tabs 滑动效果

https://www.zhangxinxu.com/wordpress/2020/07/css-var-improve-components/

伪类选择器

https://blog.csdn.net/weixin_44296929/article/details/103710716

css var（）

https://blog.csdn.net/weixin_44867717/article/details/124041758

获取颜色

var declaration = document.styleSheets[0].cssRules[0].style;

var propvalue = declaration.getPropertyValue("color");

CSS3混合模式mix-blend-mode简介

混合模式

mix-blend-mode: normal;          //正常
mix-blend-mode: multiply;        //正片叠底
mix-blend-mode: screen;          //滤色
mix-blend-mode: overlay;         //叠加
mix-blend-mode: darken;          //变暗
mix-blend-mode: lighten;         //变亮
mix-blend-mode: color-dodge;     //颜色减淡
mix-blend-mode: color-burn;      //颜色加深
mix-blend-mode: hard-light;      //强光
mix-blend-mode: soft-light;      //柔光
mix-blend-mode: difference;      //差值
mix-blend-mode: exclusion;       //排除
mix-blend-mode: hue;             //色相
mix-blend-mode: saturation;      //饱和度
mix-blend-mode: color;           //颜色
mix-blend-mode: luminosity;      //亮度