l {
      color: #adb5bd;
      line-height: 1.6;
    }
  </style>
</head>
<body>
  <!-- 导航栏 -->
  <nav class="navbar navbar-expand-lg navbar-light bg-white shadow-sm fixed-top">
    <div class="container">
      <a class="navbar-brand fw-bold" href="#">
        <img src="logo.svg" alt="Logo" style="height:32px;vertical-align:middle;margin-right:8px;">{{ site_name }}
      </a>
      <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarNav">
        <span class