:root {
  --paper: #f2ede3;
  --paper-deep: #e8e1d3;
  --ink: #1d1b18;
  --text: #4a453d;
  --label: #635c52;
  --vermilion: #b23a26;
  --mincho: 'Hiragino Mincho ProN', 'Yu Mincho', 'Noto Serif JP', serif;
  --gothic: 'Hiragino Sans', 'Noto Sans JP', 'Yu Gothic', sans-serif;
  --gutter: 96px;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: auto; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--gothic);
  font-kerning: normal;
  line-height: 1.8;
  overflow-x: hidden;
}

h1, h2, h3, p, dl, dd { margin: 0; }

/* 見出し・ロゴは明朝＋約物の詰め（palt）。本文は詰めない */
h1, h2, h3, .logo-text, .contact-mail {
  font-family: var(--mincho);
  font-feature-settings: "palt";
}

a { color: var(--ink); text-decoration: none; }
a:hover { color: var(--vermilion); }
a:focus-visible {
  outline: 2px solid var(--vermilion);
  outline-offset: 4px;
}

/* header */
.site-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 36px var(--gutter);
  border-bottom: 1px solid var(--ink);
}
.logo { display: flex; align-items: center; gap: 14px; }
.logo-mark {
  width: 34px;
  height: 34px;
  flex: none;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--vermilion);
  color: var(--paper);
  font-family: var(--mincho);
  font-size: 15px;
  line-height: 1;
}
.logo-text { font-size: 18px; letter-spacing: .18em; }
.site-nav { display: flex; gap: 44px; font-size: 13px; letter-spacing: .12em; }
.site-nav a { padding: 6px 0; }

/* hero */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  border-bottom: 1px solid var(--ink);
}
.hero-text { padding: 96px var(--gutter) 88px; border-right: 1px solid var(--ink); }
.kicker { margin-bottom: 40px; font-size: 12px; letter-spacing: .3em; color: var(--label); }
.hero h1 {
  font-weight: 600;
  font-size: 76px;
  line-height: 1.35;
  letter-spacing: .06em;
}
.hero-en { margin-top: 44px; font-size: 15px; color: var(--text); letter-spacing: .04em; }

.hero-art {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 320px;
  background: var(--paper-deep);
  overflow: hidden;
}
.art-card {
  position: relative;
  width: 220px;
  height: 308px;
  border: 1.5px solid var(--ink);
  border-radius: 10px;
  background: var(--paper);
  transform: rotate(-4deg);
}
.art-title {
  position: absolute;
  left: 16px; right: 16px; top: 16px;
  height: 44px;
  border: 1px solid var(--ink);
  border-radius: 2px;
}
.art-image {
  position: absolute;
  left: 16px; right: 16px; top: 74px; bottom: 16px;
  border: 1px solid var(--ink);
  border-radius: 3px;
}
.art-seal {
  position: absolute;
  right: -18px;
  bottom: 36px;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--vermilion);
  color: var(--paper);
  font-family: var(--mincho);
  font-size: 18px;
  line-height: 1;
  transform: rotate(4deg);
}
.art-vertical {
  position: absolute;
  left: 32px;
  bottom: 24px;
  font-size: 11px;
  letter-spacing: .3em;
  color: var(--label);
  writing-mode: vertical-rl;
}

/* sections */
.sec {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  border-bottom: 1px solid var(--ink);
}
.sec-biz { grid-template-columns: 280px minmax(0, 1fr) minmax(0, 1fr); }
.sec-head { padding: 48px 0 48px var(--gutter); }
.sec-num { font-size: 12px; letter-spacing: .24em; color: var(--vermilion); }
.sec h2 {
  margin-top: 8px;
  font-weight: 600;
  font-size: 26px;
  line-height: 1.5;
  letter-spacing: .1em;
}
.biz-item { padding: 48px; border-left: 1px solid var(--ink); }
.biz-item h3 {
  margin-bottom: 10px;
  font-weight: 600;
  font-size: 22px;
  letter-spacing: .1em;
}
.biz-item p { font-size: 14px; color: var(--text); }

.sec-content { border-left: 1px solid var(--ink); min-width: 0; }
.info {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr);
  row-gap: 14px;
  padding: 40px var(--gutter) 40px 48px;
  font-size: 15px;
}
.info dt { color: var(--label); }
.info dd { overflow-wrap: anywhere; }

.contact { padding: 40px var(--gutter) 48px 48px; font-size: 15px; }
.contact-mail { margin-top: 24px; font-size: 28px; line-height: 1.5; letter-spacing: .04em; }
.contact-mail a { overflow-wrap: anywhere; border-bottom: 1px solid var(--vermilion); }
.contact-en { margin-top: 16px; font-size: 13px; color: var(--label); letter-spacing: .04em; }

/* footer */
.site-foot {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 28px var(--gutter);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--label);
}

/* responsive */
@media (max-width: 1100px) {
  :root { --gutter: 48px; }
  .hero h1 { font-size: clamp(40px, 6.4vw, 76px); }
  .hero-text { padding-top: 72px; padding-bottom: 64px; }
  .sec, .sec-biz { grid-template-columns: 200px minmax(0, 1fr); }
  .sec-biz .biz-item:last-child { grid-column: 2; border-top: 1px solid var(--ink); }
  .biz-item { padding: 40px 32px; }
}

@media (max-width: 820px) {
  .site-head { padding-top: 24px; padding-bottom: 24px; }
  .site-nav { gap: 24px; }
  .hero { grid-template-columns: minmax(0, 1fr); }
  .hero-text { border-right: 0; border-bottom: 1px solid var(--ink); padding-top: 56px; padding-bottom: 56px; }
  .hero-art { height: 400px; min-height: 0; }
  .sec, .sec-biz { grid-template-columns: minmax(0, 1fr); }
  .sec-head { padding: 32px var(--gutter) 24px; }
  .sec-biz .biz-item:last-child { grid-column: auto; }
  .biz-item, .sec-content { border-left: 0; border-top: 1px solid var(--ink); }
  .biz-item { padding: 32px var(--gutter); }
  .info { grid-template-columns: 96px minmax(0, 1fr); padding: 28px var(--gutter); }
  .contact { padding: 28px var(--gutter) 40px; }
  .contact-mail { font-size: 24px; }
}

@media (max-width: 520px) {
  :root { --gutter: 24px; }
  .site-head { flex-wrap: wrap; row-gap: 12px; }
  .site-nav { width: 100%; gap: 20px; font-size: 12px; }
  .hero-text { padding-top: 40px; padding-bottom: 44px; }
  .kicker { margin-bottom: 28px; }
  .hero-en { margin-top: 28px; }
  .info { grid-template-columns: minmax(0, 1fr); row-gap: 4px; }
  .info dd { margin-bottom: 12px; }
  .contact-mail { font-size: 20px; }
  .site-foot { flex-direction: column; gap: 4px; }
}