body {
  background: #f6f7fb;
  font-family: 'Noto Sans TC', 'Microsoft JhengHei', Arial, sans-serif;
  margin: 0;
  padding: 0;
}
.container {
  max-width: 400px;
  margin: 32px auto;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 3px 16px rgba(0, 0, 0, 0.07);
  padding: 32px 24px 24px 24px;
}
h1 {
  text-align: center;
  color: #c7252c;
  font-size: 1.5rem;
  letter-spacing: 2px;
  margin-bottom: 16px;
}
.desc {
  color: #555;
  font-size: 1rem;
  margin-bottom: 24px;
  line-height: 1.6;
  text-align: center;
}
.form-group {
  margin-bottom: 18px;
}
label {
  display: block;
  margin-bottom: 6px;
  color: #222;
  font-size: 1rem;
}
.required {
  color: #d21;
  font-size: 1rem;
}
input[type='text'],
input[type='tel'] {
  width: 100%;
  padding: 8px 12px;
  border: 1.2px solid #cfcfcf;
  border-radius: 6px;
  font-size: 1rem;
  box-sizing: border-box;
  transition: border 0.2s;
}
input:focus {
  border-color: #c7252c;
  outline: none;
}
button[type='submit'] {
  width: 100%;
  padding: 12px 0;
  background: #c7252c;
  color: #fff;
  font-size: 1.1rem;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.2s;
  margin-top: 8px;
  letter-spacing: 1px;
}
button[type='submit']:hover:not(:disabled) {
  background: #a11b23;
}
button[type='submit']:disabled {
  background: #d8d8d8;
  cursor: not-allowed;
}
.msg {
  margin-top: 18px;
  font-size: 1rem;
  text-align: center;
  color: #333;
}
.msg.success {
  color: #1abc9c;
}
.msg.error {
  color: #d21;
}