:root {
  --bg: #f6f2ea;
  --surface: #fffdf8;
  --ink: #2a2723;
  --ink-2: #5d574e;
  --ink-3: #8c8579;
  --line: #e3dccf;
  --accent: #a8432d;
  --accent-soft: #f2e0d6;
  --blue: #2f5f8a;
  --mark: #f6dd7c;
  --shadow: 0 1px 2px rgba(60, 45, 25, .12), 0 6px 18px rgba(60, 45, 25, .10);
  --serif: "Songti SC", "Noto Serif SC", "Noto Serif CJK SC", "Source Han Serif SC", "STSong", serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --fs: 18px;
  --gutter: max(16px, env(safe-area-inset-left));
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1a1916;
    --surface: #23211d;
    --ink: #e8e2d6;
    --ink-2: #b6ae9f;
    --ink-3: #857d70;
    --line: #37332c;
    --accent: #e48b70;
    --accent-soft: #3b2a23;
    --blue: #8db7de;
    --mark: #6d5a17;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 6px 18px rgba(0, 0, 0, .35);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 120px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
img { max-width: 100%; height: auto; }
button, input, select { font: inherit; color: inherit; }
main { max-width: 1120px; margin: 0 auto; padding: 0 var(--gutter) 48px; }
h1, h2, h3 { font-weight: 600; letter-spacing: .01em; }
small { font-size: .78em; }
.muted { color: var(--ink-3); }
[hidden] { display: none !important; }

/* ---------- 顶栏 ---------- */
.topbar {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  -webkit-backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--line);
  padding-top: env(safe-area-inset-top);
}
.topbar-in {
  max-width: 1120px; margin: 0 auto; height: 56px;
  display: flex; align-items: center; gap: 16px;
  padding: 0 var(--gutter);
}
.brand {
  display: flex; align-items: center; gap: 8px;
  font: 600 17px/1 var(--serif); text-decoration: none; white-space: nowrap;
}
.brand img { border-radius: 5px; }
.topsearch { margin-left: auto; flex: 0 1 300px; }
.topsearch input, .tools input, .tools select, .find input, #q {
  width: 100%; height: 36px; padding: 0 12px;
  background: var(--surface); border: 1px solid var(--line); border-radius: 8px;
  outline: none; transition: border-color .15s;
}
.topsearch input:focus, .tools input:focus, .tools select:focus, .find input:focus, #q:focus {
  border-color: var(--accent);
}
[data-page="search"] .topsearch { visibility: hidden; }

/* ---------- 书架 ---------- */
.hero { padding: 40px 0 8px; }
.hero h1 { font: 600 34px/1.2 var(--serif); margin: 0 0 10px; }
.hero-stats { display: flex; flex-wrap: wrap; gap: 6px 22px; margin: 0; color: var(--ink-2); }
.hero-stats b { font: 600 22px/1 var(--serif); color: var(--accent); margin-right: 3px; }

.toolbar {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 12px 20px; padding: 22px 0 6px;
}
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  height: 32px; padding: 0 13px; border-radius: 16px; cursor: pointer;
  background: transparent; border: 1px solid var(--line); color: var(--ink-2);
}
.chip small { margin-left: 5px; color: var(--ink-3); }
.chip:hover { border-color: var(--ink-3); }
.chip.on { background: var(--ink); border-color: var(--ink); color: var(--bg); }
.chip.on small { color: inherit; opacity: .7; }
.tools { display: flex; gap: 8px; }
.tools input { width: 180px; }
.tools select { width: auto; padding-right: 8px; cursor: pointer; }

.year h2 {
  display: flex; align-items: baseline; gap: 12px;
  font: 600 22px/1 var(--serif); margin: 36px 0 18px;
  padding-bottom: 12px; border-bottom: 1px solid var(--line);
}
.year h2 small { font: 13px var(--sans); color: var(--ink-3); }
#flat { margin-top: 28px; }
.grid {
  display: grid; gap: 30px 22px;
  grid-template-columns: repeat(auto-fill, minmax(136px, 1fr));
}
.card { display: block; text-decoration: none; min-width: 0; }
.card h3 {
  font: 600 15px/1.4 var(--serif); margin: 12px 0 3px;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.card .by, .card .sub {
  margin: 0; font-size: 12.5px; color: var(--ink-3);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.card .by { color: var(--ink-2); }
.score { color: var(--accent); font-variant-numeric: tabular-nums; }

.cover {
  position: relative; aspect-ratio: 2 / 3; border-radius: 3px 5px 5px 3px; overflow: hidden;
  background: hsl(var(--h) 28% 42%); box-shadow: var(--shadow);
  transition: transform .2s ease, box-shadow .2s ease;
}
.cover img { width: 100%; height: 100%; object-fit: cover; display: block; }
.cover::after {                                   /* 书脊的折痕高光 */
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(90deg, rgba(0,0,0,.20) 0, rgba(255,255,255,.14) 2.5%, rgba(0,0,0,0) 6%);
}
.cover .ph {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  padding: 14px; text-align: center; color: #fff; font: 600 16px/1.5 var(--serif);
}
.badge {
  position: absolute; right: 6px; bottom: 6px; z-index: 1;
  padding: 1px 7px; border-radius: 9px; font: 600 11px/16px var(--sans);
  background: rgba(20, 16, 12, .62); color: #fff; font-variant-numeric: tabular-nums;
  backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px);
}
.card:hover .cover { transform: translateY(-4px); box-shadow: 0 10px 28px rgba(60, 45, 25, .22); }
.card:focus-visible { outline: none; }
.card:focus-visible .cover { outline: 2px solid var(--accent); outline-offset: 3px; }
.empty { padding: 40px 0; text-align: center; color: var(--ink-3); }

.offline {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  margin-top: 56px; padding: 18px 22px;
  background: var(--surface); border: 1px solid var(--line); border-radius: 10px;
}
.offline h2 { font: 600 16px/1.3 var(--serif); margin: 0 0 2px; }
.offline p { margin: 0; color: var(--ink-2); font-size: 14px; }
.btn {
  display: inline-flex; align-items: center; height: 36px; padding: 0 16px; white-space: nowrap;
  border-radius: 8px; border: 1px solid var(--accent); background: var(--accent); color: #fff;
  text-decoration: none; cursor: pointer;
}
.btn:disabled { opacity: .55; cursor: default; }
.btn-ghost { background: transparent; color: var(--accent); }

/* ---------- 书页 ---------- */
.book { max-width: 760px; margin: 0 auto; }
.crumb { padding: 22px 0 0; }
.crumb a { color: var(--ink-3); text-decoration: none; font-size: 14px; }
.crumb a:hover { color: var(--accent); }
.book-head {
  display: grid; grid-template-columns: 168px 1fr; gap: 30px; align-items: start;
  padding: 22px 0 8px;
}
.cover-lg { aspect-ratio: auto; min-height: 120px; }
.cover-lg img { height: auto; }
.cover-lg:not(:has(img)) { aspect-ratio: 2 / 3; }
.info h1 { font: 600 30px/1.3 var(--serif); margin: 4px 0 6px; }
.info .by { margin: 0 0 18px; color: var(--ink-2); font-size: 16px; }
.facts { margin: 0; display: grid; gap: 7px; }
.facts div { display: flex; gap: 14px; font-size: 15px; }
.facts dt { color: var(--ink-3); flex: none; }
.facts dd { margin: 0; }
.facts small { color: var(--ink-3); font-size: 14px; white-space: nowrap; }
.facts a { color: var(--accent); text-decoration: none; }

.summary {
  margin: 24px 0 0; padding: 16px 20px;
  background: var(--surface); border: 1px solid var(--line); border-radius: 10px;
  color: var(--ink-2); font-size: 15px; line-height: 1.8;
}
.summary h2 { font: 600 13px/1 var(--sans); color: var(--ink-3); margin: 0 0 6px; letter-spacing: .1em; }
.summary p { margin: 0; text-align: justify; }
.summary p + p { margin-top: .6em; }
.summary .body.clamped {
  max-height: 9em; overflow: hidden;
  -webkit-mask-image: linear-gradient(#000 55%, transparent); mask-image: linear-gradient(#000 55%, transparent);
}
.summary .more { margin: 6px 0 0; }

.reader-bar {
  position: sticky; top: calc(56px + env(safe-area-inset-top)); z-index: 10;
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  margin: 28px calc(-1 * var(--gutter)) 0; padding: 10px var(--gutter);
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.find { display: flex; align-items: center; gap: 6px; flex: 1 1 260px; }
.find input { flex: 1; min-width: 0; height: 34px; }
#find-count { font-size: 13px; color: var(--ink-3); white-space: nowrap; font-variant-numeric: tabular-nums; }
.reader-bar button {
  height: 34px; min-width: 34px; padding: 0 9px; cursor: pointer;
  background: var(--surface); border: 1px solid var(--line); border-radius: 8px; color: var(--ink-2);
}
.reader-bar button:hover, .prefs summary:hover { border-color: var(--ink-3); color: var(--ink); }
.prefs { position: relative; }
.prefs summary {
  list-style: none; display: flex; align-items: center; height: 34px; padding: 0 11px; cursor: pointer;
  background: var(--surface); border: 1px solid var(--line); border-radius: 8px;
  color: var(--ink-2); font: 15px/1 var(--serif); user-select: none;
}
.prefs summary::-webkit-details-marker { display: none; }
.prefs[open] summary { border-color: var(--accent); color: var(--accent); }
.prefs-pop {
  position: absolute; right: 0; top: 42px; display: flex; gap: 6px; padding: 8px;
  background: var(--surface); border: 1px solid var(--line); border-radius: 10px; box-shadow: var(--shadow);
}
.prefs-pop button { white-space: nowrap; }

.toc { margin: 18px 0 0; font-size: 14px; }
.toc summary { cursor: pointer; color: var(--ink-2); }
.toc ol { list-style: none; padding: 8px 0 0 2px; margin: 0; columns: 2; column-gap: 24px; }
.toc li { padding: 3px 0; break-inside: avoid; }
.toc li.lv3 { padding-left: 1em; }
.toc a { text-decoration: none; color: var(--ink-2); }
.toc a:hover { color: var(--accent); }

.sec > h2 {
  display: flex; align-items: baseline; gap: 10px;
  font: 600 20px/1 var(--serif); margin: 36px 0 18px;
}
.sec > h2 small { font: 13px var(--sans); color: var(--ink-3); }

.prose {
  font-family: var(--serif); font-size: var(--fs); line-height: 1.9;
  text-align: justify; overflow-wrap: anywhere;
}
:root[data-font="sans"] .prose { font-family: var(--sans); line-height: 1.85; }
.prose p { margin: 0 0 1em; }
.prose h3, .prose h4 { font-family: var(--serif); font-size: 1.15em; margin: 1.8em 0 .8em; color: var(--ink); }
.prose h4 { font-size: 1.05em; }
.prose > ol, .prose > ul, .prose details > ol { margin: 0 0 1em; padding: 0; }
.prose > ol, .prose details > ol { list-style: none; counter-reset: n; }
.prose > ol > li, .prose details > ol > li {
  counter-increment: n; position: relative;
  padding: 0 0 1.1em 2.4em; margin-bottom: 1.1em;
  border-bottom: 1px solid var(--line);
}
.prose > ol > li:last-child { border-bottom: 0; }
.prose > ol > li::before, .prose details > ol > li::before {
  content: counter(n); position: absolute; left: 0; top: .5em; width: 1.7em;
  font: 12px/1 var(--sans); color: var(--ink-3); text-align: right;
  font-variant-numeric: tabular-nums;
}
.prose ul { padding-left: 1.3em; margin: .4em 0 1em; }
.prose li li { margin: .3em 0; border: 0; padding-bottom: 0; }
.prose blockquote {
  margin: 0 0 1em; padding: .1em 0 .1em 1em; border-left: 3px solid var(--line); color: var(--ink-2);
}
.prose figure { margin: 0 0 1.2em; }
.prose figure img { display: block; border-radius: 4px; margin: 0 auto; }
.prose figcaption { font: 13px var(--sans); color: var(--ink-3); text-align: center; margin-top: 6px; }
.prose a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }
.prose code { font-size: .88em; background: var(--surface); padding: .1em .3em; border-radius: 3px; }
.prose .table { overflow-x: auto; margin: 0 0 1.2em; }
.prose table { border-collapse: collapse; font-size: .9em; line-height: 1.6; text-align: left; }
.prose th, .prose td { border: 1px solid var(--line); padding: 6px 10px; vertical-align: top; }
.prose .callout { display: flex; gap: 10px; padding: 12px 14px; background: var(--surface); border-radius: 8px; margin: 0 0 1em; }
.prose .cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 20px; }

/* Notion 的文字着色：红、蓝是划重点，其余颜色退化成同色系 */
.c-red, .c-orange, .c-pink, .c-brown { color: var(--accent); }
.c-blue, .c-purple, .c-green { color: var(--blue); }
.c-gray { color: var(--ink-3); }
.c-yellow { color: #a17a12; }
[class$="-bg"] { background: var(--accent-soft); border-radius: 2px; padding: 0 .1em; }

mark.hit { background: var(--mark); color: inherit; border-radius: 2px; }
mark.hit.cur { outline: 2px solid var(--accent); outline-offset: 1px; }
.flash { animation: flash 2.4s ease-out; }
@keyframes flash { 0%, 30% { background: var(--accent-soft); } 100% { background: transparent; } }

.related h2, .pager { font-family: var(--serif); }
.related h2 { font-size: 18px; margin: 40px 0 12px; }
.related ul { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.related li a, .related li span {
  display: inline-block; padding: 6px 14px; border: 1px solid var(--line); border-radius: 18px;
  text-decoration: none; font-size: 15px; background: var(--surface);
}
.related li a:hover { border-color: var(--accent); color: var(--accent); }
.related li span { color: var(--ink-3); }

.pager {
  display: grid; grid-template-columns: 1fr 1fr; gap: 14px;
  margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--line);
}
.pager a {
  display: block; padding: 12px 16px; border: 1px solid var(--line); border-radius: 10px;
  text-decoration: none; font-size: 16px; background: var(--surface);
}
.pager a:hover { border-color: var(--accent); }
.pager small { display: block; font: 12px var(--sans); color: var(--ink-3); margin-bottom: 4px; }
.pager .older { text-align: right; grid-column: 2; }

/* ---------- 搜索 ---------- */
.search { max-width: 820px; margin: 0 auto; padding-top: 32px; }
#q { height: 48px; font-size: 18px; padding: 0 16px; border-radius: 10px; }
#sstat { margin: 12px 2px 0; font-size: 14px; }
.r-sec h2 { font: 600 13px/1 var(--sans); color: var(--ink-3); letter-spacing: .08em; margin: 30px 0 12px; }
.r-books { display: flex; flex-wrap: wrap; gap: 8px; }
.r-books a {
  display: inline-flex; align-items: baseline; gap: 8px; padding: 7px 14px;
  border: 1px solid var(--line); border-radius: 18px; background: var(--surface);
  text-decoration: none; font-family: var(--serif);
}
.r-books a small { font-family: var(--sans); color: var(--ink-3); }
.r-books a:hover { border-color: var(--accent); }
.r-group {
  margin: 0 0 16px; padding: 14px 18px 8px;
  background: var(--surface); border: 1px solid var(--line); border-radius: 10px;
}
.r-group header { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; margin-bottom: 4px; }
.r-group header a { font: 600 17px/1.4 var(--serif); text-decoration: none; }
.r-group header a:hover { color: var(--accent); }
.r-group header span { font-size: 13px; color: var(--ink-3); }
.r-group header .n { margin-left: auto; }
.r-group ol { list-style: none; margin: 0; padding: 0; }
.r-group li { border-top: 1px dashed var(--line); }
.r-group li:first-child { border-top: 0; }
.r-group li a {
  display: block; padding: 9px 0; text-decoration: none;
  font: 15.5px/1.8 var(--serif); color: var(--ink-2);
}
.r-group li a:hover { color: var(--ink); }
.r-group mark { background: var(--mark); color: var(--ink); border-radius: 2px; padding: 0 1px; }
.more {
  margin: 4px 0 8px; padding: 0; border: 0; background: none; cursor: pointer;
  color: var(--accent); font-size: 14px;
}

.notice { max-width: 520px; margin: 0 auto; padding: 80px 0; text-align: center; }
.notice h1 { font: 600 26px/1.3 var(--serif); }
.notice p { color: var(--ink-2); }

.foot {
  max-width: 1120px; margin: 0 auto; padding: 24px var(--gutter) calc(32px + env(safe-area-inset-bottom));
  border-top: 1px solid var(--line); color: var(--ink-3); font-size: 13px; text-align: center;
}
.foot p { margin: 0; }

/* ---------- 窄屏 ---------- */
@media (max-width: 640px) {
  .topbar-in { gap: 12px; }
  .topsearch { flex: 1 1 auto; }
  .hero { padding-top: 26px; }
  .hero h1 { font-size: 28px; }
  .toolbar { flex-direction: column; flex-wrap: nowrap; align-items: stretch; }
  .chips, .tools { min-width: 0; }
  .chips { flex-wrap: nowrap; overflow-x: auto; margin: 0 calc(-1 * var(--gutter)); padding: 0 var(--gutter); scrollbar-width: none; }
  .chips::-webkit-scrollbar { display: none; }
  .chip { flex: none; }
  .tools input { flex: 1; width: auto; min-width: 0; }
  .grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px 14px; }
  .card h3 { font-size: 14px; margin-top: 9px; }
  .card .sub { display: none; }
  .offline { flex-direction: column; align-items: stretch; }
  .book-head { grid-template-columns: 104px 1fr; gap: 18px; padding-top: 16px; }
  .info h1 { font-size: 22px; }
  .info .by { margin-bottom: 12px; font-size: 14px; }
  .facts div { font-size: 14px; gap: 10px; }
  .find { flex-basis: 0; }
  .toc ol { columns: 1; }
  .prose > ol > li, .prose details > ol > li { padding-left: 2em; }
  .pager { grid-template-columns: 1fr; }
  .pager .older { grid-column: 1; }
}