:root {
  --sub-forest: #12352b;
  --sub-forest-deep: #081c17;
  --sub-accent: #12352b;
  --sub-paper: #f5f3ec;
  --sub-ink: #17201d;
  --sub-muted: #66716c;
}

body.subpage { background: var(--sub-paper); color: var(--sub-ink); }
.subpage .site-footer { background: #061712; }
.contact-page-main { padding-top: 4.5rem; }
.contact-page-intro { padding: clamp(5rem, 10vw, 8rem) 0 clamp(3.5rem, 7vw, 5.5rem); }
.contact-page-intro h1 { max-width: 14em; margin: 0; font: 300 clamp(2rem, 5vw, 4.4rem)/1.35 "Noto Serif JP", serif; letter-spacing: -.025em; }
.contact-page-intro > .container > p:last-child { max-width: 42rem; margin: 1.5rem 0 0; color: var(--sub-muted); line-height: 2; }
.contact-page-section { padding-top: clamp(4rem, 8vw, 7rem); }
.subpage .site-header { background: rgba(245, 243, 236, .96); color: var(--sub-ink); }
.subpage .site-header .brand, .subpage .site-header .header-nav a { color: var(--sub-ink); }
.subpage .site-header .header-nav a[aria-current="page"] { border-bottom: 1px solid currentColor; }
.subpage .nav-toggle span { background: var(--sub-ink); }
.sub-hero { min-height: 70vh; display: grid; align-items: end; position: relative; overflow: hidden; background: var(--sub-forest-deep); color: #fff; }
.sub-hero-media { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .58; }
.sub-hero::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(5,24,20,.78), rgba(5,24,20,.12) 72%), linear-gradient(0deg, rgba(5,24,20,.7), transparent 55%); }
.sub-hero-content { position: relative; z-index: 1; padding-top: 10rem; padding-bottom: clamp(3rem, 7vw, 6rem); }
.sub-kicker {
  margin: 0 0 1rem;
  color: var(--sub-accent);
  font-family: var(--font-en-serif);
  font-size: .88rem;
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: .2em;
  text-transform: uppercase;
}
.sub-hero .sub-kicker { color: rgba(255,255,255,.78); }
.sub-hero h1 { max-width: 16em; margin: 0; font-family: "Noto Serif JP", serif; font-size: clamp(2.25rem, 4.2vw, 4.5rem); font-weight: 300; line-height: 1.18; letter-spacing: -.035em; text-wrap: balance; }
.sub-hero-lead { max-width: 42rem; margin: 1.5rem 0 0; font-size: clamp(1rem, 1.7vw, 1.2rem); line-height: 2; }
.crumbs { padding-block: 1rem; font-size: .78rem; color: var(--sub-muted); }
.crumbs a { text-decoration: underline; text-underline-offset: .25em; }
.sub-section { padding: clamp(4.5rem, 9vw, 8rem) 0; }
.sub-section[id] { scroll-margin-top: 6.5rem; }
.sub-section-alt { background: #fff; }
.sub-heading { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(1.5rem, 5vw, 5rem); align-items: start; margin-bottom: clamp(2.5rem, 5vw, 4.5rem); }
.sub-heading h2 { margin: 0; font-family: "Noto Serif JP", serif; font-size: clamp(1.8rem, 3.4vw, 3rem); font-weight: 300; line-height: 1.4; text-wrap: balance; word-break: keep-all; overflow-wrap: normal; }
.sub-heading p { max-width: 42rem; margin: .4rem 0 0; line-height: 2; color: var(--sub-muted); }
.guide-page .sub-heading { grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: clamp(2rem, 5vw, 4rem); }
.guide-page .sub-heading h2 { font-size: clamp(1.75rem, 3vw, 2.8rem); line-height: 1.45; text-wrap: balance; }
.guide-page .sub-heading p { max-width: 38rem; font-size: clamp(.95rem, 1.1vw, 1.05rem); line-height: 1.9; }
.intro-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: rgba(21,58,49,.18); border: 1px solid rgba(21,58,49,.18); }
.intro-card { padding: clamp(1.5rem, 3vw, 2.4rem); background: var(--sub-paper); }
.intro-card span { display: block; margin-bottom: 2.2rem; font: 600 .82rem/1 var(--font-en-serif); letter-spacing: .18em; color: var(--sub-muted); }
.intro-card h3 { margin: 0 0 .8rem; font-family: "Noto Serif JP", serif; font-size: 1.3rem; font-weight: 400; }
.intro-card p { margin: 0; color: var(--sub-muted); line-height: 1.9; }
.brand-card { display: flex; min-height: 20rem; flex-direction: column; }
.brand-card-logo { display: flex; height: 6rem; margin: 1.25rem 0 1.5rem; align-items: center; }
.brand-card-logo img { display: block; width: auto; max-width: 10rem; height: auto; max-height: 5rem; object-fit: contain; }
.brand-card-logo img.brand-card-logo-invert { filter: invert(1); }
.brand-card-logo img.brand-card-logo-wide { width: min(100%, 12rem); max-width: 12rem; max-height: 2.4rem; }
.product-detail { display: grid; grid-template-columns: 1.02fr .98fr; gap: clamp(2rem, 6vw, 6rem); align-items: start; margin-bottom: clamp(6rem, 12vw, 11rem); }
.product-detail:last-child { margin-bottom: 0; }
.product-detail:nth-child(even) .detail-media { order: 2; }
.detail-media { display: grid; place-items: center; min-height: 100%; padding: clamp(1rem, 3vw, 2.5rem); background: #fff; }
.detail-media img { display: block; width: 100%; max-height: 44rem; aspect-ratio: 4 / 5; object-fit: contain; }
.detail-media--product-photo { overflow: hidden; padding: 0; background: #0b0b0b; }
.detail-media--product-photo img { height: 100%; max-height: none; aspect-ratio: auto; object-fit: cover; }
.product-photo-slider { width: 100%; max-width: 32rem; min-width: 0; justify-self: center; }
.product-photo-stage { display: grid; place-items: center; height: clamp(22rem, 33vw, 30rem); overflow: hidden; background: #ece8e0; touch-action: pan-y pinch-zoom; }
.product-photo-stage img { display: block; width: 100%; height: 100%; min-height: 0; object-fit: contain; user-select: none; }
.product-photo-stage img[hidden], .product-photo-controls[hidden], .product-photo-count[hidden] { display: none; }
.product-photo-controls { display: flex; align-items: center; justify-content: space-between; gap: .75rem; margin-top: 1rem; }
.product-photo-arrow { display: grid; place-items: center; flex: 0 0 2.75rem; width: 2.75rem; height: 2.75rem; padding: 0; border: 1px solid rgba(21,58,49,.24); border-radius: 50%; color: var(--sub-forest); background: transparent; font: inherit; font-size: 1.2rem; cursor: pointer; }
.product-photo-arrow:hover { background: #fff; }
.product-photo-thumbnails { display: flex; gap: .6rem; min-width: 0; }
.product-photo-thumbnails button { width: clamp(3.5rem, 5vw, 4.5rem); height: 3.5rem; padding: 3px; border: 1px solid transparent; background: transparent; cursor: pointer; }
.product-photo-thumbnails button[aria-pressed="true"] { border-color: var(--sub-forest); }
.product-photo-thumbnails img { display: block; width: 100%; height: 100%; object-fit: contain; background: #ece8e0; }
.product-photo-slider button:focus-visible { outline: 2px solid var(--sub-forest); outline-offset: 3px; }
.product-photo-count { margin: .6rem 0 0; text-align: center; color: var(--sub-muted); font-size: .75rem; letter-spacing: .14em; }
@media (max-width: 600px) { .product-photo-stage { height: 22rem; } }
.detail-media--heater img { width: min(42%, 12rem); height: auto; aspect-ratio: auto; }
.heater-model-page .detail-media { background: transparent; }
.detail-copy { padding-top: 1.5rem; }
.detail-copy h2, .detail-copy h3 { font-family: "Noto Serif JP", serif; font-weight: 300; }
.detail-copy h2 { margin: .45rem 0 1.2rem; font-size: clamp(2rem, 4vw, 3.5rem); }
.detail-copy > p { line-height: 2; color: var(--sub-muted); }
.product-overview-section { padding-top: 5rem; }
.product-overview-section .product-detail { align-items: center; margin-bottom: 0; }
.product-overview-section .detail-copy { padding-top: 0; }
.product-detail-crumbs { margin: 0 0 clamp(2rem, 4vw, 3rem); color: var(--sub-muted); font-size: .78rem; }
.product-detail-crumbs a { text-decoration: underline; text-underline-offset: .25em; }
.product-overview-section .detail-copy h1 { margin: .4rem 0 .75rem; font: 300 clamp(2.1rem, 3.8vw, 3.4rem)/1.35 "Noto Serif JP", serif; letter-spacing: -.025em; text-wrap: balance; }
.product-detail-tagline { margin: 0 0 1rem; color: var(--sub-ink) !important; font: 400 clamp(1.08rem, 1.8vw, 1.35rem)/1.75 "Noto Serif JP", serif !important; }
.fact-list { margin: 2rem 0; border-top: 1px solid rgba(21,58,49,.2); }
.fact-list div { display: grid; grid-template-columns: 9rem 1fr; gap: 1rem; padding: 1rem 0; border-bottom: 1px solid rgba(21,58,49,.2); }
.fact-list dt { color: var(--sub-muted); }
.fact-list dd { margin: 0; font-weight: 500; }
.choice-list { display: grid; gap: .7rem; padding: 0; list-style: none; }
.choice-list li { position: relative; padding-left: 1.4rem; line-height: 1.8; }
.choice-list li::before { content: ""; position: absolute; left: 0; top: .75em; width: .45rem; height: .45rem; border-radius: 50%; background: var(--sub-forest); }
.inline-link { display: inline-flex; min-height: 2.9rem; align-items: center; justify-content: space-between; gap: 1.25rem; margin-top: 1rem; padding: .65rem .9rem; border: 1px solid rgba(21,58,49,.38); color: var(--sub-forest); background: rgba(255,255,255,.76); font-size: .88rem; font-weight: 700; letter-spacing: .03em; transition: color .2s ease, background .2s ease, border-color .2s ease; }
.inline-link::after { content: "→"; transition: transform .2s ease; }
.inline-link[target="_blank"]::after { content: "↗"; }
.inline-link:hover, .inline-link:focus-visible { color: #fff; background: var(--sub-forest); border-color: var(--sub-forest); }
.inline-link:hover::after, .inline-link:focus-visible::after { transform: translateX(.2rem); }
.case-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: clamp(2rem, 5vw, 5rem) 1.5rem; }
.case-entry { background: #fff; }
.case-entry img { display: block; width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.case-entry-copy { padding: 1.4rem 1.4rem 1.8rem; }
.case-entry .case-meta { margin: 0 0 .5rem; color: var(--sub-forest); font-size: .75rem; font-weight: 700; letter-spacing: .12em; }
.case-entry h2 { margin: 0 0 .7rem; font: 400 clamp(1.35rem, 2.4vw, 1.8rem)/1.5 "Noto Serif JP", serif; text-wrap: balance; }
.case-entry p:last-child { margin: 0; color: var(--sub-muted); line-height: 1.9; }
.article-list { display: grid; gap: 1px; background: rgba(21,58,49,.2); border: 1px solid rgba(21,58,49,.2); }
.article-card { display: grid; grid-template-columns: 12rem 1fr auto; align-items: center; gap: 2rem; padding: clamp(1.5rem, 3vw, 2.5rem); background: #fff; }
.article-card time { color: var(--sub-muted); font-size: .8rem; }
.article-card h2 { margin: 0 0 .45rem; font: 400 clamp(1.2rem, 2.5vw, 1.65rem)/1.55 "Noto Serif JP", serif; text-wrap: balance; }
.article-card p { margin: 0; color: var(--sub-muted); line-height: 1.8; }
.article-card > span { font-size: 1.5rem; }
.column-card-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(1.25rem, 2.5vw, 2rem); }
.column-card { display: flex; min-width: 0; flex-direction: column; background: #fff; border: 1px solid rgba(21,58,49,.16); transition: transform .3s ease, box-shadow .3s ease; }
.column-card:hover { transform: translateY(-4px); box-shadow: 0 1.2rem 2.6rem rgba(10,33,27,.11); }
.column-card-image { overflow: hidden; aspect-ratio: 16 / 10; background: #e9e6de; }
.column-card-image img { width: 100%; height: 100%; object-fit: cover; transition: transform .55s ease; }
.column-card:hover .column-card-image img { transform: scale(1.025); }
.column-card-body { display: flex; flex: 1; flex-direction: column; padding: clamp(1.25rem, 2.5vw, 2rem); }
.column-card-meta { display: flex; justify-content: space-between; gap: 1rem; align-items: center; margin-bottom: 1.1rem; color: var(--sub-muted); font-size: .75rem; letter-spacing: .06em; }
.column-card-meta > span { color: var(--sub-forest); font-weight: 700; }
.column-card h2 { margin: 0; font: 400 clamp(1.1rem, 1.7vw, 1.35rem)/1.55 "Noto Serif JP", serif; }
.column-card p { margin: .9rem 0 0; color: var(--sub-muted); font-size: .92rem; line-height: 1.85; }
.column-card-link { display: flex; justify-content: space-between; gap: 1rem; margin-top: 1.5rem; padding-top: 1rem; border-top: 1px solid rgba(21,58,49,.2); color: var(--sub-forest); font-size: .82rem; font-weight: 700; letter-spacing: .06em; }
.article-body { max-width: 50rem; margin-inline: auto; }
.article-body + .article-body { margin-top: 7rem; padding-top: 7rem; border-top: 1px solid rgba(21,58,49,.2); }
.article-body h2 { margin: 0 0 1.5rem; font: 400 clamp(1.65rem, 3.5vw, 2.6rem)/1.5 "Noto Serif JP", serif; text-wrap: balance; }
.article-body h3 { margin: 2.5rem 0 .8rem; font-size: 1.15rem; }
.article-body p, .article-body li { line-height: 2; color: #46514c; }
.article-body ol, .article-body ul { padding-left: 1.5rem; }
.article-crumbs { padding-top: 6.5rem; }
.article-page-body { max-width: 52rem; margin: 0 auto; padding: clamp(3.5rem, 8vw, 7rem) 1.25rem clamp(5rem, 10vw, 9rem); }
.article-page-header { padding-bottom: clamp(3rem, 6vw, 5rem); border-bottom: 1px solid rgba(21,58,49,.2); }
.article-page-header .sub-kicker { color: var(--sub-forest); }
.article-page-header h1 { max-width: 15em; margin: 0; font: 300 clamp(2.1rem, 4.6vw, 4rem)/1.35 "Noto Serif JP", serif; letter-spacing: -.025em; text-wrap: balance; }
.article-page-header time { display: block; margin-top: 1.5rem; color: var(--sub-muted); font-size: .8rem; }
.article-lead { margin: 2rem 0 0; font-size: clamp(1.05rem, 1.8vw, 1.22rem); line-height: 2.05; color: #394640; }
.article-page-body > section { padding-top: clamp(3.5rem, 7vw, 5.5rem); }
.article-page-body section h2 { margin: 0 0 1.5rem; font: 400 clamp(1.55rem, 3.2vw, 2.35rem)/1.55 "Noto Serif JP", serif; text-wrap: balance; }
.article-page-body section h3 { margin: 0 0 1rem; font: 400 1.25rem/1.6 "Noto Serif JP", serif; }
.article-page-body section p, .article-page-body section li { color: #46514c; line-height: 2; }
.article-page-body section ol, .article-page-body section ul { margin: 1.5rem 0 0; padding-left: 1.5rem; }
.article-page-body section li + li { margin-top: .65rem; }
.article-note { margin: 2rem 0; padding: 1.4rem 1.6rem; border-left: 3px solid var(--sub-forest); background: #fff; }
.article-note strong { display: block; margin-bottom: .45rem; }
.article-note p { margin: 0; }
.article-comparison { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; margin-top: 2rem; border: 1px solid rgba(21,58,49,.18); background: rgba(21,58,49,.18); }
.article-comparison > div { padding: clamp(1.4rem, 3vw, 2.2rem); background: #fff; }
.article-comparison .sub-kicker { color: var(--sub-forest); }
.article-comparison dl { margin: 1.5rem 0 0; }
.article-comparison dl div { padding: .85rem 0; border-top: 1px solid rgba(21,58,49,.15); }
.article-comparison dt { color: var(--sub-muted); font-size: .78rem; }
.article-comparison dd { margin: .3rem 0 0; line-height: 1.7; }
.article-step { display: block; margin-bottom: .65rem; color: var(--sub-forest); font: 600 .9rem var(--font-en-serif); letter-spacing: .18em; }
.article-bottom-nav { display: flex; justify-content: space-between; gap: 1.5rem; margin-top: clamp(4rem, 8vw, 7rem); padding-top: 1.5rem; border-top: 1px solid rgba(21,58,49,.2); }
.article-bottom-nav a { display: inline-flex; min-height: 2.9rem; align-items: center; padding: .65rem .9rem; border: 1px solid rgba(21,58,49,.28); color: var(--sub-forest); background: #fff; font-size: .88rem; font-weight: 700; transition: color .2s ease, background .2s ease, border-color .2s ease; }
.article-bottom-nav a:hover, .article-bottom-nav a:focus-visible { color: #fff; background: var(--sub-forest); border-color: var(--sub-forest); }
.company-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(2rem, 7vw, 7rem); }
.company-grid img { width: 100%; height: 100%; min-height: 28rem; object-fit: cover; }
.company-data { margin: 0; border-top: 1px solid rgba(21,58,49,.2); }
.company-data div { display: grid; grid-template-columns: 8rem 1fr; gap: 1rem; padding: 1.2rem 0; border-bottom: 1px solid rgba(21,58,49,.2); }
.company-data dt { color: var(--sub-muted); }
.company-data dd { margin: 0; line-height: 1.8; }
.guide-steps { counter-reset: guide; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; padding: 0; list-style: none; background: rgba(21,58,49,.18); border: 1px solid rgba(21,58,49,.18); }
.guide-steps li { counter-increment: guide; padding: 2rem 1.4rem; background: #fff; }
.guide-steps li::before { content: "0" counter(guide); display: block; margin-bottom: 2.2rem; color: var(--sub-forest); font: 700 .92rem var(--font-en); letter-spacing: .08em; }
.guide-steps h3 { margin: 0 0 .8rem; font: 400 1.25rem "Noto Serif JP", serif; }
.guide-steps p { margin: 0; color: var(--sub-muted); line-height: 1.85; }
.sub-cta {
  color: #fff;
  background:
    linear-gradient(90deg, rgba(4,20,16,.68) 0%, rgba(4,20,16,.48) 48%, rgba(4,20,16,.24) 100%),
    linear-gradient(0deg, rgba(4,20,16,.18), rgba(4,20,16,.02)),
    url("assets/cta-hinoki-forest-aerial.webp") center 44% / cover no-repeat;
}
.sub-cta-inner { display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 2rem; padding-top: clamp(3.5rem, 7vw, 6rem); padding-bottom: clamp(3.5rem, 7vw, 6rem); }
.sub-cta h2 { margin: 0 0 .8rem; font: 300 clamp(1.8rem, 4vw, 3rem)/1.5 "Noto Serif JP", serif; text-wrap: balance; }
.sub-cta p { margin: 0; color: rgba(255,255,255,.88); }
.sub-cta .btn { white-space: nowrap; }
.sub-footer-nav { display: flex; flex-wrap: wrap; gap: 1rem 2rem; margin-top: 1.75rem; }
.sub-footer-nav a { color: rgba(255,255,255,.75); font-size: .85rem; }
.spec-block + .spec-block { margin-top: 4rem; }
.spec-block-head { display: grid; grid-template-columns: .8fr 1.2fr; gap: 2rem; align-items: end; margin-bottom: 1.4rem; }
.spec-block-head h3 { margin: 0; font: 400 clamp(1.4rem, 3vw, 2.2rem)/1.4 "Noto Serif JP", serif; }
.spec-block-head > p { margin: 0; color: var(--sub-muted); line-height: 1.8; }
.spec-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; border: 1px solid rgba(21,58,49,.2); background: #fff; }
.spec-table { width: 100%; min-width: 760px; border-collapse: collapse; font-size: .9rem; }
.spec-table th, .spec-table td { padding: 1.05rem 1rem; text-align: left; border-bottom: 1px solid rgba(21,58,49,.13); white-space: nowrap; }
.spec-table th { background: var(--sub-forest); color: #fff; font-size: .78rem; letter-spacing: .05em; }
.spec-table tbody tr:last-child td { border-bottom: 0; }
.spec-table tbody tr:nth-child(even) { background: rgba(18,53,43,.045); }
.spec-table td:first-child { font-weight: 700; }
.option-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; background: rgba(21,58,49,.18); border: 1px solid rgba(21,58,49,.18); }
.option-card { padding: clamp(1.5rem, 2.7vw, 2.35rem); background: var(--sub-paper); }
.option-card-head { display: flex; min-height: 3.75rem; align-items: flex-start; justify-content: space-between; gap: 1rem; margin-bottom: clamp(1.25rem, 2vw, 1.75rem); }
.option-card-icon { flex: 0 0 auto; width: clamp(2.75rem, 4vw, 3.6rem); height: auto; color: var(--sub-forest); fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.option-card-icon-image { display: block; flex: 0 0 auto; width: clamp(4.25rem, 6vw, 5.25rem); height: clamp(4.25rem, 6vw, 5.25rem); object-fit: contain; }
.option-num { margin: .2rem 0 0; color: var(--sub-forest); font: 600 .86rem var(--font-en-serif); letter-spacing: .1em; }
.option-card > .option-num { margin: 0 0 2rem; }
.option-card h3 { margin: 0 0 .7rem; font: 400 1.15rem "Noto Serif JP", serif; }
.option-card p:last-child { margin: 0; color: var(--sub-muted); font-size: .9rem; line-height: 1.85; }
.product-gallery { display: grid; grid-template-columns: repeat(4, 1fr); gap: .8rem; margin-top: 2.5rem; }
.product-gallery img { display: block; width: 100%; aspect-ratio: 1 / 1; object-fit: cover; }
.product-gallery figcaption { padding-top: .65rem; color: var(--sub-muted); font-size: .78rem; }
.custom-photo-groups { margin-top: clamp(4rem, 8vw, 7rem); border-top: 1px solid rgba(21,58,49,.18); }
.custom-photo-group { display: grid; grid-template-columns: minmax(13rem, .55fr) 1.45fr; gap: clamp(2rem, 5vw, 4rem); padding: clamp(3rem, 6vw, 5rem) 0; border-bottom: 1px solid rgba(21,58,49,.18); }
.custom-photo-head h3 { margin: .25rem 0 .8rem; font: 400 clamp(1.35rem, 2.7vw, 2rem)/1.5 "Noto Serif JP", serif; text-wrap: balance; }
.custom-photo-head > p:last-child { margin: 0; color: var(--sub-muted); line-height: 1.9; }
.custom-photo-group .product-gallery { margin-top: 0; }
.product-gallery-wide { grid-template-columns: repeat(2, 1fr); }
.product-gallery-three { grid-template-columns: repeat(3, 1fr); }
.product-gallery figure { margin: 0; }
.custom-photo-group .product-gallery img { aspect-ratio: 4 / 3; object-fit: contain; background: #fff; }
.custom-photo-group-compact { align-items: center; }
.accessory-photo { margin: 0; padding: 1.5rem; background: #fff; }
.accessory-photo img { display: block; width: 100%; height: auto; }
.accessory-photo figcaption { margin-top: .7rem; color: var(--sub-muted); font-size: .78rem; }
.heater-layout { display: grid; grid-template-columns: minmax(15rem, .55fr) 1.45fr; gap: clamp(2rem, 6vw, 5rem); align-items: center; }
.heater-layout > img { width: 100%; max-height: 31rem; object-fit: contain; background: #fff; padding: 2rem; }
.heater-layout h3 { margin: .4rem 0 1.4rem; font: 400 clamp(1.5rem, 3vw, 2.4rem) "Noto Serif JP", serif; }
.detail-jump-wrap { padding-bottom: clamp(2rem, 4vw, 3rem); }
.product-jump { display: flex; flex-wrap: wrap; gap: .6rem; margin-top: 2rem; }
.product-jump a { padding: .7rem 1rem; border: 1px solid rgba(21,58,49,.25); border-radius: 0; background: #fff; font-size: .84rem; font-weight: 700; }
.product-jump a:hover { background: var(--sub-forest); border-color: var(--sub-forest); color: #fff; }
.product-list-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(1.2rem, 3vw, 2.2rem); }
.product-selection-section { background: var(--sub-forest-deep); color: #fff; }
.product-selection-section .sub-heading p { color: rgba(255,255,255,.72); }
.product-selection-section .product-list-card { color: var(--sub-ink); }
.product-selection-section .product-list-media { background: #fff; }
.product-list-card { overflow: hidden; border: 1px solid rgba(21,58,49,.18); background: #fff; }
.product-list-media { display: block; overflow: hidden; background: var(--sub-forest-deep); }
.product-list-media img { display: block; width: 100%; aspect-ratio: 4 / 3; object-fit: contain; transition: transform .5s ease, opacity .5s ease; }
.product-list-card:hover .product-list-media img { opacity: .9; transform: scale(1.025); }
.product-list-copy { padding: clamp(1.5rem, 3vw, 2.5rem); }
.product-list-type { margin: 0 0 1rem; color: var(--sub-forest); font: 600 .84rem/1 var(--font-en-serif); letter-spacing: .18em; }
.product-list-copy h2 { margin: 0 0 1rem; font: 400 clamp(1.7rem, 3.4vw, 2.6rem)/1.4 "Noto Serif JP", serif; }
.product-list-summary { min-height: 7.6em; margin: 0; color: var(--sub-muted); line-height: 1.9; }
.product-list-facts { margin: 1.8rem 0 0; border-top: 1px solid rgba(21,58,49,.16); }
.product-list-facts div { display: grid; grid-template-columns: 6.5rem 1fr; gap: 1rem; padding: .85rem 0; border-bottom: 1px solid rgba(21,58,49,.16); }
.product-list-facts dt { color: var(--sub-muted); font-size: .86rem; }
.product-list-facts dd { margin: 0; font-size: .92rem; font-weight: 700; }
.product-list-action { display: flex; justify-content: space-between; gap: 1rem; margin-top: 1.7rem; padding: 1rem 1.15rem; background: var(--sub-forest); color: #fff; font-size: .9rem; font-weight: 700; }
.product-list-action::after { content: "→"; }
.product-list-action:hover { background: var(--sub-forest-deep); }
.products-hero { min-height: 48vh; }
.products-hero .sub-hero-content { max-width: 1280px; padding-bottom: clamp(2.5rem, 5vw, 4rem); }
.product-catalog-head { display: flex; align-items: end; justify-content: space-between; gap: 2rem; margin-bottom: clamp(2rem, 4vw, 3rem); }
.product-catalog-head h2 { margin: 0; font: 300 clamp(2rem, 4vw, 3.4rem)/1.3 "Noto Serif JP", serif; text-wrap: balance; word-break: keep-all; }
.product-catalog-head p { margin: 0 0 .45rem; color: var(--sub-muted); }
.product-catalog-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(1rem, 2.4vw, 1.8rem); }
.product-catalog-group + .product-catalog-group { margin-top: clamp(4rem, 8vw, 7rem); padding-top: clamp(3rem, 6vw, 5rem); border-top: 1px solid rgba(21,58,49,.18); }
.product-catalog-group-head { display: grid; grid-template-columns: minmax(15rem, .8fr) minmax(18rem, 1.2fr); gap: .35rem clamp(2rem, 7vw, 7rem); align-items: end; margin-bottom: clamp(1.75rem, 4vw, 3rem); }
.product-catalog-group-head .sub-kicker { grid-column: 1 / -1; margin: 0; }
.product-catalog-group-head h2 { margin: 0; font: 300 clamp(1.8rem, 3.6vw, 3rem)/1.35 "Noto Serif JP", serif; text-wrap: balance; word-break: keep-all; }
.product-catalog-group-head > p:last-child { margin: 0 0 .3rem; color: var(--sub-muted); line-height: 1.8; }
.product-catalog-grid--rooms { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.product-catalog-grid--single { grid-template-columns: minmax(0, calc((100% - clamp(2rem, 4.8vw, 3.6rem)) / 3)); }
.product-catalog-card { display: flex; flex-direction: column; min-width: 0; border: 1px solid rgba(21,58,49,.18); background: #fff; }
.product-catalog-media { display: grid; place-items: center; overflow: hidden; height: clamp(15rem, 25vw, 21rem); padding: clamp(1rem, 2.5vw, 2rem); background: #f3f1ed; }
.product-catalog-media img { display: block; width: auto; height: auto; min-width: 0; min-height: 0; max-width: min(100%, 24rem); max-height: 100%; object-fit: contain; transition: transform .45s ease; }
.product-catalog-media--brand { background: var(--sub-forest); }
.product-catalog-media--brand img { width: min(72%, 16rem); filter: none; }
.product-catalog-media--harvia { background: #f3f1ed; }
.product-catalog-media--harvia img { width: min(62%, 13rem); }
.product-catalog-media--heater img { width: min(48%, 9.5rem); }
.product-catalog-media--loop-cutout img { width: min(64%, 13rem); }
.product-catalog-card:hover .product-catalog-media img { transform: scale(1.025); }
.product-catalog-copy { display: flex; flex: 1; flex-direction: column; align-items: flex-start; padding: clamp(1.15rem, 2.5vw, 1.75rem); }
.product-catalog-category { margin: 0 0 .65rem; color: var(--sub-forest); font: 600 .84rem/1 var(--font-en-serif); letter-spacing: .18em; }
.product-catalog-copy h2 { margin: 0; font: 400 clamp(1.25rem, 2.2vw, 1.75rem)/1.45 "Noto Serif JP", serif; }
.product-catalog-copy > p:not(.product-catalog-category) { margin: .55rem 0 .75rem; color: var(--sub-muted); font-size: .84rem; }
.product-catalog-copy strong { margin-top: auto; font-size: .9rem; }
.product-catalog-link { display: inline-flex; min-height: 2.75rem; align-items: center; justify-content: space-between; gap: 1rem; margin-top: 1.15rem; padding: .55rem .8rem; border: 1px solid rgba(21,58,49,.34); color: var(--sub-forest); background: #fff; font-size: .84rem; font-weight: 700; transition: color .2s ease, background .2s ease, border-color .2s ease; }
.product-catalog-link::after { content: "→"; transition: transform .2s ease; }
.product-catalog-link:hover, .product-catalog-link:focus-visible { color: #fff; background: var(--sub-forest); border-color: var(--sub-forest); }
.product-catalog-link:hover::after, .product-catalog-link:focus-visible::after { transform: translateX(.2rem); }
.product-catalog-actions { margin-top: 2rem; }
.product-compare a { color: var(--sub-forest); font-weight: 700; }
.product-price-note { margin: 1rem 0 0; color: var(--sub-muted); font-size: .82rem; line-height: 1.8; }
.related-products-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.2rem; }
.related-products-grid .related-product { display: grid; grid-template-columns: minmax(9rem, .75fr) 1.25fr; min-height: 19rem; background: #fff; border: 1px solid rgba(21,58,49,.18); }
.related-products-grid .related-product > img { width: 100%; height: 100%; min-height: 19rem; padding: clamp(.8rem, 2vw, 1.5rem); object-fit: contain; background: #fff; }
.related-products-grid .related-product > div { padding: clamp(1.4rem, 3vw, 2.2rem); align-self: center; }
.related-products-grid .sub-kicker { color: var(--sub-forest); }
.related-products-grid .related-product h3 { margin: .3rem 0 .8rem; font: 400 clamp(1.3rem, 2.4vw, 1.8rem)/1.4 "Noto Serif JP", serif; }
.related-products-grid .related-product p:not(.sub-kicker) { margin: 0; color: var(--sub-muted); line-height: 1.85; }
.related-product-section { padding: clamp(4rem, 8vw, 7rem) 0; background: #fff; }
.related-product-inner { display: grid; grid-template-columns: minmax(18rem, .8fr) 1.2fr; gap: clamp(2rem, 7vw, 7rem); align-items: center; }
.related-product-visual { display: grid; place-items: center; min-height: 25rem; padding: clamp(1rem, 3vw, 2.5rem); background: var(--sub-paper); }
.related-product-visual img { display: block; width: 100%; max-height: 28rem; object-fit: contain; }
.related-product-inner h2 { margin: .4rem 0 1rem; font: 300 clamp(1.7rem, 3.5vw, 2.8rem)/1.5 "Noto Serif JP", serif; }
.related-product-inner p:not(.sub-kicker) { color: var(--sub-muted); line-height: 1.9; }

.heater-brand-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(1.5rem, 4vw, 3rem); }
.heater-brand-card { display: grid; grid-template-columns: minmax(9.5rem, .72fr) minmax(0, 1.28fr); min-height: 22rem; background: #fff; border: 1px solid rgba(21,58,49,.18); }
.heater-brand-media { display: grid; place-items: center; min-height: 17.5rem; padding: 1.75rem; background: #f3f1ed; }
.heater-brand-media img { width: 100%; height: 100%; max-height: 18.75rem; object-fit: contain; }
.heater-brand-copy { padding: clamp(1.5rem, 3vw, 2.25rem); }
.heater-brand-copy h3 { margin: .5rem 0 1.25rem; font: 600 clamp(1.5rem, 2.4vw, 2.1rem)/1.25 var(--font-en); }
.heater-model-list { display: grid; gap: 0; margin: 0; padding: 0; list-style: none; border-top: 1px solid rgba(21,58,49,.18); }
.heater-model-list li { display: grid; gap: .25rem; padding: .85rem 0; border-bottom: 1px solid rgba(21,58,49,.18); }
.heater-model-list span { color: var(--sub-muted); font-size: .8rem; }
.heater-design-list { display: grid; gap: clamp(2rem, 5vw, 4rem); }
.heater-design-card { display: grid; grid-template-columns: minmax(16rem, .8fr) minmax(0, 1.2fr); min-height: 30rem; border: 1px solid rgba(21,58,49,.18); background: #fff; }
.heater-design-media { display: grid; place-items: center; padding: clamp(1.5rem, 4vw, 3rem); background: #f3f1ed; }
.heater-design-media img { width: 100%; height: 100%; max-height: 28rem; object-fit: contain; }
.heater-design-copy { align-self: center; padding: clamp(1.5rem, 5vw, 4rem); }
.heater-design-copy h2 { margin: .35rem 0 1rem; font-size: clamp(1.8rem, 3.4vw, 3rem); font-weight: 400; }
.heater-design-copy > p:not(.sub-kicker) { color: var(--sub-muted); line-height: 1.9; }
.heater-design-spec { margin: 1.75rem 0 0; border-top: 1px solid rgba(21,58,49,.18); }
.heater-design-spec div { display: grid; grid-template-columns: 7rem 1fr; gap: 1rem; padding: .85rem 0; border-bottom: 1px solid rgba(21,58,49,.18); }
.heater-design-spec dt { color: var(--sub-muted); font-size: .8rem; }
.heater-design-spec dd { margin: 0; font-weight: 500; }
.heater-model-overview { padding-top: clamp(8rem, 12vw, 10rem); }
.site-header.scrolled .brand-logo-viewport-header .brand-logo-image-base:only-child { filter: brightness(0) saturate(100%); }
.heater-model-brand-visual { display: grid; min-height: 34rem; place-items: center; align-content: center; gap: 1.4rem; padding: clamp(2rem, 5vw, 4rem); background: var(--sub-forest); color: #fff; text-align: center; }
.heater-model-brand-visual img { width: min(82%, 22rem); max-height: 8rem; object-fit: contain; }
.heater-model-brand-visual strong { font: 600 clamp(2.4rem, 6vw, 5rem)/1 var(--font-en-serif); letter-spacing: .1em; }
.heater-model-brand-visual span { font-size: .72rem; letter-spacing: .12em; opacity: .68; }
.heater-model-brand-visual--light { background: #f3f1ed; color: var(--sub-forest); }
.heater-model-notes { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; margin-top: 1.5rem; }
.heater-model-notes p { max-width: 48rem; margin: 0; color: var(--sub-muted); font-size: .82rem; line-height: 1.8; }
.heater-installation-grid { display: grid; grid-template-columns: minmax(18rem, .8fr) minmax(0, 1.2fr); gap: clamp(2rem, 7vw, 7rem); align-items: center; }
.heater-installation-photo { margin: 0; }
.heater-installation-photo img { display: block; width: 100%; aspect-ratio: 3 / 4; object-fit: cover; }
.heater-installation-photo figcaption, .room-showcase-gallery figcaption { padding-top: .7rem; color: var(--sub-muted); font-size: .78rem; }
.heater-installation-copy h2 { margin: .4rem 0 1rem; font: 300 clamp(1.8rem, 3.5vw, 3rem)/1.4 "Noto Serif JP", serif; }
.heater-installation-copy > p:last-child { max-width: 38rem; color: var(--sub-muted); line-height: 2; }
.room-showcase-gallery { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(1rem, 3vw, 2rem); }
.room-showcase-gallery figure { margin: 0; }
.room-showcase-gallery img { display: block; width: 100%; aspect-ratio: 3 / 2; object-fit: cover; }

.estimate-simulator { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(17.5rem, .7fr); gap: clamp(1.5rem, 4vw, 3.5rem); padding: clamp(1.5rem, 4vw, 3.5rem); background: #fff; border: 1px solid rgba(21,58,49,.18); }
#estimate-simulator .sub-heading h2 { font-size: clamp(1.8rem, 3vw, 2.6rem); }
#estimate-simulator .sub-heading h2 span { display: block; }
.estimate-page-main { padding-top: 4.5rem; }
.estimate-page-intro { padding: clamp(5rem, 10vw, 8rem) 0 clamp(2.5rem, 5vw, 4rem); }
.estimate-page-intro h1 { margin: .5rem 0 1rem; font: 300 clamp(2.2rem, 5vw, 4.2rem)/1.3 "Noto Serif JP", serif; }
.estimate-page-intro > .container > p:last-child { max-width: 44rem; margin: 0; color: var(--sub-muted); line-height: 2; }
.estimate-page-section { padding-top: 0; }
.estimate-fields { display: grid; gap: clamp(2.5rem, 5vw, 4.5rem); min-width: 0; }
.estimate-fields label:not(.estimate-check) { display: grid; gap: .5rem; font-size: .8rem; font-weight: 700; }
.estimate-fields select { width: 100%; min-height: 3.2rem; padding: 0 2.6rem 0 .9rem; border: 1px solid rgba(21,58,49,.24); border-radius: 0; background: #fff; color: var(--sub-ink); font: inherit; }
.estimate-check { display: flex; align-items: center; gap: .65rem; font-size: .88rem; }
.estimate-check input { width: 1.1rem; height: 1.1rem; }
.estimate-fieldset { min-width: 0; margin: 0; padding: 0; border: 0; }
.estimate-fieldset legend { display: flex; align-items: center; gap: .75rem; width: 100%; margin: 0 0 1.25rem; color: var(--sub-ink); font: 500 clamp(1.2rem, 2.5vw, 1.65rem)/1.4 var(--font-mincho); }
.estimate-fieldset legend span { color: var(--sub-forest); font: 600 .8rem/1 var(--font-en-serif); letter-spacing: .12em; }
.estimate-fieldset-lead { margin: -.5rem 0 1.5rem; color: var(--sub-muted); font-size: .82rem; line-height: 1.8; }
.estimate-custom-panel[hidden] { display: none !important; }
.estimate-custom-panel { display: grid; gap: 2rem; }
.estimate-custom-group h3 { margin: 0 0 .8rem; color: var(--sub-ink); font-size: .92rem; font-weight: 500; letter-spacing: .08em; }
.estimate-option-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .85rem; }
.estimate-option-card { position: relative; display: block !important; cursor: pointer; }
.estimate-option-card > input,
.estimate-delivery-grid input,
.estimate-addon-card > input { position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none; }
.estimate-option-inner { position: relative; display: grid; grid-template-columns: 7rem minmax(0, 1fr); min-height: 7rem; overflow: hidden; border: 1px solid rgba(21,58,49,.18); background: var(--sub-paper); transition: border-color .2s ease, box-shadow .2s ease, background-color .2s ease; }
.estimate-option-inner::after,
.estimate-delivery-grid label > span::after,
.estimate-addon-card > span::after { content: "✓"; position: absolute; top: .7rem; right: .7rem; display: grid; place-items: center; width: 1.5rem; height: 1.5rem; border: 1px solid rgba(21,58,49,.28); border-radius: 50%; background: rgba(255,255,255,.88); color: transparent; font-size: .8rem; }
.estimate-option-media { display: grid; place-items: center; min-height: 7rem; padding: .55rem; background: #fff; }
.estimate-option-media img { width: 100%; height: 100%; max-height: 7.5rem; object-fit: contain; }
.estimate-option-copy { display: flex; min-width: 0; flex-direction: column; justify-content: center; gap: .35rem; padding: 1rem 2.5rem 1rem 1rem; }
.estimate-option-copy strong { font-size: .88rem; line-height: 1.55; }
.estimate-option-copy small { color: var(--sub-muted); font-size: .78rem; font-weight: 500; }
.estimate-option-card input:checked + .estimate-option-inner,
.estimate-option-card input:focus-visible + .estimate-option-inner { border-color: var(--sub-forest); box-shadow: inset 0 0 0 1px var(--sub-forest); background: rgba(18,53,43,.055); }
.estimate-option-card input:checked + .estimate-option-inner::after,
.estimate-delivery-grid input:checked + span::after,
.estimate-addon-card input:checked + span::after { border-color: var(--sub-forest); background: var(--sub-forest); color: #fff; }
.estimate-delivery-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .7rem; }
.estimate-delivery-grid label { position: relative; display: block !important; cursor: pointer; }
.estimate-delivery-grid label > span { position: relative; display: flex; min-height: 6.5rem; flex-direction: column; justify-content: center; gap: .35rem; padding: 1rem 2.3rem 1rem 1rem; border: 1px solid rgba(21,58,49,.18); background: var(--sub-paper); transition: border-color .2s ease, box-shadow .2s ease, background-color .2s ease; }
.estimate-delivery-grid strong { font-size: .84rem; line-height: 1.5; }
.estimate-delivery-grid small { color: var(--sub-muted); font-size: .75rem; font-weight: 500; }
.estimate-delivery-grid input:checked + span,
.estimate-delivery-grid input:focus-visible + span { border-color: var(--sub-forest); box-shadow: inset 0 0 0 1px var(--sub-forest); background: rgba(18,53,43,.055); }
.estimate-addon-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .85rem; }
.estimate-addon-card { position: relative; display: block !important; cursor: pointer; }
.estimate-addon-card > span { position: relative; display: grid; grid-template-columns: 7rem minmax(0, 1fr); min-height: 7rem; overflow: hidden; border: 1px solid rgba(21,58,49,.18); background: var(--sub-paper); transition: border-color .2s ease, box-shadow .2s ease, background-color .2s ease; }
.estimate-addon-card img { width: 100%; height: 100%; min-height: 7rem; object-fit: cover; }
.estimate-addon-card > span > span { display: flex; flex-direction: column; justify-content: center; gap: .35rem; padding: 1rem 2.5rem 1rem 1rem; }
.estimate-addon-card strong { font-size: .88rem; line-height: 1.5; }
.estimate-addon-card small { color: var(--sub-muted); font-size: .75rem; }
.estimate-addon-card input:checked + span,
.estimate-addon-card input:focus-visible + span { border-color: var(--sub-forest); box-shadow: inset 0 0 0 1px var(--sub-forest); background: rgba(18,53,43,.055); }
.estimate-result { position: sticky; top: 7rem; display: flex; flex-direction: column; align-items: stretch; align-self: start; min-width: 0; padding: clamp(1.25rem, 2.5vw, 1.75rem); border: 1px solid rgba(21,58,49,.2); background: #f7f5ef; color: var(--sub-ink); box-shadow: 0 12px 32px rgba(21,58,49,.06); container-type: inline-size; }
.estimate-result-heading { display: flex; align-items: center; justify-content: space-between; gap: .75rem; margin-bottom: 1rem; }
.estimate-result-heading p { margin: 0; color: var(--sub-forest); font-size: .88rem; font-weight: 700; letter-spacing: .06em; }
.estimate-result-tax { padding: .25rem .55rem; border: 1px solid rgba(21,58,49,.18); color: var(--sub-forest); font-size: .65rem; line-height: 1.4; white-space: nowrap; }
.estimate-result > strong { display: block; margin: 0 0 .55rem; font: 600 clamp(1.65rem, 9cqi, 2.1rem)/1.25 var(--font-en); letter-spacing: -.025em; font-variant-numeric: tabular-nums; white-space: nowrap; }
.estimate-result > [data-estimate-note] { display: block; margin-bottom: 1.5rem; color: var(--sub-muted); font-size: .75rem; line-height: 1.7; }
.estimate-stove-warning { margin: 0 0 1.25rem; padding: .85rem; border-left: 3px solid #966b29; background: #f0e7d5; color: #60481f; font-size: .78rem; line-height: 1.8; overflow-wrap: anywhere; }
.estimate-stove-warning[hidden] { display: none; }
.estimate-custom-summary { margin: 0 0 1.5rem; padding-top: 1.25rem; border-top: 1px solid rgba(21,58,49,.16); }
.estimate-custom-summary p { margin: 0 0 .8rem; color: var(--sub-muted); font-size: .72rem; letter-spacing: .05em; }
.estimate-custom-summary ul { display: grid; gap: .6rem; margin: 0; padding: 0; list-style: none; }
.estimate-custom-summary li { position: relative; padding-left: .9rem; color: var(--sub-ink); font-size: .82rem; line-height: 1.7; overflow-wrap: anywhere; }
.estimate-custom-summary li::before { content: ""; position: absolute; top: .65em; left: 0; width: .25rem; height: .25rem; border-radius: 50%; background: var(--sub-forest); }
.estimate-result .estimate-result-contact { display: flex; justify-content: space-between; width: 100%; min-height: 3.4rem; padding: 1rem; border-color: var(--sub-forest); background: var(--sub-forest); color: #fff; font-size: .82rem; letter-spacing: .02em; line-height: 1.5; box-shadow: none; }
.estimate-result .estimate-result-contact:hover { background: #214b3d; border-color: #214b3d; }
.estimate-result-contact span { white-space: nowrap; }
.estimate-result-contact svg { flex: 0 0 1.1rem; width: 1.1rem; height: 1.1rem; }
@media (max-width: 1100px) {
  .estimate-simulator { grid-template-columns: 1fr; }
  .estimate-result { position: static; min-height: 0; }
  .sub-heading,
  .guide-page .sub-heading,
  .product-catalog-group-head { grid-template-columns: 1fr; gap: 1.25rem; align-items: start; }
}
@media (max-width: 639px) {
  .estimate-option-grid,
  .estimate-addon-grid { grid-template-columns: 1fr; }
  .estimate-delivery-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .estimate-option-inner,
  .estimate-addon-card > span { grid-template-columns: 6.25rem minmax(0, 1fr); }
  .heater-model-brand-visual { min-height: 21rem; }
  .heater-model-notes { align-items: flex-start; flex-direction: column; }
}
.dimension-section { margin-top: clamp(3.5rem, 7vw, 6rem); padding-top: clamp(3rem, 6vw, 5rem); border-top: 1px solid rgba(21,58,49,.18); }
.dimension-heading { display: grid; grid-template-columns: .75fr 1.25fr; gap: .4rem 2rem; margin-bottom: 2rem; }
.dimension-heading .sub-kicker { grid-column: 1 / -1; }
.dimension-heading h3 { margin: 0; font: 400 clamp(1.5rem, 3vw, 2.35rem)/1.45 "Noto Serif JP", serif; text-wrap: balance; word-break: keep-all; }
.dimension-heading > p:last-child { max-width: 40rem; margin: .2rem 0 0; color: var(--sub-muted); line-height: 1.9; }
.room-dimension-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.dimension-card { padding: clamp(1.2rem, 2.5vw, 2rem); border: 1px solid rgba(21,58,49,.18); background: #fff; }
.dimension-card-head { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; margin-bottom: .6rem; }
.dimension-card-head span { color: var(--sub-muted); font-size: .78rem; }
.dimension-card-head h4 { margin: 0; font-size: .9rem; letter-spacing: .04em; }
.dimension-svg, .barrel-dimension-svg { display: block; width: 100%; height: auto; color: var(--sub-forest); }
.dimension-svg text, .barrel-dimension-svg text { fill: var(--sub-ink); font: 500 12px "Noto Sans JP", sans-serif; text-anchor: middle; }
.dimension-svg marker path, .barrel-dimension-svg marker path { fill: var(--sub-forest); }
.dimension-shape { fill: rgba(18,53,43,.08); stroke: var(--sub-forest); stroke-width: 2; }
.dimension-inner { fill: none; stroke: rgba(21,58,49,.62); stroke-width: 1.5; stroke-dasharray: 5 4; }
.dimension-line { fill: none; stroke: var(--sub-forest); stroke-width: 1; }
.dimension-vertical { writing-mode: vertical-rl; }
.dimension-data { margin: 1rem 0 0; border-top: 1px solid rgba(21,58,49,.16); }
.dimension-data div { display: grid; grid-template-columns: 4rem 1fr; gap: .7rem; padding: .65rem 0; border-bottom: 1px solid rgba(21,58,49,.16); }
.dimension-data dt { color: var(--sub-muted); font-size: .78rem; }
.dimension-data dd { margin: 0; font-size: .82rem; font-weight: 700; }
.dimension-note { margin: 1rem 0 0; color: var(--sub-muted); font-size: .78rem; line-height: 1.8; }
.source-drawing { margin: 0; padding: clamp(1rem, 3vw, 2.5rem); border: 1px solid rgba(21,58,49,.18); background: #fff; }
.source-drawing a { display: block; width: fit-content; max-width: 100%; margin-inline: auto; cursor: zoom-in; }
.source-drawing img { display: block; width: 100%; height: auto; object-fit: contain; }
.source-drawing-room img { max-width: 54rem; }
.source-drawing-barrel img { max-width: 58rem; }
.source-drawing figcaption { margin-top: 1rem; color: var(--sub-muted); font-size: .78rem; line-height: 1.8; text-align: center; }
.barrel-dimension-layout { display: grid; grid-template-columns: 1.45fr .55fr; gap: clamp(1.5rem, 4vw, 3.5rem); align-items: center; padding: clamp(1.2rem, 3vw, 2.5rem); border: 1px solid rgba(21,58,49,.18); background: #fff; }
.barrel-dimension-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.barrel-dimension-data { margin-top: 0; }
.finish-spec-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; margin-top: clamp(3rem, 6vw, 5rem); }
.finish-spec-grid-three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.finish-spec-card { padding: clamp(1.4rem, 3vw, 2.2rem); background: var(--sub-paper); }
.finish-spec-card h3 { margin: .25rem 0 .8rem; font: 400 clamp(1.25rem, 2.3vw, 1.65rem)/1.5 "Noto Serif JP", serif; }
.finish-spec-card > p:not(.sub-kicker) { margin: 0 0 1.2rem; color: var(--sub-muted); line-height: 1.8; }
.finish-tags { display: flex; flex-wrap: wrap; gap: .55rem; margin: 1.2rem 0 0; padding: 0; list-style: none; }
.finish-tags li { padding: .55rem .75rem; border: 1px solid rgba(21,58,49,.2); background: #fff; font-size: .8rem; }
.finish-tags-colors li { display: inline-flex; align-items: center; gap: .55rem; }
.finish-tags-colors li::before { content: ""; flex: 0 0 auto; width: 1rem; height: 1rem; border: 1px solid rgba(8,28,23,.22); border-radius: 50%; background: var(--finish-swatch); box-shadow: inset 0 0 0 1px rgba(255,255,255,.16); }
.finish-tags-paint li:nth-child(1) { --finish-swatch: #355844; }
.finish-tags-paint li:nth-child(2) { --finish-swatch: #a8aaa3; }
.finish-tags-paint li:nth-child(3) { --finish-swatch: #202322; }
.finish-tags-paint li:nth-child(4) { --finish-swatch: #70503a; }
.finish-tags-paint li:nth-child(5) { --finish-swatch: #c5a778; }
.finish-tags-paint li:nth-child(6) { --finish-swatch: #d8cdb4; }
.finish-tags-shingle li:nth-child(1) { --finish-swatch: #202322; }
.finish-tags-shingle li:nth-child(2) { --finish-swatch: #7c807d; }
.finish-tags-shingle li:nth-child(3) { --finish-swatch: #65483a; }
.finish-tags-shingle li:nth-child(4) { --finish-swatch: #405847; }
.finish-tags-shingle li:nth-child(5) { --finish-swatch: #b88958; }
.heater-models { margin-top: clamp(3rem, 6vw, 5rem); padding-top: clamp(2.5rem, 5vw, 4rem); border-top: 1px solid rgba(21,58,49,.18); }
.heater-models-head { display: grid; grid-template-columns: .75fr 1.25fr; gap: 2rem; align-items: end; margin-bottom: 1.5rem; }
.heater-models-head h3 { margin: 0; font: 400 clamp(1.4rem, 2.8vw, 2rem)/1.45 "Noto Serif JP", serif; text-wrap: balance; word-break: keep-all; }
.heater-models-head p { margin: 0; color: var(--sub-muted); line-height: 1.8; }
.heater-model-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 1px; border: 1px solid rgba(21,58,49,.18); background: rgba(21,58,49,.18); }
.heater-model-grid article { padding: 1.15rem; background: #fff; }
.heater-model-grid span { display: block; color: var(--sub-forest); font-size: .72rem; font-weight: 700; }
.heater-model-grid h4 { margin: .65rem 0 .3rem; font-size: .95rem; }
.heater-model-grid p { margin: 0; color: var(--sub-muted); font-size: .84rem; }

/* 設置用途別ページ */
.use-page .sub-hero-content { max-width: 64rem; }
.use-page .sub-hero h1 { max-width: 13em; }
.use-page .sub-hero-lead { max-width: 42rem; }
.use-intro { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(20rem, .95fr); gap: clamp(2rem, 5vw, 5rem); align-items: start; }
.use-intro h2,
.use-section-head h2 { margin: .35rem 0 0; font: 300 clamp(2rem, 3.25vw, 3rem)/1.45 "Noto Serif JP", serif; letter-spacing: .01em; text-wrap: balance; word-break: keep-all; }
.use-intro h2 { margin: .35rem 0 0; font: 300 clamp(2rem, 3.1vw, 2.9rem)/1.45 "Noto Serif JP", serif; letter-spacing: .01em; }
.use-intro-copy > p { margin: 0; color: var(--sub-muted); font-size: clamp(.95rem, 1.35vw, 1.06rem); line-height: 2; }
.use-facts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; margin-top: 2rem; background: rgba(21,58,49,.16); }
.use-facts div { padding: 1.15rem; background: #fff; }
.use-facts dt { color: var(--sub-muted); font-size: .72rem; letter-spacing: .08em; }
.use-facts dd { margin: .45rem 0 0; font-weight: 700; line-height: 1.6; }
.use-section-head { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(20rem, .8fr); gap: clamp(2rem, 5vw, 5rem); align-items: end; margin-bottom: clamp(2rem, 4vw, 3.5rem); }
.use-section-head > p { max-width: 43rem; margin: 0 0 .5rem; color: var(--sub-muted); line-height: 1.9; }
.use-choice-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(1rem, 2.5vw, 2rem); }
.use-choice-card { display: grid; grid-template-rows: minmax(17rem, 1fr) auto; background: #fff; color: inherit; text-decoration: none; transition: box-shadow .2s ease, transform .2s ease; }
.use-choice-card:hover, .use-choice-card:focus-visible { box-shadow: inset 0 0 0 2px var(--sub-forest); transform: translateY(-2px); }
.use-choice-card img { width: 100%; height: 100%; min-height: 17rem; padding: clamp(1rem, 3vw, 2.3rem); background: #fff; object-fit: contain; }
.use-choice-copy { display: flex; flex-direction: column; align-items: flex-start; padding: clamp(1.4rem, 3vw, 2.2rem); background: var(--sub-paper); }
.use-choice-copy .sub-kicker { color: var(--sub-forest); }
.use-choice-copy h3 { margin: .4rem 0 .8rem; font: 400 clamp(1.35rem, 2.5vw, 2rem)/1.45 "Noto Serif JP", serif; text-wrap: balance; }
.use-choice-copy p:not(.sub-kicker) { margin: 0; color: var(--sub-muted); line-height: 1.85; }
.use-choice-copy::after { content: "製品詳細を見る →"; display: inline-block; margin-top: 1.25rem; padding-bottom: .18rem; border-bottom: 1px solid currentColor; color: var(--sub-forest); font-size: .8rem; font-weight: 700; }
.use-points { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px; background: rgba(21,58,49,.16); }
.use-point { display: grid; grid-template-columns: 3rem 1fr; gap: 1.1rem; padding: clamp(1.4rem, 3vw, 2.2rem); background: #fff; }
.use-point-index { color: var(--sub-forest); font: 600 1.05rem/1 "Cormorant Garamond", serif; letter-spacing: .08em; }
.use-point h3 { margin: 0 0 .6rem; font: 400 clamp(1.1rem, 2vw, 1.4rem)/1.5 "Noto Serif JP", serif; text-wrap: balance; }
.use-point p { margin: 0; color: var(--sub-muted); line-height: 1.85; }
.use-proof { display: grid; grid-template-columns: 1.05fr .95fr; background: var(--sub-forest); color: #fff; }
.use-proof img { width: 100%; height: 100%; min-height: 28rem; object-fit: cover; }
.use-proof-copy { align-self: center; padding: clamp(2rem, 6vw, 5.5rem); }
.use-proof-copy .sub-kicker { color: #fff; opacity: .72; }
.use-proof-copy h2 { margin: .5rem 0 1rem; font: 300 clamp(1.8rem, 3.6vw, 3rem)/1.5 "Noto Serif JP", serif; text-wrap: balance; }
.use-proof-copy p:not(.sub-kicker) { margin: 0 0 1.5rem; color: rgba(255,255,255,.8); line-height: 1.95; }
.use-proof-copy a { color: #fff; font-weight: 700; text-underline-offset: .35em; }
.use-cost-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; background: rgba(21,58,49,.16); }
.use-cost-grid article { padding: clamp(1.4rem, 3vw, 2.3rem); background: #fff; }
.use-cost-grid span { color: var(--sub-forest); font: 600 .78rem/1 "Noto Sans JP", sans-serif; letter-spacing: .12em; }
.use-cost-grid h3 { margin: .7rem 0; font: 400 clamp(1.15rem, 2vw, 1.45rem)/1.5 "Noto Serif JP", serif; }
.use-cost-grid p { margin: 0; color: var(--sub-muted); line-height: 1.85; }
.use-note { margin: 1.2rem 0 0; color: var(--sub-muted); font-size: .82rem; line-height: 1.8; }
.use-faq { max-width: 60rem; margin-inline: auto; }
.use-faq details { border-top: 1px solid rgba(21,58,49,.2); }
.use-faq details:last-child { border-bottom: 1px solid rgba(21,58,49,.2); }
.use-faq summary { display: grid; grid-template-columns: 2rem 1fr auto; gap: .8rem; padding: 1.4rem 0; cursor: pointer; font-weight: 700; list-style: none; }
.use-faq summary::-webkit-details-marker { display: none; }
.use-faq summary::before { content: "Q"; color: var(--sub-forest); font-family: "Cormorant Garamond", serif; font-size: 1.2rem; }
.use-faq summary::after { content: "+"; color: var(--sub-forest); font-size: 1.2rem; }
.use-faq details[open] summary::after { content: "−"; }
.use-faq details p { margin: 0; padding: 0 0 1.5rem 2.8rem; color: var(--sub-muted); line-height: 1.9; }
.use-link-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; background: rgba(21,58,49,.16); }
.use-link-card { display: block; min-height: 15rem; padding: clamp(1.4rem, 3vw, 2.3rem); background: #fff; color: inherit; text-decoration: none; transition: background .2s ease, box-shadow .2s ease; }
.use-link-card:hover, .use-link-card:focus-visible { background: #f8f7f2; box-shadow: inset 0 0 0 2px var(--sub-forest); }
.use-link-card .sub-kicker { color: var(--sub-forest); }
.use-link-card h3 { margin: 1.5rem 0 .8rem; font: 400 clamp(1.25rem, 2.2vw, 1.7rem)/1.5 "Noto Serif JP", serif; }
.use-link-card p:not(.sub-kicker) { margin: 0; color: var(--sub-muted); line-height: 1.8; }
.use-link-card span:last-child { display: inline-block; margin-top: 1.2rem; padding-bottom: .18rem; border-bottom: 1px solid currentColor; color: var(--sub-forest); font-size: .78rem; font-weight: 700; }

/* サービスサイトは直線的な造形を基本とし、操作上必要な丸印のみ例外とする。 */
.subpage .contact-form,
.subpage .contact-form input,
.subpage .contact-form select,
.subpage .contact-form textarea,
.subpage .set-badge,
.subpage .stove-detail summary,
.subpage .case-tag { border-radius: 0; }

/* 複合クラス側のpadding指定があっても、下層ページの左右余白は常に保つ。 */
.subpage .container { padding-inline: clamp(1.25rem, 5vw, 3rem); }

@media (max-width: 1100px) {
  .dimension-heading,
  .heater-models-head,
  .use-intro,
  .use-section-head,
  .use-proof { grid-template-columns: 1fr; gap: 1.25rem; align-items: start; }
}

@media (max-width: 860px) {
  .sub-heading, .product-detail, .company-grid, .sub-cta-inner, .related-products-grid, .related-product-inner, .heater-brand-grid, .heater-design-card, .heater-installation-grid, .estimate-simulator { grid-template-columns: 1fr; }
  .product-catalog-group-head { grid-template-columns: 1fr; align-items: start; }
  .heater-brand-card { grid-template-columns: 1fr; }
  .guide-page .sub-heading { grid-template-columns: 1fr; gap: 1.25rem; }
  .product-detail:nth-child(even) .detail-media { order: 0; }
  .intro-grid { grid-template-columns: 1fr; }
  .guide-steps { grid-template-columns: repeat(2, 1fr); }
  .article-card { grid-template-columns: 1fr auto; gap: .8rem 1rem; }
  .article-card time { grid-column: 1 / -1; }
  .column-card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .spec-block-head, .heater-layout, .custom-photo-group { grid-template-columns: 1fr; }
  .option-grid, .product-gallery { grid-template-columns: repeat(2, 1fr); }
  .product-list-summary { min-height: 0; }
  .dimension-heading, .barrel-dimension-layout, .heater-models-head { grid-template-columns: 1fr; }
  .room-dimension-grid, .finish-spec-grid-three { grid-template-columns: 1fr; }
  .heater-model-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .use-intro, .use-section-head, .use-proof { grid-template-columns: 1fr; }
  .use-section-head { align-items: start; }
  .use-cost-grid, .use-link-grid { grid-template-columns: 1fr; }
  .use-link-card { min-height: 0; }
  .product-catalog-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 600px) {
  .sub-hero { min-height: 62vh; }
  .sub-hero h1 { font-size: 2rem; }
  .products-hero { min-height: 42vh; }
  .case-list, .guide-steps { grid-template-columns: 1fr; }
  .fact-list div, .company-data div { grid-template-columns: 1fr; gap: .25rem; }
  .article-card { padding: 1.25rem; }
  .column-card-grid { grid-template-columns: 1fr; }
  .article-comparison { grid-template-columns: 1fr; }
  .article-bottom-nav { align-items: flex-start; flex-direction: column; }
  .option-grid { grid-template-columns: 1fr; }
  .product-gallery-three { grid-template-columns: 1fr; }
  .room-showcase-gallery { grid-template-columns: 1fr; }
  .product-list-grid, .related-products-grid .related-product { grid-template-columns: 1fr; }
  .related-products-grid .related-product > img { height: 14rem; min-height: 0; object-fit: contain; }
  .detail-media, .related-product-visual { min-height: 0; }
  .finish-spec-grid { grid-template-columns: 1fr; }
  .heater-model-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .barrel-dimension-layout { padding: 1rem; }
  .barrel-dimension-svg { min-width: 620px; }
  .use-page .sub-hero h1 { max-width: 9em; }
  .use-facts, .use-choice-grid, .use-points { grid-template-columns: 1fr; }
  .use-choice-card { grid-template-rows: auto auto; }
  .use-choice-card img { height: 15rem; min-height: 0; }
  .use-proof img { min-height: 20rem; }
  .product-catalog-head { display: block; }
  .product-catalog-head p { margin-top: .75rem; }
  .product-catalog-grid { grid-template-columns: 1fr; }
  .product-catalog-grid--single { grid-template-columns: 1fr; }
  .product-catalog-media { height: 17rem; padding: 1.5rem; }
  .use-intro h2,
  .use-section-head h2 { font-size: 1.65rem; letter-spacing: 0; }
  .use-proof-copy h2,
  .sub-cta h2 { font-size: 1.65rem; }
}