.help_center {
    height: 100%;
    width: 100%
}

.help_center .head {
    border-bottom: 1px solid #dcdfe6;
    height: 64px;
    justify-content: space-between;
    padding: 0 24px
}

.help_center .head,.help_center .head .logo {
    align-items: center;
    display: flex
}

.help_center .head .logo span {
    border-left: 1px solid #dcdfe6;
    color: #0256ff;
    font-size: 16px;
    margin-left: 16px;
    padding-bottom: 4px;
    padding-left: 16px;
    position: relative
}

.help_center .head .logo span:after {
    background: #2468f2;
    border-radius: 2px;
    bottom: 0;
    content: "";
    height: 4px;
    left: 50%;
    margin-left: 8px;
    position: absolute;
    transform: translate(-50%);
    width: 16px
}

.help_center .head .input-but {
    background: #fff;
    border: 1px solid #dcdfe6;
    border-radius: 20px;
    display: flex;
    height: 40px;
    justify-content: space-between;
    overflow: hidden;
    width: 520px
}

.help_center .head .input-but input {
    flex: 1;
    padding: 0 8px
}

.help_center .head .input-but button {
    background: #0256ff;
    border-radius: 20px;
    color: #fff;
    height: 40px;
    width: 80px
}

.help_center .main {
    display: flex;
    height: calc(100% - 64px);
    width: 100%
}

.help_center .main .nan {
    background: #f7f8f9;
    border-radius: 0;
    height: 100%;
    padding: 24px;
    width: 260px
}

.help_center .main .nan ul li {
    font-size: 14px
}

.help_center .main .nan ul li img {
    height: 16px
}

.help_center .main .nan ul li span {
    cursor: pointer;
    display: block;
    line-height: 24px;
    padding: 12px 16px
}

.help_center .main .nan ul li ul {
    margin-left: 16px
}

.help_center .main .nan ul li ul li span {
    line-height: 16px
}

.help_center .main .nan ul .nan-item .title {
    align-items: center;
    color: #1a1a1a;
    display: flex
}

.help_center .main .nan ul .active .title {
    background: #eef4ff;
    border-radius: 8px;
    color: #0256ff;
    transition: all .3s
}

.help_center .main .main-content {
    align-items: center;
    display: flex;
    flex-direction: column;
    margin: 0 auto;
    padding: 24px;
    width: 920px;
}

.help_center .main .main-content .content-nav {
    align-items: center;
    color: #1a1a1a;
    display: flex;
    justify-content: space-between;
    margin-bottom: 24px;
    width: 100%
}

.help_center .main .main-content .content-nav em {
    color: #737c8e;
    cursor: pointer;
    margin-right: 4px
}

.help_center .main .main-content .content-title {
    align-items: center;
    display: flex;
    font-size: 36px;
    margin-bottom: 24px;
    width: 100%
}
.help_center .main .main-content .content-title-3 {
    align-items: center;
    display: flex;
    font-size: 36px;
    margin-bottom: 24px;
    width: 100%
}
.help_center .main .main-content .content-title img {
    margin-right: 8px
}
.help_center .main .main-content .content-title-2 {
    align-items: center;
    display: flex;
    font-size: 36px;
    margin-bottom: 24px;
    width: 100%
}

.help_center .main .main-content .content-main {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    width: 100%
}

.help_center .main .main-content .content-main li {
    align-items: center;
    border: 1px solid #dcdfe6;
    border-radius: 12px;
    cursor: pointer;
    display: flex;
    margin-bottom: 32px;
    padding: 24px 20px;
    width: calc(50% - 16px)
}

.help_center .main .main-content .content-main li div {
    align-items: center;
    display: flex;
    flex: 1;
    justify-content: space-between;
}
.help_center .main .main-content .content-main li .brand{
  margin-left:16px;
}

.help_center .main .main-content .content-main li div img {
    height: 10px
}

.help_center .main .main-content .content-main li div p span {
    color: #1a1a1a;
    display: block;
    font-size: 16px
}

.help_center .main .main-content .content-main li div p span:last-child {
    color: #737c8e;
    font-size: 14px
}

.help_center .main .main-content .content-main-2 {
    width: 100%;
    margin-bottom: 100px;
}

.help_center .main .main-content .content-main-2 li {
    align-items: center;
    border-bottom: 1px solid #dcdfe6;
    cursor: pointer;
    display: flex;
    padding: 24px 20px 20px 0;
}

.help_center .main .main-content .content-main-2 li div {
    align-items: center;
    display: flex;
    flex: 1;
    justify-content: space-between;
}

.help_center .main .main-content .content-main-2 li div img {
    height: 10px
}

.help_center .main .main-content .content-main-2 li div p span {
    color: #1a1a1a;
    display: block;
    font-size: 16px
}

.help_center .main .main-content .content-main-2 li div p span:last-child {
    color: #737c8e;
    font-size: 14px
}


.help_center .main .main-content .content-main-3 {
    width: 100%;
    margin-bottom: 100px;
}

.help_center .main .main-content .content-main-3 li {
    align-items: center;
    border-bottom: 1px solid #dcdfe6;
    cursor: pointer;
    display: flex;
    padding: 24px 20px 20px 0;
}

.help_center .main .main-content .content-main-3 li div {
    align-items: center;
    display: flex;
    flex: 1;
    justify-content: space-between;
    margin-left: 16px
}

.help_center .main .main-content .content-main-3 li div img {
    height: 10px
}

.help_center .main .main-content .content-main-3 li div p span {
    color: #1a1a1a;
    display: block;
    font-size: 16px
}

.help_center .main .main-content .content-main-3 li div p span:last-child {
    color: #737c8e;
    font-size: 14px
}
.help_center .main .main-content .content-main-3 article{
  line-height:60px;
}