:root {
  color-scheme: light;
  --ivory: #faf8f3; --teal: #153d3e; --gold: #6b573b; --muted: #526259;
  --sage: #e4ebe4; --sand: #eee9df; --line: #c9cbbf;
  --sans: 'Noto Sans JP', sans-serif; --serif: 'Noto Serif JP', 'Yu Mincho', serif;
  --ease: cubic-bezier(.22,.61,.36,1); --header-height: 100px;
  --section-space: 100px; --gutter: clamp(32px,6.1vw,100px); --content: 1264px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-height) + 24px); }
body { margin: 0; background: var(--ivory); color: var(--teal); font: 400 16px/1.9 var(--sans); -webkit-font-smoothing: antialiased; }
::selection { background: #dfd2b8; color: var(--teal); }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button,input,textarea { font: inherit; }
button,a,input,textarea { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
button:disabled { cursor: default; opacity: .6; }
.button[aria-disabled="true"] { cursor: default; }
:focus-visible { outline: 2px solid #9b7445; outline-offset: 5px; }
h1,h2,h3,p,figure,dl,dd { margin: 0; }
h1,h2,h3 { font-weight: 400; }
section { scroll-margin-top: 8px; }
.container { width: min(calc(100% - var(--gutter)*2), var(--content)); margin-inline: auto; }
.skip-link { position: fixed; z-index: 30; top: 8px; left: 16px; padding: 12px 20px; background: white; transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }
.site-header { position: sticky; top: 0; z-index: 20; display: flex; align-items: center; gap: 36px; justify-content: space-between; height: var(--header-height); padding: 0 clamp(24px,4.5vw,72px); background: rgba(250,248,243,.95); backdrop-filter: blur(14px); transition: box-shadow .6s var(--ease), background .6s var(--ease); }
.site-header.is-scrolled { background: rgba(250,248,243,.96); box-shadow: 0 1px 0 rgba(107,87,59,.13),0 6px 30px rgba(21,61,62,.025); }
.logo { display: inline-flex; align-items: center; flex-shrink: 0; width: 250px; min-height: 44px; }
.logo img { width: 100%; height: auto; }
.menu-logo { width: 210px; height: auto; margin-bottom: 8px; }
.site-footer .logo { width: 280px; max-width: 100%; padding: 0; background: transparent; }
.logo span { font-size: 12px; letter-spacing: .12em; }
.desktop-nav { display: flex; align-items: center; gap: clamp(18px,2vw,32px); margin-left: auto; font-size: 13px; }
.desktop-nav a,.site-footer nav a { transition: color .4s; position: relative; }
.desktop-nav a::after { content: ''; position: absolute; bottom: -7px; left: 0; width: 100%; height: 1px; background: #a68b65; transform: scaleX(0); transform-origin: left; transition: transform .45s var(--ease); }
.button { position: relative; overflow: hidden; display: inline-flex; justify-content: center; align-items: center; gap: 20px; min-height: 56px; padding: 14px 28px; background: var(--teal); border: 1px solid transparent; border-radius: 3px; color: var(--ivory); font-size: 15px; line-height: 1.7; transition: background .5s, box-shadow .5s; }
.button::after { content: ''; pointer-events: none; position: absolute; inset: -40% -90%; background: linear-gradient(110deg,transparent 38%,rgba(244,235,216,.13) 49%,transparent 61%); transform: translateX(-46%); transition: transform 1.1s var(--ease); }
.header-cta { min-width: 176px; }
.menu-toggle { display: none; }
body.menu-open { overflow: hidden; }
.mobile-menu { position: fixed; inset: 0 auto 0 0; margin: 0; padding: 0; border: 0; width: min(440px,100%); height: 100dvh; max-width: 100%; max-height: 100dvh; background: var(--ivory); color: var(--teal); box-shadow: -10px 0 70px #102b2c15; }
.mobile-menu::backdrop { background: rgba(15,36,36,.38); backdrop-filter: blur(4px); }
.menu-panel { padding: 24px 28px max(28px,env(safe-area-inset-bottom)); min-height: 100%; background: linear-gradient(155deg,var(--ivory) 65%,#f0ebdf); }
.mobile-menu[open] .menu-panel { animation: menu-enter .35s var(--ease); }
@keyframes menu-enter { from { opacity: 0; transform: translateX(-12px); } to { opacity: 1; transform: none; } }
.menu-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 24px; }
.menu-top>p { font-size: 17px; letter-spacing: .16em; }
.menu-top>p>span { display: block; font-size: 9px; color: #8a704b; letter-spacing: .2em; }
.menu-close { display: inline-flex; align-items: center; gap: 12px; min-height: 44px; padding: 8px 0 8px 12px; border: 0; color: var(--teal); background: transparent; font-size: 12px; }
.menu-close span { font-size: 27px; font-weight: 400; }
.mobile-nav { display: grid; }
.mobile-nav>a { min-height: 61px; border-bottom: 1px solid #d7d1c3; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 12px 0; }
.mobile-nav>a>span { font: 400 18px/1.6 var(--serif); }
.mobile-nav small { font-size: 8px; letter-spacing: .08em; color: #8a704b; }
.menu-details { margin: 26px 0; }
.menu-details p { font-size: 11px; color: #8a704b; margin-bottom: 12px; }
.menu-details nav { display: flex; flex-wrap: wrap; gap: 4px 20px; }
.menu-details a { font-size: 12px; padding-block: 10px; text-decoration: underline; text-underline-offset: 5px; text-decoration-color: #c3b59a; }
.menu-contact { width: 100%; }
.menu-note { font-size: 10px; color: var(--muted); text-align: center; margin-top: 12px; }
/* Main layout boundary: mobile <= 768px, desktop > 768px. */
@media (max-width:768px) {
  .menu-toggle { display: flex; flex-direction: column; justify-content: center; align-items: center; gap: 10px; flex: 0 0 44px; min-height: 48px; border: 0; background: transparent; color: var(--teal); padding: 6px; }
  .menu-lines { display: block; width: 24px; height: 8px; border-top: 1px solid currentColor; border-bottom: 1px solid currentColor; }
  .menu-caption { font-size: 8px; line-height: 1; letter-spacing: .1em; }
  .site-header .header-cta { margin-left: auto; }
}
.text-link { display: inline-flex; gap: 18px; align-items: center; width: fit-content; font-size: 14px; font-weight: 500; padding-block: 8px; transition: color .45s; }
.text-link span { transition: transform .5s var(--ease); }
.detail-button { position: relative; isolation: isolate; overflow: hidden; display: inline-flex; align-items: center; justify-content: space-between; gap: 32px; min-height: 58px; min-width: 310px; max-width: 100%; padding: 16px 24px; border: 1px solid #a79575; border-radius: 2px; background: linear-gradient(115deg,rgba(255,255,255,.5),rgba(221,208,178,.13)); color: #665338; font-size: 14px; line-height: 1.8; letter-spacing: .035em; transition: border-color .5s,background-color .5s,box-shadow .5s; }
.detail-button::before { content: ''; position: absolute; z-index: -1; inset: 0; background: linear-gradient(105deg,transparent 25%,rgba(255,249,227,.65) 50%,transparent 75%); transform: translateX(-110%); transition: transform 1s var(--ease); pointer-events: none; }
.detail-button>span { flex: 0 0 30px; width: 30px; height: 30px; display: grid; place-items: center; border-left: 1px solid rgba(167,149,117,.35); padding-left: 15px; font-size: 18px; transition: transform .5s var(--ease); }
.section-dark .detail-button { color: #eadac0; border-color: #9c957e; background: linear-gradient(115deg,rgba(235,218,188,.08),rgba(235,218,188,.025)); }
.section-dark .detail-button::before { opacity: .2; }
.hero-body .detail-button { margin-top: 20px; }
@media (hover:hover) and (pointer:fine) {
  .detail-button:hover { border-color: #8a704b; background-color: rgba(218,203,171,.12); box-shadow: 0 5px 20px rgba(93,73,40,.06); }
  .detail-button:hover::before { transform: translateX(110%); }
  .detail-button:hover>span { transform: translateX(3px); }
  .section-dark .detail-button:hover { border-color: #ddc49a; }
}
@media (max-width:768px) {
  .detail-button { min-width: 0; width: 100%; padding: 16px 20px; gap: 16px; font-size: 13px; }
}
.hero { position: relative; min-height: 740px; isolation: isolate; }
.hero-visual { position: absolute; inset: 0; overflow: hidden; z-index: -1; }
.hero-photo { width: 100%; height: 100%; object-fit: cover; object-position: center; }
.hero-heading { position: absolute; top: 82px; left: var(--gutter); }
.eyebrow { font: 400 12px/1.8 var(--sans); letter-spacing: .12em; color: #936e4f; margin-bottom: 26px; }
.hero-eyebrow { margin-bottom: 34px; }
h1 { font: 400 clamp(38px,3.89vw,62px)/1.55 var(--serif); letter-spacing: .025em; }
.hero-body { padding: 342px var(--gutter) 66px; max-width: 790px; font-size: 18px; }
.hero-small { margin-top: 26px; font-size: 14px; }
.hero-body .text-link { margin-top: 18px; }
.note { font: 400 11px/1.85 var(--sans); color: #69706a; margin-top: 24px; }
.hero-body .note { margin-top: 16px; }
.section { padding-block: var(--section-space); }
.detail-page { min-height: calc(100svh - var(--header-height) - 200px); padding-block: 52px 100px; background: linear-gradient(155deg,var(--ivory) 40%,#f0ebdf); }
.breadcrumb { font-size: 12px; color: #6a7165; margin-bottom: 64px; display: flex; flex-wrap: wrap; gap: 14px; }
.breadcrumb a { text-decoration: underline; text-underline-offset: 5px; }
.preparation-panel { max-width: 760px; border-top: 1px solid #cfc3ad; padding-top: 32px; margin-top: 30px; }
.preparation-panel h2 { font-family: var(--serif); font-size: 24px; color: var(--gold); margin-bottom: 18px; }
.preparation-panel p { color: var(--muted); font-size: 15px; }
.preparation-panel .detail-button { margin-top: 36px; }
.section-title { position: relative; isolation: isolate; display: table; max-width: 100%; font: 400 clamp(28px,2.75vw,40px)/1.65 var(--serif); letter-spacing: .025em; color: var(--gold); padding-block: 8px 16px; margin-bottom: 24px; }
.section-title::before { content: ''; z-index: -1; position: absolute; inset: 0 -3% 0 0; background: url('assets/title-silk.svg') center / 100% 100% no-repeat; opacity: .95; pointer-events: none; }
.section-intro { margin-bottom: 28px; }
.section-link { margin-top: 32px; }
.product-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 32px; margin-top: 38px; }
.photo-wrap { position: relative; overflow: hidden; background: #e8e3d9; }
.photo-wrap img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.3s var(--ease), filter 1.3s; }
.product .photo-wrap { aspect-ratio: 8/7; }
.product-category { margin-top: 20px; font-size: 11px; letter-spacing: .06em; color: #936e4f; }
.product h3 { font: 400 24px/1.6 var(--serif); margin-top: 12px; }
.product-concept { font-size: 15px; font-weight: 500; margin-top: 16px; }
.product-details { font-size: 14px; margin-top: 20px; }
.product-details dt { font-size: 12px; color: #69766a; margin-top: 16px; }
.product-details dd { margin-top: 3px; }
.section-dark { background: var(--teal); color: #e0e6e1; }
.section-dark .eyebrow { color: #d2b297; }
.section-dark .section-title { color: #f4ebd8; }
.section-dark .section-title::before { opacity: .32; }
.section-dark .note { color: #bdcbc5; }
.section-dark .text-link { color: #e0c9b5; }
.service-layout { display: grid; grid-template-columns: 1.05fr 1fr; gap: 64px; margin-top: 10px; align-items: center; }
.service-layout .photo-wrap { aspect-ratio: 1.38; }
.service-list { list-style: none; padding: 0; margin: 28px 0; display: grid; gap: 24px; }
.service-list li { display: flex; align-items: baseline; gap: 18px; }
.service-list li>span { font-size: 12px; color: #d2b297; }
.service-list h3 { font: 500 16px/1.8 var(--sans); }
.service-list p { font-size: 14px; }
.section-sage { background: #f0f1ea; }
.quality-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; margin-top: 36px; }
.quality-grid .photo-wrap { aspect-ratio: 1.85; }
figcaption { font: 400 22px/1.7 var(--serif); margin-top: 20px; }
.steps { padding: 0; margin: 38px 0 28px; list-style: none; display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 40px; }
.step { position: relative; background: #f0eee7; padding: 28px 24px; min-height: 310px; display: flex; flex-direction: column; gap: 18px; }
.step:not(:last-child)::after { content: ''; position: absolute; width: 24px; height: 24px; background: url('assets/step-arrow.svg') center/contain no-repeat; right: -32px; top: calc(50% - 12px); }
.step-first { background: var(--teal); color: var(--ivory); }
.step-second { background: var(--sage); }
.step-label { font-size: 12px; font-weight: 500; }
.step h3 { font: 400 23px/1.6 var(--serif); }
.step>p:not(.step-label) { font-size: 14px; }
.step strong { font-size: 12px; font-weight: 500; margin-top: auto; }
.consultation-band { display: flex; align-items: center; justify-content: space-between; gap: 32px; padding: 28px 32px; background: var(--sage); font-size: 14px; }
.consultation-band .button { flex-shrink: 0; }
.section-sand { background: var(--sand); }
.split-layout { display: grid; grid-template-columns: .9fr 1.65fr; gap: 80px; }
.section-aside { align-self: start; }
.section-aside .section-title { font-size: 34px; }
.section-aside>p:not(.eyebrow) { font-size: 15px; }
.faq-item { padding-bottom: 26px; border-bottom: 1px solid var(--line); margin-bottom: 26px; }
.faq-item:last-child { margin-bottom: 0; }
.faq-item h3 { display: flex; gap: 14px; font: 500 16px/1.85 var(--sans); }
.faq-item h3 span { color: #8a704b; flex-shrink: 0; font-family: var(--serif); }
.faq-item p { color: var(--muted); font-size: 15px; margin: 12px 0 0 32px; }
.about-layout { grid-template-columns: 1.1fr 1fr; align-items: center; }
.company-facts h3 { font-size: 17px; margin-bottom: 24px; }
.company-facts dl { display: grid; grid-template-columns: 80px 1fr; gap: 16px 24px; font-size: 14px; }
.company-facts dt { color: #7a7565; }
.section-contact { background: var(--sage); }
.contact-layout { grid-template-columns: .95fr 1.3fr; }
.contact-small { margin-top: 28px; font-size: 14px; }
.contact-form { display: flex; flex-direction: column; align-items: stretch; }
.contact-form label { display: flex; align-items: baseline; gap: 12px; margin-top: 24px; margin-bottom: 8px; font-size: 14px; }
.required,.optional { font-size: 10px; letter-spacing: .05em; color: #6e6b58; }
input,textarea { border: 1px solid #cbd2c9; background: rgba(255,255,255,.88); color: var(--teal); border-radius: 3px; padding: 13px 16px; width: 100%; transition: border-color .4s,box-shadow .4s; font-size: 16px; }
input { min-height: 52px; }
textarea { resize: vertical; min-height: 150px; }
input:focus,textarea:focus { border-color: #9f906e; box-shadow: 0 0 0 3px rgba(169,151,109,.12); outline: 0; }
::placeholder { color: #849088; font-size: 13px; }
.contact-form .button { margin-top: 28px; width: 100%; }
.form-notice { color: #526259; font-size: 12px; line-height: 1.8; }
.site-footer { background: var(--ivory); color: var(--teal); border-top: 1px solid var(--line); padding: 60px 0; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 18px 30px; font-size: 13px; margin-top: 26px; }
.site-footer .note,.site-footer small { color: var(--muted); }
.site-footer small { font-size: 9px; letter-spacing: .08em; display: block; margin-top: 16px; }
/* Content is visible by default; JS only arms elements below the viewport. */
.reveal.is-pending { opacity: 0; transform: translateY(18px); }
.reveal { transition: opacity .85s var(--ease) var(--reveal-delay,0ms),transform .85s var(--ease) var(--reveal-delay,0ms); }
.reveal:focus-within { opacity: 1; transform: none; }
@media (hover:hover) and (pointer:fine) {
  .desktop-nav a:hover::after { transform: scaleX(1); }
  .desktop-nav a:hover,.site-footer nav a:hover,.text-link:hover { color: #a18255; }
  .button:hover { background: #204b49; box-shadow: 0 8px 28px rgba(21,61,62,.10); }
  .button:hover::after { transform: translateX(46%); }
  .text-link:hover span { transform: translateX(4px); }
  .product:hover .photo-wrap img,.quality-grid figure:hover img,.service-layout figure:hover img { transform: scale(1.025); filter: brightness(1.015); }
}
@media (max-width:1024px) {
  :root { --gutter: 40px; --header-height: 86px; --section-space: 80px; }
  .hero { min-height: 650px; }
  .hero-heading { top: 72px; }
  .hero-body { padding-top: 300px; font-size: 16px; max-width: 560px; }
  .hero-photo { object-position: 45% center; }
  .service-layout,.split-layout { gap: 40px; }
  .steps { gap: 26px; }
  .step { padding: 22px 18px; }
  .step:not(:last-child)::after { width: 18px; height: 18px; right: -22px; }
  .product-grid { gap: 24px; }
  .product h3 { font-size: 21px; }
  .consultation-band { padding: 24px; }
  .consultation-band .button { max-width: 290px; }
}
@media (min-width:768.01px) and (max-width:1024px) {
  .site-header { padding-inline: 24px; gap: 16px; }
  .site-header .logo { width: 190px; }
  .site-header .logo span { display: none; }
  .desktop-nav { gap: 18px; font-size: 12px; }
  .header-cta { min-width: 128px; padding-inline: 16px; font-size: 13px; }
}
@media (max-width:768px) {
  :root { --gutter: 24px; --header-height: 88px; --section-space: 64px; }
  .desktop-nav { display: none; }
  body { font-size: 15px; }
  .site-header { padding-inline: 16px; gap: 10px; }
  .logo { font-size: 20px; }
  .site-header .logo span { display: none; }
  .header-cta { min-width: 104px; min-height: 48px; padding: 12px 10px; font-size: 12px; }
  .site-header .logo { width: clamp(110px, calc(100vw - 210px), 180px); }
  .hero { min-height: 0; }
  .hero-visual { position: relative; z-index: 0; height: auto; aspect-ratio: 390/420; }
  .hero-photo { position: absolute; max-width: none; width: 161.5385%; height: 100%; left: -24.359%; top: 0; object-position: center; }
  .hero-heading { left: 24px; top: 17.14%; }
  .hero-eyebrow { display: none; }
  h1 { font-size: clamp(22px,5.897vw,34px); line-height: 1.6; letter-spacing: .01em; }
  .hero-body { padding: 28px 24px 12px; max-width: none; font-size: 15px; }
  .hero-small { margin-top: 20px; font-size: 12px; }
  .hero-body .note { font-size: 10px; }
  .desktop-break { display: none; }
  .eyebrow { font-size: 10px; margin-bottom: 22px; }
  .section-title,.section-aside .section-title { font-size: 27px; line-height: 1.65; margin-bottom: 20px; padding-block: 8px 12px; }
  .mobile-break { display: block; }
  .product-grid,.quality-grid,.service-layout,.split-layout { grid-template-columns: 1fr; gap: 36px; }
  .product-grid { margin-top: 30px; gap: 42px; }
  .product .photo-wrap { aspect-ratio: 1.14; }
  .product h3 { font-size: 24px; }
  .product-concept { font-size: 15px; }
  .section-intro { margin-bottom: 22px; }
  .note { font-size: 10px; margin-top: 20px; }
  .service-layout { gap: 32px; }
  .service-list { gap: 24px; }
  .service-list h3 { font-size: 15px; }
  .service-list p { font-size: 13px; }
  .service-list li { gap: 14px; }
  .service-layout .photo-wrap { aspect-ratio: 1.3; }
  .quality-grid .photo-wrap { aspect-ratio: 1.5; }
  figcaption { font-size: 20px; margin-top: 16px; }
  .steps { grid-template-columns: 1fr; gap: 42px; margin-top: 30px; }
  .step { min-height: 235px; padding: 26px; gap: 16px; }
  .step:not(:last-child)::after { right: auto; left: calc(50% - 12px); top: auto; bottom: -33px; width: 24px; height: 24px; transform: rotate(90deg); }
  .step strong { margin-top: 2px; }
  .consultation-band { flex-direction: column; align-items: stretch; gap: 24px; padding: 24px; }
  .consultation-band .button { width: 100%; max-width: none; font-size: 13px; padding-inline: 16px; }
  .faq-item h3 { font-size: 15px; gap: 10px; }
  .faq-item p { margin-left: 0; font-size: 14px; }
  .company-facts dl { grid-template-columns: 62px 1fr; gap: 18px 20px; font-size: 13px; }
  .company-facts h3 { font-size: 15px; }
  .site-footer { padding-block: 48px; }
  .site-footer nav { gap: 12px 24px; font-size: 12px; }
  .reveal { transition-delay: 0ms; }
}
@media (max-width:480px) {
  .container { width: calc(100% - 48px); }
  h1 { font-size: clamp(20px,5.897vw,28px); }
  .section-title { letter-spacing: 0; }
  .section-dark .section-title { font-size: clamp(22px,6.2vw,27px); }
}
@media (prefers-reduced-motion:reduce) {
  html { scroll-behavior: auto; }
  *,*::before,*::after { animation: none !important; transition: none !important; }
  .reveal.is-pending { opacity: 1; transform: none; }
  .photo-wrap img { transform: none !important; }
}
@media print {
  .site-header { position: static; }
  .reveal.is-pending { opacity: 1; transform: none; }
  .button,.skip-link { display: none; }
}