.seo-toolbar{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:24px}.seo-toolbar button{border:1px solid var(--line);background:#fff;color:var(--ink);border-radius:99px;padding:8px 14px;font-weight:800;cursor:pointer}.seo-toolbar button.active{background:#243d48;color:#fff;border-color:#243d48}.seo-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.seo-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:11px;padding:22px;box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s}.seo-card:hover{transform:translateY(-3px);box-shadow:0 14px 32px rgba(36,61,72,.12)}.seo-card .category{color:var(--blue);font-size:.64rem;font-weight:900;letter-spacing:.1em}.seo-card h2{font-size:1.08rem;line-height:1.4;margin:8px 0}.seo-card p{color:var(--muted);font-size:.76rem;margin:0 0 18px}.seo-card .card-meta{display:flex;justify-content:space-between;margin-top:auto;padding-top:14px;border-top:1px solid var(--line);font-size:.66rem;color:#87959a}.seo-card a{color:var(--blue);font-weight:900}.article-shell{display:grid;grid-template-columns:minmax(0,780px) 280px;gap:42px;align-items:start}.article-body{background:#fff;border:1px solid var(--line);border-radius:11px;padding:clamp(24px,5vw,52px);box-shadow:var(--shadow)}.article-body h2{font-size:1.45rem;margin:38px 0 12px}.article-body h3{font-size:1.05rem;margin:25px 0 8px}.article-body p,.article-body li{color:#50636b;font-size:.94rem;line-height:1.95}.article-body ul,.article-body ol{padding-left:22px}.article-note{background:#edf5f3;border-left:4px solid var(--blue);padding:15px 17px;margin:24px 0;color:#496169}.article-toc{position:sticky;top:92px;background:#fff;border:1px solid var(--line);border-radius:10px;padding:20px}.article-toc strong{display:block;margin-bottom:9px}.article-toc a{display:block;padding:7px 0;border-top:1px solid #edf0ef;color:#4b7b88;font-size:.75rem;font-weight:800}.article-links{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:35px}.article-links a{background:#edf5f3;border-radius:7px;padding:12px;color:#337080;font-size:.75rem;font-weight:850}@media(max-width:900px){.seo-grid{grid-template-columns:repeat(2,1fr)}.article-shell{grid-template-columns:1fr}.article-toc{position:static;order:-1}.article-links{grid-template-columns:1fr}}@media(max-width:560px){.seo-grid{grid-template-columns:1fr}}