:root{
  --paper:#F6F2EA; --paper-2:#EEE7D9; --paper-3:#E6DECC;
  --ink:#171512; --ink-2:#4A443B; --ink-3:#8A8377; --ink-4:#B5AE9F;
  --cinnabar:#A63F30; --cinnabar-2:#8C3125; --gold:#B08A4A; --jade:#4E6B5E;
  --line:rgba(23,21,18,.10); --line-2:rgba(23,21,18,.18);
  --serif:"Songti SC","STSong","SimSun","Noto Serif SC","Source Han Serif SC",serif;
  --sans:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;
  --latin:"Helvetica Neue",Arial,"Segoe UI",sans-serif;
  --shadow:0 30px 80px -40px rgba(30,22,10,.45);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--sans);font-size:15px;line-height:1.75;
  overflow-x:hidden;-webkit-font-smoothing:antialiased;
}
body::before{
  content:"";position:fixed;inset:0;z-index:-2;pointer-events:none;
  background:
    radial-gradient(1200px 700px at 78% -10%, rgba(166,63,48,.07), transparent 60%),
    radial-gradient(900px 600px at 10% 110%, rgba(176,138,74,.10), transparent 60%),
    radial-gradient(800px 500px at 50% 50%, rgba(255,255,255,.35), transparent 70%);
  animation:drift 26s var(--ease) infinite alternate;
}
body::after{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.5;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/><feColorMatrix type='saturate' values='0'/></filter><rect width='160' height='160' filter='url(%23n)' opacity='.06'/></svg>");
}
@keyframes drift{from{transform:translate3d(0,0,0) scale(1)}to{transform:translate3d(-2%,1.5%,0) scale(1.05)}}
::selection{background:rgba(166,63,48,.16)}

a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
input,textarea{font-family:inherit}

/* ---------- header ---------- */
.hd{
  position:fixed;top:0;left:0;right:0;z-index:60;height:74px;
  display:flex;align-items:center;justify-content:space-between;
  padding:0 40px;transition:background .5s var(--ease),border-color .5s,height .5s;
  border-bottom:1px solid transparent;
}
.hd.scrolled{background:rgba(246,242,234,.82);backdrop-filter:blur(18px) saturate(1.2);border-bottom-color:var(--line);height:64px}
.brand{display:flex;align-items:center;gap:14px;flex-shrink:0}
.seal{
  width:38px;height:38px;border:1.5px solid var(--cinnabar);color:var(--cinnabar);
  display:grid;place-items:center;font-family:var(--serif);font-size:19px;line-height:1;
  border-radius:4px;letter-spacing:0;position:relative;background:rgba(166,63,48,.04);
}
.seal::after{content:"";position:absolute;inset:2px;border:.5px solid rgba(166,63,48,.4);border-radius:2px}
.brand-t{display:flex;flex-direction:column;line-height:1.15}
.brand-t b{font-family:var(--serif);font-size:17px;letter-spacing:.34em;font-weight:600;white-space:nowrap}
.brand-t i{font-family:var(--latin);font-style:normal;font-size:8.5px;letter-spacing:.42em;color:var(--ink-3);white-space:nowrap}
.nav{display:flex;gap:34px;align-items:center;font-size:13px;letter-spacing:.14em;color:var(--ink-2)}
.nav a{position:relative;padding:6px 0;transition:color .3s}
.nav a::after{content:"";position:absolute;left:0;right:100%;bottom:0;height:1px;background:var(--cinnabar);transition:right .45s var(--ease)}
.nav a:hover{color:var(--ink)}
.nav a:hover::after{right:0}
.nav a.on{color:var(--cinnabar)}
.nav a.on::after{right:0}
.hd-r{display:flex;align-items:center;gap:26px;font-size:12px;letter-spacing:.12em;color:var(--ink-3)}
.hd-clock{font-variant-numeric:tabular-nums}
.burger{display:none;width:34px;height:34px;border:1px solid var(--line-2);border-radius:50%;place-items:center}

/* ---------- hero ---------- */
.hero{position:relative;min-height:100vh;padding:112px 40px 80px 100px;display:grid;
  grid-template-columns:minmax(0,1fr) minmax(360px,470px);gap:60px;align-items:start;max-width:1440px;margin:0 auto}
.hero-l{position:relative}
.eyebrow{font-family:var(--latin);font-size:10px;letter-spacing:.52em;color:var(--ink-3);text-transform:uppercase;margin-bottom:26px}
.hero h1{
  font-family:var(--serif);font-weight:500;font-size:clamp(46px,6.6vw,90px);line-height:1.08;
  letter-spacing:.06em;margin:0 0 6px;display:flex;flex-wrap:wrap;
}
.hero h1 span{display:inline-block;opacity:0;transform:translateY(38px) rotate(1.5deg);animation:rise 1.1s var(--ease) forwards}
.hero h1 span:nth-child(2){animation-delay:.12s}
.hero h1 .dot{color:var(--cinnabar)}
@keyframes rise{to{opacity:1;transform:none}}
.hero-en{font-family:var(--latin);font-size:clamp(11px,1.1vw,14px);letter-spacing:.64em;color:var(--ink-3);margin:18px 0 40px;opacity:0;animation:fadeUp 1.2s .5s var(--ease) forwards}
.lede{max-width:520px;color:var(--ink-2);font-size:15.5px;line-height:2;font-family:var(--serif);opacity:0;animation:fadeUp 1.2s .65s var(--ease) forwards}
.lede em{font-style:normal;color:var(--cinnabar)}
.hero-meta{display:flex;gap:44px;margin-top:52px;opacity:0;animation:fadeUp 1.2s .8s var(--ease) forwards}
.hero-meta div{display:flex;flex-direction:column;gap:4px}
.hero-meta b{font-family:var(--serif);font-size:22px;font-weight:500;letter-spacing:.06em}
.hero-meta span{font-size:11px;letter-spacing:.2em;color:var(--ink-3)}
@keyframes fadeUp{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}

/* rail */
.rail{position:fixed;left:30px;top:50%;transform:translateY(-50%);z-index:55;display:flex;flex-direction:column;gap:18px;align-items:center;transition:opacity .55s var(--ease),transform .55s var(--ease)}
body.deep .rail{opacity:0;transform:translateY(-50%) translateX(-10px);pointer-events:none}
.rail::before{content:"";position:absolute;top:-70px;bottom:-70px;left:50%;width:1px;background:linear-gradient(var(--line),transparent 12%,transparent 88%,var(--line))}
.rail button{writing-mode:vertical-rl;font-size:10.5px;letter-spacing:.3em;color:var(--ink-3);padding:8px 0;transition:color .3s,transform .4s var(--ease);background:var(--paper);position:relative;z-index:1}
.rail button:hover{color:var(--cinnabar);transform:translateX(2px)}
.rail button.on{color:var(--cinnabar)}

/* ---------- cast card ---------- */
.cast{
  position:relative;background:rgba(255,253,248,.66);backdrop-filter:blur(20px) saturate(1.15);
  border:1px solid var(--line);border-radius:22px;padding:30px 30px 26px;box-shadow:var(--shadow);
  opacity:0;animation:fadeUp 1.3s .55s var(--ease) forwards;
}
.cast::before{content:"";position:absolute;left:26px;right:26px;top:0;height:1px;background:linear-gradient(90deg,transparent,rgba(166,63,48,.5),transparent)}
.cast-h{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:20px}
.cast-h b{font-family:var(--serif);font-size:19px;letter-spacing:.18em;font-weight:500}
.cast-h span{font-family:var(--latin);font-size:9px;letter-spacing:.36em;color:var(--ink-3)}
.tabs{display:flex;gap:6px;background:rgba(23,21,18,.045);border-radius:12px;padding:4px;margin-bottom:20px}
.tabs button{flex:1;padding:9px 0;border-radius:9px;font-size:12.5px;letter-spacing:.14em;color:var(--ink-2);transition:.35s var(--ease)}
.tabs button.on{background:#fff;color:var(--ink);box-shadow:0 4px 14px -6px rgba(0,0,0,.22)}
.pane{display:none}
.pane.on{display:block;animation:fadeUp .5s var(--ease)}
.field{display:flex;flex-direction:column;gap:8px;margin-bottom:14px}
.field label{font-size:11.5px;letter-spacing:.18em;color:var(--ink-3)}
.field input,.field select{
  width:100%;padding:12px 14px;border:1px solid var(--line-2);border-radius:11px;background:rgba(255,255,255,.7);
  font-size:14px;color:var(--ink);outline:none;transition:.3s var(--ease);letter-spacing:.04em;
}
.field input:focus,.field select:focus{border-color:rgba(166,63,48,.55);box-shadow:0 0 0 4px rgba(166,63,48,.07);background:#fff}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.row3{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.hint{font-size:11px;color:var(--ink-3);letter-spacing:.05em;line-height:1.6}
.btn{
  width:100%;padding:15px;border-radius:12px;background:var(--ink);color:#F8F4EA;
  font-size:13.5px;letter-spacing:.36em;transition:.4s var(--ease);position:relative;overflow:hidden;
}
.btn:hover{background:var(--cinnabar);transform:translateY(-1px);box-shadow:0 14px 30px -14px rgba(166,63,48,.6)}
.btn:active{transform:scale(.985)}
.btn::after{content:"";position:absolute;inset:0;background:radial-gradient(circle at var(--x,50%) var(--y,50%),rgba(255,255,255,.28),transparent 40%);opacity:0;transition:opacity .5s}
.btn:hover::after{opacity:1}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line-2)}
.btn.ghost:hover{background:rgba(23,21,18,.04);border-color:var(--line-2);box-shadow:none}
.pick-gua{display:grid;grid-template-columns:repeat(8,1fr);gap:6px}
.pick-gua button{padding:8px 0;border:1px solid var(--line);border-radius:8px;font-family:var(--serif);font-size:14px;transition:.3s}
.pick-gua button.on{background:var(--ink);color:#F8F4EA;border-color:var(--ink)}
.pick-gua button:hover{border-color:var(--cinnabar);color:var(--cinnabar)}
.pick-gua button.on:hover{color:#F8F4EA}
.moving-pick{display:grid;grid-template-columns:repeat(6,1fr);gap:6px}
.moving-pick button{padding:9px 0;border:1px solid var(--line);border-radius:8px;font-size:12px;letter-spacing:.08em;transition:.3s}
.moving-pick button.on{background:var(--cinnabar);color:#FBF6EC;border-color:var(--cinnabar)}
.sel-label{font-size:11px;letter-spacing:.16em;color:var(--ink-3);margin:4px 0 8px}

/* ---------- sections ---------- */
.sec{max-width:1440px;margin:0 auto;padding:110px 40px;position:relative}
.sec-h{display:flex;align-items:flex-end;justify-content:space-between;gap:30px;margin-bottom:52px}
.sec-h .l{display:flex;flex-direction:column;gap:10px}
.sec-h .no{font-family:var(--latin);font-size:10px;letter-spacing:.42em;color:var(--cinnabar)}
.sec-h h2{font-family:var(--serif);font-size:clamp(30px,3.4vw,44px);font-weight:500;letter-spacing:.14em;margin:0}
.sec-h p{max-width:420px;color:var(--ink-3);font-size:13px;line-height:1.9;margin:0}
.reveal{opacity:1;transform:none;transition:opacity 1s var(--ease),transform 1s var(--ease)}
.reveal.pre{opacity:0;transform:translateY(30px)}
.reveal.in{opacity:1;transform:none}

/* hexagram grid */
.grid64{display:grid;grid-template-columns:repeat(8,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:16px;overflow:hidden}
.gcell{background:var(--paper);padding:18px 10px 16px;display:flex;flex-direction:column;align-items:center;gap:8px;
  transition:background .4s var(--ease),transform .4s var(--ease);cursor:pointer;position:relative}
.gcell:hover{background:#FCFAF5;transform:translateY(-2px);z-index:2;box-shadow:0 14px 30px -20px rgba(0,0,0,.35)}
.gcell .uni{font-size:26px;line-height:1;color:var(--ink);transition:.4s}
.gcell:hover .uni{color:var(--cinnabar);transform:scale(1.08)}
.gcell .nm{font-family:var(--serif);font-size:13px;letter-spacing:.1em}
.gcell .no{font-family:var(--latin);font-size:8.5px;letter-spacing:.2em;color:var(--ink-4)}

/* corpus */
.corpus{display:grid;grid-template-columns:290px 1fr;gap:56px;align-items:start}
.toc{position:sticky;top:100px;display:flex;flex-direction:column;gap:2px;max-height:70vh;overflow:auto;padding-right:8px}
.toc button{text-align:left;padding:10px 14px;border-radius:9px;font-size:12.5px;letter-spacing:.1em;color:var(--ink-2);transition:.3s;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.toc button:hover{background:rgba(23,21,18,.04)}
.toc button.on{background:var(--ink);color:#F6F1E6}
.reader{font-family:var(--serif);font-size:15.5px;line-height:2.15;color:#2A2620;max-width:760px}
.reader h3{font-family:var(--serif);font-size:26px;font-weight:500;letter-spacing:.16em;margin:0 0 28px;padding-bottom:18px;border-bottom:1px solid var(--line)}
.reader p{margin:0 0 1.1em;text-indent:2em;letter-spacing:.02em}
.reader p:nth-child(2){text-indent:0}
.reader .sub-h{font-family:var(--serif);font-size:17px;font-weight:500;letter-spacing:.18em;color:var(--ink);margin:2.2em 0 .7em;text-indent:0}
.reader .toc-line{font-size:12.5px;line-height:1.9;color:var(--ink-3);text-indent:0;margin:0;letter-spacing:.06em}
.reader .mark{color:var(--cinnabar)}

/* zihua */
.zihua-wrap{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.zh-input{display:flex;gap:12px}
.zh-input input{flex:1;padding:16px 18px;border:1px solid var(--line-2);border-radius:12px;background:rgba(255,255,255,.7);font-size:22px;font-family:var(--serif);letter-spacing:.2em;outline:none;transition:.3s}
.zh-input input:focus{border-color:var(--cinnabar);box-shadow:0 0 0 4px rgba(166,63,48,.07)}
.zh-res{background:rgba(255,253,248,.6);border:1px solid var(--line);border-radius:16px;padding:26px;min-height:240px}
.zh-glyph{font-family:var(--serif);font-size:96px;line-height:1;color:var(--ink);text-align:center;padding:12px 0 20px;letter-spacing:0}
.zh-meta{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:8px}
.zh-meta div{padding:12px 14px;border:1px solid var(--line);border-radius:10px;background:rgba(255,255,255,.5)}
.zh-meta b{display:block;font-size:10px;letter-spacing:.2em;color:var(--ink-3);font-weight:400;margin-bottom:4px}
.zh-meta span{font-family:var(--serif);font-size:15px;letter-spacing:.06em}

/* footer */
.ft{border-top:1px solid var(--line);padding:56px 40px 40px;max-width:1440px;margin:0 auto;display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap;color:var(--ink-3);font-size:12px;letter-spacing:.1em}
.ft b{font-family:var(--serif);font-size:15px;color:var(--ink-2);letter-spacing:.2em;font-weight:500;display:block;margin-bottom:10px}

/* ---------- overlay result ---------- */
.ov{position:fixed;inset:0;z-index:100;background:rgba(246,242,234,.98);backdrop-filter:blur(20px);display:none;overflow:auto}
.ov.on{display:block;animation:ovIn .6s var(--ease)}
@keyframes ovIn{from{opacity:0;transform:scale(1.01)}to{opacity:1;transform:none}}
.ov-in{max-width:1180px;margin:0 auto;padding:86px 40px 80px;position:relative}
.ov-close{position:fixed;top:26px;right:32px;width:44px;height:44px;border:1px solid var(--line-2);border-radius:50%;display:grid;place-items:center;font-size:18px;color:var(--ink-2);transition:.35s;background:rgba(246,242,234,.8);z-index:2}
.ov-close:hover{background:var(--ink);color:#F6F1E6;transform:rotate(90deg)}
.res-hd{display:flex;align-items:flex-end;justify-content:space-between;gap:30px;margin-bottom:44px;padding-bottom:26px;border-bottom:1px solid var(--line)}
.res-hd .t{display:flex;flex-direction:column;gap:8px}
.res-hd .k{font-family:var(--latin);font-size:9.5px;letter-spacing:.42em;color:var(--cinnabar)}
.res-hd h2{font-family:var(--serif);font-size:clamp(34px,4.6vw,58px);font-weight:500;letter-spacing:.14em;margin:0;display:flex;align-items:baseline;gap:18px}
.res-hd h2 small{font-size:12px;letter-spacing:.3em;color:var(--ink-3);font-family:var(--sans)}
.res-body{display:grid;grid-template-columns:300px 1fr;gap:60px;align-items:start}
.pan-col{display:flex;flex-direction:column;gap:34px}
.pan-card{background:rgba(255,253,248,.6);border:1px solid var(--line);border-radius:18px;padding:24px}
.pan-card h4{font-family:var(--serif);font-size:13px;font-weight:500;letter-spacing:.24em;color:var(--ink-3);margin:0 0 18px;display:flex;justify-content:space-between;align-items:center}
.pan-card h4 em{font-style:normal;font-family:var(--latin);font-size:8.5px;letter-spacing:.3em;color:var(--ink-4)}
.hex-v{display:flex;flex-direction:column-reverse;align-items:center;gap:9px;padding:8px 0}
.line{width:120px;height:9px;display:flex;justify-content:space-between;position:relative}
.line i{background:var(--ink);height:100%;display:block;border-radius:1px;transform-origin:center;transform:scaleX(0);transition:transform .6s var(--ease)}
.line.yin i{width:44%}
.line.yang i{width:100%}
.line.mv i{background:var(--cinnabar)}
.line.mv::after{content:"动";position:absolute;right:-30px;top:-3px;font-size:9px;letter-spacing:.1em;color:var(--cinnabar)}
.line.on i{transform:scaleX(1)}
.pan-name{font-family:var(--serif);font-size:26px;letter-spacing:.16em;text-align:center;margin-top:12px}
.pan-sub{text-align:center;font-size:10.5px;letter-spacing:.3em;color:var(--ink-3);margin-top:2px}
.score-box{display:flex;align-items:center;gap:22px}
.ring{width:104px;height:104px;border-radius:50%;display:grid;place-items:center;position:relative;
  background:conic-gradient(var(--cinnabar) calc(var(--p)*1%), rgba(23,21,18,.07) 0);transition:background 1.4s var(--ease)}
.ring::before{content:"";position:absolute;inset:7px;border-radius:50%;background:var(--paper)}
.ring b{position:relative;font-family:var(--serif);font-size:22px;letter-spacing:.1em;font-weight:500}
.ring.good{background:conic-gradient(var(--jade) calc(var(--p)*1%), rgba(23,21,18,.07) 0)}
.score-txt{display:flex;flex-direction:column;gap:6px}
.score-txt b{font-family:var(--serif);font-size:26px;letter-spacing:.2em;font-weight:500}
.score-txt span{font-size:11px;letter-spacing:.16em;color:var(--ink-3)}
.reasons{display:flex;flex-direction:column}
.reason{padding:16px 0;border-bottom:1px solid var(--line);font-size:13.5px;line-height:1.9;color:var(--ink-2);display:flex;gap:14px;opacity:0;transform:translateY(10px)}
.reason.on{opacity:1;transform:none;transition:.7s var(--ease)}
.reason i{font-style:normal;font-family:var(--latin);font-size:9px;letter-spacing:.2em;color:var(--cinnabar);padding-top:4px;min-width:16px}
.reason b{font-weight:500;color:var(--ink)}
.trigram-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.trigram{text-align:center;padding:16px 8px;border:1px solid var(--line);border-radius:12px;background:rgba(255,255,255,.4)}
.trigram .u{font-size:28px;line-height:1;margin-bottom:6px}
.trigram .n{font-family:var(--serif);font-size:13px;letter-spacing:.14em}
.trigram .w{font-size:10px;color:var(--ink-3);letter-spacing:.16em;margin-top:3px}
.kv{display:flex;flex-direction:column;gap:0;margin-top:6px}
.kv div{display:flex;justify-content:space-between;gap:20px;padding:11px 0;border-bottom:1px dashed var(--line)}
.kv b{font-weight:400;font-size:11px;letter-spacing:.18em;color:var(--ink-3)}
.kv span{font-family:var(--serif);font-size:13.5px;letter-spacing:.06em;text-align:right}
.texts p{font-family:var(--serif);font-size:15px;line-height:2;color:#2A2620;margin:0 0 14px;text-indent:0}
.texts .lbl{font-size:10px;letter-spacing:.24em;color:var(--cinnabar);display:block;margin-bottom:4px;font-family:var(--sans)}
.text-note{margin:16px 0 0;padding-top:12px;border-top:1px dashed var(--line);font-size:11.5px;line-height:1.8;color:var(--ink-4);letter-spacing:.04em}

/* cast animation overlay */
.castfx{position:fixed;inset:0;z-index:120;background:rgba(246,242,234,.985);display:none;place-items:center}
.castfx.on{display:grid;animation:ovIn .4s var(--ease)}
.castfx .box{display:flex;flex-direction:column;align-items:center;gap:34px}
.castfx .hex-v{gap:12px}
.castfx .line{width:150px;height:11px}
.castfx .title{font-family:var(--serif);font-size:13px;letter-spacing:.6em;color:var(--ink-3)}
.castfx .sub{font-family:var(--latin);font-size:9px;letter-spacing:.4em;color:var(--ink-4)}

/* toast */
.toast{position:fixed;left:50%;bottom:40px;transform:translateX(-50%) translateY(20px);background:var(--ink);color:#F6F1E6;
  padding:12px 22px;border-radius:999px;font-size:12px;letter-spacing:.14em;opacity:0;transition:.5s var(--ease);z-index:200;pointer-events:none}
.toast.on{opacity:1;transform:translateX(-50%)}

/* responsive */
@media (max-width:1180px){
  .hero{grid-template-columns:1fr;gap:44px;padding-top:104px}
  .hero h1{font-size:clamp(46px,9vw,84px)}
  .cast{max-width:560px}
  .res-body{grid-template-columns:1fr;gap:40px}
  .pan-col{display:grid;grid-template-columns:repeat(2,1fr)}
  .corpus{grid-template-columns:1fr}
  .toc{position:static;flex-direction:row;overflow:auto;max-height:none;gap:6px}
  .rail{display:none}
  .zihua-wrap{grid-template-columns:1fr}
}
@media (max-width:760px){
  .hd{padding:0 20px;height:64px;gap:10px}
  .nav{display:none}
  .burger{display:grid}
  .hero,.sec{padding-left:20px;padding-right:20px}
  .hero{padding-top:100px}
  .sec{padding-top:80px;padding-bottom:80px}
  .hero h1{font-size:clamp(40px,12vw,64px)}
  .grid64{grid-template-columns:repeat(4,1fr)}
  .sec-h{flex-direction:column;align-items:flex-start;gap:14px}
  .row2,.row3{grid-template-columns:1fr}
  .ov-in{padding:76px 20px 60px}
  .pan-col{grid-template-columns:1fr}
  .res-hd{flex-direction:column;align-items:flex-start}
  .hero-meta{gap:26px;flex-wrap:wrap}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms!important;transition-duration:.01ms!important}
}

/* 心易要诀：六条内容，固定 3/2/1 列，任何宽度都能整除，不会留下露灰底的空格 */
.xin-grid{
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:1px;background:var(--line);border:1px solid var(--line);
  border-radius:16px;overflow:hidden;
}
@media (max-width:1180px){ .xin-grid{grid-template-columns:repeat(2,1fr)} }
@media (max-width:760px){ .xin-grid{grid-template-columns:1fr} }

/* plain reading */
.plain-card .seg{padding:16px 0;border-bottom:1px solid var(--line);opacity:0;transform:translateY(8px);animation:segIn .6s var(--ease) forwards}
.plain-card .seg:last-child{border-bottom:none;padding-bottom:2px}
.plain-card h5{font-family:var(--serif);font-size:13px;font-weight:500;letter-spacing:.22em;color:var(--cinnabar);margin:0 0 8px}
.plain-card p{font-size:14px;line-height:2;color:var(--ink-2);margin:0;letter-spacing:.01em}
@keyframes segIn{to{opacity:1;transform:none}}

/* ===== version + catalog ===== */
.ver-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1px;background:var(--line);border:1px solid var(--line);border-radius:16px;overflow:hidden;margin-bottom:44px}
.ver-card{background:var(--paper);padding:26px 24px 22px;transition:background .4s var(--ease)}
.ver-card:hover{background:#FCFAF5}
.vc-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}
.vc-k{font-family:var(--latin);font-size:9.5px;letter-spacing:.34em;color:var(--cinnabar)}
.vc-n{font-size:10.5px;letter-spacing:.16em;color:var(--ink-3)}
.ver-card b{font-family:var(--serif);font-size:20px;font-weight:500;letter-spacing:.12em;display:block}
.vc-sub{font-size:11.5px;letter-spacing:.06em;color:var(--ink-3);margin:6px 0 2px;line-height:1.6}
.vc-meta{font-size:10.5px;letter-spacing:.12em;color:var(--ink-4);margin-bottom:12px}
.ver-card p{font-size:12.5px;line-height:1.9;color:var(--ink-2);margin:0}

.catalog-wrap{display:grid;grid-template-columns:minmax(260px,360px) 1fr;gap:56px;align-items:start}
.cat-list{display:flex;flex-direction:column;gap:1px;max-height:560px;overflow:auto;padding-right:6px}
.cat-group{font-family:var(--latin);font-size:9.5px;letter-spacing:.36em;color:var(--cinnabar);padding:18px 12px 8px;position:sticky;top:0;background:var(--paper);z-index:1}
.cat-group:first-child{padding-top:4px}
.cat-item{display:flex;justify-content:space-between;align-items:baseline;gap:14px;text-align:left;padding:10px 12px;border-radius:9px;transition:.3s var(--ease)}
.cat-item:hover{background:rgba(23,21,18,.04)}
.cat-item.on{background:var(--ink);color:#F6F1E6}
.cat-item.on .ci-c{color:rgba(246,241,230,.55)}
.ci-t{font-family:var(--serif);font-size:13.5px;letter-spacing:.08em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ci-c{font-family:var(--latin);font-size:9.5px;letter-spacing:.1em;color:var(--ink-4)}

.cat-detail{position:sticky;top:96px;background:rgba(255,253,248,.6);border:1px solid var(--line);border-radius:20px;padding:38px 40px 34px;min-height:360px}
.cd-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}
.cd-ver{font-size:9.5px;letter-spacing:.34em;color:var(--cinnabar);border:1px solid rgba(166,63,48,.35);padding:5px 12px;border-radius:999px}
.cd-num{font-family:var(--latin);font-size:10px;letter-spacing:.2em;color:var(--ink-3)}
.cat-detail h3{font-family:var(--serif);font-size:32px;font-weight:500;letter-spacing:.14em;margin:0 0 18px}
.cd-sum{font-family:var(--serif);font-size:15px;line-height:2.05;color:#2A2620;margin:0 0 26px}
@media (max-width:980px){
  .catalog-wrap{grid-template-columns:1fr;gap:30px}
  .cat-list{max-height:none}
  .cat-detail{position:static;padding:28px 24px}
}

/* lunar hint */
.lunar-hint{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:-2px 0 14px;padding:9px 13px;border:1px dashed var(--line-2);border-radius:10px;background:rgba(23,21,18,.025);font-size:11.5px;letter-spacing:.05em;color:var(--ink-3);line-height:1.7}
.lunar-hint b{font-weight:500;color:var(--ink-2)}
.mini-link{font-size:11px;letter-spacing:.12em;color:var(--cinnabar);white-space:nowrap;padding:2px 0;border-bottom:1px solid rgba(166,63,48,.3);transition:opacity .3s}
.mini-link:hover{opacity:.7}