:root{color-scheme:dark;--line:#303b45;--surface:#171e26;--accent:#a8caff;--muted:#adb9c5;font-family:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;background:#10161d;color:#e8edf2}
*{box-sizing:border-box}body{margin:0}a{color:var(--accent);text-underline-offset:.22em}a:hover{color:#d5e5ff}a:focus-visible{outline:2px solid var(--accent);outline-offset:4px}
.wrap{max-width:960px;margin:auto;padding:0 24px}.site-header{border-bottom:1px solid var(--line);background:#151c24}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:70px}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:750;letter-spacing:.04em;text-decoration:none;color:#edf3fa}.brand img{display:block;width:28px;height:28px}.nav{display:flex;gap:18px;flex-wrap:wrap;font-size:.9rem}
main{padding-top:44px;padding-bottom:72px}.eyebrow{color:var(--accent);font-size:.82rem;font-weight:650;letter-spacing:.06em}
h1{font-family:"Iowan Old Style","Songti SC","Noto Serif CJK SC",serif;font-size:clamp(2rem,5vw,3.4rem);font-weight:500;line-height:1.25;margin:.35em 0}.lead{font-size:1.12rem;line-height:1.85;max-width:800px;color:#c9d4df}
.meta,.muted{color:var(--muted)}.actions{display:flex;flex-wrap:wrap;gap:12px;margin:24px 0 34px}
.button{display:inline-block;border:1px solid #52687f;border-radius:8px;padding:11px 20px;text-decoration:none;font-weight:650}
.button.primary{background:var(--accent);border-color:var(--accent);color:#152337}.button:hover{background:#25374b;color:#eef5ff}.button.primary:hover{background:#c5dbff;color:#152337}.prose{line-height:1.85}.prose h2{margin-top:2.4em;padding-top:.8em;border-top:1px solid var(--line)}
.prose h3{margin-top:1.6em}.prose p,.prose li{max-width:860px}.prose li{margin:.4em 0}.prose pre{white-space:pre-wrap;overflow-wrap:anywhere;background:var(--surface);padding:18px;border:1px solid var(--line);border-radius:10px}
.prose code{background:#23303e;padding:.1em .3em;border-radius:4px}.prose pre code{padding:0}.table-scroll{overflow-x:auto}
table{border-collapse:collapse;min-width:680px;width:100%}td,th{text-align:left;vertical-align:top;padding:12px;border-bottom:1px solid var(--line)}th{background:var(--surface)}
.gallery{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px;margin:24px 0}
figure{margin:0;background:var(--surface);border:1px solid var(--line);border-radius:12px;overflow:hidden}figure img{display:block;width:100%;aspect-ratio:4/3;object-fit:cover}figcaption{font-size:.9rem;line-height:1.65;padding:12px}
.chart-gallery figure img{object-fit:contain;background:#fff}
.source-list li{margin:.7em 0}.related{margin-top:64px;padding-top:24px;border-top:1px solid var(--line)}.related ul{columns:2;line-height:2}
footer{border-top:1px solid var(--line);padding:24px 0 38px;color:var(--muted);font-size:.9rem}@media(max-width:640px){.site-header .wrap{flex-wrap:wrap;padding-block:12px}.nav{gap:10px}.related ul{columns:1}}