@charset "UTF-8";
:root{color-scheme:dark;--bg:#0c1118;--panel:#141d29;--text:#edf2fa;--muted:#9baabd;--line:#273343;--accent:#87e5ed;--rail:256px;--header:80px;font-family:Inter,"Segoe UI","Microsoft YaHei","PingFang SC",sans-serif;font-synthesis:none}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:152px}body{margin:0;background:var(--bg);color:var(--text);font-size:15px;line-height:1.8}a{color:inherit;text-decoration:none}button{font:inherit}a,button,summary{-webkit-tap-highlight-color:transparent}button,a,summary{touch-action:manipulation}:focus-visible{outline:2px solid var(--accent);outline-offset:5px}::selection{background:#7cdee9;color:#0c1118}
.skip-link{position:fixed;top:-80px;left:20px;z-index:100;background:var(--accent);color:#081319;padding:10px 18px}.skip-link:focus{top:10px}.event-header{height:var(--header);border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 clamp(24px,4vw,72px);background:rgba(12,17,24,.96);position:sticky;top:0;z-index:30;backdrop-filter:blur(16px)}.event-brand{font-size:25px;font-weight:800;letter-spacing:-1px;white-space:nowrap}.event-brand span{font-size:16px;letter-spacing:0;margin-left:8px}.event-header nav{display:flex;gap:32px;color:var(--muted);font-size:14px}.event-header a:hover,.text-link:hover{color:var(--accent)}
.track-layout{display:grid;grid-template-columns:var(--rail) minmax(0,1fr);gap:clamp(32px,4vw,72px);max-width:1480px;margin:0 auto;padding:0 40px}.track-rail{position:sticky;top:var(--header);height:calc(100dvh - var(--header));padding:30px 24px 24px 0;border-right:1px solid var(--line);display:flex;flex-direction:column;overflow:auto}.back-link{font-size:13px;color:var(--muted);display:inline-block;margin-bottom:32px}.back-link:hover{color:var(--accent)}.rail-title{font-size:12px;letter-spacing:2px;color:#c0cddd;display:flex;align-items:center;justify-content:space-between;margin:0 10px 18px}.rail-title span{border:1px solid var(--line);font-size:10px;letter-spacing:0;padding:0 6px;border-radius:4px;color:var(--muted)}#track-links{display:flex;flex-direction:column;gap:6px}#track-links a{display:grid;grid-template-columns:22px 1fr;gap:9px;align-items:start;padding:14px 11px;border:1px solid transparent;border-radius:8px;font-size:13px;color:var(--muted);line-height:1.65}#track-links a:hover{background:#151f2c;color:#fff}#track-links a[aria-current]{background:#172a34;border-color:#32515e;color:var(--accent)}.track-number{font-size:11px;font-family:Consolas,monospace;opacity:.7;padding-top:2px}.rail-bottom{margin-top:auto;padding:42px 10px 0;font-size:16px;letter-spacing:1px;font-weight:700;color:#728097;line-height:1.5}.rail-bottom span{font-size:10px;font-weight:400;letter-spacing:3px}
#track-article{min-width:0;padding-bottom:48px}.track-hero{padding:38px 0 0;position:relative}.hero-top{display:flex;justify-content:space-between;gap:20px;align-items:start}.eyebrow{font-size:11px;letter-spacing:1px;color:var(--muted);margin:0}.eyebrow span{padding:0 9px;color:#526479}.version{font-family:Consolas,monospace;font-size:10px;border:1px solid var(--line);border-radius:4px;color:var(--muted);padding:1px 6px;white-space:nowrap}.category{font-size:12px;color:var(--accent);margin:34px 0 10px}h1{font-size:clamp(28px,3vw,42px);font-weight:750;letter-spacing:-1px;line-height:1.3;margin:0 0 18px}h2{font-size:25px;line-height:1.35;letter-spacing:-.5px;margin:4px 0 0}h3{font-size:17px;margin:30px 0 12px;line-height:1.5}p{color:#b5c2d3;margin:0 0 18px;overflow-wrap:anywhere}.hero-description{font-size:16px;max-width:760px;margin-bottom:27px;line-height:1.8}.hero-actions{display:flex;gap:12px;margin-bottom:32px}.button{display:inline-flex;align-items:center;justify-content:center;gap:32px;min-height:46px;padding:10px 22px;border-radius:7px;font-size:14px;font-weight:650;transition:background .15s,transform .15s;border:1px solid transparent;white-space:nowrap}.primary{background:var(--accent);color:#092029}.primary:hover{background:#abf3f7;transform:translateY(-1px)}.secondary{border-color:#384657;background:#17212e}.secondary:hover{border-color:var(--accent);background:#1e2c3b}.hero-facts{display:grid;grid-template-columns:1.2fr 1.1fr 1fr;border-top:1px solid var(--line);padding:24px 0;margin:0;gap:24px}.hero-facts dt{font-size:11px;color:#7e90a8;margin-bottom:3px}.hero-facts dd{margin:0;font-size:14px;font-weight:600;color:#d5e0ee}.section-nav{display:flex;gap:30px;position:sticky;top:var(--header);z-index:20;border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:rgba(12,17,24,.97);backdrop-filter:blur(12px);overflow-x:auto;scrollbar-width:none}.section-nav::-webkit-scrollbar{display:none}.section-nav a{font-size:13px;white-space:nowrap;line-height:1.5;padding:19px 0 17px;border-bottom:2px solid transparent;color:var(--muted)}.section-nav [aria-current]{border-color:var(--accent);color:var(--accent)}.section-nav a:hover{color:#fff}
.content-section{padding:40px 0;border-bottom:1px solid var(--line);scroll-margin-top:152px}.section-heading{margin-bottom:24px}.section-heading>span{font-size:9px;letter-spacing:2.2px;color:#71839b;font-family:Consolas,monospace}.content-section>p,.prose p{font-size:14px;line-height:1.95}.prose{max-width:900px}.detail-list{list-style:none;padding:0;margin:0;display:grid;gap:11px;font-size:14px;color:#b5c2d3}.detail-list li{padding-left:20px;position:relative}.detail-list li:before{content:"";position:absolute;left:2px;top:12px;width:5px;height:5px;background:#6c9cae;border-radius:50%}.table-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:8px;margin:20px 0 24px}table{width:100%;border-collapse:collapse;text-align:left;line-height:1.75;font-size:13px}th,td{padding:15px 17px;vertical-align:top;border-bottom:1px solid var(--line);overflow-wrap:anywhere}thead th{background:#17212e;color:#91a2ba;font-size:11px;font-weight:500;white-space:nowrap}tbody th{font-weight:500;color:#d6e0ee;min-width:145px}tbody td{color:#9eafc5}tbody tr:last-child>*{border-bottom:0}tbody tr:hover{background:#111b27}.download-list{display:grid;grid-template-columns:1fr 1fr;gap:10px}.download-item{display:flex;align-items:center;gap:14px;padding:18px;background:#131d29;border:1px solid var(--line);border-radius:8px;min-width:0;transition:border-color .15s}.download-item:hover{border-color:#57808f;background:#192633}.download-item strong{display:block;font-size:13px;font-weight:600;line-height:1.6}.download-item small{display:block;color:#7f92aa;font-size:11px;line-height:1.7;margin-top:3px}.formula{margin:24px 0 16px;padding:22px 24px;border:1px solid #314a57;border-left:3px solid var(--accent);border-radius:0 7px 7px 0;background:#14242d;color:#bfedf0;font:13px/2 Consolas,"Microsoft YaHei",monospace;white-space:pre-wrap;overflow-wrap:anywhere}.example-note{font-size:12px!important;color:#8598b0!important;line-height:1.9!important}.baseline{display:grid;grid-template-columns:1fr auto;gap:24px;background:#141e2b;border:1px solid var(--line);border-radius:8px;padding:24px;margin-top:28px;align-items:center}.baseline h3{margin:4px 0 8px;font-size:15px}.baseline p{font-size:11px;color:#8598b0;margin:0}.baseline dl{margin:0;display:flex;gap:24px;flex-wrap:wrap;justify-content:flex-end}.baseline dt{font-size:10px;color:var(--muted);font-family:Consolas,monospace}.baseline dd{font-size:21px;font-weight:650;color:var(--accent);margin:2px 0 0;font-family:Consolas,monospace}.endpoint-line{display:flex;align-items:center;gap:12px;padding:13px 16px;border:1px solid var(--line);border-radius:7px;font-size:12px;flex-wrap:wrap}.endpoint-line>span{font-size:10px;font-weight:700;color:var(--accent);background:#1e3b43;padding:2px 7px;border-radius:3px}.endpoint-line small{margin-left:auto;color:#768ba5;font-size:10px}.content-section code{color:#a9dbe5;font-size:.94em}code{font-family:Consolas,"Cascadia Code",monospace}.example-grid{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);gap:16px;align-items:start}.code-panel{min-width:0;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:#080e16}.code-top{display:flex;justify-content:space-between;align-items:center;background:#151f2c;padding:10px 16px;font-size:12px;color:#afbed2;border-bottom:1px solid var(--line)}.code-top small{font:9px Consolas,monospace;color:#607890;margin-left:8px}.code-top button{border:0;border-radius:4px;background:transparent;color:#8faac2;font-size:11px;padding:3px 8px;cursor:pointer}.code-top button:hover{background:#273848;color:#fff}.code-panel pre{font:12px/1.8 Consolas,"Microsoft YaHei",monospace;margin:0;padding:20px;overflow:auto;max-height:380px;tab-size:2;scrollbar-color:#324960 #0c1520}.protocol-list{display:grid;grid-template-columns:1fr 1fr;list-style:none;padding:0;margin:0;gap:20px 28px}.protocol-list li{display:flex;flex-direction:column;gap:4px;font-size:12px;color:#8da1ba}.protocol-list strong{color:#c9d7e6;font-weight:500}.start-intro{display:flex;justify-content:space-between;gap:15px;align-items:center}.start-intro h3{margin:0 0 12px}.text-link{font-size:12px;color:var(--accent);white-space:nowrap}.checklist{padding-left:22px;color:#b0bfd3;font-size:14px;display:grid;gap:10px}.checklist li{padding-left:6px}.checklist li::marker{color:var(--accent);font-size:12px}.submit-callout{border:1px solid #304b5b;background:linear-gradient(110deg,#182c37,#14202e);border-radius:9px;padding:28px;margin-top:30px;display:flex;justify-content:space-between;align-items:center;gap:24px}.submit-callout h3{margin:0 0 5px;font-size:19px}.submit-callout p{margin:0;color:#8ca9bb;font-size:12px}.faq-section{padding-bottom:24px}.faq{border-top:1px solid var(--line);font-size:14px}.faq:first-of-type{border-top:0}.faq summary{cursor:pointer;list-style:none;padding:18px 28px 18px 0;position:relative}.faq summary::-webkit-details-marker{display:none}.faq summary:after{content:'+';position:absolute;right:5px;color:#7293aa}.faq[open] summary:after{content:'−'}.faq p{font-size:13px;line-height:1.9;max-width:820px}.source-note{padding:24px 0;color:#6e8199;font-size:11px;display:flex;flex-wrap:wrap;gap:0 16px;line-height:1.8}.source-note p{margin:0;color:#8ca1bb;font-size:11px}.source-note a{color:#9db7c8}.source-note a:hover{color:var(--accent)}.source-note span{width:100%;margin-top:6px}.event-footer{border-top:1px solid var(--line);padding:24px clamp(24px,4vw,72px);display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;font-size:10px;color:#63758c}.event-footer a:hover{color:var(--accent)}#copy-status{position:fixed;bottom:24px;left:50%;transform:translate(-50%,12px);opacity:0;pointer-events:none;background:#e2f8f6;color:#112932;padding:10px 24px;font-size:13px;border-radius:7px;z-index:50;transition:opacity .15s,transform .15s}#copy-status.visible{opacity:1;transform:translate(-50%,0)}
@media(min-width:1700px){:root{--rail:280px}.track-layout{max-width:1550px;gap:70px}#track-links a{font-size:14px;padding:16px 12px}.track-hero{padding-top:44px}.category{margin-top:40px}}
@media(max-width:1100px){:root{--rail:215px}.track-layout{padding:0 24px;gap:28px}.track-rail{padding-right:16px}#track-links a{font-size:12px;padding:12px 8px;gap:6px}.section-nav{gap:24px}.download-list{grid-template-columns:1fr}.hero-facts{gap:15px}.hero-facts dd{font-size:12px}.baseline{grid-template-columns:1fr}.baseline dl{justify-content:flex-start}.event-header nav{gap:20px}.event-brand{font-size:23px}.event-brand span{font-size:13px}}
@media(max-width:760px){:root{--header:65px}.event-header{padding:0 20px}.event-brand{font-size:23px}.event-brand span{display:none}.event-header nav{font-size:12px;gap:18px}.track-layout{display:block;padding:0 20px}.track-rail{position:relative;top:0;height:auto;padding:20px 0 0;border-right:0;overflow:visible}.back-link{display:none}.rail-title{font-size:10px;margin:0 0 10px}.rail-title span{display:none}#track-links{display:flex;flex-direction:row;gap:7px;overflow-x:auto;padding-bottom:12px;scrollbar-width:thin;scrollbar-color:#294154 transparent}#track-links a{display:flex;align-items:center;flex:none;white-space:nowrap;padding:8px 12px;font-size:11px;background:#101a26;border-color:var(--line);gap:7px}#track-links .track-number{padding:0;font-size:10px}.rail-bottom{display:none}.track-hero{padding-top:18px}.hero-top>.eyebrow{font-size:9px;letter-spacing:0}.hero-top .eyebrow span{padding:0 4px}.category{font-size:11px;margin-top:24px}h1{font-size:30px;letter-spacing:-.5px;max-width:540px}.hero-description{font-size:14px}.hero-actions{margin-bottom:26px}.button{font-size:12px;padding:10px 17px;gap:20px;min-height:44px}.hero-facts{grid-template-columns:1fr 1fr;gap:14px;padding:18px 0}.hero-facts>div:last-child{grid-column:1/-1;display:flex;gap:12px;align-items:center}.hero-facts dt{font-size:10px;margin:0}.hero-facts dd{font-size:12px}.section-nav{gap:24px;margin:0 -20px;padding:0 20px}.section-nav a{font-size:12px;padding-top:16px;padding-bottom:14px}.content-section{padding:30px 0;scroll-margin-top:130px}.section-heading{margin-bottom:20px}h2{font-size:23px}h3{font-size:16px}.content-section>p,.prose p,.detail-list,.checklist{font-size:13px}.table-scroll{margin:18px 0}table{font-size:12px;min-width:550px}th,td{padding:12px 14px}.example-grid{grid-template-columns:1fr}.code-panel pre{max-height:300px;font-size:11px;padding:16px}.formula{font-size:11px;padding:16px}.baseline{padding:20px}.baseline dl{gap:20px}.baseline dd{font-size:20px}.protocol-list{grid-template-columns:1fr;gap:16px}.submit-callout{padding:22px;flex-direction:column;align-items:stretch;gap:18px}.submit-callout .button{align-self:flex-start}.event-footer{padding:22px 20px;font-size:9px}.event-footer>span:nth-child(2){order:3;flex-basis:100%}.source-note{font-size:10px}.endpoint-line{font-size:11px}.endpoint-line small{margin-left:0;flex-basis:100%}.hero-top .version{font-size:9px}.download-item{padding:15px}.faq{font-size:13px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important}}