:root {
  color-scheme: light;
  --paper: #f7f5f1;
  --surface: #ffffff;
  --ink: #2d2a26;
  --muted: #6f6a63;
  --line: #ddd8d0;
  --accent: #a65f3f;
  --accent-soft: #efe1d8;
  --sage: #dce6df;
}

* {
  box-sizing: border-box;
}

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

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

.shell {
  width: min(880px, calc(100% - 32px));
  margin: 0 auto;
}

header {
  border-bottom: 1px solid var(--line);
  background: rgba(247, 245, 241, 0.96);
}

.nav {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--ink);
  font-size: 18px;
  font-weight: 700;
  text-decoration: none;
}

.brand img {
  width: 36px;
  height: 36px;
  border: 1px solid var(--line);
  border-radius: 8px;
}

nav {
  display: flex;
  gap: 18px;
  font-size: 14px;
}

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

nav a:hover,
nav a[aria-current="page"] {
  color: var(--ink);
}

main {
  padding: 64px 0 72px;
}

.intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 160px;
  gap: 48px;
  align-items: center;
  padding-bottom: 52px;
}

.intro img {
  width: 160px;
  height: 160px;
  border: 1px solid var(--line);
  border-radius: 28px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 14px;
  font-weight: 700;
}

h1 {
  margin: 0;
  font-size: clamp(36px, 8vw, 64px);
  line-height: 1.12;
  letter-spacing: 0;
}

h2 {
  margin: 36px 0 10px;
  font-size: 23px;
  line-height: 1.35;
  letter-spacing: 0;
}

h3 {
  margin: 0 0 6px;
  font-size: 17px;
  letter-spacing: 0;
}

p,
li {
  color: var(--muted);
}

.lead {
  max-width: 620px;
  margin: 18px 0 0;
  font-size: 18px;
}

.features {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.feature {
  min-height: 170px;
  padding: 28px 24px;
  border-right: 1px solid var(--line);
}

.feature:last-child {
  border-right: 0;
}

.feature p {
  margin: 0;
}

.page-title {
  max-width: 700px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.page-title h1 {
  font-size: clamp(34px, 7vw, 52px);
}

.content {
  max-width: 700px;
}

.contact {
  margin-top: 38px;
  padding: 24px;
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  background: var(--surface);
}

.contact p {
  margin: 4px 0;
}

.note {
  padding: 18px 20px;
  border: 1px solid #cbd8ce;
  background: var(--sage);
}

footer {
  padding: 26px 0 42px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

footer .shell {
  display: flex;
  justify-content: space-between;
  gap: 20px;
}

footer p {
  margin: 0;
}

@media (max-width: 680px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 0;
  }

  main {
    padding-top: 42px;
  }

  .intro {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .intro img {
    order: -1;
    width: 112px;
    height: 112px;
    border-radius: 22px;
  }

  .features {
    grid-template-columns: 1fr;
  }

  .feature {
    min-height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .feature:last-child {
    border-bottom: 0;
  }

  footer .shell {
    flex-direction: column;
  }
}