:root {
  color: #1d1d1f;
  background: #f5f5f7;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: linear-gradient(180deg, #ffffff 0%, #f5f5f7 55%, #ffffff 100%);
}

main {
  max-width: 1180px;
  margin: 0 auto;
  padding: 24px;
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 72px;
}

nav strong {
  font-size: 20px;
}

nav a {
  color: #0066cc;
  text-decoration: none;
  margin-left: 20px;
  font-size: 14px;
}

.hero {
  min-height: 760px;
  padding: 10px 0 56px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
  gap: 64px;
  align-items: center;
}

.eyebrow {
  color: #0066cc;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

h1 {
  font-size: clamp(52px, 7vw, 88px);
  line-height: 0.95;
  letter-spacing: 0;
  margin: 18px 0 28px;
}

h2 {
  margin: 0 0 12px;
  font-size: 24px;
}

.lead {
  color: #515154;
  font-size: 21px;
  line-height: 1.42;
  max-width: 680px;
}

.zh {
  font-size: 18px;
}

.product-card {
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(210, 210, 215, 0.88);
  border-radius: 34px;
  box-shadow: 0 32px 90px rgba(0, 0, 0, 0.12);
  padding: 22px;
  backdrop-filter: blur(24px);
}

.toolbar,
.panel,
.brief,
.flow span,
.features article {
  background: #ffffff;
  border: 1px solid #e5e5ea;
  border-radius: 22px;
}

.toolbar {
  display: flex;
  gap: 10px;
  padding: 10px;
  color: #0066cc;
  font-size: 13px;
}

.toolbar span {
  padding: 8px 12px;
  border-radius: 999px;
  background: #f5f5f7;
}

.panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  padding: 18px;
  margin: 16px 0;
}

.panel small {
  color: #6e6e73;
  display: block;
  margin-bottom: 8px;
}

.panel strong {
  font-size: 22px;
}

.chart {
  height: 220px;
  border-radius: 24px;
  background:
    linear-gradient(145deg, rgba(0, 122, 255, 0.13), rgba(52, 199, 89, 0.09)),
    repeating-linear-gradient(90deg, transparent 0 48px, rgba(60, 60, 67, 0.08) 49px 50px),
    repeating-linear-gradient(0deg, transparent 0 48px, rgba(60, 60, 67, 0.08) 49px 50px);
  border: 1px solid #e5e5ea;
}

.brief {
  padding: 18px;
  margin-top: 16px;
}

.brief p,
.features p {
  color: #6e6e73;
  line-height: 1.55;
}

.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin: 24px 0;
}

.features article {
  padding: 24px;
}

.stack {
  background: #1d1d1f;
  color: #ffffff;
  border-radius: 34px;
  padding: 34px;
  margin: 18px 0 80px;
}

.stack h2 {
  color: #ffffff;
}

.flow {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.flow span {
  color: #1d1d1f;
  padding: 14px 16px;
}

@media (max-width: 900px) {
  .hero-grid,
  .features {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }
}