/* ==========================================================================
   辐射制冷文献检索系统 V2.0 · 公开只读站样式
   设计基调：学术、克制、可长时间阅读；白色 / 彩色 / 透明三大方向用色相区分。
   ========================================================================== */
:root {
  --bg: #f4f7fb;
  --surface: #ffffff;
  --surface-2: #fafcfe;
  --ink: #0e1a2b;
  --ink-2: #2c3b52;
  --muted: #64748b;
  --muted-2: #8595ab;
  --line: #e3e9f2;
  --line-2: #eef2f8;
  --brand: #0f766e;
  --brand-2: #14b8a6;
  --brand-soft: #e7f6f3;
  --white-accent: #2563eb;
  --color-accent: #c026d3;
  --amber: #b45309;
  --danger: #b91c1c;
  --mark: #fff2a8;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow-sm: 0 1px 2px rgba(14, 26, 43, .05);
  --shadow: 0 1px 2px rgba(14, 26, 43, .04), 0 10px 30px -12px rgba(14, 26, 43, .18);
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei",
          "PingFang SC", "Hiragino Sans GB", sans-serif;
  --mono: "JetBrains Mono", "Cascadia Mono", Consolas, "Courier New", monospace;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
a:hover { color: var(--brand); }
button { font-family: inherit; cursor: pointer; }
mark { background: var(--mark); color: inherit; padding: 0 1px; border-radius: 3px; }
::selection { background: #c7f0ea; }
:focus-visible { outline: 2px solid var(--brand-2); outline-offset: 2px; }

.skip-link {
  position: absolute; left: 12px; top: -48px; z-index: 200;
  padding: 8px 14px; background: var(--brand); color: #fff; border-radius: 8px;
}
.skip-link:focus { top: 12px; color: #fff; }

/* ── 顶栏 ───────────────────────────────────────────────────────────── */
.topbar {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; gap: 18px;
  padding: 10px 26px;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; }
.brand-mark {
  display: grid; place-items: center;
  width: 36px; height: 36px; border-radius: 11px;
  color: #eafffb;
  background: linear-gradient(135deg, #0f766e, #14b8a6 70%, #67e8f9);
  box-shadow: 0 6px 16px -6px rgba(15, 118, 110, .7);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-text strong { font-size: 16px; letter-spacing: .2px; }
.brand-text small { color: var(--muted-2); font-size: 11px; letter-spacing: .3px; }

.searchbox {
  position: relative; flex: 1 1 auto; max-width: 520px;
  display: flex; align-items: center; gap: 8px;
  padding: 0 10px 0 12px;
  height: 40px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 999px;
  transition: border-color .15s, box-shadow .15s, background .15s;
}
.searchbox:focus-within {
  background: #fff; border-color: #9fd9d1;
  box-shadow: 0 0 0 4px rgba(20, 184, 166, .12);
}
.search-ico { color: var(--muted-2); flex: 0 0 auto; }
#q, #search-input, .search-main input {
  flex: 1 1 auto; min-width: 0; border: 0; outline: 0; background: transparent;
  font-size: 13.5px; color: var(--ink); font-family: inherit;
}
#q::placeholder, .search-main input::placeholder { color: #9aa8bb; }
#q::-webkit-search-cancel-button, .search-main input::-webkit-search-cancel-button { display: none; }
.searchbox kbd {
  flex: 0 0 auto; font-family: var(--mono); font-size: 11px; color: var(--muted-2);
  border: 1px solid var(--line); border-bottom-width: 2px; border-radius: 5px;
  padding: 0 5px; line-height: 17px;
}

.nav-toggle {
  display: none; flex: 0 0 auto; width: 38px; height: 38px;
  background: #fff; border: 1px solid var(--line); border-radius: 9px;
  font-size: 16px; color: var(--ink-2);
}
.topnav { display: flex; align-items: center; gap: 3px; margin-left: auto; }
.topnav a {
  padding: 7px 9px; border-radius: 8px; font-size: 12.8px; color: var(--ink-2);
  white-space: nowrap; transition: background .15s, color .15s;
}
.topnav a:hover { background: var(--surface-2); color: var(--brand); }
.topnav a.on { background: var(--brand-soft); color: var(--brand); font-weight: 600; }
.fav-link { display: inline-flex; align-items: center; gap: 5px; margin-left: 4px; }
.pill {
  display: inline-block; min-width: 18px; padding: 0 5px;
  font-size: 11px; line-height: 17px; text-align: center;
  color: #fff; background: var(--brand); border-radius: 999px;
}

/* ── 布局 ───────────────────────────────────────────────────────────── */
.layout {
  display: grid; grid-template-columns: 262px minmax(0, 1fr);
  gap: 26px; align-items: start;
  max-width: 1360px; margin: 0 auto; padding: 22px 26px 48px;
}
.sidebar { position: sticky; top: 76px; align-self: start; }
.layout.no-sidebar { grid-template-columns: minmax(0, 1fr); max-width: 1180px; }
.main { min-height: 62vh; outline: none; }
.main:focus { outline: none; }

.side-toggle > summary {
  display: none; cursor: pointer; padding: 9px 12px; margin-bottom: 10px;
  background: var(--surface); border: 1px solid var(--line); border-radius: 10px;
  font-size: 13px; font-weight: 600; color: var(--ink-2);
}
.side-toggle > summary::after { content: "▾"; float: right; color: var(--muted-2); }
.side-toggle:not([open]) > summary::after { content: "▸"; }

.side-card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 14px 12px;
  box-shadow: var(--shadow-sm);
}
.side-card + .side-card { margin-top: 14px; }
.side-title {
  display: flex; align-items: center; justify-content: space-between;
  font-size: 12px; font-weight: 700; letter-spacing: .6px; color: var(--muted-2);
  text-transform: uppercase; padding: 2px 8px 10px;
}
.side-all {
  display: flex; align-items: center; justify-content: space-between;
  padding: 7px 10px; border-radius: 8px; font-size: 13px; color: var(--ink-2);
}
.side-all:hover { background: var(--surface-2); }
.side-all.on { background: var(--brand-soft); color: var(--brand); font-weight: 600; }
.cat-group { margin-top: 6px; }
.cat-head {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 10px; border-radius: 8px; font-size: 13.5px; font-weight: 600;
}
.cat-head:hover { background: var(--surface-2); }
.cat-head.on { color: var(--brand); background: var(--brand-soft); }
.dot { width: 8px; height: 8px; border-radius: 50%; flex: 0 0 auto; }
.dot.white { background: linear-gradient(135deg, #60a5fa, #2563eb); }
.dot.colored { background: conic-gradient(#f43f5e, #f59e0b, #22c55e, #06b6d4, #8b5cf6, #f43f5e); }
.dot.transparent { background: linear-gradient(135deg, #a5f3fc, #0891b2); }
.dot.type-dot { background: linear-gradient(135deg, #6366f1, #0ea5e9); }
.cat-head .count { margin-left: auto; font-size: 11.5px; color: var(--muted-2); font-weight: 500; }
.sub-list { margin: 2px 0 6px; padding-left: 4px; }
.sub-item {
  display: flex; align-items: center; gap: 6px;
  padding: 6px 10px 6px 24px; border-radius: 8px;
  font-size: 12.8px; color: var(--ink-2); position: relative;
}
.sub-item::before {
  content: ""; position: absolute; left: 13px; top: 50%; width: 4px; height: 4px;
  border-radius: 50%; background: #cbd5e1; transform: translateY(-50%);
}
.sub-item:hover { background: var(--surface-2); color: var(--brand); }
.sub-item.on { background: var(--brand-soft); color: var(--brand); font-weight: 600; }
.sub-item.on::before { background: var(--brand); }
.sub-item .count { margin-left: auto; color: var(--muted-2); font-size: 11.5px; }
.side-note { padding: 6px 10px 2px; font-size: 11.5px; color: var(--muted-2); line-height: 1.7; }
.side-divider { height: 1px; background: var(--line-2); margin: 10px 8px 4px; }

/* ── 通用块 ─────────────────────────────────────────────────────────── */
.crumbs { display: flex; align-items: center; gap: 8px; font-size: 12.5px; color: var(--muted); margin-bottom: 12px; flex-wrap: wrap; }
.crumbs a:hover { color: var(--brand); }
.crumbs .sep { color: #cbd5e1; }

.page-head { display: flex; align-items: flex-end; gap: 14px; flex-wrap: wrap; margin-bottom: 18px; }
.page-head h1 { margin: 0; font-size: 22px; letter-spacing: -.2px; }
.page-head .desc { flex: 1 1 320px; min-width: 220px; color: var(--muted); font-size: 12.8px; line-height: 1.7; }
.page-head .count { font-size: 12.5px; color: var(--muted); }

.toolbar {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  padding: 10px 12px; margin-bottom: 14px;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 12px; box-shadow: var(--shadow-sm);
}
.toolbar .grow { flex: 1 1 auto; }
.toolbar-note { font-size: 12px; color: var(--muted-2); }
.subnav .btn { flex: 0 0 auto; }
.field { display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; color: var(--muted); flex: 0 0 auto; }
.field input, .field select {
  height: 30px; padding: 0 8px; font-size: 12.5px; color: var(--ink-2);
  background: #fff; border: 1px solid var(--line); border-radius: 7px; outline: 0;
  font-family: inherit;
}
.field select { max-width: 208px; }
.field input:focus, .field select:focus { border-color: #9fd9d1; box-shadow: 0 0 0 3px rgba(20, 184, 166, .1); }
.field input[type="number"] { width: 68px; }
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  height: 32px; padding: 0 12px; font-size: 12.8px;
  color: var(--ink-2); background: #fff; border: 1px solid var(--line);
  border-radius: 8px; transition: all .15s; white-space: nowrap;
}
.btn:hover { border-color: #b9c6d6; background: var(--surface-2); color: var(--ink); }
.btn.primary { color: #fff; background: linear-gradient(135deg, #0f766e, #14b8a6); border-color: transparent; }
.btn.primary:hover { filter: brightness(1.05); color: #fff; }
.btn.ghost { background: transparent; border-color: transparent; color: var(--muted); }
.btn.ghost:hover { background: var(--surface-2); color: var(--ink); }
.btn.on { color: var(--brand); background: var(--brand-soft); border-color: #b9e6df; }
.btn.sm { height: 28px; padding: 0 9px; font-size: 12px; }
.btn[disabled] { opacity: .45; cursor: not-allowed; }

/* ── 首页 ───────────────────────────────────────────────────────────── */
.hero {
  position: relative; overflow: hidden;
  padding: 30px 30px 26px; margin-bottom: 16px;
  color: #eafffb;
  background:
    radial-gradient(900px 320px at 88% -40%, rgba(103, 232, 249, .35), transparent 60%),
    radial-gradient(700px 300px at 0% 120%, rgba(20, 184, 166, .35), transparent 55%),
    linear-gradient(135deg, #083f3b 0%, #0f766e 55%, #0e7490 100%);
  border-radius: 18px;
  box-shadow: 0 18px 40px -24px rgba(8, 63, 59, .8);
}
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: repeating-linear-gradient(115deg, rgba(255, 255, 255, .05) 0 1px, transparent 1px 22px);
  opacity: .5;
}
.hero h1 { position: relative; margin: 0 0 8px; font-size: 27px; letter-spacing: -.3px; }
.hero p { position: relative; margin: 0; max-width: 800px; color: #c8f2ec; font-size: 13.5px; line-height: 1.85; }
.hero .hero-tags { position: relative; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-top: 18px; }
.hero .hero-tags span { font-size: 12px; color: #9fe3da; }
.tag {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 4px 10px; font-size: 12px; border-radius: 999px;
  color: #eafffb; background: rgba(255, 255, 255, .12);
  border: 1px solid rgba(255, 255, 255, .22);
}
.tag:hover { background: rgba(255, 255, 255, .22); color: #fff; }

.infobar {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  margin-bottom: 18px; padding: 11px 14px;
  background: linear-gradient(90deg, #ecfdf5, #f0f9ff);
  border: 1px solid #cdeae4; border-radius: 12px; font-size: 12.5px; color: var(--ink-2);
}
.infobar .pulse { width: 8px; height: 8px; border-radius: 50%; background: #10b981; box-shadow: 0 0 0 4px rgba(16, 185, 129, .15); }
.infobar b { font-weight: 600; }
.infobar .sp { flex: 1 1 auto; }

.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 20px; }
.stat {
  padding: 15px 16px; background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow-sm);
}
a.stat:hover { border-color: #cfe3e0; box-shadow: var(--shadow); }
.stat .k { font-size: 12px; color: var(--muted); }
.stat .v { margin-top: 4px; font-size: 26px; font-weight: 700; letter-spacing: -.5px; line-height: 1.2; }
.stat .v small { font-size: 12px; font-weight: 500; color: var(--muted); margin-left: 4px; }
.stat .sub { margin-top: 2px; font-size: 11.5px; color: var(--muted-2); }

.cat-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 22px; }
.cat-card {
  display: block; padding: 18px 18px 14px; background: var(--surface);
  border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-sm);
  transition: transform .15s, box-shadow .15s, border-color .15s;
}
.cat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow); border-color: #cfe3e0; color: inherit; }
.cat-card .ch { display: flex; align-items: center; gap: 8px; }
.cat-card h2 { margin: 0; font-size: 16px; }
.cat-card .cc { margin-left: auto; font-size: 12px; color: var(--muted); }
.cat-card p { margin: 6px 0 12px; font-size: 12.5px; color: var(--muted); line-height: 1.7; }
.sub-bar { display: flex; align-items: center; gap: 8px; margin: 5px 0; font-size: 12px; color: var(--ink-2); }
.sub-bar .name { flex: 0 0 auto; width: 132px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sub-bar .track { flex: 1 1 auto; height: 6px; background: var(--line-2); border-radius: 999px; overflow: hidden; }
.sub-bar .fill { display: block; height: 100%; border-radius: 999px; background: linear-gradient(90deg, #14b8a6, #0ea5e9); }
.cat-card.colored .fill { background: linear-gradient(90deg, #f472b6, #f59e0b 40%, #34d399 75%, #38bdf8); }
.cat-card.transparent .fill { background: linear-gradient(90deg, #67e8f9, #0891b2); }
.sub-bar .num { flex: 0 0 auto; width: 22px; text-align: right; color: var(--muted-2); font-size: 11.5px; }

.section-title { display: flex; align-items: baseline; gap: 10px; margin: 4px 0 12px; }
.section-title h2 { margin: 0; font-size: 15.5px; }
.section-title .more { margin-left: auto; font-size: 12.5px; color: var(--brand); }
.section-title .more:hover { text-decoration: underline; }
.home-bottom { display: grid; grid-template-columns: 1.35fr 1fr; gap: 16px; }
.panel {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow-sm);
}
.latest-item { display: flex; gap: 10px; padding: 9px 0; border-bottom: 1px dashed var(--line-2); }
.latest-item:last-child { border-bottom: 0; }
.latest-item .yr { flex: 0 0 auto; font-family: var(--mono); font-size: 11.5px; color: var(--muted-2); padding-top: 2px; }
.latest-item .ti { font-size: 13px; line-height: 1.55; }
.latest-item .mj { font-size: 11.5px; color: var(--muted-2); margin-top: 2px; }
.kw-cloud { display: flex; flex-wrap: wrap; gap: 7px; }
.kw {
  padding: 3px 9px; font-size: 12px; color: var(--ink-2);
  background: var(--surface-2); border: 1px solid var(--line); border-radius: 999px;
}
.kw:hover { color: var(--brand); border-color: #b9e6df; background: var(--brand-soft); }
.kw b { font-weight: 600; color: var(--muted-2); font-size: 10.5px; margin-left: 2px; }

/* ── 文献卡片 ───────────────────────────────────────────────────────── */
.result-list { display: flex; flex-direction: column; gap: 12px; }
.paper {
  position: relative;
  padding: 15px 17px 13px;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow-sm);
  transition: border-color .15s, box-shadow .15s, transform .15s;
}
.paper:hover { border-color: #cfe3e0; box-shadow: var(--shadow); transform: translateY(-1px); }
.paper-top { display: flex; gap: 10px; align-items: flex-start; }
.paper-top .idx {
  flex: 0 0 auto; font-family: var(--mono); font-size: 11px; color: var(--muted-2);
  padding-top: 4px; width: 58px;
}
.paper-body { flex: 1 1 auto; min-width: 0; }
.paper-title { font-size: 15.5px; font-weight: 650; line-height: 1.55; color: var(--ink); }
.paper-title:hover { color: var(--brand); }
.paper-authors { margin-top: 3px; font-size: 12px; color: var(--muted); line-height: 1.5; }
.paper-title-en { margin-top: 2px; font-size: 11.8px; color: var(--muted-2); line-height: 1.5; }
.paper-meta { display: flex; align-items: center; gap: 7px; flex-wrap: wrap; margin-top: 6px; font-size: 12px; color: var(--muted); }
.paper-meta .sep { color: #cbd5e1; }
.paper-meta .jrn { color: var(--ink-2); font-weight: 500; }
.paper-meta .doi { font-family: var(--mono); font-size: 11px; }
.chip {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 1px 8px; font-size: 11px; border-radius: 999px;
  background: var(--surface-2); border: 1px solid var(--line); color: var(--ink-2);
}
a.chip:hover { color: var(--brand); border-color: #b9e6df; background: var(--brand-soft); }
.chip.cat-white { color: #1d4ed8; background: #eff6ff; border-color: #dbeafe; }
.chip.cat-colored { color: #a21caf; background: #fdf4ff; border-color: #fae8ff; }
.chip.cat-transparent { color: #0e7490; background: #ecfeff; border-color: #cffafe; }
.chip.type { color: var(--amber); background: #fffbeb; border-color: #fef3c7; }
.chip.type-academic { color: #1d4ed8; background: #eff6ff; border-color: #dbeafe; }
.chip.source { color: #0f766e; background: #ecfdf5; border-color: #a7f3d0; }
.chip.new { color: #b91c1c; background: #fef2f2; border-color: #fecaca; font-weight: 600; }
.paper-snippet { margin-top: 8px; font-size: 13px; color: var(--ink-2); line-height: 1.8; }
.paper-foot { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; margin-top: 9px; }
.paper-foot .sp { flex: 1 1 auto; }
.paper-acts { display: flex; gap: 6px; flex: 0 0 auto; }
.icon-btn {
  display: inline-grid; place-items: center; width: 30px; height: 30px;
  border: 1px solid var(--line); border-radius: 8px; background: #fff; color: var(--muted);
  font-size: 14px;
}
.icon-btn:hover { color: var(--brand); border-color: #b9e6df; background: var(--brand-soft); }
.icon-btn.on { color: #b45309; border-color: #fde68a; background: #fffbeb; }

.empty {
  padding: 46px 20px; text-align: center; color: var(--muted);
  background: var(--surface); border: 1px dashed var(--line); border-radius: var(--radius);
}
.empty h3 { margin: 0 0 6px; font-size: 15px; color: var(--ink-2); }
.empty p { margin: 0; font-size: 12.8px; }

.pager { display: flex; align-items: center; justify-content: center; gap: 6px; margin: 20px 0 6px; flex-wrap: wrap; }
.pager .pg {
  min-width: 32px; height: 32px; padding: 0 8px; display: inline-grid; place-items: center;
  font-size: 12.5px; color: var(--ink-2); background: #fff;
  border: 1px solid var(--line); border-radius: 8px;
}
.pager .pg:hover { border-color: #b9c6d6; color: var(--brand); }
.pager .pg.on { color: #fff; background: var(--brand); border-color: var(--brand); }
.pager .pg.dis { opacity: .4; pointer-events: none; }
.pager .info { margin-left: 8px; font-size: 12px; color: var(--muted-2); }

/* ── 详情页 ─────────────────────────────────────────────────────────── */
.detail { background: var(--surface); border: 1px solid var(--line); border-radius: 16px; box-shadow: var(--shadow-sm); overflow: hidden; }
.detail-head {
  padding: 22px 24px 18px;
  background: linear-gradient(180deg, #f8fdfc, #fff 70%);
  border-bottom: 1px solid var(--line-2);
}
.detail-head .kicker { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 8px; }
.detail-head h1 { margin: 0; font-size: 21px; line-height: 1.5; letter-spacing: -.2px; }
.detail-head .en { margin-top: 6px; font-size: 12.5px; color: var(--muted); line-height: 1.6; }
.detail-authors { margin-top: 6px; font-size: 12.5px; color: var(--muted); line-height: 1.7; }
.detail-body { padding: 18px 24px 22px; }
.meta-table { display: grid; grid-template-columns: 96px 1fr; gap: 8px 14px; font-size: 13px; }
.meta-table dt { color: var(--muted); }
.meta-table dd { margin: 0; color: var(--ink-2); word-break: break-word; }
.meta-table dd .mono { font-family: var(--mono); font-size: 12px; }
.block { margin-top: 20px; }
.block h3 { margin: 0 0 8px; font-size: 13.5px; display: flex; align-items: center; gap: 8px; }
.block h3::before { content: ""; width: 3px; height: 14px; border-radius: 2px; background: var(--brand); }
.block .txt { font-size: 13.5px; color: var(--ink-2); line-height: 1.9; text-align: justify; }
.muted-note { color: var(--muted); font-style: normal; }
.abstract-en { font-size: 12.5px; color: var(--muted); line-height: 1.85; }
.abstract-en.clamp { display: -webkit-box; -webkit-line-clamp: 4; -webkit-box-orient: vertical; overflow: hidden; }
.citation-box {
  font-family: var(--mono); font-size: 12.2px; line-height: 1.8;
  padding: 12px 14px; background: var(--surface-2);
  border: 1px solid var(--line-2); border-radius: 10px;
}
.detail-acts { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 18px; padding-top: 16px; border-top: 1px dashed var(--line-2); }
.rel-list { display: grid; gap: 8px; }
.rel-item { padding: 9px 12px; background: var(--surface-2); border: 1px solid var(--line-2); border-radius: 10px; font-size: 12.8px; }
.rel-item:hover { border-color: #b9e6df; background: var(--brand-soft); }
.rel-item .m { font-size: 11.5px; color: var(--muted-2); margin-top: 2px; }
.pf-meta { display: none; }

/* ── 统计页 ─────────────────────────────────────────────────────────── */
.chart-card { padding: 18px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-sm); margin-bottom: 16px; }
.chart-card h3 { margin: 0 0 14px; font-size: 14px; display: flex; align-items: center; gap: 8px; }
.chart-card h3::before { content: ""; width: 3px; height: 13px; border-radius: 2px; background: var(--brand); }
.hbar { display: grid; grid-template-columns: 150px 1fr 44px; align-items: center; gap: 10px; margin: 8px 0; font-size: 12.5px; }
.hbar .lb { color: var(--ink-2); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.hbar .tr { height: 16px; background: var(--line-2); border-radius: 5px; overflow: hidden; }
.hbar .fl { display: block; height: 100%; border-radius: 5px; background: linear-gradient(90deg, #14b8a6, #0ea5e9); }
.hbar.colored .fl { background: linear-gradient(90deg, #f472b6, #f59e0b, #34d399); }
.hbar .vv { text-align: right; font-family: var(--mono); font-size: 11.5px; color: var(--muted); }
.year-chart { display: flex; align-items: flex-end; gap: 6px; height: 172px; padding-top: 8px; }
.year-col {
  flex: 1 1 0; height: 100%; display: flex; flex-direction: column;
  justify-content: flex-end; align-items: center; gap: 4px; min-width: 0;
}
.year-col .bar { width: 100%; border-radius: 4px 4px 2px 2px; background: linear-gradient(180deg, #2dd4bf, #0f766e); min-height: 3px; }
.year-col .lb { font-size: 10px; color: var(--muted-2); font-family: var(--mono); }
.year-col:hover .bar { filter: brightness(1.1); }
table.jt { width: 100%; border-collapse: collapse; font-size: 12.5px; }
table.jt th, table.jt td { text-align: left; padding: 7px 8px; border-bottom: 1px solid var(--line-2); }
table.jt th { color: var(--muted); font-weight: 600; font-size: 11.5px; }
table.jt td.n { text-align: right; font-family: var(--mono); color: var(--muted); }

/* ── 关于页 ─────────────────────────────────────────────────────────── */
.doc { max-width: 880px; }
.doc-card { padding: 20px 24px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-sm); margin-bottom: 14px; }
.doc-card h2 { margin: 0 0 10px; font-size: 16px; }
.doc-card h3 { margin: 16px 0 6px; font-size: 13.5px; }
.doc-card p, .doc-card li { font-size: 13px; color: var(--ink-2); line-height: 1.9; }
.doc-card ul { margin: 6px 0; padding-left: 20px; }
.doc-card code { font-family: var(--mono); font-size: 12px; background: var(--surface-2); border: 1px solid var(--line); border-radius: 5px; padding: 1px 5px; }
.kbd-table { width: 100%; border-collapse: collapse; font-size: 12.8px; margin-top: 6px; }
.kbd-table td { padding: 6px 8px; border-bottom: 1px solid var(--line-2); color: var(--ink-2); }
.kbd-table td:first-child { width: 140px; }

/* ── 检索页 ─────────────────────────────────────────────────────────── */
.search-main {
  display: flex; align-items: center; gap: 10px;
  padding: 0 8px 0 16px; margin-bottom: 18px;
  height: 54px; background: var(--surface);
  border: 1px solid var(--line); border-radius: 14px;
  box-shadow: var(--shadow-sm);
  transition: border-color .15s, box-shadow .15s;
}
.search-main:focus-within { border-color: #9fd9d1; box-shadow: 0 0 0 4px rgba(20, 184, 166, .1); }
.search-main input { font-size: 15px; height: 100%; }
.search-main .btn { flex: 0 0 auto; height: 38px; padding: 0 20px; font-size: 13.5px; }

.search-layout { display: grid; grid-template-columns: 252px minmax(0, 1fr); gap: 20px; align-items: start; }
.filters { position: sticky; top: 76px; display: flex; flex-direction: column; gap: 10px; }
.filters-details > summary {
  display: none; cursor: pointer; padding: 9px 12px;
  background: var(--surface); border: 1px solid var(--line); border-radius: 10px;
  font-size: 13px; font-weight: 600;
}
.filters-details > summary::after { content: "▾"; float: right; color: var(--muted-2); }
.filters-details:not([open]) > summary::after { content: "▸"; }
.filters-body { display: flex; flex-direction: column; gap: 10px; }
.filters-loading { padding: 16px; font-size: 12.5px; color: var(--muted); }
.filter-card { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 12px 12px 10px; box-shadow: var(--shadow-sm); }
.filter-title {
  display: flex; align-items: center; justify-content: space-between;
  font-size: 11.5px; font-weight: 700; letter-spacing: .5px; color: var(--muted-2);
  text-transform: uppercase; margin-bottom: 6px;
}
.filter-title .reset { font-size: 11px; font-weight: 400; letter-spacing: 0; color: var(--brand); cursor: pointer; text-transform: none; }
.filter-row { display: flex; align-items: center; gap: 7px; padding: 5px 6px; border-radius: 7px; font-size: 12.5px; color: var(--ink-2); cursor: pointer; }
.filter-row:hover { background: var(--surface-2); }
.filter-row input { accent-color: var(--brand); margin: 0; }
.filter-row .cnt { margin-left: auto; color: var(--muted-2); font-size: 11px; font-family: var(--mono); }
.filter-select, .filter-input {
  width: 100%; height: 32px; padding: 0 8px; font-size: 12.5px; font-family: inherit;
  color: var(--ink-2); background: #fff; border: 1px solid var(--line); border-radius: 7px; outline: 0;
}
.filter-select:focus, .filter-input:focus { border-color: #9fd9d1; box-shadow: 0 0 0 3px rgba(20, 184, 166, .1); }
.year-range { display: flex; align-items: center; gap: 6px; }
.year-range input { width: 100%; min-width: 0; height: 32px; padding: 0 6px; font-size: 12.5px; border: 1px solid var(--line); border-radius: 7px; outline: 0; }
.year-range span { color: var(--muted-2); }
.kw-selected { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.kw-selected .kw { display: inline-flex; align-items: center; gap: 4px; cursor: pointer; color: var(--brand); background: var(--brand-soft); border-color: #b9e6df; }
.kw-selected .kw::after { content: "×"; font-size: 11px; opacity: .7; }
.kw-suggest { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.kw-suggest .kw { cursor: pointer; background: #fff; }
.kw-suggest .kw:hover { color: var(--brand); border-color: #b9e6df; background: var(--brand-soft); }
.search-status { font-size: 12.5px; color: var(--muted); margin-bottom: 10px; min-height: 20px; }
.search-status b { color: var(--ink-2); }
.results .toolbar { margin-bottom: 12px; }
.results .pager button.pg { font-family: inherit; cursor: pointer; }
.filters-toggle { display: none; }

/* ── 弹窗 / 提示 ────────────────────────────────────────────────────── */
.modal-mask {
  position: fixed; inset: 0; z-index: 100; display: grid; place-items: center;
  background: rgba(10, 22, 36, .45); backdrop-filter: blur(2px);
  padding: 24px; animation: fade .16s ease;
}
@keyframes fade { from { opacity: 0 } to { opacity: 1 } }
.modal {
  width: min(820px, 100%); max-height: 84vh; display: flex; flex-direction: column;
  background: #fff; border-radius: 16px; box-shadow: 0 30px 80px -30px rgba(0, 0, 0, .5);
  overflow: hidden;
}
.modal-head { display: flex; align-items: center; gap: 10px; padding: 15px 18px; border-bottom: 1px solid var(--line); }
.modal-head h3 { margin: 0; font-size: 14.5px; }
.modal-head .x { margin-left: auto; }
.modal-body { padding: 14px 18px; overflow: auto; }
.modal-foot { display: flex; gap: 8px; padding: 12px 18px; border-top: 1px solid var(--line); background: var(--surface-2); flex-wrap: wrap; }
pre.code {
  margin: 0; padding: 14px; font-family: var(--mono); font-size: 12px; line-height: 1.7;
  color: #e2e8f0; background: #0f1c2b; border-radius: 10px; overflow: auto;
  white-space: pre-wrap; word-break: break-word; max-height: 46vh;
}
.toast {
  position: fixed; left: 50%; bottom: 34px; transform: translateX(-50%);
  z-index: 120; padding: 9px 16px; font-size: 13px;
  color: #eafffb; background: rgba(15, 63, 59, .94);
  border-radius: 999px; box-shadow: 0 12px 30px -12px rgba(0, 0, 0, .5);
  animation: rise .2s ease;
}
@keyframes rise { from { opacity: 0; transform: translate(-50%, 8px) } to { opacity: 1; transform: translate(-50%, 0) } }
.loading { padding: 40px; text-align: center; color: var(--muted-2); font-size: 13px; }
.spinner {
  display: inline-block; width: 15px; height: 15px; margin-right: 8px; vertical-align: -2px;
  border: 2px solid #d7e3ea; border-top-color: var(--brand); border-radius: 50%;
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg) } }

/* ── 页脚 ───────────────────────────────────────────────────────────── */
.footer {
  max-width: 1360px; margin: 0 auto; padding: 16px 26px 26px;
  border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap;
  font-size: 11.5px; color: var(--muted);
}
.footer-dim { color: var(--muted-2); }
.footer a:hover { color: var(--brand); }

/* ── 响应式 ─────────────────────────────────────────────────────────── */
@media (max-width: 1180px) {
  .layout { grid-template-columns: 226px minmax(0, 1fr); gap: 18px; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .home-bottom { grid-template-columns: 1fr; }
  .topnav a { padding: 6px 7px; font-size: 12.2px; }
}
@media (max-width: 960px) {
  .topbar { flex-wrap: wrap; gap: 8px; padding: 10px 16px; }
  .brand-text small { display: none; }
  .nav-toggle { display: block; margin-left: auto; }
  .topnav { display: none; order: 4; flex-basis: 100%; flex-wrap: wrap; margin-left: 0; }
  .topbar.nav-open .topnav { display: flex; }
  .searchbox { order: 3; flex-basis: 100%; max-width: none; }
  .layout { grid-template-columns: 1fr; padding: 16px; }
  .sidebar { position: static; top: auto; }
  .side-toggle > summary { display: block; }
  .cat-cards { grid-template-columns: 1fr; }
  .hero h1 { font-size: 22px; }
  .paper-top .idx { display: none; }
  .meta-table { grid-template-columns: 84px 1fr; }
  .search-layout { grid-template-columns: 1fr; }
  .filters { position: static; }
  .filters-details > summary { display: block; margin-bottom: 8px; }
  .filters-body { display: none; }
  .filters-details[open] .filters-body { display: flex; }
  .search-main { height: 48px; }
  .search-main .btn { height: 34px; padding: 0 14px; }
}
@media (max-width: 560px) {
  .stat-grid { grid-template-columns: 1fr 1fr; }
  .hero { padding: 22px 18px; }
  .hero h1 { font-size: 20px; }
  .detail-head, .detail-body { padding-left: 16px; padding-right: 16px; }
  .hbar { grid-template-columns: 104px 1fr 36px; }
  .paper { padding: 13px 14px 12px; }
  .paper-title { font-size: 14.5px; }
  .page-head h1 { font-size: 19px; }
  .fav-text { display: none; }
}

@media print {
  .topbar, .sidebar, .footer, .pager, .detail-acts, .paper-acts, .search-main { display: none !important; }
  .layout { display: block; padding: 0; }
  body { background: #fff; }
}