.scrollable {
    overflow-x: hidden;
    overflow-y: scroll;
}
/* 直接隐藏滚动条 */
/*.scrollable::-webkit-scrollbar {
    display: none;
}*/
.scrollable::-webkit-scrollbar {
    width: 10px;
}
.scrollable::-webkit-scrollbar-track {
    background-color: #f1f1f1;
    opacity: 0.2;
}
.scrollable::-webkit-scrollbar-thumb {
    background-color: #888;
    border-radius: 5px;
}
.scrollable::-webkit-scrollbar-thumb:hover {
    background-color: #555;
}