/* roulang page: index */
/* ----- 设计变量 ----- */
    :root {
      --primary-deep: #0D3B3B;
      --primary-soft: #1A5C5C;
      --accent-amber: #F29F05;
      --accent-amber-dark: #D98600;
      --accent-red: #D94A4A;
      --bg-warm: #F7F5F0;
      --bg-white: #FFFFFF;
      --text-primary: #1E2B2C;
      --text-secondary: #4A5C5E;
      --text-on-dark: #F0EDE6;
      --border-light: #E5E0D8;
      --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.04);
      --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.08);
      --radius-card: 20px;
      --radius-button: 40px;
      --radius-input: 12px;
      --font-title: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      --font-mono: "Inter", "SF Mono", "Menlo", monospace;
      --font-en: "Inter", "PingFang SC", sans-serif;
      --transition-smooth: 0.25s cubic-bezier(0.2, 0.0, 0, 1.0);
    }

    /* ----- 重置与基础 ----- */
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
      -webkit-font-smoothing: antialiased;
    }

    body {
      font-family: var(--font-body);
      background-color: var(--bg-warm);
      color: var(--text-primary);
      line-height: 1.7;
      font-weight: 400;
      overflow-x: hidden;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition-smooth);
    }

    button, input {
      font-family: inherit;
      border: none;
      outline: none;
      background: none;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    @media (max-width: 768px) {
      .container {
        padding: 0 16px;
      }
    }

    /* 通用板块间距 */
    .section {
      margin: 100px 0;
    }

    @media (max-width: 768px) {
      .section {
        margin: 64px 0;
      }
    }

    /* 标题系统 */
    h2 {
      font-family: var(--font-title);
      font-weight: 700;
      font-size: 2.2rem;
      color: var(--primary-deep);
      margin-bottom: 12px;
      letter-spacing: -0.3px;
    }
    .section-title-wrapper {
      margin-bottom: 40px;
      display: flex;
      align-items: baseline;
      flex-wrap: wrap;
      gap: 10px;
    }
    .section-sub-en {
      font-family: var(--font-en);
      font-weight: 600;
      font-size: 1rem;
      color: var(--accent-amber);
      letter-spacing: 1px;
      text-transform: uppercase;
      margin-left: 8px;
    }

    /* ----- 导航栏 ----- */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 72px;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      border-bottom: 1px solid rgba(0,0,0,0.03);
      z-index: 100;
      display: flex;
      align-items: center;
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }
    .logo-area {
      display: flex;
      align-items: center;
      gap: 6px;
      font-family: var(--font-title);
      font-weight: 800;
      font-size: 1.5rem;
      color: var(--primary-deep);
      letter-spacing: -0.5px;
    }
    .logo-diamond {
      display: inline-block;
      width: 10px;
      height: 10px;
      background: var(--primary-deep);
      transform: rotate(45deg);
      margin-right: 4px;
    }
    .nav-links {
      display: flex;
      gap: 28px;
      font-weight: 500;
      font-size: 0.95rem;
      color: var(--text-secondary);
    }
    .nav-links a {
      position: relative;
      padding: 4px 0;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent-amber);
      transition: width 0.2s;
    }
    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }
    .nav-links a:hover {
      color: var(--primary-deep);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .search-icon {
      font-size: 1.2rem;
      color: var(--text-secondary);
      cursor: pointer;
    }
    .login-text {
      font-weight: 500;
      font-size: 0.9rem;
      color: var(--primary-deep);
    }
    .btn-bet {
      background: var(--accent-amber);
      color: white;
      font-weight: 700;
      padding: 10px 24px;
      border-radius: var(--radius-button);
      box-shadow: 0 4px 10px rgba(242, 159, 5, 0.3);
      transition: all 0.25s;
      font-size: 0.9rem;
    }
    .btn-bet:hover {
      background: var(--accent-amber-dark);
      box-shadow: 0 6px 14px rgba(217, 134, 0, 0.4);
    }
    .mobile-menu-toggle {
      display: none;
      font-size: 1.6rem;
      color: var(--primary-deep);
    }
    @media (max-width: 768px) {
      .nav-links, .header-actions .search-icon, .header-actions .login-text {
        display: none;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .header-actions .btn-bet {
        padding: 8px 18px;
        font-size: 0.8rem;
      }
    }

    /* ----- 首屏 Hero ----- */
    .hero {
      margin-top: 72px;
      padding: 60px 0 40px;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .hero-left h1 {
      font-family: var(--font-title);
      font-weight: 800;
      font-size: 2.8rem;
      color: var(--primary-deep);
      line-height: 1.3;
      margin-bottom: 16px;
    }
    .hero-sub {
      font-size: 1.15rem;
      color: var(--text-secondary);
      margin-bottom: 24px;
    }
    .badge-row {
      display: flex;
      gap: 20px;
      margin-bottom: 32px;
      flex-wrap: wrap;
    }
    .badge-item {
      background: white;
      border-radius: 30px;
      padding: 6px 16px;
      display: flex;
      align-items: center;
      gap: 6px;
      box-shadow: 0 2px 8px rgba(0,0,0,0.03);
      font-weight: 600;
      font-size: 0.9rem;
    }
    .badge-dot {
      width: 8px;
      height: 8px;
      background: var(--accent-amber);
      border-radius: 50%;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--accent-amber);
      color: white;
      font-weight: 700;
      padding: 14px 32px;
      border-radius: var(--radius-button);
      transition: 0.2s;
      display: inline-block;
    }
    .btn-primary:hover { background: var(--accent-amber-dark); }
    .btn-outline {
      border: 2px solid var(--primary-deep);
      color: var(--primary-deep);
      font-weight: 600;
      padding: 14px 32px;
      border-radius: var(--radius-button);
      transition: 0.2s;
    }
    .btn-outline:hover { background: rgba(13,59,59,0.05); }
    
    .hero-right {
      background: linear-gradient(135deg, #0D3B3B 0%, #1A5C5C 100%);
      border-radius: 32px;
      padding: 24px;
      color: white;
    }
    .match-card {
      background: rgba(255,255,255,0.1);
      backdrop-filter: blur(8px);
      border-radius: 24px;
      padding: 20px;
    }
    .league-tag {
      background: var(--accent-amber);
      display: inline-block;
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 0.75rem;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .teams {
      display: flex;
      justify-content: space-between;
      font-weight: 700;
      font-size: 1.2rem;
      margin-bottom: 16px;
    }
    .odds-row {
      display: flex;
      gap: 12px;
      font-family: var(--font-mono);
      margin-bottom: 16px;
    }
    .odd-item {
      background: rgba(0,0,0,0.25);
      padding: 6px 14px;
      border-radius: 20px;
    }
    .odd-highlight {
      background: var(--accent-amber);
      color: #0D3B3B;
    }
    .timer-badge {
      font-family: var(--font-mono);
      display: flex;
      align-items: center;
      gap: 6px;
      animation: pulse 1.5s infinite;
    }
    @keyframes pulse { 0%{opacity:1;} 50%{opacity:0.6;} 100%{opacity:1;} }
    @media (max-width: 768px) {
      .hero-grid { grid-template-columns: 1fr; }
      .hero-left h1 { font-size: 2rem; }
    }

    /* 亮点网格 */
    .highlights-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      grid-template-rows: auto auto;
      gap: 24px;
    }
    .highlight-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 28px;
      box-shadow: var(--shadow-card);
      transition: var(--transition-smooth);
    }
    .highlight-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
    .card-tall { grid-row: span 2; }
    .highlight-icon { font-size: 2rem; margin-bottom: 16px; }
    .data-badge { color: var(--accent-amber); font-weight: 700; }

    @media (max-width: 768px) {
      .highlights-grid { grid-template-columns: 1fr; }
    }

    /* 赛事瀑布流 */
    .waterfall-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .event-card {
      background: white;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      transition: var(--transition-smooth);
    }
    .event-card:hover { transform: scale(1.02); box-shadow: var(--shadow-hover); }
    .event-img { height: 180px; background-size: cover; background-position: center; }
    .event-info { padding: 20px; }
    @media (max-width: 768px) { .waterfall-grid { grid-template-columns: 1fr; } }

    /* 对比表 */
    .compare-table {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }
    .compare-col {
      background: white;
      border-radius: var(--radius-card);
      padding: 28px;
    }
    .compare-col.highlight-col {
      background: var(--primary-deep);
      color: white;
    }
    .compare-row { display: flex; justify-content: space-between; padding: 12px 0; border-bottom: 1px solid var(--border-light); }
    @media (max-width: 768px) { .compare-table { grid-template-columns: 1fr; } }

    /* 数据带 */
    .trust-strip {
      background: var(--primary-deep);
      color: white;
      border-radius: 28px;
      padding: 40px;
      display: flex;
      justify-content: space-around;
      flex-wrap: wrap;
      text-align: center;
    }
    .trust-number {
      font-family: var(--font-mono);
      font-size: 2.2rem;
      font-weight: 700;
    }

    /* FAQ */
    .faq-item {
      background: white;
      border-radius: 16px;
      margin-bottom: 12px;
      padding: 18px 24px;
      cursor: pointer;
    }
    .faq-question { display: flex; justify-content: space-between; font-weight: 600; }

    /* CTA 横幅 */
    .cta-banner {
      background: linear-gradient(135deg, #0D3B3B, #1A5C5C);
      border-radius: 32px;
      padding: 60px 40px;
      text-align: center;
      color: white;
    }

    /* 页脚 */
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 30px;
      padding: 60px 0;
    }
    @media (max-width: 768px) { .footer-grid { grid-template-columns: 1fr 1fr; } }