:root {
  --brand-navy: #0b1f33;
  --brand-gold: #c8923e;
  --brand-cyan: #2c7be5;
  --brand-white: #ffffff;
  --navy: #0b2d42;
  --navy-2: #123c5a;
  --teal: #22a6a6;
  --teal-soft: #e8f7f6;
  --bg-soft: #f5f8fb;
  --bg-mist: #f7f9fc;
  --text: #263238;
  --muted: #667085;
  --border: #e5eaf0;
  --white: #ffffff;
  --gold: #c8923e;
  --shadow: 0 12px 30px rgba(15, 61, 94, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--white);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", "Noto Sans JP", "Noto Sans KR", "Hiragino Sans", "Yu Gothic", "Malgun Gothic", sans-serif;
  line-height: 1.75;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
select,
textarea {
  font: inherit;
}

h1,
h2,
h3,
p {
  margin-top: 0;
  overflow-wrap: anywhere;
}

h1,
h2,
h3 {
  color: var(--navy);
  line-height: 1.28;
  letter-spacing: 0;
}

p {
  color: var(--muted);
}

.container {
  width: min(100% - 48px, 1180px);
  margin: 0 auto;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid rgba(229, 234, 240, 0.9);
  backdrop-filter: blur(12px);
  transition: box-shadow 0.2s ease;
}

.site-header.is-scrolled {
  box-shadow: 0 10px 28px rgba(11, 45, 66, 0.08);
}

.header-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  gap: 22px;
}

.brand {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
}

.brand-logo {
  height: 46px;
  width: auto;
  display: block;
}

.main-nav {
  flex: 1 1 auto;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 24px;
  color: #344054;
  font-size: 14px;
  font-weight: 650;
}

.main-nav a {
  white-space: nowrap;
  transition: color 0.18s ease;
}

.main-nav a:hover,
.main-nav a:focus-visible {
  color: var(--teal);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.language-control select {
  width: 96px;
  min-height: 38px;
  padding: 7px 10px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--white);
  color: var(--navy);
  font-size: 13px;
}

.header-cta,
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 10px 18px;
  border-radius: 12px;
  border: 1px solid transparent;
  font-weight: 750;
  line-height: 1.25;
  text-align: center;
  cursor: pointer;
  transition: transform 0.18s ease, background 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}

.header-cta,
.btn-primary {
  color: var(--white);
  background: var(--teal);
}

.header-cta:hover,
.btn-primary:hover {
  background: #198f8f;
}

.btn-secondary {
  color: var(--navy);
  background: var(--white);
  border-color: var(--border);
}

.btn-secondary:hover {
  border-color: var(--teal);
  color: var(--teal);
}

.btn:hover,
.header-cta:hover {
  transform: translateY(-2px);
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--white);
  color: var(--navy);
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 5px auto;
  background: currentColor;
}

.section {
  padding: 88px 0;
}

.section-soft {
  background: var(--bg-soft);
}

.section-split {
  background: linear-gradient(180deg, var(--white) 0%, var(--bg-mist) 100%);
}

.section-label {
  margin-bottom: 12px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 800;
}

.section-head {
  max-width: 760px;
  margin: 0 auto 38px;
  text-align: center;
}

.section-head.align-left {
  margin-left: 0;
  text-align: left;
}

.section-head h2,
.quality-layout h2,
.split-layout h2,
.faq-layout h2,
.inquiry-card h2 {
  margin-bottom: 14px;
  font-size: clamp(28px, 3vw, 34px);
}

.hero {
  padding-top: 76px;
  background:
    linear-gradient(180deg, #ffffff 0%, #f8fbfd 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(420px, 1.05fr);
  gap: 52px;
  align-items: center;
}

.hero-copy h1 {
  max-width: 760px;
  margin-bottom: 18px;
  font-size: clamp(34px, 4.4vw, 48px);
  font-weight: 780;
}

.hero-subtitle {
  max-width: 720px;
  margin-bottom: 28px;
  color: #4f5f69;
  font-size: 17px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}

.hero-points {
  display: grid;
  gap: 10px;
  color: #425466;
  font-size: 14px;
}

.hero-points span {
  position: relative;
  padding-left: 18px;
}

.hero-points span::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--teal);
}

.hero-visual {
  position: relative;
  min-height: 430px;
}

.hero-visual img {
  width: 100%;
  height: 430px;
  object-fit: cover;
  object-position: center;
  border-radius: 18px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.floating-card {
  position: absolute;
  display: grid;
  gap: 2px;
  min-width: 128px;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: var(--shadow);
}

.floating-card strong {
  color: var(--navy);
  font-size: 18px;
}

.floating-card span {
  color: var(--muted);
  font-size: 13px;
}

.card-doc {
  left: -18px;
  bottom: 58px;
}

.card-lot {
  right: 18px;
  top: 38px;
}

.trust-bar {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--bg-mist);
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  min-height: 96px;
}

.trust-grid div {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 22px 20px;
  border-right: 1px solid var(--border);
}

.trust-grid div:last-child {
  border-right: 0;
}

.trust-grid span,
.dot {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 0 5px var(--teal-soft);
}

.trust-grid p {
  margin: 0;
  color: var(--navy);
  font-weight: 720;
  line-height: 1.45;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.category-card,
.application-card,
.advantage-grid article,
.process-rail article,
.inquiry-card,
.info-panel,
.document-panel {
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--white);
  box-shadow: var(--shadow);
}

.category-card {
  overflow: hidden;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 38px rgba(15, 61, 94, 0.11);
}

.card-image,
.product-card .card-image,
.application-card .card-image {
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: 18px 18px 0 0;
  background: var(--bg-soft);
}

.card-image img,
.product-card .card-image img,
.application-card .card-image img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

.card-body,
.product-card .card-body,
.application-card .card-body {
  padding: 24px;
}

.product-card span,
.line-code {
  display: inline-flex;
  margin-bottom: 14px;
  color: var(--teal);
  font-size: 12px;
  font-weight: 850;
}

.category-card h3,
.application-grid h3,
.advantage-grid h3,
.process-rail h3 {
  margin-bottom: 10px;
  font-size: 20px;
}

.category-card p,
.application-grid p,
.advantage-grid p,
.process-rail p {
  margin-bottom: 0;
  font-size: 15px;
}

.application-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
}

.split-layout,
.quality-layout,
.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: 48px;
  align-items: center;
}

.media-frame img,
.document-panel img,
.contact-aside img {
  width: 100%;
  object-fit: cover;
  border-radius: 18px;
}

.section-visual,
.contact-visual {
  overflow: hidden;
  border-radius: 22px;
  box-shadow: 0 16px 40px rgba(15, 61, 94, 0.1);
}

.media-frame img {
  height: 430px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.scope-list {
  display: grid;
  gap: 12px;
  margin: 28px 0;
}

.scope-list div {
  display: grid;
  grid-template-columns: 128px minmax(0, 1fr);
  gap: 14px;
  padding: 15px 0;
  border-bottom: 1px solid var(--border);
}

.scope-list strong {
  color: var(--navy);
}

.scope-list span {
  color: var(--muted);
}

.text-link {
  color: var(--teal);
  font-weight: 800;
}

.quality-layout {
  grid-template-columns: 0.9fr 1.1fr;
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.tag-cloud span {
  padding: 9px 13px;
  border-radius: 12px;
  color: var(--navy-2);
  background: var(--teal-soft);
  font-size: 14px;
  font-weight: 740;
}

.document-panel {
  padding: 16px;
}

.document-panel img {
  height: 260px;
  margin-bottom: 18px;
}

.document-panel ul {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0 4px 2px 24px;
  color: var(--muted);
}

.process-rail {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.process-rail article {
  position: relative;
  padding: 24px;
}

.process-rail span {
  display: inline-flex;
  margin-bottom: 28px;
  color: var(--teal);
  font-weight: 850;
}

.process-rail span::after {
  content: "";
  display: block;
  position: absolute;
  left: 24px;
  right: 24px;
  top: 62px;
  height: 1px;
  background: var(--border);
}

.advantage-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.advantage-grid article {
  padding: 24px;
}

.faq-layout {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 50px;
  align-items: start;
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: 18px;
  overflow: hidden;
  background: var(--white);
}

.faq-item button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  width: 100%;
  min-height: 64px;
  padding: 18px 20px;
  border: 0;
  background: var(--white);
  color: var(--navy);
  font-weight: 800;
  text-align: left;
  cursor: pointer;
}

.faq-item b {
  position: relative;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
}

.faq-item b::before,
.faq-item b::after {
  content: "";
  position: absolute;
  background: var(--teal);
}

.faq-item b::before {
  left: 0;
  top: 8px;
  width: 18px;
  height: 2px;
}

.faq-item b::after {
  left: 8px;
  top: 0;
  width: 2px;
  height: 18px;
}

.faq-item.is-open b::after {
  display: none;
}

.faq-item div {
  display: none;
  padding: 0 20px 20px;
}

.faq-item.is-open div {
  display: block;
}

.faq-item p {
  margin: 0;
}

.contact-section {
  background: var(--bg-mist);
}

.contact-layout {
  align-items: start;
}

.inquiry-card {
  padding: 30px;
}

.inquiry-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 26px;
}

.inquiry-form label {
  display: grid;
  gap: 7px;
  color: #344054;
  font-size: 14px;
  font-weight: 720;
}

.inquiry-form input,
.inquiry-form select,
.inquiry-form textarea {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--white);
  color: var(--text);
}

.inquiry-form input:focus,
.inquiry-form select:focus,
.inquiry-form textarea:focus {
  outline: 0;
  border-color: var(--teal);
  box-shadow: 0 0 0 4px rgba(34, 166, 166, 0.12);
}

.inquiry-form textarea {
  resize: vertical;
}

.full-span {
  grid-column: 1 / -1;
}

.contact-aside {
  display: grid;
  gap: 16px;
}

.contact-aside img {
  height: 310px;
  border: 1px solid var(--border);
}

.info-panel {
  padding: 24px;
}

.info-panel dl {
  display: grid;
  gap: 18px;
  margin: 0;
}

.info-panel div {
  display: grid;
  gap: 4px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.info-panel div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.info-panel dt {
  color: var(--teal);
  font-size: 13px;
  font-weight: 800;
}

.info-panel dd {
  margin: 0;
  color: var(--navy);
  font-weight: 700;
}

.info-panel a {
  color: var(--navy);
  text-decoration: none;
}

.info-panel a:hover,
.info-panel a:focus-visible {
  color: var(--teal);
}

.site-footer {
  color: rgba(255, 255, 255, 0.78);
  background: #0b2538;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.8fr;
  gap: 46px;
  padding: 48px 0 34px;
}

.footer-logo {
  height: 54px;
  width: auto;
  max-width: 100%;
  margin-bottom: 18px;
}

.site-footer h3 {
  margin-bottom: 14px;
  color: var(--white);
  font-size: 16px;
}

.site-footer p {
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.72);
}

.footer-bottom {
  padding: 18px 0 26px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

@media (max-width: 1080px) {
  .header-inner {
    gap: 14px;
  }

  .brand-logo {
    height: 44px;
  }

  .main-nav {
    gap: 15px;
  }

  .hero-grid,
  .split-layout,
  .quality-layout,
  .contact-layout,
  .faq-layout {
    grid-template-columns: 1fr;
  }

  .application-grid,
  .advantage-grid,
  .process-rail {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-visual {
    min-height: 360px;
  }
}

@media (max-width: 820px) {
  .container {
    width: min(100% - 32px, 1180px);
  }

  .header-inner {
    min-height: 68px;
    flex-wrap: wrap;
  }

  .brand-logo {
    height: 40px;
  }

  .menu-toggle {
    display: inline-block;
    margin-left: auto;
  }

  .main-nav {
    display: none;
    order: 4;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 8px 0 12px;
    border-top: 1px solid var(--border);
  }

  .main-nav.is-open {
    display: flex;
  }

  .main-nav a {
    width: 100%;
    padding: 10px 0;
  }

  .header-actions {
    margin-left: 0;
  }

  .header-cta {
    display: none;
  }

  .section {
    padding: 56px 0;
  }

  .hero {
    padding-top: 48px;
  }

  .hero-visual img {
    height: 320px;
  }

  .trust-grid,
  .category-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .trust-grid div:nth-child(2) {
    border-right: 0;
  }

  .trust-grid div {
    min-height: 86px;
  }
}

@media (max-width: 560px) {
  .container {
    width: min(100% - 28px, 1180px);
  }

  .brand-logo {
    height: 38px;
  }

  .header-actions {
    width: 100%;
    justify-content: flex-end;
    padding-bottom: 10px;
  }

  .hero-copy h1 {
    font-size: 33px;
  }

  .hero-subtitle {
    font-size: 16px;
  }

  .hero-actions,
  .btn {
    width: 100%;
  }

  .hero-visual {
    min-height: 260px;
  }

  .hero-visual img {
    height: 260px;
  }

  .floating-card {
    position: static;
    display: inline-grid;
    margin: 12px 8px 0 0;
  }

  .trust-grid,
  .category-grid,
  .application-grid,
  .advantage-grid,
  .process-rail,
  .inquiry-form,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .trust-grid div {
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .trust-grid div:last-child {
    border-bottom: 0;
  }

  .scope-list div {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .media-frame img,
  .document-panel img,
  .contact-aside img {
    height: 240px;
  }

  .inquiry-card {
    padding: 22px;
  }
}