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                            [TOC]


## 滾動指示器,頁面頂端顯示進度條

```
<style>
        .main {
            margin: 0;
            padding: 0;
            display: block;
            height: 30000px;
            text-align: center;
            line-height: 100px;
        }

        body {
            margin: 0;
            padding: 0;
            background: linear-gradient(to right top, #369 50%, #fff 50%);
            background-size: 100% calc(100% - 99vh);
        }

        body:before {
            content: '';
            position: fixed;
            top: 4px;
            bottom: 0;
            width: 100%;
            z-index: -1;
            background: #fff;
        }
    </style>

<div class="main">
    <h1>滾動鼠標</h1>
</div>
```
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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