.part {
    position: relative;
    font-size: .75rem;
}
.part .part-wrap {
    padding: 15px;
}
.part .part-image {
    max-width: 100%;
    width: 100%;
}
.part-text-center {
    text-align: center;
}
.part .part-title {
    font-size: 1.9em;
    font-weight: bold;
    line-height: 1.25;
}
.part .part-text {
    font-size: 1.25em;
    margin-top: .5em;
}
.part .part-text2 {
    font-size: 1em;
    padding-top: 1.5em;
}
.part-color-yellow {
    color: #eb8f0a;
}

.part-first .part-title {
    font-size: 5em;
    color: #eb8f0a;
}
.part-first .part-text {
    font-size: 2.5em;
    font-weight: bold;
}

.part-features {
    background-color: #131313;
    color: #000;
}
.part-features .part-wrap {
    padding: 50px 0;
    width: 98%;
    margin: 0 auto;
    text-align: center;
}
.part-features .part-row {
    margin-top: 2.5em;
    display: flex;
    align-items: center;
    justify-content: space-around;
    flex-wrap: wrap;
}
.part-features .part-i {
    width: 50%;
    padding-bottom: 1em;
}
.part-features .part-w {
    background-color: #fff;
    margin: 0 5px;
    border-radius: 8px;
}
.part-features .part-w img {
    max-width: 100%;
    width: 100%;
}
.part-features .part-t {
    padding: 5px;
}

.part-env {
    color: #fff;
    background-color: #131313;
}
.part-env .part-wrap {
    padding: 30px 15px;
    width: 100%;
    margin: 0 auto;
}

.part-battery {
    background-color: #ebebeb;
}

.part-screen .part-text2 {
    font-size: 1em;
    width: 98%;
    margin: 1em auto 0;
    font-weight: bold;
    display: flex;
    justify-content: space-between;
}

.part-security .part-text2 {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    text-align: center;
    font-size: 1.125em;
}
.part-security .part-text2 .p-h {
    font-weight: bold;
    font-size: 2em;
    line-height: 1;
}

.part-navigation .part-text2 {
    position: absolute;
    left: 20%;
    right: 20%;
    bottom: 2%;
    font-size: 1.25em;
    font-weight: bold;
    display: flex;
    justify-content: space-between;
}

@media (max-width: 380px) {
    .part-features .part-i {
        width: 100%;
    }
}

@media (min-width: 768px) {
    .part {
        font-size: 1rem;
    }
    .part .part-wrap {
        padding: 0;
    }
    .part-first {
        color: #fff;
    }
    .part-first .part-wrap {
        position: absolute;
        top: 14%;
        left: 43%;
        right: 7%;
    }
    .part-first .part-title {
        font-size: 5em;
    }
    .part-first .part-text {
        font-size: 2.5em;
        font-weight: bold;
    }

    .part-usage .part-wrap {
        padding: 60px 0 0;
    }

    .part-protection,
    .part-body,
    .part-body2,
    .part-button,
    .part-underwater,
    .part-screen,
    .part-camera,
    .part-navigation,
    .part-hardware,
    .part-network {
        color: #fff;
    }
    .part-protection .part-wrap,
    .part-body .part-wrap,
    .part-underwater .part-wrap,
    .part-screen .part-wrap,
    .part-network .part-wrap {
        position: absolute;
        top: 4%;
        left: 10%;
        right: 10%;
    }
    .part-protection .part-wrap {
        top: 2%;
    }
    .part-network .part-wrap {
        left: 25%;
        right: 25%;
    }
    .part-env {
        color: #fff;
        background-color: #131313;
    }
    .part-env .part-wrap {
        padding: 60px 0;
        width: 80%;
    }

    .part-body2 .part-wrap,
    .part-button .part-wrap {
        position: absolute;
        top: 5%;
        left: 55%;
        right: 15%;
    }

    .part-battery .part-wrap {
        padding: 60px 0;
        width: 80%;
        margin: 0 auto;
    }

    .part-camera .part-wrap {
        position: absolute;
        top: 25%;
        left: 53%;
        right: 10%;
    }
    .part-security .part-wrap {
        position: absolute;
        top: 25%;
        left: 15%;
        right: 53%;
    }
    .part-navigation .part-wrap {
        position: absolute;
        top: 15%;
        left: 15%;
        right: 45%;
    }
    .part-hardware .part-wrap {
        position: absolute;
        top: 15%;
        left: 55%;
        right: 5%;
    }
    .part-hardware .part-text2 {
        font-size: 1.35em;
        font-weight: bold;
    }
    .part-os .part-wrap {
        position: absolute;
        top: 10%;
        left: 43%;
        right: 15%;
    }

    .part-features .part-wrap {
        padding: 50px 0;
        width: 80%;
    }
    .part-features .part-i {
        width: 33.33333333333333333333333333%;
        padding-bottom: 1em;
    }

    .part-screen .part-text2 {
        font-size: 1.25em;
        width: 60%;
    }

    .part-navigation .part-text2 {
        left: 35%;
        right: 35%;
        bottom: 5%;
        font-size: 1.5em;
    }
}

@media (max-width: 480px) {
    .part .part-title {
        font-size: 1.25rem;
    }
    .part .part-text {
        font-size: .85rem;
    }
    .part-first .part-title {
        font-size: 3em;
    }
    .part-first .part-text {
        font-size: 1.5em;
    }
}