/* 《道德经》· 五千言 —— 通用样式
   宣纸 · 玄墨 · 朱砂 · 黛青 */
:root{
  --paper:#f6f1e6;
  --paper-2:#fbf8f1;
  --paper-3:#efe8d8;
  --ink:#1f1c18;
  --ink-2:#4a443c;
  --ink-3:#7a7266;
  --line:#ddd3bd;
  --cinnabar:#a4342b;
  --cinnabar-soft:#c25a4c;
  --dai:#3f5d60;
  --gold:#a98348;
  --shadow:0 1px 2px rgba(60,50,30,.06),0 8px 24px rgba(60,50,30,.08);
  --shadow-lg:0 2px 6px rgba(60,50,30,.08),0 18px 48px rgba(60,50,30,.12);
  --radius:14px;
  --serif:"Songti SC","STSong","Source Han Serif SC","Noto Serif SC","SimSun",serif;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --maxw:1180px;
}
html[data-theme="dark"]{
  --paper:#15171a;
  --paper-2:#1c1f23;
  --paper-3:#23272c;
  --ink:#e8e3d8;
  --ink-2:#bdb6a8;
  --ink-3:#8d8677;
  --line:#33383e;
  --cinnabar:#d0705f;
  --cinnabar-soft:#b9584a;
  --dai:#7fb0b3;
  --gold:#c9a86a;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.35);
}
html[data-theme="dark"] .topbar{background:#15171a}
html[data-theme="dark"] .tabbar{background:#15171a}
html[data-theme="dark"]{
  --shadow-lg:0 2px 6px rgba(0,0,0,.35),0 18px 48px rgba(0,0,0,.45);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
body{
  font-family:var(--sans);
  background:var(--paper);
  color:var(--ink);
  line-height:1.75;
  font-size:16px;
  background-image:
    radial-gradient(circle at 12% 8%, rgba(168,132,72,.07), transparent 42%),
    radial-gradient(circle at 88% 4%, rgba(63,93,96,.06), transparent 38%),
    radial-gradient(circle at 50% 100%, rgba(164,52,43,.05), transparent 45%);
  background-attachment:fixed;
  transition:background-color .3s,color .3s;
}
a{color:inherit;text-decoration:none}
button{font-family:inherit;font-size:inherit;cursor:pointer}
input,textarea{font-family:inherit;font-size:inherit;color:inherit}
::selection{background:rgba(164,52,43,.2)}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}

/* ---------- 顶部导航 ---------- */
.topbar{
  position:sticky;top:0;z-index:50;
  background:var(--paper);
  background:rgba(246,241,230,.92);
  backdrop-filter:saturate(1.4) blur(12px);
  border-bottom:1px solid var(--line);
}
.topbar .wrap{display:flex;align-items:center;gap:18px;height:60px}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--serif);font-size:20px;font-weight:700;letter-spacing:.06em}
.brand .seal{
  width:32px;height:32px;border-radius:6px;background:var(--cinnabar);color:#fff;
  display:grid;place-items:center;font-size:17px;box-shadow:0 2px 8px rgba(164,52,43,.35)
}
.brand small{display:block;font-size:10px;font-weight:400;letter-spacing:.18em;color:var(--ink-3);font-family:var(--sans)}
.nav{display:flex;gap:4px;margin-left:auto;align-items:center}
.nav a{
  padding:7px 13px;border-radius:9px;font-size:14.5px;color:var(--ink-2);
  transition:.18s;white-space:nowrap
}
.nav a:hover{background:var(--paper-3);color:var(--ink)}
.nav a.on{background:var(--ink);color:var(--paper);font-weight:600}
.icon-btn{
  width:34px;height:34px;border-radius:9px;border:1px solid var(--line);
  background:var(--paper-2);display:grid;place-items:center;font-size:15px;color:var(--ink-2);
  transition:.18s
}
.icon-btn:hover{border-color:var(--cinnabar);color:var(--cinnabar)}
.menu-toggle{display:none}

/* ---------- 底部移动导航 ---------- */
.tabbar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:60;
  background:var(--paper);
  backdrop-filter:blur(14px);border-top:1px solid var(--line);
  padding:6px 4px calc(6px + env(safe-area-inset-bottom));
}
.tabbar a{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;padding:4px 0;font-size:11px;color:var(--ink-3)}
.tabbar a .ti{font-size:18px;line-height:1}
.tabbar a.on{color:var(--cinnabar);font-weight:700}

/* ---------- 通用 ---------- */
main{padding:26px 0 60px;min-height:60vh}
h1,h2,h3,h4{font-family:var(--serif);font-weight:700;margin:0}
.page-title{font-size:26px;letter-spacing:.04em;display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.page-sub{color:var(--ink-3);font-size:14px;margin-top:6px}
.section{margin:36px 0}
.section-hd{display:flex;align-items:baseline;gap:12px;margin-bottom:16px;flex-wrap:wrap}
.section-hd h2{font-size:20px;letter-spacing:.05em}
.section-hd .hint{font-size:13px;color:var(--ink-3)}
.section-hd .more{margin-left:auto;font-size:13px;color:var(--cinnabar)}
.card{
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);transition:.2s
}
.btn{
  display:inline-flex;align-items:center;gap:6px;padding:9px 16px;border-radius:10px;
  border:1px solid var(--line);background:var(--paper-2);color:var(--ink);font-size:14px;transition:.18s
}
.btn:hover{border-color:var(--cinnabar);color:var(--cinnabar);transform:translateY(-1px)}
.btn.primary{background:var(--cinnabar);border-color:var(--cinnabar);color:#fff}
.btn.primary:hover{background:var(--cinnabar-soft);color:#fff}
.btn.sm{padding:5px 11px;font-size:13px;border-radius:8px}
.btn.ghost{background:transparent}
.chip{
  display:inline-block;padding:4px 11px;border-radius:999px;font-size:12.5px;
  border:1px solid var(--line);background:var(--paper-2);color:var(--ink-2);transition:.16s;cursor:pointer
}
.chip:hover{border-color:var(--dai);color:var(--dai)}
.chip.on{background:var(--dai);border-color:var(--dai);color:#fff}
.chip.cin.on{background:var(--cinnabar);border-color:var(--cinnabar)}
.muted{color:var(--ink-3)}
.small{font-size:13px}
.divider{height:1px;background:var(--line);margin:22px 0;opacity:.7}
.empty{padding:40px;text-align:center;color:var(--ink-3)}
footer{
  border-top:1px solid var(--line);margin-top:40px;padding:26px 0 40px;
  color:var(--ink-3);font-size:13px
}
footer .wrap{display:flex;gap:16px;flex-wrap:wrap;align-items:center}
.toast{
  position:fixed;left:50%;bottom:90px;transform:translate(-50%,20px);z-index:200;
  background:var(--ink);color:var(--paper);padding:10px 18px;border-radius:10px;font-size:14px;
  opacity:0;pointer-events:none;transition:.25s;box-shadow:var(--shadow-lg)
}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* ---------- 首页 hero ---------- */
.hero{
  position:relative;overflow:hidden;border-radius:20px;padding:44px 34px;
  background:linear-gradient(135deg,rgba(249,245,236,.9),rgba(240,233,218,.7));
  border:1px solid var(--line);box-shadow:var(--shadow-lg)
}
html[data-theme="dark"] .hero{background:linear-gradient(135deg,rgba(30,34,38,.9),rgba(24,27,31,.7))}
.hero:after{
  content:"道";position:absolute;right:-10px;top:-40px;font-family:var(--serif);
  font-size:240px;color:rgba(164,52,43,.07);line-height:1;pointer-events:none
}
.hero h1{font-size:40px;letter-spacing:.14em;margin-bottom:10px}
.hero .lead{font-family:var(--serif);font-size:17px;color:var(--ink-2);max-width:640px;line-height:2}
.hero .meta-row{display:flex;gap:26px;margin-top:22px;flex-wrap:wrap}
.stat .num{font-family:var(--serif);font-size:26px;color:var(--cinnabar);font-weight:700}
.stat .lbl{font-size:12px;color:var(--ink-3);letter-spacing:.1em}
.hero-actions{display:flex;gap:10px;margin-top:24px;flex-wrap:wrap}

/* 今日一章 */
.today{display:grid;grid-template-columns:1fr 1.15fr;gap:0}
.today .side{
  padding:26px;border-right:1px solid var(--line);
  background:linear-gradient(160deg,rgba(164,52,43,.05),transparent)
}
.today .body{padding:26px 28px}
.today .ch-no{font-family:var(--serif);font-size:52px;line-height:1;color:var(--cinnabar);opacity:.9}
.today .ch-title{font-family:var(--serif);font-size:24px;letter-spacing:.1em;margin:6px 0 14px}
.today .ch-text{font-family:var(--serif);font-size:16.5px;line-height:2.2;color:var(--ink-2)}
.today .gist{margin-top:14px;padding:12px 14px;background:var(--paper-3);border-radius:10px;font-size:14px;color:var(--ink-2);border-left:3px solid var(--gold)}

/* 方格入口 */
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.entry{padding:20px;border-radius:var(--radius);border:1px solid var(--line);background:var(--paper-2);transition:.2s;display:block}
.entry:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:var(--cinnabar)}
.entry .ei{font-size:26px}
.entry .et{font-family:var(--serif);font-size:17px;margin-top:8px;letter-spacing:.05em}
.entry .ed{font-size:12.5px;color:var(--ink-3);margin-top:4px}

/* ---------- 章节列表 ---------- */
.filters{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-bottom:16px}
.searchbox{
  display:flex;align-items:center;gap:8px;background:var(--paper-2);
  border:1px solid var(--line);border-radius:11px;padding:8px 13px;flex:1;min-width:200px;max-width:420px
}
.searchbox input{border:0;background:transparent;outline:none;flex:1;font-size:15px}
.ch-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(158px,1fr));gap:12px}
.ch-cell{
  position:relative;padding:14px 14px 12px;border-radius:12px;border:1px solid var(--line);
  background:var(--paper-2);transition:.18s;cursor:pointer;overflow:hidden
}
.ch-cell:hover{transform:translateY(-2px);border-color:var(--cinnabar);box-shadow:var(--shadow)}
.ch-cell .no{font-family:var(--serif);font-size:26px;color:var(--cinnabar);line-height:1;opacity:.85}
.ch-cell .tt{font-family:var(--serif);font-size:17px;letter-spacing:.14em;margin:6px 0 4px}
.ch-cell .pv{font-size:12.5px;color:var(--ink-3);line-height:1.7;height:2.6em;overflow:hidden}
.ch-cell .flags{position:absolute;top:10px;right:10px;display:flex;gap:4px;font-size:12px}
.ch-cell.done{background:linear-gradient(150deg,rgba(63,93,96,.08),var(--paper-2))}
.ch-cell .progress-dot{width:6px;height:6px;border-radius:50%;background:var(--dai)}
.part-hd{grid-column:1/-1;font-family:var(--serif);font-size:18px;letter-spacing:.2em;color:var(--ink-3);
  margin:14px 0 2px;display:flex;align-items:center;gap:12px}
.part-hd:after{content:"";flex:1;height:1px;background:var(--line)}

/* ---------- 章节详情 ---------- */
.ch-head{display:flex;align-items:flex-start;gap:18px;flex-wrap:wrap}
.ch-badge{
  width:64px;height:64px;border-radius:14px;background:var(--cinnabar);color:#fff;
  display:grid;place-items:center;font-family:var(--serif);font-size:26px;flex:none;
  box-shadow:0 6px 18px rgba(164,52,43,.3)
}
.ch-head .t1{font-family:var(--serif);font-size:30px;letter-spacing:.12em}
.ch-head .t2{font-size:13px;color:var(--ink-3);margin-top:4px}
.toolbar{display:flex;gap:7px;flex-wrap:wrap;margin:18px 0 14px;align-items:center}
.original{
  font-family:var(--serif);font-size:clamp(19px,2.4vw,25px);line-height:2.3;letter-spacing:.06em;
  padding:28px 26px;border-radius:var(--radius);border:1px solid var(--line);
  background:linear-gradient(180deg,var(--paper-2),var(--paper));position:relative
}
.original:before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:4px;
  background:linear-gradient(180deg,var(--cinnabar),var(--gold));border-radius:4px 0 0 4px;opacity:.75
}
.original.vertical{
  writing-mode:vertical-rl;text-orientation:upright;height:min(70vh,620px);
  overflow-x:auto;padding:26px 20px;line-height:2.1;letter-spacing:.14em
}
.original .sent{cursor:pointer;transition:.15s;border-radius:4px}
.original .sent:hover{background:rgba(164,52,43,.1)}
.original .sent.hl{background:rgba(201,168,106,.28);box-shadow:0 0 0 1px rgba(164,52,43,.3)}
.tabs{display:flex;gap:6px;flex-wrap:wrap;border-bottom:1px solid var(--line);margin-bottom:16px}
.tab{padding:9px 14px;font-size:14px;color:var(--ink-3);border-bottom:2px solid transparent;cursor:pointer;transition:.16s;white-space:nowrap}
.tab:hover{color:var(--ink)}
.tab.on{color:var(--cinnabar);border-bottom-color:var(--cinnabar);font-weight:600}
.panel{font-size:15.5px;line-height:2;color:var(--ink-2)}
.panel p{margin:0 0 12px}
.panel .note-item{margin-bottom:8px;font-size:14px}
.panel .src{font-size:12px;color:var(--ink-3);margin-bottom:12px}
.panel blockquote{margin:0;padding:10px 14px;border-left:3px solid var(--gold);background:var(--paper-3);border-radius:0 8px 8px 0}
.notes-area{width:100%;min-height:90px;border:1px solid var(--line);border-radius:10px;padding:12px;
  background:var(--paper);resize:vertical;font-size:14.5px;line-height:1.9;outline:none}
.notes-area:focus{border-color:var(--dai)}
.kv{display:grid;grid-template-columns:auto 1fr;gap:6px 14px;font-size:14px;margin-top:10px}
.kv dt{color:var(--ink-3)}
.kv dd{margin:0}
.ch-nav{display:flex;gap:10px;margin-top:22px;flex-wrap:wrap}
.ch-nav .btn{flex:1;min-width:120px;justify-content:center}
.related{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:10px}
.rel-item{padding:12px 14px;border:1px solid var(--line);border-radius:10px;background:var(--paper-2);cursor:pointer;transition:.18s}
.rel-item:hover{border-color:var(--cinnabar);transform:translateY(-2px)}
.rel-item .rn{font-family:var(--serif);font-size:15px;color:var(--cinnabar)}
.rel-item .rt{font-size:13px;color:var(--ink-3);margin-top:2px;line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* ---------- 问道 ---------- */
.ask-hero{text-align:center;padding:34px 20px 26px}
.ask-hero h1{font-size:30px;letter-spacing:.1em}
.ask-hero p{color:var(--ink-3);font-size:14.5px;margin-top:8px}
.ask-box{
  max-width:760px;margin:0 auto;background:var(--paper-2);border:1px solid var(--line);
  border-radius:16px;padding:8px;box-shadow:var(--shadow);display:flex;gap:8px;align-items:center
}
.ask-box input{flex:1;border:0;outline:none;background:transparent;padding:12px 14px;font-size:16px}
.ask-box button{padding:11px 20px;border-radius:11px;border:0;background:var(--cinnabar);color:#fff;font-size:15px;transition:.18s}
.ask-box button:hover{background:var(--cinnabar-soft)}
.examples{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin-top:16px;max-width:760px;margin-left:auto;margin-right:auto}
.answer{margin-top:26px}
.ans-intro{
  padding:14px 18px;border-radius:12px;background:linear-gradient(120deg,rgba(164,52,43,.07),rgba(63,93,96,.05));
  border:1px solid var(--line);font-size:15px;color:var(--ink-2);margin-bottom:18px
}
.hit{padding:20px 22px;border-radius:var(--radius);border:1px solid var(--line);background:var(--paper-2);margin-bottom:14px;box-shadow:var(--shadow)}
.hit.best{border-color:var(--cinnabar);box-shadow:0 4px 22px rgba(164,52,43,.14)}
.hit-hd{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:12px}
.hit-no{font-family:var(--serif);font-size:20px;color:var(--cinnabar)}
.hit-tt{font-family:var(--serif);font-size:18px;letter-spacing:.1em}
.hit-score{margin-left:auto;font-size:12px;color:var(--ink-3)}
.hit-quote{
  font-family:var(--serif);font-size:19px;line-height:2.05;letter-spacing:.04em;
  padding:14px 18px;background:var(--paper);border-left:3px solid var(--cinnabar);border-radius:0 10px 10px 0;margin-bottom:12px
}
.hit-quote em{font-style:normal;background:rgba(201,168,106,.35);border-radius:3px;padding:0 2px}
.hit-why{font-size:14px;color:var(--ink-2);line-height:1.95}
.hit-why b{color:var(--cinnabar);font-weight:600}
.hit-tags{display:flex;gap:6px;flex-wrap:wrap;margin-top:12px}
.hit-actions{display:flex;gap:8px;margin-top:14px;flex-wrap:wrap}
.ai-box{margin-top:16px;padding:16px 18px;border:1px dashed var(--line);border-radius:12px;background:var(--paper-2)}
.ai-box textarea{width:100%;border:1px solid var(--line);border-radius:10px;padding:10px;background:var(--paper);resize:vertical;min-height:80px;outline:none;font-size:14.5px;line-height:1.9}
.ai-out{white-space:pre-wrap;font-size:15px;line-height:2;color:var(--ink-2);margin-top:12px;font-family:var(--serif)}
.keyline{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-top:10px}
.keyline input{flex:1;min-width:180px;border:1px solid var(--line);border-radius:9px;padding:8px 12px;background:var(--paper);outline:none;font-size:13px}

/* ---------- AI 设置面板 ---------- */
.ai-head{display:flex;gap:10px;align-items:baseline;flex-wrap:wrap;margin-bottom:12px}
.ai-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:10px 12px}
.ai-f{display:flex;flex-direction:column;gap:5px}
.ai-f>span{font-size:12px;color:var(--ink-3);letter-spacing:.04em}
.ai-f>span b{color:var(--cinnabar);font-weight:600}
.ai-f select,.ai-f input{
  width:100%;border:1px solid var(--line);border-radius:9px;padding:8px 10px;
  background:var(--paper);color:var(--ink);outline:none;font-size:13px;font-family:inherit;
  -webkit-appearance:none;appearance:none;
}
.ai-f select{
  background-image:linear-gradient(45deg,transparent 50%,var(--ink-3) 50%),linear-gradient(135deg,var(--ink-3) 50%,transparent 50%);
  background-position:calc(100% - 15px) 51%,calc(100% - 10px) 51%;
  background-size:5px 5px,5px 5px;background-repeat:no-repeat;padding-right:28px;
}
.ai-f select:focus,.ai-f input:focus{border-color:var(--cinnabar)}
.ai-fkey{grid-column:1/-1}
.ai-ftemp input[type=range]{padding:0;border:0;background:transparent;height:22px;accent-color:var(--cinnabar);width:100%}
.ai-ftemp input[type=range]::-webkit-slider-runnable-track{height:4px;background:var(--line);border-radius:3px}
.ai-ftemp input[type=range]::-moz-range-track{height:4px;background:var(--line);border-radius:3px}
.ai-tip{margin-top:10px;padding:8px 11px;border-radius:8px;background:var(--paper);border:1px solid var(--line);line-height:1.75}
.ai-sw{display:inline-flex;gap:5px;align-items:center;cursor:pointer}
.ai-sw input{accent-color:var(--cinnabar);width:15px;height:15px}
@media (max-width:600px){
  .ai-grid{grid-template-columns:1fr}
  .ai-box{padding:13px 13px}
}
.boshu-tag{margin-top:4px;color:var(--gold);font-size:11px;letter-spacing:.02em}

/* ---------- 帛书甲乙本 / 注文小标题 ---------- */
.sub-hd{
  font-family:var(--serif);font-size:15px;font-weight:600;color:var(--ink);
  margin:18px 0 8px;padding-left:9px;border-left:3px solid var(--cinnabar);
  display:flex;align-items:center;gap:8px;
}
.sub-hd:first-of-type{margin-top:12px}
.sub-hd .btn{padding:2px 8px;font-size:11px;font-family:var(--sans)}
.bs-order{
  display:inline-block;margin-top:8px;padding:4px 10px;border-radius:20px;
  background:var(--paper);border:1px solid var(--line);font-size:12px;color:var(--ink-2);
}
.bs-cmp{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:12px}
.bs-col{min-width:0}
.bs-col-hd{
  font-family:var(--serif);font-size:14px;font-weight:600;color:var(--ink);
  margin-bottom:7px;display:flex;align-items:center;gap:8px;justify-content:space-between;
}
.bs-col-hd .btn{padding:2px 8px;font-size:11px;font-family:var(--sans)}
.bs-text{
  font-family:var(--serif);font-size:15.5px;line-height:2.05;color:var(--ink);
  padding:12px 14px;border-radius:10px;background:var(--paper);border:1px dashed var(--line);
  height:calc(100% - 30px);overflow:visible;
}
.bs-text p{margin:0 0 6px}
.bs-text p:last-child{margin-bottom:0}
@media (max-width:760px){
  .bs-cmp{grid-template-columns:1fr}
  .bs-text{height:auto;font-size:16px}
}

/* ---------- 名句 ---------- */
.q-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:14px}
.q-card{padding:20px;border-radius:var(--radius);border:1px solid var(--line);background:var(--paper-2);transition:.2s;position:relative;overflow:hidden}
.q-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:var(--cinnabar)}
.q-card:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 100% 0,rgba(164,52,43,.06),transparent 60%);pointer-events:none}
.q-text{font-family:var(--serif);font-size:19px;line-height:1.95;letter-spacing:.03em;position:relative}
.q-src{font-size:12.5px;color:var(--cinnabar);margin-top:10px}
.q-mean{font-size:13.5px;color:var(--ink-2);margin-top:8px;line-height:1.9}
.q-use{font-size:13px;color:var(--ink-3);margin-top:8px;padding-top:8px;border-top:1px dashed var(--line);line-height:1.85}
.q-acts{display:flex;gap:6px;margin-top:12px;position:relative}

/* ---------- 学习 ---------- */
.path-card{padding:20px;border-radius:var(--radius);border:1px solid var(--line);background:var(--paper-2);transition:.2s;cursor:pointer}
.path-card:hover{border-color:var(--cinnabar);transform:translateY(-2px);box-shadow:var(--shadow)}
.path-card h3{font-size:18px;letter-spacing:.06em}
.path-card .pd{font-size:13px;color:var(--ink-3);margin:6px 0 12px;line-height:1.8}
.path-chips{display:flex;gap:5px;flex-wrap:wrap}
.path-chips span{width:30px;height:30px;border-radius:8px;border:1px solid var(--line);display:grid;place-items:center;font-size:12px;color:var(--ink-2);font-family:var(--serif)}
.essay{padding:28px 30px;border-radius:var(--radius);border:1px solid var(--line);background:var(--paper-2)}
.essay h3{font-size:21px;letter-spacing:.06em;margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid var(--line)}
.essay .body{font-size:15.5px;line-height:2.1;color:var(--ink-2);white-space:pre-wrap;font-family:var(--serif)}
.plan{display:grid;grid-template-columns:repeat(auto-fill,minmax(46px,1fr));gap:6px;margin-top:14px}
.plan-day{
  height:46px;border-radius:8px;border:1px solid var(--line);display:grid;place-items:center;
  font-size:13px;color:var(--ink-3);cursor:pointer;transition:.16s;font-family:var(--serif);background:var(--paper-2)
}
.plan-day:hover{border-color:var(--cinnabar);color:var(--cinnabar)}
.plan-day.done{background:var(--cinnabar);border-color:var(--cinnabar);color:#fff}

/* ---------- 搜索 ---------- */
.res{padding:16px 18px;border-radius:12px;border:1px solid var(--line);background:var(--paper-2);margin-bottom:10px;cursor:pointer;transition:.18s}
.res:hover{border-color:var(--cinnabar);box-shadow:var(--shadow)}
.res .rh{font-size:13px;color:var(--cinnabar);margin-bottom:6px}
.res .rb{font-size:14.5px;line-height:1.9;color:var(--ink-2)}
.res mark{background:rgba(201,168,106,.4);color:inherit;border-radius:3px;padding:0 2px}

/* ---------- 响应式 ---------- */
@media (max-width:900px){
  .today{grid-template-columns:1fr}
  .today .side{border-right:0;border-bottom:1px solid var(--line)}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:1fr}
}
@media (max-width:720px){
  body{font-size:15.5px}
  main{padding:18px 0 90px}
  .wrap{padding:0 14px}
  .nav{display:none;position:absolute;top:60px;left:0;right:0;flex-direction:column;gap:0;
    background:var(--paper-2);border-bottom:1px solid var(--line);padding:8px;box-shadow:var(--shadow-lg)}
  .nav.open{display:flex}
  .nav a{padding:11px 14px;font-size:15px;border-radius:8px}
  .menu-toggle{display:grid}
  .tabbar{display:flex}
  .hero{padding:30px 20px;border-radius:16px}
  .hero h1{font-size:30px}
  .hero:after{font-size:150px;top:-20px}
  .grid-4,.grid-2{grid-template-columns:repeat(2,1fr)}
  .entry{padding:14px}
  .ch-grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:10px}
  .original{padding:20px 16px;line-height:2.1}
  .original.vertical{height:62vh}
  .q-grid{grid-template-columns:1fr}
  .essay{padding:20px 18px}
  .ch-head .t1{font-size:24px}
  .toast{bottom:78px}
  .ask-hero h1{font-size:24px}
}
@media print{.topbar,.tabbar,.toolbar,.ch-nav,.tabs{display:none}}