@media screen and (max-width: 1400px) {
    h1 {
        font-size: 70px;
    }
    h2 {
        font-size: 50px;
    }
    h3 {
        font-size: 30px;
        margin-bottom: 2em;
    }
    h5 {
        font-size: 28px;
    }
    .page-container,
    .page-header,
    .page-footer {
        padding-left: 70px;
        padding-right: 70px;
    }
    .content-section {
        padding-bottom: 140px;
    }
    .content-section__2 {
        padding-bottom: 0;
    }
    .content-section__3 {
        padding-bottom: 50px;
    }
    .page-title {
        font-size: 32px;
    }
}

@media screen and (max-width: 1200px) {
    body {
        font-size: 20px;
    }
    h1 {
        font-size: 50px;
    }
    h2 {
        font-size: 40px;
        margin-bottom: 1em;
    }
    h3 {
        font-size: 24px;
        margin-bottom: 1em;
    }
    h5 {
        font-size: 24px;
    }
    .page-container,
    .page-header,
    .page-footer {
        padding-left: 30px;
        padding-right: 30px;
    }
    .content-section {
        padding-bottom: 80px;
    }
    .content-section__2 {
        padding-bottom: 0;
    }
    .content-section__3 {
        padding-bottom: 50px;
    }
    .nav-main {
        font-size: 20px;
    }
    .page-title {
        font-size: 1.3em;
    }
    .formula-wrapper {
        padding: 0;
    }
    .list-formula {
        font-size: 28px;
    }
    .list-items li::before {
        height: 40px;
    }
    .list-items li {
        padding-left: 40px;
    }
    .pic-text__info {
        font-size: .8em;
    }
}

@media screen and (max-width: 1024px) {
    .content-section,
    .content-section__3 {
        padding-bottom: 30px;
    }
    .content-section__2 {
        padding-bottom: 0;
    }
}
@media screen and (min-width: 860px) {
  .nav-primary  { display:block !important; }
}


@media screen and (max-width: 860px) {
    .content-section__7 {
        overflow: hidden;
    }
    .content-section__8 {
        padding-top: 30px;
    }
    .page-header {
        height: 65px;
    }
    .header-logo {
        display: block;
        font-size: 32px;
    }
    .hamburger {
        display: block
    }
    .nav-primary {
        background: #fff;
        bottom: 0;
        display: none;
        left: 0;
        max-height: 100%;
        overflow-x: hidden;
        overflow-y: auto;
        position: fixed;
        right: 0;
        text-align: center;
        top: 65px;
    }
    .nav-main {
        position: relative;
        top: 50%;
        transform: translateY(-50%);
    }
    .nav-main {
        display: block;
        font-size: 28px;
    }
    .nav-main>li {
        margin: 0 0 15px;
    }
    .page-title {
        background-size: 100%;
    }
    .pic-text__info {
        background: rgba(0, 0, 0, .5);
        line-height: normal;
        padding: 10px;
        right: 20px;
    }
}

@media screen and (max-width: 767px) {
    body {
        font-size: 18px;
    }
    h1 {
        font-size: 40px;
    }
    h2 {
        font-size: 30px;
        margin-bottom: 1em;
    }
    h3 {
        font-size: 20px;
        margin-bottom: 1em;
    }
    h5 {
        font-size: 20px;
    }
    .page-title {
        padding-top: 75px;
    }
    .page-title .page-container {
        padding-right: 30px;
    }
    .page-title__info {
        flex-direction: column-reverse
    }
    .pic-title {
        margin-bottom: 20px;
    }
    .list-formula {
        font-size: 1em;
    }
    .page-footer {
        padding-bottom: 30px;
        padding-top: 30px;
    }
    .footer-logo {
        font-size: 32px;
    }
}

@media screen and (max-width: 700px) {
    .pic-text__info {
        position: relative;
        right: auto;
        top: auto;
        transform: none;
        width: 100%;
    }
}

@media screen and (max-height: 1200px) {
    .main-section {
        background-position: 0 -450px;
    }
/*    .page-title {
        background-size: 50%;
    }*/
}