/* roulang page: index */
:root {
            --brand-dark: #0c2b26;
            --brand-primary: #1a5e54;
            --brand-teal: #2d8c7a;
            --brand-light: #e8f4f1;
            --brand-gold: #d4a853;
            --brand-gold-light: #f0dfb6;
            --brand-gradient: linear-gradient(135deg, #0c2b26 0%, #1a5e54 55%, #2d8c7a 100%);
            --brand-gradient-dark: linear-gradient(135deg, #081d19 0%, #0c2b26 50%, #153d38 100%);
            --brand-gradient-soft: linear-gradient(135deg, #e8f4f1 0%, #d0e9e2 100%);
            --text-primary: #1a1a1a;
            --text-secondary: #4a4a4a;
            --text-muted: #777;
            --text-on-dark: #f4faf8;
            --text-on-dark-muted: #b8ccc8;
            --bg-page: #fafbf8;
            --bg-section: #ffffff;
            --bg-alt: #f3f7f5;
            --border-color: #e2e8e5;
            --border-dark: #c5d5d0;
            --radius-sm: 10px;
            --radius-md: 18px;
            --radius-lg: 26px;
            --radius-xl: 32px;
            --radius-full: 9999px;
            --shadow-xs: 0 1px 3px rgba(0, 0, 0, 0.05);
            --shadow-sm: 0 4px 14px rgba(0, 0, 0, 0.07);
            --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.1);
            --shadow-lg: 0 18px 50px rgba(0, 0, 0, 0.14);
            --shadow-brand: 0 8px 24px rgba(26, 94, 84, 0.18);
            --font-body: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s ease;
            --transition-slow: 0.45s ease;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--bg-page);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

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

        a {
            color: var(--brand-primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover,
        a:focus {
            color: var(--brand-teal);
            text-decoration: none;
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 3px solid var(--brand-gold);
            outline-offset: 2px;
        }

        button {
            font-family: var(--font-body);
        }

        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-body);
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-primary);
            margin-top: 0;
        }

        h1 { font-size: 2.4rem; letter-spacing: -0.02em; }
        h2 { font-size: 1.9rem; letter-spacing: -0.01em; }
        h3 { font-size: 1.35rem; }
        h4 { font-size: 1.1rem; }
        h5 { font-size: 1rem; }
        h6 { font-size: 0.9rem; }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .container-narrow {
            max-width: 960px;
        }

        .section-padding {
            padding-top: 72px;
            padding-bottom: 72px;
        }

        .section-padding-sm {
            padding-top: 48px;
            padding-bottom: 48px;
        }

        .section-padding-lg {
            padding-top: 96px;
            padding-bottom: 96px;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--brand-teal);
            background: var(--brand-light);
            padding: 6px 16px;
            border-radius: var(--radius-full);
            letter-spacing: 0.04em;
            margin-bottom: 16px;
        }

        .section-label .icon {
            font-size: 0.8rem;
            color: var(--brand-gold);
        }

        .section-title {
            font-size: 1.9rem;
            margin-bottom: 14px;
            color: var(--text-primary);
        }

        .section-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 780px;
            margin-bottom: 0;
            line-height: 1.85;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--brand-gradient);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
            transition: box-shadow var(--transition-base), background var(--transition-base);
        }

        .site-header.scrolled {
            box-shadow: 0 6px 32px rgba(0, 0, 0, 0.22);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 68px;
            gap: 20px;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.02em;
            white-space: nowrap;
            transition: opacity var(--transition-fast);
        }

        .site-logo:hover,
        .site-logo:focus {
            color: #fff;
            opacity: 0.85;
        }

        .site-logo .logo-icon {
            width: 38px;
            height: 38px;
            background: rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            color: var(--brand-gold);
            flex-shrink: 0;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-menu li {
            margin: 0;
        }

        .nav-link {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 10px 18px;
            font-size: 0.95rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.85);
            border-radius: var(--radius-full);
            transition: background var(--transition-fast), color var(--transition-fast);
            white-space: nowrap;
        }

        .nav-link:hover,
        .nav-link:focus {
            color: #fff;
            background: rgba(255, 255, 255, 0.14);
        }

        .nav-link.active {
            color: #fff;
            background: rgba(255, 255, 255, 0.18);
            font-weight: 600;
        }

        .nav-cta {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--brand-dark);
            background: var(--brand-gold);
            border: none;
            border-radius: var(--radius-full);
            cursor: pointer;
            transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
            white-space: nowrap;
        }

        .nav-cta:hover,
        .nav-cta:focus {
            background: var(--brand-gold-light);
            color: var(--brand-dark);
            box-shadow: 0 4px 16px rgba(212, 168, 83, 0.35);
            transform: translateY(-1px);
        }

        .nav-burger {
            display: none;
            width: 44px;
            height: 44px;
            background: rgba(255, 255, 255, 0.12);
            border: none;
            border-radius: var(--radius-sm);
            color: #fff;
            font-size: 1.2rem;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: background var(--transition-fast);
        }

        .nav-burger:hover {
            background: rgba(255, 255, 255, 0.22);
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            padding: 80px 0 90px;
            background-image: linear-gradient(rgba(8, 29, 25, 0.85), rgba(12, 43, 38, 0.92)), url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            color: var(--text-on-dark);
            overflow: hidden;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg-page) 0%, transparent 100%);
            pointer-events: none;
            z-index: 2;
        }

        .hero .container {
            position: relative;
            z-index: 3;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 52px;
            align-items: center;
        }

        .hero-content {
            padding-right: 10px;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--brand-gold-light);
            background: rgba(212, 168, 83, 0.12);
            border: 1px solid rgba(212, 168, 83, 0.28);
            padding: 7px 16px;
            border-radius: var(--radius-full);
            margin-bottom: 22px;
            letter-spacing: 0.04em;
        }

        .hero-title {
            font-size: 2.55rem;
            line-height: 1.25;
            color: #fff;
            margin-bottom: 20px;
            letter-spacing: -0.015em;
        }

        .hero-desc {
            font-size: 1.08rem;
            color: var(--text-on-dark-muted);
            line-height: 1.85;
            max-width: 520px;
            margin-bottom: 30px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 36px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 28px;
            font-size: 0.98rem;
            font-weight: 600;
            border: none;
            border-radius: var(--radius-full);
            cursor: pointer;
            transition: all var(--transition-base);
            text-align: center;
            line-height: 1.4;
        }

        .btn-primary {
            background: var(--brand-gold);
            color: var(--brand-dark);
            box-shadow: 0 4px 16px rgba(212, 168, 83, 0.3);
        }

        .btn-primary:hover,
        .btn-primary:focus {
            background: var(--brand-gold-light);
            color: var(--brand-dark);
            box-shadow: 0 8px 26px rgba(212, 168, 83, 0.42);
            transform: translateY(-2px);
        }

        .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 1.5px solid rgba(255, 255, 255, 0.4);
        }

        .btn-outline-light:hover,
        .btn-outline-light:focus {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.7);
            color: #fff;
            transform: translateY(-2px);
        }

        .btn-solid-teal {
            background: var(--brand-teal);
            color: #fff;
            box-shadow: 0 4px 16px rgba(45, 140, 122, 0.3);
        }

        .btn-solid-teal:hover,
        .btn-solid-teal:focus {
            background: #249880;
            color: #fff;
            box-shadow: 0 8px 24px rgba(45, 140, 122, 0.4);
            transform: translateY(-2px);
        }

        .hero-kpis {
            display: flex;
            flex-wrap: wrap;
            gap: 28px;
        }

        .hero-kpi {
            display: flex;
            flex-direction: column;
        }

        .hero-kpi-value {
            font-size: 1.8rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.01em;
            line-height: 1.2;
        }

        .hero-kpi-unit {
            font-size: 0.8rem;
            color: var(--brand-gold);
            font-weight: 600;
            margin-left: 3px;
        }

        .hero-kpi-label {
            font-size: 0.82rem;
            color: var(--text-on-dark-muted);
            margin-top: 4px;
        }

        .hero-visual {
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .hero-phone-card {
            position: relative;
            width: 320px;
            max-width: 100%;
            border-radius: 32px;
            overflow: hidden;
            box-shadow: var(--shadow-lg), 0 0 0 6px rgba(255, 255, 255, 0.06);
            background: #0c1f1b;
            aspect-ratio: 9 / 16;
            transition: transform var(--transition-slow), box-shadow var(--transition-slow);
        }

        .hero-phone-card:hover {
            transform: translateY(-6px) scale(1.01);
            box-shadow: 0 24px 60px rgba(0, 0, 0, 0.25), 0 0 0 6px rgba(255, 255, 255, 0.1);
        }

        .hero-phone-card img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.9;
        }

        .hero-phone-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 40px 22px 22px;
            background: linear-gradient(to top, rgba(8, 20, 17, 0.95) 0%, rgba(8, 20, 17, 0.6) 55%, transparent 100%);
        }

        .hero-phone-overlay .tag {
            display: inline-block;
            font-size: 0.72rem;
            font-weight: 600;
            color: var(--brand-gold-light);
            background: rgba(212, 168, 83, 0.2);
            padding: 4px 12px;
            border-radius: var(--radius-full);
            margin-bottom: 10px;
        }

        .hero-phone-overlay .title {
            font-size: 1.1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 6px;
        }

        .hero-phone-overlay .sub {
            font-size: 0.78rem;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.5;
        }

        /* ===== 优惠阶梯 ===== */
        .ladder {
            background: var(--bg-section);
        }

        .ladder-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 26px;
            margin-top: 40px;
        }

        .ladder-card {
            position: relative;
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
            display: flex;
            flex-direction: column;
        }

        .ladder-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: var(--brand-teal);
        }

        .ladder-card.featured {
            border: 2px solid var(--brand-gold);
            box-shadow: var(--shadow-brand);
        }

        .ladder-card-badge {
            position: absolute;
            top: 16px;
            right: 16px;
            z-index: 3;
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--brand-dark);
            background: var(--brand-gold);
            padding: 5px 14px;
            border-radius: var(--radius-full);
            letter-spacing: 0.03em;
        }

        .ladder-card-img {
            height: 190px;
            overflow: hidden;
            position: relative;
        }

        .ladder-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .ladder-card:hover .ladder-card-img img {
            transform: scale(1.04);
        }

        .ladder-card-img::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 70px;
            background: linear-gradient(to top, rgba(255, 255, 255, 0.96), transparent);
        }

        .ladder-card-body {
            padding: 4px 24px 26px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .ladder-card-body .price {
            font-size: 1.9rem;
            font-weight: 700;
            color: var(--brand-primary);
            line-height: 1.2;
            margin-bottom: 4px;
        }

        .ladder-card-body .price small {
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-muted);
        }

        .ladder-card-body .name {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 10px;
        }

        .ladder-card-body .desc {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
            flex-grow: 1;
        }

        .ladder-card-body .features {
            list-style: none;
            margin: 0 0 18px;
            padding: 0;
        }

        .ladder-card-body .features li {
            display: flex;
            align-items: flex-start;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-secondary);
            padding: 5px 0;
        }

        .ladder-card-body .features li .check {
            color: var(--brand-teal);
            font-size: 0.8rem;
            flex-shrink: 0;
            margin-top: 4px;
        }

        .ladder-card-body .btn {
            width: 100%;
            font-size: 0.92rem;
            padding: 12px 20px;
        }

        /* ===== 套餐对比 ===== */
        .compare {
            background: var(--bg-alt);
        }

        .compare-table-wrap {
            margin-top: 40px;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-color);
        }

        .compare-table {
            width: 100%;
            border-collapse: collapse;
            background: #fff;
            font-size: 0.92rem;
        }

        .compare-table th,
        .compare-table td {
            padding: 16px 20px;
            text-align: left;
            border-bottom: 1px solid var(--border-color);
        }

        .compare-table thead th {
            background: var(--brand-gradient);
            color: #fff;
            font-weight: 600;
            font-size: 0.9rem;
            letter-spacing: 0.03em;
            white-space: nowrap;
        }

        .compare-table thead th .sub {
            display: block;
            font-size: 0.75rem;
            font-weight: 400;
            color: var(--text-on-dark-muted);
            margin-top: 3px;
        }

        .compare-table tbody th {
            font-weight: 600;
            color: var(--text-primary);
            background: var(--brand-light);
            width: 180px;
            white-space: nowrap;
        }

        .compare-table tbody td {
            color: var(--text-secondary);
            text-align: center;
        }

        .compare-table tbody tr:last-child th,
        .compare-table tbody tr:last-child td {
            border-bottom: none;
        }

        .compare-table .included {
            color: var(--brand-teal);
            font-weight: 600;
        }

        .compare-table .not-included {
            color: #bbb;
        }

        .compare-table .price-cell {
            font-weight: 700;
            color: var(--brand-primary);
            font-size: 1.1rem;
        }

        /* ===== 保障条 ===== */
        .guarantee {
            background: var(--bg-section);
            padding-top: 48px;
            padding-bottom: 48px;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .guarantee-item {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 10px 6px;
        }

        .guarantee-item .icon-circle {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--brand-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--brand-teal);
            flex-shrink: 0;
            transition: background var(--transition-fast), transform var(--transition-fast);
        }

        .guarantee-item:hover .icon-circle {
            background: var(--brand-teal);
            color: #fff;
            transform: scale(1.05);
        }

        .guarantee-item .info h4 {
            font-size: 0.95rem;
            margin-bottom: 4px;
        }

        .guarantee-item .info p {
            font-size: 0.82rem;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.55;
        }

        /* ===== 资讯区 ===== */
        .news {
            background: var(--bg-page);
        }

        .news-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr;
            gap: 32px;
            margin-top: 36px;
        }

        .news-list {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .news-list-item a {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 18px 22px;
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            color: var(--text-primary);
            transition: all var(--transition-base);
        }

        .news-list-item a:hover,
        .news-list-item a:focus {
            border-color: var(--brand-teal);
            box-shadow: var(--shadow-sm);
            color: var(--brand-primary);
            transform: translateX(4px);
        }

        .news-list-item .news-date {
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--brand-teal);
            background: var(--brand-light);
            padding: 5px 12px;
            border-radius: var(--radius-full);
            white-space: nowrap;
            flex-shrink: 0;
        }

        .news-list-item .news-title {
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-primary);
            line-height: 1.5;
        }

        .news-list-item .news-arrow {
            margin-left: auto;
            color: #c0c0c0;
            font-size: 0.8rem;
            transition: color var(--transition-fast), transform var(--transition-fast);
        }

        .news-list-item a:hover .news-arrow {
            color: var(--brand-teal);
            transform: translateX(3px);
        }

        .news-sidebar {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .news-sidebar-card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-xs);
            transition: transform var(--transition-base), box-shadow var(--transition-base);
        }

        .news-sidebar-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-sm);
        }

        .news-sidebar-card img {
            width: 100%;
            height: 140px;
            object-fit: cover;
        }

        .news-sidebar-card .card-body {
            padding: 16px 20px 18px;
        }

        .news-sidebar-card .card-body .tag {
            font-size: 0.72rem;
            font-weight: 600;
            color: var(--brand-teal);
            background: var(--brand-light);
            padding: 3px 10px;
            border-radius: var(--radius-full);
            display: inline-block;
            margin-bottom: 8px;
        }

        .news-sidebar-card .card-body h4 {
            font-size: 0.95rem;
            margin-bottom: 6px;
            line-height: 1.45;
        }

        .news-sidebar-card .card-body p {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.55;
        }

        /* ===== 限时入口 / CTA ===== */
        .cta-section {
            background-image: linear-gradient(rgba(8, 29, 25, 0.92), rgba(12, 43, 38, 0.95)), url('/assets/images/backpic/back-7.webp');
            background-size: cover;
            background-position: center;
            color: var(--text-on-dark);
            padding: 80px 0;
        }

        .cta-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .cta-content h2 {
            color: #fff;
            font-size: 1.9rem;
            margin-bottom: 16px;
        }

        .cta-content p {
            color: var(--text-on-dark-muted);
            font-size: 1rem;
            line-height: 1.8;
            margin-bottom: 24px;
            max-width: 480px;
        }

        .cta-highlights {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 26px;
        }

        .cta-highlights span {
            font-size: 0.82rem;
            font-weight: 500;
            color: var(--brand-gold-light);
            background: rgba(212, 168, 83, 0.12);
            border: 1px solid rgba(212, 168, 83, 0.25);
            padding: 7px 14px;
            border-radius: var(--radius-full);
        }

        .cta-form-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 36px 32px;
            box-shadow: var(--shadow-lg);
            color: var(--text-primary);
        }

        .cta-form-card h3 {
            font-size: 1.25rem;
            margin-bottom: 6px;
        }

        .cta-form-card .form-sub {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 22px;
        }

        .form-group {
            margin-bottom: 16px;
        }

        .form-group label {
            display: block;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-secondary);
            margin-bottom: 6px;
        }

        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px 16px;
            font-size: 0.92rem;
            font-family: var(--font-body);
            border: 1.5px solid var(--border-dark);
            border-radius: var(--radius-sm);
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
            background: #fafbfa;
            color: var(--text-primary);
        }

        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: var(--brand-teal);
            box-shadow: 0 0 0 3px rgba(45, 140, 122, 0.12);
            outline: none;
            background: #fff;
        }

        .form-group textarea {
            min-height: 80px;
            resize: vertical;
        }

        .form-submit {
            width: 100%;
            padding: 14px;
            font-size: 0.98rem;
            font-weight: 600;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-section);
        }

        .faq-list {
            margin-top: 36px;
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 800px;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }

        .faq-item:hover {
            border-color: var(--brand-teal);
            box-shadow: var(--shadow-xs);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 24px;
            background: none;
            border: none;
            cursor: pointer;
            font-family: var(--font-body);
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-primary);
            text-align: left;
            transition: background var(--transition-fast);
        }

        .faq-question:hover {
            background: var(--brand-light);
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            font-size: 0.9rem;
            color: var(--brand-teal);
            transition: transform var(--transition-base);
        }

        .faq-item.open .faq-question .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
            padding: 0 24px;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        .faq-answer p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.75;
            margin: 0;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--brand-gradient-dark);
            color: var(--text-on-dark-muted);
            padding-top: 56px;
            padding-bottom: 28px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }

        .footer-brand .logo .logo-icon {
            width: 34px;
            height: 34px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--brand-gold);
        }

        .footer-brand .desc {
            font-size: 0.88rem;
            color: var(--text-on-dark-muted);
            line-height: 1.75;
            max-width: 340px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 0.95rem;
            margin-bottom: 16px;
            letter-spacing: 0.03em;
        }

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

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            font-size: 0.85rem;
            color: var(--text-on-dark-muted);
            transition: color var(--transition-fast);
        }

        .footer-links a:hover,
        .footer-links a:focus {
            color: var(--brand-gold-light);
        }

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

        .footer-contact li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 0.85rem;
            color: var(--text-on-dark-muted);
            margin-bottom: 10px;
        }

        .footer-contact li .icon {
            color: var(--brand-gold);
            flex-shrink: 0;
            margin-top: 3px;
            font-size: 0.82rem;
        }

        .footer-bottom {
            padding-top: 22px;
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
            justify-content: space-between;
        }

        .footer-bottom .copyright {
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.45);
        }

        .footer-bottom .copyright a {
            color: rgba(255, 255, 255, 0.55);
        }

        .footer-bottom .copyright a:hover {
            color: var(--brand-gold-light);
        }

        /* ===== 案例故事 ===== */
        .story-section {
            background: var(--bg-alt);
        }

        .story-card {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0;
            background: #fff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            margin-top: 36px;
            border: 1px solid var(--border-color);
        }

        .story-card-img {
            min-height: 320px;
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .story-card-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to right, transparent 60%, rgba(255, 255, 255, 0.6));
        }

        .story-card-body {
            padding: 40px 36px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .story-card-body .tag {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--brand-teal);
            background: var(--brand-light);
            padding: 4px 12px;
            border-radius: var(--radius-full);
            display: inline-block;
            margin-bottom: 12px;
            width: fit-content;
        }

        .story-card-body h3 {
            font-size: 1.3rem;
            margin-bottom: 14px;
        }

        .story-card-body p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 18px;
        }

        .story-metrics {
            display: flex;
            gap: 28px;
            flex-wrap: wrap;
            margin-bottom: 18px;
        }

        .story-metric {
            display: flex;
            flex-direction: column;
        }

        .story-metric .value {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--brand-primary);
            line-height: 1.3;
        }

        .story-metric .label {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            h1 { font-size: 2.1rem; }
            h2 { font-size: 1.7rem; }
            .section-padding { padding-top: 56px; padding-bottom: 56px; }
            .section-padding-lg { padding-top: 72px; padding-bottom: 72px; }
            .hero { padding: 56px 0 70px; }
            .hero-grid { grid-template-columns: 1fr; gap: 40px; }
            .hero-content { padding-right: 0; }
            .hero-desc { max-width: 100%; }
            .hero-phone-card { width: 260px; }
            .ladder-grid { grid-template-columns: repeat(3, 1fr); gap: 18px; }
            .ladder-card-body { padding: 4px 18px 20px; }
            .news-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
            .cta-grid { grid-template-columns: 1fr; gap: 32px; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
        }

        @media (max-width: 768px) {
            h1 { font-size: 1.75rem; }
            h2 { font-size: 1.5rem; }
            h3 { font-size: 1.15rem; }
            .container { padding-left: 16px; padding-right: 16px; }
            .section-padding { padding-top: 44px; padding-bottom: 44px; }
            .section-padding-lg { padding-top: 56px; padding-bottom: 56px; }
            .hero { padding: 40px 0 56px; }
            .hero-title { font-size: 1.9rem; }
            .hero-desc { font-size: 0.98rem; }
            .hero-kpis { gap: 20px; }
            .hero-kpi-value { font-size: 1.4rem; }
            .hero-phone-card { width: 220px; }
            .nav-menu { display: none; }
            .nav-burger { display: flex; }
            .nav-menu.open { display: flex; flex-direction: column; position: absolute; top: 68px; left: 0; right: 0; background: var(--brand-gradient-dark); padding: 16px 20px 24px; gap: 4px; box-shadow: 0 12px 30px rgba(0, 0, 0, 0.2); z-index: 99; }
            .nav-menu.open li { width: 100%; }
            .nav-menu.open .nav-link { width: 100%; padding: 12px 18px; }
            .nav-cta { padding: 9px 18px; font-size: 0.82rem; }
            .ladder-grid { grid-template-columns: 1fr; gap: 20px; }
            .ladder-card-body .desc { font-size: 0.88rem; }
            .compare-table-wrap { overflow-x: auto; }
            .compare-table { min-width: 580px; }
            .guarantee-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
            .news-grid { grid-template-columns: 1fr; gap: 20px; }
            .news-sidebar { flex-direction: row; flex-wrap: wrap; }
            .news-sidebar-card { flex: 1 1 45%; min-width: 220px; }
            .story-card { grid-template-columns: 1fr; }
            .story-card-img { min-height: 200px; }
            .story-card-img::after { background: linear-gradient(to top, rgba(255, 255, 255, 0.7), transparent 50%); }
            .story-card-body { padding: 24px 20px; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; padding-bottom: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .cta-form-card { padding: 28px 22px; }
        }

        @media (max-width: 520px) {
            h1 { font-size: 1.55rem; }
            h2 { font-size: 1.35rem; }
            h3 { font-size: 1.05rem; }
            .section-padding { padding-top: 36px; padding-bottom: 36px; }
            .section-padding-lg { padding-top: 44px; padding-bottom: 44px; }
            .hero { padding: 32px 0 48px; }
            .hero-title { font-size: 1.6rem; }
            .hero-desc { font-size: 0.92rem; line-height: 1.75; }
            .hero-actions { flex-direction: column; gap: 10px; }
            .hero-actions .btn { width: 100%; }
            .hero-kpi-value { font-size: 1.2rem; }
            .hero-phone-card { width: 180px; border-radius: 22px; }
            .section-title { font-size: 1.35rem; }
            .section-desc { font-size: 0.92rem; }
            .guarantee-grid { grid-template-columns: 1fr; gap: 8px; }
            .guarantee-item .icon-circle { width: 42px; height: 42px; font-size: 1rem; }
            .news-list-item a { flex-wrap: wrap; gap: 10px; padding: 14px 16px; }
            .news-list-item .news-date { font-size: 0.72rem; padding: 4px 10px; }
            .news-list-item .news-title { font-size: 0.85rem; }
            .news-sidebar { flex-direction: column; }
            .news-sidebar-card { min-width: 100%; }
            .cta-section { padding: 52px 0; }
            .cta-content h2 { font-size: 1.4rem; }
            .cta-form-card { border-radius: var(--radius-md); }
            .faq-question { padding: 14px 18px; font-size: 0.88rem; }
            .faq-answer { padding: 0 18px; }
            .faq-item.open .faq-answer { padding: 0 18px 16px; }
            .site-logo { font-size: 1.1rem; }
            .site-logo .logo-icon { width: 32px; height: 32px; font-size: 0.85rem; }
            .nav-wrapper { min-height: 58px; }
            .nav-menu.open { top: 58px; }
            .btn { padding: 11px 22px; font-size: 0.9rem; }
            .story-metrics { gap: 18px; }
            .story-metric .value { font-size: 1.15rem; }
            .ladder-card-img { height: 160px; }
        }