/* roulang page: index */
:root {
      --primary: #0EA5E9;
      --primary-glow: #38BDF8;
      --secondary: #06B6D4;
      --bg-deep: #0B1120;
      --bg-card: #1E293B;
      --text-main: #FFFFFF;
      --text-body: #CBD5E1;
      --text-muted: #94A3B8;
      --border-light: rgba(255,255,255,0.08);
      --border-glow: rgba(14,165,233,0.5);
      --shadow-card: 0 8px 32px rgba(0,0,0,0.4);
      --glass-bg: rgba(255,255,255,0.03);
      --radius-xl: 16px;
      --radius-full: 9999px;
      --transition-smooth: all 0.3s ease;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
      background-color: var(--bg-deep);
      color: var(--text-body);
      line-height: 1.7;
      margin: 0;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }

    /* 自定义玻璃拟态卡片 */
    .glass-card {
      background: var(--glass-bg);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-xl);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      box-shadow: var(--shadow-card);
      transition: var(--transition-smooth);
    }

    .glass-card:hover {
      border-color: var(--border-glow);
      box-shadow: 0 12px 40px rgba(14,165,233,0.25);
      transform: translateY(-4px);
    }

    /* 发光文字效果 */
    .text-glow {
      text-shadow: 0 0 15px currentColor;
    }

    /* 发光按钮 */
    .btn-glow {
      background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
      color: white;
      border-radius: var(--radius-full);
      box-shadow: 0 0 20px rgba(14,165,233,0.4);
      transition: var(--transition-smooth);
      font-weight: 600;
      padding: 0.75rem 2rem;
      border: none;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      letter-spacing: 0.5px;
    }

    .btn-glow:hover {
      box-shadow: 0 0 30px rgba(14,165,233,0.7);
      filter: brightness(1.1);
      transform: translateY(-2px);
    }

    .btn-ghost {
      background: transparent;
      border: 1px solid var(--primary);
      color: var(--primary);
      border-radius: var(--radius-full);
      transition: var(--transition-smooth);
      font-weight: 600;
      padding: 0.75rem 2rem;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      letter-spacing: 0.5px;
    }

    .btn-ghost:hover {
      background: rgba(14,165,233,0.1);
      box-shadow: 0 0 15px rgba(14,165,233,0.4);
      border-color: var(--primary-glow);
    }

    /* 导航特殊样式 */
    .nav-blur {
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      background: rgba(11, 17, 32, 0.7);
      border-bottom: 1px solid rgba(255,255,255,0.05);
      transition: background 0.4s ease, border-color 0.4s ease;
    }

    .nav-scrolled {
      background: rgba(15, 23, 42, 0.9);
      border-bottom-color: rgba(14,165,233,0.3);
    }

    /* FAQ动画 */
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease, padding 0.4s ease;
    }

    .faq-item.active .faq-answer {
      max-height: 200px;
      padding-top: 1rem;
    }

    .faq-item.active .faq-arrow {
      transform: rotate(180deg);
    }

    /* 表单输入 */
    .input-glass {
      background: rgba(255,255,255,0.05);
      border: 1px solid rgba(255,255,255,0.1);
      border-radius: 8px;
      padding: 0.75rem 1rem;
      color: white;
      transition: var(--transition-smooth);
      width: 100%;
    }

    .input-glass:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 15px rgba(14,165,233,0.4);
    }

    /* 计数动画 */
    @keyframes softPulse {
      0% { opacity: 0.8; text-shadow: 0 0 5px currentColor; }
      50% { opacity: 1; text-shadow: 0 0 18px currentColor; }
      100% { opacity: 0.8; text-shadow: 0 0 5px currentColor; }
    }

    .animate-pulse-glow {
      animation: softPulse 3s infinite;
    }

    /* 网格背景动效 */
    .bg-mesh {
      background-image: radial-gradient(rgba(56,189,248,0.1) 1px, transparent 1px);
      background-size: 40px 40px;
    }