使用 CSS3 在 HTML 表格上应用指示器

Question

我正在使用 html 构建一个表格，

此表用作导航栏，我正在尝试添加 css3 动画以向导航栏添加创意，因此我使用了此代码，但我无法弄清楚为什么动画会部分出现。基本上，一旦您将孩子悬停，动画应该显示 2 个点，一个在不同颜色的上方，但'li child'表格中每个点仅出现一个且颜色相同。

如何在菜单中悬停子项时添加 2 点动画？每个孩子都会表现出不同的颜色。

CodePen https://codepen.io/yotking789/pen/JjoJYvE

html, body
{
    height: 100%;
}

body {
  margin: 0;
  padding: 0;
}
.logo {
  float: left;
}
/* ~~ Top Navigation Bar ~~ */

#navigation-container {
  width: 1200px;
  margin: 0 auto;
  height: 70px;
}

.navigation-bar {
  background-color: #352d2f;
  height: 70px;
  width: 100%;
  text-align:center;
}
.navigation-bar img{
float:left;
margin-top: -65px
}
.navigation-bar ul {
  padding: 0px;
  margin: 0px;
  text-align: center;
  display:inline-block;
  vertical-align:top;
  transform: translate(0);
}

.navigation-bar li {
  list-style-type: none;
  padding: 0px;
  height: 24px;
  margin-top: 4px;
  margin-bottom: 4px;
  display: inline;
}

.navigation-bar li a {
  display: inline;
  color: #949494;
  text-decoration: none;
  font-family: Verdana, Geneva, Tahoma, sans-serif;
  font-weight: bold;
  padding: 10px 20px;
  line-height: 70px;
  transition: 0.2s ease color;
}

#menu {
  float: right;
}

ul li a:before, ul li a:after
{
    content: "";
    position: absolute;
    border-radius: 50%;
    transform: scale(0);
    transition: 0.2s ease transform;
}

ul li a:before
{
    top: 0;
    left: 10px;
    width: 6px;
    height: 6px;
}

ul li a:after
{
    top: 5px;
    left: 18px;
    width: 4px;
    height: 4px
}

ul li a:nth-child(1):before
{
    background-color: yellow;
}

ul li a:nth-child(1):after
{
    background-color: red;
}

ul li a:nth-child(2):before
{
    background-color: #00e2ff;
}

ul li a:nth-child(2):after
{
    background-color: #89ff00;
}

ul li a:nth-child(3):before
{
    background-color: purple;
}

ul li a:nth-child(3):after
{
    background-color: palevioletred;
}
ul li a:nth-child(4):before
{
    background-color: Grey;
}

ul li a:nth-child(4):after
{
    background-color: white;
}

ul li a:hover
{
    color: #fff;
}

ul li a:hover:before, nav a:hover:after
{
    transform: scale(1);
}

ul li a:nth-child(1):hover ~ #indicator
{
    background: linear-gradient(130deg, yellow, red);
}

ul li a:nth-child(2):hover ~ #indicator
{
    left: 34%;
    background: linear-gradient(130deg, #00e2ff, #89ff00);
}

ul li a:nth-child(3):hover ~ #indicator
{
    left: 70%;
    background: linear-gradient(130deg, purple, palevioletred);
}

<div class="navigation-bar">


<div id="navigation-container">

  <img src="images/logo.png">

  <ul>
    <li><a href="#">Home</a></li>
    <li><a href="#">Projects</a></li>
    <li><a href="#">About</a></li>
    <li><a href="#">Services</a></li>
    <li><a href="#">Get in Touch</a></li>
  </ul>
</div>
</div>

Answer 1

检查以下代码，nth-child 应该是 'li' 而不是 'a'，

html, body
{
    height: 100%;
}

body {
  margin: 0;
  padding: 0;
}
.logo {
  float: left;
}
/* ~~ Top Navigation Bar ~~ */

#navigation-container {
  width: 1200px;
  margin: 0 auto;
  height: 70px;
  position: relative;
}

.navigation-bar {
  background-color: #352d2f;
  height: 70px;
  width: 100%;
  text-align:center;
}
.navigation-bar img{
float:left;
margin-top: -65px
}
.navigation-bar ul {
  padding: 0px;
  margin: 0px;
  text-align: center;
  display:inline-block;
  vertical-align:top;
  transform: translate(0);
}

.navigation-bar li {
  list-style-type: none;
  padding: 0px;
  height: 24px;
  margin-top: 4px;
  margin-bottom: 4px;
  display: inline;
}

.navigation-bar li a {
  display: inline;
  color: #949494;
  text-decoration: none;
  font-family: Verdana, Geneva, Tahoma, sans-serif;
  font-weight: bold;
  padding: 10px 20px;
  line-height: 70px;
  transition: 0.2s ease color;
  position:relative;
}

#menu {
  float: right;
}

ul li a:before, ul li a:after
{
    content: "";
    position: absolute;
    border-radius: 50%;
    transform: scale(0);
    transition: 0.2s ease transform;
}

ul li a:before
{
    top: 0;
    left: 10px;
    width: 6px;
    height: 6px;
}

ul li a:after
{
    top: 5px;
    left: 18px;
    width: 4px;
    height: 4px
}

ul li:nth-child(1) a:before
{
    background-color: yellow;
}

ul li:nth-child(1) a:after
{
    background-color: red;
}

ul li:nth-child(2) a:before
{
    background-color: #00e2ff;
}

ul li:nth-child(2) a:after
{
    background-color: #89ff00;
}

ul li:nth-child(3) a:before
{
    background-color: purple;
}

ul li:nth-child(3) a:after
{
    background-color: palevioletred;
}
ul li:nth-child(4) a:before
{
    background-color: Grey;
}

ul li:nth-child(4) a:after
{
    background-color: white;
}

ul li a:hover
{
    color: #fff;
}

ul li a:hover:before, ul li a:hover:after
{
    transform: scale(1);
}

ul li:nth-child(1) a:hover ~ #indicator
{
    background: linear-gradient(130deg, yellow, red);
}

ul li:nth-child(2) a:hover ~ #indicator
{
    left: 34%;
    background: linear-gradient(130deg, #00e2ff, #89ff00);
}

ul li:nth-child(3) a:hover ~ #indicator
{
    left: 70%;
    background: linear-gradient(130deg, purple, palevioletred);
}

<div class="navigation-bar">


<div id="navigation-container">

  <img src="images/logo.png">

  <ul>
    <li><a href="#">Home</a></li>
    <li><a href="#">Projects</a></li>
    <li><a href="#">About</a></li>
    <li><a href="#">Services</a></li>
    <li><a href="#">Get in Touch</a></li>
  </ul>
</div>
</div>