:root {
        --primary: #4361ee;
        --primary-light: #4cc9f0;
        --secondary: #7209b7;
        --white: #ffffff;
        --light-bg: #f8f9fa;
        --card-bg: #ffffff;
        --text: #2b2d42;
        --text-light: #6c757d;
        --border: #e9ecef;
        --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
      }

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

      body {
        font-family: "Noto Sans SC", -apple-system, BlinkMacSystemFont,
          sans-serif;
        color: var(--text);
        background-color: var(--light-bg);
        line-height: 1.6;
      }

      #app {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 20px;
        min-height: 100vh;
        display: flex;
        flex-direction: column;
      }

      header {
        padding: 30px 0;
        border-bottom: 1px solid var(--border);
        margin-bottom: 40px;
      }

      .nav {
        display: flex;
        justify-content: space-between;
        align-items: center;
      }

      .logo {
        font-size: 1.3rem;
        font-weight: 700;
        color: var(--primary);
        text-decoration: none;
      }

      .nav-links {
        display: flex;
        gap: 15px;
      }

      .nav-link {
        color: var(--text);
        text-decoration: none;
        font-weight: 500;
        padding: 6px 10px;
        border-radius: 6px;
        transition: all 0.2s ease;
        font-size: 0.9rem;
      }

      .nav-link.active {
        color: var(--primary);
        font-weight: 600;
      }
      .hero {
        text-align: center;
        padding: 40px 0;
        flex: 1;
      }

      .hero-icon {
        max-width: 80px;
        max-height: 80px;
        margin-bottom: 20px;
      }

      .hero h1 {
        font-size: 1.8rem;
        margin-bottom: 15px;
      }

      .hero p {
        font-size: 1rem;
        margin: 0 auto 30px;
        max-width: 90%;
      }

      /* 移动端专用按钮布局 */
      .mobile-actions {
        display: flex;
        flex-direction: column;
        gap: 12px;
        width: 90%;
        max-width: 300px;
        margin: 0 auto;
      }

      .btn-primary {
  display: block;
  padding: 14px;
  background: linear-gradient(135deg, #ff6b6b, #ff8e8e);
  color: white;
  border-radius: 8px;
  font-weight: 500;
  text-decoration: none;
  text-align: center;
  box-shadow: 0 4px 12px rgba(255, 107, 107, 0.25);
  transition: all 0.3s ease;
}
.btn-primary:hover {
  background: linear-gradient(135deg, #ff8e8e, #ff6b6b);
}

      .btn-secondary {
        display: block;
        padding: 12px;
        background: white;
        color: var(--primary);
        border-radius: 8px;
        font-weight: 500;
        text-decoration: none;
        text-align: center;
        border: 1px solid var(--primary);
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
      }

      .btn-group {
        display: flex;
        gap: 10px;
      }

      .btn-group .btn-secondary {
        flex: 1;
        padding: 12px 8px;
        font-size: 0.9rem;
      }

      /* 底部样式 */
      .footer {
        text-align: center;
        padding: 20px 0;
        margin-top: auto;
        border-top: 1px solid var(--border);
        color: var(--text-light);
        font-size: 0.85rem;
      }

      .footer-links {
        display: flex;
        justify-content: center;
        gap: 15px;
        margin-bottom: 10px;
        flex-wrap: wrap;
      }

      .footer-link {
        color: var(--primary);
        text-decoration: none;
      }

      .footer-copyright {
        color: var(--text-light);
      }

      /* 桌面端适配 */
      @media (min-width: 768px) {
        header {
          padding: 30px 0;
          margin-bottom: 40px;
        }

        .logo {
          font-size: 1.5rem;
        }

        .hero {
          padding: 60px 0;
        }

        .hero-icon {
          max-width: 100px;
          max-height: 100px;
          margin-bottom: 30px;
        }

        .hero h1 {
          font-size: 2.5rem;
        }

        .hero p {
          font-size: 1.2rem;
        }

        .mobile-actions {
          max-width: 400px;
        }

        .btn-group .btn-secondary {
          padding: 12px;
          font-size: 1rem;
        }

        .footer {
          padding: 30px 0;
          font-size: 0.9rem;
        }
      }