:root {
  --bg: #f5f6f8;
  --card: #fff;
  --text: #1f2937;
  --muted: #6b7280;
  --line: #e5e7eb;
  --brand: #2563eb;
  --accent: #7c3aed;
  --nav-bg: #0a0d12;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
.topnav {
  position: sticky; top: 0; z-index: 50;
  display: flex; flex-wrap: wrap; gap: 8px; align-items: center;
  padding: 10px 16px; background: var(--nav-bg);
  border-bottom: 1px solid rgba(255,255,255,.1);
}
.topnav .brand { color: #e8eaed; font-weight: 700; font-size: 14px; margin-right: 6px; }
.topnav a {
  color: #c7d2fe; font-size: 13px; padding: 6px 10px; border-radius: 999px;
  border: 1px solid rgba(99,102,241,.35); background: rgba(99,102,241,.12);
  text-decoration: none;
}
.topnav a.on { color: #fff; background: rgba(124,58,237,.35); border-color: rgba(124,58,237,.55); }
.wrap { max-width: 1180px; margin: 0 auto; padding: 20px 16px 80px; }
.hero {
  background: linear-gradient(135deg, #eef2ff, #f5f3ff);
  border: 1px solid #e0e7ff;
  border-radius: 16px;
  padding: 22px 24px;
  margin-bottom: 18px;
}
.hero h1 { margin: 0 0 8px; font-size: 1.6rem; }
.hero p { margin: 0; color: var(--muted); font-size: 14px; }
.toolbar {
  display: flex; flex-wrap: wrap; gap: 10px; align-items: center;
  margin-bottom: 16px;
}
.toolbar input {
  flex: 1; min-width: 200px; height: 40px; border: 1px solid var(--line);
  border-radius: 10px; padding: 0 12px; font-size: 14px;
}
.chips { display: flex; flex-wrap: wrap; gap: 8px; flex: 1; }
.filter-row {
  display: flex; flex-wrap: wrap; align-items: center; gap: 10px;
  margin-bottom: 14px; padding: 12px 14px; background: #fff;
  border: 1px solid var(--line); border-radius: 12px;
}
.filter-label {
  font-size: 13px; color: var(--muted); white-space: nowrap;
  padding-right: 8px; border-right: 1px solid var(--line); margin-right: 4px;
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}
.card img {
  width: 100%; height: 180px; object-fit: cover; object-position: center top;
  background: #f3f4f6;
  display: block;
}
.card .foot {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: 10px; font-size: 12px; color: var(--muted);
}
.card .cat-badge {
  font-size: 11px; color: #2563eb; background: #eff6ff;
  border: 1px solid #bfdbfe; padding: 2px 8px; border-radius: 999px;
}
.chip {
  border: 1px solid var(--line); background: #fff; color: #374151;
  padding: 6px 12px; border-radius: 999px; font-size: 13px; cursor: pointer;
}
.chip.on { background: #7c3aed; color: #fff; border-color: #7c3aed; }
.meta-bar {
  display: flex; flex-wrap: wrap; gap: 12px; align-items: center;
  font-size: 13px; color: var(--muted); margin-bottom: 14px;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  transition: box-shadow .2s, transform .2s;
  cursor: pointer;
}
.card:hover {
  box-shadow: 0 8px 24px rgba(15,23,42,.08);
  transform: translateY(-2px);
}
.card img {
  width: 100%; height: 180px; object-fit: cover; object-position: center top;
  background: #f3f4f6;
  display: block;
}
.card .body { padding: 12px 14px 14px; }
.card h3 {
  margin: 0 0 8px; font-size: 14px; line-height: 1.45;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.card .tag {
  font-size: 11px; color: #7c3aed; background: #f5f3ff;
  border: 1px solid #ddd6fe; padding: 2px 8px; border-radius: 999px;
}
.empty {
  text-align: center; color: var(--muted); padding: 48px 16px;
  border: 1px dashed var(--line); border-radius: 14px; background: #fff;
}
/* detail */
.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 24px;
  margin-bottom: 16px;
  box-shadow: 0 4px 20px rgba(15,23,42,.04);
}
.panel h1 { margin: 0 0 12px; font-size: clamp(1.35rem, 3vw, 1.8rem); }
.meta { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.tag {
  font-size: 12px; padding: 4px 10px; border-radius: 999px;
  background: #f3f4f6; color: #4b5563; border: 1px solid var(--line);
}
.tag.purple { background: #f5f3ff; color: #7c3aed; border-color: #ddd6fe; }
.tag.blue { background: #eff6ff; color: #2563eb; border-color: #bfdbfe; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 8px; }
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 16px; border-radius: 10px; font-size: 14px; font-weight: 600;
  border: 0; cursor: pointer; text-decoration: none !important;
}
.btn-primary { background: linear-gradient(135deg, #7c3aed, #2563eb); color: #fff; }
.btn-ghost { background: #fff; color: #374151; border: 1px solid var(--line); }
.cover {
  display: block; width: 100%; border-radius: 12px; border: 1px solid var(--line);
  background: #fff; margin: 8px 0 0;
}
.prose p { margin: 0 0 12px; color: #374151; font-size: 15px; }
.warn {
  margin-top: 8px; padding: 14px 16px; border-radius: 12px;
  background: #fff7ed; border: 1px solid #fed7aa; color: #9a3412; font-size: 13px;
}
.gate {
  display: none; position: fixed; inset: 0; z-index: 200;
  background: rgba(15, 23, 42, .55);
  align-items: center; justify-content: center; padding: 16px;
}
.gate.show { display: flex; }
.gate-box {
  width: 100%; max-width: 380px; background: #fff; border-radius: 14px;
  padding: 22px; box-shadow: 0 20px 50px rgba(0,0,0,.25);
}
.gate-box input {
  width: 100%; height: 42px; border: 1px solid var(--line); border-radius: 10px;
  padding: 0 12px; font-size: 14px; margin-bottom: 10px;
}
.gate-err { color: #dc2626; font-size: 13px; min-height: 18px; margin-bottom: 8px; }
footer { text-align: center; color: var(--muted); font-size: 12px; margin-top: 24px; }
.crumb { font-size: 13px; color: var(--muted); margin-bottom: 14px; }