/* 참고: headspa.korcolorroom.com 의 구조/타이포 위계/각진 모서리(0)/넓은 여백/4:5 이미지 비율 — 컬러는 신규 */
:root{--bg:#f6f3ed;--surface:#fff;--ink:#1c2a31;--muted:#5b676d;--accent:#2b5a66;--accent-d:#1f4550;--brass:#a5834f;--line:#ddd5c7;
--serif:"Noto Serif KR",serif;--sans:"Pretendard",-apple-system,"Apple SD Gothic Neo","Malgun Gothic",sans-serif;--py:56px;--py-sm:40px;--hh:64px}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:var(--hh)}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.75 var(--sans);letter-spacing:-.005em;-webkit-font-smoothing:antialiased;padding-bottom:64px}
img{max-width:100%;height:auto;display:block;border-radius:0}
a{color:inherit}
h1,h2,h3{font-family:var(--serif);font-weight:500;letter-spacing:-.01em;line-height:1.4;margin:0 0 .6em;color:var(--ink)}
h1{font-size:clamp(26px,5vw,38px);font-weight:600}
h2{font-size:clamp(22px,3.6vw,28px)}
h3{font-size:18px}
p{margin:0 0 1em}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
.narrow{max-width:760px;margin:0 auto;padding:0 20px}
.label{font-size:12px;letter-spacing:.14em;color:var(--brass);text-transform:uppercase;font-weight:600;margin-bottom:12px;display:block}
/* header */
.site-header{position:sticky;top:0;z-index:20;background:rgba(246,243,237,.96);border-bottom:1px solid var(--line);height:var(--hh)}
.site-header__in{display:flex;align-items:center;justify-content:space-between;height:100%}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-family:var(--serif);font-weight:600;font-size:18px}
.nav{display:flex;gap:22px;align-items:center;font-size:14px}
.nav a{text-decoration:none;color:var(--muted)}
.nav a:hover{color:var(--ink)}
.nav__cta{background:var(--accent);color:#fff!important;padding:8px 16px}
@media(max-width:700px){.nav a:not(.nav__cta){display:none}.brand{font-size:16px}}
/* sections */
.section{padding:var(--py) 0}
.section--alt{background:var(--surface)}
.section__title{text-align:center;margin-bottom:28px}
.intro{padding:56px 0 32px;text-align:center}
.intro .answer{max-width:640px;margin:0 auto 22px;color:var(--muted)}
.btn{display:inline-block;background:var(--accent);color:#fff;padding:13px 26px;text-decoration:none;font-weight:600;font-size:15px;border:0;cursor:pointer;font-family:inherit}
.btn:hover{background:var(--accent-d)}
.btn--ghost{background:transparent;color:var(--accent);border:1px solid var(--accent)}
.btn--ghost:hover{background:var(--accent);color:#fff}
/* 메인 사례 카드: 전/후 50:50 */
.cases{padding:8px 0 var(--py)}
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px 22px}
@media(max-width:1000px){.case-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:620px){.case-grid{grid-template-columns:1fr}}
.case-card{display:block;text-decoration:none;background:var(--surface);border:1px solid var(--line)}
.case-card[hidden]{display:none}
.cmp{display:grid;grid-template-columns:1fr 1fr;gap:2px;background:var(--line);position:relative}
.cmp figure{margin:0;position:relative;aspect-ratio:4/5;overflow:hidden;background:var(--bg)}
.cmp img{width:100%;height:100%;object-fit:cover}
.cmp figcaption{position:absolute;left:0;bottom:0;background:rgba(28,42,49,.78);color:#fff;font-size:11px;letter-spacing:.14em;padding:3px 9px}
.case-card__body{padding:16px 18px 20px}
.case-card__title{font:500 17px/1.45 var(--serif);margin:0 0 6px}
.case-card__meta{font-size:13px;color:var(--muted);margin:0}
.more{text-align:center;margin-top:34px}
/* 정의 섹션 */
.def{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
@media(max-width:800px){.def{grid-template-columns:1fr;gap:28px}}
.def img{aspect-ratio:4/5;object-fit:cover;width:100%}
.def__lead{font:500 19px/1.7 var(--serif);margin-bottom:1em}
.type-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:28px}
@media(max-width:800px){.type-grid{grid-template-columns:1fr}}
.type-grid div{border-top:2px solid var(--brass);padding-top:12px}
.type-grid p{font-size:14px;color:var(--muted);margin:0}
/* feature-split */
.split{display:flex;min-height:380px;background:var(--accent);color:#fff}
.split__img{flex:1 1 50%;overflow:hidden}
.split__img img{width:100%;height:100%;object-fit:cover}
.split__panel{flex:1 1 50%;padding:56px 48px;display:flex;flex-direction:column;justify-content:center}
.split h2{color:#fff}
.split p{color:#e3ecee}
.split ul{margin:0;padding-left:18px;color:#e3ecee}
@media(max-width:800px){.split{flex-direction:column}.split__img{height:320px;flex:none}.split__panel{padding:36px 22px}}
/* 표 */
.tablewrap{overflow-x:auto;margin:1.2em 0;border:1px solid var(--line);background:var(--surface)}
table{border-collapse:collapse;width:100%;min-width:520px;font-size:15px}
th,td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
th{background:#efe9de;font-weight:600;white-space:nowrap}
tr:last-child td{border-bottom:0}
/* 단계 */
.steps{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:s}
@media(max-width:800px){.steps{grid-template-columns:1fr 1fr}}
.steps li{counter-increment:s;border-top:2px solid var(--accent);padding-top:12px;font-size:14px;color:var(--muted)}
.steps li::before{content:"0" counter(s);display:block;font:600 22px var(--serif);color:var(--accent)}
.steps strong{display:block;color:var(--ink);font-size:16px;margin-bottom:4px}
/* 카드(가이드/관련) */
.rel-grid,.guide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.guide-grid{grid-template-columns:repeat(5,1fr);gap:16px}
@media(max-width:1000px){.guide-grid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:700px){.rel-grid,.guide-grid{grid-template-columns:1fr}}
.rel-card,.guide-card{display:block;text-decoration:none;background:var(--surface);border:1px solid var(--line)}
.rel-card img,.guide-card img{aspect-ratio:4/5;object-fit:cover;width:100%}
.rel-card__t,.guide-card__t{display:block;padding:14px 16px 2px;font:500 16px/1.45 var(--serif)}
.rel-card__b,.guide-card__b{display:block;padding:0 16px 16px;font-size:13px;color:var(--muted)}
@media(max-width:700px){.rel-card,.guide-card{display:grid;grid-template-columns:110px 1fr;align-items:center}.rel-card img,.guide-card img{grid-row:1/3;height:100%;aspect-ratio:auto}}
/* FAQ */
.faq details{background:var(--surface);border:1px solid var(--line);margin-bottom:10px}
.faq summary{cursor:pointer;list-style:none;padding:16px 46px 16px 18px;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:18px;top:50%;transform:translateY(-50%);font-size:22px;color:var(--brass);transition:transform .2s}
.faq details[open] summary::after{transform:translateY(-50%) rotate(45deg)}
.faq summary h3{display:inline;font:500 16px/1.6 var(--sans);margin:0}
.faq details p{padding:0 18px 18px;margin:0;color:var(--muted)}
/* CTA */
.cta{background:var(--ink);color:#fff;text-align:center;padding:var(--py) 0}
.cta h2{color:#fff}
.cta p{color:#c9d3d7;max-width:560px;margin:0 auto 24px}
.cta .btn{background:var(--brass)}
.cta .btn:hover{background:#8d6e3f}
/* article (사례/NSEO 본문) */
.article{padding:48px 0 var(--py)}
.crumb{font-size:13px;color:var(--muted);margin-bottom:18px}
.crumb a{text-decoration:none}
.article .answer{font-size:17px;color:#33424a;border-left:3px solid var(--brass);padding-left:16px;margin:0 0 28px}
.article h2{margin-top:2em}
.photo{margin:26px 0}
.photo img{width:100%;max-width:520px;aspect-ratio:4/5;object-fit:cover;margin:0 auto}
.photo figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:8px}
.facts{margin:0 0 28px}
.summary{background:var(--surface);border:1px solid var(--line);padding:20px 24px 20px 44px;margin:0 0 1.4em}
.quote{border-left:3px solid var(--accent);padding:4px 0 4px 18px;margin:28px 0;font-family:var(--serif)}
.quote cite{display:block;margin-top:8px;font:13px var(--sans);color:var(--muted);font-style:normal}
.updated{font-size:13px;color:var(--muted);margin-top:30px}
/* footer / floating */
.site-footer{background:#14202a;color:#b7c3c8;padding:44px 0;font-size:13px}
.site-footer__brand{font:600 18px var(--serif);color:#fff;margin:0 0 14px}
.site-footer__links{list-style:none;padding:0;margin:0 0 18px;display:flex;flex-wrap:wrap;gap:6px 18px}
.site-footer a{text-decoration:none}
.site-footer__biz{margin:0 0 6px;line-height:1.8}
.floating{position:fixed;left:50%;transform:translateX(-50%);bottom:14px;z-index:30;background:var(--accent);color:#fff;text-decoration:none;padding:12px 26px;font-weight:600;font-size:14px;box-shadow:0 6px 20px rgba(0,0,0,.25)}
/* consultation */
.guide-steps{margin:0 0 28px;padding-left:20px}
.cta-pair{display:flex;gap:12px;flex-wrap:wrap;margin:24px 0}
.shots{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:600px){.shots{grid-template-columns:1fr}}
.shots div{background:var(--surface);border:1px solid var(--line);padding:16px}
.shots strong{display:block;margin-bottom:4px}
.tablewrap.sm table{min-width:0}.tablewrap.sm th{width:96px}
/* ── v3 디자인 개선: 섹션/헤딩 구분, 카드, 목록, 표 ── */
.intro{background:linear-gradient(#efe9de,var(--bg));border-bottom:1px solid var(--line);padding:64px 0 48px}
.intro h1{position:relative;padding-bottom:20px;margin-bottom:20px}
.intro h1::after{content:"";position:absolute;left:50%;bottom:0;width:48px;height:3px;margin-left:-24px;background:var(--brass)}
.cases{padding-top:var(--py);border-bottom:1px solid var(--line)}
.section{border-bottom:1px solid var(--line)}
.section--alt{background:var(--surface)}
.section__title{position:relative;padding-bottom:18px;margin-bottom:34px}
.section__title::after{content:"";position:absolute;left:50%;bottom:0;width:40px;height:3px;margin-left:-20px;background:var(--brass)}
.narrow>h3,.section .wrap>h3{font:600 17px/1.5 var(--sans);margin:1.8em 0 .6em;padding-left:12px;border-left:3px solid var(--accent)}
.narrow>ul,.article ul:not(.summary){padding-left:1.3em}
li::marker{color:var(--brass)}
li{margin-bottom:.35em}
/* 아티클: H2 구분선, H3 강조 */
.article{padding-top:36px}
.article h1{padding-bottom:18px;margin-bottom:22px;border-bottom:1px solid var(--line)}
.article h2{margin:2.4em 0 .8em;padding-top:1.3em;border-top:1px solid var(--line);position:relative}
.article h2::before{content:"";position:absolute;top:-1px;left:0;width:48px;height:3px;background:var(--brass)}
.article section:first-of-type h2{margin-top:1.8em}
.article .answer{background:var(--surface);padding:18px 20px;border:1px solid var(--line);border-left:3px solid var(--brass)}
.faq summary h3{border:0;padding:0;margin:0}
.faq summary:hover{background:#faf7f1}
/* 카드 */
.case-card,.rel-card,.guide-card{transition:transform .2s,box-shadow .2s}
.case-card:hover,.rel-card:hover,.guide-card:hover{transform:translateY(-3px);box-shadow:0 10px 24px rgba(28,42,49,.12)}
.case-card__body{border-top:3px solid var(--brass)}
.rel-card__t,.guide-card__t,.case-card__title{color:var(--ink)}
.related{background:#efe9de}
.related .section__title{text-align:left}
.related .section__title::after{left:0;margin-left:0}
/* 표 */
tbody tr:nth-child(even) td{background:#faf7f1}
.tablewrap{box-shadow:0 1px 0 var(--line)}
.tablewrap.sm th{background:#efe9de}
/* 본문 요소 */
.quote{background:var(--surface);padding:18px 22px;border:1px solid var(--line);border-left:3px solid var(--accent);font-size:17px}
.summary{border-left:3px solid var(--accent)}
.photo{background:var(--surface);padding:12px;border:1px solid var(--line);max-width:560px;margin-left:auto;margin-right:auto}
.photo img{max-width:100%}
.steps li{background:var(--bg);padding:14px 14px 16px;border-top:3px solid var(--accent)}
.type-grid div{background:var(--bg);padding:16px 18px;border-top:3px solid var(--brass)}
.split__panel h2{padding-bottom:14px;border-bottom:1px solid rgba(255,255,255,.25)}
.cta{border-top:4px solid var(--brass)}
.btn{transition:background .2s}
.site-footer{border-top:4px solid var(--brass)}
.site-footer__links{padding-bottom:16px;border-bottom:1px solid rgba(255,255,255,.12)}
@media(max-width:700px){.section,.cases{padding:44px 0}.intro{padding:44px 0 36px}.article h2{margin-top:2em}}
.split__img{position:relative;min-height:380px}
.split__img img{position:absolute;inset:0}
@media(max-width:800px){.split__img{min-height:320px}}
.case-grid--in{grid-template-columns:repeat(2,1fr);margin:20px 0}@media(max-width:620px){.case-grid--in{grid-template-columns:1fr}}