HTML/CSS 对齐两个输入和下面的文本

Question

我试图将两个输入表单放在一起，并在它们下面放置一些文本。不知怎的，它永远不会正确对齐。这张图显示了我正在尝试做的事情:

HTML:

<form action="#" class="cleanForm" method="POST">
    <fieldset>
        <input type="text" name="firstname" placeholder="first name" required>
        <em>Please enter your first name</em>

        <input type="text" name="lastname" placeholder="last name" required>
        <em>Enter your last name</em>

        <input type="email" name="email"  placeholder="e-mail" required>
        <em>Enter your e-mail address</em>

        <input type="email" name="email2" placeholder="re-enter e-mail" required>
        <em>Re-enter your e-mail address</em>

        <input type="password" name="password" placeholder="password" required>
        <em>Enter a password between 8 and 20 digits</em>

        <input type="password" name="password2" placeholder="re-enter password" required />
        <em>Re-enter the password</em>

        <p>
            <input type="radio" name="gender" value="Female" checked>
            <label for="female">Female</label>

            <input type="radio" name="gender" value="Male">
            <label for="male">Male</label>
        </p>

        <p>
            <input type="checkbox" id="agree-TOS">
            <label for="agree-TOS">I have read and agree to the <a href="#">Terms of Service</a>.</label>
        </p>

        <input type="submit" value="Create account">
    </fieldset>
</form>

CSS:

form.cleanForm {
    width:700px;
    margin:0 auto;
}

form.cleanForm p {
    margin-bottom:15px;
}

input[type="email"], input[type="password"], input[type="text"]  {
    font-family: Arial, Sans-Serif;
    font-size: 18px;
    color: #adadad;
    padding: 10px;
    outline:none;   
    float:left;
    border: solid 1px #adadad;
    width: 230px;
    transition: all 2s ease-in-out;
    -webkit-transition: all 2s ease-in-out;
    -moz-transition: all 2s ease-in-out;
    -moz-border-radius: 8px;
    -webkit-border-radius: 8px;
    border-radius: 8px;
    -moz-box-shadow:inset 0 0 5px 5px #E6E6E6;
    -webkit-box-shadow:inset 0 0 5px 5px #E6E6E6;
    box-shadow:inset 0 0 5px 5px #E6E6E6;
    clear: right;
}

input[type="email"]:focus, input[type="email"]:hover, input[type="password"]:focus,
input[type="password"]:hover, input[type="text"]:focus, input[type="text"]:hover {
    border:1px solid #FF003F;   
} 
form.cleanForm em {
    font-size:12px;
}

Answer 1

您正在申请float:left到<input> s，但不是<em> s。这就是为什么所有字段都被推到左侧，而标签保留在普通页面流中。

一种可能的解决方案是将它们都包装在 <div> 中并应用 float对此:

HTML:

<div class="field">
    <input type="text" name="firstname" placeholder="first name" required />
    <em>Please enter your first name</em>
</di>

CSS:

div.field {
    float: left;
}

此外，使用 <label> 在语义上会更正确。而不是<em> .