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span{color:var(--blue)}.nav{display:flex;gap:22px;margin-left:auto;font-size:.93rem;font-weight:700}.nav a{padding:26px 0}.nav a:hover{color:var(--blue)}.menu-btn{display:none;margin-left:auto;border:0;background:var(--pale);padding:10px 12px;border-radius:10px}.hero{height:min(620px,calc(100svh - 109px));min-height:0;display:flex;align-items:flex-start;overflow:hidden;background-image:linear-gradient(90deg,rgba(4,24,43,.92) 0%,rgba(4,24,43,.76) 43%,rgba(4,24,43,.16) 70%),url('../images/site/hero.png');background-size:cover;background-position:center;border-radius:0 0 36px 36px;color:white}.hero .inner{padding:32px 0 22px;max-width:660px}.eyebrow{display:inline-flex;align-items:center;gap:8px;background:rgba(56,160,255,.16);border:1px solid rgba(255,255,255,.22);padding:8px 13px;border-radius:999px;font-weight:800;font-size:.8rem;letter-spacing:.08em;text-transform:uppercase}.hero h1{font-size:clamp(2.35rem,4.4vw,4.25rem);line-height:1.01;letter-spacing:-.055em;margin:12px 0}.hero p{font-size:1.02rem;color:#e5eef8;max-width:600px;margin:0}.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:20px}.btn{display:inline-flex;align-items:center;justify-content:center;background:var(--blue);color:#fff;padding:13px 19px;border-radius:12px;font-weight:800;border:1px solid var(--blue)}.btn.ghost{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.35)}section{padding:78px 0}.section-head{display:flex;justify-content:space-between;gap:24px;align-items:end;margin-bottom:28px}.section-head h2{font-size:clamp(1.8rem,3vw,2.8rem);margin:0;letter-spacing:-.04em}.section-head p{max-width:620px;color:var(--muted);margin:0}.category-grid,.card-grid,.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.category-card,.feature-card,.post-card{border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:0 8px 24px 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h3{font-size:1.25rem;margin:28px 0 8px}.article-main p{color:#27384a;margin:0 0 18px}.article-main ul{padding-left:22px}.article-main li{margin:8px 0}.article-main .context-link{border-left:4px solid var(--blue);background:#eef6ff;padding:16px 18px;border-radius:0 12px 12px 0}.article-main .context-link a{color:var(--blue);font-weight:800}.toc{position:sticky;top:100px;border:1px solid var(--line);border-radius:16px;padding:18px;background:#fff}.toc h3{margin-top:0}.toc a{display:block;padding:7px 0;color:var(--muted);font-size:.9rem}.meta{display:flex;flex-wrap:wrap;gap:12px;color:var(--muted);font-size:.9rem}.notice{border:1px solid #f6d58c;background:#fff8e7;padding:16px 18px;border-radius:14px;margin:24px 0}.prose{max-width:850px}.prose h2{margin-top:34px}.form{display:grid;gap:14px}.form label{font-weight:750}.form input,.form textarea{width:100%;padding:13px 14px;border:1px solid #cfd9e5;border-radius:11px;font:inherit}.form textarea{min-height:160px;resize:vertical}.form button{justify-self:start;cursor:pointer}.breadcrumbs{font-size:.9rem;color:var(--muted);margin-bottom:10px}.breadcrumbs a{color:var(--blue)}@media(max-width:1180px){.post-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}@media(max-width:980px){.nav{display:none}.menu-btn{display:block}.nav.open{position:absolute;display:flex;flex-direction:column;top:74px;left:20px;right:20px;background:white;padding:16px;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow)}.nav.open a{padding:8px 4px}.category-grid,.feature-grid{grid-template-columns:repeat(2,1fr)}.post-grid{grid-template-columns:repeat(2,1fr)}.split{grid-template-columns:1fr}.split img{height:auto;max-height:none;aspect-ratio:4/3}.article-shell{grid-template-columns:1fr}.toc{position:relative;top:auto;order:-1}}@media(max-width:640px){.container{width:min(var(--max),calc(100% - 26px))}.hero{height:calc(100svh - 109px);min-height:0;max-height:560px;background-position:70% center}.hero .inner{padding:26px 0 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