:root {
  --ink: #0f1115;
  --muted: #626873;
  --paper: #f7f6f1;
  --panel: #ffffff;
  --line: #deddd6;
  --accent: #ff3d00;
  --max: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", sans-serif;
  line-height: 1.6;
}
a { color: inherit; }
.shell { width: min(calc(100% - 40px), var(--max)); margin: 0 auto; }
.nav {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}
.brand { display: inline-flex; gap: 10px; align-items: center; text-decoration: none; font-weight: 760; letter-spacing: -0.02em; }
.brand em { color: var(--muted); font-style: normal; font-weight: 560; }
.brand-mark { display: grid; place-items: center; width: 28px; height: 28px; background: var(--ink); color: #fff; border-radius: 7px; font-size: 11px; }
.status { display: inline-flex; align-items: center; gap: 8px; color: var(--muted); font-size: 13px; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: #18a957; box-shadow: 0 0 0 4px rgba(24,169,87,.12); }
.hero { padding: 104px 0 92px; border-bottom: 1px solid var(--line); }
.eyebrow, .section-kicker { font-size: 12px; font-weight: 800; letter-spacing: .13em; color: var(--accent); }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 980px; margin-bottom: 28px; font-size: clamp(46px, 8vw, 104px); line-height: .98; letter-spacing: -.065em; font-weight: 820; }
.lead { max-width: 720px; margin-bottom: 34px; color: var(--muted); font-size: clamp(18px, 2.2vw, 24px); }
.cta-row { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.primary-cta { display: inline-flex; min-height: 56px; align-items: center; justify-content: center; gap: 24px; padding: 0 22px; border-radius: 14px; background: var(--ink); color: #fff; text-decoration: none; font-weight: 760; transition: transform .16s ease, opacity .16s ease; }
.primary-cta:hover { transform: translateY(-2px); }
.primary-cta:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }
.microcopy { color: var(--muted); font-size: 13px; }
.flow { padding: 84px 0; border-bottom: 1px solid var(--line); }
.flow > h2, .guardrail h2, .bottom-cta h2 { max-width: 760px; margin-bottom: 36px; font-size: clamp(30px, 4vw, 52px); line-height: 1.08; letter-spacing: -.04em; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.step { min-height: 260px; padding: 26px; background: var(--panel); border: 1px solid var(--line); border-radius: 18px; }
.step-num { display: inline-block; margin-bottom: 64px; color: var(--muted); font-size: 12px; font-weight: 780; }
.step h3 { margin-bottom: 10px; font-size: 21px; letter-spacing: -.02em; }
.step p { color: var(--muted); font-size: 15px; }
.guardrail { display: grid; grid-template-columns: 1fr .9fr; gap: 72px; padding: 84px 0; border-bottom: 1px solid var(--line); align-items: start; }
.guardrail p:last-child { color: var(--muted); font-size: 17px; }
.bottom-cta { display: flex; align-items: end; justify-content: space-between; gap: 32px; padding: 84px 0 104px; }
.bottom-cta h2 { margin-bottom: 0; }
.footer { border-top: 1px solid var(--line); padding: 24px 20px 36px; color: var(--muted); text-align: center; font-size: 12px; }

@media (max-width: 760px) {
  .shell { width: min(calc(100% - 28px), var(--max)); }
  .nav { min-height: 64px; }
  .status { display: none; }
  .hero { padding: 72px 0 68px; }
  h1 { font-size: clamp(44px, 15vw, 70px); }
  .primary-cta { width: 100%; }
  .microcopy { width: 100%; text-align: center; }
  .flow { padding: 64px 0; }
  .steps { grid-template-columns: 1fr; }
  .step { min-height: 220px; }
  .step-num { margin-bottom: 44px; }
  .guardrail { grid-template-columns: 1fr; gap: 12px; padding: 64px 0; }
  .bottom-cta { align-items: stretch; flex-direction: column; padding: 64px 0 80px; }
}