/* roulang page: index */
:root {
      --primary: #0F3875;
      --primary-light: #1D70B8;
      --accent: #10B981;
      --dark-navy: #0A192F;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --bg-light: #F4F7FB;
      --white: #FFFFFF;
      --border: #E2E8F0;
      --radius: 10px;
      --shadow-sm: 0 4px 20px -2px rgba(15, 56, 117, 0.06);
      --shadow-hover: 0 14px 28px -4px rgba(15, 56, 117, 0.12);
      --transition: all 0.28s ease;
      --font-main: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
    }

    * { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body { font-family: var(--font-main); color: var(--text-main); background-color: var(--white); line-height: 1.65; -webkit-font-smoothing: antialiased; }
    img { max-width: 100%; height: auto; display: block; }
    a { text-decoration: none; color: inherit; }
    button, input { font-family: inherit; }

    .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
    .section-padding { padding: 88px 0; }
    .bg-light-alt { background-color: var(--bg-light); }
    .bg-dark-navy { background-color: var(--dark-navy); color: #E2E8F0; }

    /* 标题系统 */
    .section-head { text-align: center; max-width: 760px; margin: 0 auto 52px; }
    .section-tag { display: inline-block; padding: 4px 14px; background: rgba(29, 112, 184, 0.08); color: var(--primary-light); font-size: 13px; font-weight: 600; border-radius: 20px; margin-bottom: 12px; }
    .bg-dark-navy .section-tag { background: rgba(16, 185, 129, 0.15); color: var(--accent); }
    .section-title { font-size: 32px; font-weight: 700; color: var(--primary); line-height: 1.35; margin-bottom: 14px; }
    .bg-dark-navy .section-title { color: var(--white); }
    .section-desc { font-size: 16px; color: var(--text-muted); line-height: 1.7; }
    .bg-dark-navy .section-desc { color: #94A3B8; }

    /* 顶部导航 */
    .site-header { position: sticky; top: 0; z-index: 1000; background: var(--white); box-shadow: 0 2px 12px rgba(15, 56, 117, 0.05); }
    .top-bar { background: #0A1C36; color: #94A3B8; font-size: 12px; padding: 8px 0; border-bottom: 1px solid rgba(255,255,255,0.06); }
    .top-bar-inner { display: flex; justify-content: space-between; align-items: center; }
    .main-nav { padding: 14px 0; display: flex; justify-content: space-between; align-items: center; }
    .brand-logo { font-size: 22px; font-weight: 800; color: var(--primary); display: flex; align-items: center; gap: 8px; letter-spacing: -0.5px; }
    .brand-badge { background: var(--accent); color: var(--white); font-size: 11px; padding: 2px 6px; border-radius: 4px; font-weight: 600; }
    .nav-links { display: flex; list-style: none; gap: 28px; align-items: center; }
    .nav-link { font-size: 15px; font-weight: 500; color: var(--text-main); transition: var(--transition); }
    .nav-link:hover, .nav-link.active { color: var(--primary-light); }
    .btn-header { padding: 9px 20px; background: var(--primary); color: var(--white); border-radius: 6px; font-size: 14px; font-weight: 600; transition: var(--transition); }
    .btn-header:hover { background: var(--primary-light); transform: translateY(-1px); }

    /* 按钮通用 */
    .btn { display: inline-flex; align-items: center; justify-content: center; padding: 12px 28px; border-radius: 6px; font-size: 15px; font-weight: 600; cursor: pointer; transition: var(--transition); border: none; text-align: center; }
    .btn-primary { background: var(--primary); color: var(--white); }
    .btn-primary:hover { background: var(--primary-light); box-shadow: 0 6px 16px rgba(15, 56, 117, 0.25); }
    .btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text-main); }
    .btn-outline:hover { background: #F8FAFC; border-color: var(--primary-light); color: var(--primary-light); }
    .btn-accent { background: var(--accent); color: var(--white); }
    .btn-accent:hover { background: #0ea371; box-shadow: 0 6px 16px rgba(16, 185, 129, 0.25); }

    /* 1. Hero 区域：白皮书获客与即时动态 */
    .hero-section { position: relative; padding: 80px 0; background-color: #0c203f; background-image: linear-gradient(135deg, rgba(10, 25, 47, 0.92) 0%, rgba(15, 56, 117, 0.88) 100%), url('/assets/images/fa4dcaa7d9319b68.png'); background-size: cover; background-position: center; color: var(--white); }
    .hero-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 48px; align-items: center; }
    .hero-content h1 { font-size: 42px; font-weight: 800; line-height: 1.25; margin-bottom: 20px; letter-spacing: -0.5px; }
    .hero-lead { font-size: 16px; line-height: 1.8; color: #CBD5E1; margin-bottom: 30px; text-align: justify; }
    .hero-features-list { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 32px; font-size: 14px; color: #E2E8F0; }
    .hero-features-list li { display: flex; align-items: center; gap: 8px; }
    .hero-card { background: var(--white); border-radius: 12px; padding: 32px; color: var(--text-main); box-shadow: 0 20px 40px rgba(0,0,0,0.25); }
    .hero-card-header { border-bottom: 1px solid var(--border); padding-bottom: 16px; margin-bottom: 20px; }
    .hero-card-header h3 { font-size: 18px; color: var(--primary); font-weight: 700; margin-bottom: 4px; }
    .hero-card-header p { font-size: 13px; color: var(--text-muted); }
    .hero-form-group { margin-bottom: 16px; }
    .hero-form-group label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; color: var(--text-main); }
    .hero-form-input { width: 100%; padding: 11px 14px; border: 1px solid var(--border); border-radius: 6px; font-size: 14px; outline: none; transition: var(--transition); }
    .hero-form-input:focus { border-color: var(--primary-light); box-shadow: 0 0 0 3px rgba(29, 112, 184, 0.12); }
    .hero-card-meta { display: flex; align-items: center; justify-content: space-between; margin-top: 14px; font-size: 12px; color: var(--text-muted); }

    /* 2. 学习目标 / 赛事资讯矩阵 */
    .matrix-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
    .matrix-card { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px 24px; transition: var(--transition); box-shadow: var(--shadow-sm); }
    .matrix-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: #CBD5E1; }
    .matrix-icon-box { width: 44px; height: 44px; background: rgba(15, 56, 117, 0.06); border-radius: 8px; display: flex; align-items: center; justify-content: center; font-weight: 700; color: var(--primary); margin-bottom: 18px; font-size: 18px; }
    .matrix-card h3 { font-size: 18px; color: var(--primary); margin-bottom: 10px; font-weight: 700; }
    .matrix-card p { font-size: 14px; color: var(--text-muted); line-height: 1.6; }

    /* 3. 课程路径 / 全球赛事资讯采集与分发全景图 */
    .pathway-row { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; margin-bottom: 40px; }
    .pathway-img-box { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); }
    .pathway-img-box img { width: 100%; height: 320px; object-fit: cover; }
    .pathway-desc h3 { font-size: 22px; color: var(--primary); margin-bottom: 14px; font-weight: 700; }
    .pathway-desc p { font-size: 15px; color: var(--text-muted); margin-bottom: 20px; line-height: 1.7; }
    .metric-badge-group { display: flex; flex-wrap: wrap; gap: 10px; }
    .metric-chip { background: #EEF2F6; color: var(--primary); padding: 6px 14px; border-radius: 4px; font-size: 13px; font-weight: 600; }

    /* 4. 进度模块 / 核心壁垒六格 */
    .barrier-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
    .barrier-card { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 30px; box-shadow: var(--shadow-sm); transition: var(--transition); }
    .barrier-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: var(--primary-light); }
    .barrier-card h3 { font-size: 18px; color: var(--primary); margin-bottom: 10px; font-weight: 700; display: flex; justify-content: space-between; align-items: center; }
    .barrier-card p { font-size: 14px; color: var(--text-muted); line-height: 1.65; margin-bottom: 16px; }
    .barrier-tag { font-size: 12px; color: var(--primary-light); background: #F0F7FD; padding: 3px 10px; border-radius: 4px; font-weight: 500; }

    /* 5. 热门专栏方案 */
    .columns-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
    .col-card { background: var(--white); border-radius: var(--radius); border: 1px solid var(--border); overflow: hidden; box-shadow: var(--shadow-sm); transition: var(--transition); display: flex; flex-direction: column; }
    .col-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); }
    .col-img { height: 190px; overflow: hidden; }
    .col-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
    .col-card:hover .col-img img { transform: scale(1.05); }
    .col-body { padding: 24px; flex-grow: 1; display: flex; flex-direction: column; }
    .col-tag-row { display: flex; gap: 8px; margin-bottom: 12px; }
    .col-badge { font-size: 12px; font-weight: 600; padding: 2px 8px; border-radius: 4px; background: #E2E8F0; color: #475569; }
    .col-badge.highlight { background: #DCFCE7; color: #166534; }
    .col-body h3 { font-size: 19px; color: var(--primary); margin-bottom: 10px; font-weight: 700; }
    .col-body p { font-size: 14px; color: var(--text-muted); line-height: 1.6; margin-bottom: 20px; flex-grow: 1; }
    .col-footer { padding-top: 14px; border-top: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; }
    .col-stat { font-size: 13px; font-weight: 600; color: var(--primary-light); }

    /* 6. 成果墙 / 架构理念与数据标准（深色） */
    .arch-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
    .arch-item { background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.08); border-radius: var(--radius); padding: 32px 20px; }
    .arch-num { font-size: 38px; font-weight: 800; color: var(--accent); margin-bottom: 8px; font-feature-settings: "tnum"; }
    .arch-label { font-size: 16px; font-weight: 600; color: var(--white); margin-bottom: 6px; }
    .arch-desc { font-size: 13px; color: #94A3B8; line-height: 1.5; }

    /* 7. 案例墙 / 赛事资讯引入落地场景 */
    .case-container { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
    .case-card { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow-sm); }
    .case-type { font-size: 12px; font-weight: 700; color: var(--primary-light); text-transform: uppercase; margin-bottom: 10px; }
    .case-card h3 { font-size: 18px; color: var(--text-main); margin-bottom: 12px; font-weight: 700; }
    .case-card p { font-size: 14px; color: var(--text-muted); line-height: 1.65; margin-bottom: 18px; }
    .case-metrics { background: var(--bg-light); padding: 12px 14px; border-radius: 6px; font-size: 13px; color: var(--primary); font-weight: 600; display: flex; justify-content: space-between; }

    /* 8. 资讯摘要列表 */
    .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
    .news-card { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; transition: var(--transition); }
    .news-card:hover { border-color: var(--primary-light); box-shadow: var(--shadow-sm); }
    .news-meta { display: flex; justify-content: space-between; font-size: 12px; color: var(--text-muted); margin-bottom: 10px; }
    .news-card h3 { font-size: 16px; color: var(--text-main); font-weight: 700; margin-bottom: 10px; line-height: 1.45; }
    .news-card p { font-size: 13px; color: var(--text-muted); line-height: 1.6; }

    /* 9. 流程保障步骤条 */
    .steps-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; position: relative; }
    .step-item { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; position: relative; }
    .step-badge { width: 32px; height: 32px; background: var(--primary); color: var(--white); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 14px; margin-bottom: 14px; }
    .step-item h3 { font-size: 16px; color: var(--primary); margin-bottom: 8px; font-weight: 700; }
    .step-item p { font-size: 13px; color: var(--text-muted); line-height: 1.6; }

    /* 10. 用户评价 / 行业口碑 */
    .testi-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
    .testi-card { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow-sm); }
    .testi-stars { color: #F59E0B; margin-bottom: 12px; font-size: 14px; }
    .testi-card p { font-size: 14px; color: var(--text-main); line-height: 1.7; margin-bottom: 18px; font-style: italic; }
    .testi-author { display: flex; align-items: center; gap: 12px; }
    .testi-avatar { width: 42px; height: 42px; border-radius: 50%; background: #CBD5E1; object-fit: cover; }
    .testi-info h4 { font-size: 14px; font-weight: 700; color: var(--primary); }
    .testi-info span { font-size: 12px; color: var(--text-muted); }

    /* 11. 常见问题 FAQ 手风琴 */
    .faq-wrapper { max-width: 860px; margin: 0 auto; }
    .faq-item { border: 1px solid var(--border); border-radius: var(--radius); background: var(--white); margin-bottom: 14px; overflow: hidden; }
    .faq-title { padding: 18px 24px; font-size: 16px; font-weight: 700; color: var(--text-main); cursor: pointer; display: flex; justify-content: space-between; align-items: center; user-select: none; }
    .faq-title:hover { color: var(--primary-light); }
    .faq-content { padding: 0 24px 20px; font-size: 14px; color: var(--text-muted); line-height: 1.7; display: block; border-top: 1px solid #F1F5F9; margin-top: -6px; padding-top: 14px; }
    .faq-indicator { font-weight: 400; font-size: 18px; color: var(--text-muted); }

    /* 12. 立即订阅与接入行动号召 (CTA) */
    .cta-box { background-color: var(--primary); background-image: radial-gradient(circle at top right, rgba(29, 112, 184, 0.4), transparent 60%); border-radius: 16px; padding: 56px 48px; color: var(--white); text-align: center; }
    .cta-box h2 { font-size: 32px; font-weight: 800; margin-bottom: 16px; }
    .cta-box p { font-size: 16px; color: #CBD5E1; max-width: 680px; margin: 0 auto 32px; line-height: 1.7; }
    .cta-form { display: flex; justify-content: center; gap: 12px; max-width: 520px; margin: 0 auto; }
    .cta-input { flex: 1; padding: 14px 18px; border-radius: 6px; border: none; font-size: 15px; outline: none; }
    .cta-privacy { font-size: 12px; color: #94A3B8; margin-top: 16px; }

    /* 页脚 */
    .site-footer { background: #071322; color: #94A3B8; padding: 64px 0 32px; font-size: 14px; border-top: 1px solid rgba(255,255,255,0.06); }
    .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 40px; margin-bottom: 48px; }
    .footer-brand h4 { font-size: 20px; color: var(--white); font-weight: 800; margin-bottom: 14px; }
    .footer-brand p { line-height: 1.7; font-size: 13px; color: #94A3B8; max-width: 320px; }
    .footer-col h5 { font-size: 15px; color: var(--white); font-weight: 700; margin-bottom: 18px; }
    .footer-links { list-style: none; display: flex; flex-direction: column; gap: 10px; }
    .footer-links a { color: #94A3B8; transition: var(--transition); }
    .footer-links a:hover { color: var(--accent); }
    .footer-contact-item { margin-bottom: 8px; line-height: 1.6; }
    .footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding-top: 24px; text-align: center; font-size: 13px; color: #64748B; }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .matrix-grid, .arch-grid, .steps-row { grid-template-columns: repeat(2, 1fr); }
      .barrier-grid, .columns-grid, .case-container, .news-grid, .testi-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      .top-bar { display: none; }
      .hero-grid { grid-template-columns: 1fr; }
      .hero-content h1 { font-size: 30px; }
      .pathway-row { grid-template-columns: 1fr; }
      .barrier-grid, .columns-grid, .case-container, .news-grid, .testi-grid, .matrix-grid, .arch-grid, .steps-row { grid-template-columns: 1fr; }
      .cta-form { flex-direction: column; }
      .footer-grid { grid-template-columns: 1fr; }
      .nav-links { display: none; }
      .section-padding { padding: 56px 0; }
    }