:root {
    --brand: #0a66c2;
    --ink: #111;
    --muted: #666;
    --bg: #fff;
    --panel: #fafafa;
    --border: #eaeaea;
    --radius: 14px;
    --container: 1200px;
  }

  body {
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Noto Sans SC", sans-serif;
    color: var(--ink);
    background: var(--bg);
    margin: 0;
    line-height: 1.75;
  }

  header.hero {
    background: linear-gradient(180deg, var(--brand), #0a5ad1);
    color: #fff;
    padding: 60px 20px;
    text-align: center;
    position: relative;
  }

  .hero-logo {
    width: 120px;
    margin-bottom: 14px;
    filter: drop-shadow(0 3px 6px rgba(0,0,0,0.2));
  }

  header.hero h1 {
    font-size: 34px;
    margin-bottom: 6px;
  }

  header.hero p {
    color: #e6f2ff;
    font-size: 16px;
    margin: 0 0 20px;
  }

  /* 搜索栏 */
  .search-bar {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin: 10px auto 0;
  }

  .search-bar input {
    width: 280px;
    padding: 10px 14px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 15px;
    outline: none;
  }

  .search-bar input:focus {
    border-color: var(--brand);
    box-shadow: 0 0 0 3px rgba(10,102,194,0.15);
  }

  .nav {
    background: var(--panel);
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 14px;
    padding: 12px 10px;
  }

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

  .nav a:hover,
  .nav a.active {
    background: var(--brand);
    color: #fff;
  }

  .layout {
    max-width: var(--container);
    margin: 40px auto;
    padding: 0 20px;
  }

  .section-title {
    font-size: 22px;
    border-left: 4px solid var(--brand);
    padding-left: 10px;
    margin: 40px 0 20px;
    color: var(--ink);
  }

  .grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 24px;
  }

  .card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: all 0.3s ease;
    text-decoration: none;
    color: inherit;
    opacity: 1;
    transform: scale(1);
  }

  .card.hide {
    opacity: 0;
    transform: scale(0.97);
    pointer-events: none;
  }

  .card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
  }

  .card-body {
    padding: 16px 18px 22px;
  }

  .card-body h2 {
    font-size: 20px;
    margin: 0 0 8px;
    color: var(--brand);
  }

  .card-body p {
    color: var(--muted);
    font-size: 15px;
    margin: 0 0 10px;
  }

  .meta {
    font-size: 13px;
    color: #888;
  }

  footer.page {
    text-align: center;
    padding: 24px 0;
    color: var(--muted);
    border-top: 1px solid var(--border);
    margin-top: 40px;
  }

  @media (max-width: 600px) {
    .hero-logo { width: 90px; }
    header.hero h1 { font-size: 28px; }
    .grid { grid-template-columns: 1fr; }
    .search-bar input { width: 90%; }
  }