:root {
  --bg: #f7f8fa;
  --card: #ffffff;
  --border: #e5e7eb;
  --text: #1f2328;
  --text-2: #6b7280;
  --accent: #185FA5;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
}
.site-header { padding: 48px 24px 8px; text-align: center; }
.site-header h1 { margin: 0; font-size: 28px; font-weight: 600; }
.subtitle { margin: 6px 0 0; color: var(--text-2); font-size: 14px; }
.container { max-width: 1080px; margin: 0 auto; padding: 24px; }
.toolbar { display: flex; flex-direction: column; gap: 12px; margin-bottom: 24px; }
.search {
  width: 100%;
  padding: 10px 14px;
  font-size: 14px;
  font-family: inherit;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--card);
  color: var(--text);
  outline: none;
}
.search:focus { border-color: var(--accent); }
.tag-bar { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  padding: 4px 12px;
  font: inherit;
  font-size: 13px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--card);
  color: var(--text-2);
  cursor: pointer;
}
.tag.active { border-color: var(--accent); color: var(--accent); background: #E6F1FB; }
.card-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
}
.card {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 18px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  transition: transform .15s ease, box-shadow .15s ease;
}
.card:hover { transform: translateY(-2px); box-shadow: 0 6px 16px rgba(0, 0, 0, .06); }
.avatar {
  flex: none;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 20px;
  font-weight: 600;
}
.card-body { min-width: 0; display: flex; flex-direction: column; }
.card-title { font-size: 16px; font-weight: 600; }
.card-desc { margin-top: 4px; font-size: 13px; color: var(--text-2); }
.card-tags { margin-top: 8px; display: flex; flex-wrap: wrap; gap: 6px; }
.card-tag { font-size: 12px; color: var(--text-2); background: var(--bg); border-radius: 6px; padding: 2px 8px; }
.empty, .fallback { text-align: center; color: var(--text-2); padding: 40px 0; }
.fallback { color: #A32D2D; }
.site-footer { text-align: center; color: var(--text-2); font-size: 13px; padding: 32px 24px 48px; }