*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

    :root {
      --bg: #f8f9fc;
      --surface: #ffffff;
      --border: #e2e5f0;
      --accent: #6366f1;
      --accent-hover: #4f46e5;
      --grad: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a78bfa 100%);
      --text: #1e1b4b;
      --text-muted: #64748b;
    }

    html { height: 100%; }
    body {
      font-family: "Hiragino Sans", "Meiryo", "Segoe UI", system-ui, sans-serif;
      background: var(--bg);
      color: var(--text);
      min-height: 100%;
      display: flex;
      flex-direction: column;
    }

    /* ── Header ── */
    header {
      display: flex; align-items: center; gap: 10px;
      padding: 12px 20px;
      background: var(--surface);
      border-bottom: 1px solid var(--border);
      box-shadow: 0 1px 4px rgba(0,0,0,.04);
    }
    .logo {
      width: 32px; height: 32px; border-radius: 8px;
      background: var(--grad);
      display: grid; place-items: center;
      color: #fff; font-weight: 700; font-size: 16px;
    }
    header h1 { font-size: 17px; font-weight: 700; color: var(--text); }


    /* ── Hero ── */
    .hero {
      text-align: center;
      padding: 72px 20px 48px;
      background: linear-gradient(180deg, #eef2ff 0%, var(--bg) 100%);
    }
    .hero h2 {
      font-size: 36px; font-weight: 800;
      background: var(--grad); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 16px;
    }
    .hero p {
      font-size: 17px; color: var(--text-muted);
      max-width: 520px; margin: 0 auto 32px;
      line-height: 1.7;
    }
    .hero-actions {
      display: flex;
      gap: 12px;
      justify-content: center;
      flex-wrap: wrap;
    }
    .cta {
      display: inline-block;
      padding: 14px 40px;
      background: var(--grad);
      color: #fff; font-size: 16px; font-weight: 600;
      border: none; border-radius: 10px;
      text-decoration: none;
      box-shadow: 0 4px 16px rgba(99,102,241,.3);
      transition: transform .15s, box-shadow .15s;
    }
    .cta:hover { transform: translateY(-2px); box-shadow: 0 6px 24px rgba(99,102,241,.4); }
    .cta.cta-secondary {
      background: var(--surface);
      color: var(--accent);
      border: 2px solid var(--accent);
      box-shadow: none;
    }
    .cta.cta-secondary:hover { background: #eef2ff; box-shadow: none; }

    /* ── Features ── */
    .features {
      display: flex; flex-direction: column; gap: 20px;
      padding: 8px 20px 64px;
      max-width: 560px; margin: 0 auto;
    }
    .feature-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 14px;
      padding: 28px 28px;
      display: flex;
      align-items: flex-start;
      gap: 20px;
      box-shadow: 0 2px 8px rgba(0,0,0,.04);
      transition: transform .15s, box-shadow .15s;
    }
    .feature-card:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(0,0,0,.08); }
    .feature-icon { font-size: 28px; flex-shrink: 0; margin-top: 2px; }
    .feature-card h3 { font-size: 15px; font-weight: 700; margin-bottom: 6px; }
    .feature-card p { font-size: 13px; color: var(--text-muted); line-height: 1.7; }

    /* ── Footer ── */
    footer {
      margin-top: auto;
      padding: 16px 20px;
      text-align: center;
      font-size: 11px;
      border-top: 1px solid var(--border);
      background: var(--surface);
    }
    footer a { color: var(--text-muted); text-decoration: none; opacity: .85; transition: opacity .2s; }
    footer a:hover { opacity: 1; text-decoration: underline; }
    footer a + a::before { content: " / "; opacity: .4; }