/* ===========================================================================
   Decision Models — 设计系统
   参考 OpenRouter 的克制风格：中性灰阶 + 单一强调色、细边框、紧凑表格、
   信息密度高但不拥挤。支持浅色 / 深色两套主题。
   =========================================================================== */

:root {
  --bg: #ffffff;
  --bg-subtle: #fafafa;
  --bg-muted: #f4f4f5;
  --card: #ffffff;
  --border: #e7e7ea;
  --border-strong: #d4d4d8;
  --fg: #18181b;
  --fg-muted: #63636b;
  --fg-subtle: #8e8e96;
  --accent: #3b5bdb;
  --accent-fg: #ffffff;
  --accent-soft: #eef2ff;
  --ok: #16803c;
  --ok-soft: #e8f6ee;
  --warn: #a16207;
  --warn-soft: #fdf6e3;
  --bad: #b42318;
  --bad-soft: #fdecea;
  --img: #7c3aed;
  --choice: #3b5bdb;
  --noul: #0d9276;
  --score: #b45309;
  --radius: 10px;
  --radius-sm: 7px;
  --shadow-sm: 0 1px 2px rgba(24, 24, 27, .05);
  --shadow: 0 4px 16px -4px rgba(24, 24, 27, .10), 0 1px 3px rgba(24, 24, 27, .06);
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  --maxw: 1280px;
}

html[data-theme="dark"] {
  --bg: #0c0c0e;
  --bg-subtle: #131316;
  --bg-muted: #1a1a1f;
  --card: #131316;
  --border: #26262c;
  --border-strong: #34343c;
  --fg: #f4f4f5;
  --fg-muted: #a1a1aa;
  --fg-subtle: #71717a;
  --accent: #7c93f8;
  --accent-fg: #0c0c0e;
  --accent-soft: #1c2340;
  --ok: #4ade80;
  --ok-soft: #10231a;
  --warn: #fbbf24;
  --warn-soft: #2a2110;
  --bad: #f87171;
  --bad-soft: #2a1414;
  --img: #a78bfa;
  --choice: #7c93f8;
  --noul: #2dd4bf;
  --score: #fbbf24;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);
  --shadow: 0 4px 16px -4px rgba(0, 0, 0, .5), 0 1px 3px rgba(0, 0, 0, .3);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent); }
h1, h2, h3, h4 { margin: 0; font-weight: 600; letter-spacing: -.015em; line-height: 1.28; }
h1 { font-size: 30px; }
h2 { font-size: 21px; }
h3 { font-size: 16px; }
p { margin: 0 0 10px; }
code, .mono { font-family: var(--mono); font-size: .92em; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.muted { color: var(--fg-muted); }
.subtle { color: var(--fg-subtle); }
.small { font-size: 12.5px; }
.tiny { font-size: 11.5px; }
.nowrap { white-space: nowrap; }
.center { text-align: center; }
.right { text-align: right; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ---------------- 顶栏 ---------------- */
header.top {
  position: sticky; top: 0; z-index: 60;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--border);
}
.top-inner { display: flex; align-items: center; gap: 20px; height: 56px; }
.brand { display: flex; align-items: center; gap: 8px; font-weight: 650; font-size: 15px; letter-spacing: -.02em; }
.brand:hover { color: var(--fg); }
.brand .logo { display: block; flex: none; width: 24px; height: 24px; border-radius: 6px; }
.brand-name { font-family: var(--mono); font-size: 14.5px; letter-spacing: -.01em; }
nav.main { display: flex; gap: 2px; margin-left: 6px; flex: 1; }
nav.main a {
  padding: 6px 11px; border-radius: var(--radius-sm); color: var(--fg-muted);
  font-weight: 500; font-size: 13.5px; white-space: nowrap;
}
nav.main a:hover { background: var(--bg-muted); color: var(--fg); }
nav.main a.on { background: var(--bg-muted); color: var(--fg); font-weight: 600; }
.top-actions { display: flex; align-items: center; gap: 8px; }

.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--card); color: var(--fg-muted);
  cursor: pointer; font-size: 14px;
}
.icon-btn:hover { border-color: var(--border-strong); color: var(--fg); }

/* ---------------- 通用组件 ---------------- */
.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px;
}
.card.pad-lg { padding: 22px; }
.card.link { transition: border-color .13s, transform .13s, box-shadow .13s; display: block; }
.card.link:hover { border-color: var(--border-strong); transform: translateY(-1px); box-shadow: var(--shadow); color: inherit; }

/* grid/flex 子项默认 min-width:auto，会被内部 nowrap 内容撑宽导致整页横向溢出 */
.grid { display: grid; gap: 12px; align-items: stretch; }
.grid > * { min-width: 0; }
.card { min-width: 0; }
.g2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.g3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.g4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.g-auto { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }

.btn {
  display: inline-flex; align-items: center; gap: 6px; padding: 6px 12px;
  border-radius: var(--radius-sm); border: 1px solid var(--border);
  background: var(--card); color: var(--fg); font-size: 13px; font-weight: 500;
  cursor: pointer; font-family: inherit;
}
.btn:hover { border-color: var(--border-strong); background: var(--bg-subtle); color: var(--fg); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-fg); }
.btn.primary:hover { filter: brightness(1.07); color: var(--accent-fg); }
.btn.sm { padding: 4px 9px; font-size: 12px; }

.tag {
  display: inline-flex; align-items: center; gap: 4px; padding: 2px 7px;
  border-radius: 999px; border: 1px solid var(--border); background: var(--bg-muted);
  font-size: 11.5px; font-weight: 500; color: var(--fg-muted); white-space: nowrap;
}
.tag.solid { background: var(--fg); color: var(--bg); border-color: var(--fg); }
.tag.choice { color: var(--choice); border-color: color-mix(in srgb, var(--choice) 34%, transparent); background: color-mix(in srgb, var(--choice) 10%, transparent); }
.tag.noul { color: var(--noul); border-color: color-mix(in srgb, var(--noul) 34%, transparent); background: color-mix(in srgb, var(--noul) 10%, transparent); }
.tag.score { color: var(--score); border-color: color-mix(in srgb, var(--score) 34%, transparent); background: color-mix(in srgb, var(--score) 10%, transparent); }
.tag.img { color: var(--img); border-color: color-mix(in srgb, var(--img) 34%, transparent); background: color-mix(in srgb, var(--img) 10%, transparent); }
.tag.ok { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 34%, transparent); background: var(--ok-soft); }
.tag.warn { color: var(--warn); border-color: color-mix(in srgb, var(--warn) 34%, transparent); background: var(--warn-soft); }
.tag.bad { color: var(--bad); border-color: color-mix(in srgb, var(--bad) 34%, transparent); background: var(--bad-soft); }

/* ---------------- 表单控件 ---------------- */
input[type="search"], input[type="text"], select {
  font-family: inherit; font-size: 13px; color: var(--fg);
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 7px 10px; width: 100%;
  appearance: none;
}
select { background-image: none; padding-right: 26px; cursor: pointer; }
input:focus, select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 16%, transparent); }
label.field { display: block; }
label.field > span { display: block; font-size: 11.5px; font-weight: 600; color: var(--fg-subtle); text-transform: uppercase; letter-spacing: .05em; margin-bottom: 5px; }

.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  padding: 4px 10px; border-radius: 999px; border: 1px solid var(--border);
  background: var(--card); font-size: 12.5px; cursor: pointer; color: var(--fg-muted);
  font-family: inherit; white-space: nowrap;
}
.chip:hover { border-color: var(--border-strong); color: var(--fg); }
.chip.on { background: var(--fg); border-color: var(--fg); color: var(--bg); font-weight: 600; }

/* ---------------- 表格 ---------------- */
.table-scroll { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); background: var(--card); }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
thead th {
  background: var(--bg-subtle); text-align: left; font-size: 11.5px;
  font-weight: 600; color: var(--fg-subtle); text-transform: uppercase; letter-spacing: .05em;
  padding: 9px 12px; border-bottom: 1px solid var(--border); white-space: nowrap;
}
thead th.sortable { cursor: pointer; user-select: none; }
thead th.sortable:hover { color: var(--fg); }
thead th .arrow { opacity: .35; font-size: 9px; margin-left: 3px; }
thead th.sorted .arrow { opacity: 1; color: var(--accent); }
tbody td { padding: 9px 12px; border-bottom: 1px solid var(--border); vertical-align: middle; }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--bg-subtle); }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; font-family: var(--mono); font-size: 12.5px; }

.rank-badge {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 22px; height: 22px; padding: 0 5px; border-radius: 6px;
  background: var(--bg-muted); font-size: 11.5px; font-weight: 650;
  font-variant-numeric: tabular-nums; color: var(--fg-muted);
}
.rank-badge.top1 { background: #fde68a; color: #713f12; }
.rank-badge.top2 { background: #e4e4e7; color: #3f3f46; }
.rank-badge.top3 { background: #fed7aa; color: #7c2d12; }
html[data-theme="dark"] .rank-badge.top1 { background: #4a3a10; color: #fde68a; }
html[data-theme="dark"] .rank-badge.top2 { background: #33333a; color: #e4e4e7; }
html[data-theme="dark"] .rank-badge.top3 { background: #48290f; color: #fed7aa; }

/* 分数条 */
.bar { position: relative; height: 5px; border-radius: 3px; background: var(--bg-muted); overflow: hidden; min-width: 46px; }
.bar > i { position: absolute; inset: 0 auto 0 0; border-radius: 3px; background: var(--accent); }
.bar.inline { flex: 1; }

/* ---------------- 页面骨架 ---------------- */
main { padding: 26px 0 70px; }
.page-head { margin-bottom: 20px; }
.page-head h1 { margin-bottom: 6px; }
.page-head p { color: var(--fg-muted); max-width: 76ch; margin: 0; }

.hero { padding: 40px 0 26px; }
.hero h1 { font-size: 38px; margin-bottom: 12px; letter-spacing: -.03em; }
.hero p.lead { font-size: 16px; color: var(--fg-muted); max-width: 70ch; margin-bottom: 20px; }

.crumbs { font-size: 12.5px; color: var(--fg-subtle); margin-bottom: 12px; display: flex; gap: 6px; flex-wrap: wrap; }
.crumbs a:hover { color: var(--accent); }

.section { margin-bottom: 34px; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 12px; }
.section-head h2 { font-size: 18px; }
.section-head .more { font-size: 13px; color: var(--fg-muted); }
.section-head .more:hover { color: var(--accent); }

.stat-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(132px, 1fr)); gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.stat { background: var(--card); padding: 14px 16px; }
.stat b { display: block; font-size: 24px; font-weight: 650; letter-spacing: -.02em; font-variant-numeric: tabular-nums; }
.stat span { font-size: 11.5px; color: var(--fg-subtle); text-transform: uppercase; letter-spacing: .05em; }

/* ---------------- 模型卡片 ---------------- */
.mcard { display: flex; flex-direction: column; gap: 10px; height: 100%; }
.mcard-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; }
.mcard-name { font-weight: 620; font-size: 14.5px; letter-spacing: -.01em; }
.mcard-vendor { font-size: 12.5px; color: var(--fg-muted); }
.mcard-desc { font-size: 12.5px; color: var(--fg-muted); display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; min-height: 3.9em; }
.mcard-tags { display: flex; flex-wrap: wrap; gap: 5px; }
.mcard-scores { display: flex; gap: 14px; padding-top: 10px; border-top: 1px solid var(--border); margin-top: auto; }
.mscore { display: flex; flex-direction: column; }
.mscore b { font-size: 16px; font-variant-numeric: tabular-nums; letter-spacing: -.02em; }
.mscore span { font-size: 10.5px; color: var(--fg-subtle); text-transform: uppercase; letter-spacing: .04em; }

/* ---------------- 详情页 ---------------- */
.detail-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; flex-wrap: wrap; margin-bottom: 18px; }
.detail-title h1 { font-size: 28px; margin-bottom: 8px; }
.detail-meta { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; margin-bottom: 10px; }
.detail-links { display: flex; flex-wrap: wrap; gap: 7px; }
.detail-links a {
  display: inline-flex; align-items: center; gap: 5px; padding: 5px 11px;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  font-size: 12.5px; background: var(--card); color: var(--fg-muted);
}
.detail-links a:hover { border-color: var(--accent); color: var(--accent); }
.detail-links a::after { content: "↗"; font-size: 10px; opacity: .55; }

.score-panel { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.score-cell { background: var(--card); padding: 14px 16px; }
.score-cell .lbl { font-size: 11.5px; color: var(--fg-subtle); text-transform: uppercase; letter-spacing: .05em; margin-bottom: 4px; }
.score-cell .val { font-size: 22px; font-weight: 650; font-variant-numeric: tabular-nums; letter-spacing: -.02em; }
.score-cell .sub { font-size: 11.5px; color: var(--fg-muted); }

.kv { display: grid; grid-template-columns: minmax(96px, 132px) 1fr; gap: 7px 14px; font-size: 13px; }
.kv dt { color: var(--fg-subtle); }
.kv dd { margin: 0; }

.prose h2 { margin: 22px 0 9px; font-size: 17px; }
.prose h3 { margin: 16px 0 7px; font-size: 14.5px; }
.prose p, .prose li { color: var(--fg-muted); font-size: 13.5px; }
.prose ul { margin: 0 0 12px; padding-left: 20px; }
.prose code { background: var(--bg-muted); padding: 1px 5px; border-radius: 4px; }
.prose pre { background: var(--bg-muted); padding: 12px; border-radius: var(--radius-sm); overflow-x: auto; font-size: 12px; border: 1px solid var(--border); }
.prose blockquote { margin: 12px 0; padding-left: 14px; border-left: 3px solid var(--border-strong); color: var(--fg-muted); font-style: italic; }

.tabs { display: flex; gap: 2px; border-bottom: 1px solid var(--border); margin-bottom: 16px; overflow-x: auto; }
.tabs button {
  padding: 8px 13px; border: none; background: none; font-family: inherit; font-size: 13.5px;
  color: var(--fg-muted); cursor: pointer; border-bottom: 2px solid transparent;
  margin-bottom: -1px; white-space: nowrap;
}
.tabs button:hover { color: var(--fg); }
.tabs button.on { color: var(--fg); border-bottom-color: var(--accent); font-weight: 600; }

/* ---------------- 新闻 ---------------- */
.news-item { display: grid; grid-template-columns: 88px 1fr; gap: 16px; padding: 15px 0; border-bottom: 1px solid var(--border); }
.news-item > * { min-width: 0; }
.news-title, .news-body { overflow-wrap: anywhere; }
.news-item:last-child { border-bottom: none; }
.news-date { font-size: 12px; color: var(--fg-subtle); font-variant-numeric: tabular-nums; padding-top: 2px; }
.news-title { font-weight: 600; font-size: 14.5px; margin-bottom: 4px; }
.news-body { font-size: 13px; color: var(--fg-muted); }
.news-links { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 7px; }
.news-links a { font-size: 12px; color: var(--accent); }
.news-links a::after { content: " ↗"; font-size: 9px; }

.ncard { display: flex; flex-direction: column; gap: 8px; }
.ncard-metrics { display: flex; gap: 10px; flex-wrap: wrap; font-size: 11.5px; color: var(--fg-subtle); font-variant-numeric: tabular-nums; }
.ncard quote, .ncard blockquote { margin: 0; padding-left: 10px; border-left: 2px solid var(--border-strong); font-size: 12.5px; color: var(--fg-muted); font-style: italic; }

/* ---------------- 其他 ---------------- */
.notice {
  border: 1px solid var(--border); border-left: 3px solid var(--warn);
  background: var(--bg-subtle); border-radius: var(--radius-sm);
  padding: 11px 14px; font-size: 12.5px; color: var(--fg-muted);
}
.notice.info { border-left-color: var(--accent); }

.pill-row { display: flex; flex-wrap: wrap; gap: 5px; }
.empty { padding: 44px 20px; text-align: center; color: var(--fg-subtle); font-size: 13.5px; }
.loading { padding: 40px; text-align: center; color: var(--fg-subtle); }

.toolbar {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(168px, 1fr));
  gap: 10px; align-items: end; padding: 13px; border: 1px solid var(--border);
  border-radius: var(--radius); background: var(--bg-subtle); margin-bottom: 14px;
}
.toolbar .wide { grid-column: span 2; }
@media (max-width: 700px) { .toolbar .wide { grid-column: span 1; } }
.toolbar-foot { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 10px; font-size: 12.5px; color: var(--fg-muted); }

/* 可收起的筛选条 */
.filter-bar {
  display: flex; align-items: center; gap: 9px; flex-wrap: wrap;
  padding: 9px 12px; margin-bottom: 12px;
  border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg-subtle);
}
.filter-bar .btn .chev { font-size: 10px; opacity: .7; margin-right: 1px; }
.filter-bar .btn.on { background: var(--bg-muted); border-color: var(--border-strong); }
.filter-count {
  font-size: 11.5px; font-weight: 600; color: var(--accent);
  background: var(--accent-soft); border-radius: 999px; padding: 2px 9px;
}
.filter-chips { display: flex; gap: 6px; flex-wrap: wrap; flex: 1; min-width: 0; }
.filter-chips .chip { font-size: 11.5px; padding: 3px 9px; }
.filter-bar-right { display: flex; align-items: center; gap: 7px; margin-left: auto; }
.view-switch { display: flex; gap: 0; }
.view-switch .btn { border-radius: 0; }
.view-switch .btn:first-child { border-radius: var(--radius-sm) 0 0 var(--radius-sm); }
.view-switch .btn:last-child { border-radius: 0 var(--radius-sm) var(--radius-sm) 0; margin-left: -1px; }
.toolbar[hidden] { display: none; }

.pager { display: flex; gap: 6px; align-items: center; justify-content: center; margin-top: 18px; }
.pager button { min-width: 32px; }
.pager button.on { background: var(--fg); color: var(--bg); border-color: var(--fg); }

footer.bottom { border-top: 1px solid var(--border); padding: 26px 0 40px; color: var(--fg-subtle); font-size: 12.5px; background: var(--bg-subtle); }
footer.bottom a { color: var(--fg-muted); }
footer.bottom .cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 22px; margin-bottom: 18px; }
footer.bottom h4 { font-size: 12px; text-transform: uppercase; letter-spacing: .05em; color: var(--fg-subtle); margin-bottom: 8px; }
footer.bottom ul { list-style: none; margin: 0; padding: 0; }
footer.bottom li { margin-bottom: 4px; }

.scroll-top {
  position: fixed; right: 20px; bottom: 20px; z-index: 50; display: none;
}
.scroll-top.on { display: block; }

@media (max-width: 900px) {
  .g4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .g3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero h1 { font-size: 30px; }
  nav.main { overflow-x: auto; }
}
@media (max-width: 620px) {
  .wrap { padding: 0 14px; }
  .g2, .g3, .g4 { grid-template-columns: 1fr; }
  .news-item { grid-template-columns: 1fr; gap: 4px; }
  thead th { top: 0; }
  .kv { grid-template-columns: 1fr; gap: 2px 0; }
  .kv dt { margin-top: 6px; }
}

/* ===========================================================================
   追加：品牌域名、首页叙事块、论文卡片
   =========================================================================== */
/* 首页叙事 */
.narrative { max-width: 78ch; }
.narrative h2 { margin: 30px 0 10px; font-size: 20px; }
.narrative h3 { margin: 20px 0 8px; font-size: 15.5px; }
.narrative p { color: var(--fg-muted); font-size: 14px; line-height: 1.78; margin-bottom: 12px; }
.narrative p strong, .narrative li strong { color: var(--fg); font-weight: 620; }
.narrative ul { margin: 0 0 12px; padding-left: 20px; }
.narrative li { color: var(--fg-muted); font-size: 13.5px; margin-bottom: 5px; }
.narrative .lead-quote {
  border-left: 3px solid var(--accent); padding: 2px 0 2px 14px; margin: 16px 0;
  font-size: 15px; color: var(--fg); font-weight: 500; line-height: 1.65;
}
.editorial-block { border-top: 1px solid var(--border); padding-top: 22px; margin-top: 22px; }
.editorial-block:first-of-type { border-top: none; margin-top: 0; padding-top: 0; }
.kind-tag {
  display: inline-flex; align-items: center; padding: 1px 7px; border-radius: 999px;
  font-size: 10.5px; font-weight: 600; letter-spacing: .03em;
  border: 1px solid var(--border); background: var(--bg-muted); color: var(--fg-subtle);
}
.kind-tag.viewpoint { color: var(--choice); border-color: color-mix(in srgb, var(--choice) 34%, transparent); background: color-mix(in srgb, var(--choice) 9%, transparent); }
.kind-tag.practice { color: var(--score); border-color: color-mix(in srgb, var(--score) 34%, transparent); background: color-mix(in srgb, var(--score) 9%, transparent); }
.kind-tag.trend { color: var(--noul); border-color: color-mix(in srgb, var(--noul) 34%, transparent); background: color-mix(in srgb, var(--noul) 9%, transparent); }

/* 首页小节标题带序号 */
.step-head { display: flex; align-items: baseline; gap: 10px; margin: 32px 0 12px; }
.step-head .n {
  display: inline-flex; align-items: center; justify-content: center;
  width: 24px; height: 24px; border-radius: 7px; flex: none;
  background: var(--fg); color: var(--bg); font-size: 12.5px; font-weight: 650;
}
.step-head h2 { font-size: 19px; margin: 0; }

/* 论文卡片 */
.pcard { display: flex; flex-direction: column; gap: 9px; }
.pcard-title { font-weight: 620; font-size: 14.5px; line-height: 1.45; letter-spacing: -.01em; overflow-wrap: anywhere; }
.pcard-meta { font-size: 11.5px; color: var(--fg-subtle); display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.pcard-abs {
  font-size: 12.5px; color: var(--fg-muted); line-height: 1.62;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
  overflow-wrap: anywhere;
}
.pcard.open .pcard-abs { -webkit-line-clamp: unset; }
.pcard-links { display: flex; gap: 8px; flex-wrap: wrap; margin-top: auto; padding-top: 4px; min-width: 0; }
.pcard-links > * { min-width: 0; max-width: 100%; }
.pcard-links a { font-size: 12px; color: var(--accent); }
.pcard-links a::after { content: " ↗"; font-size: 9px; }
.pcard-abs-toggle {
  font-size: 11.5px; color: var(--accent); background: none; border: none;
  padding: 0; cursor: pointer; font-family: inherit;
}
.topic-chip-count { opacity: .6; font-size: 10.5px; margin-left: 3px; }

/* ===========================================================================
   移动端适配
   断点：1024（平板横）、820（导航折行）、620（手机）
   =========================================================================== */
html { -webkit-text-size-adjust: 100%; }
body { overflow-x: hidden; }
/* 兜底：任何长串（抓来的英文长句、URL、模型 id）都必须能断行，否则窄屏会整页横向溢出 */
.narrative p, .prose p, .prose div, .news-title, .news-body, .pcard-title, .pcard-abs,
.mcard-desc, .detail-title p, .kv dd, .notice, .editorial-block p {
  overflow-wrap: anywhere;
}
.toolbar, .table-scroll, .tabs, .chips { overscroll-behavior-x: contain; }

/* 首屏文案随视口缩放 */
.hero-def { font-size: 16.5px; line-height: 1.8; color: var(--fg-muted); max-width: 80ch; margin-bottom: 20px; }
.hero-actions .btn { flex: 0 1 auto; }
.paper-list { grid-template-columns: 1fr; }

@media (max-width: 1024px) {
  .g4 { grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); }
  .g3 { grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); }
}

@media (max-width: 820px) {
  /* 顶栏折成两行：第一行品牌 + 主题切换，第二行可横向滚动的导航 */
  .top-inner { flex-wrap: wrap; height: auto; padding-top: 9px; padding-bottom: 0; gap: 10px 12px; }
  .brand { order: 1; }
  .top-actions { order: 2; margin-left: auto; }
  nav.main {
    order: 3; flex-basis: 100%; margin: 0 0 6px;
    overflow-x: auto; scrollbar-width: none; -webkit-overflow-scrolling: touch;
  }
  nav.main::-webkit-scrollbar { display: none; }
  nav.main a { padding: 7px 12px; font-size: 13.5px; }
  main { padding-top: 20px; }

  .wrap { padding: 0 16px; }
  .hero { padding: 26px 0 18px; }
  .hero h1 { font-size: 30px; }
  .page-head h1 { font-size: 25px; }
  .detail-title h1 { font-size: 23px; }

  /* 表格改为横向滚动，并给出可滚动的视觉提示 */
  .table-scroll { position: relative; -webkit-overflow-scrolling: touch; }
  .table-scroll table { min-width: 660px; }
  .table-scroll::after {
    content: ""; position: sticky; right: 0; float: right; width: 26px; height: 100%;
    margin-left: -26px; pointer-events: none;
    background: linear-gradient(to left, color-mix(in srgb, var(--card) 88%, transparent), transparent);
  }
  tbody td { padding: 8px 10px; }
  thead th { padding: 8px 10px; }
}

@media (max-width: 620px) {
  .wrap { padding: 0 13px; }
  .g2, .g3, .g4, .g-auto { grid-template-columns: 1fr !important; }
  .stat-row { grid-template-columns: repeat(auto-fit, minmax(104px, 1fr)); }
  .stat { padding: 11px 12px; }
  .stat b { font-size: 19px; }
  .stat span { font-size: 10.5px; }

  .hero { padding: 20px 0 14px; }
  .hero h1 { font-size: 26px; letter-spacing: -.02em; }
  .hero-def { font-size: 15px; line-height: 1.75; }
  .hero-actions .btn, .pill-row .btn { flex: 1 1 auto; justify-content: center; }
  .lead-quote { font-size: 14.5px; padding-left: 11px; }
  .narrative p { font-size: 13.5px; }
  .step-head { margin: 24px 0 10px; }
  .step-head h2 { font-size: 17px; }
  .step-head .n { width: 21px; height: 21px; font-size: 11.5px; }

  /* 筛选条在窄屏折行：切换按钮占满一行，已选条件单独一行 */
  .filter-bar { padding: 8px 10px; gap: 7px; }
  .filter-bar > .btn:first-child { flex: 1 1 auto; justify-content: center; }
  .filter-bar-right { width: 100%; margin-left: 0; justify-content: space-between; }
  .filter-chips { order: 3; flex-basis: 100%; }

  /* 触控目标放大 */
  .btn, .chip, nav.main a { min-height: 36px; }
  .chip { padding: 6px 12px; font-size: 13px; }
  input[type="search"], input[type="text"], select { padding: 9px 11px; font-size: 14px; }

  /* 首页卡片与论文卡片 */
  .card { padding: 14px; }
  .card.pad-lg { padding: 16px; }
  .pcard-abs { -webkit-line-clamp: 4; }
  .pcard-title { font-size: 14px; }
  .mcard-desc { min-height: 0; }

  /* 新闻条目：日期行独立一行 */
  .news-item { grid-template-columns: 1fr; gap: 3px; padding: 13px 0; }
  .news-date { display: flex; align-items: center; gap: 6px; }
  .news-date .tiny { margin-top: 0 !important; }

  /* 详情页 */
  .score-cell { padding: 12px 13px; }
  .score-cell .val { font-size: 19px; }
  .detail-links a { padding: 6px 10px; }
  .kv { grid-template-columns: 1fr; gap: 1px 0; }
  .kv dt { margin-top: 7px; font-size: 12px; }
  .tabs { margin-bottom: 13px; }
  .tabs button { padding: 8px 11px; font-size: 13px; }
  .pager button { min-width: 34px; min-height: 34px; }

  footer.bottom { padding: 22px 0 34px; }
  footer.bottom .cols { gap: 16px; }
  .scroll-top { right: 13px; bottom: 13px; }
}

@media (max-width: 420px) {
  .brand { font-size: 14px; }
  .hero h1 { font-size: 24px; }
  .stat-row { grid-template-columns: repeat(2, 1fr); }
  .table-scroll table { min-width: 560px; }
}