:root {
  --ink: #10283d;
  --muted: #61717d;
  --paper: #f7f3ea;
  --card: #fffdf8;
  --line: rgba(16, 40, 61, 0.14);
  --blue: #28597f;
  --gold: #b86f21;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    radial-gradient(circle at 90% 4%, rgba(184, 111, 33, 0.16), transparent 24rem),
    var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

.shell {
  width: min(1140px, calc(100% - 36px));
  margin: 0 auto;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.mark {
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border-radius: 13px;
  background: var(--ink);
  color: #fff;
  font-family: "Songti SC", serif;
  font-size: 28px;
}

.brand strong { display: block; font-size: 18px; }
.brand small { display: block; margin-top: 2px; color: var(--muted); font-size: 11px; }

.nav-cta,
.button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
  border: 1px solid var(--ink);
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
}

.nav-cta { background: var(--ink); color: #fff; }

.hero {
  padding: 72px 0 46px;
  text-align: center;
}

.eyebrow {
  color: var(--gold);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.18em;
}

.hero h1 {
  max-width: 900px;
  margin: 20px auto 22px;
  font-family: "Songti SC", STSong, serif;
  font-size: clamp(46px, 7vw, 84px);
  line-height: 1.16;
  letter-spacing: -0.035em;
}

.hero h1 em { color: var(--gold); font-style: normal; }

.hero > p {
  max-width: 760px;
  margin: 0 auto;
  color: var(--muted);
  font-size: 19px;
  line-height: 1.8;
}

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

.button.primary { background: var(--ink); color: #fff; }
.button.secondary { background: transparent; }

.preview {
  overflow: hidden;
  margin-top: 44px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: #fff;
  box-shadow: 0 30px 90px rgba(18, 46, 69, 0.17);
}

.preview img { display: block; width: 100%; }

.section {
  padding: 72px 0;
}

.section-head {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-head h2 {
  margin: 12px 0;
  font-family: "Songti SC", STSong, serif;
  font-size: clamp(34px, 5vw, 54px);
  line-height: 1.25;
}

.section-head p {
  margin: 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.75;
}

.features {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.feature {
  min-height: 230px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--card);
}

.feature b {
  color: var(--gold);
  font-family: Georgia, serif;
  font-size: 18px;
}

.feature h3 {
  margin: 42px 0 12px;
  font-family: "Songti SC", serif;
  font-size: 28px;
}

.feature p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.step {
  padding: 24px;
  border-radius: 18px;
  background: var(--ink);
  color: #fff;
}

.step b {
  display: block;
  color: #e8bf86;
  font-family: Georgia, serif;
  font-size: 34px;
}

.step h3 { margin: 28px 0 8px; font-size: 20px; }
.step p { margin: 0; color: #d5e0e8; font-size: 14px; line-height: 1.65; }

.pricing {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.plan {
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--card);
}

.plan.hot {
  border-color: rgba(184, 111, 33, 0.45);
  background: linear-gradient(145deg, #fffaf0, #f1d9b5);
}

.plan h3 { margin: 0; color: var(--muted); font-size: 16px; }

.price {
  margin: 14px 0 8px;
  font-family: Georgia, serif;
  font-size: 62px;
}

.price small { font-family: inherit; color: var(--muted); font-size: 16px; }

.plan ul {
  margin: 22px 0;
  padding: 0;
  list-style: none;
  color: var(--muted);
  line-height: 1.9;
}

.plan li::before { content: "✓"; margin-right: 8px; color: var(--gold); }

.contact {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 22px;
  align-items: center;
  padding: 34px;
  border-radius: 24px;
  background: var(--ink);
  color: #fff;
}

.contact h2 {
  margin: 0 0 10px;
  font-family: "Songti SC", serif;
  font-size: 38px;
}

.contact p { margin: 0; color: #d6e0e8; line-height: 1.75; }

.qq-card {
  padding: 24px;
  border-radius: 18px;
  background: #fff;
  color: var(--ink);
  text-align: center;
}

.qq-card small { display: block; color: var(--muted); }

.qq-number {
  display: block;
  margin: 10px 0 14px;
  font-family: Georgia, serif;
  font-size: 34px;
  font-weight: 700;
}

.faq {
  display: grid;
  gap: 12px;
}

.faq details {
  padding: 18px 22px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--card);
}

.faq summary { cursor: pointer; font-weight: 700; }
.faq p { margin: 12px 0 0; color: var(--muted); line-height: 1.7; }

.disclaimer {
  padding: 34px 0 54px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
  line-height: 1.8;
}

.disclaimer strong { font-weight: 500; }

.legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.legal-links a {
  color: var(--ink);
  text-underline-offset: 3px;
}

@media (max-width: 760px) {
  .nav-cta { padding: 0 14px; font-size: 13px; }
  .hero { padding-top: 44px; }
  .hero > p { font-size: 16px; }
  .features,
  .pricing,
  .steps,
  .contact { grid-template-columns: 1fr; }
  .feature { min-height: 0; }
  .section { padding: 52px 0; }
  .preview { margin-top: 30px; border-radius: 16px; }
  .contact h2 { font-size: 32px; }
}