我正在尝试从包含的html主题添加CSS。

当我添加我定义的加载菜单部分的主菜单函数时，我不知道如何包含CSS，因为它返回一个defultul 风格

注意：我正确地实现了我的风格，因为在我添加这个功能之前它一直有效。

<header class="header_area">
<div class="main_menu">
    <nav class="navbar navbar-expand-lg navbar-light">
        <div class="container box_1620">
            <a class="navbar-brand logo_h" href="index.html"><img src="img/logo.png" alt=""></a>
            <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
                <span class="icon-bar"></span>
                <span class="icon-bar"></span>
                <span class="icon-bar"></span>
            </button>

            <div class="collapse navbar-collapse offset" id="navbarSupportedContent">

                <?php

                if (has_nav_menu(\'primary\')) {
                    wp_nav_menu(array(
                            \'theme_location\' => \'primary\',
                            \'container\'      => false,
                            \'fallback_cb\'    => false,
                            \'depth\'          => 5
                    ));
                }

                ?> ...

我的基本功能：

function ju_setup_theme() {
register_nav_menu( \'primary\',
    __( \'Primary Menu\', \'lorahost\' )
);
}

第一部分改变了：

<div class="collapse navbar-collapse offset" id="navbarSupportedContent">
        <ul class="nav navbar-nav menu_nav justify-content-end">
          <li class="nav-item active"><a class="nav-link" href="index.html">Home</a></li> 
          <li class="nav-item"><a class="nav-link" href="feature.html">Features</a></li> 
          <li class="nav-item"><a class="nav-link" href="service.html">Service</a>
          <li class="nav-item"><a class="nav-link" href="pricing.html">Pricing</a>
          <li class="nav-item submenu dropdown">
            <a href="#" class="nav-link dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true"
              aria-expanded="false">Pages</a>
            <ul class="dropdown-menu">
              <li class="nav-item"><a class="nav-link" href="blog.html">Single Blog</a>                 
              <li class="nav-item"><a class="nav-link" href="blog-details.html">Blog Details</a>                 
            </ul>
                        </li>
          <li class="nav-item"><a class="nav-link" href="contact.html">Contact</a></li>
        </ul>

如何正确加载CSS？也许是因为争吵？

wp_nav_menu(array(
        \'theme_location\' => \'primary\',
        \'container\'      => \'div\', // default is div anyway, you set it false because you want to add ID, right?
        \'container_id\'   => \'container_id\', // container id here, css ID for container above

        // comment out if you need
        // \'menu_class\'  => \'menu-class-here\', // menu class
        // \'menu_id\'     => \'menu-id-here\',
        \'fallback_cb\'    => false,
        \'depth\'          => 5
));