:root{
  --ink:#1A1A1A;--ink2:#292929;--char:#3D3D3D;--graph:#636363;--steel:#C2C2C2;--fog:#E8E8E8;--cloud:#F7F7F7;
  --blue:#024AD8;--bright:#296EF9;--soft:#C9E0FC;--navy:#0E3191;--white:#FFFFFF;
  --font:"Pretendard","Malgun Gothic","맑은 고딕","Apple SD Gothic Neo",-apple-system,"Segoe UI",system-ui,sans-serif;
  --mono:"Cascadia Code","Consolas","D2Coding","SF Mono",Menlo,monospace;
  --w:1120px;--gutter:24px;--r:12px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;overflow-y:scroll;scrollbar-gutter:stable}
body{overflow-x:hidden;overflow-x:clip} /* clip — 가로 넘침만 자르고 스크롤 상자를 만들지 않아 상단 메뉴(sticky)가 붙어 있다 */
.hero .wrap>*,.card,.step,.doc .wrap>*{min-width:0}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--white);line-height:1.6;font-size:17px;-webkit-font-smoothing:antialiased;word-break:keep-all}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{margin:0;line-height:1.2;letter-spacing:-.01em}
p{margin:0}
code{font-family:var(--mono);font-size:.92em;background:var(--cloud);padding:.1em .4em;border-radius:5px}
.wrap{max-width:var(--w);margin:0 auto;padding:0 var(--gutter)}
.btn{display:inline-flex;align-items:center;gap:.5em;padding:.7em 1.25em;border-radius:999px;font-weight:700;font-size:15px;border:1.5px solid transparent;white-space:nowrap;cursor:pointer}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--navy)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--steel)}
.btn-ghost:hover{border-color:var(--ink)}
.label{display:inline-block;color:var(--blue);font-weight:700;font-size:14px;letter-spacing:.02em;margin-bottom:14px}

/* nav */
.nav{position:relative;z-index:10;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--fog)} /* 상단 메뉴는 고정하지 않는다 — 본문과 함께 올라간다 */
.nav .wrap{display:flex;align-items:center;gap:28px;height:64px}
.brand{font-weight:800;font-size:20px;color:var(--ink);letter-spacing:-.02em}
.brand b{color:var(--blue)}
.nav-links{display:flex;gap:22px;margin-left:auto;align-items:center;font-size:15px}
.nav-links a{color:var(--char);font-weight:600}
.nav-links a.active{color:var(--blue)}
.nav-links .btn{padding:.5em 1.05em;font-size:14px;color:#fff}

/* sections */
section{padding:88px 0}
section+section{border-top:1px solid var(--fog)}
.sec-head{max-width:720px;margin-bottom:40px}
.sec-head h2{font-size:34px;font-weight:800}
.sec-head p{color:var(--char);font-size:18px;margin-top:12px}

/* hero */
.hero{padding:36px 0 48px}
.hero .wrap{display:grid;grid-template-columns:1.05fr 1fr;gap:56px;align-items:center}
.hero h1{font-size:50px;font-weight:800;letter-spacing:-.02em}
.hero .lead{font-size:19px;color:var(--char);margin:22px 0 32px;max-width:520px}
.hero-actions{display:flex;align-items:center;flex-wrap:wrap;gap:16px 24px}
.hero-more{font-size:15px;font-weight:600;color:var(--char)}
.hero-more span{color:var(--blue);margin-left:4px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
.benefit-visual{margin:0;padding:18px;border:1px solid #e3e8f0;border-radius:24px;background:linear-gradient(155deg,#fafbfe,#edf3fc);box-shadow:0 24px 64px #0e31910c}
.suction-visual{display:block;width:100%;height:auto;overflow:visible}
.intake-tracks path{fill:none;stroke:#c4d4ed;stroke-width:1;opacity:.6}
.intake-current path{fill:none;stroke:#6c9be8;stroke-width:1.8;stroke-linecap:round;stroke-dasharray:5 95;animation:intake-flow 10s linear infinite;opacity:.35}
.intake-tags rect{fill:white;stroke:#d9e2ef;stroke-width:1}
.intake-tags text{fill:#596272;font-family:var(--font);font-size:13px;text-anchor:middle;dominant-baseline:central}
.vacuum-head .head-body{fill:var(--blue)}
.vacuum-head .head-shadow{fill:#024ad818}
.vacuum-head .head-intake{fill:#78a5ff}
.vacuum-head .head-outlet{fill:var(--navy)}
.vacuum-head text{fill:white;font-family:var(--font);font-size:23px;font-weight:800;letter-spacing:-.7px;text-anchor:middle;dominant-baseline:central}
.customer-link{fill:none;stroke:#93b6ee;stroke-width:1.5}
.customer-caption{fill:var(--navy);font-family:var(--font);font-size:12px;text-anchor:middle}
@keyframes intake-flow{from{stroke-dashoffset:5}to{stroke-dashoffset:-95}}

a:focus-visible,button:focus-visible{outline:3px solid var(--bright);outline-offset:5px}
section[id]{scroll-margin-top:80px}

/* features */
.rows{display:grid;gap:22px}
.row{display:block}
.card h3{overflow-wrap:anywhere}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.card{background:var(--cloud);border-radius:var(--r);padding:26px 24px;min-height:176px}
.card.blue{background:var(--blue);color:#fff}
.card h3{font-size:18px;font-weight:800;margin-bottom:10px;letter-spacing:-.005em}
.card p{font-size:15px;color:var(--char)}
.card.blue p{color:var(--soft)}
.card .num{display:inline-block;width:26px;height:26px;border-radius:50%;background:var(--ink);color:#fff;font-weight:800;font-size:13px;text-align:center;line-height:26px;margin-bottom:14px}
.card.blue .num{background:#fff;color:var(--blue)}


#features .card{position:relative;padding:30px 24px;min-height:180px}
#features .card h3{padding-right:40px;min-height:44px;margin-bottom:16px;line-height:1.25}
#features .card p{line-height:1.8;font-size:15px;letter-spacing:-.03em}
#features .card p>span{display:block}
.card-sign{position:absolute;top:24px;right:22px;width:30px;height:30px;border:1.5px solid #cbd3df;border-radius:50%;background:white;color:var(--char)}
.card-sign::before,.card-sign-plus::after{content:"";position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);background:currentColor;border-radius:1px}
.card-sign::before{width:14px;height:3px}
.card-sign-plus::after{width:3px;height:14px}
.card.blue .card-sign{background:#ffffff18;border-color:#ffffff66;color:white}

/* Flexible video settings, shown through customer situations */
.flexibility-section .sec-head{max-width:900px}
.flexibility-section .sec-head p+p{margin-top:6px}
.flexibility-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.scenario{min-width:0;padding:28px 26px;border:1px solid var(--fog);border-radius:16px;background:linear-gradient(180deg,#f8faff,#fff);display:flex;flex-direction:column;align-items:flex-start}
.scenario-icon{display:grid;place-items:center;width:44px;height:44px;background:#e9f0fe;border-radius:12px;color:var(--blue);margin-bottom:24px}
.scenario-icon svg{width:28px;height:28px;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.scenario-label{font-size:13px;font-weight:700;color:var(--blue);margin-bottom:10px}
.scenario h3{font-size:20px;line-height:1.5;letter-spacing:-.025em;margin-bottom:12px}
.scenario p{font-size:15px;line-height:1.8;color:var(--char);margin-bottom:24px}
.scenario-settings{display:flex;flex-wrap:wrap;gap:6px;margin-top:auto}
.scenario-settings span{background:var(--cloud);border:1px solid var(--fog);border-radius:999px;padding:4px 11px;font-size:12px;color:var(--graph)}
.flexibility-note{display:flex;justify-content:center;align-items:center;gap:10px;margin-top:32px;font-size:16px;font-weight:600;color:var(--char);text-align:center}
.flexibility-note>span{color:var(--blue);font-size:24px;flex:none}

/* steps */
.launch-section{background:linear-gradient(180deg,#fafcff,#f3f7fd)}
.launch-section .sec-head{max-width:none}
.launch-flow{display:grid;grid-template-columns:1fr 1fr .8fr;gap:26px;align-items:stretch}
.launch-flow .step{padding:30px;box-shadow:0 8px 24px #0e319105}
.launch-flow .step::after{content:"\2192";position:absolute;right:-22px;top:50%;transform:translateY(-50%);font-size:22px;color:#8ca9d6;z-index:1}
.launch-detail{display:inline-block;margin-top:20px;font-size:13px;font-weight:600}
.launch-open{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;background:var(--blue);color:white;padding:28px 20px;border-radius:var(--r)}
.open-icon{display:grid;place-items:center;width:44px;height:44px;border:1px solid #ffffff55;border-radius:50%;font-size:26px;margin-bottom:12px}
.open-label{font-size:10px;font-weight:700;letter-spacing:.15em;color:var(--soft);margin-bottom:8px}
.launch-open h3{font-size:30px;margin-bottom:12px}
.launch-open p{font-size:14px;color:#e0ecff}
.launch-signoff{font-size:24px;letter-spacing:-.03em;text-align:center;margin-top:40px;color:var(--char)}
.launch-signoff strong{color:var(--blue)}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.step{position:relative;background:#fff;border:1px solid var(--fog);border-radius:var(--r);padding:26px 24px 24px}
.step .n{display:inline-block;width:34px;height:34px;border-radius:50%;background:var(--blue);color:#fff;font-weight:800;text-align:center;line-height:34px;margin-bottom:16px}
.step:nth-child(2) .n{background:var(--bright)}
.step:nth-child(3) .n{background:var(--navy)}
.step h3{font-size:19px;font-weight:800;margin-bottom:8px}
.step p{font-size:15px;color:var(--char)}
.step .url{margin-top:14px;font-family:var(--mono);font-size:13px;background:var(--cloud);border-radius:8px;padding:9px 11px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.step .url+.url{margin-top:6px}
.step .url .host{color:var(--blue);font-weight:700}
.step .url .old{color:var(--graph);text-decoration:line-through}
.band{margin-top:28px;border-radius:var(--r);background:var(--cloud);padding:18px 24px;display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px;color:var(--graph);font-size:14px}
.band .k{font-weight:700;color:var(--char)}
.band .flow{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.band .flow span{padding:4px 12px;border-radius:999px;background:#fff;border:1px solid var(--fog)}
.band .flow i{font-style:normal;color:var(--steel)}
.band .tail{margin-left:auto;color:var(--blue);font-weight:700}

/* footer */
footer{border-top:1px solid var(--fog);padding:34px 0;color:var(--graph);font-size:14px}
footer .wrap{display:flex;flex-wrap:wrap;gap:12px 26px;align-items:center}
footer .brand{font-size:16px}
footer .links{display:flex;gap:18px}
footer .copy{margin-left:auto}
footer .copy a{color:inherit}

/* doc pages */
.doc{padding:56px 0 88px}
.doc .wrap{display:grid;grid-template-columns:200px 1fr;gap:48px;align-items:start}
.toc{position:sticky;top:88px;font-size:14px}
.toc a{display:block;color:var(--char);padding:6px 0;border-left:2px solid var(--fog);padding-left:12px}
.toc a:hover{color:var(--blue);text-decoration:none;border-color:var(--blue)}
.doc h1{font-size:38px;font-weight:800;margin-bottom:10px}
.doc .intro{color:var(--char);font-size:18px;margin-bottom:40px}
.doc h2{font-size:24px;font-weight:800;margin:56px 0 16px;scroll-margin-top:84px}
.doc h2:first-of-type{margin-top:0}
.doc h3{font-size:17px;font-weight:700;margin:26px 0 10px}
.doc p{margin:0 0 12px;color:var(--char);font-size:16px}
.doc ul{margin:0 0 12px;padding-left:20px;color:var(--char);font-size:15.5px}
.doc li{margin:4px 0}
.doc pre{padding-top:42px}
.doc p code,.doc li code,.doc td code{white-space:normal;overflow-wrap:anywhere}
.integration-change,.integration-result{padding:20px 22px;border-radius:12px;margin:16px 0 20px;background:var(--cloud);border:1px solid var(--fog)}
.integration-change code,.integration-result code{display:block;background:none;padding:0;overflow-wrap:anywhere;font-size:13.5px;line-height:1.9}
.integration-change strong{color:var(--blue);font-weight:700}
.integration-label{display:block;font-size:12px;font-weight:700;color:var(--graph);margin-bottom:8px}
.integration-arrow{display:block;color:var(--blue);margin:10px 0;font-size:20px;line-height:1}
.integration-result{background:#f1f6ff;border-color:#ccdcfa;border-left:3px solid var(--blue)}
.integration-result code strong{color:var(--blue);background:#dfeaff;border-radius:4px;box-decoration-break:clone;-webkit-box-decoration-break:clone}
.doc .reference-source{margin-top:32px;font-size:14px;color:var(--graph)}
pre{position:relative;margin:0 0 16px;background:var(--ink);color:#f1f1f1;border-radius:10px;padding:16px 18px;font-family:var(--mono);font-size:13.5px;line-height:1.55;overflow:auto}
pre code{background:none;padding:0;font-size:inherit;color:inherit}
pre .copy{position:absolute;top:10px;right:10px;background:rgba(255,255,255,.12);color:#fff;border:0;border-radius:6px;padding:4px 10px;font-size:12px;cursor:pointer;font-family:var(--font)}
pre .copy:hover,pre .copy.done{background:var(--blue)}
table{width:100%;border-collapse:collapse;font-size:14.5px;margin:0 0 16px}
th,td{text-align:left;vertical-align:top;padding:10px 12px;border-bottom:1px solid var(--fog)}
th{background:var(--cloud);font-weight:700;color:var(--char);font-size:13.5px}
td code{white-space:nowrap}
td .sub{display:block;color:var(--graph);font-size:13px;margin-top:3px}
.why{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:8px 0 8px}
.why .card{min-height:0}
details{border:1px solid var(--fog);border-radius:10px;padding:0 18px;margin:0 0 14px}
details summary{cursor:pointer;font-weight:700;padding:14px 0;list-style:none;display:flex;align-items:center;gap:10px}
details summary::-webkit-details-marker{display:none}
details summary::before{content:"";width:8px;height:8px;border-right:2px solid var(--graph);border-bottom:2px solid var(--graph);transform:rotate(-45deg);transition:transform .2s;margin-left:2px}
details[open] summary::before{transform:rotate(45deg)}
details>*:not(summary){margin-bottom:14px}
.tag{display:inline-block;padding:2px 9px;border-radius:999px;font-size:12px;font-weight:700;margin-right:8px;vertical-align:1px;white-space:nowrap}
.tag-new{background:var(--blue);color:#fff}
.tag-imp{background:var(--soft);color:var(--navy)}
.tag-chg{background:var(--fog);color:var(--char)}
.tag-fix{background:var(--ink);color:#fff}
.tag-plan{background:#fff;border:1px solid var(--steel);color:var(--graph)}
.rel{border-left:3px solid var(--fog);padding-left:22px;margin:0 0 36px}
.rel.current{border-color:var(--blue)}
.rel h3{margin:0 0 6px;font-size:20px}
.rel .date{color:var(--graph);font-weight:400;font-size:15px;margin-left:10px}
.rel ul{list-style:none;padding:0}
.rel li{margin:8px 0;font-size:15.5px;color:var(--char)}
.rel .note{margin-top:14px;padding:12px 14px;background:var(--cloud);border-radius:8px;font-size:14px}
.legend{display:flex;flex-wrap:wrap;gap:8px 18px;align-items:center;padding:14px 18px;background:var(--cloud);border-radius:10px;font-size:14px;color:var(--char);margin-bottom:36px}

@media (max-width:900px){
  .hero .wrap{grid-template-columns:1fr;gap:36px}
  .hero h1{font-size:38px}
  .cards,.steps,.why{grid-template-columns:1fr}
  .flexibility-grid{grid-template-columns:1fr;gap:16px}
  .launch-flow{grid-template-columns:1fr;gap:28px}
  .launch-flow .step::after{content:"\2193";right:50%;top:auto;bottom:-27px;transform:translateX(50%)}
  .doc .wrap{grid-template-columns:1fr}
  .toc{position:static;display:flex;flex-wrap:wrap;gap:4px 14px}
  .toc a{border:0;padding:4px 0}
  /* 좁은 화면 — 메뉴를 숨기지 않고 둘째 줄에: 첫 줄은 로고 · 도입 상담, 둘째 줄은 Demo · Player · Changelog */
  header.nav .wrap{flex-wrap:wrap;height:auto;gap:0 20px;padding-top:10px;padding-bottom:2px} /* air.css 의 고정 높이보다 우선 */
  .nav .wrap::after{content:"";order:1;flex-basis:100%}
  .nav-links{display:contents}
  .nav-links .btn{margin-left:auto}
  .nav-links a:not(.btn){order:2;padding:10px 0 8px;font-size:14.5px;font-weight:500}
  /* 메뉴 영역과 본문 사이 구분선 */
  header.nav{border-bottom:1px solid #dfe5ee} /* air.css 의 선 없음보다 우선 */
  section{padding:64px 0}
  .band .tail{margin-left:0}
}
@media (max-width:520px){
  .hero{padding:24px 0 36px}
  #features .card{padding:26px 20px}
  #features .card p{font-size:13px}
  .card-sign{right:20px}
  .hero h1{font-size:32px}
  .benefit-visual{padding:14px 10px;border-radius:18px}
  .flexibility-note{font-size:14px}
  .launch-signoff{font-size:21px}
  .sec-head h2{font-size:28px}
  footer .copy{margin-left:0}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .intake-current path{animation:none}
  .intake-current{display:none}
}

/* 데모 진입부 — 장 4개 바로가기 (demo.html) */
.demo-teaser .sec-head{max-width:none}
.teaser-grid{display:grid;grid-template-columns:1fr 1fr 2fr 1.3fr;gap:16px}
.teaser{position:relative;display:flex;flex-direction:column;justify-content:flex-end;gap:2px;min-height:300px;padding:20px;border-radius:var(--r);overflow:hidden;color:#fff;background:#0d1220;isolation:isolate}
.teaser:hover{text-decoration:none}
.teaser img{position:absolute;inset:0;z-index:-2;width:100%;height:100%;object-fit:cover;transition:transform .5s}
.teaser:hover img{transform:scale(1.04)}
.teaser::before{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(180deg,transparent 40%,#0b1020d9)}
.teaser-n{font-size:12px;font-weight:700;letter-spacing:.06em;opacity:.8}
.teaser b{font-size:20px;letter-spacing:-.03em}
.teaser>span:last-of-type{font-size:13.5px;opacity:.9}
.teaser:last-child{background:var(--blue);justify-content:space-between}
.teaser:last-child::before{display:none}
.teaser code{order:-1;background:#ffffff1f;color:#fff;font-size:11.5px;line-height:1.7;padding:10px 12px;border-radius:10px;overflow-wrap:anywhere;margin-bottom:auto}
.teaser code em{font-style:normal;font-weight:700;color:#d6e2ff}
.teaser-cta{margin-top:28px;text-align:center}
@media (max-width:900px){
  .teaser-grid{grid-template-columns:1fr 1fr}
  .teaser.wide{grid-column:1/-1;min-height:220px}
  .teaser{min-height:260px}
}