:root{--bg:#fafaf7;--surface:#fff;--text:#1e3a5f;--muted:#52647a;--rule:#d9dfe5;--accent:#1e3a5f;--brand:#f59e0b;--on-brand:#1e3a5f;--on-accent:#fafaf7;--illustration-bg:#fafaf7;--selection:#f9d68b;--on-selection:#1e3a5f;--family-vla:#2563eb;--family-wm:#e11d48;--family-wam:#7c3aed;--family-policy:#0f766e;--font-sans:"Inter", "Noto Sans CJK SC", system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;--font-mono:"Noto Sans Mono CJK SC", ui-monospace, "SFMono-Regular", "Menlo", "Consolas", monospace;color-scheme:light}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#101a27;--surface:#18273a;--text:#ebeff5;--muted:#acb9ca;--rule:#34465c;--accent:#f5b348;--brand:#f59e0b;--on-brand:#1e3a5f;--on-accent:#101a27;--illustration-bg:#fafaf7;--selection:#705019;--on-selection:#fff;--family-vla:#60a5fa;--family-wm:#fb7185;--family-wam:#a78bfa;--family-policy:#2dd4bf;color-scheme:dark}}:root[data-theme=dark]{--bg:#101a27;--surface:#18273a;--text:#ebeff5;--muted:#acb9ca;--rule:#34465c;--accent:#f5b348;--brand:#f59e0b;--on-brand:#1e3a5f;--on-accent:#101a27;--illustration-bg:#fafaf7;--selection:#705019;--on-selection:#fff;--family-vla:#60a5fa;--family-wm:#fb7185;--family-wam:#a78bfa;--family-policy:#2dd4bf;color-scheme:dark}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth;scrollbar-color:var(--muted) var(--bg)}body{background:var(--bg);color:var(--text);font-family:var(--font-sans);overflow-wrap:break-word;margin:0;font-size:1.0625rem;line-height:1.65}:lang(zh) body,body:lang(zh){line-height:1.8}::selection{background:var(--selection);color:var(--on-selection)}input,textarea{caret-color:var(--accent)}img,svg,video{max-width:100%;height:auto}a{color:var(--accent);text-underline-offset:.22em;text-decoration-thickness:1px}a:hover{text-decoration-thickness:2px}:focus-visible{outline:2px solid var(--accent);outline-offset:4px}main:focus{outline:none}h1,h2,h3{letter-spacing:-.025em;text-wrap:balance;margin:0 0 .5em;line-height:1.2}:lang(zh) h1,:lang(zh) h2,:lang(zh) h3{letter-spacing:0;line-height:1.35}p{margin:0 0 1em}.container{width:100%;max-width:100rem;margin-inline:auto;padding-inline:2rem}.narrow{max-width:48rem}.muted{color:var(--muted)}.button{border:1px solid var(--brand);background:var(--brand);min-height:3rem;color:var(--on-brand);font:inherit;cursor:pointer;border-radius:4px;justify-content:center;align-items:center;gap:.75rem;padding:.7rem 1.2rem;font-weight:650;text-decoration:none;display:inline-flex}.button:hover{filter:brightness(.97);text-decoration:none}.button.secondary{color:var(--text);border-color:var(--rule);background:0 0}.button[disabled]{cursor:not-allowed;opacity:.6;filter:none}.card{background:var(--surface);border:1px solid var(--rule);border-radius:12px;padding:1.5rem}.badge{border:1px solid var(--rule);color:var(--muted);white-space:nowrap;border-radius:4px;padding:.3em .6em;font-size:.75rem;font-weight:550;line-height:1.3;display:inline-block}.badge[data-status=draft],.badge[data-status=review]{color:var(--text);background:var(--surface)}.badge[data-status=published]{color:var(--on-accent);background:var(--accent);border-color:var(--accent)}.visually-hidden{clip:rect(0,0,0,0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}:root[data-theme=light] .on-dark,:root[data-theme=dark] .on-light{display:none}@media (prefers-color-scheme:light){:root:not([data-theme]) .on-dark{display:none}}@media (prefers-color-scheme:dark){:root:not([data-theme]) .on-light{display:none}}.menu{position:relative}.menu>summary{list-style:none}.menu>summary::-webkit-details-marker{display:none}.menu-panel{border:1px solid var(--rule);background:var(--surface);z-index:10;border-radius:12px;margin:0;padding:.4rem;list-style:none;position:absolute;top:calc(100% + .6rem)}.menu-row{min-height:2.75rem;color:var(--text);border-radius:8px;align-items:center;gap:.75rem;padding:.5rem .75rem;font-size:.9375rem;text-decoration:none;display:flex}a.menu-row:hover{background:var(--bg);text-decoration:none}.menu-row[aria-current]{font-weight:650}@media (width<=639px){.container{padding-inline:1.25rem}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{transition:none!important;animation:none!important}}.sheet{grid-template-columns:minmax(0,1fr) minmax(0,1fr);column-gap:1.5rem;margin-top:5.5rem;scroll-margin-top:1rem;display:grid}.sheet:before{content:"";border-top:1px solid var(--text);grid-column:1/-1}.sheet-head{min-width:0;padding:1.75rem 1.5rem 2.5rem}.sheet-head>h2{margin:0;font-size:clamp(1.5rem,2.1vw,2rem);line-height:1.25}.sheet-note{color:var(--muted);max-width:34rem;margin:.85rem 0 0;font-size:1rem}.sheet-note a{color:var(--text)}.sheet-body{min-width:0;padding-inline-end:1.5rem}.specimen{background:var(--surface);border:1px solid var(--rule);border-radius:10px;max-width:40rem;margin:2rem 0 0;padding:1.25rem 1.5rem 1.35rem}.specimen>figcaption{color:var(--muted);margin-bottom:.9rem;font-size:.8125rem;font-weight:650}@media (width<=960px){.sheet{grid-template-columns:minmax(0,1fr);margin-top:4rem}.sheet-head{padding:1.5rem 0 1.25rem}.sheet-body{padding-inline-end:0}.specimen{margin-top:1.5rem;padding:1rem 1rem 1.1rem}}.prose{font-size:1.0625rem}.prose h2{margin-top:2.2em;font-size:1.5rem}.prose h3{margin-top:1.8em;font-size:1.2rem}.prose ul,.prose ol{padding-left:1.4em}.prose li+li{margin-top:.3em}.prose blockquote{border-inline-start:1px solid var(--rule);color:var(--muted);margin:1.5em 0;padding:.25em 0 .25em 1em}.prose code{font-family:var(--font-mono);background:var(--surface);border:1px solid var(--rule);border-radius:6px;padding:.1em .35em;font-size:.9em}.prose pre{background:var(--surface);border:1px solid var(--rule);border-radius:10px;padding:1em;overflow-x:auto}.prose pre code{background:0 0;border:0;padding:0}.prose table{border-collapse:collapse;margin:1.5em 0;font-size:.95rem;display:block;overflow-x:auto}.prose th,.prose td{border:1px solid var(--rule);text-align:left;vertical-align:top;padding:.5em .75em}.prose th{background:var(--surface)}.prose img{border:1px solid var(--rule);border-radius:10px;margin:1.5em auto;display:block}.prose hr{border:0;border-top:1px solid var(--rule);margin:2.5em 0}.prose .katex-display{padding:.25em 0;overflow:auto hidden}.prose .katex{font-size:1.08em}