HTML / CSS |从嵌套列表中删除Border Right

Question

我在StackOverflow上搜索但找不到这个答案。

如何让border-right仅影响主<li> s（即：“此处为边框 - ＆gt;”），而不影响嵌套<li> s（即：“无边框” - ＆GT;？“）

代码：

body {
  margin: 0;
  padding: 0;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  overflow: hidden;
}
div,
nav {
  display: block;
}
.main-header {
  border-bottom: 1px solid rgb(213, 213, 213);
}
.block {
  width: 840px;
  position: relative;
  display: block;
  margin: auto;
}
.main-header ul.nav {
  margin: auto;
  text-align: center;
  padding: 0 0 0 0;
  position: relative;
  color: #333;
  font-weight: bold;
  font-size: 10px;
  display: block;
  height: 45px;
}
#nav {
  z-index: 200;
  position: relative;
  overflow: visible;
}
.container {
  max-width: 940px;
  padding-left: 20px;
  padding-right: 20px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
}
.container:before,
.container:after {
  display: table;
  line-height: 0;
  content: "";
  width: 1px;
}
.container:after {
  clear: both;
}
.main-header .nav-outer {
  padding: 0;
  position: static;
}
.main-header nav > div > ul > li {
  vertical-align: top;
  display: inline-block;
  margin: 0px;
  line-height: 45px;
  border-right: 1px solid #993030;
}
.main-header nav > div > ul > li > ul {
  position: relative;
  padding: 0;
  width: inherit;
  background-color: beige;
}
.main-header .nav > li > ul > li {
  display: block;
}
.nav li:hover {
  background: #000;
  text-decoration-color: #fff;
  cursor: pointer;
}
.nav li:hover a {
  color: #fff;
}
.nav a {
  text-decoration: none;
  color: #333;
  display: block;
  padding: 0 2.083333333333vw;
}
.nav-home {
  border-left: 1px solid rgb(213, 213, 213);
}
ul.nav li.nav-home a {
  background: url(Images/nav-sprite.png) no-repeat center 14px;
  text-indent: 200%;
  white-space: nowrap;
  overflow: hidden;
  display: block;
  width: 20px;
}
ul.nav li.nav-home a:active {
  text-decoration: none;
  outline: 0;
  color: #333;
}
ul.nav li.nav-home a:active {
  text-decoration: none;
  font-size: 16px;
  color: #333;
  line-height: 45px;
}

<div class="main-header">
  <div class="container nav-outer">
    <nav id="nav">
      <div class="block">
        <ul class="nav">
          <li class="nav-home"><a href="/homepage.html">Home</a>

          </li>
          <li><a href="#">Border here -></a>

            <ul>
              <li>No border -></li>
              <li>No border -></li>
              <li>No border -></li>
              <li>No border -></li>
              <li>No border -></li>
              <li>No border -></li>
              <li>No border -></li>
              <li>No border -></li>
              <li>No border -></li>
            </ul>
          </li>
          <li><a href="#">Border here -></a>

          </li>
          <li><a href="#">Border here -></a>

          </li>
          <li><a href="#">Border here -></a>

          </li>
          <li><a href="#">Border here -></a>

          </li>
        </ul>
      </div>
    </nav>
  </div>
</div>

这里有新手！如果代码组织不当，请不要打败我：）

Answer 1

css中的>字符将使您的选择器仅针对直接后代。您希望定位nav类的直接后代，这些后代是li元素。我在下面编辑了你的CSS。

body {
  margin: 0;
  padding: 0;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  overflow: hidden;
}
div,
nav {
  display: block;
}
.main-header {
  border-bottom: 1px solid rgb(213, 213, 213);
}
.block {
  width: 840px;
  position: relative;
  display: block;
  margin: auto;
}
.main-header ul.nav {
  margin: auto;
  text-align: center;
  padding: 0 0 0 0;
  position: relative;
  color: #333;
  font-weight: bold;
  font-size: 10px;
  display: block;
  height: 45px;
}
#nav {
  z-index: 200;
  position: relative;
  overflow: visible;
}
.container {
  max-width: 940px;
  padding-left: 20px;
  padding-right: 20px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
}
.container:before,
.container:after {
  display: table;
  line-height: 0;
  content: "";
  width: 1px;
}
.container:after {
  clear: both;
}
.main-header .nav-outer {
  padding: 0;
  position: static;
}
.main-header nav > div > ul > li {
  vertical-align: top;
  display: inline-block;
  margin: 0px;
  line-height: 45px;
}
.main-header .nav > li > a {
  border-right: 1px solid #993030;
}
.main-header nav > div > ul > li > ul {
  position: relative;
  padding: 0;
  width: inherit;
  background-color: beige;
}
.main-header .nav > li > ul > li {
  display: block;
}
.nav li:hover {
  background: #000;
  text-decoration-color: #fff;
  cursor: pointer;
}
.nav li:hover a {
  color: #fff;
}
.nav a {
  text-decoration: none;
  color: #333;
  display: block;
  padding: 0 2.083333333333vw;
}
.nav-home {
  border-left: 1px solid rgb(213, 213, 213);
}
ul.nav li.nav-home a {
  background: url(Images/nav-sprite.png) no-repeat center 14px;
  text-indent: 200%;
  white-space: nowrap;
  overflow: hidden;
  display: block;
  width: 20px;
}
ul.nav li.nav-home a:active {
  text-decoration: none;
  outline: 0;
  color: #333;
}
ul.nav li.nav-home a:active {
  text-decoration: none;
  font-size: 16px;
  color: #333;
  line-height: 45px;
}