:root{
    --brand:#409DED;
    --brand-dark:#1E6FBE;
    --brand-light:#E8F3FE;
    --line:#06C755;
    --accent:#FF7A59;
    --ink:#1F2A37;
    --ink-2:#475467;
    --muted:#6B7280;
    --bg:#F7FAFE;
    --card:#FFFFFF;
    --border:#E5EEF8;
    --shadow:0 10px 30px rgba(28, 89, 158, .08);
    --shadow-lg:0 20px 50px rgba(28, 89, 158, .15);
    --radius:18px;
  }
  *{box-sizing:border-box}
  html,body{margin:0;padding:0}
  body{
    font-family:"Helvetica Neue","Hiragino Kaku Gothic ProN","Hiragino Sans","Yu Gothic UI","Meiryo",sans-serif;
    color:var(--ink);
    background:var(--bg);
    line-height:1.75;
    -webkit-font-smoothing:antialiased;
  }
  a{color:var(--brand-dark);text-decoration:none}
  img,svg{max-width:100%;display:block}

  /* ===== Header ===== */
  header.site{
    position:sticky;top:0;z-index:50;
    backdrop-filter:saturate(180%) blur(10px);
    background:rgba(255,255,255,.85);
    border-bottom:1px solid var(--border);
  }
  .nav{
    max-width:1180px;margin:0 auto;
    display:flex;align-items:center;justify-content:space-between;
    padding:14px 24px;
  }
  .logo{
    display:flex;align-items:center;gap:10px;
  }
  .logo img{height:36px;width:auto;display:block}
  .nav ul{display:flex;gap:24px;list-style:none;margin:0;padding:0}
  .nav a.link{color:var(--ink-2);font-weight:600;font-size:14px}
  .nav a.link:hover{color:var(--brand-dark)}
  .cta-btn{
    display:inline-block;background:var(--brand);color:#fff !important;
    padding:10px 18px;border-radius:999px;font-weight:700;font-size:14px;
    box-shadow:0 6px 16px rgba(64,157,237,.35);transition:transform .2s, box-shadow .2s;
  }
  .cta-btn:hover{transform:translateY(-2px);box-shadow:0 10px 22px rgba(64,157,237,.45)}
  @media(max-width:880px){.nav ul{display:none}}

  /* ===== Hero ===== */
  .hero{
    position:relative;overflow:hidden;
    background:
      radial-gradient(1200px 600px at 80% -10%, rgba(64,157,237,.18), transparent 60%),
      radial-gradient(900px 500px at 0% 100%, rgba(6,199,85,.15), transparent 60%),
      linear-gradient(180deg,#fff,#F7FAFE);
  }
  .hero-inner{
    max-width:1180px;margin:0 auto;padding:80px 24px 60px;
    display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;
  }
  .badge{
    display:inline-flex;align-items:center;gap:8px;
    background:var(--brand-light);color:var(--brand-dark);
    padding:6px 14px;border-radius:999px;font-weight:700;font-size:13px;
    border:1px solid #CDE3F8;
  }
  .badge .pulse{
    width:8px;height:8px;border-radius:50%;background:var(--line);
    box-shadow:0 0 0 0 rgba(6,199,85,.6);animation:pulse 1.8s infinite;
  }
  @keyframes pulse{
    0%{box-shadow:0 0 0 0 rgba(6,199,85,.55)}
    70%{box-shadow:0 0 0 12px rgba(6,199,85,0)}
    100%{box-shadow:0 0 0 0 rgba(6,199,85,0)}
  }
  h1.hero-title{
    font-size:46px;line-height:1.25;margin:18px 0 14px;
    letter-spacing:-.01em;font-weight:900;
  }
  h1.hero-title .grad{
    background:linear-gradient(90deg,var(--brand),var(--line));
    -webkit-background-clip:text;background-clip:text;color:transparent;
  }
  .hero-lead{font-size:18px;color:var(--ink-2);margin:0 0 28px;max-width:560px}
  .hero-ctas{display:flex;gap:14px;flex-wrap:wrap}
  .btn-primary{
    background:var(--brand);color:#fff;padding:14px 24px;border-radius:12px;
    font-weight:800;font-size:15px;box-shadow:0 10px 24px rgba(64,157,237,.35);
    transition:transform .2s, box-shadow .2s;display:inline-flex;align-items:center;gap:8px;
  }
  .btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(64,157,237,.45);color:#fff !important}
  .btn-ghost{
    background:#fff;color:var(--brand-dark);padding:14px 24px;border-radius:12px;
    font-weight:800;font-size:15px;border:1px solid var(--border);
    transition:background .2s;
  }
  .btn-ghost:hover{background:var(--brand-light)}

  .hero-art{
    position:relative;border-radius:24px;
    background:linear-gradient(135deg,#fff,#F2F8FF);
    border:1px solid var(--border);box-shadow:var(--shadow-lg);
    padding:24px;
  }
  @media(max-width:980px){
    .hero-inner{grid-template-columns:1fr;padding-top:56px}
    h1.hero-title{font-size:34px}
  }

  /* ===== Section ===== */
  section{padding:90px 24px}
  .container{max-width:1180px;margin:0 auto}
  .section-head{text-align:center;margin-bottom:56px}
  .eyebrow{
    display:inline-block;color:var(--brand-dark);background:var(--brand-light);
    padding:6px 14px;border-radius:999px;font-weight:800;font-size:12px;letter-spacing:.12em;
  }
  h2.section-title{
    font-size:34px;line-height:1.35;margin:14px 0 10px;font-weight:900;letter-spacing:-.01em;
  }
  .section-lead{color:var(--ink-2);font-size:16px;max-width:760px;margin:0 auto}

  /* ===== Models ===== */
  .models-grid{
    display:grid;grid-template-columns:repeat(5,1fr);gap:14px;margin-top:8px;
  }
  .model-card{
    background:#fff;border:1px solid var(--border);border-radius:16px;padding:22px;
    text-align:center;transition:transform .25s, box-shadow .25s, border-color .25s;
  }
  .model-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#CDE3F8}
  .model-icon{
    width:54px;height:54px;border-radius:14px;margin:0 auto 12px;
    display:flex;align-items:center;justify-content:center;color:#fff;font-weight:900;font-size:18px;
    box-shadow:var(--shadow);
  }
  .model-name{font-weight:800;font-size:16px;margin:6px 0 4px}
  .model-vendor{color:var(--muted);font-size:13px}
  .model-card.custom{
    background:linear-gradient(135deg,#fff,#F2F8FF);
    border:1.5px dashed var(--brand);position:relative;
  }
  .model-card.custom .model-icon{
    background:linear-gradient(135deg,var(--brand),var(--line));
  }
  .model-card.custom::after{
    content:"+API";position:absolute;top:10px;right:10px;
    background:var(--brand);color:#fff;font-size:10px;font-weight:900;
    padding:2px 8px;border-radius:999px;letter-spacing:.05em;
  }
  @media(max-width:880px){.models-grid{grid-template-columns:repeat(2,1fr)}}
  @media(max-width:420px){.models-grid{grid-template-columns:1fr}}

  .custom-note{
    margin-top:28px;background:linear-gradient(135deg,#fff,var(--brand-light));
    border:1px solid #CDE3F8;border-radius:18px;padding:22px 26px;
    display:flex;align-items:flex-start;gap:16px;box-shadow:var(--shadow);
  }
  .custom-note__ico{
    flex:none;width:48px;height:48px;border-radius:14px;background:#fff;
    display:flex;align-items:center;justify-content:center;
    box-shadow:0 4px 10px rgba(64,157,237,.18);
  }
  .custom-note__title{font-weight:900;font-size:17px;margin-bottom:6px;color:var(--ink)}
  .custom-note__title .hl{
    background:linear-gradient(transparent 65%, rgba(64,157,237,.3) 65%);padding:0 4px;
  }
  .custom-note__body{color:var(--ink-2);font-size:14px;line-height:1.7}
  @media(max-width:600px){
    .custom-note{padding:18px;flex-direction:column;gap:10px}
    .custom-note__title{font-size:15px}
    .custom-note__body{font-size:13px}
  }

  /* ===== Before / After ===== */
  .ba-grid{
    display:grid;grid-template-columns:1fr 80px 1fr;gap:20px;align-items:stretch;
  }
  .ba-card{
    background:#fff;border:1px solid var(--border);border-radius:20px;padding:28px;
    box-shadow:var(--shadow);display:flex;flex-direction:column;
  }
  .ba-head{margin-bottom:16px}
  .ba-head h3{margin:8px 0 0;font-size:20px;font-weight:900}
  .ba-tag{
    display:inline-block;font-size:11px;font-weight:900;letter-spacing:.12em;
    padding:4px 12px;border-radius:999px;
  }
  .ba-tag--gray{background:#EEF2F7;color:#6B7280}
  .ba-tag--brand{background:linear-gradient(90deg,var(--brand),var(--line));color:#fff}
  .ba-list{list-style:none;margin:0;padding:0;display:grid;gap:12px}
  .ba-list li{
    display:flex;align-items:flex-start;gap:10px;font-size:14.5px;line-height:1.65;color:var(--ink);
  }
  .ba-x,.ba-o{
    flex:none;width:22px;height:22px;border-radius:50%;display:inline-flex;
    align-items:center;justify-content:center;font-weight:900;font-size:12px;margin-top:3px;
  }
  .ba-x{background:#FEE2E2;color:#B91C1C}
  .ba-o{background:#DCFCE7;color:#15803D}
  .ba-list li{flex-wrap:wrap}
  .ba-time{
    display:inline-block;font-size:11px;font-weight:900;letter-spacing:.04em;
    background:#FEE2E2;color:#B91C1C;padding:3px 9px;border-radius:999px;
    margin-left:auto;white-space:nowrap;
  }
  .ba-time--win{background:#DCFCE7;color:#15803D}
  .ba-before{background:linear-gradient(180deg,#fff,#FBFBFB);opacity:.92}
  .ba-after{
    background:linear-gradient(160deg,#fff,#F0FAFF);
    border:1.5px solid var(--brand);
    position:relative;
  }
  .ba-after::before{
    content:"おすすめ";position:absolute;top:-12px;left:24px;
    background:var(--accent);color:#fff;font-size:11px;font-weight:900;letter-spacing:.05em;
    padding:4px 12px;border-radius:999px;
  }
  .ba-arrow{
    display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;
  }
  .ba-arrow svg{width:50px;height:34px}
  .ba-arrow span{
    font-size:11px;font-weight:900;color:var(--brand-dark);letter-spacing:.08em;
    background:var(--brand-light);padding:3px 10px;border-radius:999px;
  }
  @media(max-width:880px){
    .ba-grid{grid-template-columns:1fr;gap:14px}
    .ba-arrow{flex-direction:row;padding:4px 0}
    .ba-arrow svg{transform:rotate(90deg);width:34px;height:50px}
    .ba-card{padding:22px}
  }

  /* ===== Hero Highlights ===== */
  .hero-highlights{
    display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;
  }
  .hero-highlights .hi{
    background:#fff;border:1px solid var(--border);border-radius:999px;
    padding:8px 16px;font-size:13px;display:inline-flex;align-items:center;gap:8px;
    box-shadow:0 4px 10px rgba(28,89,158,.06);font-weight:600;color:var(--ink);
  }
  .hero-highlights .hi strong{color:var(--brand-dark);font-weight:900}
  .hero-highlights .hi svg{flex:none}

  /* ===== Value Strip ===== */
  .value-strip{
    background:linear-gradient(135deg,var(--brand) 0%, #2C7DD4 60%, var(--line) 130%);
    padding:50px 24px;color:#fff;position:relative;overflow:hidden;
  }
  .value-strip::before{
    content:"";position:absolute;inset:0;
    background:
      radial-gradient(600px 300px at 10% 10%, rgba(255,255,255,.18), transparent 60%),
      radial-gradient(500px 250px at 90% 90%, rgba(255,255,255,.12), transparent 60%);
    pointer-events:none;
  }
  .value-strip .container{position:relative}
  .value-title{
    text-align:center;font-size:14px;font-weight:900;letter-spacing:.18em;
    margin:0 0 24px;color:rgba(255,255,255,.85);
  }
  .value-grid{
    display:grid;grid-template-columns:repeat(3,1fr);gap:18px;
  }
  .value-item{
    text-align:center;padding:18px 14px;border-radius:18px;
    background:rgba(255,255,255,.1);backdrop-filter:blur(8px);
    border:1px solid rgba(255,255,255,.22);
    transition:transform .3s, background .3s;
  }
  .value-item:hover{transform:translateY(-4px);background:rgba(255,255,255,.16)}
  .value-num{
    font-size:54px;font-weight:900;line-height:1;letter-spacing:-.02em;
    display:inline-flex;align-items:baseline;
  }
  .value-num .u{font-size:22px;margin-left:4px;font-weight:800;opacity:.95}
  .value-label{font-weight:900;font-size:15px;margin-top:8px}
  .value-sub{font-size:12px;opacity:.85;margin-top:4px;line-height:1.6}
  @media(max-width:880px){
    .value-strip{padding:36px 16px}
    .value-grid{grid-template-columns:repeat(1,1fr);gap:12px}
    .value-num{font-size:42px}
    .value-num .u{font-size:18px}
    .value-label{font-size:13px}
    .value-sub{font-size:11px}
  }

  /* ===== Pain Points ===== */
  .pain-grid{
    display:grid;grid-template-columns:repeat(2,1fr);gap:18px;
  }
  .pain-card{
    background:#fff;border:1px solid var(--border);border-radius:18px;padding:24px;
    display:flex;gap:16px;align-items:flex-start;
    transition:transform .25s, box-shadow .25s;position:relative;overflow:hidden;
  }
  .pain-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
  .pain-emoji{
    flex:none;width:56px;height:56px;border-radius:14px;
    background:#FFF2EC;display:flex;align-items:center;justify-content:center;
    font-size:30px;
  }
  .pain-body{flex:1}
  .pain-body h4{
    margin:0 0 6px;font-size:16px;font-weight:900;color:var(--ink);
  }
  .pain-body p{margin:0 0 12px;color:var(--ink-2);font-size:14px;line-height:1.7}
  .pain-solution{
    background:linear-gradient(90deg,var(--brand-light), #fff);
    border-left:3px solid var(--brand);border-radius:0 10px 10px 0;
    padding:10px 14px;font-size:13.5px;color:var(--ink);display:flex;gap:8px;align-items:flex-start;
  }
  .pain-solution .ps-tag{
    background:var(--brand);color:#fff;font-size:10px;font-weight:900;
    padding:2px 8px;border-radius:999px;letter-spacing:.05em;flex:none;margin-top:2px;
  }
  .pain-solution strong{color:var(--brand-dark)}
  @media(max-width:880px){
    .pain-grid{grid-template-columns:1fr;gap:14px}
    .pain-card{padding:20px;gap:14px}
    .pain-emoji{width:48px;height:48px;font-size:26px}
  }

  /* ===== Use Cases ===== */
  .usecase-grid{
    display:grid;grid-template-columns:repeat(4,1fr);gap:16px;
  }
  .usecase{
    background:#fff;border:1px solid var(--border);border-radius:18px;padding:24px;
    transition:transform .25s, box-shadow .25s, border-color .25s;
    position:relative;overflow:hidden;
  }
  .usecase::after{
    content:"";position:absolute;right:-30px;top:-30px;width:90px;height:90px;
    background:radial-gradient(circle, rgba(64,157,237,.12), transparent 70%);
    border-radius:50%;
  }
  .usecase:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:#CDE3F8}
  .usecase__emoji{
    font-size:32px;width:56px;height:56px;border-radius:14px;
    background:var(--brand-light);display:flex;align-items:center;justify-content:center;
    margin-bottom:14px;
  }
  .usecase__name{font-weight:900;font-size:17px;margin-bottom:8px;color:var(--ink)}
  .usecase p{margin:0;color:var(--ink-2);font-size:14px;line-height:1.75}
  @media(max-width:880px){.usecase-grid{grid-template-columns:repeat(2,1fr);gap:14px}}
  @media(max-width:560px){.usecase-grid{grid-template-columns:1fr}}

  /* ===== Architecture ===== */
  .arch-wrap{
    background:#fff;border:1px solid var(--border);border-radius:24px;
    padding:30px;box-shadow:var(--shadow);
  }
  .arch-caption{
    display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:22px;
  }
  .arch-step{
    background:var(--bg);border-radius:14px;padding:18px;border:1px solid var(--border);
  }
  .arch-step .num{
    width:30px;height:30px;border-radius:50%;background:var(--brand);color:#fff;
    display:inline-flex;align-items:center;justify-content:center;font-weight:800;font-size:14px;
    margin-bottom:8px;
  }
  .arch-step h4{margin:4px 0 4px;font-size:16px}
  .arch-step p{margin:0;color:var(--ink-2);font-size:14px}
  @media(max-width:880px){.arch-caption{grid-template-columns:1fr}}

  /* ===== Features ===== */
  .features{
    display:grid;grid-template-columns:repeat(2,1fr);gap:24px;
  }
  .feature{
    background:#fff;border:1px solid var(--border);border-radius:20px;
    padding:30px;position:relative;overflow:hidden;
    transition:transform .25s, box-shadow .25s;
  }
  .feature::before{
    content:"";position:absolute;inset:0 0 auto 0;height:6px;
    background:linear-gradient(90deg,var(--brand),var(--line));
  }
  .feature:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
  .feature .row{display:flex;align-items:center;gap:14px;margin-bottom:10px}
  .feature .ico{
    width:52px;height:52px;border-radius:14px;
    background:linear-gradient(135deg,var(--brand-light),#fff);
    border:1px solid #CDE3F8;
    display:flex;align-items:center;justify-content:center;color:var(--brand-dark);
  }
  .feature .num-tag{
    background:var(--brand);color:#fff;padding:3px 10px;border-radius:999px;
    font-size:12px;font-weight:800;letter-spacing:.05em;
  }
  .feature h3{margin:6px 0 8px;font-size:20px;font-weight:900}
  .feature p{margin:0 0 14px;color:var(--ink-2);font-size:15px}
  .feature ul.bullets{
    margin:0;padding:0;list-style:none;display:grid;gap:8px;
  }
  .feature ul.bullets li{
    display:flex;align-items:flex-start;gap:10px;color:var(--ink);font-size:14px;
  }
  .feature ul.bullets li::before{
    content:"";flex:none;width:8px;height:8px;border-radius:50%;
    background:var(--line);margin-top:9px;box-shadow:0 0 0 3px rgba(6,199,85,.18);
  }
  @media(max-width:880px){.features{grid-template-columns:1fr}}

  /* ===== Benefits ===== */
  .benefits-section{background:linear-gradient(180deg,#fff,#F2F8FF)}
  .benefits{
    display:grid;grid-template-columns:repeat(3,1fr);gap:20px;
  }
  .benefit{
    background:#fff;border-radius:18px;padding:26px;border:1px solid var(--border);
    text-align:center;box-shadow:var(--shadow);
  }
  .benefit .stat{
    font-size:40px;font-weight:900;
    background:linear-gradient(90deg,var(--brand),var(--line));
    -webkit-background-clip:text;background-clip:text;color:transparent;
    line-height:1;margin-bottom:6px;
  }
  .benefit h4{margin:8px 0 6px;font-size:16px}
  .benefit p{margin:0;color:var(--ink-2);font-size:14px}
  @media(max-width:880px){.benefits{grid-template-columns:1fr}}

  /* ===== CTA ===== */
  .cta-section{
    background:linear-gradient(135deg,var(--brand) 0%, var(--brand-dark) 100%);
    color:#fff;border-radius:0;
  }
  .cta-section .container{text-align:center}
  .cta-section h2{color:#fff;font-size:32px;font-weight:900;margin:0 0 12px}
  .cta-section p{color:rgba(255,255,255,.92);margin:0 0 24px;font-size:17px}
  .cta-section .btn-primary{background:#fff;color:var(--brand-dark)}
  .cta-section .btn-primary:hover{color:var(--brand-dark) !important}
  .cta-section .btn-ghost{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.5)}
  .cta-section .btn-ghost:hover{background:rgba(255,255,255,.12)}

  /* ===== Footer ===== */
  footer{
    background:#0F2438;color:#A9BBD0;padding:32px 24px;
    font-size:13px;
  }
  footer .container{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px}
  footer a{color:#cfe0f4}

  /* ===== Dynamic / Animation ===== */
  @media (prefers-reduced-motion: no-preference){
    .reveal{opacity:0;transform:translateY(24px);transition:opacity .8s ease, transform .8s ease}
    .reveal.in{opacity:1;transform:translateY(0)}
    .reveal.delay-1{transition-delay:.1s}
    .reveal.delay-2{transition-delay:.2s}
    .reveal.delay-3{transition-delay:.3s}
    .reveal.delay-4{transition-delay:.4s}

    @keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
    .floaty{animation:floaty 5s ease-in-out infinite}
    .floaty-slow{animation:floaty 7s ease-in-out infinite}

    @keyframes dash{to{stroke-dashoffset:0}}
    .anim-path{stroke-dasharray:600;stroke-dashoffset:600}
    .anim-path.run{animation:dash 2s ease-out forwards}

    @keyframes flow{from{stroke-dashoffset:0}to{stroke-dashoffset:-40}}
    .flow-line{stroke-dasharray:6 8;animation:flow 1.5s linear infinite}

    @keyframes blink{0%,100%{opacity:1}50%{opacity:.35}}
    .blink{animation:blink 1.4s ease-in-out infinite}

    @keyframes orbit{from{transform:rotate(0deg) translateX(0)}to{transform:rotate(360deg) translateX(0)}}
    @keyframes ringPulse{
      0%{box-shadow:0 0 0 0 rgba(64,157,237,.55)}
      70%{box-shadow:0 0 0 16px rgba(64,157,237,0)}
      100%{box-shadow:0 0 0 0 rgba(64,157,237,0)}
    }
  }

  /* ===== Hero AI chips orbiting ===== */
  .ai-stage{
    position:relative;height:420px;display:flex;align-items:center;justify-content:center;
  }
  .hub{
    width:150px;height:150px;border-radius:50%;
    background:linear-gradient(135deg,var(--brand),var(--brand-dark));
    color:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;
    text-align:center;font-weight:900;font-size:13px;line-height:1.3;
    box-shadow:0 18px 50px rgba(64,157,237,.45);
    animation:ringPulse 2.5s ease-out infinite;
    position:relative;z-index:3;padding:14px;
  }
  .hub .hub-logo{
    background:#fff;border-radius:10px;padding:6px 10px;margin-bottom:6px;
    box-shadow:0 4px 10px rgba(0,0,0,.12);
  }
  .hub .hub-logo img{height:22px;width:auto;display:block}
  .hub small{display:block;font-size:10px;font-weight:700;opacity:.95;margin-top:2px;letter-spacing:.05em}
  .ai-chip{
    position:absolute;background:#fff;border:1px solid var(--border);
    border-radius:14px;padding:10px 14px 10px 10px;display:flex;align-items:center;gap:8px;
    box-shadow:var(--shadow);font-weight:800;font-size:13px;color:var(--ink);
    z-index:2;
  }
  .ai-chip .b{
    width:26px;height:26px;border-radius:8px;color:#fff;font-size:11px;font-weight:900;
    display:flex;align-items:center;justify-content:center;
  }
  .ai-chip.c1{top:20px;left:50%;transform:translateX(-50%)}
  .ai-chip.c2{top:32%;right:6px}
  .ai-chip.c3{bottom:22px;right:18%}
  .ai-chip.c4{bottom:22px;left:18%}
  .ai-chip.c5{top:32%;left:6px;border:1.5px dashed var(--brand)}
  .ai-orbit{
    position:absolute;inset:0;
    border:1.5px dashed rgba(64,157,237,.35);border-radius:50%;
    width:300px;height:300px;margin:auto;
  }
  .ai-orbit.o2{width:380px;height:380px;border-color:rgba(6,199,85,.25)}

  /* ===== Interactive Demo (tabs + chat) ===== */
  .demo-section{background:#fff}
  .demo-wrap{
    background:linear-gradient(180deg,#F7FAFE,#fff);
    border:1px solid var(--border);border-radius:24px;padding:30px;
    box-shadow:var(--shadow);
    display:grid;grid-template-columns:1fr 1.1fr;gap:36px;align-items:center;
  }
  .tabs{display:flex;flex-direction:column;gap:10px}
  .tab{
    text-align:left;border:1px solid var(--border);background:#fff;
    border-radius:14px;padding:16px 18px;cursor:pointer;
    display:flex;align-items:flex-start;gap:14px;font-family:inherit;
    transition:transform .2s, border-color .2s, box-shadow .2s, background .2s;
  }
  .tab:hover{transform:translateX(4px);border-color:#CDE3F8}
  .tab.active{
    border-color:var(--brand);
    background:linear-gradient(135deg,#fff,var(--brand-light));
    box-shadow:var(--shadow);
  }
  .tab .tnum{
    width:34px;height:34px;border-radius:10px;background:var(--brand-light);
    color:var(--brand-dark);display:flex;align-items:center;justify-content:center;
    font-weight:900;flex:none;
  }
  .tab.active .tnum{background:var(--brand);color:#fff}
  .tab .tt{font-weight:800;font-size:15px;margin-bottom:2px}
  .tab .td{color:var(--muted);font-size:13px}

  /* ===== App-frame UI Mockup ===== */
  .app-frame{
    background:#fff;border-radius:14px;border:1px solid var(--border);
    box-shadow:var(--shadow-lg);overflow:hidden;display:flex;flex-direction:column;
    min-height:560px;
  }
  .app-bar{
    background:linear-gradient(180deg,#F2F8FF,#E8F0FA);
    padding:10px 14px;display:flex;align-items:center;gap:7px;
    border-bottom:1px solid var(--border);
  }
  .app-dot{width:11px;height:11px;border-radius:50%;flex:none}
  .app-dot.r{background:#FF5F57}
  .app-dot.y{background:#FEBC2E}
  .app-dot.g{background:#28C840}
  .app-title{
    margin-left:auto;margin-right:auto;font-size:12px;font-weight:800;color:var(--ink-2);
    display:flex;align-items:center;gap:8px;
  }
  .app-title img{height:18px;display:block}
  .app-body{padding:20px;flex:1;background:#FAFCFE;overflow:hidden}
  .app-screen{display:none}
  .app-screen.active{display:block;animation:scrIn .35s ease-out}
  @keyframes scrIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}

  /* Common mock elements */
  .mock-h{
    font-size:14px;font-weight:900;color:var(--ink);text-align:center;
    padding-bottom:10px;margin:-4px 0 14px;border-bottom:1px solid var(--border);
  }
  .mock-label{font-size:11px;color:var(--ink-2);font-weight:700;margin:10px 0 4px;display:flex;align-items:center;justify-content:space-between}
  .mock-copy{cursor:pointer;font-size:13px}
  .mock-input{
    background:#fff;border:1px solid var(--border);border-radius:6px;
    padding:7px 12px;font-size:12px;color:var(--ink);
    display:flex;justify-content:space-between;align-items:center;
  }
  .mock-input--red{color:#B91C1C;border-color:#FCA5A5;background:#FEF7F7}
  .mock-textarea{
    background:#fff;border:1px solid var(--border);border-radius:6px;
    padding:10px 12px;font-size:11px;color:var(--ink-2);line-height:1.7;
    height:155px;overflow:hidden;
  }
  .mock-btn{
    background:#fff;border:1px solid var(--border);border-radius:6px;
    padding:8px 16px;font-size:12px;font-weight:700;color:var(--ink);
    display:inline-flex;align-items:center;gap:6px;cursor:pointer;
  }
  .mock-btn--brand{background:var(--brand);color:#fff;border-color:var(--brand);box-shadow:0 2px 8px rgba(64,157,237,.3)}
  .mock-action{display:flex;align-items:center;gap:14px;margin-top:10px}
  .mock-check{font-size:12px;color:var(--ink-2);display:inline-flex;align-items:center;gap:6px;cursor:pointer}
  .mock-check__box{
    width:16px;height:16px;border-radius:3px;background:var(--brand);color:#fff;
    display:inline-flex;align-items:center;justify-content:center;font-size:11px;font-weight:900;
  }
  .mock-response{
    background:#fff;border:1px dashed #CDE3F8;border-radius:6px;
    padding:12px 14px;font-size:11.5px;color:var(--ink);line-height:1.75;
    height:260px;overflow:hidden;
  }

  /* Screen 1: AIアシスタント */
  .scr-assist{display:grid;grid-template-columns:1fr 1fr;gap:18px}
  .scr-assist .col{display:flex;flex-direction:column}

  /* Screen 2: 自動応答 Config */
  .scr-config{padding:0 4px}
  .cfg-header{
    display:flex;align-items:center;gap:12px;margin-bottom:16px;
    padding-bottom:12px;border-bottom:1px solid var(--border);
  }
  .cfg-ico{
    width:36px;height:36px;border-radius:8px;background:var(--brand-light);
    display:flex;align-items:center;justify-content:center;color:var(--brand-dark);font-size:18px;
  }
  .cfg-eyebrow{font-size:11px;color:var(--muted);font-weight:700;letter-spacing:.05em}
  .cfg-name{font-size:15px;font-weight:900;color:var(--ink)}
  .cfg-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px 24px}
  .cfg-field{display:flex;flex-direction:column;gap:3px}
  .cfg-lbl{font-size:11px;color:var(--muted);font-weight:700}
  .cfg-val{font-size:12.5px;color:var(--ink);font-weight:600;padding:3px 0;border-bottom:1px dashed var(--border)}
  .cfg-pill{
    display:inline-block;background:var(--brand);color:#fff;
    padding:2px 12px;border-radius:999px;font-size:11px;font-weight:800;
  }
  .cfg-check{color:#15803D;font-weight:900;font-size:14px}
  .cfg-link{color:var(--brand-dark);text-decoration:underline;cursor:pointer}
  .cfg-section{
    background:#F2F8FF;border-radius:6px;padding:8px 14px;margin-top:18px;
    font-size:12px;font-weight:800;color:var(--ink);
  }

  /* Screen 3: 会話要約 + TODO */
  .scr-chat{display:flex;flex-direction:column;align-items:center;gap:12px;padding:8px 4px}
  .chat-date{
    background:#6B7280;color:#fff;padding:5px 16px;border-radius:999px;
    font-size:11px;font-weight:700;
  }
  .chat-bubble{
    width:100%;max-width:480px;background:#fff;border:1px solid var(--border);
    border-radius:10px;padding:16px 18px;font-size:12.5px;color:var(--ink);line-height:1.85;
    box-shadow:0 2px 6px rgba(15,36,56,.05);
  }
  .chat-bubble p{margin:0}
  .chat-section{color:#1E3A8A;font-weight:900;font-size:13px;margin-bottom:6px}
  .chat-meta{font-size:11px;color:var(--muted);width:100%;max-width:480px;text-align:right;padding-right:4px}

  /* Screen 4: 定期分析 Config */
  .scr-period{padding:0 2px;font-size:12px}
  .prd-header{
    display:flex;align-items:center;justify-content:space-between;
    margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid var(--border);
  }
  .prd-header h4{margin:0;font-size:14px;font-weight:900;color:var(--ink)}
  .prd-edit{
    background:var(--brand);color:#fff;border:0;padding:5px 18px;border-radius:6px;
    font-size:11px;font-weight:800;cursor:pointer;
  }
  .prd-check{
    display:flex;align-items:center;gap:8px;margin:14px 0 6px;
    font-size:13px;font-weight:800;color:var(--ink);
  }
  .prd-chk{
    width:18px;height:18px;border-radius:4px;background:var(--brand);color:#fff;
    display:inline-flex;align-items:center;justify-content:center;font-size:11px;font-weight:900;
    flex:none;
  }
  .prd-info{font-size:11px;color:var(--muted);font-weight:600}
  .prd-link{color:var(--brand-dark);text-decoration:underline;font-size:11px;font-weight:600;margin-left:4px;cursor:pointer}
  .prd-sub{margin-left:26px;display:grid;grid-template-columns:1fr 1fr;gap:8px 14px;margin-bottom:6px}
  .prd-sub--3{grid-template-columns:1fr 1fr 1fr}
  .prd-field{display:flex;flex-direction:column;gap:3px}
  .prd-lbl{font-size:10.5px;color:var(--ink-2);font-weight:600}
  .prd-val{
    background:#fff;border:1px solid var(--border);border-radius:5px;
    padding:5px 9px;font-size:11.5px;color:var(--ink);
  }
  .prd-extract{margin-top:14px;margin-left:26px}
  .prd-ex-title{font-size:11px;font-weight:800;color:var(--ink);margin-bottom:6px;display:flex;gap:60px}
  .prd-ex-sub{color:var(--ink-2);font-weight:700}
  .prd-ex-row{
    display:flex;gap:8px;align-items:center;
    padding:6px 8px;
  }
  .prd-ex-num{
    width:22px;height:22px;border-radius:50%;background:#EEF2F7;color:var(--ink);
    display:inline-flex;align-items:center;justify-content:center;font-size:10px;font-weight:800;flex:none;
  }
  .prd-ex-cat{
    background:#fff;border:1px solid var(--border);padding:4px 12px;border-radius:5px;
    font-size:11px;font-weight:700;color:var(--ink);flex:none;min-width:80px;
  }
  .prd-ex-prompt{
    flex:1;background:#fff;border:1px solid var(--border);border-radius:5px;
    padding:4px 10px;font-size:11px;color:var(--ink-2);
  }

  @media(max-width:880px){
    .demo-wrap{grid-template-columns:1fr;gap:24px}
    .ai-stage{height:360px}
    .app-frame{min-height:auto}
    .app-body{padding:14px}
    .scr-assist{grid-template-columns:1fr;gap:10px}
    .cfg-grid{grid-template-columns:1fr;gap:10px}
    .prd-sub,.prd-sub--3{grid-template-columns:1fr;margin-left:18px}
    .prd-ex-row{flex-wrap:wrap}
    .prd-ex-prompt{flex:1 1 100%;margin-top:4px}
    .mock-textarea{height:120px}
    .mock-response{height:200px}
  }

  /* ===== Animated counter (benefits) ===== */
  .stat-num{font-size:48px;font-weight:900;line-height:1;
    background:linear-gradient(90deg,var(--brand),var(--line));
    -webkit-background-clip:text;background-clip:text;color:transparent;
  }
  .stat-num .unit{font-size:24px;margin-left:2px}

  /* ===== Mobile architecture (vertical) ===== */
  .arch-mobile{display:none}
  .arch-svg-desktop{display:block}
  .arch-node{
    background:#fff;border:1px solid var(--border);border-radius:18px;
    padding:16px;display:flex;align-items:center;gap:14px;
    box-shadow:var(--shadow);
  }
  .arch-node__avatar{
    width:48px;height:48px;border-radius:14px;flex:none;
    display:flex;align-items:center;justify-content:center;color:#fff;font-weight:900;
  }
  .arch-node__avatar--line{background:linear-gradient(135deg,#06C755,#0AA147)}
  .arch-node__title{font-weight:900;font-size:15px;margin-bottom:2px;color:var(--ink)}
  .arch-node__desc{color:var(--muted);font-size:13px}
  .arch-node--hub{
    background:linear-gradient(135deg,var(--brand),var(--brand-dark));
    border-color:transparent;color:#fff;
  }
  .arch-node__logo{
    background:#fff;border-radius:12px;padding:8px 12px;flex:none;
    box-shadow:0 6px 14px rgba(0,0,0,.15);
  }
  .arch-node__logo img{height:28px;width:auto;display:block}
  .arch-chips{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
  .arch-chips span{
    background:rgba(255,255,255,.2);color:#fff;font-size:11px;font-weight:700;
    padding:4px 10px;border-radius:999px;
  }
  .arch-ai-grid{
    display:grid;grid-template-columns:repeat(2,1fr);gap:8px;
  }
  .arch-ai-grid span{
    display:flex;align-items:center;gap:8px;
    background:#F2F8FF;border:1px solid var(--border);border-radius:10px;
    padding:8px 10px;font-size:13px;font-weight:700;color:var(--ink);
  }
  .arch-ai-grid span b{
    width:24px;height:24px;border-radius:7px;color:#fff;font-size:10px;font-weight:900;
    display:flex;align-items:center;justify-content:center;flex:none;
  }
  .arch-out-grid{
    display:grid;grid-template-columns:repeat(2,1fr);gap:8px;
  }
  .arch-out-grid span{
    padding:10px;border-radius:10px;font-size:12px;font-weight:800;text-align:center;
  }
  .arch-out-grid .out-1{background:#FFF2EC;color:#E04E2A}
  .arch-out-grid .out-2{background:#E8F8EE;color:#0AA147}
  .arch-out-grid .out-3{background:#E8F3FE;color:#1E6FBE}
  .arch-out-grid .out-4{background:#F3E8FF;color:#7C3AED}
  .arch-arrow{display:flex;justify-content:center;padding:6px 0}
  .arch-arrow svg{width:20px;height:32px;animation:floaty 2s ease-in-out infinite}

  @media(max-width:880px){
    .arch-svg-desktop{display:none}
    .arch-mobile{display:flex;flex-direction:column}
  }

  /* ===== Mobile fine-tuning ===== */
  @media(max-width:880px){
    section{padding:64px 16px}
    .hero-inner{padding:48px 16px 40px;gap:32px}
    h1.hero-title{font-size:30px;line-height:1.3}
    .hero-lead{font-size:15px}
    h2.section-title{font-size:24px;line-height:1.4}
    .section-lead{font-size:14px}
    .section-head{margin-bottom:36px}

    /* Hero illustration shrink */
    .hero-art{padding:12px;border-radius:18px}
    .ai-stage{height:320px}
    .hub{width:120px;height:120px;padding:10px}
    .hub .hub-logo{padding:5px 8px}
    .hub .hub-logo img{height:18px}
    .hub small{font-size:9px}
    .ai-orbit{width:230px;height:230px}
    .ai-orbit.o2{width:300px;height:300px}
    .ai-chip{padding:7px 10px 7px 7px;font-size:11px;border-radius:10px}
    .ai-chip .b{width:22px;height:22px;font-size:9px;border-radius:6px}
    .ai-chip.c1{top:14px}
    .ai-chip.c2{right:4px}
    .ai-chip.c3{bottom:14px}
    .ai-chip.c4{left:4px}

    /* Architecture wrapper */
    .arch-wrap{padding:18px;border-radius:18px}

    /* Demo */
    .demo-wrap{padding:18px;border-radius:18px}

    /* Tabs */
    .tab{padding:12px 14px;gap:10px}
    .tab .tnum{width:30px;height:30px;font-size:13px}
    .tab .tt{font-size:14px}
    .tab .td{font-size:12px}

    /* Feature cards */
    .feature{padding:22px;border-radius:16px}
    .feature h3{font-size:17px}
    .feature p{font-size:14px}

    /* Stats */
    .stat-num{font-size:38px}
    .benefit{padding:22px}

    /* CTA */
    .cta-section h2{font-size:24px}
    .cta-section p{font-size:15px}

    /* Header */
    .nav{padding:10px 16px}
    .logo img{height:30px}
    .cta-btn{padding:8px 14px;font-size:13px}
  }

  @media(max-width:420px){
    h1.hero-title{font-size:26px}
    .ai-stage{height:280px}
    .hub{width:104px;height:104px}
    .hub .hub-logo img{height:16px}
    .ai-orbit{width:200px;height:200px}
    .ai-orbit.o2{width:260px;height:260px}
    .ai-chip{font-size:10px;padding:6px 8px 6px 6px}
    .ai-chip .b{width:20px;height:20px;font-size:8px}
    .btn-primary,.btn-ghost{padding:12px 18px;font-size:14px;width:100%;justify-content:center;text-align:center}
    .hero-ctas{flex-direction:column}
    .arch-ai-grid,.arch-out-grid{grid-template-columns:1fr}
  }