:root {
  color-scheme: light;
  --ink: #15202a;
  --muted: #5b6670;
  --paper: #f8faf7;
  --surface: #ffffff;
  --line: #dce4df;
  --marine: #0d5c63;
  --marine-dark: #083c45;
  --seaweed: #4d7b57;
  --coral: #d25b4c;
  --ice: #e7f3f1;
  --gold: #c99840;
  --shadow: 0 18px 46px rgba(18, 32, 42, 0.14);
  --radius: 8px;
  font-family: Inter, "Segoe UI", "Noto Sans SC", "Microsoft YaHei", "Hiragino Sans", Meiryo, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.7;
}

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

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

.site-header {
  align-items: center;
  background: rgba(248, 250, 247, 0.94);
  border-bottom: 1px solid rgba(21, 32, 42, 0.08);
  display: flex;
  gap: 24px;
  justify-content: space-between;
  left: 0;
  min-height: 76px;
  padding: 14px clamp(18px, 4vw, 56px);
  position: sticky;
  right: 0;
  top: 0;
  z-index: 20;
}

.brand {
  align-items: center;
  display: inline-flex;
  gap: 12px;
  min-width: 240px;
}

.brand-mark {
  align-items: center;
  background: var(--marine);
  border: 2px solid rgba(255, 255, 255, 0.78);
  border-radius: 50%;
  color: white;
  display: inline-flex;
  flex: 0 0 46px;
  font-weight: 800;
  height: 46px;
  justify-content: center;
  line-height: 1;
  width: 46px;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 0.98rem;
  line-height: 1.25;
}

.brand small {
  color: var(--muted);
  font-size: 0.72rem;
  letter-spacing: 0;
}

.site-nav {
  align-items: center;
  display: flex;
  gap: clamp(12px, 2vw, 24px);
  font-size: 0.94rem;
  font-weight: 650;
}

.site-nav > a {
  color: #24313b;
  padding: 8px 0;
}

.site-nav > a:hover {
  color: var(--marine);
}

.language-links {
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  display: inline-flex;
  gap: 4px;
  padding: 4px;
}

.language-links a {
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.82rem;
  padding: 5px 10px;
  white-space: nowrap;
}

.language-links a.active {
  background: var(--marine);
  color: white;
}

.nav-toggle {
  background: transparent;
  border: 0;
  display: none;
  height: 42px;
  padding: 8px;
  width: 42px;
}

.nav-toggle span {
  background: var(--ink);
  border-radius: 999px;
  display: block;
  height: 2px;
  margin: 5px 0;
  width: 24px;
}

.hero {
  min-height: clamp(620px, 84vh, 820px);
  overflow: hidden;
  position: relative;
}

.hero picture,
.hero img {
  height: 100%;
  inset: 0;
  position: absolute;
  width: 100%;
}

.hero img {
  object-fit: cover;
}

.hero-overlay {
  background:
    linear-gradient(90deg, rgba(7, 31, 38, 0.84) 0%, rgba(7, 31, 38, 0.62) 43%, rgba(7, 31, 38, 0.16) 100%),
    linear-gradient(0deg, rgba(7, 31, 38, 0.26), rgba(7, 31, 38, 0.02));
  inset: 0;
  position: absolute;
}

.hero-content {
  color: white;
  max-width: 760px;
  padding: clamp(96px, 14vw, 168px) clamp(20px, 7vw, 96px) 86px;
  position: relative;
  z-index: 1;
}

.eyebrow {
  color: var(--coral);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  margin: 0 0 12px;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #ffb4a8;
}

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

h1 {
  font-size: clamp(2.5rem, 5.8vw, 5.6rem);
  letter-spacing: 0;
  line-height: 1.04;
  margin-bottom: 24px;
  max-width: 920px;
}

h2 {
  font-size: clamp(1.8rem, 3vw, 3.1rem);
  letter-spacing: 0;
  line-height: 1.14;
  margin-bottom: 18px;
}

h3 {
  font-size: 1.12rem;
  line-height: 1.3;
  margin-bottom: 8px;
}

.hero-copy {
  color: rgba(255, 255, 255, 0.88);
  font-size: clamp(1.05rem, 1.5vw, 1.28rem);
  max-width: 660px;
}

.hero-actions,
.button {
  align-items: center;
  display: flex;
}

.hero-actions {
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  font: inherit;
  font-weight: 760;
  justify-content: center;
  min-height: 48px;
  padding: 12px 20px;
}

.button.primary {
  background: var(--coral);
  color: white;
}

.button.primary:hover {
  background: #bb4e41;
}

.button.secondary {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.42);
  color: white;
}

.button.secondary:hover {
  background: rgba(255, 255, 255, 0.2);
}

.intro-strip {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 1px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 0 auto;
  max-width: 1180px;
  position: relative;
  transform: translateY(-38px);
  width: calc(100% - 40px);
  z-index: 3;
}

.intro-strip div {
  background: var(--surface);
  border: 1px solid var(--line);
  min-height: 116px;
  padding: 24px;
}

.intro-strip strong,
.intro-strip span {
  display: block;
}

.intro-strip strong {
  font-size: 1.04rem;
  margin-bottom: 6px;
}

.intro-strip span {
  color: var(--muted);
  font-size: 0.94rem;
}

.section {
  margin: 0 auto;
  max-width: 1180px;
  padding: clamp(42px, 7vw, 92px) 20px;
}

.split {
  align-items: start;
  display: grid;
  gap: clamp(28px, 5vw, 72px);
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.8fr);
}

.section-copy p:not(.eyebrow),
.section-heading p {
  color: var(--muted);
  max-width: 720px;
}

.fact-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.fact-panel dl {
  margin: 0;
}

.fact-panel div {
  border-bottom: 1px solid var(--line);
  padding: 22px 24px;
}

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

.fact-panel dt {
  color: var(--marine);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  margin-bottom: 6px;
  text-transform: uppercase;
}

.fact-panel dd {
  margin: 0;
}

.section-heading {
  margin-bottom: 32px;
}

.product-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.product-grid article {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  min-height: 292px;
  padding: 22px;
}

.product-grid img {
  aspect-ratio: 1;
  background: var(--ice);
  border-radius: 50%;
  height: 92px;
  margin-bottom: 20px;
  object-fit: contain;
  padding: 10px;
  width: 92px;
}

.product-grid p {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 0;
}

.route-section {
  max-width: 1220px;
}

.route-layout {
  align-items: center;
  display: grid;
  gap: clamp(28px, 5vw, 64px);
  grid-template-columns: minmax(0, 0.95fr) minmax(340px, 1fr);
}

.route-map {
  background: #edf5f2;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  width: 100%;
}

.timeline {
  display: grid;
  gap: 14px;
}

.timeline div {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px 20px 62px;
  position: relative;
}

.timeline span {
  color: var(--coral);
  font-size: 0.82rem;
  font-weight: 850;
  left: 22px;
  position: absolute;
  top: 22px;
}

.timeline p {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 0;
}

.quality-band {
  background: var(--marine-dark);
  color: white;
  max-width: none;
  padding-left: max(20px, calc((100vw - 1180px) / 2 + 20px));
  padding-right: max(20px, calc((100vw - 1180px) / 2 + 20px));
}

.quality-band .section-copy p:not(.eyebrow) {
  color: rgba(255, 255, 255, 0.74);
}

.check-list {
  display: grid;
  gap: 12px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.check-list li {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  min-height: 58px;
  padding: 16px 18px 16px 44px;
  position: relative;
}

.check-list li::before {
  background: var(--gold);
  border-radius: 50%;
  content: "";
  height: 10px;
  left: 20px;
  position: absolute;
  top: 24px;
  width: 10px;
}

.contact-section {
  display: grid;
  gap: clamp(28px, 5vw, 72px);
  grid-template-columns: minmax(0, 0.9fr) minmax(340px, 1fr);
}

.contact-copy p {
  color: var(--muted);
}

address {
  color: var(--ink);
  font-style: normal;
  margin-top: 28px;
}

address span {
  border-bottom: 1px solid var(--line);
  display: block;
  padding: 11px 0;
}

address a {
  color: var(--marine);
  font-weight: 700;
}

.inquiry-form {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  display: grid;
  gap: 16px;
  padding: clamp(22px, 4vw, 34px);
}

.inquiry-form label {
  display: grid;
  gap: 7px;
}

.inquiry-form span {
  color: #33414b;
  font-size: 0.9rem;
  font-weight: 750;
}

input,
select,
textarea {
  background: #fbfdfb;
  border: 1px solid #cfdad4;
  border-radius: 6px;
  color: var(--ink);
  font: inherit;
  min-height: 46px;
  padding: 10px 12px;
  width: 100%;
}

textarea {
  min-height: 132px;
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--marine);
  box-shadow: 0 0 0 3px rgba(13, 92, 99, 0.14);
  outline: none;
}

.form-note {
  color: var(--muted);
  font-size: 0.88rem;
  margin: 0;
}

.site-footer {
  background: #111b22;
  color: rgba(255, 255, 255, 0.76);
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  justify-content: space-between;
  padding: 30px clamp(20px, 6vw, 72px);
}

.site-footer p {
  margin: 0;
}

@media (max-width: 980px) {
  .site-header {
    align-items: flex-start;
  }

  .nav-toggle {
    display: inline-block;
  }

  .site-nav {
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    border-top: 1px solid var(--line);
    display: none;
    flex-direction: column;
    left: 0;
    padding: 18px 20px 24px;
    position: absolute;
    right: 0;
    top: 75px;
  }

  .site-nav.open {
    display: flex;
  }

  .language-links {
    margin-top: 6px;
  }

  .split,
  .route-layout,
  .contact-section {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 680px) {
  body {
    font-size: 15px;
  }

  .site-header {
    min-height: 70px;
    padding: 12px 16px;
  }

  .brand {
    min-width: 0;
  }

  .brand strong {
    font-size: 0.9rem;
  }

  .brand small {
    display: none;
  }

  .brand-mark {
    flex-basis: 40px;
    height: 40px;
    width: 40px;
  }

  .site-nav {
    top: 69px;
  }

  .hero {
    min-height: 610px;
  }

  .hero img {
    object-position: 76% center;
  }

  .hero-overlay {
    background:
      linear-gradient(0deg, rgba(7, 31, 38, 0.82) 0%, rgba(7, 31, 38, 0.58) 62%, rgba(7, 31, 38, 0.18) 100%);
  }

  .hero-content {
    padding: 108px 20px 70px;
  }

  h1 {
    font-size: clamp(2.18rem, 13vw, 3.3rem);
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .intro-strip {
    grid-template-columns: 1fr;
    transform: translateY(-24px);
  }

  .intro-strip div {
    min-height: auto;
    padding: 20px;
  }

  .section {
    padding-top: 52px;
    padding-bottom: 52px;
  }

  .product-grid {
    grid-template-columns: 1fr;
  }

  .product-grid article {
    min-height: auto;
  }

  .timeline div {
    padding-left: 54px;
  }

  .site-footer {
    display: block;
  }

  .site-footer p + p {
    margin-top: 6px;
  }
}