:root{
  --bg:#141416;
  --surface:#1c1c1f;
  --surface-2:#252528;
  --ink:#ece8e3;
  --muted:#9a9590;
  --line:#333338;
  --amber:#d97706;
  --amber-light:#f59e0b;
  --amber-glow:rgba(217,119,6,.18);
  --rail-w:248px;
  --max:820px;
  --shadow:0 24px 56px rgba(0,0,0,.45);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.88;
}
a{color:var(--amber-light)}
a:hover{color:#fbbf24}
img{max-width:100%;height:auto;display:block}

.top-strip{
  background:linear-gradient(90deg,#0f0f11,var(--surface));
  border-bottom:1px solid var(--line);
  color:var(--muted);
  font-size:.82rem;
  padding:.42rem 1rem;
  display:flex;justify-content:space-between;align-items:center;gap:.75rem;
}
.top-strip b{color:var(--amber-light);font-weight:600}

.rail-shell{display:flex;min-height:calc(100vh - 34px)}
.rail{
  width:var(--rail-w);
  flex-shrink:0;
  background:var(--surface);
  border-right:1px solid var(--line);
  position:sticky;top:0;height:calc(100vh - 34px);
  overflow-y:auto;
  display:flex;flex-direction:column;
}
.rail-brand{
  padding:1.35rem 1.25rem 1rem;
  border-bottom:1px solid var(--line);
}
.rail-brand a{display:flex;align-items:center;gap:.7rem;text-decoration:none;color:inherit}
.rail-brand img{width:42px;height:42px;border-radius:10px;border:1px solid var(--line)}
.rail-brand b{display:block;font-size:1.02rem;color:var(--ink)}
.rail-brand span{font-size:.74rem;color:var(--muted)}
.rail-nav{flex:1;padding:.75rem 0}
.rail-nav section{padding:0 .85rem;margin-bottom:.5rem}
.rail-nav h3{
  margin:0 0 .35rem;padding:0 .4rem;
  font-size:.68rem;text-transform:uppercase;letter-spacing:.12em;
  color:var(--muted);font-weight:600;
}
.rail-nav a{
  display:block;padding:.52rem .75rem;margin:.12rem 0;
  border-radius:8px;text-decoration:none;color:var(--ink);font-size:.9rem;
  border-left:3px solid transparent;
}
.rail-nav a:hover,.rail-nav a.active{
  background:var(--amber-glow);color:var(--amber-light);
  border-left-color:var(--amber);
}
.rail-nav a.btn-rail{
  margin:.5rem .85rem 0;background:var(--amber);color:#1a1006;
  font-weight:700;text-align:center;border-left:none;
}
.rail-nav a.btn-rail:hover{background:var(--amber-light);color:#1a1006}
.rail-foot{
  padding:1rem 1.25rem;border-top:1px solid var(--line);
  font-size:.76rem;color:var(--muted);
}
.rail-foot a{display:block;margin:.25rem 0;color:var(--muted);font-size:.78rem}

.rail-main{flex:1;min-width:0;background:var(--bg)}
.rail-content{
  max-width:calc(var(--max) + 4rem);
  margin:0 auto;padding:1.5rem clamp(1rem,3vw,2rem) 3rem;
}

.rail-toggle{
  display:none;position:fixed;bottom:1.25rem;right:1.25rem;z-index:50;
  width:52px;height:52px;border-radius:14px;border:none;
  background:var(--amber);color:#1a1006;cursor:pointer;
  box-shadow:var(--shadow);font-size:1.25rem;line-height:1;
}
.rail-overlay{display:none}

.ads-slot{margin-bottom:1.25rem}
.ads-wrap{margin:0;padding:.75rem 1rem 1rem;border:1px solid var(--line);border-radius:12px;background:var(--surface-2)}
.ads-head{margin:0;padding:0}
.applist-title{text-align:center;color:var(--muted);font-size:.92rem;margin:0 0 .55rem}
#applist{width:100%}
#ads{display:flex!important;justify-content:center;align-items:flex-start;flex-wrap:wrap;gap:12px;margin:0;padding:0;background:transparent}
#ads>div{display:flex!important;flex-direction:column;align-items:center;width:72px!important;min-width:72px;flex:0 0 72px}
#ads figure{margin:0;padding:0;width:72px;display:flex;flex-direction:column;align-items:center}
#ads a{display:block;width:65px;height:65px;border-radius:14px;overflow:hidden;text-decoration:none}
#ads img{width:65px!important;height:65px!important;object-fit:cover!important;border-radius:14px;display:block!important;border:0;background:#333}
#ads figcaption,#ads .caption{display:block;width:72px;margin-top:6px;font-size:11px!important;line-height:1.2;color:var(--muted);text-align:center;white-space:nowrap!important;overflow:hidden;text-overflow:ellipsis}

.doc-head{margin-bottom:1.75rem;padding-bottom:1.25rem;border-bottom:1px solid var(--line)}
.doc-head h1{
  margin:0 0 .65rem;font-size:clamp(1.55rem,3.5vw,2.15rem);
  line-height:1.32;color:var(--ink);
}
.doc-head .lede{color:var(--muted);font-size:1.02rem;margin:0;max-width:52ch}
.doc-meta{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:.85rem}
.doc-meta span{
  font-size:.78rem;padding:.28rem .65rem;border-radius:999px;
  background:var(--surface-2);border:1px solid var(--line);color:var(--amber-light);
}

.prose h2{
  margin:2rem 0 .75rem;font-size:1.28rem;color:var(--ink);
  padding-left:.75rem;border-left:3px solid var(--amber);
}
.prose h3{margin:1.35rem 0 .5rem;font-size:1.05rem;color:var(--amber-light)}
.prose p{margin:0 0 1rem;color:#c8c4bf}
.prose ul,.prose ol{margin:0 0 1rem;padding-left:1.35rem;color:#c8c4bf}
.prose li{margin-bottom:.35rem}

.figure-row{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
  gap:1rem;margin:1.25rem 0 1.5rem;
}
.figure-row figure{
  margin:0;background:var(--surface);border:1px solid var(--line);
  border-radius:12px;overflow:hidden;
}
.figure-row img{width:100%;aspect-ratio:16/10;object-fit:cover}
.figure-row figcaption{padding:.65rem .85rem;font-size:.82rem;color:var(--muted)}

.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:.85rem;margin:1rem 0 1.5rem}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:12px;
  padding:1rem 1.1rem;
}
.card h3{margin:0 0 .4rem;font-size:.98rem;color:var(--amber-light)}
.card p{margin:0;font-size:.88rem;color:var(--muted);line-height:1.65}

.amber-band{
  background:linear-gradient(135deg,rgba(217,119,6,.15),rgba(245,158,11,.08));
  border:1px solid rgba(217,119,6,.35);border-radius:14px;
  padding:1.25rem 1.35rem;margin:1.5rem 0;
}
.amber-band h2{margin:0 0 .5rem;font-size:1.1rem;border:none;padding:0;color:var(--amber-light)}
.amber-band p{margin:0;color:#c8c4bf}

.price-strip{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));
  gap:.75rem;margin:1rem 0;
}
.price-strip figure{margin:0;text-align:center}
.price-strip img{border-radius:10px;border:1px solid var(--line)}
.price-strip figcaption{font-size:.78rem;color:var(--muted);margin-top:.4rem}

.outlinks{
  display:flex;flex-wrap:wrap;gap:.65rem;margin:1.5rem 0;
}
.outlinks a{
  padding:.55rem 1rem;border-radius:999px;text-decoration:none;
  background:var(--surface-2);border:1px solid var(--line);
  color:var(--amber-light);font-size:.88rem;
}
.outlinks a:hover{border-color:var(--amber);background:var(--amber-glow)}

.faq details{
  background:var(--surface);border:1px solid var(--line);border-radius:10px;
  padding:.75rem 1rem;margin-bottom:.55rem;
}
.faq summary{cursor:pointer;font-weight:600;color:var(--ink)}
.faq p{margin:.55rem 0 0;font-size:.92rem;color:var(--muted)}

.site-footer{
  margin-top:2.5rem;padding-top:1.5rem;border-top:1px solid var(--line);
  font-size:.84rem;color:var(--muted);
}
.footer-links{display:flex;flex-wrap:wrap;gap:.65rem 1rem;margin-bottom:.75rem}
.footer-links a{color:var(--muted);text-decoration:none}
.footer-links a:hover{color:var(--amber-light)}

.page-simple .doc-head h1{font-size:1.65rem}
.simple-card{
  background:var(--surface);border:1px solid var(--line);border-radius:12px;
  padding:1.35rem 1.5rem;
}
.simple-card h2{font-size:1.08rem;color:var(--amber-light);margin:1.25rem 0 .5rem}
.simple-card h2:first-child{margin-top:0}
.simple-card p{color:#c8c4bf;margin:0 0 .85rem}

.error-page{
  min-height:100vh;display:flex;align-items:center;justify-content:center;
  padding:2rem;background:var(--bg);
}
.error-box{
  max-width:420px;text-align:center;background:var(--surface);
  border:1px solid var(--line);border-radius:16px;padding:2rem;
}
.error-box h1{font-size:3rem;margin:0;color:var(--amber);line-height:1}
.error-box p{color:var(--muted)}
.cta{
  display:inline-block;padding:.65rem 1.25rem;border-radius:999px;
  text-decoration:none;font-weight:700;margin-top:.5rem;
}
.cta-primary{background:var(--amber);color:#1a1006}
.cta-primary:hover{background:var(--amber-light);color:#1a1006}

@media (max-width:900px){
  .rail{
    position:fixed;left:0;top:34px;z-index:45;height:calc(100vh - 34px);
    transform:translateX(-100%);transition:transform .28s ease;
    box-shadow:var(--shadow);
  }
  .rail.open{transform:translateX(0)}
  .rail-overlay{
    display:none;position:fixed;inset:34px 0 0 0;background:rgba(0,0,0,.55);z-index:44;
  }
  .rail-overlay.show{display:block}
  .rail-toggle{display:flex;align-items:center;justify-content:center}
  .rail-shell{display:block}
  .rail-content{padding-top:1rem}
}