/* roulang page: index */
:root {
      --bg-deep: #0A0E27;
      --bg-card: #141B33;
      --border-mid: #1F2847;
      --accent-cyan: #00F0FF;
      --warning-red: #FF4655;
      --text-primary: #E8ECF1;
      --text-secondary: #8892B0;
      --white: #ffffff;
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-capsule: 30px;
      --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.4);
      --shadow-btn-glow: 0 0 16px rgba(0, 240, 255, 0.5);
      --font-sans: "Inter", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      --transition: all 0.25s ease;
    }

    * {
      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: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

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

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

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

    button, .btn {
      cursor: pointer;
      font-family: inherit;
      border: none;
      background: none;
      transition: var(--transition);
    }

    input {
      font-family: inherit;
      outline: none;
    }

    /* 导航 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 64px;
      background: rgba(10, 14, 39, 0.85);
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-mid);
      z-index: 50;
      display: flex;
      align-items: center;
      padding: 0 32px;
    }

    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      font-size: 1.4rem;
      color: var(--white);
    }
    .logo i {
      color: var(--accent-cyan);
      font-size: 1.8rem;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
      list-style: none;
    }

    .nav-links a {
      font-weight: 500;
      color: var(--text-secondary);
      font-size: 0.95rem;
      position: relative;
    }

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

    .nav-cta {
      background: var(--accent-cyan);
      color: var(--bg-deep);
      font-weight: 700;
      padding: 10px 24px;
      border-radius: var(--radius-capsule);
      font-size: 0.9rem;
      letter-spacing: 0.3px;
    }
    .nav-cta:hover {
      box-shadow: var(--shadow-btn-glow);
      background: #33f5ff;
    }

    .mobile-nav {
      display: none;
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: #0A0E27;
      border-top: 1px solid var(--border-mid);
      justify-content: space-around;
      align-items: center;
      height: 60px;
      z-index: 55;
    }
    .mobile-nav a {
      display: flex;
      flex-direction: column;
      align-items: center;
      font-size: 0.7rem;
      color: var(--text-secondary);
      gap: 4px;
    }
    .mobile-nav a i {
      font-size: 1.3rem;
    }
    .mobile-nav a.active {
      color: var(--accent-cyan);
    }

    /* 板块通用 */
    section {
      padding: 100px 0;
    }
    h2 {
      font-size: 2rem;
      font-weight: 800;
      margin-bottom: 16px;
      letter-spacing: -0.3px;
      color: var(--white);
    }
    .section-sub {
      color: var(--text-secondary);
      margin-bottom: 48px;
      font-size: 1.1rem;
    }

    /* Hero */
    .hero {
      padding-top: 140px;
      padding-bottom: 100px;
      background: linear-gradient(135deg, #0A0E27 0%, #0d1335 100%);
      position: relative;
      overflow: hidden;
    }
    .hero-grid {
      display: flex;
      gap: 48px;
      align-items: center;
      flex-wrap: wrap;
    }
    .hero-left {
      flex: 1 1 45%;
    }
    .hero-left h1 {
      font-size: 3.2rem;
      font-weight: 900;
      line-height: 1.2;
      margin-bottom: 20px;
      color: var(--white);
    }
    .hero-left .highlight {
      color: var(--accent-cyan);
    }
    .hero-sub {
      font-size: 1.2rem;
      color: var(--text-secondary);
      margin-bottom: 32px;
    }
    .hero-btns {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--accent-cyan);
      color: #0A0E27;
      font-weight: 700;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-size: 1rem;
    }
    .btn-primary:hover {
      box-shadow: var(--shadow-btn-glow);
    }
    .btn-outline {
      background: transparent;
      border: 1px solid var(--accent-cyan);
      color: var(--accent-cyan);
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
    }
    .btn-outline:hover {
      background: rgba(0,240,255,0.08);
    }

    .hero-right {
      flex: 1 1 40%;
      display: flex;
      justify-content: center;
    }
    .live-card {
      background: var(--bg-card);
      border: 1px solid var(--border-mid);
      border-radius: 20px;
      padding: 24px;
      width: 320px;
      box-shadow: var(--shadow-card);
      animation: pulseGlow 2s infinite;
    }
    @keyframes pulseGlow {
      0% { box-shadow: 0 0 0 0 rgba(0,240,255,0.2); }
      70% { box-shadow: 0 0 0 12px rgba(0,240,255,0); }
      100% { box-shadow: 0 0 0 0 rgba(0,240,255,0); }
    }
    .teams-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 16px;
    }
    .team {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 8px;
    }
    .badge-live {
      background: var(--warning-red);
      color: white;
      font-size: 0.7rem;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: 20px;
    }
    .score {
      font-size: 2.5rem;
      font-weight: 800;
      color: var(--accent-cyan);
    }

    /* 亮点网格 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-mid);
      border-radius: var(--radius-card);
      padding: 32px 24px;
      transition: var(--transition);
    }
    .feature-card:hover {
      border-color: var(--accent-cyan);
      transform: translateY(-4px);
      box-shadow: var(--shadow-card);
    }
    .feature-icon {
      font-size: 2rem;
      color: var(--accent-cyan);
      margin-bottom: 16px;
    }

    /* 瀑布流赛事 */
    .matches-waterfall {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
      gap: 24px;
    }
    .match-card {
      background: var(--bg-card);
      border: 1px solid var(--border-mid);
      border-radius: var(--radius-card);
      padding: 20px;
      transition: var(--transition);
    }
    .match-card:hover {
      border-color: var(--accent-cyan);
      transform: translateY(-3px);
    }
    .match-score {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--accent-cyan);
    }

    /* 对比表 */
    .compare-table {
      display: flex;
      gap: 0;
      border-radius: 16px;
      overflow: hidden;
      border: 1px solid var(--border-mid);
    }
    .plan-col {
      flex: 1;
      padding: 40px 24px;
      background: #0f142a;
    }
    .plan-col.premium {
      background: #141b38;
      border-left: 2px solid var(--accent-cyan);
    }

    /* FAQ */
    .faq-item {
      border-bottom: 1px solid var(--border-mid);
      padding: 20px 0;
    }
    .faq-question {
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
    }
    .faq-answer {
      color: var(--text-secondary);
      margin-top: 12px;
      display: none;
    }
    .faq-item.open .faq-answer {
      display: block;
    }

    /* CTA横幅 */
    .cta-banner {
      background: linear-gradient(135deg, #0A0E27 0%, #1a2342 100%);
      padding: 80px 0;
      text-align: center;
    }
    .subscribe-form {
      display: flex;
      max-width: 480px;
      margin: 24px auto 0;
    }
    .subscribe-form input {
      flex:1;
      background: #141B33;
      border:1px solid #1F2847;
      padding: 14px 20px;
      border-radius: 8px 0 0 8px;
      color: white;
    }
    .subscribe-form button {
      background: var(--accent-cyan);
      color: #0A0E27;
      font-weight: 700;
      padding: 0 28px;
      border-radius: 0 8px 8px 0;
    }

    footer {
      background: #060B1C;
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }

    @media (max-width: 1024px) {
      .hero-grid { flex-direction: column; }
      .features-grid { grid-template-columns: 1fr; }
    }
    @media (max-width: 768px) {
      .navbar .nav-links, .navbar .nav-cta { display: none; }
      .mobile-nav { display: flex; }
      .hero-left h1 { font-size: 2.4rem; }
      .compare-table { flex-direction: column; }
    }