:root{--bg:#f4f5f2;--surface:#fff;--fg:#1c1f22;--muted:#5d646b;--border:#dfe3e6;--accent:#2b6cb0;--accent-fg:#fff;--ok:#2fa84f;--warn:#e3a008;--bad:#e53e3e;--hud-bg:#ffffffed;--hud-fg:#1a1a1a;--hud-dim:#00000040;--ind-on:#c05600;--look-on:#b45309;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#15181b;--surface:#1f2428;--fg:#e8eaec;--muted:#9aa3ab;--border:#343b41;--accent:#6fa8dc;--accent-fg:#0f1418;--hud-bg:#14181cd9;--hud-fg:#fff;--hud-dim:#ffffff4d;--ind-on:#ffb400;--look-on:#ffd34d;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}}:root[data-theme=dark]{--bg:#15181b;--surface:#1f2428;--fg:#e8eaec;--muted:#9aa3ab;--border:#343b41;--accent:#6fa8dc;--accent-fg:#0f1418;--hud-bg:#14181cd9;--hud-fg:#fff;--hud-dim:#ffffff4d;--ind-on:#ffb400;--look-on:#ffd34d;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}*{box-sizing:border-box}[hidden]{display:none!important}html{-webkit-text-size-adjust:100%}body{background:var(--bg);color:var(--fg);margin:0;font-family:-apple-system,Segoe UI,PingFang HK,Microsoft JhengHei,Noto Sans HK,Noto Sans TC,system-ui,sans-serif;line-height:1.65}a{color:var(--accent)}h1,h2,h3{line-height:1.3}.btn{border:1px solid var(--border);background:var(--surface);color:var(--fg);cursor:pointer;border-radius:10px;padding:8px 16px;font-size:1rem;text-decoration:none;display:inline-block}.btn.primary{background:var(--accent);color:var(--accent-fg);border-color:var(--accent)}.btn:hover{filter:brightness(1.05)}.icon-btn{border:1px solid var(--border);cursor:pointer;width:36px;height:32px;color:var(--fg);background:0 0;border-radius:8px;font-size:1.1rem}.site-header{background:var(--surface);border-bottom:1px solid var(--border)}.site-header .inner{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;max-width:960px;margin:0 auto;padding:12px 16px;display:flex}.brand{color:var(--fg);font-size:1.15rem;font-weight:700;text-decoration:none}.site-nav{align-items:center;gap:16px;display:flex}.site-nav a{color:var(--muted);text-decoration:none}.site-nav a[aria-current=page]{color:var(--accent);font-weight:600}main.page{max-width:960px;margin:0 auto;padding:24px 16px 48px}.hero{padding:32px 0 16px}.hero h1{margin:0 0 8px;font-size:2rem}.hero p{color:var(--muted);margin:0 0 16px;font-size:1.1rem}.hero .actions{flex-wrap:wrap;gap:10px;display:flex}.cards{grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px;margin:16px 0;padding:0;list-style:none;display:grid}.card-item{background:var(--surface);border:1px solid var(--border);border-radius:14px;flex-direction:column;gap:8px;padding:18px;display:flex}.card-item h3{margin:0;font-size:1.1rem}.card-item p{color:var(--muted);flex:1;margin:0}.card-item.soon{opacity:.65}.tag{background:var(--border);color:var(--muted);border-radius:999px;align-self:flex-start;padding:2px 8px;font-size:.8rem;display:inline-block}article.lesson{max-width:720px}article.lesson h1{font-size:1.8rem}article.lesson h2{border-top:1px solid var(--border);margin-top:2em;padding-top:.5em;font-size:1.35rem}article.lesson h3{margin-top:1.5em;font-size:1.1rem}article.lesson ol,article.lesson ul{padding-left:1.4em}article.lesson li{margin:.3em 0}.callout{background:var(--surface);border-left:4px solid var(--accent);border-radius:8px;margin:16px 0;padding:12px 16px}.callout.warn{border-left-color:var(--warn)}.lesson-toc{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:12px 20px}.lesson-toc ol{margin:0}.diagram-row{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin:16px 0;display:grid}.diagram-row figure{background:var(--surface);border:1px solid var(--border);border-radius:12px;margin:0;padding:10px}.diagram-row canvas{aspect-ratio:1;border-radius:8px;width:100%;display:block}.diagram-row figcaption{color:var(--muted);margin-top:8px;font-size:.9rem}.steps li{margin:.5em 0}.cta{background:var(--surface);border:1px solid var(--border);border-radius:14px;margin:32px 0;padding:20px}.site-footer{border-top:1px solid var(--border);color:var(--muted);font-size:.85rem}.site-footer .inner{max-width:960px;margin:0 auto;padding:16px}.site-footer a{color:inherit}.footer-meta{margin:8px 0 0}.qr{border-radius:8px;width:200px;max-width:100%;height:auto;display:block}
