* {
  box-sizing: border-box;
}

:root {
  color-scheme: light;
  --bg: #f7f4ef;
  --surface: #ffffff;
  --surface-soft: #fffaf2;
  --text: #202124;
  --muted: #62666d;
  --line: #ded8ce;
  --brand: #19745f;
  --brand-dark: #0f5748;
  --accent: #c7633a;
  --shadow: 0 18px 45px rgba(57, 50, 40, 0.12);
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
}

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

a:hover {
  text-decoration: underline;
}

.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(255, 250, 242, 0.86);
  backdrop-filter: blur(14px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.nav {
  max-width: 1080px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: 0;
  color: var(--text);
}

.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--brand), #72aa65 58%, #f0b25b);
  box-shadow: inset 0 -1px 0 rgba(0, 0, 0, 0.12);
}

.nav-links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  justify-content: flex-end;
  font-size: 15px;
}

.hero {
  max-width: 1080px;
  margin: 0 auto;
  padding: 72px 24px 46px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(260px, 0.95fr);
  gap: 48px;
  align-items: center;
}

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

h1 {
  margin: 0;
  font-size: clamp(40px, 7vw, 76px);
  line-height: 1.04;
  letter-spacing: 0;
}

h2 {
  margin: 0 0 16px;
  font-size: 28px;
  line-height: 1.25;
  letter-spacing: 0;
}

h3 {
  margin: 28px 0 8px;
  font-size: 20px;
  letter-spacing: 0;
}

p {
  margin: 0 0 14px;
}

.lead {
  margin-top: 22px;
  font-size: 20px;
  color: var(--muted);
  max-width: 680px;
}

.actions {
  margin-top: 30px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 18px;
  border-radius: 8px;
  background: var(--brand);
  color: #fff;
  font-weight: 700;
  border: 1px solid var(--brand);
}

.button.secondary {
  background: transparent;
  color: var(--brand-dark);
  border-color: var(--brand-dark);
}

.button:hover {
  text-decoration: none;
  background: var(--brand-dark);
  border-color: var(--brand-dark);
}

.button.secondary:hover {
  background: rgba(25, 116, 95, 0.08);
  color: var(--brand-dark);
}

.preview-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  align-items: start;
}

.preview-strip img {
  width: 100%;
  aspect-ratio: 1242 / 2688;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(0, 0, 0, 0.08);
}

.preview-strip img:nth-child(even) {
  margin-top: 34px;
}

.section {
  max-width: 1080px;
  margin: 0 auto;
  padding: 40px 24px;
}

.band {
  background: var(--surface);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

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

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px;
}

.band .card {
  background: var(--surface-soft);
}

.card strong {
  display: block;
  margin-bottom: 8px;
  font-size: 18px;
}

.doc {
  max-width: 860px;
  margin: 0 auto;
  padding: 52px 24px 70px;
}

.doc-header {
  padding-bottom: 26px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--line);
}

.doc-header h1 {
  font-size: clamp(34px, 6vw, 54px);
}

.meta {
  margin-top: 14px;
  color: var(--muted);
}

.notice {
  padding: 18px 20px;
  border: 1px solid rgba(25, 116, 95, 0.26);
  border-radius: 8px;
  background: rgba(25, 116, 95, 0.08);
  margin: 22px 0;
}

.doc ul {
  padding-left: 22px;
}

.doc li {
  margin: 8px 0;
}

.footer {
  border-top: 1px solid var(--line);
  padding: 28px 24px;
  color: var(--muted);
  text-align: center;
  background: var(--surface-soft);
}

@media (max-width: 760px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-links {
    justify-content: flex-start;
  }

  .hero {
    grid-template-columns: 1fr;
    padding-top: 46px;
  }

  .preview-strip {
    grid-template-columns: repeat(4, minmax(112px, 1fr));
    overflow-x: auto;
    padding-bottom: 8px;
  }

  .preview-strip img:nth-child(even) {
    margin-top: 0;
  }

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