/* roulang page: index */
/* Reset some default styles */
            body, h1, h2, h3, p, ul, li {
              margin: 0;
              padding: 0;
            }
            body {
              font-family: Arial, sans-serif;
              line-height: 1.6;
              background-color: #f4f4f4;
              color: #333;
            }
            .container {
              width: 80%;
              margin: 0 auto;
              padding: 20px;
              background-color: #fff;
              border-radius: 8px;
              box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
            }
            header {
              background-color: #333;
              color: #fff;
              padding: 10px 0;
              text-align: center;
              border-radius: 8px 8px 0 0;
            }
            header h1 {
              font-size: 2.5em;
            }
            nav ul {
              list-style: none;
              padding: 0;
              text-align: center;
            }
            nav li {
              display: inline;
              margin: 0 15px;
            }
            nav a {
              color: #fff;
              text-decoration: none;
              font-weight: bold;
              transition: color 0.3s ease;
            }
            nav a:hover {
              color: #ddd;
            }
            main {
              padding: 20px 0;
            }
            section {
              margin-bottom: 30px;
            }
            h2 {
              font-size: 2em;
              margin-bottom: 15px;
              border-bottom: 2px solid #ddd;
              padding-bottom: 5px;
            }
            .products {
              display: flex;
              flex-wrap: wrap;
              justify-content: space-around;
            }
            .product {
              width: 300px;
              margin-bottom: 20px;
              padding: 15px;
              border: 1px solid #ddd;
              border-radius: 8px;
              text-align: center;
              transition: box-shadow 0.3s ease;
            }
            .product:hover {
              box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
            }
            .product img {
              max-width: 100%;
              height: auto;
              border-radius: 4px;
              margin-bottom: 10px;
            }
            .product h3 {
              font-size: 1.5em;
              margin-bottom: 5px;
            }
            .product p {
              font-size: 1.1em;
              color: #666;
            }
            footer {
              background-color: #333;
              color: #fff;
              text-align: center;
              padding: 10px 0;
              border-radius: 0 0 8px 8px;
            }
            .adv {
              border: 1px solid #ddd;
              padding: 15px;
              border-radius: 8px;
              margin-bottom: 20px;
            }