:root {
  --accent: #00c3ff;
  --dark: #0f172a;
  --bg: #f6fbfa;
  --muted: #94a3b8;
  --max: 1200px;
  font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: var(--bg);
  color: var(--dark);
  line-height: 1.6;
}

.container {
  max-width: var(--max);
  margin: auto;
  padding: 0 20px;
}

section {
  padding: 80px 0;
}

h1,
h2,
h3 {
  line-height: 1.15;
}

h2 {
  font-size: clamp(32px, 4vw, 48px);
  margin-bottom: 22px;
}

p {
  color: #475569;
}

.hero {
  padding: 170px 0;
  color: #fff;
  background:
    linear-gradient(rgba(15, 23, 42, .74), rgba(15, 23, 42, .82)),
    url('/assets/images/solar-power-plant-01.webp') center/cover;
}

.hero h1 {
  font-size: clamp(40px, 6vw, 72px);
  max-width: 900px;
  margin-bottom: 18px;
}

.hero p {
  max-width: 760px;
  font-size: 20px;
  color: #e2e8f0;
  margin-bottom: 28px;
}

.btn {
  display: inline-block;
  padding: 16px 30px;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 700;
  color: #fff;
  background: var(--accent);
  box-shadow: 0 16px 35px rgba(0, 195, 255, .25);
}

.section-dark {
  background: linear-gradient(135deg, #0f172a, #111827);
  color: #fff;
}

.section-dark p {
  color: #cbd5e1;
}

.grid2,
.cards3,
.cards4 {
  display: grid;
  gap: 24px;
}

.grid2 {
  grid-template-columns: 1fr 1fr;
  align-items: center;
}

.cards3 {
  grid-template-columns: repeat(3, 1fr);
}

.cards4 {
  grid-template-columns: repeat(4, 1fr);
}

.card {
  background: #fff;
  border-radius: 22px;
  padding: 32px;
  box-shadow: 0 18px 40px rgba(0, 0, 0, .05);
}

.feature {
  background: rgba(255, 255, 255, .05);
  border: 1px solid rgba(255, 255, 255, .08);
  border-radius: 22px;
  padding: 30px;
}

.card h3,
.feature h3 {
  margin-bottom: 12px;
  font-size: 24px;
}

.icon {
  font-size: 34px;
  margin-bottom: 12px;
}

.visual {
  min-height: 420px;
  border-radius: 22px;
  background: linear-gradient(135deg, #0f172a, #111827);
  position: relative;
  overflow: hidden;
}

.visual::before {
  content: '';
  position: absolute;
  inset: -80px;
  background: radial-gradient(circle, rgba(0, 195, 255, .30), transparent 55%);
}

.visual::after {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/hero_01.png') center/contain no-repeat;
  opacity: .28;
}

.faq-item {
  background: #fff;
  border-radius: 18px;
  padding: 28px;
  box-shadow: 0 12px 26px rgba(0, 0, 0, .05);
  margin-bottom: 18px;
}

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

.cta {
  text-align: center;
}

.cta p {
  max-width: 760px;
  margin: 0 auto 28px;
}

@media (max-width: 992px) {
  .grid2,
  .cards3,
  .cards4 {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 130px 0;
  }
}