:root {
  --paper: #fffdf9;
  --soft: #f5f1eb;
  --white: #ffffff;
  --ink: #24231f;
  --muted: #6f6a61;
  --line: rgba(36, 35, 31, .16);
  --deep: #2f2a26;
  --gold: #b69b6d;
  --shadow: 0 20px 55px rgba(45, 38, 30, .1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Yu Mincho", "Hiragino Mincho ProN", "Noto Serif JP", serif;
  line-height: 1.78;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.site-header {
  align-items: center;
  background: rgba(255, 253, 249, .95);
  border-bottom: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  left: 0;
  min-height: 70px;
  padding: 12px clamp(18px, 4vw, 58px);
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 30;
  backdrop-filter: blur(12px);
}
.brand { align-items: center; display: flex; gap: 12px; }
.brand-mark { height: 42px; width: 42px; }
.brand-mark img { height: 42px; object-fit: contain; width: 42px; }
.brand strong {
  display: block;
  font-family: Georgia, "Yu Mincho", serif;
  font-size: 18px;
  font-weight: 400;
  line-height: 1;
}
.brand small,
.eyebrow {
  color: var(--muted);
  display: block;
  font-family: Arial, sans-serif;
  font-size: 10px;
  margin-top: 5px;
  text-transform: uppercase;
}
.header-nav { align-items: center; display: flex; gap: clamp(12px, 2vw, 26px); font-size: 13px; }
.header-nav a { border-bottom: 1px solid transparent; padding: 6px 0; }
.header-nav a:hover { border-color: var(--gold); color: var(--deep); }
.menu-toggle { display: none; }

.hero {
  min-height: 720px;
  overflow: hidden;
  position: relative;
}
.hero > img {
  height: 100%;
  inset: 0;
  object-fit: cover;
  object-position: 58% center;
  position: absolute;
  width: 100%;
  filter: saturate(.95) contrast(.98) brightness(1.02);
}
.hero::after {
  background:
    linear-gradient(90deg, rgba(255,253,249,.98), rgba(255,253,249,.88) 45%, rgba(255,253,249,.18)),
    linear-gradient(0deg, rgba(255,253,249,.78), rgba(255,253,249,.08) 50%, rgba(255,253,249,.18));
  content: "";
  inset: 0;
  position: absolute;
}
.hero-copy {
  max-width: 680px;
  padding: 148px clamp(22px, 8vw, 112px) 78px;
  position: relative;
  z-index: 2;
}
.hero h1 {
  font-family: Georgia, "Yu Mincho", serif;
  font-size: 82px;
  font-weight: 400;
  line-height: .95;
  margin: 20px 0 18px;
}
.concept {
  font-size: 33px;
  line-height: 1.4;
  margin: 0 0 18px;
}
.future {
  color: #3d3832;
  font-size: 24px;
  line-height: 1.55;
  margin: 0 0 14px;
}
.lead {
  color: #51483f;
  font-size: 15px;
  margin: 0;
  max-width: 540px;
}
.hero-actions,
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}
.button,
.text-button {
  align-items: center;
  border: 1px solid rgba(47, 42, 38, .42);
  display: inline-flex;
  font-size: 14px;
  justify-content: center;
  min-height: 48px;
  min-width: 158px;
  padding: 0 24px;
  transition: background .2s ease, color .2s ease, border-color .2s ease;
}
.button:hover,
.text-button:hover { background: var(--deep); border-color: var(--deep); color: var(--white); }
.phone-note { color: var(--muted); font-size: 13px; margin: 16px 0 0; }
.phone-note a { border-bottom: 1px solid var(--line); color: var(--deep); }

.about-section,
.study-section,
.choice-section,
.catalog-section,
.flow-section,
.received-section,
.message-section,
.contact-band {
  margin: 0 auto;
  max-width: 1180px;
  padding: clamp(58px, 8vw, 96px) clamp(18px, 5vw, 46px);
}
.about-section,
.received-section {
  align-items: center;
  display: grid;
  gap: clamp(34px, 7vw, 76px);
  grid-template-columns: 1fr .68fr;
}
.section-copy p,
.study-intro p,
.choice-section p,
.section-head p,
.received-section p,
.contact-band p {
  color: var(--muted);
  font-size: 14px;
  margin: 16px 0 0;
}
h2 {
  color: var(--deep);
  font-size: 36px;
  font-weight: 400;
  line-height: 1.48;
  margin: 8px 0 0;
}
h3 { color: var(--deep); font-size: 20px; font-weight: 400; line-height: 1.45; margin: 0; }
.name-note {
  border-left: 1px solid var(--gold);
  color: var(--deep) !important;
  margin-top: 24px !important;
  padding-left: 18px;
}
.section-image img,
.received-section figure img {
  aspect-ratio: 4 / 5;
  box-shadow: var(--shadow);
  object-fit: cover;
  width: 100%;
}
figure { margin: 0; }

.study-section { background: var(--soft); max-width: none; }
.study-intro { margin: 0 auto; max-width: 880px; text-align: center; }
.study-list {
  display: grid;
  gap: 1px;
  grid-template-columns: repeat(3, 1fr);
  margin: 46px auto 0;
  max-width: 1100px;
}
.study-list article {
  background: rgba(255, 253, 249, .86);
  border: 1px solid var(--line);
  padding: 30px;
}
.study-list span,
.flow-list span,
.design-number {
  color: var(--gold);
  display: block;
  font-family: Georgia, serif;
  font-size: 13px;
  margin-bottom: 12px;
}
.study-list p,
.flow-list p,
.product-card dd {
  color: var(--muted);
  font-size: 13px;
  margin: 12px 0 0;
}

.choice-section {
  align-items: start;
  display: grid;
  gap: 34px;
  grid-template-columns: .72fr 1fr;
}
.choice-links { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.choice-links a {
  border: 1px solid var(--line);
  background: var(--white);
  color: #4d4841;
  font-size: 13px;
  padding: 10px 14px;
}

.section-head { margin-bottom: 30px; max-width: 820px; }
.catalog-note {
  border-left: 3px solid var(--gold);
  color: var(--muted);
  font-size: 12px;
  margin-top: 18px;
  padding: 8px 0 8px 14px;
}
.catalog-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr;
}
.product-card {
  background: var(--white);
  border: 1px solid var(--line);
  display: grid;
  grid-template-columns: 230px 1fr;
  min-width: 0;
  position: relative;
}
.product-card img {
  aspect-ratio: 1.08 / 1;
  height: 100%;
  object-fit: cover;
  width: 100%;
}
.product-card > div {
  display: grid;
  gap: 12px;
  grid-template-columns: minmax(180px, .36fr) 1fr auto;
  padding: 18px 20px;
}
.product-card dt {
  color: var(--deep);
  font-size: 12px;
  margin: 0;
}
.product-card dl {
  display: grid;
  gap: 6px 14px;
  grid-column: 2;
  grid-template-columns: 94px 1fr;
  margin: 0;
}
.product-card dd { margin: 0; }
.product-card .price-value {
  color: var(--deep);
  font-size: 16px;
  font-weight: 700;
}
.product-card .design-number {
  grid-column: 1;
  margin: 2px 0 0;
}
.product-card h3 {
  grid-column: 1;
  grid-row: 2;
}
.text-button {
  align-self: end;
  grid-column: 3;
  grid-row: 1 / span 2;
  min-width: 190px;
}

.flow-list {
  counter-reset: flow;
  display: grid;
  gap: 14px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.flow-list li {
  align-items: baseline;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 18px;
  grid-template-columns: 70px .34fr 1fr;
  padding: 20px 0;
}
.flow-list li:last-child { border-bottom: 1px solid var(--line); }

.received-section { grid-template-columns: .68fr 1fr; }
.notice-list {
  background: rgba(245, 241, 235, .72);
  border: 1px solid var(--line);
  color: #504b43;
  font-size: 14px;
  list-style: none;
  margin: 24px 0 0;
  padding: 18px 22px;
}
.notice-list li { border-bottom: 1px solid var(--line); padding: 11px 0; }
.notice-list li:last-child { border-bottom: 0; }

.message-section {
  background: var(--soft);
  max-width: none;
  text-align: center;
}
.message-section p {
  color: var(--deep);
  font-size: 34px;
  line-height: 1.55;
  margin: 0;
}
.message-section span {
  color: var(--muted);
  display: block;
  font-size: 15px;
  margin: 18px auto 0;
  max-width: 760px;
}

.contact-band {
  align-items: center;
  display: grid;
  gap: 30px;
  grid-template-columns: 1fr auto;
}
.contact-actions { justify-content: flex-end; margin: 0; max-width: 390px; }
.contact-actions .button { width: 100%; }

.site-footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  display: grid;
  gap: 18px;
  grid-template-columns: 1fr auto;
  padding: 34px clamp(18px, 5vw, 64px);
}
.site-footer strong { color: var(--deep); display: block; font-family: Georgia, serif; font-size: 20px; font-weight: 400; }
.site-footer p { font-size: 13px; margin: 6px 0 0; }
.footer-links { display: flex; gap: 18px; justify-content: flex-end; }
.footer-links a { border-bottom: 1px solid var(--line); font-size: 13px; }
.site-footer small { grid-column: 1 / -1; }

@media (max-width: 980px) {
  .menu-toggle {
    align-items: center;
    background: transparent;
    border: 1px solid var(--line);
    display: inline-flex;
    flex-direction: column;
    gap: 5px;
    height: 42px;
    justify-content: center;
    width: 42px;
  }
  .menu-toggle span { background: var(--deep); display: block; height: 1px; width: 18px; }
  .header-nav {
    background: rgba(255, 253, 249, .98);
    border-bottom: 1px solid var(--line);
    display: none;
    gap: 0;
    left: 0;
    padding: 10px 18px 18px;
    position: absolute;
    top: 70px;
    width: 100%;
  }
  .header-nav.is-open { display: grid; }
  .header-nav a { border-top: 1px solid var(--line); padding: 13px 0; }
  .about-section,
  .choice-section,
  .received-section,
  .contact-band { grid-template-columns: 1fr; }
  .study-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .product-card { grid-template-columns: 190px 1fr; }
  .product-card > div { grid-template-columns: 1fr; }
  .product-card dl { grid-column: 1; }
  .product-card .design-number,
  .product-card h3,
  .text-button { grid-column: 1; grid-row: auto; }
  .text-button { width: 100%; }
  .contact-actions { justify-content: stretch; max-width: none; }
}

@media (max-width: 680px) {
  body { line-height: 1.72; }
  .site-header { min-height: 64px; padding-block: 10px; }
  .brand small { display: none; }
  .header-nav { top: 64px; }
  .hero { min-height: 690px; }
  .hero::after {
    background:
      linear-gradient(180deg, rgba(255,253,249,.96), rgba(255,253,249,.86) 58%, rgba(255,253,249,.34)),
      linear-gradient(90deg, rgba(255,253,249,.88), rgba(255,253,249,.32));
  }
  .hero > img { object-position: 56% center; }
  .hero-copy { padding: 118px 18px 54px; }
  .hero h1 { font-size: 54px; }
  .concept { font-size: 26px; }
  .future { font-size: 20px; }
  h2 { font-size: 27px; }
  h3 { font-size: 18px; }
  .hero-actions .button,
  .contact-actions .button { width: 100%; }
  .about-section,
  .study-section,
  .choice-section,
  .catalog-section,
  .flow-section,
  .received-section,
  .message-section,
  .contact-band { padding-inline: 18px; }
  .study-intro { text-align: left; }
  .study-list { grid-template-columns: 1fr; }
  .product-card { grid-template-columns: 1fr; }
  .product-card img {
    aspect-ratio: 1.24 / 1;
    height: auto;
  }
  .product-card dl { grid-template-columns: 94px 1fr; }
  .study-list article { padding: 24px; }
  .flow-list li {
    gap: 4px;
    grid-template-columns: 1fr;
    padding: 18px 0;
  }
  .message-section p { font-size: 25px; }
  .site-footer { grid-template-columns: 1fr; }
  .footer-links { justify-content: flex-start; }
}