*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--slate:#334155;--slate-light:#475569;--slate-soft:#f1f5f9;--teal:#0d9488;--amber:#d97706;--ink:#1e293b;--muted:#64748b;--line:#e2e8f0;--max:920px}
body{font-family:"Noto Sans SC",system-ui,sans-serif;background:#fff;color:var(--ink);line-height:1.85;font-size:16px}
img{max-width:100%;height:auto;display:block}
a{color:var(--slate)}a:hover{text-decoration:underline}
.container{width:min(100% - 2rem,var(--max));margin-inline:auto}
.site-header{position:sticky;top:0;z-index:100;background:#fff;border-bottom:3px solid var(--slate)}
.header-row{display:flex;align-items:center;justify-content:space-between;min-height:60px}
.brand{display:flex;align-items:center;gap:.55rem;font-weight:600;color:var(--ink);text-decoration:none}
.brand:hover{text-decoration:none;color:var(--slate)}
.site-nav ul{display:flex;gap:1rem;list-style:none}
.site-nav a{color:var(--muted);font-size:.92rem;text-decoration:none}
.site-nav a.active,.site-nav a:hover{color:var(--slate)}
.nav-toggle{display:none;border:1px solid var(--line);width:40px;height:40px;border-radius:8px;cursor:pointer;flex-direction:column;justify-content:center;align-items:center;gap:5px;background:#fff}
.nav-toggle span{width:20px;height:2px;background:var(--ink);display:block;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)}
.ads-top-bar{border-bottom:1px solid var(--line);padding:.45rem 0;background:var(--slate-soft)}
.applist-title{font-size:.75rem;color:var(--muted);text-align:center}
#ads{display:flex;justify-content:center;flex-wrap:wrap;gap:.4rem}
.ads-item figure{margin:0;text-align:center}
.ads-item img{width:65px;height:65px;border-radius:8px;object-fit:cover;border:1px solid var(--line)}
.ads-item .caption{font-size:11px;color:var(--muted);max-width:76px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.stack-wrap{display:flex;flex-direction:column;width:100%}
.stack-section{width:100%;padding:2.4rem 0;border-top:6px solid var(--stack-border)}
.stack-section:nth-child(odd){--stack-border:var(--slate);background:var(--slate-soft)}
.stack-section:nth-child(even){--stack-border:var(--teal);background:#fff}
.stack-section h2{font-size:clamp(1.1rem,2.5vw,1.35rem);color:var(--slate);margin-bottom:1rem;font-weight:700}
.stack-section p{margin-bottom:.9rem;text-align:justify;color:#334155;font-size:.98rem}
.stack-section figure{margin:1.2rem 0;border-radius:10px;overflow:hidden;border:1px solid var(--line);box-shadow:0 8px 24px rgba(51,65,85,.08)}
.stack-section figcaption{font-size:.74rem;color:var(--muted);padding:.45rem;text-align:center;background:#fff}
.hero-stack{padding:2.5rem 0 2rem}
.hero-stack h1{font-size:clamp(1.4rem,3.2vw,2rem);line-height:1.35;margin-bottom:1rem;color:var(--slate)}
.hero-stack .lead{color:#334155;text-align:justify;margin-bottom:.85rem;font-size:1.02rem}
.link-strip{display:flex;flex-wrap:wrap;gap:.65rem;padding:.75rem 0 .25rem}
.link-strip a{padding:.42rem .9rem;border:2px solid var(--slate);border-radius:6px;font-size:.88rem;color:var(--slate);background:#fff;text-decoration:none;font-weight:500}
.link-strip a:hover{background:var(--slate);color:#fff;text-decoration:none}
.callout-box{padding:1rem 1.15rem;background:#fff;border-left:5px solid var(--stack-border,var(--slate));border-radius:0 8px 8px 0;margin:1rem 0;font-size:.94rem;color:#334155;box-shadow:0 2px 8px rgba(51,65,85,.06)}
.faq-block .stack-section{border-top:6px solid var(--amber)}
.faq-block details{border:1px solid var(--line);border-radius:10px;padding:.95rem;margin-bottom:.65rem;background:#fff}
.faq-block summary{cursor:pointer;font-weight:600;color:var(--slate)}
.faq-block p{margin-top:.6rem;color:#334155;font-size:.95rem}
.related-read{margin:0;padding:2rem 0;background:#fff;border-top:6px solid var(--slate)}
.related-read h2{font-size:1.05rem;color:var(--slate);margin-bottom:.8rem}
.related-grid{display:flex;flex-wrap:wrap;gap:.55rem}
.related-grid a{padding:.4rem .8rem;border:1px solid var(--line);border-radius:8px;font-size:.86rem;color:var(--ink);text-decoration:none;background:var(--slate-soft)}
.related-grid a:hover{border-color:var(--slate);color:var(--slate)}
.page-head{padding:2rem 0 1rem;border-bottom:3px solid var(--slate)}
.breadcrumb{font-size:.84rem;color:var(--muted);margin-bottom:.4rem}
.prose-page{padding:2rem 0 3rem}
.prose-page h2{color:var(--slate);margin:1.3rem 0 .75rem;font-size:1.08rem}
.prose-page p{margin-bottom:.88rem;text-align:justify;color:#334155}
.site-footer{border-top:6px solid var(--slate);padding:1.5rem 0;text-align:center;color:var(--muted);font-size:.86rem;background:var(--slate-soft)}
.footer-links{display:flex;justify-content:center;gap:1rem;margin-bottom:.45rem;flex-wrap:wrap}
.footer-links a{color:var(--muted);text-decoration:none}
.footer-links a:hover{color:var(--slate)}
.error-page{min-height:50vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:2rem}
.error-page h1{font-size:3.2rem;color:var(--slate)}
@media(max-width:768px){
  .site-nav{position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);padding:1rem;display:none}
  .site-nav.is-open{display:block}.site-nav ul{flex-direction:column}.nav-toggle{display:flex}
}