* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
/* Пример использования */
body {
    
}
h1 {
    text-align: center;
    margin-bottom: 20px;
    font-size: 2.5em;
    color: #333;
}
h2 {
    font-size: 1.875vw;
    font-weight: 500;
    line-height: 2.813vw;
    text-align: center;
    color: #515459;
}
.home {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
}
.banner {
    height: 54.083vw;
    background-color: #fff;
    position: relative;
}
.real-time {
    font-size: 2.5vw;
    font-weight: 500;
    line-height: 2.917vw;
    text-align: left;
    width: 31.25vw;
    position: absolute;
    top: 16.5vw;
    left: 16vw;
    color: #515459;
    z-index: 13;
}
.real-time span,
.real-time a {
    font-size: 0.833vw;
    font-weight: 700;
    line-height: 1.094vw;
    color: #F5C24B;
    display: block;
    text-align: right;
    text-decoration: none;
}
.banner-welcome {
    width: 45.55vw;  /* 874.56px */
    height: 14.79vw; /* 284px */
    top: 34.27vw;    /* 658px */
    left: 26.82vw;   /* 515px */
    border-radius: 16px;
    border: 2px solid #F5C24B;
    background-color: #FFFBF2;
    position: absolute;
    z-index: 13;
}
.banner-welcome div {
    font-size: 2.083vw;
    font-weight: 500;
    line-height: 3.125vw;
    text-align: center;
    color: #515459;
    margin-top: 4.531vw;
}
.banner-welcome span {
    font-size: 0.938vw;
    font-weight: 400;
    line-height: 1.25vw;
    text-align: center;
    color: #515459;   
    display: block;  
}
/*** why-cyboard section start ***/
.why-cyboard {
    width: 66.979vw;
    margin: 0 auto;
    padding-bottom: 6.25vw;
}

.features {
    margin-top: 2.917vw;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}

.feature-box {
    width: 21.146vw;
}
.feature-box .icon-box {
    margin-bottom: 1.771vw;
}
.feature-box h3 {
    font-size: 1.25vw;
    font-weight: 500;
    line-height: 1.667vw;
    text-align: left;
    color: #515459;
}
.feature-box p {
    margin-top: 1.042vw;
    font-size: 0.833vw;
    font-weight: 500;
    line-height: 1.094vw;
    text-align: left;
    color: #8F8F8F;
}
/*** why-cyboard section end ***/

/*** key-features section start ***/
.key-features {
    background-color: #F6F6F6;
    padding: 6.25vw 0;
}
.feature-grid{
    width: 90vw;
    margin: 0 auto;
    text-wrap: nowrap;   
}
.feature-item {
    width: 9.375vw;
    margin: 0 2.448vw;
    display: inline-block;
}
.feature-item .icon-box {
    margin-bottom: 1.771vw;
}
.feature-item h3 {
    font-size: 1.25vw;
    font-weight: 500;
    line-height: 1.667vw;
    text-align: left;
    color: #515459;
    text-wrap: wrap;
}
.feature-item p {
    text-wrap: wrap;
}
/*** key-features section end ***/