:root {
  color-scheme: light;
  --bg: #f6faf9;
  --text: #10201f;
  --muted: #5f7370;
  --line: #dbe8e5;
  --brand: #119e8a;
  --brand-dark: #0b685d;
  --panel: #ffffff;
  --soft: #e9f5f2;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", Arial, sans-serif;
  letter-spacing: 0;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 0 7vw;
  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: 12px;
  min-width: 0;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--brand), #63cf91);
  color: #fff;
  font-weight: 800;
}

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

.brand strong {
  font-size: 18px;
  line-height: 1.25;
}

.brand small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 12px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
  color: var(--muted);
  font-size: 15px;
}

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

.hero {
  min-height: 620px;
  display: flex;
  align-items: center;
  padding: 92px 7vw;
  color: #fff;
  background:
    linear-gradient(90deg, rgba(6, 22, 21, 0.9), rgba(6, 22, 21, 0.55)),
    url("./solar-field.jpg") center / cover;
}

.hero-content {
  max-width: 980px;
}

.eyebrow,
.section-label {
  margin: 0 0 14px;
  color: var(--brand);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #79e8d7;
}

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

h1 {
  margin-bottom: 20px;
  font-size: clamp(44px, 7vw, 76px);
  line-height: 1.05;
}

.hero h1 {
  white-space: nowrap;
  font-size: 64px;
  line-height: 1.12;
}

.hero-text {
  max-width: 620px;
  margin-bottom: 34px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 20px;
  line-height: 1.8;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 136px;
  height: 46px;
  padding: 0 22px;
  border-radius: 6px;
  font-weight: 700;
}

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

.button.ghost {
  border: 1px solid rgba(255, 255, 255, 0.48);
  color: #fff;
}

.section {
  width: min(1120px, 86vw);
  margin: 0 auto;
  padding: 84px 0;
  border-bottom: 1px solid var(--line);
}

.section.split,
.contact {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 72px;
  align-items: start;
}

.section h2 {
  margin-bottom: 18px;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.2;
}

.section p {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.9;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 34px;
}

.card,
.contact-panel,
.policy-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 18px 45px rgba(16, 32, 31, 0.08);
}

.card {
  min-height: 174px;
  padding: 28px;
}

.card h3 {
  margin-bottom: 14px;
  font-size: 21px;
}

.card p {
  margin-bottom: 0;
  font-size: 15px;
}

.contact-panel {
  padding: 30px;
}

dl {
  margin: 0;
}

dl div {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

dl div:first-child {
  padding-top: 0;
}

dl div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

dt {
  color: var(--muted);
  font-size: 14px;
}

dd {
  margin: 8px 0 0;
  font-size: 22px;
  font-weight: 800;
}

dd a {
  color: var(--brand-dark);
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 28px 7vw;
  color: var(--muted);
  font-size: 14px;
}

.footer a {
  color: var(--brand-dark);
  font-weight: 700;
}

.policy-page {
  width: min(900px, 86vw);
  margin: 48px auto 82px;
}

.policy-card {
  padding: clamp(28px, 5vw, 56px);
}

.policy-card h1 {
  color: var(--text);
  font-size: clamp(36px, 5vw, 54px);
}

.policy-card h2 {
  margin-top: 34px;
  font-size: 22px;
}

.policy-card p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.9;
}

.updated {
  color: var(--brand-dark) !important;
  font-weight: 700;
}

@media (max-width: 820px) {
  .site-header {
    position: static;
    display: block;
    padding: 18px 6vw;
  }

  .nav {
    flex-wrap: wrap;
    gap: 14px 18px;
    margin-top: 18px;
  }

  .hero {
    min-height: 560px;
    padding: 72px 6vw;
  }

  .hero h1 {
    font-size: 44px;
  }

  .section,
  .policy-page {
    width: min(100% - 32px, 720px);
  }

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

  .section.split,
  .contact {
    gap: 28px;
  }

  .footer {
    display: block;
  }

  .footer a {
    display: inline-block;
    margin-top: 10px;
  }
}

@media (max-width: 560px) {
  .hero h1 {
    font-size: 34px;
  }
}

@media (max-width: 420px) {
  .hero h1 {
    font-size: 28px;
  }
}