*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--ink);line-height:1.65;font-size:17px;-webkit-font-smoothing:antialiased}
:root{--bg:#f5f7fb;--ink:#0f172a;--muted:#586173;--line:#e6eaf0;--card:#fff;--accent:#e0850a;--accent-d:#a16007;--tint:#fcf3e6;--radius:16px;--wrap:1080px;--prose:730px;--shadow:0 1px 2px rgba(15,23,42,.04),0 6px 20px rgba(15,23,42,.05)}
a{color:var(--accent-d);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto;display:block}
.wrap,.container{max-width:var(--wrap);margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px}.skip:focus{left:8px;top:8px;background:#fff;padding:8px;border-radius:8px;z-index:100}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);backdrop-filter:saturate(180%) blur(10px);-webkit-backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-top:13px;padding-bottom:13px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.14rem;color:var(--ink)}
.brand:hover{text-decoration:none}
.brand .mark{width:30px;height:30px;border-radius:9px;background:var(--accent);display:inline-grid;place-items:center;color:#fff;font-weight:900;flex:0 0 auto;box-shadow:var(--shadow);font-size:.9rem}
.brand b{color:var(--accent-d)}
.brand-logo{height:34px;width:auto}
.main-nav{display:flex;gap:4px;align-items:center;flex-wrap:wrap}
.main-nav a{padding:8px 13px;border-radius:999px;color:var(--muted);font-weight:600;font-size:.92rem}
.main-nav a:hover{background:var(--tint);color:var(--accent-d);text-decoration:none}
.main-nav a[aria-current=page]{background:var(--accent);color:#fff}
.nav-toggle{display:none}.nav-burger{display:none}
@media(max-width:880px){
 .nav-burger{display:inline-flex;flex-direction:column;gap:5px;width:44px;height:40px;justify-content:center;align-items:center;border-radius:10px;border:1px solid var(--line);cursor:pointer;background:#fff}
 .nav-burger span{width:20px;height:2px;background:var(--ink);border-radius:2px}
 .header-inner{position:relative}
 .main-nav{position:absolute;top:calc(100% + 13px);left:0;right:0;background:#fff;border-top:1px solid var(--line);flex-direction:column;align-items:stretch;gap:2px;padding:10px 20px 16px;display:none;box-shadow:var(--shadow)}
 .nav-toggle:checked~.main-nav{display:flex}
 .main-nav a{padding:12px 14px}
}
.hero{padding:46px 0 8px}
.hero-grid{display:grid;grid-template-columns:1.35fr .9fr;gap:34px;align-items:start}
@media(max-width:880px){.hero-grid{grid-template-columns:1fr;gap:24px}}
.kicker{display:inline-block;font-size:.72rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--accent-d);background:var(--tint);padding:6px 12px;border-radius:999px;margin-bottom:14px}
h1{font-size:2.55rem;line-height:1.08;letter-spacing:-.02em;margin:.1em 0 .32em;font-weight:850}
@media(max-width:640px){h1{font-size:2.05rem}}
.hero .lead{font-size:1.15rem;color:var(--muted);margin:0}
.mark-t{color:var(--accent-d)}
.tags{list-style:none;display:flex;gap:8px;flex-wrap:wrap;padding:0;margin:18px 0 0}
.tags li{font-size:.8rem;font-weight:600;color:var(--muted);background:#fff;border:1px solid var(--line);padding:5px 12px;border-radius:999px}
.hcard{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}
.hcard h2{font-size:.76rem;letter-spacing:.08em;text-transform:uppercase;color:var(--accent-d);margin:0 0 14px}
.hcard dl{margin:0;display:grid;gap:11px}
.hcard .row{display:flex;justify-content:space-between;gap:12px;border-bottom:1px dashed var(--line);padding-bottom:10px}
.hcard .row:last-child{border-bottom:0;padding-bottom:0}
.hcard dt{color:var(--muted);font-size:.92rem;margin:0}
.hcard dd{margin:0;font-weight:700;font-variant-numeric:tabular-nums;text-align:right}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:28px 0 6px}
@media(max-width:760px){.stats{grid-template-columns:repeat(2,1fr)}}
.stat{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow)}
.stat .v{font-size:1.85rem;font-weight:850;letter-spacing:-.02em;color:var(--accent-d);font-variant-numeric:tabular-nums;line-height:1}
.stat .l{color:var(--muted);font-size:.87rem;margin-top:6px}
main{padding-bottom:20px}
.prose{max-width:var(--prose)}
.prose h2{font-size:1.58rem;letter-spacing:-.01em;margin:1.7em 0 .5em;font-weight:800}
.prose h3{font-size:1.18rem;margin:1.4em 0 .4em;font-weight:750}
.prose p,.prose li{color:#1e2633}
.prose ul,.prose ol{padding-left:1.15em}
.prose li{margin:.3em 0}
.secn{display:inline-block;font-size:.74rem;font-weight:800;color:var(--accent-d);background:var(--tint);padding:4px 10px;border-radius:999px;font-variant-numeric:tabular-nums;margin-bottom:6px}
.crumbs{color:var(--muted);font-size:.85rem;margin:6px 0 16px}
.crumbs a{color:var(--muted)}
.content-figure{margin:26px 0}
.content-img{border-radius:var(--radius);border:1px solid var(--line);width:100%}
.kt{background:var(--tint);border:1px solid var(--line);border-radius:var(--radius);padding:22px 24px;margin:24px 0}
.kt h2{font-size:.82rem;letter-spacing:.06em;text-transform:uppercase;color:var(--accent-d);margin:0 0 14px}
.kt ul{margin:0;padding-left:0;list-style:none;display:grid;gap:11px}
.kt li{position:relative;padding-left:30px;color:#1e2633}
.kt li::before{content:"\2713";position:absolute;left:0;top:2px;width:20px;height:20px;background:var(--accent);color:#fff;border-radius:6px;display:grid;place-items:center;font-size:.7rem;font-weight:900}
.callout{background:var(--card);border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:12px;padding:16px 18px;margin:22px 0;box-shadow:var(--shadow)}
.callout strong{color:var(--accent-d)}
.method{background:var(--card);border:1px dashed var(--line);border-radius:var(--radius);padding:20px 22px;margin:26px 0}
.method h2{font-size:.82rem;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);margin:0 0 10px}
.table-wrap{overflow-x:auto;margin:22px 0}
table{width:100%;border-collapse:collapse;font-size:.95rem;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
th,td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--line)}
th{background:var(--tint);font-size:.8rem;text-transform:uppercase;letter-spacing:.04em;color:var(--accent-d)}
tr:last-child td{border-bottom:0}
.toc{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px 24px;margin:24px 0;box-shadow:var(--shadow);counter-reset:t}
.toc h2{font-size:.82rem;letter-spacing:.06em;text-transform:uppercase;color:var(--accent-d);margin:0 0 12px}
.toc ol{list-style:none;margin:0;padding:0;columns:2;column-gap:30px}
@media(max-width:640px){.toc ol{columns:1}}
.toc li{counter-increment:t;margin:0 0 8px;padding-left:30px;position:relative;break-inside:avoid}
.toc li::before{content:counter(t,decimal-leading-zero);position:absolute;left:0;color:var(--accent-d);font-weight:800;font-variant-numeric:tabular-nums}
.toc a{color:var(--ink)}
.faq{margin:16px 0}
.faq details{background:#fff;border:1px solid var(--line);border-radius:12px;margin:10px 0;padding:0 18px}
.faq summary{cursor:pointer;font-weight:700;padding:16px 26px 16px 0;position:relative;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:2px;top:13px;color:var(--accent-d);font-size:1.3rem;font-weight:800}
.faq details[open]>summary::after{content:"\2212"}
.faq details[open]>summary{border-bottom:1px solid var(--line)}
.faq details>p{padding:14px 0;margin:0;color:#1e2633}
.author-box{display:flex;gap:14px;align-items:flex-start;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px;margin:26px 0;box-shadow:var(--shadow)}
.avatar{width:46px;height:46px;border-radius:50%;background:var(--accent);color:#fff;display:grid;place-items:center;font-weight:800;flex:0 0 auto}
.author-box .n{font-weight:700}.author-box .m{color:var(--muted);font-size:.9rem;margin-top:2px}
.age-badge{display:inline-block;font-weight:800;color:#fff;background:var(--accent);padding:5px 12px;border-radius:999px;font-size:.8rem}
.site-footer{background:#fff;border-top:1px solid var(--line);margin-top:34px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:28px;padding:38px 0}
@media(max-width:760px){.footer-grid{grid-template-columns:1fr;gap:22px}}
.site-footer h4{font-size:.78rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin:0 0 12px}
.site-footer ul{list-style:none;padding:0;margin:0;display:grid;gap:8px}
.site-footer a{color:var(--ink)}
.footer-bottom{border-top:1px solid var(--line);padding:16px 0;color:var(--muted);font-size:.84rem}

.brand .mark-img{width:30px;height:30px;border-radius:9px;display:block;flex:0 0 auto;object-fit:cover}