:root {
  color-scheme: light;
  --bg: #f6f7f4;
  --ink: #19201c;
  --muted: #5f685f;
  --line: #d9ded5;
  --panel: #ffffff;
  --accent: #2e6f52;
  --accent-dark: #1f553d;
  --warm: #f0c36d;
  --soft: #e7efe8;
}

* {
  box-sizing: border-box;
}

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

a {
  color: var(--accent-dark);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(246, 247, 244, 0.92);
  position: sticky;
  top: 0;
  z-index: 2;
  backdrop-filter: blur(12px);
}

.nav {
  width: min(1080px, calc(100% - 32px));
  min-height: 64px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  font-weight: 720;
  letter-spacing: 0;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 14px;
}

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

.nav-links a:hover {
  color: var(--ink);
}

main {
  width: min(1080px, calc(100% - 32px));
  margin: 0 auto;
}

.hero {
  min-height: 54vh;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(220px, 0.65fr);
  gap: 48px;
  align-items: center;
  padding: 72px 0 44px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent-dark);
  font-size: 14px;
  font-weight: 700;
}

h1,
h2,
h3 {
  line-height: 1.18;
  letter-spacing: 0;
}

h1 {
  margin: 0;
  max-width: 760px;
  font-size: 64px;
}

h2 {
  margin: 0 0 18px;
  font-size: 30px;
}

h3 {
  margin: 0 0 10px;
  font-size: 20px;
}

.lead {
  max-width: 720px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 19px;
}

.hero-visual {
  justify-self: end;
  display: grid;
  gap: 18px;
  justify-items: center;
}

.app-icon {
  width: min(220px, 46vw);
  aspect-ratio: 1;
  border-radius: 28%;
  box-shadow: 0 24px 64px rgba(25, 32, 28, 0.18);
}

.visual-caption {
  max-width: 260px;
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 16px;
  border: 1px solid var(--accent-dark);
  border-radius: 6px;
  color: var(--accent-dark);
  text-decoration: none;
  font-weight: 700;
}

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

.section {
  padding: 46px 0;
  border-top: 1px solid var(--line);
}

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

.tile {
  min-height: 180px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

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

.meta {
  margin: 0 0 22px;
  color: var(--muted);
  font-size: 14px;
}

.copy {
  max-width: 820px;
  padding-bottom: 64px;
}

.copy h1 {
  margin-top: 58px;
  font-size: 52px;
}

.copy h2 {
  margin-top: 34px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.copy ul {
  padding-left: 1.2rem;
}

.notice {
  margin: 24px 0;
  padding: 18px 20px;
  border-left: 4px solid var(--accent);
  background: var(--soft);
  color: var(--ink);
}

.site-footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.footer-inner {
  width: min(1080px, calc(100% - 32px));
  min-height: 80px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 14px;
}

@media (max-width: 760px) {
  .nav,
  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    padding: 14px 0;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-top: 48px;
  }

  h1 {
    font-size: 42px;
  }

  .copy h1 {
    font-size: 36px;
  }

  .hero-visual {
    justify-self: start;
  }

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