*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body,h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd,fieldset,legend{margin:0;padding:0}ul[class],ol[class]{margin:0;padding:0;list-style:none}img,picture,video,canvas{display:block;max-inline-size:100%}[hidden]{display:none!important}input,button,select,textarea{font:inherit;color:inherit}button{cursor:pointer;background:none;border:0}table{border-collapse:collapse}:root{color-scheme:light}:root[data-theme=dark]{color-scheme:dark}body{background:var(--bg);color:var(--ink);font-family:var(--font-current, var(--font-ui));font-size:var(--fs-1);line-height:var(--lh-current, var(--lh-body));min-block-size:100vh;-webkit-font-smoothing:antialiased}html:lang(ar){--font-current: var(--font-ar);--lh-current: 1.75}html:lang(zh){--font-current: var(--font-zh)}[lang|=ar]{--font-current: var(--font-ar)}[lang|=zh]{--font-current: var(--font-zh)}[lang]{font-family:var(--font-current, var(--font-ui))}h1,h2,h3,h4,h5,h6{font-weight:800;line-height:var(--lh-tight);text-wrap:balance}h1{font-size:var(--fs-5);letter-spacing:-.022em}h2{font-size:var(--fs-4);letter-spacing:-.016em}h3{font-size:var(--fs-3);letter-spacing:-.01em}h4{font-size:var(--fs-2)}h5{font-size:var(--fs-1)}h6{font-size:var(--fs-0);text-transform:uppercase;letter-spacing:.1em}:lang(ar) h1,:lang(ar) h2,:lang(ar) h3,:lang(zh) h1,:lang(zh) h2,:lang(zh) h3,:lang(ar) h6,:lang(ar) .eyebrow{letter-spacing:0}:lang(ar) h1,:lang(ar) h2,:lang(ar) h3,:lang(ar) h4,:lang(ar) h5,:lang(ar) h6{line-height:1.35}p{text-wrap:pretty}a{color:var(--brand);text-underline-offset:.15em}a:hover{text-decoration-thickness:2px}strong,b{font-weight:800}code,kbd,samp,pre{font-family:ui-monospace,SFMono-Regular,SF Mono,Menlo,Consolas,monospace;font-size:.92em;direction:ltr;unicode-bidi:isolate}code[lang],kbd[lang],samp[lang],pre[lang]{font-family:ui-monospace,SFMono-Regular,SF Mono,Menlo,Consolas,monospace}hr{border:0;border-block-start:1px solid var(--line)}:focus-visible{outline:2px solid var(--brand);outline-offset:2px}:focus:not(:focus-visible){outline:none}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}.i18n-missing{outline:2px dashed var(--danger)}.visually-hidden{position:absolute;inline-size:1px;block-size:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}.skip-link{position:absolute;z-index:30;inset-block-start:var(--sp-2);inset-inline-start:var(--sp-2);padding:var(--sp-2) var(--sp-4);border-radius:var(--r-1);background:var(--brand);color:var(--brand-ink);font-weight:600;text-decoration:none;translate:0 -300%;transition:translate var(--t-fast) ease-out}.skip-link:focus{translate:0 0}.stack{display:flex;flex-direction:column;gap:var(--stack-gap, var(--sp-4))}.row{display:flex;flex-wrap:wrap;align-items:center;gap:var(--row-gap, var(--sp-3))}.wrap-narrow{max-inline-size:68ch;margin-inline:auto}.wrap-page{inline-size:100%;max-inline-size:72rem;margin-inline:auto;padding-inline:var(--sp-4)}.eyebrow{font-size:var(--fs-0);font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-2)}.eyebrow code{text-transform:none;letter-spacing:0}.lede{font-size:var(--fs-2);color:var(--ink-2);max-inline-size:52ch}.site-nav{background:var(--surface);--site-mast-block: calc(2.75rem + 6px + var(--sp-2) * 2)}@media(min-width:46rem){.site-nav{position:sticky;inset-block-start:calc(-1 * var(--site-mast-block));z-index:20}}.site-nav__mast-inner{display:flex;flex-wrap:wrap;align-items:center;gap:var(--sp-3);min-block-size:var(--site-mast-block);padding-block:var(--sp-2)}.site-brand{display:inline-flex;align-items:center;gap:var(--sp-2);flex:none;color:var(--ink);font-size:var(--fs-2);font-weight:800;letter-spacing:-.02em;text-decoration:none}.site-brand__mark{inline-size:1.4em;block-size:1.4em;flex:none}.site-brand--small{font-size:var(--fs-1)}.site-nav__rail{border-block:1px solid var(--line)}.site-nav__rail-inner{display:flex;gap:var(--sp-1);overflow-x:auto;overscroll-behavior-inline:contain;scrollbar-width:none}.site-nav__rail-inner::-webkit-scrollbar{display:none}.site-nav__rail a{flex:none;padding:var(--sp-3);color:var(--ink-2);font-size:var(--fs-0);font-weight:600;text-decoration:none;border-block-end:3px solid transparent;transition:color var(--t-fast) ease-out,border-color var(--t-fast) ease-out}.site-nav__rail a:hover{color:var(--ink)}.site-nav__rail a[aria-current=page],.site-nav__rail a[aria-current=location]{color:var(--brand);border-block-end-color:var(--brand)}.site-lang,.site-tools{position:relative;flex:none}.site-lang{margin-inline-start:auto}.site-tools{display:none}.site-disc{display:inline-flex;align-items:center;gap:var(--sp-2);min-block-size:2.75rem;padding-inline:var(--sp-3);background:var(--surface);color:var(--ink);border:1px solid var(--line);border-radius:var(--r-round);font-size:var(--fs-0);font-weight:600;cursor:pointer;list-style:none}.site-disc::-webkit-details-marker{display:none}.site-disc:hover{border-color:var(--ink-2)}details[open]>.site-disc{border-color:var(--brand);color:var(--brand)}.site-disc--icon{min-inline-size:2.75rem;justify-content:center;padding-inline:var(--sp-2)}.site-disc__chevron{inline-size:1em;block-size:1em;color:var(--ink-2)}details[open]>.site-disc .site-disc__chevron{color:inherit;rotate:180deg}.site-panel{position:absolute;inset-block-start:calc(100% + var(--sp-2));z-index:40;min-inline-size:11rem;padding:var(--sp-1);background:var(--surface);border:1px solid var(--line);border-radius:var(--r-2);box-shadow:0 12px 32px color-mix(in srgb,var(--seg-ink) 18%,transparent)}.site-lang__panel{inset-inline-end:0}.site-tools__panel{inset-inline-start:0;min-inline-size:12.5rem}.site-panel a{display:flex;align-items:center;justify-content:space-between;gap:var(--sp-4);min-block-size:2.75rem;padding-inline:var(--sp-3);border-radius:var(--r-1);color:var(--ink);text-decoration:none}.site-panel a:hover{background:var(--surface-2)}.site-panel a,.site-foot__langs a{direction:inherit}.site-panel a[aria-current=page],.site-panel a[aria-current=location]{color:var(--brand);font-weight:700}.site-panel a[aria-current=page]:after{content:"\2713";font-size:var(--fs-0)}.site-seg{display:inline-flex;gap:2px;padding:2px;flex:none;background:var(--bg);border:1px solid var(--line);border-radius:var(--r-round)}.site-seg button{min-block-size:2.75rem;padding-inline:var(--sp-4);border-radius:var(--r-round);color:var(--ink-2);font-size:var(--fs-0);font-weight:600;transition:background-color var(--t-fast) ease-out,color var(--t-fast) ease-out}.site-seg button:hover{color:var(--ink)}.site-seg button[aria-pressed=true]{background:var(--brand);color:var(--brand-ink)}.site-tools__panel .site-seg{display:flex;margin-block-start:var(--sp-1)}.site-tools__panel .site-seg button{flex:1 1 0;padding-inline:var(--sp-2)}.site-foot{content-visibility:auto;contain-intrinsic-size:auto 30rem;margin-block-start:var(--sp-7);background:var(--surface);border-block-start:1px solid var(--line);font-size:var(--fs-0);color:var(--ink-2)}.site-foot__grid{display:grid;gap:var(--sp-5);grid-template-columns:repeat(auto-fit,minmax(11rem,1fr));padding-block:var(--sp-6) var(--sp-5)}.site-foot__head{margin-block-end:var(--sp-2);font-size:var(--fs-0);font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-2)}.site-foot__col a{display:block;padding-block:var(--sp-1);color:var(--ink);font-weight:600;text-decoration:none}.site-foot__col a:hover{color:var(--brand);text-decoration:underline}.site-foot__col a[aria-current=page]{color:var(--brand)}.site-foot__base{display:flex;flex-wrap:wrap;align-items:center;gap:var(--sp-2) var(--sp-5);padding-block:var(--sp-4) var(--sp-6);border-block-start:1px solid var(--line)}@media print{:root,:root[data-theme=dark]{--bg: #FFFFFF;--surface: #FFFFFF;--surface-2: #FFFFFF;--ink: #000000;--ink-2: #333333;--line: #999999;--brand: #000000;--brand-ink: #FFFFFF;--brand-soft: #FFFFFF;--ok: #000000;--warn: #000000;--danger: #000000;--chevron-down: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4 6.2 8 10l4-3.8' fill='none' stroke='%23333333' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E")}.site-brand__mark path{fill:var(--ink)}.site-nav,.skip-link,button,[data-no-print]{display:none!important}body{background:#fff;color:#000}a{color:#000;text-decoration:underline}}