:root {
  --ink: #10233c;
  --ink-soft: #4a5b70;
  --paper: #f4f1e9;
  --surface: #fffdf8;
  --line: #d8d9d4;
  --blue: #0d4873;
  --blue-dark: #082f4d;
  --cyan: #8bcbd6;
  --gold: #d9a84e;
  --shadow: 0 24px 70px rgba(16, 35, 60, 0.13);
  color-scheme: light;
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 83% 4%, rgba(139, 203, 214, 0.25), transparent 25rem),
    var(--paper);
  line-height: 1.7;
}
a { color: inherit; }

.site-header {
  width: min(1180px, calc(100% - 40px));
  min-height: 78px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(16, 35, 60, 0.14);
}
.brand { display: flex; align-items: center; gap: 11px; text-decoration: none; font-weight: 750; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  color: white;
  background: var(--ink);
  border-radius: 10px 3px 10px 3px;
}
nav { display: flex; gap: 28px; }
nav a { color: var(--ink-soft); text-decoration: none; font-size: 14px; }
nav a:hover { color: var(--blue); }

.section-shell { width: min(1180px, calc(100% - 40px)); margin-inline: auto; }
.hero {
  min-height: 660px;
  padding: 84px 0 76px;
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(320px, 0.65fr);
  gap: 72px;
  align-items: center;
}
.eyebrow {
  margin: 0 0 12px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
h1, h2, h3, p { text-wrap: pretty; }
h1 { margin: 0; max-width: 760px; font-size: clamp(48px, 7vw, 88px); line-height: 1.02; letter-spacing: -0.05em; }
.hero-lead { max-width: 700px; margin: 28px 0 0; color: var(--ink-soft); font-size: clamp(18px, 2vw, 22px); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.button {
  min-height: 48px;
  padding: 0 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 9px;
  font-weight: 750;
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease;
}
.button:hover { transform: translateY(-2px); }
.button-primary { color: white; background: var(--blue); box-shadow: 0 12px 28px rgba(13, 72, 115, 0.22); }
.button-secondary { border-color: rgba(16, 35, 60, 0.25); background: rgba(255, 255, 255, 0.5); }
.trust-list { display: flex; flex-wrap: wrap; gap: 18px; margin: 28px 0 0; padding: 0; color: var(--ink-soft); list-style: none; font-size: 14px; }
.trust-list li::before { content: "✓"; margin-right: 7px; color: var(--blue); font-weight: 900; }

.offer-card { padding: 34px; background: var(--surface); border: 1px solid rgba(16, 35, 60, 0.12); border-radius: 20px 6px 20px 6px; box-shadow: var(--shadow); }
.card-label { margin: 0; color: var(--ink-soft); font-weight: 700; }
.price { margin: 6px 0 2px; font-size: 72px; font-weight: 850; line-height: 1; letter-spacing: -0.06em; }
.price span { margin-right: 4px; font-size: 28px; color: var(--gold); vertical-align: 24px; }
.offer-card > p:not(.card-label):not(.fine-print) { color: var(--ink-soft); font-size: 14px; }
.offer-divider { height: 1px; margin: 26px 0; background: var(--line); }
.offer-card dl { margin: 0; }
.offer-card dl div { display: flex; justify-content: space-between; gap: 20px; padding: 9px 0; }
.offer-card dt { color: var(--ink-soft); }
.offer-card dd { margin: 0; font-weight: 750; }
.fine-print { margin: 22px 0 0; padding-top: 18px; border-top: 1px dashed var(--line); color: var(--ink-soft); font-size: 12px; }

.signal-strip { padding: 18px 40px; display: flex; justify-content: center; align-items: center; gap: 24px; color: white; background: var(--ink); }
.signal-strip p { margin: 0; font-weight: 650; }
.signal-strip span { width: 4px; height: 4px; background: var(--cyan); border-radius: 50%; }

.content-section { padding-top: 110px; padding-bottom: 110px; }
.section-heading { max-width: 780px; margin-bottom: 48px; }
.section-heading.compact { max-width: 610px; }
.section-heading h2 { margin: 0; font-size: clamp(34px, 4.5vw, 56px); line-height: 1.12; letter-spacing: -0.035em; }
.section-heading > p:last-child { color: var(--ink-soft); font-size: 18px; }
.deliverable-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.deliverable-grid article { min-height: 270px; padding: 28px; background: rgba(255,255,255,0.36); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.deliverable-grid article:nth-child(2) { background: rgba(139, 203, 214, 0.12); }
.step-number { color: var(--blue); font: 800 12px/1 monospace; letter-spacing: 0.1em; }
.deliverable-grid h3 { margin: 68px 0 10px; font-size: 21px; }
.deliverable-grid p { margin: 0; color: var(--ink-soft); font-size: 15px; }

.process-section { color: white; background: var(--blue-dark); }
.process-section .eyebrow { color: var(--cyan); }
.process-section .section-shell { display: grid; grid-template-columns: 0.7fr 1.3fr; gap: 80px; }
.process-list { margin: 0; padding: 0; list-style: none; }
.process-list li { display: grid; grid-template-columns: 52px 1fr; gap: 22px; padding: 26px 0; border-bottom: 1px solid rgba(255,255,255,0.17); }
.process-list li > span { display: grid; place-items: center; width: 42px; height: 42px; border: 1px solid rgba(255,255,255,0.4); border-radius: 50%; font-weight: 800; }
.process-list h3 { margin: 0 0 4px; font-size: 21px; }
.process-list p { margin: 0; color: rgba(255,255,255,0.68); }

.safety-layout { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 110px; align-items: center; }
.safety-card { padding: 34px; background: var(--surface); border-left: 5px solid var(--gold); box-shadow: var(--shadow); }
.safety-card h3 { margin-top: 0; }
.safety-card ul { margin-bottom: 0; padding-left: 1.2em; color: var(--ink-soft); }

.faq-section { display: grid; grid-template-columns: 0.65fr 1.35fr; gap: 80px; }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { padding: 22px 0; cursor: pointer; font-weight: 750; list-style-position: outside; }
.faq-list details p { margin: -6px 0 22px; color: var(--ink-soft); }

.cta-section { width: min(1180px, calc(100% - 40px)); margin: 0 auto 36px; padding: 54px; display: flex; align-items: center; justify-content: space-between; gap: 40px; color: white; background: var(--blue); border-radius: 22px 7px 22px 7px; }
.cta-section .eyebrow { color: var(--cyan); }
.cta-section h2 { max-width: 760px; margin: 0; font-size: clamp(30px, 4vw, 48px); line-height: 1.15; }
.cta-section p:last-child { margin-bottom: 0; color: rgba(255,255,255,0.72); }
.button-light { flex: 0 0 auto; color: var(--ink); background: white; }

footer { width: min(1180px, calc(100% - 40px)); margin: 0 auto; padding: 24px 0 40px; display: flex; justify-content: space-between; gap: 20px; color: var(--ink-soft); font-size: 13px; }
footer p { margin: 0; }

@media (max-width: 900px) {
  nav { display: none; }
  .hero { grid-template-columns: 1fr; gap: 42px; padding-top: 64px; }
  .offer-card { max-width: 560px; }
  .deliverable-grid { grid-template-columns: repeat(2, 1fr); }
  .process-section .section-shell, .safety-layout, .faq-section { grid-template-columns: 1fr; gap: 34px; }
  .cta-section { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 560px) {
  .section-shell, .site-header, footer, .cta-section { width: min(100% - 28px, 1180px); }
  .hero { min-height: auto; padding: 52px 0 58px; }
  h1 { font-size: 47px; }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .button { width: 100%; }
  .offer-card { padding: 26px; }
  .signal-strip { padding-inline: 20px; flex-wrap: wrap; gap: 10px 16px; }
  .signal-strip span:nth-of-type(2) { display: none; }
  .content-section { padding-top: 76px; padding-bottom: 76px; }
  .deliverable-grid { grid-template-columns: 1fr; }
  .deliverable-grid article { min-height: 220px; }
  .deliverable-grid h3 { margin-top: 48px; }
  .cta-section { margin-bottom: 18px; padding: 34px 24px; }
  footer { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button { transition: none; }
}