/* ≤ 576px - Mobile nhỏ */
@media (max-width: 576px) {
    .group-btn-1 {
        display: none;
    }

    .group-btn-2 {
        display: block !important;
    }

    .search-box {
        display: none;
    }

    .icon-search-box {
        display: block !important;
    }

    .logo img {
        width: 100px !important;
        height: 60px !important;
        margin-left: 40% !important;
    }

    .icon-cart {
        width: 30px;
        height: 30px;
    }

    .cart-icon {
        margin-right: 10px;
    }

    .icon-login {
        width: 30px;
        height: 30px;
    }

    .icon-register {
        width: 30px;
        height: 30px;
    }

    .group-btn-2 a {
        display: inline-block;
        margin: 0;
    }

    .footer {
        padding: 20px !important;
        padding-bottom: 100px !important;
    }

    .footer-img {
        display: none;
    }

    .promo-image img {
        display: none;
    }

    .promo-banner {
        padding: 30px;
        /*margin-top: 0;*/
    }

    .promo-text {
        max-width: 100%;
        margin-left: 0;
    }

    .promo-text h2 {
        width: 100%;
        font-size: 25px;
        margin-bottom: 30px;
        line-height: 40px;
        height: auto;
    }

    .promo-button {
        font-size: 15px;
    }

    .support-bar {
        width: 100%;
    }

    .follow-box {
        margin-left: 0;
    }

    .custom-dots button {
        width: 8px;
        height: 15px;
        margin: 0 3px;
    }

    .mySwiper .swiper-pagination-bullet {
        width: 10px;
        height: 10px;
        margin: 0 3px;
    }

    .section-heading {
        font-size: 30px;
        line-height: 1;
    }

    .section-subtitle {
        font-size: 15px;
        margin-bottom: 20px !important;
    }

    .feedback-title {
        font-size: 28px;
        margin-top: 10px;
    }

    .icon-feedback {
        width: 30px;
    }

    .box-btn {
        position: relative;
    }

    .group-icon-feedback {
        display: flex;
        justify-content: center;
        margin-top: 20px;
    }

    .stat-description {
        font-size: 15px;
        line-height: 22px;
    }

    .stat-number {
        font-size: 25px;
    }

    .calendar-text {
        font-size: 25px;
        line-height: 35px;
        margin-top: 0;
    }

    .calendar-text-p {
        font-size: 15px;
    }

    .formula-text {
        font-size: 28px;
        line-height: 36px;
    }

    .service-title {
        font-size: 25px;
    }

    .footer-column h3 {
        font-size: 30px;
    }

    .footer-column ul li a {
        font-size: 15px;
    }

    .footer-column p {
        font-size: 15px;
    }

    .text-footer-span {
        font-size: 15px;
    }

    .follow-box h3 {
        font-size: 28px;
    }

    .follow-box p {
        width: 100%;
        font-size: 15px;
    }

    .title-course-detail {
        font-size: 25px;
        line-height: 35px;
    }

    .description-course-detail {
        font-size: 15px;
    }

    .title-course-detail-2 {
        font-size: 20px;
    }

    .calendar-course-detail h2 {
        font-size: 20px;
    }

    .calendar-course-detail p {
        font-size: 15px;
    }

    .description-left ul li {
        font-size: 15px;
    }

    .content-course-off {
        margin-top: 35px;
        padding-bottom: 60px;
    }

    .form-left-register h2 {
        font-size: 24px;
        margin-bottom: 0;
    }

    .form-left-register p {
        font-size: 18px;
        /*margin-bottom: 35px;*/
    }

    .div-item h3 {
        font-size: 17px !important;
    }

    .div-item h4 {
        font-size: 24px !important;
    }

    .detail-product {
        padding: 15px;
    }

    .detail-product h3 {
        font-size: 25px;
        line-height: 35px;
    }

    .detail-product-p {
        font-size: 15px;
        margin-top: 0;
    }

    .detail-product h4 {
        font-size: 25px;
    }

    .span-1 {
        font-size: 23px;
    }

    .span-2 {
        font-size: 20px;
    }

    .span-3 {
        font-size: 23px;
    }

    .group-btn-detail-product {
        margin: 30px 0;
        display: flex;
        justify-content: space-between;
    }

    .btn-detail-1 {
        width: 47% !important;
        font-size: 25px !important;
    }

    .btn-detail-2 {
        width: 47% !important;
        font-size: 25px !important;
    }

    .span-5 {
        font-size: 15px;
    }

    .div-info-product-1 ul li {
        margin-bottom: 10px;
        font-size: 16px;
    }

    .div-info-zalo {
        display: none;
    }

    .detail-content-product-btn-1 {
        font-weight: 500;
        font-size: 25px;
        padding: 10px 20px;
    }

    .detail-content-product-btn-2 {
        font-size: 25px;
        margin-left: 0;
        padding: 10px 15px;
    }

    #myTab {
        display: flex;
        justify-content: space-between;
    }

    .div-info-2 {
        margin-top: 20px;
        padding: 20px;
        font-size: 15px;
    }

    .div-products h4 {
        font-size: 27px;
    }

    .bread-1 {
        font-size: 15px;
    }

    .bread-2 {
        font-size: 15px;
    }

    .bread-3 {
        font-size: 15px;
    }

    .span-4 {
        font-size: 25px;
    }

    .card-left {
        padding-right: 10px;
    }

    .detail-product-card a {
        font-size: 17px;
        line-height: 28px;
    }

    .detail-product-card h4 {
        font-size: 15px;
        line-height: 15px;
    }

    .class-quantity .span-4 {
        font-size: 20px;
    }

    #myTabCourseTrial {
        display: none;
    }

    #myTabContent {
        display: none;
    }

    .footer-container {
        gap: 0 !important;
    }

    .footer-bottom {
        margin-right: 0 !important;
    }

    .modal-content-pay-confirm {
        width: 100% !important;
        /*top: 75% !important;*/
        /*left: 53% !important;*/
        padding: 5px !important;
        height: calc(100vh - 200px);
        overflow: auto !important;
    }

    .modal-thanhtoan-oke {
        width: 80%;
        height: auto;
    }

    .modal-thanhtoan-oke p {
        font-size: 16px;
        line-height: 5px;
        margin: 0;
    }

    .modal-thanhtoan-oke h3 {
        font-size: 14px;
        line-height: 25px;
        margin-top: 20px;
    }

    .modal-thanhtoan-oke button {
        width: 90px;
        font-size: 15px;
        line-height: 15px;
        margin-top: 10px;
        padding: 8px;
    }

    .modal-content {
        height: auto;
    }

    .modal-content h2 {
        font-size: 22px;
        line-height: 22px;
        margin: 0 0 20px;
    }

    .btn-sale-modal {
        font-size: 15px;
        line-height: 18px;
    }

    .btn-chat-modal {
        font-size: 15px;
        line-height: 16px;
    }

    .info-customer-pay h4 {
        font-size: 20px;
    }

    .div-item-pay {
        border-radius: 10px;
        padding: 7px 13px;
        margin-bottom: 9px;
    }

    .div-item-pay p {
        font-size: 12px;
        line-height: 19px;
        margin-right: 5px;
    }

    .div-item-pay span {
        font-size: 12px;
        line-height: 22px;
    }

    .info-course-pay h4 {
        font-size: 15px;
    }

    .info-pay-modal {
        margin-top: 15px;
        margin-bottom: 10px;
        padding: 10px 20px;
    }

    .info-pay-modal p {
        font-size: 13px;
    }

    .info-pay-modal span {
        font-size: 13px;
    }

    .btn-pay-modal {
        font-size: 13px;
        padding: 10px 15px;
    }

    .div-intro-1 {
        display: inline-block;
        margin: 0;
    }

    .div-intro-1 img {
        width: 100%;
        height: auto;
    }

    .div-intro-item-01 {
        padding: 20px;
        border-radius: 15px;
    }

    .div-intro-item-01 h3 {
        font-size: 16px;
    }

    .div-intro-item-01 h2 {
        font-size: 30px;
        line-height: 35px;
    }

    .div-intro-content-1 {
        font-size: 15px;
        margin-bottom: 15px;
    }

    .div-intro-content-2 {
        font-size: 14px;
        line-height: 28px;
        margin-top: 10px;
    }

    .div-intro-2 {
        margin-top: 50px;
    }

    .div-intro-2 h1 {
        font-size: 30px;
        line-height: 30px;
    }

    .div-intro-2 h4 {
        font-size: 16px;
        line-height: 25px;
    }

    .div-intro-2 h6 {
        font-size: 15px;
    }

    .div-intro-2-content {
        padding-right: 12px;
    }

    .div-intro-3 h1 {
        font-size: 30px;
        line-height: 40px;
    }

    .div-intro-3 p {
        font-size: 15px;
        line-height: 25px;
    }

    .item-intro-3 h5 {
        font-size: 18px;
    }

    .item-intro-3 p {
        font-size: 15px;
    }

    .item-4-01 h1 {
        font-size: 30px;
        line-height: 40px;
    }

    .item-4-01 h3 {
        font-size: 17px;
    }

    .item-4-01 ul li {
        font-size: 15px;
        line-height: 30px;
    }

    .item-4-02 h3 {
        font-size: 17px;
    }

    .item-4-02 ul li {
        font-size: 15px;
        line-height: 30px;
    }

    .item-4-02 p {
        font-size: 15px;
        line-height: 30px;
    }

    .div-policy {
        font-size: 15px;
        line-height: 30px;
    }

    .div-policy h1 {
        font-size: 20px;
        line-height: 20px;
    }

    .item-product-card-img {
        margin-right: 12px;
        display: flex;
        overflow: hidden;
    }

    .item-product-card-img a {
        width: 120px;
        height: 120px;
    }

    .item-product-card-img img {
        border-radius: 10px;
    }

    .card-left-course {
        margin-bottom: 0;
    }

    #voucherModalLabel {
        font-size: 17px;
    }

    .modal-content-voucher {
        padding: 10px;
    }

    .modal-content-voucher p {
        font-size: 12px;
    }

    .box-voucher {
        width: 90px;
        padding: 10px;
        margin-right: 8px;
        font-size: 12px;
    }

    .circle-white {
        margin-right: -68px;
        width: 12px;
        height: 12px;
    }

    .content-voucher {
        font-size: 13px;
    }

    .custom-radio-voucher {
        width: 17px;
        height: 17px;
    }

}

/*  ≤ 768px - Tablet */
@media (min-width: 577px) and (max-width: 768px) {
    .item-product-card-img a {
        width: 150px;
        height: 150px;
    }

    .div-intro-1 {
        display: inline-block;
        margin: 0;
    }

    .div-intro-1 img {
        margin-left: 20%;
    }

    .modal-content-pay-confirm {
        width: 80% !important;
        /*top: 50% !important;*/
        /*left: 50% !important;*/
        padding: 10px !important;
        height: calc(100vh - 200px);
        overflow: auto !important;
    }

    .modal-content-pay {
        height: calc(80vh - 200px);
        overflow: auto !important;
    }

    .group-btn-1 {
        display: none;
    }

    .group-btn-2 {
        display: block !important;
    }

    .search-box {
        display: none;
    }

    .icon-search-box {
        display: block !important;
    }

    .logo img {
        width: 100px !important;
        height: 60px !important;
        margin-left: 40% !important;
    }

    .icon-cart {
        width: 30px;
        height: 30px;
    }

    .cart-icon {
        margin-right: 10px;
    }

    .icon-login {
        width: 30px;
        height: 30px;
    }

    .icon-register {
        width: 30px;
        height: 30px;
    }

    .group-btn-2 a {
        display: inline-block;
        margin: 0;
    }

    .footer {
        padding: 35px !important;
        padding-bottom: 100px !important;
    }

    .footer-follow {
        margin-top: 65px;
    }

    .promo-image img {
        width: 375px;
        margin-top: -125px;
        margin-right: -30px;
    }

    .promo-banner {
        padding: 30px;
        /*margin-top: 0;*/
    }

    .promo-text {
        max-width: 100%;
        margin-left: 0;
    }

    .promo-text h2 {
        width: 100%;
        font-size: 25px;
        margin-bottom: 30px;
        line-height: 40px;
        height: auto;
    }

    .promo-button {
        font-size: 15px;
    }

    .support-bar {
        width: 100%;
    }

    .follow-box {
        margin-left: 0;
    }

    .custom-dots button {
        width: 8px;
        height: 15px;
        margin: 0 3px;
    }

    .mySwiper .swiper-pagination-bullet {
        width: 15px;
        height: 15px;
        margin: 0 3px;
    }

    .section-heading {
        font-size: 30px;
        line-height: 1;
    }

    .section-subtitle {
        font-size: 15px;
        margin-bottom: 20px !important;
    }

    .feedback-title {
        font-size: 28px;
        margin-top: 10px;
    }

    .icon-feedback {
        width: 30px;
    }

    .box-btn {
        position: relative;
    }

    .group-icon-feedback {
        display: flex;
        justify-content: center;
        margin-top: 20px;
    }

    .stat-description {
        font-size: 15px;
        line-height: 22px;
    }

    .stat-number {
        font-size: 25px;
    }

    .calendar-text {
        font-size: 25px;
        line-height: 35px;
        margin-top: 0;
    }

    .calendar-text-p {
        font-size: 15px;
    }

    .formula-text {
        font-size: 28px;
        line-height: 36px;
    }

    .service-title {
        font-size: 25px;
    }

    .footer-column h3 {
        font-size: 30px;
    }

    .footer-column ul li a {
        font-size: 15px;
    }

    .footer-column p {
        font-size: 15px;
    }

    .text-footer-span {
        font-size: 15px;
    }

    .follow-box h3 {
        font-size: 28px;
    }

    .follow-box p {
        width: 100%;
        font-size: 15px;
    }

    .title-course-detail {
        font-size: 25px;
        line-height: 35px;
    }

    .description-course-detail {
        font-size: 15px;
    }

    .title-course-detail-2 {
        font-size: 20px;
    }

    .calendar-course-detail h2 {
        font-size: 20px;
    }

    .calendar-course-detail p {
        font-size: 15px;
    }

    .description-left ul li {
        font-size: 15px;
    }

    .content-course-off {
        margin-top: 35px;
        padding-bottom: 60px;
    }

    .form-left-register h2 {
        font-size: 24px;
        margin-bottom: 0;
    }

    .form-left-register p {
        font-size: 18px;
        /*margin-bottom: 35px;*/
    }

    .div-item h3 {
        font-size: 17px !important;
    }

    .div-item h4 {
        font-size: 24px !important;
    }

    .detail-product {
        padding: 15px;
    }

    .detail-product h3 {
        font-size: 25px;
        line-height: 35px;
    }

    .detail-product-p {
        font-size: 15px;
        margin-top: 0;
    }

    .detail-product h4 {
        font-size: 25px;
    }

    .span-1 {
        font-size: 23px;
    }

    .span-2 {
        font-size: 20px;
    }

    .span-3 {
        font-size: 23px;
    }

    .group-btn-detail-product {
        margin: 30px 0;
        display: flex;
        justify-content: space-between;
    }

    .btn-detail-1 {
        width: 47% !important;
        font-size: 25px !important;
    }

    .btn-detail-2 {
        width: 47% !important;
        font-size: 25px !important;
    }

    .span-5 {
        font-size: 15px;
    }

    .div-info-product-1 ul li {
        margin-bottom: 10px;
        font-size: 16px;
    }

    .div-info-zalo {
        display: none;
    }

    .detail-content-product-btn-1 {
        font-weight: 500;
        font-size: 25px;
        padding: 10px 20px;
    }

    .detail-content-product-btn-2 {
        font-size: 25px;
        margin-left: 0;
        padding: 10px 15px;
    }

    #myTab {
        display: flex;
        justify-content: space-between;
    }

    .div-info-2 {
        margin-top: 20px;
        padding: 20px;
        font-size: 15px;
    }

    .div-products h4 {
        font-size: 27px;
    }

    .bread-1 {
        font-size: 15px;
    }

    .bread-2 {
        font-size: 15px;
    }

    .bread-3 {
        font-size: 15px;
    }

    .span-4 {
        font-size: 25px;
    }

    .card-left {
        padding-right: 10px;
    }

    .detail-product-card a {
        font-size: 17px;
        line-height: 28px;
    }

    .detail-product-card h4 {
        font-size: 15px;
        line-height: 15px;
    }

    .class-quantity .span-4 {
        font-size: 20px;
    }

    #myTabCourseTrial {
        display: none;
    }

    #myTabContent {
        display: none;
    }

    .footer-container {
        gap: 40px !important;
    }

    .footer-bottom {
        margin-right: 0 !important;
    }

}

/* ≤ 992px - Laptop nhỏ */
@media (max-width: 992px) {

}

/* ≤ 1200px - Laptop lớn */
@media (max-width: 1200px) {
    .logo img {
        width: 205px;
        height: 125px;
    }

    .group-btn-detail-product {
        margin: 30px 0;
        display: flex;
        justify-content: space-between;
    }

    .btn-detail-1 {
        width: 47%;
        font-size: 30px;
    }

    .btn-detail-2 {
        width: 47%;
        font-size: 30px;
    }

    .div-info-zalo-text1 {
        padding: 8px 20px;
    }

    .div-item-zalo {
        padding: 20px;
    }

    .footer-container {
        gap: 125px;
    }

    .register-button {
        padding: 8px 5px;
    }

    .div-item h4 {
        font-size: 23px !important;
    }

    .div-item h3 {
        font-size: 18px;
    }

}

/* > 1200px - Màn hình rộng */
@media (max-width: 1200px) {

}