/* Camada específica da oferta de Matemática */
.hero-product:after{content:'+  −  ×  ÷';position:absolute;right:-5%;top:3%;font-weight:900;letter-spacing:7px;color:rgba(114,84,232,.16);font-size:20px;transform:rotate(8deg);z-index:-1}
.product-frame:before{content:'MATEMÁTICA NA PRÁTICA';position:absolute;display:none}
.preview-section .slide:nth-child(1){border-top:5px solid #7254e8}.preview-section .slide:nth-child(2){border-top:5px solid #f5b600}.preview-section .slide:nth-child(3){border-top:5px solid #16bca9}.preview-section .slide:nth-child(4){border-top:5px solid #f06464}.preview-section .slide:nth-child(5){border-top:5px solid #438fde}