:root {
  color: #20302c;
  background: #f5f1e8;
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 88% 8%, rgb(203 170 98 / 20%), transparent 28rem),
    #f5f1e8;
}

a {
  color: inherit;
}

.site-header,
main,
footer {
  width: min(1180px, calc(100% - 48px));
  margin-inline: auto;
}

.site-header {
  min-height: 92px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-mark,
.product-icon {
  display: grid;
  place-items: center;
  color: #fff8e7;
  background: #1f4f44;
  box-shadow: 0 12px 28px rgb(31 79 68 / 18%);
}

.brand-mark {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  font-family: "STKaiti", "KaiTi", serif;
  font-size: 23px;
}

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

.brand strong {
  font-size: 18px;
  letter-spacing: 0.08em;
}

.brand small {
  margin-top: 2px;
  color: #79847f;
  font-size: 10px;
  letter-spacing: 0.2em;
}

nav {
  display: flex;
  gap: 32px;
}

nav a {
  color: #52615c;
  font-size: 14px;
  text-decoration: none;
}

nav a:hover,
.text-link:hover {
  color: #b37622;
}

.hero {
  min-height: 620px;
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(320px, 0.75fr);
  gap: 72px;
  align-items: center;
  padding: 72px 0 96px;
}

.eyebrow {
  margin: 0 0 18px;
  color: #b37622;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
}

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

h1 {
  margin-bottom: 28px;
  color: #173c34;
  font-family: "STSong", "Songti SC", serif;
  font-size: clamp(46px, 6vw, 76px);
  font-weight: 600;
  line-height: 1.16;
  letter-spacing: -0.04em;
}

.lead {
  max-width: 690px;
  margin-bottom: 12px;
  color: #52615c;
  font-size: 18px;
  line-height: 1.9;
}

.english {
  color: #7b8581;
  font-family: Georgia, serif;
  font-size: 15px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 14px;
  margin-top: 36px;
}

.button {
  min-width: 132px;
  padding: 14px 22px;
  border: 1px solid #1f4f44;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  text-align: center;
  text-decoration: none;
}

.button.primary {
  color: #fff;
  background: #1f4f44;
}

.button.secondary {
  color: #1f4f44;
  background: rgb(255 255 255 / 45%);
}

.identity-card {
  padding: 38px;
  border: 1px solid rgb(31 79 68 / 16%);
  border-radius: 28px;
  background: rgb(255 253 247 / 78%);
  box-shadow: 0 24px 80px rgb(62 50 29 / 10%);
  backdrop-filter: blur(12px);
}

.card-label,
.product-type {
  color: #b37622;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.identity-card h2 {
  margin: 14px 0 10px;
  font-family: "STSong", "Songti SC", serif;
  font-size: 28px;
  line-height: 1.45;
}

.identity-card > p:not(.card-label) {
  color: #697570;
  font-family: Georgia, serif;
  line-height: 1.65;
}

dl {
  margin: 30px 0 0;
}

dl div {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 16px;
  padding: 17px 0;
  border-top: 1px solid rgb(31 79 68 / 10%);
}

dt {
  color: #84908c;
  font-size: 13px;
}

dd {
  margin: 0;
  color: #263a34;
  font-size: 14px;
  font-weight: 600;
}

.section {
  padding: 96px 0;
  border-top: 1px solid rgb(31 79 68 / 13%);
}

.section-heading {
  max-width: 680px;
  margin-bottom: 42px;
}

.section h2 {
  margin-bottom: 16px;
  color: #173c34;
  font-family: "STSong", "Songti SC", serif;
  font-size: clamp(32px, 4vw, 48px);
}

.section-heading > p:last-child,
.contact > div > p:last-child {
  color: #67736f;
  line-height: 1.8;
}

.product-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 30px;
  align-items: center;
  padding: 36px;
  border-radius: 24px;
  color: #f5f1e8;
  background: #173c34;
}

.product-icon {
  width: 74px;
  height: 74px;
  border: 1px solid rgb(255 255 255 / 18%);
  border-radius: 22px;
  background: #2e6659;
  font-family: "STKaiti", "KaiTi", serif;
  font-size: 32px;
}

.product-card h3 {
  margin-bottom: 8px;
  font-size: 26px;
}

.product-card p:last-child {
  max-width: 650px;
  margin-bottom: 0;
  color: #cbd5d1;
  line-height: 1.75;
}

.text-link {
  white-space: nowrap;
  color: #f0c77e;
  font-weight: 600;
  text-decoration: none;
}

.company-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid rgb(31 79 68 / 16%);
  border-left: 1px solid rgb(31 79 68 / 16%);
}

.company-grid > div {
  min-height: 150px;
  padding: 28px;
  border-right: 1px solid rgb(31 79 68 / 16%);
  border-bottom: 1px solid rgb(31 79 68 / 16%);
}

.company-grid span,
.contact-email span {
  display: block;
  margin-bottom: 15px;
  color: #82908b;
  font-size: 12px;
  letter-spacing: 0.08em;
}

.company-grid strong {
  display: block;
  line-height: 1.75;
}

.company-grid a {
  text-underline-offset: 4px;
}

.contact {
  display: grid;
  grid-template-columns: 1fr minmax(320px, 0.7fr);
  gap: 64px;
  align-items: center;
}

.contact-email {
  padding: 30px;
  border-radius: 22px;
  color: #f5f1e8;
  background: #b37622;
  text-decoration: none;
}

.contact-email span {
  color: rgb(255 255 255 / 72%);
}

.contact-email strong {
  font-size: clamp(20px, 3vw, 28px);
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 48px;
  padding: 44px 0 56px;
  border-top: 1px solid rgb(31 79 68 / 13%);
  color: #74807c;
  font-size: 12px;
}

footer strong,
footer span {
  display: block;
}

footer strong {
  margin-bottom: 6px;
  color: #334a43;
  font-size: 14px;
}

footer p {
  margin: 0;
}

@media (max-width: 820px) {
  .site-header,
  main,
  footer {
    width: min(100% - 32px, 680px);
  }

  nav {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 42px;
    padding: 68px 0 72px;
  }

  .hero-copy {
    order: 1;
  }

  .identity-card {
    order: 2;
  }

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

  .product-card {
    align-items: start;
  }

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

  footer {
    flex-direction: column;
    gap: 20px;
  }
}

@media (max-width: 520px) {
  .site-header {
    min-height: 76px;
  }

  h1 {
    font-size: 42px;
  }

  .lead {
    font-size: 16px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .identity-card,
  .product-card {
    padding: 26px;
  }

  dl div {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .section {
    padding: 72px 0;
  }
}