/* ── 超新施工工艺百科全书 · 移动端知识库 ───────────────────────── */
:root{
  --paper:#F7F5F0;
  --paper-2:#F1EEE6;
  --card:#FFFFFF;
  --ink:#1F1F1F;
  --ink-2:#5C5A54;
  --ink-3:#8E8A80;
  --green:#2F4F3E;
  --green-soft:#4A6B58;
  --sand:#C8B99C;
  --clay:#A6503C;
  --line:rgba(31,31,31,.09);
  --line-2:rgba(31,31,31,.055);
  --shadow:0 1px 2px rgba(47,79,62,.05),0 8px 24px -12px rgba(47,79,62,.18);
  --fs:17px;
  --fs-sm:13px;
  --fs-xs:11px;
  --r:12px;
  --bar:52px;
  --ease:cubic-bezier(.22,.8,.24,1);
  --serif:"Songti SC","Songti TC","Noto Serif CJK SC","Noto Serif SC","Source Han Serif SC",serif;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","MiSans","Microsoft YaHei",system-ui,sans-serif;

  /* 九大分类：大地色系同族渐变，明度递进 */
  --c1:#E4DFD1; --c2:#D9DCCD; --c3:#CCD6C7;
  --c4:#BFCFC1; --c5:#B2C7BB; --c6:#A5BEB5;
  --c7:#97B5AE; --c8:#89ABA7; --c9:#7BA0A0;
  --cat-fg:#22362B;
}
@media (prefers-color-scheme:dark){
  :root{
    --paper:#141715;
    --paper-2:#191D1A;
    --card:#1C211E;
    --ink:#EDEAE3;
    --ink-2:#A9A79F;
    --ink-3:#77756D;
    --green:#8FB2A0;
    --green-soft:#A6C3B3;
    --sand:#B5A488;
    --clay:#CE8570;
    --line:rgba(237,234,227,.1);
    --line-2:rgba(237,234,227,.055);
    --shadow:0 1px 2px rgba(0,0,0,.3),0 10px 28px -14px rgba(0,0,0,.6);
    --c1:#2A3129; --c2:#2C3630; --c3:#2E3B35;
    --c4:#30403A; --c5:#32453F; --c6:#344A44;
    --c7:#364F49; --c8:#38544E; --c9:#3A5953;
    --cat-fg:#E7E4DC;
  }
}
html[data-theme="light"]{color-scheme:light}
html[data-theme="dark"]{
  color-scheme:dark;
  --paper:#141715;--paper-2:#191D1A;--card:#1C211E;--ink:#EDEAE3;--ink-2:#A9A79F;--ink-3:#77756D;
  --green:#8FB2A0;--green-soft:#A6C3B3;--sand:#B5A488;--clay:#CE8570;
  --line:rgba(237,234,227,.1);--line-2:rgba(237,234,227,.055);
  --shadow:0 1px 2px rgba(0,0,0,.3),0 10px 28px -14px rgba(0,0,0,.6);
  --c1:#2A3129;--c2:#2C3630;--c3:#2E3B35;--c4:#30403A;--c5:#32453F;
  --c6:#344A44;--c7:#364F49;--c8:#38544E;--c9:#3A5953;--cat-fg:#E7E4DC;
}
html[data-theme="dark"] .cat-card .cc-c,
html[data-theme="dark"] .cat-card .cc-n{opacity:1}
@media (prefers-color-scheme:dark){
  .cat-card .cc-c{opacity:.78}
}

*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0;height:100%}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:var(--fs);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overscroll-behavior-y:none;
}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
img{display:block}
::selection{background:var(--sand);color:#1F1F1F}

/* 启动遮罩 */
.boot{
  position:fixed;inset:0;z-index:200;display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:18px;
  background:var(--paper);transition:opacity .4s var(--ease),visibility .4s;
}
.boot.hide{opacity:0;visibility:hidden}
.boot-mark{
  width:56px;height:56px;border-radius:50%;background:var(--green);color:#F7F5F0;
  font-family:var(--serif);font-size:26px;line-height:56px;text-align:center;
  animation:breathe 2s var(--ease) infinite;
}
@keyframes breathe{0%,100%{transform:scale(1);opacity:.92}50%{transform:scale(1.06);opacity:1}}
.boot-txt{font-size:var(--fs-sm);color:var(--ink-3);letter-spacing:.14em}

/* ── 通用 ─────────────────────────────────── */
.wrap{max-width:560px;margin:0 auto;padding:0 20px}
.pad-b{height:calc(28px + env(safe-area-inset-bottom))}
.topbar{
  position:sticky;top:0;z-index:60;height:var(--bar);
  display:flex;align-items:center;gap:10px;padding:0 8px 0 6px;
  background:color-mix(in srgb,var(--paper) 86%,transparent);
  backdrop-filter:saturate(1.4) blur(14px);-webkit-backdrop-filter:saturate(1.4) blur(14px);
  border-bottom:1px solid transparent;transition:border-color .2s;
}
.topbar.scrolled{border-bottom-color:var(--line-2)}
.tb-btn{
  width:44px;height:44px;display:grid;place-items:center;border-radius:50%;
  color:var(--ink);flex:none;transition:background .18s;
}
.tb-btn:active{background:var(--line-2)}
.tb-title{
  flex:1;min-width:0;font-family:var(--serif);font-size:16px;font-weight:600;letter-spacing:.04em;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.tb-btn svg{width:21px;height:21px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.tb-btn.on{color:var(--clay)}

.sec-label{
  display:flex;align-items:center;gap:9px;margin:34px 0 13px;
}
.sec-label h2{
  margin:0;font-family:var(--serif);font-size:19px;font-weight:600;letter-spacing:.05em;
  display:flex;align-items:center;gap:8px;
}
/* 朱砂小方印分区标 */
.sec-label h2::before{content:"";width:7px;height:7px;background:var(--clay);border-radius:2px;flex:none}
.sec-label span{font-size:var(--fs-xs);color:var(--ink-3);letter-spacing:.16em}
.sec-label .rule{flex:1;height:1px;background:var(--line-2);transform:translateY(-3px)}
.grp-h{
  margin:16px 2px 10px;font-size:var(--fs-xs);color:var(--green);
  letter-spacing:.18em;font-weight:600;display:flex;align-items:center;gap:7px;
}
.grp-h::before{content:"";width:12px;height:1px;background:currentColor;display:block;opacity:.55}

/* ── 首页 ─────────────────────────────────── */
.hero{padding:30px 20px 8px;max-width:560px;margin:0 auto;position:relative}
/* 工程方格纸点阵，往下半透明淡出 */
.hero::before{
  content:"";position:absolute;inset:8px 8px 0;pointer-events:none;
  background-image:radial-gradient(var(--line-2) 1px,transparent 1.4px);
  background-size:16px 16px;
  -webkit-mask-image:linear-gradient(#000 60%,transparent);
  mask-image:linear-gradient(#000 60%,transparent);
}
.hero-kicker{
  display:flex;align-items:center;gap:8px;
  font-size:var(--fs-xs);letter-spacing:.22em;color:var(--green);text-transform:uppercase;
}
.hero-kicker i{width:18px;height:1px;background:var(--green);display:block;opacity:.5}
.hero h1{
  margin:14px 0 6px;font-family:var(--serif);font-weight:600;
  font-size:33px;line-height:1.26;letter-spacing:.02em;
}
/* 标题末尾一枚朱砂小方印，呼应封面 */
.hero h1::after{
  content:"";display:inline-block;width:.2em;height:.2em;margin-left:.16em;
  background:var(--clay);border-radius:2px;transform:translateY(-.1em);
}
.hero p{margin:0;font-size:var(--fs-sm);color:var(--ink-2);line-height:1.75;letter-spacing:.02em}
.hero-stats{display:flex;gap:26px;margin-top:20px;padding-bottom:2px}
.stat b{
  display:block;font-family:var(--serif);font-size:26px;line-height:1.1;font-weight:600;
  font-variant-numeric:tabular-nums;
}
.stat span{font-size:var(--fs-xs);color:var(--ink-3);letter-spacing:.14em}

.search-entry{
  display:flex;align-items:center;gap:10px;width:100%;
  margin:20px 0 0;padding:0 16px;height:52px;border-radius:14px;
  background:var(--card);border:1px solid var(--line);box-shadow:var(--shadow);
  color:var(--ink-2);font-size:14.5px;letter-spacing:.02em;
}
.search-entry:active{transform:scale(.995)}
.search-entry svg{width:18px;height:18px;stroke:var(--green);fill:none;stroke-width:1.8;flex:none}
.search-entry kbd{
  margin-left:auto;font-family:var(--sans);font-size:var(--fs-xs);color:var(--ink-3);
  border:1px solid var(--line);border-radius:5px;padding:1px 6px;
}

.cat-grid{
  display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:4px;
}
.cat-card{
  position:relative;display:block;border-radius:14px;overflow:hidden;
  padding:15px 14px 13px;min-height:112px;
  background:var(--c1);color:var(--cat-fg);
  transition:transform .18s var(--ease),box-shadow .18s;
}
/* 左上高光，让色块有一层"釉面" */
.cat-card::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(155deg,rgba(255,255,255,.34),rgba(255,255,255,0) 52%);
}
/* 右上角首字大水印 */
.cat-card::after{
  content:attr(data-ch);position:absolute;right:0;top:-10px;pointer-events:none;
  font-family:var(--serif);font-size:74px;line-height:1;font-weight:600;opacity:.09;
}
.cat-card:active{transform:scale(.975)}
.cat-card .cc-thumb{
  position:absolute;right:-10px;bottom:-10px;width:76px;height:76px;border-radius:50%;
  overflow:hidden;opacity:.4;filter:saturate(.8);
}
.cat-card .cc-thumb img{width:100%;height:100%;object-fit:cover}
.cat-card .cc-n{
  position:relative;font-family:var(--serif);font-size:18px;font-weight:600;letter-spacing:.03em;
  line-height:1.3;max-width:6.4em;
}
.cat-card .cc-c{
  position:relative;margin-top:7px;font-size:var(--fs-xs);letter-spacing:.14em;opacity:.68;
  font-variant-numeric:tabular-nums;
}
.cat-card .cc-bar{
  position:absolute;left:0;top:0;width:3px;height:100%;background:rgba(31,49,39,.15);
}
.cat-card.c1{background:var(--c1)}.cat-card.c2{background:var(--c2)}.cat-card.c3{background:var(--c3)}
.cat-card.c4{background:var(--c4)}.cat-card.c5{background:var(--c5)}.cat-card.c6{background:var(--c6)}
.cat-card.c7{background:var(--c7)}.cat-card.c8{background:var(--c8)}.cat-card.c9{background:var(--c9)}
/* 深色模式下高光收敛，避免色块发灰 */
html[data-theme="dark"] .cat-card::before{
  background:linear-gradient(155deg,rgba(255,255,255,.07),rgba(255,255,255,0) 52%);
}
@media (prefers-color-scheme:dark){
  html:not([data-theme="light"]) .cat-card::before{
    background:linear-gradient(155deg,rgba(255,255,255,.07),rgba(255,255,255,0) 52%);
  }
}

.quick{display:grid;grid-template-columns:1fr 1fr 1fr;gap:10px;margin-top:10px}
.quick a{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:7px;
  height:76px;border-radius:14px;background:var(--card);border:1px solid var(--line);
  font-size:var(--fs-sm);color:var(--ink-2);letter-spacing:.04em;
  transition:transform .18s var(--ease);
}
.quick a:active{transform:scale(.97);background:var(--paper-2)}
.quick svg{width:21px;height:21px;stroke:var(--green);fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}

/* ── 书架（三联精装封面） ─────────────────── */
.shelf{display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px;margin-top:4px}
.book-card{display:block;min-width:0}
.book-card .bc-cover{
  aspect-ratio:3/4;border-radius:10px;overflow:hidden;background:var(--paper-2);
  box-shadow:0 2px 4px rgba(47,79,62,.14),0 14px 26px -12px rgba(47,79,62,.34);
  transition:transform .18s var(--ease),box-shadow .18s;
}
.book-card:active .bc-cover{transform:scale(.965)}
.book-card .bc-cover img{width:100%;height:100%;object-fit:cover;display:block}
.book-card .bc-cap{
  margin-top:7px;text-align:center;font-size:var(--fs-xs);color:var(--ink-3);
  letter-spacing:.12em;font-variant-numeric:tabular-nums;
}

/* ── 书页头 ───────────────────────────────── */
.book-hero{display:flex;gap:16px;padding:16px 0 2px;align-items:flex-start}
.bh-cover{
  width:98px;flex:none;aspect-ratio:3/4;border-radius:9px;overflow:hidden;background:var(--paper-2);
  box-shadow:0 2px 4px rgba(47,79,62,.16),0 12px 24px -12px rgba(47,79,62,.36);
}
.bh-cover img{width:100%;height:100%;object-fit:cover;display:block}
.bh-info{flex:1;min-width:0}
.bh-info h1{
  margin:8px 0 6px;font-family:var(--serif);font-size:24px;line-height:1.3;
  font-weight:600;letter-spacing:.02em;
}
.bh-info p{margin:0;font-size:var(--fs-sm);color:var(--ink-2);line-height:1.7}
.bh-meta{display:flex;gap:8px;margin-top:10px;flex-wrap:wrap}

/* ── 列表 ─────────────────────────────────── */
.list{margin-top:4px}
.row{
  display:flex;gap:13px;padding:14px 0;border-bottom:1px solid var(--line-2);
  align-items:center;transition:opacity .2s;
}
.row:active{opacity:.62}
.row-thumb{
  width:86px;height:64px;border-radius:10px;overflow:hidden;flex:none;
  background:var(--paper-2);border:1px solid var(--line-2);
}
.row-thumb img{width:100%;height:100%;object-fit:cover}
.row-body{flex:1;min-width:0}
.row-t{
  font-size:15.5px;font-weight:600;line-height:1.45;color:var(--ink);letter-spacing:.01em;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.row-m{
  margin-top:6px;font-size:var(--fs-xs);color:var(--ink-3);letter-spacing:.06em;
  display:flex;gap:8px;align-items:center;font-variant-numeric:tabular-nums;
}
.row-m .dot{width:2px;height:2px;border-radius:50%;background:var(--ink-3);display:block}
.row-m mark{background:transparent;color:var(--clay);font-weight:600}
.sentinel{height:1px}

/* ── 详情 ─────────────────────────────────── */
.detail{padding-top:6px}
.crumb{
  display:flex;align-items:center;gap:7px;font-size:var(--fs-xs);
  letter-spacing:.14em;color:var(--clay);text-transform:none;
}
.crumb i{width:14px;height:1px;background:currentColor;display:block;opacity:.5}
.detail h1{
  margin:10px 0 0;font-family:var(--serif);font-size:27px;line-height:1.38;
  font-weight:600;letter-spacing:.01em;
}
.detail .meta{
  margin-top:10px;display:flex;align-items:center;gap:9px;flex-wrap:wrap;
  font-size:var(--fs-xs);color:var(--ink-3);letter-spacing:.08em;
}
.tag{
  display:inline-block;padding:3px 9px;border-radius:999px;background:var(--paper-2);
  border:1px solid var(--line-2);color:var(--ink-2);font-size:var(--fs-xs);letter-spacing:.06em;
}
.seg{
  display:inline-flex;padding:3px;border-radius:999px;background:var(--paper-2);
  border:1px solid var(--line-2);margin-left:auto;
}
.seg button{
  position:relative;
  padding:4px 12px;border-radius:999px;font-size:var(--fs-xs);color:var(--ink-2);
  letter-spacing:.06em;transition:background .2s,color .2s;
}
/* 视觉尺寸不变，把点击热区扩到 44px 以上 */
.seg button::after{
  content:"";position:absolute;inset:-11px -8px;
}
.seg button.on{background:var(--card);color:var(--ink);box-shadow:0 1px 2px rgba(0,0,0,.06)}

.para{
  margin:16px 0 0;font-size:var(--fs);line-height:1.92;color:var(--ink);
  text-align:justify;letter-spacing:.012em;word-break:break-word;
}
.para:first-of-type{margin-top:20px}
.divider{height:1px;background:var(--line-2);margin:26px 0 0}

/* 要点区：方格纸点阵底 + 朱砂左标 */
.tips{
  margin-top:18px;border-radius:var(--r);padding:16px 16px 6px;position:relative;overflow:hidden;
  background-color:var(--paper-2);
  background-image:radial-gradient(var(--line) 1px,transparent 1.4px);
  background-size:14px 14px;
}
.tips::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--clay);opacity:.75}
.tips-h{
  display:flex;align-items:center;gap:8px;margin:0 0 10px;
  font-size:var(--fs-xs);letter-spacing:.2em;color:var(--clay);font-weight:600;
}
.tips-h i{width:16px;height:1px;background:currentColor;display:block;opacity:.6}
.tips ul{margin:0;padding:0;list-style:none}
.tips li{
  position:relative;padding:0 0 12px 16px;font-size:calc(var(--fs) - 1px);
  line-height:1.8;color:var(--ink);letter-spacing:.012em;
}
.tips li::before{
  content:"";position:absolute;left:0;top:.72em;width:5px;height:5px;
  border-radius:50%;background:var(--sand);
}
.tips li:last-child{padding-bottom:12px}

.figs{margin-top:22px;display:flex;flex-direction:column;gap:11px}
.fig{border-radius:8px;overflow:hidden;border:1px solid var(--line-2);background:var(--paper-2);position:relative}
.fig img{width:100%;height:auto;display:block}
.fig .zoom{
  position:absolute;right:8px;bottom:8px;width:30px;height:30px;border-radius:50%;
  background:rgba(20,23,21,.55);color:#fff;display:grid;place-items:center;
  backdrop-filter:blur(4px);opacity:.9;
}
.fig .zoom svg{width:15px;height:15px;stroke:currentColor;fill:none;stroke-width:2}
.annots{
  margin-top:14px;padding:12px 14px;border-radius:10px;border:1px dashed var(--line);
  background-color:var(--paper-2);
  background-image:radial-gradient(var(--line-2) 1px,transparent 1.4px);
  background-size:14px 14px;
}
.annots-h{font-size:var(--fs-xs);letter-spacing:.16em;color:var(--ink-3);margin-bottom:7px}
.annots ul{margin:0;padding:0;list-style:none;display:grid;grid-template-columns:1fr;gap:5px}
.annots li{position:relative;padding-left:12px;font-size:var(--fs-sm);line-height:1.6;color:var(--ink-2)}
.annots li::before{content:"";position:absolute;left:0;top:.66em;width:4px;height:4px;border-radius:50%;background:var(--sand)}
.figcap{margin-top:7px;font-size:var(--fs-xs);color:var(--ink-3);letter-spacing:.06em;text-align:center}
.fig.has-note{background:var(--paper-2)}

.note{
  margin-top:20px;padding:12px 14px;border-radius:10px;background:var(--card);
  border:1px solid var(--line);font-size:var(--fs-sm);color:var(--ink-2);line-height:1.7;
}
.note b{color:var(--ink);font-weight:600;font-size:var(--fs-xs);letter-spacing:.1em;
  display:block;margin-bottom:4px;color:var(--ink-3)}

.pager{display:flex;gap:10px;margin-top:26px}
.pager a{
  flex:1;padding:13px 14px;border-radius:var(--r);background:var(--card);
  border:1px solid var(--line);font-size:var(--fs-sm);color:var(--ink-2);
  display:flex;flex-direction:column;gap:3px;transition:transform .18s var(--ease);min-width:0;
}
.pager a:active{transform:scale(.98)}
.pager a span{font-size:var(--fs-xs);color:var(--ink-3);letter-spacing:.1em}
.pager a b{
  font-family:var(--serif);font-weight:600;font-size:14.5px;letter-spacing:.02em;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--ink);
}
.pager a.next{text-align:right;align-items:flex-end}

.pageview{margin-top:18px}
.pageview img{width:100%;height:auto;border-radius:8px;border:1px solid var(--line-2)}
.pageview .cap{margin-top:8px;font-size:var(--fs-xs);color:var(--ink-3);text-align:center;letter-spacing:.06em}

.empty{padding:70px 20px;text-align:center;color:var(--ink-3);font-size:var(--fs-sm);line-height:2}
.empty b{display:block;font-family:var(--serif);font-size:19px;color:var(--ink);margin-bottom:6px}

/* ── 搜索 ─────────────────────────────────── */
.searchbar{
  position:sticky;top:0;z-index:60;display:flex;align-items:center;gap:8px;
  padding:6px 8px 6px 6px;height:var(--bar);
  background:color-mix(in srgb,var(--paper) 88%,transparent);
  backdrop-filter:saturate(1.4) blur(14px);-webkit-backdrop-filter:saturate(1.4) blur(14px);
  border-bottom:1px solid var(--line-2);
}
.search-field{
  flex:1;display:flex;align-items:center;gap:9px;height:40px;padding:0 12px;
  border-radius:10px;background:var(--card);border:1px solid var(--line);
}
.search-field svg{width:17px;height:17px;stroke:var(--ink-3);fill:none;stroke-width:1.9;flex:none}
.search-field input{
  flex:1;border:0;outline:0;background:transparent;color:var(--ink);
  font-size:15px;font-family:var(--sans);min-width:0;
  -webkit-appearance:none;appearance:none;border-radius:0;
}
.search-field input::-webkit-search-cancel-button{-webkit-appearance:none}
.search-field input::placeholder{color:var(--ink-3)}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin-top:16px}
.chip{
  padding:6px 13px;border-radius:999px;background:var(--card);border:1px solid var(--line);
  font-size:var(--fs-sm);color:var(--ink-2);transition:background .15s;
}
.chip:active{background:var(--paper-2)}
.hit{display:flex;gap:12px;padding:15px 0 14px;border-bottom:1px solid var(--line-2)}
.hit:active{opacity:.62}
.hit-thumb{
  width:64px;height:50px;border-radius:8px;overflow:hidden;flex:none;
  background:var(--paper-2);border:1px solid var(--line-2);
}
.hit-thumb img{width:100%;height:100%;object-fit:cover}
.hit-body{flex:1;min-width:0}
.hit .h-cat{font-size:var(--fs-xs);color:var(--clay);letter-spacing:.1em;margin-bottom:3px}
.hit .h-t{margin-top:4px;font-size:15.5px;font-weight:600;line-height:1.45;letter-spacing:.01em}
.hit .h-x{margin-top:6px;font-size:var(--fs-sm);color:var(--ink-2);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.hit mark{background:rgba(200,185,156,.42);color:inherit;border-radius:2px;padding:0 1px;font-weight:600}

/* ── 灯箱 ─────────────────────────────────── */
.lb{position:fixed;inset:0;z-index:300;background:#0C0E0D;display:flex;flex-direction:column}
.lb[hidden]{display:none}
.lb-bar{
  position:absolute;top:0;left:0;right:0;z-index:5;height:calc(50px + env(safe-area-inset-top));
  padding:env(safe-area-inset-top) 10px 0;display:flex;align-items:center;justify-content:space-between;
  background:linear-gradient(rgba(0,0,0,.55),transparent);
}
.lb-count{color:rgba(255,255,255,.8);font-size:var(--fs-xs);letter-spacing:.12em;padding-left:8px}
.lb-close{width:42px;height:42px;color:#fff;font-size:17px}
.lb-stage{
  flex:1;display:flex;align-items:center;justify-content:center;overflow:hidden;
  touch-action:none;user-select:none;
}
.lb-stage img{max-width:100%;max-height:100%;will-change:transform;transition:transform .16s var(--ease)}
.lb-hint{
  position:absolute;bottom:calc(18px + env(safe-area-inset-bottom));left:0;right:0;text-align:center;
  color:rgba(255,255,255,.42);font-size:var(--fs-xs);letter-spacing:.1em;
}

/* ── 设置面板 ─────────────────────────────── */
.mask{position:fixed;inset:0;z-index:120;background:rgba(10,12,11,.36);opacity:0;transition:opacity .24s}
.mask.on{opacity:1}
.sheet{
  position:fixed;left:0;right:0;bottom:0;z-index:130;background:var(--paper);
  border-radius:18px 18px 0 0;padding:8px 20px calc(24px + env(safe-area-inset-bottom));
  transform:translateY(102%);transition:transform .3s var(--ease);
  box-shadow:0 -8px 40px -12px rgba(0,0,0,.28);
}
.sheet.on{transform:translateY(0)}
.sheet .grab{width:36px;height:4px;border-radius:2px;background:var(--line);margin:4px auto 16px}
.sheet h3{
  margin:0 0 14px;font-family:var(--serif);font-size:17px;font-weight:600;
  display:flex;align-items:center;gap:8px;
}
.sheet h3::before{content:"";width:7px;height:7px;background:var(--clay);border-radius:2px}
.set-row{display:flex;align-items:center;justify-content:space-between;padding:13px 0;border-top:1px solid var(--line-2)}
.set-row .lb2{font-size:14px;color:var(--ink)}
.opts{display:flex;gap:6px}
.opts button{
  padding:6px 13px;border-radius:8px;font-size:var(--fs-sm);color:var(--ink-2);
  background:var(--paper-2);border:1px solid transparent;transition:.18s;
}
.opts button.on{background:var(--green);color:#fff;border-color:var(--green)}

/* 视图切换动画 */
.view-enter{animation:vin .24s var(--ease) both}
@keyframes vin{from{opacity:0}to{opacity:1}}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms !important;transition-duration:.01ms !important}
}

/* ── 首页页脚（卷首入口） ─────────────────── */
.foot{
  margin:26px 0 4px;text-align:center;font-size:var(--fs-xs);color:var(--ink-3);
  letter-spacing:.06em;display:flex;align-items:center;justify-content:center;
  gap:8px;flex-wrap:wrap;
}
.foot a{color:var(--ink-2);border-bottom:1px solid var(--line-2);padding-bottom:1px}
.foot .dot{width:2px;height:2px;border-radius:50%;background:var(--ink-3);display:block}

/* ── 面包屑可点 ───────────────────────────── */
.crumb{flex-wrap:nowrap;overflow:hidden}
.crumb a{
  color:inherit;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:8em;
}
.crumb a:last-of-type{max-width:7.6em}
.crumb .bmark{color:var(--green);font-weight:600;white-space:nowrap}
.row-m .bmark{color:var(--green);font-weight:600}

/* ── 施工控制要点（编号规则） ───────────────── */
.rules-h{
  display:flex;align-items:center;gap:8px;margin:22px 0 3px;
  font-size:var(--fs-xs);letter-spacing:.2em;color:var(--green);font-weight:600;
}
.rules-h i{width:16px;height:1px;background:currentColor;display:block;opacity:.6}
.rules{margin:12px 0 0;padding:0;list-style:none;counter-reset:r}
.rules li{
  position:relative;padding:0 0 13px 28px;font-size:var(--fs);line-height:1.86;
  letter-spacing:.012em;word-break:break-word;
}
.rules li::before{
  counter-increment:r;content:counter(r);
  position:absolute;left:0;top:.32em;width:19px;height:19px;border-radius:50%;
  background:color-mix(in srgb,var(--green) 10%,transparent);
  border:1px solid color-mix(in srgb,var(--green) 32%,transparent);
  color:var(--green);
  font-size:10.5px;line-height:17px;text-align:center;font-weight:600;font-family:var(--sans);
}

/* 深色下编号圆点提亮，否则暗底暗字看不清 */
html[data-theme="dark"] .rules li::before{
  background:color-mix(in srgb,var(--green) 18%,transparent);
  border-color:color-mix(in srgb,var(--green) 48%,transparent);
}
@media (prefers-color-scheme:dark){
  html:not([data-theme="light"]) .rules li::before{
    background:color-mix(in srgb,var(--green) 18%,transparent);
    border-color:color-mix(in srgb,var(--green) 48%,transparent);
  }
}

/* ── 照片题注 ─────────────────────────────── */
.fig .fc{
  padding:8px 10px;font-size:var(--fs-xs);color:var(--ink-2);letter-spacing:.04em;
  background:var(--paper-2);border-top:1px solid var(--line-2);
}