/* 01. Brand, foundations and accessibility */
:root {
  --ink: #111;
  --white: #fff;
  --paper: #f4f5f7;
  --blue: #1f6fd1;
  --blue-dark: #1555a3;
  --blue-pale: #eaf1fa;
  --line: #06c755;
  --line-ink: #07351a;
  --muted: #5c626b;
  --border: #dce0e6;
  --header-height: 96px;
  --content: 1160px;
  --gutter: clamp(24px, 5vw, 80px);
  --section-space: clamp(72px, 9vw, 130px);
  --sans: "Noto Sans JP", sans-serif;
  --serif: "Shippori Mincho", "Yu Mincho", serif;
  --display: "Archivo Black", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-height) + 24px); }
body { margin: 0; padding-top: var(--header-height); color: var(--ink); background: var(--white); font-family: var(--sans); font-size: 15px; line-height: 2; -webkit-font-smoothing: antialiased; overflow-wrap: anywhere; }
body.menu-open { overflow: hidden; }
h1, h2, h3, p, ul, ol { margin: 0; }
h1, h2, h3 { line-height: 1.6; overflow-wrap: normal; }
h2 { font-size: clamp(27px, 3vw, 38px); font-weight: 700; letter-spacing: .06em; }
h3 { font-size: clamp(19px, 2vw, 24px); }
a { color: inherit; text-decoration: none; text-underline-offset: 5px; -webkit-tap-highlight-color: transparent; }
button, input, select, textarea { font: inherit; }
button, a { touch-action: manipulation; }
button { cursor: pointer; }
button, input, select, textarea { border-radius: 0; }
input, select, textarea { min-width: 0; }
img, svg { max-width: 100%; }
svg { display: block; flex-shrink: 0; }
address { font-style: normal; }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 6px; }
.hero :focus-visible, .site-footer :focus-visible, .header-contact:focus-visible { outline-color: #8bc4ff; }
::selection { color: var(--white); background: var(--blue); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
.skip-link { position: fixed; z-index: 200; top: 12px; left: 12px; padding: 12px 24px; background: var(--white); color: var(--ink); transform: translateY(-180%); }
.skip-link:focus { transform: translateY(0); }
.container { width: min(var(--content), calc(100% - var(--gutter) * 2)); margin-inline: auto; }
.narrow { max-width: 900px; }
.section { padding-block: var(--section-space); }
.section-gray { background: var(--paper); }
.eyebrow { color: var(--blue); font: 12px/1.5 var(--display); letter-spacing: .16em; margin-bottom: 18px; }
.section-heading { margin-bottom: 48px; }
.section-heading > p:last-child:not(.eyebrow) { margin-top: 20px; color: var(--muted); }
.icon { width: 24px; height: 24px; }
.mobile-only { display: none; }
.button { display: inline-flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 60px; padding: 16px 24px; font-size: 14px; font-weight: 700; border: 1px solid transparent; transition: background .25s, color .25s, transform .25s; }
.button > .icon:last-child { width: 20px; margin-left: auto; }
.button-white { background: var(--white); color: var(--ink); }
.button-white:hover { background: var(--blue-pale); color: var(--blue-dark); }
.button-blue { background: var(--blue); color: var(--white); }
.button-blue:hover { background: var(--blue-dark); }
.line-button { background: var(--line); color: var(--line-ink); }
.line-button:hover { background: #14dc66; }
.text-link { display: inline-flex; align-items: center; justify-content: space-between; gap: 38px; min-height: 48px; font-size: 14px; font-weight: 700; border-bottom: 1px solid var(--ink); }
.text-link:hover { color: var(--blue); border-color: var(--blue); }
.text-link .icon { width: 20px; transition: transform .25s; }
.text-link:hover .icon { transform: translateX(4px); }

/* 02. Fixed header, shared logo and navigation */
.site-header { position: fixed; z-index: 100; top: 0; left: 0; width: 100%; height: var(--header-height); display: flex; align-items: center; background: var(--white); padding-left: 32px; border-bottom: 1px solid #1111110d; transition: box-shadow .25s; }
.site-header.is-scrolled { box-shadow: 0 4px 25px #1111110d; }
.brand { display: inline-flex; align-items: center; flex-shrink: 0; gap: 17px; }
.brand-symbol { display: flex; flex-direction: column; align-items: center; width: 89px; }
.brand-mark { width: 100%; height: auto; }
.wordmark { width: 100%; margin-top: 4px; text-align: center; font: 11px/1 var(--display); letter-spacing: .04em; }
.brand-name { font-size: 16px; font-weight: 700; letter-spacing: .03em; white-space: nowrap; }
.site-nav { display: flex; align-items: center; gap: clamp(18px, 2.1vw, 32px); margin-left: auto; padding-inline: 30px; }
.site-nav > a { position: relative; display: flex; align-items: center; min-height: 48px; font-size: 14px; font-weight: 700; white-space: nowrap; }
.site-nav > a::after { content: ""; position: absolute; bottom: 0; left: 0; width: 100%; height: 2px; background: var(--blue); transform: scaleX(0); transform-origin: left; transition: transform .25s; }
.site-nav > a:hover::after, .site-nav > a[aria-current]::after { transform: scaleX(1); }
.site-nav > a[aria-current] { color: var(--blue-dark); }
.header-phone { padding-right: 24px; white-space: nowrap; }
.header-phone > span { display: block; font-size: 11px; text-align: center; }
.header-phone strong { display: flex; align-items: center; gap: 7px; font: 19px/1.7 var(--display); letter-spacing: -.02em; }
.header-phone .icon { width: 18px; height: 18px; }
.header-contact { align-self: stretch; width: 108px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px; background: var(--blue); color: var(--white); transition: background .25s; }
.header-contact:hover { background: var(--blue-dark); }
.header-contact span { font: 10px/1 var(--display); letter-spacing: .08em; }
.header-contact .icon { width: 25px; height: 25px; }
.menu-toggle, .menu-contact, .mobile-contact { display: none; }

/* 03. Home / abstract air and ductwork hero */
.hero { position: relative; isolation: isolate; display: flex; align-items: center; min-height: min(750px, 83svh); padding-block: 90px 125px; color: var(--white); background: var(--white); }
.hero-art { position: absolute; z-index: -1; inset: 0; overflow: hidden; background: radial-gradient(ellipse at 90% 30%, #2279c8 0, transparent 50%), linear-gradient(110deg, #101c2b 5%, #133c68 66%, #0b58a0); clip-path: polygon(0 0, 100% 0, 100% 89%, 0 100%); }
.hero-art::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, #08121c4d 0%, transparent 75%); }
.hero-mark { position: absolute; width: min(70vw, 1000px); top: 23%; right: -6%; color: #fff; opacity: .075; transform: rotate(-8deg); }
.airflow { position: absolute; inset: 0; width: 100%; height: 100%; color: #b7e0ff; stroke-width: 1; opacity: .38; animation: airflow-drift 14s ease-in-out infinite alternate; }
.hero-grid { position: absolute; inset: 0; background-image: linear-gradient(#ffffff06 1px, transparent 1px), linear-gradient(90deg, #ffffff06 1px, transparent 1px); background-size: 86px 86px; mask-image: linear-gradient(90deg, transparent, #000); }
.hero-content { position: relative; padding-block: 10px; }
.hero-kicker { display: flex; align-items: center; gap: 16px; font-size: 12px; letter-spacing: .14em; margin-bottom: 24px; }
.hero-kicker::before { content: ""; width: 28px; height: 1px; background: #fff; }
.hero h1 { font-family: var(--serif); font-size: clamp(38px, 5.1vw, 69px); font-weight: 500; line-height: 1.65; letter-spacing: .09em; }
.hero-english { font-family: var(--sans); font-size: clamp(11px, 1.2vw, 14px); letter-spacing: .06em; margin-top: 18px; color: #dceaf7; }
.hero-description { font-size: 14px; line-height: 2.1; letter-spacing: .06em; margin-top: 32px; }
.hero .button { margin-top: 32px; min-width: 290px; }
.hero-scroll { position: absolute; right: var(--gutter); bottom: 120px; display: flex; align-items: center; gap: 15px; writing-mode: vertical-rl; font-size: 12px; letter-spacing: .2em; }
.scroll-line { height: 78px; width: 1px; background: #ffffff4d; overflow: hidden; }
.scroll-line::after { content: ""; display: block; height: 36px; width: 1px; background: var(--white); animation: scroll-flow 2.6s ease-in-out infinite; }
@keyframes airflow-drift { to { transform: translate(25px, -16px); } }
@keyframes scroll-flow { from { transform: translateY(-40px); } to { transform: translateY(85px); } }
.intro { padding-top: 95px; }
.intro-grid { display: grid; grid-template-columns: 1fr 1.12fr; gap: 80px; }
.intro h2 { font-size: clamp(28px, 3vw, 40px); line-height: 1.8; }
.intro-copy { color: #424851; }
.intro-copy p + p { margin-top: 22px; }
.intro-copy .text-link { margin-top: 24px; color: var(--ink); }
.service-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.service-card { display: block; background: var(--white); transition: box-shadow .3s; }
.service-card:hover { box-shadow: 0 12px 34px #12305b12; }
.service-visual { position: relative; display: flex; align-items: center; justify-content: center; height: 260px; overflow: hidden; background: linear-gradient(135deg, #eaf0f6, #f5f8fc); color: var(--blue-dark); }
.service-visual::before, .service-visual::after { content: ""; position: absolute; width: 400px; height: 1px; background: #1f6fd114; transform: rotate(-32deg); }
.service-visual::before { margin-top: 90px; }
.service-visual::after { margin-top: 140px; }
.service-icon { width: 240px; height: 160px; transition: transform .5s; }
.service-card:hover .service-icon { transform: translateY(-5px); }
.service-visual > span { position: absolute; bottom: 18px; left: 26px; color: #426287; font: 10px/1.4 var(--display); letter-spacing: .14em; }
.service-card-body { padding: 32px 34px 34px; }
.service-card h3 { font-size: clamp(20px, 2vw, 25px); margin-bottom: 16px; }
.service-card-body > p { color: var(--muted); font-size: 14px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; padding: 0; list-style: none; margin-top: 22px; }
.chips li { padding: 4px 12px; background: var(--paper); font-size: 14px; }
.service-card .text-link { width: 100%; margin-top: 25px; border-color: var(--border); }
.commitment-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 48px; }
.commitment-rule { display: block; height: 3px; width: 36px; background: var(--blue); margin-bottom: 26px; }
.commitment-grid h3 { font-size: 22px; margin-bottom: 16px; }
.commitment-grid p { color: var(--muted); font-size: 14px; }

/* 04. Shared page headers and service details */
.page-head { position: relative; isolation: isolate; overflow: hidden; padding-block: 82px 78px; background: var(--paper); border-bottom: 1px solid var(--border); }
.page-head h1 { font-size: clamp(36px, 5vw, 55px); letter-spacing: .1em; margin-bottom: 20px; }
.page-head .container > p:last-child { color: var(--muted); max-width: 720px; font-size: 14px; }
.page-head .eyebrow { margin-bottom: 15px; }
.page-motif { position: absolute; z-index: -1; width: 460px; right: -65px; bottom: 20px; transform: rotate(-12deg); opacity: .025; }
.breadcrumb { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; min-height: 64px; color: var(--muted); font-size: 12px; }
.breadcrumb a { display: inline-flex; align-items: center; min-height: 44px; }
.breadcrumb a:hover { color: var(--blue); }
.service-detail { scroll-margin-top: 24px; }
.detail-heading { display: flex; align-items: center; justify-content: space-between; gap: 24px; border-bottom: 1px solid var(--border); padding-bottom: 32px; }
.detail-heading h2 { font-size: clamp(27px, 3.4vw, 40px); margin-bottom: 12px; }
.detail-heading > div > p:last-child { color: var(--muted); font-size: 14px; }
.detail-visual { color: var(--blue-dark); padding-inline: 30px; }
.section-intro { color: #424851; margin-block: 32px 38px; }
.detail-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.detail-grid.four { grid-template-columns: repeat(2, 1fr); }
.detail-card { border-top: 3px solid var(--blue); padding: 28px; background: var(--white); box-shadow: 0 0 0 1px var(--border); }
.detail-card h3 { font-size: 24px; margin-bottom: 14px; }
.detail-lead { font-size: 15px; font-weight: 700; margin-bottom: 12px; }
.detail-card > p:last-child { color: var(--muted); font-size: 14px; }
.flow { display: grid; grid-template-columns: repeat(5, 1fr); gap: 24px; list-style: none; padding: 0; }
.flow li { position: relative; padding-top: 22px; border-top: 1px solid var(--border); }
.flow li:not(:last-child)::after { content: "→"; position: absolute; top: 22px; right: -20px; color: var(--blue); }
.step-number { font: 30px/1.5 var(--display); color: var(--blue); }
.flow h3 { font-size: 17px; margin-block: 18px 12px; }
.flow p { color: var(--muted); font-size: 14px; }

/* 05. Company and access */
.greeting-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 80px; align-items: center; }
.greeting-art { position: relative; display: flex; flex-direction: column; justify-content: center; align-items: center; min-height: 465px; background: var(--paper); padding: 40px; }
.greeting-art::after { content: ""; position: absolute; right: 0; bottom: 0; border-style: solid; border-width: 0 0 60px 80px; border-color: transparent transparent var(--white) transparent; }
.greeting-mark { width: 240px; }
.greeting-art > span[lang] { font: clamp(21px, 2vw, 30px)/1.6 var(--display); letter-spacing: .04em; margin-top: 12px; }
.greeting-art > span:last-child { font-size: 12px; letter-spacing: .12em; margin-top: 25px; }
.greeting h2 { font-size: 26px; margin-bottom: 26px; }
.greeting-lead { font-family: var(--serif); font-size: clamp(24px, 2.5vw, 30px); line-height: 1.9; margin-bottom: 22px; }
.greeting > p:not(.eyebrow):not(.greeting-lead):not(.signature) { color: #424851; margin-bottom: 18px; font-size: 14px; }
.signature { text-align: right; font-size: 14px; margin-top: 30px; }
.signature > span { display: block; margin-top: 8px; }
.signature strong { font-size: 22px; font-weight: 500; letter-spacing: .14em; margin-left: 14px; }
.company-table { border-collapse: collapse; width: 100%; text-align: left; font-size: 14px; }
.company-table th, .company-table td { border-bottom: 1px solid var(--border); padding: 26px 22px; vertical-align: top; }
.company-table th { width: 165px; font-weight: 500; }
.company-table td { background: #ffffff80; }
.company-table a { display: inline-flex; align-items: center; min-height: 44px; }
.company-table a:hover { text-decoration: underline; }
.table-english { display: block; margin-top: 4px; color: var(--muted); font-size: 12px; }
.access-heading { display: flex; justify-content: space-between; align-items: center; gap: 24px; margin-bottom: 30px; }
.access-heading p { font-size: 14px; }
.map { display: block; width: 100%; height: 420px; border: 0; background: var(--paper); }

/* 06. Contact methods, form and validation */
.contact-band { padding-block: 70px 76px; background: var(--blue-pale); border-top: 1px solid #d6e2f1; }
.contact-band .section-heading { text-align: center; margin-bottom: 36px; }
.contact-band h2 { font-size: clamp(24px, 3vw, 34px); }
.contact-band .section-heading > p:last-child { font-size: 14px; }
.contact-actions { display: grid; grid-template-columns: 1.35fr 1fr 1fr; align-items: center; gap: 20px; }
.contact-call { display: flex; flex-direction: column; justify-content: center; align-items: center; line-height: 1.7; }
.contact-call > span { display: flex; align-items: center; gap: 8px; font-size: 12px; }
.contact-call .icon { width: 16px; height: 16px; }
.contact-call strong { font: clamp(23px, 2.5vw, 30px)/1.6 var(--display); }
.contact-call:hover strong { color: var(--blue-dark); }
.contact-actions .button { padding-inline: 20px; gap: 12px; font-size: 14px; min-height: 66px; }
.contact-options { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.contact-option { display: flex; flex-direction: column; align-items: center; border: 1px solid var(--border); padding: 38px 20px 28px; text-align: center; transition: border-color .25s, background .25s; }
.contact-option:hover { border-color: var(--blue); background: #f7faff; }
.contact-option > .icon { width: 38px; height: 38px; color: var(--blue); margin-bottom: 24px; }
.contact-option h3 { font-size: 20px; margin-bottom: 20px; }
.contact-option strong { font-size: 16px; min-height: 38px; }
.contact-option .option-phone { font: clamp(18px, 2vw, 24px)/1.6 var(--display); }
.contact-option .option-email { font-size: clamp(12px, 1.25vw, 16px); }
.contact-option > span { display: flex; align-items: center; justify-content: space-between; gap: 14px; width: 100%; border-top: 1px solid var(--border); margin-top: 24px; padding-top: 18px; font-size: 14px; }
.contact-option > span .icon { width: 18px; }
.option-line { background: #f5fcf7; }
.option-line > .icon { color: #087b39; }
.option-line:hover { background: #edfcf2; border-color: #087b39; }
.form-guide { font-size: 12px; margin-bottom: 30px; display: flex; align-items: center; gap: 10px; }
.required-label { display: inline-block; font-size: 12px; font-weight: 500; line-height: 1.6; background: var(--blue); color: var(--white); padding: 2px 6px; margin-left: 10px; vertical-align: middle; }
.form-guide .required-label { margin-left: 0; }
.optional-label { font-size: 12px; color: var(--muted); font-weight: 400; margin-left: 10px; }
.form-row { display: grid; grid-template-columns: 200px 1fr; align-items: start; gap: 24px; margin-bottom: 28px; }
.form-row label { padding-block: 13px; font-size: 14px; font-weight: 500; }
.form-row input, .form-row select, .form-row textarea { display: block; width: 100%; border: 1px solid #bcc4d0; padding: 13px 16px; line-height: 1.7; background: var(--white); color: var(--ink); font-size: 16px; }
.form-row textarea { resize: vertical; min-height: 170px; }
.form-row input::placeholder, .form-row textarea::placeholder { color: #70767e; font-size: 14px; }
.form-row :focus-visible { outline-offset: 2px; }
.form-row [aria-invalid="true"] { border: 2px solid #a52c28; }
.form-note { font-size: 12px; color: var(--muted); line-height: 1.9; margin-block: 14px; }
.form-note a { text-decoration: underline; }
.form-status { font-size: 14px; color: var(--blue-dark); }
.form-status.is-error { color: #8c2824; }
.form-status:not(:empty) { margin-block: 20px; }
.form-submit { display: flex; width: min(100%, 440px); margin: 30px auto; }
.fallback-note { text-align: center; }

/* 07. Footer and error page */
.site-footer { padding-block: 65px 24px; background: var(--ink); color: var(--white); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 48px; }
.footer-brand { margin-bottom: 25px; }
.footer-brand .brand-name { font-size: 17px; }
.site-footer address { color: #c6c9cf; font-size: 14px; line-height: 1.7; }
.site-footer address > a { display: inline-flex; align-items: center; min-height: 44px; }
.site-footer address > a:hover { color: var(--white); text-decoration: underline; }
.footer-nav { display: grid; grid-template-columns: 1fr 1fr; align-content: start; gap: 12px 30px; padding-top: 4px; }
.footer-nav a { display: flex; align-items: center; min-height: 44px; border-bottom: 1px solid #ffffff24; font-size: 14px; }
.footer-nav a:hover { color: #a1cfff; }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; gap: 20px; border-top: 1px solid #ffffff24; padding-top: 24px; margin-top: 42px; color: #aeb3bb; font-size: 12px; }
.footer-bottom small { font-size: 12px; }
.not-found { padding-block: 110px 130px; text-align: center; }
.not-found .eyebrow { font-size: 90px; color: #b2c8e3; }
.not-found h1 { font-size: clamp(26px, 4vw, 40px); margin-bottom: 24px; }
.not-found > p:not(.eyebrow) { font-size: 14px; color: var(--muted); }
.not-found .button { margin-top: 38px; }
.not-found-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 24px; margin-top: 26px; }
.not-found-links a { display: inline-flex; align-items: center; min-height: 44px; font-size: 14px; text-decoration: underline; }

/* 08. Progressive scroll reveal; content remains visible without JS */
@media (prefers-reduced-motion: no-preference) {
  .reveal.is-pending { opacity: 0; transform: translateY(22px); }
  .reveal.is-visible { animation: reveal-up .7s ease both; }
  @keyframes reveal-up { from { opacity: 0; transform: translateY(22px); } to { opacity: 1; transform: translateY(0); } }
}

/* 09. Responsive layouts */
@media (max-width: 1199px) {
  .site-header { padding-left: 22px; }
  .site-header .brand { gap: 12px; }
  .site-header .brand-symbol { width: 75px; }
  .site-header .wordmark { font-size: 9.3px; }
  .site-header .brand-name { font-size: 14px; }
  .site-nav { gap: 18px; padding-inline: 22px; }
  .header-phone { padding-right: 18px; }
  .header-phone strong { font-size: 16px; }
  .header-phone > span { font-size: 11px; }
  .header-contact { width: 88px; }
  .intro-grid, .greeting-grid { gap: 45px; }
  .contact-actions { grid-template-columns: 1fr 1fr; }
  .contact-call { grid-column: 1 / -1; margin-bottom: 10px; }
  .contact-actions .button { justify-content: center; }
  .contact-actions .button > .icon:last-child { margin-left: 15px; }
}
@media (min-width: 900px) and (max-width: 1020px) {
  .header-phone { display: none; }
  .header-contact { width: 96px; }
}
@media (max-width: 899px) {
  :root { --header-height: 78px; --gutter: 28px; }
  body { padding-bottom: calc(60px + env(safe-area-inset-bottom)); }
  .site-header { padding-inline: 24px; justify-content: space-between; }
  .site-header .brand-symbol { width: 72px; }
  .site-header .wordmark { font-size: 8.9px; }
  .site-header .brand-name { font-size: 14px; }
  .header-phone, .header-contact { display: none; }
  .menu-toggle { display: flex; flex-direction: column; justify-content: center; gap: 6px; align-items: center; width: 48px; height: 54px; padding: 4px; border: 0; background: transparent; color: var(--ink); }
  .menu-toggle > span:not(.menu-caption) { display: block; flex-shrink: 0; height: 1.5px; width: 27px; background: currentColor; transition: transform .25s; }
  .menu-toggle[aria-expanded="true"] > span:first-child { transform: translateY(3.75px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] > span:nth-child(2) { transform: translateY(-3.75px) rotate(-45deg); }
  .menu-caption { margin-top: 2px; font-size: 11px; line-height: 1.5; white-space: nowrap; }
  .site-nav { position: fixed; top: var(--header-height); bottom: 0; left: 0; width: 100%; padding: 35px var(--gutter) calc(90px + env(safe-area-inset-bottom)); background: var(--white); display: flex; align-items: stretch; flex-direction: column; gap: 0; overflow-y: auto; }
  .js .site-nav { visibility: hidden; opacity: 0; pointer-events: none; }
  .js .site-nav.is-open { visibility: visible; opacity: 1; pointer-events: auto; }
  .site-nav > a { display: flex; align-items: center; min-height: 66px; font-size: 20px; border-bottom: 1px solid var(--border); padding-block: 10px; }
  .site-nav > a::after { content: "↗"; position: static; width: auto; height: auto; background: transparent; margin-left: auto; transform: none; font-size: 20px; color: var(--blue); }
  .menu-contact { display: block; margin-top: 35px; }
  .menu-contact > a { display: flex; align-items: center; gap: 12px; min-height: 54px; font-size: 22px; font-weight: 700; }
  .menu-contact .line-link { font-size: 14px; color: #087b39; }
  .mobile-contact { display: grid; grid-template-columns: 1fr 1fr; position: fixed; z-index: 110; bottom: 0; left: 0; right: 0; min-height: calc(60px + env(safe-area-inset-bottom)); padding-bottom: env(safe-area-inset-bottom); background: var(--blue); box-shadow: 0 -3px 12px #11111110; }
  .mobile-contact > a { display: flex; align-items: center; justify-content: center; min-height: 60px; gap: 12px; font-size: 14px; font-weight: 700; color: var(--white); }
  .mobile-contact > .line-button { color: var(--line-ink); }
  .mobile-contact .icon { width: 22px; height: 22px; }
  .menu-open .mobile-contact { visibility: hidden; }
  .hero { min-height: 660px; padding-block: 75px 120px; }
  .hero h1 { font-size: clamp(40px, 7vw, 58px); }
  .hero-mark { width: 90vw; top: 38%; right: -25%; }
  .hero-scroll { bottom: 105px; right: 28px; }
  .hero-art { clip-path: polygon(0 0, 100% 0, 100% 93%, 0 100%); }
  .intro-grid { grid-template-columns: 1fr; gap: 35px; }
  .intro { padding-top: 65px; }
  .intro-copy { max-width: 650px; }
  .service-grid { gap: 22px; }
  .service-visual { height: 220px; }
  .service-card-body { padding: 26px 24px; }
  .commitment-grid { gap: 25px; }
  .commitment-grid h3 { font-size: 19px; }
  .detail-grid { grid-template-columns: 1fr; gap: 22px; }
  .detail-grid.four { grid-template-columns: repeat(2, 1fr); }
  .detail-card { padding: 25px; }
  .flow { grid-template-columns: 1fr; gap: 0; }
  .flow li { display: grid; grid-template-columns: 50px 1fr; column-gap: 20px; padding-block: 26px; }
  .step-number { grid-row: span 2; font-size: 26px; }
  .flow h3 { font-size: 18px; margin: 0 0 8px; }
  .flow p { font-size: 14px; }
  .flow li:not(:last-child)::after { content: "↓"; top: auto; right: auto; bottom: -15px; left: 16px; z-index: 1; background: var(--white); padding-inline: 5px; }
  .greeting-grid { grid-template-columns: 1fr; gap: 45px; }
  .greeting-art { min-height: 300px; }
  .greeting-art > span[lang] { font-size: 30px; }
  .greeting-mark { width: 235px; }
  .contact-options { grid-template-columns: 1fr; gap: 18px; }
  .contact-option { padding: 25px; }
  .contact-option > .icon { margin-bottom: 14px; }
  .contact-option h3 { margin-bottom: 10px; }
  .contact-option .option-phone { font-size: 28px; }
  .contact-option .option-email { font-size: 18px; }
  .contact-option > span { max-width: 360px; margin-top: 18px; }
  .form-row { grid-template-columns: 165px 1fr; gap: 20px; }
  .footer-grid { grid-template-columns: 1fr; gap: 38px; }
  .footer-nav { max-width: 500px; }
  .footer-bottom { align-items: start; flex-direction: column; gap: 10px; }
  html:not(.js) .site-header { position: relative; height: auto; flex-wrap: wrap; padding-block: 16px; }
  html:not(.js) body { padding-top: 0; }
  html:not(.js) .menu-toggle { display: none; }
  html:not(.js) .site-nav { position: static; padding: 15px 0 0; flex-direction: row; flex-wrap: wrap; gap: 10px 24px; }
  html:not(.js) .site-nav > a { font-size: 14px; min-height: 44px; }
  html:not(.js) .site-nav > a::after, html:not(.js) .menu-contact { display: none; }
}
@media (max-width: 599px) {
  :root { --gutter: 24px; }
  body { font-size: 14px; }
  .site-header { padding-inline: 18px; }
  .site-header .brand { gap: 10px; }
  .site-header .brand-symbol { width: 64px; }
  .site-header .wordmark { font-size: 7.9px; }
  .site-header .brand-name { font-size: 13px; letter-spacing: 0; }
  .hero { min-height: 650px; }
  .hero h1 { font-size: clamp(34px, 8.5vw, 48px); letter-spacing: .07em; line-height: 1.8; }
  .hero-kicker { font-size: 12px; letter-spacing: .05em; gap: 10px; margin-bottom: 22px; }
  .hero-kicker::before { width: 20px; }
  .hero-description { font-size: 14px; margin-top: 25px; }
  .hero-english { font-size: 12px; letter-spacing: .01em; }
  .hero .button { font-size: 14px; padding-inline: 18px; min-width: 265px; gap: 15px; margin-top: 28px; }
  .hero-scroll { display: none; }
  .hero-mark { width: 125vw; max-width: none; top: 44%; right: -40%; opacity: .06; }
  .section-heading { margin-bottom: 32px; }
  .eyebrow { font-size: 10px; margin-bottom: 14px; }
  .intro h2 { font-size: 29px; }
  .service-grid { grid-template-columns: 1fr; gap: 28px; }
  .service-visual { height: 225px; }
  .service-card-body { padding: 25px 24px 30px; }
  .service-card h3 { font-size: 21px; }
  .commitment-grid { grid-template-columns: 1fr; gap: 32px; }
  .commitment-grid article { padding-bottom: 28px; border-bottom: 1px solid var(--border); }
  .commitment-rule { margin-bottom: 18px; }
  .commitment-grid h3 { font-size: 22px; margin-bottom: 12px; }
  .page-head { padding-block: 52px; }
  .page-head h1 { margin-bottom: 18px; font-size: 36px; }
  .page-head .container > p:last-child { font-size: 14px; }
  .page-motif { width: 310px; right: -100px; }
  .detail-heading { align-items: start; padding-bottom: 28px; }
  .detail-heading h2 { font-size: 26px; }
  .detail-heading > div > p:last-child { font-size: 14px; }
  .detail-visual { display: none; }
  .detail-grid.four { grid-template-columns: 1fr; }
  .section-intro br { display: none; }
  .flow { grid-template-columns: 1fr; gap: 0; }
  .flow li { display: grid; grid-template-columns: 50px 1fr; column-gap: 20px; padding-block: 26px; }
  .step-number { grid-row: span 2; font-size: 26px; }
  .flow h3 { font-size: 18px; margin: 0 0 8px; }
  .flow p { font-size: 14px; }
  .flow li:not(:last-child)::after { content: "↓"; top: auto; right: auto; bottom: -15px; left: 16px; z-index: 1; background: var(--white); padding-inline: 5px; }
  .greeting-art { min-height: 270px; padding: 30px; }
  .greeting-mark { width: 200px; }
  .greeting-art > span[lang] { font-size: 25px; }
  .greeting-art > span:last-child { font-size: 12px; }
  .company-table { table-layout: fixed; }
  .company-table th, .company-table td { padding: 22px 10px; font-size: 14px; }
  .company-table th { width: 5.5em; padding-left: 0; }
  .table-english { font-size: 12px; }
  .access-heading { align-items: start; flex-direction: column; gap: 16px; }
  .access-heading p { font-size: 14px; }
  .map { height: 330px; }
  .contact-band { padding-block: 55px; }
  .contact-band h2 { font-size: 23px; }
  .mobile-only { display: block; }
  .contact-band .section-heading > p:last-child { font-size: 14px; }
  .contact-actions { grid-template-columns: 1fr; gap: 14px; }
  .contact-call { margin-bottom: 10px; }
  .contact-call strong { font-size: 29px; }
  .contact-actions .button { min-height: 60px; justify-content: start; }
  .contact-actions .button > .icon:last-child { margin-left: auto; }
  .contact-options-section h2 { font-size: 26px; }
  .contact-option { padding-inline: 22px; }
  .form-row { grid-template-columns: 1fr; gap: 8px; margin-bottom: 24px; }
  .form-row label { padding-block: 0; }
  .form-submit { gap: 10px; padding-inline: 14px; font-size: 14px; }
  .form-submit > .icon { width: 19px; }
  .fallback-note { text-align: left; }
  .site-footer { padding-top: 50px; }
  .footer-brand { gap: 12px; }
  .footer-brand .brand-symbol { width: 70px; }
  .footer-brand .wordmark { font-size: 8.7px; }
  .footer-brand .brand-name { font-size: 13px; }
  .site-footer address { font-size: 14px; }
  .footer-nav { gap: 8px 24px; }
  .footer-bottom { font-size: 12px; }
  .not-found { padding-block: 65px 85px; }
  .not-found .eyebrow { font-size: 72px; }
  .not-found > p:not(.eyebrow) br { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}