1
我只是不知道如何將其製作爲所有元素寬度相同的水平列表。我怎樣才能使這個列表水平等寬？
我真的不知道是否有任何信息丟失，所以只需評論/消息，如果你需要任何更多的信息。不在「網格」 <li>中的所有CSS都適用於導航欄。
body{
margin: 0;
font-family: Verdana,sans-serif;
}
.intro{
margin-left: 5%;
margin-right: 5%;
text-align: center;
font-family: Verdana,sans-serif;
}
.active {
background-color: red;
}
ul {
list-style-type: none;
margin: 0;
padding: 0;
overflow: hidden;
background-color: #333;
}
li {
float: right;
}
li a, .dropbtn {
display: inline-block;
color: white;
text-align: center;
padding: 14px 16px;
text-decoration: none;
}
li a:hover, .dropdown:hover .dropbtn {
background-color: red;
}
li.dropdown {
display: inline-block;
}
.dropdown-content {
display: none;
position: absolute;
background-color: #f9f9f9;
min-width: 160px;
box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
}
.dropdown-content a {
color: black;
padding: 12px 16px;
text-decoration: none;
display: block;
text-align: left;
}
.dropdown-content a:hover {background-color: #f1f1f1}
.dropdown:hover .dropdown-content {
display: block;
background-color: #D3D3D3
}
.button {
background-color: white;
color: black;
border: 2px solid #555555;
text-align: center;
text-decoration: none;
display: inline-block;
font-size: 16px;
-webkit-transition-duration: 0.4s; /* Safari */
transition-duration: 0.4s;
cursor: pointer;
}
.button:hover {
background-color: #555555;
color: white;
}
li.grid{
float:left
width: 25%
}<ul>
<li class="grid">
<form action="http://google.com">
<button class="button" type="submit" />
Computers, printers, mobile phones and the widgets that accompany them account for the emission of about two per cent of the estimated total of emissions from human activity. And that is the same as the aviation industry’s contribution. 25 per cent of the emissions in question are generated by the manufacture of computers. The rest come from their use.
<br>
<br>
</button>
</form>
</li>
<li class="grid">
<form action="http://google.com" style="float: left">
<button class="button" type="submit" />
Computers can be used to reduce emissions produced by other industries, up to 7.8 billion tonnes by 2020, or five times ICT’s own footprint. Computers can make industries more efficient and less wasteful of power and fuel.
</button>
</form>
</li>
<li class="grid">
<form action="http://google.com" style="float: left">
<button class="button" type="submit" />
The use of computers has led to both positive and negative impacts on the climate change of our planet. Computers can help make some processes more efficient and save energy while the use and manufacture of computers contributes to the increased use of energy which leads to global warming. This website helps you to look at the positives and negatives of computing and climate change.</p>
</button>
</form>
</li>
<li class="grid">
<form action="http://google.com" style="float: left">
<button class="button" type="submit" />
There are many ways in which computers can help cut down on our use of energy. Computers are steadily improving the amount of energy that they use with the smaller computers producing less CO2 than larger desktop computers.
<br>
<br>
</button>
</form>
</li>
</ul>
您忘記了'li.grid'中的分號。只是拼寫錯誤的問題通常是關閉的，但您也可以自己刪除此問題。 – BSMP