.page-header {
            background: linear-gradient(-45deg, #0A2540, #005C97, #363795, #0A2540);
            background-size: 400% 400%;
            animation: skyToNavy 15s ease infinite;
            padding-top: 140px;
            padding-bottom: 80px;
            position: relative;
            color: #fff;
            text-align: center;
        }
        @keyframes skyToNavy {
            0% { background-position: 0% 50%; }
            50% { background-position: 100% 50%; }
            100% { background-position: 0% 50%; }
        }
        .page-header::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0; bottom: 0;
            background-image: radial-gradient(rgba(255,255,255,0.1) 1px, transparent 1px);
            background-size: 20px 20px;
            opacity: 0.5;
            pointer-events: none;
        }
        .gradient-text {
            background: linear-gradient(90deg, #00B4D8, #F2A900);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        
        .cert-card {
            background: #fff;
            border-radius: 24px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
            padding: 40px 30px;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        .cert-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 40px rgba(0,0,0,0.1);
        }
        .cert-card-logo {
            max-height: 80px;
            object-fit: contain;
            margin-bottom: 30px;
            background: #0A2540;
            padding: 15px 25px;
            border-radius: 12px;
        }
        .cert-features {
            list-style: none;
            padding: 0;
            margin: 0 0 30px 0;
            width: 100%;
            text-align: left;
        }
        .cert-features li {
            margin-bottom: 15px;
            color: #495057;
            font-family: 'Inter', sans-serif;
            display: flex;
            align-items: center;
        }
        .cert-features li i {
            color: #00B4D8;
            margin-right: 12px;
            font-size: 1.2rem;
        }
        .btn-consultar {
            background-color: #00B4D8;
            color: #fff;
            border-radius: 50rem;
            padding: 12px 30px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s ease;
            margin-top: auto;
        }
        .btn-consultar:hover {
            background-color: #0A2540;
            color: #fff;
        }
        
        .whatsapp-float {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background-color: #25d366;
            color: #FFF;
            border-radius: 50px;
            text-align: center;
            font-size: 30px;
            box-shadow: 2px 2px 3px #999;
            z-index: 1000;
            width: 60px;
            height: 60px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform 0.3s ease;
            text-decoration: none;
        }
        .whatsapp-float:hover {
            transform: scale(1.1);
            color: #FFF;
        }
        .sistema-contable-float {
            position: fixed;
            bottom: 100px;
            right: 30px;
            background-color: #0A2540;
            color: #FFF;
            border-radius: 50px;
            text-align: center;
            font-size: 24px;
            box-shadow: 2px 2px 3px #999;
            z-index: 1000;
            width: 60px;
            height: 60px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform 0.3s ease;
            text-decoration: none;
        }
        .sistema-contable-float:hover {
            transform: scale(1.1);
            color: #F2A900;
        }

        /* ===== RESPONSIVE MOBILE ===== */
        @media (max-width: 768px) {
            .page-header {
                padding-top: 120px;
                padding-bottom: 50px;
            }
            .page-header h1 {
                font-size: 1.6rem;
            }
            .cert-card {
                padding: 30px 20px;
            }
            .cert-card-logo {
                max-height: 60px;
                padding: 12px 20px;
            }
        }

        @media (max-width: 576px) {
            .page-header {
                padding-top: 100px;
                padding-bottom: 40px;
            }
            .page-header h1 {
                font-size: 1.4rem;
            }
            .cert-features li {
                font-size: 0.9rem;
            }
        }