/* roulang page: index */
:root {
            --primary: #0F3B5E;
            --primary-light: #1E5A7A;
            --accent-gold: #C9A84C;
            --accent-gold-light: #DFC278;
            --bg: #F7F9FC;
            --card-bg: #FFFFFF;
            --text-dark: #1A1A1A;
            --text-mid: #4A5568;
            --text-light: #718096;
            --border-light: #E2E8F0;
            --success: #2F855A;
            --danger: #C53030;
            --shadow-sm: 0 2px 12px rgba(15, 59, 94, 0.05);
            --shadow-card: 0 4px 20px rgba(15, 59, 94, 0.06);
            --shadow-hover: 0 8px 30px rgba(15, 59, 94, 0.12);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --font-zh: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
            --font-en: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
            --section-gap: 100px;
        }

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

        body {
            font-family: var(--font-zh);
            background: var(--bg);
            color: var(--text-dark);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        /* 导航系统 */
        .nav-top {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 70px;
            background: #fff;
            border-bottom: 1px solid var(--border-light);
            z-index: 1000;
            box-shadow: var(--shadow-sm);
            transition: all 0.25s ease;
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .nav-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            font-weight: 700;
            font-size: 1.4rem;
            color: var(--primary);
            letter-spacing: -0.3px;
            text-decoration: none;
            white-space: nowrap;
        }

        .nav-brand i {
            font-size: 1.8rem;
            color: var(--accent-gold);
        }

        .nav-brand span {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-channels {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
        }

        .nav-channels a {
            text-decoration: none;
            color: var(--text-mid);
            font-weight: 500;
            font-size: 0.95rem;
            padding-bottom: 6px;
            border-bottom: 3px solid transparent;
            transition: all 0.2s;
        }

        .nav-channels a:hover,
        .nav-channels a.active {
            color: var(--primary);
            border-bottom-color: var(--primary);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn-search {
            background: none;
            border: none;
            font-size: 1.2rem;
            color: var(--text-mid);
            cursor: pointer;
            padding: 8px;
            transition: color 0.2s;
        }

        .btn-search:hover {
            color: var(--primary);
        }

        .btn-ghost {
            background: transparent;
            border: 1.5px solid var(--primary);
            color: var(--primary);
            padding: 8px 20px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all 0.2s;
            text-decoration: none;
        }

        .btn-ghost:hover {
            background: rgba(15, 59, 94, 0.04);
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            color: #fff;
            border: none;
            padding: 10px 24px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: all 0.25s;
            box-shadow: 0 4px 12px rgba(15, 59, 94, 0.25);
            text-decoration: none;
            white-space: nowrap;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(15, 59, 94, 0.35);
            filter: brightness(1.05);
            color: #fff;
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            color: var(--primary);
            cursor: pointer;
            padding: 8px;
        }

        /* Hero */
        .hero-section {
            padding-top: 150px;
            padding-bottom: 80px;
            background: var(--bg);
        }

        .hero-grid {
            display: flex;
            align-items: center;
            gap: 60px;
        }

        .hero-left {
            flex: 1.1;
        }

        .hero-left h1 {
            font-size: 2.85rem;
            font-weight: 700;
            line-height: 1.2;
            color: var(--primary);
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }

        .hero-left h1 .gold {
            color: var(--accent-gold);
        }

        .hero-sub {
            font-size: 1.15rem;
            color: var(--text-mid);
            margin-bottom: 32px;
            max-width: 520px;
        }

        .hero-cta-group {
            display: flex;
            gap: 16px;
            margin-bottom: 40px;
        }

        .btn-outline {
            background: transparent;
            border: 1.5px solid var(--primary);
            color: var(--primary);
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            cursor: pointer;
            transition: 0.2s;
            text-decoration: none;
        }

        .btn-outline:hover {
            background: rgba(15, 59, 94, 0.05);
        }

        .hero-stats {
            display: flex;
            gap: 40px;
        }

        .stat-item .stat-num {
            font-family: var(--font-en);
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.1;
        }

        .stat-label {
            font-size: 0.9rem;
            color: var(--text-light);
        }

        .hero-right {
            flex: 0.9;
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: 0 20px 40px rgba(15, 59, 94, 0.18);
            background: #0A2540;
        }

        .hero-img {
            width: 100%;
            height: 380px;
            object-fit: cover;
            display: block;
            opacity: 0.85;
        }

        .hero-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 50%;
            background: linear-gradient(to top, rgba(15, 59, 94, 0.85), transparent);
            display: flex;
            align-items: flex-end;
            padding: 28px;
        }

        .overlay-text {
            color: #fff;
            font-weight: 600;
            font-size: 1.2rem;
            text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
        }

        /* 亮点网格 */
        .section {
            padding: var(--section-gap) 0;
        }

        .section-title {
            text-align: center;
            margin-bottom: 60px;
            font-size: 2rem;
            font-weight: 600;
            color: var(--primary);
        }

        .features-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            grid-template-rows: auto auto;
            gap: 28px;
        }

        .feat-card {
            background: var(--card-bg);
            border-radius: var(--radius-md);
            padding: 32px;
            box-shadow: var(--shadow-card);
            position: relative;
            overflow: hidden;
            transition: all 0.25s;
            border-left: 4px solid transparent;
        }

        .feat-card.wide {
            grid-column: span 1;
        }

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

        .feat-icon {
            font-size: 2.4rem;
            color: var(--accent-gold);
            margin-bottom: 18px;
        }

        .feat-card h3 {
            font-size: 1.4rem;
            font-weight: 600;
            margin-bottom: 12px;
        }

        .feat-desc {
            color: var(--text-mid);
            font-size: 0.95rem;
            margin-bottom: 14px;
            line-height: 1.5;
        }

        .feat-link {
            color: var(--primary);
            font-weight: 600;
            font-size: 0.9rem;
            text-decoration: none;
        }

        .feat-link i {
            margin-left: 4px;
        }

        /* 案例瀑布 */
        .cases-waterfall {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            align-items: start;
        }

        .case-card {
            background: #fff;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: 0.25s;
        }

        .case-card:hover {
            transform: scale(1.02);
            box-shadow: var(--shadow-hover);
        }

        .case-img-wrap {
            position: relative;
            overflow: hidden;
            height: 220px;
        }

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

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

        .case-gradient {
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 60%;
            background: linear-gradient(to top, rgba(0, 0, 0, 0.65), transparent);
            pointer-events: none;
        }

        .case-info {
            padding: 20px;
        }

        .case-tag {
            display: inline-block;
            background: #FEF3E0;
            color: #8B6914;
            font-weight: 600;
            font-size: 0.75rem;
            padding: 4px 12px;
            border-radius: 20px;
            margin-bottom: 10px;
        }

        .case-title {
            font-weight: 600;
            font-size: 1.1rem;
            margin-bottom: 8px;
            color: var(--text-dark);
        }

        /* 对比 */
        .compare-table {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0;
            background: #fff;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }

        .compare-col {
            padding: 32px;
        }

        .compare-col.recommend {
            background: #F0F6FB;
            border-right: 2px solid var(--accent-gold);
            position: relative;
        }

        .badge-recommend {
            display: inline-block;
            background: var(--accent-gold);
            color: #fff;
            font-weight: 700;
            font-size: 0.8rem;
            padding: 6px 16px;
            border-radius: 20px;
            margin-bottom: 16px;
        }

        .compare-col h3 {
            font-weight: 700;
            font-size: 1.5rem;
            margin-bottom: 24px;
        }

        .compare-row {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 14px 0;
            border-bottom: 1px solid var(--border-light);
            font-size: 0.95rem;
        }

        .icon-check {
            color: var(--success);
            font-size: 1.2rem;
        }

        .icon-cross {
            color: var(--danger);
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: #fff;
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            box-shadow: var(--shadow-sm);
            border-left: 4px solid transparent;
            transition: 0.2s;
        }

        .faq-item.active {
            border-left-color: var(--primary);
        }

        .faq-question {
            padding: 20px 24px;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: #fff;
            border: none;
            width: 100%;
            text-align: left;
            font-size: 1rem;
        }

        .faq-answer {
            padding: 0 24px 20px;
            display: none;
            color: var(--text-mid);
        }

        .faq-item.active .faq-answer {
            display: block;
        }

        /* 联系 */
        .contact-form-wrap {
            max-width: 600px;
            margin: 0 auto 40px;
            display: flex;
            gap: 12px;
        }

        .contact-input {
            flex: 1;
            padding: 14px 20px;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            font-size: 1rem;
            transition: 0.2s;
        }

        .contact-input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(15, 59, 94, 0.08);
        }

        .contact-cards {
            display: flex;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
            text-align: center;
            color: var(--text-mid);
        }

        /* 页脚 */
        .footer {
            background: #0A2540;
            color: #CBD5E0;
            padding: 60px 0 20px;
            margin-top: 80px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .footer-logo {
            font-weight: 700;
            font-size: 1.3rem;
            color: #fff;
            margin-bottom: 8px;
        }

        .footer-slogan {
            color: var(--accent-gold);
            font-size: 0.9rem;
        }

        .footer h4 {
            color: #fff;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .footer a {
            color: #CBD5E0;
            text-decoration: none;
            display: block;
            margin-bottom: 8px;
            font-size: 0.9rem;
            transition: color 0.2s;
        }

        .footer a:hover {
            color: var(--accent-gold);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            text-align: center;
            font-size: 0.85rem;
        }

        @media (max-width: 1024px) {
            .hero-grid {
                flex-direction: column;
                gap: 40px;
            }
            .hero-right {
                width: 100%;
            }
            .features-grid {
                grid-template-columns: 1fr 1fr;
            }
            .cases-waterfall {
                grid-template-columns: 1fr 1fr;
            }
            .compare-table {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .nav-channels {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
        }

        @media (max-width: 640px) {
            .hero-left h1 {
                font-size: 2rem;
            }
            .hero-stats {
                flex-wrap: wrap;
                gap: 24px;
            }
            .hero-cta-group {
                flex-direction: column;
                align-items: flex-start;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .cases-waterfall {
                grid-template-columns: 1fr;
            }
            .contact-form-wrap {
                flex-direction: column;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .section {
                padding: 60px 0;
            }
        }

        .nav-mobile-panel {
            display: none;
        }