:root {
  color-scheme: light;
  --ink: #111827;
  --muted: #5f6b7a;
  --line: #e5e7eb;
  --paper: #ffffff;
  --soft: #f4f7fb;
  --brand: #4f46e5;
  --accent: #0f766e;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.7;
}

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

.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px min(6vw, 72px);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
}

.brand {
  display: grid;
  gap: 0;
  font-weight: 800;
  letter-spacing: 0;
}

.brand span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 14px;
  color: var(--muted);
  font-size: 14px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1.1fr);
  gap: min(5vw, 64px);
  align-items: center;
  padding: min(9vw, 96px) min(6vw, 72px);
  background: #eaf3f8;
}

.hero-copy {
  max-width: 620px;
}

.eyebrow {
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

h1 {
  margin: 12px 0 20px;
  font-size: clamp(36px, 5vw, 72px);
  line-height: 1.05;
  letter-spacing: 0;
}

h2 {
  margin: 0 0 12px;
  font-size: clamp(26px, 3vw, 42px);
  line-height: 1.18;
  letter-spacing: 0;
}

h3 {
  margin: 0 0 8px;
  font-size: 20px;
}

p {
  margin: 0;
  color: var(--muted);
}

.hero p {
  max-width: 560px;
  font-size: 18px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--ink);
  border-radius: 6px;
  font-weight: 800;
}

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

.hero-image,
.media {
  width: 100%;
  border-radius: 10px;
  border: 1px solid rgba(17, 24, 39, 0.08);
  object-fit: cover;
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.12);
}

.hero-image {
  aspect-ratio: 16 / 10;
}

.section {
  padding: min(8vw, 84px) min(6vw, 72px);
}

.section.soft {
  background: var(--soft);
}

.center {
  max-width: 820px;
  margin: 0 auto 36px;
  text-align: center;
}

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

.card {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  margin-bottom: 16px;
  border-radius: 6px;
  object-fit: cover;
  background: #eef2f7;
}

.split {
  display: grid;
  grid-template-columns: minmax(280px, 0.95fr) minmax(320px, 1.05fr);
  gap: min(5vw, 56px);
  align-items: center;
}

.list {
  display: grid;
  gap: 12px;
  margin-top: 20px;
  padding: 0;
  list-style: none;
}

.list li {
  padding-left: 18px;
  border-left: 3px solid var(--brand);
  color: var(--muted);
}

.footer {
  padding: 28px min(6vw, 72px);
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
  background: #0b1117;
}

.footer p {
  color: #c5ced8;
}

@media (max-width: 820px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

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

  .hero {
    padding-top: 52px;
  }
}