*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--bg:#fff;--ink:#1a1a1a;--muted:#555;--line:#e5e5e5;--accent:#0891b2;--max:1040px;--radius:10px}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{font-family:"Noto Sans SC",system-ui,sans-serif;background:var(--bg);color:var(--ink);line-height:1.82;font-size:16px}
img{max-width:100%;height:auto;display:block}
figure{margin:1.25rem 0}figure img{max-width:min(100%,560px);height:auto;border-radius:8px;margin:0 auto;box-shadow:0 4px 16px rgba(0,0,0,.06)}
figure figcaption{font-size:.78rem;color:var(--muted);text-align:center;margin-top:.45rem}
a{color:var(--accent);text-decoration:none}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:1px solid var(--line)}
.header-row{display:flex;align-items:center;justify-content:space-between;min-height:64px;gap:1rem}
.brand{display:flex;align-items:center;gap:.6rem;font-weight:600;color:var(--ink)}.brand img{border-radius:8px}
.site-nav ul{display:flex;gap:1rem;list-style:none;flex-wrap:wrap}
.site-nav a{color:var(--muted);font-size:.95rem}.site-nav a.active,.site-nav a:hover{color:var(--accent)}
.nav-toggle{display:none;border:1px solid var(--line);width:42px;height:42px;border-radius:8px;cursor:pointer;flex-direction:column;justify-content:center;align-items:center;gap:5px;background:none;padding:6px}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--ink)}
.ads-top-bar{border-bottom:1px solid var(--line);background:#fafafa;padding:.5rem 0}
.applist-title{font-size:.78rem;color:var(--muted);text-align:center;margin-bottom:.35rem}
#ads{display:flex;justify-content:center;flex-wrap:wrap;gap:.5rem}
.ext-links{display:flex;flex-wrap:wrap;gap:.75rem;padding:1rem 0;border-bottom:1px solid var(--line)}
.ext-links a{padding:.45rem .9rem;border:1px solid var(--line);border-radius:999px;font-size:.88rem;color:var(--ink);background:#fff}
.ext-links a:hover{border-color:var(--accent);color:var(--accent);text-decoration:none}
.hero{padding:2rem 0 1rem;border-bottom:1px solid var(--line)}
.hero h1{font-size:clamp(1.5rem,3.5vw,2rem);margin-bottom:1rem;line-height:1.35}
.lead{color:#333;margin-bottom:1.25rem;font-size:1.05rem}
.split-layout{display:grid;grid-template-columns:200px 1fr;gap:2.5rem;padding:2rem 0}
.side-nav{position:sticky;top:80px;align-self:start;background:#f0fdfa;border:1px solid #99f6e4;border-radius:var(--radius);padding:1.25rem}
.side-nav h2{font-size:.75rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin-bottom:.75rem}
.side-nav ol{list-style:none;counter-reset:sn}
.side-nav li{counter-increment:sn;margin-bottom:.5rem}
.side-nav a{font-size:.88rem;color:var(--muted);display:block;padding:.25rem 0 .25rem .75rem;border-left:2px solid transparent}
.side-nav a:hover{color:var(--accent);border-color:var(--accent);text-decoration:none}
.main-col section{margin-bottom:2.25rem;padding-bottom:2rem;border-bottom:1px solid var(--line)}
.main-col h2{font-size:1.25rem;color:var(--accent);margin-bottom:1rem}
.main-col p{margin-bottom:1rem;text-align:justify}
.faq-block details{border:1px solid var(--line);border-radius:var(--radius);padding:1rem;margin-bottom:.75rem;background:#fafafa}
.faq-block summary{cursor:pointer;font-weight:600}
.page-head{padding:2rem 0 1rem;border-bottom:1px solid var(--line)}.breadcrumb{font-size:.86rem;color:var(--muted);margin-bottom:.5rem}
.prose-page{padding:2rem 0 3rem}.prose-page h2{color:var(--accent);margin:1.5rem 0 1rem}.prose-page p{margin-bottom:1rem;text-align:justify}
.related-read{margin:2rem 0 3rem;padding:1.5rem;border:1px solid var(--line);border-radius:var(--radius);background:#fafafa}
.related-grid{display:flex;flex-wrap:wrap;gap:.75rem}.related-grid a{padding:.4rem .85rem;border:1px solid var(--line);border-radius:6px;font-size:.88rem;color:var(--ink);background:#fff}
.related-grid a:hover{border-color:var(--accent);color:var(--accent);text-decoration:none}
.site-footer{border-top:1px solid var(--line);padding:2rem 0;text-align:center;color:var(--muted);font-size:.88rem}
.footer-links{display:flex;flex-wrap:wrap;justify-content:center;gap:1rem;margin-bottom:.75rem}.footer-links a{color:var(--muted)}
.error-page{min-height:60vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:3rem 0}.error-page h1{font-size:4rem;color:var(--accent)}
@media(max-width:768px){.nav-toggle{display:flex}.site-nav{display:none;position:absolute;top:64px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);padding:1rem}.site-nav.is-open{display:block}.site-nav ul{flex-direction:column}.split-layout{grid-template-columns:1fr}.side-nav{position:static}}