/* roulang page: index */
:root {
      --deep-space: #0A1929;
      --neon-green: #00E676;
      --soft-bg: #F5F7FA;
      --card-bg: rgba(255,255,255,0.85);
      --text-primary: #0A1929;
      --text-secondary: #1E293B;
      --text-muted: #64748B;
      --border-light: rgba(10,25,41,0.08);
      --radius-card: 16px;
      --radius-btn: 30px;
      --shadow-sm: 0 8px 20px rgba(10,25,41,0.06);
      --shadow-md: 0 12px 30px rgba(10,25,41,0.10);
      --transition: 0.25s cubic-bezier(0.2, 0.0, 0, 1.0);
    }
    * { margin:0; padding:0; box-sizing:border-box; }
    body {
      font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
      background-color: var(--soft-bg);
      color: var(--text-primary);
      line-height: 1.7;
      overflow-x: hidden;
    }
    .container { max-width: 1280px; margin: 0 auto; padding: 0 28px; }
    h1, h2, h3 { font-weight: 700; letter-spacing: -0.3px; }
    a { text-decoration: none; color: inherit; transition: var(--transition); }
    img { max-width: 100%; display: block; }

    /* 导航 */
    .navbar {
      position: fixed; top:0; left:0; width:100%; height:72px;
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      box-shadow: 0 4px 12px rgba(0,0,0,0.03);
      z-index: 999;
      display: flex; align-items: center; justify-content: center;
    }
    .nav-container {
      display: flex; align-items: center; justify-content: space-between;
      width: 100%; max-width: 1280px; padding: 0 28px;
    }
    .logo {
      display: flex; align-items: center; gap: 6px;
      font-size: 1.8rem; font-weight: 700; color: var(--deep-space);
      background: linear-gradient(135deg, #0A1929 0%, #173457 100%);
      -webkit-background-clip: text; -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .logo i { font-size: 2rem; color: var(--neon-green); background: transparent; -webkit-text-fill-color: var(--neon-green); }
    .nav-menu { display: flex; gap: 32px; align-items: center; }
    .nav-link { font-size: 0.95rem; font-weight: 500; color: var(--text-secondary); position: relative; padding: 4px 0; }
    .nav-link::after { content:''; position: absolute; bottom:0; left:0; width:0; height:2px; background: var(--neon-green); transition: var(--transition); }
    .nav-link:hover::after, .nav-link.active::after { width:100%; }
    .nav-cta {
      background: var(--neon-green); color: var(--deep-space); font-weight: 700;
      padding: 10px 24px; border-radius: var(--radius-btn);
      box-shadow: 0 4px 12px rgba(0,230,118,0.25);
      margin-left: 20px;
    }
    .nav-cta:hover { box-shadow: 0 0 25px rgba(0,230,118,0.55); transform: scale(1.03); }
    .menu-toggle { display: none; background: none; border: none; font-size: 1.6rem; color: var(--deep-space); cursor: pointer; }

    /* 版块通用 */
    section { padding: 90px 0; position: relative; }
    .section-title { font-size: 2.2rem; margin-bottom: 16px; color: var(--deep-space); }
    .section-sub { color: var(--text-muted); max-width: 680px; margin-bottom: 48px; font-size: 1.1rem; }

    /* Hero */
    .hero {
      padding: 120px 0 60px; min-height: 100vh; display: flex; align-items: center;
      background: radial-gradient(circle at 30% 20%, #1a2f44, #0A1929 70%);
      position: relative; overflow: hidden;
    }
    .hero::before { content:''; position: absolute; top:0; left:0; width:100%; height:100%; background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat; opacity: 0.15; mix-blend-mode: overlay; }
    .hero-content { position: relative; z-index: 2; display: flex; align-items: center; gap: 48px; flex-wrap: wrap; }
    .hero-left { flex:1 1 500px; }
    .hero-title {
      font-size: 3.6rem; font-weight: 800; color: white; line-height: 1.3;
      text-shadow: 0 12px 32px rgba(0,0,0,0.6);
    }
    .dynamic-text { color: var(--neon-green); border-right: 2px solid var(--neon-green); padding-right: 6px; }
    .hero-desc { color: rgba(255,255,255,0.8); font-size: 1.2rem; margin: 24px 0 32px; }
    .button-group { display: flex; gap: 16px; flex-wrap: wrap; }
    .btn-primary {
      background: var(--neon-green); color: #0A1929; font-weight: 700; padding: 14px 36px;
      border-radius: var(--radius-btn); border: none; font-size: 1rem; cursor: pointer;
      transition: var(--transition); box-shadow: 0 4px 20px rgba(0,230,118,0.45);
    }
    .btn-primary:hover { box-shadow: 0 0 30px rgba(0,230,118,0.7); transform: translateY(-2px) scale(1.02); }
    .btn-outline {
      background: transparent; border: 1.5px solid white; color: white; font-weight: 600;
      padding: 14px 36px; border-radius: var(--radius-btn); transition: var(--transition);
    }
    .btn-outline:hover { background: white; color: #0A1929; }
    .hero-card {
      background: var(--card-bg); backdrop-filter: blur(14px); border-radius: var(--radius-card);
      padding: 28px; box-shadow: 0 20px 40px rgba(0,0,0,0.3); color: #0A1929; min-width: 280px;
      flex: 0 0 300px; border: 1px solid rgba(255,255,255,0.3);
    }
    .live-badge { background: #ff0033; color: white; font-size: 0.8rem; padding: 2px 10px; border-radius: 20px; display: inline-block; }
    .score-row { display: flex; justify-content: space-between; margin: 16px 0; font-size: 1.8rem; font-weight: 700; }

    /* 服务卡片 */
    .services-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 28px; }
    .service-card {
      background: white; border-radius: var(--radius-card); padding: 32px 24px;
      box-shadow: var(--shadow-sm); transition: var(--transition); text-align: center;
    }
    .service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
    .icon-circle {
      width: 70px; height: 70px; background: rgba(0,230,118,0.12); border-radius: 50%;
      display: flex; align-items: center; justify-content: center; margin: 0 auto 20px; font-size: 2rem; color: var(--neon-green);
    }

    /* 数据条 */
    .stats-band {
      background: var(--deep-space); padding: 50px 0; color: white; text-align: center;
    }
    .stats-grid { display: flex; justify-content: space-around; flex-wrap: wrap; gap: 32px; }
    .stat-number { font-size: 3rem; font-weight: 800; color: var(--neon-green); }

    /* 赛事卡片 */
    .event-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 28px; }
    .event-card {
      background: white; border-radius: var(--radius-card); overflow: hidden; box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .event-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
    .event-img { height: 200px; background-size: cover; background-position: center; }

    /* 观赛方案 */
    .scheme-block { display: flex; gap: 48px; align-items: center; margin-bottom: 64px; flex-wrap: wrap; }
    .scheme-img img { border-radius: 24px; box-shadow: 0 20px 40px rgba(0,0,0,0.1); }

    /* FAQ */
    .faq-item {
      border-bottom: 1px solid #e2e8f0; padding: 20px 0; cursor: pointer;
    }
    .faq-question { display: flex; justify-content: space-between; font-weight: 600; font-size: 1.1rem; }
    .faq-answer { max-height:0; overflow: hidden; transition: max-height 0.4s ease; color: var(--text-muted); margin-top: 12px; }
    .faq-item.active .faq-answer { max-height: 200px; }
    .faq-item.active i { transform: rotate(45deg); transition: 0.2s; }

    /* CTA */
    .cta-dark {
      background: var(--deep-space); border-radius: 32px; padding: 64px 40px;
      text-align: center; color: white; margin: 70px 28px;
      background-image: url('/assets/images/backpic/back-2.webp');
      background-size: cover; background-blend-mode: overlay;
    }

    /* Footer */
    .footer { background: #0b1a2b; color: #94A3B8; padding: 60px 0 25px; }
    .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 30px; }

    @media (max-width: 1024px) {
      .hero-content { flex-direction: column; }
      .event-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 768px) {
      .nav-menu { display: none; }
      .menu-toggle { display: block; }
      .hero-title { font-size: 2.4rem; }
      .services-grid, .event-grid, .footer-grid { grid-template-columns: 1fr; }
      .stats-grid { flex-direction: column; }
    }