*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;line-height:1.55;font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;color:#1a1d24;background:#f6f8fb}
body{margin:0;padding:0;padding-bottom:80px}
img{max-width:100%;height:auto;display:block}
a{color:#0b66e4;text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{line-height:1.25;color:#0f172a;margin:1.4em 0 .6em;font-weight:700}
h1{font-size:1.9rem;margin-top:.4em}
h2{font-size:1.45rem;border-bottom:2px solid #e5ebf3;padding-bottom:.3em}
h3{font-size:1.15rem}
p,ul,ol,table{margin:.8em 0}
ul,ol{padding-left:1.4em}
li{margin:.25em 0}
table{width:100%;border-collapse:collapse;font-size:.95em;background:#fff;border-radius:6px;overflow:hidden;box-shadow:0 1px 0 rgba(0,0,0,.04)}
th,td{padding:.55em .75em;border-bottom:1px solid #e9eef5;text-align:left;vertical-align:top}
th{background:#eef3fb;font-weight:600}
.container{max-width:1180px;margin:0 auto;padding:0 16px}

.site-header{background:#fff;border-bottom:1px solid #e5ebf3;position:sticky;top:0;z-index:50}
.header-inner{display:flex;align-items:center;gap:16px;flex-wrap:wrap;padding:10px 16px}
.logo{display:flex;align-items:center;gap:8px;font-weight:800;font-size:1.15rem;color:#0f172a}
.logo:hover{text-decoration:none}
.logo-mark{display:inline-flex;width:32px;height:32px;align-items:center;justify-content:center;background:#0b66e4;color:#fff;border-radius:8px;font-size:1.1rem}
.search-form{flex:1;display:flex;min-width:240px}
.search-form input{flex:1;padding:9px 12px;border:1px solid #d2dbe8;border-right:0;border-radius:8px 0 0 8px;font-size:.97rem;outline:none;background:#f8fafc}
.search-form input:focus{background:#fff;border-color:#0b66e4}
.search-form button{padding:9px 16px;background:#0b66e4;color:#fff;border:1px solid #0b66e4;border-radius:0 8px 8px 0;cursor:pointer;font-weight:600}
.main-nav{display:flex;gap:14px;flex-wrap:wrap}
.main-nav a{color:#3a4555;font-weight:500;padding:6px 4px}
.main-nav a.active{color:#0b66e4}

.cat-nav{background:#f1f5fa;border-bottom:1px solid #e5ebf3;overflow-x:auto;-webkit-overflow-scrolling:touch}
.cat-nav-inner{display:flex;gap:6px;padding:8px 16px;white-space:nowrap}
.cat-nav a{display:inline-block;padding:6px 12px;border-radius:14px;background:#fff;color:#3a4555;font-size:.92rem;border:1px solid #e0e7ef}
.cat-nav a:hover{text-decoration:none;border-color:#0b66e4;color:#0b66e4}
.cat-nav a.active{background:#0b66e4;color:#fff;border-color:#0b66e4}

main.container{padding-top:18px;padding-bottom:30px}

.breadcrumbs{font-size:.9rem;color:#64748b;margin:8px 0 14px}
.breadcrumbs a{color:#64748b}
.breadcrumbs a:hover{color:#0b66e4}

.hero{background:#fff;border-radius:14px;padding:28px 24px;border:1px solid #e5ebf3;margin-bottom:24px}
.hero h1{margin-top:0;font-size:2rem}
.hero-lede{color:#475569;max-width:780px;font-size:1.05rem}
.hero-stats{display:flex;flex-wrap:wrap;gap:18px;margin-top:14px;color:#475569}
.hero-stats b{color:#0b66e4;font-size:1.2rem}

.cat-grid{margin:24px 0}
.cat-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px}
.cat-card{display:block;background:#fff;border:1px solid #e5ebf3;border-radius:12px;padding:18px;color:inherit;transition:transform .15s,border-color .15s,box-shadow .15s}
.cat-card:hover{text-decoration:none;border-color:#0b66e4;box-shadow:0 6px 18px rgba(11,102,228,.08);transform:translateY(-2px)}
.cat-card-icon{font-size:1.7rem;margin-bottom:6px}
.cat-card h3{margin:6px 0;color:#0f172a}
.cat-card p{color:#64748b;font-size:.92rem;margin:0}

.article-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px}
.article-card{background:#fff;border:1px solid #e5ebf3;border-radius:12px;padding:18px}
.article-card h2,.article-card h3{margin:0 0 8px;font-size:1.1rem;border:none;padding:0}
.article-card h2 a,.article-card h3 a{color:#0f172a}
.article-card p{margin:0;color:#64748b;font-size:.93rem}
.art-cat{display:inline-block;font-size:.78rem;text-transform:uppercase;letter-spacing:.05em;color:#0b66e4;margin-bottom:6px}
.art-cat a{color:#0b66e4}
.art-meta{margin-top:10px;font-size:.85rem;color:#94a3b8}

.popular-list,.about-block{margin-top:32px}
.about-block{background:#fff;border:1px solid #e5ebf3;border-radius:14px;padding:22px}

.cat-header{background:#fff;border:1px solid #e5ebf3;border-radius:12px;padding:18px 22px;margin-bottom:16px}
.cat-header h1{margin-top:0}
.cat-header p{color:#475569;margin-bottom:0}

.layout-2col{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:22px;align-items:start}
.content-col{min-width:0}
.sidebar{position:sticky;top:90px;display:flex;flex-direction:column;gap:14px}
.side-block{background:#fff;border:1px solid #e5ebf3;border-radius:12px;padding:14px 16px}
.side-block h3{margin:0 0 8px;font-size:1rem;border:none;padding:0}
.side-list{list-style:none;padding:0;margin:0}
.side-list li{margin:6px 0;font-size:.93rem;line-height:1.4}
.side-list a{color:#1f2937}
.side-list a:hover{color:#0b66e4}

.article-body{background:#fff;border:1px solid #e5ebf3;border-radius:14px;padding:24px 28px}
.article-header h1{margin-top:0;font-size:1.85rem}
.article-meta{display:flex;flex-wrap:wrap;gap:14px;color:#64748b;font-size:.88rem;margin:0 0 14px}
.article-lede{font-size:1.05rem;color:#334155;background:#f3f7fc;padding:12px 14px;border-left:3px solid #0b66e4;border-radius:0 8px 8px 0}
.article-content h2{margin-top:1.8em}
.article-content h3{margin-top:1.4em}
.article-content blockquote{margin:1em 0;padding:10px 14px;background:#fff7ed;border-left:3px solid #f59e0b;border-radius:0 8px 8px 0;color:#7c2d12}
.article-content .note{background:#ecfeff;border-left:3px solid #06b6d4;border-radius:0 8px 8px 0;padding:10px 14px;color:#155e75}
.article-content code{background:#f1f5fa;padding:1px 5px;border-radius:4px;font-size:.92em}
.article-tags{margin:18px 0 8px;display:flex;flex-wrap:wrap;gap:6px}
.tag{display:inline-block;background:#eef3fb;color:#0b66e4;padding:3px 9px;border-radius:11px;font-size:.85rem}
.tag:hover{text-decoration:none;background:#dbe7f7}

.related-block,.also-read{margin-top:30px;background:#f3f7fc;border-radius:12px;padding:18px}
.related-block h2,.also-read h2{margin-top:0;border:none;padding:0;font-size:1.2rem}
.also-read ul{list-style:none;padding:0;margin:0}
.also-read li{margin:6px 0}

.search-form-big{display:flex;margin:16px 0 22px}
.search-form-big input{flex:1;padding:12px 14px;border:1px solid #d2dbe8;border-right:0;border-radius:8px 0 0 8px;font-size:1rem}
.search-form-big button{padding:12px 22px;background:#0b66e4;color:#fff;border:1px solid #0b66e4;border-radius:0 8px 8px 0;cursor:pointer;font-weight:600}

.sitemap-section{background:#fff;border:1px solid #e5ebf3;border-radius:12px;padding:16px 20px;margin:14px 0}
.sitemap-section h2{margin-top:0}
.sitemap-section ul{columns:2;-webkit-columns:2;-moz-columns:2;list-style:none;padding:0}
.sitemap-section li{break-inside:avoid;margin:5px 0}

.site-footer{background:#0f172a;color:#cbd5e1;margin-top:40px;padding:30px 0 80px}
.footer-inner{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:24px}
.footer-col h3{color:#fff;margin:0 0 10px;font-size:1rem;border:none;padding:0}
.footer-col ul{list-style:none;padding:0;margin:0}
.footer-col li{margin:5px 0}
.footer-col a{color:#cbd5e1}
.footer-col a:hover{color:#fff}
.footer-bottom{border-top:1px solid #1e293b;margin-top:18px;padding-top:14px;font-size:.85rem;color:#94a3b8}

.rsya-slot{margin:18px 0;min-height:90px;display:flex;align-items:center;justify-content:center;background:#f1f5fa;border:1px dashed #d2dbe8;border-radius:8px;overflow:hidden}
.rsya-slot--top{margin:14px auto}
.rsya-slot--inarticle_2,.rsya-slot--inarticle_5{margin:22px 0}
.rsya-slot--sidebar{min-height:250px}
.rsya-floor{position:fixed;left:0;right:0;bottom:0;z-index:80;background:#fff;border-top:1px solid #e5ebf3;padding:6px 8px;display:none;min-height:60px;align-items:center;justify-content:center;box-shadow:0 -2px 10px rgba(0,0,0,.08)}
.rsya-floor-close{position:absolute;right:6px;top:2px;background:transparent;border:0;font-size:18px;color:#64748b;cursor:pointer;line-height:1;padding:4px 7px}

@media (max-width:900px){
  .layout-2col{grid-template-columns:1fr}
  .sidebar{position:static}
  .rsya-floor{display:flex}
  body{padding-bottom:120px}
}
@media (max-width:520px){
  .hero{padding:20px 16px}
  .hero h1{font-size:1.6rem}
  .article-body{padding:18px 16px}
  .sitemap-section ul{columns:1}
  h1{font-size:1.5rem}
  h2{font-size:1.25rem}
}