* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", Arial, sans-serif;
  background: #07111f;
  color: #e5edf7;
}

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

header {
  width: min(1100px, calc(100% - 32px));
  margin: 0 auto;
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  color: #5eead4;
  font-size: 22px;
  font-weight: 800;
}

nav {
  display: flex;
  gap: 20px;
  color: #a8b3c7;
}

nav a:hover {
  color: #5eead4;
}

main {
  width: min(1100px, calc(100% - 32px));
  margin: 0 auto;
}

.hero {
  padding: 100px 0 70px;
}

.tagline {
  color: #5eead4;
  font-weight: 700;
}

h1 {
  max-width: 850px;
  font-size: 64px;
  line-height: 1.05;
  margin: 18px 0;
}

.intro {
  max-width: 700px;
  color: #a8b3c7;
  font-size: 18px;
  line-height: 1.8;
}

.button {
  display: inline-block;
  margin-top: 20px;
  padding: 12px 18px;
  border-radius: 999px;
  background: #14b8a6;
  color: #021014;
  font-weight: 800;
}

.card {
  margin: 22px 0;
  padding: 26px;
  border-radius: 24px;
  background: #0f172a;
  border: 1px solid rgba(148, 163, 184, 0.25);
}

.card p {
  color: #a8b3c7;
  line-height: 1.8;
}

footer {
  width: min(1100px, calc(100% - 32px));
  margin: 56px auto 32px;
  color: #64748b;
}

@media (max-width: 760px) {
  header {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  nav {
    flex-wrap: wrap;
  }

  h1 {
    font-size: 42px;
  }
}