:root{color-scheme:light;--bg:#FFFFFF;--tint:#F5F9F7;--mint:#E5F5EE;--sky:#EEF3FC;--ink:#0F1D2B;--body:#3D4C5A;--muted:#6A7783;--line:#E3E9EE;
--brand:#13976F;--brand-dark:#0C7756;--amber:#B97A06;--amber-soft:#FDF3DC;--red:#C93C3C;--red-soft:#FCE9E9;
--font:"Plus Jakarta Sans","Segoe UI",system-ui,-apple-system,Arial,sans-serif;--shadow:0 1px 2px rgba(15,29,43,.06),0 12px 32px -12px rgba(15,29,43,.18)}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:90px}
body{margin:0;background:var(--bg);color:var(--body);font-family:var(--font);font-size:1rem;line-height:1.65}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:60;background:var(--bg)}
a{color:var(--brand-dark)}
:focus-visible{outline:3px solid var(--brand);outline-offset:3px;border-radius:6px}
h1,h2,h3{color:var(--ink);line-height:1.2;letter-spacing:-.02em;text-wrap:balance}
.wrap{max-width:1160px;margin:0 auto;padding-left:max(20px,env(safe-area-inset-left,0px));padding-right:max(20px,env(safe-area-inset-right,0px))}
.ico{width:22px;height:22px;flex:none}
/* header */
.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.top .bar{display:flex;align-items:center;gap:16px;min-height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:800;font-size:1.125rem;letter-spacing:-.02em;white-space:nowrap}
.brand svg{width:30px;height:30px}
.brand span{font-weight:600;color:var(--muted);padding-left:10px;border-left:1px solid var(--line)}
.top .search{margin-left:auto;flex:0 1 380px}
.top .site{font-size:.875rem;font-weight:600;text-decoration:none;white-space:nowrap}
@media (max-width:760px){.top .search,.top .site{display:none}}
.banner{background:var(--amber-soft);color:var(--ink);font-size:.875rem}
.banner .wrap{padding-block:9px;display:flex;gap:8px;align-items:center;justify-content:center;text-align:center}
.banner a{font-weight:700}
/* search */
.search{position:relative}
.search input{width:100%;font:inherit;font-size:.9375rem;color:var(--ink);background:#fff;border:1.5px solid var(--line);border-radius:12px;padding:10px 14px 10px 40px;min-height:44px}
.search input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px rgba(19,151,111,.15)}
.search .ico{position:absolute;left:12px;top:50%;transform:translateY(-50%);width:18px;height:18px;color:var(--muted);pointer-events:none}
.results{position:absolute;left:0;right:0;top:calc(100% + 6px);background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);overflow:hidden;z-index:70;max-height:min(70vh,460px);overflow-y:auto;text-align:left}
.results a{display:block;padding:12px 16px;text-decoration:none;border-bottom:1px solid var(--line)}
.results a:last-child{border-bottom:0}
.results a:hover,.results a.active{background:var(--tint)}
.results b{display:block;color:var(--ink);font-weight:700;font-size:.9375rem}
.results small{display:block;color:var(--muted);font-size:.8125rem;line-height:1.45}
.results .cat{color:var(--brand-dark);font-weight:600;font-size:.75rem}
.results .none{padding:14px 16px;color:var(--muted);font-size:.9375rem}
mark{background:var(--amber-soft);color:inherit;border-radius:3px;padding:0 1px}
/* home */
.hero{background:radial-gradient(60% 60% at 15% 0%,#E2F6EC 0%,rgba(226,246,236,0) 70%),radial-gradient(50% 55% at 90% 10%,#E7EEFC 0%,rgba(231,238,252,0) 70%),var(--bg);padding-block:64px 56px;text-align:center}
.hero h1{font-size:clamp(2rem,1.4rem + 2.6vw,3rem);margin:0 0 12px;font-weight:800;letter-spacing:-.03em}
.hero p{margin:0 auto 28px;max-width:560px;font-size:1.0625rem}
.hero .search{max-width:620px;margin:0 auto}
.hero .search input{min-height:56px;font-size:1.0625rem;border-radius:16px;padding-left:48px;box-shadow:var(--shadow)}
.hero .search .ico{left:16px;width:20px;height:20px}
.section{padding-block:56px}
.section h2{font-size:1.5rem;margin:0 0 20px;font-weight:800}
.cats{display:grid;gap:16px;grid-template-columns:repeat(3,minmax(0,1fr))}
@media (max-width:960px){.cats{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:600px){.cats{grid-template-columns:1fr}}
.cat-card{display:grid;gap:8px;align-content:start;padding:22px;border:1px solid var(--line);border-radius:16px;text-decoration:none;color:var(--body);background:#fff;transition:border-color .15s,box-shadow .15s}
.cat-card:hover{border-color:var(--brand);box-shadow:var(--shadow)}
.cat-card .ib{width:44px;height:44px;border-radius:12px;background:var(--mint);color:var(--brand);display:grid;place-items:center}
.cat-card h3{margin:6px 0 0;font-size:1.0625rem;font-weight:700}
.cat-card p{margin:0;font-size:.9375rem}
.cat-card small{color:var(--muted);font-weight:600;font-size:.8125rem}
.popular{display:grid;gap:0 32px;grid-template-columns:repeat(2,minmax(0,1fr));list-style:none;margin:0;padding:0}
@media (max-width:760px){.popular{grid-template-columns:1fr}}
.popular a{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:14px 4px;border-bottom:1px solid var(--line);text-decoration:none;color:var(--ink);font-weight:600}
.popular a:hover{color:var(--brand-dark)}
.popular .ico{width:18px;height:18px;color:var(--muted)}
.contact{background:var(--tint);border-radius:20px;padding:28px;display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between}
.contact h2{margin:0 0 4px;font-size:1.25rem}
.contact p{margin:0}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 20px;border-radius:12px;background:var(--brand);color:#fff;font-weight:700;text-decoration:none;font-size:.9375rem}
.btn:hover{background:var(--brand-dark)}
/* category + article */
.crumbs{font-size:.875rem;color:var(--muted);display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin-bottom:14px}
.crumbs a{color:var(--muted);text-decoration:none;font-weight:600}
.crumbs a:hover{color:var(--brand-dark)}
.page-head{padding-block:40px 8px}
.page-head h1{font-size:clamp(1.75rem,1.3rem + 1.8vw,2.5rem);margin:0 0 10px;font-weight:800;letter-spacing:-.03em}
.page-head .lede{font-size:1.125rem;margin:0;max-width:62ch}
.art-list{list-style:none;margin:24px 0 64px;padding:0;border:1px solid var(--line);border-radius:16px;overflow:hidden}
.art-list a{display:grid;gap:4px;padding:18px 22px;text-decoration:none;border-bottom:1px solid var(--line)}
.art-list li:last-child a{border-bottom:0}
.art-list a:hover{background:var(--tint)}
.art-list b{color:var(--ink);font-size:1.0625rem}
.art-list span{color:var(--body);font-size:.9375rem}
.layout{display:grid;grid-template-columns:250px minmax(0,1fr);gap:56px;padding-block:40px 72px}
@media (max-width:980px){.layout{grid-template-columns:1fr;gap:0;padding-top:28px}.side{display:none}}
.side{position:sticky;top:96px;align-self:start;max-height:calc(100vh - 120px);overflow:auto;font-size:.9375rem}
.side h2{font-size:.875rem;color:var(--muted);margin:0 0 10px;letter-spacing:0;font-weight:700}
.side ul{list-style:none;margin:0 0 24px;padding:0;display:grid;gap:2px}
.side a{display:block;padding:7px 10px;border-radius:8px;text-decoration:none;color:var(--body);line-height:1.35}
.side a:hover{background:var(--tint);color:var(--ink)}
.side a[aria-current="page"]{background:var(--mint);color:var(--brand-dark);font-weight:700}
.side .all{font-weight:600}
article{max-width:74ch;min-width:0}
article h1{font-size:clamp(1.75rem,1.3rem + 1.8vw,2.5rem);margin:0 0 12px;font-weight:800;letter-spacing:-.03em}
article .lede{font-size:1.125rem;color:var(--body);margin:0 0 8px}
article .meta{font-size:.8125rem;color:var(--muted);margin:0 0 28px}
.toc{border:1px solid var(--line);border-radius:14px;padding:16px 20px;margin:0 0 32px;background:var(--tint)}
.toc b{display:block;color:var(--ink);font-size:.875rem;margin-bottom:6px}
.toc ol{margin:0;padding-left:20px;font-size:.9375rem}
.toc li{margin:3px 0}
.toc a{text-decoration:none}
.prose h2{font-size:1.4rem;margin:40px 0 12px;font-weight:800}
.prose h3{font-size:1.125rem;margin:28px 0 8px;font-weight:700}
.prose p,.prose ul,.prose ol{margin:0 0 16px}
.prose li{margin:4px 0}
.prose li>p{margin:0 0 6px}
.prose strong{color:var(--ink)}
.prose code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.875em;background:#F1F4F6;border-radius:5px;padding:1px 5px;color:var(--ink);overflow-wrap:anywhere}
.prose pre{background:#0F1D2B;color:#E6EDF3;border-radius:12px;padding:16px 18px;overflow-x:auto;margin:0 0 18px;font-size:.875rem;line-height:1.55}
.prose pre code{background:none;color:inherit;padding:0;font-size:inherit;overflow-wrap:normal}
.table-wrap{overflow-x:auto;margin:0 0 18px;border:1px solid var(--line);border-radius:12px}
.prose table{border-collapse:collapse;width:100%;font-size:.9375rem}
.prose th,.prose td{text-align:left;padding:10px 14px;border-bottom:1px solid var(--line);vertical-align:top}
.prose th{background:var(--tint);color:var(--ink);font-weight:700;white-space:nowrap}
.prose tr:last-child td{border-bottom:0}
.callout{border-radius:12px;padding:14px 18px;margin:0 0 18px;border-left:4px solid var(--brand);background:var(--mint)}
.callout p{margin:0 0 8px}.callout p:last-child{margin:0}
.callout strong:first-child{display:block;margin-bottom:2px}
.callout.tip{border-color:#2F6FDB;background:var(--sky)}
.callout.important{border-color:var(--red);background:var(--red-soft)}
.callout.launch,.callout.example{border-color:var(--amber);background:var(--amber-soft)}
.next{display:grid;gap:12px;grid-template-columns:1fr 1fr;margin:44px 0 0}
@media (max-width:600px){.next{grid-template-columns:1fr}}
.next a{display:grid;gap:2px;padding:16px 18px;border:1px solid var(--line);border-radius:14px;text-decoration:none}
.next a:hover{border-color:var(--brand)}
.next small{color:var(--muted);font-weight:600;font-size:.8125rem}
.next b{color:var(--ink)}
.next .n{text-align:right}
.related{margin-top:40px;padding-top:28px;border-top:1px solid var(--line)}
.related h2{font-size:1.125rem;margin:0 0 10px}
.related ul{margin:0;padding-left:20px}
.help-more{margin-top:40px;background:var(--tint);border-radius:16px;padding:20px 22px;font-size:.9375rem}
.help-more b{color:var(--ink)}
.mobile-search{display:none;padding-top:18px}
@media (max-width:760px){.mobile-search{display:block}}
footer{border-top:1px solid var(--line);padding-block:28px;color:var(--muted);font-size:.875rem}
footer .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px}
footer a{color:var(--muted);text-decoration:none;font-weight:600}
footer nav{display:flex;flex-wrap:wrap;gap:8px 20px}