:root{--ink:#13233d;--sidebar:#101f37;--sidebar-hover:#213450;--paper:#f7f9fc;--surface:#fff;--line:#dbe2ec;--primary:#2857d6;--primary-ink:#2048b4;--primary-soft:#e9efff;--github:#83dbe8;--english:#9ed2b1;--code:#f2cc6b;--weekly:#aeb7ef;--neutral:#c5ccd8;--muted:#5b687d;--success:#17703d;--danger:#b42318;--danger-soft:#fdecea;--warning:#8a5a00;--warning-soft:#fff4d8;--font-serif:"Songti SC", STSong, "Noto Serif CJK SC", serif;--font-sans:"PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif;--font-mono:ui-monospace, "SF Mono", Menlo, Consolas, monospace;--space-1:8px;--space-2:16px;--space-3:24px;--space-4:32px;--space-5:40px;--space-6:48px;--space-8:64px;--sidebar-width:282px;--topbar-height:68px;--gutter:clamp(20px, 4vw, 56px)}@media (max-width:1279px){:root{--sidebar-width:240px}}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-padding-top:calc(var(--topbar-height) + 16px)}body{color:var(--ink);background:var(--paper);font-family:var(--font-sans);margin:0;font-size:16px;line-height:1.6;overflow-x:hidden}button,input,select{font:inherit;color:inherit}button{cursor:pointer}a{color:inherit}img{max-width:100%}:focus-visible{outline-offset:2px;outline:3px solid #e0a100}.skip-link{z-index:100;background:var(--ink);color:#fff;border-radius:6px;padding:12px 16px;position:fixed;top:-80px;left:16px}.skip-link:focus{top:16px}.visually-hidden{clip:rect(0 0 0 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;position:absolute!important}[data-tone]{--tone:var(--neutral);--tone-soft:#eef0f4;--tone-ink:#485468}[data-tone=github]{--tone:var(--github);--tone-soft:#e3f6f9;--tone-ink:#0f6170}[data-tone=english]{--tone:var(--english);--tone-soft:#e7f5ec;--tone-ink:#22683d}[data-tone=code]{--tone:var(--code);--tone-soft:#fff4d8;--tone-ink:#7a5800}[data-tone=stats]{--tone:var(--weekly);--tone-soft:#eeeffd;--tone-ink:#464f9c}.chip{background:var(--tone-soft);min-height:24px;color:var(--tone-ink);white-space:nowrap;border-radius:5px;align-items:center;gap:6px;padding:0 10px;font-size:12px;font-weight:600;display:inline-flex}.dot{background:var(--tone);border-radius:3px;flex:none;width:8px;height:8px}.button{border:1px solid var(--line);background:var(--surface);min-height:40px;color:var(--ink);white-space:nowrap;border-radius:7px;justify-content:center;align-items:center;gap:6px;padding:0 14px;font-size:14px;text-decoration:none;display:inline-flex}.button:hover{border-color:var(--primary);color:var(--primary-ink)}.button[aria-disabled=true],.button:disabled{opacity:.6;cursor:default}.button-primary{background:var(--primary);border-color:var(--primary);color:#fff}.button-primary:hover{background:var(--primary-ink);color:#fff}@media (pointer:coarse){.button{min-height:44px}}.demo-banner{padding:8px var(--gutter);background:var(--warning-soft);color:var(--warning);border-bottom:1px solid #f0d9a0;font-size:13px}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}@media print{.no-print{display:none!important}body{background:#fff}}