先上图 看效果
<img src="/timg?image&quality=80&size=b9999_10000&sec=1603366090530&di=c577848925d530d810551eda33d2d57e&imgtype=0&src=http%3A%2F%%2F0418%2F1039568_043023301140_2.jpg" /><img class="img" src="/timg?image&quality=80&size=b9999_10000&sec=1603366090530&di=c577848925d530d810551eda33d2d57e&imgtype=0&src=http%3A%2F%%2F0418%2F1039568_043023301140_2.jpg" />
img {width: 400px;height: 400px;}.img {width: 400px;height: 400px;-webkit-filter: grayscale(100%);-moz-filter: grayscale(100%);-ms-filter: grayscale(100%);-o-filter: grayscale(100%);filter: grayscale(100%);filter: gray;}
