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html - 神秘 margin ？

我用CSS和PHP制作了一个网站，每个链接之间的页眉看起来有大约2px的边距。
我自己并没有定义这个边界，也找不到问题的原因。
我可以通过增加2倍的负边际来解决这个问题，但我觉得这并不能真正解决问题，只是掩盖了它。
链接是内联块的，在它们互相刷新之前，它们是内联的，与我拥有的“Leader Board”div。
html - 神秘 margin ？-LMLPHP

html,
body {
  margin: 0;
  padding: 0;
  font-family: "Lucida Sans Unicode", "Lucida Grande", sans-serif;
  min-height: 100%;
}

h1 {
  font-size: 22px;
  margin: 0px;
}

h2 {
  padding: 5px;
  margin: 0px;
}

h3 {
  padding: 5px;
  margin: 0px;
}

p {
  margin: 0px;
  padding: 5px;
}

#wrapper {
  position: relative;
  min-height: 100%;
  background-color: #eee;
  background-size: cover;
}

#header {
  padding: 0px 50px 0px 0px;
  margin: 0;
  position: fixed;
  width: 100%;
  height: 90px;
  background-color: #ffbb00;
  text-align: right;
  line-height: 90px;
}

#header h1 {
  padding: 0px 0px 0px 5px;
  margin: 0;
  float: left;
  text-align: center;
  display: inline-block;
  line-height: 90px;
  font-size: 80px;
  color: #00a1ff;
  font-style: italic;
  text-transform: uppercase;
}

#header a {
  padding: 0px 25px 0px 25px;
  margin: 0;
  transition: background .5s;
  display: inline-block;
  box-sizing: border-box;
  width: auto;
  height: 100%;
  text-decoration: none;
  text-align: center;
  line-height: 90px;
  font-size: 25px;
  letter-spacing: 4px;
  color: #fff;
  text-transform: uppercase;
}

#header a#selected {
  background: #ff9f00;
  cursor: default
}

#header a:hover {
  transition: background .5s;
  background: #ffaa00
}

#LeaderBoard {
  position: fixed;
  margin-top: 90px;
  right: 0px;
  float: right;
  width: 492px;
  height: 100%;
  background-color: #FFEE77;
  padding: 0px;
  z-index: 9;
}

#LeaderBoardHead {
  background-color: #ffb233;
  height: 65px;
  line-height: 65px;
  width: 100%;
  margin-top: 0px;
}

#LeaderBoardHead h2 {
  font-family: sans-serif;
  color: #ffffff;
  padding: 0 0 0 0;
  font-size: 50;
  text-align: center;
}

#welcome {
  position: relative;
  margin-top: 180px;
  margin-right: 45%;
  margin-left: 5%;
  padding: 0px;
  float: right;
  width: auto;
  height: auto;
  background-color: ;
  z-index: 1;
}

#welcome h2 {
  font-size: 50;
  font-family: sans-serif;
  font-style: italic;
  color: #00a1ff;
}

#welcome h3 {
  color: #00a1ff;
  font-size: 22;
}

#welcome p {
  color: #00a1ff;
  font-size: 18;
}

<html>

<head>

  <title>Flash Crash</title>
  <link rel="shortcut icon" href="../assets/favicon.png">
  <meta name="viewport" content="width=device-width">
  <link rel="stylesheet" type="text/css" href="../css/stylesheet.css">

  <meta name="description" content="Flash Crash" />
  <meta name="viewport" content="width=device-width" />

</head>

<body>
  <div id="wrapper">
    <div id="header">

      <h1>Flash Crash</h1>

      <a id="selected" href="../index.php" hreflang="en-gb">Home</a> <a href="../login.php" hreflang="en-gb">Login</a> <a href="../feedback.php" hreflang="en-gb">Feedback</a> </div>
    <link rel="stylesheet" type="text/css" href="../css/LeaderBoard.css" />

    <div id="LeaderBoard">

      <div id="LeaderBoardHead">
        <h2>Leader Board</h2>
      </div>

      <div id="LeaderBoardContent">

      </div>

    </div>
    <link rel="stylesheet" type="text/css" href="../css/welcome.css" />

    <div id="welcome">
      <h2>Welcome to Flash Crash!</h2>
      <h3>The Online Flash Card Crash Course for Computer Science</h3>
      <p>Flash Crash is a competitive online revision tool for computing students. <br> compete against your class mates by compleeting randomly generated quizzes <br> to earn points and unlock new editing permissions on the site!
      </p>
    </div>
  </div>
</body>

</html>

这是我的网站，你可以自己看问题：
jakehowell.me
非常感谢您的帮助，谢谢！

最佳答案

菜单a标记之间有空格。如果你移除这些，它会按预期工作。

html,
body {
  margin: 0;
  padding: 0;
  font-family: "Lucida Sans Unicode", "Lucida Grande", sans-serif;
  min-height: 100%;
}

h1 {
  font-size: 22px;
  margin: 0px;
}

h2 {
  padding: 5px;
  margin: 0px;
}

h3 {
  padding: 5px;
  margin: 0px;
}

p {
  margin: 0px;
  padding: 5px;
}

#wrapper {
  position: relative;
  min-height: 100%;
  background-color: #eee;
  background-size: cover;
}

#header {
  padding: 0px 50px 0px 0px;
  margin: 0;
  position: fixed;
  width: 100%;
  height: 90px;
  background-color: #ffbb00;
  text-align: right;
  line-height: 90px;
}

#header h1 {
  padding: 0px 0px 0px 5px;
  margin: 0;
  float: left;
  text-align: center;
  display: inline-block;
  line-height: 90px;
  font-size: 80px;
  color: #00a1ff;
  font-style: italic;
  text-transform: uppercase;
}

#header a {
  padding: 0px 25px 0px 25px;
  margin: 0;
  transition: background .5s;
  display: inline-block;
  box-sizing: border-box;
  width: auto;
  height: 100%;
  text-decoration: none;
  text-align: center;
  line-height: 90px;
  font-size: 25px;
  letter-spacing: 4px;
  color: #fff;
  text-transform: uppercase;
}

#header a#selected {
  background: #ff9f00;
  cursor: default
}

#header a:hover {
  transition: background .5s;
  background: #ffaa00
}

#LeaderBoard {
  position: fixed;
  margin-top: 90px;
  right: 0px;
  float: right;
  width: 492px;
  height: 100%;
  background-color: #FFEE77;
  padding: 0px;
  z-index: 9;
}

#LeaderBoardHead {
  background-color: #ffb233;
  height: 65px;
  line-height: 65px;
  width: 100%;
  margin-top: 0px;
}

#LeaderBoardHead h2 {
  font-family: sans-serif;
  color: #ffffff;
  padding: 0 0 0 0;
  font-size: 50;
  text-align: center;
}

#welcome {
  position: relative;
  margin-top: 180px;
  margin-right: 45%;
  margin-left: 5%;
  padding: 0px;
  float: right;
  width: auto;
  height: auto;
  background-color: ;
  z-index: 1;
}

#welcome h2 {
  font-size: 50;
  font-family: sans-serif;
  font-style: italic;
  color: #00a1ff;
}

#welcome h3 {
  color: #00a1ff;
  font-size: 22;
}

#welcome p {
  color: #00a1ff;
  font-size: 18;
}

<html>

<head>

  <title>Flash Crash</title>
  <link rel="shortcut icon" href="../assets/favicon.png">
  <meta name="viewport" content="width=device-width">
  <link rel="stylesheet" type="text/css" href="../css/stylesheet.css">

  <meta name="description" content="Flash Crash" />
  <meta name="viewport" content="width=device-width" />

</head>

<body>
  <div id="wrapper">
    <div id="header">

      <h1>Flash Crash</h1>

      <a id="selected" href="../index.php" hreflang="en-gb">Home</a><a href="../login.php" hreflang="en-gb">Login</a><a href="../feedback.php" hreflang="en-gb">Feedback</a></div>
    <link rel="stylesheet" type="text/css" href="../css/LeaderBoard.css" />

    <div id="LeaderBoard">

      <div id="LeaderBoardHead">
        <h2>Leader Board</h2>
      </div>

      <div id="LeaderBoardContent">

      </div>

    </div>
    <link rel="stylesheet" type="text/css" href="../css/welcome.css" />

    <div id="welcome">
      <h2>Welcome to Flash Crash!</h2>
      <h3>The Online Flash Card Crash Course for Computer Science</h3>
      <p>Flash Crash is a competitive online revision tool for computing students. <br> compete against your class mates by compleeting randomly generated quizzes <br> to earn points and unlock new editing permissions on the site!
      </p>
    </div>
  </div>
</body>

</html>

关于html - 神秘 margin ？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/44498145/

10-12 07:02
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