:root{--ink:#15191b;--steel:#242a2d;--paper:#f2f1ed;--white:#fff;--copper:#b76836;--line:#c9c8c2;--muted:#6f7577;--max:1280px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);background:var(--paper);font:16px/1.9 "Noto Sans JP",sans-serif}
body.nav-open{overflow:hidden}
a{color:inherit;text-decoration:none}
h1,h2,h3,p{margin-top:0}
h1,h2,h3{text-wrap:balance;line-break:strict}
.progress{position:fixed;z-index:100;left:0;top:0;height:3px;background:var(--copper);transition:width .1s}
.header{position:fixed;z-index:50;top:0;left:0;right:0;height:88px;padding:0 max(28px,calc((100% - var(--max))/2));display:flex;align-items:center;justify-content:space-between;color:#fff;background:linear-gradient(180deg,rgba(15,18,19,.78),transparent);transition:.35s}
.header.scrolled{height:70px;background:rgba(21,25,27,.97);border-bottom:1px solid #3c4244}
.brand{display:flex;align-items:center;gap:12px}
.brand-mark{width:44px;height:44px;display:grid;place-items:center;border:1px solid var(--copper);color:var(--copper);font:800 18px "Barlow Condensed";letter-spacing:.05em}
.brand b{display:block;font-size:15px;letter-spacing:.12em}
.brand small{display:block;color:#adb1b1;font:600 10px "Barlow Condensed";letter-spacing:.22em}
.header nav{display:flex;gap:42px;align-items:center}
.header nav a{position:relative;font:600 12px "Barlow Condensed";letter-spacing:.18em}
.header nav a:after{content:"";position:absolute;left:0;right:100%;bottom:-9px;height:1px;background:var(--copper);transition:.3s}
.header nav a:hover:after,.header nav a.active:after{right:0}
.menu{display:none;background:none;border:0}
.hero{min-height:760px;height:100svh;display:grid;grid-template-columns:46% 54%;grid-template-rows:100%;align-items:stretch;position:relative;overflow:hidden;color:#fff;background:var(--ink)}
.hero-copy{height:100%;padding:170px 5vw 100px max(32px,calc((100vw - var(--max))/2));display:flex;flex-direction:column;justify-content:center;position:relative;z-index:2;background:var(--ink)}
.eyebrow,.section-no{color:var(--copper);font:700 11px "Barlow Condensed";letter-spacing:.24em}
.hero h1{margin:25px 0 30px;font-size:clamp(3.5rem,6.4vw,7rem);font-weight:700;line-height:1.16;letter-spacing:.02em}
.hero h1 em{font-style:normal;color:var(--copper)}
.hero-copy>p:not(.eyebrow){color:#c4c8c8;line-height:2.1}
.hero-actions{display:flex;align-items:center;gap:34px;margin-top:30px}
.btn{min-height:58px;padding:16px 28px;display:inline-flex;align-items:center;justify-content:center;border:0;font-weight:700;letter-spacing:.05em;cursor:pointer}
.btn.copper{color:#fff;background:var(--copper)}
.btn.light{color:var(--ink);background:#fff}
.text-link{font-size:13px;font-weight:700;border-bottom:1px solid currentColor}
.hero-image{height:100%;position:relative;background:linear-gradient(90deg,rgba(21,25,27,.25),transparent),url("https://images.unsplash.com/photo-1541123437800-1bb1317badc2?auto=format&fit=crop&w=1600&q=88") center/cover}
.hero-image:before{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(17,20,21,.7),transparent 55%)}
.hero-image span{position:absolute;right:30px;bottom:34px;color:#ddd;font:600 10px "Barlow Condensed";letter-spacing:.2em}
.hero-rail{position:absolute;left:22px;bottom:24px;display:flex;align-items:center;gap:12px;transform-origin:left bottom;transform:rotate(-90deg);font:600 9px "Barlow Condensed";letter-spacing:.2em}
.hero-rail i{width:60px;height:1px;background:var(--copper)}
.hero-rail small{color:#8e9698}
.statement{max-width:var(--max);margin:auto;padding:150px 28px;display:grid;grid-template-columns:180px 1fr;gap:55px;align-items:start}
.statement h2{font-size:clamp(2.6rem,3.5vw,3.55rem);line-height:1.5;margin-bottom:0}
.service-intro h2{font-size:clamp(2.3rem,4.5vw,4.8rem);line-height:1.45}
.statement>div{display:grid;grid-template-columns:minmax(480px,1.45fr) minmax(280px,.8fr);gap:60px;align-items:center}
.statement>div p{max-width:390px;margin:0;color:var(--muted)}
.works-preview{padding:130px max(28px,calc((100% - var(--max))/2));background:#e5e4df}
.section-head{display:flex;justify-content:space-between;align-items:end;margin-bottom:55px}
.section-head h2,.company-data>h2,.process>h2{font-size:clamp(2.6rem,5vw,5rem);margin:5px 0 0}
.work-list{border-top:1px solid #aeb1af}
.work-list a{min-height:140px;padding:25px 20px;display:grid;grid-template-columns:90px 1fr 40px;align-items:center;border-bottom:1px solid #aeb1af;transition:.3s}
.work-list a:hover{padding-left:36px;color:#fff;background:var(--steel)}
.work-list a>span,.work-list a>b{color:var(--copper);font:700 16px "Barlow Condensed"}
.work-list small{color:var(--muted);font:600 10px "Barlow Condensed";letter-spacing:.18em}
.work-list a:hover small{color:#aeb5b6}
.work-list h3{margin:5px 0 0;font-size:25px}
.craft{display:grid;grid-template-columns:54% 46%;min-height:760px;background:var(--ink);color:#fff}
.craft-image{position:relative;background:linear-gradient(0deg,rgba(21,25,27,.72),transparent 55%),url("https://images.unsplash.com/photo-1504307651254-35680f356dfd?auto=format&fit=crop&w=1500&q=86") center/cover}
.craft-image span{position:absolute;left:40px;bottom:38px;color:#fff;font:700 12px/1.6 "Barlow Condensed";letter-spacing:.22em}
.craft-copy{padding:110px max(38px,calc((100vw - var(--max))/2)) 90px 7vw}
.craft-copy h2{font-size:clamp(2.2rem,4vw,4.2rem);line-height:1.45;margin:22px 0 30px}
.craft-copy>p:not(.section-no){color:#b8bcbc}
.craft-copy ul{list-style:none;padding:0;margin:45px 0 0;border-top:1px solid #414749}
.craft-copy li{padding:18px 0;display:flex;justify-content:space-between;border-bottom:1px solid #414749}
.craft-copy li b{color:var(--copper)}
.craft-copy li span{color:#aeb4b4;font-size:13px}
.numbers{display:grid;grid-template-columns:repeat(3,1fr);background:var(--copper);color:#fff}
.numbers>div{padding:55px 5vw;border-right:1px solid rgba(255,255,255,.3)}
.numbers small,.numbers span{display:block}
.numbers b{display:block;font:700 clamp(2rem,4vw,4.2rem) "Barlow Condensed";letter-spacing:.04em}
.numbers small{font-size:11px}
.numbers span{font-size:14px}
.cta{padding:130px max(28px,calc((100% - var(--max))/2));color:#fff;background:linear-gradient(120deg,#242a2d,#111415);position:relative;overflow:hidden}
.cta:after{content:"HVAC";position:absolute;right:-20px;bottom:-80px;color:rgba(255,255,255,.035);font:800 230px "Barlow Condensed"}
.cta h2{position:relative;z-index:1;font-size:clamp(2.2rem,4.5vw,4.7rem);line-height:1.45}
.cta .btn{position:relative;z-index:1}
.page-hero{min-height:480px;padding:180px max(28px,calc((100% - var(--max))/2)) 80px;display:flex;flex-direction:column;justify-content:end;color:#fff;background-color:var(--ink);position:relative;overflow:hidden}
.page-hero:after{content:"";position:absolute;right:6%;top:22%;width:34vw;height:34vw;border:1px solid #4b5051;transform:rotate(45deg)}
.page-hero p{color:var(--copper);font:700 12px "Barlow Condensed";letter-spacing:.23em}
.page-hero h1{font-size:clamp(3.6rem,8vw,7.5rem);line-height:1;margin:12px 0 25px;z-index:1}
.page-hero span{color:#b5baba;z-index:1}
.service-intro{max-width:var(--max);margin:auto;padding:130px 28px 90px}
.service-grid{max-width:var(--max);margin:0 auto;padding:0 28px 140px;display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line)}
.service-grid article{padding:65px;background:var(--paper)}
.service-grid article>span{float:right;color:#d0cec8;font:800 90px "Barlow Condensed";line-height:.8}
.service-grid small{color:var(--copper);font:700 10px "Barlow Condensed";letter-spacing:.2em}
.service-grid h2{clear:both;font-size:30px;margin:25px 0}
.service-grid p{color:var(--muted)}
.service-grid ul{padding-left:20px}
.process{padding:120px max(28px,calc((100% - var(--max))/2));background:#deddd8}
.process ol{list-style:none;padding:0;margin:50px 0 0;display:grid;grid-template-columns:repeat(4,1fr)}
.process li{padding:25px;border-left:1px solid #a7aaa8}
.process li b{display:block;color:var(--copper);font:700 34px "Barlow Condensed"}
.process li span{font-size:14px}
.message{max-width:var(--max);margin:auto;padding:140px 28px;display:grid;grid-template-columns:1fr 1fr;gap:100px}
.message h2,.safety h2,.contact-lead h2{font-size:clamp(2.3rem,4.5vw,4.5rem);line-height:1.5}
.message>div:last-child p{color:var(--muted);margin-bottom:25px}
.message>div:last-child b{display:block;margin-top:40px;text-align:right}
.company-data{padding:120px max(28px,calc((100% - var(--max))/2));background:#deddd8}
.company-data dl{margin-top:50px}
.company-data dl div{padding:23px 10px;display:grid;grid-template-columns:240px 1fr;border-top:1px solid #aeb1af}
.company-data dl div:last-child{border-bottom:1px solid #aeb1af}
.company-data dt{font-weight:700}
.company-data dd{margin:0;color:#4f5557}
.safety{padding:130px max(28px,calc((100% - var(--max))/2));display:grid;grid-template-columns:1fr 1fr;gap:90px}
.safety ul{list-style:none;padding:0;border-top:1px solid var(--line)}
.safety li{padding:25px 0;display:flex;gap:35px;border-bottom:1px solid var(--line)}
.safety b{color:var(--copper);font-family:"Barlow Condensed"}
.contact-wrap{max-width:var(--max);margin:auto;padding:130px 28px;display:grid;grid-template-columns:.85fr 1.15fr;gap:100px}
.contact-lead>p:not(.section-no){color:var(--muted)}
.contact-lead ul{padding:25px 0 0;list-style:none;border-top:1px solid var(--line)}
.contact-lead li{padding:10px 0;border-bottom:1px solid var(--line)}
form{padding:55px;background:#fff;border-top:4px solid var(--copper)}
form label{display:block;margin-bottom:25px;font-weight:700}
form label>span{float:right;color:var(--copper);font-size:12px}
input,select,textarea{width:100%;margin-top:8px;padding:15px;border:1px solid #c8c9c6;border-radius:0;background:#f8f8f6;font:inherit}
textarea{resize:vertical}
.check{display:flex;align-items:center;gap:10px;font-weight:500!important}
.check input{width:auto;margin:0}
.check span{float:none!important;color:inherit!important;font-size:14px!important}
.form-note,.form-success{margin:18px 0 0;color:var(--muted);font-size:13px}
.form-success{padding:14px;border-left:3px solid var(--copper);background:#f4eee9}
footer{padding:70px max(28px,calc((100% - var(--max))/2));display:grid;grid-template-columns:1fr 1fr;gap:40px;color:#c6c9c9;background:#0d1011}
footer .brand{color:#fff}
footer>div{display:flex;gap:25px;justify-content:end;font-size:13px}
footer>p{text-align:right;font-size:13px}
footer>small{grid-column:1/-1;padding-top:25px;border-top:1px solid #323638;color:#73797a}
.reveal{opacity:0;transform:translateY(35px);transition:.8s cubic-bezier(.2,.7,.2,1)}
.reveal.show{opacity:1;transform:none}

@media(max-width:900px){.header{height:72px;padding:0 20px;background:rgba(21,25,27,.96)}
.menu{display:grid;width:44px;height:44px;place-content:center;gap:7px}
.menu i{display:block;width:24px;height:1px;background:#fff}
.header nav{position:fixed;inset:72px 0 0;padding:60px 30px;display:flex;flex-direction:column;align-items:flex-start;background:rgba(21,25,27,.99);transform:translateX(100%);transition:.35s}
.header nav.open{transform:none}
.header nav a{font-size:20px}
.hero{height:auto;min-height:100svh;grid-template-columns:1fr;grid-template-rows:auto auto}
.hero-copy{height:auto;min-height:650px;padding:145px 30px 90px}
.hero-image{height:auto;min-height:420px}
.hero-rail{display:none}
.statement,.statement>div,.message,.safety,.contact-wrap{grid-template-columns:1fr}
.statement,.message,.safety,.contact-wrap{padding-top:90px;padding-bottom:90px;gap:45px}
.statement>div{grid-template-columns:1fr;gap:25px}
.craft{grid-template-columns:1fr}
.craft-image{min-height:500px}
.craft-copy{padding:80px 30px}
.service-grid{grid-template-columns:1fr}
.service-grid article{padding:45px 30px}
.process ol{grid-template-columns:1fr 1fr}
.company-data dl div{grid-template-columns:180px 1fr}
}

/* Meaning-based mobile line breaks */
@media(max-width:600px){.sp-line{display:block!important}p br{display:block!important}}

@media(max-width:600px){body{font-size:16px}
.brand-mark{width:38px;height:38px}
.brand b{font-size:13px}
.brand small{font-size:8px}
.hero-copy{min-height:610px}
.hero h1{font-size:3.7rem}
.hero-actions{align-items:flex-start;flex-direction:column}
.hero-image{min-height:330px}
.statement>div{display:block}
.statement h2{font-size:2.6rem}
.works-preview,.cta,.company-data{padding-top:85px;padding-bottom:85px}
.section-head{align-items:flex-start;flex-direction:column;gap:20px}
.work-list a{grid-template-columns:46px 1fr 20px;min-height:118px;padding:18px 4px}
.work-list h3{font-size:19px}
.craft-image{min-height:380px}
.craft-copy h2{font-size:2.5rem}
.craft-copy li{display:block}
.craft-copy li span{display:block;margin-top:4px}
.numbers{grid-template-columns:1fr}
.numbers>div{padding:35px 30px;border-right:0;border-bottom:1px solid rgba(255,255,255,.3)}
.page-hero{min-height:420px;padding-top:140px}
.page-hero h1{font-size:3.8rem}
.service-intro h2,.message h2,.safety h2,.contact-lead h2{font-size:2.35rem}
.service-grid{padding:0 16px 90px}
.service-grid article>span{font-size:66px}
.process ol{grid-template-columns:1fr}
.company-data dl div{grid-template-columns:1fr;gap:8px}
.company-data dd{font-size:14px}
.contact-wrap{padding-left:18px;padding-right:18px}
form{padding:35px 20px}
footer{grid-template-columns:1fr;padding-top:55px}
footer>div{justify-content:flex-start;flex-wrap:wrap}
footer>p{text-align:left}
footer>small{grid-column:auto}
}

@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}
.reveal{opacity:1;transform:none}
}

/* Mobile Japanese line-break refinement 2026-09-15 */
@media(max-width:600px){
  h1,h2,h3{text-wrap:balance;line-break:strict;overflow-wrap:normal}
  p,li,dd{line-break:strict;overflow-wrap:anywhere}
  p br{display:none}
  h1 br,h2 br,h3 br{display:block}
  .hero h1{font-size:clamp(2.75rem,12vw,3.5rem);line-height:1.28}
  .statement h2,.craft-copy h2,.service-intro h2,.message h2,.safety h2,.contact-lead h2{font-size:clamp(2rem,9.5vw,2.6rem);line-height:1.5}
  .page-hero h1{font-size:clamp(2.75rem,12vw,3.45rem)}
}

@media(max-width:600px){.sp-line{display:block!important}p br{display:block!important}}
/* Mobile rule: keep industry terms and compound nouns on one line. */
@media(max-width:600px){.term-keep{display:inline-block;white-space:nowrap;max-width:100%}}


/* Shared Japanese line-breaking rules: preserve phrases without wasting width. */
html{line-break:strict}
h1,h2,h3,.lead,.catch,.copy{text-wrap:balance;overflow-wrap:normal;word-break:normal}
p,li,dt,dd,figcaption{text-wrap:pretty;overflow-wrap:break-word;word-break:normal}
@supports (word-break:auto-phrase){h1,h2,h3,.lead,.catch,.copy,p,li,dt,dd,figcaption{word-break:auto-phrase}}


/* Semantic Japanese line groups for mobile headings and copy. */
.semantic-lines>.semantic-line{display:inline}
@media(max-width:600px){
  .semantic-lines>br{display:none!important}
  .semantic-lines>.semantic-line{
    display:block;
    width:max-content;
    max-width:100%;
    white-space:nowrap;
    text-wrap:nowrap;
  }
  .principle-title{font-size:clamp(1.8rem,7.6vw,2rem)!important;line-height:1.55!important}
  .service-scope-title{font-size:clamp(1.85rem,7.8vw,2.05rem)!important;line-height:1.55!important}
  .cta-title{font-size:clamp(1.8rem,7.6vw,2rem)!important;line-height:1.6!important}
  .semantic-copy>span{display:block;width:max-content;max-width:100%;white-space:nowrap}
}


/* Desktop layout: use horizontal space and preserve meaningful Japanese lines. */
@media(min-width:901px){
  .hero{grid-template-columns:56% 44%}
  .hero-copy{padding:150px 4vw 90px 7vw}
  .hero h1{
    font-size:clamp(4rem,5vw,6.2rem);
    line-height:1.2;
    white-space:nowrap;
  }
  .craft{grid-template-columns:48% 52%}
  .craft-copy{padding:105px 5vw 85px 5vw}
  .craft-copy h2{
    font-size:clamp(2.4rem,3.5vw,3.7rem);
    line-height:1.45;
    white-space:nowrap;
  }
  .service-scope-title{
    font-size:clamp(2.4rem,4vw,4rem)!important;
    line-height:1.45!important;
    white-space:nowrap;
  }
}

/* Approved phrase boundaries on all screen sizes. */
.phrase-heading{white-space:normal!important;text-wrap:wrap!important;word-break:normal;overflow-wrap:normal;min-width:0}
.phrase-heading>.phrase-unit{display:inline-block;white-space:nowrap!important;text-wrap:nowrap!important;word-break:normal;overflow-wrap:normal;font:inherit;color:inherit;letter-spacing:inherit}
.phrase-heading>wbr{display:inline}