:root {
  --bg: #ffffff;
  --surface: #f5f8f3;
  --surface-strong: #e5f0df;
  --text: #172118;
  --muted: #5d6b5e;
  --line: #dbe4d7;
  --green: #2d7a42;
  --green-dark: #185a2c;
  --gold: #ba7b26;
  --shadow: 0 22px 55px rgba(34, 73, 42, 0.14);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px clamp(20px, 5vw, 72px);
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 18px;
  white-space: nowrap;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--green);
  color: #fff;
  font-size: 18px;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: clamp(14px, 2vw, 28px);
  color: var(--muted);
  font-size: 14px;
}

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

.section {
  padding: clamp(56px, 8vw, 96px) clamp(20px, 5vw, 72px);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1.1fr);
  align-items: center;
  gap: clamp(32px, 6vw, 76px);
  min-height: calc(100vh - 68px);
  background:
    radial-gradient(circle at 78% 28%, rgba(45, 122, 66, 0.12), transparent 28%),
    linear-gradient(180deg, #fff 0%, #f8fbf7 100%);
}

.hero h1 {
  margin: 0;
  font-size: clamp(44px, 6.2vw, 78px);
  line-height: 1.08;
  letter-spacing: 0;
}

.hero-lead {
  margin: 22px 0 0;
  color: var(--green-dark);
  font-size: clamp(24px, 3vw, 38px);
  font-weight: 700;
  line-height: 1.25;
}

.hero-text {
  max-width: 620px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 18px;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 700;
  border: 1px solid var(--green);
}

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

.button.secondary {
  background: #fff;
  color: var(--green-dark);
}

.hero-media {
  overflow: hidden;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  background: var(--surface);
}

.hero-media img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 11;
  object-fit: cover;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

h2 {
  margin: 0;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.2;
  letter-spacing: 0;
}

h3 {
  margin: 16px 0 8px;
  font-size: 21px;
  line-height: 1.35;
}

.section-heading p,
.feature-card p,
.company-copy p,
.legal-card p {
  color: var(--muted);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.feature-card {
  min-height: 236px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.feature-icon {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--surface-strong);
  color: var(--green-dark);
  font-weight: 800;
}

.company-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: clamp(28px, 5vw, 70px);
  background: var(--surface);
}

.company-copy {
  max-width: 860px;
}

.info-panel {
  align-self: start;
  padding: 26px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: 0 18px 40px rgba(34, 73, 42, 0.08);
}

.info-panel dl {
  margin: 0;
}

.info-panel div + div {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.info-panel dt {
  color: var(--muted);
  font-size: 13px;
}

.info-panel dd {
  margin: 4px 0 0;
  font-weight: 700;
}

.site-footer {
  padding: 26px clamp(20px, 5vw, 72px);
  background: #142017;
  color: rgba(255, 255, 255, 0.78);
  font-size: 14px;
}

.site-footer p {
  margin: 0;
}

.site-footer p + p {
  margin-top: 8px;
}

.site-footer span {
  margin: 0 8px;
}

.legal-page {
  padding: clamp(34px, 6vw, 70px) clamp(16px, 5vw, 72px);
  background: var(--surface);
}

.legal-card {
  max-width: 980px;
  margin: 0 auto;
  padding: clamp(26px, 5vw, 56px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: 0 18px 46px rgba(34, 73, 42, 0.08);
}

.legal-card h1 {
  margin: 0;
  font-size: clamp(30px, 5vw, 48px);
  line-height: 1.18;
  letter-spacing: 0;
}

.legal-card h2 {
  margin-top: 34px;
  font-size: 24px;
}

.legal-meta {
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}

table {
  width: 100%;
  margin: 18px 0 22px;
  border-collapse: collapse;
  font-size: 14px;
}

th,
td {
  padding: 13px 14px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--surface);
  color: var(--green-dark);
}

@media (max-width: 860px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav {
    width: 100%;
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .hero,
  .company-section {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .hero {
    padding-top: 44px;
  }

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

  .info-panel {
    width: 100%;
  }

  .legal-card {
    padding: 24px 16px;
  }

  table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }
}

@media (max-width: 520px) {
  .brand {
    font-size: 16px;
  }

  .hero h1 {
    font-size: 42px;
  }

  .hero-lead {
    font-size: 24px;
  }

  .hero-text {
    font-size: 16px;
  }

  .button {
    width: 100%;
  }
}