:root {
  --bg: #fbfcf7;
  --panel: #ffffff;
  --text: #203328;
  --muted: #607064;
  --line: #dfe7dc;
  --brand: #2f7d4d;
  --brand-strong: #1f5f3b;
  --gold: #d8a83f;
  --blue: #496f8f;
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
}

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

a:hover {
  text-decoration: underline;
}

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

.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(251, 252, 247, 0.92);
  position: sticky;
  top: 0;
  z-index: 2;
  backdrop-filter: blur(12px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: linear-gradient(145deg, #e7f5d9, #b9dfb6);
  color: var(--brand-strong);
  font-weight: 900;
  border: 1px solid #cfe5c5;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 15px;
}

.hero {
  padding: 84px 0 58px;
  display: grid;
  grid-template-columns: 1.04fr 0.96fr;
  gap: 56px;
  align-items: center;
}

.hero h1 {
  margin: 0;
  font-size: clamp(42px, 7vw, 78px);
  line-height: 1.02;
  letter-spacing: 0;
}

.lead {
  margin: 24px 0 0;
  max-width: 640px;
  color: var(--muted);
  font-size: 20px;
}

.actions {
  margin-top: 34px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 8px;
  font-weight: 700;
  border: 1px solid var(--line);
  background: var(--panel);
}

.button.primary {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
}

.hero-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 24px;
  box-shadow: 0 24px 70px rgba(47, 83, 59, 0.12);
}

.phone {
  border: 1px solid #cdd9ce;
  border-radius: 28px;
  padding: 18px;
  background: #f7faf1;
}

.phone-screen {
  border-radius: 18px;
  background: #fff;
  padding: 20px;
  min-height: 410px;
  display: grid;
  gap: 14px;
}

.mini-row,
.course-row {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfdf9;
}

.mini-title {
  font-weight: 800;
}

.mini-meta,
.course-meta {
  color: var(--muted);
  font-size: 13px;
}

.section {
  padding: 58px 0;
}

.section h2,
.legal h1 {
  margin: 0 0 18px;
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.12;
  letter-spacing: 0;
}

.section-copy {
  color: var(--muted);
  max-width: 760px;
  font-size: 18px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 28px;
}

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

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

.card p {
  margin: 0;
  color: var(--muted);
}

.timeline {
  margin-top: 28px;
  display: grid;
  gap: 14px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 18px;
  align-items: start;
  padding: 18px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.time {
  color: var(--brand-strong);
  font-weight: 800;
}

.legal {
  padding: 52px 0 72px;
  max-width: 860px;
}

.legal h2 {
  margin-top: 34px;
}

.legal li {
  margin: 8px 0;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 28px 0;
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 820px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
    padding: 16px 0;
  }

  .nav-links {
    flex-wrap: wrap;
  }

  .hero {
    grid-template-columns: 1fr;
    padding-top: 54px;
  }

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

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