:root{
    --navy:#121212;
    --navy-soft:#333333;
    --red:#e0322d;
    --ink:#1a1a1a;
    --text:#42506b;
    --muted:#93a4c4;
    --muted-2:#aab7d1;
    --line:#dbe2ec;
    --bg:#ffffff;
    --bg-gray:#f4f6f9;
    --maxw:1400px;
  }
  *{box-sizing:border-box;margin:0;padding:0}
  html{scroll-behavior:smooth}
  body{
    font-family:"Noto Sans JP","Hiragino Kaku Gothic ProN",sans-serif;
    color:var(--text);background:var(--bg);line-height:1.9;
    -webkit-font-smoothing:antialiased;overflow-x:hidden;
  }
  img{max-width:100%;display:block}
  a{color:inherit;text-decoration:none}
  .en{font-family:"Barlow",sans-serif;letter-spacing:.18em}
  .wrap{max-width:var(--maxw);margin:0 auto;padding:0 48px}

  .kick{font-family:"Barlow",sans-serif;font-size:12px;letter-spacing:.24em;color:var(--muted);font-weight:600}
  .kick::after{content:"";display:block;width:28px;height:2px;background:var(--muted);opacity:.55;margin-top:14px}

  .btn{display:inline-flex;align-items:center;gap:16px;padding:15px 28px;font-size:13px;font-weight:700;border:1px solid var(--navy);transition:.2s;font-family:inherit}
  .btn.solid{background:var(--navy);color:#fff}
  .btn.solid:hover{background:var(--navy-soft)}
  .btn.ghost{color:var(--navy)}
  .btn.ghost:hover{background:var(--navy);color:#fff}
  .btn.lg{padding:24px 40px;font-size:15px;gap:22px}

  /* ---------- header ---------- */
  header{
    position:fixed;top:0;left:0;right:0;z-index:100;
    background:rgba(255,255,255,.9);
    backdrop-filter:blur(10px);
    border-bottom:1px solid rgba(215,222,231,.6);
  }
  .nav{
    max-width:var(--maxw);margin:0 auto;
    display:flex;align-items:center;gap:40px;
    padding:18px 48px;
  }
  .logo{display:inline-flex;align-items:center}
  .logo svg{height:30px;width:auto;flex:none}
  .nav-links{display:flex;gap:34px;margin-left:20px}
  .nav-links a{font-size:14px;font-weight:500;color:var(--ink);transition:color .2s}
  .nav-links a:hover{color:var(--red)}
  .nav-cta{margin-left:auto;display:flex;gap:14px}
  .nav-cta .btn{padding:14px 26px;font-size:13px;gap:14px}
  .burger{display:none;margin-left:auto;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:6px}
  .burger span{width:26px;height:2px;background:var(--ink)}
  .nav-item{position:static}
  .nav-item > a{font-size:14px;font-weight:500;color:var(--ink);transition:color .2s;padding:16px 0;display:inline-flex;align-items:center;gap:7px;position:relative}
  .nav-item > a:hover{color:var(--red)}
  .nav-item.has-drop > a::after{content:"";width:6px;height:6px;border-right:1.5px solid var(--muted);border-bottom:1.5px solid var(--muted);transform:rotate(45deg) translateY(-2px);transition:.2s}
  .nav-item.has-drop:hover > a{color:var(--red);font-weight:700}
  .nav-item.has-drop:hover > a::after{border-color:var(--red)}
  .nav-item.has-drop:hover > a::before{content:"";position:absolute;left:0;right:13px;bottom:9px;height:2px;background:var(--red)}
  .mega{position:absolute;left:0;right:0;top:100%;background:var(--bg-gray);border-top:1px solid var(--line);box-shadow:0 34px 60px -34px rgba(20,35,63,.28);z-index:120;opacity:0;visibility:hidden;transform:translateY(-6px);transition:opacity .2s ease,transform .2s ease,visibility .2s}
  .mega::before{content:"";position:absolute;left:0;right:0;top:-26px;height:26px}
  .nav-item.has-drop:hover .mega{opacity:1;visibility:visible;transform:translateY(0)}
  .mega-inner{max-width:var(--maxw);margin:0 auto;padding:46px 48px 52px}
  .mega-grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
  .mcard{position:relative;aspect-ratio:2/1;overflow:hidden;background:var(--navy);display:block}
  .mcard img{width:100%;height:100%;object-fit:cover;opacity:.7;transition:.3s}
  .mcard::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(20,35,63,.12),rgba(20,35,63,.78))}
  .mcard:hover img{opacity:.55;transform:scale(1.04)}
  .mcard .t{position:absolute;left:22px;bottom:22px;z-index:2;color:#fff;font-size:17px;font-weight:700;letter-spacing:.04em}
  .mcard .go{position:absolute;right:18px;bottom:16px;z-index:2;width:36px;height:36px;border:1px solid rgba(255,255,255,.55);border-radius:50%;display:grid;place-items:center;color:#fff;font-size:13px;transition:.2s}
  .mcard:hover .go{background:#fff;color:var(--navy);border-color:#fff}
  .msrow{display:grid;grid-template-columns:1.15fr .85fr;gap:60px;align-items:start}
  .mslabel{font-family:"Barlow";font-size:12px;letter-spacing:.24em;color:var(--muted);font-weight:600;margin-bottom:18px}
  .mslist{display:flex;flex-direction:column}
  .msitem{display:grid;grid-template-columns:auto 1fr auto;gap:22px;align-items:center;padding:17px 8px;border-top:1px solid var(--line);transition:background .15s}
  .mslist .msitem:last-child{border-bottom:1px solid var(--line)}
  .msitem:hover,.msitem.is-active{background:#fff}
  .msitem.is-active .ar{transform:translateX(4px)}
  .msitem .ar{transition:transform .15s;color:var(--navy);font-size:15px}
  .msitem .n{font-family:"Barlow";font-size:21px;font-weight:300;color:var(--navy);border-right:1px solid var(--line);padding-right:22px}
  .msitem .tx b{display:block;font-size:16px;font-weight:700;color:var(--navy);margin-bottom:3px}
  .msitem .tx em{font-style:normal;font-size:12px;color:var(--muted)}
  .msfeat{overflow:hidden}
  .msfeat img{width:100%;height:300px;object-fit:cover;margin-bottom:18px;transition:opacity .18s ease,transform .55s cubic-bezier(.2,.6,.2,1)}
  .msrow:hover .msfeat img{transform:scale(1.06)}
  .msfeat .fh{display:flex;align-items:baseline;gap:16px;margin-bottom:10px}
  .msfeat .fh .n{font-family:"Barlow";font-size:13px;letter-spacing:.12em;color:var(--muted)}
  .msfeat .fh h4{font-size:16px;font-weight:700;color:var(--navy)}
  .msfeat p{font-size:12.5px;color:var(--text);line-height:1.9}
  .msfeat .more{display:inline-flex;align-items:center;gap:14px;margin-top:16px;font-size:13px;font-weight:700;color:var(--navy)}

  .mmenu{display:none;position:fixed;inset:0;z-index:99;background:#fff;padding:100px 28px 40px;flex-direction:column;gap:8px}
  .mmenu.open{display:flex}
  .mmenu a{padding:16px 0;border-bottom:1px solid var(--line);font-weight:500;color:var(--ink)}
  .mmenu .btn{margin-top:20px;justify-content:center}

  /* ---------- article hero ---------- */
  .ahero{position:relative;isolation:isolate;overflow:hidden;background:var(--navy);color:#fff;padding:150px 0 66px}
  .ahero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:-2;opacity:.34}
  .ahero::after{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(180deg,rgba(20,35,63,.55) 0%,rgba(20,35,63,.78) 60%,rgba(20,35,63,.94) 100%)}
  .ahero .crumb{color:rgba(255,255,255,.6);padding:0 0 30px}
  .ahero .crumb a:hover{color:#fff}
  .ahero .crumb .cur{color:rgba(255,255,255,.85)}
  .acat{display:flex;align-items:center;gap:14px;margin-bottom:22px}
  .acat::before{content:"";width:22px;height:2px;background:var(--red)}
  .acat .jp{font-size:12px;font-weight:700;letter-spacing:.08em;color:#fff}
  .acat .en{font-family:"Barlow";font-size:11px;font-weight:600;letter-spacing:.18em;color:rgba(255,255,255,.55)}
  .ahero h1{font-size:clamp(26px,3.6vw,46px);font-weight:900;line-height:1.5;letter-spacing:.02em;color:#fff;max-width:1000px}
  .ameta{display:flex;flex-wrap:wrap;gap:0 26px;margin-top:30px;font-family:"Barlow";font-size:11px;font-weight:500;letter-spacing:.18em;color:rgba(255,255,255,.6)}
  .ameta span{position:relative;padding-left:26px}
  .ameta span:first-child{padding-left:0}
  .ameta span:first-child::before{display:none}
  .ameta span::before{content:"";position:absolute;left:0;top:50%;width:1px;height:12px;background:rgba(255,255,255,.28);transform:translateY(-50%)}

  /* ---------- article body ---------- */
  .abody-wrap{display:flex;gap:66px;justify-content:center;align-items:flex-start;padding:78px 48px 40px;max-width:var(--maxw);margin:0 auto}
  .atoc{width:222px;flex:none;position:sticky;top:118px}
  .atoc .tl{font-family:"Barlow";font-size:11px;font-weight:600;letter-spacing:.2em;color:var(--muted);padding-bottom:16px;border-bottom:1px solid var(--line);margin-bottom:16px}
  .atoc a{display:block;font-size:12.5px;line-height:1.7;color:var(--muted);padding:7px 0 7px 16px;border-left:2px solid var(--line);transition:.2s}
  .atoc a:hover{color:var(--navy)}
  .atoc a.on{color:var(--navy);font-weight:700;border-left-color:var(--red)}
  .abody{width:min(720px,100%)}
  .abody .alead{font-size:17px;font-weight:500;color:var(--ink);line-height:2;padding-bottom:34px;margin-bottom:14px;border-bottom:1px solid var(--line)}
  .abody h2{position:relative;font-size:clamp(21px,2.4vw,27px);font-weight:900;color:var(--navy);letter-spacing:.02em;line-height:1.5;margin:56px 0 22px;scroll-margin-top:120px}
  .abody h2 .hn{display:block;font-family:"Barlow";font-size:13px;font-weight:600;letter-spacing:.16em;color:var(--red);margin-bottom:10px}
  .abody p{font-size:15px;color:var(--text);line-height:2.05;margin:0 0 20px}
  .abody ol,.abody ul{margin:6px 0 26px;padding:0;list-style:none;counter-reset:oi}
  .abody ol li{position:relative;padding:14px 0 14px 46px;border-bottom:1px solid var(--line);font-size:14.5px;color:var(--text);line-height:1.85}
  .abody ol li::before{counter-increment:oi;content:counter(oi,decimal-leading-zero);position:absolute;left:0;top:14px;font-family:"Barlow";font-size:14px;font-weight:600;color:var(--navy)}
  .abody ul.achecks li{position:relative;padding:12px 0 12px 30px;font-size:14.5px;color:var(--text);line-height:1.85;border-bottom:1px solid var(--line)}
  .abody ul.achecks li::before{content:"";position:absolute;left:5px;top:18px;width:7px;height:12px;border-right:2px solid var(--red);border-bottom:2px solid var(--red);transform:rotate(42deg)}
  .abody .apoint{position:relative;background:var(--navy);color:#fff;padding:30px 32px;margin:34px 0 40px}
  .abody .apoint .apoint-l{font-family:"Barlow";font-size:11px;font-weight:600;letter-spacing:.22em;color:var(--red);display:block;margin-bottom:12px}
  .abody .apoint p{font-size:15px;color:#fff;line-height:1.95;margin:0}
  .abody blockquote{margin:36px 0;padding:6px 0 6px 28px;border-left:3px solid var(--red);font-size:17px;font-weight:700;color:var(--navy);line-height:1.85;letter-spacing:.01em}
  .abody .asvc{display:inline-flex;align-items:center;gap:14px;margin-top:8px;font-size:13px;font-weight:700;color:var(--navy);border-bottom:1px solid var(--navy);padding-bottom:4px;transition:gap .25s}
  .abody .asvc:hover{gap:22px}

  .asum{background:var(--bg-gray);border-top:2px solid var(--navy);padding:34px 34px 20px;margin:56px 0 0}
  .asum .st{font-family:"Barlow";font-size:11px;font-weight:600;letter-spacing:.2em;color:var(--navy);margin-bottom:6px}
  .asum .sh{font-size:17px;font-weight:900;color:var(--navy);margin-bottom:14px}
  .asum ul{margin:0;padding:0;list-style:none}
  .asum li{position:relative;padding:12px 0 12px 28px;border-bottom:1px solid var(--line);font-size:14px;color:var(--text);line-height:1.8}
  .asum li:last-child{border-bottom:0}
  .asum li::before{content:"";position:absolute;left:4px;top:16px;width:7px;height:12px;border-right:2px solid var(--navy);border-bottom:2px solid var(--navy);transform:rotate(42deg)}

  .aback{display:inline-flex;align-items:center;gap:14px;margin:46px 0 0;font-family:"Barlow";font-size:12px;font-weight:600;letter-spacing:.16em;color:var(--navy)}
  .aback svg{transform:rotate(180deg)}

  /* ---------- related ---------- */
  .arel{border-top:1px solid var(--line);padding:80px 0}
  .arel .rk{font-family:"Barlow";font-size:12px;font-weight:600;letter-spacing:.2em;color:var(--muted);margin-bottom:28px}
  .rgrid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:26px}
  .rcard{position:relative;isolation:isolate;overflow:hidden;display:flex;flex-direction:column;justify-content:flex-end;min-height:300px;padding:30px 28px 26px;background:var(--navy)}
  .rcard .pbg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:-2;opacity:.82;transition:transform .6s cubic-bezier(.2,.6,.2,1)}
  .rcard::after{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(180deg,rgba(20,35,63,.12),rgba(20,35,63,.5) 52%,rgba(20,35,63,.86))}
  .rcard .pcat{font-family:"Barlow";font-size:10px;font-weight:600;letter-spacing:.16em;color:rgba(255,255,255,.7);display:flex;align-items:center;gap:11px;margin-bottom:12px}
  .rcard .pcat::before{content:"";width:18px;height:2px;background:var(--red)}
  .rcard .pcat .jp{font-family:"Noto Sans JP";font-size:11px;letter-spacing:.08em;color:#fff;font-weight:700}
  .rcard h3{font-size:15px;font-weight:700;color:#fff;line-height:1.7;display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden}
  .rcard .pmore{margin-top:14px;display:inline-flex;align-items:center;gap:10px;font-size:11.5px;font-weight:700;color:#fff;letter-spacing:.04em}
  .rcard:hover .pbg{transform:scale(1.07);opacity:.92}

  /* ---------- cta ---------- */
  .bcta{background:var(--bg-gray);padding:110px 0}
  .bcta .wrap{text-align:center}
  .bcta .kick{display:inline-block;margin-bottom:26px}
  .bcta .kick::after{margin-left:auto;margin-right:auto}
  .bcta h2{font-size:clamp(26px,3.2vw,40px);font-weight:900;color:var(--navy);line-height:1.5;letter-spacing:.03em;margin-bottom:14px}
  .bcta p{font-size:13.5px;color:var(--text);margin-bottom:38px}

  #notfound{max-width:640px;margin:0 auto;padding:200px 48px 140px;text-align:center}
  #notfound h1{font-size:30px;font-weight:900;color:var(--navy);margin-bottom:16px}
  #notfound p{font-size:14px;color:var(--text);margin-bottom:30px}

  /* ---------- responsive ---------- */
  @media(max-width:1100px){
    .wrap,.nav,.foot-grid{padding-left:26px;padding-right:26px}
    .nav-links,.nav-cta{display:none}
    .burger{display:flex}
    .abody-wrap{padding-left:26px;padding-right:26px;gap:0}
    .atoc{display:none}
    .rgrid{gap:16px}
    .foot-grid{grid-template-columns:1fr}
    .foot-nav{border-left:0;padding-left:0}
    .foot-nav ul{grid-template-columns:repeat(2,auto)}
  }
  @media(max-width:820px){
    .rgrid{grid-template-columns:1fr}
  }
  @media(max-width:620px){
    .ahero{padding-top:130px}
    .foot-bottom{flex-wrap:wrap;gap:14px}
  }

  /* ---------- footer ---------- */
  footer{border-top:2px solid var(--navy);padding:72px 0 36px}
  .foot-grid{max-width:var(--maxw);margin:0 auto;padding:0 48px;display:grid;grid-template-columns:1fr 1fr;gap:60px}
  .foot-brand .logo{margin-bottom:30px}
  .foot-brand .logo svg{height:40px}
  .foot-brand h3{font-size:30px;font-weight:900;color:var(--navy);letter-spacing:.06em;margin-bottom:12px}
  .foot-brand p{font-size:13.5px;color:var(--text);margin-bottom:36px}
  .arrow-link{display:inline-flex;align-items:center;gap:18px;font-weight:700;color:var(--navy);font-size:15px;transition:gap .25s}
  .arrow-link:hover{gap:26px}
  .foot-nav{border-left:1px solid var(--line);padding-left:60px}
  .foot-nav ul{list-style:none;display:grid;grid-template-columns:repeat(4,auto);gap:20px 44px;margin-bottom:40px}
  .foot-nav ul a{font-size:13px;font-weight:500;color:var(--ink)}
  .foot-nav ul a:hover{color:var(--red)}
  .foot-bottom{max-width:var(--maxw);margin:40px auto 0;padding:24px 48px 0;border-top:1px solid var(--line);display:flex;align-items:center;gap:30px;font-size:11px;color:var(--muted);font-family:"Barlow";letter-spacing:.12em}
  .iso-badge{height:80px;width:auto;display:block}
  .foot-bottom .pp{border-left:1px solid var(--line);padding-left:30px;color:var(--ink)}

  /* ---------- motion ---------- */
  body{animation:pgin .5s ease both}
  @keyframes pgin{from{opacity:0}to{opacity:1}}
  .reveal{opacity:0;transform:translateY(26px);transition:opacity .7s cubic-bezier(.22,.61,.36,1),transform .7s cubic-bezier(.22,.61,.36,1)}
  .reveal.in{opacity:1;transform:none}
  .reveal:nth-child(2){transition-delay:.05s}
  .reveal:nth-child(3){transition-delay:.1s}
  .reveal:nth-child(4){transition-delay:.15s}
  .reveal:nth-child(5){transition-delay:.2s}
  .reveal:nth-child(6){transition-delay:.25s}
  @media(prefers-reduced-motion:reduce){
    body{animation:none}
    .reveal{opacity:1;transform:none;transition:none}
  }
  /* typing reveal for big titles */
  .ty{visibility:hidden}
  .ty.ty-init{visibility:visible}
  .ty .ty-c{opacity:0}
  .ty .ty-c.on{opacity:1;transition:opacity .1s linear}
  .ty .ty-caret{display:inline-block;width:3px;height:.92em;background:var(--red);border-radius:1px;margin:0 .04em -.03em .07em;animation:tycaret .78s steps(1,end) infinite}
  @keyframes tycaret{0%,49%{opacity:1}50%,100%{opacity:0}}
  .ty.ty-done .ty-caret{opacity:0;animation:none;transition:opacity .35s ease}
  @media(prefers-reduced-motion:reduce){
    .ty{visibility:visible}
    .ty .ty-c{opacity:1}
    .ty .ty-caret{display:none}
  }