:root{--bg:#f3f5f7;--card:#fff;--ink:#14233a;--mute:#56657a;--line:#d6dde6;--acc:#d9541e;--acc2:#b8430f;--soft:#e8edf3;
--sans:'Pretendard',-apple-system,BlinkMacSystemFont,'Malgun Gothic','Apple SD Gothic Neo',sans-serif;--mono:'JetBrains Mono',Consolas,monospace;
--wrap:1240px;--gap:clamp(60px,8vw,120px);--pad:clamp(20px,5vw,64px);--shadow:0 1px 2px rgba(20,35,58,.06),0 8px 24px -12px rgba(20,35,58,.18)}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;overflow-x:hidden;scroll-behavior:smooth;scroll-padding-top:84px}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.75 var(--sans);word-break:keep-all;overflow-wrap:break-word;overflow-x:hidden;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}a{color:inherit;text-decoration:none}
h1,h2,h3,p,ul,ol,figure,table,blockquote{margin:0}ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--acc);outline-offset:3px}
.wrap{max-width:var(--wrap);margin-inline:auto;padding-inline:var(--pad)}
section{padding-block:var(--gap)}
section.alt{background:#fff;border-block:1px solid var(--line)}
.center{text-align:center}.center .label{justify-content:center}.center .row{justify-content:center}.center p{margin-inline:auto;max-width:52ch}
/* 제목 위계: label > h1 > h2 > h3 */
.label{font:500 12px var(--mono);letter-spacing:.28em;text-transform:uppercase;color:var(--acc);display:flex;align-items:center;gap:10px;margin-bottom:16px}
.label::before{content:"";width:24px;height:2px;background:var(--acc)}
h1{font-size:clamp(36px,5.6vw,68px);line-height:1.12;letter-spacing:-.035em;font-weight:800}
h2{font-size:clamp(25px,3.2vw,40px);line-height:1.28;letter-spacing:-.025em;font-weight:800;margin-bottom:16px}
h3{font-size:18px;line-height:1.45;letter-spacing:-.01em;font-weight:700;margin-bottom:8px}
.sh{margin-bottom:clamp(28px,4vw,48px);max-width:760px}.sh h2{margin-bottom:12px}.sh p{font-size:17px}
.lead{font-size:clamp(17px,1.6vw,20px);max-width:60ch}
.mute{color:var(--mute)}.dark .mute{color:#a9b8cc}
/* header */
.hd{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.hd .wrap{height:72px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{font-weight:800;font-size:16px;letter-spacing:-.02em;display:flex;align-items:center;gap:10px;line-height:1.25;min-width:0}
.brand i{width:12px;height:12px;background:var(--acc);flex:none}
.brand small{display:block;font:500 11px var(--sans);color:var(--mute);letter-spacing:0}
.nav{display:flex;align-items:center;gap:clamp(14px,2.6vw,34px);flex:none}
.nav a{font:500 12px var(--mono);letter-spacing:.12em;color:var(--mute);transition:color .15s}.nav a:hover{color:var(--acc)}
.nav .cta{color:#fff;background:var(--ink);padding:11px 18px;letter-spacing:.04em;font-family:var(--sans);font-weight:700;font-size:14px}.nav .cta:hover{background:var(--acc);color:#fff}
/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:52px;padding:0 30px;font:700 15px var(--sans);letter-spacing:-.01em;border:2px solid var(--ink);background:transparent;color:var(--ink);cursor:pointer;transition:background .15s,color .15s,border-color .15s,transform .15s}
.btn.p{background:var(--acc);border-color:var(--acc);color:#fff}.btn.p:hover{background:var(--acc2);border-color:var(--acc2)}
.btn.o:hover{background:var(--ink);color:#fff}.dark .btn.o{border-color:#fff;color:#fff}.dark .btn.o:hover{background:#fff;color:var(--ink)}
.btn:active{transform:translateY(1px)}
.row{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
/* hero */
.hero{padding-block:clamp(36px,6vw,88px)}
.hero .g{display:grid;grid-template-columns:1.1fr 1fr;gap:clamp(28px,5vw,72px);align-items:center}
.hero figure img{width:100%;aspect-ratio:4/5;object-fit:cover;box-shadow:var(--shadow)}
.hero .ans{margin-top:22px}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
.chips a{font-size:14px;font-weight:600;padding:8px 14px;border:1px solid var(--line);background:#fff;border-radius:99px;transition:.15s}.chips a:hover{border-color:var(--acc);color:var(--acc)}
.dark{background:var(--ink);color:#fff}.dark .label{color:#ff9a6b}.dark .label::before{background:#ff9a6b}
/* tables */
.tw{overflow-x:auto;margin:20px 0;border:1px solid var(--line);background:#fff;-webkit-overflow-scrolling:touch}
table{width:100%;border-collapse:collapse;min-width:520px}
th,td{padding:14px 18px;border-bottom:1px solid var(--line);text-align:left;font-size:15px;vertical-align:top}
th{background:var(--soft);font-weight:700;white-space:nowrap}tbody tr:last-child td,tbody tr:last-child th{border-bottom:0}
tbody tr:nth-child(even) td{background:#fafbfc}
/* grids/cards */
.g2{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,5vw,72px);align-items:start}
.g3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.box{background:#fff;border:1px solid var(--line);border-top:3px solid var(--acc);padding:26px}
.dark .box{background:#1c3050;border-color:#2c4468;border-top-color:var(--acc)}
.sym{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);padding:26px;transition:.18s;box-shadow:var(--shadow)}
.sym:hover{border-color:var(--acc);transform:translateY(-3px)}
.sym .tag{font:500 11px var(--mono);letter-spacing:.2em;color:var(--acc);margin-bottom:12px}
.sym p{color:var(--mute);font-size:15px;flex:1}
.sym .go{margin-top:18px;font-weight:700;font-size:14px;display:flex;align-items:center;gap:6px}.sym .go::after{content:"→";transition:transform .15s}.sym:hover .go::after{transform:translateX(4px)}
.sv{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);transition:.18s;box-shadow:var(--shadow);overflow:hidden}.sv:hover{border-color:var(--acc);transform:translateY(-3px)}
.sv img{width:100%;aspect-ratio:4/3;object-fit:cover}.sv div{padding:22px}.sv p{color:var(--mute);font-size:15px}
.cases{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cc{display:block;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);transition:.18s}.cc:hover{border-color:var(--acc);transform:translateY(-3px)}.cc.hide{display:none}
.ba{display:grid;grid-template-columns:1fr 1fr;gap:2px;position:relative;background:var(--line)}
.ba img{width:100%;aspect-ratio:3/4;object-fit:cover}
.ba b{position:absolute;bottom:8px;font:500 11px var(--mono);letter-spacing:.14em;background:var(--ink);color:#fff;padding:3px 8px}
.ba b:nth-of-type(1){left:8px}.ba b:nth-of-type(2){right:8px;background:var(--acc)}
.cc .t{padding:18px 20px 20px}.cc .t h3{margin:0 0 6px}.cc .t p{font-size:14px;color:var(--mute);line-height:1.6}
.more{text-align:center;margin-top:36px}
/* article: 본문 안에서 h2는 구분선으로 분리 */
.art{max-width:820px}.art p{margin-bottom:16px}
.art h2{font-size:clamp(22px,2.6vw,30px);margin:56px 0 18px;padding-top:32px;border-top:1px solid var(--line)}
.art>h2:first-child,.art>.sh+h2{margin-top:0;padding-top:0;border-top:0}
.art h3{font-size:17px}
.ck{margin:0 0 20px}.ck li{padding:11px 0 11px 26px;position:relative;border-bottom:1px solid var(--line)}.ck li:last-child{border-bottom:0}
.ck li::before{content:"";position:absolute;left:2px;top:21px;width:8px;height:8px;background:var(--acc)}
.dark .ck li{border-color:#2c4468}
.fig{margin:28px 0}.fig img{width:100%;max-height:640px;object-fit:cover;box-shadow:var(--shadow)}.fig figcaption{font:500 12px var(--mono);color:var(--mute);margin-top:10px;letter-spacing:.08em}
.crumb{font:500 12px var(--mono);color:var(--mute);letter-spacing:.08em;padding-top:26px}.crumb a:hover{color:var(--acc)}
.quote{border-left:4px solid var(--acc);background:var(--soft);padding:20px 24px;margin:28px 0;font-size:18px;line-height:1.65}.quote span{display:block;font:500 12px var(--mono);color:var(--mute);margin-top:10px}
.mod{font:500 12px var(--mono);color:var(--mute);margin-top:32px}.dark .mod{color:#a9b8cc}
/* faq */
details{background:#fff;border:1px solid var(--line);margin-bottom:10px;transition:border-color .15s}details[open]{border-color:var(--acc)}
summary{cursor:pointer;padding:18px 22px;min-height:60px;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:14px}
summary h3{margin:0;font-size:16px}
summary::-webkit-details-marker{display:none}summary::after{content:"+";font:400 24px var(--mono);color:var(--acc);flex:none}details[open] summary::after{content:"−"}
details p{padding:0 22px 22px;margin:0;color:var(--ink)}
.faqbox{color:var(--ink)}
/* footer */
.ft{background:#0d1727;color:#b7c3d4;padding-block:52px;font-size:14px;line-height:1.8}.ft a:hover{color:#fff}
.ft .fl{display:flex;flex-wrap:wrap;gap:10px 24px;margin-bottom:26px;padding-bottom:22px;border-bottom:1px solid #22344f;font:500 12px var(--mono);letter-spacing:.08em}
.ft p{margin:0 0 2px}
/* floating */
.fl-cta{position:fixed;right:18px;bottom:18px;z-index:40;background:var(--acc);color:#fff;font-weight:700;padding:15px 22px;box-shadow:0 8px 22px rgba(20,35,58,.3);transition:background .15s}
.fl-cta:hover{background:var(--acc2)}
@media(max-width:1024px){.cases{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(2,1fr)}}
@media(max-width:860px){.hero .g,.g2{grid-template-columns:1fr}.nav a:not(.cta){display:none}.hero figure img{aspect-ratio:4/3}}
/* 모바일 */
@media(max-width:640px){
 body{font-size:16px;padding-bottom:calc(76px + env(safe-area-inset-bottom))}
 section{padding-block:56px}
 .hd .wrap{height:60px}.brand{font-size:14px}.brand small{display:none}.nav .cta{padding:10px 14px;font-size:13px}
 .g3,.cases{grid-template-columns:1fr}
 .row{flex-direction:column;gap:10px}.row .btn,.more .btn{width:100%;min-height:56px;font-size:16px}
 .hero{padding-block:28px 48px}.chips{gap:6px}.chips a{font-size:13px;padding:8px 12px}
 .sym,.box{padding:22px}
 .art h2{margin-top:44px;padding-top:26px}
 .tw{margin-inline:calc(var(--pad)*-1);border-inline:0}
 .fl-cta{left:0;right:0;bottom:0;text-align:center;padding:18px 20px calc(18px + env(safe-area-inset-bottom));font-size:16px;box-shadow:0 -4px 16px rgba(20,35,58,.18)}
 summary{padding:16px 18px}details p{padding:0 18px 20px}
 .quote{padding:16px 18px;font-size:17px}
}

/* 모바일 표: 행을 카드로 재배치 */
@media(max-width:640px){
 .tw{border:0;background:none;overflow:visible;margin-inline:0}
 table.rs{min-width:0}table.rs thead{display:none}
 table.rs,table.rs tbody,table.rs tr,table.rs td{display:block;width:100%}
 table.rs tr{background:#fff;border:1px solid var(--line);border-left:3px solid var(--acc);margin-bottom:12px}
 table.rs td{display:flex;gap:14px;padding:11px 16px;border-bottom:1px solid var(--line);background:#fff!important}
 table.rs td:last-child{border-bottom:0}
 table.rs td::before{content:attr(data-label);flex:0 0 96px;font:500 12px var(--mono);color:var(--mute);padding-top:3px}
 table.rs td:first-child{font-weight:700;background:var(--soft)!important}
 table.kv{min-width:0}table.kv,table.kv tbody,table.kv tr,table.kv th,table.kv td{display:block;width:100%}
 table.kv tr{border-bottom:1px solid var(--line)}table.kv tr:last-child{border-bottom:0}
 table.kv th{border:0;padding:10px 16px 0;background:none;font:500 12px var(--mono);color:var(--mute)}table.kv td{border:0;padding:2px 16px 12px;background:#fff!important}
}

/* 시공사례 섹션(다크) + 대표 카드 */
.dark .cc{color:var(--ink);box-shadow:none;border-color:transparent}
.cc .t{display:flex;flex-direction:column}.cc .tag{font:500 11px var(--mono);letter-spacing:.16em;color:var(--acc);margin-bottom:8px}
.cc .go{margin-top:14px;font-weight:700;font-size:14px;display:flex;align-items:center;gap:6px}.cc .go::after{content:"→";transition:transform .15s}.cc:hover .go::after{transform:translateX(4px)}
.cc.feat{grid-column:1/-1;display:grid;grid-template-columns:1.35fr 1fr;background:#fff}
.cc.feat .ba img{aspect-ratio:4/5}
.cc.feat .t{justify-content:center;padding:clamp(24px,4vw,56px)}.cc.feat h3{font-size:clamp(24px,2.6vw,34px);letter-spacing:-.025em;margin-bottom:12px}.cc.feat .t p{font-size:16px}
.bn{display:block;min-width:0}.bn .b1{font-weight:800}.bn .b2{font-weight:800}
.process-box{background:var(--bg)}
section.alt .box{background:var(--bg)}
@media(max-width:860px){.cc.feat{grid-template-columns:1fr}.cc.feat .ba img{aspect-ratio:3/4}}
@media(max-width:640px){
 .brand{gap:9px;min-width:0;flex:1}.brand i{align-self:flex-start;margin-top:6px}
 .bn{line-height:1.2}.bn .b1{display:block;font-size:17px;letter-spacing:-.03em}
 .bn .b2{display:block;font-size:11.5px;font-weight:500;color:var(--mute);letter-spacing:-.02em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
 .hd .wrap{gap:10px}.nav .cta{padding:10px 13px;white-space:nowrap}
}
@media(max-width:360px){.bn .b2{font-size:10.5px}.nav .cta{padding:9px 10px;font-size:12px}}
.cc.feat:not(:first-child) .ba img{aspect-ratio:16/10}
.cc[style*="span 2"] .ba img{aspect-ratio:4/3}