我有问题要检测我何时使用手机，平板电脑和台式机/笔记本电脑？我想知道我做错了什么。我提供了代码并且它不完整但我不明白为什么当我将屏幕从移动设备调整到台式机/笔记本电脑显示器时，一切都不合适。我想知道当我回到桌面视图时如何重置？还有调整我在我的网站上显示的图像的问题。我想根据设备的大小调整大小。我有一个徽标图像和横幅图像，在这两个图像的顶部是导航栏，我也有问题调整大小并使其透明，因为导航栏在灰色背景上。如何在横幅和徽标上使其透明。我感谢到目前为止我得到的所有帮助。我有很多进步。谢谢你们！
这是html代码：
<nav>
<ul>
<li><a class="selected" href="index.html">Home</a></li>
<li><a href="chat.html">Get Help</a></li>
<li><a href="http://community.yesican.org">Community</a></li>
<li><a href="resources.html">Resources</a></li>
<li><a href="about.html">About YIC</a></li>
<li><a href="supportyic.html">Get Involved</a></li>
</ul>
</nav>
</header>
<img id="banner" src="img/banner.jpg"/>
<!--The main content of the website will go inside of the #wrapper id. It is divided into two sections: #primary & #secondary.-->
<div id="wrapper">
<!-- Two sections have been created for desktop view to have two columns. Mobile website will just be stacked-->
<div id="content">
<section id="primary"><!--Left column content goes here-->
<h2>Who We Are</h2>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Aenean in elementum velit, venenatis rhoncus lacus. Ut consequat luctus enim, in auctor libero posuere ut. Curabitur vitae aliquet nisi. Etiam condimentum tincidunt venenatis. Fusce vel congue purus. Pellentesque ut eleifend ex. Nunc purus neque, aliquam vitae aliquam quis, accumsan id lacus. Nunc ac scelerisque magna. Etiam purus lorem, rutrum et ornare a, tincidunt non ipsum. Nullam blandit dui venenatis, malesuada felis a, porttitor purus.</p>
<p><a href="#">This is how a link looks.</a></p>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Aenean in elementum velit, venenatis rhoncus lacus. Ut consequat luctus enim, in auctor libero posuere ut. Curabitur vitae aliquet nisi. Etiam condimentum tincidunt venenatis. Fusce vel congue purus. Pellentesque ut eleifend ex. Nunc purus neque, aliquam vitae aliquam quis, accumsan id lacus. Nunc ac scelerisque magna. Etiam purus lorem, rutrum et ornare a, tincidunt non ipsum. Nullam blandit dui venenatis, malesuada felis a, porttitor purus.</p>
</section>
<section id="secondary"><!--Right column content goes here-->
<h2>Memorial</h2>
<img src="img/memorial_list.jpg"/>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Aenean in elementum velit, venenatis rhoncus lacus. Ut consequat luctus enim, in auctor libero posuere ut.</p>
</section>
</div>
</div>
<!--Footer still needs to be completed-->
<footer>
<div id="footer-right">
<ul><h3>ABOUT</h3>
<li><a href="">Contact Us</a></li>
<li><a href="">FAQ's</a></li>
<li><a href="">Site Map</a></li>
</ul>
<ul><h3>SUPPORT OUR CAUSE</h3>
<li><a href="">Donate</a></li>
<li><a href="">Volunteer</a></li>
<li><a href="">Fundraising Events</a></li>
</ul>
<ul><h3>FOLLOW US</h3>
<li>
<a href="#Facebook handle here"><img src="img/facebook-icon.png" alt="Facebook Logo" class="social-icon"></a>
<a href="#Instagram handle here"><img src="img/instagram-icon.png" alt="Instagram Logo" class="social-icon"></a>
<a href="#Twitter handle here"><img src="img/twitter-icon.png" alt="Twitter Logo" class="social-icon"/></a>
<a href="#Pinterest handle here"><img src="img/pinterest-icon.png" alt="Pinterest Logo" class="social-icon"/></a>
</li>
</ul>
</div>
<div id="footer-left">
<p id="footer-slogan">BREAK THE <strong>SILENCE</strong> <br>AND <strong>CYCLE</strong> OF ABUSE</p>
<p id="copyright">Copyright© 2014 International Child Advocacy Network</p>
</div>
</footer>
这是responisve.css代码：
/*This is the placeholder for responsive CSS that we will implement for mobile design*/
/* Smartphones (portrait and landscape) ----------- */
@media only screen
and (min-device-width : 320px)
and (max-device-width : 480px) {
/* Styles */
#content{
text-align:center;
}
#body{
float left; font-family:Fabrica
}
#nav{
text align:center; font-size:.9em;
}
}
/* Smartphones (landscape) ----------- */
@media only screen
and (min-width : 321px) {
/* Styles */
@font-face {
font-family: 'Fabrica';
font-style: normal;
font-weight: 100;
src: local('Fabrica'), local('Fabrica'), url(path/Fabrica.otf) format('otf');
}
}
/* Smartphones (portrait) ----------- */
@media only screen
and (max-width : 320px) {
/* Styles */
@font-face {
font-family: 'Fabrica';
font-style: normal;
font-weight: 100;
src: local('Fabrica'), local('Fabrica'), url(path/Fabrica.otf) format('otf');
}
}
/* iPads (portrait and landscape) ----------- */
@media only screen
and (min-device-width : 768px)
and (max-device-width : 1024px) {
/* Styles */
}
/* iPads (landscape) ----------- */
@media only screen
and (min-device-width : 768px)
and (max-device-width : 1024px)
and (orientation : landscape) {
/* Styles */
}
/* iPads (portrait) ----------- */
@media only screen
and (min-device-width : 768px)
and (max-device-width : 1024px)
and (orientation : portrait) {
/* Styles */
}
/* Desktops and laptops ----------- */
@media only screen
and (min-width : 1224px) {
/* Styles */
}
/* Large screens ----------- */
@media only screen
and (min-width : 1824px) {
/* Styles */
}
/* iPhone 4 ----------- */
@media only screen and (-webkit-min-device-pixel-ratio : 1.5),
only screen and (min-device-pixel-ratio : 1.5) {
/* Styles */
}
/*************************************
TWO COLUMN LAYOUT
Will target anything larger than average smartphone.
This is helpful for normal sized tablets, very large smartphones, and very small desktop windows.
***************************************/
#primary {
width: 50%;
float: left;
padding:10px;
}
#secondary {
width: 40%;
float: right;
padding:10px;
}
答案 0 :(得分：1)
试试这个：
#primary, #secondary {
dialay:inline-block;
width:45%;
padding:.5%;
margin:.5%;
}
相同的样式适用于两个div。不需要漂浮。然后你应该把它们一起包装在一起：
<dig align=center><div id="primary"><div id="secondary"></div>
他们应该很好。