.grasp-flex_column {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: flex-start;
}
.grasp-flex_center {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
}
.grasp-flex_between {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
}
.grasp-flex_around {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-around;
}
.grasp-flex_end {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: flex-end;
}
.grasp-flex {
  display: flex;
  flex-direction: row;
  align-items: stretch;
  justify-content: flex-start;
}
.grasp-flex_1 {
  flex: 1;
}
.grasp-head {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  margin: 0 auto;
  height: 76px;
  max-width: 1200px;
}
.grasp-head .btn {
  width: 104px;
  height: 34px;
  line-height: 1;
}
.grasp-head .btn + .btn {
  margin-left: 34px;
}
.grasp-nav {
  padding: 35px 0 29px;
  background: #f6f8fb;
}
.grasp-nav ul {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-around;
  align-items: flex-start;
  max-width: 1200px;
  margin: 0 auto;
}
.grasp-nav ul li p {
  line-height: 36px;
}
.grasp-nav ul li .title {
  font-size: 18px;
  color: #000;
}
.grasp-nav ul li .name {
  cursor: pointer;
}
.grasp-nav ul .er-code {
  text-align: center;
}
.grasp-fixed_btn {
  position: fixed;
  right: 1%;
  bottom: 20%;
  width: 40px;
  font-size: 24px;
  z-index: 1040;
}
.grasp-fixed_btn .btn-icon {
  display: block;
  width: 42px;
  height: 42px;
  margin-bottom: 2px;
  background-repeat: no-repeat;
  background-position: center center;
}
.grasp-fixed_btn .go-top {
  background: url('../images/goTop.png');
}
.grasp-fixed_btn .go-top:hover {
  background: url('../images/goTop_hover.png');
}
.grasp-fixed_btn .qq {
  background: url('../images/qq.png');
}
.grasp-fixed_btn .qq:hover {
  background: url('../images/qq_hover.png');
}
.grasp-fixed_btn .wechat {
  position: relative;
  background: url('../images/wechat.png');
}
.grasp-fixed_btn .wechat .erCode {
  position: absolute;
  display: none;
  top: -16px;
  right: calc(1% + 42px);
}
.grasp-fixed_btn .wechat:hover {
  background: url('../images/wechat_hover.png');
}
.grasp-fixed_btn .wechat:hover .erCode {
  display: block;
}
.grasp-fixed_btn .add-user {
  background: url('../images/user.png');
}
.grasp-fixed_btn .add-user:hover {
  background: url('../images/user_hover.png');
}
.grasp-footer {
  text-align: center;
  color: #a9a9a9;
  font-size: 12px;
  line-height: 80px;
}
.product .banner {
  width: 100%;
  height: 492px;
  background: url(../images/help/banner.svg) no-repeat center center;
  background-size: cover;
}
.product .banner_content {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  align-items: flex-start;
  height: 100%;
  max-width: 1200px;
  margin: 0 auto;
}
.product .banner_content .info {
  margin-right: 142px;
  color: #fff;
}
.product .banner_content .info h1 {
  margin-top: 187px;
  font-size: 36px;
  font-family: 'SourceHanSansCN-Bold';
}
.product .banner_content .info h1 span {
  margin-left: 9px;
  color: #4f72f6;
}
.product .banner_content .images {
  flex: 1;
  height: 100%;
  background: url(../images/help/banner-logo.svg) no-repeat center center;
}
.product .container {
  min-width: 1200px;
}
.product .container .nav {
  margin-bottom: 0 !important;
  border-bottom: 1px solid #e1e6f0;
}
.product .container .nav .nav-item .nav-link {
  position: relative;
  width: 148px;
  color: #5b456d;
  text-align: center;
  font-size: 16px;
  line-height: 30px;
}
.product .container .nav .nav-item .active {
  color: #278cff;
  background: none;
}
.product .container .nav .nav-item .active::after {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 148px;
  height: 2px;
  background-color: #278cff;
  content: ' ';
}
.product .container .tab-content .part1 {
  margin-top: 52px;
  text-align: center;
}
.product .container .tab-content .part1 img {
  margin-bottom: 52px;
}
.product .container .tab-content .part2 {
  margin: 20px 0 109px;
}
.product .container .tab-content .part2 .part2_search {
  width: 357px;
  float: right;
  margin-bottom: 18px;
}
.product .container .tab-content .part2 .part2_search .form-control {
  height: 36px;
  border-radius: 18px;
}
.product .container .tab-content .part2 .part2_container {
  clear: both;
  display: flex;
  flex-direction: row;
  align-items: stretch;
  justify-content: flex-start;
}
.product .container .tab-content .part2 .part2_container .side-nav {
  width: 281px;
  margin-right: 18px;
  text-align: center;
  font-size: 16px;
  border: none;
}
.product .container .tab-content .part2 .part2_container .side-nav .nav-link {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  position: relative;
  width: 100%;
  height: 45px;
  color: #6a5679;
  border: 1px solid #e1e6f0;
  border-left: none;
  border-radius: 0;
}
.product .container .tab-content .part2 .part2_container .side-nav .nav-link:not(:last-child) {
  border-bottom: none;
}
.product .container .tab-content .part2 .part2_container .side-nav .nav-link .sign {
  position: absolute;
  left: 59px;
  width: 6px;
  height: 6px;
  background-image: linear-gradient(262deg, #e6ebf4 0%, #c2d1f1 100%), linear-gradient(#278cff, #278cff);
  background-blend-mode: normal, normal;
  border-radius: 6px;
}
.product .container .tab-content .part2 .part2_container .side-nav .nav-link.active {
  position: relative;
  color: #278cff;
  background: #fff;
}
.product .container .tab-content .part2 .part2_container .side-nav .nav-link.active::after {
  position: absolute;
  top: 0;
  bottom: 0;
  right: 0;
  width: 3px;
  background: #278cff;
  content: ' ';
}
.product .container .tab-content .part2 .part2_container .side-nav .nav-link.active .sign {
  background-image: linear-gradient(262deg, #95b7f4 0%, #5d8ae6 100%), linear-gradient(#278cff, #278cff);
}
.product .container .tab-content .part2 .part2_container .tab-content {
  border: 1px solid #e1e7f0;
}
.product .container .tab-content .part2 .part2_container .tab-content .question-list {
  width: 900px;
  height: 100%;
  padding: 42px;
}
.product .container .tab-content .part2 .part2_container .tab-content .question-list li {
  height: 54px;
  font-size: 16px;
  line-height: 54px;
  color: #272727;
  border-bottom: 1px dashed #b6b6b6;
}
.product .container .tab-content .part3 {
  width: 1100px;
  margin: 65px auto;
}
.product .container .tab-content .part3 li {
  width: 284px;
  min-height: 40px;
  line-height: 40px;
  text-align: center;
  border: solid 1px #c0cbdf;
}
.product .container .tab-content .part3 li:not(:last-child) {
  border-right: none;
}
.product .container .tab-content .part3 .table-column {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
}
.product .container .tab-content .part3 .table-column li {
  flex: 1;
  color: #fff;
  font-size: 16px;
  background-color: #278cff;
  border-bottom: none;
}
.product .container .tab-content .part3 .table-body {
  color: #786886;
  font-size: 16px;
}
.product .container .tab-content .part3 .table-body .table-tr {
  display: flex;
  flex-direction: row;
  align-items: stretch;
  justify-content: flex-start;
}
.product .container .tab-content .part3 .table-body .table-tr:not(:last-child) > li {
  border-bottom: none;
}
.product .container .tab-content .part3 .table-body .table-tr .video-type {
  flex: 1;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  border-right: none;
}
.product .container .tab-content .part3 .table-body .table-tr .video-content {
  flex: 2;
  border: none;
}
.product .container .tab-content .part3 .table-body .table-tr .video-content li {
  border-bottom: none;
}
.product .container .tab-content .part3 .table-body .table-tr .video-content li a {
  color: #786886;
}
.product .container .tab-content .part3 .table-body .table-tr:last-child .video-content {
  border-bottom: 1px solid #c0cbdf;
}