:root{--bg:#F5F6F7;--surface:#fff;--surface-2:#ECEFF1;--ink:#16202A;--ink-soft:#4A5661;--ink-faint:#7C8791;--line:#D9DEE2;--accent:#1E4F6F;--accent-dark:#143549;--accent-soft:#E3EDF3;--panel:#0E1A22;--panel-2:#192832;--panel-text:#F2F5F7;--panel-muted:#9FB0BC;--radius:3px;--pill:999px;--maxw:1280px;--gutter:clamp(20px,4vw,48px);--pad:clamp(56px,8vw,104px);--ease:cubic-bezier(.22,1,.36,1);--font:'Pretendard Variable','Pretendard',-apple-system,BlinkMacSystemFont,'Malgun Gothic',sans-serif}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--ink);line-height:1.7;font-size:16px;letter-spacing:-.01em;word-break:keep-all;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--gutter)}
/* header */
.hdr{position:fixed;top:0;left:0;right:0;z-index:50;background:linear-gradient(180deg,rgba(8,14,18,.6),rgba(8,14,18,0));color:#fff;transition:background .3s var(--ease)}
.hdr.solid{background:var(--panel)}
.hdr-in{max-width:1440px;margin:0 auto;padding:16px var(--gutter);display:flex;align-items:center;justify-content:space-between}
.logo{font-weight:900;font-size:1.35rem;letter-spacing:-.02em}
.nav{display:flex;align-items:center;gap:26px;font-size:.92rem;font-weight:600}
.nav a:not(.btn):hover{opacity:.7}
/* buttons */
.btn{display:inline-block;padding:.95rem 1.5rem;min-height:50px;border-radius:var(--radius);font-weight:700;font-size:.92rem;border:1px solid transparent;transition:.25s var(--ease);text-align:center;line-height:1.4;cursor:pointer;font-family:inherit}
.btn-sm{padding:.55rem 1rem;min-height:40px}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-dark)}
.btn-outline{border-color:currentColor;color:inherit;background:transparent}
.btn-outline:hover{background:rgba(255,255,255,.12)}
.btn-light{background:#fff;color:var(--panel)}
.btn-row{display:flex;gap:12px;flex-wrap:wrap}
/* hero */
.hero{position:relative;height:100vh;min-height:560px;overflow:hidden;background:var(--panel);color:#fff}
.hero img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hero::after{content:'';position:absolute;inset:0;background:linear-gradient(100deg,rgba(8,14,18,.8) 0%,rgba(8,14,18,.52) 45%,rgba(8,14,18,.3) 100%);z-index:1}
.hero-text{position:relative;z-index:2;height:100%;max-width:1440px;margin:0 auto;padding:96px var(--gutter) 32px;display:flex;flex-direction:column;justify-content:center;gap:12px}
.eyebrow{align-self:flex-start;font-size:.8rem;font-weight:700;letter-spacing:.12em;padding:.35rem .8rem;border:1px solid rgba(255,255,255,.5);border-radius:var(--pill)}
.hero h1{font-size:clamp(2.4rem,6.5vw,6rem);font-weight:900;line-height:1.05;letter-spacing:-.02em;white-space:nowrap}
.hero-sub{color:rgba(255,255,255,.88);max-width:560px;font-size:1.05rem}
/* sections */
.sec{padding:var(--pad) 0}
.sec-alt{background:var(--surface-2)}
.sec-invert{background:var(--surface)}
.sec-dark{background:var(--panel);color:var(--panel-text)}
.sec-title{font-size:clamp(1.6rem,3.6vw,2.6rem);line-height:1.25;margin-bottom:14px;letter-spacing:-.02em;font-weight:800}
.sec-lead{color:var(--ink-soft);max-width:760px;margin-bottom:36px}
.sec-dark .sec-lead{color:var(--panel-muted)}
.lead{font-size:1.1rem;font-weight:600;max-width:820px;margin-bottom:18px}
.prose p{margin-bottom:16px;max-width:820px;color:var(--ink-soft)}
.prose h2{font-size:clamp(1.3rem,2.6vw,1.8rem);margin:44px 0 14px;font-weight:800;letter-spacing:-.02em}
.prose h3{font-size:1.15rem;margin:26px 0 8px;font-weight:700}
.prose ul{margin:0 0 18px 1.2em;list-style:disc;color:var(--ink-soft)}
.prose li{margin-bottom:6px}
/* grids */
.dgrid{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line)}
.dgrid>*{border-right:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--surface);padding:clamp(22px,3vw,34px);transition:border-color .25s}
.dgrid h3{font-size:1.15rem;margin-bottom:8px;font-weight:700}
.dgrid p{color:var(--ink-soft);font-size:.95rem}
.dgrid .more{display:inline-block;margin-top:14px;font-weight:700;font-size:.9rem;color:var(--accent)}
a.dcell:hover{border-color:var(--accent)}
.sec-dark .dgrid,.sec-dark .dgrid>*{border-color:rgba(255,255,255,.16)}
.sec-dark .dgrid>*{background:transparent}
.sec-dark .dgrid p{color:var(--panel-muted)}
.step-no{font-size:.8rem;font-weight:800;letter-spacing:.12em;color:var(--accent);margin-bottom:8px}
/* case cards (전/후 비교형) */
.cgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.ccard{background:var(--surface);border:1px solid var(--line);display:block;transition:border-color .25s}
.ccard:hover{border-color:var(--accent)}
.ccard.is-hidden{display:none}
.cmp{display:grid;grid-template-columns:1fr 1fr;gap:2px;background:var(--line);position:relative}
.cmp figure{position:relative;aspect-ratio:3/4;overflow:hidden}
.cmp img{width:100%;height:100%;object-fit:cover}
.cmp figcaption{position:absolute;left:8px;top:8px;background:rgba(14,26,34,.85);color:#fff;font-size:.72rem;font-weight:700;padding:.15rem .55rem;border-radius:var(--pill)}
.cbody{padding:16px 18px 20px}
.cbody h3{font-size:1rem;font-weight:700;line-height:1.45;margin-bottom:6px}
.cbody p{font-size:.88rem;color:var(--ink-soft)}
.cmore{text-align:center;margin-top:32px}
/* table */
.tbl{overflow-x:auto;margin:0 0 24px;-webkit-overflow-scrolling:touch}
.tbl table{border-collapse:collapse;width:100%;min-width:560px;background:var(--surface);font-size:.95rem}
.tbl th,.tbl td{border:1px solid var(--line);padding:12px 14px;text-align:left;vertical-align:top}
.tbl th{background:var(--accent-soft);font-weight:700;white-space:nowrap}
.sec-dark .tbl table{background:transparent;color:var(--panel-text)}
.sec-dark .tbl th,.sec-dark .tbl td{border-color:rgba(255,255,255,.2)}
.sec-dark .tbl th{background:var(--panel-2)}
/* faq */
.faq-item{border-bottom:1px solid var(--line);padding:4px 0}
.faq-item summary{cursor:pointer;list-style:none;padding:16px 36px 16px 0;position:relative}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary h3{font-size:1.05rem;font-weight:700;margin:0}
.faq-item summary::after{content:'';position:absolute;right:6px;top:50%;width:9px;height:9px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:translateY(-70%) rotate(45deg);transition:transform .25s var(--ease)}
.faq-item[open] summary::after{transform:translateY(-30%) rotate(-135deg)}
.faq-a{padding:0 0 18px;color:var(--ink-soft);max-width:820px}
.sec-dark .faq-item{border-color:rgba(255,255,255,.2)}
.sec-dark .faq-a{color:var(--panel-muted)}
/* cta */
.cta{display:grid;grid-template-columns:2fr 1fr;gap:20px;align-items:center}
.cta .sec-title{margin-bottom:10px}
/* sub page */
.sub-hero{background:var(--panel);color:#fff;padding:120px 0 52px}
.sub-hero h1{font-size:clamp(1.9rem,4.6vw,3.4rem);font-weight:900;letter-spacing:-.02em;line-height:1.15;margin-bottom:14px}
.sub-hero .answer{color:rgba(255,255,255,.88);max-width:820px;font-size:1.05rem}
.crumb{font-size:.82rem;color:var(--panel-muted);margin-bottom:14px}
.crumb a:hover{color:#fff}
.sub-body{padding:48px 0 var(--pad)}
.photo{margin:26px 0;max-width:620px}
.photo img{width:100%;height:auto;border:1px solid var(--line)}
.photo figcaption{font-size:.85rem;color:var(--ink-faint);margin-top:8px}
.summary{background:var(--accent-soft);padding:22px 26px;margin:28px 0;max-width:820px}
.summary h2{margin:0 0 10px!important;font-size:1.1rem!important}
.summary ul{margin-bottom:0!important}
.quote{border-left:3px solid var(--accent);padding:6px 0 6px 20px;margin:28px 0;max-width:820px}
.quote p{color:var(--ink)!important;font-weight:600;margin-bottom:6px!important}
.quote cite{font-style:normal;font-size:.88rem;color:var(--ink-faint)}
.related{margin-top:56px}
.related h2{font-size:1.4rem;margin-bottom:18px;font-weight:800}
.rgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.rcard{background:var(--surface);border:1px solid var(--line);display:block;transition:border-color .25s}
.rcard:hover{border-color:var(--accent)}
.rcard img{width:100%;aspect-ratio:4/3;object-fit:cover}
.rcard div{padding:14px 16px 18px}
.rcard h3{font-size:1rem;font-weight:700;margin-bottom:4px}
.rcard p{font-size:.85rem;color:var(--ink-soft)}
.upd{font-size:.85rem;color:var(--ink-faint);margin-top:28px}
.steps{counter-reset:s;margin:0 0 20px!important;list-style:none!important}
.steps li{counter-increment:s;padding-left:44px;position:relative;margin-bottom:14px}
.steps li::before{content:counter(s);position:absolute;left:0;top:0;width:30px;height:30px;border-radius:50%;background:var(--accent);color:#fff;font-weight:700;display:grid;place-items:center;font-size:.9rem}
/* footer */
.ftr{background:var(--panel);color:var(--panel-text);padding-top:clamp(48px,7vw,88px);padding-bottom:36px}
.ftr-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:32px;margin-bottom:36px}
.ftr-brand{font-size:1.5rem;font-weight:900}
.ftr-sub{color:var(--panel-muted);font-size:.9rem}
.ftr-h{font-weight:700;margin-bottom:10px;font-size:.9rem}
.ftr li{margin-bottom:6px;font-size:.9rem;color:var(--panel-muted)}
.ftr li a:hover{color:#fff}
.ftr-biz{font-size:.8rem;color:var(--panel-muted);margin-top:6px}
@media (max-width:900px){.dgrid,.cgrid,.rgrid{grid-template-columns:repeat(2,1fr)}.nav a:not(.btn){display:none}.ftr-grid{grid-template-columns:1fr 1fr}.cta{grid-template-columns:1fr}}
@media (max-width:600px){.dgrid,.cgrid,.rgrid{grid-template-columns:1fr}.ftr-grid{grid-template-columns:1fr}.hero{min-height:480px}}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}