@import url('https://fonts.googleapis.com/css2?family=Barlow+Condensed:wght@500;600;700&family=Barlow:wght@400;500;600;700&display=swap');
:root{color-scheme:dark;--bg:oklch(.207 .003 250);--panel:oklch(.225 .003 250);--elevated:oklch(.276 .003 250);--ink:oklch(.94 .002 250);--muted:oklch(.71 .004 250);--line:oklch(.335 .003 250);--red:oklch(.52 .155 25);--red-light:oklch(.72 .13 25);--mono:Consolas,'Courier New',monospace;--sans:Barlow,'Microsoft YaHei','PingFang SC',sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.6}a{color:inherit;text-decoration:none}button{font:inherit;color:inherit;cursor:pointer}button,a{-webkit-tap-highlight-color:transparent}button:focus-visible,a:focus-visible{outline:2px solid var(--red-light);outline-offset:5px}button{border:0}h1,h2,h3,p{margin:0}h1,h2,h3{text-wrap:balance}p{text-wrap:pretty}img{display:block;max-width:100%}::selection{background:var(--red);color:var(--ink)}.mono{font-family:var(--mono);font-size:12px;letter-spacing:.04em}.muted{color:var(--muted)}.skip{position:fixed;left:20px;top:-100px;z-index:10;padding:12px;background:var(--ink);color:var(--bg)}.skip:focus{top:12px}.topbar{height:92px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 4.5vw}.brand{display:flex;align-items:center;gap:24px}.wordmark{font-family:'Barlow Condensed',Impact,sans-serif;font-size:47px;font-weight:700;line-height:1;letter-spacing:-.025em}.brand-slash{color:var(--red-light);padding-left:4px;font-weight:500}.brand-name{font-size:12px;letter-spacing:.12em;font-weight:500;line-height:1.7}.brand-name>span{display:block;color:var(--muted);font-size:11px;letter-spacing:.14em}.topbar nav{display:flex;align-items:center;gap:34px;font-size:14px;color:var(--muted);height:100%}.topbar nav a{display:flex;align-items:center;height:100%;transition:color .2s}.topbar nav a:hover{color:var(--ink)}.topbar .nav-active{color:var(--ink);border-bottom:2px solid var(--red-light)}.topbar nav a span{margin-left:9px}.container{max-width:1600px;margin:auto;padding:0 4.5vw}.intro{padding:45px 0 36px;display:flex;align-items:flex-end;justify-content:space-between}.intro-label{font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:var(--muted);margin-bottom:10px}h1{font-size:clamp(40px,4.3vw,64px);letter-spacing:-.03em;line-height:1.25;font-weight:600}.title-mark{font-family:Barlow,sans-serif;font-size:.65em;vertical-align:top;color:var(--red-light);margin-left:24px}.intro-note{padding-bottom:4px}.intro-note p{font-size:15px;margin-bottom:5px}.intro-note>span{font-size:13px;color:var(--muted)}.observation{display:grid;grid-template-columns:minmax(0,1fr) 310px;align-items:start;border:1px solid var(--line);background:var(--panel)}.viewer{min-width:0;border-right:1px solid var(--line)}.viewer-bar{display:flex;justify-content:space-between;align-items:center;padding:13px 21px;font-size:13px;border-bottom:1px solid var(--line)}.viewer-bar .mono{color:var(--muted);margin-left:8px}.screen{aspect-ratio:16/9;position:relative;isolation:isolate;background:oklch(.12 0 0);overflow:hidden}.poster{position:absolute;inset:0;background:none;width:100%;height:100%;padding:0;overflow:hidden;text-align:left}.poster-img{width:100%;height:100%;object-fit:cover;filter:brightness(.58) saturate(.48);transition:filter .35s,transform .55s}.poster:hover .poster-img{filter:brightness(.72) saturate(.7);transform:scale(1.015)}.poster:after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,transparent 60%,oklch(.12 0 0/.75))}.play-center{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:16px;z-index:1}.play-box{width:64px;height:64px;background:var(--red);display:grid;place-items:center;border:1px solid oklch(.72 .13 25/.45);transition:background .2s}.poster:hover .play-box{background:oklch(.57 .17 25)}.play-box svg{width:22px;height:22px}.play-label{font-size:14px;letter-spacing:.14em;text-shadow:0 1px 3px oklch(.1 0 0)}.poster-caption{position:absolute;bottom:22px;left:23px;right:23px;display:flex;align-items:end;justify-content:space-between;gap:20px;color:oklch(.91 0 0);z-index:1;font-size:12px}.poster-caption>span:first-child{max-width:70%;font-family:var(--mono);font-size:11px;line-height:1.6}.screen iframe,.screen #yt-player{position:absolute;inset:0;border:0;width:100%;height:100%}.video-details{padding:23px 25px 20px}.detail-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px;color:var(--muted)}.category{color:var(--red-light);font-size:12px}.video-details h2{font-size:23px;line-height:1.45;font-weight:500}.video-details>p{color:var(--muted);font-size:14px;margin-top:9px;min-height:22px}.source-row{display:flex;align-items:center;justify-content:space-between;gap:18px;border-top:1px solid var(--line);margin-top:22px;padding-top:15px;font-size:12px;color:var(--muted)}.source-row>span{min-width:0}.source-row #video-author{color:var(--ink);margin-left:12px}.source-row a{flex-shrink:0;color:var(--ink)}.source-row a:hover{color:var(--red-light)}.source-row a span{margin-left:7px}.playback-note{padding:10px 25px;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}.playlist{min-width:0}.playlist-toggle{width:100%;display:flex;align-items:center;justify-content:space-between;gap:8px;padding:13px 20px;background:transparent;text-align:left;font-size:13px;border-bottom:1px solid var(--line);cursor:default}.playlist-toggle .mono{color:var(--muted);margin-left:5px}.count{color:var(--muted);font-family:var(--mono);font-size:12px}.mobile-chevron{display:none}.playlist-group{padding:17px 0 4px}.group-title{padding:0 20px 10px;font-size:12px;color:var(--muted);display:flex;justify-content:space-between;font-weight:400}.playlist-item{width:100%;display:flex;align-items:center;gap:13px;padding:13px 19px;background:transparent;text-align:left;transition:background .2s}.playlist-item:hover{background:oklch(.25 .003 250)}.playlist-item[aria-current=true]{background:var(--elevated)}.item-num{font-family:var(--mono);font-size:11px;color:var(--muted);align-self:flex-start;padding-top:4px}.playlist-item[aria-current=true] .item-num{color:var(--red-light)}.item-copy{flex:1;min-width:0}.item-title{display:block;font-size:14px;line-height:1.5}.item-sub{display:block;font-size:11px;color:var(--muted);margin-top:4px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.item-arrow{font-size:17px;color:var(--muted)}.playlist-foot{margin:19px 20px 0;padding:16px 0;border-top:1px solid var(--line);display:flex;justify-content:space-between;color:var(--muted);font-size:11px}.playlist-foot .mono{font-size:10px}.archive{padding:68px 0 65px}.section-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:28px}.section-heading h2{font-size:26px;font-weight:500}.section-heading p{font-size:14px;color:var(--muted);margin-top:6px}.section-heading>.mono{color:var(--muted)}.archive-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));column-gap:25px;row-gap:31px}.archive-card{min-width:0;background:none;padding:0;text-align:left}.thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--elevated)}.thumb img{width:100%;height:100%;object-fit:cover;filter:saturate(.45) brightness(.82);transition:filter .25s,transform .4s}.archive-card:hover .thumb img{filter:saturate(.85) brightness(1);transform:scale(1.025)}.thumb-code{position:absolute;left:12px;top:12px;background:oklch(.16 0 0/.9);padding:3px 7px;font-size:10px;font-family:var(--mono);color:oklch(.9 0 0)}.thumb-action{position:absolute;right:12px;bottom:12px;background:oklch(.16 0 0/.9);width:31px;height:31px;display:grid;place-items:center;font-size:13px}.archive-card[aria-current=true] .thumb{outline:1px solid var(--red-light);outline-offset:-1px}.card-meta{display:flex;justify-content:space-between;align-items:center;font-size:11px;color:var(--muted);margin-top:13px}.archive-card h3{font-size:17px;font-weight:500;line-height:1.5;margin-top:4px}.archive-card:hover h3{color:var(--red-light)}.protocol-thumb{display:flex;flex-direction:column;justify-content:center;align-items:flex-start;padding:28px;background:oklch(.26 .004 250);border:1px solid var(--line)}.protocol-thumb strong{font-family:'Barlow Condensed',sans-serif;font-size:44px;font-weight:500}.protocol-thumb>span:not(.thumb-code):not(.thumb-action){font-size:13px;color:var(--muted)}.protocol-thumb .protocol-number{font-family:var(--mono);font-size:11px!important;margin-top:5px}.external-screen{height:100%;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:13px;padding:30px;text-align:center}.external-screen .protocol-label{font-family:'Barlow Condensed',sans-serif;font-size:48px}.external-screen p{font-size:14px;color:var(--muted)}.external-screen a{margin-top:7px;background:var(--red);padding:11px 22px;font-size:14px}.external-screen a:hover{background:oklch(.57 .17 25)}.about{border-top:1px solid var(--line);display:grid;grid-template-columns:1fr 2fr;gap:50px;padding:43px 0 48px}.footer-mark{font-size:65px}.about>div>p{font-size:14px;line-height:1.9;max-width:680px;margin-top:13px}.about>div:first-child p{font-size:11px;letter-spacing:.12em;color:var(--muted)}.about h2{font-size:18px;font-weight:500}.footer{border-top:1px solid var(--line);padding:22px 4.5vw;display:flex;justify-content:space-between;font-family:var(--mono);font-size:11px;color:var(--muted)}.footer a{font-family:var(--sans);font-size:12px}.noscript{padding:24px}.noscript a{text-decoration:underline}
@media(min-width:1600px){.topbar,.footer{padding-left:max(4.5vw,calc((100vw - 1456px)/2));padding-right:max(4.5vw,calc((100vw - 1456px)/2))}.container{padding:0 72px}}
@media(max-width:1100px){.observation{grid-template-columns:minmax(0,1fr) 275px}.playlist-item{padding:11px 15px;gap:10px}.playlist-toggle{padding:13px 15px}.group-title{padding-left:15px;padding-right:15px}.playlist-toggle .mono{display:none}.intro{padding-top:35px}.video-details{padding:20px}.video-details h2{font-size:20px}.source-row{align-items:flex-start}.archive-grid{gap:24px 18px}.item-sub{font-size:11px}.playlist-foot{margin:12px 15px 0}}
@media(max-width:800px){.topbar{height:78px;padding:0 5vw}.brand{gap:14px}.brand-name{font-size:10px}.brand-name>span{font-size:10px}.wordmark{font-size:39px}.topbar nav{gap:20px;font-size:12px}.topbar nav a:first-child{display:none}.container{padding:0 5vw}.intro{padding:30px 0 25px}.intro-note p{font-size:12px}.intro-note>span{font-size:11px}.intro-label{font-size:10px}.observation{grid-template-columns:1fr}.viewer{border-right:0}.playlist{border-top:1px solid var(--line)}.playlist-toggle{padding:17px 20px;cursor:pointer;font-size:14px}.playlist-toggle .mono{display:inline}.playlist-toggle .count{margin-left:auto}.mobile-chevron{display:block;margin-left:12px}.playlist-toggle[aria-expanded=false] .mobile-chevron{transform:rotate(-90deg)}#playlist-content[hidden]{display:none}.playlist-foot{display:none}.playlist-group{padding-top:16px}.group-title{padding-left:20px;padding-right:20px}.playlist-item{padding:13px 20px}.item-copy{display:flex;align-items:center;justify-content:space-between;gap:20px}.item-sub{max-width:45%;margin:0}.playlist-group:last-child{padding-bottom:16px}.archive{padding:43px 0}.archive-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.about{grid-template-columns:1fr 2fr;gap:25px}.poster-caption>span:first-child{font-size:10px}.source-row{flex-wrap:wrap}.section-heading h2{font-size:23px}}
@media(max-width:520px){.brand-name{display:none}.topbar{height:68px}.topbar nav{gap:24px}.intro{align-items:start;flex-direction:column;gap:13px}.intro h1{font-size:44px}.intro-note p{font-size:13px}.intro-note>span{display:none}.intro-label{font-size:10px;margin-bottom:8px}.title-mark{margin-left:19px}.viewer-bar{padding:11px 14px;font-size:12px}.viewer-bar .mono{font-size:10px}.video-details{padding:17px 16px}.video-details h2{font-size:20px}.video-details>p{font-size:13px}.source-row{font-size:11px;gap:13px;margin-top:16px}.source-row #video-author{margin-left:6px}.playback-note{padding:10px 16px;font-size:11px}.play-box{width:48px;height:48px}.play-box svg{width:18px}.play-center{gap:10px}.play-label{font-size:12px}.poster-caption{left:14px;bottom:12px;right:14px}.poster-caption>span:first-child{display:none}.poster-caption{justify-content:flex-end}.poster-caption>.mono{font-size:10px}.item-copy{display:block}.item-sub{max-width:100%;margin-top:3px}.archive-grid{grid-template-columns:1fr;gap:27px}.section-heading{align-items:start;gap:14px}.section-heading p{font-size:12px}.section-heading>.mono{font-size:10px;padding-top:8px;white-space:nowrap}.archive-card h3{font-size:18px}.card-meta{font-size:12px}.about{grid-template-columns:1fr;gap:27px;padding:32px 0}.about>div:first-child{display:flex;align-items:center;gap:20px}.footer-mark{font-size:45px}.about>div:first-child p{margin:0;font-size:10px}.about>div>p{font-size:13px}.footer{padding:20px 5vw;font-size:9px}.footer a{font-size:11px}.external-screen{padding:16px;gap:6px}.external-screen .protocol-label{font-size:30px}.external-screen p{font-size:12px}.external-screen a{padding:8px 15px;font-size:12px}.detail-top .mono{font-size:10px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}

.brand-logo{display:block;width:56px;height:56px;object-fit:contain;border-radius:6px;flex-shrink:0}.footer-logo{display:block;width:80px;height:80px;object-fit:contain;border-radius:6px}@media(max-width:800px){.brand-logo{width:48px;height:48px}}@media(max-width:520px){.brand-logo{width:44px;height:44px}.footer-logo{width:60px;height:60px}}

.footer-links{display:flex;align-items:center;gap:24px}.footer-links a:hover{color:var(--ink)}@media(max-width:520px){.footer{flex-wrap:wrap;gap:14px}.footer-links{gap:20px}.topbar nav{gap:18px}}
.contract{display:flex;align-items:center;flex-wrap:wrap;gap:12px 18px;padding:15px 19px;margin-bottom:24px;border:1px solid var(--line);background:var(--panel)}.contract-label{font-family:var(--mono);font-size:13px;color:var(--red-light)}.contract code{font-family:var(--mono);font-size:14px;overflow-wrap:anywhere;user-select:all;min-width:0}.contract button{padding:8px 14px;background:var(--elevated);font-size:13px;border:1px solid var(--line);margin-left:auto;white-space:nowrap}.contract button:hover{background:var(--red)}#copy-feedback{font-size:12px;color:var(--muted)}#copy-feedback:empty{display:none}@media(max-width:520px){.contract{gap:10px;padding:14px}.contract code{flex-basis:calc(100% - 35px);font-size:12px}.contract button{margin-left:0}}