/* roulang page: index */
:root {
      --primary-deep: #0B5E42;
      --primary-hover: #094D36;
      --accent-orange: #E85D04;
      --silver-bg: #F0F4F8;
      --soft-bg: #F7F9FC;
      --text-body: #4A5568;
      --text-muted: #718096;
      --text-dark: #2D3748;
      --border-light: #E2E8F0;
      --border-input: #CBD5E0;
      --white: #FFFFFF;
      --footer-dark: #1A202C;
      --footer-text: #A0AEC0;
      --card-shadow: 0 4px 14px rgba(0, 0, 0, 0.04);
      --card-shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.08);
      --radius-card: 12px;
      --radius-btn: 8px;
      --font-sans: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
      --transition: all 0.25s ease;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--white);
      color: var(--text-body);
      line-height: 1.6;
      margin: 0;
      padding-top: 76px;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 15px;
      padding-right: 15px;
    }
    /* 导航栏 */
    .navbar {
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-light);
      padding: 0.8rem 0;
      transition: var(--transition);
    }
    .navbar.scrolled {
      background: rgba(255, 255, 255, 0.98);
      box-shadow: 0 2px 12px rgba(0,0,0,0.04);
    }
    .navbar-brand {
      font-weight: 700;
      font-size: 1.5rem;
      letter-spacing: -0.3px;
      color: var(--primary-deep) !important;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .navbar-brand i {
      font-size: 1.8rem;
      color: var(--primary-deep);
    }
    .navbar-nav .nav-link {
      color: var(--text-dark) !important;
      font-size: 0.95rem;
      font-weight: 500;
      letter-spacing: 0.8px;
      margin: 0 0.5rem;
      padding: 0.25rem 0.2rem;
      position: relative;
      transition: var(--transition);
    }
    .navbar-nav .nav-link::after {
      content: '';
      position: absolute;
      bottom: -2px;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--primary-deep);
      transition: width 0.25s ease;
    }
    .navbar-nav .nav-link:hover::after,
    .navbar-nav .nav-link.active::after {
      width: 100%;
    }
    .navbar-toggler {
      border: none;
      box-shadow: none;
    }
    /* Hero */
    #hero {
      background: linear-gradient(135deg, #F4F9F6 0%, #FFFFFF 100%);
      padding: 3.5rem 0 4rem;
    }
    .hero-title {
      font-size: 2.75rem;
      font-weight: 700;
      line-height: 1.3;
      letter-spacing: -0.5px;
      color: var(--text-dark);
    }
    .hero-sub {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 480px;
      margin: 1.2rem 0 2rem;
    }
    .btn-primary-custom {
      background: var(--primary-deep);
      border: none;
      color: white;
      padding: 0.75rem 2rem;
      font-weight: 600;
      border-radius: var(--radius-btn);
      transition: var(--transition);
    }
    .btn-primary-custom:hover {
      background: var(--primary-hover);
      box-shadow: 0 6px 18px rgba(11,94,66,0.25);
      color: white;
    }
    .btn-outline-custom {
      background: transparent;
      border: 1.5px solid var(--primary-deep);
      color: var(--primary-deep);
      padding: 0.75rem 2rem;
      font-weight: 600;
      border-radius: var(--radius-btn);
    }
    .btn-outline-custom:hover {
      background: rgba(11,94,66,0.05);
      color: var(--primary-deep);
    }
    .btn-cta {
      background: var(--accent-orange);
      border: none;
      color: white;
      font-weight: 600;
      padding: 0.8rem 2.2rem;
      border-radius: var(--radius-btn);
      box-shadow: 0 4px 12px rgba(232,93,4,0.3);
      animation: pulse 2s infinite;
    }
    .btn-cta:hover {
      background: #cc5200;
      color: white;
    }
    @keyframes pulse {
      0% { box-shadow: 0 0 0 0 rgba(232,93,4,0.4); }
      70% { box-shadow: 0 0 0 10px rgba(232,93,4,0); }
      100% { box-shadow: 0 0 0 0 rgba(232,93,4,0); }
    }
    .live-badge {
      background: var(--accent-orange);
      color: white;
      font-size: 0.7rem;
      font-weight: 600;
      padding: 0.2rem 0.6rem;
      border-radius: 20px;
    }
    .score-sim {
      background: white;
      border-radius: 16px;
      padding: 1.5rem;
      box-shadow: var(--card-shadow);
      border: 1px solid var(--border-light);
    }
    .score-team {
      font-weight: 700;
      font-size: 1.2rem;
    }
    .score-number {
      font-size: 2.4rem;
      font-weight: 700;
      color: var(--primary-deep);
    }
    /* 区块通用 */
    section {
      padding: 4.5rem 0;
    }
    .section-title {
      font-size: 2rem;
      font-weight: 600;
      color: var(--text-dark);
      margin-bottom: 0.75rem;
    }
    .section-sub {
      color: var(--text-muted);
      font-size: 1.1rem;
      margin-bottom: 2.5rem;
    }
    .bg-soft {
      background-color: var(--soft-bg);
    }
    .bg-silver {
      background-color: var(--silver-bg);
    }
    /* 卡片 */
    .custom-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 2rem 1.75rem;
      box-shadow: var(--card-shadow);
      transition: var(--transition);
      height: 100%;
      border: 1px solid rgba(0,0,0,0.02);
    }
    .custom-card:hover {
      box-shadow: var(--card-shadow-hover);
      transform: translateY(-4px);
    }
    .icon-circle {
      width: 50px;
      height: 50px;
      background: rgba(11,94,66,0.08);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-deep);
      font-size: 1.5rem;
      margin-bottom: 1.2rem;
    }
    .data-number {
      font-size: 2.2rem;
      font-weight: 700;
      color: var(--primary-deep);
      line-height: 1.2;
    }
    .live-ticker {
      background: #EDF2F7;
      border-radius: 30px;
      padding: 0.5rem 1.5rem;
      display: flex;
      align-items: center;
      gap: 12px;
      overflow-x: auto;
      white-space: nowrap;
    }
    .live-dot {
      width: 10px;
      height: 10px;
      background: #22c55e;
      border-radius: 50%;
      display: inline-block;
      animation: blink 1.2s infinite;
    }
    @keyframes blink { 0%,100%{opacity:1;} 50%{opacity:0.3;} }
    .compare-card-left {
      background: #fff5f5;
      border-left: 4px solid #fc8181;
    }
    .compare-card-right {
      background: #f0fff4;
      border-left: 4px solid var(--primary-deep);
    }
    .accordion-button {
      font-weight: 500;
      font-size: 1.1rem;
      background: transparent;
      box-shadow: none;
      border-bottom: 1px solid var(--border-light);
    }
    .accordion-button:not(.collapsed) {
      background: #F7F9FC;
      color: var(--primary-deep);
    }
    .accordion-item {
      border: none;
      border-bottom: 1px solid var(--border-light);
    }
    footer {
      background: var(--footer-dark);
      color: var(--footer-text);
      padding: 3rem 0 1.5rem;
    }
    footer a {
      color: var(--footer-text);
    }
    footer a:hover {
      color: white;
    }
    @media (max-width: 768px) {
      .hero-title {
        font-size: 1.9rem;
      }
      .navbar-nav {
        background: white;
        padding: 1rem;
        border-radius: 12px;
      }
      section {
        padding: 2.8rem 0;
      }
    }