:root {
  --green: #0f6b4b;
  --green-dark: #084532;
  --blue: #155e9f;
  --ink: #10201b;
  --muted: #5c6b65;
  --line: #dce8e2;
  --bg: #f5faf7;
  --white: #ffffff;
  --shadow: 0 20px 60px rgba(16, 32, 27, 0.1);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.75;
}

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

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px min(5vw, 56px);
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  font-weight: 700;
  color: var(--green-dark);
}

.brand img {
  width: 132px;
  height: auto;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 15px;
}

.site-nav a {
  text-decoration: none;
  color: var(--muted);
}

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

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: var(--white);
  padding: 8px 12px;
  color: var(--green-dark);
}

.hero,
.page-hero,
.section {
  padding: 72px min(5vw, 56px);
}

.hero {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: 48px;
  min-height: 72vh;
  background:
    linear-gradient(135deg, rgba(15, 107, 75, 0.08), rgba(21, 94, 159, 0.08)),
    var(--bg);
}

.hero-text,
.section > *,
.page-hero > * {
  max-width: 1120px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--green);
  font-weight: 700;
  letter-spacing: 0.08em;
}

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

h1 {
  margin-bottom: 20px;
  font-size: clamp(36px, 5vw, 62px);
  line-height: 1.16;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(26px, 3vw, 40px);
  line-height: 1.25;
}

h3 {
  margin-bottom: 10px;
  font-size: 22px;
}

.lead {
  max-width: 720px;
  color: var(--muted);
  font-size: 20px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 18px;
  border: 1px solid var(--green);
  text-decoration: none;
  font-weight: 700;
}

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

.button.secondary {
  color: var(--green);
  background: transparent;
}

.hero-media img,
.rounded-media {
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 32px;
}

.product-grid,
.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.product-card {
  display: grid;
  grid-template-columns: 210px 1fr;
  gap: 24px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.product-card img {
  height: 210px;
  width: 100%;
  border-radius: 8px;
  object-fit: cover;
}

.product-card a,
.text-link {
  color: var(--green);
  font-weight: 700;
}

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

.feature-grid article,
.info-panel,
.contact-card,
.contact-form,
.faq-list article,
.timeline article {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.feature-grid span {
  display: inline-flex;
  margin-bottom: 16px;
  color: var(--blue);
  font-weight: 800;
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  align-items: center;
}

.check-list {
  padding-left: 20px;
  color: var(--muted);
}

.page-hero {
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}

.spec-table {
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: var(--white);
}

.spec-table div {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 16px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
}

.spec-table div:last-child {
  border-bottom: 0;
}

.spec-table strong {
  color: var(--green-dark);
}

.timeline,
.faq-list {
  display: grid;
  gap: 18px;
}

.contact-form {
  display: grid;
  gap: 14px;
}

.contact-form label {
  display: grid;
  gap: 6px;
  color: var(--green-dark);
  font-weight: 700;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 11px 12px;
  font: inherit;
}

.form-note {
  margin: 0;
  color: var(--green);
  font-weight: 700;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 32px;
  padding: 36px min(5vw, 56px);
  color: #d7e6df;
  background: var(--green-dark);
}

.site-footer p {
  margin-bottom: 0;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.site-footer a {
  color: #d7e6df;
  text-decoration: none;
}

@media (max-width: 880px) {
  .site-header {
    align-items: flex-start;
    flex-wrap: wrap;
  }

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

  .site-nav {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    padding-top: 12px;
  }

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

  .hero,
  .split,
  .product-grid,
  .feature-grid {
    grid-template-columns: 1fr;
  }

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

  .spec-table div {
    grid-template-columns: 1fr;
  }

  .site-footer {
    flex-direction: column;
  }
}