*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
body{font-family:"Noto Sans SC",system-ui,sans-serif;background:#fff;color:#1a1a1a;line-height:1.78;font-size:16px}
a{color:#0d9488;text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto;display:block}

.site-header{background:#fff;border-bottom:1px solid #e8e8e8;position:sticky;top:0;z-index:300}
.header-inner{max-width:1140px;margin:0 auto;padding:12px 20px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:10px;color:#111;font-weight:600;font-size:.98rem}
.brand em{font-style:normal;color:#0d9488;font-weight:700}
.site-nav ul{display:flex;flex-wrap:wrap;gap:6px 18px;list-style:none}
.site-nav a{color:#333;font-size:.92rem}
.site-nav a.active{color:#0d9488;font-weight:600}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{display:block;width:22px;height:2px;background:#333;margin:5px 0;border-radius:1px}

.ads-top-bar{background:#f8fafc;border-bottom:1px solid #e8e8e8;padding:10px 0}
#applist .applist-title{font-size:.85rem;color:#666;margin-bottom:8px}
#ads{display:flex;flex-wrap:wrap;gap:12px}

.offset-shell{max-width:1140px;margin:0 auto;padding:0 20px 56px;display:grid;grid-template-columns:200px 1fr;gap:32px;align-items:start}
.offset-rail{position:sticky;top:72px;padding-top:28px}
.offset-rail h2{font-size:.88rem;color:#64748b;text-transform:uppercase;letter-spacing:.06em;margin-bottom:12px}
.offset-rail ol{list-style:none;font-size:.86rem;line-height:2}
.offset-rail a{color:#475569;padding:2px 0;display:block;border-left:2px solid transparent;padding-left:10px}
.offset-rail a.is-active,.offset-rail a:hover{color:#0d9488;border-left-color:#0d9488}

.offset-hero{padding:36px 0 28px;border-bottom:1px solid #f0f0f0;margin-bottom:8px}
.offset-hero .hero-tag{display:inline-block;font-size:.82rem;color:#0f766e;background:#ccfbf1;padding:4px 12px;border-radius:999px;margin-bottom:12px}
.offset-hero h1{font-size:clamp(1.35rem,3.5vw,1.9rem);line-height:1.35;margin-bottom:14px;color:#111;max-width:680px}
.offset-hero .hero-lede{font-size:1.02rem;color:#444;max-width:720px;margin-bottom:10px}
.chip-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.chip-row span{font-size:.78rem;background:#f1f5f9;color:#475569;padding:4px 10px;border-radius:6px}

.offset-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:20px 24px;padding:28px 0}
.off-cell{background:#fff;border:1px solid #e8e8e8;border-radius:14px;padding:22px 24px;box-shadow:0 2px 8px rgba(15,23,42,.04)}
.off-cell h2{font-size:1.15rem;margin-bottom:12px;color:#111}
.off-cell p{margin-bottom:12px;color:#333;font-size:.96rem}
.off-cell figure{margin:16px 0 0}
.off-cell figcaption{font-size:.8rem;color:#777;margin-top:8px;text-align:center}

.off-span-7{grid-column:span 7}
.off-span-5{grid-column:span 5}
.off-span-8{grid-column:span 8}
.off-span-4{grid-column:span 4}
.off-span-12{grid-column:span 12}
.off-push-down{margin-top:32px}
.off-push-up{margin-top:-16px}
.off-nudge-left{margin-left:-12px}
.off-nudge-right{margin-right:-12px}

.note-box{background:#f0fdfa;border-left:4px solid #14b8a6;padding:14px 18px;margin:14px 0;border-radius:0 10px 10px 0;font-size:.94rem;color:#134e4a}

.faq-zone{padding:32px 0;border-top:1px solid #eee;margin-top:12px}
.faq-zone h2{font-size:1.2rem;margin-bottom:16px}
.faq-card{border:1px solid #e8e8e8;border-radius:12px;padding:16px 18px;margin-bottom:12px;background:#fafafa}
.faq-card h3{font-size:1rem;margin-bottom:8px;color:#111}

.related-zone{padding:24px 0;border-top:1px solid #eee}
.related-zone h2{font-size:1.05rem;margin-bottom:10px}
.related-zone ul{padding-left:1.2rem;line-height:1.9}

.site-footer{background:#f8fafc;border-top:1px solid #e8e8e8;padding:28px 20px;text-align:center;font-size:.88rem;color:#666}
.footer-links{display:flex;flex-wrap:wrap;justify-content:center;gap:8px 20px;margin-bottom:10px}
.footer-sub{font-size:.82rem;color:#94a3b8;margin-top:6px}
.prose-page{max-width:720px;margin:40px auto;padding:0 20px}
.prose-page h1{font-size:1.4rem;margin-bottom:16px}
.error-page{max-width:480px;margin:80px auto;padding:0 20px;text-align:center}

@media(max-width:960px){
  .offset-shell{grid-template-columns:1fr}
  .offset-rail{position:static;padding:16px 0;border-bottom:1px solid #eee}
  .offset-rail ol{display:flex;flex-wrap:wrap;gap:6px 14px}
  .offset-rail a{border-left:0;padding-left:0;background:#f1f5f9;padding:4px 10px;border-radius:6px;font-size:.82rem}
  .off-span-7,.off-span-5,.off-span-8,.off-span-4,.off-span-12{grid-column:span 12}
  .off-push-down,.off-push-up,.off-nudge-left,.off-nudge-right{margin:0}
}

@media(max-width:768px){
  .nav-toggle{display:block}
  .site-nav{position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:1px solid #eee;display:none;padding:12px 20px}
  .site-nav.is-open{display:block}
  .site-header{position:relative}
}