.complex_form {
  margin: 20px auto;
  border: 2px solid #f74003;
  padding: 25px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  border-radius: 12px;
  background: linear-gradient(135deg, #fff8f5, #ffffff);
  max-width: 700px;
  width: 100%;
  box-shadow: 0 6px 16px rgba(0,0,0,0.12);
  transition: box-shadow 0.3s ease;
}

.complex_form:hover {
  box-shadow: 0 8px 20px rgba(0,0,0,0.18);
}

.complex_form .form_title {
  font-size: 22px;
  font-weight: bold;
  margin: -25px -25px 20px -25px;
  padding: 15px 25px;
  color: #ffffff;
  background: linear-gradient(90deg, #ff512f, #dd2476);
  border-radius: 12px 12px 0 0;
  letter-spacing: 0.5px;
}

.complex_form input,
.complex_form textarea {
  border: 1.5px solid #e0e0e0;
  border-radius: 8px;
  padding: 12px 15px;
  font-size: 16px;
  transition: border 0.3s ease, box-shadow 0.3s ease;
}

.complex_form input:focus,
.complex_form textarea:focus {
  border-color: #ff6a3d;
  box-shadow: 0 0 0 3px rgba(255,106,61,0.25);
  outline: none;
}

.complex_form .form_element::placeholder {
  font-family: Arial, sans-serif;
  font-size: 16px;
  color: #b5b5b5
}
.complex_form .form_actions {
  display: flex;
  justify-content: flex-end;  /* 水平方向靠右 */
  margin-top: 10px;
}

/* .complex_form button.btn {
  width: auto;
  display: inline-block;
  padding: 10px 25px;
  font-size: 18px;
  font-weight: bold;
  border-radius: 8px;
  border: none;
  cursor: pointer;

  color: #fff;
  background: linear-gradient(135deg, #ff5f1f, #ff8347);
  box-shadow: 0 4px 8px rgba(0,0,0,0.15);
  transition: all 0.25s ease-in-out;
}

.complex_form button.btn:hover {
  background: linear-gradient(135deg, #ff8347, #ff5f1f);
  transform: translateY(-2px);
  box-shadow: 0 6px 14px rgba(0,0,0,0.2);
}

.complex_form button.btn:active {
  transform: translateY(1px);
  box-shadow: 0 3px 6px rgba(0,0,0,0.2);
} */