@font-face {
  font-family: 'Pretendard Variable';
  font-weight: 45 920;
  font-style: normal;
  font-display: swap;
  src: url('/fonts/PretendardVariable.woff2') format('woff2-variations'),
       url('/fonts/PretendardVariable.woff2') format('woff2');
}

:root {
  --ink: #1b1f27;
  --text: #2b2f36;
  --line: #d9dee6;
  --line-soft: #e6e9ef;
  --tint: #f4f6f9;
  --paper: #ffffff;
  --accent: #1f56c8;
  --hero-bg: #ffffff;
  --hero-ink: #1b1f27;
  --wrap: 1200px;
}
html[data-v="2"] { --accent: #1f56c8; }
html[data-v="3"] { --accent: #0f766e; --hero-bg: #f1f4f8; }
html[data-v="4"] { --accent: #15803d; }

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 92px; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--text);
  font-family: 'Pretendard Variable', Pretendard, -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Malgun Gothic', sans-serif;
  font-size: 16px;
  line-height: 1.7;
  letter-spacing: -0.01em;
  word-break: keep-all;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
b { font-weight: 600; color: var(--ink); }
h1, h2, h3 { color: var(--ink); margin: 0; letter-spacing: -0.02em; }
p { margin: 0; }

/* 언어 전환 */
html[data-lang="ko"] [lang="en"] { display: none !important; }
html[data-lang="en"] [lang="ko"] { display: none !important; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 32px; }

/* 헤더 */
.top {
  position: sticky; top: 0; z-index: 20;
  background: rgba(255,255,255,.96);
  border-bottom: 1px solid var(--line-soft);
  backdrop-filter: saturate(1.4) blur(8px);
}
.top-in { display: flex; align-items: center; height: 84px; gap: 28px; }
.logo { display: inline-flex; align-items: center; gap: 12px; font-size: 30px; font-weight: 700; color: var(--ink); letter-spacing: -0.02em; }
.logo svg { width: 44px; height: 44px; }
.menu { display: flex; margin-left: auto; }
.menu a { padding: 6px 18px; font-size: 15px; font-weight: 500; color: var(--ink); }
.menu a + a { border-left: 1px solid var(--line); }
.menu a:hover { color: var(--accent); }
.langs { display: flex; border: 1px solid var(--line); }
.langs button {
  font: inherit; font-size: 14px; font-weight: 400; color: var(--ink);
  background: #fff; border: 0; padding: 6px 14px; cursor: pointer; min-width: 58px;
}
.langs button + button { border-left: 1px solid var(--line); }
html[data-lang="ko"] .langs [data-set-lang="ko"],
html[data-lang="en"] .langs [data-set-lang="en"] { background: #e9ecf1; font-weight: 600; }

/* 버튼 */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  height: 52px; padding: 0 26px; font-size: 16px; font-weight: 500;
  border: 1px solid var(--ink); cursor: pointer; font-family: inherit;
}
.btn-main { background: var(--ink); color: #fff; }
.btn-main:hover { background: #000; }
.btn-sub { background: #fff; color: var(--ink); border-color: var(--line); }
.btn-sub:hover { border-color: var(--ink); }

/* 히어로 */
.hero { position: relative; background: var(--hero-bg); color: var(--hero-ink); padding: 88px 0 72px; overflow: hidden; }
.hero-in { position: relative; display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items: center; }
.tags { font-size: 15px; font-weight: 600; color: var(--accent); margin-bottom: 22px; }
.hero h1 { font-size: 46px; line-height: 1.32; font-weight: 700; color: inherit; }
.lead { margin-top: 26px; display: grid; gap: 12px; font-size: 17px; line-height: 1.75; max-width: 640px; }
.hero-btns { display: flex; gap: 12px; margin-top: 34px; flex-wrap: wrap; }
.hero-art { color: var(--ink); }
.orbit { width: 100%; max-width: 460px; display: block; margin-left: auto; }
.orbit text { font-size: 15px; font-weight: 600; fill: var(--ink); font-family: inherit; }
.orbit text.acc { fill: var(--accent); }
.hero-grid-bg { display: none; }

.metrics { width: 100%; margin-top: 64px; border-collapse: collapse; border: 1px solid var(--line); background: #fff; }
.metrics th, .metrics td { padding: 16px 22px; border-bottom: 1px solid var(--line); text-align: left; font-size: 16px; color: var(--text); }
.metrics tr:last-child th, .metrics tr:last-child td { border-bottom: 0; }
.metrics th { width: 300px; background: var(--tint); font-weight: 600; color: var(--ink); border-right: 1px solid var(--line); }

/* 시안 2: 먹색 히어로 */
html[data-v="2"] .hero { --hero-bg: #1b1f27; --hero-ink: #fff; }
html[data-v="2"] .hero b { color: #fff; }
html[data-v="2"] .hero .lead { color: #dbe2ea; }
html[data-v="2"] .tags { color: #8fb4ff; }
html[data-v="2"] .hero-art { color: #dbe2ea; }
html[data-v="2"] .orbit { --paper: #1b1f27; --accent: #8fb4ff; }
html[data-v="2"] .orbit text { fill: #fff; }
html[data-v="2"] .hero .btn-main { background: #fff; color: var(--ink); border-color: #fff; }
html[data-v="2"] .hero .btn-sub { background: transparent; color: #fff; border-color: rgba(255,255,255,.4); }
html[data-v="2"] .metrics { border-color: rgba(255,255,255,.22); background: transparent; }
html[data-v="2"] .metrics th, html[data-v="2"] .metrics td { border-color: rgba(255,255,255,.22); color: #dbe2ea; }
html[data-v="2"] .metrics th { background: rgba(255,255,255,.06); color: #fff; }
html[data-v="2"] .metrics b { color: #fff; }

/* 시안 3: 연회색 + 격자 */
html[data-v="3"] .hero-grid-bg {
  display: block; position: absolute; inset: 0;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 48px 48px; opacity: .55;
  mask-image: linear-gradient(90deg, transparent 0%, #000 55%);
  -webkit-mask-image: linear-gradient(90deg, transparent 0%, #000 55%);
}
html[data-v="3"] .orbit { --paper: #f1f4f8; }

/* 시안 4: 가운데 정렬 */
html[data-v="4"] .hero { padding-top: 104px; }
html[data-v="4"] .hero-in { grid-template-columns: 1fr; text-align: center; }
html[data-v="4"] .lead { margin-left: auto; margin-right: auto; max-width: 760px; }
html[data-v="4"] .hero h1 { font-size: 52px; }
html[data-v="4"] .hero-btns { justify-content: center; }
html[data-v="4"] .hero-art { position: absolute; right: -300px; top: -40px; width: 600px; opacity: .1; pointer-events: none; }
html[data-v="4"] .hero-in > .hero-text { position: relative; z-index: 1; }
html[data-v="4"] .hero-art .orbit { max-width: none; }

/* 섹션 공통 */
.sec { padding: 104px 0; }
.sec-tint { background: var(--tint); }
.sec-head { margin-bottom: 48px; }
.kicker { font-size: 15px; font-weight: 700; color: var(--accent); margin-bottom: 10px; }
.sec h2 { font-size: 36px; line-height: 1.35; font-weight: 700; }
.sec-desc { margin-top: 14px; font-size: 17px; }

/* 파이프라인 */
.pipe { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line); }
.pipe li { position: relative; padding: 28px 24px 26px; display: grid; gap: 4px; align-content: start; background: #fff; }
.pipe li + li { border-left: 1px solid var(--line); }
.pipe li + li::before {
  content: ''; position: absolute; left: -9px; top: 46px; width: 16px; height: 16px;
  background: #fff; border-top: 1px solid var(--line); border-right: 1px solid var(--line); transform: rotate(45deg);
}
.pipe-ic { width: 44px; height: 44px; display: grid; place-items: center; border: 1px solid var(--line); margin-bottom: 12px; }
.pipe-ic svg { width: 24px; height: 24px; fill: none; stroke: var(--accent); stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.pipe-no { font-size: 14px; font-weight: 600; color: var(--accent); }
.pipe b { font-size: 19px; }
.pipe span:last-child { font-size: 15px; }

.tech-list { margin-top: 40px; border-top: 1px solid var(--line); }
.tech-list article { display: grid; grid-template-columns: 96px 1fr; gap: 24px; padding: 28px 0; border-bottom: 1px solid var(--line); }
.tl-no { font-size: 28px; font-weight: 600; color: var(--accent); line-height: 1.2; }
.tl-body h3 { font-size: 21px; font-weight: 700; margin-bottom: 8px; }
.tl-body h3 span { font-size: 16px; font-weight: 500; margin-left: 8px; color: var(--text); }
.tl-body p { font-size: 16px; max-width: 860px; }

/* 솔루션 */
.sol { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.sol article { background: #fff; border: 1px solid var(--line); padding: 32px; }
.sol-top { display: flex; gap: 16px; align-items: flex-start; }
.sol-ic { flex: none; width: 48px; height: 48px; padding: 11px; border: 1px solid var(--line); fill: none; stroke: var(--accent); stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.sol h3 { font-size: 22px; font-weight: 700; line-height: 1.35; }
.sol-sub { font-size: 15px; margin-top: 2px; }
.sol-key { margin: 22px 0 14px; padding: 12px 16px; background: var(--tint); font-size: 15px; font-weight: 600; color: var(--ink); }
.sol ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.sol li { position: relative; padding-left: 18px; font-size: 16px; }
.sol li::before { content: ''; position: absolute; left: 2px; top: 11px; width: 6px; height: 6px; background: var(--accent); }

/* 로드맵 */
.road { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
.road > li { position: relative; padding: 34px 24px 0 0; }
.road > li::before { content: ''; position: absolute; left: 0; right: 0; top: 0; border-top: 2px solid var(--line); }
.road > li::after { content: ''; position: absolute; left: 0; top: -6px; width: 14px; height: 14px; background: #fff; border: 2px solid var(--accent); }
.road > li:first-child::after { background: var(--accent); }
.road-ph { font-size: 15px; font-weight: 700; color: var(--accent); }
.road h3 { font-size: 19px; line-height: 1.4; margin-top: 6px; }
.road-en { font-size: 15px; margin-top: 2px; }
.road ul { margin: 16px 0 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.road ul li { font-size: 15px; padding-left: 14px; position: relative; }
.road ul li::before { content: ''; position: absolute; left: 0; top: 11px; width: 5px; height: 5px; background: var(--ink); }

/* 문의 */
.form { background: #fff; border: 1px solid var(--line); padding: 32px; }
.cats { border: 0; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.cats legend { font-size: 15px; font-weight: 600; color: var(--ink); margin-bottom: 10px; padding: 0; }
.cats label { cursor: pointer; }
.cats input { position: absolute; opacity: 0; pointer-events: none; }
.cats label > span { display: grid; gap: 4px; height: 100%; padding: 16px 18px; border: 1px solid var(--line); min-height: 88px; }
.cats b { font-size: 16px; font-weight: 500; }
.cats em { font-style: normal; font-size: 14px; }
.cats input:checked + span { border-color: var(--accent); box-shadow: inset 0 0 0 1px var(--accent); }
.cats input:checked + span b { color: var(--accent); font-weight: 600; }
.cats input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }
.fields { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px 24px; margin-top: 28px; }
.fields label { display: grid; gap: 8px; font-size: 14px; font-weight: 500; color: var(--ink); }
.fields .full { grid-column: 1 / -1; }
.fields input, .fields textarea {
  font: inherit; font-size: 16px; color: var(--ink); width: 100%;
  border: 1px solid var(--line); padding: 12px 14px; background: #fff; border-radius: 0;
}
.fields input { height: 50px; }
.fields input:focus, .fields textarea:focus { outline: none; border-color: var(--ink); }
.form-foot { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-top: 24px; }
.form-msg { font-size: 15px; color: var(--ink); }
.form-msg.err { color: #b42318; }
.form-msg.ok { color: var(--accent); font-weight: 600; }

/* 푸터 */
.foot { padding: 56px 0 48px; border-top: 1px solid var(--line); }
.foot-top { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.foot-id { font-size: 15px; }
.legal { margin-top: 28px; padding: 22px 24px; border: 1px solid var(--line); font-size: 14px; line-height: 1.75; color: var(--text); }
.legal-t { font-size: 15px; font-weight: 600; color: var(--ink); margin-bottom: 8px; }
.legal p + p { margin-top: 4px; }
.copy { margin-top: 22px; font-size: 14px; }
.foot-links { display: flex; flex-wrap: wrap; margin-top: 28px; font-size: 15px; color: var(--ink); }
.foot-links a { padding: 0 16px; border-left: 1px solid var(--line); }
.foot-links a:first-child { padding-left: 0; border-left: 0; }
.foot-links a:hover { text-decoration: underline; }
.biz { display: flex; flex-wrap: wrap; gap: 6px 28px; margin: 16px 0 0; font-size: 14px; line-height: 1.6; color: var(--text); }
.biz div { display: flex; gap: 8px; }
.biz .full { flex-basis: 100%; }
.biz dt { color: var(--ink); font-weight: 500; }
.biz dt::after { content: ''; }
.biz dd { margin: 0; }
/* 약관 · 방침 페이지 */
.doc { padding: 56px 0 80px; }
.doc .wrap { max-width: 880px; }
.doc h1 { font-size: 32px; }
.doc .doc-date { margin-top: 10px; font-size: 15px; }
.doc h2 { font-size: 20px; margin: 40px 0 10px; }
.doc p, .doc li { font-size: 16px; }
.doc p + p { margin-top: 8px; }
.doc ul, .doc ol { margin: 8px 0 0; padding-left: 22px; }
.doc table { width: 100%; border-collapse: collapse; margin-top: 10px; font-size: 15px; }
.doc th, .doc td { border: 1px solid var(--line); padding: 10px 14px; text-align: left; vertical-align: top; }
.doc th { background: var(--tint); color: var(--ink); font-weight: 500; }
.doc .back { display: inline-block; margin-top: 48px; font-size: 15px; color: var(--ink); text-decoration: underline; }
@media (max-width: 720px) { .doc { padding: 36px 0 56px; } .doc h1 { font-size: 26px; } }
@media (max-width: 720px) { .foot-links { flex-direction: column; gap: 8px; } .foot-links a { padding: 0; border-left: 0; } }

/* 태블릿 */
@media (max-width: 1024px) {
  .hero-in { grid-template-columns: 1fr; }
  .hero-art { max-width: 380px; }
  html[data-v="4"] .hero-art { max-width: none; }
  .pipe { grid-template-columns: 1fr 1fr; }
  .pipe li:nth-child(3) { border-left: 0; }
  .pipe li:nth-child(n+3) { border-top: 1px solid var(--line); }
  .pipe li:nth-child(3)::before { display: none; }
  .road { grid-template-columns: 1fr 1fr; row-gap: 44px; }
}

/* 모바일 */
@media (max-width: 720px) {
  .wrap { padding: 0 20px; }
  .top-in { height: 68px; gap: 12px; }
  .logo { font-size: 25px; gap: 10px; }
  .logo svg { width: 36px; height: 36px; }
  .menu { display: none; }
  .langs { margin-left: auto; }
  .langs button { min-width: 52px; padding: 6px 10px; }
  .hero { padding: 56px 0 48px; }
  .hero h1, html[data-v="4"] .hero h1 { font-size: 30px; }
  .lead { font-size: 16px; }
  .hero-art { display: none; }
  html[data-v="4"] .hero-in { text-align: left; }
  html[data-v="4"] .hero-btns { justify-content: flex-start; }
  .btn { flex: 1; padding: 0 16px; }
  .metrics { margin-top: 40px; }
  .metrics tr { display: grid; }
  .metrics th { width: auto; border-right: 0; padding: 12px 16px; }
  .metrics td { padding: 12px 16px; }
  .sec { padding: 72px 0; }
  .sec h2 { font-size: 27px; }
  .sec-head { margin-bottom: 32px; }
  .pipe { grid-template-columns: 1fr; }
  .pipe li + li { border-left: 0; border-top: 1px solid var(--line); }
  .pipe li::before { display: none; }
  .tech-list article { grid-template-columns: 1fr; gap: 6px; padding: 24px 0; }
  .tl-no { font-size: 22px; }
  .tl-body h3 span { display: block; margin: 2px 0 0; }
  .sol { grid-template-columns: 1fr; }
  .sol article { padding: 22px 18px; }
  .road { grid-template-columns: 1fr; row-gap: 36px; }
  .road > li { padding-right: 0; }
  .form { padding: 22px 16px; }
  .cats, .fields { grid-template-columns: 1fr; }
  .form-foot { flex-direction: column-reverse; align-items: stretch; }
  .legal { padding: 18px 16px; }
}

/* 시안 2 확정: 첫 화면 사진 — 천천히 다가가며 네 장이 넘어간다 */
.hero-media { display: none; }
html[data-v="2"] .hero { min-height: calc(100vh - 84px); display: flex; flex-direction: column; justify-content: center; }
html[data-v="2"] .hero-media { display: block; position: absolute; inset: 0; overflow: hidden; background: #1b1f27; }
html[data-v="2"] .hero-media::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(17,20,26,.86) 0%, rgba(17,20,26,.66) 48%, rgba(17,20,26,.38) 100%),
              linear-gradient(0deg, rgba(17,20,26,.7) 0%, rgba(17,20,26,0) 40%);
}
.slide {
  position: absolute; inset: 0; background-size: cover; background-position: center;
  opacity: 0; will-change: transform, opacity;
  animation: kenburns 20s linear infinite;
}
.slide:nth-child(1) { animation-delay: 0s; transform-origin: 62% 64%; }
.slide:nth-child(2) { animation-delay: 5s; transform-origin: 70% 45%; }
.slide:nth-child(3) { animation-delay: 10s; transform-origin: 40% 55%; }
.slide:nth-child(4) { animation-delay: 15s; transform-origin: 50% 40%; }
@keyframes kenburns {
  0%   { opacity: 0; transform: scale(1); }
  4%   { opacity: 1; }
  25%  { opacity: 1; }
  30%  { opacity: 0; transform: scale(1.24); }
  100% { opacity: 0; transform: scale(1.24); }
}
/* 첫 장은 들어오자마자 보이게 */
.slide:nth-child(1) { animation-name: kenburns-first; }
@keyframes kenburns-first {
  0%   { opacity: 1; transform: scale(1); }
  25%  { opacity: 1; }
  30%  { opacity: 0; transform: scale(1.24); }
  96%  { opacity: 0; transform: scale(1); }
  100% { opacity: 1; transform: scale(1); }
}
html[data-v="2"] .hero-art { display: none; }
html[data-v="2"] .hero-in { grid-template-columns: 1fr; }
html[data-v="2"] .hero h1 { font-size: 52px; }
html[data-v="2"] .lead { max-width: 700px; }
html[data-v="2"] .metrics { background: rgba(17,20,26,.5); backdrop-filter: blur(6px); }
@media (prefers-reduced-motion: reduce) {
  .slide { animation: none; }
  .slide:nth-child(1) { opacity: 1; }
}
@media (max-width: 720px) {
  html[data-v="2"] .hero { min-height: 0; }
  html[data-v="2"] .hero h1 { font-size: 31px; }
  html[data-v="2"] .hero-media::after { background: rgba(17,20,26,.74); }
}
html[data-v="2"] .hero > .wrap { width: 100%; }

/* 10/19 확정 — 시안 랩 parts 1번: 현장 사진 위에 데이터 */
.site-photo { position: relative; margin: 0; }
.site-photo img { display: block; width: 100%; aspect-ratio: 2.2; object-fit: cover; background: var(--tint); }
.site-photo::after { content: ''; position: absolute; inset: 0; background: rgba(17,20,26,.28); pointer-events: none; }
.site-tags { position: absolute; inset: 0; z-index: 1; }
.site-tag {
  position: absolute; display: flex; align-items: center; gap: 10px; white-space: nowrap;
  background: #fff; padding: 9px 14px; font-size: 15px; font-weight: 500; color: var(--ink);
  border: 1px solid var(--ink);
}
.site-tag span { font-weight: 600; color: var(--accent); }
.site-tag em { font-style: normal; }
.site-tag i { position: absolute; left: -7px; top: 50%; width: 12px; height: 12px; margin-top: -6px; background: var(--accent); border: 2px solid #fff; border-radius: 50%; }
.site-photo figcaption { position: absolute; z-index: 1; right: 16px; bottom: 12px; font-size: 14px; color: #fff; }
.tech-cols { display: grid; grid-template-columns: repeat(4, 1fr); border-bottom: 1px solid var(--line); }
.tech-cols article { padding: 26px 24px 30px 0; }
.tech-cols article + article { padding-left: 24px; border-left: 1px solid var(--line); }
.tech-cols h3 { font-size: 21px; }
.tc-sub { font-size: 15px; font-weight: 500; color: var(--accent); margin: 2px 0 12px; }
.tech-cols p:not(.tc-sub) { font-size: 15px; line-height: 1.75; }

.sol article { padding: 0; display: flex; flex-direction: column; }
.sol-photo { display: block; width: 100%; aspect-ratio: 16/7; object-fit: cover; background: var(--tint); }
.sol-body { padding: 26px 30px 30px; }
.sol h3 { font-size: 25px; }
.sol-sub { font-size: 15px; margin-top: 2px; }

.road { border-top: 1px solid var(--ink); }
.road > li { padding: 20px 22px 0 0; }
.road > li + li { padding-left: 22px; border-left: 1px solid var(--line); }
.road > li::before, .road > li::after { display: none; }
.road-ph em { display: block; font-style: normal; font-size: 64px; line-height: 1; font-weight: 300; color: var(--ink); margin-bottom: 14px; }
.road h3 { margin-top: 4px; }

@media (max-width: 1024px) {
  .tech-cols { grid-template-columns: 1fr 1fr; }
  .tech-cols article:nth-child(3) { padding-left: 0; border-left: 0; }
  .tech-cols article:nth-child(n+3) { border-top: 1px solid var(--line); }
  .road > li:nth-child(3) { padding-left: 0; border-left: 0; }
}
@media (max-width: 720px) {
  .site-photo img { aspect-ratio: 1.5; }
  .site-tags { position: static; display: grid; gap: 8px; margin-top: 12px; }
  .site-tag { position: static !important; white-space: normal; flex-wrap: wrap; gap: 4px 10px; }
  .site-tag i { display: none; }
  .site-photo figcaption { position: static; color: var(--text); margin-top: 8px; }
  .site-photo::after { bottom: auto; height: 0; }
  .tech-cols { grid-template-columns: 1fr; }
  .tech-cols article, .tech-cols article + article { padding: 22px 0; border-left: 0; border-top: 1px solid var(--line); }
  .sol-body { padding: 20px 18px 24px; }
  .sol h3 { font-size: 22px; }
  .road > li, .road > li + li { padding: 18px 0 0; border-left: 0; }
  .road > li + li { border-top: 1px solid var(--line); }
  .road { row-gap: 24px; }
  .road-ph em { font-size: 48px; }
}