증분 효과

<div class="lift"><div class="head">EXPERIMENT <b id="gap">+0.0 pt LIFT</b></div><div class="plot"><div class="line treat"><span>EXPOSED</span><i id="t"></i></div><div class="line ctrl"><span>CONTROL</span><i id="c"></i></div><div class="brace" id="brace"></div></div><div class="base"><span>START</span><span>AFTER CAMPAIGN</span></div></div>

.lift{width:min(86%,600px);font:850 clamp(10px,max(2vmin,1vw),14px)/1.2 sans-serif}.head,.base{display:flex;justify-content:space-between;align-items:center}.head{border-bottom:2px solid var(--fg);padding-bottom:8px}.head b{color:var(--accent)}.plot{position:relative;height:clamp(85px,23vmin,170px);margin-top:clamp(8px,2vmin,17px);border-left:1px solid var(--line);border-bottom:1px solid var(--line)}.line{position:absolute;left:8%;right:7%;height:2px;transform-origin:left center;transition:transform .7s}.line span{position:absolute;right:0;top:-19px;color:var(--fg);font-size:clamp(10px,max(1.5vmin,1vw),12px)}.ctrl span{top:7px}.line i{display:block;width:100%;height:2px;background:currentColor}.treat{top:65%;color:var(--accent)}.ctrl{top:65%;color:var(--accent-2)}.brace{position:absolute;right:7%;top:25%;height:40%;border-right:2px solid var(--fg);transition:height .7s,top .7s}.base{padding-top:6px;color:var(--muted);font-size:clamp(10px,max(1.5vmin,1vw),12px)}

let opened=false;function draw(){const t=document.querySelector('#t'),c=document.querySelector('#c'),b=document.querySelector('#brace');t.parentElement.style.transform='rotate('+(opened?-19:0)+'deg)';c.parentElement.style.transform='rotate('+(opened?-7:0)+'deg)';b.style.top=opened?'29%':'63%';b.style.height=opened?'24%':'2%';document.querySelector('#gap').textContent=opened?'+2.0 pt LIFT':'+0.0 pt LIFT'}draw();setInterval(()=>{opened=!opened;draw()},1700);