*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--bg-deep:#06080d;--bg-card:#0c1017;--bg-surface:#151c28;--border:#1a2332;--border-bright:#2a3a52;--text-primary:#e8edf5;--text-secondary:#9aa8ba;--text-muted:#66758a;--accent-cyan:#00d4ff;--accent-green:#00ff88;--accent-orange:#ff8a00;--radius:12px;--font-sans:'Noto Sans SC',system-ui,sans-serif;--font-mono:'JetBrains Mono',monospace}
[data-theme="light"]{--bg-deep:#f5f7fa;--bg-card:#fff;--bg-surface:#eef1f5;--border:#dde1e8;--border-bright:#c5ccd6;--text-primary:#1a1f2e;--text-secondary:#5a6578;--text-muted:#8895a7;--accent-cyan:#0099cc;--accent-green:#00a855;--accent-orange:#d97706}
html{font-size:16px;scroll-behavior:smooth}body{font-family:var(--font-sans);background:var(--bg-deep);color:var(--text-primary);line-height:1.75;-webkit-font-smoothing:antialiased}a{color:var(--accent-cyan);text-decoration:none}a:hover{text-decoration:underline}.container{max-width:1180px;margin:0 auto;padding:0 24px}.narrow{max-width:920px}.site-header{position:sticky;top:0;z-index:20;background:rgba(6,8,13,.9);backdrop-filter:blur(18px);border-bottom:1px solid var(--border)}[data-theme="light"] .site-header{background:rgba(245,247,250,.9)}.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}.logo{font-family:var(--font-mono);font-weight:700;color:var(--accent-cyan)}.nav-links{display:flex;gap:24px;align-items:center}.nav-links a{font-size:.875rem;color:var(--text-secondary)}.theme-toggle{background:transparent;border:1px solid var(--border);color:var(--text-secondary);border-radius:6px;padding:4px 10px;cursor:pointer}.seo-hero{padding:96px 0 56px;text-align:center}.back-link{display:inline-block;margin-bottom:20px;color:var(--text-muted);font-size:.9rem}.hero-badge{display:inline-flex;border:1px solid rgba(0,212,255,.25);background:rgba(0,212,255,.08);color:var(--accent-cyan);border-radius:999px;padding:5px 14px;font-family:var(--font-mono);font-size:.78rem;margin-bottom:24px}.seo-hero h1{font-size:clamp(2rem,4vw,3.4rem);line-height:1.15;margin-bottom:18px;font-weight:900;letter-spacing:-.02em}.hero-sub{max-width:760px;margin:0 auto;color:var(--text-secondary);font-size:1.05rem}.last-updated{margin-top:18px;color:var(--text-muted);font-family:var(--font-mono);font-size:.82rem}.content-section{padding:40px 0 80px}.content-section h2{font-size:1.45rem;margin:38px 0 16px}.content-section h3{font-size:1.05rem;margin-bottom:12px}.content-section p{color:var(--text-secondary);margin:12px 0}.answer-block,.source-note,.panel{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:22px}.answer-block{font-size:1rem}.source-note{margin-top:32px;color:var(--text-secondary);border-color:rgba(255,138,0,.25);background:rgba(255,138,0,.06)}.table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius);background:var(--bg-card)}table{width:100%;min-width:760px;border-collapse:collapse}th,td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--border);vertical-align:top}th{background:var(--bg-surface);color:var(--text-primary);font-size:.82rem}td{color:var(--text-secondary);font-size:.92rem}tr:last-child td{border-bottom:none}.grid.two{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.check-list,.steps{padding-left:22px;color:var(--text-secondary)}.check-list li,.steps li{margin:9px 0}details{border-bottom:1px solid var(--border);padding:16px 0}summary{cursor:pointer;color:var(--text-primary);font-weight:600}.site-footer{border-top:1px solid var(--border);padding:40px 0;text-align:center}.footer-disclaimer{font-size:.8rem;color:var(--text-muted);max-width:760px;margin:0 auto 18px}.footer-links{display:flex;justify-content:center;gap:22px;flex-wrap:wrap}.footer-links a{font-size:.85rem;color:var(--text-secondary)}.footer-copy{margin-top:16px;font-size:.75rem;color:var(--text-muted)}
@media(max-width:760px){.container{padding:0 16px}.nav-links{display:none}.seo-hero{padding:72px 0 36px}.grid.two{grid-template-columns:1fr}table{min-width:680px}}