:root{
    --bg:#f6f6f3; --ink:#111; --ink-2:#2b2b2b; --mute:#6b6b6b;
    --line:#d8d8d2; --accent:#00d977; --accent-2:#00b6ff;
    --paper:#fff; --warn:#ff5b3a;
  }
  *{box-sizing:border-box;margin:0;padding:0;}
  html,body{background:var(--bg);color:var(--ink);font-family:"Zen Kaku Gothic New",sans-serif;-webkit-font-smoothing:antialiased;}
  body{overflow-x:hidden;}
  a{color:inherit;text-decoration:none;}
  .mono{font-family:"JetBrains Mono",monospace;letter-spacing:.02em;}
  .min{font-family:"Shippori Mincho",serif;}

  .grid-bg{position:fixed;inset:0;pointer-events:none;z-index:0;
    background-image:linear-gradient(to right,rgba(0,0,0,.04) 1px,transparent 1px),linear-gradient(to bottom,rgba(0,0,0,.04) 1px,transparent 1px);
    background-size:80px 80px;}
  .noise{position:fixed;inset:0;pointer-events:none;z-index:1;opacity:.035;mix-blend-mode:multiply;
    background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");}

  header{position:fixed;top:0;left:0;right:0;z-index:50;
    display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
    padding:22px 36px;backdrop-filter:saturate(1.2) blur(10px);
    background:rgba(246,246,243,.7);border-bottom:1px solid var(--line);}
  .logo{display:flex;align-items:center;color:var(--ink);}
  .logo svg{height:32px;width:auto;display:block;}
  nav{display:flex;gap:28px;justify-content:center;}
  nav a{font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-2);position:relative;padding:6px 0;}
  nav a::after{content:"";position:absolute;left:0;right:100%;bottom:0;height:1px;background:var(--ink);transition:right .3s;}
  nav a:hover::after{right:0;}
  nav a.current::after{right:0;background:var(--accent);}
  .meta-right{justify-self:end;display:flex;align-items:center;gap:14px;font-size:11px;color:var(--mute);}
  .meta-right .dot{width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px var(--accent);animation:pulse 2s infinite;}
  @keyframes pulse{0%,100%{opacity:1}50%{opacity:.3}}

  /* HERO */
  .hero{position:relative;z-index:2;padding:140px 36px 60px;border-bottom:1px solid var(--line);}
  .breadcrumb{display:flex;align-items:center;gap:12px;font-family:"JetBrains Mono",monospace;font-size:11px;color:var(--mute);margin-bottom:50px;letter-spacing:.15em;}
  .breadcrumb a:hover{color:var(--accent);}
  .breadcrumb .sep{color:var(--line);}
  .breadcrumb .current{color:var(--ink);}
  .hero-grid{display:grid;grid-template-columns:80px 1fr 280px;gap:36px;align-items:end;}
  .hero-vlabel{writing-mode:vertical-rl;font-family:"JetBrains Mono",monospace;font-size:11px;letter-spacing:.3em;color:var(--mute);height:240px;}
  .hero-main h1{font-family:"Shippori Mincho",serif;font-weight:800;font-size:clamp(56px,8vw,128px);line-height:.92;letter-spacing:-.02em;}
  .hero-main .kicker{display:inline-flex;align-items:center;gap:10px;font-family:"JetBrains Mono",monospace;font-size:11px;letter-spacing:.3em;color:var(--ink-2);border:1px solid var(--ink);padding:6px 14px;border-radius:100px;margin-bottom:30px;}
  .hero-main .kicker .blink{width:8px;height:8px;border-radius:50%;background:var(--accent);}
  .hero-main .lead{font-family:"Shippori Mincho",serif;font-size:20px;line-height:1.9;margin-top:30px;color:var(--ink-2);max-width:640px;}
  .hero-side{padding-left:30px;border-left:1px solid var(--line);}
  .hero-side .label{font-family:"JetBrains Mono",monospace;font-size:10px;color:var(--accent);letter-spacing:.25em;margin-bottom:14px;}
  .hero-side .count{font-family:"Shippori Mincho",serif;font-size:64px;font-weight:800;line-height:1;letter-spacing:-.04em;}
  .hero-side .count .acc{color:var(--accent);}
  .hero-side .count small{font-family:"Zen Kaku Gothic New",sans-serif;font-size:14px;font-weight:400;color:var(--mute);margin-left:6px;}
  .hero-side .note{font-family:"JetBrains Mono",monospace;font-size:11px;color:var(--mute);margin-top:8px;letter-spacing:.1em;}

  /* News List */
  .news-section{position:relative;z-index:2;padding:80px 36px 100px;}
  .news-section .sec-meta{font-family:"JetBrains Mono",monospace;font-size:11px;color:var(--mute);letter-spacing:.2em;margin-bottom:40px;display:flex;justify-content:space-between;align-items:center;}
  .news-section .sec-meta .filter{display:flex;gap:14px;}
  .news-section .sec-meta .filter span{cursor:pointer;color:var(--mute);transition:color .2s;}
  .news-section .sec-meta .filter span:hover,.news-section .sec-meta .filter span.active{color:var(--accent);}

  .news-list{display:flex;flex-direction:column;gap:0;border-top:1px solid var(--line);}

  /* 各記事 = details要素 */
  .news-item{border-bottom:1px solid var(--line);}
  .news-item summary{
    list-style:none;cursor:pointer;
    display:grid;grid-template-columns:140px 100px 1fr auto;gap:30px;
    padding:30px 0;align-items:start;
    transition:padding-left .2s;
  }
  .news-item summary::-webkit-details-marker{display:none;}
  .news-item:hover summary{padding-left:14px;}
  .news-item .date{font-family:"JetBrains Mono",monospace;font-size:13px;color:var(--mute);letter-spacing:.1em;padding-top:6px;}
  .news-item .tag{font-family:"JetBrains Mono",monospace;font-size:9px;letter-spacing:.2em;padding:5px 10px;color:var(--bg);background:var(--ink);justify-self:start;text-transform:uppercase;height:24px;display:inline-flex;align-items:center;}
  .news-item .tag.update{background:var(--accent);color:var(--bg);}
  .news-item .tag.release{background:var(--accent-2);color:var(--bg);}
  .news-item .tag.event{background:var(--warn);color:#fff;}
  .news-item .tag.notice{background:var(--ink);color:var(--bg);}
  .news-item .title{font-family:"Shippori Mincho",serif;font-size:22px;line-height:1.5;font-weight:700;color:var(--ink);padding-top:0px;}
  .news-item .toggle{font-family:"JetBrains Mono",monospace;font-size:24px;color:var(--mute);transition:transform .3s;line-height:1;padding-top:4px;font-weight:300;}
  .news-item[open] .toggle{transform:rotate(45deg);color:var(--accent);}

  .news-item .body{
    padding:0 0 36px 270px;
    font-family:"Shippori Mincho",serif;font-size:17px;line-height:2;color:var(--ink-2);
    max-width:880px;
  }
  .news-item .body p{margin-bottom:18px;}
  .news-item .body p:last-child{margin-bottom:0;}
  .news-item .body strong{color:var(--accent);font-weight:700;}
  .news-item .body a{color:var(--accent);border-bottom:1px solid var(--accent);}
  .news-item .body a:hover{color:var(--ink);border-bottom-color:var(--ink);}

  /* 空表示用 */
  .news-empty{padding:80px 0;text-align:center;color:var(--mute);font-family:"Shippori Mincho",serif;font-size:18px;}

  /* CTA */
  .cta-section{background:var(--ink);color:#fff;padding:80px 36px;position:relative;z-index:2;}
  .cta-wrap{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;max-width:1200px;}
  .cta-head{font-family:"Shippori Mincho",serif;font-size:clamp(32px,4vw,52px);line-height:1.1;letter-spacing:-.02em;}
  .cta-head .acc{color:var(--accent);}
  .cta-right .label{font-family:"JetBrains Mono",monospace;font-size:10px;color:var(--accent);letter-spacing:.25em;margin-bottom:14px;display:block;}
  .cta-right p{font-size:14px;line-height:1.9;color:rgba(255,255,255,.8);margin-bottom:24px;}
  .cta-btn{display:inline-flex;align-items:center;gap:14px;padding:16px 24px;background:var(--accent);color:var(--ink);font-family:"JetBrains Mono",monospace;font-size:12px;letter-spacing:.2em;font-weight:600;transition:transform .3s;}
  .cta-btn:hover{transform:translateX(6px);}
  .cta-btn::after{content:"→";}

  /* フッター */
  footer{background:var(--ink);color:rgba(255,255,255,.85);padding:80px 36px 30px;border-top:1px solid rgba(255,255,255,.1);position:relative;z-index:2;}
  .foot-top{display:grid;grid-template-columns:auto 1fr;gap:80px;align-items:start;padding-bottom:50px;border-bottom:1px solid rgba(255,255,255,.12);}
  .foot-voxel{display:flex;align-items:center;justify-content:center;padding:10px;}
  .foot-voxel svg{width:130px;height:auto;display:block;}
  .foot-info{display:grid;grid-template-columns:repeat(3,1fr);gap:40px;}
  .foot-info .col h5{font-family:"JetBrains Mono",monospace;font-size:10px;color:var(--accent);letter-spacing:.25em;margin-bottom:18px;}
  .foot-info .col .item{font-family:"Shippori Mincho",serif;font-size:16px;color:#fff;margin-bottom:8px;line-height:1.4;}
  .foot-info .col .sub{font-family:"JetBrains Mono",monospace;font-size:10px;color:rgba(255,255,255,.45);letter-spacing:.1em;}
  .foot-info .nav-links a{display:block;font-family:"Zen Kaku Gothic New",sans-serif;font-size:13px;color:rgba(255,255,255,.7);margin-bottom:10px;transition:color .2s;}
  .foot-info .nav-links a:hover{color:var(--accent);}
  .foot-bottom{padding-top:24px;display:flex;justify-content:space-between;align-items:center;font-family:"JetBrains Mono",monospace;font-size:10px;color:rgba(255,255,255,.4);letter-spacing:.2em;}
  .foot-bottom .tagline{color:var(--accent);}

  @media (max-width:900px){
    header{padding:16px 20px;grid-template-columns:1fr auto;}
    nav,.meta-right{display:none;}
    .hero{padding:90px 20px 40px;}
    .hero-grid{grid-template-columns:1fr;gap:30px;}
    .hero-vlabel{display:none;}
    .hero-side{padding-left:0;border-left:none;border-top:1px solid var(--line);padding-top:30px;}
    .news-section{padding:50px 20px 70px;}
    .news-section .sec-meta{flex-direction:column;align-items:flex-start;gap:14px;}
    .news-item summary{grid-template-columns:1fr auto;gap:8px;padding:24px 0;}
    .news-item .date{grid-column:1/2;padding-top:0;}
    .news-item .tag{grid-column:1/2;}
    .news-item .title{grid-column:1/2;font-size:17px;}
    .news-item .toggle{grid-column:2/3;grid-row:1/4;align-self:start;}
    .news-item .body{padding:0 0 30px 0;font-size:15px;}
    .cta-section{padding:60px 20px;}
    .cta-wrap{grid-template-columns:1fr;gap:30px;}
    .foot-top{grid-template-columns:1fr;gap:40px;}
    .foot-info{grid-template-columns:1fr;gap:30px;}
    .foot-voxel svg{width:100px;}
    .foot-bottom{flex-direction:column;gap:10px;text-align:center;}
  }