:root {
  --ink: #18201c;
  --graphite: #27302c;
  --forest: #173a30;
  --moss: #6e7d58;
  --copper: #b48a62;
  --paper: #f7f4ee;
  --linen: #ebe5da;
  --white: #ffffff;
  --muted: #6d726b;
  --line: rgba(24, 32, 28, 0.14);
  --shadow: 0 18px 50px rgba(24, 32, 28, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
  line-height: 1.7;
}

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

.site-header {
  position: fixed;
  z-index: 10;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 5vw, 72px);
  color: var(--ink);
  background: rgba(247, 244, 238, 0.9);
  border-bottom: 1px solid rgba(24, 32, 28, 0.12);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  width: 178px;
  height: 48px;
}

.brand img {
  display: block;
  width: 100%;
  height: auto;
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2vw, 30px);
  font-size: 14px;
  color: rgba(24, 32, 28, 0.78);
  white-space: nowrap;
}

.nav a:hover {
  color: var(--forest);
}

.hero {
  position: relative;
  min-height: 760px;
  display: flex;
  align-items: center;
  overflow: hidden;
  color: var(--white);
}

.hero img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(8, 13, 11, 0.86) 0%, rgba(8, 13, 11, 0.62) 35%, rgba(8, 13, 11, 0.16) 72%);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(680px, calc(100% - 40px));
  margin-left: clamp(20px, 8vw, 112px);
  padding-top: 70px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--copper);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: break-word;
}

h1 {
  margin: 0;
  max-width: 620px;
  font-size: clamp(42px, 6vw, 76px);
  line-height: 1.08;
  font-weight: 650;
}

.hero-copy {
  max-width: 560px;
  margin: 26px 0 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: 18px;
}

.hero-actions,
.dealer-panel {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-actions {
  margin-top: 38px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  border-radius: 4px;
  font-size: 15px;
  font-weight: 700;
}

.btn.primary {
  color: var(--white);
  background: var(--forest);
}

.btn.secondary {
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.46);
}

.section {
  padding: 96px clamp(20px, 6vw, 88px);
}

.section-heading {
  max-width: 720px;
  margin-bottom: 38px;
}

h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.18;
  font-weight: 650;
}

h3 {
  margin: 0 0 10px;
  font-size: 20px;
  line-height: 1.35;
}

.intro-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 0.9fr);
  gap: 48px;
  align-items: start;
}

.intro-grid > p {
  margin: 0;
  max-width: 760px;
  font-size: 22px;
  line-height: 1.8;
}

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

.stats div,
.product-card,
.contact-card {
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.stats div {
  padding: 22px 24px;
  border-radius: 6px;
}

.stats strong,
.stats span {
  display: block;
}

.stats strong {
  font-size: 24px;
  color: var(--forest);
}

.stats span {
  margin-top: 4px;
  color: var(--muted);
}

.muted {
  background: var(--linen);
}

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

.product-card {
  min-height: 260px;
  padding: 28px;
  border-radius: 6px;
}

.card-index {
  display: block;
  margin-bottom: 42px;
  color: var(--copper);
  font-family: Georgia, serif;
  font-size: 30px;
}

.product-card p,
.feature-list p,
.dealer-panel p,
.contact p {
  margin: 0;
  color: var(--muted);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(360px, 1fr);
  gap: 56px;
  align-items: start;
  background: var(--forest);
  color: var(--white);
}

.split > div:first-child p:last-child {
  max-width: 540px;
  margin-top: 22px;
  color: rgba(255, 255, 255, 0.75);
}

.feature-list {
  display: grid;
  gap: 18px;
}

.feature-list div {
  padding: 0 0 22px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
}

.feature-list p {
  color: rgba(255, 255, 255, 0.7);
}

.dealer-panel {
  justify-content: space-between;
  padding: 34px;
  color: var(--white);
  background: var(--graphite);
  border-left: 6px solid var(--copper);
  border-radius: 6px;
}

.dealer-panel p {
  max-width: 760px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 18px;
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(340px, 0.8fr);
  gap: 56px;
  align-items: start;
  background: var(--linen);
}

.contact-card {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 28px;
  border-radius: 6px;
  font-style: normal;
}

.contact-card span {
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.contact-card span:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 26px clamp(20px, 6vw, 88px);
  color: rgba(255, 255, 255, 0.68);
  background: #111714;
  font-size: 14px;
}

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

  .nav {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 4px;
  }

  .hero {
    min-height: 720px;
  }

  .intro-grid,
  .split,
  .contact {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 640px) {
  .site-header {
    padding: 16px 18px;
  }

  .brand {
    width: 150px;
    height: 42px;
  }

  .nav {
    flex-wrap: wrap;
    gap: 8px 16px;
    white-space: normal;
    overflow: visible;
    font-size: 13px;
  }

  .hero {
    min-height: 720px;
  }

  .hero-content {
    width: calc(100% - 36px);
    margin: 0 18px;
    padding-top: 130px;
  }

  h1 {
    font-size: 38px;
  }

  .hero-copy,
  .intro-grid > p,
  .dealer-panel p {
    font-size: 17px;
  }

  .section {
    padding: 72px 18px;
  }

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

  .product-card {
    min-height: auto;
  }

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