/* TODO: hero-title サイズ微調整（PC幅で再確認） */

:root{
    --bg: #0b0f19;
    --panel: rgba(255,255,255,.06);
    --text: rgba(255,255,255,.92);
    --muted: rgba(255,255,255,.65);
    --line: rgba(255,255,255,.12);
    --shadow: 0 10px 30px rgba(0,0,0,.35);
    --radius: 16px;
    --max: 980px;
  }
  
  *{ box-sizing: border-box; }
  html{ scroll-behavior: smooth; }
  body{
    margin:0;
    font-family: ui-sans-serif, system-ui, -apple-system, "Hiragino Sans", "Noto Sans JP", Segoe UI, Roboto, Arial, sans-serif;
    color: var(--text);
    background: radial-gradient(1200px 600px at 20% 0%, rgba(128, 90, 213, .25), transparent 55%),
                radial-gradient(900px 500px at 80% 10%, rgba(16, 185, 129, .18), transparent 60%),
                var(--bg);
    line-height: 1.7;
  }
  
  a{ color: inherit; text-decoration: none; }
  a:hover{ text-decoration: underline; }
  
  .container{
    width: min(var(--max), calc(100% - 40px));
    margin: 0 auto;
  }
  
  .skip{
    position:absolute; left:-999px; top:auto; width:1px; height:1px; overflow:hidden;
  }
  .skip:focus{
    left:20px; top:20px; width:auto; height:auto; padding:10px 12px;
    background:#fff; color:#000; border-radius:10px;
  }
  
  .site-header{
    position: sticky;
    top: 0;
    z-index: 20;
    backdrop-filter: blur(12px);
    background: rgba(11,15,25,.55);
    border-bottom: 1px solid var(--line);
  }
  
  .header-inner{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    padding: 14px 0;
  }
  
  .brand{ display:flex; align-items:center; gap:12px; }
  .brand-mark{
    width: 38px; height: 38px;
    display:grid; place-items:center;
    border-radius: 12px;
    background: rgba(255,255,255,.10);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
    font-weight: 700;
  }
  .brand-name{ font-weight: 700; }
  .brand-sub{ font-size: 12px; color: var(--muted); margin-top: -2px; }
  
  .nav{
    display:flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: flex-end;
    font-size: 13px;
    color: var(--muted);
  }
  .nav a{
    padding: 6px 10px;
    border-radius: 999px;
    border: 1px solid transparent;
  }
  .nav a:hover{
    background: rgba(255,255,255,.06);
    border-color: var(--line);
    text-decoration: none;
  }
  
  .hero{ padding: 64px 0 28px; }
  .hero-title{
    font-size: clamp(24px, 3.6vw, 38px);
    line-height: 1.2;
    margin: 0 0 12px;
  }
  
  .hero-lead{
    margin: 0 0 18px;
    color: var(--muted);
    font-size: 16px;
  }
  
  .hero-chips{ display:flex; flex-wrap:wrap; gap:10px; }
  .chip{
    padding: 6px 10px;
    border-radius: 999px;
    background: rgba(255,255,255,.06);
    border: 1px solid var(--line);
    font-size: 12px;
    color: var(--muted);
  }
  
  .section{ padding: 36px 0; }
  .section-title{
    margin: 0 0 14px;
    font-size: 18px;
    letter-spacing: .02em;
  }
  
  .card{
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 18px 18px 14px;
  }
  .card-title{
    margin: 0 0 10px;
    font-size: 18px;
  }
  .card-block{
    padding: 12px 0;
    border-top: 1px solid var(--line);
  }
  .card-block:first-of-type{ border-top: 0; padding-top: 6px; }
  .card-subtitle{
    margin: 0 0 6px;
    font-size: 14px;
    color: rgba(255,255,255,.86);
  }
  .card-note{
    margin: 12px 0 0;
    padding-top: 12px;
    border-top: 1px solid var(--line);
    color: rgba(255,255,255,.82);
  }
  
  .bullets{ margin: 0; padding-left: 1.1em; color: var(--muted); }
  .bullets li{ margin: 8px 0; }
  .bullets.compact li{ margin: 6px 0; }
  
  .grid{
    display:grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
  }
  .mini{
    background: rgba(255,255,255,.05);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 14px;
  }
  .mini-title{ margin: 0 0 8px; font-size: 14px; }
  .mini-body{ margin: 0; color: var(--muted); }
  
  .steps{
    margin: 0;
    padding-left: 1.2em;
    color: var(--muted);
  }
  .steps li{ margin: 8px 0; }
  
  .contact-box{
    margin-top: 10px;
    padding: 12px 14px;
    border-radius: var(--radius);
    border: 1px dashed var(--line);
    background: rgba(255,255,255,.04);
  }
  .muted{ color: var(--muted); }
  
  .site-footer{
    border-top: 1px solid var(--line);
    padding: 18px 0;
    color: var(--muted);
  }
  .footer-inner{ display:flex; justify-content:center; }
  
  @media (max-width: 860px){
    .nav{ display:none; }
    .grid{ grid-template-columns: 1fr; }
    .hero{ padding-top: 44px; }
  }