/* Compendium · 阅读器外壳样式
   视觉方向：浅色、克制、像一座资料馆——细线、方角、左对齐的大字标题；不用金边、皮革和骰子。 */
:root {
  --fs: 17px;
  --measure: min(58rem, 85%);
  --side-w: 300px;
  --out-w: 230px;
  --top-h: 52px;
  --sans: "Microsoft YaHei UI", "PingFang SC", "Noto Sans SC", "Source Han Sans SC", system-ui, sans-serif;
  --latin: Georgia, "Times New Roman", serif;
  --mono: "Cascadia Mono", "Consolas", "SFMono-Regular", Menlo, monospace;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.6 var(--sans);
  -webkit-tap-highlight-color: transparent;
}
button { font: inherit; color: inherit; cursor: pointer; }
a { color: inherit; }
kbd { font: 11px/1 var(--mono); padding: 3px 6px; border-radius: 4px; border: 1px solid var(--line-2); color: var(--ink-soft); background: var(--paper); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
[hidden] { display: none !important; }

/* ---------- 整体布局 ---------- */
.app {
  display: grid;
  grid-template-columns: var(--side-w) minmax(0, 1fr) var(--out-w);
  grid-template-rows: var(--top-h) minmax(0, 1fr);
  height: 100vh; height: 100dvh;
}
.app.no-outline { --out-w: 0px; }
.app.no-outline .outline { display: none; }

/* ---------- 顶栏：浅色细条，下面一条发丝线；阅读进度是线上的一段主题色 ---------- */
.topbar {
  grid-column: 1 / -1;
  display: flex; align-items: center; gap: 10px;
  padding: 0 14px 0 12px;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  position: relative; z-index: 30;
}
.topbar::after {
  content: ""; position: absolute; left: 0; bottom: -1px; height: 2px; width: calc(var(--prog, 0) * 100%);
  background: var(--accent); transition: width .12s linear;
}
.icon-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  min-width: 36px; height: 36px; padding: 0 9px;
  background: transparent; border: 1px solid transparent; border-radius: 8px;
  color: var(--ink-soft); font-size: 13px;
}
.icon-btn:hover { background: var(--paper-2); color: var(--ink); border-color: var(--line); }
.icon-btn.on, .icon-btn[aria-pressed="true"] { color: var(--accent); }
.icon-btn svg { width: 19px; height: 19px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.icon-btn .star-on { fill: currentColor; }
#btnMenu { display: none; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; margin-right: 4px; }
.brand .logo { width: 30px; height: 30px; flex: none; }
.brand b { display: block; font: italic 700 19px/1.1 var(--latin); letter-spacing: -.01em; color: var(--ink); }
.brand small { display: block; margin-top: 1px; font-size: 10.5px; color: var(--ink-soft); letter-spacing: .14em; }
.searchbtn {
  flex: 1; max-width: 520px; margin: 0 auto 0 18px;
  display: flex; align-items: center; gap: 9px; height: 36px; padding: 0 10px 0 12px;
  background: var(--paper-2); border: 1px solid var(--line); border-radius: 8px;
  color: var(--ink-soft); text-align: left;
}
.searchbtn:hover { border-color: var(--accent); background: var(--paper); }
.searchbtn span { flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.searchbtn svg { width: 17px; height: 17px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; }
.tools { display: flex; align-items: center; gap: 2px; margin-left: auto; position: relative; }

/* 弹出面板：外观设置 */
.pop {
  position: absolute; top: 44px; right: 0; width: 290px; padding: 14px;
  background: var(--card); color: var(--ink); border: 1px solid var(--line-2); border-radius: 10px;
  box-shadow: var(--shadow); z-index: 60;
}
.pop h4 { margin: 0 0 8px; font: 700 12px var(--sans); color: var(--ink-soft); letter-spacing: .12em; }
.pop .row { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
.pop .row:last-child { margin-bottom: 0; }
.chip { padding: 5px 11px; border-radius: 6px; background: var(--paper); border: 1px solid var(--line-2); font-size: 13px; }
.chip:hover { border-color: var(--accent); }
.chip.on { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.pop input[type=range] { width: 100%; accent-color: var(--accent); }

/* ---------- 侧栏：浅底，分段标签，细线缩进 ---------- */
.side {
  grid-row: 2; display: flex; flex-direction: column; min-height: 0;
  background: var(--side); border-right: 1px solid var(--line);
  position: relative; z-index: 20;
}
.tabs { display: flex; gap: 2px; margin: 12px 12px 0; padding: 3px; background: var(--paper-2); border: 1px solid var(--line); border-radius: 9px; }
.tab { flex: 1; height: 28px; border: 0; border-radius: 6px; background: transparent; color: var(--ink-soft); font-size: 13px; letter-spacing: .06em; }
.tab:hover { color: var(--ink); }
.tab.on { background: var(--card); color: var(--accent); font-weight: 700; box-shadow: 0 1px 2px rgba(0, 0, 0, .12), 0 0 0 1px var(--line); }
.side-head { padding: 10px 12px 6px; }
.side-head.off { display: none; }
.side-head input {
  width: 100%; height: 34px; padding: 0 11px; border-radius: 7px;
  background: var(--paper); border: 1px solid var(--line-2); color: var(--ink);
  font: inherit; font-size: 14px;
}
.side-head input::placeholder { color: var(--ink-soft); }
.side-head input:focus { outline: none; border-color: var(--accent); }
.tree { flex: 1; overflow: auto; padding: 4px 8px 24px; scrollbar-width: thin; scrollbar-color: var(--line-2) transparent; }
.tree::-webkit-scrollbar { width: 8px; }
.tree::-webkit-scrollbar-thumb { background: var(--line-2); border-radius: 4px; }
.nrow {
  display: flex; align-items: center; gap: 4px; min-height: 30px; padding: 1px 8px 1px 2px;
  border-radius: 6px; cursor: pointer; position: relative; user-select: none;
  color: var(--ink); text-decoration: none;
}
.nrow:hover { background: var(--paper-2); }
.nrow.active { background: color-mix(in srgb, var(--accent) 11%, transparent); color: var(--accent); }
.nrow.active::before { content: ""; position: absolute; left: -8px; top: 5px; bottom: 5px; width: 3px; border-radius: 0 3px 3px 0; background: var(--accent); }
.caret { flex: none; width: 20px; height: 20px; display: grid; place-items: center; border-radius: 5px; color: var(--ink-soft); }
.caret::before { content: ""; width: 5px; height: 5px; border-right: 1.6px solid currentColor; border-bottom: 1.6px solid currentColor; transform: rotate(-45deg); transition: transform .15s; }
.tn.open > .nrow > .caret::before { transform: rotate(45deg); }
.caret.none::before { display: none; }
.caret:hover { background: var(--line); }
.nico { flex: none; width: 15px; height: 15px; fill: none; stroke: var(--ink-soft); stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.nrow.active .nico { stroke: var(--accent); }
.lbl { flex: 1; min-width: 0; font-size: 13.5px; line-height: 1.35; padding: 3px 0; overflow-wrap: anywhere; }
.nrow.miss { cursor: default; }
.nrow.miss .lbl { opacity: .45; text-decoration: line-through; }
.tg { display: inline-block; margin-left: 6px; padding: 0 5px; font: 600 10px/16px var(--sans); border-radius: 3px; vertical-align: 1px; letter-spacing: .04em; white-space: nowrap; }
.tg-new { background: var(--accent); color: var(--on-accent); }
.tg-old { border: 1px solid var(--line-2); color: var(--ink-soft); }
.tg-inc { border: 1px solid var(--hl); color: var(--hl); }
.kids { margin-left: 10px; padding-left: 6px; border-left: 1px solid var(--line); }
.tn:not(.open) > .kids { display: none; }
.sep { margin: 16px 8px 4px; padding: 0 0 4px; font: 700 11px var(--sans); letter-spacing: .2em; color: var(--ink-soft); border-bottom: 1px solid var(--line); }
.sep.plain { height: 1px; padding: 0; margin: 8px 10px; background: var(--line); border: 0; }
.frow .path { display: block; font-size: 11px; color: var(--ink-soft); }
.emptytip { padding: 26px 14px; text-align: center; color: var(--ink-soft); font-size: 13px; line-height: 1.8; }
.nrow .x { flex: none; width: 24px; height: 24px; border-radius: 5px; border: 0; background: transparent; color: var(--ink-soft); opacity: 0; }
.nrow:hover .x { opacity: 1; }
.nrow .x:hover { background: var(--line); color: var(--ink); }
.side-foot { padding: 8px 14px 10px; font-size: 11px; color: var(--ink-soft); border-top: 1px solid var(--line); letter-spacing: .03em; }

/* ---------- 主区 ---------- */
.main { grid-row: 2; display: flex; flex-direction: column; min-width: 0; min-height: 0; background: var(--paper); position: relative; }
.crumbs {
  flex: none; display: flex; align-items: center; gap: 2px; flex-wrap: nowrap; overflow-x: auto; white-space: nowrap;
  padding: 0 18px; min-height: 38px; border-bottom: 1px solid var(--line);
  font-size: 12.5px; color: var(--ink-soft); scrollbar-width: none;
}
.crumbs::-webkit-scrollbar { display: none; }
.crumbs a { text-decoration: none; padding: 3px 6px; border-radius: 5px; }
.crumbs a:hover { background: var(--paper-2); color: var(--accent); }
.crumbs .sep-c { opacity: .5; font-family: var(--mono); }
.crumbs .here { color: var(--ink); font-weight: 700; padding: 3px 6px; }
.crumbs .sp { flex: 1; }
iframe#view { flex: 1; width: 100%; min-height: 0; border: 0; background: var(--paper); display: block; }
.pager { flex: none; display: flex; gap: 10px; padding: 8px 12px; border-top: 1px solid var(--line); background: var(--paper); }
.pager button {
  flex: 1; min-width: 0; display: flex; flex-direction: column; justify-content: center; gap: 1px;
  padding: 6px 14px; background: var(--paper); border: 1px solid var(--line); border-radius: 8px; text-align: left; color: var(--ink);
}
.pager button + button { text-align: right; }
.pager button:hover:not(:disabled) { border-color: var(--accent); }
.pager button:disabled { opacity: .35; cursor: default; }
.pager small { font-size: 11px; color: var(--ink-soft); letter-spacing: .06em; }
.pager b { font-size: 13px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* 搜索命中条 */
.hlbar {
  position: absolute; left: 50%; bottom: 70px; transform: translateX(-50%); z-index: 15;
  display: flex; align-items: center; gap: 6px; padding: 5px 7px 5px 14px;
  background: var(--ink); color: var(--paper); border-radius: 999px; box-shadow: var(--shadow); font-size: 13px;
}
.hlbar button { width: 26px; height: 26px; border-radius: 50%; border: 0; background: color-mix(in srgb, var(--paper) 18%, transparent); color: inherit; }
.hlbar button:hover { background: color-mix(in srgb, var(--paper) 32%, transparent); }

/* ---------- 本页目录 ---------- */
.outline { grid-row: 2; overflow: auto; padding: 18px 12px 30px 8px; background: var(--paper); border-left: 1px solid var(--line); font-size: 12.5px; }
.outline h5 { margin: 0 0 8px 10px; font: 700 11px var(--sans); letter-spacing: .18em; color: var(--ink-soft); }
.outline a { display: block; padding: 3px 10px; margin: 1px 0; color: var(--ink-soft); text-decoration: none; border-left: 2px solid var(--line); line-height: 1.45; }
.outline a:hover { color: var(--ink); border-left-color: var(--line-2); }
.outline a.l3 { padding-left: 20px; }
.outline a.l4 { padding-left: 30px; font-size: 12px; }
.outline a.l5 { padding-left: 40px; font-size: 12px; }
.outline a.on { color: var(--accent); border-left-color: var(--accent); font-weight: 700; }

/* ---------- 首页：馆藏门厅 ---------- */
.home { flex: 1; overflow: auto; min-height: 0; background: var(--paper); }
.main:not(.is-home) .home { display: none; }
.is-home iframe#view, .is-home .pager, .is-home .hlbar { display: none; }
.is-home .crumbs { display: none; }

.mast { position: relative; overflow: hidden; background: var(--paper-2); border-bottom: 1px solid var(--line); }
.mast::before {   /* 网格 */
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 34px 34px; opacity: .55;
  -webkit-mask-image: linear-gradient(100deg, transparent 20%, #000 90%); mask-image: linear-gradient(100deg, transparent 20%, #000 90%);
}
.mast::after {    /* 同心圆 */
  content: ""; position: absolute; right: -150px; top: -190px; width: 640px; height: 640px; border-radius: 50%; pointer-events: none;
  background: repeating-radial-gradient(circle, transparent 0 26px, color-mix(in srgb, var(--accent) 24%, transparent) 26px 27px);
  -webkit-mask-image: radial-gradient(circle, #000 25%, transparent 70%); mask-image: radial-gradient(circle, #000 25%, transparent 70%);
}
.mast-in { position: relative; z-index: 1; max-width: 1080px; margin: 0 auto; padding: 56px 28px 40px; }
.eyebrow { margin: 0 0 14px; font: 600 12px var(--mono); letter-spacing: .22em; color: var(--accent); text-transform: uppercase; }
.mast h1 { display: flex; align-items: baseline; flex-wrap: wrap; gap: 8px 18px; margin: 0 0 14px; line-height: 1; }
.mast h1 .w1 { font: italic 700 clamp(46px, 8.4vw, 88px)/1 var(--latin); letter-spacing: -.025em; color: var(--ink); }
.mast h1 .w2 { font: 800 clamp(16px, 2.4vw, 24px)/1 var(--sans); letter-spacing: .34em; padding: .45em .5em .45em .85em; background: var(--accent); color: var(--on-accent); border-radius: 4px; transform: translateY(-.5em); }
.lede { margin: 0; max-width: 34em; color: var(--ink-soft); font-size: 15px; line-height: 1.8; }
.bigsearch {
  display: flex; align-items: center; gap: 12px; width: min(620px, 100%); margin: 28px 0 0; height: 54px; padding: 0 16px;
  background: var(--card); color: var(--ink-soft); border: 1px solid var(--line-2); border-bottom: 3px solid var(--accent); border-radius: 8px 8px 4px 4px;
  font-size: 16px; text-align: left; box-shadow: var(--shadow);
}
.bigsearch:hover { border-color: var(--accent); }
.bigsearch svg { width: 20px; height: 20px; fill: none; stroke: var(--accent); stroke-width: 2; stroke-linecap: round; }
.bigsearch span { flex: 1; }
.stats { display: flex; flex-wrap: wrap; gap: 8px 36px; margin: 30px 0 0; padding: 0; }
.stats div { min-width: 0; }
.stats dt { font: 700 26px/1.1 var(--mono); letter-spacing: -.02em; color: var(--ink); }
.stats dd { margin: 3px 0 0; font-size: 12px; letter-spacing: .12em; color: var(--ink-soft); }

.wrap { max-width: 1080px; margin: 0 auto; padding: 34px 28px 70px; }
.sec { margin-top: 38px; }
.sec:first-child { margin-top: 0; }
.sec > h2 { display: flex; align-items: baseline; gap: 12px; margin: 0 0 16px; font: 800 19px var(--sans); letter-spacing: .06em; color: var(--ink); }
.sec > h2 .no { font: 600 12px var(--mono); color: var(--accent); letter-spacing: .08em; }
.sec > h2::after { content: ""; flex: 1; height: 1px; background: var(--line-2); align-self: center; }
.sec > h2 small { font: 12px var(--sans); color: var(--ink-soft); letter-spacing: .04em; order: 3; }
.sec > h2::after { order: 2; }

.toolgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 12px; }
.tool {
  position: relative; display: flex; flex-direction: column; gap: 4px; padding: 14px 16px 14px 18px; text-decoration: none;
  background: var(--card); border: 1px solid var(--line); border-left: 4px solid var(--accent); border-radius: 4px 8px 8px 4px;
  transition: border-color .15s, transform .15s, box-shadow .15s;
}
.tool:hover { border-color: var(--accent); transform: translateY(-1px); box-shadow: var(--shadow); }
.tool b { font-size: 15.5px; }
.tool small { color: var(--ink-soft); font-size: 12.5px; line-height: 1.55; }
.tool .arr { position: absolute; right: 14px; top: 14px; color: var(--ink-soft); font-family: var(--mono); }
.tool:hover .arr { color: var(--accent); }
.tool .tg { margin: 0 0 0 8px; }
.listing { display: flex; flex-wrap: wrap; gap: 8px; }
.pill { padding: 6px 12px; border-radius: 6px; background: var(--card); border: 1px solid var(--line); text-decoration: none; font-size: 13px; max-width: 100%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pill:hover { border-color: var(--accent); color: var(--accent); }
.pill b { color: var(--accent); }

.catalog { columns: 2 440px; column-gap: 44px; }
.grp { break-inside: avoid; margin: 0 0 26px; }
.grp h3 { display: flex; align-items: center; gap: 10px; margin: 0 0 6px; font: 700 12px var(--sans); letter-spacing: .22em; color: var(--accent); text-transform: uppercase; }
.grp h3::after { content: ""; flex: 1; height: 1px; background: var(--line-2); }
.idx { list-style: none; margin: 0; padding: 0; }
.idx a { display: flex; align-items: baseline; gap: 8px; padding: 5px 6px; margin: 0 -6px; border-radius: 5px; text-decoration: none; font-size: 14.5px; }
.idx a:hover { background: var(--paper-2); color: var(--accent); }
.idx .nm { min-width: 0; }
.idx .lead { flex: 1; min-width: 14px; border-bottom: 1px dotted var(--line-2); transform: translateY(-3px); }
.idx .ct { flex: none; font: 12px var(--mono); color: var(--ink-soft); }
.idx .tg { margin-left: 0; }
.foot { margin-top: 48px; padding-top: 18px; border-top: 1px solid var(--line-2); font-size: 12.5px; color: var(--ink-soft); line-height: 1.95; }
.foot a { color: var(--accent); }

/* ---------- 搜索弹窗 ---------- */
.sm { position: fixed; inset: 0; z-index: 100; display: flex; justify-content: center; align-items: flex-start; padding: 8vh 14px 0; background: rgba(10, 12, 20, .5); backdrop-filter: blur(2px); }
.sm-box { width: min(720px, 100%); max-height: 80vh; display: flex; flex-direction: column; background: var(--card); color: var(--ink); border: 1px solid var(--line-2); border-radius: 10px; box-shadow: 0 24px 70px rgba(0, 0, 0, .4); overflow: hidden; }
.sm-in { display: flex; align-items: center; gap: 10px; padding: 0 16px; height: 56px; border-bottom: 1px solid var(--line); }
.sm-in svg { width: 19px; height: 19px; fill: none; stroke: var(--accent); stroke-width: 2; stroke-linecap: round; flex: none; }
.sm-in input { flex: 1; height: 100%; border: 0; background: transparent; color: inherit; font: 17px var(--sans); outline: none; min-width: 0; }
.sm-res { flex: 1; overflow: auto; padding: 8px; min-height: 80px; }
.sm-h { padding: 10px 10px 4px; font: 700 11px var(--sans); letter-spacing: .16em; color: var(--ink-soft); display: flex; justify-content: space-between; align-items: center; }
.sm-it { display: block; width: 100%; text-align: left; padding: 8px 12px; border: 0; border-left: 3px solid transparent; border-radius: 4px 8px 8px 4px; background: transparent; color: inherit; text-decoration: none; }
.sm-it.sel, .sm-it:hover { background: var(--paper-2); border-left-color: var(--accent); }
.sm-it b { display: block; font-size: 15px; }
.sm-it .ctx { display: block; font-size: 12px; color: var(--ink-soft); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sm-it .snip { display: block; margin-top: 2px; font-size: 13px; color: var(--ink-soft); line-height: 1.55; }
.sm-it mark { background: color-mix(in srgb, var(--hl) 45%, transparent); color: inherit; border-radius: 3px; padding: 0 1px; }
.sm-empty { padding: 26px 16px; text-align: center; color: var(--ink-soft); font-size: 14px; }
.sm-ft { display: flex; align-items: center; gap: 10px; margin: 6px; padding: 10px 12px; border: 1px dashed var(--accent); border-radius: 6px; background: transparent; color: var(--accent); text-align: left; font-size: 14px; width: calc(100% - 12px); }
.sm-ft:hover { background: var(--paper-2); }
.bar { height: 3px; border-radius: 2px; background: var(--line); overflow: hidden; margin: 6px 12px; }
.bar i { display: block; height: 100%; width: 0; background: var(--accent); transition: width .2s; }
.sm-foot { display: flex; gap: 16px; padding: 8px 16px; font-size: 12px; color: var(--ink-soft); border-top: 1px solid var(--line); background: var(--paper-2); }
.sm-opts { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; padding: 8px 14px; border-bottom: 1px solid var(--line); background: var(--paper-2); }
.sm-opts .chip[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.sm-opts .hint { font-size: 12px; color: var(--ink-soft); }
.sm-sub { font-size: 12px; color: var(--ink-soft); }

.dot { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-right: 6px; vertical-align: -1px; box-shadow: 0 0 0 1px rgba(0, 0, 0, .2) inset; }
/* 设置面板里的示例文字：随字号滑块实时变化 */
.pop .sample { margin: 2px 0 8px; padding: 8px 10px; border-radius: 6px; background: var(--paper-2); border: 1px solid var(--line); font: var(--fs)/1.6 var(--sans); color: var(--ink); }
.pop .note { margin: 0; font-size: 12px; color: var(--ink-soft); line-height: 1.6; }

.scrim { display: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1180px) {
  .app { grid-template-columns: var(--side-w) minmax(0, 1fr); }
  .outline { position: fixed; top: var(--top-h); right: 0; bottom: 0; width: min(86vw, 320px); z-index: 40; display: none; box-shadow: var(--shadow); }
  .app.out-open .outline { display: block; }
  .app.no-outline .outline { display: none; }
  .app.no-outline.out-open .outline { display: block; }
}
@media (max-width: 860px) {
  .app { grid-template-columns: minmax(0, 1fr); }
  #btnMenu { display: inline-flex; }
  .side { position: fixed; top: var(--top-h); left: 0; bottom: 0; width: min(88vw, 360px); transform: translateX(-102%); transition: transform .22s ease; box-shadow: var(--shadow); }
  .app.side-open .side { transform: none; }
  .app.side-open .scrim { display: block; position: fixed; inset: var(--top-h) 0 0 0; z-index: 15; background: rgba(0, 0, 0, .45); }
  .brand small, .searchbtn kbd, .hide-m { display: none; }
  .brand b { white-space: nowrap; font-size: 17px; }
  .searchbtn { min-width: 0; margin-left: 4px; }
  .crumbs { padding: 0 10px; }
  .mast-in { padding: 34px 18px 28px; }
  .wrap { padding: 24px 16px 54px; }
  .catalog { columns: 1; }
  .sm { padding-top: 3vh; }
}
@media (max-width: 520px) {
  .brand span { display: none; }
  .tools { margin-left: 0; }
  .stats { gap: 8px 26px; }
  .stats dt { font-size: 22px; }
}
/* 手机窄屏：正文本来就铺满屏幕，没有“宽/窄”可选，隐藏正文宽度设置 */
@media (max-width: 640px) { .pop .hide-s { display: none; } }
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}