:root{
    --navy:#0B1E33;
    --navy-2:#0F2942;
    --blue:#273B7B;
    --signal:#3752AB;
    --steel:#8FA3B8;
    --steel-light:#C4CDD5;
    --bg:#F4F6F8;
    --ink:#12202E;
    --ink-soft:#4A5A6A;
    --line:#D8DEE4;
    --white:#FFFFFF;
    --font-jp:'Noto Sans JP', sans-serif;
    --font-display:'Barlow Condensed', sans-serif;
    --font-mono:'JetBrains Mono', monospace;
    --header-h:82px;
  }
  *{margin:0;padding:0;box-sizing:border-box;}
  html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 14px);}
  body{
    font-family:var(--font-jp);
    overflow-x:hidden;
    color:var(--ink);
    background:var(--bg);
    line-height:1.78;
    font-weight:500;
    letter-spacing:.01em;
    -webkit-font-smoothing:antialiased;
  }
  a{color:inherit;text-decoration:none;}
  img{max-width:100%;display:block;}
  .wrap{max-width:1180px;margin:0 auto;padding:0 32px;}

  /* ---------- dimension-line signature element ---------- */
  .dim{
    display:flex;align-items:center;gap:8px;
    font-family:var(--font-display);
    font-size:13px;font-weight:700;letter-spacing:.10em;
    color:#5874D2;
  }
  .dim::before,.dim::after{content:"";width:18px;height:1px;background:var(--signal);position:relative;}
  .dim::before{background:linear-gradient(to right, transparent, var(--signal));}
  .dim-tick{width:1px;height:8px;background:var(--signal);}


  /* ---------- anchor / footer navigation fixes ---------- */
  section[id], .cta[id], .career-card[id]{scroll-margin-top:calc(var(--header-h) + 14px);}

  /* ---------- header ---------- */
  header{
    position:sticky;top:0;z-index:50;
    background:rgba(255,255,255,0.98);
    backdrop-filter:blur(10px);
    -webkit-backdrop-filter:blur(10px);
    border-bottom:1px solid #DCE3EA;
    box-shadow:0 8px 26px rgba(11,30,51,0.08);
  }
  .nav{
    display:flex;align-items:center;justify-content:space-between;
    height:88px;position:relative;gap:22px;
  }
  .logo{
    display:flex;align-items:center;min-width:0;
    flex:0 1 365px;
  }
  .logo img{
    display:block;
    width:min(100%, 365px);
    height:auto;
    max-height:54px;
    object-fit:contain;
    object-position:left center;
  }
  .nav-links{display:flex;gap:28px;align-items:center;}
  .nav-links a{
    color:#26384C;font-size:14px;font-weight:800;
    letter-spacing:.02em;position:relative;padding:8px 0;
  }
  .nav-links a:hover{color:#004DA0;}
  .nav-links a::after{
    content:"";position:absolute;bottom:0;left:0;width:0;height:2px;
    background:#004DA0;transition:width .25s;
  }
  .nav-links a:hover::after{width:100%;}
  .nav-cta{
    font-family:var(--font-display);font-size:13px;font-weight:800;
    color:#fff;background:#004DA0;
    padding:11px 20px;border-radius:3px;
    letter-spacing:.09em;flex-shrink:0;
    box-shadow:0 4px 12px rgba(0,77,160,.18);
  }
  .nav-cta:hover{background:#003E82;}
  .mobile-menu{display:none;position:relative;flex-shrink:0;}
  .mobile-menu summary{
    list-style:none;width:42px;height:42px;display:flex;align-items:center;justify-content:center;
    color:#17324D;font-size:26px;font-weight:700;line-height:1;cursor:pointer;user-select:none;
    border:1px solid #D2DBE4;border-radius:4px;background:#fff;
  }
  .mobile-menu summary::-webkit-details-marker{display:none;}
  .mobile-menu summary::before{content:"☰";}
  .mobile-menu[open] summary::before{content:"×";font-size:30px;}
  .mobile-nav{
    position:fixed;top:var(--header-h);left:0;right:0;z-index:70;
    display:flex;flex-direction:column;gap:0;padding:18px 22px 22px;
    background:rgba(255,255,255,.995);
    border-top:1px solid #E0E6EC;border-bottom:1px solid #D8E0E8;
    box-shadow:0 16px 28px rgba(11,30,51,.14);
  }
  .mobile-nav a{
    display:block;padding:14px 4px;color:#20364C;font-size:15px;font-weight:800;
    border-bottom:1px solid #E5EAF0;
  }
  .mobile-nav a:last-child{border-bottom:none;color:#004DA0;}

  /* ---------- hero ---------- */
  .hero{
    position:relative;background:var(--navy);color:var(--white);
    overflow:hidden;padding:120px 0 100px;
  }
  .hero-grid{
    position:absolute;inset:0;
    background-image:
      linear-gradient(rgba(46,134,255,0.10) 1px, transparent 1px),
      linear-gradient(90deg, rgba(46,134,255,0.10) 1px, transparent 1px);
    background-size:48px 48px;
    -webkit-mask-image:linear-gradient(to bottom, rgba(0,0,0,0.9), transparent 85%);
    mask-image:linear-gradient(to bottom, rgba(0,0,0,0.9), transparent 85%);
  }
  .hero-inner{position:relative;z-index:2;}
  .hero .dim{margin-bottom:28px;}
  .hero h1{
    font-size:42px;font-weight:900;line-height:1.45;letter-spacing:.01em;
    max-width:820px;
    line-break:strict;word-break:normal;overflow-wrap:normal;text-wrap:balance;
  }
  .hero-line{display:block;}
  .hero h1 em{font-style:normal;color:var(--signal);}
  .hero p.lead{
    margin-top:24px;max-width:600px;color:#D0D8E2;font-size:16px;font-weight:500;line-height:1.95;
  }
  .hero-actions{display:flex;gap:16px;margin-top:44px;flex-wrap:wrap;}
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    max-width:100%;min-width:0;
    padding:15px 28px;font-size:14px;font-weight:700;letter-spacing:.025em;
    line-height:1.45;text-align:center;white-space:normal;overflow-wrap:anywhere;
    border-radius:2px;transition:all .2s;
  }
  .btn-sub{white-space:nowrap;}
  .btn-primary{background:var(--signal);color:var(--navy);}
  .btn-primary:hover{background:#4E6BC4;transform:translateY(-1px);}
  .btn-outline{border:1px solid rgba(255,255,255,0.3);color:var(--white);}
  .btn-outline:hover{border-color:var(--signal);color:var(--signal);}


  /* ---------- stats band ---------- */
  .stats{background:var(--navy-2);border-top:1px solid rgba(255,255,255,0.08);}
  .stats-grid{display:grid;grid-template-columns:repeat(4,1fr);}
  .stat{
    padding:26px 32px;text-align:left;
    border-left:1px solid rgba(255,255,255,0.08);
  }
  .stat:first-child{border-left:none;}
  .stat .val{font-family:var(--font-mono);font-size:23px;font-weight:650;color:var(--white);}
  .stat .val span{color:var(--signal);font-size:12px;margin-left:2px;}
  .stat .label{margin-top:8px;font-size:12px;color:var(--steel);letter-spacing:.04em;}

  /* ---------- section heading ---------- */
  .section{padding:100px 0;}
  .section-alt{background:var(--white);}
  .eyebrow{
    display:flex;align-items:center;gap:10px;
    font-family:var(--font-display);font-size:13px;font-weight:800;
    color:var(--blue);letter-spacing:.12em;margin-bottom:16px;
  }
  .eyebrow::before{content:"";width:24px;height:1px;background:var(--blue);}
  .section h2{font-size:34px;font-weight:800;line-height:1.45;letter-spacing:.015em;max-width:640px;}
  .section .desc{margin-top:16px;max-width:640px;color:var(--ink-soft);font-size:15px;font-weight:500;line-height:1.9;}

  .prod-cat{margin-top:48px;}
  .prod-cat:first-child{margin-top:56px;}
  .prod-cat-label{
    font-family:var(--font-display);font-size:13px;font-weight:700;color:var(--blue);
    letter-spacing:.10em;padding-bottom:12px;border-bottom:1px solid var(--line);margin-bottom:4px;
  }
  .prod-row{
    display:grid;grid-template-columns:200px 1fr 130px 160px;gap:24px;align-items:start;
    padding:20px 0;border-bottom:1px solid var(--line);
  }
  .prod-row .model{font-family:var(--font-mono);font-size:13px;color:var(--ink);font-weight:700;letter-spacing:.01em;}
  .prod-row .model small{display:block;font-family:var(--font-jp);font-size:11.5px;color:#718295;font-weight:600;margin-top:4px;}
  .prod-row .desc-cell{font-size:13.5px;font-weight:500;color:var(--ink-soft);line-height:1.85;}
  .prod-row .spec{font-family:var(--font-mono);font-size:13px;font-weight:700;color:var(--blue);text-align:right;}
  .prod-row .spec small{display:block;color:#718295;font-size:10.5px;font-weight:600;margin-top:3px;}
  .prod-links{display:flex;gap:8px;justify-content:flex-end;flex-wrap:wrap;}
  .prod-link{
    display:inline-flex;align-items:center;justify-content:center;min-width:68px;
    padding:7px 10px;border:1px solid var(--line);font-size:11px;font-family:var(--font-mono);font-weight:700;
    color:var(--blue);background:var(--white);transition:all .2s;
  }
  .prod-link:hover{border-color:var(--blue);background:var(--bg);}
  .prod-link.pdf::after{content:" PDF";font-size:9px;color:var(--steel);margin-left:3px;}

  /* ---------- business cards ---------- */
  .biz-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;margin-top:56px;background:var(--line);border:1px solid var(--line);}
  .biz-card{background:var(--white);padding:40px 32px;position:relative;}
  .biz-card .idx{font-family:var(--font-display);font-size:13px;font-weight:800;letter-spacing:.10em;color:var(--signal);}
  .biz-card h3{margin-top:20px;font-size:20px;font-weight:800;letter-spacing:.01em;}
  .biz-card p{margin-top:12px;font-size:14px;font-weight:500;color:var(--ink-soft);line-height:1.85;}
  .biz-card .tol{
    margin-top:24px;padding-top:16px;border-top:1px solid var(--line);
    font-family:var(--font-mono);font-size:11px;font-weight:600;color:var(--steel);
    display:flex;justify-content:space-between;
  }
  .biz-card .tol b{color:var(--blue);font-weight:700;}

  /* ---------- history ---------- */
  .tech{background:var(--navy);color:var(--white);}
  .history-list{margin-top:56px;border-top:1px solid rgba(255,255,255,0.12);max-width:920px;}
  .history-item{
    display:grid;grid-template-columns:150px 1fr;gap:32px;
    padding:28px 0;border-bottom:1px solid rgba(255,255,255,0.12);
  }
  .history-item .year{font-family:var(--font-mono);color:#5874D2;font-size:13px;font-weight:700;line-height:1.7;}
  .history-item h4{font-size:18px;font-weight:800;}
  .history-item p{margin-top:8px;font-size:14px;font-weight:500;color:#CBD5DF;line-height:1.85;}

  /* ---------- editable facilities / clients ---------- */
  .facility-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:48px;margin-top:48px;}
  .facility-title{font-family:var(--font-display);font-size:13px;font-weight:800;letter-spacing:.10em;color:var(--blue);margin-bottom:16px;}
  .clients-grid{margin-top:40px;display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);}
  .client-item{background:var(--white);padding:18px 20px;font-size:13.5px;font-weight:600;color:var(--ink-soft);}

  /* ---------- about preview ---------- */
  .about-grid{display:grid;grid-template-columns:1.1fr 0.9fr;gap:72px;align-items:center;}
  .about-table{margin-top:32px;border-top:1px solid var(--line);}
  .about-row{display:grid;grid-template-columns:120px 1fr;gap:20px;padding:16px 0;border-bottom:1px solid var(--line);font-size:14px;font-weight:500;}
  .about-row .k{color:#718295;font-family:var(--font-display);font-size:12.5px;font-weight:700;letter-spacing:.06em;}
  .about-row .v{color:var(--ink);}
  .about-panel{background:var(--navy);color:var(--white);padding:44px;position:relative;}
  .about-panel .dim{margin-bottom:24px;}
  .about-panel .quote{font-size:18px;font-weight:600;line-height:1.95;}
  .about-panel .quote-by{margin-top:20px;font-family:var(--font-mono);font-size:12px;color:var(--steel);}

  /* ---------- careers ---------- */
  .careers{background:var(--white);}
  .career-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:56px;}
  .career-card{border:1px solid var(--line);padding:32px;transition:border-color .2s;}
  .career-card:hover{border-color:var(--signal);}
  .career-card .tag{font-family:var(--font-mono);font-size:11px;color:var(--signal);}
  .career-card h4{margin-top:14px;font-size:18px;font-weight:800;}
  .career-card p{margin-top:10px;font-size:13.5px;font-weight:500;color:var(--ink-soft);line-height:1.8;}
  .career-card .more{margin-top:20px;font-size:13px;font-weight:700;color:var(--blue);display:inline-flex;align-items:center;gap:6px;}

  /* ---------- news ---------- */
  .news{background:var(--bg);}
  .news-list{margin-top:48px;border-top:1px solid var(--line);}
  .news-row{
    display:grid;grid-template-columns:130px 100px 1fr auto;gap:24px;align-items:center;
    padding:22px 0;border-bottom:1px solid var(--line);
  }
  .news-row .date{font-family:var(--font-mono);font-size:13px;font-weight:600;color:var(--steel);}
  .news-row .cat{font-size:11px;font-family:var(--font-mono);font-weight:700;color:var(--blue);border:1px solid var(--blue);padding:3px 10px;width:fit-content;}
  .news-row .title{font-size:14px;font-weight:600;color:var(--ink);}
  .news-row .arrow{color:var(--steel);font-weight:700;}
  .news-row.is-link{cursor:pointer;}
  .news-row.is-link:hover .title{color:var(--blue);}
  .news-actions{display:flex;justify-content:flex-end;margin-top:28px;}
  .archive-btn{
    appearance:none;border:1px solid var(--navy);background:transparent;color:var(--navy);
    padding:11px 18px;font-family:var(--font-jp);font-size:13px;font-weight:700;cursor:pointer;
    transition:.2s;
  }
  .archive-btn:hover{background:var(--navy);color:var(--white);}
  .news-modal{position:fixed;inset:0;z-index:100;display:none;align-items:center;justify-content:center;padding:24px;}
  .news-modal.is-open{display:flex;}
  .news-modal-backdrop{position:absolute;inset:0;background:rgba(5,18,32,.72);backdrop-filter:blur(3px);-webkit-backdrop-filter:blur(3px);}
  .news-modal-panel{
    position:relative;z-index:1;width:min(880px,100%);max-height:min(80vh,760px);overflow:auto;
    background:var(--white);box-shadow:0 24px 80px rgba(0,0,0,.28);padding:40px;
  }
  .news-modal-head{display:flex;align-items:flex-start;justify-content:space-between;gap:24px;margin-bottom:22px;}
  .news-modal-head h3{font-size:26px;font-weight:900;}
  .news-modal-head p{margin-top:4px;font-size:13px;color:var(--steel);}
  .modal-close{appearance:none;border:0;background:var(--navy);color:var(--white);width:40px;height:40px;font-size:22px;cursor:pointer;flex:0 0 auto;}
  .archive-list{border-top:1px solid var(--line);}
  .archive-list .news-row{grid-template-columns:120px 90px 1fr auto;}
  .map-link{color:var(--blue);font-weight:700;border-bottom:1px solid rgba(39,59,123,.25);}
  .map-link:hover{border-bottom-color:var(--blue);}
  .foot-map-link{color:var(--steel-light);}
  .foot-map-link:hover{color:var(--white);}
  .about-row.no-value{grid-template-columns:1fr;}

  /* ---------- contact cta ---------- */
  .cta{background:var(--navy);color:var(--white);position:relative;overflow:hidden;}
  .cta-inner{
    padding:90px 0;text-align:center;position:relative;z-index:2;
  }
  .cta h2{font-size:34px;font-weight:900;}
  .cta p{margin-top:16px;color:var(--steel-light);font-size:15px;}
  .cta .hero-actions{justify-content:center;margin-top:40px;}

  /* ---------- footer ---------- */
  footer{background:var(--navy-2);color:var(--steel-light);padding:64px 0 32px;}
  .foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:48px;}
  .foot-logo{color:var(--white);font-weight:800;font-size:17px;letter-spacing:.025em;}
  .foot-brand-en{margin-top:5px;font-family:var(--font-display);font-size:11px;font-weight:700;letter-spacing:.13em;color:#AAB8C7;}
  .foot-addr{margin-top:16px;font-size:13px;color:var(--steel);line-height:1.9;}
  .foot-col h5{font-size:12px;font-family:var(--font-mono);color:var(--steel);letter-spacing:.06em;margin-bottom:16px;}
  .foot-col a{display:block;font-size:13px;color:var(--steel-light);margin-bottom:12px;}
  .foot-col a:hover{color:var(--signal);}
  .foot-bottom{
    margin-top:56px;padding-top:24px;border-top:1px solid rgba(255,255,255,0.08);
    display:flex;justify-content:space-between;font-size:12px;color:var(--steel);
    font-family:var(--font-mono);
  }

  /* ---------- responsive ---------- */
  @media(max-width:1080px) and (min-width:901px){
    .nav{gap:14px;}
    .logo{flex-basis:300px;}
    .logo img{max-height:48px;}
    .nav-links{gap:20px;}
    .nav-links a{font-size:13px;}
    .nav-cta{padding:10px 14px;}
  }

  @media(max-width:900px){
    :root{--header-h:74px;}

    /* Mobile performance: avoid expensive live blur/mask repainting while scrolling. */
    header{
      background:#fff;
      backdrop-filter:none;
      -webkit-backdrop-filter:none;
    }
    .news-modal-backdrop{
      backdrop-filter:none;
      -webkit-backdrop-filter:none;
    }
    .hero-grid{
      -webkit-mask-image:none;
      mask-image:none;
      opacity:.48;
    }
    html{scroll-padding-top:calc(var(--header-h) + 10px);}
    section[id], .cta[id], .career-card[id]{scroll-margin-top:calc(var(--header-h) + 10px);}

    .wrap{padding-left:22px;padding-right:22px;}
    .nav{height:74px;gap:12px;}
    .logo{flex:1 1 auto;max-width:calc(100% - 56px);}
    .logo img{width:auto;max-width:100%;max-height:42px;}
    .nav-links,.nav-cta{display:none;}
    .mobile-menu{display:block;}
    .mobile-nav{max-height:calc(100dvh - var(--header-h));overflow:auto;-webkit-overflow-scrolling:touch;}

    .hero{padding:82px 0 72px;}
    .hero .dim{font-size:11px;line-height:1.5;letter-spacing:.055em;align-items:flex-start;}
    .hero .dim::after{display:none;}
    .hero h1{font-size:clamp(26px,7.7vw,32px);line-height:1.52;max-width:100%;text-wrap:pretty;}
    .hero-line{display:inline;}
    .hero h1 em{white-space:nowrap;}
    .hero p.lead{font-size:15px;line-height:1.9;}
    .hero-actions{gap:12px;}

    .stats-grid{grid-template-columns:repeat(2,1fr);}
    .stat{padding:22px 16px;min-width:0;}
    .stat:nth-child(3){border-left:none;}
    .stat .label{line-height:1.55;overflow-wrap:anywhere;}

    .biz-grid{grid-template-columns:1fr;}
    .biz-card,.prod-row,.about-row,.facility-grid>div,.client-item,.news-row>*{min-width:0;}
    .section h2,.section .desc,.biz-card h3,.biz-card p,.history-item p,.career-card p,.cta p{overflow-wrap:anywhere;word-break:normal;}
    .biz-card p,.prod-row .desc-cell,.about-row .v{overflow-wrap:anywhere;}

    .prod-cat-label{line-height:1.55;overflow-wrap:anywhere;}
    .prod-row{grid-template-columns:1fr;gap:8px;}
    .prod-row .spec{text-align:left;}
    .prod-links{justify-content:flex-start;}

    .history-item{grid-template-columns:1fr;gap:8px;}
    .facility-grid{grid-template-columns:1fr;gap:32px;}
    .clients-grid{grid-template-columns:repeat(2,1fr);}
    .about-grid{grid-template-columns:1fr;gap:40px;}
    .about-row{grid-template-columns:minmax(92px,110px) minmax(0,1fr);gap:14px;}
    .about-row.no-value{grid-template-columns:1fr;}
    .about-panel{padding:32px 26px;}
    .career-grid{grid-template-columns:1fr;}

    .news-row,.archive-list .news-row{grid-template-columns:1fr;gap:8px;padding:18px 0;}
    .news-row .title{line-height:1.65;overflow-wrap:anywhere;}
    .news-modal-panel{padding:28px 22px;}
    .news-actions{justify-content:flex-start;}

    .foot-grid{grid-template-columns:1fr 1fr;gap:32px;}
    .cta-inner{padding:70px 0;}
    .cta h2{font-size:28px;line-height:1.5;}
    .cta .hero-actions{width:min(100%,520px);margin-left:auto;margin-right:auto;flex-direction:column;}
    .cta .btn{width:100%;padding:14px 16px;flex-wrap:wrap;}
  }

  @media(max-width:520px){
    :root{--header-h:68px;}
    html{scroll-padding-top:calc(var(--header-h) + 8px);}
    section[id], .cta[id], .career-card[id]{scroll-margin-top:calc(var(--header-h) + 8px);}

    .wrap{padding-left:18px;padding-right:18px;}
    .nav{height:68px;}
    .mobile-nav{padding-left:18px;padding-right:18px;}

    .hero{padding:70px 0 62px;}
    .hero .dim{overflow-wrap:anywhere;}
    .hero h1{font-size:clamp(25px,7.4vw,29px);line-height:1.55;}
    .hero h1 em{white-space:normal;}
    .hero-actions{flex-direction:column;}
    .hero-actions .btn{width:100%;}

    .section{padding:72px 0;}
    .section h2{font-size:28px;}
    .stat{padding:20px 12px;}
    .stat .val{font-size:22px;}
    .stat .label{font-size:11.5px;letter-spacing:0;}
    .biz-card{padding:30px 24px;}
    .biz-card .tol{gap:12px;align-items:flex-start;}
    .biz-card .tol b{text-align:right;}
    .about-row{grid-template-columns:1fr;gap:4px;padding:14px 0;}
    .about-row .k{font-size:11.5px;}
    .client-item{padding:16px 12px;font-size:12.5px;overflow-wrap:anywhere;}

    .news-modal{padding:10px;}
    .news-modal-panel{max-height:88vh;padding:24px 18px;}
    .news-modal-head h3{font-size:22px;}

    .foot-grid{grid-template-columns:1fr;}
    .foot-bottom{gap:12px;flex-direction:column;}
  }

  @media(max-width:480px){
    .logo img{max-height:36px;}
    .mobile-menu summary{width:40px;height:40px;}
  }

  @media(max-width:380px){
    .stat{padding:18px 10px;}
    .cta h2{font-size:25px;}
  }

  @media(max-width:360px){
    .logo img{max-height:32px;}
  }

/* ---------- accessibility / motion ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{transition:none !important;}
}