/* roulang page: index */
:root {
            --primary: #1e5eff;
            --primary-dark: #0d2b6b;
            --primary-light: #e8eeff;
            --accent: #c9a86c;
            --accent-light: #f5efe2;
            --bg: #f7f9fc;
            --bg-white: #ffffff;
            --text: #1a1f36;
            --text-secondary: #55607a;
            --text-muted: #8b94ad;
            --border: #e4e8f0;
            --border-light: #eef1f7;
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 8px rgba(13, 43, 107, 0.06);
            --shadow-md: 0 8px 28px rgba(13, 43, 107, 0.1);
            --shadow-lg: 0 18px 48px rgba(13, 43, 107, 0.14);
            --shadow-xl: 0 28px 64px rgba(13, 43, 107, 0.18);
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 64px;
            --spacing-xxl: 88px;
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

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

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg);
            color: var(--text);
            font-size: 16px;
            line-height: 1.7;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
        }

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

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

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 3px solid rgba(30, 94, 255, 0.35);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

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

        /* ===== Header / Nav ===== */
        .site-header {
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: 0;
            z-index: 1050;
            transition: var(--transition);
        }

        .site-header.scrolled {
            box-shadow: var(--shadow-md);
            border-bottom-color: transparent;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 68px;
            gap: var(--spacing-md);
            flex-wrap: nowrap;
        }

        .brand-logo {
            font-weight: 700;
            font-size: 15px;
            color: var(--primary-dark);
            letter-spacing: -0.01em;
            line-height: 1.3;
            white-space: nowrap;
            max-width: 280px;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .brand-logo .logo-accent {
            color: var(--primary);
        }

        .brand-logo:hover {
            color: var(--primary-dark);
        }

        .nav-search-wrapper {
            flex: 1;
            max-width: 420px;
            min-width: 180px;
            position: relative;
        }

        .nav-search-wrapper .form-control {
            border-radius: 50px;
            border: 1.5px solid var(--border);
            padding: 10px 42px 10px 18px;
            font-size: 14px;
            background: var(--bg);
            transition: var(--transition);
            height: 44px;
        }

        .nav-search-wrapper .form-control:focus {
            border-color: var(--primary);
            background: #fff;
            box-shadow: 0 0 0 4px rgba(30, 94, 255, 0.12);
        }

        .nav-search-wrapper .search-btn {
            position: absolute;
            right: 4px;
            top: 50%;
            transform: translateY(-50%);
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 50%;
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
            cursor: pointer;
        }

        .nav-search-wrapper .search-btn:hover {
            background: var(--primary-dark);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
        }

        .main-nav .nav-link-item {
            display: inline-flex;
            align-items: center;
            padding: 10px 18px;
            font-weight: 500;
            font-size: 14px;
            color: var(--text-secondary);
            border-radius: 50px;
            transition: var(--transition);
            white-space: nowrap;
        }

        .main-nav .nav-link-item:hover {
            color: var(--primary);
            background: var(--primary-light);
        }

        .main-nav .nav-link-item.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 4px 14px rgba(30, 94, 255, 0.3);
        }

        .navbar-toggler-custom {
            display: none;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 8px 12px;
            color: var(--text);
            cursor: pointer;
            transition: var(--transition);
        }

        .navbar-toggler-custom:hover {
            background: var(--primary-light);
            border-color: var(--primary);
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            background: linear-gradient(135deg, #f0f4ff 0%, #fafbff 35%, #f7f9fc 100%);
            padding: var(--spacing-xl) 0 var(--spacing-lg);
            overflow: hidden;
            border-bottom: 1px solid var(--border-light);
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: url('/assets/images/backpic/back-1.jpg');
            background-size: cover;
            background-position: center;
            opacity: 0.07;
            z-index: 0;
            pointer-events: none;
        }

        .hero-section .container {
            position: relative;
            z-index: 1;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.1fr 1fr;
            gap: var(--spacing-lg);
            align-items: stretch;
        }

        .hero-content {
            display: flex;
            flex-direction: column;
            justify-content: center;
            padding: var(--spacing-md) 0;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 50px;
            padding: 8px 18px;
            font-size: 13px;
            font-weight: 500;
            color: var(--primary);
            margin-bottom: var(--spacing-md);
            align-self: flex-start;
            box-shadow: var(--shadow-sm);
        }

        .hero-badge i {
            color: var(--accent);
        }

        .hero-title {
            font-size: clamp(28px, 4vw, 42px);
            font-weight: 700;
            letter-spacing: -0.02em;
            line-height: 1.25;
            color: var(--text);
            margin-bottom: var(--spacing-sm);
        }

        .hero-title .highlight {
            color: var(--primary);
            position: relative;
        }

        .hero-title .highlight-accent {
            color: var(--accent);
        }

        .hero-desc {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.85;
            margin-bottom: var(--spacing-md);
            max-width: 560px;
        }

        .hero-cta-row {
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-sm);
            margin-bottom: var(--spacing-md);
        }

        .btn-hero-primary {
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 50px;
            padding: 14px 32px;
            font-weight: 600;
            font-size: 15px;
            transition: var(--transition);
            box-shadow: 0 6px 20px rgba(30, 94, 255, 0.3);
        }

        .btn-hero-primary:hover,
        .btn-hero-primary:focus {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 10px 32px rgba(13, 43, 107, 0.35);
        }

        .btn-hero-secondary {
            background: #fff;
            color: var(--text);
            border: 1.5px solid var(--border);
            border-radius: 50px;
            padding: 14px 28px;
            font-weight: 500;
            font-size: 15px;
            transition: var(--transition);
        }

        .btn-hero-secondary:hover,
        .btn-hero-secondary:focus {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
        }

        .hero-data-row {
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-md);
            margin-top: var(--spacing-xs);
        }

        .hero-data-item {
            display: flex;
            flex-direction: column;
        }

        .hero-data-item .data-num {
            font-size: 22px;
            font-weight: 700;
            color: var(--primary-dark);
            letter-spacing: -0.01em;
        }

        .hero-data-item .data-label {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 2px;
        }

        /* Hero Compare Cards */
        .hero-compare {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0;
            align-items: stretch;
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            overflow: hidden;
            border: 1px solid var(--border-light);
        }

        .hero-compare-card {
            padding: var(--spacing-md);
            display: flex;
            flex-direction: column;
        }

        .hero-compare-card.recommended {
            background: linear-gradient(165deg, #0d2b6b 0%, #1e5eff 100%);
            color: #fff;
            position: relative;
            z-index: 1;
            border-radius: var(--radius-lg) 0 0 var(--radius-lg);
        }

        .hero-compare-card.standard {
            background: #fff;
            color: var(--text);
        }

        .compare-card-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: var(--spacing-sm);
        }

        .compare-card-badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.2);
            border-radius: 50px;
            padding: 4px 12px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.02em;
        }

        .hero-compare-card.standard .compare-card-badge {
            background: var(--primary-light);
            color: var(--primary);
        }

        .compare-card-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 4px;
            letter-spacing: -0.01em;
        }

        .compare-card-price {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: var(--spacing-xs);
            letter-spacing: -0.02em;
        }

        .compare-card-price .price-unit {
            font-size: 14px;
            font-weight: 400;
            opacity: 0.8;
        }

        .compare-card-desc {
            font-size: 13px;
            line-height: 1.7;
            opacity: 0.9;
            margin-bottom: var(--spacing-sm);
        }

        .compare-card-features {
            list-style: none;
            padding: 0;
            margin: 0 0 var(--spacing-sm) 0;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .compare-card-features li {
            font-size: 13px;
            display: flex;
            align-items: center;
            gap: 8px;
            line-height: 1.5;
            opacity: 0.95;
        }

        .compare-card-features li i {
            color: #4ade80;
            font-size: 12px;
        }

        .hero-compare-card.standard .compare-card-features li i {
            color: var(--primary);
        }

        .btn-compare-card {
            margin-top: auto;
            background: rgba(255, 255, 255, 0.18);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.35);
            border-radius: 50px;
            padding: 10px 20px;
            font-size: 13px;
            font-weight: 600;
            transition: var(--transition);
            text-align: center;
        }

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

        .hero-compare-card.standard .btn-compare-card {
            background: var(--primary);
            color: #fff;
            border: none;
        }

        .hero-compare-card.standard .btn-compare-card:hover {
            background: var(--primary-dark);
        }

        /* ===== Section Common ===== */
        .section-block {
            padding: var(--spacing-xl) 0;
            position: relative;
        }

        .section-block.alt-bg {
            background: #fff;
        }

        .section-header {
            margin-bottom: var(--spacing-lg);
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 0.04em;
            margin-bottom: var(--spacing-xs);
        }

        .section-title {
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--text);
            margin-bottom: var(--spacing-sm);
            line-height: 1.3;
        }

        .section-desc {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 720px;
            line-height: 1.85;
        }

        /* ===== Selling Points ===== */
        .selling-points-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
        }

        .selling-point-card {
            background: #fff;
            border-radius: var(--radius-md);
            padding: var(--spacing-lg) var(--spacing-md);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .selling-point-card::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: var(--transition);
        }

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

        .selling-point-card:hover::after {
            opacity: 1;
        }

        .sp-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: var(--spacing-sm);
            transition: var(--transition);
        }

        .selling-point-card:hover .sp-icon {
            background: var(--primary);
            color: #fff;
        }

        .sp-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
            letter-spacing: -0.01em;
        }

        .sp-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin: 0;
        }

        /* ===== Compare Table ===== */
        .compare-table-wrapper {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-light);
            overflow: hidden;
        }

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

        .compare-table thead th {
            background: var(--bg);
            padding: 18px 16px;
            text-align: left;
            font-weight: 600;
            color: var(--text);
            border-bottom: 1px solid var(--border);
            font-size: 14px;
        }

        .compare-table tbody td {
            padding: 16px 16px;
            border-bottom: 1px solid var(--border-light);
            color: var(--text-secondary);
            vertical-align: middle;
        }

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

        .compare-table tbody tr:hover td {
            background: #fafbff;
        }

        .compare-table .ct-highlight {
            background: #f0f4ff;
            font-weight: 600;
            color: var(--text);
        }

        .compare-table .ct-highlight:hover td {
            background: #e8eeff;
        }

        .compare-table .check-icon {
            color: #16a34a;
        }
        .compare-table .check-icon-alt {
            color: var(--primary);
        }
        .compare-table .x-icon {
            color: #dc2626;
        }

        /* ===== Recommended Tier ===== */
        .recommended-tier-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: var(--spacing-md);
        }

        .recommended-tier-main {
            background: linear-gradient(140deg, #0d2b6b 0%, #1e5eff 100%);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            color: #fff;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .recommended-tier-main::after {
            content: '';
            position: absolute;
            top: -40%;
            right: -20%;
            width: 300px;
            height: 300px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 50%;
            pointer-events: none;
        }

        .recommended-tier-main .tier-badge {
            display: inline-block;
            background: var(--accent);
            color: #fff;
            border-radius: 50px;
            padding: 6px 16px;
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 0.03em;
            margin-bottom: var(--spacing-sm);
        }

        .recommended-tier-main .tier-title {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: var(--spacing-xs);
            letter-spacing: -0.01em;
        }

        .recommended-tier-main .tier-desc {
            font-size: 14px;
            opacity: 0.9;
            line-height: 1.75;
            margin-bottom: var(--spacing-sm);
        }

        .recommended-tier-main .tier-price {
            font-size: 36px;
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: var(--spacing-sm);
        }

        .recommended-tier-main .tier-price span {
            font-size: 15px;
            font-weight: 400;
            opacity: 0.8;
        }

        .tier-perks {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .tier-perks li {
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 50px;
            padding: 6px 14px;
            font-size: 12px;
            font-weight: 500;
        }

        .recommended-tier-side {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: var(--spacing-md);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .recommended-tier-side img {
            border-radius: var(--radius-md);
            margin-bottom: var(--spacing-sm);
            width: 100%;
            height: 200px;
            object-fit: cover;
        }

        .recommended-tier-side .side-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 6px;
        }

        .recommended-tier-side .side-desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== Scene Demo ===== */
        .scene-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--spacing-md);
        }

        .scene-card {
            background: #fff;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            position: relative;
        }

        .scene-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .scene-card img {
            width: 100%;
            height: 260px;
            object-fit: cover;
            transition: var(--transition);
        }

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

        .scene-card-body {
            padding: var(--spacing-md);
        }

        .scene-card-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 50px;
            padding: 4px 12px;
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .scene-card-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 6px;
        }

        .scene-card-desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        /* ===== News / Info Section ===== */
        .news-layout {
            display: grid;
            grid-template-columns: 1.3fr 0.7fr;
            gap: var(--spacing-md);
        }

        .news-list-panel {
            background: #fff;
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
        }

        .news-list-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: var(--spacing-sm);
            display: flex;
            align-items: center;
            gap: 8px;
        }

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

        .news-list-items li {
            padding: 12px 0;
            border-bottom: 1px solid var(--border-light);
        }

        .news-list-items li:last-child {
            border-bottom: none;
        }

        .news-list-items a {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            color: var(--text);
            font-size: 14px;
            font-weight: 500;
            line-height: 1.6;
            transition: var(--transition);
        }

        .news-list-items a:hover {
            color: var(--primary);
        }

        .news-list-items a .news-date {
            font-size: 12px;
            color: var(--text-muted);
            min-width: 72px;
            padding-top: 2px;
        }

        .news-recommend-panel {
            background: #fff;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
        }

        .news-recommend-panel img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }

        .news-recommend-body {
            padding: var(--spacing-md);
        }

        .news-recommend-body .rec-tag {
            display: inline-block;
            background: var(--accent-light);
            color: #8b6914;
            border-radius: 50px;
            padding: 4px 12px;
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .news-recommend-body .rec-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 6px;
        }

        .news-recommend-body .rec-desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        /* ===== Social Proof ===== */
        .social-proof-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
        }

        .testimonial-card {
            background: #fff;
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .testimonial-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .testimonial-header {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: var(--spacing-sm);
        }

        .testimonial-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 16px;
        }

        .testimonial-name {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
        }

        .testimonial-tag {
            font-size: 12px;
            color: var(--text-muted);
        }

        .testimonial-text {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin: 0;
            margin-bottom: var(--spacing-xs);
        }

        .testimonial-rating {
            color: #f59e0b;
            font-size: 13px;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: linear-gradient(135deg, #0d2b6b 0%, #1e5eff 60%, #3b82f6 100%);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg) var(--spacing-md);
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -20%;
            width: 400px;
            height: 400px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40%;
            right: -10%;
            width: 300px;
            height: 300px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-section .container {
            position: relative;
            z-index: 1;
        }

        .cta-title {
            font-size: clamp(22px, 3vw, 30px);
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: var(--spacing-sm);
        }

        .cta-desc {
            font-size: 15px;
            opacity: 0.92;
            max-width: 600px;
            margin: 0 auto var(--spacing-md);
            line-height: 1.8;
        }

        .btn-cta-light {
            background: #fff;
            color: var(--primary-dark);
            border: none;
            border-radius: 50px;
            padding: 14px 36px;
            font-weight: 700;
            font-size: 15px;
            transition: var(--transition);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
        }

        .btn-cta-light:hover {
            transform: translateY(-3px);
            box-shadow: 0 14px 36px rgba(0, 0, 0, 0.3);
            color: var(--primary);
        }

        /* ===== FAQ ===== */
        .faq-list .accordion-item {
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md) !important;
            margin-bottom: var(--spacing-sm);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }

        .faq-list .accordion-button {
            background: #fff;
            color: var(--text);
            font-weight: 600;
            font-size: 15px;
            padding: 16px 20px;
            border-radius: var(--radius-md) !important;
            transition: var(--transition);
        }

        .faq-list .accordion-button:not(.collapsed) {
            background: var(--primary-light);
            color: var(--primary-dark);
            box-shadow: none;
        }

        .faq-list .accordion-button:focus {
            box-shadow: 0 0 0 4px rgba(30, 94, 255, 0.15);
        }

        .faq-list .accordion-body {
            background: #fff;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            padding: 16px 20px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0d1b3e;
            color: #b8c4dd;
            padding: var(--spacing-xl) 0 var(--spacing-md);
            font-size: 14px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: var(--spacing-lg);
            margin-bottom: var(--spacing-lg);
        }

        .footer-brand {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: var(--spacing-sm);
            line-height: 1.4;
        }

        .footer-brand .footer-logo-accent {
            color: #7ba3ff;
        }

        .footer-desc {
            font-size: 13px;
            color: #92a0c0;
            line-height: 1.8;
            max-width: 360px;
        }

        .footer-col-title {
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            margin-bottom: var(--spacing-sm);
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-links a {
            color: #92a0c0;
            font-size: 13px;
            transition: var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: var(--spacing-md);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: var(--spacing-sm);
        }

        .footer-copy {
            font-size: 12px;
            color: #6b7a99;
        }

        .footer-copy a {
            color: #7ba3ff;
        }

        /* ===== Floating CTA Bar ===== */
        .floating-cta-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: rgba(13, 27, 62, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            color: #fff;
            padding: 12px 0;
            z-index: 1040;
            transform: translateY(100%);
            transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            border-top: 1px solid rgba(255, 255, 255, 0.15);
        }

        .floating-cta-bar.visible {
            transform: translateY(0);
        }

        .floating-cta-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-sm);
            flex-wrap: wrap;
        }

        .floating-cta-text {
            font-size: 14px;
            font-weight: 500;
            color: #dbe5f5;
        }

        .floating-cta-text strong {
            color: #fff;
        }

        .btn-floating {
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 50px;
            padding: 10px 24px;
            font-weight: 600;
            font-size: 14px;
            transition: var(--transition);
            white-space: nowrap;
        }

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

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            :root {
                --spacing-xl: 48px;
                --spacing-xxl: 64px;
            }
            .hero-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }
            .recommended-tier-grid {
                grid-template-columns: 1fr;
            }
            .news-layout {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                flex-wrap: wrap;
                gap: var(--spacing-xs);
            }
            .brand-logo {
                max-width: 180px;
                font-size: 13px;
            }
            .nav-search-wrapper {
                order: 3;
                flex: 1 1 100%;
                max-width: 100%;
                min-width: auto;
            }
            .main-nav {
                gap: 4px;
            }
            .main-nav .nav-link-item {
                padding: 8px 12px;
                font-size: 13px;
            }
            .navbar-toggler-custom {
                display: block;
            }
            .hero-compare {
                grid-template-columns: 1fr;
                border-radius: var(--radius-md);
            }
            .hero-compare-card.recommended {
                border-radius: var(--radius-md) var(--radius-md) 0 0;
            }
            .selling-points-grid {
                grid-template-columns: 1fr;
            }
            .scene-grid {
                grid-template-columns: 1fr;
            }
            .social-proof-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }
            .floating-cta-inner {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            :root {
                --spacing-xl: 32px;
                --spacing-lg: 24px;
                --spacing-md: 16px;
                --spacing-sm: 12px;
            }
            .brand-logo {
                max-width: 140px;
                font-size: 12px;
            }
            .main-nav .nav-link-item {
                padding: 6px 10px;
                font-size: 12px;
            }
            .hero-title {
                font-size: 24px;
            }
            .hero-desc {
                font-size: 14px;
            }
            .btn-hero-primary,
            .btn-hero-secondary {
                padding: 12px 24px;
                font-size: 14px;
                width: 100%;
                text-align: center;
            }
            .hero-cta-row {
                flex-direction: column;
            }
            .hero-data-row {
                gap: var(--spacing-sm);
            }
            .compare-table {
                font-size: 12px;
            }
            .compare-table thead th,
            .compare-table tbody td {
                padding: 10px 8px;
            }
            .section-title {
                font-size: 22px;
            }
            .cta-title {
                font-size: 20px;
            }
            .btn-cta-light {
                padding: 12px 28px;
                font-size: 14px;
            }
        }

        /* Extra utility classes */
        .text-accent {
            color: var(--accent);
        }
        .bg-primary-light {
            background: var(--primary-light);
        }
        .fw-bold {
            font-weight: 700;
        }
        .mb-0 {
            margin-bottom: 0;
        }
        .mt-auto {
            margin-top: auto;
        }
        .gap-2 {
            gap: 8px;
        }
        .d-flex {
            display: flex;
        }
        .align-items-center {
            align-items: center;
        }
        .justify-content-between {
            justify-content: space-between;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}