If you give the body a position: relative and the div a position: absolute , you can set the top property as a percentage, where top: 100% ... ... <看更多>
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If you give the body a position: relative and the div a position: absolute , you can set the top property as a percentage, where top: 100% ... ... <看更多>
IMPORTANT:Learn CSS Today Course: ... Learn CSS Position In 9 Minutes ... Top 10 Advanced CSS Responsive Design Concepts You Should Know. ... <看更多>
padding-top: 240px; z-index: 2; } #div3 { background-color: #fdd; padding: 40px 20px 20px; border: 1px dashed #900; position: absolute; ... <看更多>