.z-dropdown {
    display: inline-block;
    margin: 5px;
}

.btn-dropdown {
    outline: 0;
    display: inline-flex;
    align-items: center;
    justify-content: space-between;
    border: 0;
    border-radius: 2px;
    box-sizing: border-box;
    letter-spacing: 1.2px;
    overflow: hidden;
    cursor: pointer;
}

.btn-dropdown:focus~.sub-dropdown,
.btn-dropdown:active~.sub-dropdown,
.hover:hover~.sub-dropdown,
.hover+.sub-dropdown:hover,
.sub-dropdown:active {
    -webkit-transform: translate(0, 7px);
    transform: translate(0, 7px);
    opacity: 1;
    visibility: visible;
}


.sub-dropdown {
    opacity: 0;
    visibility: hidden;
    position: absolute;
    background: #FFFFFF;
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    text-align: left;
    transition: 0.3s ease;
    margin: 0;
    width: 100px;
    list-style: none;
    padding: 0 10px;
    z-index: 1;
    line-height: 26px;
}

.sub-dropdown:before {
    /* 箭头 */
    content: '';
    position: absolute;
    top: -6px;
    left: 20px;
    width: 0;
    height: 0;
    box-shadow: 2px -2px 6px rgba(0, 0, 0, 0.05);
    border-top: 6px solid #FFFFFF;
    border-right: 6px solid #FFFFFF;
    border-bottom: 6px solid transparent;
    border-left: 6px solid transparent;
    -webkit-transform: rotate(-45deg);
    transform: rotate(-45deg);
    mix-blend-mode: multiple;
}

.sub-dropdown li {
    z-index: 2;
    position: relative;
    background: #FFFFFF;
    color: #666;
}

.sub-dropdown li:hover {
    color: #5380F7;
}

.sub-dropdown li:first-child {
    border-radius: 4px 4px 0 0;
}

.sub-dropdown li:last-child {
    border-radius: 0 0 4px 4px;
}

.sub-dropdown li:last-child a {
    border-bottom: 0;
}

.sub-dropdown a {
    z-index: 3;
    display: block;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    padding: 5px 0;
    color: inherit;
    font-size: 10px;
    text-decoration: none;
}