:root{
  --paper:#fdfbf7;
  --wash:#f5f5f5;
  --ink:#1a1a1a;
  --line:#e0e0e0;
  --mute:#55534f;
  --r:28px;
  --sh:0 16px 34px -26px rgba(26,26,26,.65);
  --serif:'Cinzel',Georgia,'Songti SC','Noto Serif SC','SimSun',serif;
  --read:Georgia,'Songti SC','Noto Serif SC','SimSun',serif;
  --sans:'Josefin Sans','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;min-height:100vh;
  background:var(--paper);color:var(--ink);
  font-family:var(--read);font-size:17px;line-height:1.78;letter-spacing:.01em;
}
body::after{
  content:"";position:fixed;inset:0;z-index:30;pointer-events:none;opacity:.26;
  mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='150' height='150'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2'/%3E%3C/filter%3E%3Crect width='150' height='150' filter='url(%23n)' opacity='.42'/%3E%3C/svg%3E");
}
img{display:block;max-width:100%;height:auto}
a{color:var(--ink);text-underline-offset:3px;text-decoration-thickness:1px}
a:hover{text-decoration-style:wavy}
:focus-visible{outline:2px solid var(--ink);outline-offset:3px}

/* 顶栏 */
.mast{
  position:sticky;top:0;z-index:40;
  display:flex;align-items:center;gap:14px;
  padding:10px 20px;background:var(--paper);
  border-bottom:1px solid var(--line);
}
.mark{
  display:inline-flex;align-items:center;gap:8px;min-height:40px;padding:0 4px;
  text-decoration:none;font-family:var(--serif);font-size:17px;letter-spacing:.14em;
  white-space:nowrap;
}
.mark-glyph{font-size:18px;line-height:1}
.menu{flex:1 1 auto;min-width:0;overflow-x:auto;scrollbar-width:none}
.menu::-webkit-scrollbar{display:none}
.menu p{display:flex;gap:8px;margin:0;padding:2px 0;white-space:nowrap}
.menu a{
  display:inline-flex;align-items:center;min-height:40px;padding:0 14px;
  border:1px solid var(--line);border-radius:999px;background:var(--wash);
  font-family:var(--sans);font-size:16px;letter-spacing:.02em;text-decoration:none;
}
.menu a:hover{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.cta{
  display:inline-flex;align-items:center;min-height:40px;padding:0 18px;
  border-radius:999px;background:var(--ink);color:var(--paper);
  font-family:var(--sans);font-size:16px;text-decoration:none;white-space:nowrap;
}
.cta:hover{background:#000}

/* 版心：左侧栏 + 正文 */
.wrap{
  display:grid;grid-template-columns:204px minmax(0,1fr);gap:32px;align-items:start;
  max-width:1240px;margin:0 auto;padding:26px 20px 0;
}
.stage{min-width:0}
.rail{
  position:sticky;top:78px;
  border:1px solid var(--line);border-radius:var(--r);background:var(--wash);
  padding:20px 16px;box-shadow:var(--sh);
}
.rail-h{
  margin:0 0 12px;font-family:var(--sans);font-size:16px;font-weight:600;
  letter-spacing:.16em;color:var(--mute);
}
.rail-h span{display:inline-block;padding-bottom:5px;border-bottom:1px solid var(--ink);color:var(--ink)}
.rail-h2{margin-top:22px}
.rail-list{display:flex;flex-direction:column;margin:0;font-family:var(--sans);font-size:16px}
.rail-list a{
  display:flex;align-items:center;justify-content:space-between;
  min-height:40px;padding:0 2px;text-decoration:none;border-bottom:1px dotted var(--line);
}
.rail-list a::after{content:"›";color:var(--mute)}
.rail-list a:hover{background:var(--ink);color:var(--paper);padding-left:8px}
.rail-top a{display:inline-flex;align-items:center;min-height:40px;font-family:var(--sans);font-size:16px}

/* 头图 */
.hero{
  position:relative;overflow:hidden;
  display:grid;grid-template-columns:1.02fr 1fr;gap:24px;align-items:center;
  min-height:45vh;padding:28px;
  border:1px solid var(--line);border-radius:var(--r);background:var(--wash);
  box-shadow:var(--sh);
}
.hero-txt{order:2;text-align:right;position:relative;z-index:3;min-width:0}
.hero h1{
  margin:0 0 14px;font-family:var(--serif);font-weight:600;
  font-size:clamp(30px,5vw,58px);line-height:1.1;letter-spacing:.01em;
}
.lede{margin:0 0 0 auto;max-width:30ch;font-size:16px;line-height:1.7;color:var(--mute)}
.hero-art{order:1;position:relative;min-height:280px;align-self:stretch}
.hero-num{
  position:absolute;left:-10px;bottom:-32px;z-index:0;
  font-family:'Cinzel',serif;font-size:clamp(96px,15vw,180px);line-height:.8;
  color:#e8e4dc;letter-spacing:.04em;
}
.plate{
  position:absolute;margin:0;overflow:hidden;background:#fff;
  border:1px solid var(--line);border-radius:22px;box-shadow:var(--sh);
  will-change:transform;
}
.plate img{width:100%;height:100%;object-fit:cover}
.p1{left:0;top:0;width:64%;height:74%;z-index:1}
.p2{right:0;bottom:0;width:56%;height:60%;z-index:2}

/* 正文 */
.doc{min-width:0}
.doc > div{scroll-margin-top:84px}
.doc > div:not(.hero){
  margin-top:40px;padding-top:30px;border-top:1px solid var(--line);max-width:70ch;
}
.doc h2,.doc h3{font-family:var(--serif);font-weight:600;line-height:1.32;letter-spacing:.01em}
.doc h2{font-size:clamp(23px,3vw,30px);margin:0 0 16px}
.doc h2 span{display:inline-block;padding:0 0 6px;border-bottom:2px solid var(--ink)}
.doc h3{font-size:19px;margin:26px 0 10px}
.doc h3 span{display:inline-block;padding-bottom:2px;border-bottom:1px solid var(--line)}
.doc p{margin:0 0 15px}
.doc ul,.doc ol{margin:0 0 15px;padding-left:1.25em}
.doc li{margin:0 0 7px}
.doc strong{font-weight:700}
.doc blockquote{
  margin:20px 0;padding:4px 0 4px 18px;border-left:3px solid var(--ink);color:var(--mute);
}
.doc blockquote p:last-child{margin:0}
.doc img{border:1px solid var(--line);border-radius:16px;margin:14px 0}
.doc table{width:100%;border-collapse:collapse;margin:0 0 18px;font-size:16px}
.doc th,.doc td{border:1px solid var(--line);padding:9px 11px;text-align:left;vertical-align:top}
.doc th{background:var(--wash)}
.doc code{font-size:16px;background:var(--wash);border:1px solid var(--line);border-radius:6px;padding:1px 5px}
.doc pre{overflow-x:auto;background:var(--wash);border:1px solid var(--line);border-radius:16px;padding:14px}
.doc pre code{border:0;background:none;padding:0}
.doc hr{border:0;border-top:1px solid var(--line);margin:26px 0}

/* 页脚 */
.foot{
  max-width:1240px;margin:60px auto 0;padding:34px 20px 30px;
  border-top:1px solid var(--line);
  display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:14px 26px;
  font-family:var(--sans);
}
.foot p{margin:0}
.foot-mark{font-family:var(--serif);font-size:21px;letter-spacing:.14em}
.foot-col{display:flex;flex-direction:column;font-size:16px}
.foot-col a{
  display:flex;align-items:center;min-height:40px;text-decoration:none;
  border-bottom:1px dotted var(--line);
}
.foot-col a:hover{background:var(--wash)}
.foot-legal{
  grid-column:1/-1;margin-top:14px;padding-top:14px;border-top:1px solid var(--line);
  font-size:16px;color:var(--mute);
}

/* 揭示（瞬时） */
.js .doc > div.rev{opacity:0;transform:translateY(10px)}
.js .doc > div.rev.in{opacity:1;transform:none;transition:opacity .18s linear,transform .18s linear}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  .js .doc > div.rev{opacity:1;transform:none;transition:none}
  .plate,.hero-num{transform:none !important}
}

@media (max-width:900px){
  .wrap{grid-template-columns:minmax(0,1fr);gap:0;padding:16px 14px 0}
  .stage{order:1}
  .rail{order:2;position:static;margin-top:34px}
  .hero{grid-template-columns:minmax(0,1fr);min-height:0;padding:22px;gap:18px}
  .hero-txt{order:1;text-align:left}
  .lede{margin-left:0;max-width:none}
  .hero-art{order:2;min-height:230px}
  .doc > div:not(.hero){max-width:none}
  .foot{grid-template-columns:1fr 1fr;padding:26px 14px}
  .foot-mark{grid-column:1/-1}
}
@media (max-width:560px){
  .mast{flex-wrap:wrap;padding:10px 14px;gap:10px}
  .menu{order:3;flex-basis:100%}
  .cta{margin-left:auto}
  .doc > div{scroll-margin-top:132px}
  .foot{grid-template-columns:1fr}
  .hero{padding:20px}
  .hero h1{font-size:clamp(27px,8vw,38px)}
}

button[aria-expanded]{min-width:44px;min-height:44px}