:root{--bg:#f4f5f7;--card:#fff;--bd:#e3e5ea;--tx:#1f2328;--mut:#6b7280;--acc:#2f6fed;--acc-d:#2456bd}
*{box-sizing:border-box}
body{margin:0;background:var(--card);color:var(--tx);font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Arial,sans-serif;line-height:1.7}
a{color:var(--acc);text-decoration:none}a:hover{text-decoration:underline}
header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--bd)}
.hd{display:flex;align-items:center;gap:20px;height:60px;max-width:1080px;margin:0 auto;padding:0 20px}
.brand{font-weight:800;font-size:19px;color:var(--tx)}.brand span{color:var(--acc)}
.hd nav{margin-left:auto;display:flex;gap:20px;align-items:center}
.hd nav a{color:var(--tx);font-size:14.5px;font-weight:500}.hd nav a:hover{color:var(--acc);text-decoration:none}
.btn{display:inline-block;border-radius:10px;padding:9px 16px;font-size:14px;font-weight:600;background:var(--acc);color:#fff;border:0;cursor:pointer}
.btn:hover{background:var(--acc-d);text-decoration:none;color:#fff}
.wrap{max-width:760px;margin:0 auto;padding:0 20px}
.wrap.wide{max-width:1040px}
main{padding:26px 0 56px}
.crumbs{font-size:13px;color:var(--mut);margin:0 0 18px}
.crumbs a{color:var(--mut)}.crumbs a:hover{color:var(--acc)}
h1{font-size:32px;line-height:1.25;margin:0 0 12px;letter-spacing:-.015em}
.meta{color:var(--mut);font-size:14px;margin:0 0 22px}
.lead{font-size:19px;color:#33404f;margin:0 0 18px}
article p{font-size:17px;margin:0 0 16px}
article h2{font-size:23px;margin:34px 0 12px;letter-spacing:-.01em}
article h3{font-size:19px;margin:24px 0 8px}
article ul,article ol{padding-left:22px;margin:0 0 16px}
article li{font-size:17px;margin:6px 0}
article img{max-width:100%;height:auto;border-radius:12px;border:1px solid var(--bd);display:block;margin:18px 0}
figure{margin:22px 0}
figure img{margin:0}
figcaption{font-size:14px;color:var(--mut);text-align:center;margin-top:9px;line-height:1.45}
blockquote{margin:18px 0;padding:12px 18px;border-left:3px solid var(--acc);background:var(--bg);border-radius:0 10px 10px 0;color:#33404f}
.tpl{background:var(--bg);border:1px solid var(--bd);border-radius:12px;padding:14px 18px;margin:14px 0;font-size:16px;line-height:1.6}
.tpl .lbl{font-size:12px;text-transform:uppercase;letter-spacing:.04em;color:var(--mut);margin:0 0 6px}
code{background:var(--bg);border:1px solid var(--bd);border-radius:6px;padding:1px 6px;font-size:.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;word-break:break-word}
.toc{background:var(--bg);border:1px solid var(--bd);border-radius:12px;padding:14px 20px;margin:0 0 26px}
.toc-t{font-size:13px;text-transform:uppercase;letter-spacing:.04em;color:var(--mut);margin:0 0 8px}
.toc ol{margin:0;padding-left:20px}.toc li{margin:4px 0;font-size:15px}
.cta{background:linear-gradient(135deg,#eef3fe,#f7faff);border:1px solid #d7e4ff;border-radius:16px;padding:24px 26px;margin:32px 0}
.cta h3{margin:0 0 8px;font-size:20px}
.cta p{margin:0 0 14px;font-size:16px;color:#33404f}
.faq{margin-top:34px}
.faq h2{margin-bottom:6px}
.qa{border-top:1px solid var(--bd);padding:16px 0}
.qa .q{font-weight:700;font-size:17px;margin:0 0 6px}
.qa .a{font-size:16px;color:#33404f;margin:0}
.related{margin-top:34px;border-top:1px solid var(--bd);padding-top:22px}
.related h2{font-size:18px;margin:0 0 12px}
.related a{display:block;padding:6px 0;font-size:16px}
footer{background:#12151b;color:#aeb4bd;padding:32px 0;font-size:14px;margin-top:40px}
footer a{color:#dbe0e7}
.foot-links{display:flex;gap:20px;flex-wrap:wrap;margin-bottom:14px}
.foot .cr{color:#7d858f;font-size:13px;border-top:1px solid #262b34;padding-top:16px}
.blog-hero{padding:30px 0 6px}
.blog-hero h1{font-size:34px;margin:0 0 8px}
.blog-hero p{color:var(--mut);font-size:17px;margin:0;max-width:640px}
.cluster{margin-top:36px}
.cluster>h2{font-size:20px;margin:0 0 4px}
.cluster>.cs{font-size:14px;color:var(--mut);margin:0 0 14px}
.posts{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.post{display:block;background:var(--card);border:1px solid var(--bd);border-radius:14px;padding:18px 20px;transition:border-color .15s,box-shadow .15s}
.post:hover{border-color:var(--acc);text-decoration:none;box-shadow:0 8px 24px rgba(23,49,92,.08)}
.post .pt{font-size:17px;font-weight:700;color:var(--tx);margin:0 0 6px;line-height:1.35}
.post .pd{font-size:14px;color:var(--mut);margin:0;line-height:1.5}
.tag{display:inline-block;font-size:12px;color:var(--acc);background:#eef2fb;border-radius:20px;padding:2px 10px;margin-bottom:10px}
@media(max-width:700px){.hd nav a:not(.btn){display:none}.posts{grid-template-columns:1fr}h1{font-size:27px}.blog-hero h1{font-size:28px}article h2{font-size:21px}}