.header3 {
    position: fixed;
    left: 0;
    right: 0;
    top: 0;
    z-index: 99;
    width: 100%;
    min-width: 14.4rem;
    background: #FFFFFF;
    box-shadow: 2px 5px 13px 5px rgba(119, 119, 119, 0.1);
}
.header3 .hd-main {
    display: flex;
    justify-content: space-between;
    flex-direction: column;
    width: 100%;
    margin: 0 auto;
}

@media screen and (max-width: 900px) {
    .header3 {
        height: 200px;
        min-width: 375px;
        z-index: 0;
        background: linear-gradient(180deg, #317AF2 0%, #2770e8 24%, #F5F5F9 100%);
        margin-bottom: -124px;
        position: inherit;
        padding-top: 10px;
    }
    .header3 .hd-main {
        display: flex;
        justify-content: space-between;
        flex-direction: row;
        align-items: center;
        width: 100%;
        height: 70px;
        padding: 0 20px;
    }
    .mob-logo {
        height: 40px;
    }
    .mob-logo img {
        height: 100%;
        width: auto;
    }
    .mob-btn {
        width: 26px;
        height: 18px;
        display: flex;
        flex-direction: column;
        justify-content: space-between;
    }
    .mob-btn span {
        display: block;
        width: 100%;
        height: 2px;
        background: #ffffff;
    }
    .mob-user {
        display: flex;
        flex-direction: column;
        align-items: end;
    }
    .mob-login-btn, .mob-user-info {
        margin-bottom: 10px;
    }
    .mob-login-btn {
        font-size: 14px;
        color: #3C77F9;
        padding: 5px 10px;
        text-align: center;
        background: #fff;
        border-radius: 2px;
    }
    .mob-logout-btn {
        font-size: 12px;
        color: #f56c6c;
        padding: 3px;
        text-align: center;
        background: #fef0f0;
        border-radius: 2px;
        margin-left: 5px;
    }
    .mob-user-info {
        display: flex;
        align-items: center;
        white-space: nowrap;
    }
    .mob-user-info .user-name {
        color: #fff;
        font-size: 12px;
    }
}