:root {
  color-scheme: light;
  --ink: #121820;
  --paper: #f3f0e9;
  --line: #c9c3b8;
  --accent: #ff5c35;
  --blue: #174b70;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Noto Sans Thai", "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.75;
}
a { color: inherit; text-underline-offset: 4px; }
main { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
nav {
  min-height: 88px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--line);
  gap: 24px;
}
nav a { text-decoration: none; font-weight: 650; }
.brand { font-size: 1.25rem; letter-spacing: -.04em; }
.brand span { color: var(--accent); }
.hero { padding: 9vw 0 8vw; max-width: 1000px; }
.eyebrow, .section-no { color: var(--accent); font-size: .78rem; font-weight: 800; letter-spacing: .15em; }
h1 { font-size: clamp(3.5rem, 9vw, 8.4rem); letter-spacing: -.07em; line-height: .88; margin: 24px 0 40px; font-weight: 800; }
h1 em { color: var(--blue); font-family: Georgia, "Times New Roman", serif; font-weight: 400; }
.lead { max-width: 770px; font-size: clamp(1.1rem, 2vw, 1.45rem); line-height: 1.65; }
.status { margin-top: 36px; display: inline-flex; align-items: center; gap: 10px; font-weight: 650; }
.status span { width: 10px; height: 10px; border-radius: 50%; background: #15805d; box-shadow: 0 0 0 5px rgba(21,128,93,.12); }
.flow, .guardrails { padding: 80px 0; border-top: 1px solid var(--line); }
.flow { display: grid; grid-template-columns: 1fr 1.5fr; gap: 64px; }
h2 { font-size: clamp(2rem, 4vw, 3.4rem); line-height: 1.08; letter-spacing: -.05em; margin: 8px 0 28px; }
.flow ol { margin: 0; padding: 0; list-style: none; counter-reset: steps; }
.flow li { counter-increment: steps; display: grid; grid-template-columns: 54px 1fr; gap: 0 18px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.flow li::before { content: "0" counter(steps); color: var(--accent); font-weight: 800; grid-row: span 2; }
.flow strong { font-size: 1.12rem; }
.flow span { color: #4e555b; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.cards article { min-height: 210px; padding: 28px; border: 1px solid var(--line); background: rgba(255,255,255,.35); }
.cards h3 { margin: 0 0 24px; font-size: 1.25rem; }
.cards p { color: #4e555b; margin: 0; }
.policy { max-width: 850px; padding: 90px 0 50px; }
.policy h1 { font-size: clamp(3.5rem, 8vw, 7rem); }
.policy .updated { color: #5b6268; margin-bottom: 70px; }
.policy section { padding: 32px 0; border-top: 1px solid var(--line); }
.policy section h2 { font-size: 1.55rem; letter-spacing: -.03em; }
.policy li { margin-bottom: 8px; }
footer { border-top: 1px solid var(--line); padding: 36px 0 50px; display: flex; justify-content: space-between; gap: 28px; color: #4e555b; }
footer div { display: flex; gap: 24px; }

@media (max-width: 760px) {
  main { width: min(100% - 28px, 680px); }
  nav { min-height: 74px; align-items: flex-start; padding: 20px 0; }
  nav > a:last-child { font-size: .9rem; text-align: right; }
  .hero { padding: 80px 0 70px; }
  .flow { grid-template-columns: 1fr; gap: 18px; }
  .cards { grid-template-columns: 1fr; }
  .cards article { min-height: 0; }
  footer { flex-direction: column; }
  footer div { flex-direction: column; gap: 8px; }
}