:root { --ink: #0D1117; --muted: #6B7280; --line: #E5E7EB; --soft: #F8FAFC; --blue: #2563EB; --blue-soft: #EFF6FF; }
* { box-sizing: border-box; }
body { margin: 0; font: 16px/1.65 Inter, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif; color: var(--ink); background: #fff; }
a { color: var(--blue); }
.h-in { max-width: 1080px; margin: 0 auto; padding: 0 20px; }
.h-top { border-bottom: 1px solid var(--line); background: #fff; position: sticky; top: 0; z-index: 2; }
.h-top .h-in { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.h-brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); font-weight: 600; }
.h-brand img { height: 28px; }
.h-brand span { border-left: 1px solid var(--line); padding-left: 10px; color: var(--muted); }
.h-top nav { display: flex; gap: 16px; align-items: center; font-size: 14px; }
.h-top nav a { text-decoration: none; color: #374151; }
.h-btn { background: var(--blue); color: #fff !important; padding: 7px 16px; border-radius: 100px; font-weight: 600; }
.h-main { padding-top: 8px; padding-bottom: 60px; }
.h-hero { text-align: center; padding: 48px 0 28px; }
.h-hero h1 { font-size: 36px; margin: 0 0 6px; }
.h-hero p { color: var(--muted); margin: 0 0 20px; }
.h-search { width: 100%; max-width: 620px; padding: 14px 18px; font-size: 16px; border: 1px solid #D1D5DB; border-radius: 100px; font-family: inherit; }
.h-search:focus { outline: 0; border-color: var(--blue); box-shadow: 0 0 0 3px var(--blue-soft); }
.h-group h2 { font-size: 18px; margin: 28px 0 12px; }
.h-cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
@media (max-width: 860px) { .h-cards { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .h-cards { grid-template-columns: 1fr; } .h-hero h1 { font-size: 28px; } }
.h-card { display: flex; flex-direction: column; gap: 4px; padding: 18px; border: 1px solid var(--line); border-radius: 14px; text-decoration: none; color: var(--ink); transition: border-color .15s, box-shadow .15s; }
.h-card:hover { border-color: #93C5FD; box-shadow: 0 6px 18px rgba(37,99,235,.08); }
.h-card span { color: var(--muted); font-size: 14px; line-height: 1.5; }
.h-none { text-align: center; color: var(--muted); }
.h-crumb { font-size: 14px; color: var(--muted); margin: 24px 0 8px; }
.h-crumb a { text-decoration: none; }
.h-article-wrap { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 40px; }
@media (max-width: 860px) { .h-article-wrap { grid-template-columns: 1fr; } }
.h-article h1 { font-size: 32px; line-height: 1.25; margin: 0 0 8px; }
.h-lead { font-size: 18px; color: var(--muted); margin: 0 0 24px; }
.h-article h2 { font-size: 21px; margin: 32px 0 8px; }
.h-article li { margin: 4px 0; }
.h-article code { background: var(--soft); padding: 1px 6px; border-radius: 6px; font-size: 14px; }
.h-side h3 { font-size: 13px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); }
.h-side ul { list-style: none; padding: 0; margin: 0 0 24px; }
.h-side li { padding: 6px 0; border-bottom: 1px solid var(--line); font-size: 15px; }
.h-side li a { text-decoration: none; }
.h-contact { background: var(--blue-soft); border-radius: 14px; padding: 16px; display: grid; gap: 4px; font-size: 14px; }
.h-foot { border-top: 1px solid var(--line); padding: 20px 0; color: var(--muted); font-size: 13px; }
.h-card[hidden], .h-group[hidden] { display: none; }