:root{
    --bg:#0a0e14;--bg-2:#11161e;
    --ink:#e6e8ec;--ink-2:#a0a5b0;--mute:#5e6470;
    --line:rgba(255,255,255,.08);--line-2:rgba(255,255,255,.04);
    --accent:#00f08a;--accent-dim:#008a4a;
    --line-brand:#06c755;  /* LINEブランドカラー寄り */
    --cyan:#00d4ff;--magenta:#ff3ea0;
    --paper:#11161e;--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;}
  .crt{font-family:"VT323",monospace;}

  .grid-bg{position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.18;
    background-image:linear-gradient(to right,rgba(0,240,138,.15) 1px,transparent 1px),linear-gradient(to bottom,rgba(0,240,138,.15) 1px,transparent 1px);
    background-size:80px 80px;}
  .scan{position:fixed;inset:0;z-index:1;pointer-events:none;opacity:.04;
    background-image:linear-gradient(transparent 50%,#000 50%);background-size:100% 4px;}

  header{position:fixed;top:0;left:0;right:0;z-index:50;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;padding:18px 36px;backdrop-filter:saturate(1.2) blur(12px);background:rgba(10,14,20,.7);border-bottom:1px solid var(--line);}
  .logo{display:flex;align-items:center;color:var(--ink);}
  .logo svg{height:28px;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(--accent);transition:right .3s;}
  nav a:hover::after,nav a.current::after{right:0;}
  .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{position:relative;z-index:2;padding:140px 36px 100px;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:60px;letter-spacing:.15em;}
  .breadcrumb a:hover{color:var(--accent);}
  .breadcrumb .sep{color:var(--mute);opacity:.5;}
  .breadcrumb .current{color:var(--accent);}

  .hero-stack{display:grid;grid-template-columns:1fr 320px;gap:60px;align-items:start;}
  .codename{display:inline-flex;align-items:center;gap:10px;font-family:"JetBrains Mono",monospace;font-size:11px;letter-spacing:.3em;color:var(--accent);border:1px solid var(--accent);padding:6px 14px;border-radius:100px;margin-bottom:36px;background:rgba(0,240,138,.05);}
  .codename .blink{width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 8px var(--accent);animation:pulse 1.5s infinite;}
  .hero-title{font-family:"Shippori Mincho",serif;font-weight:800;font-size:clamp(48px,8vw,112px);line-height:.95;letter-spacing:-.03em;color:var(--ink);}
  .hero-title .en{display:block;font-family:"VT323",monospace;font-size:.32em;color:var(--accent);letter-spacing:.1em;margin-top:18px;font-weight:400;}
  .hero-lead{font-family:"Shippori Mincho",serif;font-size:22px;line-height:1.9;color:var(--ink-2);max-width:680px;margin-top:40px;}
  .hero-lead em{font-style:normal;color:var(--accent);font-weight:500;}

  /* スマホモックアップ */
  .phone-mock{background:#000;border:2px solid var(--accent);border-radius:36px;padding:14px;box-shadow:0 0 50px rgba(0,240,138,.2);position:sticky;top:120px;}
  .phone-mock::before{content:"";position:absolute;top:14px;left:50%;transform:translateX(-50%);width:50px;height:18px;background:#000;border-radius:0 0 14px 14px;z-index:2;}
  .phone-screen{background:#1a1a1a;border-radius:24px;padding:38px 16px 20px;min-height:520px;display:flex;flex-direction:column;gap:12px;position:relative;}
  .phone-header{display:flex;align-items:center;gap:10px;padding:10px 4px;border-bottom:1px solid rgba(255,255,255,.08);}
  .phone-header .avatar{width:32px;height:32px;border-radius:50%;background:var(--line-brand);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:14px;}
  .phone-header .name{font-size:13px;color:#fff;font-weight:500;}
  .phone-header .name .sub{font-size:10px;color:rgba(255,255,255,.4);display:block;}
  .chat-bubble{padding:10px 14px;border-radius:14px;font-size:12px;line-height:1.6;max-width:80%;}
  .chat-bubble.them{background:#fff;color:#1a1a1a;align-self:flex-start;border-bottom-left-radius:4px;}
  .chat-bubble.me{background:var(--line-brand);color:#fff;align-self:flex-end;border-bottom-right-radius:4px;}
  .chat-meta{font-size:9px;color:rgba(255,255,255,.4);text-align:center;margin:4px 0;}
  .liff-card{background:#fff;border-radius:10px;padding:12px;color:#1a1a1a;align-self:flex-start;max-width:90%;}
  .liff-card .head{font-size:9px;color:var(--line-brand);letter-spacing:.1em;margin-bottom:4px;font-family:"JetBrains Mono",monospace;}
  .liff-card .title{font-size:12px;font-weight:700;margin-bottom:4px;}
  .liff-card .body{font-size:11px;line-height:1.5;color:#555;}
  .liff-card .btn{margin-top:8px;background:var(--line-brand);color:#fff;padding:6px 12px;border-radius:6px;font-size:10px;text-align:center;font-weight:600;}

  section{position:relative;z-index:2;padding:120px 36px;}
  section + section{border-top:1px solid var(--line);}
  .sec-head{display:grid;grid-template-columns:80px 1fr auto;gap:36px;align-items:end;margin-bottom:60px;}
  .sec-num{writing-mode:vertical-rl;font-family:"JetBrains Mono",monospace;font-size:11px;color:var(--accent);height:160px;letter-spacing:.2em;}
  .sec-title{font-family:"Shippori Mincho",serif;font-weight:800;font-size:clamp(36px,5vw,68px);line-height:1;letter-spacing:-.02em;color:var(--ink);}
  .sec-title .en{display:block;font-family:"VT323",monospace;font-size:16px;font-weight:400;letter-spacing:.15em;color:var(--accent);margin-bottom:16px;}
  .sec-meta{font-family:"JetBrains Mono",monospace;font-size:11px;color:var(--mute);letter-spacing:.2em;text-align:right;}

  /* WHY LINE */
  .why-wrap{display:grid;grid-template-columns:1fr 1fr;gap:80px;}
  .why-body{font-family:"Shippori Mincho",serif;font-size:22px;line-height:2;color:var(--ink);}
  .why-body p{margin-bottom:32px;}
  .why-body strong{color:var(--accent);font-weight:500;}
  .stats{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
  .stat-card{background:var(--paper);border:1px solid var(--line);padding:30px;transition:border-color .3s;}
  .stat-card:hover{border-color:var(--accent);}
  .stat-card .num{font-family:"VT323",monospace;font-size:54px;color:var(--accent);line-height:1;}
  .stat-card .num small{font-family:"Zen Kaku Gothic New",sans-serif;font-size:14px;color:var(--ink-2);margin-left:6px;letter-spacing:.05em;}
  .stat-card .label{font-family:"JetBrains Mono",monospace;font-size:10px;color:var(--accent);letter-spacing:.25em;margin-top:8px;}
  .stat-card .desc{font-size:12px;line-height:1.7;color:var(--ink-2);margin-top:12px;}

  /* FEATURES（プロダクトラインアップ） */
  .features-section{background:linear-gradient(180deg,var(--bg),var(--bg-2));}
  .features{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
  .feat-card{background:var(--paper);border:1px solid var(--line);padding:36px 30px;transition:all .3s;position:relative;overflow:hidden;}
  .feat-card::before{content:"";position:absolute;top:0;left:0;width:40px;height:2px;background:var(--accent);}
  .feat-card:hover{border-color:var(--accent);transform:translateY(-4px);}
  .feat-card .label{font-family:"JetBrains Mono",monospace;font-size:10px;color:var(--accent);letter-spacing:.25em;margin-bottom:14px;}
  .feat-card h3{font-family:"Shippori Mincho",serif;font-size:24px;line-height:1.4;color:var(--ink);margin-bottom:14px;}
  .feat-card p{font-size:13px;line-height:1.9;color:var(--ink-2);}
  .feat-card .tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:18px;padding-top:18px;border-top:1px dashed var(--line);}
  .feat-card .tags span{font-family:"JetBrains Mono",monospace;font-size:10px;padding:3px 8px;background:rgba(0,240,138,.08);color:var(--accent);}

  /* CHAT FLOW */
  .flow-section{background:#000;border-top:1px solid var(--accent);border-bottom:1px solid var(--accent);}
  .chat-flow{max-width:560px;margin:0 auto;}
  .chat-flow-card{background:#1a1a1a;border:1px solid rgba(255,255,255,.08);border-radius:14px;padding:20px;margin-bottom:14px;display:flex;gap:14px;align-items:flex-start;}
  .chat-flow-card.bot{border-color:var(--line-brand);}
  .chat-flow-card.user{flex-direction:row-reverse;border-color:var(--accent);}
  .chat-flow-card .ico{flex-shrink:0;width:40px;height:40px;border-radius:50%;background:var(--line-brand);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;}
  .chat-flow-card.user .ico{background:var(--accent);color:#000;}
  .chat-flow-card .content{flex:1;}
  .chat-flow-card .role{font-family:"JetBrains Mono",monospace;font-size:9px;letter-spacing:.2em;color:var(--mute);margin-bottom:4px;}
  .chat-flow-card .text{font-size:13px;line-height:1.7;color:var(--ink);}
  .chat-flow-card .text strong{color:var(--accent);font-weight:500;}
  .chat-flow-step{font-family:"JetBrains Mono",monospace;font-size:10px;color:var(--accent);letter-spacing:.25em;text-align:center;margin:10px 0;opacity:.5;}

  /* TECH STACK */
  .stack-section{background:var(--bg-2);}
  .stack{display:grid;grid-template-columns:repeat(2,1fr);gap:0;border:1px solid var(--line);}
  .stack-item{padding:28px 30px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);display:grid;grid-template-columns:120px 1fr;gap:24px;align-items:start;}
  .stack-item:nth-child(2n){border-right:none;}
  .stack-item:nth-last-child(-n+2){border-bottom:none;}
  .stack-item .role{font-family:"JetBrains Mono",monospace;font-size:10px;color:var(--accent);letter-spacing:.25em;line-height:1.6;}
  .stack-item h4{font-family:"Shippori Mincho",serif;font-size:18px;color:var(--ink);margin-bottom:6px;}
  .stack-item .desc{font-family:"JetBrains Mono",monospace;font-size:11px;color:var(--ink-2);line-height:1.7;}

  /* USE CASES */
  .usecase{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
  .uc-card{background:var(--paper);border:1px solid var(--line);padding:32px 28px;}
  .uc-card .industry{font-family:"JetBrains Mono",monospace;font-size:10px;color:var(--accent);letter-spacing:.25em;margin-bottom:14px;}
  .uc-card h3{font-family:"Shippori Mincho",serif;font-size:22px;line-height:1.4;color:var(--ink);margin-bottom:14px;}
  .uc-card p{font-size:13px;line-height:1.9;color:var(--ink-2);}
  .uc-card p strong{color:var(--ink);}

  /* DEVLOG */
  .devlog{display:flex;flex-direction:column;border-top:1px solid var(--line);}
  .devlog-item{display:grid;grid-template-columns:160px 100px 1fr;gap:30px;padding:24px 0;border-bottom:1px solid var(--line);align-items:start;}
  .devlog-item .date{font-family:"JetBrains Mono",monospace;font-size:12px;color:var(--mute);letter-spacing:.1em;padding-top:2px;}
  .devlog-item .tag{font-family:"JetBrains Mono",monospace;font-size:9px;letter-spacing:.2em;padding:3px 8px;color:var(--bg);background:var(--accent);justify-self:start;}
  .devlog-item .tag.warn{background:var(--cyan);}
  .devlog-item .tag.idea{background:var(--magenta);}
  .devlog-item .entry{font-size:14px;line-height:1.9;color:var(--ink);}
  .devlog-item .entry strong{color:var(--accent);font-weight:500;}

  /* CTA */
  .cta-section{background:var(--bg);text-align:left;border-top:none;}
  .cta-section .sec-head{margin-bottom:60px;}
  .cta-glow{padding:60px;border:1px solid var(--accent);background:radial-gradient(ellipse at center,rgba(0,240,138,.08),transparent 70%);position:relative;}
  .cta-glow::before,.cta-glow::after{content:"";position:absolute;width:30px;height:30px;border:2px solid var(--accent);}
  .cta-glow::before{top:-2px;left:-2px;border-right:none;border-bottom:none;}
  .cta-glow::after{bottom:-2px;right:-2px;border-left:none;border-top:none;}
  .cta-wrap{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;}
  .cta-head{font-family:"Shippori Mincho",serif;font-size:clamp(36px,5vw,64px);line-height:1.1;letter-spacing:-.02em;color:var(--ink);}
  .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:var(--ink-2);margin-bottom:30px;}
  .cta-btn{display:inline-flex;align-items:center;gap:14px;padding:18px 28px;background:var(--accent);color:var(--bg);font-family:"JetBrains Mono",monospace;font-size:13px;letter-spacing:.2em;font-weight:600;transition:all .3s;box-shadow:0 0 30px rgba(0,240,138,.4);}
  .cta-btn:hover{transform:translateX(6px);box-shadow:0 0 50px rgba(0,240,138,.6);}
  .cta-btn::after{content:"→";}
  .back-link{margin-top:30px;display:inline-flex;align-items:center;gap:10px;font-family:"JetBrains Mono",monospace;font-size:11px;color:var(--mute);letter-spacing:.2em;}
  .back-link:hover{color:var(--accent);}

  footer{background:#000;color:rgba(255,255,255,.85);padding:80px 36px 30px;border-top:1px solid var(--line);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;}
  .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:14px 18px;grid-template-columns:1fr auto;}
    nav,.meta-right{display:none;}
    .hero{padding:90px 20px 50px;}
    .hero-stack{grid-template-columns:1fr;gap:40px;}
    .phone-mock{position:static;max-width:280px;margin:0 auto;}
    section{padding:70px 20px;}
    .sec-head{grid-template-columns:1fr;gap:14px;margin-bottom:40px;}
    .sec-num{writing-mode:horizontal-tb;height:auto;}
    .sec-meta{text-align:left;}
    .why-wrap,.features,.stack,.usecase,.cta-wrap,.stats{grid-template-columns:1fr;}
    .stack-item{border-right:none;}
    .devlog-item{grid-template-columns:1fr;gap:8px;}
    .cta-glow{padding: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;}
  }