:root {
  --ink: #1e2a32;
  --muted: #66727b;
  --line: #dfe5e8;
  --paper: #f7f9f8;
  --white: #ffffff;
  --green: #1f6f5b;
  --blue: #246b9f;
  --gold: #a76d18;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px clamp(20px, 5vw, 72px);
  border-bottom: 1px solid rgba(223, 229, 232, 0.9);
  background: rgba(247, 249, 248, 0.92);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 18px;
  font-weight: 800;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 8px;
  color: var(--white);
  background: linear-gradient(135deg, var(--green), var(--blue));
  font-size: 19px;
}

.nav {
  display: flex;
  gap: 28px;
  color: var(--muted);
  font-size: 15px;
}

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

main {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 40px;
  align-items: end;
  min-height: 520px;
  padding: 76px 0 64px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 760px;
  margin-bottom: 24px;
  font-size: clamp(42px, 7vw, 78px);
  line-height: 1.04;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1.15;
}

h3 {
  margin-bottom: 12px;
  font-size: 22px;
}

.lead {
  max-width: 720px;
  margin-bottom: 34px;
  color: var(--muted);
  font-size: 20px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.primary-link,
.secondary-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border-radius: 8px;
  font-weight: 800;
}

.primary-link {
  color: var(--white);
  background: var(--green);
}

.secondary-link {
  border: 1px solid var(--line);
  background: var(--white);
}

.status-panel {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 18px 50px rgba(30, 42, 50, 0.08);
}

.status-label {
  display: block;
  margin-bottom: 12px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 800;
}

.status-panel strong {
  display: block;
  margin-bottom: 14px;
  font-size: 28px;
}

.status-panel p,
.content-block p,
.contact-section p {
  color: var(--muted);
  line-height: 1.8;
}

.section {
  padding: 64px 0;
  border-top: 1px solid var(--line);
}

.section-head {
  margin-bottom: 28px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.feature-card {
  min-height: 232px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.feature-index {
  display: block;
  margin-bottom: 44px;
  color: var(--blue);
  font-weight: 900;
}

.feature-card p {
  color: var(--muted);
  line-height: 1.75;
}

.split-section {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 46px;
}

.content-block {
  font-size: 17px;
}

.contact-section {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.mail-link {
  display: inline-flex;
  align-items: center;
  min-height: 52px;
  padding: 0 20px;
  border-radius: 8px;
  color: var(--white);
  background: var(--blue);
  font-weight: 800;
  white-space: nowrap;
}

.site-footer {
  display: flex;
  flex-direction: column;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 28px 20px 36px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.footer-main {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 18px;
}

.site-footer a {
  color: var(--blue);
}

.custom-note {
  color: rgba(102, 114, 123, 0.52);
  font-size: 11px;
  letter-spacing: 0.04em;
}

@media (max-width: 820px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
    gap: 16px;
  }

  .nav {
    width: 100%;
    justify-content: space-between;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 52px 0 48px;
  }

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

  .feature-card {
    min-height: auto;
  }

  .feature-index {
    margin-bottom: 24px;
  }

  .split-section,
  .contact-section {
    display: block;
  }

  .mail-link {
    margin-top: 20px;
    width: 100%;
    justify-content: center;
  }
}