html - CSS - 封面图像渐变

Question

我正在努力在封面图片上添加一个渐变层。我不明白为什么会这样。

看看下面的代码。

来源:Wallpaper

例如:

header {
  position: relative;
  height: 300px;
  background-repeat: no-repeat;
  background-position: center bottom;
  background-image: url('http://wallpaperlatest.com/wp-content/uploads/latest-wallpapers-in-full-hd-definition.jpg');
  background-size: cover;
  border-bottom-left-radius: 50%;
  border-bottom-right-radius: 50%;
}

h1 {
  margin: 0;
  padding: 100px 0;
  font: 44px "Arial";
  text-align: center;
}

header h1 {
  color: white;
}

<header>
  <h1>Header Content | Source: http://wallpaperlatest.com</h1>
</header>

<section>
  <h1>Section Content | Source: http://wallpaperlatest.com/</h1>
</section>

Answer 1

试试这个:

header {
  position: relative;
  height: 300px;
  background-repeat: no-repeat;
  background-position: center bottom;
  background-image: linear-gradient(to bottom right, rgba(0, 47, 75, .8), rgba(220, 66, 37, .8)), url('http://wallpaperlatest.com/wp-content/uploads/latest-wallpapers-in-full-hd-definition.jpg');
  background-size: cover;
  border-bottom-left-radius: 50%;
  border-bottom-right-radius: 50%;
}

h1 {
  margin: 0;
  padding: 100px 0;
  font: 44px "Arial";
  text-align: center;
}

header h1 {
  color: white;
}

<header>
  <h1>Header Content | Source: http://wallpaperlatest.com</h1>
</header>

<section>
  <h1>Section Content | Source: http://wallpaperlatest.com/</h1>
</section>