:root{--ink:#1d1d1f;--muted:#717177;--paper:#f5f5f7;--blue:#0071e3;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:#fff;font-synthesis:none;color-scheme:light}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:28px}body{margin:0;min-width:320px;-webkit-font-smoothing:antialiased;line-height:1.65}a{color:inherit;text-decoration:none}button{font:inherit;cursor:pointer}button,a{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible{outline:3px solid #2997ff;outline-offset:5px}h1,h2,h3,p{margin:0}h1,h2,h3{font-weight:600;letter-spacing:-.045em;line-height:1.2}sup{font-size:.48em;vertical-align:super;line-height:0}.container{width:min(1160px,calc(100% - 96px));margin:auto}header{background:var(--paper)}.navigation{display:flex;align-items:center;justify-content:space-between;min-height:72px;gap:26px}.brand{font-size:27px;font-weight:750;letter-spacing:-1.3px;white-space:nowrap}.links{display:flex;gap:32px;font-size:14px;color:#595961}.links a[aria-current]{color:var(--ink)}.links a:hover,.footer-inner>a:not(.brand):hover{text-decoration:underline;text-underline-offset:4px}.intro{text-align:center;padding-block:96px 82px}.eyebrow{font-size:14px;font-weight:550;letter-spacing:.06em;color:#67676e;margin-bottom:20px}h1{font-size:clamp(46px,5.8vw,76px)}.description{font-size:21px;line-height:1.8;color:var(--muted);margin:26px 0 22px}.text-link{font-size:15px;color:#0066cc}.text-link span{margin-left:8px}.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:25px}.section-head .eyebrow{font-size:12px;margin-bottom:9px}h2{font-size:32px}.capacity{font-size:13px;color:var(--muted);padding-bottom:3px}.capacity span{margin:0 7px}.player-shell{position:relative;aspect-ratio:16/9;border-radius:28px;overflow:hidden;background:#202123;color:#f5f5f7}.placeholder{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:20px;text-align:center}.placeholder>p:first-child{font-size:13px;color:#b9bbc0}.placeholder h3{font-size:32px;font-weight:500;margin:19px 0 28px}.placeholder button{padding:12px 24px;min-height:44px;background:#f5f5f7;border:0;border-radius:100px;color:#202123;font-size:14px}.placeholder button span{margin-left:12px}.small{font-size:12px;color:#b9bbc0;margin-top:18px}iframe{position:absolute;inset:0;width:100%;height:100%;border:0}.video-caption{display:flex;justify-content:space-between;gap:20px;font-size:12px;color:var(--muted);margin-top:16px}.help{font-size:12px;color:var(--muted);margin-top:12px}.help button{border:0;background:none;color:#0066cc;margin-left:12px;padding:0}.authorized{border-top:1px solid #dedee3;margin-top:80px;padding-block:58px;display:flex;align-items:center;justify-content:space-between;gap:30px}.authorized .eyebrow{margin-bottom:12px}.authorized p:not(.eyebrow){color:var(--muted);font-size:16px;margin-top:19px}.button{display:inline-flex;align-items:center;justify-content:center;gap:20px;border-radius:100px;background:var(--blue);color:white;padding:12px 25px;min-height:46px;font-size:15px;white-space:nowrap}.button:hover{background:#0077ed}.notes{border-top:1px solid #dedee3;padding-block:30px 70px}.notes h2{font-size:14px;font-weight:600;letter-spacing:0;margin-bottom:14px}.notes p{font-size:12px;color:var(--muted);max-width:820px;margin-top:8px}footer{background:var(--paper)}.footer-inner{display:flex;align-items:center;gap:40px;min-height:110px;font-size:13px;color:var(--muted)}.footer-inner span{margin-left:auto}.skip{position:fixed;left:12px;top:-100px;z-index:100;background:white;padding:10px}.skip:focus{top:12px}[hidden]{display:none!important}.player-shell.expanded{position:fixed;inset:0;z-index:100;border-radius:0;width:100vw;height:100dvh;aspect-ratio:auto}#close-fullscreen{position:absolute;right:14px;top:14px;border:1px solid #ffffff50;border-radius:100px;background:#202123c0;color:white;padding:8px 14px}body.expanded{overflow:hidden}@media(max-width:700px){.container{width:calc(100% - 40px)}.navigation{flex-wrap:wrap;gap:10px;padding-block:17px}.brand{font-size:24px}.links{gap:18px;font-size:12px;flex-wrap:wrap}.intro{padding-block:64px 58px}h1{font-size:46px}.description{font-size:17px}.eyebrow{font-size:12px}.section-head{align-items:flex-start;flex-direction:column;gap:14px;margin-bottom:20px}h2{font-size:27px}.capacity{font-size:12px}.player-shell{border-radius:18px}.placeholder h3{font-size:21px;margin:12px 0 16px}.placeholder>p:first-child,.small{font-size:10px}.placeholder button{padding:8px 18px;min-height:38px;font-size:12px}.small{margin-top:10px}.video-caption{display:block;font-size:11px}.video-caption span{display:block;margin-top:4px}.help{font-size:11px;line-height:1.9}.help button{margin-left:0;display:block;margin-top:8px}.authorized{margin-top:50px;padding-block:38px;flex-direction:column;align-items:flex-start;gap:25px}.authorized p:not(.eyebrow){font-size:14px}.notes{padding-bottom:45px}.footer-inner{flex-wrap:wrap;gap:15px 25px;padding-block:28px;min-height:0}.footer-inner span{margin-left:0;width:100%;font-size:11px}.desktop-break{display:none}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
.intro h1{width:fit-content;max-width:100%;margin-inline:auto;text-align:center;letter-spacing:0}
.site-footer{background:#fff;padding-block:50px 34px}.footer-top{display:flex;align-items:center;gap:36px;padding-bottom:30px;border-bottom:1px solid #dedee3;color:var(--muted);font-size:14px}.footer-top .brand{color:var(--ink)}.back-top{margin-left:auto;display:flex;align-items:center;gap:9px}.back-top svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}.footer-legal{display:flex;align-items:center;gap:10px 26px;flex-wrap:wrap;font-size:12px;color:var(--muted);padding-top:24px}.footer-legal a:hover,.footer-top>a:not(.brand):hover{text-decoration:underline;text-underline-offset:4px}@media(max-width:700px){.site-footer{padding-top:34px}.footer-top{flex-wrap:wrap;gap:22px;font-size:13px;padding-bottom:25px}.footer-top>a:nth-child(2){order:3;width:100%;margin-top:-8px}.footer-legal{display:block;padding-top:20px;font-size:12px}.footer-legal p{margin-bottom:9px}}

.dual-shell{aspect-ratio:auto;border-radius:0;background:#fff;color:var(--ink);overflow:visible}.dual-placeholder{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.preview-card h3{font-size:16px;font-weight:550;line-height:40px;letter-spacing:0}.preview-cover{aspect-ratio:16/9;border-radius:18px;background:#202123;color:#f5f5f7;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:20px}.preview-cover p{font-size:20px}.preview-cover button{min-height:38px;font-size:13px;padding:9px 18px;border-radius:100px;border:0;background:#f5f5f7;color:#202123}.load-note{font-size:12px;color:var(--muted);margin-top:14px}#authorized-login{scroll-margin-top:100px}.dual-shell.expanded{height:100dvh!important;overflow:hidden}.dual-shell.expanded #close-fullscreen{z-index:20}@media(max-width:700px){.dual-placeholder{grid-template-columns:1fr;gap:18px}.preview-card h3{font-size:14px;line-height:34px}.preview-cover{border-radius:14px}.preview-cover p{font-size:18px}}