*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --ink:#1e293b;--muted:#64748b;--line:#e2e8f0;
  --indigo:#4338ca;--indigo-soft:#eef2ff;--gold:#d97706;--gold-soft:#fffbeb;
  --header-h:56px;--content:800px;
}
html{scroll-behavior:smooth}
body{font-family:"Noto Sans SC",system-ui,sans-serif;color:var(--ink);background:#fff;line-height:1.78;font-size:16px}
img{max-width:100%;height:auto;display:block}
a{color:var(--indigo);text-decoration:none}
a:hover{text-decoration:underline}

.site-header{position:sticky;top:0;z-index:200;background:#fff;border-bottom:2px solid var(--indigo)}
.header-inner{max-width:980px;margin:0 auto;padding:0 1rem;display:flex;align-items:center;justify-content:space-between;min-height:var(--header-h)}
.brand{display:flex;align-items:center;gap:.65rem;color:var(--ink);font-size:.9rem;text-decoration:none}
.brand:hover{text-decoration:none}
.brand em{font-style:normal;font-weight:700;color:var(--indigo)}
.brand span{line-height:1.3;max-width:320px}

.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:.5rem;flex-direction:column;gap:5px}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--ink);transition:transform .2s}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.site-nav ul{display:flex;gap:1.1rem;list-style:none}
.site-nav a{color:var(--muted);font-size:.88rem;text-decoration:none}
.site-nav a:hover,.site-nav a.active{color:var(--indigo);font-weight:600}

.ads-top-bar{background:var(--indigo-soft);border-bottom:1px solid var(--line);padding:.5rem 0}
#applist{display:flex;align-items:center;gap:1rem;flex-wrap:wrap}
.applist-title{font-size:.78rem;color:var(--muted);white-space:nowrap}
#ads{display:flex;gap:.75rem;flex-wrap:wrap}
.ads-item figure{margin:0;text-align:center}
.ads-item img{border-radius:8px}
.ads-item .caption{font-size:.68rem;color:var(--muted);margin-top:.2rem;max-width:65px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

.wrap{max-width:var(--content);margin:0 auto;padding:2rem 1.25rem 3.5rem}

.hero-strip{
  border-left:5px solid var(--gold);background:linear-gradient(105deg,var(--gold-soft) 0%,#fff 45%,var(--indigo-soft) 100%);
  padding:1.85rem 1.65rem 1.55rem;margin-bottom:2rem;border-radius:0 14px 14px 0;
  box-shadow:0 2px 12px rgba(67,56,202,.06);
}
.hero-kicker{display:inline-block;font-size:.74rem;font-weight:700;letter-spacing:.04em;color:var(--gold);text-transform:none;margin-bottom:.65rem}
.hero-strip h1{font-size:1.55rem;line-height:1.36;font-weight:700;margin-bottom:.8rem;color:#0f172a}
.hero-strip .lede{font-size:.98rem;color:var(--muted);margin-bottom:.55rem;text-align:justify}
.hero-chips{display:flex;flex-wrap:wrap;gap:.4rem;margin-top:1rem}
.hero-chips span{font-size:.74rem;background:#fff;border:1px solid var(--line);color:var(--muted);padding:.2rem .58rem;border-radius:4px}

.accord-wrap{display:flex;flex-direction:column;gap:.55rem}
.accord-item{
  border:1px solid var(--line);border-radius:10px;background:#fff;
  border-left:4px solid transparent;transition:border-color .25s,box-shadow .25s,transform .2s;
}
.accord-item.is-active{border-left-color:var(--indigo);box-shadow:0 8px 28px rgba(67,56,202,.09);transform:translateX(2px)}
.accord-head{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:1rem;
  padding:1rem 1.15rem;background:transparent;border:none;cursor:pointer;font:inherit;text-align:left;color:var(--ink);
}
.accord-head:hover{background:var(--indigo-soft)}
.accord-head .accord-title{flex:1;font-weight:600;font-size:.96rem;line-height:1.45;padding-left:.35rem}
.accord-head .accord-chev{
  flex-shrink:0;width:10px;height:10px;border-right:2px solid var(--indigo);border-bottom:2px solid var(--indigo);
  transform:rotate(45deg);transition:transform .28s;margin-top:-4px;
}
.accord-item.is-active .accord-chev{transform:rotate(-135deg);margin-top:4px}
.accord-body{
  max-height:0;overflow:hidden;transition:max-height .35s ease;
  border-top:0 solid var(--line);
}
.accord-item.is-active .accord-body{max-height:4000px;border-top-width:1px}
.accord-inner{padding:1.1rem 1.25rem 1.35rem 1.5rem}
.accord-inner p{margin-bottom:.92rem;text-align:justify;color:#334155}
.accord-inner h2{font-size:1.04rem;color:var(--indigo);margin-bottom:.7rem;font-weight:600}
.accord-inner figure{margin:1.15rem 0;border-radius:8px;overflow:hidden;border:1px solid var(--line)}
.accord-inner figcaption{font-size:.81rem;color:var(--muted);padding:.48rem .7rem;background:var(--gold-soft);text-align:center}
.accord-inner ul,.accord-inner ol{margin:.65rem 0 1rem 1.15rem;color:#334155}
.accord-inner li{margin-bottom:.4rem}
.tip-line{background:var(--gold-soft);border-left:3px solid var(--gold);padding:.75rem .95rem;border-radius:0 6px 6px 0;font-size:.91rem;margin:1rem 0;color:#78350f}

.foot-links{display:flex;flex-wrap:wrap;gap:.65rem;margin-top:2rem;padding-top:1.4rem;border-top:1px dashed var(--line)}
.foot-links a{font-size:.85rem;color:var(--muted);background:var(--indigo-soft);padding:.32rem .8rem;border-radius:6px}
.foot-links a:hover{color:var(--indigo);text-decoration:none}

.prose-page{max-width:var(--content);margin:0 auto;padding:2rem 1.25rem 3rem}
.prose-page h1{font-size:1.48rem;margin-bottom:1rem;color:var(--indigo)}
.prose-page p{margin-bottom:.95rem}

.error-page{max-width:var(--content);margin:4rem auto;padding:2rem 1.25rem;text-align:center}
.error-page h1{font-size:3rem;color:var(--indigo);margin-bottom:.5rem}

.site-footer{background:var(--indigo-soft);border-top:2px solid var(--indigo);padding:1.5rem 1rem;text-align:center;font-size:.82rem;color:var(--muted)}
.footer-links{display:flex;flex-wrap:wrap;justify-content:center;gap:.5rem 1rem;margin-bottom:.65rem}
.footer-links a{color:var(--muted)}
.footer-sub{font-size:.76rem;margin-top:.35rem;color:#94a3b8}

@media(max-width:640px){
  .nav-toggle{display:flex}
  .site-nav{position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);padding:.75rem 1rem;display:none;box-shadow:0 4px 14px rgba(0,0,0,.06)}
  .site-nav.is-open{display:block}
  .site-nav ul{flex-direction:column;gap:0}
  .site-nav li{border-bottom:1px solid var(--line)}
  .site-nav a{display:block;padding:.65rem 0}
  .hero-strip h1{font-size:1.28rem}
  .accord-head{padding:.88rem 1rem}
}