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我正在使用媒体查询在不同的设备上修改我的 css，但是，当我对第二个媒体查询（最大宽度：767）进行更改时，它会覆盖移动设备的 css。有人知道为什么会这样吗？

这是CSS：

/* Mobile */

@media only screen and (min-width: 320px) and (max-width: 480px) {
  /* Style adjustments for viewports 480px and under go here */
    .row {
        text-align: center !important;
        margin-left: auto !important;
        margin-right: auto !important;
        width: 98% !important;
        padding-left: 1% !important;
        padding-right: 1% !important;
    }

    span {
        letter-spacing: 20px !important;
    }

    .nav li {
        margin-right: 22px !important;
        text-align: center !important;
        letter-spacing: 2px !important;
    }

    ul li:last-child { 
        margin-right: 0px !important; 
    }

    .intro h1 {
        font-size: 44px !important;
        margin-bottom: -40px !important;
    }

    .intro img {
        visibility: hidden !important;
    }

    .dotted_line {
        visibility: hidden !important;
    }

    .cta {
        height: 450px !important;
        width: 330px !important;
        margin-top: -30px !important;
        margin-bottom: -250px !important;
    }

    .cta h2 {
        font-size: 20px !important;
        margin-left: 5px !important;
        margin-top: -10px !important;
    }

    .cta p {
        font-size: 16px !important;
        margin-left: 5px !important;
        margin-top: -10px !important;
    }

    .home_form {
        margin-left: 20px !important;
    }

    .left input {
        width: 280px !important;
        margin-bottom: 10px !important;
    }

    .right {
        width: 280px !important;
        float: none !important;
    }

    .right textarea {
        height: 120px !important;
        width: 285px !important;
    }

    .submit {
        background: url('../img/submit_btn.png') no-repeat !important;
        float: left !important;
        margin-top: 20px !important;
    }

    .social {
        visibility: hidden !important;
    }

    .social_icons {
        margin-right: auto;
        margin-left: auto;
    }

    footer .left p {
        width: 330px !important;
    }

    footer .middle {
        visibility: hidden;
    }

    footer .right {
        visibility: hidden;
    }

    .copyright {
        margin-left: 10px !important;
        margin-bottom: -40px;
    }
}

@media only screen and (max-width: 767px) {
    body { -webkit-text-size-adjust: none; -ms-text-size-adjust: none; width: 100%; min-width: 0; margin-left: 0; margin-right: 0; padding-left: 0; padding-right: 0; }

    .container { min-width: 0; margin-left: 0px; margin-right: 0px; }
    .row { width: 100%; min-width: 0; margin-left: 0; margin-right: 0; }
    .row .row .column, .row .row .columns { padding: 0; }
    .column, .columns { width: auto !important; float: none; margin-left: 0; margin-right: 0; }
    .column:last-child, .columns:last-child { margin-right: 0; float: none; }
    .row .row .column, .row .row .columns { padding: 0; }
    .column, .columns { width: auto !important; float: none; margin-left: 0px; margin-right: 0px; }
    .column:last-child, .columns:last-child { margin-right: 0; float: none; }
    [class*="column"] + [class*="column"]:last-child { float: none; }
    [class*="column"]:before, [class*="column"]:after { display: table; }
    [class*="column"]:after { clear: both; }


    .push_one, .push_two, .push_three, .push_four, .push_five, .push_six, .push_seven, .push_eight, .push_nine, .push_ten, .push_eleven, .centered { margin-left: 0% !important; }

    span {
        letter-spacing: 40px !important;
    }

    .nav li {
        margin-right: 62px !important;
        text-align: center !important;
        letter-spacing: 6px !important;
    }

    ul li:last-child { 
        margin-right: 0px !important; 
    }

    .intro h1 {
        font-size: 44px !important;
        margin-bottom: -40px !important;
    }

    .intro img {
        visibility: hidden !important;
    }

    .dotted_line {
        visibility: hidden !important;
    }

    .cta {
        height: 450px !important;
        width: 330px !important;
        margin-top: -30px !important;
        margin-bottom: -250px !important;
    }

    .cta h2 {
        font-size: 20px !important;
        margin-left: 5px !important;
        margin-top: -10px !important;
    }

    .cta p {
        font-size: 16px !important;
        margin-left: 5px !important;
        margin-top: -10px !important;
    }

    .home_form {
        margin-left: 20px !important;
    }

    .left input {
        width: 280px !important;
        margin-bottom: 10px !important;
    }

    .right {
        width: 280px !important;
        float: none !important;
    }

    .right textarea {
        height: 120px !important;
        width: 285px !important;
    }

    .submit {
        background: url('../img/submit_btn.png') no-repeat !important;
        float: left !important;
        margin-top: 20px !important;
    }

    .social {
        visibility: hidden !important;
    }

    .social_icons {
        margin-right: auto;
        margin-left: auto;
    }

    footer .left p {
        width: 330px !important;
    }

    footer .middle {
        visibility: hidden;
    }

    footer .right {
        visibility: hidden;
    }

    .copyright {
        margin-left: 10px !important;
        margin-bottom: -40px;
    }

}

除了跨度和 .nav li 之外，我没有对第二个媒体查询进行很多调整，但这足以在标题和导航中看到问题。

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2 回答 2

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因为@media only screen and (max-width: 767px)还寻址屏幕宽度为320px <= x <= 480px. 你需要在min-width: 481px这里设置一个。

于 2013-03-19T17:35:46.917 回答
0

是的，您可能需要在第二个媒体查询中使用最小宽度，因为满足第一个媒体查询条件的所有设备将自动满足第二个条件。

于 2013-03-19T17:35:54.703 回答