在菜单页面CSS HTML下显示的文本

Question

我创建了一个HTML网站，但遇到了问题，我从互联网上获得了一个菜单并编辑了该网站，现在我意识到菜单项出现在菜单背景下。

我在andrei-marin.com上获得了该网站的在线信息，您可以查看一下。

我发现的一件事是，如果在标题中放置“ display：flex”，菜单会完美工作，但一切都不在位。

我将在下面添加代码。

// function to open/close nav
function toggleNav(){
  // if nav is open, close it
  if($("nav").is(":visible")){
    $("nav").fadeOut();
    $("button").removeClass("menu");
  }
  // if nav is closed, open it
  else{
    $("button").addClass("menu");
    $("nav").fadeIn().css('display', 'flex');
  }
}

// when clicking + or ☰ button
$("button").click(function(){
  // when clicking ☰ button, open nav
  if($("header").hasClass("open")){
    toggleNav();
  }
  // when clicking + button, open header
  else{
    $("header").addClass("open");
  }
});

// close nav
$("#nav-close").click(function(){
  toggleNav();
});

// scroll to sections
$("nav li").click(function(){
  // get index of clicked li and select according section
  var index = $(this).index();
  var target = $("content section").eq(index);

  toggleNav();

  $('html,body').delay(300).animate({
    scrollTop: target.offset().top
  }, 500);
});

/* GLOBAL STYLES */
body, html {
  height: 100%;
  margin: 0;
  font-family: Arial;
  background-color: lightgray;
}
.main_image{
  padding-top:50%;
  background-image: url('bg.jpg');
  height:100%;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  padding-top: 0em;
  display: flex;
  justify-content: center;

}
/* DEMO-SPECIFIC STYLES */
.typewriter{
  margin-top:25%;
  font-size: 20px;
}
.typewriter h1 {
  color: #fff;
  overflow: hidden; /* Ensures the content is not revealed until the animation */
  border-right: .15em solid orange; /* The typwriter cursor */
  white-space: nowrap; /* Keeps the content on a single line */
  margin: 0 auto; /* Gives that scrolling effect as the typing happens */
  letter-spacing: .15em; /* Adjust as needed */
  animation:
    typing 3.5s steps(30, end),
    blink-caret .5s step-end infinite;
}

/* The typing effect */
@keyframes typing {
  from { width: 0 }
  to { width: 100% }
}

/* The typewriter cursor effect */
@keyframes blink-caret {
  from, to { border-color: transparent }
  50% { border-color: white }
}
header {
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;

  flex-direction: column;
  justify-content: center;
  align-items: center;
}
header button {
  position: relative;
  z-index: 10;
}

header button {
  font-family: "Font Awesome 5 Free";
  font-weight: 900;
  position: absolute;
  bottom: 100px;
  left: calc(50% - 60px);
  width: 120px;
  height: 50px;
  border: 0;
  box-shadow: 2px 1px 20px 0 rgba(0, 0, 0, 0.5);
  border-radius: 10px;
  cursor: pointer;
  background: #fff;
  font-size: 1em;
  color: #09203f;
  transition: all 0.8s cubic-bezier(0.645, 0.045, 0.355, 1), transform 0.3s cubic-bezier(0.455, 0.03, 0.515, 0.955), box-shadow 0.3s cubic-bezier(0.455, 0.03, 0.515, 0.955);
  overflow: hidden;

}
header button:hover {
  box-shadow: 0 0 0 0 rgba(0, 0, 0, 0.5);
}
header button:focus {
  outline: 0;
}
header button:before, header button:after {
  font-family: "Font Awesome 5 Free";
  transition: all 0.8s cubic-bezier(0.645, 0.045, 0.355, 1);
  top: 17px;
  position: absolute;
}
header button:before {
  content: "\f067";
  opacity: 1;
  left: 53px;
}
header button:after {
  content: "\f0c9";
  opacity: 0;
  left: 0;
}
header.open button {
  position: fixed;
  left: 40px;
  bottom: 40px;
  width: 50px;
  border-radius: 50%;
}
header.open button:before {
  opacity: 0;
  left: 100%;
}
header.open button:after {
  opacity: 1;
  left: 18px;
}
header.open button.menu {
  width: 100%;
  height: 100%;
  bottom: 0;
  left: 0;
  border-radius: 0;
}
header.open button.menu:after {
  left: -100%;
}

content section {
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  text-transform: uppercase;
  font-size: 1em;
  letter-spacing: 2pt;
  color: #fff;
}

nav {
  position: fixed;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  display: none;
}
nav ul {
  list-style: none;
}
nav ul li {
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  text-transform: uppercase;
  line-height: 2;
  letter-spacing: 1pt;
  font-size: 2em;
  color: #09203f;
  animation: fadeDown .5s forwards;
  opacity: 0;
  cursor: pointer;
  transform: translateY(-20px);
  transition: all 0.3s cubic-bezier(0.455, 0.03, 0.515, 0.955);
}
nav ul li:hover {
  text-shadow: 2px 1px 40px rgba(0, 0, 0, 0.5);
  opacity: .8;
}
nav ul li:nth-child(1) {
  animation-delay: 0.8s;
}
nav ul li:nth-child(2) {
  animation-delay: 0.9s;
}
nav ul li:nth-child(3) {
  animation-delay: 1s;
}
nav #nav-close {
  position: fixed;
  top: 40px;
  right: 40px;
  font-size: 1.5em;
  cursor: pointer;
  animation: fadeDown .5s forwards;
  animation-delay: 1.1s;
  opacity: 0;
  color: #09203f;
  transform: translateY(-20px);
}
@keyframes fadeDown {
  0% {
    opacity: 0;
    transform: translateY(-20px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

<!DOCTYPE html>
<html lang="en" dir="ltr">
  <head>
    <meta charset="utf-8">
    <title>Andrei Marin</title>
    <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.5.0/css/all.css" integrity="sha384-B4dIYHKNBt8Bc12p+WXckhzcICo0wtJAoU8YZTY5qE0Id1GSseTk6S+L3BlXeVIU" crossorigin="anonymous">

    <link rel='stylesheet' href='https://fonts.googleapis.com/css?family=Montserrat:400,700'>
    <link rel="stylesheet" href="master.css">
  </head>
  <body>
    <header>
    <div class="main_image">


      <div class="typewriter">
        <h1>Andrei Marin</h1>
      </div>

<button></button>


</header>

<nav>
  <ul>
    <li>Home</li>
    <li>About</li>
    <li>Projects</li>
    <li>Contact</li>
  </ul>
  <div id="nav-close"><i class="fas fa-times"></i></div>
</nav>

<content>
  <section>Home</section>
  <section>About</section>
  <section>Projects</section>
  <section>Contact</section>
</content>

<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.1/jquery.min.js'></script>
<script  src="master.js"></script>
  </body>
</html>

Answer 1

尝试删除z-index: 10;中的header button{（第59行）吗？