*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--accent:#059669;--accent-light:#d1fae5;--accent-dark:#047857;--ink:#064e3b;--muted:#6b7280;--line:#a7f3d0;--max:960px;--header-h:64px}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 1rem)}
body{font-family:"Noto Sans SC",system-ui,sans-serif;background:#ecfdf5;color:var(--ink);line-height:1.82;font-size:16px}
img{max-width:100%;height:auto;display:block}
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:200;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-bottom:2px solid var(--accent)}
.header-row{display:flex;align-items:center;justify-content:space-between;min-height:var(--header-h);position:relative}
.brand{display:flex;align-items:center;gap:.6rem;font-weight:600;color:var(--ink);text-decoration:none}
.brand b{color:var(--accent)}
.site-nav ul{display:flex;gap:1rem;list-style:none}
.site-nav a{color:var(--muted);font-size:.93rem;text-decoration:none}
.site-nav a.active,.site-nav a:hover{color:var(--accent-dark)}
.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}
.ads-top-bar{border-bottom:1px solid var(--line);padding:.5rem 0;background:#fff}
.applist-title{font-size:.76rem;color:var(--muted);text-align:center;margin-bottom:.35rem}
#ads{display:flex;justify-content:center;flex-wrap:wrap;gap:.4rem}
.hero-sticky{padding:2rem 0 1rem}
.hero-sticky h1{font-size:clamp(1.35rem,3vw,1.85rem);line-height:1.35;margin-bottom:1rem;color:var(--ink)}
.hero-sticky .lead{color:#334155;margin-bottom:.75rem;font-size:1.02rem}
.link-strip{display:flex;flex-wrap:wrap;gap:.65rem;padding:1.25rem 0;border-bottom:2px solid var(--line)}
.link-strip a{padding:.4rem .9rem;border:2px solid var(--accent);border-radius:8px;font-size:.85rem;color:var(--accent-dark);background:#fff;font-weight:500}
.link-strip a:hover{background:var(--accent);color:#fff;text-decoration:none}
.sticky-sections-wrap{padding:.5rem 0 1rem}
.sticky-section{display:grid;grid-template-columns:minmax(130px,200px) 1fr;gap:1.5rem 2rem;padding:2rem 0;border-bottom:1px solid var(--line);align-items:start}
.section-head{position:sticky;top:calc(var(--header-h) + .75rem);align-self:start;z-index:50;padding:.75rem 0}
.sec-num{display:block;font-size:.72rem;font-weight:700;color:var(--accent);letter-spacing:.08em;margin-bottom:.35rem}
.section-head h2{font-size:1.02rem;color:var(--accent-dark);line-height:1.4;font-weight:700}
.section-body p{margin-bottom:.85rem;text-align:justify;color:#334155;font-size:.96rem}
.section-body p:last-child{margin-bottom:0}
.content-fig{margin:1rem 0}
.content-fig img{width:100%;max-width:560px;border-radius:10px;border:1px solid var(--line)}
.content-fig figcaption{font-size:.76rem;color:var(--muted);margin-top:.35rem;text-align:center}
.faq{margin:2rem 0;padding-top:1.5rem;border-top:2px solid var(--accent)}
.faq h2{font-size:1.15rem;margin-bottom:1rem;color:var(--accent-dark)}
.faq details{border:1px solid var(--line);border-radius:10px;padding:.9rem;margin-bottom:.6rem;background:#fff}
.faq summary{cursor:pointer;font-weight:600;list-style:none;color:var(--ink)}
.faq summary::-webkit-details-marker{display:none}
.faq details p{padding-top:.75rem;font-size:.92rem;color:var(--muted)}
.related-read{margin:2rem 0 3rem;padding:1.2rem;border:2px solid var(--accent);border-radius:12px;background:var(--accent-light)}
.related-read h2{font-size:1rem;margin-bottom:1rem;color:var(--accent-dark)}
.related-grid{display:flex;flex-wrap:wrap;gap:.6rem}
.related-grid a{padding:.4rem .8rem;border:1px solid var(--line);border-radius:8px;font-size:.86rem;color:var(--ink);text-decoration:none;background:#fff}
.related-grid a:hover{border-color:var(--accent);color:var(--accent-dark)}
.page-head{padding:2rem 0 1rem;border-bottom:1px solid var(--line)}
.breadcrumb{font-size:.84rem;color:var(--muted);margin-bottom:.4rem}
.breadcrumb a{color:var(--muted)}
.prose-page{padding:2rem 0 3rem}
.prose-page h2{color:var(--accent-dark);margin:1.4rem 0 .8rem;font-size:1.1rem}
.prose-page p{margin-bottom:.9rem;text-align:justify;color:#334155}
.site-footer{border-top:2px solid var(--line);padding:1.6rem 0;text-align:center;color:var(--muted);font-size:.86rem;background:#fff}
.footer-links{display:flex;justify-content:center;gap:1rem;margin-bottom:.5rem;flex-wrap:wrap}
.footer-links a{color:var(--muted);text-decoration:none}
.error-page{min-height:50vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:2rem}
.error-page h1{font-size:3.5rem;color:var(--accent)}
@media(max-width:768px){
  .nav-toggle{display:flex}
  .site-nav{position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:2px solid var(--line);padding:1rem;display:none;box-shadow:0 8px 24px rgba(0,0,0,.06)}
  .site-nav.is-open{display:block}
  .site-nav ul{flex-direction:column}
  .sticky-section{grid-template-columns:1fr;gap:.75rem;padding:1.5rem 0}
  .section-head{position:sticky;top:var(--header-h);background:rgba(236,253,245,.96);backdrop-filter:blur(6px);padding:.65rem 0;margin:0 -1rem;padding-left:1rem;padding-right:1rem;border-bottom:1px solid var(--line)}
}