/* roulang page: index */
:root {
      --primary: #0F172A;
      --accent-cyan: #00E5FF;
      --accent-red: #F43F5E;
      --bg-light: #F8FAFC;
      --card-bg: #FFFFFF;
      --text-gray: #475569;
      --text-light: #64748B;
      --border-light: rgba(15, 23, 42, 0.08);
      --shadow-card: 0 4px 24px rgba(15, 23, 42, 0.06);
      --shadow-hover: 0 8px 32px rgba(15, 23, 42, 0.12);
      --radius-lg: 16px;
      --radius-btn: 12px;
      --transition: 300ms ease;
    }
    * {
      box-sizing: border-box;
    }
    body {
      margin: 0;
      font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Inter", sans-serif;
      background-color: var(--bg-light);
      color: var(--text-gray);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }
    .inter-font {
      font-family: 'Inter', -apple-system, sans-serif;
    }
    .container-custom {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    @media (min-width: 768px) {
      .container-custom {
        padding-left: 48px;
        padding-right: 48px;
      }
    }
    /* 导航模糊效果 */
    .glass-nav {
      background: rgba(248, 250, 252, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-light);
    }
    /* 按钮样式 */
    .btn-primary {
      background-color: var(--accent-cyan);
      color: white;
      border-radius: var(--radius-btn);
      padding: 14px 32px;
      font-weight: 600;
      transition: var(--transition);
      display: inline-block;
      text-align: center;
      box-shadow: 0 4px 12px rgba(0, 229, 255, 0.25);
    }
    .btn-primary:hover {
      filter: brightness(1.1);
      box-shadow: 0 0 20px rgba(0, 229, 255, 0.5);
      transform: translateY(-1px);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--accent-red);
      color: var(--accent-red);
      border-radius: var(--radius-btn);
      padding: 14px 32px;
      font-weight: 600;
      transition: var(--transition);
      display: inline-block;
      text-align: center;
    }
    .btn-outline:hover {
      background-color: var(--accent-red);
      color: white;
      border-color: var(--accent-red);
    }
    .btn-nav-cta {
      background-color: var(--accent-cyan);
      color: white;
      border-radius: 9999px;
      padding: 10px 24px;
      font-weight: 600;
      font-size: 0.9rem;
      transition: var(--transition);
      box-shadow: 0 2px 8px rgba(0, 229, 255, 0.3);
    }
    .btn-nav-cta:hover {
      filter: brightness(1.15);
      box-shadow: 0 0 18px rgba(0, 229, 255, 0.5);
    }
    /* 卡片样式 */
    .card {
      background: var(--card-bg);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-card);
      transition: var(--transition);
    }
    .card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    /* 手风琴动画 */
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding-top: 12px;
      padding-bottom: 12px;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      color: var(--accent-cyan);
    }
    .faq-item.active {
      border-color: var(--accent-cyan);
    }
    /* 动态数字动画占位 */
    @keyframes countPulse {
      0% { opacity: 0.8; transform: scale(1); }
      50% { opacity: 1; transform: scale(1.02); }
      100% { opacity: 0.8; transform: scale(1); }
    }
    .live-number {
      animation: countPulse 2s infinite;
    }
    /* 背景网格纹理 */
    .grid-pattern {
      background-image: 
        linear-gradient(rgba(0, 229, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 229, 255, 0.03) 1px, transparent 1px);
      background-size: 40px 40px;
    }