body {
    margin: 0;
    font-family: "Helvetica", "Arial", sans-serif;
    color: #333;
    background: #f5f7fb;
}

/* ---------- Header ---------- */
header {
    padding: 16px 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #ffffff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.03);
    position: sticky;
    top: 0;
    z-index: 10;
}
.logo {
    font-size: 22px;
    font-weight: bold;
}
nav a {
    margin-left: 20px;
    font-size: 14px;
    text-decoration: none;
    color: #333;
}
nav a:hover {
    text-decoration: underline;
}

/* ---------- Hero ---------- */
.hero {
    padding: 80px 20px 60px;
    background: linear-gradient(135deg, #e6eeff 0%, #f9fbff 100%);
    text-align: center;
}
.hero-inner {
    max-width: 960px;
    margin: 0 auto;
}
.hero-label {
    display: inline-block;
    font-size: 12px;
    background: #004bcc;
    color: #fff;
    padding: 4px 10px;
    border-radius: 999px;
    margin-bottom: 16px;
}
.hero h1 {
    font-size: 32px;
    margin: 0 0 16px;
}
.hero h1 span {
    color: #0066ff;
}
.hero p {
    font-size: 16px;
    margin: 0 0 24px;
    line-height: 1.6;
}
.hero-badges {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 24px;
}
.badge {
    font-size: 12px;
    border-radius: 999px;
    padding: 4px 10px;
    background: #ffffff;
    border: 1px solid #d0dcff;
}
.btn-primary {
    display: inline-block;
    background: #0066ff;
    color: #fff;
    padding: 14px 32px;
    border-radius: 8px;
    font-size: 16px;
    text-decoration: none;
}
.btn-primary:hover {
    opacity: 0.9;
}
.hero-note {
    font-size: 12px;
    color: #666;
    margin-top: 8px;
}

/* ---------- Sections ---------- */
.section {
    padding: 60px 20px;
}
.section-inner {
    max-width: 960px;
    margin: 0 auto;
}
.section-title {
    font-size: 24px;
    margin-bottom: 8px;
    text-align: center;
}
.section-lead {
    text-align: center;
    font-size: 14px;
    color: #666;
    margin-bottom: 32px;
}

/* ---------- Cards ---------- */
.card-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
}
.card {
    background: #ffffff;
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.04);
}
.card h3 {
    font-size: 16px;
    margin-bottom: 8px;
}
.card p {
    font-size: 14px;
    line-height: 1.6;
    margin: 0;
}
.card-label {
    font-size: 11px;
    display: inline-block;
    padding: 2px 8px;
    border-radius: 999px;
    background: #eef4ff;
    color: #004bcc;
    margin-bottom: 8px;
}

/* ---------- Flow ---------- */
.flow-list {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
}
.flow-item {
    background: #ffffff;
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.04);
    position: relative;
}
.flow-step {
    position: absolute;
    top: 16px;
    left: 16px;
    font-size: 11px;
    padding: 2px 8px;
    border-radius: 999px;
    background: #0066ff;
    color: #fff;
}
.flow-item h3 {
    margin-top: 32px;
    font-size: 16px;
    margin-bottom: 8px;
}
.flow-item p {
    font-size: 14px;
    margin: 0;
    line-height: 1.6;
}

/* ---------- Input examples ---------- */
.list-two-column {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px 24px;
    font-size: 14px;
}
.list-two-column li {
    list-style: none;
    position: relative;
    padding-left: 14px;
}
.list-two-column li::before {
    content: "・";
    position: absolute;
    left: 0;
    top: 0;
}

/* ---------- Safety section ---------- */
.safety-box {
    background: #ffffff;
    border-radius: 12px;
    padding: 24px 20px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.04);
}
.safety-items {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
    margin-top: 16px;
}
.safety-item {
    font-size: 13px;
    line-height: 1.6;
}

/* ---------- FAQ ---------- */
.faq-list {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
}
.faq-item {
    background: #ffffff;
    border-radius: 8px;
    padding: 16px 14px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.03);
}
.faq-q {
    font-size: 14px;
    font-weight: bold;
    margin-bottom: 4px;
}
.faq-a {
    font-size: 13px;
    color: #555;
}

/* ---------- Bottom CTA ---------- */
.cta {
    text-align: center;
    padding: 60px 20px 50px;
    background: #eef4ff;
}
.cta h2 {
    font-size: 22px;
    margin-bottom: 8px;
}
.cta p {
    font-size: 14px;
    color: #555;
    margin-bottom: 24px;
}

footer {
    text-align: center;
    padding: 16px;
    font-size: 12px;
    color: #777;
    background: #ffffff;
}

/* ---------- Mobile Optimized ---------- */
@media (max-width: 768px) {

  /* Header */
  header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  nav {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
  }

  nav a {
    margin-left: 0;
    font-size: 13px;
  }

  /* Hero */
  .hero {
    padding: 48px 16px 40px;
  }

  .hero h1 {
    font-size: 22px;
    line-height: 1.4;
  }

  .hero p {
    font-size: 14px;
    line-height: 1.7;
  }

  .hero-badges {
    gap: 6px;
  }

  /* CTA Button（最重要） */
  .btn-primary {
    width: 100%;
    max-width: 320px;
    padding: 14px 0;
    font-size: 15px;
  }

  /* Sections */
  .section {
    padding: 40px 16px;
  }

  .section-title {
    font-size: 20px;
  }

  .section-lead {
    font-size: 13px;
    margin-bottom: 24px;
  }

  /* Cards / Flow / Safety */
  .card-grid,
  .flow-list,
  .safety-items {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .card,
  .flow-item {
    padding: 18px;
  }

  /* List */
  .list-two-column {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  /* FAQ */
  .faq-q {
    font-size: 13px;
  }

  .faq-a {
    font-size: 12px;
  }

  /* Footer */
  footer {
    font-size: 11px;
  }
}