:root{--brand:#5b6cff;--brand2:#8a5bff;--ink:#1f2330;--muted:#6b7280;--bg:#f6f7fb;--line:#e7e9f2}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);line-height:1.75}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.seo-wrap{max-width:1080px;margin:0 auto;padding:0 20px}
.seo-header{background:linear-gradient(120deg,var(--brand),var(--brand2));color:#fff;position:sticky;top:0;z-index:10}
.seo-header .seo-wrap{display:flex;align-items:center;justify-content:space-between;height:60px}
.seo-logo{font-size:20px;font-weight:700;color:#fff}
.seo-nav a{color:#fff;margin-left:18px;opacity:.95}
.seo-main{padding:32px 20px 48px}
.seo-page-title{font-size:30px;margin:8px 0 12px}
.seo-lead{color:var(--muted);font-size:16px;max-width:820px;margin:0 0 28px}
.seo-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px}
.seo-card{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:.2s}
.seo-card:hover{box-shadow:0 8px 24px rgba(91,108,255,.15);transform:translateY(-2px)}
.seo-card-link{display:block;color:inherit}
.seo-card-img{width:100%;height:160px;object-fit:cover;display:block}
.seo-card-body{padding:14px 16px}
.seo-card-title{font-size:17px;margin:0 0 8px;line-height:1.4}
.seo-card-meta{font-size:13px;color:var(--muted);margin:0 0 6px;display:flex;gap:10px;align-items:center}
.seo-cat{background:#eef0ff;color:var(--brand);padding:1px 8px;border-radius:6px;font-size:12px}
.seo-card-sum{font-size:14px;color:var(--muted);margin:0}
.seo-article{max-width:820px}
.seo-crumb{color:var(--muted);font-size:14px}
.seo-h1{font-size:30px;line-height:1.35;margin:6px 0 10px}
.seo-meta{color:var(--muted);font-size:14px;display:flex;gap:14px;flex-wrap:wrap;margin:0 0 18px}
.seo-cover{width:100%;border-radius:12px;margin:0 0 22px}
.seo-content{font-size:16px}
.seo-content h2,.seo-content h3{margin:28px 0 12px;line-height:1.4}
.seo-content p{margin:0 0 16px}
.seo-content img{max-width:100%;border-radius:10px}
.seo-content ul,.seo-content ol{padding-left:22px;margin:0 0 16px}
.seo-content li{margin:6px 0}
.seo-tags{margin:24px 0;padding:16px;background:#fff;border:1px solid var(--line);border-radius:12px}
.seo-tags h3{margin:0 0 10px;font-size:16px}
.seo-tag{display:inline-block;background:#eef0ff;color:var(--brand);padding:4px 10px;border-radius:999px;font-size:13px;margin:4px 6px 4px 0}
.seo-cta{background:linear-gradient(120deg,#eef0ff,#f3ecff);border:1px solid var(--line);border-radius:12px;padding:16px 18px;margin:24px 0;font-size:15px}
.seo-kw-block{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px 20px;margin:0 0 18px}
.seo-kw-cat{margin:0 0 12px;font-size:20px}
.seo-kw-cat small{color:var(--muted);font-size:14px;font-weight:400}
.seo-footer{background:#1f2330;color:#cdd2e0;margin-top:40px;padding:28px 0}
.seo-footer .seo-wrap{font-size:14px}
.seo-footer .seo-muted{color:#8a90a6;font-size:13px;margin-top:8px}
.seo-muted{color:var(--muted)}