:root {
  color-scheme: light;
  --ink: #18201d;
  --muted: #59635e;
  --line: #d9dfdb;
  --paper: #f7f5ef;
  --surface: #ffffff;
  --jade: #0f6b55;
  --jade-dark: #0a4438;
  --cinnabar: #9e2f22;
  --gold: #c99137;
  --soft: #edf3ef;
  --shadow: 0 18px 48px rgba(16, 35, 29, 0.14);
  font-family: "Noto Sans SC", "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

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

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

.site-header {
  align-items: center;
  background: rgba(247, 245, 239, 0.92);
  border-bottom: 1px solid rgba(24, 32, 29, 0.08);
  display: flex;
  gap: 28px;
  justify-content: space-between;
  left: 0;
  min-height: 76px;
  padding: 14px clamp(18px, 5vw, 72px);
  position: fixed;
  right: 0;
  top: 0;
  transition: box-shadow 180ms ease, background 180ms ease;
  z-index: 20;
}

.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 12px 30px rgba(27, 39, 34, 0.1);
}

.brand {
  align-items: center;
  display: flex;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  align-items: center;
  background: var(--jade);
  border-radius: 6px;
  color: #fff;
  display: inline-flex;
  flex: 0 0 46px;
  font-weight: 800;
  height: 46px;
  justify-content: center;
}

.brand strong {
  display: block;
  font-size: 16px;
  line-height: 1.25;
  white-space: nowrap;
}

.brand small {
  color: var(--muted);
  display: block;
  font-size: 11px;
  line-height: 1.25;
  margin-top: 4px;
}

.site-nav {
  align-items: center;
  display: flex;
  gap: 24px;
  font-size: 15px;
  font-weight: 600;
}

.site-nav a {
  color: #2a3530;
  white-space: nowrap;
}

.site-nav a:hover,
.text-link:hover {
  color: var(--cinnabar);
}

.nav-toggle {
  background: transparent;
  border: 0;
  display: none;
  flex-direction: column;
  gap: 5px;
  height: 42px;
  justify-content: center;
  padding: 8px;
  width: 42px;
}

.nav-toggle span {
  background: var(--ink);
  display: block;
  height: 2px;
  width: 24px;
}

.hero {
  color: #fff;
  min-height: 680px;
  overflow: hidden;
  position: relative;
}

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

.hero img {
  object-fit: cover;
}

.hero-overlay {
  background:
    linear-gradient(90deg, rgba(10, 34, 28, 0.86) 0%, rgba(10, 34, 28, 0.72) 42%, rgba(10, 34, 28, 0.14) 100%),
    linear-gradient(0deg, rgba(10, 34, 28, 0.58), rgba(10, 34, 28, 0.02) 45%);
}

.hero-content {
  max-width: 820px;
  padding: 190px clamp(18px, 6vw, 92px) 96px;
  position: relative;
  z-index: 1;
}

.eyebrow {
  color: var(--gold);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0;
  margin: 0 0 12px;
}

.hero h1 {
  font-size: clamp(42px, 6vw, 76px);
  letter-spacing: 0;
  line-height: 1.08;
  margin: 0;
  max-width: 780px;
}

.hero-copy {
  color: rgba(255, 255, 255, 0.88);
  font-size: clamp(17px, 2vw, 22px);
  margin: 26px 0 0;
  max-width: 720px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.button {
  align-items: center;
  border-radius: 6px;
  display: inline-flex;
  font-weight: 800;
  justify-content: center;
  min-height: 48px;
  padding: 12px 22px;
}

.button.primary {
  background: var(--cinnabar);
  color: #fff;
}

.button.ghost {
  border: 1px solid rgba(255, 255, 255, 0.7);
  color: #fff;
}

.facts {
  background: var(--jade-dark);
  color: #fff;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  padding: 0 clamp(18px, 6vw, 92px);
}

.facts div {
  border-left: 1px solid rgba(255, 255, 255, 0.18);
  min-height: 116px;
  padding: 24px 26px;
}

.facts div:last-child {
  border-right: 1px solid rgba(255, 255, 255, 0.18);
}

.facts strong {
  display: block;
  font-size: clamp(24px, 3vw, 38px);
  line-height: 1;
}

.facts span {
  color: rgba(255, 255, 255, 0.78);
  display: block;
  font-size: 14px;
  margin-top: 10px;
}

.section {
  padding: 92px clamp(18px, 6vw, 92px);
}

.split {
  align-items: start;
  display: grid;
  gap: clamp(32px, 5vw, 72px);
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.75fr);
}

.reverse {
  grid-template-columns: minmax(320px, 0.82fr) minmax(0, 1fr);
}

.reverse .section-copy {
  order: 2;
}

.section-copy h2,
.section-heading h2,
.contact-section h2 {
  font-size: clamp(30px, 4vw, 48px);
  letter-spacing: 0;
  line-height: 1.18;
  margin: 0;
}

.section-copy p,
.section-heading p,
.contact-section p {
  color: var(--muted);
  font-size: 17px;
  margin: 20px 0 0;
}

.info-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 28px;
}

.info-panel h3 {
  font-size: 22px;
  margin: 0 0 18px;
}

dl {
  margin: 0;
}

.info-panel div {
  border-top: 1px solid var(--line);
  padding: 16px 0;
}

.info-panel div:first-child {
  border-top: 0;
  padding-top: 0;
}

dt {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

dd {
  margin: 6px 0 0;
  overflow-wrap: anywhere;
}

.band {
  background: var(--soft);
}

.section-heading {
  max-width: 850px;
}

.section-heading.compact {
  margin-bottom: 34px;
}

.quality-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 42px;
}

.quality-grid article,
.product-list article {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 26px;
}

.quality-grid span {
  color: var(--cinnabar);
  display: block;
  font-size: 13px;
  font-weight: 900;
}

.quality-grid h3,
.product-list h3 {
  font-size: 22px;
  margin: 12px 0 10px;
}

.quality-grid p,
.product-list p {
  color: var(--muted);
  margin: 0;
}

.product-layout {
  align-items: center;
  display: grid;
  gap: clamp(28px, 5vw, 70px);
  grid-template-columns: minmax(280px, 0.82fr) minmax(0, 1fr);
}

.product-visual {
  border-radius: 8px;
  box-shadow: var(--shadow);
  width: 100%;
}

.product-list {
  display: grid;
  gap: 16px;
}

.text-link {
  color: var(--jade);
  display: inline-block;
  font-weight: 900;
  margin-top: 26px;
}

.timeline {
  background: var(--jade-dark);
  border-radius: 8px;
  color: #fff;
  padding: 18px 28px;
}

.timeline div {
  align-items: center;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
  display: grid;
  gap: 18px;
  grid-template-columns: 88px 1fr;
  min-height: 72px;
}

.timeline div:first-child {
  border-top: 0;
}

.timeline time {
  color: var(--gold);
  font-weight: 900;
}

.contact-section {
  align-items: center;
  background: var(--cinnabar);
  color: #fff;
  display: grid;
  gap: 34px;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.8fr);
  padding: 74px clamp(18px, 6vw, 92px);
}

.contact-section .eyebrow,
.contact-section p {
  color: rgba(255, 255, 255, 0.82);
}

address {
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  display: grid;
  font-style: normal;
  gap: 12px;
  padding: 24px;
}

address a {
  font-size: 22px;
  font-weight: 900;
}

address span {
  color: rgba(255, 255, 255, 0.86);
}

.site-footer {
  align-items: center;
  background: #101714;
  color: rgba(255, 255, 255, 0.7);
  display: flex;
  gap: 24px;
  justify-content: space-between;
  padding: 24px clamp(18px, 6vw, 92px);
}

.site-footer div {
  display: grid;
  gap: 4px;
}

.site-footer div:last-child {
  text-align: right;
}

.site-footer strong {
  color: #fff;
}

@media (max-width: 980px) {
  .site-nav {
    background: #fff;
    border-bottom: 1px solid var(--line);
    display: none;
    gap: 0;
    left: 0;
    padding: 8px 18px 18px;
    position: absolute;
    right: 0;
    top: 76px;
  }

  .site-nav.is-open {
    display: grid;
  }

  .site-nav a {
    border-top: 1px solid var(--line);
    padding: 14px 0;
  }

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

  .facts,
  .quality-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .reverse .section-copy {
    order: initial;
  }
}

@media (max-width: 640px) {
  .brand small {
    display: none;
  }

  .brand strong {
    font-size: 14px;
    white-space: normal;
  }

  .hero {
    min-height: 620px;
  }

  .hero-content {
    padding-top: 150px;
  }

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

  .facts,
  .quality-grid {
    grid-template-columns: 1fr;
  }

  .facts div,
  .facts div:last-child {
    border-left: 0;
    border-right: 0;
    border-top: 1px solid rgba(255, 255, 255, 0.18);
  }

  .facts div:first-child {
    border-top: 0;
  }

  .section {
    padding-bottom: 64px;
    padding-top: 64px;
  }

  .site-footer {
    align-items: start;
    flex-direction: column;
  }

  .site-footer div:last-child {
    text-align: left;
  }
}