:root {
  --fg: #111827; --muted: #6b7280; --border: #e5e7eb; --bg-soft: #f9fafb; --accent: #ff9d00;
  --blue: #2563eb; --radius: 10px;
  font-family: "Source Sans Pro", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; color: var(--fg); background: #fff; font-size: 15px; line-height: 1.5; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--blue); }
code, pre { font-family: "IBM Plex Mono", ui-monospace, Menlo, monospace; font-size: 13px; }
.wrap { max-width: 1400px; margin: 0 auto; padding: 0 24px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }

/* top bar */
.topbar { border-bottom: 1px solid var(--border); background: #fff; position: sticky; top: 0; z-index: 10; }
.topbar-inner { display: flex; align-items: center; gap: 20px; height: 60px; }
.logo { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 18px; white-space: nowrap; }
.logo-mark { font-size: 24px; }
.topsearch { flex: 1; max-width: 420px; }
.topsearch input, .hero-search input {
  width: 100%; padding: 7px 12px; border: 1px solid var(--border); border-radius: 8px; background: var(--bg-soft);
  font-size: 14px; outline: none;
}
.topsearch input:focus, .hero-search input:focus { border-color: #93c5fd; background: #fff; box-shadow: 0 0 0 3px #dbeafe; }
.topnav { display: flex; gap: 4px; margin-left: auto; }
.topnav a { padding: 6px 12px; border-radius: 8px; font-weight: 600; color: #374151; white-space: nowrap; }
.topnav a:hover, .topnav a.active { background: var(--bg-soft); color: var(--fg); }
.lang-switch { border: 1px solid var(--border); }

/* home */
.hero { text-align: center; padding: 56px 0 32px; }
.hero h1 { font-size: 40px; margin: 0 0 8px; }
.hero-search { display: flex; gap: 8px; max-width: 640px; margin: 24px auto 16px; }
.hero-search input { padding: 12px 16px; font-size: 16px; }
.hero-search button, .btn {
  padding: 10px 18px; border-radius: 8px; border: 1px solid var(--border); background: var(--fg); color: #fff;
  font-weight: 600; cursor: pointer; white-space: nowrap; display: inline-block;
}
.btn:hover { color: #fff; opacity: .9; }
.home-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; margin: 24px 0; }
.home-grid h2, .howto h2 { font-size: 18px; margin: 20px 0 10px; }
.howto { border-top: 1px solid var(--border); margin-top: 24px; padding-top: 8px; color: #374151; }

/* chips */
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  border: 1px solid var(--border); border-radius: 8px; padding: 3px 10px; font-size: 14px; background: #fff;
}
.chip b { color: var(--muted); font-weight: 400; margin-left: 4px; }
.chip:hover { border-color: #9ca3af; color: var(--fg); background: var(--bg-soft); }
.chip.on { background: var(--fg); color: #fff; border-color: var(--fg); }
.chip.on b { color: #d1d5db; }
.chips.small .chip { font-size: 13px; padding: 2px 8px; }

/* models list */
.layout { display: grid; grid-template-columns: 300px 1fr; gap: 32px; padding-top: 24px; }
.sidebar { border-right: 1px solid var(--border); padding-right: 20px; }
.facet h3 { font-size: 14px; margin: 18px 0 8px; color: #374151; }
.results-head { display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
.results-head h1 { font-size: 22px; margin: 0; }
.count { color: var(--muted); font-weight: 400; font-size: 18px; margin-left: 6px; }
.qtag { font-size: 16px; color: var(--blue); margin-left: 8px; font-weight: 400; }
.sortbar { font-size: 13px; color: var(--muted); }
.sortbar a { margin-left: 10px; color: #374151; }
.sortbar a.on { font-weight: 700; color: var(--fg); border-bottom: 2px solid var(--accent); }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(380px, 1fr)); gap: 12px; margin: 16px 0; }
.cards.one-col { grid-template-columns: 1fr; }
.mcard {
  display: block; border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 14px;
  background: linear-gradient(to bottom right, #fff, var(--bg-soft)); transition: box-shadow .15s;
}
.mcard:hover { box-shadow: 0 2px 10px rgba(0,0,0,.08); color: var(--fg); border-color: #d1d5db; }
.mcard-head { display: flex; align-items: center; gap: 8px; }
.mcard-icon { font-size: 16px; }
.mcard-id { font-weight: 600; font-family: "IBM Plex Mono", ui-monospace, monospace; font-size: 14px; overflow: hidden;
  text-overflow: ellipsis; white-space: nowrap; }
.mcard-meta { color: var(--muted); font-size: 13px; margin-top: 4px; display: flex; flex-wrap: wrap; gap: 4px; }
.dot { color: #d1d5db; }
.mcard-sum { color: #4b5563; font-size: 13px; margin-top: 6px; display: -webkit-box; -webkit-line-clamp: 2;
  -webkit-box-orient: vertical; overflow: hidden; }
.pager { display: flex; gap: 4px; justify-content: center; margin: 24px 0; flex-wrap: wrap; }
.pager a { padding: 4px 10px; border: 1px solid var(--border); border-radius: 6px; font-size: 14px; }
.pager a.on { background: var(--fg); color: #fff; border-color: var(--fg); }

/* model page */
.model-head { border-bottom: 1px solid var(--border); padding-top: 24px; background: linear-gradient(to bottom, var(--bg-soft), #fff); margin: 0 -24px; padding-left: 24px; padding-right: 24px; }
.model-head h1 { font-size: 24px; margin: 0 0 12px; font-family: "IBM Plex Mono", ui-monospace, monospace; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
.tag { border: 1px solid var(--border); border-radius: 6px; padding: 1px 8px; font-size: 13px; background: #fff; }
.tag.light { color: var(--muted); }
.t-domain { background: #eff6ff; border-color: #bfdbfe; color: #1d4ed8; }
.t-cat { background: #f5f3ff; border-color: #ddd6fe; color: #6d28d9; }
.t-lib { background: #fff7ed; border-color: #fed7aa; color: #c2410c; }
.t-lic { background: #f0fdf4; border-color: #bbf7d0; color: #15803d; }
.t-paper { background: #fef2f2; border-color: #fecaca; color: #b91c1c; }
.tabs { display: flex; gap: 4px; }
.tabs a { padding: 8px 14px; font-weight: 600; color: var(--muted); border-bottom: 2px solid transparent; }
.tabs a.on { color: var(--fg); border-bottom-color: var(--fg); }
.model-layout { display: grid; grid-template-columns: 1fr 340px; gap: 32px; padding-top: 20px; }
.model-side .panel { border: 1px solid var(--border); border-radius: var(--radius); padding: 14px; margin-bottom: 14px; }
.stat { display: flex; justify-content: space-between; padding: 2px 0; }
.stat b { font-size: 18px; }
.panel dl { margin: 0; display: grid; grid-template-columns: auto 1fr; gap: 6px 12px; font-size: 14px; }
.panel dt { color: var(--muted); }
.panel dd { margin: 0; word-break: break-all; }
.panel.request h3 { margin: 0 0 6px; font-size: 15px; }
.panel pre { background: var(--bg-soft); border: 1px solid var(--border); border-radius: 6px; padding: 8px; white-space: pre-wrap; }
.filelist { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.filelist-head { background: var(--bg-soft); padding: 10px 14px; border-bottom: 1px solid var(--border); font-size: 14px; }
.file { padding: 7px 14px; border-bottom: 1px solid var(--border); font-family: "IBM Plex Mono", ui-monospace, monospace; font-size: 13px; }
.file:last-child { border-bottom: 0; }

/* rendered model cards */
.markdown { overflow-wrap: anywhere; }
.markdown h1 { font-size: 24px; } .markdown h2 { font-size: 20px; border-bottom: 1px solid var(--border); padding-bottom: 4px; }
.markdown h3 { font-size: 17px; }
.markdown a { color: var(--blue); }
.markdown pre { background: var(--bg-soft); border: 1px solid var(--border); border-radius: 8px; padding: 12px; overflow-x: auto; }
.markdown code { background: var(--bg-soft); padding: 1px 4px; border-radius: 4px; }
.markdown pre code { background: none; padding: 0; }
.markdown table { border-collapse: collapse; display: block; overflow-x: auto; font-size: 14px; margin: 12px 0; }
.markdown th, .markdown td { border: 1px solid var(--border); padding: 5px 10px; }
.markdown th { background: var(--bg-soft); }
.markdown blockquote { border-left: 4px solid var(--border); margin: 0; padding-left: 12px; color: var(--muted); }

.empty { text-align: center; color: var(--muted); padding: 80px 0; font-size: 16px; }
.footer { color: var(--muted); font-size: 13px; padding: 32px 24px; border-top: 1px solid var(--border); margin-top: 40px; }

@media (max-width: 900px) {
  .layout, .model-layout, .home-grid { grid-template-columns: 1fr; }
  .sidebar { border-right: 0; padding-right: 0; }
  .topsearch { display: none; }
}

.t-dept { background: #ecfeff; border-color: #a5f3fc; color: #0e7490; }
.chip.dept { border-color: #a5f3fc; }
.notice { background: #fffbeb; border: 1px solid #fde68a; color: #92400e; border-radius: 8px; padding: 8px 12px; font-size: 14px; margin: 8px 0; }
.rule { margin: -4px 0 8px; line-height: 1.4; }
.prov { border-radius: 6px; padding: 0 6px; }
.prov-official { background: #f0fdf4; color: #15803d; }
.prov-mirror { background: #eff6ff; color: #1d4ed8; }
.prov-processed { background: #fff7ed; color: #c2410c; }
.hero .btn + .btn { margin-left: 8px; }
.public-note { background: #fffbeb; border-bottom: 1px solid #fde68a; color: #92400e; font-size: 13px; padding: 6px 0; }