为什么向下滚动时页脚会隐藏内容？

Why is my footer hiding content when I scroll down?

我想弄清楚为什么我的页脚挡住了我的内容。它之前没有这样做，所以我不知道问题出在哪里。我尝试将 height: 100% 或 min-height: 100vh 设置为 height: 100% 或 min-height: 100vh 但它仍然没有用。所以我把整个代码放在一起，这样你就可以更好地看到它，希望这对你有帮助。如果您需要更多 HTML，请告诉我，但这就是所有代码，显然还有更多 HTML 页，但我只专注于放置页脚。

HTML

 <footer>
 <p>Jawed A. Tajzai
    <br>
     <a href="mailto:tajzaijoey@gmail.com" title="email">JTajzai@montgomerycollege.edu</a>
</p>    
</footer> 

    CSS 
    
    body {
    margin-bottom: 100px;
    clear: both;
    margin: 0;
    background-color: #c8d8e4;
    padding-bottom: 2%;
}

nav {
    overflow: hidden;
    navbar-static:top;
    background-color: #39395F;
    position: fixed;
    height: 75px;
    width: 100%;
    top: 0;
    z-index: 100;
    
}

nav ul {
    list-style-type: none;
}

nav ul li {
    float: right;
}

nav a:link {
    display: block;
    width: 6em;
    color: yellow;
    font-family: Gotham, "Helvetica Neue", Helvetica, Arial, "sans-serif";
    text-decoration: none;
    text-align: center;
    margin-top: 5px;
    padding: 0.5em 0.5em;
    position: relative;
    top: 0;
}

nav a:visited
{
  color: white;
}

a:hover 
{
    color:#FFFFFF;
}

nav a::before {
  content: "";
  display: block;
  height: 5px;
  width: 0%;
  background-color: white;
  position: absolute;
  bottom: 0;
  transition: all ease-in-out 100ms;
  margin-left: 20px;
}

nav ul a:hover::before {
  width: 50%;
}

/* Nav - End */

/* Index - Start */

#headshot {
    clear: right;
    display: block;
    margin: 0 auto;
    margin-top: 7%;
    margin-bottom: 2%;
}

#aboutme {
    height: 100%;
    width: 75%;
    margin: 0 auto;
    margin-bottom: 10%;
    font-size: 1.2em;
    border: 5px double #39395F;
    padding: 1em 1em;
}

/* Index - End */

/* Footer - Start */

footer {
    text-align: center;
    background-color: #39395F;
    position: fixed;
    overflow: hidden;
    width: 100%;
    z-index: 3;
    bottom: 0;
    left: 0;
    right: 0;
    }

footer p{
    color: white;
    font-size: 1.3em;
}

footer a{
    color: white;
}

footer a:hover {
    color: lightblue;
}

/* Footer - End */

/* Project - Start */

#column1proj {
    float: left;
    width: 25%;
    margin-bottom: 2%;
    margin-top: 15%;
    margin-left: 10%;
    padding: 1em;
    position: fixed;
    height: 100%;
}

#projtitle {
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: 2%;
    font-size: 2em;
    font-family: Constantia, "Lucida Bright", "DejaVu Serif", Georgia, "serif";
}

h1 {
    text-align: center;
    font-family: Constantia, "Lucida Bright", "DejaVu Serif", Georgia, "serif";
}

.projectimgs{
    display: block;
    margin: 0 auto;
}

.projecttxt {
    margin-top: 5%;
    text-align: center;
    font-size: 1.2em;
}

div dd a {
    text-decoration: none;
    color: black;
    font-size: 1.2em;
}

div dd a:hover {
    color: grey;
}

#column2proj {
    float: right;
    width: 50%;
    height: 100%;
    border: 10px solid white;
    padding: 0 2%;
    margin: 3% 5% 2% 0;
}

/* Project - End */

/* Hobbies - Start */

div h1::before {
  content: '';
  display: block;
  height: 75px;
  margin-top: -75px;
  visibility: hidden;
}

#column1hob {
    float: left;
    width: 25%;
    margin-top: 18%;
    margin-left: 10%;
    padding: 1em;
    position: fixed;
}

#column2hob {
    float: right;
    width: 50%;
    height: 100%;
    border: 10px solid white;
    padding: 0 2%;
    margin: 8% 5% 2% 0;
}


#hobtitle {
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: 2%;
    font-size: 2em;
    font-family: Constantia, "Lucida Bright", "DejaVu Serif", Georgia, "serif";
}

.hobimgs {
    display: block;
    margin: 0 auto;
}

.hobtxt {
    margin-top: 5%;
    text-align: center;
    font-size: 1.2em;
}

div dd {
    margin-left: -1%;
}

/* Hobbies - End */

/* Resume - Start */

#bodyres {
    margin-left: 2%;
}

#title {
    margin-top: 8%;
}

#title p {
    text-align: center;
}

#resumeme {
    text-align: center;
    font-weight: 600;
}

hr {
    width: 80%;
    margin-top: 15px;
    border: none;
    height: 3px;
    background-color: #333;
 }

div ul{
    list-style-type: none;
}
    
.job, .school {
    font-weight: bold;
}

.title, .achievements {
    font-style: italic;
}

h3, .title, .achievements {
    text-decoration: underline;
}

#main {
    font-size: 18px;
}

/* Resume - End */

/* My Goals - Start */


#column1goals {
    float: left;
    width: 50%;
    height: 100%;
    border: 10px double white;
    padding: 0 2%;
    margin: 0 5% 5% 5%;
}

table {
    margin-top: 10%;
    margin-left: 5%;
    width: 30%;
}

#headergoal {
    text-transform: uppercase;
    text-align: center;
    font-size: 2em;
    font-family: Constantia, "Lucida Bright", "DejaVu Serif", Georgia, "serif";
}

#goaldets {
    font-size: 1.1em;
    font-family: "Gill Sans", "Gill Sans MT", "Myriad Pro", "DejaVu Sans Condensed", Helvetica, Arial, "sans-serif";
}

th {
    font-family: Constantia, "Lucida Bright", "DejaVu Serif", Georgia, "serif";
}

td {
    font-family: "Gill Sans", "Gill Sans MT", "Myriad Pro", "DejaVu Sans Condensed", Helvetica, Arial, "sans-serif";
}
/* My Goals - Endbody {
    margin-bottom: 100px;
    clear: both;
    margin: 0;
    background-color: #c8d8e4;
    padding-bottom: 2%;
}

nav {
    overflow: hidden;
    navbar-static:top;
    background-color: #39395F;
    position: fixed;
    height: 75px;
    width: 100%;
    top: 0;
    z-index: 100;
    
}

nav ul {
    list-style-type: none;
}

nav ul li {
    float: right;
}

nav a:link {
    display: block;
    width: 6em;
    color: yellow;
    font-family: Gotham, "Helvetica Neue", Helvetica, Arial, "sans-serif";
    text-decoration: none;
    text-align: center;
    margin-top: 5px;
    padding: 0.5em 0.5em;
    position: relative;
    top: 0;
}

nav a:visited
{
  color: white;
}

a:hover 
{
    color:#FFFFFF;
}

nav a::before {
  content: "";
  display: block;
  height: 5px;
  width: 0%;
  background-color: white;
  position: absolute;
  bottom: 0;
  transition: all ease-in-out 100ms;
  margin-left: 20px;
}

nav ul a:hover::before {
  width: 50%;
}

/* Nav - End */

/* Index - Start */

#headshot {
    clear: right;
    display: block;
    margin: 0 auto;
    margin-top: 7%;
    margin-bottom: 2%;
}

#aboutme {
    height: 100%;
    width: 75%;
    margin: 0 auto;
    margin-bottom: 10%;
    font-size: 1.2em;
    border: 5px double #39395F;
    padding: 1em 1em;
}

/* Index - End */

/* Footer - Start */

footer {
    text-align: center;
    background-color: #39395F;
    position: fixed;
    overflow: hidden;
    width: 100%;
    z-index: 3;
    bottom: 0;
    left: 0;
    right: 0;
    }

footer p{
    color: white;
    font-size: 1.3em;
}

footer a{
    color: white;
}

footer a:hover {
    color: lightblue;
}

/* Footer - End */

/* Project - Start */

#column1proj {
    float: left;
    width: 25%;
    margin-bottom: 2%;
    margin-top: 15%;
    margin-left: 10%;
    padding: 1em;
    position: fixed;
    height: 100%;
}

#projtitle {
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: 2%;
    font-size: 2em;
    font-family: Constantia, "Lucida Bright", "DejaVu Serif", Georgia, "serif";
}

h1 {
    text-align: center;
    font-family: Constantia, "Lucida Bright", "DejaVu Serif", Georgia, "serif";
}

.projectimgs{
    display: block;
    margin: 0 auto;
}

.projecttxt {
    margin-top: 5%;
    text-align: center;
    font-size: 1.2em;
}

div dd a {
    text-decoration: none;
    color: black;
    font-size: 1.2em;
}

div dd a:hover {
    color: grey;
}

#column2proj {
    float: right;
    width: 50%;
    height: 100%;
    border: 10px solid white;
    padding: 0 2%;
    margin: 3% 5% 2% 0;
}

/* Project - End */

/* Hobbies - Start */

div h1::before {
  content: '';
  display: block;
  height: 75px;
  margin-top: -75px;
  visibility: hidden;
}

#column1hob {
    float: left;
    width: 25%;
    margin-top: 18%;
    margin-left: 10%;
    padding: 1em;
    position: fixed;
}

#column2hob {
    float: right;
    width: 50%;
    height: 100%;
    border: 10px solid white;
    padding: 0 2%;
    margin: 8% 5% 2% 0;
}


#hobtitle {
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: 2%;
    font-size: 2em;
    font-family: Constantia, "Lucida Bright", "DejaVu Serif", Georgia, "serif";
}

.hobimgs {
    display: block;
    margin: 0 auto;
}

.hobtxt {
    margin-top: 5%;
    text-align: center;
    font-size: 1.2em;
}

div dd {
    margin-left: -1%;
}

/* Hobbies - End */

/* Resume - Start */

#bodyres {
    margin-left: 2%;
}

#title {
    margin-top: 8%;
}

#title p {
    text-align: center;
}

#resumeme {
    text-align: center;
    font-weight: 600;
}

hr {
    width: 80%;
    margin-top: 15px;
    border: none;
    height: 3px;
    background-color: #333;
 }

div ul{
    list-style-type: none;
}
    
.job, .school {
    font-weight: bold;
}

.title, .achievements {
    font-style: italic;
}

h3, .title, .achievements {
    text-decoration: underline;
}

#main {
    font-size: 18px;
}

/* Resume - End */

/* My Goals - Start */


#column1goals {
    float: left;
    width: 50%;
    height: 100%;
    border: 10px double white;
    padding: 0 2%;
    margin: 0 5% 5% 5%;
}

table {
    margin-top: 10%;
    margin-left: 5%;
    width: 30%;
}

#headergoal {
    text-transform: uppercase;
    text-align: center;
    font-size: 2em;
    font-family: Constantia, "Lucida Bright", "DejaVu Serif", Georgia, "serif";
}

#goaldets {
    font-size: 1.1em;
    font-family: "Gill Sans", "Gill Sans MT", "Myriad Pro", "DejaVu Sans Condensed", Helvetica, Arial, "sans-serif";
}

th {
    font-family: Constantia, "Lucida Bright", "DejaVu Serif", Georgia, "serif";
}

td {
    font-family: "Gill Sans", "Gill Sans MT", "Myriad Pro", "DejaVu Sans Condensed", Helvetica, Arial, "sans-serif";
}
/* My Goals - End

你需要像这样写 footer p a{ color: white;} footer p a:hover{ color: lightblue;} 并且还需要检查颜色是否被覆盖，并使用 inspect 检查你的输出。

将此添加到#aboutme overflow-y：自动；

footer {
      position: sticky;
      bottom:0;
      left:0;
      right:0
      }