:root {
  --green: #0b4a3b;
  --green-deep: #07362c;
  --green-soft: #dce9e2;
  --yellow: #f3bf31;
  --ink: #17352e;
  --paper: #f6f2e8;
  --white: #fffdf8;
  --line: rgba(11, 74, 59, 0.22);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", "Noto Sans JP", sans-serif;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}

a { color: inherit; }

img { display: block; max-width: 100%; }

.site-header {
  min-height: 84px;
  padding: 12px clamp(20px, 5vw, 76px);
  background: var(--white);
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

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

.brand-mark {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: var(--white);
  background: var(--green);
  font-size: 22px;
  font-weight: 900;
}

.brand strong,
.brand small { display: block; }

.brand strong { font-size: 17px; line-height: 1.25; }
.brand small { margin-top: 3px; color: #477067; font-size: 12px; letter-spacing: .08em; }

.view-only {
  padding: 7px 15px;
  border: 1px solid var(--green);
  border-radius: 999px;
  font-size: 13px;
  letter-spacing: .08em;
  white-space: nowrap;
}

main { overflow: hidden; }

.hero,
.flow,
.gallery,
.cta {
  padding: clamp(56px, 8vw, 112px) clamp(22px, 7vw, 112px);
}

.hero {
  min-height: 680px;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(300px, .68fr);
  align-items: center;
  gap: clamp(40px, 7vw, 112px);
  color: var(--white);
  background:
    radial-gradient(circle at 16% 8%, rgba(243,191,49,.18), transparent 32%),
    linear-gradient(135deg, var(--green-deep), var(--green));
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--yellow);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: .16em;
}

h1,
h2,
h3,
p { overflow-wrap: anywhere; }

h1 {
  margin: 0;
  max-width: 13em;
  font-size: clamp(44px, 5vw, 74px);
  font-weight: 900;
  letter-spacing: -.055em;
  line-height: 1.12;
}

.lead {
  max-width: 42em;
  margin: 28px 0 0;
  font-size: clamp(18px, 1.5vw, 22px);
}

.notice {
  margin-top: 30px;
  padding: 18px 20px;
  display: grid;
  gap: 3px;
  border-left: 5px solid var(--yellow);
  background: rgba(255,255,255,.09);
}

.notice strong { font-size: 17px; }
.notice span { font-size: 14px; color: rgba(255,255,255,.78); }

.hero-sheet {
  margin: 0;
  transform: rotate(1.8deg);
}

.hero-sheet img {
  width: min(100%, 440px);
  margin-inline: auto;
  max-height: 560px;
  object-fit: cover;
  object-position: top;
  border: 12px solid var(--white);
  box-shadow: 18px 20px 0 var(--yellow);
}

.hero-sheet figcaption {
  margin-top: 28px;
  color: rgba(255,255,255,.74);
  font-size: 13px;
  text-align: center;
}

.flow { background: var(--white); }

.section-heading { max-width: 880px; }

.section-heading h2,
.cta h2 {
  margin: 0;
  font-size: clamp(32px, 4.2vw, 58px);
  font-weight: 900;
  letter-spacing: -.045em;
  line-height: 1.2;
}

.section-heading > p:last-child { margin-top: 18px; color: #4b6a63; }

.flow-grid {
  margin: 52px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  list-style: none;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.flow-grid li {
  min-height: 270px;
  padding: 32px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.flow-grid span { color: #c38b00; font-size: 14px; font-weight: 900; }
.flow-grid h3 { margin: 34px 0 10px; font-size: 28px; font-weight: 900; }
.flow-grid p { margin: 0; color: #4b6a63; font-size: 16px; }

.gallery { background: var(--paper); }

.sheet-grid {
  margin-top: 48px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.sheet-grid figure {
  margin: 0;
  padding: 14px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 18px 44px rgba(7,54,44,.08);
}

.sheet-grid img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: top;
  border: 1px solid #ddd9cf;
  background: white;
}

.sheet-grid figcaption { padding: 18px 6px 8px; }
.sheet-grid strong,
.sheet-grid span { display: block; }
.sheet-grid strong { font-size: 20px; }
.sheet-grid span { margin-top: 5px; color: #5c736d; font-size: 14px; }

.cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 40px;
  color: var(--white);
  background: var(--green);
}

.cta p:last-child { max-width: 42em; margin: 18px 0 0; color: rgba(255,255,255,.78); }

.cta a {
  min-width: 270px;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border: 2px solid var(--white);
  border-radius: 999px;
  text-decoration: none;
  font-weight: 900;
  white-space: nowrap;
}

footer {
  padding: 24px clamp(22px, 7vw, 112px);
  color: #577069;
  background: var(--white);
  font-size: 13px;
}

footer p { margin: 0; }

@media (max-width: 860px) {
  body { font-size: 17px; }
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .hero-sheet { width: min(84%, 420px); margin-inline: auto; }
  .flow-grid,
  .sheet-grid { grid-template-columns: 1fr; }
  .flow-grid li { min-height: auto; }
  .cta { grid-template-columns: 1fr; align-items: start; }
  .cta a { min-width: 0; width: min(100%, 360px); }
}

@media (max-width: 520px) {
  .site-header { min-height: 74px; padding-inline: 16px; }
  .brand-mark { width: 42px; height: 42px; }
  .brand strong { font-size: 15px; }
  .brand small { font-size: 10px; }
  .view-only { padding: 5px 10px; font-size: 11px; }
  .hero,
  .flow,
  .gallery,
  .cta { padding-inline: 20px; }
  h1 { font-size: clamp(38px, 12vw, 54px); }
  .hero-sheet img { max-height: 430px; border-width: 8px; box-shadow: 10px 12px 0 var(--yellow); }
  .flow-grid li { padding: 26px 22px; }
}