@charset "utf-8";
:root {
    --primary: #1e293b;    /* 誠実なネイビー */
    --accent: #f97316;     /* 活気あるオレンジ */
    --bg: #f8fafc;
    --card-bg: #ffffff;
    --text-main: #334155;
    --text-muted: #64748b;
    --line: #e2e8f0;
    --radius-lg: 24px;
    --radius-md: 12px;
    --max-w: 800px; /* 読みやすさ重視で少し絞る */
  }

  * { box-sizing: border-box; }
  body {
    margin: 0;
    font-family: "Verdana", "Hiragino Kaku Gothic ProN", "Meiryo", sans-serif;
    color: var(--text-main);
    background-color: var(--bg);
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
  }

  /* Header */
  .header {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    position: sticky; top: 0; z-index: 100;
    border-bottom: 1px solid var(--line);
  }
  .header-inner {
    max-width: var(--max-w); margin: 0 auto;
    padding: 12px 20px;
    display: flex; align-items: center; justify-content: space-between;
  }
  .logo {
    font-weight: 800; font-size: 18px; color: var(--primary);
    text-decoration: none; display: flex; align-items: center; gap: 8px;
  }
  .logo::before {
    content: ""; width: 24px; height: 24px; 
    background: var(--accent); border-radius: 6px;
  }

  .container { max-width: var(--max-w); margin: 0 auto; padding: 24px 20px 100px; }

  /* Hero Section */
  .hero {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 10px 25px -5px rgba(0,0,0,0.05);
    margin-bottom: 32px;
  }
  .hero-img { width: 100%; height: auto; display: block; background: #eee; }
  .hero-content { padding: 40px; text-align: center; }
  .kicker { 
    display: inline-block; background: #fff7ed; color: var(--accent);
    font-size: 12px; font-weight: bold; padding: 4px 12px; border-radius: 20px; margin-bottom: 16px;
  }
  h1 { 
    font-size: clamp(24px, 5vw, 32px); color: var(--primary); 
    line-height: 1.3; margin: 0 0 20px; letter-spacing: -0.5px;
  }
  .lead { color: var(--text-muted); font-size: 16px; margin-bottom: 32px; }

  /* Buttons */
  .btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 16px 32px; border-radius: var(--radius-md);
    font-weight: bold; text-decoration: none; transition: 0.2s;
    font-size: 16px;
  }
  .btn-primary { background: var(--primary); color: white; box-shadow: 0 4px 14px rgba(30,41,59,0.3); }
  .btn-primary:hover { transform: translateY(-2px); opacity: 0.9; }

  /* Grid Section */
  .section { margin-bottom: 40px; }
  .section-title { 
    font-size: 20px; font-weight: bold; margin-bottom: 20px; 
    display: flex; align-items: center; gap: 10px;
  }
  .section-title::after { content: ""; flex: 1; height: 1px; background: var(--line); }

  .grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
  .card { 
    background: var(--card-bg); padding: 24px; border-radius: var(--radius-md);
    border: 1px solid var(--line);
  }
  .card h3 { margin: 0 0 8px; font-size: 14px; color: var(--text-muted); }
  .card p { margin: 0; font-size: 16px; font-weight: bold; color: var(--primary); }

  /* Instructions */
  .steps { padding: 0; list-style: none; counter-reset: step-counter; }
  .steps li { 
    background: var(--card-bg); margin-bottom: 12px; padding: 16px 20px;
    border-radius: var(--radius-md); display: flex; align-items: center; gap: 15px;
    border: 1px solid var(--line);
  }
  .steps li::before {
    counter-increment: step-counter; content: counter(step-counter);
    width: 28px; height: 28px; background: var(--accent); color: white;
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-size: 14px; font-weight: bold; flex-shrink: 0;
  }

  /* Risk Warning */
  .warning-box {
    background: #fef2f2; border: 1px solid #fee2e2; border-radius: var(--radius-md);
    padding: 20px; margin-top: 40px;
  }
  .warning-box h4 { margin: 0 0 8px; color: #b91c1c; font-size: 14px; }
  .warning-box p { margin: 0; font-size: 13px; color: #7f1d1d; line-height: 1.6; }

  /* FAQ */
  details { background: var(--card-bg); border: 1px solid var(--line); border-radius: var(--radius-md); margin-bottom: 8px; overflow: hidden; }
  summary { padding: 16px 20px; cursor: pointer; font-weight: bold; list-style: none; display: flex; justify-content: space-between; align-items: center; }
  summary::after { content: "+"; color: var(--text-muted); }
  details[open] summary::after { content: "-"; }
  .faq-content { padding: 0 20px 16px; color: var(--text-muted); font-size: 14px; border-top: 1px solid var(--line); padding-top: 16px; }

  /* Sticky Footer CTA */
  .sticky-cta {
    position: fixed; bottom: 20px; left: 20px; right: 20px;
    background: var(--primary); color: white; padding: 12px 20px;
    border-radius: 16px; display: flex; align-items: center; justify-content: space-between;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2); z-index: 200;
    visibility: hidden; opacity: 0; transition: 0.3s;
  }
  .sticky-cta.show { visibility: visible; opacity: 1; transform: translateY(0); }
  .sticky-btn { background: var(--accent); color: white; padding: 8px 20px; border-radius: 8px; text-decoration: none; font-weight: bold; font-size: 14px; }

  @media (max-width: 600px) {
    .hero-content { padding: 30px 20px; }
    .container { padding-bottom: 120px; }
  }