/* 黑客书架 — 暖纸底色 + 朱砂红点缀，中文字体排印优先 */

:root {
  --bg: #faf7f1;
  --surface: #ffffff;
  --surface-2: #f2ede3;
  --text: #221c14;
  --muted: #6f665a;
  --border: #e5dccb;
  --accent: #b03a2e;
  --accent-ink: #ffffff;
  --accent-soft: #fae3dc;
  --focus: #1c7ed6;
  --tr-1: #2a78d6; --tr-2: #d9480f; --tr-3: #1baf7a; --tr-4: #b8860b; --tr-5: #c2548e;
  --mark: #ffe8a3;
  --st-r: #1a9a6c; --st-n: #b9ae9d; --st-c: #c2255c;
  --shadow: 0 1px 2px rgba(70, 45, 15, .08), 0 4px 14px rgba(70, 45, 15, .06);
  --topbar-h: 56px;
  --side-w: 240px;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --serif: "Songti SC", "Noto Serif SC", "STSong", Georgia, "Iowan Old Style", serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #171310; --surface: #201b16; --surface-2: #2a241d; --text: #eee7da; --muted: #a59a89;
    --border: #362f26; --accent: #e8694f; --accent-ink: #1c0c06; --accent-soft: #3c2419;
    --focus: #74c0fc; --tr-1: #3987e5; --tr-2: #e8683c; --tr-3: #22a97a; --tr-4: #cc9a2e; --tr-5: #d55181;
    --mark: #5c4a12; --st-r: #2fbf8a; --st-n: #6d6455; --st-c: #f06595;
    --shadow: 0 1px 2px rgba(0,0,0,.4), 0 4px 14px rgba(0,0,0,.3);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #171310; --surface: #201b16; --surface-2: #2a241d; --text: #eee7da; --muted: #a59a89;
  --border: #362f26; --accent: #e8694f; --accent-ink: #1c0c06; --accent-soft: #3c2419;
  --focus: #74c0fc; --tr-1: #3987e5; --tr-2: #e8683c; --tr-3: #22a97a; --tr-4: #cc9a2e; --tr-5: #d55181;
  --mark: #5c4a12; --st-r: #2fbf8a; --st-n: #6d6455; --st-c: #f06595;
  --shadow: 0 1px 2px rgba(0,0,0,.4), 0 4px 14px rgba(0,0,0,.3);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: calc(var(--topbar-h) + 12px); }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.65 var(--sans); overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; }
h1, h2, h3 { line-height: 1.3; margin: 0; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 4px; }
.sr-only, .skip:not(:focus) { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip:focus { position: fixed; z-index: 100; top: 8px; left: 8px; background: var(--surface); padding: 8px 12px; border-radius: 6px; }
.noscript { padding: 24px 16px; }
kbd { font: 12px ui-monospace, Menlo, monospace; background: var(--surface-2); border: 1px solid var(--border); border-bottom-width: 2px; padding: 1px 6px; border-radius: 4px; }

/* ---- 顶栏 ---- */
.topbar { position: sticky; top: 0; z-index: 30; height: var(--topbar-h); display: flex; align-items: center; gap: 8px; padding: 0 16px; background: color-mix(in srgb, var(--bg) 92%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--border); }
.icon-btn { flex: none; width: 40px; height: 40px; display: grid; place-items: center; border: 0; border-radius: 50%; background: transparent; color: var(--text); font: 600 17px var(--sans); cursor: pointer; }
.icon-btn:hover { background: var(--surface-2); }
.logo { display: flex; align-items: center; gap: 8px; flex: none; font: 700 19px var(--serif); letter-spacing: .02em; }
.logo:hover { text-decoration: none; }
.search { flex: 1; max-width: 560px; margin: 0 auto; display: flex; min-width: 0; }
.search input { flex: 1; min-width: 0; height: 38px; padding: 0 14px; font: inherit; color: var(--text); background: var(--surface); border: 1px solid var(--border); border-right: 0; border-radius: 19px 0 0 19px; }
.search input::-webkit-search-cancel-button { display: none; }
.search-btn { width: 52px; border: 1px solid var(--border); background: var(--surface-2); color: var(--text); border-radius: 0 19px 19px 0; cursor: pointer; display: grid; place-items: center; }
.i-moon { display: none; }
:root[data-theme="dark"] .i-sun { display: none; }
:root[data-theme="dark"] .i-moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .i-sun { display: none; }
  :root:not([data-theme="light"]) .i-moon { display: block; }
}

/* ---- 布局与侧栏 ---- */
.layout { display: flex; align-items: flex-start; min-height: calc(100vh - var(--topbar-h) - 120px); }
.sidebar { position: sticky; top: var(--topbar-h); flex: none; width: var(--side-w); max-height: calc(100vh - var(--topbar-h)); overflow-y: auto; padding: 16px 10px 24px; border-right: 1px solid var(--border); scrollbar-width: thin; }
.nav { list-style: none; margin: 0; padding: 0; }
.nav a { display: flex; align-items: center; gap: 10px; padding: 7px 12px; border-radius: 8px; color: var(--text); font-size: 14.5px; }
.nav a:hover { background: var(--surface-2); text-decoration: none; }
.nav a.active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.nav a svg { flex: none; width: 19px; height: 19px; }
.nav.topics a { justify-content: space-between; font-size: 13.5px; padding: 5px 12px; }
.nav.topics .count { color: var(--muted); font-size: 12px; font-variant-numeric: tabular-nums; }
.nav-h { margin: 20px 12px 6px; font: 600 12.5px/1 var(--sans); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.main, main { flex: 1; min-width: 0; padding: 24px 28px 48px; }
body.side-collapsed .sidebar { display: none; }

.scrim { display: none; }
@media (max-width: 899px) {
  .sidebar { position: fixed; z-index: 40; top: var(--topbar-h); bottom: 0; left: 0; background: var(--bg); transform: translateX(-102%); transition: transform .22s ease; box-shadow: var(--shadow); }
  body.drawer-open .sidebar { transform: none; }
  body.drawer-open .scrim { display: block; position: fixed; inset: var(--topbar-h) 0 0 0; z-index: 35; background: rgba(0,0,0,.35); }
  .main, main { padding: 18px 14px 40px; }
  .logo-text { display: none; }
  .hide-sm { display: none; }
}

/* ---- 页头 / 筛选 chips ---- */
.page-h { margin-bottom: 4px; }
.page-h h1 { font: 700 26px/1.25 var(--serif); }
.sub { color: var(--muted); margin: 6px 0 0; max-width: 70ch; }
.sub a { color: var(--accent); }
.chips { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin: 14px 0 4px; }
.chips .lbl { color: var(--muted); font-size: 13px; margin-right: 2px; }
.chip { display: inline-block; padding: 4px 12px; border: 1px solid var(--border); border-radius: 999px; background: var(--surface); font-size: 13px; color: var(--text); }
.chip:hover { text-decoration: none; border-color: var(--accent); }
.chip.on { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 600; }
.chip.topic { background: var(--accent-soft); border-color: transparent; color: var(--accent); }
.empty { padding: 32px 0; color: var(--muted); text-align: center; }
.empty h2 { font: 700 20px var(--serif); color: var(--text); margin-bottom: 8px; }
.skel { padding: 48px 0; color: var(--muted); text-align: center; }

/* ---- 书籍网格与卡片 ---- */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(148px, 1fr)); gap: 18px 14px; margin-top: 16px; }
.row { display: grid; grid-auto-flow: column; grid-auto-columns: 148px; gap: 14px; overflow-x: auto; padding: 4px 2px 10px; }
.card { display: flex; flex-direction: column; min-width: 0; }
.card:hover { text-decoration: none; }
.card:hover h3 { color: var(--accent); }
.card h3 { font: 600 14px/1.45 var(--sans); margin: 8px 0 2px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; transition: color .12s; }
.card .au { margin: 0; color: var(--muted); font-size: 12.5px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.card .rec { margin: 4px 0 0; font-size: 12px; color: var(--muted); }
.card .rec b { color: var(--text); font-variant-numeric: tabular-nums; }
.cover { position: relative; aspect-ratio: 2 / 3; width: 100%; border-radius: 6px; overflow: hidden; background: var(--surface-2); box-shadow: var(--shadow); }
.cover img { width: 100%; height: 100%; object-fit: cover; display: block; }
.badge { position: absolute; right: 0; bottom: 0; background: rgba(20, 12, 4, .72); color: #fff; font: 600 11px/1 var(--sans); padding: 4px 7px; border-radius: 6px 0 0 0; letter-spacing: .02em; font-variant-numeric: tabular-nums; }
/* 排版占位封面 */
.cover.ph { display: flex; flex-direction: column; justify-content: center; padding: 10% 9%; background: hsl(var(--h, 20), 42%, 88%); color: hsl(var(--h, 20), 45%, 26%); }
:root[data-theme="dark"] .cover.ph { background: hsl(var(--h, 20), 30%, 22%); color: hsl(var(--h, 20), 45%, 82%); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .cover.ph { background: hsl(var(--h, 20), 30%, 22%); color: hsl(var(--h, 20), 45%, 82%); } }
.ph-t { font: 700 clamp(11px, 3.2cqw, 15px)/1.3 var(--serif); display: -webkit-box; -webkit-line-clamp: 5; -webkit-box-orient: vertical; overflow: hidden; container-type: inline-size; }
.ph-rule { width: 34%; height: 3px; background: currentColor; opacity: .55; margin: 8px 0; border-radius: 2px; }
.ph-a { font-size: clamp(10px, 2.6cqw, 12px); opacity: .8; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.sentinel { padding: 20px 0 8px; color: var(--muted); font-size: 13px; text-align: center; }
.sentinel.end { padding-bottom: 0; }

/* 立场计数行（多档宽度自适应） */
.rec .rl, .rec .rm, .rec .rs, .rec .rx { display: none; }
@container card (min-width: 150px) { .rec .rl { display: inline; } }
.card { container-type: inline-size; container-name: card; }
@media (max-width: 1919px) { .rec-st .rl { display: inline !important; } }
.rec-st .rm { display: inline !important; }
@media (max-width: 399px) { .rec-st .rm { display: none !important; } .rec-st .rs { display: inline !important; } }

/* ---- 书籍详情页 ---- */
.book { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 28px; max-width: 860px; }
.book > div:first-child { align-self: start; }
.book h1 { font: 700 26px/1.3 var(--serif); }
.book .st { color: var(--muted); font-size: 15px; margin: 4px 0 0; font-style: italic; }
.book .by { margin: 8px 0 0; color: var(--muted); }
.book .by span { color: var(--muted); }
.book .by a { color: var(--accent); }
.stats { display: flex; flex-wrap: wrap; gap: 10px 28px; margin: 16px 0 4px; }
.stat b { display: block; font: 700 20px/1.2 var(--sans); font-variant-numeric: tabular-nums; }
.stat span { color: var(--muted); font-size: 12.5px; }
.stance { margin: 14px 0 0; max-width: 420px; }
.sbar { display: flex; height: 8px; border-radius: 4px; overflow: hidden; background: var(--surface-2); }
.sbar i { display: block; }
.s-r { background: var(--st-r); } .s-n { background: var(--st-n); } .s-c { background: var(--st-c); }
.slg { display: flex; flex-wrap: wrap; gap: 4px 14px; margin: 6px 0 0; font-size: 12.5px; color: var(--muted); }
.slg .dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 4px; }
.desc { margin: 14px 0 0; color: var(--text); max-width: 65ch; }
.buy-row { display: flex; align-items: center; gap: 10px; margin: 18px 0 2px; flex-wrap: wrap; }
.buy-lbl { color: var(--muted); font-size: 13px; }
.btn { display: inline-block; padding: 7px 16px; border: 1px solid var(--border); border-radius: 8px; background: var(--surface); color: var(--text); font: 500 13.5px var(--sans); cursor: pointer; }
.btn:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 600; }
.btn.primary:hover { color: var(--accent-ink); filter: brightness(1.06); }
.aff-note { color: var(--muted); font-size: 12px; margin: 4px 0 0; }
.links { display: flex; flex-wrap: wrap; gap: 10px; margin: 14px 0 0; }
.sec { margin-top: 34px; max-width: 860px; }
.sec h2 { font: 700 19px var(--serif); margin-bottom: 10px; }
.chart { width: 100%; max-width: 640px; height: auto; }
.chart text, .tr-bump text, .tr-cmpchart text { font: 11px var(--sans); fill: var(--muted); }
.chart rect.bar { fill: var(--accent); }
.chart line { stroke: var(--border); }
.chart line[stroke-dasharray] { stroke: var(--muted); }
.comments { list-style: none; margin: 0; padding: 0; }
.comment { padding: 12px 0; border-bottom: 1px solid var(--border); }
.comment-h { font-size: 12.5px; color: var(--muted); margin-bottom: 4px; }
.comment-h a { color: var(--accent); }
.comment p { margin: 0; white-space: pre-wrap; overflow-wrap: anywhere; }
.comment mark { background: var(--mark); color: inherit; padding: 0 1px; border-radius: 2px; }
.thread { font-size: 12.5px; color: var(--muted); }
.tag { display: inline-block; padding: 1px 8px; border-radius: 999px; font-size: 11.5px; font-weight: 600; }
.tag-recommends { background: color-mix(in srgb, var(--st-r) 16%, transparent); color: var(--st-r); }
.tag-mentions { background: color-mix(in srgb, var(--st-n) 22%, transparent); color: color-mix(in srgb, var(--st-n) 60%, var(--text)); }
.tag-critical { background: color-mix(in srgb, var(--st-c) 14%, transparent); color: var(--st-c); }
@media (max-width: 640px) { .book { grid-template-columns: 1fr; } .book > div:first-child { max-width: 200px; } }

/* ---- 趋势页 ---- */
.tr-sec { margin-top: 40px; max-width: 1100px; }
.tr-sec h2 { font: 700 20px var(--serif); margin-bottom: 6px; }
.tr-gh { font: 600 15px var(--sans); margin: 22px 0 2px; }
.tr-gh span { color: var(--muted); font-weight: 400; font-size: 13.5px; }
.tr-box { position: relative; border: 1px solid var(--border); border-radius: 10px; background: var(--surface); margin-top: 12px; }
.tr-scroll { overflow-x: auto; padding: 6px; }
.tr-tip { position: absolute; top: 0; left: 0; z-index: 5; pointer-events: auto; background: var(--surface); border: 1px solid var(--border); border-radius: 8px; box-shadow: var(--shadow); padding: 8px 12px; font-size: 12.5px; max-width: 300px; }
.tr-tip b { font-variant-numeric: tabular-nums; }
.tr-tip a { color: var(--accent); white-space: nowrap; }
.tr-tip .pin::after { content: ""; }
.tr-bump .bk { cursor: pointer; }
.tr-bump .bk-l { fill: none; stroke: var(--border); stroke-width: 2; }
.tr-bump .bk-d { fill: var(--surface-2); stroke: var(--muted); stroke-width: 1.4; }
.tr-bump.has-hl .bk:not(.on) { opacity: .9; }
.tr-bump .hl-l { fill: none; stroke: var(--accent); stroke-width: 2.5; }
.tr-bump .hl-d { fill: var(--accent); stroke: var(--accent); }
.tr-bump .cur { fill: none; stroke: var(--accent); stroke-width: 1.6; }
.tr-bump .tl { font: 11.5px var(--sans); fill: var(--text); }
.tr-bump .tl.top { font-weight: 700; fill: var(--accent); }
.tr-bump .hl-t { font-weight: 700; }
.tr-bump .ax { fill: var(--muted); }
.spark { width: 100%; height: auto; display: block; }
.spark .ln { fill: none; stroke: var(--accent); stroke-width: 1.8; }
.spark .ar { fill: color-mix(in srgb, var(--accent) 14%, transparent); stroke: none; }
.spark .pk { fill: var(--accent); stroke: var(--surface); stroke-width: 1.5; }
.spark line { stroke: var(--border); }
.spark-x { display: flex; justify-content: space-between; color: var(--muted); font-size: 11px; }
.tr-card .rec { color: var(--accent); }
.tr-search { position: relative; max-width: 460px; margin: 12px 0; }
.tr-search input { width: 100%; height: 40px; padding: 0 14px; font: inherit; color: var(--text); background: var(--surface); border: 1px solid var(--border); border-radius: 10px; }
.tr-search input:disabled { opacity: .55; }
#tr-list { position: absolute; z-index: 10; left: 0; right: 0; top: 44px; margin: 0; padding: 4px; list-style: none; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; box-shadow: var(--shadow); max-height: 320px; overflow-y: auto; }
#tr-list li { padding: 8px 10px; border-radius: 6px; cursor: pointer; }
#tr-list li.on, #tr-list li:hover { background: var(--accent-soft); }
#tr-list li span { color: var(--muted); font-size: 12.5px; }
#tr-list li.none { color: var(--muted); cursor: default; }
.tr-legend { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; margin: 10px 0; padding: 0; }
.tr-legend li { display: flex; align-items: center; gap: 6px; padding: 4px 10px; border: 1px solid var(--border); border-radius: 999px; background: var(--surface); font-size: 13px; }
.tr-legend .sw { width: 10px; height: 10px; border-radius: 3px; background: var(--c, var(--accent)); }
.tr-legend .x { border: 0; background: none; color: var(--muted); font-size: 15px; cursor: pointer; padding: 0 2px; }
.tr-legend .x:hover { color: var(--st-c); }
.tr-cmpchart .cl { fill: none; stroke-width: 2.2; }
.tr-cmpchart line { stroke: var(--border); }
.tr-cmpchart .vl { stroke: var(--muted); stroke-dasharray: 3 3; }
.tr-cmpchart .ax { fill: var(--muted); }
.tr-cmpchart .tl { font: 11.5px var(--sans); fill: var(--text); }
.tr-empty { padding: 40px 16px; }
.r { display: flex; align-items: center; gap: 6px; }
.r .sw { width: 9px; height: 9px; border-radius: 3px; background: var(--c); }

/* ---- 关于页 / 长文 ---- */
.prose { max-width: 72ch; }
.prose h1 { font: 700 26px/1.3 var(--serif); margin-bottom: 12px; }
.prose h2 { font: 700 19px var(--serif); margin: 26px 0 8px; }
.prose p, .prose li { color: var(--text); }
.prose a { color: var(--accent); }
.prose ol, .prose ul { padding-left: 22px; }
.prose li { margin: 6px 0; }

/* ---- 页脚 ---- */
.footer { border-top: 1px solid var(--border); padding: 22px 28px 90px; color: var(--muted); font-size: 13px; }
.foot-cols { display: flex; flex-wrap: wrap; gap: 18px 48px; max-width: 1100px; }
.foot-about { flex: 1 1 380px; max-width: 68ch; }
.foot-about p { margin: 0 0 6px; }
.foot-about a { color: var(--accent); }
.foot-brand { font: 700 15px var(--serif); color: var(--text); }
.foot-brand span { color: var(--muted); font: 400 12.5px var(--sans); margin-left: 6px; }
.foot-links { display: flex; flex-direction: column; gap: 6px; }
.foot-links a { color: var(--accent); }
#footer-meta { margin: 14px 0 0; font-size: 12px; }

/* ---- 浮动操作组（打赏 / 关注） ---- */
.fab { position: fixed; right: 18px; bottom: 18px; z-index: 25; display: flex; flex-direction: column; gap: 8px; }
.fab-btn { width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--border); background: var(--surface); color: var(--text); box-shadow: var(--shadow); cursor: pointer; display: grid; place-items: center; }
.fab-btn:hover { color: var(--accent); border-color: var(--accent); }

/* ---- 弹窗 ---- */
dialog { border: 1px solid var(--border); border-radius: 14px; background: var(--surface); color: var(--text); padding: 22px 24px; max-width: min(92vw, 380px); box-shadow: var(--shadow); }
dialog::backdrop { background: rgba(10, 6, 2, .45); }
dialog h2 { font: 700 19px var(--serif); margin: 0 0 6px; }
dialog img { display: block; margin: 12px auto; border-radius: 8px; }
.qr-note { color: var(--muted); font-size: 13.5px; margin: 0; }
.qr-links { text-align: center; font-size: 13.5px; }
.qr-links a { color: var(--accent); }
.keys { margin: 10px 0 14px; }
.keys div { display: flex; align-items: baseline; gap: 12px; margin: 7px 0; }
.keys dt { flex: none; min-width: 72px; }
.keys dd { margin: 0; color: var(--muted); font-size: 13.5px; }

@media print { .topbar, .sidebar, .fab, .footer { display: none; } }