:root {
  --bg: #f6f2ea;
  --ink: #1f2225;
  --brand: #0b2a5c;
  --accent: #d86c1f;
  --accent-soft: #ffeddc;
  --line: #d9cbb8;
  --card: #fffdfa;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(1100px 500px at 0% 0%, #f8dfca 0%, transparent 45%),
    radial-gradient(1000px 400px at 100% 0%, #d8e4ff 0%, transparent 40%),
    var(--bg);
  line-height: 1.65;
}

h1,
h2,
h3,
.brand {
  font-family: "STKaiti", "KaiTi", "Kaiti SC", serif;
  letter-spacing: 0.02em;
}

.container {
  width: min(1120px, 92%);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(8px);
  background: rgba(246, 242, 234, 0.82);
  border-bottom: 1px solid var(--line);
}

.nav-wrap {
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  font-size: 1.55rem;
  color: var(--brand);
  font-weight: 700;
  text-decoration: none;
}

.main-nav {
  display: flex;
  gap: 1.2rem;
}

.main-nav a {
  text-decoration: none;
  color: var(--ink);
  font-weight: 600;
}

.menu-btn {
  display: none;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  padding: 0.35rem 0.85rem;
}

.hero {
  padding: 4.6rem 0 3.2rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.95fr;
  gap: 1.7rem;
  align-items: stretch;
}

.eyebrow {
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

h1 {
  margin: 0.3rem 0 1rem;
  line-height: 1.18;
  font-size: clamp(2.05rem, 4.1vw, 3.45rem);
}

.hero-text {
  max-width: 50ch;
}

.hero-actions {
  display: flex;
  gap: 0.8rem;
  margin-top: 1.5rem;
}

.btn {
  display: inline-block;
  text-decoration: none;
  border: 0;
  border-radius: 10px;
  padding: 0.72rem 1.2rem;
  font-weight: 700;
  cursor: pointer;
}

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

.btn-light {
  background: #fff;
  border: 1px solid var(--line);
  color: var(--ink);
}

.hero-card {
  padding: 1.4rem;
  border-radius: 16px;
  background: linear-gradient(160deg, #0b2a5c 0%, #123a7c 70%);
  color: #eff3ff;
  box-shadow: 0 16px 36px rgba(14, 36, 79, 0.28);
}

.card-title {
  font-weight: 700;
  margin-top: 0;
}

.hero-card ul {
  margin: 0.65rem 0 0;
  padding-left: 1.2rem;
}

.hero-note {
  margin-top: 1rem;
  color: #d9e4ff;
  font-size: 0.95rem;
}

.section {
  padding: 3.4rem 0;
}

.section.alt {
  border-block: 1px solid var(--line);
  background: linear-gradient(180deg, #fff7ef, #fffdf9);
}

h2 {
  margin: 0 0 1rem;
  font-size: clamp(1.75rem, 3.2vw, 2.5rem);
}

.two-col {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 1.6rem;
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.8rem;
}

.stat-item,
.card,
.case-item,
.step,
.contact-form {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
}

.stat-item {
  text-align: center;
  padding: 1rem;
}

.stat-item span {
  display: block;
  font-size: 1.5rem;
  color: var(--brand);
  font-weight: 800;
}

.cards,
.case-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.card,
.case-item {
  padding: 1.1rem;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.9rem;
}

.step {
  padding: 1rem;
  position: relative;
}

.step span {
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 800;
}

.contact {
  background: linear-gradient(180deg, transparent, var(--accent-soft) 58%);
}

.contact-form {
  padding: 1rem;
}

.contact-form label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.8rem;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  margin-top: 0.3rem;
  border: 1px solid #cdbca5;
  border-radius: 8px;
  padding: 0.65rem;
  font: inherit;
  background: #fff;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.2rem 0 2rem;
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: 0.95rem;
}

.footer-grid a {
  color: var(--brand);
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 520ms ease, transform 520ms ease;
}

.reveal.show {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 980px) {
  .hero-grid,
  .two-col,
  .cards,
  .case-list,
  .timeline,
  .stats {
    grid-template-columns: 1fr;
  }

  .menu-btn {
    display: inline-block;
  }

  .main-nav {
    position: absolute;
    top: 70px;
    right: 4%;
    display: none;
    flex-direction: column;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 0.8rem;
    min-width: 180px;
  }

  .main-nav.open {
    display: flex;
  }
}