:root{
  --ink:#16222e;--ink-soft:#44566a;--paper:#ffffff;--bg:#f5f7fa;
  --brand:#0ea06e;--brand-dark:#0b7f58;--brand-ink:#063d2c;
  --accent:#f5a623;--soft:#e8f6f0;--line:#e2e8f0;
  --h:#0a0f14;--shadow:0 10px 30px rgba(16,42,67,.08);
  --radius:14px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font:17px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased}
a{color:var(--brand-dark)}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-9999px;top:0;background:#0a0f14;color:#fff;padding:10px 16px;z-index:99}
.skip:focus{left:12px}

/* header */
.site-header{background:#0d1b2a;color:#e8f6f0;position:sticky;top:0;z-index:50;box-shadow:0 2px 14px rgba(0,0,0,.18)}
.mast{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:66px;flex-wrap:wrap;padding:8px 0}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:#fff}
.brand-mark{width:40px;height:40px;border-radius:11px;background:linear-gradient(135deg,#10b981,#0e7490);display:grid;place-items:center}
.brand-name{display:flex;flex-direction:column;line-height:1.15}
.brand-name b{font-size:19px;letter-spacing:.2px}
.brand-name small{font-weight:400;color:#9db7c8;font-size:11.5px;letter-spacing:.4px}
.main-nav a{color:#d7e6ee;text-decoration:none;font-size:15px;font-weight:600;padding:6px 4px;margin:0 12px}
.main-nav a:hover{color:#8ee6bf}
.nav-toggle{display:none}

/* hero */
.hero{background:linear-gradient(135deg,#0b1f33 0%,#0e3a4a 58%,#116b4e 100%);color:#fff;padding:56px 0 60px;position:relative;overflow:hidden}
.hero-in{position:relative;z-index:2;max-width:760px}
.kicker{display:inline-block;color:#ffd479;font-weight:700;letter-spacing:.6px;text-transform:uppercase;font-size:12.5px;margin-bottom:12px;background:rgba(255,255,255,.08);padding:6px 12px;border-radius:30px;border:1px solid rgba(255,255,255,.18)}
.hero h1{font-size:clamp(26px,4.4vw,46px);line-height:1.12;margin:6px 0 16px;color:#fff}
.hero p{font-size:clamp(16px,2vw,19px);color:#d9ecf2;max-width:640px;margin:0}
.hero-meta{display:flex;gap:22px;flex-wrap:wrap;margin-top:22px;color:#cfe5de;font-size:14px}
.hero-meta span b{color:#fff}

/* layout */
.layout{display:grid;grid-template-columns:1fr 300px;gap:40px;padding:40px 0 70px}
@media(max-width:920px){.layout{grid-template-columns:1fr}.rail{display:none}}
.lead-in{font-size:1.16em;color:var(--ink-soft);border-left:4px solid var(--brand);padding-left:18px;margin:0 0 26px}
section.block{margin-bottom:14px}
h1,h2,h3{color:var(--h);line-height:1.25}
h2.toc{color:var(--ink);letter-spacing:-.2px}
.art{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;box-shadow:var(--shadow);transition:transform .18s ease,box-shadow .18s ease}
.art:hover{transform:translateY(-3px);box-shadow:0 18px 40px rgba(16,42,67,.14)}
.art figcaption{aspect-ratio:1200/630;overflow:hidden;background:linear-gradient(135deg,#05342b,#0e7490);display:flex}
.art figcaption svg{width:100%;height:100%}
.art-body{padding:24px 26px;display:flex;flex-direction:column;flex:1}
.art-body .cat,.cat-pill{font-size:12.5px;font-weight:700;letter-spacing:.4px;text-transform:uppercase;color:var(--brand-dark);background:var(--soft);display:inline-block;padding:5px 11px;border-radius:20px;align-self:flex-start}
.art h2.art-t{font-size:22px;margin:14px 0 8px;line-height:1.3}
.art h2.art-t a{color:var(--h);text-decoration:none}
.art h2.art-t a:hover{color:var(--brand-dark)}
.art p.dek{color:var(--ink-soft);margin:0 0 18px;font-size:15.5px}
.byline{display:flex;align-items:center;gap:11px;margin-top:auto;border-top:1px solid var(--line);padding-top:15px}
.avatar{width:38px;height:38px;border-radius:50%;flex:0 0 auto;display:grid;place-items:center;color:#fff;font-weight:700;font-size:15px}
.byline .who{display:flex;flex-direction:column;line-height:1.35}
.byline .who a{color:var(--ink);font-weight:700;text-decoration:none;font-size:14.5px}
.byline .who span{color:#8596a8;font-size:13px}

/* grid */
.grid{display:grid;gap:26px}
.g2{grid-template-columns:repeat(auto-fit,minmax(310px,1fr))}
.g3{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.feat .art{flex-direction:row}
@media(max-width:760px){.feat .art{flex-direction:column}.feat .art figcaption{aspect-ratio:1200/500}}

/* sections */
.pad-sec{padding:56px 0}
.inverse{background:#0f2536;color:#dbe9f1}
.inverse h2,.inverse h3{color:#fff}
.muted{color:var(--ink-soft)}
.section-h{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px;border-bottom:2px solid var(--soft);padding-bottom:10px}
.section-h h2{font-size:22px;margin:0}
.chips{display:flex;flex-wrap:wrap;gap:10px}
a.chip{background:#fff;border:1px solid var(--line);border-radius:30px;padding:9px 16px;text-decoration:none;color:var(--ink);font-weight:600;font-size:14.5px}
a.chip:hover{border-color:var(--brand);color:var(--brand-dark);background:var(--soft)}
.cat-grid{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.numb{font:700 clamp(40px,6vw,80px)/1 Georgia,serif;background:linear-gradient(160deg,#10b981,#0e7490);-webkit-background-clip:text;background-clip:text;color:transparent}

/* article page */
.article-top{background:#fff;border-bottom:1px solid var(--line)}
.breadcrumb{font-size:13.5px;color:#7a8a9c;padding:18px 0 0}
.breadcrumb a{color:#7a8a9c;text-decoration:none}
.breadcrumb a:hover{color:var(--brand-dark)}
.article-head{padding:22px 0 30px}
.article-head h1{font-size:clamp(26px,4.4vw,44px);line-height:1.15;margin:16px 0 14px}
.article-head .lead{font-size:1.12em;color:var(--ink-soft)}
.art-meta{display:flex;flex-wrap:wrap;gap:22px;align-items:center;color:#68788b;font-size:14px;margin-top:18px}
.art-hero{aspect-ratio:1200/500;display:block;width:100%}
.article-body{font-size:18px;color:#24313e;line-height:1.85;max-width:760px}
.article-body h2{margin:34px 0 14px;font-size:25px}
.article-body h3{margin:26px 0 12px;font-size:20px}
.article-body p{margin:0 0 18px}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:22px}
.article-body li{margin-bottom:10px}
.article-body blockquote{margin:24px 0;padding:18px 22px;border-left:4px solid var(--brand);background:var(--soft);border-radius:0 12px 12px 0;font-style:normal;color:#254039}
.callout{background:#fff8ec;border:1px solid #f4d9a8;border-left:5px solid var(--accent);border-radius:10px;padding:16px 20px;margin:24px 0;color:#5b4520}
.tag-list{display:flex;flex-wrap:wrap;gap:8px;margin-top:6px}
.tag-list a{font-size:13px;color:var(--ink-soft);background:#f0f4f8;padding:5px 12px;border-radius:16px;text-decoration:none;border:1px solid var(--line)}
.tag-list a:hover{color:var(--brand-dark);border-color:var(--brand)}
.author-card{display:flex;gap:18px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin-top:34px;box-shadow:var(--shadow)}
.author-card .avatar{width:64px;height:64px;font-size:24px}
.author-card h3{margin:0 0 6px;font-size:19px}
.author-card h3 a{color:var(--h);text-decoration:none}
.author-card p{margin:0;color:var(--ink-soft);font-size:15px}
.related{background:#fff;padding:52px 0;border-top:1px solid var(--line)}

/* footer */
.site-footer{background:#0a1420;color:#aebfca;font-size:15px}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:36px;padding:52px 0 30px}
@media(max-width:860px){.foot-grid{grid-template-columns:1fr 1fr;gap:26px}}
@media(max-width:520px){.foot-grid{grid-template-columns:1fr}}
.site-footer h4{color:#dcebf1;margin:0 0 14px;font-size:15px;letter-spacing:.5px;text-transform:uppercase}
.site-footer ul{list-style:none;margin:0;padding:0}
.site-footer li{margin-bottom:9px}
.site-footer a{color:#aebfca;text-decoration:none}
.site-footer a:hover{color:#8ee6bf}
.foot-brand{color:#eaf4ee}
.foot-base{border-top:1px solid #1d3448;padding:20px 0;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:13.5px}

/* legal */
.legal{max-width:780px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:44px 48px;margin:44px auto 70px;box-shadow:var(--shadow)}
@media(max-width:640px){.legal{padding:28px 24px}}
.legal h1{font-size:30px}
.legal h2{font-size:21px;margin-top:34px}
.legal ul{padding-left:22px}
.legal .updated{color:#8596a8;font-size:14px}

/* reveal */
[data-reveal]{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}
[data-reveal].in{opacity:1;transform:none}
.btn{display:inline-block;background:var(--brand);color:#fff!important;font-weight:700;padding:12px 22px;border-radius:30px;text-decoration:none;font-size:15.5px}
.btn:hover{background:var(--brand-dark)}