: var(--shadow-hover);
        }

        .scene-card .row {
            min-height: 100%;
        }

        .scene-card-main {
            padding: clamp(24px, 4vw, 40px);
        }

        .scene-num {
            font-family: var(--font-en);
            font-size: 13px;
            letter-spacing: .2em;
            color: var(--acc);
            margin-bottom: 18px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .scene-num::after {
            content: "";
            width: 32px;
            height: 1px;
            background: rgba(200, 91, 34, .45);
        }

        .scene-card h3 {
            font-size: clamp(22px, 2.4vw, 29px);
            margin-bottom: 14px;
        }

        .scene-card p {
            color: var(--muted);
            font-size: 15px;
            line-height: 1.9;
        }

        .scene-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 18px;
        }

        .scene-tags span {
            display: inline-flex;
            align-items: center;
            padding: 4px 11px;
            border: 1px solid var(--line);
            border-radius: 100px;
            color: #5A6668;
            font-size: 12px;
            letter-spacing: .03em;
            background: #FCFBF8;
        }

        .scene-prod-list {
            padding: 0;
            margin: 20px 0 0;
        }

        .scene-prod-list li {
            position: relative;
            padding-left: 22px;
            color: #3E4C4E;
            font-size: 14px;
            line-height: 2;
        }

        .scene-prod-list li::before {
            content: "";
            position: absolute;
            left: 2px;
            top: 16px;
            width: 6px;
            height: 6px;
            background: var(--teal);
            border-radius: 1px;
            transform: rotate(45deg);
        }

        .scene-arrow {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--acc);
            margin-top: 22px;
        }

        .scene-arrow i {
            font-size: 12px;
            transition: transform .25s ease;
        }

        .scene-card:hover .scene-arrow i {
            transform: translateX(4px);
        }

        .scene-media {
            height: 100%;
            min-height: 230px;
            background: #E8E6DF;
        }

        .scene-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 230px;
        }

        .technical-panel {
            background:
                linear-gradient(100deg, rgba(29, 78, 82, .98) 0%, rgba(29, 78, 82, .9) 50%, rgba(16, 25, 27, .96) 100%);
            color: #fff;
            border-radius: 0;
        }

        .technical-panel .sec-title {
            color: #fff;
            font-size: clamp(28px, 3.4vw, 42px);
            margin-bottom: 16px;
        }

        .technical-panel .sec-desc {
            max-width: 720px;
            color: rgba(255, 255, 255, .72);
            font-size: 15px;
        }

        .tech-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 18px;
            margin-top: 36px;
        }

        .tech-card {
            background: rgba(255, 255, 255, .05);
            border: 1px solid rgba(255, 255, 255, .13);
            border-radius: var(--radius);
            padding: 26px 22px;
            transition: background .3s ease, transform .3s ease, border-color .3s ease;
            min-height: 210px;
        }

        .tech-card:hover {
            background: rgba(255, 255, 255, .09);
            border-color: rgba(200, 91, 34, .7);
            transform: translateY(-3px);
        }

        .tech-card i {
            color: #e8935e;
            font-size: 24px;
            margin-bottom: 18px;
        }

        .tech-card h4 {
            color: #fff;
            font-size: 18px;
            margin-bottom: 10px;
        }

        .tech-card p {
            color: rgba(255, 255, 255, .68);
            font-size: 13px;
            line-height: 1.9;
            margin: 0;
        }

        .process-strip {
            background: #FFFFFF;
            border: 1px solid var(--line);
            border-radius: var(--radius);
            padding: clamp(24px, 4vw, 44px);
            box-shadow: var(--shadow);
        }

        .process-step {
            text-align: left;
            position: relative;
            padding: 14px 14px 6px 50px;
            min-height: 130px;
        }

        .process-step .step-no {
            font-family: var(--font-en);
            font-size: 13px;
            letter-spacing: .16em;
            color: var(--acc);
            position: absolute;
            left: 0;
            top: 14px;
            width: 36px;
            height: 36px;
            border: 1px solid rgba(200, 91, 34, .35);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(200, 91, 34, .05);
        }

        .process-step h3 {
            font-size: 19px;
            margin-bottom: 6px;
        }

        .process-step p {
            color: var(--muted);
            font-size: 14px;
            line-height: 1.9;
            margin: 0;
        }

        .section-head-inline {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
            margin-bottom: 42px;
        }

        .section-head-inline h2 {
            font-size: clamp(28px, 3.2vw, 42px);
            margin: 0;
        }

        .section-head-inline .lead-text {
            max-width: 460px;
            color: var(--muted);
            margin: 0;
            font-size: 15px;
        }

        .faq-accordion .accordion-item {
            border: 0;
            border-top: 1px solid var(--line);
            background: transparent;
            border-radius: 0;
        }

        .faq-accordion .accordion-item:first-child {
            border-top: 0;
        }

        .faq-accordion .accordion-button {
            background: transparent;
            box-shadow: none;
            padding: 22px 8px 22px 0;
            font-size: 17px;
            font-weight: 600;
            color: var(--head);
            border: 0;
            border-radius: 0;
            display: flex;
            align-items: center;
            gap: 16px;
            transition: color .25s ease;
        }

        .faq-accordion .accordion-button::before {
            content: "+";
            font-size: 24px;
            font-weight: 300;
            color: var(--acc);
            line-height: 1;
            transition: transform .3s ease;
            order: 2;
            margin-left: auto;
            flex: 0 0 auto;
        }

        .faq-accordion .accordion-button:not(.collapsed)::before {
            transform: rotate(45deg);
        }

        .faq-accordion .accordion-button:not(.collapsed) {
            color: var(--acc);
        }

        .faq-accordion .accordion-button::after {
            display: none;
        }

        .faq-accordion .accordion-button:focus-visible {
            box-shadow: none;
            outline: 2px solid rgba(200, 91, 34, .4);
        }

        .faq-accordion .accordion-body {
            padding: 2px 48px 28px 0;
            color: var(--muted);
        }

        .cta-box {
            background: var(--ink);
            border-radius: var(--radius);
            color: #fff;
            padding: clamp(28px, 5vw, 58px);
            position: relative;
            overflow: hidden;
        }

        .cta-box::after {
            content: "";
            position: absolute;
            right: -80px;
            bottom: -80px;
            width: 260px;
            height: 260px;
            border: 1px solid rgba(200, 91, 34, .4);
            border-radius: 50%;
            background: radial-gradient(circle, rgba(200, 91, 34, .18), transparent 68%);
        }

        .cta-box h2 {
            color: #fff;
            font-size: clamp(26px, 3vw, 36px);
            margin-bottom: 10px;
        }

        .cta-box p {
            color: rgba(255, 255, 255, .68);
            margin: 0;
            max-width: 460px;
        }

        .project-form {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: clamp(20px, 4vw, 36px);
        }

        .project-form .form-label {
            font-weight: 600;
            color: var(--head);
            font-size: 14px;
            margin-bottom: 8px;
        }

        .project-form .form-control,
        .project-form .form-select {
            border-radius: 6px;
            border-color: #DEDBD3;
            background: #FBFBF8;
            padding: 11px 14px;
            font-size: 15px;
            color: var(--text);
        }

        .project-form .form-control:focus,
        .project-form .form-select:focus {
            border-color: var(--acc);
            box-shadow: 0 0 0 3px rgba(200, 91, 34, .16);
            background: #fff;
        }

        .form-tip {
            font-size: 12px;
            color: var(--muted);
            margin-top: 12px;
        }

        .site-footer {
            background: #111B1D;
            color: rgba(255, 255, 255, .7);
            padding: 64px 0 20px;
            margin-top: auto;
        }

        .site-footer .footer-brand .brand-cn {
            color: #fff;
            font-size: 22px;
            margin-bottom: 6px;
            display: block;
            letter-spacing: .02em;
        }

        .site-footer .footer-brand .brand-en {
            margin-bottom: 4px;
            display: block;
            font-size: 11px;
            color: var(--acc);
            letter-spacing: .2em;
        }

        .site-footer .footer-brand p {
            color: rgba(255, 255, 255, .58);
            font-size: 14px;
            line-height: 2;
            margin: 18px 0 0;
            max-width: 320px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 18px;
            letter-spacing: .04em;
        }

        .footer-col ul li {
            margin-bottom: 9px;
        }

        .footer-col a {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            color: rgba(255, 255, 255, .62);
            font-size: 14px;
            line-height: 1.9;
            min-height: 28px;
            vertical-align: middle;
        }

        .footer-col a:hover {
            color: #fff;
        }

        .footer-col i {
            font-size: 10px;
            color: var(--acc);
            margin-top: 1px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .12);
            margin-top: 46px;
            padding-top: 22px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px 28px;
            justify-content: space-between;
            font-size: 13px;
            color: rgba(255, 255, 255, .45);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, .58);
        }

        .footer-bottom a:hover {
            color: var(--acc);
        }

        @media (max-width: 1199.98px) {
            .tech-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .tech-card {
                min-height: 0;
            }
        }

        @media (max-width: 991.98px) {
            .sidebar {
                width: 100%;
                height: 60px;
                bottom: auto;
                border-right: 0;
                border-bottom: 1px solid rgba(255, 255, 255, .08);
                background: var(--ink);
            }

            .sidebar-inner {
                height: 60px;
                flex-direction: row;
                align-items: center;
                border-right: 0;
            }

            .brand-block {
                width: 100%;
                height: 60px;
                min-height: 60px;
                padding: 0 18px;
                border-bottom: 0;
            }

            .brand-cn {
                font-size: 18px;
            }

            .menu-toggle {
                display: flex;
            }

            .sidebar-body {
                position: fixed;
                top: 60px;
                bottom: 0;
                left: 0;
                width: min(330px, 86vw);
                background: var(--ink);
                flex-direction: column;
                align-items: stretch;
                padding: 18px 18px 24px;
                z-index: 1045;
                transform: translateX(-105%);
                transition: transform .3s ease;
                box-shadow: 14px 0 34px rgba(0, 0, 0, .22);
            }

            .sidebar.open .sidebar-body {
                transform: none;
            }

            .side-foot {
                margin-top: 24px;
            }

            .sidebar.open .sidebar-mask {
                display: block;
            }

            .sidebar-mask {
                display: none;
                position: fixed;
                inset: 60px 0 0 0;
                background: rgba(0, 0, 0, .45);
                border: 0;
                z-index: 1041;
                cursor: pointer;
            }

            .main-content {
                margin-left: 0;
                padding-top: 0;
            }

            .category-hero {
                padding-top: 66px;
            }

            .scene-sidebar {
                position: relative;
                top: auto;
                margin-bottom: 36px;
            }
        }

        @media (max-width: 767.98px) {
            body {
                font-size: 15px;
            }

            .scene-card-main {
                padding: 26px 22px;
            }

            .tech-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .tech-card {
                padding: 20px 16px;
            }

            .tech-card h4 {
                font-size: 16px;
            }

            .process-step {
                padding-left: 0;
                padding-top: 58px;
            }

            .process-step .step-no {
                top: 0;
            }

            .cta-box {
                padding: 28px 22px;
            }

            .footer-bottom {
                flex-direction: column;
                gap: 8px;
            }

            .section-head-inline {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 575.98px) {
            .category-hero h1 {
                font-size: 40px;
            }

            .category-hero .lead {
                font-size: 15px;
            }

            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }

            .tech-grid {
                grid-template-columns: 1fr;
            }

            .footer-bottom {
                align-items: flex-start;
            }

            .container-page {
                padding-left: 18px;
                padding-right: 18px;
            }

            .brand-en {
                font-size: 10px;
            }

            .brand-cn {
                font-size: 16px;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: .01ms !important;
                transition-duration: .01ms !important;
                scroll-behavior: auto !important;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #C85B22;
            --primary-dark: #A94B1B;
            --secondary: #1D4E52;
            --ink: #10191B;
            --darkbg: #142426;
            --bodybg: #F5F4F0;
            --surface: #FFFFFF;
            --text: #1E2B2C;
            --muted: #6A7678;
            --line: #D7D3CC;
            --line-light: #E9E5DE;
            --radius: 8px;
            --radius-btn: 4px;
            --shadow-sm: 0 2px 10px rgba(16, 25, 27, .06);
            --shadow-md: 0 14px 30px rgba(16, 25, 27, .14);
            --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            --font-num: "Barlow Condensed", "DIN Alternate", "Arial Narrow", sans-serif;
            --ease: .25s ease;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text);
            background: var(--ink);
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--ease), background var(--ease), border-color var(--ease), transform var(--ease), box-shadow var(--ease);
        }

        img {
            max-width: 100%;
            height: auto;
        }

        button,
        input,
        textarea {
            font-family: inherit;
        }

        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
        }

        .page-shell {
            display: flex;
            align-items: flex-start;
            min-height: 100vh;
        }

        .site-aside {
            width: 280px;
            position: fixed;
            inset: 0 auto 0 0;
            z-index: 1050;
            display: flex;
            flex-direction: column;
            background: var(--ink);
            color: #FFFFFF;
            border-right: 1px solid rgba(255, 255, 255, .07);
        }

        .brand-block {
            padding: 32px 30px 26px;
            border-bottom: 1px solid rgba(255, 255, 255, .09);
        }

        .brand-link {
            display: inline-block;
        }

        .brand-en {
            display: block;
            font-family: var(--font-num);
            font-size: 11px;
            font-weight: 700;
            letter-spacing: .16em;
            color: var(--primary);
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .brand-cn {
            display: block;
            font-size: 24px;
            font-weight: 700;
            color: #FFFFFF;
            letter-spacing: .03em;
            line-height: 1.2;
        }

        .side-nav {
            flex: 1;
            padding-top: 18px;
        }

        .side-nav ul {
            list-style: none;
            padding: 0 16px;
        }

        .side-nav li {
            margin-bottom: 6px;
        }

        .side-nav a {
            position: relative;
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 14px 18px 14px 16px;
            color: rgba(255, 255, 255, .64);
            font-size: 17px;
            border-radius: var(--radius-btn);
            transition: background var(--ease), color var(--ease);
        }

        .side-nav a.current {
            color: #FFFFFF;
            background: rgba(200, 91, 34, .12);
        }

        .side-nav a.current::before {
            content: "";
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 3px;
            height: 24px;
            border-radius: 4px;
            background: var(--primary);
        }

        .side-nav a:hover {
            color: #FFFFFF;
            background: rgba(255, 255, 255, .04);
        }

        .side-nav .nav-num {
            width: 28px;
            font-family: var(--font-num);
            font-size: 12px;
            letter-spacing: .1em;
            color: rgba(200, 91, 34, .92);
        }

        .side-contact {
            margin: 18px 26px 24px;
            padding-top: 18px;
            border-top: 1px solid rgba(255, 255, 255, .09);
            color: rgba(255, 255, 255, .46);
            font-size: 13px;
        }

        .side-contact .contact-label {
            display: block;
            color: rgba(255, 255, 255, .82);
            font-weight: 600;
            margin-bottom: 8px;
        }

        .side-contact a {
            display: block;
            color: rgba(255, 255, 255, .58);
            margin-bottom: 2px;
            transition: color var(--ease);
        }

        .side-contact a:hover {
            color: var(--primary);
        }

        .main-area {
            width: calc(100% - 280px);
            margin-left: 280px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            background: var(--bodybg);
        }

        .site-footer {
            background: #0B1315;
            color: rgba(255, 255, 255, .72);
            padding: 68px 0 26px;
            margin-top: auto;
        }

        .footer-brand .brand-en {
            color: var(--primary);
            margin-bottom: 8px;
        }

        .footer-brand .brand-cn {
            font-size: 22px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.85;
            color: rgba(255, 255, 255, .6);
            max-width: 340px;
            margin-top: 18px;
        }

        .footer-col h4 {
            color: #FFFFFF;
            font-size: 15px;
            font-weight: 600;
            letter-spacing: .06em;
            margin-bottom: 16px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col ul li a {
            display: flex;
            align-items: center;
            gap: 8px;
            min-height: 40px;
            color: rgba(255, 255, 255, .58);
            font-size: 14px;
            transition: color var(--ease), transform var(--ease);
        }

        .footer-col ul li a i {
            font-size: 11px;
            color: var(--primary);
            margin-right: 2px;
        }

        .footer-col ul li a:hover {
            color: #FFFFFF;
            transform: translateX(3px);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .09);
            margin-top: 54px;
            padding-top: 22px;
            font-size: 13px;
            color: rgba(255, 255, 255, .4);
        }

        .mobile-header,
        .mobile-drawer,
        .drawer-overlay {
            display: none;
        }

        .news-hero {
            position: relative;
            background: linear-gradient(108deg, rgba(12, 27, 28, .98) 10%, rgba(16, 25, 27, .92) 56%, rgba(16, 25, 27, .76) 100%), url("/assets/images/backpic/back-1.png") center / cover no-repeat;
            color: #FFFFFF;
            border-bottom: 1px solid rgba(255, 255, 255, .06);
        }

        .news-hero .container-fluid {
            max-width: 1260px;
            margin: 0 auto;
            padding: 112px 64px 84px;
        }

        .breadcrumb-light {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: rgba(255, 255, 255, .5);
            margin-bottom: 48px;
        }

        .breadcrumb-light a {
            color: rgba(255, 255, 255, .68);
            transition: color var(--ease);
        }

        .breadcrumb-light a:hover {
            color: var(--primary);
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.1fr .9fr;
            gap: 56px;
            align-items: center;
        }

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-family: var(--font-num);
            font-size: 13px;
            font-weight: 700;
            letter-spacing: .18em;
            text-transform: uppercase;
            color: var(--primary);
        }

        .eyebrow::before {
            content: "";
            width: 8px;
            height: 8px;
            background: var(--primary);
            transform: rotate(45deg);
        }

        .news-hero h1 {
            font-size: 72px;
            font-weight: 700;
            line-height: 1.12;
            margin: 26px 0 24px;
            letter-spacing: .03em;
        }

        .news-hero .lead-text {
            max-width: 620px;
            font-size: 17px;
            line-height: 1.9;
            color: rgba(255, 255, 255, .78);
            margin-bottom: 38px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }

        .btn-copper,
        .btn-ghost-light,
        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            min-height: 48px;
            padding: 0 26px;
            font-size: 15px;
            font-weight: 600;
            border-radius: var(--radius-btn);
            border: 1px solid transparent;
            transition: all var(--ease);
        }

        .btn-copper {
            color: #FFFFFF;
            background: var(--primary);
            border-color: var(--primary);
        }

        .btn-copper:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            transform: translateY(-2px);
        }

        .btn-ghost-light {
            color: #FFFFFF;
            background: transparent;
            border-color: rgba(255, 255, 255, .45);
        }

        .btn-ghost-light:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-2px);
        }

        .btn-outline-dark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 44px;
            padding: 0 22px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            border: 1px solid #C5C1B8;
            border-radius: var(--radius-btn);
            transition: all var(--ease);
        }

        .btn-outline-dark:hover {
            color: var(--primary);
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        .btn-copper i,
        .btn-ghost-light i,
        .btn-outline-dark i {
            font-size: 13px;
            transition: transform var(--ease);
        }

        .btn-copper:hover i,
        .btn-ghost-light:hover i,
        .btn-outline-dark:hover i {
            transform: translateX(4px);
        }

        .hero-media {
            position: relative;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: var(--shadow-md);
            border: 1px solid rgba(255, 255, 255, .14);
        }

        .hero-media::after {
            content: "";
            display: block;
            padding-bottom: 78%;
        }

        .hero-media img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .content-wrap,
        .accordion-wrap {
            max-width: 1260px;
            margin: 0 auto;
            padding: 96px 64px;
        }

        .section-head {
            display: flex;
            justify-content: space-between;
            align-items: flex-end;
            gap: 30px;
            margin-bottom: 44px;
        }

        .section-head h2,
        .content-title h2 {
            font-size: 40px;
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: .01em;
            margin: 16px 0 12px;
        }

        .section-head p,
        .content-title p {
            color: var(--muted);
            max-width: 620px;
            font-size: 16px;
        }

        .editorial-section {
            background: var(--bodybg);
        }

        .editorial-grid {
            display: grid;
            grid-template-columns: repeat(12, 1fr);
            gap: 32px;
            margin-top: 8px;
        }

        .editorial-main {
            grid-column: span 7;
        }

        .editorial-note {
            grid-column: span 5;
            background: var(--secondary);
            color: #FFFFFF;
            border-radius: 10px;
            padding: 40px 36px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .editorial-note .note-label {
            font-family: var(--font-num);
            letter-spacing: .18em;
            font-size: 12px;
            color: rgba(255, 255, 255, .58);
            margin-bottom: 16px;
        }

        .editorial-note h3 {
            font-size: 27px;
            font-weight: 700;
            line-height: 1.45;
            margin-bottom: 18px;
        }

        .editorial-note p {
            font-size: 15px;
            line-height: 1.9;
            color: rgba(255, 255, 255, .76);
        }

        .note-tags {
            list-style: none;
            padding: 0;
            margin: 24px 0 0;
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .note-tags li {
            font-size: 13px;
            line-height: 1;
            padding: 8px 12px;
            border: 1px solid rgba(255, 255, 255, .28);
            border-radius: 50px;
            color: rgba(255, 255, 255, .82);
        }

        .feature-card {
            position: relative;
            display: block;
            height: 100%;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--ease);
        }

        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary);
        }

        .feature-media {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
        }

        .feature-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
        }

        .feature-card:hover .feature-media img {
            transform: scale(1.03);
        }

        .feature-content {
            padding: 28px 30px 30px;
        }

        .card-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 14px;
            margin-bottom: 16px;
        }

        .tag {
            display: inline-block;
            padding: 5px 12px;
            font-size: 12px;
            border: 1px solid rgba(200, 91, 34, .4);
            color: var(--primary);
            border-radius: 50px;
            line-height: 1.4;
        }

        .card-meta .date {
            font-size: 13px;
            color: var(--muted);
        }

        .feature-content h3 {
            font-size: 24px;
            line-height: 1.5;
            font-weight: 700;
            margin-bottom: 14px;
            letter-spacing: .01em;
        }

        .feature-content p {
            color: var(--muted);
            font-size: 15px;
            line-height: 1.85;
            margin-bottom: 22px;
        }

        .read-more {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            color: var(--primary);
            transition: gap var(--ease);
        }

        .read-more i {
            font-size: 13px;
        }

        .feature-card:hover .read-more {
            gap: 12px;
        }

        .editorial-bottom-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            margin-top: 28px;
        }

        .mini-card {
            display: flex;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--ease);
        }

        .mini-card:hover {
            transform: translateY(-3px);
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
        }

        .mini-card .mini-media {
            width: 38%;
            min-height: 170px;
            overflow: hidden;
        }

        .mini-card .mini-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
        }

        .mini-card:hover .mini-media img {
            transform: scale(1.05);
        }

        .mini-card .mini-body {
            flex: 1;
            padding: 24px 22px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .mini-card .mini-body .card-meta {
            margin-bottom: 10px;
        }

        .mini-card .mini-body h3 {
            font-size: 17px;
            line-height: 1.55;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .mini-card .mini-body p {
            color: var(--muted);
            font-size: 13px;
            line-height: 1.7;
            margin-bottom: 14px;
        }

        .topic-section {
            background: var(--surface);
            border-top: 1px solid var(--line-light);
            border-bottom: 1px solid var(--line-light);
        }

        .topic-grid {
            display: grid;
            grid-template-columns: .9fr 1.1fr;
            gap: 56px;
        }

        .topic-intro p {
            color: var(--muted);
            font-size: 16px;
        }

        .topic-intro .intro-quote {
            margin-top: 28px;
            padding: 20px 0 0;
            border-top: 1px solid var(--line-light);
            font-size: 15px;
            line-height: 1.9;
            color: var(--text);
        }

        .topic-list {
            border-top: 1px solid var(--line-light);
        }

        .topic-item {
            display: grid;
            grid-template-columns: 70px 1fr 36px;
            align-items: center;
            gap: 16px;
            padding: 24px 0;
            border-bottom: 1px solid var(--line-light);
            transition: padding-left var(--ease), background var(--ease);
        }

        .topic-item:hover {
            padding-left: 12px;
        }

        .topic-index {
            font-family: var(--font-num);
            font-size: 15px;
            color: var(--secondary);
            font-weight: 700;
            letter-spacing: .1em;
        }

        .topic-main {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .topic-title {
            font-size: 20px;
            font-weight: 700;
            line-height: 1.5;
        }

        .topic-text {
            color: var(--muted);
            font-size: 14px;
            line-height: 1.75;
        }

        .topic-arrow {
            width: 34px;
            height: 34px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            border: 1px solid rgba(200, 91, 34, .35);
            border-radius: 50%;
            transition: transform var(--ease), background var(--ease), color var(--ease);
        }

        .topic-item:hover .topic-arrow {
            transform: rotate(-45deg);
            background: var(--primary);
            color: #FFFFFF;
        }

        .faq-section {
            background: var(--bodybg);
        }

        .faq-inner {
            max-width: 900px;
            margin: 0 auto;
        }

        .faq-inner .section-head {
            display: block;
            margin-bottom: 36px;
        }

        .accordion {
            border-top: 1px solid var(--line);
        }

        .accordion-item {
            background: transparent;
            border: 0;
            border-bottom: 1px solid var(--line);
            border-radius: 0 !important;
        }

        .accordion-button {
            background: transparent;
            box-shadow: none;
            border: 0;
            padding: 24px 12px 24px 0;
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }

        .accordion-button:not(.collapsed) {
            color: var(--text);
            background: transparent;
            box-shadow: none;
        }

        .accordion-button::after {
            display: none;
        }

        .faq-icon {
            width: 32px;
            height: 32px;
            border: 1px solid #BDB9B1;
            color: var(--text);
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 400;
            flex-shrink: 0;
            transition: transform .3s ease, background .3s ease, color .3s ease, border-color .3s ease;
        }

        .accordion-button:not(.collapsed) .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            border-color: var(--primary);
            color: #FFFFFF;
        }

        .accordion-body {
            padding: 0 52px 26px 12px;
            color: var(--muted);
            font-size: 15px;
            line-height: 1.9;
        }

        .cta-strip {
            background: #E8EDE8;
            border-top: 1px solid #D8DED8;
        }

        .cta-panel {
            max-width: 1260px;
            margin: 0 auto;
            padding: 84px 64px;
            background: var(--ink);
            color: #FFFFFF;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            margin-top: -40px;
            margin-bottom: -40px;
            box-shadow: var(--shadow-md);
        }

        .cta-panel h2 {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.45;
            margin-bottom: 12px;
        }

        .cta-panel p {
            color: rgba(255, 255, 255, .7);
            font-size: 15px;
            max-width: 600px;
            line-height: 1.85;
        }

        .cta-panel .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            flex-shrink: 0;
        }

        @media (max-width: 991.98px) {
            .site-aside {
                display: none;
            }

            .main-area {
                width: 100%;
                margin-left: 0;
            }

            .mobile-header {
                display: flex;
                height: 64px;
                background: var(--ink);
                color: #FFFFFF;
                align-items: center;
                justify-content: space-between;
                padding: 0 24px;
                position: sticky;
                top: 0;
                z-index: 1060;
            }

            .mobile-brand .brand-en {
                font-size: 10px;
                line-height: 1.2;
            }

            .mobile-brand .brand-cn {
                font-size: 18px;
                line-height: 1.2;
            }

            .menu-toggle {
                display: inline-flex;
                width: 44px;
                height: 44px;
                align-items: center;
                justify-content: center;
                background: transparent;
                border: 1px solid rgba(255, 255, 255, .24);
                border-radius: 6px;
                color: #FFFFFF;
                cursor: pointer;
            }

            .menu-toggle:hover {
                border-color: var(--primary);
            }

            .mobile-drawer {
                display: flex;
                position: fixed;
                inset: 0 0 0 auto;
                width: min(420px, 100%);
                background: var(--ink);
                color: #FFFFFF;
                flex-direction: column;
                z-index: 1080;
                transform: translateX(110%);
                transition: transform .35s ease;
                padding: 28px 28px 48px;
                overflow-y: auto;
            }

            body.nav-open .mobile-drawer {
                transform: translateX(0);
            }

            .drawer-overlay {
                display: block;
                position: fixed;
                inset: 0;
                background: rgba(0, 0, 0, .55);
                z-index: 1070;
                opacity: 0;
                visibility: hidden;
                transition: opacity .3s ease;
                pointer-events: none;
            }

            body.nav-open .drawer-overlay {
                opacity: 1;
                visibility: visible;
                pointer-events: auto;
            }

            .drawer-head {
                display: flex;
                align-items: center;
                justify-content: space-between;
                margin-bottom: 32px;
            }

            .drawer-close {
                width: 42px;
                height: 42px;
                background: transparent;
                border: 1px solid rgba(255, 255, 255, .24);
                color: #FFF;
                border-radius: 6px;
                font-size: 18px;
                cursor: pointer;
            }

            .drawer-close:hover {
                border-color: var(--primary);
                color: var(--primary);
            }

            .mobile-nav ul {
                list-style: none;
                padding: 0;
                margin: 0;
            }

            .mobile-nav li {
                border-bottom: 1px solid rgba(255, 255, 255, .1);
            }

            .mobile-nav a {
                display: flex;
                align-items: center;
                gap: 16px;
                padding: 18px 6px;
                color: rgba(255, 255, 255, .72);
                font-size: 18px;
                transition: color var(--ease), padding-left var(--ease);
            }

            .mobile-nav a.current {
                color: #FFFFFF;
                padding-left: 12px;
                border-left: 3px solid var(--primary);
                background: rgba(255, 255, 255, .03);
            }

            .mobile-nav .nav-num {
                font-family: var(--font-num);
                font-size: 12px;
                color: var(--primary);
                width: 28px;
            }

            .drawer-contact {
                margin-top: 40px;
                padding-top: 24px;
                border-top: 1px solid rgba(255, 255, 255, .1);
                color: rgba(255, 255, 255, .48);
                font-size: 14px;
            }

            .news-hero .container-fluid {
                padding: 76px 30px 64px;
            }

            .news-hero h1 {
                font-size: 52px;
            }

            .hero-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }

            .content-wrap,
            .accordion-wrap {
                padding: 72px 30px;
            }

            .editorial-main {
                grid-column: span 12;
            }

            .editorial-note {
                grid-column: span 12;
            }

            .topic-grid,
            .cta-panel {
                grid-template-columns: 1fr;
                gap: 36px;
                display: block;
            }

            .cta-panel {
                margin: 0;
                padding: 56px 40px;
            }

            .cta-actions {
                margin-top: 22px;
            }
        }

        @media (max-width: 767.98px) {
            .news-hero .container-fluid {
                padding: 56px 22px 48px;
            }

            .breadcrumb-light {
                margin-bottom: 32px;
            }

            .hero-grid {
                grid-template-columns: 1fr;
            }

            .hero-media {
                display: none;
            }

            .news-hero h1 {
                font-size: 44px;
            }

            .news-hero .lead-text {
                font-size: 15px;
            }

            .content-wrap,
            .accordion-wrap {
                padding: 60px 20px;
            }

            .section-head {
                display: block;
            }

            .section-head h2,
            .content-title h2 {
                font-size: 30px;
            }

            .editorial-grid,
            .editorial-bottom-grid {
                grid-template-columns: 1fr;
            }

            .feature-content h3 {
                font-size: 20px;
            }

            .feature-content {
                padding: 22px;
            }

            .mini-card {
                flex-direction: column;
            }

            .mini-card .mini-media {
                width: 100%;
                min-height: auto;
                aspect-ratio: 16 / 9;
            }

            .topic-grid {
                gap: 0;
            }

            .topic-list {
                margin-top: 20px;
            }

            .topic-item {
                grid-template-columns: 48px 1fr 34px;
                padding: 20px 0;
            }

            .topic-title {
                font-size: 17px;
            }

            .accordion-body {
                padding-right: 8px;
            }

            .cta-panel {
                padding: 40px 24px;
                border-radius: 10px;
            }

            .cta-panel h2 {
                font-size: 24px;
            }

            .faq-inner .section-head {
                margin-bottom: 24px;
            }

            .footer-bottom {
                text-align: center;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: .01ms !important;
                transition-duration: .01ms !important;
                scroll-behavior: auto !important;
            }
        }

/* roulang page: category4 */
:root{
  --ink:#10191B;
  --ink-2:#111B1C;
  --deep:#1D4E52;
  --deep-2:#163D40;
  --primary:#C85B22;
  --primary-hover:#A94D1B;
  --paper:#F5F4F0;
  --card:#FFFFFF;
  --text:#1E2B2C;
  --text-soft:#5B6A6B;
  --text-light:#8B9898;
  --border:#D9D5CC;
  --border-light:#E8E4DC;
  --line-deep:rgba(255,255,255,.14);
  --radius:8px;
  --radius-sm:5px;
  --shadow:0 8px 24px rgba(16,25,27,.07);
  --shadow-card:0 2px 12px rgba(16,25,27,.05);
  --ease:all .28s ease;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Helvetica Neue",Arial,sans-serif;
  background:var(--paper);
  color:var(--text);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{text-decoration:none;color:inherit;transition:var(--ease)}
button,input,textarea,select{font-family:inherit}
h1,h2,h3,h4,h5{
  font-weight:700;
  line-height:1.25;
  color:var(--text);
  margin:0 0 1.2rem;
}
.container{max-width:1320px}
.container-wide{max-width:1320px}
.text-major{color:var(--primary)!important}
.bg-deep{background:var(--ink)!important}
.bg-primary{background:var(--primary)!important}

/* side framework */
.layout-sidebar{
  position:fixed;
  top:0;bottom:0;left:0;
  width:270px;
  background:var(--ink);
  color:rgba(255,255,255,.82);
  display:flex;
  flex-direction:column;
  z-index:1080;
  overflow-y:auto;
  padding:26px 0 22px;
}
.brand-block{
  display:block;
  padding:0 24px 24px;
  margin-bottom:12px;
  border-bottom:1px solid rgba(255,255,255,.09);
}
.brand-en{
  font-family:"Barlow Condensed","DIN Alternate",Arial,sans-serif;
  font-size:12px;
  letter-spacing:.18em;
  color:var(--primary);
  text-transform:uppercase;
  display:block;
  line-height:1.4;
  margin-bottom:6px;
}
.brand-cn{
  font-size:21px;
  font-weight:700;
  color:#fff;
  letter-spacing:.02em;
  line-height:1.3;
}
.brand-block .brand-cn span{display:block;font-size:14px;font-weight:400;color:rgba(255,255,255,.55);margin-top:4px;letter-spacing:.1em}

.desktop-nav ul{
  list-style:none;
  margin:0;
  padding:8px 16px;
}
.desktop-nav li{margin-bottom:2px}
.desktop-nav a{
  position:relative;
  display:flex;
  align-items:center;
  gap:14px;
  color:rgba(255,255,255,.58);
  font-size:15px;
  padding:13px 20px;
  border-left:3px solid transparent;
  border-radius:0 6px 6px 0;
  transition:var(--ease);
}
.desktop-nav a:hover{
  color:rgba(255,255,255,.92);
  background:rgba(200,91,34,.08);
  border-left-color:rgba(200,91,34,.5);
}
.desktop-nav a.current{
  color:#ffffff;
  background:rgba(200,91,34,.1);
  border-left:3px solid var(--primary);
}
.nav-num{
  font-family:"Barlow Condensed","DIN Alternate",sans-serif;
  font-size:12px;
  letter-spacing:.05em;
  color:rgba(200,91,34,.85);
  min-width:24px;
  line-height:1;
}
.desktop-nav a.current .nav-num{color:var(--primary)}
.desktop-nav a span:not(.nav-num){letter-spacing:.03em}
.side-foot{
  margin-top:auto;
  padding:26px 30px 0;
  font-size:13px;
  color:rgba(255,255,255,.4);
  border-top:1px solid rgba(255,255,255,.08);
}
.side-foot .foot-title{
  color:rgba(255,255,255,.68);
  margin-bottom:16px;
  font-size:13px;
  letter-spacing:.08em;
}
.side-foot .contact-item{display:flex;align-items:flex-start;gap:10px;margin-bottom:10px;line-height:1.6}
.side-foot .contact-item i{color:rgba(200,91,34,.8);margin-top:4px;font-size:12px}

/* main layout */
.main-area{
  width:100%;
  margin-left:270px;
  min-height:100vh;
}
.content-shell{
  overflow:hidden;
}
.section-block{
  padding:96px 0;
}
.section-inner{
  max-width:1200px;
  margin:0 auto;
  padding:0 30px;
}
@media(max-width:1599.98px){
  .section-inner{max-width:1150px}
}
/* mobile header */
.mobile-header{
  display:none;
  position:sticky;
  top:0;
  z-index:1070;
  background:var(--ink);
  padding:0 18px;
  min-height:60px;
  color:#fff;
  border-bottom:1px solid rgba(255,255,255,.1);
}
.mobile-header .mobile-header-inner{
  display:flex;
  justify-content:space-between;
  align-items:center;
  width:100%;
  max-width:100%;
  height:60px;
}
.mobile-header .mobile-brand{
  color:#fff;
  font-size:17px;
  font-weight:700;
  letter-spacing:.01em;
  display:flex;
  flex-direction:column;
  line-height:1.2;
}
.mobile-header .mobile-brand small{
  color:var(--primary);
  font-family:"Barlow Condensed",sans-serif;
  font-size:10px;
  letter-spacing:.16em;
  text-transform:uppercase;
  line-height:1.3;
}
.hamburger-btn{
  border:1px solid rgba(255,255,255,.14);
  background:transparent;
  width:42px;
  height:42px;
  border-radius:var(--radius-sm);
  color:#fff;
  font-size:19px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  transition:var(--ease);
}
.hamburger-btn:hover{background:rgba(200,91,34,.2);border-color:var(--primary)}
.offcanvas-mobile{
  background:var(--ink);
  color:#fff;
  width:300px;
  max-width:85%;
}
.offcanvas-mobile .offcanvas-header{
  padding:22px 18px;
  border-bottom:1px solid rgba(255,255,255,.1);
  background:var(--ink);
  color:#fff;
}
.offcanvas-mobile .offcanvas-body{
  padding:22px 18px;
  background:var(--ink);
  color:#fff;
}
.mobile-menu-list{list-style:none;margin:0 0 30px;padding:0}
.mobile-menu-list li{margin-bottom:8px}
.mobile-menu-list a{
  display:flex;
  align-items:center;
  gap:14px;
  color:rgba(255,255,255,.64);
  font-size:17px;
  padding:13px 14px;
  border-left:3px solid transparent;
  border-radius:6px;
}
.mobile-menu-list li.current a,
.mobile-menu-list a:hover{
  color:#fff;
  border-left-color:var(--primary);
  background:rgba(200,91,34,.16);
}
.mobile-menu-list .nav-num{
  font-family:"Barlow Condensed",sans-serif;
  color:rgba(200,91,34,.85);
  font-size:12px;
  min-width:26px;
}
.mobile-menu-foot{color:rgba(255,255,255,.42);font-size:13px;border-top:1px solid rgba(255,255,255,.08);padding-top:20px}
.mobile-menu-foot .co-item{margin-bottom:9px;display:flex;gap:9px;align-items:center;color:rgba(255,255,255,.42)}
.mobile-menu-foot i{color:rgba(200,91,34,.8)}

/* hero */
.cat-hero{
  position:relative;
  padding:128px 0 100px;
  background-color:var(--ink);
  background-image:linear-gradient(100deg,rgba(16,25,27,.98),rgba(16,25,27,.72)),url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center 62%;
  color:#fff;
  min-height:430px;
  display:flex;
  align-items:center;
}
.cat-hero .container-cat{
  max-width:1200px;
  margin:0 auto;
  padding:0 32px;
}
.cat-hero .hero-tag{
  display:inline-flex;
  align-items:center;
  border:1px solid rgba(255,255,255,.2);
  border-radius:100px;
  padding:5px 14px;
  font-size:13px;
  color:rgba(255,255,255,.8);
  margin-bottom:26px;
  letter-spacing:.08em;
}
.cat-hero .hero-tag span{color:var(--primary);margin-right:6px}
.cat-hero h1{
  color:#fff;
  font-size:66px;
  line-height:1.08;
  letter-spacing:.02em;
  margin-bottom:26px;
  font-weight:800;
}
.cat-hero .hero-desc{
  font-size:17px;
  line-height:2;
  color:rgba(255,255,255,.72);
  max-width:680px;
  margin-bottom:36px;
}
.hero-crumb{
  display:flex;
  align-items:center;
  color:rgba(255,255,255,.48);
  font-size:13px;
  margin-bottom:26px;
  letter-spacing:.02em;
}
.hero-crumb a{color:rgba(255,255,255,.58)}
.hero-crumb a:hover{color:var(--primary)}
.hero-crumb .divider-symbol{padding:0 10px;color:rgba(255,255,255,.3)}
.hero-crumb .current-crumb{color:#fff}

/* buttons */
.btn-anbo{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 26px;
  border-radius:5px;
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:var(--ease);
  line-height:1.2;
}
.btn-primary-anbo{
  background:var(--primary);
  color:#fff;
  border-color:var(--primary);
}
.btn-primary-anbo:hover{
  background:var(--primary-hover);
  color:#fff;
  border-color:var(--primary-hover);
  transform:translateY(-2px);
  box-shadow:0 10px 18px rgba(200,91,34,.28);
}
.btn-outline-invert{
  background:transparent;
  color:#fff;
  border-color:rgba(255,255,255,.45);
}
.btn-outline-invert:hover{
  background:rgba(255,255,255,.08);
  border-color:#fff;
  color:#fff;
  transform:translateY(-2px);
}
.btn-dark-anbo{
  background:var(--ink);
  color:#fff;
  border-color:var(--ink);
}
.btn-dark-anbo:hover{
  background:#2C3A3B;
  color:#fff;
  transform:translateY(-2px);
  box-shadow:0 14px 24px rgba(16,25,27,.14);
}
.btn-outline-dark{
  background:transparent;
  color:var(--text);
  border-color:var(--border);
}
.btn-outline-dark:hover{
  border-color:var(--primary);
  color:var(--primary);
  transform:translateY(-2px);
}
.btn-anbo i{transition:transform .25s ease}
.btn-anbo:hover i{transform:translateX(4px)}

/* section heading */
.sec-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  margin-bottom:46px;
  gap:20px;
}
.sec-tag{
  font-size:13px;
  letter-spacing:.18em;
  color:var(--primary);
  font-weight:600;
  text-transform:uppercase;
  display:block;
  margin-bottom:10px;
}
.sec-h2{
  font-size:40px;
  line-height:1.2;
  color:var(--text);
  margin-bottom:0;
  position:relative;
}
.sec-description{
  max-width:720px;
  color:var(--text-soft);
  font-size:16px;
  line-height:2;
  margin-top:14px;
}
.title-line{
  padding-left:0;
}
.title-line::before{
  content:"";
  display:inline-block;
  width:34px;
  height:4px;
  background:var(--primary);
  margin-right:14px;
  border-radius:20px;
}
/* intro section */
.about-intro{
  background:var(--paper);
}
.img-frame{
  position:relative;
  overflow:hidden;
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.img-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .45s ease;
}
.img-frame:hover img{transform:scale(1.02)}
.img-frame::after{
  content:"";
  position:absolute;
  inset:0;
  border:1px solid var(--primary);
  opacity:0;
  transition:.3s ease;
  border-radius:var(--radius);
}
.img-frame:hover::after{opacity:.8}
.about-intro .text-col p{
  color:var(--text-soft);
  font-size:16px;
  line-height:2;
  margin-bottom:1.4rem;
}
.text-feature-list{
  list-style:none;
  padding:0;
  margin:26px 0 0;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:13px;
}
.text-feature-list li{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:14px;
  color:var(--text);
  background:var(--card);
  padding:11px 15px;
  border-radius:6px;
  border:1px solid var(--border-light);
}
.text-feature-list i{color:var(--primary);font-size:13px}
.about-qc-badge{
  position:absolute;
  right:-10px;
  bottom:-10px;
  background:var(--deep);
  color:#fff;
  border-radius:var(--radius);
  padding:14px 18px;
  font-size:13px;
  letter-spacing:.08em;
}
.about-qc-badge strong{display:block;font-size:22px;line-height:1.4;color:#fff;font-family:"Barlow Condensed","DIN Alternate",sans-serif}

/* section 工程矩阵 */
.steps-board{
  background:var(--ink);
  color:rgba(255,255,255,.75);
  background-image:
      linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px),
      linear-gradient(rgba(255,255,255,.02) 1px,transparent 1px);
  background-size:48px 48px;
}
.steps-board .sec-h2{color:#fff}
.steps-board .sec-description{color:rgba(255,255,255,.6)}
.steps-board .sec-tag{color:var(--primary)}
.step-access-grid{
  display:grid;
  grid-template-columns:repeat(6,1fr);
  border:1px solid rgba(255,255,255,.12);
  border-radius:10px;
  overflow:hidden;
  background:rgba(255,255,255,.02);
}
.step-access-item{
  padding:28px 22px 24px;
  border-right:1px solid rgba(255,255,255,.1);
  min-height:180px;
  position:relative;
}
.step-access-item:last-child{border-right:none}
.step-access-item:hover{
  background:rgba(200,91,34,.1);
}
.hover-line{
  position:absolute;
  left:0;right:0;top:0;
  height:3px;
  background:var(--primary);
  transform:scaleX(0);
  transform-origin:left;
  transition:.35s ease;
}
.step-access-item:hover .hover-line{transform:scaleX(1)}
.step-num{
  font-family:"DIN Alternate","Barlow Condensed",sans-serif;
  color:var(--primary);
  font-size:14px;
  letter-spacing:.1em;
  margin-bottom:12px;
}
.step-access-item h3{
  color:#fff;
  font-size:18px;
  margin-bottom:10px;
}
.step-access-item p{
  margin:0;
  font-size:14px;
  line-height:1.9;
  color:rgba(255,255,255,.5);
}

/* support cards */
.support-section{background:#fff}
.support-card-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:28px;
}
.world-card{
  padding:30px 30px 28px;
  background:var(--card);
  border:1px solid var(--border-light);
  border-radius:var(--radius);
  box-shadow:var(--shadow-card);
  transition:var(--ease);
  position:relative;
}
.world-card::before{
  content:"";
  position:absolute;
  left:0;top:28px;bottom:28px;
  width:3px;
  background:var(--primary);
  border-radius:20px;
  opacity:0;
  transition:.3s ease;
}
.world-card:hover{
  transform:translateY(-4px);
  border-color:rgba(200,91,34,.45);
  box-shadow:0 12px 30px rgba(16,25,27,.08);
}
.world-card:hover::before{opacity:1}
.world-card .icon-box{
  width:48px;
  height:48px;
  display:flex;
  align-items:center;
  justify-content:center;
  background:rgba(29,78,82,.08);
  border-radius:10px;
  color:var(--deep);
  font-size:18px;
  margin-bottom:20px;
}
.world-card h3{
  font-size:19px;
  color:var(--text);
  margin-bottom:12px;
  padding-left:0;
}
.world-card p{
  color:var(--text-soft);
  font-size:15px;
  line-height:1.9;
  margin-bottom:20px;
}
.world-card .more-link{
  font-size:14px;
  font-weight:600;
  color:var(--primary);
  display:inline-flex;
  align-items:center;
  gap:8px;
}
.world-card .more-link i{font-size:12px;transition:transform .25s}
.world-card:hover .more-link i{transform:translateX(4px)}

/* value-principle timeline */
.principle-section{
  background:var(--paper);
}
.principle-list{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:0;
  margin:0;
  position:relative;
}
.principle-list::before{
  content:"";
  position:absolute;
  left:0;right:0;top:26px;
  height:2px;
  background:var(--border);
}
.principle-item{
  padding:0 30px 0 0;
}
.principle-item .dot{
  width:12px;
  height:12px;
  background:var(--card);
  border:3px solid var(--primary);
  border-radius:50%;
  position:relative;
  z-index:3;
}
.principle-item .dot-line{
  width:12px;height:12px;
  border-radius:50%;
  background:var(--card);
  border:3px solid var(--primary);
  margin-bottom:22px;
  position:relative;
  z-index:2;
}
.principle-item:nth-child(even) .dot-line{
  border-color:var(--deep);
}
.principle-item h3{
  font-size:18px;
  color:var(--text);
  margin-bottom:10px;
}
.principle-item p{
  color:var(--text-soft);
  font-size:14px;
  line-height:1.95;
  margin:0;
}

/* table */
.data-table-wrap{
  background:#fff;
  border:1px solid var(--border-light);
  border-radius:var(--radius);
  overflow:hidden;
  box-shadow:var(--shadow-card);
}
.process-table{
  width:100%;
  border-collapse:collapse;
  font-size:14.5px;
}
.process-table thead th{
  font-size:14px;
  color:var(--text);
  font-weight:600;
  padding:18px 20px;
  background:#FAF8F3;
  border-bottom:1px solid var(--border-light);
  letter-spacing:.02em;
}
.process-table tbody td{
  padding:19px 20px;
  border-bottom:1px solid var(--border-light);
  vertical-align:top;
  color:var(--text-soft);
  line-height:1.9;
}
.process-table tbody tr:last-child td{border-bottom:none}
.process-table tbody tr:hover{background:rgba(200,91,34,.04)}
.process-table .stage-name{
  color:var(--text);
  font-weight:600;
  white-space:nowrap;
}
.process-table .support-chip{
  display:inline-block;
  margin:3px 6px 3px 0;
  padding:3px 12px;
  border:1px solid var(--border-light);
  border-radius:100px;
  background:#fff;
  color:var(--text);
  font-size:13px;
}

/* faq page */
.faq-section{
  background:#fff;
}
.faq-layout{
  display:grid;
  grid-template-columns:1.1fr .9fr;
  gap:76px;
}
.faq-question-group h2{
  margin-bottom:28px;
  font-size:24px;
}
details.faq-row{
  border-bottom:1px solid var(--border-light);
}
details.faq-row summary{
  list-style:none;
  display:flex;
  justify-content:space-between;
  align-items:center;
  cursor:pointer;
  font-size:16px;
  font-weight:600;
  color:var(--text);
  padding:21px 6px;
  transition:.25s ease;
}
details.faq-row summary::-webkit-details-marker{display:none}
details.faq-row summary::after{
  content:"+";
  font-size:25px;
  font-weight:400;
  color:var(--primary);
  width:25px;
  line-height:1;
  text-align:center;
  transition:transform .3s ease;
  font-family:"DIN Alternate",sans-serif;
}
details.faq-row[open] summary::after{transform:rotate(45deg)}
details.faq-row summary:hover{color:var(--primary)}
details.faq-row p{
  color:var(--text-soft);
  font-size:15px;
  line-height:2;
  padding:0 12px 26px;
  margin:0;
}

/* contact side */
.contact-side-card{
  padding:2px 0;
}
.contact-side-inner{
  background:var(--paper);
  border:1px solid var(--border-light);
  border-radius:var(--radius);
  padding:38px 34px;
}
.contact-side-inner h3{font-size:22px;margin-bottom:8px}
.contact-side-inner > p{color:var(--text-soft);font-size:14px;line-height:1.9;margin-bottom:26px}
.contact-line-list li{
  display:flex;
  gap:15px;
  padding:14px 0;
  border-top:1px solid var(--border-light);
  color:var(--text-soft);
  font-size:15px;
  line-height:1.8;
}
.contact-line-list li:last-child{border-bottom:1px solid var(--border-light)}
.contact-icon-min{
  width:32px;height:32px;
  display:flex;
  align-items:center;
  justify-content:center;
  background:rgba(29,78,82,.1);
  color:var(--deep);
  border-radius:8px;
  margin-top:3px;
}
.contact-line-list .text-result strong{
  display:block;
  color:var(--text);
  font-weight:600;
  margin-bottom:4px;
}
.contact-note{
  font-size:13px;
  background:rgba(200,91,34,.08);
  border-radius:6px;
  padding:14px 16px;
  color:var(--text-soft);
  margin-top:26px;
  line-height:1.8;
}
.contact-note i{color:var(--primary);margin-right:7px}

/* forms */
.form-title-area{
  margin-bottom:28px;
}
.form-title-area h3{font-size:25px}
.form-title-area p{
  color:var(--text-soft);
  font-size:14px;
  margin:0;
}
.form-control-anbo,
.simple-form .form-control{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:6px;
  height:48px;
  font-size:15px;
  color:var(--text);
  padding:0 16px;
  transition:border .22s ease, box-shadow .22s ease;
}
.simple-form textarea.form-control{
  height:auto;
  padding:14px 16px;
  min-height:112px;
}
.simple-form .form-control:focus{
  border-color:var(--primary);
  box-shadow:0 0 0 .2rem rgba(200,91,34,.12);
  background:#fff;
  color:var(--text);
}
.simple-form label{
  font-size:14px;
  font-weight:600;
  color:var(--text);
  margin-bottom:7px;
}
.simple-form label small{font-weight:400;color:var(--text-light);margin-left:5px}
.form-select-anbo{
  appearance:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%235B6A6B' fill='none'/%3E%3C/svg%3E");
  background-repeat:no-repeat;
  background-position:right 16px center;
  cursor:pointer;
}

/* simple CTA */
.cta-ribbon{
  background:#fff;
}
.cta-box{
  background:var(--ink);
  border-radius:14px;
  position:relative;
  padding:62px 52px;
  color:#fff;
  overflow:hidden;
  background-image:url('/assets/images/backpic/back-3.png');
  background-size:cover;
  background-position:center;
  background-blend-mode:multiply;
  background-color:rgba(16,25,27,.85);
}
.cta-box h2{
  color:#fff;
  font-size:36px;
  line-height:1.35;
  margin:0 0 14px;
}
.cta-box p{
  color:rgba(255,255,255,.72);
  max-width:760px;
  margin:0;
  font-size:16px;
  line-height:1.9;
}
.cta-box::after{
  content:"";
  position:absolute;
  right:-60px;
  top:-60px;
  width:220px;
  height:220px;
  border-radius:50%;
  border:1px solid rgba(255,255,255,.1);
}
.cta-box .actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
}

/* footer full */
.site-footer{
  background:var(--ink-2);
  color:rgba(255,255,255,.7);
  padding:76px 0 0;
}
.site-footer .footer-brand{
  display:flex;
  flex-direction:column;
  margin-bottom:24px;
}
.site-footer .brand-cn{
  color:#fff;
  font-size:22px;
  font-weight:700;
  margin-top:6px;
  letter-spacing:.04em;
}
.footer-brand .brand-en{
  font-family:"Barlow Condensed","DIN Alternate",sans-serif;
  text-transform:uppercase;
  color:var(--primary);
  font-size:12px;
  letter-spacing:.16em;
}
.site-footer .footer-brand p{
  color:rgba(255,255,255,.45);
  font-size:14px;
  line-height:2;
  max-width:380px;
}
.footer-col h4{
  font-size:15px;
  font-weight:600;
  color:#fff;
  margin-bottom:20px;
  letter-spacing:.05em;
}
.footer-col ul{list-style:none;padding:0 0 0;margin:0}
.footer-col li{margin-bottom:11px}
.footer-col a{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:rgba(255,255,255,.48);
  font-size:14px;
  min-height:40px;
  line-height:1.4;
}
.footer-col a i{
  color:var(--primary);
  font-size:10px;
  transition:transform .25s;
}
.footer-col a:hover{color:#fff}
.footer-col a:hover i{transform:translateX(4px)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);
  margin-top:60px;
  padding:22px 0;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:8px 24px;
  font-size:14px;
  color:rgba(255,255,255,.36);
}
.footer-bottom a{color:rgba(255,255,255,.55)}
.footer-bottom a:hover{color:var(--primary)}
.footer-link-line a{position:relative;margin-left:20px}
.footer-link-line i{margin-right:5px;color:var(--primary)}

@media(max-width:1700px){
  .section-inner{padding:0 42px}
}
@media(max-width:1399px){
  .section-inner{max-width:1120px}
  .layout-sidebar{width:248px}
  .main-area{margin-left:248px}
  .cat-hero h1{font-size:58px}
  .sec-h2{font-size:35px}
}
@media(max-width:1199.98px){
  .step-access-grid{grid-template-columns:repeat(6,1fr)}
  .step-access-item{padding:22px 18px;min-height:auto}
  .step-access-item h3{font-size:16px}
  .support-card-grid{gap:20px}
  .world-card{padding:24px 22px}
  .principle-list{grid-template-columns:repeat(2,1fr);gap:36px 20px}
  .principle-list::before{display:none}
  .footer-bottom{flex-direction:column;justify-content:flex-start;gap:8px}
}
@media(max-width:991.98px){
  .layout-sidebar{display:none}
  .mobile-header{display:block}
  .main-area{margin-left:0}
  .cat-hero{padding:96px 0 72px;min-height:390px}
  .section-block{padding:78px 0}
  .section-inner{padding:0 24px}
  .container-cat{padding:0 24px}
  .step-access-grid{grid-template-columns:repeat(2,1fr)}
  .step-access-item{border-right:none;border-bottom:1px solid rgba(255,255,255,.08)}
  .step-access-item:nth-last-child(-n+2){border-bottom:none}
  .support-card-grid{grid-template-columns:repeat(2,1fr)}
  .about-intro .order-2{margin-top:50px}
  .faq-layout{grid-template-columns:1fr;gap:45px}
  .cta-box{padding:46px 32px}
  .cta-box h2{font-size:29px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .sec-h2{font-size:32px}
}
@media(max-width:767.98px){
  body{font-size:15px}
  .section-block{padding:68px 0}
  .section-inner{padding:0 20px}
  .cat-hero h1{font-size:44px}
  .mobile-header .mobile-brand{font-size:16px}
  .cat-hero .hero-desc{font-size:15px}
  .btn-anbo{height:45px;padding:0 21px;font-size:14px}
  .hero-actions{display:flex;flex-direction:column;align-items:flex-start;gap:12px}
  .support-card-grid{grid-template-columns:1fr}
  .principle-list{grid-template-columns:1fr}
  .step-access-grid{grid-template-columns:1fr}
  .step-access-item{border-right:none;border-bottom:1px solid rgba(255,255,255,.08);min-height:auto}
  .step-access-item:nth-last-child(2){border-bottom:1px solid rgba(255,255,255,.08)}
  .step-access-item:last-child{border-bottom:none}
  .process-table thead{display:none}
  .process-table,
  .process-table tbody,
  .process-table tr,
  .process-table td{
    display:block;
    width:100%;
  }
  .process-table tbody td{
    border-bottom:1px solid var(--border-light);
    padding:12px 16px;
  }
  .process-table tbody tr{
    border:1px solid var(--border-light);
    border-radius:8px;
    margin-bottom:14px;
    background:#fff;
  }
  .process-table tbody tr:hover{background:#fff}
  .process-table tbody tr td::before{
    content:attr(data-label);
    display:block;
    font-size:12px;
    color:var(--text-light);
    margin-bottom:4px;
    font-weight:500;
  }
  .process-table td.stage-name::before{content:""}
  .cta-box{padding:38px 22px;border-radius:10px}
  .cta-box .actions{flex-direction:column;width:100%}
  .cta-box .btn-anbo{width:100%}
  .text-feature-list{grid-template-columns:1fr}
  .about-qc-badge{right:0;bottom:0}
  .faq-layout{gap:36px}
  .contact-side-inner{padding:30px 20px}
  .contact-note{font-size:13px}
  .hero-crumb{font-size:12px}
  .site-footer .footer-bottom{flex-direction:column;align-items:flex-start}
  .footer-bottom{text-align:left}
}
@media(max-width:575.98px){
  .cat-hero h1{font-size:37px}
  .cat-hero{padding:76px 0 52px;min-height:340px}
  .hero-desc{line-height:1.8}
  .sec-head{flex-direction:column;align-items:flex-start}
  .sec-h2{font-size:27px}
  .sec-tag{font-size:12px}
  .container-cat{padding:0 18px}
  .section-inner{padding:0 18px}
  .section-block{padding:60px 0}
  .world-card{padding:24px 20px}
  .cta-box h2{font-size:25px}
  .form-control-anbo,.simple-form .form-control{font-size:14px}
  .site-footer{padding-top:56px}
  .site-footer .footer-brand{margin-bottom:16px}
}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{
    transition:none!important;
    animation:none!important;
  }
  html{scroll-behavior:auto}
}