:root{color-scheme:dark;--seo-bg:#07111f;--seo-panel:#0f1d30;--seo-text:#e6edf7;--seo-muted:#91a4bc;--seo-line:#22334a;--seo-accent:#38bdf8;--seo-accent-2:#22d3ee}
*{box-sizing:border-box}
body.seo-page{margin:0;overflow-x:hidden;background:radial-gradient(circle at 75% -10%,rgba(56,189,248,.16),transparent 32rem),var(--seo-bg);color:var(--seo-text);font:16px/1.75 Inter,"PingFang SC","Microsoft YaHei",sans-serif}
.seo-page a{color:var(--seo-accent);text-decoration-thickness:.08em;text-underline-offset:.18em}
.seo-page a:hover{color:var(--seo-accent-2)}
.seo-skip{position:absolute;left:-9999px;top:10px}.seo-skip:focus{left:10px;z-index:10;background:#fff;color:#111;padding:8px 12px;border-radius:6px}
.seo-header{position:sticky;top:0;z-index:5;display:flex;align-items:center;justify-content:space-between;gap:24px;padding:14px max(20px,calc((100vw - 1040px)/2));background:rgba(7,17,31,.9);border-bottom:1px solid var(--seo-line);backdrop-filter:blur(14px)}
.seo-brand{display:inline-flex;align-items:center;gap:10px;color:var(--seo-text)!important;font-weight:750;text-decoration:none}.seo-brand img{width:30px;height:30px;border-radius:8px}.seo-header nav{display:flex;gap:18px}.seo-header nav a{color:var(--seo-muted);text-decoration:none;font-size:14px}
.seo-main{width:min(860px,calc(100% - 36px));margin:0 auto;padding:66px 0 72px}.seo-main article{background:rgba(15,29,48,.72);border:1px solid var(--seo-line);border-radius:18px;padding:clamp(24px,5vw,52px)}
.seo-eyebrow{margin:0 0 8px;color:var(--seo-accent-2);font-size:13px;font-weight:800;letter-spacing:.14em}.seo-main h1{margin:0 0 18px;overflow-wrap:anywhere;font-size:clamp(30px,5vw,50px);line-height:1.2;letter-spacing:-.035em}.seo-main h2{margin:38px 0 8px;font-size:22px;line-height:1.35}.seo-main p{margin:0 0 15px}.seo-lead{max-width:720px;color:#c3d2e4;font-size:19px}.seo-meta{color:var(--seo-muted);font-size:14px}.seo-topic{display:inline-block;margin-top:18px!important;padding:5px 10px;border:1px solid var(--seo-line);border-radius:999px;color:var(--seo-muted);font-size:13px}
.seo-breadcrumb{display:flex;gap:8px;align-items:center;margin:0 0 22px;color:var(--seo-muted);font-size:13px}.seo-breadcrumb a{color:var(--seo-muted)}.seo-action{padding:1px 20px 4px;border-left:3px solid var(--seo-accent);background:rgba(56,189,248,.07)}.seo-source{margin-top:40px;padding-top:2px;border-top:1px solid var(--seo-line)}
.seo-related{margin-top:40px;padding-top:2px;border-top:1px solid var(--seo-line)}.seo-related ul{display:grid;gap:10px;margin:0;padding:0;list-style:none}.seo-related li{display:flex;flex-wrap:wrap;gap:4px 12px;align-items:baseline;padding:10px 0;border-bottom:1px solid var(--seo-line)}.seo-related li a{font-weight:650}.seo-related li span{color:var(--seo-muted);font-size:13px}
.seo-founder-profile{display:grid;grid-template-columns:180px minmax(0,1fr);gap:28px;align-items:center;margin:28px 0 42px}.seo-founder-profile>img{width:180px;height:180px;object-fit:cover;border:1px solid var(--seo-line);border-radius:22px;background:var(--seo-panel)}.seo-contact-list{display:grid;gap:8px;margin:0;padding:0;list-style:none}.seo-faq section{scroll-margin-top:90px}
.seo-fact-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:30px 0}.seo-fact-card{padding:20px;border:1px solid var(--seo-line);border-radius:14px;background:rgba(7,17,31,.42)}.seo-fact-card h2{margin:0 0 8px;font-size:18px}.seo-fact-card p:last-child{margin-bottom:0}.db-hero-proof{margin:10px 0 0;color:#b8c9dc;font-size:13px;line-height:1.6}.db-hero-proof strong{color:#e6edf7}
.seo-index{width:min(1040px,calc(100% - 36px))}.seo-card-list{display:grid;gap:14px;margin-top:36px}.seo-card{padding:22px 24px;background:rgba(15,29,48,.72);border:1px solid var(--seo-line);border-radius:14px}.seo-card h2{margin:3px 0 8px;font-size:20px}.seo-card h2 a{color:var(--seo-text);text-decoration:none}.seo-card p:last-child{margin:0;color:#b7c7da}.seo-empty{padding:26px;border:1px dashed var(--seo-line);border-radius:14px}.seo-empty h2{margin-top:0}
.seo-guide-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin:34px 0}.seo-guide-card{padding:24px;background:rgba(15,29,48,.72);border:1px solid var(--seo-line);border-radius:16px}.seo-guide-card h2{margin:4px 0 10px;font-size:21px}.seo-guide-card h2 a{color:var(--seo-text);text-decoration:none}.seo-guide-card p:last-child{margin:0;color:#b7c7da}.seo-callout{margin:30px 0;padding:4px 22px 8px;border:1px solid rgba(56,189,248,.28);border-radius:14px;background:rgba(56,189,248,.07)}.seo-callout h2{margin-top:20px}.seo-toc{display:flex;flex-wrap:wrap;gap:8px 14px;margin:28px 0;padding:18px;border:1px solid var(--seo-line);border-radius:12px;background:rgba(7,17,31,.45)}.seo-toc strong{width:100%;font-size:14px}.seo-toc a{font-size:13px}.seo-checklist{display:grid;gap:8px;padding-left:22px}.seo-checklist li::marker{color:var(--seo-accent)}.seo-table-wrap{overflow-x:auto}.seo-table{width:100%;min-width:620px;border-collapse:collapse;margin:16px 0 8px}.seo-table th,.seo-table td{padding:12px 14px;border:1px solid var(--seo-line);text-align:left;vertical-align:top}.seo-table th{background:rgba(56,189,248,.08);color:#d8e8f7}.seo-formula{padding:14px 18px;border-left:3px solid var(--seo-accent-2);background:rgba(34,211,238,.07);font-weight:700;letter-spacing:.01em}
.seo-footer{padding:30px 18px 46px;border-top:1px solid var(--seo-line);color:var(--seo-muted);text-align:center;font-size:13px}.seo-footer p{margin:3px 0}
.db-hero-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}.db-hero-links a{display:inline-flex;padding:6px 11px;border:1px solid rgba(125,211,252,.28);border-radius:999px;color:#bae6fd;font-size:12px;text-decoration:none;background:rgba(14,165,233,.08)}.db-hero-links a:hover{border-color:rgba(34,211,238,.7);color:#ecfeff}
@media(max-width:640px){.seo-header{position:static;align-items:flex-start;flex-direction:column;gap:10px;padding:12px 18px}.seo-header nav{width:100%;gap:8px 12px;flex-wrap:wrap;justify-content:flex-start}.seo-header nav a{font-size:12px}.seo-main{padding-top:40px}.seo-main article{padding:24px 20px}.seo-card{padding:18px}.seo-main h1{font-size:32px}.seo-founder-profile{grid-template-columns:1fr;gap:18px}.seo-founder-profile>img{width:140px;height:140px}.seo-guide-grid,.seo-fact-grid{grid-template-columns:1fr}.seo-guide-card{padding:20px}}