/* roulang page: index */
:root {
      --deep: #0A0E27;
      --electric: #7C3AED;
      --neon: #00F5D4;
      --text-primary: #F8FAFC;
      --text-secondary: #E2E8F0;
      --text-muted: #94A3B8;
      --glass-bg: rgba(255, 255, 255, 0.03);
      --glass-border: rgba(255, 255, 255, 0.06);
      --glow-neon: 0 0 24px rgba(0, 245, 212, 0.5);
      --glow-electric: 0 8px 32px rgba(124, 58, 237, 0.3);
      --radius-card: 16px;
      --radius-btn: 12px;
    }

    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      background: radial-gradient(circle at 30% 10%, #1a1035 0%, #0A0E27 60%);
      background-color: #0A0E27;
      color: #E2E8F0;
      line-height: 1.8;
      -webkit-font-smoothing: antialiased;
      scroll-behavior: smooth;
    }

    /* 网格暗纹背景 */
    .bg-grid {
      background-image: 
        linear-gradient(rgba(124, 58, 237, 0.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(124, 58, 237, 0.08) 1px, transparent 1px);
      background-size: 60px 60px;
    }

    /* 浮动Dock导航 */
    .dock-nav {
      background: rgba(10, 14, 39, 0.75);
      backdrop-filter: blur(24px);
      -webkit-backdrop-filter: blur(24px);
      border: 1px solid rgba(255, 255, 255, 0.06);
      border-radius: 9999px;
      box-shadow: 0 12px 40px rgba(0, 0, 0, 0.6);
    }

    /* 玻璃拟态卡片 */
    .glass-card {
      background: rgba(255, 255, 255, 0.03);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-card);
      box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
      transition: all 0.3s ease;
    }
    .glass-card:hover {
      border-color: rgba(0, 245, 212, 0.4);
      box-shadow: 0 16px 40px rgba(0, 245, 212, 0.15), 0 0 20px rgba(124, 58, 237, 0.2);
      transform: translateY(-4px);
    }

    /* 主CTA按钮 */
    .btn-primary {
      background: #00F5D4;
      color: #0A0E27;
      font-weight: 700;
      border-radius: var(--radius-btn);
      padding: 14px 32px;
      box-shadow: 0 0 28px rgba(0, 245, 212, 0.55);
      transition: all 0.25s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      letter-spacing: 0.02em;
    }
    .btn-primary:hover {
      box-shadow: 0 0 45px rgba(0, 245, 212, 0.8);
      transform: scale(1.03);
      background: #14F7B6;
    }

    .btn-outline {
      border: 1.5px solid rgba(255, 255, 255, 0.3);
      background: transparent;
      color: #F8FAFC;
      font-weight: 600;
      border-radius: var(--radius-btn);
      padding: 12px 28px;
      transition: all 0.25s;
    }
    .btn-outline:hover {
      border-color: #00F5D4;
      background: rgba(0, 245, 212, 0.08);
      color: #00F5D4;
    }

    /* 图标装饰 */
    .icon-glow-purple {
      color: #8B5CF6;
      filter: drop-shadow(0 0 8px rgba(139, 92, 246, 0.7));
    }
    .icon-glow-neon {
      color: #00F5D4;
      filter: drop-shadow(0 0 8px rgba(0, 245, 212, 0.7));
    }

    /* FAQ 手风琴 */
    .faq-item {
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }
    .faq-question {
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 20px 0;
      font-weight: 600;
      color: #F8FAFC;
      transition: color 0.2s;
    }
    .faq-question:hover {
      color: #00F5D4;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease, padding 0.4s ease;
      color: #CBD5E1;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding-bottom: 20px;
    }
    .faq-icon {
      font-size: 1.5rem;
      font-weight: 300;
      color: #00F5D4;
      transition: transform 0.3s;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    /* 数字滚动效果 */
    .count-number {
      font-feature-settings: "tnum";
      font-variant-numeric: tabular-nums;
      background: linear-gradient(135deg, #00F5D4 0%, #8B5CF6 80%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    @media (max-width: 768px) {
      .dock-nav {
        border-radius: 28px;
        padding-left: 16px;
        padding-right: 16px;
      }
      .mobile-menu {
        display: none;
      }
      .mobile-menu.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 16px;
        right: 16px;
        background: rgba(10, 14, 39, 0.95);
        backdrop-filter: blur(30px);
        border-radius: 24px;
        padding: 20px;
        border: 1px solid rgba(255,255,255,0.1);
        gap: 16px;
        z-index: 50;
      }
    }