CSS3 两个方向的线性渐变

Question

我的网站上有一个 header，目前使用线性渐变从一种颜色移动到另一种颜色。这是 CSS:

#top-header {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    z-index: 99999;
    /* FF3.6+ */
    background: -webkit-gradient(linear, left top, right top, color-stop(100%, #be2e26), color-stop(20%, #be2e26), color-stop(20%, rgba(22, 22, 22, 0)), color-stop(20%, rgba(22, 22, 22, 0)));
    /* Chrome,Safari4+ */
    background: -webkit-linear-gradient(left, #be2e26 100%, #be2e26 40%, rgba(22, 22, 22, 100) 100%, rgba(22, 22, 22, 100) 100%);
    /* Chrome10+,Safari5.1+ */
    /* Opera 11.10+ */
    /* IE10+ */
    background: linear-gradient(to right, #be2e26 30%, #be2e26 20%, rgba(22, 22, 22, 0) 50%, rgba(22, 22, 22, 0) 100%);
    /* W3C */
    filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#be2e26', endColorstr='#be2e26', GradientType=1);
    /* IE6-9 */
    -webkit-transition: all 0.3s;
    transition: all 0.3s;
}

它从左边开始，向右边稍微改变颜色。我想同时从右边做同样的事情。我试图包括以下内容，但它只保留了两行之一：

background: linear-gradient(to right, #be2e26 30%, #be2e26 20%, rgba(22, 22, 22, 0) 50%, rgba(22, 22, 22, 0) 100%);
background: linear-gradient(to left, #be2e26 30%, #be2e26 20%, rgba(22, 22, 22, 0) 50%, rgba(22, 22, 22, 0) 100%);

它只保留第二个。知道如何解决这个问题吗？

Answer 1

您可以添加更多 linear-gradient，方法是用逗号分隔 ,。

background: <linear-gradient>, <linear-gradient>,...

#top-header {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 100px;
  z-index: 99999;
  background: -webkit-gradient(linear, left top, right top, color-stop(100%, #be2e26), color-stop(20%, #be2e26), color-stop(20%, rgba(22, 22, 22, 0)), color-stop(20%, rgba(22, 22, 22, 0))), -webkit-gradient(linear, right top, top top, color-stop(100%, #be2e26), color-stop(20%, #be2e26), color-stop(20%, rgba(22, 22, 22, 0)), color-stop(20%, rgba(22, 22, 22, 0)));
  background: -webkit-linear-gradient(left, #be2e26 100%, #be2e26 40%, rgba(22, 22, 22, 100) 100%, rgba(22, 22, 22, 100) 100%), linear-gradient(to left, #be2e26 30%, #be2e26 20%, rgba(22, 22, 22, 0) 50%, rgba(22, 22, 22, 0) 100%);
  background: linear-gradient(to right, #be2e26 30%, #be2e26 20%, rgba(22, 22, 22, 0) 50%, rgba(22, 22, 22, 0) 100%), linear-gradient(to left, #be2e26 30%, #be2e26 20%, rgba(22, 22, 22, 0) 50%, rgba(22, 22, 22, 0) 100%);
  filter: progid: DXImageTransform.Microsoft.gradient(startColorstr='#be2e26', endColorstr='#be2e26', GradientType=1);
  -webkit-transition: all 0.3s;
  transition: all 0.3s;
}

<header id="top-header"></header>

CSS3 两个方向的线性渐变

CSS3 with linear gradient for two directions

css

linear-gradients