    <style>

    /* ساختار کلی */
    body {
        font-family: Tahoma, Arial, sans-serif;
        background-color: #ffffff;
        margin: 0;
    }

    .main-container {
        display: flex;
        gap: 20px;
        padding: 20px;
        max-width: 88%;
        margin: auto;
    }

    /* سایدبار (دسکتاپ) */
    .sidebar {
        width: 250px;
        min-width: 250px;
        background: #fff;
        padding: 15px;
        border-radius: 12px;
        border: 1px solid #ddd;
        height: fit-content;
    }

    .cat-link {
        text-decoration: none;
        color: #333;
        display: block;
        padding: 10px;
        border-radius: 8px;
        transition: 0.3s;
    }

    .cat-link:hover {
        background-color: #008080;
        color: #fff;
        padding-right: 20px;
    }

    /* گرید آگهی‌ها */
    .ads-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 20px;
        flex-grow: 1;
    }

    .ad-card {
        background: #fff;
        border-radius: 12px;
        overflow: hidden;
        border: 1px solid #ddd;
        transition: 0.3s;
    }

    .ad-card:hover {
        transform: translateY(-5px);
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    }

    .ad-card img {
        width: 100%;
        height: 180px;
        object-fit: cover;
        display: block;
    }

    .ad-card .content {
        padding: 15px;
    }

    .ad-card h3 {
        margin: 0 0 10px 0;
        font-size: 16px;
        color: #333;
    }

    .ad-card a {
        text-decoration: none;
        color: inherit;
    }

    /* منوی موبایل */
    .mobile-menu-container {
        display: none;
        width: 100%;
        margin-bottom: 20px;
        position: relative;
    }

    .mobile-menu-trigger {
        background: #002e63;
        color: white;
        padding: 12px;
        border-radius: 8px;
        cursor: pointer;
        text-align: center;
    }

    .mobile-menu-content {
        display: none;
        background: #fff;
        border: 1px solid #002e63;
        width: 100%;
        position: absolute;
        z-index: 999;
    }

    .mobile-menu-content a {
        display: block;
        padding: 10px;
        text-decoration: none;
        color: #333;
        border-bottom: 1px solid #eee;
    }

    /* ریسپانسیو */
    @media (max-width: 768px) {
        .main-container {
            flex-direction: column;
        }

        .sidebar {
            display: none;
        }

        .mobile-menu-container {
            display: block;
        }
    }

    .ad-footer img {
        border: 1px solid #ddd;
    }

    .ad-card .content {
        min-height: 100px;
        /* برای جلوگیری از پرش ارتفاع */
    }

    </style>