CSS 导航中使用的背景被添加到 body 顶部

Question

我有一个 header 在开始和以后的导航中进行，我在我的导航中添加了线性渐变背景，但它被添加到页面顶部。我正在使用 bootstrap 框架，我删除了字体文件夹中的所有字形并添加了 font-awesome 字体。帮助我这是我的第一个付费项目。 JS fiddle - https://jsfiddle.net/m1aeo6nx/

HTML

<div class="container">
        <header>
            <div class="col-md-7">
                <img src="img/logo.png" alt="Rashidamonirtrust logo" class="img-responsive">
            </div>

            <div class="col-md-4 col-md-offset-1">
                <ul class="header-icons-list">
                    <li>
                        <a href=""><i class="fa fa-home header-icons"></i></a>
                        <a href=""><i class="fa fa-sitemap header-icons"> </i></a>
                        <a href=""><i class="fa fa-envelope header-icons"> </i></a>
                    </li>

                    <li>
                        <a href="" class="header-icons-text">Home</a>
                        <a href="" class="header-icons-text">Sitemap</a>
                        <a href="" class="header-icons-text">Contact Us</a>
                    </li>

                    <li>
                        <a href=""><img src="img/donate.png" class="img-responsive donate-img" alt="donate "></a>
                    </li>
                </ul>
            </div>
        </header>

         <nav> 
            <ul>

                <li> <a href="#">Home</a> </li>
                <li> <a href="aboutus.html">About Us</a> </li>
                <li> <a href="whoweare.html">Who We Are</a> </li>
                <li> <a href="mission.html">Mission</a> </li>
                <li> <a href="activities.html">Activities</a> </li>
                <li> <a href="gallery.html">Gallery</a> </li>
                <li> <a href="donate.html">Donate</a> </li>
                <li> <a href="sitemap.html">Sitemap</a> </li>
                <li> <a href="contactus.html">Contact Us</a> </li>

            </ul>
        </nav>

    </div><!-- .container -->

CSS

<style>

        html{
            background: #E5E5E5;
        }

        body{
            font-family: "Helvetica Neue",Helvetica,Arial,sans-serif;
            background: none;
        }

        header .header-icons-list{
            list-style: none;
        }

        header .header-icons{
            color: #191918;
            font-size: 1.2em;
            margin-right: 25%;
            margin-top: 2%;
            list-style: none;
        }

        header .header-icons-text{
            margin-right: 12%;
        }

        header .donate-img{
            margin-top: 6%;

        }


        nav {
                width: 100%;
                height: 40px;
                background: -webkit-linear-gradient(#3f9a15, #388813, #3f9a15, #388813, #3f9a15);
                background: -o-linear-gradient(#3f9a15, #388813, #3f9a15, #388813, #3f9a15);
                background: linear-gradient(#3f9a15, #388813, #3f9a15, #388813, #3f9a15);
                border-radius: 6px;
            }

        nav ul{
            list-style: none;
        }

        nav ul li{
            margin-right: 5%;
             display: inline-block;
        }

    </style>

Answer 1

您的 header 仅包含浮动元素，因此您需要对其进行 clearfix。

见What is a clearfix?

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