/* roulang page: index */
@import url('/assets/css/vendor/c54648ebdb-css2.css');

    :root {
      --deep-bg: #0A0E27;
      --card-bg: rgba(15, 20, 45, 0.7);
      --glass-border: rgba(0, 240, 255, 0.2);
      --glow-cyan: #00F0FF;
      --energy-purple: #7B2FFF;
      --text-primary: #FFFFFF;
      --text-secondary: #B0C4DE;
      --text-muted: #8892B0;
      --radius-lg: 16px;
      --radius-btn: 30px;
      --shadow-glow: 0 0 24px rgba(0, 240, 255, 0.3);
      --transition-base: all 0.3s ease;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      font-family: 'Inter', 'SF Pro Display', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      background-color: var(--deep-bg);
      color: var(--text-secondary);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      background-image: 
        linear-gradient(rgba(0, 240, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 240, 255, 0.03) 1px, transparent 1px);
      background-size: 40px 40px;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 玻璃拟态卡片 */
    .glass-card {
      background: var(--card-bg);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-lg);
      box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
      transition: var(--transition-base);
    }

    .glass-card:hover {
      border-color: rgba(0, 240, 255, 0.6);
      box-shadow: var(--shadow-glow);
      transform: translateY(-4px);
    }

    /* 发光按钮 */
    .btn-primary {
      background: linear-gradient(135deg, var(--glow-cyan), var(--energy-purple));
      color: white;
      font-weight: 600;
      border: none;
      border-radius: var(--radius-btn);
      padding: 14px 36px;
      cursor: pointer;
      transition: var(--transition-base);
      box-shadow: 0 4px 20px rgba(0, 240, 255, 0.4);
      letter-spacing: 0.5px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
    }

    .btn-primary:hover {
      filter: brightness(1.2);
      box-shadow: 0 0 30px rgba(0, 240, 255, 0.6);
      transform: translateY(-2px);
      animation: pulse-glow 1.5s infinite;
    }

    .btn-outline {
      background: transparent;
      border: 1px solid var(--glow-cyan);
      color: var(--glow-cyan);
      font-weight: 600;
      border-radius: var(--radius-btn);
      padding: 14px 36px;
      cursor: pointer;
      transition: var(--transition-base);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
    }

    .btn-outline:hover {
      background: rgba(0, 240, 255, 0.15);
      border-color: var(--energy-purple);
      color: white;
      box-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
    }

    @keyframes pulse-glow {
      0% { box-shadow: 0 0 10px rgba(0, 240, 255, 0.4); }
      50% { box-shadow: 0 0 28px rgba(0, 240, 255, 0.7); }
      100% { box-shadow: 0 0 10px rgba(0, 240, 255, 0.4); }
    }

    @keyframes gradient-shift {
      0% { background-position: 0% 50%; }
      50% { background-position: 100% 50%; }
      100% { background-position: 0% 50%; }
    }

    @keyframes float-particle {
      0% { transform: translateY(0px) scale(1); opacity: 0.4; }
      50% { transform: translateY(-20px) scale(1.2); opacity: 0.7; }
      100% { transform: translateY(0px) scale(1); opacity: 0.4; }
    }

    .particle {
      position: absolute;
      background: var(--glow-cyan);
      border-radius: 50%;
      filter: blur(2px);
      animation: float-particle 6s infinite ease-in-out;
    }

    /* 导航栏 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 72px;
      background: rgba(10, 14, 39, 0.8);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(0, 240, 255, 0.15);
      z-index: 1000;
      transition: var(--transition-base);
    }

    .nav-link {
      color: var(--text-secondary);
      font-weight: 500;
      padding: 8px 16px;
      border-radius: 20px;
      transition: var(--transition-base);
      position: relative;
    }

    .nav-link:hover, .nav-link.active {
      color: var(--glow-cyan);
      text-shadow: 0 0 10px rgba(0, 240, 255, 0.5);
    }

    .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 20px;
      height: 2px;
      background: var(--glow-cyan);
      box-shadow: 0 0 8px var(--glow-cyan);
    }

    /* 移动端菜单 */
    .mobile-menu {
      background: rgba(10, 14, 39, 0.95);
      backdrop-filter: blur(20px);
    }

    /* 数字滚动动画 */
    @property --num {
      syntax: '<integer>';
      initial-value: 0;
      inherits: false;
    }

    .count-up {
      animation: counter 3s ease-out forwards;
      counter-reset: num var(--num);
    }

    @keyframes counter {
      from { --num: 0; }
      to { --num: var(--target); }
    }

    .count-up::after {
      content: counter(num);
    }

    /* 手风琴 */
    details summary {
      list-style: none;
      cursor: pointer;
      font-weight: 600;
      font-size: 1.125rem;
      color: white;
      padding: 20px 0;
      border-bottom: 1px solid rgba(0, 240, 255, 0.2);
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    details summary::-webkit-details-marker {
      display: none;
    }

    details[open] summary {
      color: var(--glow-cyan);
    }

    details .faq-answer {
      padding: 16px 0 24px;
      color: var(--text-secondary);
    }

    /* 响应式补充 */
    @media (max-width: 768px) {
      .container {
        padding: 0 16px;
      }
      .navbar .desktop-nav {
        display: none;
      }
      .mobile-nav-trigger {
        display: block;
      }
    }

    @media (min-width: 769px) {
      .mobile-nav-trigger, .mobile-menu {
        display: none;
      }
    }