doc: update docs/css.md
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docs/css.md
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docs/css.md
@ -1921,6 +1921,42 @@ ul > li:not(:last-child)::after {
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使列表项看起来像一个真实的逗号分隔列表,使用 `:not()` 伪类,最后一项不会添加逗号
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### 图片对齐不变形
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```css
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img {
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width: 200px;
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height: 200px;
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/** 确保图片按原始宽高比例进行缩放 */
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object-fit: cover;
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object-position: left top;
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transition: 1s;
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}
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img:hover {
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/** 指定图片显示的位置,结合鼠标移动+过渡动画 */
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object-position: right bottom;
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}
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```
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### 多行截断,展示省略号
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```css
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.clamp {
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overflow: hidden;
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display: -webkit-box;
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-webkit-line-clamp: 3;
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-webkit-box-orient: vertical;
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}
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```
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`html` 文本超过 3 行将被截断,显示省略号...
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```html
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<p class="clamp">
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展示多行文本,超过 3 行将被截断,显示省略号...
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</p>
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```
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另见
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---------
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