:root{color-scheme:light;--ink:#18253f;--muted:#627087;--blue:#2456dd;--line:#dce3ef;--surface:#fff;--canvas:#f5f7fb;--radius:18px;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--canvas);font-synthesis:none}
*{box-sizing:border-box}body{margin:0;font-size:16px;line-height:1.6}a{color:inherit;text-decoration:none}button,input{font:inherit}button,a,input,summary{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #88a6ff;outline-offset:4px}[hidden]{display:none!important}.site-header{max-width:1248px;margin:auto;min-height:96px;padding:24px 40px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:12px;font-size:18px;font-weight:650}.brand>span{display:flex;gap:12px;align-items:center}.brand-divider{color:#c0cadc;font-weight:400}.brand-sub{font-weight:450;color:var(--muted);font-size:16px}.course-link{font-size:14px;color:var(--muted);white-space:nowrap}.course-link:hover,.text-button:hover{color:var(--blue)}main{max-width:1248px;margin:auto;padding:36px 40px 0}.intro{display:flex;align-items:flex-end;justify-content:space-between;gap:30px;margin-bottom:34px}.eyebrow{font-size:14px;font-weight:650;color:var(--blue);margin:0 0 9px;letter-spacing:.06em}h1{font-size:clamp(28px,3.1vw,40px);line-height:1.35;letter-spacing:-.04em;margin:0 0 15px;font-weight:700}.mobile-break{display:none}.intro-copy{margin:0;color:var(--muted);max-width:650px}.channel-control{display:flex;padding:5px;border:1px solid var(--line);background:#eaf0f8;border-radius:12px;flex-shrink:0;gap:3px}.channel{border:0;background:transparent;color:var(--muted);padding:9px 17px;border-radius:8px;font-size:14px;font-weight:650;white-space:nowrap}.channel.active{background:white;color:var(--blue);box-shadow:0 2px 7px #14294a12}.channel-note{display:flex;align-items:center;gap:12px;padding:14px 18px;background:#eaf0ff;border:1px solid #dce5ff;border-radius:12px;margin-bottom:24px;font-size:14px}.channel-note>span{font-weight:650;white-space:nowrap;color:var(--blue)}.channel-note p{margin:0;color:#4b618b}.channel-note.test{background:#fff7e7;border-color:#f5e3b9}.channel-note.test>span{color:#925d09}.channel-note.test p{color:#80683f}.text-button{border:0;background:none;color:var(--muted);padding:0;font-size:14px;white-space:nowrap;margin-left:auto}.platform-grid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:18px}.platform-card{grid-column:span 2;background:white;border:1px solid var(--line);border-radius:var(--radius);padding:26px;display:flex;flex-direction:column;min-width:0}.platform-card:nth-child(n+4){grid-column:span 3}.card-top{display:flex;align-items:center;gap:15px;margin-bottom:20px}.platform-icon{display:flex;align-items:center;justify-content:center;background:#f0f4fb;border-radius:13px;width:50px;height:50px;flex-shrink:0;color:var(--blue)}.platform-icon svg{width:28px;height:28px}.card-top h2{font-size:21px;line-height:1.3;margin:0 0 4px;letter-spacing:-.02em}.card-top p{font-size:14px;color:var(--muted);margin:0}.release-version{font-size:18px;font-weight:650;margin:0 0 8px;overflow-wrap:anywhere}.release-meta{display:flex;flex-wrap:wrap;gap:4px 14px;color:var(--muted);font-size:14px;margin:0 0 12px}.release-notes{font-size:14px;color:var(--muted);margin:0 0 18px;padding-left:20px}.release-notes li+li{margin-top:5px}.empty-note{margin:0 0 20px;color:var(--muted);font-size:14px}.empty-title{margin:0 0 6px;font-size:17px;font-weight:600;color:#69758a}.card-actions{margin-top:auto;padding-top:6px}.button{border:1px solid transparent;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:10px 20px;font-size:15px;font-weight:600;text-align:center}.platform-card .button{width:100%}.primary{color:white;background:var(--blue)}.primary:hover{background:#1946c3}.secondary{border-color:var(--line);background:white;color:var(--ink)}.unavailable{color:#8390a5;background:#f0f3f8;border:1px solid #e8edf5}.artifact-details{font-size:14px;margin-top:15px;color:var(--muted)}summary{cursor:pointer;list-style-position:inside}.artifact-details dl{margin:12px 0 0;display:grid;grid-template-columns:70px minmax(0,1fr);gap:8px 12px}.artifact-details dt{color:var(--muted)}.artifact-details dd{margin:0;overflow-wrap:anywhere;font-size:13px}.artifact-details code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace}.history-section{margin-top:28px;font-size:15px}.history-section>details>summary{font-weight:600}.history-row{padding:18px 0;border-bottom:1px solid var(--line);display:flex;gap:15px;justify-content:space-between;align-items:flex-start;overflow-wrap:anywhere}.history-row p{margin:0}.history-row small{font-size:14px;color:var(--muted)}.history-row a{color:var(--blue);white-space:nowrap}.muted{color:var(--muted);font-size:14px}.install-help{margin:54px 0 0;padding:32px 0 40px;border-top:1px solid var(--line);display:grid;grid-template-columns:220px 1fr;gap:32px}.install-help h2{font-size:22px;margin:0}.help-items{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:26px}.step{font-size:13px;color:var(--blue);font-weight:700}.help-items h3{font-size:15px;margin:7px 0}.help-items p{font-size:14px;margin:0;color:var(--muted)}footer{border-top:1px solid var(--line);max-width:1168px;margin:auto;padding:23px 0;display:flex;justify-content:space-between;gap:16px;font-size:13px;color:var(--muted)}.access-panel{max-width:540px;background:white;border:1px solid var(--line);border-radius:var(--radius);margin:36px auto;padding:32px}.access-icon{font-size:28px;color:var(--blue)}.access-panel h2{margin:5px 0 8px;font-size:23px}.access-panel>p{margin:0 0 24px;color:var(--muted);font-size:15px}.access-panel label{display:block;font-size:14px;margin-bottom:8px}.password-row{display:flex;gap:10px}.password-row input{border:1px solid #c8d3e5;border-radius:10px;width:100%;min-width:0;padding:10px 12px}.password-row button{flex-shrink:0}.form-message{color:#b33c32;font-size:14px;margin:10px 0 0;min-height:22px}.load-message{color:var(--muted);padding:15px 0}.button[aria-busy=true]{opacity:.7}
@media(max-width:1000px){.intro{align-items:flex-start;flex-direction:column;gap:24px}.platform-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.platform-card,.platform-card:nth-child(n+4){grid-column:span 1}.platform-card:last-child{grid-column:span 2}.install-help{grid-template-columns:1fr;gap:24px}footer{margin:0 40px}}
@media(max-width:600px){.site-header{padding:20px;min-height:78px;gap:12px}.brand{font-size:17px;gap:9px}.brand-divider,.brand-sub{display:none!important}.course-link{font-size:13px}main{padding:22px 20px 0}h1{font-size:30px}.mobile-break{display:block}.intro{margin-bottom:24px}.intro-copy{font-size:15px}.channel-control{width:100%}.channel{flex:1;padding:10px}.channel-note{align-items:flex-start;flex-wrap:wrap;padding:14px}.channel-note p{flex-basis:100%;order:2}.platform-grid{grid-template-columns:minmax(0,1fr);gap:14px}.platform-card,.platform-card:nth-child(n+4),.platform-card:last-child{grid-column:auto;padding:23px}.help-items{grid-template-columns:1fr;gap:22px}.install-help{margin-top:36px;padding:26px 0}.help-items h3{display:inline-block;margin:0 0 6px 8px}.help-items p{margin-left:28px}footer{margin:0 20px;flex-direction:column;gap:4px;padding:20px 0}.access-panel{padding:24px;margin:20px auto}.password-row{flex-direction:column}.history-row{flex-direction:column;gap:5px}}
@media(prefers-reduced-motion:no-preference){.button,.channel{transition:background .15s,color .15s}}