body {
  background: #fff;
  color: #222;
  font-family: 'Noto Sans JP', 'Roboto', 'Zen Kaku Gothic New', 'Montserrat', sans-serif;
  margin: 0;
  padding: 0;
}
.site-header{
  background-image: none; 
  min-height: 0;
}

.sub-nav a {
  background: #fff;
  color: #222;
}
li.contact-btn {
  background: transparent;
  color: #222;
  padding: 8px 20px;
  border-radius: 20px;
  border: 1px solid #222;
  transition: all 0.3s ease;
}
li.contact-btn:hover {
  background: #222;
  color: #fff;
}

.contact-title {
  /* font-size: 2.2rem;
  font-family: 'Montserrat', 'Zen Kaku Gothic New', sans-serif;
  font-weight: 700;
  letter-spacing: 0.18em;
  margin: 160px 0 0 0; */
  text-align: center;
}
.contact-subtitle {
  font-size: 1.2rem;
  font-weight: 400;
  margin: 10px 0 80px 0;
  letter-spacing: 0.1em;
  text-align: center;
}
.contact-form {
  margin: 0 auto;
  background: #fff;
  padding: 32px 24px;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.04);
}
.form-group {
  margin-bottom: 24px;
  text-align: left;
}
.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 700;
}
.form-group input,
.form-group textarea {
  width: 100%;
  padding: 10px;
  border: 1px solid #bbb;
  border-radius: 6px;
  font-size: 1rem;
  background: #fafafa;
  box-sizing: border-box;
}
.form-group textarea {
  resize: vertical;
}
.contact-btn {
  display: inline-block;
  background: #F6B009;
  color: #fff;
  border: none;
  border-radius: 20px;
  padding: 12px 36px;
  /* font-size: 1.1rem;
  font-weight: 700; */
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: background 0.3s;
}
.contact-btn:hover {
  background: #222;
  color: #fff;
}
footer {
  padding-top: 160px;
}

@media (max-width: 600px) {
  .contact-section {
    margin: 100px auto 0;
    padding: 0 8px;
  }
  .contact-form {
    padding: 16px 4px;
  }
}