/* roulang page: index */
:root {
      --bg-deep: #0A0E27;
      --primary-cyan: #00E5FF;
      --secondary-violet: #7B2FFF;
      --glass-bg: rgba(255, 255, 255, 0.03);
      --glass-border: rgba(255, 255, 255, 0.08);
      --text-primary: #E8F0FE;
      --text-secondary: rgba(200, 210, 230, 0.7);
      --card-shadow: 0 8px 32px rgba(0, 229, 255, 0.08);
      --glow-cyan: 0 0 20px rgba(0, 229, 255, 0.3);
      --radius-card: 16px;
      --radius-btn: 12px;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Inter', system-ui, -apple-system, sans-serif;
      --transition-smooth: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1.2);
    }

    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: var(--font-sans);
      background-color: var(--bg-deep);
      color: var(--text-primary);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    .glass-panel {
      background: rgba(255, 255, 255, 0.03);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-card);
      box-shadow: var(--card-shadow);
    }

    .glass-card {
      background: rgba(255, 255, 255, 0.03);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid rgba(255, 255, 255, 0.06);
      border-radius: var(--radius-card);
      padding: 2rem;
      transition: var(--transition-smooth);
      box-shadow: 0 4px 20px rgba(0,0,0,0.3);
    }

    .glass-card:hover {
      border-color: rgba(0, 229, 255, 0.3);
      transform: translateY(-6px);
      box-shadow: 0 16px 40px rgba(0, 229, 255, 0.15);
    }

    .btn-primary {
      background: linear-gradient(135deg, #00E5FF 0%, #00B8D4 100%);
      color: #0A0E27;
      font-weight: 600;
      border: none;
      border-radius: var(--radius-btn);
      padding: 0.9rem 2.2rem;
      box-shadow: 0 0 20px rgba(0, 229, 255, 0.4);
      transition: all 0.25s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      letter-spacing: 0.5px;
      cursor: pointer;
      text-decoration: none;
    }

    .btn-primary:hover {
      filter: brightness(1.2);
      box-shadow: 0 0 30px rgba(0, 229, 255, 0.7);
      transform: scale(1.02);
    }

    .btn-outline {
      background: transparent;
      border: 1px solid #00E5FF;
      color: #00E5FF;
      border-radius: var(--radius-btn);
      padding: 0.7rem 1.8rem;
      transition: all 0.25s ease;
      font-weight: 500;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      cursor: pointer;
      text-decoration: none;
    }

    .btn-outline:hover {
      background: rgba(0, 229, 255, 0.1);
      border-color: #7B2FFF;
      color: #fff;
      box-shadow: 0 0 18px rgba(123, 47, 255, 0.4);
    }

    .btn-glow {
      background: linear-gradient(135deg, #7B2FFF, #00E5FF);
      border: none;
      color: white;
      font-weight: 700;
      border-radius: 12px;
      padding: 0.9rem 2.5rem;
      box-shadow: 0 0 25px rgba(123, 47, 255, 0.6);
      animation: pulseGlow 2s infinite;
      transition: all 0.3s;
      cursor: pointer;
      letter-spacing: 1px;
    }

    @keyframes pulseGlow {
      0% { box-shadow: 0 0 15px rgba(123, 47, 255, 0.5), 0 0 30px rgba(0, 229, 255, 0.3); }
      50% { box-shadow: 0 0 25px rgba(123, 47, 255, 0.8), 0 0 50px rgba(0, 229, 255, 0.6); }
      100% { box-shadow: 0 0 15px rgba(123, 47, 255, 0.5), 0 0 30px rgba(0, 229, 255, 0.3); }
    }

    h2 {
      font-size: 2.25rem;
      font-weight: 600;
      margin-bottom: 2.5rem;
      display: flex;
      align-items: center;
      gap: 1rem;
    }
    h2::before {
      content: '';
      display: inline-block;
      width: 4px;
      height: 2rem;
      background: #00E5FF;
      border-radius: 4px;
      box-shadow: 0 0 15px #00E5FF;
    }

    .counter-digit {
      font-size: 3rem;
      font-weight: 800;
      color: #00E5FF;
      font-feature-settings: "tnum";
      letter-spacing: -0.5px;
      text-shadow: 0 0 12px rgba(0,229,255,0.5);
      font-family: 'Inter', 'PingFang SC', sans-serif;
    }

    input, textarea {
      background: rgba(255,255,255,0.05);
      backdrop-filter: blur(10px);
      border: 1px solid rgba(255,255,255,0.1);
      border-radius: 12px;
      padding: 0.85rem 1.2rem;
      color: white;
      transition: 0.2s;
      width: 100%;
      outline: none;
    }
    input:focus, textarea:focus {
      border-color: #00E5FF;
      box-shadow: 0 0 15px rgba(0,229,255,0.3);
    }

    .faq-item {
      border-bottom: 1px solid rgba(255,255,255,0.06);
    }
    .faq-question {
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 1.2rem 0;
      font-weight: 600;
      font-size: 1.2rem;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      color: var(--text-secondary);
    }

    @media (max-width: 768px) {
      h2 { font-size: 1.8rem; }
      .counter-digit { font-size: 2.2rem; }
    }