:root{color-scheme:light;--bg: #f7f8fb;--panel: #ffffff;--text: #18202b;--muted: #5d6978;--line: #dfe5ec;--accent: #0f766e;--accent-strong: #155e75;--accent-soft: #e7f5f2;--blue-soft: #edf4ff;--warning-soft: #fff7e6;--radius: 8px;--shadow: 0 18px 50px rgba(22, 35, 52, .08)}*{box-sizing:border-box}html{font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Microsoft YaHei,sans-serif;background:var(--bg);color:var(--text)}body{margin:0;min-width:320px}a{color:inherit;text-decoration:none}a:hover{color:var(--accent-strong)}p{color:var(--muted);line-height:1.75}.site-header,.site-footer{max-width:1180px;margin:0 auto;padding:18px 24px}.site-header{display:flex;align-items:center;justify-content:space-between;gap:24px}.brand,.site-header nav{display:flex;align-items:center}.brand{gap:10px;font-weight:760}.brand-mark{display:grid;place-items:center;width:32px;height:32px;border-radius:7px;background:var(--text);color:#fff}.site-header nav{gap:18px;color:var(--muted);font-size:14px}.site-footer{border-top:1px solid var(--line);margin-top:64px;color:var(--muted);font-size:14px}.container{max-width:1180px;margin:0 auto;padding:0 24px}.section{padding:44px 0}.hero{padding:56px 0 34px}.hero-grid{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(320px,.8fr);gap:36px;align-items:center}.eyebrow,.card-kicker,.meta{color:var(--accent-strong);font-size:13px;font-weight:720}h1{font-size:clamp(34px,5vw,64px);line-height:1.08;letter-spacing:0;margin:14px 0 18px}h2{font-size:24px;line-height:1.28;letter-spacing:0;margin:8px 0 10px}h3{font-size:18px;margin:22px 0 8px}.lead{font-size:18px;max-width:720px}.grid{display:grid;gap:18px}.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}.tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}.tags span{background:var(--accent-soft);border-radius:999px;color:var(--accent-strong);font-size:12px;padding:5px 9px}.button,button{display:inline-flex;align-items:center;justify-content:center;min-height:40px;border:1px solid var(--line);border-radius:7px;padding:0 14px;color:var(--text);background:#fff;font-weight:700}.button.primary{background:var(--accent);border-color:var(--accent);color:#fff}.card-actions,.actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.feature-panel{background:linear-gradient(135deg,rgba(15,118,110,.1),transparent),linear-gradient(225deg,rgba(21,94,117,.12),transparent),#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}.metric-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:18px}.metric{background:#ffffffc2;border:1px solid var(--line);border-radius:7px;padding:14px}.metric strong{display:block;font-size:20px}.ad-slot{border:1px dashed #b6c3cf;border-radius:var(--radius);background:#fbfcfd;color:var(--muted);display:grid;gap:4px;min-height:90px;place-items:center;padding:16px;text-align:center}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:30px;align-items:start}.article-content{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:30px}.article-content img{max-width:100%;border-radius:var(--radius)}.article-content a{color:var(--accent-strong);text-decoration:underline;text-underline-offset:3px}.article-content pre{overflow-x:auto;border-radius:var(--radius);padding:16px;background:#101820;color:#edf5f7}.article-content .mermaid{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff;margin:24px 0;padding:18px}.article-content code{font-family:SFMono-Regular,Consolas,Liberation Mono,monospace}.article-content :not(pre)>code{background:var(--blue-soft);border-radius:5px;padding:2px 5px}.tool-frame{width:100%;min-height:780px;border:1px solid var(--line);border-radius:var(--radius);background:#fff}@media(max-width:860px){.site-header{align-items:flex-start;flex-direction:column}.site-header nav{flex-wrap:wrap}.hero-grid,.grid.two,.grid.three,.article-layout{grid-template-columns:1fr}h1{font-size:36px}.metric-row{grid-template-columns:1fr}}