:root{color-scheme:light dark;--bg:#fcfcfd;--surface:#fff;--soft:#f1f4fa;--ink:#182338;--muted:#626e80;--line:#e2e7ef;--blue:#315ad6;--blue-soft:#e9efff;--red:#a43443;--red-bg:#ffebed;--green:#17633d;--green-bg:#e5f5eb;--shadow:0 26px 80px -30px #273c6b35;--radius:22px;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-synthesis:none}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:var(--header-offset,100px)}body{margin:0;background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}a:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--blue);outline-offset:5px;border-radius:4px}p,h1,h2,h3,figure,pre{margin:0}button,input,summary{font:inherit}img{display:block;max-width:100%}::selection{background:#bed0ff;color:#14213c}.container{width:min(1180px,calc(100% - 80px));margin-inline:auto}.skip-link{position:fixed;left:20px;top:-80px;z-index:20;padding:12px 20px;background:var(--ink);color:var(--surface)}.skip-link:focus{top:12px}.site-header{position:sticky;top:0;z-index:10;border-bottom:1px solid var(--line);background:var(--bg)}.header-inner{min-height:86px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:inline-flex;align-items:center;gap:10px;font-size:23px;font-weight:720;letter-spacing:-.7px}.brand img{border-radius:10px}.site-header nav{display:flex;align-items:center;gap:32px;font-size:14px;font-weight:560}.site-header nav a{padding:10px 0;color:var(--muted)}.site-header nav a:hover,.site-header nav a[aria-current=page]{color:var(--blue)}.hero{display:grid;grid-template-columns:1fr 1.12fr;gap:64px;align-items:center;padding-block:106px 88px}.eyebrow{font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--blue);display:flex;align-items:center;gap:8px}.status-dot{width:6px;height:6px;border-radius:50%;background:var(--blue)}h1{font-size:clamp(42px,4.6vw,65px);line-height:1.18;font-weight:720;letter-spacing:-.055em}.hero h1{margin-top:23px}.hero h1>span{color:var(--blue)}.hero-description{max-width:450px;margin-top:26px;font-size:17px;line-height:1.95;color:var(--muted)}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}.button{display:inline-flex;align-items:center;justify-content:center;gap:28px;min-height:48px;padding:12px 21px;border:1px solid transparent;border-radius:11px;font-size:14px;font-weight:600;transition:background .16s,border-color .16s}.button-primary{background:var(--blue);color:#fff}.button-primary:hover{background:#2449bc}.button-secondary{background:var(--surface);border-color:var(--line)}.button-secondary:hover{border-color:var(--blue)}.hero-notes{display:flex;flex-wrap:wrap;gap:18px;margin-top:25px;color:var(--muted);font-size:12px}.hero-notes span:before{content:"✓";color:var(--blue);margin-right:6px}.demo-figure{min-width:0;position:relative}.diff-demo{background:var(--surface);border:1px solid var(--line);border-radius:17px;box-shadow:var(--shadow);overflow:hidden;transform:rotate(-1deg)}.demo-title{display:flex;align-items:center;gap:10px;padding:19px 20px;border-bottom:1px solid var(--line);font-size:13px;font-weight:600}.document-mark{font:500 15px ui-monospace,SFMono-Regular,Menlo,monospace;color:var(--blue)}.readonly-badge{margin-left:auto;border:1px solid var(--line);border-radius:6px;padding:3px 7px;color:var(--muted);font-size:10px;font-weight:500}.demo-summary{display:flex;justify-content:space-between;gap:12px;padding:14px 19px;background:var(--soft);font-size:11px;color:var(--muted)}.demo-summary>span:last-child{display:flex;gap:8px;align-items:center}.added-count{color:var(--green)}.removed-count{color:var(--red)}.summary-label{font-size:10px}.diff-panels{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));padding-bottom:20px}.code-pane{min-width:0}.code-pane+.code-pane{border-left:1px solid var(--line)}.pane-heading{padding:16px 15px 14px;display:flex;align-items:center;gap:8px;font-size:11px;color:var(--muted)}.side-label{display:grid;place-items:center;width:19px;height:19px;background:var(--soft);border-radius:5px;font:600 10px ui-monospace,SFMono-Regular,Menlo,monospace;color:var(--ink)}.code-pane pre{overflow-x:auto;padding-bottom:8px;scrollbar-width:thin;font:11px/2.65 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}.code-pane code{display:block;min-width:max-content}.code-line{display:block;padding-right:15px;min-height:29px}.line-number{display:inline-block;width:29px;margin-right:8px;text-align:center;font-size:10px;color:var(--muted);opacity:.8;user-select:none}.change-sign{display:inline-block;width:7px;font-weight:700}.deleted{background:var(--red-bg);color:var(--red)}.added{background:var(--green-bg);color:var(--green)}.key{color:#3b5679}.string{color:#8b5a25}.demo-bottom{display:flex;justify-content:space-between;gap:12px;border-top:1px solid var(--line);padding:13px 18px;color:var(--muted);font-size:10px}.demo-figure figcaption{text-align:center;margin-top:22px;font-size:10px;color:var(--muted);line-height:1.8}.format-strip{border-block:1px solid var(--line);background:var(--surface)}.format-inner{min-height:84px;display:flex;align-items:center;justify-content:space-between;gap:30px}.format-inner>span{font-size:12px;white-space:nowrap;color:var(--muted)}.format-inner ul{list-style:none;margin:0;padding:0;display:flex;align-items:center;justify-content:flex-end;flex-wrap:wrap;gap:29px;font:500 13px ui-monospace,SFMono-Regular,Menlo,monospace;color:var(--ink)}.features-section{padding-block:100px 112px}.section-heading{position:relative}.section-heading h2,.trust-inner h2{font-size:clamp(31px,3.3vw,43px);line-height:1.4;letter-spacing:-.045em;font-weight:650;margin-top:16px}.section-heading>p:last-child{position:absolute;right:0;bottom:5px;font-size:15px;line-height:1.9;color:var(--muted)}.feature-columns{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:46px;margin-top:60px}.feature{border-top:1px solid var(--line);padding-top:24px}.feature-number{font:500 11px ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:.05em;color:var(--blue)}.feature h3{font-size:21px;line-height:1.5;margin-top:18px;font-weight:620;letter-spacing:-.025em}.feature>p{margin-top:15px;color:var(--muted);font-size:14px;line-height:1.95}.feature-details{padding:0;margin:23px 0 0;list-style:none;font-size:12px;line-height:2.3;color:var(--ink)}.feature-details li:before{content:"—";color:var(--blue);margin-right:8px}.type-list{display:flex;flex-wrap:wrap;gap:8px;margin-top:25px}.type-list span{font-size:11px;padding:6px 9px;border:1px solid var(--line);border-radius:6px;background:var(--surface)}.trust-section{background:#11253e;color:#f7faff;padding-block:76px 24px}.trust-inner{display:grid;grid-template-columns:1fr 1.2fr;gap:90px}.trust-section .eyebrow{color:#a0baff}.trust-inner h2{font-size:46px;margin-top:20px}.text-link{font-size:14px;font-weight:550;color:var(--blue);display:inline-flex;align-items:center;gap:13px}.text-link:hover{text-decoration:underline;text-underline-offset:5px}.light-link{color:#c3d2ff;margin-top:30px}.trust-points{display:grid;gap:28px}.trust-points article{display:flex;gap:24px;align-items:baseline}.trust-points article>span{font:500 11px ui-monospace,SFMono-Regular,Menlo,monospace;color:#8ba4ca}.trust-points h3{font-size:18px;font-weight:560;margin-bottom:8px}.trust-points p{font-size:13px;line-height:1.9;color:#b9c6d9;max-width:430px}.trust-note{border-top:1px solid #ffffff20;margin-top:54px;padding-top:20px;font-size:11px;line-height:1.9;color:#a0b0c7}.availability{padding-block:72px;display:flex;align-items:center;justify-content:space-between;gap:40px}.availability-brand{display:flex;align-items:center;gap:19px}.availability-brand img{border-radius:19px}.availability h2{font-size:27px;letter-spacing:-.7px}.availability-brand p{margin-top:8px;font-size:14px;color:var(--muted)}.availability-status{text-align:right}.release-label{font-size:12px;border:1px solid var(--line);border-radius:7px;background:var(--surface);padding:7px 10px;display:inline-block}.availability-status p{font-size:11px;line-height:1.9;color:var(--muted);margin-top:12px}.site-footer{border-top:1px solid var(--line)}.footer-inner{padding-block:35px;display:grid;grid-template-columns:1fr auto auto;align-items:center;gap:45px}.footer-brand{font-size:16px;font-weight:650;letter-spacing:-.4px}.footer-inner>div>p{margin-top:8px;color:var(--muted);font-size:11px}.footer-inner nav{display:flex;gap:25px;font-size:12px;color:var(--muted)}.footer-inner nav a:hover{color:var(--blue)}.copyright{font-size:11px;color:var(--muted)}
.document-intro{padding-block:75px 53px;border-bottom:1px solid var(--line)}.document-intro h1{font-size:47px;letter-spacing:-.045em;margin-top:18px;line-height:1.3}.document-intro>p:last-child{color:var(--muted);font-size:15px;line-height:1.9;max-width:640px;margin-top:20px}.policy-layout{display:grid;grid-template-columns:180px minmax(0,760px);gap:90px;justify-content:space-between;padding-block:50px 24px}.policy-toc{align-self:start;position:sticky;top:calc(var(--header-offset,100px) + 16px)}.policy-toc>p{font-size:11px;letter-spacing:.08em;color:var(--muted);margin-bottom:17px}.policy-toc a{display:block;font-size:13px;line-height:1.8;padding:8px 0;color:var(--muted)}.policy-toc a:hover{color:var(--blue)}.policy-content{min-width:0;font-size:15px;line-height:2.05;overflow-wrap:anywhere}.policy-content p{margin-bottom:20px}.policy-content h2{font-size:23px;letter-spacing:-.03em;line-height:1.5;margin:39px 0 17px;padding-top:10px;border-top:1px solid var(--line)}.policy-content h3{font-size:19px;margin:24px 0 12px}.policy-content a{color:var(--blue);text-decoration:underline;text-underline-offset:4px}.policy-content code{font-size:.9em;background:var(--soft);border-radius:4px;padding:2px 4px}.table-scroll{overflow-x:auto;margin:26px 0}.policy-content table{width:100%;border-collapse:collapse;min-width:420px;font-size:13px;line-height:1.9;text-align:left}.policy-content td,.policy-content th{padding:13px 15px;border-bottom:1px solid var(--line);vertical-align:top}.policy-content th{background:var(--soft);font-weight:600}.policy-content td:first-child{width:38%;font-weight:500}.policy-end{border-top:1px solid var(--line);padding-block:30px 60px}.policy-end>p{font-size:12px;line-height:1.9;color:var(--muted);max-width:760px}.policy-end>a{margin-top:16px}.support-layout{padding-block:54px 90px;display:grid;grid-template-columns:330px minmax(0,1fr);gap:90px}.contact-panel{align-self:start;border:1px solid var(--line);border-radius:var(--radius);padding:29px;background:var(--surface)}.contact-icon{display:grid;place-items:center;width:38px;height:38px;border-radius:10px;background:var(--blue-soft);color:var(--blue);font-size:23px;margin-bottom:24px}.contact-panel h2{font-size:23px;font-weight:620;margin-bottom:20px}.contact-field-label{font-size:11px;color:var(--muted);margin-bottom:9px}.contact-unavailable{font-size:19px;font-weight:550}.contact-email{display:inline-block;font-size:15px;color:var(--blue);overflow-wrap:anywhere;text-decoration:underline;text-underline-offset:5px}.contact-message{margin-top:12px;font-size:12px;line-height:1.9;color:var(--muted)}.contact-note{font-size:11px;line-height:1.9;color:var(--muted);margin-top:17px}.feedback-guide{margin-top:28px;border-top:1px solid var(--line);padding-top:23px}.feedback-guide h3{font-size:13px;font-weight:600}.feedback-guide ol{padding-left:20px;font-size:12px;line-height:2.2;color:var(--muted);margin:12px 0}.feedback-guide>p{font-size:11px;line-height:1.9;color:var(--muted)}.faq-heading{margin-bottom:26px}.faq h2{font-size:29px;letter-spacing:-.04em;font-weight:650;margin-top:10px}.faq details{border-top:1px solid var(--line)}.faq details:last-child{border-bottom:1px solid var(--line)}.faq summary{min-height:70px;list-style:none;display:flex;align-items:center;justify-content:space-between;gap:22px;padding-block:20px;cursor:pointer;font-size:15px;font-weight:550;line-height:1.7}.faq summary::-webkit-details-marker{display:none}.faq summary>span{color:var(--blue);font-size:22px;font-weight:400;flex-shrink:0;transition:transform .15s}.faq details[open] summary>span{transform:rotate(45deg)}.faq details>div{font-size:14px;line-height:1.95;color:var(--muted);padding:0 30px 23px 0}.not-found{min-height:60vh;padding-block:100px}.not-found h1{margin:20px 0;font-size:42px}.not-found>p:not(.eyebrow){font-size:16px;line-height:1.9;color:var(--muted);margin-bottom:25px}
:root[data-theme="light"]{color-scheme:light}
:root[data-theme="dark"]{color-scheme:dark;--bg:#101724;--surface:#172132;--soft:#1d2a40;--ink:#ecf0f9;--muted:#a6b3c9;--line:#2a3950;--blue:#91b0ff;--blue-soft:#253b60;--red:#ffc0c8;--red-bg:#3f2632;--green:#b0e9c5;--green-bg:#203d32;--shadow:0 26px 80px -25px #0009}:root[data-theme="dark"] .button-primary{background:#3765dc;color:white}:root[data-theme="dark"] .button-primary:hover{background:#4475f0}:root[data-theme="dark"] .key{color:#b3c9ed}:root[data-theme="dark"] .string{color:#e9c48e}:root[data-theme="dark"] .trust-section{background:#0b1422}:root[data-theme="dark"] .release-label{color:var(--ink)}:root[data-theme="dark"] .diff-demo{box-shadow:0 20px 90px -40px #000}:root[data-theme="dark"] .brand img,:root[data-theme="dark"] .availability-brand img{box-shadow:0 0 0 1px #ffffff12}
@media(prefers-color-scheme:dark){:root:not([data-theme]){color-scheme:dark;--bg:#101724;--surface:#172132;--soft:#1d2a40;--ink:#ecf0f9;--muted:#a6b3c9;--line:#2a3950;--blue:#91b0ff;--blue-soft:#253b60;--red:#ffc0c8;--red-bg:#3f2632;--green:#b0e9c5;--green-bg:#203d32;--shadow:0 26px 80px -25px #0009}:root:not([data-theme]) .button-primary{background:#3765dc;color:white}:root:not([data-theme]) .button-primary:hover{background:#4475f0}:root:not([data-theme]) .key{color:#b3c9ed}:root:not([data-theme]) .string{color:#e9c48e}:root:not([data-theme]) .trust-section{background:#0b1422}:root:not([data-theme]) .release-label{color:var(--ink)}:root:not([data-theme]) .diff-demo{box-shadow:0 20px 90px -40px #000}:root:not([data-theme]) .brand img,:root:not([data-theme]) .availability-brand img{box-shadow:0 0 0 1px #ffffff12}}

@media(min-width:1500px){.hero{padding-block:125px 110px}.hero h1{font-size:68px}.code-pane pre{font-size:12px}}
@media(max-width:1000px){.container{width:calc(100% - 56px)}.hero{gap:32px;padding-block:72px 65px}.hero h1{font-size:48px}.hero-description{font-size:15px}.code-pane pre{font-size:10px}.demo-title{padding-inline:15px}.demo-summary{padding-inline:12px}.line-number{width:20px;margin-right:4px}.demo-bottom{font-size:9px;padding-inline:12px}.format-inner ul{gap:19px}.feature-columns{gap:27px}.feature h3{font-size:19px}.trust-inner{gap:48px}.trust-inner h2{font-size:40px}.policy-layout{gap:45px;grid-template-columns:150px minmax(0,1fr)}.support-layout{gap:42px;grid-template-columns:285px minmax(0,1fr)}.contact-panel{padding:23px}.section-heading>p:last-child{font-size:13px}}
@media(max-width:740px){.container{width:calc(100% - 40px)}.header-inner{min-height:74px;gap:12px}.brand{font-size:21px;gap:7px}.brand img{width:34px;height:34px}.site-header nav{gap:18px;font-size:12px}.hero{grid-template-columns:1fr;gap:47px;padding-block:51px 47px}.hero h1{font-size:53px;line-height:1.19;margin-top:20px}.hero-description{font-size:16px;max-width:520px;margin-top:23px}.hero-notes{margin-top:20px;gap:17px}.hero-actions{margin-top:25px}.diff-demo{transform:none}.demo-title{font-size:13px;padding:16px}.demo-summary{padding:13px 15px}.code-pane pre{font-size:11px}.line-number{width:23px;margin-right:5px}.demo-figure figcaption{margin-top:14px;font-size:10px}.format-inner{align-items:flex-start;flex-direction:column;gap:16px;padding-block:22px}.format-inner ul{justify-content:flex-start;gap:15px 23px;font-size:12px}.features-section{padding-block:56px 58px}.section-heading h2{font-size:33px}.section-heading>p:last-child{position:static;margin-top:19px;font-size:14px}.feature-columns{grid-template-columns:1fr;gap:32px;margin-top:35px}.feature h3{font-size:22px;margin-top:13px}.feature>p{font-size:14px;margin-top:10px;max-width:540px}.feature-details{margin-top:13px}.type-list{margin-top:16px}.trust-section{padding-top:48px}.trust-inner{grid-template-columns:1fr;gap:36px}.trust-inner h2{font-size:38px}.light-link{margin-top:20px}.trust-points{gap:24px}.trust-points article{gap:17px}.trust-note{margin-top:32px;font-size:10px}.availability{padding-block:43px;align-items:flex-start;flex-direction:column;gap:26px}.availability-status{text-align:left}.availability-brand img{width:61px;height:61px}.availability h2{font-size:24px}.availability-brand p{font-size:13px}.footer-inner{grid-template-columns:1fr auto;gap:26px 15px;padding-block:29px}.footer-inner nav{gap:16px;font-size:11px}.copyright{grid-column:1/-1}.document-intro{padding-block:45px 32px}.document-intro h1{font-size:40px;margin-top:16px}.document-intro>p:last-child{font-size:14px;margin-top:17px}.policy-layout{display:block;padding-top:25px}.policy-toc{position:static;border-bottom:1px solid var(--line);padding-bottom:18px;margin-bottom:25px}.policy-toc>p{margin-bottom:9px}.policy-toc a{display:inline-block;padding:6px 16px 6px 0;font-size:12px}.policy-content{font-size:14px;line-height:2}.policy-content h2{font-size:22px}.policy-content table{font-size:12px}.policy-content td,.policy-content th{padding:10px 12px}.policy-end{padding-bottom:40px}.support-layout{grid-template-columns:1fr;gap:40px;padding-block:30px 54px}.contact-panel{padding:25px}.contact-icon{margin-bottom:18px}.feedback-guide{margin-top:20px;padding-top:20px}.faq h2{font-size:27px}.faq summary{font-size:14px;min-height:67px}.faq details>div{font-size:13px;padding-right:15px}.not-found{padding-block:70px}}
@media(max-width:380px){.container{width:calc(100% - 32px)}.site-header nav{gap:12px;font-size:11px}.brand{font-size:19px}.brand img{width:30px;height:30px}.hero h1{font-size:46px}.hero-actions{gap:9px}.button{padding-inline:16px;font-size:13px;gap:15px}.hero-notes{gap:13px;font-size:11px}.code-pane pre{font-size:9px}.line-number{width:18px;margin-right:3px}.pane-heading{font-size:10px;padding-inline:10px}.demo-bottom{font-size:9px}.footer-inner{grid-template-columns:1fr}.footer-inner nav{gap:25px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important}}

[hidden]{display:none!important}.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}.brand-art{display:inline-flex;flex-shrink:0}.brand-dark{display:none}:root[data-theme="dark"] .brand-light{display:none}:root[data-theme="dark"] .brand-dark{display:block}.noscript-locales{display:flex;flex-wrap:wrap;gap:18px;justify-content:center;padding:15px;font-size:13px;border-bottom:1px solid var(--line)}
.footer-inner{gap:24px 32px}.footer-inner .copyright{grid-column:1/-1}.preferences{display:flex;align-items:center;gap:15px}.footer-preferences{justify-self:end}.control-icon{width:18px;height:18px;flex-shrink:0}.language-picker{position:relative;font-size:12px;color:var(--muted)}.language-picker summary{display:flex;align-items:center;gap:8px;min-height:44px;padding:7px 3px;cursor:pointer;list-style:none;white-space:nowrap}.language-picker summary::-webkit-details-marker{display:none}.language-picker summary>.control-icon:last-child{width:13px;height:13px;transition:transform .15s}.language-picker[open] summary>.control-icon:last-child{transform:rotate(180deg)}.language-picker summary:hover{color:var(--ink)}.language-options{position:absolute;bottom:calc(100% + 9px);right:0;z-index:30;min-width:208px;padding:7px;background:var(--surface);border:1px solid var(--line);border-radius:12px;box-shadow:0 10px 34px #0002}.language-option{width:100%;min-height:40px;display:flex;align-items:center;justify-content:space-between;gap:20px;border:0;border-radius:7px;padding:9px 12px;text-align:left;font:inherit;color:var(--ink);background:transparent;cursor:pointer}.language-option:hover{background:var(--soft)}.language-option[aria-pressed="true"]{color:var(--blue);background:var(--blue-soft)}.language-option[aria-pressed="true"]::after{content:"✓";font-size:12px}.theme-switch{display:flex;gap:2px;padding:3px;border:1px solid var(--line);border-radius:24px;background:var(--soft)}.theme-choice{display:grid;place-items:center;width:38px;height:36px;padding:0;border:0;border-radius:20px;background:transparent;color:var(--muted);cursor:pointer}.theme-choice:hover{color:var(--ink)}.theme-choice[aria-pressed="true"]{background:var(--surface);color:var(--blue);box-shadow:0 1px 4px #0001}.theme-choice .control-icon{width:17px;height:17px}.preferences button:focus-visible{outline:3px solid var(--blue);outline-offset:2px}
@media(prefers-color-scheme:dark){:root:not([data-theme]) .brand-light{display:none}:root:not([data-theme]) .brand-dark{display:block}}
@media(max-width:740px){.footer-inner{grid-template-columns:1fr;gap:20px}.footer-preferences{grid-column:1/-1;justify-self:stretch;border-top:1px solid var(--line);padding-top:16px}.preferences{justify-content:space-between}.language-options{left:0;right:auto}body:lang(ja) .document-intro h1,body:lang(ko) .document-intro h1{font-size:clamp(27px,8.5vw,40px)}body:lang(en) .hero h1,body:lang(ja) .hero h1,body:lang(ko) .hero h1{font-size:clamp(34px,10vw,46px)}}
@media(max-width:380px){.site-header nav{gap:10px}.footer-inner nav{gap:25px}}

.preferences-error{margin-top:10px;color:var(--red);font-size:12px;line-height:1.8;max-width:300px}