iview/src/styles/mixins/select.less

.select-item(@size-class, @item-class) {
    .@{item-class} {
        margin: 0;
        padding: 7px 16px;
        clear: both;
        color: @text-color;
        font-size: @font-size-small !important;
        white-space: nowrap;
        list-style: none;
        cursor: pointer;
        transition: background @transition-time @ease-in-out;

        &:hover{
            background: @background-color-select-hover;
        }

        &-focus {
            background: @background-color-select-hover;
        }

        &-disabled {
            color: @btn-disable-color;
            cursor: @cursor-disabled;

            &:hover {
                color: @btn-disable-color;
                background-color: #fff;
                cursor: @cursor-disabled;
            }
        }

        &-selected ,&-selected:hover{
            color: #fff;
            background: @selected-color;
        }

        &-selected&-focus {
            background: shade(@selected-color, 10%);
        }
    }

    .@{size-class}-large .@{item-class} {
        padding: 7px 16px 8px;
        font-size: @font-size-base !important;
    }
}