:root {
  --navy: #092745;
  --teal: #18a997;
  --ink: #11263b;
  --muted: #607287;
  --line: #d9e4ea;
  --mist: #f3f8fa;
  --white: #fff;
  --orange: #ef7d32;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  color: var(--ink);
  font:
    16px/1.7 Pretendard,
    "Noto Sans KR",
    "Apple SD Gothic Neo",
    Arial,
    sans-serif;
  background: #fff;
}
a {
  color: inherit;
  text-decoration: none;
}
.wrap {
  width: min(1120px, calc(100% - 40px));
  margin: auto;
}
header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}
.nav {
  height: 82px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand img {
  display: block;
  width: 217px;
  height: 56px;
  object-fit: contain;
}
.nav-right {
  display: flex;
  gap: 20px;
  align-items: center;
  font-weight: 800;
}
.nav-right a:hover {
  color: var(--teal);
}
.hero {
  position: relative;
  min-height: 560px;
  display: flex;
  align-items: center;
  color: #fff;
  background:
    linear-gradient(
      90deg,
      rgba(5, 27, 48, 0.97),
      rgba(5, 27, 48, 0.72),
      rgba(5, 27, 48, 0.28)
    ),
    url("../assets/respirator.jpg") 72% center/cover;
}
.hero-copy {
  padding: 86px 0;
  max-width: 720px;
}
.eyebrow {
  font-size: 0.8rem;
  font-weight: 900;
  letter-spacing: 0.15em;
  color: #58d5c6;
  text-transform: uppercase;
}
.hero h1 {
  font-size: clamp(2.7rem, 5vw, 4.7rem);
  line-height: 1.08;
  letter-spacing: -0.05em;
  margin: 16px 0 20px;
}
.hero p {
  font-size: 1.08rem;
  color: #d8e5ec;
  max-width: 690px;
}
.actions {
  display: flex;
  gap: 12px;
  margin-top: 30px;
}
.btn {
  display: inline-flex;
  padding: 13px 20px;
  border-radius: 9px;
  background: var(--teal);
  color: #042f2b;
  font-weight: 900;
}
.btn.secondary {
  background: #fff;
  color: var(--navy);
}
.section {
  padding: 78px 0;
}
.section.alt {
  background: var(--mist);
}
.section-head {
  display: flex;
  justify-content: space-between;
  gap: 32px;
  align-items: end;
  margin-bottom: 34px;
}
.section-head h2 {
  font-size: 2.35rem;
  line-height: 1.2;
  letter-spacing: -0.04em;
  margin: 0;
}
.section-head p {
  max-width: 540px;
  margin: 0;
  color: var(--muted);
}
.product-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.product {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
  padding: 28px;
}
.product .type {
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  color: var(--teal);
}
.product h3 {
  font-size: 1.45rem;
  line-height: 1.25;
  margin: 10px 0;
}
.product p {
  color: var(--muted);
  margin: 0 0 16px;
}
.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}
.chips span {
  padding: 6px 10px;
  border-radius: 6px;
  background: var(--mist);
  font-size: 0.82rem;
  font-weight: 800;
}
.product-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}
.product-actions a {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 9px 13px;
  border-radius: 8px;
  font-size: 0.88rem;
  font-weight: 900;
}
.buy-link {
  background: var(--navy);
  color: #fff;
}
.buy-link:hover,
.inquiry-link:hover {
  background: #13466f;
}
.guide-link {
  color: #175b92;
  background: #eef6fb;
  border: 1px solid #cfe2ef;
}
.guide-link:hover {
  border-color: #4382b5;
}
.inquiry-link {
  background: var(--teal);
  color: #042f2b;
}
.air-system {
  background: #071f37;
  color: #fff;
}
.air-system .section-head p,
.air-system .catalog-note {
  color: #b9cad6;
}
.mode-compare {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin-bottom: 24px;
}
.mode-compare article,
.airline-flow article,
.monitor-grid > div {
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.06);
}
.mode-compare article {
  padding: 27px;
}
.mode-compare span,
.airline-flow small {
  color: #58d5c6;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.mode-compare h3 {
  margin: 8px 0 10px;
  font-size: 1.35rem;
}
.mode-compare p,
.airline-flow p,
.monitor-grid p {
  margin: 0;
  color: #c5d5df;
}
.airline-flow {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
  gap: 10px;
  align-items: stretch;
}
.airline-flow article {
  padding: 20px;
}
.airline-flow strong {
  display: block;
  margin: 6px 0 8px;
  font-size: 1rem;
}
.airline-flow > i {
  display: flex;
  align-items: center;
  color: #58d5c6;
  font-style: normal;
  font-size: 1.35rem;
}
.monitor-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin-top: 24px;
}
.monitor-grid > div {
  padding: 23px;
}
.monitor-grid strong {
  display: block;
  margin-bottom: 10px;
}
.monitor-grid span {
  display: block;
  color: #c5d5df;
  margin-top: 5px;
}
.catalog-note {
  margin: 18px 0 0;
  font-size: 0.8rem;
}
.air-detail-link{margin-top:24px}.system-hero{padding:92px 0 78px;color:#fff;background:linear-gradient(135deg,#061a2f 0%,#0b3857 58%,#0c655f 100%)}.breadcrumb{display:flex;gap:8px;margin-bottom:24px;color:#b9cad6;font-size:.9rem}.system-hero h1{max-width:880px;margin:14px 0 18px;font-size:clamp(2.7rem,6vw,5rem);line-height:1.06;letter-spacing:-.05em}.system-hero .lead{max-width:780px;margin:0;color:#d4e3eb;font-size:1.1rem}.system-layout{display:grid;grid-template-columns:1.05fr .95fr;gap:28px;align-items:start}.system-layout h2,.detail-heading h2{margin:8px 0 15px;font-size:clamp(2rem,4vw,3.2rem);line-height:1.18;letter-spacing:-.04em}.system-layout>div>p,.detail-heading>p{color:var(--muted)}.system-summary{display:grid;gap:12px}.system-summary article{padding:20px;border:1px solid var(--line);border-radius:14px;background:var(--mist)}.system-summary strong{display:block;margin-bottom:5px}.system-summary p{margin:0;color:var(--muted)}.system-chain{display:grid;grid-template-columns:repeat(5,1fr);gap:12px;margin-top:30px}.system-chain article{min-height:185px;padding:22px;border:1px solid var(--line);border-radius:15px;background:#fff}.system-chain small,.detail-card small{color:var(--teal);font-weight:900}.system-chain strong{display:block;margin:9px 0;font-size:1.05rem}.system-chain p,.detail-card p,.detail-card li{margin-top:0;color:var(--muted)}.detail-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:28px}.detail-card{padding:27px;border:1px solid var(--line);border-radius:17px;background:#fff}.detail-card h3{margin:8px 0 12px;font-size:1.35rem}.detail-card ul{margin:14px 0 0;padding-left:19px}.important-box{margin-top:24px;padding:24px;border-left:4px solid var(--orange);background:#fff7f0;color:#5e493c}
.guide {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.guide article {
  border-radius: 16px;
  padding: 25px;
  background: #fff;
  border: 1px solid var(--line);
}
.guide strong {
  display: block;
  font-size: 1.08rem;
  margin-bottom: 8px;
}
.guide p {
  margin: 0;
  color: var(--muted);
}
.filter-key {
  margin-top: 26px;
  padding: 24px;
  border-radius: 16px;
  background: var(--navy);
  color: #fff;
}
.filter-key > strong {
  display: block;
  margin-bottom: 12px;
  font-size: 1.08rem;
}
.filter-key > div {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}
.filter-key span {
  padding: 7px 11px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 7px;
  color: #d9e7ef;
  font-size: 0.88rem;
}
.filter-key b {
  color: #58d5c6;
  margin-right: 4px;
}
.notice {
  margin-top: 16px;
  padding: 21px 24px;
  border-left: 4px solid var(--orange);
  background: #fff;
  color: var(--muted);
}
.technical-center{background:#f4f7fb;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.technical-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:42px;align-items:center}
.technical-grid h2{font-size:clamp(2rem,4vw,3rem);line-height:1.18;letter-spacing:-.04em;margin:10px 0 16px}
.technical-grid p{color:var(--muted);margin:0}
.technical-links{display:grid;gap:12px}
.technical-links a{display:flex;justify-content:space-between;gap:16px;padding:18px;border:1px solid var(--line);border-radius:12px;background:#fff}
.technical-links a:hover{border-color:#2f66b3;box-shadow:0 10px 24px rgba(9,39,69,.08)}
.technical-links span{color:#2f66b3;font-weight:850}
.cta {
  padding: 36px;
  border-radius: 18px;
  background: var(--navy);
  color: #fff;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 22px;
}
.cta h2 {
  margin: 0;
}
.cta p {
  margin: 6px 0 0;
  color: #c7d6df;
}
footer {
  padding: 34px 0;
  background: #061a2f;
  color: #afc0cd;
  font-size: 0.86rem;
}
footer a{color:#fff;font-weight:800}
@media (max-width: 820px) {
  .product-grid,
  .guide,
  .technical-grid,
  .mode-compare,
  .monitor-grid,
  .system-layout,
  .detail-grid {
    grid-template-columns: 1fr;
  }
  .airline-flow {
    grid-template-columns: 1fr;
  }
  .airline-flow > i {
    justify-content: center;
    transform: rotate(90deg);
  }
  .system-chain{grid-template-columns:1fr 1fr}
  .section-head,
  .cta {
    display: block;
  }
  .section-head p {
    margin-top: 14px;
  }
  .cta .btn {
    margin-top: 18px;
  }
  .nav-right > a:not(.lang) {
    display: none;
  }
  .hero {
    min-height: 620px;
    background-position: 62% center;
  }
}
@media (max-width: 520px) {
  .wrap {
    width: min(100% - 28px, 1120px);
  }
  .brand img {
    width: 175px;
    height: 46px;
  }
  .nav {
    height: 74px;
  }
  .hero h1 {
    font-size: 2.55rem;
  }
  .actions {
    display: grid;
  }
  .section {
    padding: 58px 0;
  }
  .system-chain{grid-template-columns:1fr}
}