/* roulang page: index */
:root {
      --primary: #0A0E27;
      --accent-cyan: #00F0FF;
      --accent-red: #FF4655;
      --bg-deep: #060B1A;
      --card-bg: #0F1535;
      --glass-bg: rgba(15, 21, 53, 0.6);
      --glass-border: rgba(0, 240, 255, 0.15);
      --text-dim: #9CA3AF;
      --text-body: #D1D5DB;
      --radius-lg: 16px;
      --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
      --shadow-glow-red: 0 0 20px rgba(255, 70, 85, 0.5);
      --shadow-glow-cyan: 0 0 15px rgba(0, 240, 255, 0.3);
    }

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

    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
      background-color: var(--bg-deep);
      color: var(--text-body);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    .font-mono {
      font-family: 'DIN Alternate', 'Roboto Mono', 'Orbitron', monospace;
    }

    .glass-panel {
      background: var(--glass-bg);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-card);
    }

    .glass-panel-strong {
      background: rgba(15, 21, 53, 0.75);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border: 1px solid rgba(0, 240, 255, 0.25);
      border-radius: var(--radius-lg);
      box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    }

    .btn-glow-red {
      background-color: var(--accent-red);
      color: white;
      border-radius: 8px;
      font-weight: 600;
      transition: all 0.25s ease;
      box-shadow: var(--shadow-glow-red);
      border: none;
      cursor: pointer;
    }

    .btn-glow-red:hover {
      box-shadow: 0 0 30px rgba(255, 70, 85, 0.8);
      transform: scale(1.03);
    }

    .btn-ghost-cyan {
      border: 1px solid var(--accent-cyan);
      color: var(--accent-cyan);
      background: transparent;
      border-radius: 8px;
      font-weight: 600;
      transition: all 0.25s ease;
      cursor: pointer;
    }

    .btn-ghost-cyan:hover {
      background: rgba(0, 240, 255, 0.1);
      box-shadow: var(--shadow-glow-cyan);
      transform: translateY(-1px);
    }

    .section-title {
      position: relative;
      padding-left: 1.5rem;
      font-weight: 700;
      color: white;
    }

    .section-title::before {
      content: '';
      position: absolute;
      left: 0;
      top: 50%;
      transform: translateY(-50%);
      width: 4px;
      height: 28px;
      background-color: var(--accent-cyan);
      border-radius: 2px;
      box-shadow: 0 0 12px var(--accent-cyan);
    }

    .card-hover {
      transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
      border: 1px solid rgba(255, 255, 255, 0.08);
    }

    .card-hover:hover {
      transform: translateY(-8px);
      border-color: var(--accent-cyan);
      box-shadow: 0 16px 40px rgba(0, 240, 255, 0.15);
    }

    .counter-animation {
      transition: all 0.1s ease;
    }

    @keyframes pulse-glow {
      0% { opacity: 0.8; }
      50% { opacity: 1; text-shadow: 0 0 8px var(--accent-cyan); }
      100% { opacity: 0.8; }
    }

    .live-indicator {
      animation: pulse-glow 1.5s infinite;
    }

    input, textarea {
      background-color: #0A0E27;
      border: 1px solid #374151;
      color: white;
      border-radius: 8px;
      padding: 0.75rem 1rem;
      width: 100%;
      transition: border 0.2s;
    }

    input:focus, textarea:focus {
      outline: none;
      border-color: var(--accent-cyan);
      box-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
    }

    /* 移动端菜单 */
    .mobile-menu {
      display: none;
    }

    @media (max-width: 768px) {
      .desktop-nav-links {
        display: none;
      }
      .mobile-menu {
        display: block;
      }
      .hero-image-area {
        margin-top: 2.5rem;
      }
    }

    .faq-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
    }

    .faq-item.active .faq-content {
      max-height: 200px;
    }

    footer a:hover {
      color: var(--accent-cyan);
    }