/* roulang page: index */
:root {
      --bg-deep: #0D1117;
      --bg-card: #161B22;
      --border-subtle: #21262D;
      --gold: #C8A951;
      --gold-hover: #D4B65E;
      --red-accent: #E84057;
      --red-hover: #FF4D6A;
      --text-primary: #E6E7E8;
      --text-secondary: #8B949E;
      --green-live: #3FB950;
      --blue-link: #58A6FF;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, 'Segoe UI', sans-serif;
      --font-mono: "DIN Alternate", "Roboto Mono", "Courier New", monospace;
      --shadow-card: 0 4px 12px rgba(0,0,0,0.4);
      --shadow-hover: 0 8px 24px rgba(0,0,0,0.6);
      --border-radius-card: 8px;
      --border-radius-btn: 6px;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-deep);
      color: var(--text-primary);
      line-height: 1.75;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      color: inherit;
      text-decoration: none;
    }
    button, .btn {
      cursor: pointer;
      font-family: inherit;
    }
    section {
      padding: 80px 0;
    }
    /* 导航 */
    .header {
      position: sticky;
      top: 0;
      z-index: 50;
      background-color: var(--bg-deep);
      border-bottom: 1px solid var(--border-subtle);
      backdrop-filter: blur(8px);
    }
    .nav {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 64px;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 1.5rem;
      color: var(--text-primary);
      letter-spacing: -0.5px;
    }
    .logo-icon {
      width: 32px;
      height: 32px;
      background: linear-gradient(135deg, var(--gold) 0%, #8b6914 100%);
      border-radius: 6px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      color: #0D1117;
      font-size: 18px;
    }
    .logo-sub {
      font-size: 0.75rem;
      color: var(--text-secondary);
      font-weight: 400;
      margin-left: 4px;
      display: none;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
    }
    .nav-links a {
      color: var(--text-secondary);
      font-weight: 500;
      transition: color 0.2s;
      font-size: 0.95rem;
    }
    .nav-links a:hover {
      color: var(--text-primary);
    }
    .nav-cta {
      background-color: var(--red-accent);
      color: white;
      padding: 8px 20px;
      border-radius: var(--border-radius-btn);
      font-weight: 600;
      font-size: 0.9rem;
      transition: background 0.2s;
      border: none;
    }
    .nav-cta:hover {
      background-color: var(--red-hover);
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
    }
    .hamburger span {
      width: 24px;
      height: 2px;
      background: var(--text-primary);
      transition: 0.3s;
    }
    @media (max-width: 1024px) {
      .nav-links {
        display: none;
      }
      .hamburger {
        display: flex;
      }
    }
    /* Hero */
    .hero {
      background: radial-gradient(circle at 20% 20%, #1a1f2b 0%, var(--bg-deep) 80%);
      position: relative;
      overflow: hidden;
      padding: 100px 0 80px;
    }
    .hero::before {
      content: "";
      position: absolute;
      top:0;left:0;right:0;bottom:0;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.15;
      pointer-events: none;
    }
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 40px;
      position: relative;
      z-index: 2;
    }
    .hero-text {
      flex: 1;
    }
    .hero h1 {
      font-size: clamp(2.2rem, 5vw, 3.4rem);
      font-weight: 800;
      line-height: 1.2;
      letter-spacing: -0.5px;
      margin-bottom: 1.2rem;
      color: white;
    }
    .hero-sub {
      font-size: 1.15rem;
      color: var(--text-secondary);
      margin-bottom: 2rem;
      max-width: 480px;
    }
    .btn-primary {
      background-color: var(--red-accent);
      color: white;
      padding: 14px 32px;
      border-radius: var(--border-radius-btn);
      font-weight: 700;
      font-size: 1rem;
      display: inline-block;
      transition: all 0.3s;
      border: none;
      box-shadow: 0 4px 12px rgba(232,64,87,0.3);
    }
    .btn-primary:hover {
      background-color: var(--red-hover);
      box-shadow: 0 8px 20px rgba(232,64,87,0.5);
    }
    .hero-visual {
      flex: 1;
      display: flex;
      justify-content: center;
    }
    .score-card {
      background: #1c2128;
      border: 1px solid #2a3039;
      border-radius: 12px;
      padding: 28px 30px;
      font-family: var(--font-mono);
      box-shadow: 0 10px 25px rgba(0,0,0,0.7);
      min-width: 240px;
    }
    .teams {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 1.3rem;
      font-weight: 700;
    }
    .score-big {
      font-size: 3.5rem;
      font-weight: 800;
      color: var(--gold);
      text-align: center;
      margin: 12px 0;
      animation: pulse-glow 2s infinite;
    }
    @keyframes pulse-glow {
      0% { text-shadow: 0 0 8px rgba(200,169,81,0.5); }
      50% { text-shadow: 0 0 18px rgba(200,169,81,0.9); }
      100% { text-shadow: 0 0 8px rgba(200,169,81,0.5); }
    }
    .live-badge {
      color: var(--green-live);
      font-size: 0.9rem;
      display: flex;
      align-items: center;
      gap: 4px;
    }
    @media (max-width: 768px) {
      .hero-grid {
        flex-direction: column;
      }
      .hero-visual {
        width: 100%;
      }
    }
    /* Features */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 24px;
      margin-top: 40px;
    }
    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--border-radius-card);
      padding: 28px 20px;
      transition: all 0.3s;
    }
    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: var(--gold);
    }
    .feature-icon {
      font-size: 2rem;
      color: var(--gold);
      margin-bottom: 16px;
    }
    .feature-card h3 {
      font-size: 1.25rem;
      font-weight: 600;
      margin-bottom: 10px;
    }
    .feature-card p {
      color: var(--text-secondary);
      font-size: 0.95rem;
    }
    @media (max-width: 1024px) {
      .features-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 640px) {
      .features-grid { grid-template-columns: 1fr; }
    }
    /* Advantages */
    .advantages {
      background-color: #11161d;
    }
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 30px;
      margin-top: 40px;
      text-align: center;
    }
    .stat-number {
      font-family: var(--font-mono);
      font-size: 3.2rem;
      font-weight: 800;
      color: var(--gold);
    }
    .stat-label {
      color: var(--text-secondary);
      font-weight: 500;
      margin-top: 8px;
    }
    @media (max-width: 768px) {
      .stats-grid { grid-template-columns: 1fr 1fr; }
    }
    /* Showcase */
    .showcase-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 24px;
      margin-top: 40px;
    }
    .match-card {
      background: #1a2028;
      border-radius: var(--border-radius-card);
      padding: 20px;
      border: 1px solid #2a313c;
      transition: 0.3s;
    }
    .match-card:hover {
      border-color: var(--gold);
      box-shadow: 0 8px 18px rgba(0,0,0,0.7);
    }
    .league-tag {
      display: flex;
      align-items: center;
      gap: 6px;
      font-size: 0.8rem;
      color: var(--text-secondary);
      margin-bottom: 14px;
    }
    .match-teams {
      display: flex;
      justify-content: space-between;
      font-weight: 700;
      margin-bottom: 10px;
    }
    .match-score {
      font-family: var(--font-mono);
      font-size: 2rem;
      color: var(--gold);
      text-align: center;
    }
    @media (max-width: 900px) {
      .showcase-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 600px) {
      .showcase-grid { grid-template-columns: 1fr; }
    }
    /* How it works */
    .steps {
      display: flex;
      justify-content: space-between;
      margin-top: 40px;
      gap: 20px;
    }
    .step {
      flex:1;
      text-align: center;
    }
    .step-num {
      font-size: 2.5rem;
      font-weight: 800;
      color: rgba(200,169,81,0.4);
    }
    @media (max-width: 768px) {
      .steps { flex-direction: column; }
    }
    /* FAQ */
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: 6px;
      margin-bottom: 12px;
      overflow: hidden;
    }
    .faq-question {
      padding: 18px 20px;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
      background: none;
      border: none;
      width: 100%;
      text-align: left;
      color: var(--text-primary);
      font-size: 1rem;
    }
    .faq-answer {
      padding: 0 20px 18px;
      color: var(--text-secondary);
      display: none;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    /* CTA */
    .cta-block {
      background: #0d1016;
      text-align: center;
      padding: 80px 20px;
    }
    .btn-gold {
      background: var(--gold);
      color: #0D1117;
      font-weight: 700;
      padding: 14px 36px;
      border-radius: 6px;
      border: none;
      font-size: 1rem;
    }
    /* Footer */
    .footer {
      background: #0b0f14;
      border-top: 1px solid #242b33;
      padding: 60px 0 30px;
      color: var(--text-secondary);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
    }
    @media (max-width: 768px) {
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }