/* Swiss / International Style — 12컬럼 그리드 · 산세리프 · 흑/백 + 적색 포인트
   원칙: 위계는 크기·굵기 대비로만, 빨강은 '점·선' 단위로만, 여백이 장식. */
:root{
  --ink:#0a0a0a;--paper:#fff;--red:#ff0000;--gray:#f5f5f5;
  --t1:#111;--t2:#2b2b2b;--t3:#555;--line:#e2e2e2;
  --gut:20px;--mar:clamp(20px,4vw,64px);--secpad:clamp(80px,10vw,152px);
  --ease:cubic-bezier(.2,.7,.2,1);
}
*{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:88px}
body{font-family:"Pretendard Variable",Pretendard,"Helvetica Neue",Helvetica,Arial,"Apple SD Gothic Neo","Noto Sans KR",sans-serif;font-size:17px;line-height:1.7;color:var(--t1);background:var(--paper);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;word-break:keep-all;overflow-wrap:break-word;font-feature-settings:"ss01","tnum"}
a{color:inherit;text-decoration:none;transition:color 200ms linear}
a:hover{color:var(--red)}
.sec-b p a,.faq p a{border-bottom:1px solid currentColor}
:focus-visible{outline:2px solid var(--red);outline-offset:3px}
img{display:block;max-width:100%;height:auto}
ul,ol{list-style:none}
::selection{background:var(--red);color:#fff}
.skip{position:absolute;left:-9999px}.skip:focus{left:var(--mar);top:12px;background:var(--ink);color:#fff;padding:10px 14px;z-index:20}

.grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));column-gap:var(--gut);padding:0 var(--mar);max-width:1520px;margin:0 auto}

/* ── 헤더 ───────────────────────── */
.top{position:sticky;top:0;z-index:10;background:rgba(255,255,255,.82);-webkit-backdrop-filter:saturate(180%) blur(20px);backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid rgba(0,0,0,.08)}
.top .grid{align-items:center;height:68px}
.logo{grid-column:1/6;display:flex;align-items:center;gap:10px;color:var(--ink)}
.logo i{width:10px;height:10px;background:var(--red)}
.logo b{font-size:15px;font-weight:800;letter-spacing:.06em}
.logo span{font-size:13px;color:var(--t3);font-weight:500;padding-left:10px;border-left:1px solid var(--line)}
.logo:hover{color:var(--ink)}
.nav{grid-column:6/13;display:flex;justify-content:flex-end;align-items:center;gap:36px;font-size:14px;font-weight:500;color:var(--t2)}
.nav a{position:relative;padding:6px 0;white-space:nowrap}
.nav a[aria-current]{color:var(--ink)}
.nav a[aria-current]::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--red)}
.nav .nav-cta{color:#fff;background:var(--ink);padding:9px 18px;transition:background 200ms linear}
.nav .nav-cta:hover{background:var(--red);color:#fff}

/* ── 히어로 ─────────────────────── */
.hero .grid{padding-top:clamp(64px,9vw,136px);row-gap:0}
.hero .kicker{grid-column:1/13;display:flex;align-items:center;gap:14px;font-size:12px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--t2);margin-bottom:clamp(24px,3vw,40px)}
.hero .kicker::before{content:"";width:32px;height:2px;background:var(--red)}
.hero h1{grid-column:1/12;font-size:clamp(42px,6.6vw,108px);font-weight:700;line-height:1.04;letter-spacing:-.045em;color:var(--ink)}
.hero .lead{grid-column:1/7;margin-top:clamp(40px,5vw,72px);padding-top:28px;border-top:1px solid var(--ink);font-size:clamp(17px,1.35vw,20px);line-height:1.75;color:var(--t2)}
.hero .facts{grid-column:8/13;margin-top:clamp(40px,5vw,72px);border-top:1px solid var(--ink)}
.hero .facts li{display:grid;grid-template-columns:1fr auto;gap:16px;align-items:baseline;padding:15px 0;border-bottom:1px solid var(--line)}
.hero .facts span{font-size:14px;color:var(--t3)}
.hero .facts b{font-size:clamp(16px,1.3vw,19px);font-weight:600;letter-spacing:-.01em;color:var(--ink);text-align:right}
.hero-img{grid-column:1/13;margin:clamp(56px,7vw,104px) calc(var(--mar) * -1) 0;overflow:hidden;background:var(--gray)}
.hero-img img{width:100%;aspect-ratio:21/9;object-fit:cover;filter:grayscale(1) contrast(1.05)}

/* ── 섹션 ───────────────────────── */
.sec{border-top:1px solid var(--line)}
.hero+.sec{border-top:0}
.sec>.grid{padding-top:var(--secpad);padding-bottom:var(--secpad)}
.sec-h{grid-column:1/5;align-self:start;position:sticky;top:108px;padding-right:var(--gut)}
.sec-h .no{display:flex;align-items:center;gap:10px;font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--red);margin-bottom:20px}
.sec-h .no::after{content:"";width:24px;height:1px;background:currentColor}
.sec-h h2{font-size:clamp(28px,2.7vw,42px);font-weight:700;line-height:1.2;letter-spacing:-.035em;color:var(--ink)}
.sec-b{grid-column:5/13}
.sec-b>*+*{margin-top:40px}
.sec-b>p{font-size:18px;line-height:1.8;color:var(--t2);max-width:62ch}
.sec-b h3{font-size:20px;font-weight:700;letter-spacing:-.02em;line-height:1.4;color:var(--ink)}
.sec-b>h3{margin-top:64px}.sec-b>h3+*{margin-top:16px}
.sec-b p{color:var(--t2)}
.sec.gray{background:var(--gray);border-top:0}
.sec.gray+.sec{border-top:0}

/* 목록 */
ul.list{border-top:1px solid var(--ink)}
ul.list li{position:relative;padding:16px 0 16px 28px;border-bottom:1px solid var(--line);color:var(--t1);line-height:1.6}
ul.list li::before{content:"";position:absolute;left:0;top:28px;width:12px;height:1px;background:var(--red)}
ol.steps{counter-reset:s;border-top:1px solid var(--ink)}
ol.steps li{counter-increment:s;position:relative;padding:24px 0 24px 72px;border-bottom:1px solid var(--line);line-height:1.65}
ol.steps li::before{content:counter(s,decimal-leading-zero);position:absolute;left:0;top:20px;font-size:28px;font-weight:300;letter-spacing:-.03em;color:var(--red);line-height:1.2}
ol.steps li b,ol.steps li h3{color:var(--ink);font-weight:700}
ol.steps li h3{font-size:18px;margin-bottom:4px}
ol.steps li p{margin:0}

/* 다단 카드 */
.cols{display:grid;grid-template-columns:repeat(var(--n,3),minmax(0,1fr));gap:48px var(--gut)}
.cols>div{border-top:1px solid var(--ink);padding-top:20px}
.cols>div>*+*{margin-top:12px}
.cols h3{font-size:19px}
.cols h3 a::after{content:"→";display:inline-block;margin-left:8px;color:var(--red);transition:transform 200ms var(--ease)}
.cols h3 a:hover::after{transform:translateX(4px)}
.cols p{font-size:15.5px;line-height:1.7}
.cols img{width:100%;aspect-ratio:4/3;object-fit:cover;filter:grayscale(1);margin-bottom:8px;transition:filter 400ms var(--ease)}
.cols>div:hover img{filter:none}
.cols ul.list{border-top:0}
.cols ul.list li{font-size:15px;padding:12px 0 12px 24px}
.cols ul.list li::before{top:24px}
p.num{font-size:clamp(44px,4.4vw,64px);font-weight:600;letter-spacing:-.05em;line-height:1;color:var(--ink)}
p.num small{font-size:16px;font-weight:500;letter-spacing:0;color:var(--t3);margin-left:4px}

/* 표 */
.tbl{overflow-x:auto;-webkit-overflow-scrolling:touch}
table.data{width:100%;border-collapse:collapse;font-size:15px;line-height:1.55}
table.data caption{caption-side:top;text-align:left;font-size:14px;font-weight:600;color:var(--t3);letter-spacing:.02em;padding-bottom:14px}
table.data th,table.data td{text-align:left;padding:16px 20px 16px 0;border-bottom:1px solid var(--line);vertical-align:top}
table.data thead th{font-size:13px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--t3);border-bottom:1px solid var(--ink);padding-top:0}
table.data tbody th{font-weight:600;color:var(--ink)}
table.data td{color:var(--t2)}
table.data td.num{color:var(--ink);font-weight:500;white-space:nowrap}
table.data tbody tr{transition:background 200ms linear}
table.data tbody tr:hover{background:rgba(0,0,0,.025)}

/* 사진 — 비대칭 모듈, 흑백 → 호버 컬러 */
.figs{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:var(--gut);counter-reset:f}
.figs figure{grid-column:span 2;counter-increment:f}
.figs figure:first-child{grid-column:span 4;grid-row:span 2}
.figs figure:first-child img{aspect-ratio:auto;height:calc(100% - 40px)}
.figs img{width:100%;aspect-ratio:4/3;object-fit:cover;background:var(--gray);filter:grayscale(1) contrast(1.04);transition:filter 500ms var(--ease)}
.figs figure:hover img{filter:none}
.figs figcaption{display:flex;gap:10px;font-size:13.5px;line-height:1.5;color:var(--t3);padding-top:10px}
.figs figcaption::before{content:"FIG." counter(f,decimal-leading-zero);flex:none;font-weight:600;color:var(--ink)}

/* 강조 섹션 — 검정 대신 연회색 면 */
.sec.dark{background:var(--gray);border-top:0}
.sec.dark+.sec{border-top:0}
.sec.gray+.sec.gray,.sec.gray+.sec.dark,.sec.dark+.sec.gray,.sec.dark+.sec.dark{border-top:1px solid var(--line)}

/* FAQ */
.faq{counter-reset:q;border-top:1px solid var(--ink)}
.faq .qa{counter-increment:q;display:grid;grid-template-columns:72px minmax(0,1fr);padding:32px 0;border-bottom:1px solid var(--line)}
.faq .qa::before{content:"Q" counter(q,decimal-leading-zero);font-size:13px;font-weight:600;color:var(--red);padding-top:4px}
.faq .qa h3,.faq .qa p{grid-column:2}
.faq .qa h3{font-size:clamp(18px,1.5vw,22px);font-weight:700;letter-spacing:-.025em;line-height:1.45;margin-bottom:12px}
.faq .qa p{font-size:16px;line-height:1.8;max-width:64ch}
.sec-b.faq>*+*{margin-top:0}

/* 관련 페이지 인덱스 */
.index{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:48px var(--gut)}
.sec-b.index>*+*{margin-top:0}
.index h3{font-size:12px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--t3);padding-bottom:14px;border-bottom:1px solid var(--ink)}
.index li a{display:flex;justify-content:space-between;align-items:center;padding:16px 0;border-bottom:1px solid var(--line);font-size:16px;font-weight:600;color:var(--ink)}
.index li a::after{content:"→";color:var(--t3);transition:transform 200ms var(--ease),color 200ms linear}
.index li a:hover{color:var(--red)}
.index li a:hover::after{transform:translateX(4px);color:var(--red)}

/* CTA — 검정 포스터 */
.cta{background:var(--gray);color:var(--ink)}
.cta .grid{padding-top:clamp(96px,11vw,168px);padding-bottom:clamp(72px,8vw,120px);align-items:end;row-gap:48px}
.cta h2{grid-column:1/10;font-size:clamp(36px,5.2vw,84px);font-weight:700;line-height:1.08;letter-spacing:-.045em}
.cta h2::before{content:"";display:block;width:14px;height:14px;background:var(--red);margin-bottom:36px}
.cta a{grid-column:10/13;justify-self:end;display:inline-flex;align-items:center;gap:14px;background:var(--ink);color:#fff;padding:20px 30px;font-size:16px;font-weight:700;transition:background 200ms linear,color 200ms linear}
.cta a::after{content:"→";transition:transform 200ms var(--ease)}
.cta a:hover{background:var(--red);color:#fff}
.cta a:hover::after{transform:translateX(4px)}
.btn{display:inline-flex;gap:10px;background:var(--ink);color:#fff;padding:16px 26px;font-weight:700}
.btn:hover{background:var(--red);color:#fff}

/* 푸터 */
.foot{background:#fff;color:var(--ink);font-size:14px;overflow:hidden;border-top:1px solid var(--line)}
.foot .grid{padding-top:72px;padding-bottom:40px;row-gap:56px;border-top:0}
.f-brand{grid-column:1/5}.f-brand b{font-size:15px;font-weight:800;letter-spacing:.06em}
.f-brand p{color:var(--t2);margin-top:12px;max-width:28ch;line-height:1.6}
.f-nav{grid-column:5/13;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--gut)}
.f-nav h2{font-size:12px;font-weight:700;letter-spacing:.12em;color:var(--t3);margin-bottom:16px}
.f-nav li a{display:inline-block;padding:5px 0;color:var(--t1)}
.f-nav li a:hover{color:var(--red)}
.f-biz{grid-column:1/13;font-style:normal;font-size:13px;color:var(--t2);padding-top:24px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:4px 24px}
.f-biz a:hover{color:var(--red)}
.f-mark{font-size:clamp(64px,17.2vw,300px);font-weight:800;letter-spacing:-.065em;line-height:.8;color:#ececec;text-align:center;white-space:nowrap;padding:.02em 0 .06em;user-select:none}

/* 스크롤 등장 */
.rv{opacity:0;transform:translateY(24px);transition:opacity 900ms var(--ease),transform 900ms var(--ease)}
.rv.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;animation:none!important}}

/* 반응형 */
@media (max-width:1024px){
  .sec-h{grid-column:1/13;position:static;margin-bottom:40px}
  .sec-b{grid-column:1/13}
  .hero .lead{grid-column:1/13}.hero .facts{grid-column:1/13;margin-top:40px}
}
@media (max-width:760px){
  body{font-size:16px}
  .logo span{display:none}.logo{grid-column:1/5}
  .nav{grid-column:5/13;gap:14px;font-size:13px}.nav .nav-cta{padding:7px 12px}
  .hero h1{grid-column:1/13}
  .hero-img img{aspect-ratio:4/3}
  .sec-b>p{font-size:16.5px}
  .cols{grid-template-columns:1fr!important;gap:40px}
  .index,.f-nav{grid-template-columns:1fr}
  .figs{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
  .figs figure,.figs figure:first-child{grid-column:span 2;grid-row:auto}
  .figs figure:first-child img{height:auto;aspect-ratio:4/3}
  .figs figure:nth-child(n+2){grid-column:span 1}
  .faq .qa{grid-template-columns:48px minmax(0,1fr);padding:24px 0}
  ol.steps li{padding-left:56px}ol.steps li::before{font-size:22px}
  .cta h2,.cta a,.f-brand,.f-nav{grid-column:1/13}.cta a{justify-self:start}
  table.data{font-size:14px}
}
@media (max-width:480px){.nav a:not(.nav-cta){display:none}}