* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Оптимизация загрузки изображений */
img {
    image-rendering: auto;  /* по умолчанию хорошее качество */
}

/* Только для растровых изображений (PNG, JPG) */
img[src$=".png"],
img[src$=".jpg"],
img[src$=".jpeg"],
img[src$=".webp"] {
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
}

body {
    font-family: 'SF Pro', -apple-system, BlinkMacSystemFont, sans-serif;
    background: linear-gradient(
        180deg,
        transparent 0%,
        #226FBC 0%,
        #1D4A75 100%,
        transparent 100%
    );
    margin: 0;
    padding: 0;
}

/* HEADER */
.top-block {
    width: 350px;
    height: 50px;
    position: fixed;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
    /* liquid glass */
    background: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.15);

    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 20px;
    gap: 50px;

    border-radius: 100px;

    margin: 0;  
}

.top-block button {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.top-block button img {
    display: block;
}

.top-block button,
.top-block a.btn-home {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
}

.btn-home img,
.btn-menu img {
    width: 20px;
    height: 20px;
    user-select: none;
    -webkit-user-drag: none;
    -khtml-user-drag: none;
    -moz-user-drag: none;
    -o-user-drag: none;
    transition: opacity 0.2s ease;
}

.nav-news,
.nav-products {
    font-size: 16px;
    color: #3E3E3E;
    margin: 0;
    transition: color 0.2s ease;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    display: inline-block;      
    text-decoration: none;
}

.nav-news:hover,
.nav-products:hover {
    color: white;
}

.btn-menu img {
    width: 31px;
    height: 31px;
}

.btn-home .icon-hover,
.btn-menu .icon-hover {
    display: none;
}

.btn-home .icon-normal,
.btn-menu .icon-normal {
    display: block;
}

.btn-home:hover .icon-normal,
.btn-menu:hover .icon-normal {
    display: none;
}

.btn-home:hover .icon-hover,
.btn-menu:hover .icon-hover {
    display: block;
}

.menu-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.menu-dropdown {
    position: fixed;
    top: 70px;
    left: 50%;
    transform: translateX(-50%) translateZ(0);
    width: 350px;
    height: 194px;
    z-index: 1001;

    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.25s ease, visibility 0.25s ease;

    background: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.15);
    border-radius: 20px;

    isolation: isolate;
}

.menu-dropdown.menu-dropdown-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.menu-dropdown-link {
    display: block;
    padding: 12px 16px;
    font-size: 32px;
    font-weight: 500;
    color: #373737;
    text-decoration: none;
    border-radius: 12px;
    transition: background 0.2s ease, color 0.2s ease;
}

.menu-dropdown-link:hover {
    color: black;
}

.menu-dropdown::before {
    content: '';
    position: absolute;
    bottom: 100%;
    left: 0;
    right: 0;
    height: 15px;
}

/* END HEADER */

/* MAIN BLOCK */

.logotype-block {
    width: 100%;
    max-height: 486.57px;
    margin: 160px auto 0 auto;
    text-align: center;
}

.logotype-image {
    max-width: 100%;
    max-height: 100%;
    height: 486.57px;

}

.banner-header-block {
    max-width: 100%;
    max-height: 100%;
    margin: 50px auto 0 auto;
    text-align: center;
}

.banner-title-image {
    max-width: 100%;
    max-height: 100%;
    height: 119px;
}

.window-app-block {
    max-width: 100%;
    max-height: 100%;
    height: 945.09px;
    margin: 50px auto 0 auto;
    text-align: center;
}

.window-app {
    max-width: 100%;
    max-height: 100%;
    height: 945.09px;
}

.question-answer-block {
    margin: 50px auto 0 auto;
    text-align: center;
    max-width: 100%;
    max-height: 100%;
    height: 219px;
}

.title-question {
    font-size: 50px;
    font-weight: 100;
    color: white;
}

.question-answer-block .answer-block {
    max-width: 100%;
    max-height: 100%;
    height: 134px;
    width: 1208px;
    margin: 25px auto 0 auto;

    display: flex;
    align-items: center;     
    justify-content: center;

    background-image: url("../images/vatistore/block-answer.png");
    background-size: cover;        /* растянуть на весь блок */
    background-position: center;   /* выравнивание */
    background-repeat: no-repeat;
}

.answer-title {
    font-size: 70px;
    font-weight: 400;
    color: #F3D881;
}

.highlight {
    font-size: 70px;
    font-weight: 600;
    color: white;
}

.features-block {
    margin: 50px auto 0 auto;
    text-align: center;
    max-width: 100%;
    max-height: 100%;
    height: 860px;
}

/* FEATURE MULTIDEVICE */

.feature-multidevice {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 40px;
    max-width: 100%;
    max-height: 100%;
    height: 250px;
    width: 1335px;
    margin: 0 auto;
}

.multidevice-icon {
    max-width: 100%;
    max-height: 100%;
    height: 250px;
}

.multidevice-image {
    font-size: 70px;
    font-weight: 300;
    max-width: 1045px;   /* подберите под макет */
    line-height: 1.2;
    margin: 0;
    text-align: left;
}

/* END FEATURE MULTIDEVICE */

/* FEATURE MULTIUSERS */

.feature-multiusers {
    display: flex;
    flex-direction: row-reverse;
    align-items: center;
    gap: 40px;
    max-width: 100%;
    max-height: 100%;
    height: 250px;
    width: 1335px;
    margin: 50px auto 0 auto;
}

.multiusers-icon {
    max-width: 100%;
    max-height: 100%;
    height: 250px;
}

.multiusers-image {
    font-size: 70px;
    font-weight: 300;
    max-width: 1045px;   /* подберите под макет */
    line-height: 1.2;
    margin: 0;
    text-align: left;
}

/* END FEATURE MULTIUSERS */

/* FEATURE ENVIRONMENT */
.feature-environment {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 40px;
    max-width: 100%;
    max-height: 100%;
    height: 250px;
    width: 1335px;
    margin: 50px auto 0 auto;
}

.environment-icon {
    max-width: 100%;
    max-height: 100%;
    height: 250px;
}

.environment-image {
    font-size: 70px;
    font-weight: 300;
    max-width: 1045px;   /* подберите под макет */
    line-height: 1.2;
    margin: 0;
    text-align: left;
}
/* END FEATURE ENVIRONMENT */

/* BOTTOM BANNER */

.bottom-banner {
    max-width: 100%;
    max-height: 100%;
    height: 299px;
    margin: 100px auto 0 auto;

    background: #123E69;

    display: flex;
    flex-direction: column;
    align-items: center;     
    justify-content: center;
}

.banner-title-1 {
    font-size: 70px;
    font-weight: 400;
    color: #F3D881;
}

.banner-title-2 {
    font-size: 90px;
    font-weight: 600;
    color: white;
}

.highlight-banner {
    color: #226FBC;
}

/* END BOTTOM BANNER */

/* END MAIN BLOCK */

/* BASEMENT */
.basement {
    max-width: 100%;
    max-height: 100%;
    margin: 100px auto 10px auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
}

.separator {
    width: 1000px;
    max-width: 100%;
    height: 1px;
    background-color: #FFFFFF;
}

.basement-footer {
    max-width: 100%;
    width: 1000px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 10px;
}

.title-copyright {
    font-size: 16px;
    color: #FFFFFF;
    margin: 0;
}

.title-country {
    font-size: 16px;
    color: #FFFFFF;
    margin: 0;
}

/* END BASEMENT */

@media (max-width: 480px) {
    html {
        overflow-x: hidden;
        max-width: 100vw;
    }

    body {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        max-width: 100%;
        width: 100%;
        overflow-x: hidden;
    }

    /* Header */
    .top-block {
        width: 350px;  
        height: 50px;       
        gap: 50px;           
        padding: 0 10px;
    }

    .nav-news,
    .nav-products {
        font-size: 14px;
    }

    /* MAIN BLOCK */

    .logotype-block {
        max-width: 100%;
        max-height: 100%;
        height: 349.39px;
        width: 400px;
        margin: 160px auto 0 auto;
        text-align: center;
    }
    
    .logotype-image {
        max-width: 100%;
        max-height: 100%;
        height: 349.39px;
        width: 400px;
    }
    
    .banner-header-block {
        max-width: 100%;
        max-height: 100%;
        height: 228px;
        width: 384px;
        margin: 50px auto 0 auto;
        text-align: center;
    }
    
    .banner-title-image {
        max-width: 100%;
        max-height: 100%;
        height: 228px;
        width: 384px;
    }
    
    .window-app-block {
        max-width: 100%;
        max-height: 100%;
        height: 252.03px;
        width: 400px;
        margin: 50px auto 0 auto;
        text-align: center;
    }
    
    .window-app {
        max-width: 100%;
        max-height: 100%;
        height: 252.03px;
        width: 400px;
    }

    .question-answer-block {
        margin: 50px auto 0 auto;
        text-align: center;
        width: 100%;
        height: 100%;
        max-height: 298px;
        max-width: 412px;

        display: flex;
        align-items: center;    
        flex-direction: column; 
        justify-content: center;
    }
    
    .title-question {
        font-size: 40px;
        font-weight: 100;
        color: white;
        max-width: 302px;
    }
    
    .question-answer-block .answer-block {
        width: 100%;
        height: 100%;
        max-height: 129px;
        min-height: 129px;
        max-width: 412px;
        margin: 25px auto 0 auto;
    
        display: flex;
        align-items: center;     
        justify-content: center;
    
        background-image: url("../images/vatistore/block-answer-480.png");
        background-size: cover;        /* растянуть на весь блок */
        background-position: center;   /* выравнивание */
        background-repeat: no-repeat;
    }
    
    .answer-title {
        font-size: 40px;
        font-weight: 400;
        color: #F3D881;
        max-width: 363px;
    }
    
    .highlight {
        font-size: 40px;
        font-weight: 600;
        color: white;
    }

    /* FEATURES BLOCK */

    .features-block {
        margin: 50px auto 0 auto;
        text-align: center;
        width: 100%;
        height: 100%;
        max-height: 340.14px;
        max-width: 416px;
        min-height: 340.14px;

        display: flex;
        align-items: center;     
        justify-content: center;
        flex-direction: column;
    }

    .feature-multidevice,
    .feature-multiusers,
    .feature-environment {
        width: 100%;
        height: 100%;
        max-height: 100.14px;
        max-width: 416px;
        gap: 20px;
    }

    .multidevice-icon,
    .multiusers-icon,
    .environment-icon {
        max-width: 100%;
        max-height: 100%;
        height: 100px;
    }

    .multidevice-image {
        font-size: 70px;
        font-weight: 300;
        width: 296px;   
        height: 87px;
        max-width: 100%;
        max-height: 100%;
        line-height: 1.2;
        margin: 0;
        text-align: left;
    }

    .multiusers-image {
        font-size: 70px;
        font-weight: 300;
        width: 284px;   
        height: 87px;
        max-width: 100%;
        max-height: 100%;
        line-height: 1.2;
        margin: 0;
        text-align: left;
    }

    .environment-image {
        font-size: 70px;
        font-weight: 300;
        width: 291px;   
        height: 81px;
        max-width: 100%;
        max-height: 100%;
        line-height: 1.2;
        margin: 0;
        text-align: left;
    }
    
    /* FEATURE MULTIDEVICE */
    
    .feature-multidevice {
        display: flex;
        flex-direction: row;
        align-items: center;
        margin: 0 auto;
    }
    
    /* FEATURE MULTIUSERS */
    
    .feature-multiusers {
        display: flex;
        flex-direction: row-reverse;
        align-items: center;
        margin: 50px auto 0 auto;
    }
    
    /* FEATURE ENVIRONMENT */
    .feature-environment {
        display: flex;
        flex-direction: row;
        align-items: center;
        margin: 50px auto 0 auto;
    }

    /* END FEATURES BLOCK */
    
    /* BOTTOM BANNER */
    
    .bottom-banner {
        max-width: 100%;
        max-height: 100%;
        height: 200px;
        width: 100%;
        margin: 70px auto 0 auto;
    
        background: #123E69;
    
        display: flex;
        flex-direction: column;
        align-items: center;     
        justify-content: center;
    }
    
    .banner-title-1 {
        font-size: 36px;
        font-weight: 400;
        color: #F3D881;
    }
    
    .banner-title-2 {
        font-size: 48px;
        font-weight: 600;
        color: white;
    }
    
    .highlight-banner {
        color: #226FBC;
    }
    
    /* END BOTTOM BANNER */

    /* END MAIN BLOCK */

    /* BASEMENT */
    .basement {
        width: 100%;
        max-width: 400px;
        display: flex;
        flex-direction: column;
        align-items: center;
        position: relative;
        margin: 50px auto 10px auto;
    }

    .separator {
        width: 400px;
        max-width: 100%;
        height: 1px;
        background-color: #FFFFFF;
    }

    .basement-footer {
        max-width: 100%;
        width: 354px;
        display: flex;
        justify-content: space-between;
        display: flex;
        flex-direction: column;
        align-items: center;
        position: relative;
    }

    .title-copyright {
        font-size: 16px;
        color: #FFFFFF;
        margin: 0;
    }

    .title-country {
        font-size: 16px;
        color: #FFFFFF;
        margin: 0;
    }

    /* END BASEMENT */
}

@media (max-width: 360px) {
    html {
        overflow-x: hidden;
        max-width: 100vw;
    }

    body {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        max-width: 100%;
        width: 100%;
        overflow-x: hidden;
    }

    /* Header */
    .top-block {
        width: 350px;  
        height: 50px;       
        gap: 50px;           
        padding: 0 10px;
    }

    .nav-news,
    .nav-products {
        font-size: 14px;
    }

    /* MAIN BLOCK */

    .logotype-block {
        max-width: 100%;
        max-height: 100%;
        height: 261.54px;
        width: 300px;
        margin: 120px auto 0 auto;
        text-align: center;
    }
    
    .logotype-image {
        max-width: 100%;
        max-height: 100%;
        height: 261.54px;
        width: 300px;
    }
    
    .banner-header-block {
        max-width: 100%;
        max-height: 100%;
        height: 180px;
        width: 300px;
        margin: 50px auto 0 auto;
        text-align: center;
    }
    
    .banner-title-image {
        max-width: 100%;
        max-height: 100%;
        height: 180px;
        width: 300px;
    }
    
    .window-app-block {
        max-width: 100%;
        max-height: 100%;
        height: 189.02px;
        width: 300px;
        margin: 50px auto 0 auto;
        text-align: center;
    }
    
    .window-app {
        max-width: 100%;
        max-height: 100%;
        height: 189.02px;
        width: 300px;
    }

    .question-answer-block {
        margin: 50px auto 0 auto;
        text-align: center;
        width: 100%;
        height: 100%;
        max-height: 216.99px;
        max-width: 300px;

        display: flex;
        align-items: center;    
        flex-direction: column; 
        justify-content: center;
    }
    
    .title-question {
        font-size: 29.13px;
        font-weight: 100;
        color: white;
        max-width: 220px;
        text-align: left;
    }
    
    .question-answer-block .answer-block {
        width: 100%;
        height: 100%;
        max-height: 93.93px;
        min-height: 93.93px;
        max-width: 300px;
        margin: 25px auto 0 auto;
    
        display: flex;
        align-items: center;     
        justify-content: center;
    
        background-image: url("../images/vatistore/block-answer-360.png");
        background-size: cover;        /* растянуть на весь блок */
        background-position: center;   /* выравнивание */
        background-repeat: no-repeat;
    }
    
    .answer-title {
        font-size: 29.13px;
        font-weight: 400;
        color: #F3D881;
        max-width: 264px;
    }
    
    .highlight {
        font-size: 29.13px;
        font-weight: 600;
        color: white;
    }

    /* FEATURES BLOCK */

    .features-block {
        margin: 50px auto 0 auto;
        text-align: center;
        width: 100%;
        height: 100%;
        max-height: 245.29px;
        max-width: 300.54px;
        min-height: 245.29px;

        display: flex;
        align-items: center;     
        justify-content: center;
        flex-direction: column;
    }

    .feature-multidevice,
    .feature-multiusers,
    .feature-environment {
        width: 100%;
        height: 100%;
        max-height: 72.211px;
        max-width: 300.54px;
        gap: 14px;
    }

    .multidevice-icon,
    .multiusers-icon,
    .environment-icon {
        max-width: 100%;
        max-height: 100%;
        height: 72.12px;
    }

    .multidevice-image {
        width: 213px;   
        height: 63px;
        max-width: 100%;
        max-height: 100%;
        margin: 0;
    }

    .multiusers-image {
        width: 205px;   
        height: 63px;
        max-width: 100%;
        max-height: 100%;
        margin: 0;
    }

    .environment-image {
        width: 210px;   
        height: 57px;
        max-width: 100%;
        max-height: 100%;
        margin: 0;
    }
    
    /* FEATURE MULTIDEVICE */
    
    .feature-multidevice {
        display: flex;
        flex-direction: row;
        align-items: center;
        margin: 0 auto;
    }
    
    /* FEATURE MULTIUSERS */
    
    .feature-multiusers {
        display: flex;
        flex-direction: row-reverse;
        align-items: center;
        margin: 14px auto 0 auto;
    }
    
    /* FEATURE ENVIRONMENT */
    .feature-environment {
        display: flex;
        flex-direction: row;
        align-items: center;
        margin: 14px auto 0 auto;
    }

    /* END FEATURES BLOCK */
    
    /* BOTTOM BANNER */
    
    .bottom-banner {
        max-width: 100%;
        max-height: 100%;
        height: 125px;
        width: 100%;
        margin: 50px auto 0 auto;
    
        background: #123E69;
    
        display: flex;
        flex-direction: column;
        align-items: center;     
        justify-content: center;
    }
    
    .banner-title-1 {
        font-size: 22.5px;
        font-weight: 400;
        color: #F3D881;
    }
    
    .banner-title-2 {
        font-size: 36px;
        font-weight: 600;
        color: white;
    }
    
    .highlight-banner {
        color: #226FBC;
    }
    
    /* END BOTTOM BANNER */

    /* END MAIN BLOCK */

    /* BASEMENT */
    .basement {
        width: 100%;
        max-width: 300px;
        display: flex;
        flex-direction: column;
        align-items: center;
        position: relative;
        margin: 50px auto 10px auto;
    }

    .separator {
        width: 300px;
        max-width: 100%;
        height: 1px;
        background-color: #FFFFFF;
    }

    .basement-footer {
        width: 100%;
        max-width: 265px;
        display: flex;
        justify-content: space-between;
        display: flex;
        flex-direction: column;
        align-items: center;
        position: relative;
    }

    .title-copyright {
        font-size: 12px;
        color: #FFFFFF;
        margin: 0;
    }

    .title-country {
        font-size: 12px;
        color: #FFFFFF;
        margin: 0;
    }

    /* END BASEMENT */
}