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(max-width:640px){.tool-card{padding:18px}.textarea{min-height:200px}.preview-box{flex-direction:column;align-items:flex-start}.cat-head{flex-direction:column;align-items:flex-start;gap:4px}}.article{max-width:800px;margin:0 auto;padding:34px 0 12px}.article h1{margin-bottom:10px;font-size:clamp(22px,3.4vw,32px);font-weight:800;line-height:1.25}.article-meta{color:var(--muted);margin-bottom:22px;font-size:13px}.article-meta span{border-right:1px solid var(--line);margin-right:10px;padding-right:10px}.prose{font-size:16px;line-height:1.75}.prose p{margin:0 0 16px}.prose h2{margin:34px 0 12px;scroll-margin-top:80px;font-size:22px;font-weight:800}.prose h3{margin:26px 0 10px;font-size:18px;font-weight:800}.prose ul,.prose ol{margin:0 0 16px 22px}.prose li{margin-bottom:6px}.prose b{color:var(--text)}.prose code{border:1px solid var(--line);color:#3730a3;background:#eef1fa;border-radius:6px;padding:2px 6px;font-family:Consolas,Menlo,monospace;font-size:14px}.prose pre{color:#e2e8f0;background:#0f172a;border-radius:10px;margin:0 0 18px;padding:16px 18px;font-size:13px;line-height:1.6;overflow-x:auto}.prose pre code{color:inherit;background:0 0;border:0;padding:0;font-size:13px}.prose table{border-collapse:collapse;width:100%;margin:0 0 18px;font-size:14px}.prose table th{background:var(--brand-soft);color:var(--text);text-align:left}.prose table th,.prose table td{border:1px solid var(--line);padding:9px 11px}.prose .tip{border:1px solid #bbf7d0;border-left:4px solid var(--green);background:#f0fdf4;border-radius:8px;margin:0 0 18px;padding:13px 16px;font-size:15px}.prose .warn{border:1px solid #fde68a;border-left:4px solid var(--amber);background:#fffbeb;border-radius:8px;margin:0 0 18px;padding:13px 16px;font-size:15px}.promo{background:linear-gradient(135deg,var(--brand),#7c3aed);color:#fff;border-radius:12px;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;margin:26px 0;padding:22px 24px;display:flex}.promo b{margin-bottom:4px;font-size:17px;display:block}.promo p{opacity:.92;margin:0;font-size:14px}.promo a{color:var(--brand);white-space:nowrap;background:#fff;border-radius:9px;padding:11px 20px;font-size:14px;font-weight:700}.guides-grid{grid-template-columns:repeat(auto-fill,minmax(235px,1fr));gap:14px;margin-top:20px;display:grid}.guide-card{border:1px solid var(--line);color:var(--text);background:#fff;border-radius:12px;flex-direction:column;gap:7px;padding:15px;transition:all .15s;display:flex}.guide-card:hover{box-shadow:var(--shadow);border-color:#c7cbe0;transform:translateY(-3px)}.guide-card .badge{align-self:flex-start}.guide-card b{font-size:14px;line-height:1.35}.guide-card span{color:var(--muted);font-size:12.5px}.guide-card span.author{color:var(--brand);font-size:12px;font-weight:700}