:root{--tk:61px;--blue:#2339c9;--blue-d:#1a2b9a;--blue-l:#dfe4fb;--ink:#0c1220;--ink2:#2a3345;--steel:#5a6376;--paper:#ece9e2;--card:#f7f5f0;--line:#c9c5ba;--y:#ffd23f;--w:1160px}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:"Apple SD Gothic Neo","Noto Sans KR","Malgun Gothic",system-ui,sans-serif;background:var(--paper);color:var(--ink);line-height:1.8;font-size:17px;word-break:keep-all;overflow-wrap:break-word;overflow-x:hidden}
img{display:block;max-width:100%;height:auto}
a{color:var(--blue-d)}
.wrap{width:min(var(--w),100% - 40px);margin-inline:auto}
:focus-visible{outline:3px solid var(--y);outline-offset:3px;box-shadow:0 0 0 6px var(--ink)}
.skip{position:absolute;left:-999px;top:0;background:#fff;padding:8px 14px;z-index:99}.skip:focus{left:8px}

/* 스크롤 = 사다리 오르기 */
.climb{position:fixed;left:14px;top:50%;height:56vh;width:22px;transform:translateY(-50%);z-index:40;pointer-events:none;display:none;
 background:linear-gradient(90deg,var(--ink) 0 3px,transparent 3px 19px,var(--ink) 19px 22px),repeating-linear-gradient(to bottom,transparent 0 17px,var(--ink) 17px 20px);background-blend-mode:normal;opacity:.55;
 -webkit-mask:linear-gradient(to bottom,transparent,#000 8% 92%,transparent);mask:linear-gradient(to bottom,transparent,#000 8% 92%,transparent)}
.climb i{position:absolute;left:-5px;width:32px;height:32px;border-radius:50%;background:var(--y);border:3px solid var(--ink);bottom:calc(var(--p,0)*(100% - 32px));transition:bottom .1s linear}
@media(min-width:1260px){.climb{display:block}}

/* header */
.hd{background:var(--blue);position:sticky;top:0;z-index:50}
.hd .wrap{display:flex;align-items:center;justify-content:space-between;height:68px;gap:16px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:#fff;font-weight:900;font-size:18px;letter-spacing:-.01em}
.brand img{width:34px;height:34px}
.brand small{font-weight:700;color:var(--y);font-size:10.5px;letter-spacing:.3em;display:block;line-height:1.1}
.nav{display:flex;gap:2px;align-items:center}
.nav a{text-decoration:none;padding:8px 14px;font-size:15px;color:#dfe4fb;font-weight:600}
.nav a:hover,.nav a[aria-current=page]{color:#fff;box-shadow:inset 0 -3px 0 var(--y)}
.nav .tel{background:var(--y);color:var(--ink);font-weight:900;margin-left:10px;border-radius:999px;padding:8px 20px;box-shadow:none}
.nav .tel:hover{background:#fff;color:var(--ink);box-shadow:none}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:56px;padding:0 30px;border-radius:999px;font-weight:900;text-decoration:none;font-size:17px;border:3px solid var(--ink);cursor:pointer;font-family:inherit;transition:transform .15s,box-shadow .15s,background .15s;box-shadow:4px 4px 0 var(--ink)}
.btn:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--ink)}
.btn:active{transform:translate(2px,2px);box-shadow:1px 1px 0 var(--ink)}
.btn-y{background:var(--y);color:var(--ink)}
.btn-w{background:#fff;color:var(--ink)}
.btn-cu{background:var(--blue);color:#fff}
.btn-dark{background:var(--ink);color:#fff;box-shadow:4px 4px 0 var(--blue)}.btn-dark:hover{box-shadow:6px 6px 0 var(--blue)}
.btn-o{background:transparent;color:var(--ink)}

/* HERO: 코발트 풀블리드 + 거대 세로 타이틀 */
.hero{background:var(--blue);color:#fff;position:relative;padding:0}
.hero::before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(to right,transparent 0 119px,#ffffff14 119px 120px);pointer-events:none}
.hero .wrap{position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center;padding:28px 0;min-height:calc(100vh - 68px - var(--tk));min-height:calc(100svh - 68px - var(--tk))}
.ht{padding-bottom:0}
.eyebrow{font-size:12.5px;letter-spacing:.3em;color:var(--y);font-weight:800;margin-bottom:18px}
h1{font-weight:900;letter-spacing:-.06em;color:#fff}
h1 span{display:block}
h1.big{font-size:clamp(60px,min(12.4vw,16svh),176px);line-height:.92}
h1.mid{font-size:clamp(46px,min(7.4vw,12svh),104px);line-height:1}
h1 span:last-child{color:var(--y)}
.lead{margin-top:clamp(12px,2.6svh,28px);font-size:clamp(15.5px,2.1svh,18px);color:#e5e9fc;max-width:36em}
.lead strong{color:#fff;box-shadow:inset 0 -.45em 0 #ffffff30}
.cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:clamp(16px,3.4svh,30px)}
.hp{position:relative;align-self:center;max-width:470px;justify-self:end;width:100%;z-index:3}
.hp .fig{max-width:none}
.hp img{width:auto;max-width:100%;max-height:calc(100svh - 68px - var(--tk) - 120px);margin-inline:auto 0;aspect-ratio:3/4;object-fit:cover;border:4px solid var(--ink);box-shadow:16px 16px 0 var(--y);background:var(--blue-d)}
.hero .hp figcaption{color:#fff;opacity:.9;margin-top:22px;font-size:13.5px;line-height:1.5}
.stk{position:absolute;left:-58px;top:46px;width:128px;height:128px;border-radius:50%;background:var(--y);color:var(--ink);border:3px solid var(--ink);display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;font-size:12px;line-height:1.3;font-weight:800;transform:rotate(-14deg);padding:8px;box-shadow:4px 4px 0 var(--ink)}
.stk b{font-size:26px;line-height:1;letter-spacing:-.04em;font-weight:900}
.facts{list-style:none;display:flex;flex-wrap:wrap;gap:0 28px;margin-top:clamp(14px,3svh,30px);border-top:2px solid #ffffff40;padding-top:14px}
.facts li{font-size:13px;color:#cdd5f7}
.facts b{display:block;font-size:26px;color:#fff;letter-spacing:-.03em}
.bc{font-size:13.5px;color:#cdd5f7;margin-bottom:14px}
.bc a{text-decoration:none;color:#cdd5f7}.bc a:hover{color:#fff;text-decoration:underline}
.bc span{margin:0 6px}

/* 흐르는 띠 */
.tick{background:var(--y);color:var(--ink);border-block:3px solid var(--ink);overflow:hidden;white-space:nowrap;position:relative;z-index:2}
.tick div{display:inline-block;padding:12px 0;animation:tk 38s linear infinite;font-weight:900;font-size:17px;letter-spacing:-.01em}
.tick span{display:inline-block;padding:0 26px}
.tick span::after{content:"▲";margin-left:var(--tk);font-size:12px}
@keyframes tk{to{transform:translateX(-50%)}}

/* sections */
section{padding:92px 0}
.hero+.tick+section{padding-top:92px}
.alt{background:var(--card)}
.dark{background:var(--ink);color:#e7eaf2}
.blue{background:var(--blue);color:#fff}
h2{font-size:clamp(30px,4.4vw,var(--tk));line-height:1.12;letter-spacing:-.05em;font-weight:900;margin-bottom:18px}
h2 .no{display:flex;align-items:center;gap:12px;font-size:12.5px;letter-spacing:.28em;color:var(--blue);font-weight:800;margin-bottom:14px}
h2 .no b{font-size:clamp(64px,9vw,120px);line-height:.8;letter-spacing:-.06em;color:transparent;-webkit-text-stroke:2px var(--blue);font-weight:900}
.dark h2 .no,.blue h2 .no{color:var(--y)}
.dark h2 .no b{-webkit-text-stroke-color:var(--y)}
h3{font-size:19px;letter-spacing:-.02em;margin-bottom:6px}
.sub{color:var(--steel);max-width:42em;margin-bottom:38px;font-size:17.5px}
.dark .sub{color:#9aa4ba}
.dark a{color:var(--y)}
p+p{margin-top:14px}
section p strong{background:linear-gradient(transparent 60%,#ffd23f99 60%)}
.dark p strong{background:none;color:var(--y)}

/* 시공사례: 어긋난 카드 */
.cases{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;align-items:start}
.case{display:block;text-decoration:none;color:var(--ink);background:var(--card);border:3px solid var(--ink);box-shadow:8px 8px 0 var(--ink);transition:transform .15s,box-shadow .15s;position:relative}
.alt .case{background:#fff}
.case:nth-child(2){margin-top:56px}
.case:hover{transform:translate(-4px,-4px);box-shadow:12px 12px 0 var(--blue)}
.case img{width:100%;aspect-ratio:3/4;object-fit:cover;border-bottom:3px solid var(--ink)}
.case div{padding:16px 18px 20px}
.case b{display:block;font-size:18px;line-height:1.35;letter-spacing:-.02em}
.case span{display:block;font-size:14px;color:var(--steel);margin-top:6px}
.more{margin-top:56px}

/* split */
.split{display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:center}
.split.rev .fig{order:2}
.fig img{width:100%;aspect-ratio:3/4;object-fit:cover;border:4px solid var(--ink);background:var(--blue-l);box-shadow:14px 14px 0 var(--blue)}
.fig{max-width:460px}
.split .fig:nth-child(odd){transform:rotate(-1.5deg)}
.split.rev .fig{transform:rotate(1.5deg)}
.dark .fig img{border-color:#fff;box-shadow:14px 14px 0 var(--y)}
.fig figcaption{font-size:13.5px;color:var(--steel);margin-top:22px;line-height:1.5}
.dark .fig figcaption{color:#9aa4ba}
.tri{display:grid;grid-template-columns:repeat(3,1fr);gap:34px;margin:36px 0 46px}
.tri .fig{max-width:none;transform:none}
.tri .fig:nth-child(2){margin-top:42px}

/* table / list */
.tbl{width:100%;border-collapse:collapse;background:#fff;font-size:16px;margin-top:22px;color:var(--ink);border:3px solid var(--ink)}
.tbl caption{text-align:left;font-weight:800;padding:0 0 10px;color:var(--steel);font-size:14px}
.dark .tbl caption{color:#9aa4ba}
.tbl th,.tbl td{border:1px solid var(--line);padding:14px 16px;text-align:left;vertical-align:top}
.tbl th{background:var(--blue-l);font-weight:900;width:30%}
.tbl thead th{background:var(--ink);color:var(--y)}
.tblw{overflow-x:auto}
.chk{list-style:none;display:grid;gap:12px;margin-top:22px;counter-reset:c}
.chk li{padding:16px 18px 16px 70px;background:#fff;border:3px solid var(--ink);position:relative;counter-increment:c;color:var(--ink);box-shadow:5px 5px 0 var(--ink)}
.chk li::before{content:counter(c,decimal-leading-zero);position:absolute;left:0;top:0;bottom:0;width:var(--tk);background:var(--y);border-right:3px solid var(--ink);display:flex;align-items:center;justify-content:center;font-weight:900;font-size:17px}
.chk b{display:block;font-size:17.5px}
.note{font-size:14px;color:var(--steel);margin-top:14px}

/* 진행 과정 = 진짜 사다리 (레일 2줄 + 발판) */
.rail{list-style:none;position:relative;margin-top:36px;padding:0 0 0 118px;counter-reset:s;max-width:720px}
.rail::before,.rail::after{content:"";position:absolute;top:-14px;bottom:-14px;width:8px;background:var(--ink);border-radius:4px}
.rail::before{left:0}.rail::after{left:80px}
.rail li{position:relative;padding:6px 0 38px;counter-increment:s;min-height:84px}
.rail li::before{content:counter(s,decimal-leading-zero);position:absolute;left:-118px;top:10px;width:88px;height:34px;background:var(--y);border:3px solid var(--ink);font-weight:900;text-align:center;line-height:28px;font-size:16px;letter-spacing:.04em}
.rail li h3{font-size:22px}
.rail li p{color:var(--steel);margin-top:2px}
.dark .rail::before,.dark .rail::after{background:#fff}
.dark .rail li::before{border-color:#fff}
.dark .rail li p{color:#9aa4ba}
.blue .rail::before,.blue .rail::after{background:#fff}

/* 시공사례 페이지 갤러리 */
.g{display:grid;grid-template-columns:repeat(2,1fr);gap:64px 48px}
.g article{display:grid;grid-template-columns:minmax(0,250px) 1fr;gap:24px;align-items:start;scroll-margin-top:90px}
.g article:nth-child(even){margin-top:60px}
.g img{width:100%;aspect-ratio:3/4;object-fit:cover;border:3px solid var(--ink);box-shadow:8px 8px 0 var(--y);background:var(--blue-l)}
.g .tag{display:inline-block;font-size:11.5px;color:#fff;background:var(--blue);font-weight:900;letter-spacing:.16em;padding:2px 10px;margin-bottom:8px}
.g h3{font-size:22px;letter-spacing:-.03em}

/* faq */
.faq details{background:#fff;border:3px solid var(--ink);margin-bottom:14px;box-shadow:5px 5px 0 var(--ink)}
.faq summary{list-style:none;cursor:pointer;padding:20px 66px 20px 22px;font-weight:900;font-size:18px;position:relative;min-height:60px;line-height:1.45;color:var(--ink);letter-spacing:-.02em}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:16px;top:50%;transform:translateY(-50%);width:36px;height:36px;border-radius:50%;background:var(--y);border:3px solid var(--ink);color:var(--ink);font-size:24px;line-height:29px;text-align:center;font-weight:900}
.faq details[open] summary::after{content:"−";background:var(--blue);color:#fff}
.faq details[open] summary{border-bottom:3px solid var(--ink);background:var(--blue-l)}
.faq .a{padding:18px 22px 22px;color:var(--ink2)}
.js .faq .x{display:none}
.js .faq.open .x{display:block}
.faq-more{margin-top:18px}
.faq h3{display:contents}

/* CTA */
.ctab{background:var(--y);color:var(--ink);padding:72px 0;border-top:3px solid var(--ink)}
.ctab .wrap{display:flex;gap:30px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.ctab h2{margin:0;font-size:clamp(28px,4vw,46px);max-width:15em}
.ctab p{margin-top:8px;font-weight:600}
.ctab .btn-dark{background:var(--ink);box-shadow:4px 4px 0 var(--blue)}
.ctab .btn-line{background:#fff;color:var(--ink)}

/* 상담 */
.ways{display:grid;grid-template-columns:repeat(2,1fr);gap:28px;margin-top:30px}
.way{background:#fff;border:3px solid var(--ink);padding:30px;box-shadow:10px 10px 0 var(--blue)}
.way:nth-child(2){box-shadow:10px 10px 0 var(--y)}
.way b{font-size:15px;letter-spacing:.1em;color:var(--blue)}
.way .big{display:block;font-size:clamp(28px,3.6vw,40px);font-weight:900;letter-spacing:-.05em;margin:6px 0 18px}
.way .row{display:flex;gap:12px;flex-wrap:wrap}
#copymsg{font-size:14px;color:var(--blue-d);min-height:22px;margin-top:12px;font-weight:700}

/* footer */
.ft{background:var(--ink);color:#9aa4ba;padding:56px 0 100px;font-size:14.5px;line-height:1.95}
.ft b{color:#fff;font-size:17px}
.ft a{color:var(--y)}
.ft .cols{display:grid;grid-template-columns:1.2fr 1fr;gap:30px}
.ft ul{list-style:none;display:flex;gap:18px;flex-wrap:wrap}
.ft .upd{margin-top:22px;border-top:1px solid #ffffff22;padding-top:14px;font-size:13px}

.mbar{display:none}

@media(max-height:1000px) and (min-width:901px){.facts{display:none}}
@media(max-height:820px) and (min-width:901px){.hp figcaption{display:none}.hp img{max-height:calc(100svh - 68px - var(--tk) - 70px)}h1.big{font-size:clamp(56px,min(12.4vw,14svh),176px)}.eyebrow{margin-bottom:10px}.cta .btn{min-height:50px}}
@media(max-width:900px){
 .hero .wrap{grid-template-columns:1fr;gap:18px;padding:22px 0 26px;min-height:calc(100svh - 68px - var(--tk) - 59px)}
 .ht{padding-bottom:0}
 .hp{justify-self:center;max-width:360px}
 .hp img{margin-inline:auto;max-height:30svh}
 .hp figcaption{display:none}
 .facts{display:none}
 .stk{left:-14px;top:18px;width:108px;height:108px;font-size:11px}.stk b{font-size:22px}
 .hero+.tick+section{padding-top:80px}
 .cases{grid-template-columns:1fr 1fr}
 .case:nth-child(2){margin-top:0}.case:nth-child(3){margin-top:56px}
 .split{grid-template-columns:1fr;gap:42px}.split.rev .fig{order:0}
 .fig{margin-inline:auto}
 .g{grid-template-columns:1fr}.g article:nth-child(even){margin-top:0}
 .ways{grid-template-columns:1fr}
 .ft .cols{grid-template-columns:1fr}
 .tri{grid-template-columns:1fr 1fr}.tri .fig:nth-child(2){margin-top:0}.tri .fig:nth-child(3){margin-top:36px}
}
@media(max-width:640px){
 .hero .wrap{display:flex;flex-direction:column;gap:18px;padding:18px 0 22px;min-height:calc(100svh - 68px - var(--tk) - 59px)}
 .ht{position:static}
 .eyebrow{display:none}
 .hp{position:relative;width:100%;max-width:none;flex:1 1 auto;min-height:110px;justify-self:auto;align-self:stretch}
 .hp .fig{position:absolute;inset:0 6px 8px 0;max-width:none}
 .hp img{width:100%;height:100%;max-height:none;aspect-ratio:auto;object-fit:cover;object-position:50% 30%;margin:0;border:3px solid var(--ink);box-shadow:6px 6px 0 var(--y);opacity:1}
 .hp figcaption{display:none}
 .stk{display:flex;left:auto;right:10px;top:-22px;width:84px;height:84px;font-size:9.5px;padding:4px}.stk b{font-size:17px}
 .hero{overflow:hidden}
 h1.big{font-size:clamp(60px,min(21vw,13svh),100px)}
 h1.mid{font-size:clamp(40px,min(12vw,9svh),60px)}
 .lead{font-size:15px;line-height:1.6;margin-top:12px}
 .cta{gap:10px;margin-top:16px}
 .cta .btn{flex:1 1 calc(50% - 5px);min-height:50px;padding:0 12px;font-size:16px}

 body{font-size:16.5px}
 .nav a:not(.tel){display:none}
 .nav .tel{margin:0}
 section{padding:64px 0}
 h1.big{font-size:clamp(72px,24vw,110px)}
 h1.mid{font-size:clamp(44px,13vw,64px)}
 .cases{grid-template-columns:1fr;gap:22px}
 .case:nth-child(n){margin-top:0}
 .tri{grid-template-columns:1fr}.tri .fig:nth-child(n){margin-top:0}
 .g article{grid-template-columns:112px 1fr;gap:16px}
 .g h3{font-size:19px}
 .facts{gap:0 20px}
 .btn{width:100%}
 .ctab .btn{flex:1 1 100%}
 .nav .tel{width:auto;min-height:0}
 .tbl th{width:36%}
 .tbl th,.tbl td{padding:10px}
 .rail{padding-left:96px}
 .rail::after{left:60px}
 .rail li::before{left:-96px;width:68px;font-size:14px}
 .chk li{padding-left:64px}
 .fig img,.hp img{box-shadow:9px 9px 0 var(--y)}
 .fig img{box-shadow:9px 9px 0 var(--blue)}.dark .fig img{box-shadow:9px 9px 0 var(--y)}
 .mbar{display:grid;grid-template-columns:1fr 1fr;position:fixed;left:0;right:0;bottom:0;z-index:60;background:var(--ink);border-top:3px solid var(--ink)}
 .mbar a{display:flex;align-items:center;justify-content:center;min-height:56px;font-weight:900;color:#fff;text-decoration:none;font-size:17px}
 .mbar a:first-child{background:var(--y);color:var(--ink)}
}
@media(max-width:640px) and (max-height:720px){
 .hp{display:none}
 .eyebrow{display:none}
 .hero .wrap{padding:14px 0 16px}
 h1.big{font-size:clamp(52px,min(21vw,11svh),100px)}
 h1.mid{font-size:clamp(36px,min(11vw,8svh),56px)}
 .lead{font-size:14.5px;line-height:1.55;margin-top:10px}
 .cta{margin-top:12px}.cta .btn{min-height:46px;font-size:15px}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}.tick div{animation:none}}