*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
img{max-width:100%;height:auto;display:block}
ul{list-style:none}
.container{width:min(1100px,92%);margin:0 auto}
.site-header{position:sticky;top:0;z-index:40;background:#fff;border-bottom:1px solid var(--line)}
.header-row{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--ink);text-decoration:none}
.brand img{border-radius:8px}
.brand b{color:var(--accent);font-weight:700}
.nav-toggle{display:none;width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:10px;flex-direction:column;justify-content:center;align-items:center;gap:5px}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink)}
.site-nav ul{display:flex;gap:18px;flex-wrap:wrap}
.site-nav a{color:var(--muted);font-size:14px;text-decoration:none}
.site-nav a:hover,.site-nav a.active{color:var(--accent)}
.ads-top-bar{background:var(--ads-bg);border-bottom:1px solid var(--line);padding:10px 0}
.applist-title{font-size:13px;font-weight:700;margin-bottom:8px;color:var(--ink)}
#ads{display:flex;gap:12px;overflow-x:auto;padding-bottom:4px}
#ads figure{width:65px}
#ads .caption{font-size:11px;text-align:center;margin-top:4px;color:var(--muted);line-height:1.3}
.site-footer{border-top:1px solid var(--line);padding:28px 0 40px;margin-top:48px;background:#fff}
.footer-links{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:10px}
.footer-links a{color:var(--muted);font-size:13px;text-decoration:none}
.footer-links a:hover{color:var(--accent)}
.site-footer p{color:var(--muted);font-size:13px;line-height:1.7}
.prose-page{padding:36px 0 20px;max-width:720px}
.prose-page h1{font-size:1.6rem;margin-bottom:14px;color:var(--ink)}
.prose-page p{margin-bottom:12px;color:var(--muted)}
.error-page{padding:48px 0 8px;text-align:center}
.error-page h1{font-size:3rem;color:var(--accent)}
figure{margin:16px 0}
figcaption{font-size:13px;color:var(--muted);margin-top:8px;line-height:1.5}
.sec-nav{margin:8px 0 28px;padding:12px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-nav ul{display:flex;flex-wrap:wrap;gap:10px 16px}
.sec-nav a{font-size:13px;color:var(--muted);text-decoration:none}
.sec-nav a:hover{color:var(--accent)}
.faq details{border:1px solid var(--line);border-radius:12px;padding:12px 16px;margin-bottom:10px;background:#fff}
.faq summary{cursor:pointer;font-weight:600;color:var(--ink)}
.faq details p{margin-top:8px;color:var(--muted);font-size:15px}
@media (max-width:860px){
  .nav-toggle{display:flex}
  .site-nav{display:none;position:absolute;left:0;right:0;top:64px;background:#fff;border-bottom:1px solid var(--line);padding:12px 4%}
  .site-nav.is-open{display:block}
  .site-nav ul{flex-direction:column;gap:10px}
}

:root{--accent:#0d9488;--ink:#134e4a;--muted:#3f3f46;--line:#ccfbf1;--ads-bg:#f0fdfa}
body{font-family:"Noto Sans SC",sans-serif;background:#fff;color:var(--ink);line-height:1.78}
a{color:var(--accent)}
.hero{padding:34px 0 8px}
.hero .tag{font-family:"DM Sans",sans-serif;color:var(--accent);font-weight:700;font-size:13px}
.hero h1{font-size:clamp(1.55rem,3vw,2.1rem);margin:8px 0 12px}
.hero .lead{color:var(--muted);max-width:46rem}
.tabs{margin:24px 0;border:1px solid var(--line);border-radius:16px;overflow:hidden;background:#fff}
.tab-list{display:flex;flex-wrap:wrap;gap:0;background:#f0fdfa;border-bottom:1px solid var(--line)}
.tab-btn{flex:1;min-width:120px;padding:12px 10px;border:0;background:transparent;cursor:pointer;font-family:"Noto Sans SC",sans-serif;font-size:14px;color:var(--muted)}
.tab-btn.is-on{background:#fff;color:var(--accent);font-weight:700;box-shadow:inset 0 -2px 0 var(--accent)}
.tab-panel{display:none;padding:18px 20px}
.tab-panel.is-on{display:block}
.tab-panel h2{font-size:1.12rem;margin-bottom:8px;color:var(--accent)}
.tab-panel p{color:var(--muted);margin-bottom:10px}
.wide{margin:28px 0}.wide h2{font-size:1.2rem;margin-bottom:8px}.wide p{color:var(--muted);margin-bottom:10px}