建站顶部菜单简单html样式

.Design-Studio_menu {
    text-align: right;
    position: relative;
    z-index: 1;

}

.Design-Studio_menu ul {
    list-style: none;
    display: inline-block;
    padding: 0;
    margin: 0;
}

.Design-Studio_menu>ul>li {
    display: inline-block;
    position: relative;
    z-index: 1;
    margin-right:22px;
}
.Design-Studio_menu>ul>li>a {
    text-decoration: none;
    position: relative;
    display: block;
    padding: 10px 0;
    transition: .5s;
    color: #272727;
    font-size: 18px;
    font-weight:bold;
}
nav.Design-Studio_menu span {
    font-size: 11px;
}
.Design-Studio_menu ul .sub-menu {
    position: absolute;
    left: 0;
    top: 130%;
    width: 217px;
    text-align: left;
    background: #fff;
    padding: 0;
    margin: 0;
    z-index: 1;
    -webkit-box-shadow: 0px 1px 3px rgba(0, 0, 0, 0.3);
    box-shadow: 0px 1px 3px rgba(0, 0, 0, 0.3);
    transition: .5s;
    visibility: hidden;
    opacity: 0;
}

.Design-Studio_menu ul .sub-menu li {
    position: relative;
}
.Design-Studio_menu ul .sub-menu li a {
    text-decoration: none;
    display: block;
    padding: 12px 20px;
    margin: 0;
    line-height: 1.3;
    letter-spacing: normal;
    font-size: 16px;
    font-weight: 500;
    text-transform: capitalize;
    -webkit-transition: .1s;
    transition: .1s;
    visibility: inherit !important;
    color: #101210 !important;
}
.Design-Studio_menu ul li:hover>.sub-menu {
    visibility: visible;
    top: 100%;
    opacity: 1;
}

<nav class="Design-Studio_menu">
                            <ul class="nav_scroll">
                                <li> <a href="#" title="Home">Home</a></li>
                                <li> <a href="#" title="Home">Company</a></li>
                                <li> <a href="#" title="Home">Product <span><i class="fa fa-chevron-down"></i></span></a>
                                    <ul class="sub-menu">
                                                  <li class="">
                                                    <a href="#l" title="Bearings">Bearings</a>
                                                </li>                                                                                    
                                  
                                     </ul>
                                </li>
                                <li> <a href="#" title="Home">Service</a></li>
                                <li> <a href="#" title="Home">Success Stories</a></li>
                                
                             </ul>
                        </nav>