:root{--brand-cobalt:#1f3aa8;--brand-cobalt-strong:#1a2f87;--brand-cobalt-tint:#eef1fb;--paper:#f7f5f0;--paper-raised:#fbfaf6;--paper-line:#ece7dd;--paper-deep:#f1ede4;--ink-1:#1c1b18;--ink-2:#4a4843;--ink-3:#7a7770;--ink-4:#a8a59e;--border-1:#e3ddd1;--border-2:#d8d1c3;--error:#b3261e;--warning:#8a5a00;--success:#1f6b3c;--highlight:#fff3b0;--marker:#f1ede4;--r-search:14px;--r-control:10px;--r-tag:999px;--r-card:12px;--font-latin:"Geist","Inter",ui-sans-serif,system-ui,-apple-system,"Segoe UI","Helvetica Neue",Arial,sans-serif;--font-cjk:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC","Noto Sans SC",system-ui,sans-serif;--font-pinyin:"Söhne","Geist",ui-sans-serif,system-ui,sans-serif;--t-display:clamp(2.5rem,5vw + 0.5rem,4.5rem);--t-h1:clamp(1.875rem,2.5vw + 0.5rem,2.75rem);--t-h2:1.5rem;--t-h3:1.125rem;--t-body:1rem;--t-small:0.875rem;--t-xs:0.75rem;--ease:cubic-bezier(0.16,1,0.3,1);--dur-fast:120ms;--dur-base:180ms;--dur-slow:220ms;--shadow-pop:0 1px 0 rgba(28,27,24,.04),0 8px 24px -12px rgba(28,27,24,.18);--shadow-input:0 0 0 4px rgba(31,58,168,.12);--z-nav:40;--z-pop:60;--z-toast:80}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--paper:#161513;--paper-raised:#1c1a18;--paper-line:#262320;--paper-deep:#211f1c;--ink-1:#f3efe6;--ink-2:#c4bfb6;--ink-3:#8e8980;--ink-4:#5d5a55;--border-1:#2c2925;--border-2:#3a3631;--brand-cobalt:#6f8df0;--brand-cobalt-strong:#8aa4f4;--brand-cobalt-tint:#1a2350;--highlight:#5a4a18;--marker:#262320;--shadow-pop:0 1px 0 rgba(0,0,0,.4),0 12px 30px -16px rgba(0,0,0,.5);--shadow-input:0 0 0 4px rgba(111,141,240,.22)}}:root[data-theme=dark]{--paper:#161513;--paper-raised:#1c1a18;--paper-line:#262320;--paper-deep:#211f1c;--ink-1:#f3efe6;--ink-2:#c4bfb6;--ink-3:#8e8980;--ink-4:#5d5a55;--border-1:#2c2925;--border-2:#3a3631;--brand-cobalt:#6f8df0;--brand-cobalt-strong:#8aa4f4;--brand-cobalt-tint:#1a2350;--highlight:#5a4a18;--marker:#262320;--shadow-pop:0 1px 0 rgba(0,0,0,.4),0 12px 30px -16px rgba(0,0,0,.5);--shadow-input:0 0 0 4px rgba(111,141,240,.22)}*,:after,:before{box-sizing:border-box}html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility;scroll-behavior:smooth}body{margin:0;font-family:var(--font-latin);color:var(--ink-1);background:var(--paper);line-height:1.55;font-feature-settings:"ss01","cv11";min-height:100dvh}[lang^=zh]{font-family:var(--font-cjk)}[lang^=zh].phrase{font-feature-settings:"palt"}h1,h2,h3,h4,h5,h6{margin:0;font-weight:600;letter-spacing:-.01em}p{margin:0}a{color:inherit;text-decoration:none}button{background:none;border:0;padding:0;cursor:pointer}button,input,select,textarea{font:inherit;color:inherit}:focus-visible{outline:2px solid var(--brand-cobalt);outline-offset:2px;border-radius:4px}::selection{background:var(--brand-cobalt-tint);color:var(--ink-1)}.container{width:100%;max-width:1200px;margin-inline:auto;padding-inline:24px}@media (max-width:640px){.container{padding-inline:20px}}.stack-1{gap:8px}.stack-1,.stack-2{display:flex;flex-direction:column}.stack-2{gap:16px}.stack-3{gap:24px}.stack-3,.stack-4{display:flex;flex-direction:column}.stack-4{gap:40px}.stack-5{gap:64px}.stack-5,.stack-6{display:flex;flex-direction:column}.stack-6{gap:96px}@media (prefers-reduced-motion:reduce){*,:after,:before{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}}.skip-link{position:absolute;top:-100px;left:16px;background:var(--ink-1);color:var(--paper);padding:10px 14px;border-radius:8px;z-index:var(--z-toast);transition:top var(--dur-base) var(--ease)}.skip-link:focus{top:16px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}[aria-live]{speak:normal}.usage-tag{display:inline-flex;align-items:center;padding:4px 10px;border-radius:var(--r-tag);font-size:var(--t-xs);font-weight:500;line-height:1.4;border:1px solid transparent;white-space:nowrap}.usage-tag-primary{background:var(--brand-cobalt-tint);color:var(--brand-cobalt-strong);border-color:color-mix(in srgb,var(--brand-cobalt) 22%,transparent)}:root[data-theme=dark] .usage-tag-primary{color:var(--brand-cobalt)}.usage-tag-common{background:color-mix(in srgb,var(--ink-3) 14%,transparent);color:var(--ink-1)}.usage-tag-contextual{background:color-mix(in srgb,var(--warning) 12%,transparent);color:var(--warning)}.usage-tag-marked{background:color-mix(in srgb,var(--ink-3) 10%,transparent);color:var(--ink-2)}.usage-tag-draft{background:color-mix(in srgb,var(--warning) 12%,transparent);color:var(--warning);border-color:color-mix(in srgb,var(--warning) 25%,transparent)}