我将一个盒子阴影应用到一个表单，因此它的所有输入。对于提交按钮，我将它作为一个特定的类，我也在尝试应用 box-shadow: none，但它似乎没有被占用。知道为什么吗？
CSS：
body {
background: #b3b3b3;
font: 16px helvetica, arial, sans-serif;
}
.clear_both {
clear: both;
}
/* Heading */
#HeaderContainer {
background: #272727;
height: 120px;
box-shadow: 5px 5px 5px #7f7f7f;
}
#NavigationContainer {
position: relative;
float: right;
top: 90px;
margin: -5px 30px 0px 0px;
}
#NavigationContainer .current_page a {
color: #2e7de8;
text-shadow: 0px 0px 10px #2e7de8;
}
#NavigationContainer a:hover {
text-shadow: 0px 0px 15px #2e7de8;
}
#NavigationContainer li {
display: inline;
margin-left: 40px;
padding: 5px;
}
#NavigationContainer a {
text-decoration: none;
color: #FFF;
font: bold 20px helvetica, arial, sans-serif;
}
/* Content */
#MainContent {
width: 960px;
margin: 20px auto 40px auto;
}
#ContentRightColumn {
float: right;
width: 240px;
background: #272727;
padding: 20px 20px 40px 20px;
margin-top: 20px;
color: #fff;
border-radius: 15px;
box-shadow: 5px 5px 5px #7f7f7f;
}
#ContentRightColumn h1 {
font-size: 24px;
font-weight: bold;
}
#ContentRightColumn h3 {
font-size: 14px;
font-weight: bold;
}
#ContentRightColumn p {
font-size: 16px;
}
.news_item {
margin-top: 15px;
}
#ContentLeftColumn {
width: 640px;
padding: 20px;
}
#ContentLeftColumn h1 {
background: #272727;
color: #FFF;
max-width: 500px;
font-size: 24px;
font-weight: bold;
padding: 5px 10px;
border-radius: 15px;
box-shadow: 5px 5px 5px #7f7f7f;
position: relative;
right: 40px;
}
#ContentLeftColumn p {
text-indent: 1em;
}
.content_item {
margin-top: 20px;
}
.content_item p {
margin-top: 20px;
}
.content_item h2 {
font-weight: bold;
font-size: 24px;
color: #004dd4;
text-shadow: 3px 3px 4px #7f7f7f;
right: 20px;
}
/* Footer */
#FooterContainer {
background: #272727;
color: #fff;
}
#FooterContainer li {
display: inline;
}
#FooterContainer input, #FooterContainer textarea {
display: block;
width: 100%;
}
#ContactNavigationContainer {
float: right;
}
#FooterRightColumn {
width: 40%;
float: right;
margin: 20px 150px 20px 50px;
}
#FooterRightColumn form {
margin-top: 20px;
padding: 15px 20px;
}
#FooterRightColumn input, #FooterRightColumn textarea {
margin: 5px;
box-shadow: inset 5px 5px 8px black;
border: none;
font-size: 16px;
background: #b3b3b3;
padding: 5px 10px;
}
#FooterRightColumn textarea {
height: 160px;
}
#FooterRightColumn .current_contact_option {
margin-right: 20px;
padding-right: 20px;
border-right: 1px solid #FFF;
color: #2e7de8;
font-weight: bold;
text-shadow: 0px 0px 5px #2e7de8;
}
#FooterLeftColumn {
width: 40%;
padding: 40px 50px;
margin-left: 100px;
margin-top: 20px;
}
#FooterLeftColumn h1 {
font-weight: bold;
font-size: 24px;
position: relative;
right: 20px;
}
#FooterLeftColumn p {
padding: 20px 0px;
text-indent: 1em;
}
.submit_button {
position: relative;
width: 80px;
float: right;
}
html:
<html>
<head>
<title>B.workshop Home</title>
<link rel="stylesheet" type="text/css" href="../css/reset.css" />
<link rel="stylesheet" type="text/css" href="../css/style.css" />
</head>
<body>
<div id="HeaderContainer">
<img src="../images/logo.png"></img>
<div id="NavigationContainer">
<ul id="NavigationMenu">
<li class="current_page"><a href="home.html">Home</a></li>
<li><a href="#">Technologies</a></li>
<li><a href="#">Projects</a></li>
</ul>
</div> <!-- Close NavigationContainer -->
</div> <!-- Close HeaderContainer -->
<div id="MainContent">
<div id="ContentRightColumn">
<h1>News</h1>
<div class="news_item">
<h3>Mon. October 28th</h3>
<p>I need to build a portfolio, you need a website or application. Until I I get a few jobs under the belt I'm offering to work at the equivalent of a paid interns wage. Take advantage of this while you can!</p>
</div>
<div class="news_item">
<h3>Mon. October 26th</h3>
<p>The website is now live!</p>
</div>
</div> <!-- Close RightColumn -->
<div id="ContentLeftColumn">
<h1>Welcome to Brett's Workshop...</h1>
<div class="content_item">
<h2>So who are you?</h1>
<p>Hi, my name is Brett Sprouse and you've found my homepage! I'm a freelance web developer and programmer. Take a look around and if you think you may have a project I can help you with then head over to the contact page and share it with me.</p>
</div>
<div class="content_item">
<h2>Ok, and what can you do for me?</h2>
<p>Well, I can make you a webpage of course. Not just that, but setup hosting, provide server maintenance, website support, both per job or on a contractual basis. I can likely also take over support for existing websites in addition to the one I may make from scratch.</p>
<p>Everything is coded to the current html specifications including html5 and css3 (when applicable, many browsers still do not support the current html5/css3 specifications). I said I'm a programmer as well so this means I can work my way around javascript for front end/client side interactivity as well as server side scripting preferentially with python though I can also use php if it's for some reason forced upon me.</p>
</div>
<div class="content_item">
<h2>Is that it?</h2>
<p>What do you mean is that it!? Ok, ok, I can also develop desktop applications, tools and utilities, or scripts to help automate otherwise monotonous tasks; pretty much anything within a programmers domain. I know quite a few languages, libraries, frameworks, and can learn new ones rather quickly. Both windows and linux so if there's a task you believe can be solved with programming I can likely make that happen for you. Do keep in mind however that I am only one guy so there is a limit to the size of projects in which I can handle, but if you're not sure it doesn't hurt to ask. </p>
</div>
</div> <!-- Close LeftColumn -->
</div> <!-- Close MainConent -->
<div id="FooterContainer">
<div id="FooterRightColumn">
<div id="ContactNavigationContainer">
<ul id="ContactNavigation">
<li class="current_contact_option">Message Form</li>
<li>Live Chat</li>
</ul>
</div> <!-- Close ContactNavigationContainer -->
<form>
<input type="text" value="Name" name="name"></input>
<input type="text" value="Email" name="email"></input>
<textarea type="text" value= "Message" name="message"></textarea>
<div class="submit_button"><input type="submit" value="submit"></input></div>
</form>
</div> <!-- Close FooterRightColumn -->
<div id="FooterLeftColumn">
<h1>Contact</h1>
<p>So you've looked me over and decided to give me a shot. Well you won't be let down. Just use the form on your right to send me a shot description and anything else you feel is necessary and I'll get back to you shortly with a proposal. If you've happened to catch me when I'm on the computer and would like to talk directly feel free to use the new live chat system!</p>
</div> <!-- Close FooterLeftColumn -->
<div class="clear_both"></div>
</div> <!-- Close FooterContainer -->
</body>
</html>