/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #1E4D3A;
            --primary-dark: #163A2B;
            --primary-light: rgba(30, 77, 58, 0.1);
            --accent: #D4953A;
            --accent-hover: #B87D2E;
            --accent-light: rgba(212, 149, 58, 0.2);
            --bg-warm: #F7F4EE;
            --bg-dark: #162B21;
            --bg-dark2: #1a3327;
            --text-primary: #1A1A1A;
            --text-secondary: #5A5A5A;
            --text-muted: #9A9A9A;
            --text-light: #C8C8C8;
            --text-light-muted: #7A7A7A;
            --border-light: #EDEAE4;
            --border-input: #D9D5CE;
            --cta-orange: #E87A3A;
            --white: #FFFFFF;
            --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.12);
            --radius-sm: 10px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --font-base: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
            --font-en: 'Inter', 'Helvetica Neue', sans-serif;
            --container-max: 1280px;
            --container-padding: 24px;
            --nav-height: 72px;
            --transition: 0.3s ease;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-base);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-warm);
            min-height: 100vh;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }

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

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            border: none;
            outline: none;
        }

        button {
            cursor: pointer;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-family: var(--font-base);
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.25;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--container-padding);
        }

        /* ===== Typography ===== */
        h1 {
            font-size: 48px;
            letter-spacing: -0.5px;
        }
        h2 {
            font-size: 36px;
            font-weight: 600;
            letter-spacing: 0;
        }
        h3 {
            font-size: 24px;
            font-weight: 600;
        }
        .text-body {
            font-size: 16px;
            line-height: 1.7;
            font-weight: 400;
        }
        .text-small {
            font-size: 14px;
            line-height: 1.5;
            color: var(--text-secondary);
        }
        .text-tiny {
            font-size: 12px;
            font-weight: 500;
            letter-spacing: 0.5px;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            cursor: pointer;
            border: 1px solid transparent;
            text-align: center;
            min-height: 44px;
            min-width: 44px;
        }
        .btn-primary {
            background: var(--primary);
            color: var(--white);
            padding: 14px 32px;
            font-size: 16px;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            box-shadow: 0 4px 16px rgba(30, 77, 58, 0.3);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.2);
        }
        .btn-secondary {
            background: transparent;
            color: var(--accent);
            border: 1px solid var(--accent);
            padding: 12px 28px;
            font-size: 15px;
        }
        .btn-secondary:hover {
            background: var(--accent-light);
            transform: translateY(-1px);
        }
        .btn-secondary:active {
            transform: translateY(0);
        }
        .btn-cta {
            background: var(--accent);
            color: #1A1A1A;
            padding: 14px 32px;
            font-size: 16px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            background-image: linear-gradient(135deg, var(--accent), #e0a84c);
            box-shadow: 0 4px 14px rgba(212, 149, 58, 0.35);
        }
        .btn-cta:hover {
            background: var(--accent-hover);
            background-image: linear-gradient(135deg, var(--accent-hover), #c98f2e);
            box-shadow: 0 6px 20px rgba(212, 149, 58, 0.45);
            transform: translateY(-2px);
        }
        .btn-cta:active {
            transform: translateY(0);
            box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.15);
        }
        .btn-outline-light {
            background: transparent;
            color: var(--white);
            border: 1px solid rgba(255, 255, 255, 0.4);
            padding: 12px 28px;
            font-size: 15px;
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.7);
        }
        .btn-disabled {
            opacity: 0.4;
            pointer-events: none;
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 14px;
            border-radius: 8px;
        }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 500;
            letter-spacing: 0.5px;
            background: var(--primary-light);
            color: var(--primary);
            line-height: 1.4;
        }
        .badge-accent {
            background: var(--accent-light);
            color: #8a5e1a;
        }
        .badge-hot {
            background: rgba(232, 122, 58, 0.15);
            color: #b85a2a;
        }
        .badge-new {
            background: rgba(30, 77, 58, 0.12);
            color: var(--primary);
        }

        /* ===== Card ===== */
        .card {
            background: var(--white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            padding: 24px 20px;
            transition: all var(--transition);
            border: 1px solid var(--border-light);
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .card-img-top {
            border-radius: var(--radius-lg) var(--radius-lg) 0 0;
            overflow: hidden;
            margin: -24px -20px 16px -20px;
        }
        .card-img-top img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            aspect-ratio: 16 / 9;
        }

        /* ===== Section Spacing ===== */
        .section {
            padding: 80px 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            margin-bottom: 16px;
        }
        .section-title p {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto;
        }

        /* ===== Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: var(--bg-dark);
            height: var(--nav-height);
            display: flex;
            align-items: center;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--white);
            letter-spacing: -0.3px;
            flex-shrink: 0;
        }
        .site-logo .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--accent);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 800;
            color: #1A1A1A;
        }
        .site-logo span {
            color: var(--white);
        }
        .nav-panel {
            display: flex;
            align-items: center;
            gap: 12px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-md);
            padding: 6px 16px;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        .nav-item {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 500;
            color: var(--text-light);
            transition: all var(--transition);
            min-height: 44px;
        }
        .nav-item i {
            font-size: 16px;
        }
        .nav-item:hover {
            background: rgba(255, 255, 255, 0.08);
            color: var(--white);
        }
        .nav-item.active {
            background: rgba(212, 149, 58, 0.15);
            color: var(--accent);
        }
        .nav-cta-group {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .nav-cta-group .btn-cta {
            padding: 10px 24px;
            font-size: 14px;
            min-height: 44px;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 10px;
            cursor: pointer;
            background: none;
            border: none;
            min-height: 44px;
            min-width: 44px;
            align-items: center;
            justify-content: center;
        }
        .hamburger span {
            width: 24px;
            height: 2px;
            background: var(--white);
            border-radius: 2px;
            transition: all var(--transition);
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* Mobile Nav Drawer */
        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--nav-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--bg-dark);
            z-index: 999;
            padding: 24px 16px;
            overflow-y: auto;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .mobile-nav.open {
            display: block;
        }
        .mobile-nav-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }
        .mobile-nav-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 20px 12px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: var(--radius-md);
            color: var(--text-light);
            font-size: 14px;
            font-weight: 500;
            transition: all var(--transition);
            min-height: 80px;
            border: 1px solid rgba(255, 255, 255, 0.06);
        }
        .mobile-nav-item i {
            font-size: 24px;
        }
        .mobile-nav-item:hover,
        .mobile-nav-item.active {
            background: rgba(212, 149, 58, 0.12);
            color: var(--accent);
            border-color: rgba(212, 149, 58, 0.2);
        }
        .mobile-nav-cta {
            margin-top: 20px;
            width: 100%;
        }
        .mobile-nav-cta .btn-cta {
            width: 100%;
            justify-content: center;
            padding: 14px;
        }

        /* ===== Hero ===== */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            position: relative;
            background: var(--bg-dark);
            background-image: linear-gradient(135deg, #162B21 0%, #1E4D3A 70%, #1a3d2e 100%);
            overflow: hidden;
            padding-top: var(--nav-height);
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            opacity: 0.18;
            mix-blend-mode: overlay;
        }
        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 30% 50%, rgba(212, 149, 58, 0.08) 0%, transparent 60%);
            pointer-events: none;
        }
        .hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
            padding-top: 40px;
            padding-bottom: 60px;
        }
        .hero h1 {
            color: var(--white);
            font-size: 52px;
            font-weight: 700;
            letter-spacing: -0.5px;
            margin-bottom: 20px;
            line-height: 1.2;
        }
        .hero .hero-sub {
            font-size: 22px;
            color: var(--accent);
            font-weight: 400;
            margin-bottom: 36px;
            line-height: 1.5;
            max-width: 680px;
            margin-left: auto;
            margin-right: auto;
        }
        .hero .hero-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero .hero-actions .btn-cta {
            font-size: 18px;
            padding: 16px 40px;
        }
        .hero .hero-actions .btn-outline-light {
            font-size: 16px;
            padding: 14px 32px;
        }

        /* Trust Bar */
        .trust-bar {
            display: flex;
            justify-content: center;
            gap: 40px;
            margin-top: 56px;
            flex-wrap: wrap;
            padding: 20px 32px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-lg);
            border: 1px solid rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(4px);
        }
        .trust-item {
            display: flex;
            align-items: center;
            gap: 12px;
            color: var(--text-light);
            font-size: 14px;
            font-weight: 400;
        }
        .trust-item .num {
            font-size: 28px;
            font-weight: 700;
            color: var(--accent);
            font-family: var(--font-en);
        }

        /* ===== Services (2x2) ===== */
        .services-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .service-card {
            background: var(--white);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .service-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .service-card .icon-wrap {
            width: 56px;
            height: 56px;
            background: var(--primary-light);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            color: var(--primary);
            flex-shrink: 0;
            transition: background var(--transition);
        }
        .service-card:hover .icon-wrap {
            background: rgba(30, 77, 58, 0.18);
        }
        .service-card h3 {
            font-size: 20px;
            font-weight: 600;
            margin-top: 4px;
        }
        .service-card p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== Stats ===== */
        .stats-section {
            background: var(--bg-dark);
            background-image: linear-gradient(135deg, #162B21, #1a3327);
            padding: 80px 0;
        }
        .stats-grid {
            display: flex;
            justify-content: center;
            gap: 48px;
            flex-wrap: wrap;
        }
        .stat-item {
            text-align: center;
            min-width: 160px;
        }
        .stat-item .stat-num {
            font-size: 72px;
            font-weight: 700;
            color: var(--accent);
            font-family: var(--font-en);
            line-height: 1;
            margin-bottom: 12px;
        }
        .stat-item .stat-label {
            font-size: 16px;
            color: var(--text-light);
            font-weight: 400;
            letter-spacing: 0.3px;
        }

        /* ===== Cases (交错图文) ===== */
        .case-item {
            display: flex;
            align-items: center;
            gap: 48px;
            margin-bottom: 64px;
        }
        .case-item:last-child {
            margin-bottom: 0;
        }
        .case-item.reverse {
            flex-direction: row-reverse;
        }
        .case-img {
            flex: 0 0 48%;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }
        .case-img img {
            width: 100%;
            height: 320px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .case-img:hover img {
            transform: scale(1.03);
        }
        .case-text {
            flex: 1;
        }
        .case-text h3 {
            font-size: 26px;
            margin-bottom: 16px;
        }
        .case-text p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 20px;
        }
        .case-text .btn-link {
            font-size: 15px;
            font-weight: 600;
            color: var(--accent);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap var(--transition);
        }
        .case-text .btn-link:hover {
            gap: 12px;
            color: var(--accent-hover);
        }

        /* ===== Features ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--white);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            position: relative;
        }
        .feature-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .feature-card .feature-badge {
            position: absolute;
            top: 16px;
            right: 16px;
        }
        .feature-card .f-icon {
            font-size: 32px;
            color: var(--primary);
            margin-bottom: 16px;
        }
        .feature-card h3 {
            font-size: 20px;
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .feature-card .feature-list {
            margin-top: 14px;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .feature-card .feature-list li {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-secondary);
        }
        .feature-card .feature-list li i {
            color: var(--primary);
            font-size: 12px;
        }

        /* ===== FAQ (手风琴) ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid var(--border-light);
            padding: 0;
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
            padding: 20px 0;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            background: none;
            border: none;
            cursor: pointer;
            text-align: left;
            min-height: 44px;
            transition: color var(--transition);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question .faq-icon {
            font-size: 14px;
            color: var(--text-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
            margin-left: 12px;
        }
        .faq-question.open .faq-icon {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 0;
        }
        .faq-answer.open {
            max-height: 400px;
            padding: 0 0 20px 0;
        }
        .faq-answer p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-secondary);
        }

        /* ===== Contact ===== */
        .contact-wrap {
            display: flex;
            gap: 48px;
            align-items: flex-start;
        }
        .contact-form {
            flex: 1;
            background: var(--white);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }
        .contact-form .form-group {
            margin-bottom: 20px;
        }
        .contact-form label {
            display: block;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            margin-bottom: 8px;
        }
        .contact-form input,
        .contact-form textarea {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border-input);
            border-radius: var(--radius-sm);
            font-size: 15px;
            color: var(--text-primary);
            background: var(--white);
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .contact-form input:focus,
        .contact-form textarea:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(30, 77, 58, 0.1);
        }
        .contact-form textarea {
            min-height: 120px;
            resize: vertical;
        }
        .contact-form .btn-primary {
            width: 100%;
            margin-top: 8px;
        }
        .contact-info {
            flex: 0 0 320px;
            padding: 32px 0;
        }
        .contact-info h3 {
            font-size: 22px;
            margin-bottom: 20px;
        }
        .contact-info .info-item {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            margin-bottom: 20px;
            font-size: 15px;
            color: var(--text-secondary);
        }
        .contact-info .info-item i {
            font-size: 18px;
            color: var(--primary);
            margin-top: 2px;
            min-width: 22px;
        }

        /* ===== News / CMS List ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .news-card {
            background: var(--white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .news-card .news-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }
        .news-card .news-body {
            padding: 20px 20px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-card .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 10px;
            font-size: 12px;
            color: var(--text-muted);
        }
        .news-card .news-meta .badge {
            font-size: 11px;
            padding: 2px 10px;
        }
        .news-card .news-title {
            font-size: 16px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 10px;
            color: var(--text-primary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card .news-excerpt {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
            margin-bottom: 14px;
        }
        .news-card .news-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--accent);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap var(--transition);
            margin-top: auto;
        }
        .news-card .news-link:hover {
            gap: 10px;
        }

        .news-empty {
            grid-column: 1 / -1;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 60px 24px;
            background: var(--bg-warm);
            border: 2px dashed var(--border-light);
            border-radius: var(--radius-lg);
            color: var(--text-muted);
            font-size: 16px;
            gap: 12px;
        }
        .news-empty i {
            font-size: 40px;
            color: var(--border-input);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: var(--text-light);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-brand .site-logo {
            margin-bottom: 16px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-light-muted);
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--white);
            margin-bottom: 16px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: var(--text-light-muted);
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--accent);
        }
        .footer-social {
            display: flex;
            gap: 12px;
            margin-top: 16px;
        }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-light-muted);
            font-size: 16px;
            transition: all var(--transition);
        }
        .footer-social a:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(212, 149, 58, 0.08);
        }
        .footer-bottom {
            padding: 20px 0;
            text-align: center;
            font-size: 12px;
            color: var(--text-light-muted);
        }

        /* ===== Back to Top ===== */
        .back-top {
            position: fixed;
            bottom: 32px;
            right: 32px;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--accent);
            color: #1A1A1A;
            font-size: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 16px rgba(212, 149, 58, 0.3);
            transition: all var(--transition);
            z-index: 100;
            opacity: 0;
            visibility: hidden;
            transform: translateY(12px);
        }
        .back-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .back-top:hover {
            background: var(--accent-hover);
            transform: translateY(-3px);
            box-shadow: 0 6px 24px rgba(212, 149, 58, 0.4);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: 1fr 1fr;
            }
            .news-grid {
                grid-template-columns: 1fr 1fr;
            }
            .case-item {
                flex-direction: column;
                gap: 24px;
            }
            .case-item.reverse {
                flex-direction: column;
            }
            .case-img {
                flex: 0 0 100%;
                width: 100%;
            }
            .case-img img {
                height: 240px;
            }
            .contact-wrap {
                flex-direction: column;
            }
            .contact-info {
                flex: 0 0 auto;
                padding: 0;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --container-padding: 16px;
            }
            h1 {
                font-size: 32px;
            }
            h2 {
                font-size: 26px;
            }
            h3 {
                font-size: 18px;
            }
            .section {
                padding: 48px 0;
            }
            .section-title {
                margin-bottom: 32px;
            }

            .nav-panel {
                display: none;
            }
            .nav-cta-group .btn-cta {
                display: none;
            }
            .hamburger {
                display: flex;
            }

            .hero h1 {
                font-size: 32px;
            }
            .hero .hero-sub {
                font-size: 17px;
            }
            .hero .hero-actions .btn-cta {
                font-size: 16px;
                padding: 14px 28px;
            }
            .trust-bar {
                gap: 20px;
                padding: 16px 20px;
                flex-direction: column;
                align-items: center;
            }

            .services-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .service-card {
                padding: 24px 20px;
            }

            .stats-grid {
                gap: 32px;
            }
            .stat-item .stat-num {
                font-size: 48px;
            }

            .features-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .news-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-brand p {
                max-width: 100%;
            }

            .back-top {
                bottom: 20px;
                right: 20px;
                width: 44px;
                height: 44px;
            }

            .contact-form {
                padding: 24px 20px;
            }
            .case-img img {
                height: 200px;
            }
        }

        @media (max-width: 520px) {
            .hero h1 {
                font-size: 26px;
            }
            .hero .hero-sub {
                font-size: 15px;
            }
            .stat-item .stat-num {
                font-size: 40px;
            }
            .stat-item {
                min-width: 120px;
            }
            .trust-item .num {
                font-size: 22px;
            }
            .mobile-nav-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (min-width: 1280px) {
            .container {
                padding: 0 32px;
            }
        }

        /* ===== Focus Accessibility ===== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-8 {
            margin-top: 8px;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .gap-12 {
            gap: 12px;
        }

/* roulang page: article */
:root {
            --primary: #1E4D3A;
            --primary-dark: #163A2B;
            --primary-light: rgba(30, 77, 58, 0.08);
            --secondary: #D4953A;
            --secondary-hover: #B87D2E;
            --accent: #E87A3A;
            --bg-warm: #F7F4EE;
            --bg-dark: #162B21;
            --bg-card: #FFFFFF;
            --text-dark: #1A1A1A;
            --text-mid: #5A5A5A;
            --text-light: #9A9A9A;
            --text-footer: #C8C8C8;
            --text-footer-link: #B5B5B5;
            --border-warm: #EDEAE4;
            --border-input: #D9D5CE;
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.10);
            --font-cn: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
            --font-en: 'Inter', 'Helvetica Neue', sans-serif;
            --max-width: 1280px;
            --header-h: 72px;
            --spacer: 80px;
            --spacer-mobile: 48px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-cn);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-dark);
            background: var(--bg-warm);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
        }
        ul {
            list-style: none;
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
            :root {
                --spacer: var(--spacer-mobile);
            }
        }

        /* ===== Header & Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: var(--bg-dark);
            height: var(--header-h);
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--secondary);
            color: var(--text-dark);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 18px;
            font-family: var(--font-cn);
        }
        .site-logo span:last-child {
            color: #fff;
            font-weight: 600;
            font-size: 18px;
            letter-spacing: 0.5px;
        }
        .nav-panel {
            display: flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.06);
            padding: 6px 12px;
            border-radius: 12px;
            backdrop-filter: blur(4px);
        }
        .nav-item {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.7);
            font-size: 14px;
            font-weight: 500;
            transition: all 0.3s ease;
            white-space: nowrap;
        }
        .nav-item i {
            font-size: 14px;
        }
        .nav-item:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.10);
        }
        .nav-item.active {
            color: #fff;
            background: var(--primary);
        }
        .nav-cta {
            flex-shrink: 0;
        }
        .btn-cta-nav {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--secondary);
            color: var(--text-dark);
            padding: 10px 24px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 14px;
            transition: all 0.3s ease;
        }
        .btn-cta-nav:hover {
            background: var(--secondary-hover);
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(212, 149, 58, 0.3);
        }
        .menu-toggle {
            display: none;
            background: none;
            color: #fff;
            font-size: 24px;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 6px;
            transition: background 0.3s;
        }
        .menu-toggle:hover {
            background: rgba(255, 255, 255, 0.08);
        }
        @media (max-width: 768px) {
            .nav-panel {
                display: none;
                position: absolute;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: var(--bg-dark);
                flex-direction: column;
                padding: 16px 24px;
                border-radius: 0 0 16px 16px;
                gap: 6px;
                backdrop-filter: none;
            }
            .nav-panel.open {
                display: flex;
            }
            .nav-item {
                width: 100%;
                padding: 12px 16px;
                font-size: 16px;
            }
            .nav-cta {
                display: none;
            }
            .menu-toggle {
                display: block;
            }
            .site-logo span:last-child {
                font-size: 16px;
            }
        }

        /* ===== Article Page ===== */
        .article-page {
            padding-top: calc(var(--header-h) + 32px);
            padding-bottom: 60px;
        }
        .breadcrumb {
            font-size: 14px;
            color: var(--text-mid);
            margin-bottom: 24px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px;
        }
        .breadcrumb a {
            color: var(--text-mid);
            transition: color 0.3s;
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            color: var(--text-light);
            margin: 0 2px;
        }
        .breadcrumb .current {
            color: var(--text-dark);
            font-weight: 600;
        }
        .article-wrapper {
            max-width: 800px;
            margin: 0 auto;
        }
        .article-header {
            margin-bottom: 32px;
        }
        .article-header h1 {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.5px;
            color: var(--text-dark);
            margin-bottom: 16px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px;
            font-size: 14px;
            color: var(--text-mid);
        }
        .article-meta .cat-badge {
            background: var(--primary-light);
            color: var(--primary);
            padding: 4px 14px;
            border-radius: var(--radius-lg);
            font-weight: 500;
            font-size: 12px;
        }
        .article-meta .date {
            font-size: 13px;
        }
        .article-featured-img {
            width: 100%;
            border-radius: var(--radius-md);
            overflow: hidden;
            margin-bottom: 32px;
            aspect-ratio: 16 / 9;
            background: var(--border-warm);
        }
        .article-featured-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .article-content {
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-dark);
        }
        .article-content p {
            margin-bottom: 24px;
        }
        .article-content h2 {
            font-size: 28px;
            font-weight: 600;
            margin-top: 40px;
            margin-bottom: 16px;
            line-height: 1.3;
        }
        .article-content h3 {
            font-size: 20px;
            font-weight: 600;
            margin-top: 32px;
            margin-bottom: 12px;
            line-height: 1.4;
        }
        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--bg-warm);
            padding: 20px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-mid);
            font-style: normal;
        }
        .article-content ul,
        .article-content ol {
            margin: 16px 0 24px 20px;
        }
        .article-content li {
            margin-bottom: 8px;
        }
        .article-content img {
            border-radius: var(--radius-sm);
            margin: 24px auto;
        }
        .article-content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-content a:hover {
            color: var(--secondary);
        }
        .article-content .code-block {
            background: var(--bg-dark);
            color: #e8e8e8;
            padding: 20px 24px;
            border-radius: var(--radius-sm);
            font-family: 'Inter', monospace;
            font-size: 14px;
            line-height: 1.6;
            overflow-x: auto;
            margin: 24px 0;
        }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            border-radius: var(--radius-sm);
            overflow: hidden;
            border: 1px solid var(--border-warm);
        }
        .article-content th,
        .article-content td {
            padding: 12px 16px;
            text-align: left;
            border-bottom: 1px solid var(--border-warm);
        }
        .article-content th {
            background: var(--bg-warm);
            font-weight: 600;
            color: var(--text-dark);
        }
        .article-content td {
            color: var(--text-mid);
        }
        .article-content tr:last-child td {
            border-bottom: none;
        }

        /* Not found state */
        .article-not-found {
            text-align: center;
            padding: 80px 24px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
        }
        .article-not-found i {
            font-size: 48px;
            color: var(--text-light);
            margin-bottom: 16px;
        }
        .article-not-found h2 {
            font-size: 24px;
            color: var(--text-dark);
            margin-bottom: 12px;
        }
        .article-not-found p {
            color: var(--text-mid);
            margin-bottom: 24px;
        }
        .article-not-found .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            transition: all 0.3s ease;
        }
        .article-not-found .btn-back:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        /* ===== Related Posts ===== */
        .related-section {
            margin-top: 56px;
            padding-top: 40px;
            border-top: 1px solid var(--border-warm);
        }
        .related-section h3 {
            font-size: 24px;
            font-weight: 600;
            margin-bottom: 24px;
            color: var(--text-dark);
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all 0.3s ease;
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .related-card .card-img {
            aspect-ratio: 16 / 9;
            background: var(--border-warm);
            overflow: hidden;
        }
        .related-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .related-card:hover .card-img img {
            transform: scale(1.05);
        }
        .related-card .card-body {
            padding: 16px 20px 20px;
        }
        .related-card .card-body h4 {
            font-size: 16px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 8px;
            color: var(--text-dark);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body .card-meta {
            font-size: 12px;
            color: var(--text-light);
        }
        .related-back {
            margin-top: 32px;
            text-align: center;
        }
        .related-back a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--primary);
            font-weight: 500;
            transition: color 0.3s;
        }
        .related-back a:hover {
            color: var(--secondary);
        }
        @media (max-width: 768px) {
            .related-grid {
                grid-template-columns: 1fr;
            }
            .article-header h1 {
                font-size: 26px;
            }
            .article-content h2 {
                font-size: 22px;
            }
            .article-content h3 {
                font-size: 18px;
            }
        }
        @media (min-width: 769px) and (max-width: 1024px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        /* ===== Back to Top ===== */
        .back-to-top {
            position: fixed;
            bottom: 32px;
            right: 32px;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--secondary);
            color: var(--text-dark);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            box-shadow: 0 4px 16px rgba(212, 149, 58, 0.3);
            cursor: pointer;
            transition: all 0.3s ease;
            z-index: 999;
            border: none;
        }
        .back-to-top:hover {
            background: var(--secondary-hover);
            transform: translateY(-3px);
            box-shadow: 0 6px 24px rgba(212, 149, 58, 0.4);
        }
        @media (max-width: 768px) {
            .back-to-top {
                bottom: 20px;
                right: 20px;
                width: 40px;
                height: 40px;
                font-size: 16px;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            padding: 60px 0 0;
            color: var(--text-footer);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-brand .site-logo span:last-child {
            color: #fff;
        }
        .footer-brand p {
            margin-top: 16px;
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-footer-link);
        }
        .footer-col h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: var(--text-footer-link);
            font-size: 14px;
            transition: color 0.3s;
        }
        .footer-col ul li a:hover {
            color: var(--secondary);
        }
        .footer-social {
            display: flex;
            gap: 12px;
            margin-top: 16px;
        }
        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-footer-link);
            font-size: 14px;
            transition: all 0.3s ease;
        }
        .footer-social a:hover {
            border-color: var(--secondary);
            color: var(--secondary);
            background: rgba(212, 149, 58, 0.08);
        }
        .footer-bottom {
            text-align: center;
            padding: 20px 0;
            font-size: 12px;
            color: #7A7A7A;
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-col h4 {
                margin-bottom: 12px;
            }
        }

        /* ===== Misc ===== */
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }
        @media (max-width: 520px) {
            .article-meta {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .article-content {
                font-size: 15px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #1E4D3A;
            --primary-hover: #163A2B;
            --primary-light: rgba(30, 77, 58, 0.10);
            --secondary: #D4953A;
            --secondary-hover: #B87D2E;
            --secondary-light: rgba(212, 149, 58, 0.20);
            --accent: #E87A3A;
            --bg-warm: #F7F4EE;
            --bg-dark: #162B21;
            --bg-white: #FFFFFF;
            --text-dark: #1A1A1A;
            --text-mid: #5A5A5A;
            --text-light: #9A9A9A;
            --border-warm: #EDEAE4;
            --border-input: #D9D5CE;
            --radius-sm: 10px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-sm: 0 2px 12px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
            --shadow-lg: 0 8px 30px rgba(0,0,0,0.10);
            --transition: 0.3s ease;
            --max-width: 1280px;
            --header-h: 72px;
            --font-sans: 'Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,sans-serif;
            --font-num: 'Inter','Helvetica Neue',sans-serif;
        }
        *,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
        html{scroll-behavior:smooth}
        body{font-family:var(--font-sans);background:var(--bg-warm);color:var(--text-dark);line-height:1.7;font-size:16px;-webkit-font-smoothing:antialiased}
        a{color:inherit;text-decoration:none;transition:var(--transition)}
        img{max-width:100%;height:auto;display:block}
        ul{list-style:none}
        .container{max-width:var(--max-width);margin:0 auto;padding:0 24px}
        @media(max-width:768px){.container{padding:0 16px}}
        .section{padding:80px 0}
        @media(max-width:768px){.section{padding:48px 0}}
        .section-title{font-size:36px;font-weight:600;letter-spacing:0;margin-bottom:16px;color:var(--text-dark)}
        .section-sub{font-size:16px;color:var(--text-mid);max-width:640px;line-height:1.7}
        @media(max-width:768px){.section-title{font-size:26px}.section-sub{font-size:15px}}
        .text-center{text-align:center}
        .mx-auto{margin-left:auto;margin-right:auto}
        .flex-center{display:flex;align-items:center;justify-content:center}
        .grid-2{display:grid;grid-template-columns:1fr 1fr;gap:24px}
        @media(max-width:768px){.grid-2{grid-template-columns:1fr}}
        .grid-3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:24px}
        @media(max-width:1024px){.grid-3{grid-template-columns:1fr 1fr}}@media(max-width:768px){.grid-3{grid-template-columns:1fr}}
        .grid-4{display:grid;grid-template-columns:1fr 1fr 1fr 1fr;gap:24px}
        @media(max-width:1024px){.grid-4{grid-template-columns:1fr 1fr}}@media(max-width:768px){.grid-4{grid-template-columns:1fr}}
        .card{background:var(--bg-white);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);padding:24px;transition:var(--transition);border:1px solid var(--border-warm)}
        .card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}
        @media(max-width:768px){.card{padding:16px}}
        .badge{display:inline-block;border-radius:20px;padding:4px 12px;font-size:12px;font-weight:500;letter-spacing:0.5px;background:var(--primary-light);color:var(--primary)}
        .badge-gold{background:var(--secondary-light);color:var(--text-dark)}
        .badge-accent{background:rgba(232,122,58,0.12);color:var(--accent)}
        .btn{display:inline-flex;align-items:center;justify-content:center;border:none;border-radius:var(--radius-sm);font-weight:600;font-family:var(--font-sans);cursor:pointer;transition:var(--transition);font-size:16px;padding:14px 32px;line-height:1.2}
        .btn-primary{background:var(--primary);color:#fff}
        .btn-primary:hover{background:var(--primary-hover);box-shadow:0 4px 16px rgba(30,77,58,0.30)}
        .btn-primary:active{transform:scale(0.97)}
        .btn-secondary{background:transparent;border:1px solid var(--secondary);color:var(--secondary)}
        .btn-secondary:hover{background:var(--secondary-light);border-color:var(--secondary-hover);color:var(--secondary-hover)}
        .btn-cta{background:var(--secondary);color:var(--text-dark)}
        .btn-cta:hover{background:var(--secondary-hover);box-shadow:0 4px 20px rgba(212,149,58,0.35);transform:translateY(-2px)}
        .btn-cta:active{transform:scale(0.97)}
        .btn:disabled{opacity:0.4;cursor:not-allowed;pointer-events:none}
        /* header & nav */
        .site-header{background:var(--bg-dark);height:var(--header-h);position:sticky;top:0;z-index:100;border-bottom:1px solid rgba(237,234,228,0.06)}
        .header-inner{display:flex;align-items:center;justify-content:space-between;height:100%;max-width:var(--max-width);margin:0 auto;padding:0 24px}
        .site-logo{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:20px;letter-spacing:-0.3px}
        .site-logo .logo-icon{display:flex;align-items:center;justify-content:center;width:38px;height:38px;background:var(--secondary);color:var(--text-dark);border-radius:var(--radius-sm);font-size:18px;font-weight:700;flex-shrink:0}
        .site-logo:hover{color:var(--secondary)}
        .nav-panel{display:flex;align-items:center;gap:8px;background:rgba(255,255,255,0.06);border-radius:var(--radius-md);padding:6px 8px;backdrop-filter:blur(4px)}
        .nav-item{display:flex;align-items:center;gap:8px;padding:10px 18px;border-radius:var(--radius-sm);font-size:14px;font-weight:500;color:rgba(255,255,255,0.75);transition:var(--transition);white-space:nowrap}
        .nav-item i{font-size:14px;opacity:0.7}
        .nav-item:hover{background:rgba(255,255,255,0.10);color:#fff}
        .nav-item.active{background:var(--primary);color:#fff;box-shadow:0 2px 8px rgba(30,77,58,0.30)}
        .nav-item.active i{opacity:1}
        .header-cta .btn-cta{padding:10px 24px;font-size:14px;border-radius:var(--radius-sm)}
        .mobile-toggle{display:none;background:none;border:none;color:#fff;font-size:24px;cursor:pointer;padding:8px;border-radius:var(--radius-sm)}
        .mobile-toggle:hover{background:rgba(255,255,255,0.08)}
        @media(max-width:1024px){
            .nav-panel{gap:4px;padding:4px 6px}
            .nav-item{padding:8px 14px;font-size:13px}
        }
        @media(max-width:768px){
            .site-header{height:64px}
            .header-inner{padding:0 16px}
            .nav-panel{display:none;position:absolute;top:64px;left:0;right:0;background:var(--bg-dark);flex-direction:column;padding:16px;border-radius:0 0 var(--radius-md) var(--radius-md);border-top:1px solid rgba(237,234,228,0.08);gap:6px}
            .nav-panel.open{display:flex}
            .nav-item{width:100%;justify-content:flex-start;padding:12px 16px}
            .mobile-toggle{display:block}
            .header-cta .btn-cta{padding:8px 18px;font-size:13px}
        }
        /* hero banner */
        .category-hero{position:relative;padding:100px 0;background:linear-gradient(135deg,var(--bg-dark) 0%,#1a3a2e 100%);overflow:hidden;min-height:360px;display:flex;align-items:center}
        .category-hero::before{content:'';position:absolute;inset:0;background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;opacity:0.20;mix-blend-mode:overlay}
        .category-hero .hero-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(22,43,33,0.88) 0%,rgba(26,58,46,0.70) 100%)}
        .category-hero .container{position:relative;z-index:2;text-align:center}
        .category-hero h1{font-size:48px;font-weight:700;letter-spacing:-0.5px;color:#fff;margin-bottom:16px}
        .category-hero .hero-tag{display:inline-block;padding:6px 20px;border-radius:20px;background:rgba(212,149,58,0.20);color:var(--secondary);font-size:14px;font-weight:500;margin-bottom:20px;border:1px solid rgba(212,149,58,0.15)}
        .category-hero .hero-desc{font-size:18px;color:rgba(255,255,255,0.80);max-width:680px;margin:0 auto 28px;line-height:1.8}
        .category-hero .hero-stats{display:flex;justify-content:center;gap:48px;margin-top:36px;flex-wrap:wrap}
        .category-hero .hero-stat{text-align:center}
        .category-hero .hero-stat .num{font-family:var(--font-num);font-size:36px;font-weight:700;color:var(--secondary);display:block}
        .category-hero .hero-stat .label{font-size:14px;color:rgba(255,255,255,0.65);margin-top:4px}
        @media(max-width:768px){
            .category-hero{padding:64px 0;min-height:280px}
            .category-hero h1{font-size:32px}
            .category-hero .hero-desc{font-size:16px}
            .category-hero .hero-stats{gap:24px}
            .category-hero .hero-stat .num{font-size:28px}
        }
        /* features 2x2 */
        .features-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
        @media(max-width:768px){.features-grid{grid-template-columns:1fr}}
        .feature-card{background:var(--bg-white);border-radius:var(--radius-lg);padding:32px 28px;box-shadow:var(--shadow-sm);border:1px solid var(--border-warm);transition:var(--transition);position:relative;overflow:hidden}
        .feature-card::after{content:'';position:absolute;top:0;left:0;width:4px;height:100%;background:var(--primary);border-radius:0 2px 2px 0;opacity:0;transition:var(--transition)}
        .feature-card:hover::after{opacity:1}
        .feature-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}
        .feature-card .icon-wrap{width:48px;height:48px;border-radius:var(--radius-sm);background:var(--primary-light);display:flex;align-items:center;justify-content:center;font-size:22px;color:var(--primary);margin-bottom:18px}
        .feature-card h3{font-size:20px;font-weight:600;margin-bottom:10px;color:var(--text-dark)}
        .feature-card p{font-size:15px;color:var(--text-mid);line-height:1.7}
        @media(max-width:768px){.feature-card{padding:24px 20px}.feature-card h3{font-size:18px}}
        /* stats */
        .stats-section{background:var(--bg-dark);position:relative;overflow:hidden}
        .stats-section::before{content:'';position:absolute;inset:0;background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat;opacity:0.08;mix-blend-mode:overlay}
        .stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;position:relative;z-index:2}
        .stat-item{text-align:center;padding:20px 0}
        .stat-item .stat-num{font-family:var(--font-num);font-size:72px;font-weight:700;color:var(--secondary);line-height:1;margin-bottom:8px}
        .stat-item .stat-label{font-size:16px;color:rgba(255,255,255,0.75);font-weight:500;letter-spacing:0.3px}
        .stat-item .stat-sub{font-size:13px;color:rgba(255,255,255,0.45);margin-top:6px}
        @media(max-width:1024px){.stats-grid{grid-template-columns:repeat(2,1fr);gap:24px}}
        @media(max-width:768px){.stats-grid{grid-template-columns:repeat(2,1fr);gap:16px}.stat-item .stat-num{font-size:48px}}
        /* solutions */
        .solutions-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
        @media(max-width:1024px){.solutions-grid{grid-template-columns:1fr 1fr}}@media(max-width:768px){.solutions-grid{grid-template-columns:1fr}}
        .solution-card{background:var(--bg-white);border-radius:var(--radius-lg);padding:28px;box-shadow:var(--shadow-sm);border:1px solid var(--border-warm);transition:var(--transition);position:relative}
        .solution-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}
        .solution-card .sol-badge{position:absolute;top:16px;right:16px}
        .solution-card .sol-icon{width:44px;height:44px;border-radius:var(--radius-sm);background:var(--primary-light);display:flex;align-items:center;justify-content:center;font-size:20px;color:var(--primary);margin-bottom:16px}
        .solution-card h3{font-size:18px;font-weight:600;margin-bottom:10px;color:var(--text-dark)}
        .solution-card p{font-size:14px;color:var(--text-mid);line-height:1.7;margin-bottom:14px}
        .solution-card .sol-features{display:flex;flex-direction:column;gap:6px}
        .solution-card .sol-features span{font-size:13px;color:var(--text-mid);display:flex;align-items:center;gap:8px}
        .solution-card .sol-features span i{color:var(--primary);font-size:12px}
        @media(max-width:768px){.solution-card{padding:20px}}
        /* faq */
        .faq-list{max-width:800px;margin:0 auto}
        .faq-item{border-bottom:1px solid var(--border-warm);transition:var(--transition)}
        .faq-item:last-child{border-bottom:none}
        .faq-question{display:flex;align-items:center;justify-content:space-between;padding:20px 0;cursor:pointer;font-size:16px;font-weight:600;color:var(--text-dark);background:none;border:none;width:100%;text-align:left;font-family:var(--font-sans);transition:var(--transition)}
        .faq-question:hover{color:var(--primary)}
        .faq-question .faq-icon{font-size:14px;color:var(--text-light);transition:var(--transition);flex-shrink:0;margin-left:16px}
        .faq-item.open .faq-question .faq-icon{transform:rotate(180deg);color:var(--primary)}
        .faq-answer{max-height:0;overflow:hidden;transition:max-height 0.4s ease,padding 0.3s ease;padding:0}
        .faq-answer-inner{padding-bottom:20px;font-size:15px;color:var(--text-mid);line-height:1.7;padding-right:32px}
        .faq-item.open .faq-answer{max-height:400px}
        .faq-item:hover{background:var(--bg-warm);border-radius:4px}
        @media(max-width:768px){.faq-question{font-size:15px;padding:16px 0}.faq-answer-inner{font-size:14px;padding-right:0}}
        /* cta */
        .cta-section{background:linear-gradient(135deg,var(--bg-dark) 0%,#1a3a2e 100%);position:relative;overflow:hidden;padding:80px 0;text-align:center}
        .cta-section::before{content:'';position:absolute;inset:0;background:url('/assets/images/backpic/back-3.webp') center/cover no-repeat;opacity:0.10;mix-blend-mode:overlay}
        .cta-section .container{position:relative;z-index:2}
        .cta-section h2{font-size:36px;font-weight:600;color:#fff;margin-bottom:12px}
        .cta-section p{font-size:18px;color:rgba(255,255,255,0.75);max-width:560px;margin:0 auto 28px;line-height:1.7}
        .cta-section .btn-cta{font-size:18px;padding:16px 44px}
        @media(max-width:768px){
            .cta-section{padding:48px 0}
            .cta-section h2{font-size:26px}
            .cta-section p{font-size:16px}
            .cta-section .btn-cta{font-size:16px;padding:14px 32px}
        }
        /* footer */
        .site-footer{background:var(--bg-dark);padding:60px 0 0;color:rgba(255,255,255,0.75)}
        .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:48px;padding-bottom:40px;border-bottom:1px solid rgba(237,234,228,0.08)}
        .footer-brand .site-logo{margin-bottom:16px}
        .footer-brand p{font-size:14px;color:rgba(255,255,255,0.55);line-height:1.8;max-width:360px}
        .footer-col h4{font-size:16px;font-weight:600;color:#fff;margin-bottom:16px}
        .footer-col ul li{margin-bottom:10px}
        .footer-col ul li a{font-size:14px;color:rgba(255,255,255,0.60);transition:var(--transition);display:flex;align-items:center;gap:8px}
        .footer-col ul li a:hover{color:var(--secondary);padding-left:4px}
        .footer-social{display:flex;gap:12px;margin-top:16px}
        .footer-social a{width:40px;height:40px;border-radius:50%;border:1px solid rgba(255,255,255,0.15);display:flex;align-items:center;justify-content:center;font-size:16px;color:rgba(255,255,255,0.50);transition:var(--transition)}
        .footer-social a:hover{border-color:var(--secondary);color:var(--secondary);background:rgba(212,149,58,0.08)}
        .footer-bottom{text-align:center;padding:24px 0;font-size:13px;color:rgba(255,255,255,0.35);margin-top:8px}
        @media(max-width:1024px){.footer-grid{grid-template-columns:1fr 1fr;gap:32px}.footer-brand{grid-column:1/-1}}
        @media(max-width:768px){.footer-grid{grid-template-columns:1fr;gap:28px}.footer-brand p{max-width:100%}}
        /* scroll top */
        .scroll-top{position:fixed;bottom:32px;right:32px;width:44px;height:44px;border-radius:50%;background:var(--secondary);color:var(--text-dark);border:none;font-size:18px;cursor:pointer;box-shadow:var(--shadow-md);transition:var(--transition);z-index:99;display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transform:translateY(12px)}
        .scroll-top.visible{opacity:1;visibility:visible;transform:translateY(0)}
        .scroll-top:hover{background:var(--secondary-hover);transform:translateY(-2px);box-shadow:var(--shadow-lg)}
        /* responsive extras */
        @media(max-width:520px){
            .category-hero h1{font-size:26px}
            .category-hero .hero-desc{font-size:15px}
            .stat-item .stat-num{font-size:40px}
            .section-title{font-size:22px}
            .features-grid{gap:16px}
            .solutions-grid{gap:16px}
            .footer-grid{gap:20px}
        }
        .feature-card .icon-wrap.special{background:rgba(232,122,58,0.10);color:var(--accent)}
        .solution-card .sol-icon.special{background:rgba(212,149,58,0.12);color:var(--secondary)}
        .hero-cta-group{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
        .hero-cta-group .btn{min-width:180px}
        @media(max-width:768px){.hero-cta-group .btn{min-width:140px;font-size:14px;padding:12px 24px}}
        .cover-img-wrap{border-radius:var(--radius-lg);overflow:hidden;margin-bottom:18px;aspect-ratio:16/9;background:var(--bg-warm)}
        .cover-img-wrap img{width:100%;height:100%;object-fit:cover;transition:var(--transition)}
        .cover-img-wrap:hover img{transform:scale(1.03)}
        .feature-card .cover-img-wrap{margin-bottom:16px;border-radius:var(--radius-sm)}
        .solution-card .cover-img-wrap{margin-bottom:14px;border-radius:var(--radius-sm);aspect-ratio:16/9}
        .section-header{margin-bottom:48px}
        @media(max-width:768px){.section-header{margin-bottom:32px}}
        .section-header .section-title{position:relative;display:inline-block}
        .section-header .section-title::after{content:'';display:block;width:60px;height:3px;background:var(--secondary);border-radius:2px;margin-top:8px}
        .section-header.text-center .section-title::after{margin-left:auto;margin-right:auto}
        .tag-list{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
        .tag-list .tag{display:inline-block;padding:4px 14px;border-radius:20px;font-size:12px;font-weight:500;background:var(--bg-warm);color:var(--text-mid);border:1px solid var(--border-warm);transition:var(--transition)}
        .tag-list .tag:hover{background:var(--primary-light);color:var(--primary);border-color:var(--primary)}
        .empty-state{background:var(--bg-warm);border:2px dashed var(--border-warm);border-radius:var(--radius-md);padding:48px 24px;text-align:center;color:var(--text-light);font-size:15px}

/* roulang page: category2 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1E4D3A;
            --primary-dark: #163A2B;
            --primary-light: #2A6B4F;
            --secondary: #D4953A;
            --secondary-dark: #B87D2E;
            --secondary-light: #E8B85A;
            --accent: #E87A3A;
            --accent-light: #F09A5A;
            --bg-warm: #F7F4EE;
            --bg-white: #FFFFFF;
            --bg-dark: #162B21;
            --bg-dark-light: #1E3D2F;
            --text-dark: #1A1A1A;
            --text-mid: #5A5A5A;
            --text-light: #9A9A9A;
            --text-white: #FFFFFF;
            --border-warm: #EDEAE4;
            --border-input: #D9D5CE;
            --shadow-sm: 0 2px 12px rgba(0,0,0,0.06);
            --shadow-md: 0 8px 30px rgba(0,0,0,0.10);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.14);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
            --font-en: 'Inter', 'Helvetica Neue', sans-serif;
            --transition: 0.3s ease;
            --max-width: 1280px;
            --header-height: 72px;
            --spacing-section: 80px;
            --spacing-section-mobile: 48px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-dark);
            background: var(--bg-warm);
            overflow-x: hidden;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        ul, ol { list-style: none; }
        button, input, textarea, select { font-family: inherit; font-size: inherit; border: none; outline: none; }
        input:focus, textarea:focus { outline: none; }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container { padding: 0 16px; }
        }

        /* ===== Typography ===== */
        h1, h2, h3, h4, h5, h6 { font-weight: 600; line-height: 1.3; color: var(--text-dark); }
        h1 { font-size: 48px; letter-spacing: -0.5px; font-weight: 700; }
        h2 { font-size: 36px; font-weight: 600; }
        h3 { font-size: 24px; font-weight: 600; }
        .body-text { font-size: 16px; line-height: 1.7; color: var(--text-dark); }
        .text-mid { color: var(--text-mid); font-size: 15px; line-height: 1.6; }
        .text-small { font-size: 14px; line-height: 1.5; color: var(--text-mid); }
        .text-tiny { font-size: 12px; font-weight: 500; letter-spacing: 0.5px; color: var(--text-light); }
        .text-white { color: var(--text-white); }
        @media (max-width: 768px) {
            h1 { font-size: 32px; }
            h2 { font-size: 26px; }
            h3 { font-size: 18px; }
            .body-text { font-size: 15px; }
            .text-mid { font-size: 14px; }
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex; align-items: center; gap: 8px;
            padding: 14px 32px; border-radius: 10px; font-weight: 600;
            font-size: 16px; line-height: 1; cursor: pointer;
            transition: var(--transition); border: none; text-align: center;
            min-height: 48px; justify-content: center;
        }
        .btn-primary {
            background: var(--primary); color: var(--text-white);
            box-shadow: 0 2px 8px rgba(30,77,58,0.3);
        }
        .btn-primary:hover { background: var(--primary-dark); box-shadow: 0 4px 16px rgba(30,77,58,0.4); transform: translateY(-1px); }
        .btn-primary:active { transform: translateY(0); box-shadow: inset 0 2px 4px rgba(0,0,0,0.2); }
        .btn-secondary {
            background: transparent; color: var(--secondary);
            border: 1.5px solid var(--secondary); padding: 12px 28px;
        }
        .btn-secondary:hover { background: rgba(212,149,58,0.12); transform: translateY(-1px); }
        .btn-cta {
            background: var(--secondary); color: var(--text-dark);
            box-shadow: 0 2px 12px rgba(212,149,58,0.35);
            font-weight: 700;
        }
        .btn-cta:hover { background: var(--secondary-dark); box-shadow: 0 4px 20px rgba(212,149,58,0.45); transform: translateY(-2px); }
        .btn-cta:active { transform: translateY(0); box-shadow: inset 0 2px 4px rgba(0,0,0,0.15); }
        .btn-sm { padding: 10px 20px; font-size: 14px; min-height: 40px; }
        .btn-disabled { opacity: 0.4; pointer-events: none; }
        @media (max-width: 768px) {
            .btn { padding: 12px 24px; font-size: 15px; min-height: 44px; }
            .btn-sm { padding: 8px 16px; font-size: 13px; min-height: 36px; }
        }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-block; border-radius: 20px; padding: 4px 14px;
            font-size: 12px; font-weight: 600; letter-spacing: 0.3px;
            background: rgba(30,77,58,0.10); color: var(--primary);
            line-height: 1.5;
        }
        .badge-gold {
            background: rgba(212,149,58,0.15); color: var(--secondary-dark);
        }
        .badge-hot {
            background: rgba(232,122,58,0.15); color: var(--accent);
        }

        /* ===== Card ===== */
        .card {
            background: var(--bg-white); border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm); transition: var(--transition);
            overflow: hidden; border: 1px solid var(--border-warm);
        }
        .card:hover {
            box-shadow: var(--shadow-md); transform: translateY(-4px);
        }
        .card-body { padding: 24px; }
        .card-img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; border-radius: var(--radius-lg) var(--radius-lg) 0 0; display: block; }
        @media (max-width: 768px) {
            .card-body { padding: 16px; }
        }

        /* ===== Section Spacing ===== */
        .section { padding: var(--spacing-section) 0; }
        .section-title { text-align: center; margin-bottom: 48px; }
        .section-title h2 { margin-bottom: 12px; }
        .section-title p { max-width: 640px; margin: 0 auto; color: var(--text-mid); font-size: 16px; }
        @media (max-width: 768px) {
            .section { padding: var(--spacing-section-mobile) 0; }
            .section-title { margin-bottom: 32px; }
            .section-title h2 { margin-bottom: 8px; }
        }

        /* ===== Navigation ===== */
        .site-header {
            position: sticky; top: 0; z-index: 1000;
            background: var(--bg-dark); height: var(--header-height);
            display: flex; align-items: center;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .header-inner {
            display: flex; align-items: center; justify-content: space-between;
            width: 100%; max-width: var(--max-width); margin: 0 auto;
            padding: 0 24px; height: 100%;
        }
        .site-logo {
            display: flex; align-items: center; gap: 10px;
            font-weight: 700; font-size: 20px; color: var(--text-white);
            flex-shrink: 0;
        }
        .logo-icon {
            width: 36px; height: 36px; background: var(--secondary);
            border-radius: 8px; display: flex; align-items: center; justify-content: center;
            font-size: 18px; font-weight: 700; color: var(--text-dark);
        }
        .nav-panel {
            display: flex; align-items: center; gap: 8px;
            background: rgba(255,255,255,0.06);
            border-radius: var(--radius-md); padding: 6px 10px;
            backdrop-filter: blur(8px); border: 1px solid rgba(255,255,255,0.08);
        }
        .nav-item {
            display: flex; align-items: center; gap: 6px;
            padding: 8px 16px; border-radius: var(--radius-sm);
            font-size: 14px; font-weight: 500; color: rgba(255,255,255,0.75);
            transition: var(--transition); min-height: 40px;
        }
        .nav-item i { font-size: 14px; }
        .nav-item:hover { color: var(--text-white); background: rgba(255,255,255,0.08); }
        .nav-item.active { color: var(--text-white); background: rgba(212,149,58,0.20); }
        .nav-cta .btn-cta { padding: 8px 20px; font-size: 13px; min-height: 38px; border-radius: var(--radius-sm); }
        .mobile-toggle { display: none; background: none; color: var(--text-white); font-size: 24px; cursor: pointer; padding: 4px; min-width: 44px; min-height: 44px; align-items: center; justify-content: center; border-radius: var(--radius-sm); }
        .mobile-toggle:hover { background: rgba(255,255,255,0.06); }
        @media (max-width: 900px) {
            .nav-panel { display: none; }
            .mobile-toggle { display: flex; }
            .header-inner { padding: 0 16px; }
            .nav-cta .btn-cta { padding: 6px 16px; font-size: 12px; min-height: 34px; }
        }
        .mobile-menu {
            display: none; position: fixed; top: var(--header-height); left: 0; right: 0;
            background: var(--bg-dark); padding: 16px 20px 24px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
            z-index: 999; box-shadow: 0 8px 32px rgba(0,0,0,0.3);
        }
        .mobile-menu.open { display: block; }
        .mobile-menu .nav-item {
            padding: 12px 16px; font-size: 15px; border-radius: var(--radius-sm);
            color: rgba(255,255,255,0.8);
        }
        .mobile-menu .nav-item i { width: 20px; text-align: center; }
        .mobile-menu .nav-item.active { background: rgba(212,149,58,0.18); color: var(--secondary); }

        /* ===== Hero ===== */
        .hero-banner {
            position: relative; min-height: 420px;
            display: flex; align-items: center;
            background: linear-gradient(135deg, var(--bg-dark) 0%, var(--primary) 100%);
            overflow: hidden;
        }
        .hero-banner::before {
            content: ''; position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            opacity: 0.15; mix-blend-mode: overlay;
        }
        .hero-banner .container { position: relative; z-index: 2; padding: 60px 24px; }
        .hero-banner h1 { color: var(--text-white); margin-bottom: 16px; max-width: 720px; }
        .hero-banner .hero-sub {
            font-size: 18px; color: var(--secondary); font-weight: 500;
            margin-bottom: 12px; letter-spacing: 0.3px;
        }
        .hero-banner p { color: rgba(255,255,255,0.80); font-size: 17px; max-width: 580px; line-height: 1.7; margin-bottom: 32px; }
        .hero-banner .btn-cta { font-size: 17px; padding: 16px 40px; }
        .hero-breadcrumb {
            display: flex; align-items: center; gap: 8px;
            font-size: 14px; color: rgba(255,255,255,0.55); margin-bottom: 20px;
        }
        .hero-breadcrumb a { color: rgba(255,255,255,0.65); }
        .hero-breadcrumb a:hover { color: var(--secondary); }
        .hero-breadcrumb span { color: rgba(255,255,255,0.8); }
        @media (max-width: 768px) {
            .hero-banner { min-height: 320px; }
            .hero-banner .container { padding: 40px 16px; }
            .hero-banner h1 { font-size: 30px; }
            .hero-banner .hero-sub { font-size: 16px; }
            .hero-banner p { font-size: 15px; }
            .hero-banner .btn-cta { font-size: 15px; padding: 14px 28px; width: 100%; }
        }

        /* ===== Grid / Layout ===== */
        .grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
        .grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 24px; }
        .grid-4 { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: 24px; }
        .flex-between { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px; }
        .text-center { text-align: center; }
        @media (max-width: 1024px) {
            .grid-4 { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; gap: 16px; }
        }

        /* ===== Stats ===== */
        .stats-row {
            display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
            background: var(--bg-white); border-radius: var(--radius-lg);
            padding: 32px 24px; box-shadow: var(--shadow-sm); border: 1px solid var(--border-warm);
        }
        .stat-item { text-align: center; }
        .stat-number {
            font-size: 64px; font-weight: 700; line-height: 1.1;
            color: var(--primary); font-family: var(--font-en);
            letter-spacing: -1px;
        }
        .stat-label { font-size: 15px; color: var(--text-mid); margin-top: 8px; font-weight: 500; }
        @media (max-width: 768px) {
            .stats-row { grid-template-columns: repeat(2, 1fr); gap: 16px; padding: 24px 16px; }
            .stat-number { font-size: 48px; }
            .stat-label { font-size: 14px; }
        }
        @media (max-width: 480px) {
            .stats-row { grid-template-columns: 1fr 1fr; }
        }

        /* ===== Feature Cards (2x2) ===== */
        .feature-grid-2x2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
        .feature-card {
            background: var(--bg-white); border-radius: var(--radius-lg);
            padding: 32px 28px; box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-warm); transition: var(--transition);
        }
        .feature-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
        .feature-icon {
            width: 56px; height: 56px; border-radius: 50%;
            background: rgba(30,77,58,0.08); display: flex;
            align-items: center; justify-content: center;
            margin-bottom: 16px; font-size: 24px; color: var(--primary);
        }
        .feature-card h3 { margin-bottom: 8px; font-size: 20px; }
        .feature-card p { color: var(--text-mid); font-size: 15px; line-height: 1.6; }
        @media (max-width: 768px) {
            .feature-grid-2x2 { grid-template-columns: 1fr; gap: 16px; }
            .feature-card { padding: 24px 20px; }
            .feature-icon { width: 48px; height: 48px; font-size: 20px; }
            .feature-card h3 { font-size: 18px; }
        }

        /* ===== Alternating Image-Text ===== */
        .alt-block { display: flex; align-items: center; gap: 48px; margin-bottom: 56px; }
        .alt-block.reverse { flex-direction: row-reverse; }
        .alt-text { flex: 1; }
        .alt-text h3 { margin-bottom: 12px; }
        .alt-text p { color: var(--text-mid); font-size: 15px; line-height: 1.7; margin-bottom: 16px; }
        .alt-text .link-more { color: var(--secondary); font-weight: 600; font-size: 14px; display: inline-flex; align-items: center; gap: 6px; }
        .alt-text .link-more:hover { color: var(--secondary-dark); gap: 10px; }
        .alt-img { flex: 1; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm); }
        .alt-img img { width: 100%; height: auto; aspect-ratio: 16 / 10; object-fit: cover; display: block; }
        @media (max-width: 900px) {
            .alt-block { flex-direction: column; gap: 24px; }
            .alt-block.reverse { flex-direction: column; }
            .alt-text h3 { font-size: 20px; }
        }

        /* ===== Feature/Capability Card ===== */
        .cap-card {
            background: var(--bg-white); border-radius: var(--radius-lg);
            padding: 28px 24px; box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-warm); transition: var(--transition);
            position: relative;
        }
        .cap-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
        .cap-card .badge { position: absolute; top: 16px; right: 16px; }
        .cap-card h3 { font-size: 18px; margin-bottom: 8px; }
        .cap-card p { color: var(--text-mid); font-size: 14px; line-height: 1.6; margin-bottom: 12px; }
        .cap-icon-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
        .cap-icon-list li {
            display: flex; align-items: center; gap: 6px;
            font-size: 13px; color: var(--text-mid); padding: 4px 10px;
            background: var(--bg-warm); border-radius: 20px;
        }
        .cap-icon-list li i { color: var(--primary); font-size: 12px; }

        /* ===== FAQ Accordion ===== */
        .faq-list { max-width: 720px; margin: 0 auto; }
        .faq-item { border-bottom: 1px solid var(--border-warm); }
        .faq-question {
            display: flex; align-items: center; justify-content: space-between;
            padding: 20px 0; cursor: pointer; font-size: 16px; font-weight: 600;
            color: var(--text-dark); transition: var(--transition); min-height: 56px;
            gap: 12px;
        }
        .faq-question:hover { color: var(--primary); }
        .faq-question i { font-size: 14px; color: var(--text-light); transition: var(--transition); flex-shrink: 0; }
        .faq-item.open .faq-question i { transform: rotate(180deg); color: var(--primary); }
        .faq-answer {
            max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0;
        }
        .faq-item.open .faq-answer {
            max-height: 300px; padding: 0 0 20px 0;
        }
        .faq-answer p { color: var(--text-mid); font-size: 15px; line-height: 1.7; }

        /* ===== Form / Contact ===== */
        .contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
        .form-group { margin-bottom: 20px; }
        .form-group label { display: block; font-size: 14px; color: var(--text-mid); margin-bottom: 6px; font-weight: 500; }
        .form-group input, .form-group textarea {
            width: 100%; padding: 12px 16px; border: 1px solid var(--border-input);
            border-radius: 10px; font-size: 15px; color: var(--text-dark);
            background: var(--bg-white); transition: var(--transition);
            font-family: var(--font-sans);
        }
        .form-group input:focus, .form-group textarea:focus {
            border-color: var(--primary); box-shadow: 0 0 0 3px rgba(30,77,58,0.10);
        }
        .form-group textarea { min-height: 120px; resize: vertical; }
        .form-group .error { border-color: var(--accent); }
        .form-group .error-text { font-size: 12px; color: var(--accent); margin-top: 4px; display: none; }
        .contact-info { padding: 32px; background: var(--bg-white); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); border: 1px solid var(--border-warm); }
        .contact-info h3 { margin-bottom: 16px; }
        .contact-info li { display: flex; align-items: flex-start; gap: 12px; margin-bottom: 16px; font-size: 15px; color: var(--text-mid); }
        .contact-info li i { width: 20px; color: var(--primary); font-size: 16px; margin-top: 2px; }
        @media (max-width: 768px) {
            .contact-grid { grid-template-columns: 1fr; gap: 32px; }
            .contact-info { padding: 24px 20px; }
        }

        /* ===== Latest News Cards ===== */
        .news-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .news-card .card-body { padding: 20px; }
        .news-card .card-body .badge { margin-bottom: 10px; }
        .news-card .card-body h3 { font-size: 16px; font-weight: 600; margin-bottom: 6px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .news-card .card-body p { font-size: 14px; color: var(--text-mid); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 8px; }
        .news-card .card-body .meta-date { font-size: 12px; color: var(--text-light); }
        .news-card .card-body .read-more { font-size: 13px; color: var(--secondary); font-weight: 600; display: inline-flex; align-items: center; gap: 4px; margin-top: 8px; }
        .news-card .card-body .read-more:hover { color: var(--secondary-dark); }
        .empty-state {
            grid-column: 1 / -1; padding: 48px 24px; text-align: center;
            background: var(--bg-warm); border-radius: var(--radius-lg);
            border: 2px dashed var(--border-input); color: var(--text-light);
        }
        .empty-state i { font-size: 40px; margin-bottom: 12px; opacity: 0.5; }
        .empty-state p { font-size: 15px; }
        @media (max-width: 1024px) {
            .news-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .news-grid { grid-template-columns: 1fr; gap: 16px; }
        }

        /* ===== CTA ===== */
        .cta-block {
            background: linear-gradient(135deg, var(--bg-dark) 0%, var(--primary) 100%);
            border-radius: var(--radius-lg); padding: 64px 48px; text-align: center;
            position: relative; overflow: hidden;
        }
        .cta-block::before {
            content: ''; position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            opacity: 0.08; mix-blend-mode: overlay;
        }
        .cta-block .container { position: relative; z-index: 2; }
        .cta-block h2 { color: var(--text-white); margin-bottom: 12px; }
        .cta-block p { color: rgba(255,255,255,0.80); font-size: 17px; max-width: 560px; margin: 0 auto 28px; }
        .cta-block .btn-cta { font-size: 18px; padding: 16px 48px; }
        @media (max-width: 768px) {
            .cta-block { padding: 40px 24px; }
            .cta-block h2 { font-size: 24px; }
            .cta-block p { font-size: 15px; }
            .cta-block .btn-cta { width: 100%; font-size: 16px; padding: 14px 24px; }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark); color: rgba(255,255,255,0.7);
            padding: 56px 0 0; border-top: 1px solid rgba(255,255,255,0.04);
        }
        .footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 48px; margin-bottom: 40px; }
        .footer-brand .site-logo { margin-bottom: 16px; font-size: 18px; }
        .footer-brand p { font-size: 14px; line-height: 1.7; color: rgba(255,255,255,0.55); max-width: 360px; }
        .footer-col h4 { color: var(--text-white); font-size: 16px; margin-bottom: 16px; font-weight: 600; }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a { color: rgba(255,255,255,0.55); font-size: 14px; display: inline-flex; align-items: center; gap: 8px; }
        .footer-col ul li a:hover { color: var(--secondary); }
        .footer-social { display: flex; gap: 12px; margin-top: 16px; }
        .footer-social a {
            width: 40px; height: 40px; border-radius: 50%;
            border: 1px solid rgba(255,255,255,0.15);
            display: flex; align-items: center; justify-content: center;
            color: rgba(255,255,255,0.5); font-size: 16px; transition: var(--transition);
        }
        .footer-social a:hover { border-color: var(--secondary); color: var(--secondary); background: rgba(212,149,58,0.10); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding: 20px 0; text-align: center;
            font-size: 13px; color: rgba(255,255,255,0.35);
        }
        @media (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr; gap: 32px; }
            .footer-brand p { max-width: 100%; }
            .footer-social { gap: 8px; }
            .footer-social a { width: 36px; height: 36px; font-size: 14px; }
        }

        /* ===== Back to Top ===== */
        .back-to-top {
            position: fixed; bottom: 32px; right: 32px; z-index: 900;
            width: 48px; height: 48px; border-radius: 50%;
            background: var(--secondary); color: var(--text-dark);
            display: flex; align-items: center; justify-content: center;
            font-size: 18px; box-shadow: var(--shadow-sm);
            cursor: pointer; transition: var(--transition); opacity: 0; visibility: hidden;
            border: none;
        }
        .back-to-top.visible { opacity: 1; visibility: visible; }
        .back-to-top:hover { background: var(--secondary-dark); transform: translateY(-2px); box-shadow: var(--shadow-md); }
        @media (max-width: 768px) {
            .back-to-top { bottom: 20px; right: 20px; width: 44px; height: 44px; font-size: 16px; }
        }

        /* ===== Additional ===== */
        .spacer { height: 1px; background: var(--border-warm); margin: 40px 0; }
        .tag-list { display: flex; flex-wrap: wrap; gap: 10px; margin: 16px 0; }
        .tag-list .badge { font-size: 13px; padding: 6px 16px; }
        .section-bg-alt { background: var(--bg-white); }

        /* ===== Data Service Specific ===== */
        .data-cap-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
        @media (max-width: 1024px) {
            .data-cap-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .data-cap-grid { grid-template-columns: 1fr; }
        }

        .flow-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: step; }
        .flow-step {
            background: var(--bg-white); border-radius: var(--radius-lg);
            padding: 28px 20px; text-align: center; box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-warm); transition: var(--transition);
            position: relative;
        }
        .flow-step:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .flow-step .step-num {
            width: 48px; height: 48px; border-radius: 50%;
            background: var(--primary); color: var(--text-white);
            display: flex; align-items: center; justify-content: center;
            font-size: 20px; font-weight: 700; margin: 0 auto 12px;
            font-family: var(--font-en);
        }
        .flow-step h4 { font-size: 16px; margin-bottom: 6px; }
        .flow-step p { font-size: 14px; color: var(--text-mid); line-height: 1.5; }
        @media (max-width: 1024px) {
            .flow-steps { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            .flow-steps { grid-template-columns: 1fr; gap: 16px; }
            .flow-step { padding: 20px 16px; }
        }

        .use-case-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
        .use-case-item {
            display: flex; gap: 16px; align-items: flex-start;
            background: var(--bg-white); border-radius: var(--radius-md);
            padding: 24px 20px; box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-warm); transition: var(--transition);
        }
        .use-case-item:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
        .use-case-item .uc-icon {
            width: 48px; height: 48px; border-radius: 12px;
            background: rgba(30,77,58,0.08); display: flex;
            align-items: center; justify-content: center;
            font-size: 20px; color: var(--primary); flex-shrink: 0;
        }
        .use-case-item h4 { font-size: 16px; margin-bottom: 4px; }
        .use-case-item p { font-size: 14px; color: var(--text-mid); line-height: 1.5; }
        @media (max-width: 768px) {
            .use-case-grid { grid-template-columns: 1fr; gap: 16px; }
            .use-case-item { padding: 18px 16px; }
        }

        /* ===== Focus / Accessibility ===== */
        a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible { outline: 2px solid var(--secondary); outline-offset: 2px; }
        .skip-link { position: absolute; top: -100px; left: 8px; background: var(--secondary); color: var(--text-dark); padding: 8px 16px; border-radius: 4px; z-index: 9999; font-weight: 600; }
        .skip-link:focus { top: 8px; }