0 1 2 3 4 @charset "utf-8"; *{ margin:0; padding: 0; } .scroll { position: fixed; left: 20px; top: 20px; z-index: 100000; } #section1{ height:200vh; background: #F3EEE8; position: relative; z-index:6000; } #section2{ height:3000px; background: #000; position: relative; z-index:7000; } #section3{ height: 3000px; background: red; position: relative; z-index:4000; } #section4{ height: 4000px; backg..