```smarty
<div class="avopac-messagerie-contact">

    <style>
        .avopac-messagerie-contact {
            max-width: 1000px;
            width: 100%;
            margin: 40px auto;
            padding: 40px;
            background: linear-gradient(145deg, #050505, #151515);
            border: 1px solid #b8860b;
            border-radius: 20px;
            box-shadow: 0 10px 40px rgba(0,0,0,.5);
            color: #f5d77a;
            text-align: center;
        }

        .avopac-messagerie-contact h1 {
            margin: 0 0 25px;
            font-size: 32px;
            font-weight: 700;
            color: #d4af37;
            text-shadow: 0 0 10px rgba(212,175,55,.25);
        }

        .avopac-messagerie-contact h1 a {
            color: #d4af37 !important;
            text-decoration: none;
        }

        .avopac-messagerie-contact h1 a:hover {
            color: #fff !important;
        }

        .avopac-messagerie-contact h3 {
            margin: 0 auto 30px;
            padding: 20px;
            max-width: 850px;
            background: #0d0d0d;
            border: 1px solid #8c6b1f;
            border-radius: 14px;
            color: #f5d77a;
            font-size: 21px;
            font-weight: 600;
            box-shadow: 0 4px 20px rgba(0,0,0,.4);
        }

        .avopac-messagerie-contact form {
            max-width: 850px;
            margin: 0 auto;
        }

        .avopac-messagerie-contact .form-group {
            margin-bottom: 25px;
        }

        .avopac-messagerie-contact label {
            display: block;
            margin-bottom: 12px;
            font-size: 19px;
            font-weight: 700;
            color: #d4af37;
        }

        .avopac-messagerie-contact textarea {
            width: 100%;
            min-height: 260px;
            padding: 18px;
            border: 1px solid #8c6b1f;
            border-radius: 14px;
            background: #080808;
            color: #fff;
            font-size: 16px;
            line-height: 1.6;
            resize: vertical;
            box-shadow: inset 0 2px 10px rgba(0,0,0,.6);
        }

        .avopac-messagerie-contact textarea::placeholder {
            color: #999;
        }

        .avopac-messagerie-contact textarea:focus {
            border-color: #d4af37;
            outline: none;
            box-shadow: 0 0 0 3px rgba(212,175,55,.18);
        }

        .avopac-messagerie-contact button {
            display: inline-block;
            margin-top: 10px;
            padding: 15px 35px;
            border: 1px solid #d4af37;
            border-radius: 12px;
            background: linear-gradient(135deg, #d4af37, #a67c00);
            color: #080808;
            font-size: 17px;
            font-weight: 700;
            cursor: pointer;
            transition: all .2s ease;
            box-shadow: 0 5px 20px rgba(212,175,55,.2);
        }

        .avopac-messagerie-contact button:hover {
            background: linear-gradient(135deg, #f5d77a, #d4af37);
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(212,175,55,.35);
        }

        /* =====================================================
   AUTRES ANNONCES
   ===================================================== */

.avopac-other-products {
    ...
}

.avopac-other-products h2 {
    ...
}

.avopac-other-products-list {
    ...
}

.avopac-other-product {
    ...
}

.avopac-other-product:hover {
    ...
}

.avopac-other-product-name {
    ...
}

.avopac-other-product-price {
    ...
}

        @media (max-width: 600px) {

            .avopac-messagerie-contact {
                margin: 20px auto;
                padding: 25px 15px;
                border-radius: 15px;
            }

            .avopac-messagerie-contact h1 {
                font-size: 25px;
            }

            .avopac-messagerie-contact h3 {
                font-size: 17px;
            }

            .avopac-messagerie-contact textarea {
                min-height: 220px;
            }

            .avopac-messagerie-contact button {
                width: 100%;
            }

            .avopac-other-products-list {
                grid-template-columns: 1fr;
            }
        }
    </style>


    
    
        <div style="text-align:center; margin-bottom:25px;">

            
                <img
                    src="/modules/avopacvan/img/uploads/avatar_10_1787241033.jpeg?1787675634"
                    alt="Milodios"
                    style="width:100px;height:100px;object-fit:cover;border-radius:50%;margin-bottom:10px;"
                >

            
            
                <div style="font-size:22px;font-weight:700;color:#d4af37;">
                    Milodios
                </div>

            
        </div>

    

    
    
        <h1>
            <a
                href="https://avopac.net/207-stand-de-productions-culturelles-1"
            >
                🏪 Voir son Stand en Ligne
            </a>
        </h1>

    

    
    <h3>
        📦 Des principes de l&#039;économie politique et de l&#039;impôt - Ricardo - Livre
    </h3>


    
    <form
        method="post"
        action="https://avopac.net/module/avopacmessagerie/contact"
    >

        <input
            type="hidden"
            name="id_product"
            value="553"
        >

        <input
            type="hidden"
            name="id_seller"
            value="10"
        >


        <div class="form-group">

            <label for="message">
                Votre message
            </label>

            <textarea
                id="message"
                name="message"
                rows="10"
                class="form-control"
                placeholder="Écrivez votre message au vendeur..."
                required
            ></textarea>

        </div>


        <button
            type="submit"
            name="submitContactMessage"
            class="btn btn-primary"
        >
            ✉️ Envoyer le message
        </button>

    </form>


    
    
    <div class="avopac-other-products">

        <h2>
            🛍️ Autres Annonces en Ligne
        </h2>

        <div class="avopac-other-products-list">

            
                <a
                    href="https://avopac.net/stands-on-line/4469-test-19.html"
                    class="avopac-other-product"
                >

                    <div class="avopac-other-product-content">

                        <div class="avopac-other-product-name">
                            test 19
                        </div>

                        <div class="avopac-other-product-bottom">

                            <span class="avopac-other-product-price">
                                5.00 €
                            </span>

                            <span class="avopac-other-product-arrow">
                                Voir l'annonce →
                            </span>

                        </div>

                    </div>

                </a>

            
        </div>

    </div>


</div>
```