/* roulang page: index */
:root {
      --bg-deep: #0A0E17;
      --card-bg: #141B24;
      --card-hover: #1A2432;
      --neon-green: #00F0A8;
      --alert-red: #FF3C38;
      --text-primary: #F0F3F8;
      --text-secondary: #B0B8C1;
      --text-weak: #6B7280;
      --border-subtle: rgba(255, 255, 255, 0.06);
      --border-active: rgba(0, 240, 168, 0.35);
      --glow-green: 0 0 20px rgba(0, 240, 168, 0.15);
      --glow-red: 0 0 16px rgba(255, 60, 56, 0.3);
      --radius-card: 12px;
      --radius-btn: 40px;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      --font-mono: 'SF Mono', 'Consolas', 'Monaco', monospace;
      --container-max: 1280px;
      --nav-height: 72px;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    html {
      scroll-behavior: smooth;
      background-color: var(--bg-deep);
    }
    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;
      overflow-x: hidden;
    }
    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    img {
      max-width: 100%;
      display: block;
      height: auto;
    }
    button, .btn {
      cursor: pointer;
      font-family: var(--font-sans);
      border: none;
      background: none;
      transition: all 0.25s ease;
    }
    /* 导航栏 - 桌面玻璃态 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(10, 14, 23, 0.8);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border-subtle);
      height: var(--nav-height);
      display: flex;
      align-items: center;
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }
    .logo {
      font-size: 1.8rem;
      font-weight: 700;
      letter-spacing: 1px;
      color: var(--neon-green);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .logo span {
      color: var(--text-primary);
      font-weight: 400;
      font-size: 1rem;
      margin-left: 6px;
      letter-spacing: 0.5px;
    }
    .nav-menu {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    .nav-link {
      color: var(--text-secondary);
      font-weight: 500;
      font-size: 0.95rem;
      position: relative;
      padding: 8px 0;
      transition: color 0.2s;
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--neon-green);
      box-shadow: 0 0 12px var(--neon-green);
      transition: width 0.25s ease;
    }
    .nav-link:hover {
      color: var(--neon-green);
    }
    .nav-link:hover::after {
      width: 100%;
    }
    .mobile-nav {
      display: none;
    }
    /* Hero */
    .hero {
      padding: 140px 0 80px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 48px;
      flex-wrap: wrap;
    }
    .hero-left {
      flex: 1 1 480px;
    }
    .hero-right {
      flex: 1 1 400px;
      display: flex;
      justify-content: center;
      position: relative;
    }
    .hero h1 {
      font-size: 3.2rem;
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 20px;
      color: white;
    }
    .hero h1 .highlight {
      color: var(--neon-green);
      text-shadow: 0 0 18px rgba(0,240,168,0.5);
    }
    .hero-sub {
      font-size: 1.15rem;
      color: var(--text-secondary);
      margin-bottom: 36px;
      max-width: 500px;
    }
    .btn-group {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--neon-green);
      color: #0A0E17;
      font-weight: 700;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-size: 1rem;
      letter-spacing: 0.8px;
      box-shadow: 0 4px 18px rgba(0,240,168,0.35);
    }
    .btn-primary:hover {
      background: #33FFBF;
      box-shadow: 0 0 28px rgba(0,240,168,0.6);
    }
    .btn-outline {
      border: 1.5px solid var(--neon-green);
      color: var(--neon-green);
      background: transparent;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-weight: 600;
    }
    .btn-outline:hover {
      background: rgba(0,240,168,0.08);
    }
    .data-cards-stack {
      position: relative;
      width: 100%;
      max-width: 360px;
      height: 280px;
    }
    .stack-card {
      background: rgba(20, 27, 36, 0.9);
      backdrop-filter: blur(8px);
      border: 1px solid var(--border-subtle);
      border-radius: 16px;
      padding: 20px;
      position: absolute;
      width: 100%;
      box-shadow: var(--glow-green);
    }
    .stack-card:nth-child(1) { top: 0; right: 0; z-index: 3; }
    .stack-card:nth-child(2) { top: 20px; right: 16px; z-index: 2; opacity: 0.9; }
    .stack-card:nth-child(3) { top: 40px; right: 32px; z-index: 1; opacity: 0.8; }
    .live-dot {
      display: inline-block;
      width: 10px;
      height: 10px;
      background: var(--alert-red);
      border-radius: 50%;
      margin-right: 6px;
      box-shadow: 0 0 10px var(--alert-red);
      animation: pulse 1.4s infinite;
    }
    @keyframes pulse { 0% { opacity: 1; } 50% { opacity: 0.4; } 100% { opacity: 1; } }
    .odds-number {
      font-family: var(--font-mono);
      font-size: 2.2rem;
      font-weight: 700;
      color: var(--alert-red);
      text-shadow: var(--glow-red);
    }
    /* 数据看板 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      margin: 60px 0 80px;
    }
    .stat-card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      padding: 28px 20px;
      border: 1px solid var(--border-subtle);
      text-align: center;
    }
    .stat-label {
      color: var(--text-weak);
      font-size: 0.9rem;
      margin-bottom: 12px;
    }
    .stat-value {
      font-family: var(--font-mono);
      font-size: 2.6rem;
      font-weight: 700;
      color: var(--neon-green);
    }
    /* 服务矩阵 */
    .section-title {
      font-size: 2.4rem;
      font-weight: 700;
      margin-bottom: 48px;
      position: relative;
      display: inline-block;
    }
    .section-title::after {
      content: '';
      position: absolute;
      bottom: -8px;
      left: 0;
      width: 60px;
      height: 4px;
      background: var(--neon-green);
      box-shadow: 0 0 15px var(--neon-green);
    }
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
      margin: 50px 0;
    }
    .feature-card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      padding: 32px 24px;
      border: 1px solid var(--border-subtle);
      transition: all 0.3s;
    }
    .feature-card:hover {
      border-color: var(--neon-green);
      background: var(--card-hover);
      box-shadow: var(--glow-green);
    }
    .icon-circle {
      width: 56px;
      height: 56px;
      background: rgba(0,240,168,0.12);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      color: var(--neon-green);
    }
    .feature-data {
      font-family: var(--font-mono);
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--neon-green);
      margin: 12px 0 8px;
    }
    /* 对比区 */
    .compare-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      margin: 50px 0;
    }
    .compare-col {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      padding: 32px;
      border: 1px solid var(--border-subtle);
    }
    .compare-col.raybet {
      border-left: 4px solid var(--neon-green);
      background: #111B26;
    }
    .compare-item {
      display: flex;
      justify-content: space-between;
      padding: 16px 0;
      border-bottom: 1px solid var(--border-subtle);
    }
    .check-green {
      color: var(--neon-green);
      font-weight: bold;
    }
    .cross-gray {
      color: #5A626A;
    }
    /* FAQ */
    .faq-item {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      margin-bottom: 16px;
      border-left: 4px solid var(--neon-green);
      overflow: hidden;
    }
    .faq-question {
      padding: 20px 28px;
      font-weight: 700;
      font-size: 1.1rem;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
    }
    .faq-answer {
      padding: 0 28px 20px;
      color: var(--text-secondary);
      display: none;
    }
    .faq-item.open .faq-answer {
      display: block;
    }
    /* CTA */
    .cta-band {
      background: radial-gradient(circle at 30% 30%, rgba(0,240,168,0.08) 0%, #0A0E17 80%);
      border-radius: 28px;
      padding: 70px 40px;
      text-align: center;
      margin: 70px 0;
      border: 1px solid var(--border-subtle);
    }
    .trust-badges {
      display: flex;
      justify-content: center;
      gap: 40px;
      margin: 30px 0;
      color: var(--neon-green);
    }
    /* Footer */
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.2fr;
      gap: 40px;
      padding: 60px 0 40px;
      border-top: 1px solid var(--border-subtle);
      color: var(--text-secondary);
    }
    @media (max-width: 1024px) {
      .features-grid { grid-template-columns: repeat(2,1fr); }
      .stats-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 768px) {
      .navbar { display: none; }
      .mobile-nav {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        background: #141B24;
        justify-content: space-around;
        padding: 12px 8px;
        z-index: 1000;
        border-top: 1px solid var(--border-subtle);
        backdrop-filter: blur(10px);
      }
      .mobile-nav a {
        color: #B0B8C1;
        font-size: 0.8rem;
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 4px;
      }
      .mobile-nav a.active { color: var(--neon-green); }
      .hero { flex-direction: column; padding-top: 40px; }
      .hero h1 { font-size: 2.3rem; }
      .stats-grid { grid-template-columns: 1fr 1fr; }
      .features-grid { grid-template-columns: 1fr; }
      .compare-wrapper { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }