Question

当我想要设计样式时，“cta”类没有做任何事情。我错过了什么或打错了吗？任何人都可以帮助我，因为它让我疯了。对不起，但这个愚蠢的事情告诉我要添加更多的信息，我只是写了一堆垃圾现在哈哈所以只是忘了这部分，但真的会有一些帮助

<html>
<head>
    <meta http-equiv="content-type" content="text/html; charset=UTF=8">
    <meta name="viewport" content="width=device-width, maxium-scale=1.0, minimun-width=1.0,
    initial-width=1.0" />
    <title>Welcome to Drunken Anticz</title>
    <link rel="stylesheet" type="text/css" href="css/screen_style.css" />
    <link rel="stylesheet" type="text/css" href="css/screen_layout_large.css />
    <link rel="stylesheet" type="text/css" media="only screen and (min-width:50px) and 
    (max-width:500px)" href="css/scrren_layout_small.css" />
    <link rel="stylesheet" type="text/css" media="only screen and (min-width:501px) and 
    (max-width:750px)" href="css/scrren_layout_medium.css" />
    <!--[if lt IE 9]>
        <script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script>
    <![endif] -->
</head>
    <body>
        <div class="page">

            <header>
                <a class="logo" href="#"></a>
            </header>

            <article>
                <h1>Welcome</h1>
                <p>Welcome to the site blah blah blahblah blah blahblah blah blahblah blah blah
                blah blah blahblah blah blahblah blah blahblah blah blahblah blah blahblah blah blah
                blah blah blahblah blah blah</p>
            </article>

            <div class="promo-container">
                <div class="promo">
                    <div class="content">
                        <h3><a href="#">Events</a></h3>
                        <p>list of eventslist of eventslist of eventslist of eventslist of events
                        list of eventslist of eventslist of eventslist of eventslist of events</p>
                        <p><a class="cta" href="#">More info.</a></p>
                    </div>
                </div>
            </div>
            <div class="promo-container">
                <div class="promo">
                    <div class="content">
                        <h3><a href="#">Loyalty Cards</a></h3>
                        <p>info about loyalty cardsinfo about loyalty cardsinfo about loyalty cards
                        info about loyalty cardsinfo about loyalty cardsinfo about loyalty cards</p>
                        <p><a class="cta" href="#">More info.</a></p>
                    </div>
                </div>
            </div>


        <nav>
            <a href="#">Home</a>
            <a href="#">Event's</a>
            <a href="#">Book Us</a>
            <a href="#">Loyalty Card</a>
            <a href="#">Contact Us</a>
        </nav>

        </div>
    </body>

@charset "UTF=8";

body {
color: #575c7a;
line-height: 1.5em;
font-family: arial;
font-size: 14px;
background: #fff url(../images/background-black-white.jpg) repeat-x 0px 0px;
}

.page {
max-width: 980px;
margin: 0px auto 0px auto;
position: relative;
background-color: #DDDDDF;
}

h1 {
font-size: 2em; font-weight: normal; color: #7A7979; margin: 0 0 .5em 0;
}

h2 {
font-size: 1.7em; margin: 0 0 1em 0;
}

h3 {
font-size: 1.5em; margin: 0 0 1em 0;
}

p {
margin: 0 0 .75em 0;
}

a {
color: #7A7979;
}

a:hover {
color: #009eff;
}

footer {
font-size: .85em; color: #7A7979; background-color: url(../images/background-black-white.jpg; padding: 10px 10px 10px 0px;
}

a.cta {
font-size: 40px;
}

Answer 1

您的问题很容易解决。您在a.cta样式之前稍微省略了背景样式中的右括号，这使得解析器在引用背景URL后假定所有样式。

@charset "UTF-8";

body {
color: #575c7a;
line-height: 1.5em;
font-family: arial;
font-size: 14px;
background: #fff url(../images/background-black-white.jpg) repeat-x 0px 0px;
}

.page {
max-width: 980px;
margin: 0px auto 0px auto;
position: relative;
background-color: #DDDDDF;
}

h1 {
font-size: 2em; font-weight: normal; color: #7A7979; margin: 0 0 .5em 0;
}

h2 {
font-size: 1.7em; margin: 0 0 1em 0;
}

h3 {
font-size: 1.5em; margin: 0 0 1em 0;
}

p {
margin: 0 0 .75em 0;
}

a {
color: #7A7979;
}

a:hover {
color: #009eff;
}

footer {
font-size: .85em; 
color: #7A7979; 
background/*-color -- Color doesn't take a url value*/: url(../images/background-black-white.jpg) 
/* YOU FORGOT THE CLOSING PARENTHESES */; 
padding: 10px 10px 10px 0px;
}

a.cta {
font-size: 40px;
}

<div class="page">
  <header>
    <a class="logo" href="#"></a>
  </header>
  <article>
    <h1>Welcome</h1>
    <p>Welcome to the site blah blah blahblah blah blahblah blah blahblah blah blah blah blah blahblah blah blahblah blah blahblah blah blahblah blah blahblah blah blah blah blah blahblah blah blah</p>
  </article>

  <div class="promo-container">
    <div class="promo">
      <div class="content">
        <h3><a href="#">Events</a></h3>
        <p>list of eventslist of eventslist of eventslist of eventslist of events list of eventslist of eventslist of eventslist of eventslist of events</p>
        <p><a class="cta" href="#">More info.</a>
        </p>
      </div>
    </div>
  </div>
  <div class="promo-container">
    <div class="promo">
      <div class="content">
        <h3><a href="#">Loyalty Cards</a></h3>
        <p>info about loyalty cardsinfo about loyalty cardsinfo about loyalty cards info about loyalty cardsinfo about loyalty cardsinfo about loyalty cards</p>

<!-- begin snippet: js hide: false console: true babel: false -->

Answer 2

如果我调用.cta类它可以工作，你只需要删除utf 8引用并为你的body和html标签使用正确的close标签：

body {
color: #575c7a;
line-height: 1.5em;
font-family: arial;
font-size: 14px;
background: #fff url(../images/background-black-white.jpg) repeat-x 0px 0px;
}

.page {
max-width: 980px;
margin: 0px auto 0px auto;
position: relative;
background-color: #DDDDDF;
}

h1 {
font-size: 2em; font-weight: normal; color: #7A7979; margin: 0 0 .5em 0;
}

h2 {
font-size: 1.7em; margin: 0 0 1em 0;
}

h3 {
font-size: 1.5em; margin: 0 0 1em 0;
}

p {
margin: 0 0 .75em 0;
}

a {
color: #7A7979;
}

.cta {
color: red;
}

<!doctype html>
<head>
    <meta http-equiv="content-type" content="text/html; charset=UTF=8">
    <meta name="viewport" content="width=device-width, maxium-scale=1.0, minimun-width=1.0,
    initial-width=1.0" />
    <title>Welcome to Drunken Anticz</title>
    <link rel="stylesheet" type="text/css" href="css/screen_style.css" />
    <link rel="stylesheet" type="text/css" href="css/screen_layout_large.css />
    <link rel="stylesheet" type="text/css" media="only screen and (min-width:50px) and 
    (max-width:500px)" href="css/scrren_layout_small.css" />
    <link rel="stylesheet" type="text/css" media="only screen and (min-width:501px) and 
    (max-width:750px)" href="css/scrren_layout_medium.css" />
    <!--[if lt IE 9]>
        <script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script>
    <![endif] -->
</head>
    <body>
        <div class="page">

            <header>
                <a class="logo" href="#"></a>
            </header>

            <article>
                <h1>Welcome</h1>
                <p>Welcome to the site blah blah blahblah blah blahblah blah blahblah blah blah
                blah blah blahblah blah blahblah blah blahblah blah blahblah blah blahblah blah blah
                blah blah blahblah blah blah</p>
            </article>

            <div class="promo-container">
                <div class="promo">
                    <div class="content">
                        <h3><a href="#">Events</a></h3>
                        <p>list of eventslist of eventslist of eventslist of eventslist of events
                        list of eventslist of eventslist of eventslist of eventslist of events</p>
                        <p><a class="cta" href="#">More info.</a></p>
                    </div>
                </div>
            </div>
            <div class="promo-container">
                <div class="promo">
                    <div class="content">
                        <h3><a href="#">Loyalty Cards</a></h3>
                        <p>info about loyalty cardsinfo about loyalty cardsinfo about loyalty cards
                        info about loyalty cardsinfo about loyalty cardsinfo about loyalty cards</p>
                        <p><a class="cta" href="#">More info.</a></p>
                    </div>
                </div>
            </div>
</body>
</html>

        <nav>
            <a href="#">Home</a>
            <a href="#">Event's</a>
            <a href="#">Book Us</a>
            <a href="#">Loyalty Card</a>
            <a href="#">Contact Us</a>
        </nav>

        </div>
    </body>

我的Css类不能使用我的html文件

2 个答案: