/* roulang page: index */
:root {
      --bg-deep: #0B0C10;
      --energy-blue: #00E5FF;
      --energy-blue-hover: #33EAFF;
      --gold: #F0B90B;
      --danger-red: #FF4655;
      --card-bg: #1A1C23;
      --card-border: rgba(0, 229, 255, 0.08);
      --card-hover-glow: rgba(0, 229, 255, 0.15);
      --text-primary: #FFFFFF;
      --text-secondary: #B0B3C1;
      --text-muted: #8A8D9C;
      --radius-card: 8px;
      --radius-btn: 4px;
      --font-mono: 'JetBrains Mono', 'Roboto Mono', 'Courier New', monospace;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      --spacing-section: 80px;
      --transition-fast: 0.2s ease;
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body {
      background-color: var(--bg-deep);
      font-family: var(--font-sans);
      color: var(--text-primary);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 32px;
    }

    /* 导航 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: transparent;
      transition: background 0.3s ease, backdrop-filter 0.3s ease;
      border-bottom: 1px solid transparent;
    }

    .site-header.scrolled {
      background: rgba(11, 12, 16, 0.95);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--energy-blue);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .logo {
      font-size: 22px;
      font-weight: 700;
      letter-spacing: 2px;
      color: var(--text-primary);
      text-decoration: none;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .logo i {
      color: var(--energy-blue);
      font-size: 26px;
    }

    .nav-links {
      display: flex;
      gap: 28px;
      align-items: center;
    }

    .nav-links a {
      color: var(--text-secondary);
      text-decoration: none;
      font-size: 15px;
      font-weight: 500;
      transition: color 0.2s;
      position: relative;
      padding: 4px 0;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--energy-blue);
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--energy-blue);
      transition: width 0.2s;
    }

    .nav-links a:hover::after {
      width: 100%;
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      color: var(--text-primary);
      font-size: 24px;
      cursor: pointer;
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .menu-toggle {
        display: block;
      }
      .mobile-menu {
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        background: rgba(11, 12, 16, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 32px;
        gap: 24px;
        display: none;
        z-index: 999;
      }
      .mobile-menu.open {
        display: flex;
      }
      .mobile-menu a {
        font-size: 18px;
        color: var(--text-primary);
        border-left: 3px solid var(--energy-blue);
        padding-left: 16px;
      }
    }

    /* 区块通用 */
    section {
      padding: var(--spacing-section) 0;
    }

    h2 {
      font-size: 28px;
      font-weight: 700;
      margin-bottom: 16px;
      letter-spacing: 1px;
      color: var(--text-primary);
    }

    .section-sub {
      color: var(--text-secondary);
      font-size: 16px;
      margin-bottom: 48px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 15px;
      transition: all var(--transition-fast);
      cursor: pointer;
      text-decoration: none;
      border: 1px solid transparent;
    }

    .btn-primary {
      background: var(--energy-blue);
      color: #0B0C10;
      border: none;
    }

    .btn-primary:hover {
      background: var(--energy-blue-hover);
      box-shadow: 0 0 18px rgba(0, 229, 255, 0.4);
    }

    .btn-outline {
      background: transparent;
      border: 1px solid var(--energy-blue);
      color: var(--energy-blue);
    }

    .btn-outline:hover {
      border-color: var(--gold);
      color: var(--gold);
    }

    .btn-ghost {
      background: transparent;
      color: var(--energy-blue);
      padding: 8px 0;
      font-weight: 500;
    }

    .btn-ghost i {
      margin-left: 6px;
      transition: transform 0.2s;
    }

    .btn-ghost:hover i {
      transform: translateX(4px);
    }

    /* Hero */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      background-blend-mode: overlay;
      background-color: rgba(11, 12, 16, 0.85);
      position: relative;
      padding-top: 100px;
    }

    .hero-content {
      display: flex;
      align-items: center;
      gap: 60px;
      flex-wrap: wrap;
    }

    .hero-text {
      flex: 1 1 400px;
    }

    .hero h1 {
      font-size: 42px;
      font-weight: 700;
      line-height: 1.2;
      letter-spacing: 2px;
      margin-bottom: 20px;
    }

    .hero h1 span {
      color: var(--energy-blue);
    }

    .hero p {
      color: var(--text-secondary);
      font-size: 18px;
      margin-bottom: 32px;
    }

    .live-card {
      background: #1E2028;
      border: 1px solid rgba(0,229,255,0.15);
      border-radius: var(--radius-card);
      padding: 24px;
      width: 320px;
      box-shadow: 0 0 25px rgba(0,229,255,0.1);
      animation: pulseGlow 2s infinite;
    }

    @keyframes pulseGlow {
      0% { box-shadow: 0 0 10px rgba(0,229,255,0.1); }
      50% { box-shadow: 0 0 30px rgba(0,229,255,0.25); }
      100% { box-shadow: 0 0 10px rgba(0,229,255,0.1); }
    }

    .live-badge {
      background: var(--danger-red);
      color: white;
      font-weight: 700;
      font-size: 12px;
      padding: 4px 10px;
      border-radius: 4px;
      display: inline-block;
      margin-bottom: 16px;
    }

    .team-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin: 12px 0;
    }

    .score {
      font-family: var(--font-mono);
      font-size: 32px;
      font-weight: 700;
      color: var(--gold);
    }

    /* 卡片通用 */
    .card {
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-card);
      padding: 28px 24px;
      transition: all var(--transition-fast);
    }

    .card:hover {
      border-color: var(--energy-blue);
      box-shadow: 0 0 20px var(--card-hover-glow);
      background: #22242E;
    }

    .grid-4, .grid-3, .grid-2 {
      display: grid;
      gap: 24px;
    }

    .grid-4 { grid-template-columns: repeat(4, 1fr); }
    .grid-3 { grid-template-columns: repeat(3, 1fr); }
    .grid-2 { grid-template-columns: repeat(2, 1fr); }

    @media (max-width: 1024px) {
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
    }

    @media (max-width: 640px) {
      .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
      .container { padding: 0 20px; }
      .hero h1 { font-size: 32px; }
    }

    .stat-number {
      font-family: var(--font-mono);
      font-size: 48px;
      font-weight: 700;
      color: var(--energy-blue);
    }

    .faq-item {
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }

    .faq-question {
      background: none;
      border: none;
      width: 100%;
      text-align: left;
      padding: 20px 0;
      font-size: 16px;
      font-weight: 600;
      color: white;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background: #1A1C23;
      padding: 0 16px;
      color: var(--text-secondary);
    }

    .faq-answer.open {
      max-height: 200px;
      padding: 16px;
    }

    .cta-banner {
      background: linear-gradient(135deg, #0B0C10 0%, #1A1C23 100%);
      border: 1px solid var(--energy-blue);
      border-radius: var(--radius-card);
      padding: 48px;
      text-align: center;
    }

    footer {
      background: #06070A;
      padding: 60px 0 30px;
    }