body {
  font-family: sans-serif;
  margin: 0;
  padding: 0;
  background: #f8f8f8;
  color: #333;
}

header {
  background-color: #004080;
  color: #fff;
  padding: 1em;
  text-align: center;
}

nav a {
  margin: 0 1em;
  color: #fff;
  text-decoration: none;
  display: inline-block;
}

main {
  padding: 2em;
}

h2 {
  text-align: center;
}

.product-list {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5em;
  justify-content: center;
}

.product-card {
  background: #fff;
  padding: 1em;
  border-radius: 8px;
  box-shadow: 0 0 5px rgba(0,0,0,0.1);
  width: 300px;
  text-align: center;
}

.product-card img {
  max-width: 100%;
  height: auto;
}

.btn {
  display: inline-block;
  padding: 0.5em 1em;
  background: #0070c0;
  color: white;
  border-radius: 5px;
  text-decoration: none;
  margin-top: 1em;
  transition: background 0.3s;
}

.btn:hover {
  background: #005fa3;
}

.sold-out {
  display: inline-block;
  background: #ccc;
  color: #888;
  padding: 0.5em 1em;
  border-radius: 5px;
  margin-top: 1em;
  font-weight: bold;
}

footer {
  text-align: center;
  padding: 1em;
  background: #eee;
}

/* スマホ対応 */
@media (max-width: 600px) {
  .product-list {
    flex-direction: column;
    align-items: center;
  }

  nav a {
    display: block;
    margin: 0.5em 0;
  }
}

.faq {
  max-width: 800px;
  margin: 0 auto;
  padding: 1em;
}

.question {
  margin-bottom: 1.5em;
  background: #fff;
  border-left: 4px solid #0070c0;
  padding: 1em;
  border-radius: 5px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.question h3 {
  margin-top: 0;
  color: #0070c0;
}

@media (max-width: 600px) {
  .faq {
    padding: 1em 0.5em;
  }
}
.about-section {
  max-width: 800px;
  margin: 2em auto;
  padding: 1em;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

.about-section h2 {
  font-size: 1.8em;
  color: #0070c0;
  margin-bottom: 1em;
}

.about-section h3 {
  font-size: 1.2em;
  margin-top: 1.5em;
  color: #333;
}

.about-section p,
.about-section ul {
  font-size: 1em;
  line-height: 1.6;
}

.about-section ul {
  padding-left: 1.2em;
}

.about-section li {
  margin-bottom: 0.5em;
}

@media (max-width: 600px) {
  .about-section {
    padding: 1em 0.5em;
  }
}