html - 如何让这些 id 标签的样式正确？

Question

我有一个包含多个页面、关于页面、联系页面等的网站模板。

每个页面顶部的图片容器都有一个id标签#subheader。所以它分布在所有页面中。我想为每个页面更改照片，所以我复制并粘贴了 #id 标签的 css，并为每个页面稍微更改了标签。我希望只更改每个网址的网址，并更改标签名称，这样我就可以相应地更改 html。

问题是，后续的 Id 标签总是搞砸图像。它使整个结构乱七八糟。但是当我将 url 分配给原始类时，照片效果很好。

我在这里错过了什么？

  #subheader {
  padding-bottom: 70px;
  background: #222;
  background: url(file:///Users/Nineborn/Desktop/New%20LW%20Construction%20Site/Services.jpg)top fixed;
  background-size: cover;
    background-repeat: no-repeat;

    }

    #subheader2 {
  padding-bottom: 70px;
  background: #222;
  background: url(file:///Users/Nineborn/Desktop/New%20LW%20Construction%20Site/Architect.jpg)top fixed;
  background-size: cover;
    background-repeat: no-repeat;
}

#subheader3 {
  padding-bottom: 70px;
  background: #222;
  background: url(file:///Users/Nineborn/Desktop/New%20LW%20Construction%20Site/Architect.jpg)top fixed;
  background-size: cover;
    background-repeat: no-repeat;
}

#subheader2: 原始#subheader:

这是#subheader 标签的完整 CSS。

    /* subheader */
#subheader {
  padding-bottom: 70px;
  background: #222;
  background: url(file:///Users/Nineborn/Desktop/New%20LW%20Construction%20Site/Services.jpg)top fixed;
  background-size: cover;
    background-repeat: no-repeat;

}

#subheader h1 {
  color: #eceff3;
  text-align: center;
  margin-top: 40px;
  font-size: 32px;
  font-weight: 00;
  letter-spacing: 1px;
  text-transform: uppercase;
  text-shadow: 2px 2px 2px black;
}
#subheader span {
  letter-spacing: 2px;
  display: inline-block;
  font-size: 15px;
  margin-top: 88px;
  color: #fff;
}
#subheader .subdetail {
  font-size: 11px;
  letter-spacing: 2px;
  text-align: center;
  margin-top: 10px;
  text-transform: uppercase;
  color: #777;
  padding-left:0px !important;
}
#subheader .subdetail li {
  display: inline-block;
  color: #fff;
  margin:0;
  text-shadow: 2px 2px 6px black;
  font-weight: 700;
}
#subheader .subdetail li a {
  color: #ff6600;
}
#subheader .subdetail li.sep {
  margin-right: 20px;
}
/* subheader end */

Answer 1

这个:

#subheader {
  padding-bottom: 70px;
  background: #222;
  background: url(file:///Users/Nineborn/Desktop/New%20LW%20Construction%20Site/Services.jpg)top fixed;
  background-size: cover;
  background-repeat: no-repeat;
}

#subheader2 {
  padding-bottom: 70px;
  background: #222;
  background: url(file:///Users/Nineborn/Desktop/New%20LW%20Construction%20Site/Architect.jpg)top fixed;
  background-size: cover;
  background-repeat: no-repeat;
}

#subheader3 {
  padding-bottom: 70px;
  background: #222;
  background: url(file:///Users/Nineborn/Desktop/New%20LW%20Construction%20Site/Architect.jpg)top fixed;
  background-size: cover;
  background-repeat: no-repeat;
}

可以简化为:

.subheader {
  padding-bottom: 70px;
  background-color: #222;
  background-position: top left;
  background-attachment: fixed;
  background-size: cover;
  background-repeat: no-repeat;
}

.subheader.services {
  background-image: url(file:///Users/Nineborn/Desktop/New%20LW%20Construction%20Site/Services.jpg);
}

/* H1s specific to services */
.subheader.services h1 {
  …
}

.subheader.architect {
  background-image: url(file:///Users/Nineborn/Desktop/New%20LW%20Construction%20Site/Architect.jpg);
}

/* H1s specific to architect */
.subheader.architect h1 {
  …
}

HTML

<div class="subheader services">
  <h1>…</h1>
</div>
<div class="subheader architect">
  <h1>…</h1>
</div>