:root {
  --ink: #0b1215;
  --paper: #f2f4f1;
  --paper-soft: #fbfcfa;
  --line: #d9ddd4;
  --muted: #5f6866;
  --teal: #146e68;
  --teal-dark: #0b4c48;
  --amber: #c79a3a;
  --clay: #a8664b;
  --blue: #253d49;
  --white: #ffffff;
  --shadow: 0 22px 70px rgba(12, 20, 22, .14);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", "Microsoft YaHei", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper-soft);
  line-height: 1.65;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(217, 221, 212, .86);
  background: rgba(251, 252, 250, .9);
  backdrop-filter: blur(18px);
}

.nav {
  width: min(1180px, calc(100% - 36px));
  height: 68px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-mark {
  width: 34px;
  height: 34px;
  border: 2px solid var(--ink);
  background: var(--amber);
  display: grid;
  place-items: center;
  color: var(--ink);
  font-weight: 900;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 14px;
  color: #243034;
}

.nav-links a {
  padding: 8px 0;
  border-bottom: 2px solid transparent;
}

.nav-links a.active,
.nav-links a:hover {
  border-color: var(--teal);
  color: var(--teal-dark);
}

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

.lang-link {
  border: 1px solid var(--line);
  padding: 8px 10px;
  font-size: 13px;
  background: var(--white);
}

.menu-toggle {
  display: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 11px 18px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--white);
  font-weight: 750;
  line-height: 1.2;
  cursor: pointer;
  transition: transform .18s ease, border-color .18s ease, background .18s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

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

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

.hero {
  min-height: 78svh;
  background-size: cover;
  background-position: center;
  color: var(--white);
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(7, 15, 17, .86) 0%, rgba(7, 15, 17, .62) 42%, rgba(7, 15, 17, .08) 100%),
    linear-gradient(0deg, rgba(7, 15, 17, .42), rgba(7, 15, 17, .1));
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 1px;
  background: rgba(255, 255, 255, .22);
}

.hero-inner {
  width: min(1180px, calc(100% - 36px));
  margin: 0 auto;
  padding: 72px 0 88px;
  position: relative;
  z-index: 1;
}

.eyebrow {
  color: #f0c85e;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.12;
  letter-spacing: 0;
  margin: 0;
}

h1 {
  max-width: 850px;
  margin-top: 16px;
  font-size: clamp(42px, 6.4vw, 78px);
}

.hero-copy {
  max-width: 720px;
  margin: 22px 0 0;
  color: rgba(255, 255, 255, .88);
  font-size: clamp(18px, 2.3vw, 24px);
}

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

.hero-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  width: min(760px, 100%);
  margin-top: 48px;
  background: rgba(255, 255, 255, .24);
  border: 1px solid rgba(255, 255, 255, .26);
}

.hero-facts div {
  padding: 18px;
  background: rgba(9, 17, 20, .5);
  backdrop-filter: blur(8px);
}

.hero-facts strong {
  display: block;
  font-size: 20px;
}

.hero-facts span {
  color: rgba(255, 255, 255, .76);
  font-size: 13px;
}

.section {
  padding: 84px 0;
}

.section.alt {
  background: var(--paper);
}

.container {
  width: min(1180px, calc(100% - 36px));
  margin: 0 auto;
}

.section-head {
  max-width: 760px;
  margin-bottom: 38px;
}

.section-head h2,
.page-title h1 {
  font-size: clamp(32px, 4.4vw, 56px);
}

.section-head p,
.page-title p {
  color: var(--muted);
  font-size: 18px;
  margin: 16px 0 0;
}

.grid {
  display: grid;
  gap: 22px;
}

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

.grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid.four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card {
  border: 1px solid var(--line);
  background: var(--white);
  border-radius: 8px;
  padding: 24px;
  box-shadow: 0 8px 32px rgba(20, 28, 31, .045);
}

a.card {
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}

a.card:hover {
  transform: translateY(-3px);
  border-color: rgba(20, 110, 104, .35);
  box-shadow: 0 18px 46px rgba(20, 28, 31, .08);
}

.card h3 {
  font-size: 22px;
}

.card p {
  margin: 12px 0 0;
  color: var(--muted);
}

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

.feature-list li {
  position: relative;
  padding-left: 26px;
}

.feature-list li::before {
  content: "";
  position: absolute;
  top: 11px;
  left: 0;
  width: 10px;
  height: 10px;
  background: var(--amber);
}

.visual-band {
  display: grid;
  grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
  gap: 36px;
  align-items: center;
}

.image-frame {
  border: 1px solid var(--line);
  background: var(--white);
  padding: 10px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.image-frame img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.image-frame.square img {
  aspect-ratio: 1 / 1;
}

.image-frame.detail img {
  aspect-ratio: 4 / 3;
}

.page-hero {
  padding: 76px 0 56px;
  background:
    linear-gradient(90deg, rgba(20, 110, 104, .08), rgba(199, 154, 58, .07)),
    var(--paper);
  border-bottom: 1px solid var(--line);
}

.page-title {
  width: min(1180px, calc(100% - 36px));
  margin: 0 auto;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, .88fr) minmax(0, 1.12fr);
  gap: 36px;
  align-items: start;
}

.metric-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.metric {
  background: var(--white);
  padding: 22px;
}

.metric strong {
  display: block;
  font-size: 28px;
}

.metric span {
  color: var(--muted);
  font-size: 14px;
}

.process {
  counter-reset: step;
  display: grid;
  gap: 16px;
}

.process .step {
  counter-increment: step;
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 16px;
  border: 1px solid var(--line);
  background: var(--white);
  padding: 18px;
}

.process .step::before {
  content: counter(step);
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  background: var(--teal);
  color: var(--white);
  font-weight: 900;
}

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

.faq details {
  border: 1px solid var(--line);
  background: var(--white);
  padding: 18px 20px;
}

.faq summary {
  cursor: pointer;
  font-weight: 800;
}

.faq p {
  color: var(--muted);
  margin: 12px 0 0;
}

.form-panel {
  border: 1px solid var(--line);
  background: var(--white);
  border-radius: 8px;
  padding: 26px;
  box-shadow: var(--shadow);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

label {
  display: grid;
  gap: 7px;
  color: #263236;
  font-weight: 700;
  font-size: 14px;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid #cbd2c9;
  background: var(--paper-soft);
  min-height: 44px;
  padding: 11px 12px;
  color: var(--ink);
  font: inherit;
}

input:focus,
select:focus,
textarea:focus {
  outline: 2px solid rgba(20, 110, 104, .18);
  border-color: var(--teal);
}

textarea {
  min-height: 122px;
  resize: vertical;
}

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

.site-footer {
  background: var(--ink);
  color: var(--white);
  padding: 48px 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr repeat(3, minmax(0, .6fr));
  gap: 26px;
}

.site-footer a,
.site-footer p {
  color: rgba(255, 255, 255, .72);
}

.footer-links {
  display: grid;
  gap: 8px;
}

.contact-list {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.contact-card {
  border: 1px solid var(--line);
  background: var(--white);
  border-radius: 8px;
  padding: 18px;
}

.contact-card span {
  display: block;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.contact-card a,
.contact-card strong {
  display: block;
  margin-top: 6px;
  color: var(--ink);
  font-size: 18px;
}

.inquiry-note {
  margin-top: 16px;
  color: var(--muted);
  font-size: 14px;
}

.product-gallery {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, .65fr);
  gap: 22px;
  align-items: stretch;
}

.product-gallery .stack {
  display: grid;
  gap: 22px;
}

.footer-contact {
  display: grid;
  gap: 8px;
  font-size: 14px;
}

.language-gate {
  min-height: 100svh;
  display: grid;
  place-items: center;
  background: var(--paper);
  padding: 24px;
}

.gate-panel {
  width: min(760px, 100%);
  border: 1px solid var(--line);
  background: var(--white);
  padding: 42px;
  box-shadow: var(--shadow);
}

.gate-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

@media (max-width: 920px) {
  .nav {
    height: auto;
    min-height: 64px;
    align-items: flex-start;
    padding: 14px 0;
  }

  .nav-links {
    display: none;
  }

  .hero-facts,
  .grid.three,
  .grid.four,
  .metric-strip,
  .footer-grid,
  .visual-band,
  .split,
  .product-gallery {
    grid-template-columns: 1fr;
  }

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

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

  .hero {
    min-height: 72svh;
    background-position: 60% center;
  }

  .hero::before {
    background: linear-gradient(90deg, rgba(7, 15, 17, .84), rgba(7, 15, 17, .62));
  }
}

@media (max-width: 520px) {
  .nav-actions .btn {
    display: none;
  }

  .hero-inner {
    padding: 52px 0 64px;
  }

  .section {
    padding: 58px 0;
  }

  .gate-panel {
    padding: 28px;
  }
}