:root {
      --bg-light: #f5f7fa;
      --bg-dark: #1b1d20;
      --card-light: #ffffff;
      --card-dark: #2a2b2f;
      --text-light: #111;
      --text-dark: #f0f0f0;
      --shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
      /* Added custom colors for notice */
      --notice-bg-light: #fff3cd;
      --notice-text-light: #856404;
      --notice-bg-dark: #343a40;
      --notice-text-dark: #e0e0e0;
    }

    body {
      margin: 0;
      font-family: 'Inter', 'PingFang SC', sans-serif;
      background: linear-gradient(135deg, #edf2f7, #e0ecff);
      color: var(--text-light);
      display: flex;
      align-items: center;
      justify-content: center;
      min-height: 100vh;
      padding: 40px 20px;
      flex-direction: column;
    }

    .notice {
      text-align: center;
      margin-bottom: 30px;
      padding: 20px;
      border-radius: 12px;
      background-color: var(--notice-bg-light);
      color: var(--notice-text-light);
      box-shadow: var(--shadow);
      max-width: 800px;
      width: 100%;
      font-size: 1.1rem;
      font-weight: 500;
      border: 1px solid rgba(214, 209, 186, 0.5);
    }

    .notice a {
        color: #007bff;
        text-decoration: underline;
    }
    .notice a:hover {
        color: #0056b3;
    }

    .copy-btn {
        background-color: #28a745;
        border: none;
        color: white;
        padding: 12px 24px;
        text-align: center;
        text-decoration: none;
        display: inline-block;
        font-size: 1rem;
        font-weight: 600;
        margin-top: 15px;
        cursor: pointer;
        border-radius: 8px;
        transition: background-color 0.3s ease, transform 0.2s ease;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    }

    .copy-btn:hover {
        background-color: #218838;
        transform: translateY(-2px);
        box-shadow: 0 6px 8px rgba(0, 0, 0, 0.15);
    }

    .copy-btn:active {
        transform: translateY(0);
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    }

    .grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 32px;
      max-width: 800px;
      width: 100%;
    }

    .card {
      background: var(--card-light);
      border-radius: 24px;
      padding: 2rem;
      text-align: center;
      text-decoration: none;
      color: inherit;
      box-shadow: var(--shadow);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      display: flex;
      flex-direction: column;
      align-items: center;
    }

    .card:hover {
      transform: translateY(-6px);
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
    }

    .icon {
      width: 64px; /* 可根据需要调整大小 */
      height: 64px;
      object-fit: contain;
      margin-bottom: 1rem;
    }

    .title {
      font-size: 1.2rem;
      font-weight: 600;
    }

    @media (prefers-color-scheme: dark) {
      body {
        background: linear-gradient(135deg, #1f1f1f, #2d2e32);
        color: var(--text-dark);
      }
      .card {
        background: var(--card-dark);
        color: var(--text-dark);
      }
      .notice {
          background-color: var(--notice-bg-dark);
          color: var(--notice-text-dark);
          border: 1px solid #495057;
      }
      .notice a {
          color: #6ea8fe;
      }
      .notice a:hover {
          color: #3d8bfd;
      }
    }