html - 部分隐藏页面的下部

Question

由于某种原因，尽管在 HTML 文档中它下面有更多部分，但我页面的一个部分变成了我页面的最后部分。如果删除该部分，则会显示其他部分。 HTMl 或 CSS 中是否有某些内容影响了我的页面？我需要显示页面的其余部分，因为它包含重要信息。

HTML:

<!-- ===========================================================================
                START NATURAL LANGUAGE MARKUP
   =========================================================================== -->

<section id="nlmarkup">
    <div class="inner">
         <h2>Who I am. <i class="title_line"></i> </h2>

        <p class="lead">The most important thing to me is
            <br>building products people love.</p>
        <form id="nl-form" class="nl-form">"I feel like making a
            <select>
                <option value="1" selected>app</option>
                <option value="2">website</option>
                <option value="3">mockup</option>
            </select>
            <br />that is
            <input type="text" value="" placeholder="(adjective)" data-subline="For example: <em>Responsive</em> or <em>Cool</em>"
            />within
            <br />the next
            <select>
                <option value="1" selected>week</option>
                <option value="1">two weeks</option>
                <option value="2">month</option>
                <option value="3">six months</option>
                <option vlaue="4">year</option>
            </select>and
            <br>delivered to me via
            <select>
                <option value="1" selected>email</option>
                <option value="1">dribbble</option>
                <option value="2">behance</option>
            </select>."
            <div class="nl-overlay"></div>
        </form>
    </div>
    </div>
</section>

CSS:

    @font-face {
    font-family: 'nlicons';
    src:url('../fonts/nlicons/nlicons.eot');
    src:url('../fonts/nlicons/nlicons.eot?#iefix') format('embedded-opentype'),
        url('../fonts/nlicons/nlicons.woff') format('woff'),
        url('../fonts/nlicons/nlicons.ttf') format('truetype'),
        url('../fonts/nlicons/nlicons.svg#nlicons') format('svg');
    font-weight: normal;
    font-style: normal;
}

/* general style for the form */
.nl-form {
    width: 100%;
    margin: 0.3em auto 0 auto;
    font-size: 4em;
    line-height: 1.5;
}

.nl-form ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

/* normalize the input elements, make them look like everything else */
.nl-form input,
.nl-form select,
.nl-form button {
    border: none;
    background: transparent;
    font-family: inherit;
    font-size: inherit;
    color: inherit;
    font-weight: inherit;
    line-height: inherit;
    display: inline-block;
    padding: 0;
    margin: 0;
    -webkit-appearance: none;
    -moz-appearance: none;
}

.nl-form input:focus {
    outline: none;
}

/* custom field (drop-down, text element) styling  */
.nl-field {
    display: inline-block;
    position: relative;
}

.nl-field.nl-field-open {
    z-index: 10000;
}

/* the toggle is the visible part in the form */
.nl-field-toggle,
.nl-form input,
.nl-form select  {
    line-height: inherit;
    display: inline-block;
    color: #b14943;
    cursor: pointer;
    border-bottom: 1px dashed #b14943;
}

/* drop-down list / text element */
.nl-field ul {
    position: absolute;
    visibility: hidden;
    background: #00aed7;
    left: -0.5em;
    top: 50%;
    font-size: 80%;
    opacity: 0;
    -webkit-transform: translateY(-40%) scale(0.9);
    -moz-transform: translateY(-40%) scale(0.9);
    transform: translateY(-40%) scale(0.9);
    -webkit-transition: visibility 0s 0.3s, opacity 0.3s, -webkit-transform 0.3s;
    -moz-transition: visibility 0s 0.3s, opacity 0.3s, -moz-transform 0.3s;
    transition: visibility 0s 0.3s, opacity 0.3s, transform 0.3s;
}

.nl-field.nl-field-open ul {
    visibility: visible;
    opacity: 1;
    -webkit-transform: translateY(-50%) scale(1);
    -moz-transform: translateY(-50%) scale(1);
    transform: translateY(-50%) scale(1);
    -webkit-transition: visibility 0s 0s, opacity 0.3s, -webkit-transform 0.3s;
    -moz-transition: visibility 0s 0s, opacity 0.3s, -moz-transform 0.3s;
    transition: visibility 0s 0s, opacity 0.3s, transform 0.3s;
}

.nl-field ul li {
    color: #fff;
    position: relative;
}

.nl-dd ul li {
    padding: 0 1.5em 0 0.5em;
    cursor: pointer;
    white-space: nowrap;
}

.nl-dd ul li.nl-dd-checked {
    color: #478982;
}

.no-touch .nl-dd ul li:hover {
    background: rgba(0,0,0,0.05);
}

.no-touch .nl-dd ul li:hover:active {
    color: #478982;
}

/* icons for some elements */
.nl-dd ul li.nl-dd-checked:before,
.nl-submit:before,
.nl-field-go:before {
    font-family: 'nlicons';
    speak: none;
    font-style: normal;
    font-weight: normal;
    font-variant: normal;
    text-transform: none;
    -webkit-font-smoothing: antialiased;
}

.nl-dd ul li.nl-dd-checked:before {
    content: "\e000";
    position: absolute;
    right: 1em;
    font-size: 50%;
    line-height: 3;
}

.nl-ti-text ul {
    min-width: 8em;
}

.nl-ti-text ul li.nl-ti-input input {
    width: 100%;
    padding: 0.2em 2em 0.2em 0.5em;
    border-bottom: none;
    color: #fff;
}

.nl-form .nl-field-go {
    position: absolute;
    right: 0;
    top: 0;
    height: 100%;
    cursor: pointer;
    background: rgba(0,0,0,0.1);
    width: 1.8em;
    text-align: center;
    color: transparent;
}
.nl-field-go:before {
    content: "\e001";
    font-size: 75%;
    color: #fff;
    width: 100%;
    line-height: 2.5;
    display: block;
}

/* custom placeholder color */
input::-webkit-input-placeholder {
    color: rgba(255,255,255,0.8);
}

input:active::-webkit-input-placeholder ,
input:focus::-webkit-input-placeholder {
    color: rgba(255,255,255,0.2);
}

input::-moz-placeholder {
    color: rgba(255,255,255,0.8);
}

input:active::-moz-placeholder,
input:focus::-moz-placeholder {
    color: rgba(255,255,255,0.2);
}

input:-ms-input-placeholder {  
    color: rgba(255,255,255,0.8);
}

input:active::-ms-input-placeholder ,
input:focus::-ms-input-placeholder {
    color: rgba(255,255,255,0.2);
}

/* example field below text input */
.nl-ti-text ul li.nl-ti-example {
    font-size: 40%;
    font-style: italic;
    font-weight: 400;
    padding: 0.4em 1em;
    color: rgba(0,0,0,0.2);
    border-top: 1px dashed rgba(255,255,255,0.7);
}

.nl-ti-text ul li.nl-ti-example em {
    color: #fff
}

/* submit button */
.nl-submit-wrap {
    margin-top: 0.4em;
}

/* overlay becomes visible when a field is opened */
.nl-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    opacity: 0;
    z-index: 9999;
    visibility: hidden;
    -webkit-transition: visibility 0s 0.3s, opacity 0.3s;
    -moz-transition: visibility 0s 0.3s, opacity 0.3s;
    transition: visibility 0s 0.3s, opacity 0.3s;
}

.nl-field.nl-field-open ~ .nl-overlay {
    opacity: 1;
    visibility: visible;
    -webkit-transition-delay: 0s;
    -moz-transition-delay: 0s;
    transition-delay: 0s;
}

@media screen and (max-width: 45em) {
    .nl-form {
        font-size: 3em;
    }
}

@media screen and (max-width: 25em) {
    .nl-form {
        font-size: 2em;
    }
}

Answer 1

额外的</div>朝向没有开口的底部<div> .