.cooperation_container {
  background-color: #fff;
  height: 100%;
  padding: 30px;
}

.cooperation_container h1 {
  padding: 20px 0;
  font-size: 26px;
  letter-spacing: 3px;
  text-align: center;
}

.cooperation_container p {
  text-indent: 2em;
  font-size: 16px;
  line-height: 35px;
}

.text_laign_right {
  text-align: right;
  /* 首行缩进两个字符 */
  text-indent: -2em;
  /* 为了让缩进的内容不超出容器，增加右侧内边距 */
  padding-right: 2em;
}

/* 表单 */
.form_item {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
}

.form_item label {
  width: 230px;
  color: #000;
}

.form_item input {
  flex: 1;
}

/* 上传封面 */
.upload_file_container .upload_file {
  width: 175px;
  height: 125px;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -ms-flex-direction: column;
  flex-direction: column;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  border: 1px solid #bbbbbb;
  border-radius: 4px;
  background-color: #f6f8ff;
  cursor: pointer;
}

.upload_file_container .upload_file i {
  width: 20px;
  height: 20px;
  text-align: center;
  line-height: 17px;
  color: #bbbbbb;
  border: 2px solid #bbbbbb;
  border-radius: 50%;
}

.upload_file_container .upload_file span {
  color: #bbbbbb;
  margin-top: 10px;
}

.file_table_container .file_list {
  margin-top: 20px;
}

.file_table_container .fa-trash-alt {
  color: red;
  cursor: pointer;
}

#fileInput {
  display: none;
}

#periodicalPreviewImage {
  width: 150px;
  height: 200px;
}

.cooperation_button_container {
  text-align: center;
  margin-top: 10px;
}

.cooperation_button_container .operation_btn {
  width: 150px;
  height: 40px;
  border: none;
  font-size: 16px;
}

/* 提交申请按钮 */
.operation_btn:hover {
  background-color: #0356cc;
}