移动端hamburger菜单点击后列表项无法换行显示问题求助

问题 #

屏幕宽度进入700px断点后，点击汉堡按钮触发transition效果，导航列表项仍保持横向排列，未实现预期的单独成行显示。

原因 #

全局样式中.nav-links .navbar1 ul设置了display: flex（默认横向布局），媒体查询内仅修改了li的样式，未覆盖ul的flex方向属性，导致列表依然横向排列。

修复步骤 #

在@media (max-width:700px)媒体查询中，添加对.nav-links .navbar1 ul的样式修改，将flex方向改为纵向，同时可添加间距优化布局：

@media (max-width:700px) {
    /* 其他原有样式... */
    
    /* 修复列表纵向排列 */
    .nav-links .navbar1 ul {
        flex-direction: column;
        gap: 1rem; /* 可选：增加列表项间距 */
    }
    
    .navbar1 ul li {
        padding: 0.8rem 0; /* 可选：增加内边距提升点击体验 */
    }
    
    /* 其他原有样式... */
}

修改后的完整CSS代码 #

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
.navbar {
    display: flex;
    height: 70px;
    width: 100%;
    padding: 19px 30px;
    background-color: #1b4cd3;
    position: relative;
}
.navbar .nav-header {
    display: inline;
}
.navbar .nav-header .nav-logo {
    display: inline-block;
    margin-top: -7px;
}
.nav-links .navbar1 ul {
    display: flex;
}
.navbar1 ul li {
    list-style: none;
}
/* responsive navbar toggle button */
.navbar #nav-check,
.navbar .nav-btn {
    display: none;
}
@media (max-width:700px) {
    .navbar .nav-btn {
        display: inline-block;
        position: absolute;
        top: 0px;
        right: 300px;
    }
    .navbar .nav-btn label {
        display: inline-block;
        flex-direction: column;
        width: 80px;
        height: 70px;
        padding: 25px;
    }
    .navbar .nav-btn label span {
        display: flex;
        flex-direction: column;
        height: 10px;
        width: 25px;
        border-top: 3px solid #eee;
    }
    .navbar .nav-btn label:hover,
    .navbar #nav-check:checked~.nav-btn label {
        transition: all 0.5s ease;
        flex-direction: column;
    }
    .navbar .nav-links {
        position: absolute;
        display: block;
        text-align: center;
        width: 90%;
        background-color: rgb(9, 14, 90);
        transition: all 0.3s ease-in;
        overflow-y: hidden;
        top: 70px;
    }
    /* 修复列表纵向排列 */
    .nav-links .navbar1 ul {
        flex-direction: column;
        gap: 1rem;
    }
    .navbar1 ul li {
        padding: 0.8rem 0;
    }
    .navbar #nav-check:not(:checked)~.nav-links {
        height: 0px;
    }
    .navbar #nav-check:checked~.nav-links {
        height: calc(100vh - 70px);
        overflow-y: auto;
        display: block;
    }
    .navbar .btn {
        padding: 10px 40px;
        margin: 20px;
        font-size: 18px;
        background-color: rgb(9, 14, 90);
        display: inline;
        color: white;
    }
    .navbar .btn .button1 {
        display: inline-block;
        color: white;
    }
    /* Responsive dropdown code */
    .navbar .nav-links .dropdown,
    .navbar .nav-links .dropdown2 {
        float: none;
        width: 100%;
    }
    .navbar .nav-links .drop-content,
    .navbar .nav-links .drop-content2 {
        position: relative;
        background-color: rgb(220, 220, 250);
        top: 0px;
        left: 0px;
    }
    .navbar .nav-links .drop-content a {
        color: rgb(9, 14, 90);
    }
}
/* Dropdown menu CSS code */
.dropdown {
    position: relative;
    display: inline-block;
}
.drop-content,
.drop-content2 {
    display: none;
    position: absolute;
    background-color: #1b4cd3;
    min-width: 120px;
    font-size: 16px;
    top: 34px;
    z-index: 1;
    box-shadow: 0px 10px 25px rgba(0, 0, 0, 0.4);
}
.dropdown:hover .drop-content,
.dropdown2:hover .drop-content2 {
    display: block;
}
.drop-content a {
    padding: 12px 10px;
    border-bottom: 1px solid rgb(197, 197, 250);
    display: block;
    transition: all 0.5s ease !important;
}
.dropBtn .drop-content a:hover {
    background-color: rgb(230, 230, 230);
}
.dropdown:hover .dropBtn,
.dropdown2:hover .dropBtn2 {
    background-color: rgba(0, 0, 0, 0.3);
}
.dropdown2 .drop-content2 {
    position: absolute;
    left: 120px;
    top: 126px;
}
.dropBtn2 i {
    margin-left: 15px;
}

内容的提问来源于stack exchange，提问作者Prabhjot Aulakh