/* roulang page: index */
:root {
            --brand-primary: #1E50D8;
            --brand-primary-hover: #153fb0;
            --brand-accent: #00B4D8;
            --brand-warning: #FF5A36;
            --brand-dark: #0B132B;
            --brand-dark-surface: #142042;
            --bg-base: #F8FAFC;
            --bg-card: #FFFFFF;
            --text-heading: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border-light: #E2E8F0;
            --shadow-subtle: 0 10px 30px -5px rgba(15, 23, 42, 0.06), 0 4px 6px -2px rgba(15, 23, 42, 0.03);
            --shadow-hover: 0 20px 35px -5px rgba(30, 80, 216, 0.12), 0 8px 12px -3px rgba(15, 23, 42, 0.05);
            --radius-md: 12px;
            --radius-sm: 8px;
            --radius-pill: 9999px;
            --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
        }

        /* 基础样式复位与标准 */
        * { box-sizing: border-box; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-base);
            color: var(--text-body);
            line-height: 1.65;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

        a { color: var(--brand-primary); text-decoration: none; transition: var(--transition); }
        a:hover, a:focus { color: var(--brand-primary-hover); text-decoration: none; }
        h1, h2, h3, h4, h5, h6 { color: var(--text-heading); font-weight: 700; line-height: 1.35; margin-bottom: 0.5rem; }
        img { max-width: 100%; height: auto; display: block; }

        /* 顶部导航系统 */
        .site-header { position: sticky; top: 0; z-index: 1000; background: #ffffff; box-shadow: 0 1px 10px rgba(0,0,0,0.06); }
        .top-notice-bar { background: #EDF3FE; color: var(--brand-primary); font-size: 0.8125rem; padding: 6px 0; border-bottom: 1px solid #D6E4FF; }
        .top-notice-content { display: flex; justify-content: space-between; align-items: center; }
        .nav-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
        .brand-logo { font-size: 1.45rem; font-weight: 800; color: var(--brand-primary); display: flex; align-items: center; gap: 8px; letter-spacing: -0.5px; }
        .brand-logo span { color: var(--text-heading); }
        .brand-logo .dot { width: 8px; height: 8px; background: var(--brand-warning); border-radius: 50%; display: inline-block; }
        
        .nav-links { display: flex; align-items: center; list-style: none; margin: 0; padding: 0; gap: 28px; }
        .nav-links a { font-weight: 500; font-size: 0.95rem; color: var(--text-body); position: relative; padding: 6px 0; }
        .nav-links a:hover, .nav-links a.active { color: var(--brand-primary); }
        .nav-links a.active::after { content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 2px; background: var(--brand-primary); border-radius: 2px; }

        .btn-main {
            display: inline-flex; align-items: center; justify-content: center;
            background: var(--brand-primary); color: #fff; padding: 10px 24px;
            font-size: 0.95rem; font-weight: 600; border-radius: var(--radius-sm);
            border: 1px solid var(--brand-primary); cursor: pointer; transition: var(--transition);
        }
        .btn-main:hover { background: var(--brand-primary-hover); color: #fff; transform: translateY(-1px); }
        .btn-accent {
            background: var(--brand-warning); border-color: var(--brand-warning); color: #fff;
        }
        .btn-accent:hover { background: #e04724; border-color: #e04724; color: #fff; }
        .btn-outline {
            background: transparent; color: var(--brand-primary); border: 1px solid var(--brand-primary);
        }
        .btn-outline:hover { background: #EEF3FF; color: var(--brand-primary); }
        .btn-outline-white {
            background: transparent; color: #fff; border: 1px solid rgba(255,255,255,0.7);
        }
        .btn-outline-white:hover { background: #fff; color: var(--brand-dark); }

        /* 通用 Section 样式规范 */
        .section-block { padding: 90px 0; position: relative; }
        .section-gray { background-color: #F1F5F9; }
        .section-white { background-color: #FFFFFF; }
        .section-dark { background-color: var(--brand-dark); color: #E2E8F0; }
        .section-dark h2, .section-dark h3, .section-dark h4 { color: #FFFFFF; }

        .section-header { margin-bottom: 54px; }
        .section-header.text-center { text-align: center; }
        .badge-pill {
            display: inline-block; font-size: 0.8rem; font-weight: 600; color: var(--brand-primary);
            background: #EBF1FF; padding: 4px 14px; border-radius: var(--radius-pill);
            margin-bottom: 12px; letter-spacing: 0.5px;
        }
        .badge-pill.badge-dark { background: rgba(0, 180, 216, 0.15); color: var(--brand-accent); }
        .section-title { font-size: 2.15rem; letter-spacing: -0.5px; }
        .section-desc { font-size: 1.05rem; color: var(--text-muted); max-width: 760px; margin: 0 auto; }
        .section-dark .section-desc { color: #94A3B8; }

        /* 卡片公用样式 */
        .ui-card {
            background: var(--bg-card); border-radius: var(--radius-md); border: 1px solid var(--border-light);
            padding: 32px; box-shadow: var(--shadow-subtle); transition: var(--transition); height: 100%;
        }
        .ui-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: #CBD5E1; }

        /* 板块1：全宽沉浸 Hero + 倒计时与双行动按钮 */
        .hero-banner-wrap {
            position: relative; min-height: 600px; padding: 110px 0 90px;
            background: linear-gradient(rgba(11, 19, 43, 0.82), rgba(11, 19, 43, 0.88)), url('/assets/images/7850d6ec05ce118c.jpg') center/cover no-repeat;
            color: #ffffff; display: flex; align-items: center;
        }
        .hero-content-box { max-width: 880px; margin: 0 auto; text-align: center; }
        .hero-title { color: #FFFFFF; font-size: 2.85rem; font-weight: 800; line-height: 1.25; margin-bottom: 22px; }
        .hero-desc { font-size: 1.15rem; line-height: 1.8; color: #CBD5E1; margin-bottom: 34px; max-width: 820px; margin-left: auto; margin-right: auto; }
        .hero-countdown-strip {
            display: inline-flex; align-items: center; background: rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(8px); border: 1px solid rgba(255, 255, 255, 0.2);
            padding: 10px 24px; border-radius: var(--radius-pill); margin-bottom: 34px; gap: 16px;
        }
        .countdown-item { font-size: 0.9rem; font-weight: 600; color: #E2E8F0; }
        .countdown-item b { color: var(--brand-accent); font-size: 1.15rem; margin-right: 4px; }
        .hero-actions { display: flex; justify-content: center; gap: 18px; margin-bottom: 40px; }

        /* 板块2：卖点三连 */
        .usp-icon-circle {
            width: 58px; height: 58px; border-radius: 14px; background: #EFF4FE;
            color: var(--brand-primary); display: flex; align-items: center; justify-content: center;
            font-size: 1.5rem; font-weight: bold; margin-bottom: 20px;
        }

        /* 板块3：入口矩阵 */
        .portal-item {
            background: #ffffff; border: 1px solid var(--border-light); border-radius: var(--radius-md);
            padding: 24px; display: flex; align-items: flex-start; gap: 18px; transition: var(--transition);
        }
        .portal-item:hover { border-color: var(--brand-primary); transform: translateY(-3px); box-shadow: var(--shadow-hover); }
        .portal-num {
            font-size: 1.4rem; font-weight: 800; color: var(--brand-accent); line-height: 1; min-width: 32px;
        }

        /* 板块4：最新发布（终端版本） */
        .pricing-card {
            background: #ffffff; border-radius: var(--radius-md); border: 1px solid var(--border-light);
            padding: 40px 32px; position: relative; transition: var(--transition);
        }
        .pricing-card.featured {
            border: 2px solid var(--brand-primary); transform: scale(1.03); box-shadow: var(--shadow-hover);
        }
        .pricing-badge {
            position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
            background: var(--brand-primary); color: #fff; font-size: 0.75rem; font-weight: 700;
            padding: 4px 16px; border-radius: var(--radius-pill);
        }
        .check-list { list-style: none; margin: 24px 0 32px; padding: 0; }
        .check-list li { padding: 8px 0; color: var(--text-body); font-size: 0.95rem; display: flex; align-items: center; gap: 10px; }
        .check-list li::before {
            content: '✓'; color: var(--brand-primary); font-weight: bold;
        }

        /* 板块5：热门专题（底层算法与数据管道） */
        .tech-box {
            background: var(--brand-dark-surface); border: 1px solid rgba(255,255,255,0.08);
            border-radius: var(--radius-md); padding: 30px; height: 100%;
        }
        .code-preview {
            background: #080D1D; border-radius: var(--radius-sm); padding: 18px;
            font-family: Menlo, Monaco, Consolas, monospace; font-size: 0.85rem; color: #38BDF8;
            border: 1px solid rgba(255,255,255,0.05); overflow-x: auto;
        }

        /* 板块6：用户实战场景故事 */
        .story-img-wrap { border-radius: var(--radius-md); overflow: hidden; height: 260px; }
        .story-img-wrap img { width: 100%; height: 100%; object-fit: cover; }

        /* 板块7：数据指标横幅 */
        .metric-stat-box { text-align: center; padding: 24px 16px; }
        .stat-value { font-size: 2.75rem; font-weight: 800; color: var(--brand-primary); line-height: 1.1; margin-bottom: 8px; }
        .stat-label { font-size: 0.95rem; color: var(--text-muted); font-weight: 500; }

        /* 板块8：资讯与研报列表 */
        .news-item-row {
            display: flex; gap: 20px; align-items: center; padding: 18px 0; border-bottom: 1px solid var(--border-light);
        }
        .news-date { min-width: 70px; text-align: center; background: #EEF2F6; border-radius: 6px; padding: 6px; }
        .news-date .day { font-size: 1.25rem; font-weight: 800; color: var(--brand-primary); display: block; line-height: 1; }
        .news-date .month { font-size: 0.75rem; color: var(--text-muted); }

        /* 板块9：合规与安全保障 */
        .security-badge-item {
            text-align: center; padding: 30px 20px; background: #ffffff; border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
        }

        /* 板块10：专家口碑与分析师评测 */
        .review-quote {
            font-style: italic; color: var(--text-body); font-size: 0.95rem; margin-bottom: 20px; position: relative;
        }
        .reviewer-info { display: flex; align-items: center; gap: 14px; }
        .reviewer-avatar {
            width: 46px; height: 46px; border-radius: 50%; background: #CBD5E1;
            display: flex; align-items: center; justify-content: center; font-weight: 700; color: #475569;
        }

        /* 板块11：快速解答 FAQ 手风琴 */
        .faq-accordion-item {
            background: #ffffff; border: 1px solid var(--border-light); border-radius: var(--radius-md);
            margin-bottom: 16px; overflow: hidden;
        }
        .faq-accordion-title {
            padding: 20px 24px; font-weight: 700; font-size: 1.05rem; cursor: pointer;
            display: flex; justify-content: space-between; align-items: center; user-select: none;
        }
        .faq-accordion-title::after { content: '+'; font-size: 1.4rem; color: var(--brand-primary); }
        .faq-accordion-item.is-active .faq-accordion-title::after { content: '−'; }
        .faq-accordion-content {
            padding: 0 24px 20px; color: var(--text-body); font-size: 0.95rem; line-height: 1.7; display: none;
        }
        .faq-accordion-item.is-active .faq-accordion-content { display: block; }

        /* 板块12：转化与预约演示 */
        .cta-box-gradient {
            background: linear-gradient(135deg, var(--brand-primary) 0%, #0F37A8 100%);
            border-radius: var(--radius-md); padding: 56px 40px; color: #fff; text-align: center;
        }
        .cta-form-strip {
            max-width: 540px; margin: 30px auto 0; display: flex; gap: 10px;
        }
        .cta-form-strip input {
            background: #fff; border: none; height: 50px; border-radius: var(--radius-sm);
            padding: 0 18px; font-size: 0.95rem; margin: 0;
        }

        /* 页脚规范系统 */
        .site-footer { background: #070C1B; color: #94A3B8; padding: 70px 0 30px; font-size: 0.9rem; }
        .footer-logo { font-size: 1.35rem; font-weight: 800; color: #ffffff; margin-bottom: 16px; }
        .footer-heading { color: #ffffff; font-size: 1rem; font-weight: 700; margin-bottom: 18px; }
        .footer-links { list-style: none; margin: 0; padding: 0; }
        .footer-links li { margin-bottom: 10px; }
        .footer-links a { color: #94A3B8; }
        .footer-links a:hover { color: #ffffff; }
        .footer-bottom {
            margin-top: 50px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,0.08);
            display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 14px;
        }

        /* 移动端与自适应响应 */
        @media screen and (max-width: 1023px) {
            .nav-links { display: none; }
            .hero-title { font-size: 2.15rem; }
            .section-block { padding: 60px 0; }
            .pricing-card.featured { transform: none; }
        }
        @media screen and (max-width: 639px) {
            .hero-title { font-size: 1.85rem; }
            .hero-actions { flex-direction: column; }
            .cta-form-strip { flex-direction: column; }
            .cta-form-strip input { width: 100%; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }