:root{--bg:#f5f7fb;--panel:#fff;--ink:#111827;--muted:#667085;--line:#e5e7eb;--brand:#174ea6;--brand2:#0b2f66;--soft:#eaf2ff;--ok:#12b76a;--warn:#f79009}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif}.wrap{max-width:1180px;margin:0 auto;padding:0 22px}.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}.nav{display:flex;justify-content:space-between;align-items:center;gap:18px;padding-top:15px;padding-bottom:15px}.brand{display:flex;gap:12px;align-items:center;color:var(--ink);text-decoration:none}.brand strong{display:block;font-size:18px;line-height:1.1}.brand em{display:block;font-style:normal;color:var(--muted);font-size:13px}.mark{background:linear-gradient(135deg,var(--brand),#39a0ff);color:#fff;border-radius:14px;padding:10px 9px;font-weight:800;box-shadow:0 8px 20px #174ea630}nav{display:flex;gap:10px;flex-wrap:wrap}nav a,.btn{background:var(--soft);border:1px solid #d7e7ff;color:var(--brand2);padding:9px 13px;border-radius:999px;text-decoration:none;font-weight:650}.hero{padding:58px 0 38px;background:linear-gradient(135deg,#071b3a,#174ea6);color:white}.hero h1{font-size:clamp(34px,5vw,58px);line-height:1.05;margin:0 0 14px}.hero p{font-size:19px;max-width:780px;color:#dbeafe}.searchbox{display:flex;gap:10px;margin-top:24px;max-width:760px}.searchbox input{flex:1;padding:16px 18px;border-radius:16px;border:0;font-size:17px}.searchbox button{padding:16px 20px;border-radius:16px;border:0;background:#fff;color:var(--brand2);font-weight:800;cursor:pointer}.quicklinks{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}.quicklinks a{color:white;border:1px solid #ffffff55;border-radius:999px;padding:7px 12px;text-decoration:none}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.main{padding:34px 0}.card{background:var(--panel);border:1px solid var(--line);border-radius:24px;padding:22px;box-shadow:0 14px 35px #1018280d}.card h2,.card h3{margin-top:0}.category-card{text-decoration:none;color:var(--ink);display:block}.category-card .icon{font-size:34px}.muted{color:var(--muted)}.children{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}.pill{display:inline-flex;align-items:center;border:1px solid var(--line);background:#fafafa;border-radius:999px;padding:5px 9px;color:var(--muted);font-size:13px;text-decoration:none}.article-list{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.article-card h3{margin:0 0 7px}.article-card a{text-decoration:none;color:var(--ink)}.article-meta{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0}.layout{display:grid;grid-template-columns:minmax(0,1fr) 315px;gap:24px}.article{background:#fff;border:1px solid var(--line);border-radius:28px;padding:34px}.article h1{font-size:38px;line-height:1.1;margin:0 0 14px}.article h2{border-top:1px solid var(--line);padding-top:22px;margin-top:28px}.article code{background:#eef2f7;border-radius:6px;padding:2px 5px}.article a{color:var(--brand)}.image-suggestion{background:#f0f9ff;border:1px solid #bae6fd;border-radius:18px;padding:16px;margin:20px 0}.callout{background:#fff7ed;border:1px solid #fed7aa;border-radius:18px;padding:16px;margin:18px 0}.sidebar{position:sticky;top:90px;align-self:start}.side-block{background:#fff;border:1px solid var(--line);border-radius:22px;padding:18px;margin-bottom:16px}.side-block h3{margin-top:0}.footer{border-top:1px solid var(--line);background:#fff;padding:28px 0;color:var(--muted);margin-top:30px}.breadcrumb{display:flex;gap:7px;flex-wrap:wrap;color:var(--muted);margin-bottom:18px}.breadcrumb a{color:var(--brand);text-decoration:none}.empty{padding:36px;background:#fff;border-radius:22px;border:1px dashed var(--line)}@media(max-width:900px){.grid,.article-list,.layout{grid-template-columns:1fr}.nav{align-items:flex-start;flex-direction:column}.searchbox{flex-direction:column}.article{padding:24px}.article h1{font-size:31px}.sidebar{position:static}}