:root {
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: #252736;
  background: #f5f6fa;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  line-height: 1.8;
}

a {
  color: #5b4cc4;
  text-underline-offset: 3px;
}

.page {
  width: min(880px, calc(100% - 32px));
  margin: 32px auto;
  padding: 48px 56px;
  border: 1px solid #e7e8ef;
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 10px 30px rgba(31, 34, 61, 0.06);
}

.brand {
  margin: 0 0 8px;
  color: #6757d7;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

h1 {
  margin: 0;
  color: #1f2130;
  font-size: clamp(30px, 6vw, 42px);
  line-height: 1.3;
}

.meta {
  margin: 12px 0 32px;
  color: #6b6e7e;
  font-size: 14px;
}

.lead {
  padding: 18px 20px;
  border-left: 4px solid #7365db;
  border-radius: 4px 12px 12px 4px;
  background: #f6f4ff;
}

h2 {
  margin: 34px 0 12px;
  color: #292b3b;
  font-size: 21px;
  line-height: 1.5;
}

p,
li {
  font-size: 16px;
}

ul {
  padding-left: 1.4em;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin-top: 42px;
  padding-top: 22px;
  border-top: 1px solid #ececf2;
  font-size: 14px;
}

.copyright {
  margin: 18px 0 0;
  color: #858796;
  font-size: 13px;
}

@media (max-width: 640px) {
  .page {
    width: 100%;
    margin: 0;
    padding: 30px 22px 40px;
    border: 0;
    border-radius: 0;
    box-shadow: none;
  }

  h2 {
    margin-top: 28px;
  }
}