CSS a 链接的默认样式应用

CSS

a:link {
  text-decoration: none;
  color: #7f7f7f
}

a:visited {
  text-decoration: none;
  color: #7f7f7f
}

a:hover {
  text-decoration: none;
  color: #007bffad;
}

a:active {
  text-decoration: none;
  color: #007bff;
}

HTML

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