/* roulang page: index */
:root {
            --primary: #1A56DB;
            --primary-hover: #1545B0;
            --accent: #0284C7;
            --accent-green: #10B981;
            --bg-page: #F8FAFC;
            --bg-card: #FFFFFF;
            --dark-navy: #0F172A;
            --text-heading: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border-light: #E2E8F0;
            --shadow-subtle: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
            --shadow-hover: 0 20px 25px -5px rgba(15, 23, 42, 0.08);
            --transition-smooth: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
            --radius-default: 14px;
        }

        /* 基础样式重置 */
        *, *::before, *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-page);
            color: var(--text-body);
            line-height: 1.75;
            letter-spacing: -0.01em;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            color: var(--text-heading);
            font-weight: 700;
            line-height: 1.3;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition-smooth);
        }

        /* 极简高端双行文字导航 */
        .site-topbar {
            background-color: #FFFFFF;
            border-bottom: 1px solid var(--border-light);
            font-size: 12px;
            color: var(--text-muted);
            padding: 7px 0;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1020;
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.8);
            height: 72px;
            display: flex;
            align-items: center;
        }
        .navbar-brand {
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .navbar-brand i {
            font-size: 1.4rem;
            color: var(--primary);
        }
        .nav-link {
            font-size: 14px;
            font-weight: 500;
            color: #334155 !important;
            padding: 8px 14px !important;
            position: relative;
            transition: var(--transition-smooth);
        }
        .nav-link:hover, .nav-link.active {
            color: var(--primary) !important;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0px;
            left: 50%;
            width: 0;
            height: 2px;
            background-color: var(--primary);
            transition: var(--transition-smooth);
            transform: translateX(-50%);
            border-radius: 2px;
        }
        .nav-link:hover::after, .nav-link.active::after {
            width: 18px;
        }

        /* 按钮与交互徽章规范 */
        .btn-brand-primary {
            background-color: var(--primary);
            color: #FFFFFF;
            font-weight: 600;
            font-size: 14px;
            padding: 10px 22px;
            border-radius: 8px;
            border: 1px solid var(--primary);
            box-shadow: 0 4px 12px rgba(26, 86, 219, 0.2);
            transition: var(--transition-smooth);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            min-height: 44px;
        }
        .btn-brand-primary:hover {
            background-color: var(--primary-hover);
            color: #FFFFFF;
            transform: translateY(-2px);
            box-shadow: 0 8px 18px rgba(26, 86, 219, 0.28);
        }
        .btn-brand-outline {
            background-color: transparent;
            color: var(--primary);
            font-weight: 600;
            font-size: 14px;
            padding: 10px 22px;
            border-radius: 8px;
            border: 1px solid #CBD5E1;
            transition: var(--transition-smooth);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            min-height: 44px;
        }
        .btn-brand-outline:hover {
            border-color: var(--primary);
            background-color: rgba(26, 86, 219, 0.04);
            color: var(--primary);
            transform: translateY(-2px);
        }

        .badge-live-dot {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(16, 185, 129, 0.1);
            color: var(--accent-green);
            padding: 4px 10px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
        }
        .pulse-circle {
            width: 8px;
            height: 8px;
            background-color: var(--accent-green);
            border-radius: 50%;
            animation: pulse-ring 2s infinite ease-in-out;
        }
        @keyframes pulse-ring {
            0% { transform: scale(0.9); opacity: 1; }
            50% { transform: scale(1.4); opacity: 0.5; }
            100% { transform: scale(0.9); opacity: 1; }
        }

        /* 全局通用卡片 */
        .app-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-default);
            box-shadow: var(--shadow-subtle);
            transition: var(--transition-smooth);
            height: 100%;
        }
        .app-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: #CBD5E1;
        }

        /* 模块大留白规范 */
        .section-gap {
            padding-top: 96px;
            padding-bottom: 96px;
        }
        .section-gap-sm {
            padding-top: 64px;
            padding-bottom: 64px;
        }
        .section-header {
            margin-bottom: 56px;
        }
        .section-eyebrow {
            color: var(--primary);
            font-weight: 700;
            font-size: 13px;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            display: inline-block;
            margin-bottom: 10px;
        }

        /* 首屏 Hero 区块 */
        .hero-banner {
            position: relative;
            background: linear-gradient(135deg, rgba(248, 250, 252, 0.95) 0%, rgba(241, 245, 249, 0.92) 100%), url('/assets/images/5212c6f22decab81.jpg') center/cover no-repeat;
            padding: 90px 0 80px 0;
            border-bottom: 1px solid var(--border-light);
        }
        .hero-title {
            font-size: clamp(2rem, 3.8vw, 3.2rem);
            font-weight: 800;
            color: var(--dark-navy);
            margin-bottom: 24px;
            letter-spacing: -0.02em;
        }
        .hero-desc {
            font-size: 1.1rem;
            color: #475569;
            margin-bottom: 32px;
            max-width: 620px;
        }
        .hero-stat-card {
            background: #FFFFFF;
            border-radius: var(--radius-default);
            padding: 24px;
            box-shadow: 0 10px 30px rgba(15, 23, 42, 0.07);
            border: 1px solid rgba(226, 232, 240, 0.8);
        }

        /* 痛点对比区 */
        .pain-box {
            background: #FFF1F2;
            border-left: 4px solid #F43F5E;
            padding: 20px 24px;
            border-radius: 8px;
            margin-bottom: 16px;
        }
        .gain-box {
            background: #ECFDF5;
            border-left: 4px solid #10B981;
            padding: 20px 24px;
            border-radius: 8px;
            margin-bottom: 16px;
        }

        /* 深色理念区 (Dark Concept) */
        .dark-concept-section {
            background-color: var(--dark-navy);
            color: #F8FAFC;
            position: relative;
            overflow: hidden;
        }
        .dark-concept-section h2, .dark-concept-section h3 {
            color: #FFFFFF;
        }
        .dark-concept-section p {
            color: #94A3B8;
        }
        .dark-concept-card {
            background: rgba(30, 41, 59, 0.7);
            border: 1px solid rgba(51, 65, 85, 0.8);
            border-radius: var(--radius-default);
            padding: 28px;
            backdrop-filter: blur(8px);
            transition: var(--transition-smooth);
        }
        .dark-concept-card:hover {
            border-color: var(--accent);
            transform: translateY(-4px);
        }

        /* 统计数据横幅 */
        .metrics-strip {
            background-color: #F1F5F9;
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
            padding: 50px 0;
        }
        .metric-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.1;
            margin-bottom: 6px;
        }

        /* 流程步骤节点 */
        .workflow-step {
            position: relative;
            padding: 24px;
            background: #FFFFFF;
            border-radius: var(--radius-default);
            border: 1px solid var(--border-light);
            height: 100%;
        }
        .workflow-num {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--primary);
            color: #FFFFFF;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 15px;
            margin-bottom: 16px;
        }

        /* FAQ 手风琴自定义 */
        .custom-accordion .accordion-item {
            border: 1px solid var(--border-light);
            border-radius: 10px !important;
            margin-bottom: 14px;
            background: #FFFFFF;
            overflow: hidden;
        }
        .custom-accordion .accordion-button {
            font-weight: 600;
            font-size: 16px;
            color: var(--text-heading);
            padding: 18px 24px;
            background: #FFFFFF;
            box-shadow: none;
        }
        .custom-accordion .accordion-button:not(.collapsed) {
            color: var(--primary);
            background: rgba(26, 86, 219, 0.03);
        }
        .custom-accordion .accordion-body {
            color: #475569;
            padding: 18px 24px 24px 24px;
            line-height: 1.8;
            border-top: 1px solid var(--border-light);
        }

        /* 终极转化区 */
        .cta-banner-card {
            background: linear-gradient(135deg, #1A56DB 0%, #0369A1 100%);
            border-radius: 20px;
            padding: 60px 48px;
            color: #FFFFFF;
            box-shadow: 0 20px 40px rgba(25, 0.15); border-radius: 4px; padding: 20px; text-align: center; color: #333; }