区域滚动可以设置为横向滚动吗？

可以的，区域滚动有横向的

原内容来自 https://segmentfault.com/q/1010000003490547  
在原基础上做了少量修改，避免当内容宽度小于容器宽度时，会出现横向滚动条。解决方法是：将横向滚动条溢出至容器外，保证横向滚动条不可见  

<div class="inc-scroll-landscape-container">  
    <div class="inc-scroll-landscape-content">  
        <ul>  
           <li class="active">a</li>  
            <li>b</li>  
           <li>c</li>  
            <li>e</li>  
            <li>f</li>  
            <li>g</li>  
            <li>h</li>  
        </ul>  
     </div>  
 </div>  

.inc-scroll-landscape-container { width: 100%; height: 50px; overflow: hidden; background-color: #FFF;}  
.inc-scroll-landscape-container > .inc-scroll-landscape-content {  
    padding-bottom: 100px; /* 当内容宽度小于容器宽度时，会出现横向滚动条。将横向滚动条溢出至容器外，保证横向滚动条不可见 */  
    white-space: nowrap;  
    overflow: hidden;  
    overflow-x: scroll; /* 1 */  
    -webkit-backface-visibility: hidden;  
    -webkit-perspective: 1000;  
    -webkit-overflow-scrolling: touch; /* 2 */  
    text-align: justify; /* 3 */  
    &::-webkit-scrollbar { display: none;}  
}  
.inc-scroll-landscape-container > .inc-scroll-landscape-content > ul {}  
.inc-scroll-landscape-container > .inc-scroll-landscape-content > ul > li { width: 60px; height: 50px; line-height: 50px;  
     position: relative; display: inline-block; text-align: center; font-size: 13px; color: #666; font-weight: bold;}  
.inc-scroll-landscape-container > .inc-scroll-landscape-content > ul > li.active:after { position: absolute;  
    right: 16px; bottom: 8px; left: 16px; height: 5px;  
    background-color: #DD524D; content: ' '; transform: scaleY(0.5); -webkit-transform: scaleY(0.5);}