.header {
    height: 50px;
    width: 100%;
    position: fixed;
    left: 0;
    top: 0;
    right: 0;
    background: #fff;
    z-index: 9999;
    display: flex;
    justify-content: space-between;
    padding: 0 15px;
    align-items: center;
}
.back i {
    color: #333;
}
.back a {
    color: #333;
    font-size: 16px;
}
.header p {
    font-size: 18px;
    color: #000;
    font-weight: 600;
}