问Z索引阻止滚动框在CSS中工作

EN

  text-align: center;* {
  font-family: sans-serif;
  box-sizing: border-box;
}


/* The six dividing sections ------  */

html,
body {
  height: 100%;
  width: 100%;
  padding: 0%;
  margin: 0%;
}

div {
  width: 100%;
  height: 100%;
}

#div2 {
  background: #e8e8e8;
  position: relative;
  z-index: -2;
}


/* main classes --------------  */



/* THREE CLASSES, Cover, Profile, scroll box  */

.ryan-profile {
  height: 150px;
  width: 150px;
  border-radius: 50%;
  border: 4px solid #d9d9d9;
  display: block;
  position: relative;
  margin-bottom: 0;
  z-index: 5;
}

.cover-photo1 {
  margin-left: auto;
  margin-right: auto;
  width: 800px;
  height: 200px;
  display: block;
  margin-bottom: 0;
  position: relative;
  z-index: 4;
}

.p-one {
  width: 800px;
  height: 255px;
  border-style: outset;
  text-align: justify;
  padding-top: 35px;
  padding-left: 15px;
  padding-right: 15px;
  box-shadow: 10px 10px 2.5px #d9d9d9;
  background-color: white;
  font-size: 15px;
  line-height: 1.5em;
  border: 6px;
  overflow-y: scroll;
  margin-bottom: 0;
  margin-top: 0;
  display: block;
  margin-left: auto;
  margin-right: auto;
  position: relative;
  z-index: 2;
}


/* ===== New ===== */

.profile-pic-class img {
  margin-left: auto;
  margin-right: auto;
  margin-top: -75px;
  /* Raise your profile picture by 50% of your profile picture's height */
}

.cover-photo {
  background-image: url("https://cdn.britannica.com/08/100608-004-B89F31B2.jpg");
  background-size: cover;
  background-position: center;
}

.cover-photo h1 {
  text-align: center;
  color: black;
  margin-top: 0;
  text-align: center;
  font-size: 65px;
  margin-bottom: 100px;
}

<div id="div2">
  <section>
    <div class="cover-photo">
      <h1 id="about" class="lawyer-header">Lawyer Turned Developer</h1>
    </div>

    <div class="profile-pic-class">
      <img class="ryan-profile" src="images/ryan-profile.jpg" alt "Photo of Ryan McAvoy, Developer">
    </div>
    <div class="scroll-box1">
      <figure class="p-one">
        <p>After successfully completing a Degree and Masters Degree in Law, I began searching for a job within the legal industry. Unfortunately (later found to be fortunate), this proved to be very difficult. Having some previous sales experience, I decided
          to accept recruitment job offer with Mortimer Spinks. At the time, I did not know what recruitment entailed nor did I know anything about the industry I was soon to be recruiting in, technology.</p>
        <p>Working as a recruiter was an eye-opening experience into the world of technology. It was only through working at Mortimer Spinks I began to realise how much technology is integrated into our daily lives. Moreover, I discovered the depth of work
          required to develop such technologies. </p>
        <p>The part I most enjoyed about recruitment was meeting with developers and talking about the latest technologies and their personal projects. I’ve always been quite entrepreneurial and once I discovered the capabilities of technology, I began coming
          up with solutions to everyday problems. Naturally, I did not have the skills or finance to build these ideas; having worked in recruitment I know how expensive building websites and apps can be. I also thought given my age (26 at the time),
          it would be too late to learn how to code. I decided to put these ideas to the back of my brain and focus on my career instead. </p>
        <p>Eventually, I managed secure a paralegal position within a highly respectable law firm which has been involved in some of England’s most notable cases in the last 30 years. I enjoy my current job and still like law however, these ideas are still
          festering at the back of my brain. I have considered the possibility of becoming a solicitor and then using the money from that to fund the various ideas. It was at this point I thought, why not become a developer yourself. I’m extremely passionate
          about technology and really believe, if not already, the tech industry is the future. Why not work as a developer, learn the required skills and network with the people within the industry I wish to one day establish my business. It does not
          make sense to have a career in law with the knowledge that in five years time I plan to establish a business within a completely different industry. </p>
      </figure>