*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
body{font-family:"Noto Sans SC",system-ui,sans-serif;background:#fff;color:#1e293b;line-height:1.78;font-size:16px}
a{color:#4f46e5;text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto;display:block}

.site-header{background:#fff;border-bottom:1px solid #e2e8f0;position:sticky;top:0;z-index:200}
.header-inner{max-width:1160px;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:#0f172a;font-weight:600;font-size:.98rem}
.brand em{font-style:normal;color:#4f46e5;font-weight:700}
.site-nav ul{display:flex;flex-wrap:wrap;gap:6px 18px;list-style:none}
.site-nav a{color:#64748b;font-size:.92rem}
.site-nav a.active{color:#4f46e5;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:#334155;margin:5px 0;border-radius:1px}

.ads-top-bar{background:#f8fafc;border-bottom:1px solid #e2e8f0;padding:10px 0}
#applist .applist-title{font-size:.85rem;color:#94a3b8;margin-bottom:8px}
#ads{display:flex;flex-wrap:wrap;gap:12px}

.content-frame{max-width:1160px;margin:0 auto;padding:0 20px 56px}

.intro-block{background:linear-gradient(160deg,#eef2ff 0%,#fff 42%,#fffbeb 100%);border:1px solid #c7d2fe;border-radius:22px;padding:34px 30px 28px;margin:28px 0 18px}
.intro-block h1{font-size:clamp(1.32rem,3.5vw,1.88rem);line-height:1.33;margin-bottom:14px;color:#0f172a}
.intro-label{display:inline-block;font-size:.81rem;color:#4338ca;background:#e0e7ff;padding:5px 14px;border-radius:999px;margin-bottom:12px;font-weight:500}
.intro-text{font-size:1.02rem;color:#475569;max-width:700px}

.jump-links{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0 6px;padding:0;list-style:none}
.jump-links a{display:inline-block;font-size:.84rem;padding:6px 14px;border:1px solid #cbd5e1;border-radius:999px;color:#475569;background:#f8fafc}
.jump-links a:hover{border-color:#4f46e5;color:#4f46e5;text-decoration:none}

.mosaic-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:17px;margin:24px 0}
.mosaic-tile{background:#fff;border:1px solid #e2e8f0;border-radius:17px;padding:22px 24px;overflow:hidden}
.mosaic-tile h2{font-size:1.11rem;margin-bottom:10px;color:#0f172a;line-height:1.36}
.mosaic-tile p{margin-bottom:10px;color:#475569;font-size:.95rem}
.mosaic-tile p:last-child{margin-bottom:0}
.mosaic-tile figure{margin:0}
.mosaic-tile figcaption{font-size:.79rem;color:#94a3b8;margin-top:8px;text-align:center}

.col-9{grid-column:span 9}
.col-8{grid-column:span 8}
.col-7{grid-column:span 7}
.col-6{grid-column:span 6}
.col-5{grid-column:span 5}
.col-4{grid-column:span 4}
.col-3{grid-column:span 3}
.col-12{grid-column:span 12}

.tile-indigo{background:#eef2ff;border-color:#a5b4fc}
.tile-amber{background:#fffbeb;border-color:#fcd34d}
.tile-stretch{min-height:100%}

.metric-pill{display:inline-flex;align-items:center;gap:6px;font-size:.84rem;color:#4338ca;background:#e0e7ff;padding:6px 13px;border-radius:8px;margin:8px 0 4px;font-weight:500}
.metric-pill::before{content:"";width:7px;height:7px;border-radius:50%;background:#6366f1}

.step-list{list-style:none;padding:0;margin:12px 0}
.step-list li{position:relative;padding:9px 0 9px 30px;border-bottom:1px dashed #e2e8f0;font-size:.93rem;color:#475569}
.step-list li:last-child{border-bottom:0}
.step-list li::before{content:attr(data-n);position:absolute;left:0;width:22px;height:22px;line-height:22px;text-align:center;font-size:.75rem;font-weight:700;color:#fff;background:#6366f1;border-radius:6px}

.callout{background:#f8fafc;border-left:4px solid #f59e0b;padding:14px 18px;margin:14px 0;border-radius:0 10px 10px 0;font-size:.92rem;color:#475569}

.faq-block{margin-top:32px;padding-top:28px;border-top:1px solid #e2e8f0}
.faq-block>h2{font-size:1.14rem;margin-bottom:16px;color:#0f172a}
.faq-item{border:1px solid #e2e8f0;border-radius:12px;padding:16px 20px;margin-bottom:12px;background:#fff}
.faq-item h3{font-size:1rem;margin-bottom:8px;color:#0f172a}

.more-read{padding:24px 0 8px}
.more-read h2{font-size:1.04rem;margin-bottom:10px;color:#0f172a}
.more-read ul{padding-left:1.2rem;line-height:1.9;color:#475569}

.site-footer{background:#f8fafc;border-top:1px solid #e2e8f0;padding:28px 20px;text-align:center;font-size:.88rem;color:#94a3b8}
.footer-links{display:flex;flex-wrap:wrap;justify-content:center;gap:8px 20px;margin-bottom:10px}
.footer-sub{font-size:.82rem;margin-top:6px;color:#94a3b8}
.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){
  .col-9,.col-8,.col-7,.col-6,.col-5,.col-4,.col-3{grid-column:span 12}
}

@media(max-width:768px){
  .nav-toggle{display:block}
  .site-nav{position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:1px solid #e2e8f0;display:none;padding:12px 20px}
  .site-nav.is-open{display:block}
  .site-header{position:relative}
  .intro-block{padding:24px 18px}
  .mosaic-tile{padding:18px 16px}
}