.main {
  position: relative;
  width: 1420px;
  margin: 0 auto;
}
.content {
  width: 1200px;
  margin: 0 auto;
}
.line {
  margin: 60px auto 45px;
  width: 1200px;
  height: 2px;
  border-radius: 6px 6px 0 0;
  background: linear-gradient(90deg, #ff5c4b 0%, #f51133 100%);
}
.title_box {
  width: 100%;
  height: 33px;
  display: flex;
  justify-content: center;
  align-items: center;
}
.title_box .txt {
  font-size: 24px;
  font-family: "PingFangSC-Semibold";
  font-weight: 600;
  color: #000000;
  margin: 0 12px;
  position: relative;
}
.title_box .txt::before {
  position: absolute;
  top: 50%;
  left: -45px;
  transform: translateY(-50%);
  content: "";
  width: 30px;
  height: 3px;
  background-color: #000;
  opacity: 0.12;
}
.title_box .txt::after {
  position: absolute;
  top: 50%;
  right: -45px;
  transform: translateY(-50%);
  content: "";
  width: 30px;
  height: 3px;
  background-color: #000;
  opacity: 0.12;
}
.p1 {
  margin: 20px auto 10px;
  font-size: 14px;
  font-weight: 400;
  color: #666666;
  text-align: center;
}
.nav_item {
  width: 800px;
  height: 40px;
  line-height: 40px;
  margin: 15px auto;
  display: flex;
  border-radius: 40px;
  text-align: center;
  overflow: hidden;
  box-shadow: 0 0 1px 1px #ccc;
}
.nav_item .item {
  width: 200px;
  height: 100%;
  border-radius: 40px;
  cursor: pointer;
}
.nav_item .item_active {
  color: #fff;
  background-color: #515151;
}
.form {
  width: 800px;
  margin: 30px auto;
}
.form .form_item {
  display: none;
}
.form .active {
  display: block;
}
.form .form_item_box {
  width: 100%;
  margin-bottom: 20px;
  font-size: 14px;
  color: #424350;
}
.form .form_item_box .title {
  margin-bottom: 10px;
}
.form .form_item_box .title span {
  color: #ea5e6f;
  margin-right: 8px;
}
.form .form_item_box input {
  display: block;
  width: 100%;
  height: 36px;
  border: none;
  background: #f2f2f2;
  border-radius: 3px;
  padding: 0 10px;
}
.form .form_item_box .mode_input {
  width: 100%;
  height: 36px;
  display: flex;
}
.form .form_item_box .mode_input .checkbox_box {
  margin-right: 30px;
  display: flex;
  align-items: center;
  font-size: 14px;
  font-weight: 500;
  color: #333333;
}
.form .form_item_box .mode_input .checkbox_box input {
  width: 20px;
  height: 20px;
  margin-right: 10px;
}
.form .form_item_box .mode_input .checkbox_box input:checked {
  background-color: #f51133;
}
.form .form_item_box .testing_input {
  width: 100%;
  display: flex;
  align-items: center;
}
.form .form_item_box .testing_input input {
  width: 200px;
  margin-right: 15px;
}
.form .form_item_box .testing_input .img {
  width: 72px;
  height: 32px;
  background-color: #ccc;
  cursor: pointer;
}
.form .form_item_box .testing_input .img img {
  display: block;
  width: 100%;
  height: 100%;
}
.btn {
  width: 100%;
  margin: 43px auto;
  text-align: center;
}
.btn button {
  width: 300px;
  height: 43px;
  border-radius: 43px;
  background-color: #f51133;
  border: none;
  cursor: pointer;
  font-size: 18px;
  font-weight: 500;
  color: #ffffff;
}