/* roulang page: index */
:root {
            --primary: #1A56DB;
            --primary-hover: #1442a6;
            --accent: #0D9488;
            --accent-orange: #F97316;
            --bg-light: #F8FAFC;
            --bg-white: #FFFFFF;
            --bg-dark: #0F172A;
            --text-dark: #0F172A;
            --text-regular: #334155;
            --text-muted: #64748B;
            --border-color: #E2E8F0;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-full: 9999px;
            --shadow-sm: 0 1px 3px 0 rgba(15, 23, 42, 0.05), 0 1px 2px -1px rgba(15, 23, 42, 0.05);
            --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
            --shadow-hover: 0 12px 24px -6px rgba(26, 86, 219, 0.12), 0 8px 16px -6px rgba(26, 86, 219, 0.08);
            --transition: all 0.25s ease-in-out;
        }

        * { box-sizing: border-box; margin: 0; padding: 0; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-light);
            color: var(--text-regular);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

        a { color: inherit; text-decoration: none; transition: var(--transition); }
        a:hover, a:focus { color: var(--primary); }
        img { max-width: 100%; height: auto; display: block; }

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

        /* 顶部双行分段标签导航 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
        }
        .header-topbar {
            background: #F1F5F9;
            font-size: 13px;
            color: var(--text-muted);
            padding: 6px 0;
            border-bottom: 1px solid #E2E8F0;
        }
        .header-topbar .flex-bar {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .header-nav {
            padding: 14px 0;
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .site-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
        }
        .site-brand i { font-size: 26px; }

        /* 分段标签导航条 */
        .nav-segmented {
            display: flex;
            background: #EDF2F7;
            padding: 4px;
            border-radius: var(--radius-full);
            gap: 2px;
        }
        .nav-segment-item {
            padding: 8px 18px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-muted);
            border-radius: var(--radius-full);
            transition: var(--transition);
        }
        .nav-segment-item:hover {
            color: var(--primary);
        }
        .nav-segment-item.active {
            background: #FFFFFF;
            color: var(--primary);
            box-shadow: 0 2px 4px rgba(0,0,0,0.06);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #FFFFFF !important;
            padding: 10px 22px;
            font-size: 14px;
            font-weight: 600;
            border-radius: var(--radius-full);
            box-shadow: 0 4px 10px rgba(26, 86, 219, 0.25);
            transition: var(--transition);
        }
        .btn-primary:hover {
            background: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 14px rgba(26, 86, 219, 0.35);
        }

        /* 统一Section样式 */
        .page-section {
            padding: 80px 0;
            position: relative;
        }
        .section-light {
            background: var(--bg-white);
            border-top: 1px solid #F1F5F9;
            border-bottom: 1px solid #F1F5F9;
        }
        .section-gray {
            background: var(--bg-light);
        }
        .section-dark {
            background: var(--bg-dark);
            color: #FFFFFF;
        }

        .section-header {
            margin-bottom: 48px;
        }
        .section-header.text-center {
            text-align: center;
        }
        .section-badge {
            display: inline-block;
            background: rgba(26, 86, 219, 0.1);
            color: var(--primary);
            font-size: 12px;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: var(--radius-full);
            margin-bottom: 12px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .section-dark .section-badge {
            background: rgba(13, 148, 136, 0.2);
            color: var(--accent);
        }
        .section-title {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-dark);
            margin-bottom: 14px;
            line-height: 1.3;
        }
        .section-dark .section-title {
            color: #FFFFFF;
        }
        .section-desc {
            font-size: 16px;
            color: var(--text-muted);
            max-width: 680px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .section-dark .section-desc {
            color: #94A3B8;
        }

        /* 板块1：Hero 预告封面与倒计时 */
        .hero-banner {
            padding: 80px 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.88), rgba(26, 86, 219, 0.8)), url('/assets/images/af959b07e43fd172.webp') center/cover no-repeat;
            color: #FFFFFF;
        }
        .hero-content {
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .hero-live-pill {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(249, 115, 22, 0.2);
            border: 1px solid var(--accent-orange);
            color: #FFEDD5;
            padding: 6px 14px;
            border-radius: var(--radius-full);
            font-size: 13px;
            font-weight: 600;
            width: fit-content;
            margin-bottom: 20px;
        }
        .hero-live-dot {
            width: 8px;
            height: 8px;
            background: var(--accent-orange);
            border-radius: 50%;
            animation: pulse-dot 1.5s infinite;
        }
        @keyframes pulse-dot {
            0% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.4; transform: scale(1.3); }
            100% { opacity: 1; transform: scale(1); }
        }
        .hero-title {
            font-size: 44px;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 20px;
            color: #FFFFFF;
        }
        .hero-intro {
            font-size: 16px;
            color: #CBD5E1;
            margin-bottom: 30px;
            max-width: 580px;
            line-height: 1.75;
        }
        .hero-card-countdown {
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: var(--radius-md);
            padding: 30px;
            color: #FFFFFF;
        }
        .countdown-timer {
            display: flex;
            gap: 16px;
            margin: 20px 0 28px 0;
        }
        .timer-unit {
            flex: 1;
            background: rgba(15, 23, 42, 0.6);
            border-radius: var(--radius-sm);
            padding: 12px 6px;
            text-align: center;
        }
        .timer-num {
            font-size: 28px;
            font-weight: 800;
            color: #38BDF8;
            font-family: monospace;
        }
        .timer-label {
            font-size: 12px;
            color: #94A3B8;
        }

        /* 通用卡片 */
        .feature-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            padding: 28px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(26, 86, 219, 0.3);
        }
        .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 10px;
            background: rgba(26, 86, 219, 0.08);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 20px;
        }

        /* 板块2：痛点与方案对比 */
        .pain-solve-box {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
        }
        .pain-col {
            background: #FEF2F2;
            padding: 36px;
            border-right: 1px solid #FEE2E2;
        }
        .solve-col {
            background: #F0FDF4;
            padding: 36px;
        }

        /* 板块4：主打端侧 */
        .terminal-card {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .terminal-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .terminal-badge {
            display: inline-block;
            font-size: 12px;
            background: #F1F5F9;
            color: var(--text-muted);
            padding: 4px 10px;
            border-radius: 4px;
            margin-bottom: 16px;
        }

        /* 板块5：横向步骤流 */
        .step-timeline {
            display: flex;
            justify-content: space-between;
            position: relative;
            margin-top: 20px;
        }
        .step-timeline::before {
            content: '';
            position: absolute;
            top: 28px;
            left: 5%;
            right: 5%;
            height: 2px;
            background: #E2E8F0;
            z-index: 1;
        }
        .step-item {
            position: relative;
            z-index: 2;
            text-align: center;
            flex: 1;
            padding: 0 10px;
        }
        .step-circle {
            width: 56px;
            height: 56px;
            background: var(--bg-white);
            border: 3px solid var(--primary);
            border-radius: 50%;
            color: var(--primary);
            font-size: 20px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px auto;
            box-shadow: 0 0 0 6px var(--bg-light);
        }

        /* 板块6：深色架构区 */
        .arch-grid-box {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-md);
            padding: 30px;
        }
        .arch-spec-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            margin-bottom: 24px;
        }
        .arch-spec-item i {
            color: var(--accent);
            font-size: 22px;
            margin-top: 3px;
        }

        /* 板块8：数据统计条 */
        .stat-block {
            text-align: center;
            padding: 24px;
            background: #FFFFFF;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
        }
        .stat-number {
            font-size: 42px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1;
            margin-bottom: 8px;
            font-family: monospace;
        }

        /* 板块9：用户证言 */
        .testimonial-card {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            padding: 28px;
            height: 100%;
        }
        .user-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 20px;
        }
        .user-avatar-mock {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: #E2E8F0;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-weight: bold;
        }

        /* 板块10：资讯卡片 */
        .news-card {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .news-cover {
            height: 180px;
            overflow: hidden;
        }
        .news-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .news-card:hover .news-cover img {
            transform: scale(1.05);
        }
        .news-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        /* 板块11：手风琴 FAQ */
        .faq-accordion {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
        }
        .accordion-item {
            border-bottom: 1px solid var(--border-color);
        }
        .accordion-item:last-child {
            border-bottom: none;
        }
        .accordion-title {
            padding: 20px 24px;
            font-weight: 700;
            color: var(--text-dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: var(--transition);
        }
        .accordion-title:hover {
            background: #F8FAFC;
            color: var(--primary);
        }
        .accordion-content {
            padding: 0 24px 20px 24px;
            color: var(--text-regular);
            display: none;
            line-height: 1.7;
        }
        .accordion-item.active .accordion-content {
            display: block;
        }
        .accordion-item.active .accordion-title {
            color: var(--primary);
        }
        .accordion-item.active .accordion-title i {
            transform: rotate(180deg);
        }

        /* 板块12：底部门户 CTA */
        .cta-box {
            background: linear-gradient(135deg, #1E40AF 0%, #1A56DB 100%);
            border-radius: 16px;
            padding: 60px 40px;
            color: #FFFFFF;
            box-shadow: 0 20px 25px -5px rgba(26, 86, 219, 0.3);
        }

        /* 页脚 */
        .site-footer {
            background: #0B1120;
            color: #94A3B8;
            padding: 70px 0 30px 0;
            font-size: 14px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-title {
            color: #FFFFFF;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 20px;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a:hover {
            color: #FFFFFF;
        }
        .footer-bottom {
            margin-top: 50px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            text-align: center;
            font-size: 13px;
        }

        /* 响应式调整 */
        @media screen and (max-width: 1024px) {
            .nav-segmented { display: none; }
            .hero-title { font-size: 34px; }
            .step-timeline { flex-direction: column; gap: 30px; }
            .step-timeline::before { display: none; }
        }
        @media screen and (max-width: 640px) {
            .page-section { padding: 50px 0; }
            .hero-title { font-size: 28px; }
            .countdown-timer { gap: 8px; }
            .timer-num { font-size: 20px; }
            .cta-box { padding: 36px 20px; }
        }