:root {
  --bg: #f7f8fb;
  --card: #ffffff;
  --text: #172033;
  --muted: #5e6b7e;
  --line: #e6e9ef;
  --accent: #2457ff;
  --accent-soft: #eef3ff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

header {
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
}

.nav {
  max-width: 1080px;
  margin: 0 auto;
  padding: 18px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  font-weight: 800;
  font-size: 20px;
  letter-spacing: 0.2px;
  color: var(--text);
}

.logo span {
  color: var(--accent);
}

nav a {
  color: var(--muted);
  margin-left: 18px;
  font-size: 14px;
}

nav a:hover {
  color: var(--accent);
}

.hero {
  max-width: 1080px;
  margin: 0 auto;
  padding: 72px 22px 42px;
}

.hero-card {
  background: linear-gradient(135deg, #fff 0%, #eef3ff 100%);
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: 54px;
}

.eyebrow {
  display: inline-block;
  color: var(--accent);
  font-weight: 700;
  font-size: 13px;
  margin-bottom: 14px;
}

h1 {
  font-size: 42px;
  line-height: 1.18;
  margin: 0 0 18px;
}

h2 {
  margin: 0 0 14px;
  font-size: 28px;
  line-height: 1.25;
}

h3 {
  margin: 0 0 10px;
  font-size: 18px;
}

.lead {
  font-size: 18px;
  color: var(--muted);
  max-width: 780px;
  margin: 0 0 26px;
}

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

.button {
  display: inline-block;
  padding: 12px 18px;
  border-radius: 12px;
  font-weight: 700;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
}

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

main {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 22px 60px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin: 24px 0 38px;
}

.card,
.section {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
}

.card {
  padding: 24px;
}

.card p,
.section p,
.page p,
.page li {
  color: var(--muted);
}

.section {
  padding: 30px;
  margin-bottom: 22px;
}

.product-panel {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 22px;
  align-items: center;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0;
  margin: 18px 0 0;
  list-style: none;
}

.tag-list li {
  color: var(--muted);
  border: 1px solid var(--line);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 13px;
}

.page {
  max-width: 900px;
  margin: 0 auto;
  padding: 44px 22px 70px;
}

.box {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 34px;
}

footer {
  border-top: 1px solid var(--line);
  padding: 26px 22px;
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}

footer a {
  color: var(--muted);
  margin: 0 8px;
}

@media (max-width: 760px) {
  .nav {
    display: block;
  }

  nav {
    margin-top: 12px;
  }

  nav a {
    margin: 0 12px 0 0;
    display: inline-block;
  }

  .hero-card {
    padding: 32px 24px;
  }

  h1 {
    font-size: 32px;
  }

  .grid,
  .product-panel {
    grid-template-columns: 1fr;
  }
}