:root{color-scheme:light dark;--surface:#fff;--text:#17191c;--secondary:#686f7a;--input:#f5f6f7;--border:#e5e7eb;--button:#17191c;--on-button:#fff;--danger:#c03c35}
@media(prefers-color-scheme:dark){:root{--surface:#1a1b1e;--text:#f3f4f6;--secondary:#acb1bd;--input:#27292e;--border:#3a3d44;--button:#f3f4f6;--on-button:#17191c;--danger:#ff8d85}}
*{box-sizing:border-box}body{margin:0;background:var(--surface);color:var(--text);font:15px/1.7 -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}header,main,footer{width:min(1040px,calc(100% - 64px));margin:auto}header{display:flex;align-items:center;justify-content:space-between;padding:22px 0}.brand{display:flex;align-items:center;gap:12px;color:var(--text);text-decoration:none;font-size:24px;font-weight:600;letter-spacing:1px}.brand img{width:40px;height:40px;object-fit:contain}.badge{font-size:12px;border:1px solid var(--border);padding:3px 12px;border-radius:20px;color:var(--secondary)}main{display:grid;grid-template-columns:minmax(0,1fr) 400px;align-items:start;gap:64px;padding:16px 0 26px}.left-column{min-width:0}.intro{padding:6px 0 22px}h1{font-size:clamp(32px,3.4vw,44px);font-weight:600;line-height:1.35;letter-spacing:-1px;margin:0 0 14px}.lead{font-size:17px;color:var(--secondary);line-height:1.8;margin:0}h2{font-size:19px;font-weight:600;line-height:1.5;margin:0 0 8px}.download-panel{border:1px solid var(--border);border-radius:20px;padding:24px}fieldset{padding:0;margin:0;border:0;min-width:0}legend{font-size:14px;margin-bottom:12px}.platform-options{display:flex;gap:10px}.platform{position:relative;flex:1;margin:0;cursor:pointer}.platform input{position:absolute;opacity:0;width:1px;height:1px}.platform span{display:block;padding:13px 15px;border:1px solid var(--border);border-radius:12px}.platform input:checked+span{border-color:var(--text);background:var(--input)}.platform input:focus-visible+span{outline:2px solid var(--secondary);outline-offset:3px}.platform strong{display:block;font-size:16px;font-weight:600}.platform small{display:block;font-size:12px;color:var(--secondary)}.release-line{display:flex;justify-content:space-between;gap:8px;font-size:13px;padding:8px 0 14px;border-bottom:1px solid var(--border)}.account-section{padding-top:18px}.muted{color:var(--secondary);margin:0 0 14px}.account-section>.muted{font-size:13px}form label{display:block;font-size:14px;margin:12px 0 6px}input{display:block;width:100%;height:48px;border:1px solid transparent;border-radius:12px;background:var(--input);color:var(--text);font:inherit;padding:0 14px}input:focus-visible,button:focus-visible,a:focus-visible,summary:focus-visible{outline:2px solid var(--secondary);outline-offset:3px}button{cursor:pointer;font:inherit}.primary{display:block;width:100%;min-height:48px;border:0;border-radius:24px;background:var(--button);color:var(--on-button);font-weight:500;margin-top:18px;padding:10px 16px}.primary:disabled{opacity:.5;cursor:default}.text-button{border:0;background:none;color:var(--secondary);padding:8px 0;font-size:13px;text-decoration:underline;text-underline-offset:3px}.text-button:disabled{opacity:.5;cursor:wait}.error{color:var(--danger);font-size:13px;line-height:1.6;margin:10px 0 0;overflow-wrap:anywhere}.error:empty,#status:empty{display:none}.caption{color:var(--secondary);font-size:12px;line-height:1.7;margin:10px 0}.account-note{font-size:12px;color:var(--secondary);margin:14px 0 0}.signed-in{display:flex;align-items:center;gap:8px;font-size:13px;overflow-wrap:anywhere}.signed-in strong{min-width:0}.signed-in .text-button{margin-left:auto;flex-shrink:0}a{color:var(--text)}#direct-link{font-size:13px;display:block}#renew-link{display:block}.details{border-top:1px solid var(--border);padding-top:20px}.guide-label{font-size:12px;color:var(--secondary);margin:8px 0 4px}.release-notes{margin-top:20px}.details h2{font-size:16px}.details ol{padding-left:21px;color:var(--secondary);font-size:13px;line-height:1.75;margin:4px 0 10px}.details li+li{margin-top:5px}.details .muted{font-size:13px;white-space:pre-line}details{font-size:12px;margin-top:10px}summary{cursor:pointer;color:var(--secondary)}code{display:block;font:12px/1.8 ui-monospace,SFMono-Regular,Consolas,monospace;overflow-wrap:anywhere}footer{display:flex;justify-content:space-between;color:var(--secondary);font-size:12px;border-top:1px solid var(--border);padding:16px 0 20px}[hidden]{display:none!important}
@media(max-width:800px){header,main,footer{width:min(520px,calc(100% - 40px))}header{padding:24px 0}main{grid-template-columns:1fr;gap:22px;padding:8px 0 28px}.left-column{display:contents}.intro{grid-row:1;padding:8px 0}.download-panel{grid-row:2}.details{grid-row:3}h1{font-size:32px;letter-spacing:0;margin-bottom:16px}.lead{font-size:15px}.download-panel{padding:24px}.details{padding-top:20px}footer{gap:16px;flex-wrap:wrap}}
@media(prefers-reduced-motion:no-preference){.primary,.platform span{transition:background-color .15s,opacity .15s}.primary:not(:disabled):hover{opacity:.85}}