Problemi con ios safari su iphone

[MARIO@MONE]

Salve ho un session main con vari div che è impostata così
<section class="main">

<ul class="ch-grid">
<li>
<div class="ch-item">
<div class="ch-info">
<div class="ch-info-front ch-img-1"></div>
<div class="ch-info-back">
<h3>M</h3>
<p>b<a href="">Vi</a></p>
</div>
</div>
</div>
</li>
<li>
<div class="ch-item">
<div class="ch-info">
<div class="ch-info-front ch-img-2"></div>
<div class="ch-info-back">
<h3>Y</h3>
<p>b <a href=""></a></p>
</div>
</div>
</div>
</li>
<li>
<div class="ch-item">
<div class="ch-info">
<div class="ch-info-front ch-img-3"></div>
<div class="ch-info-back">
<h3>L</h3>
<p>b<a href="">Vi</a></p>
</div>
</div>
</div>
</li>
</ul>

</section>

a questi div è applicato questo css:

.ch-item {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    position: relative;
    cursor: default;
    -webkit-perspective: 900px;
    -moz-perspective: 900px;
    -o-perspective: 900px;
    -ms-perspective: 900px;
    perspective: 900px;
}
.ch-info{
    position: absolute;
    width: 100%;
    height: 100%;
    -webkit-transform-style: preserve-3d;
    -moz-transform-style: preserve-3d;
    -o-transform-style: preserve-3d;
    -ms-transform-style: preserve-3d;
    transform-style: preserve-3d;
}
.ch-info > div {
    display: block;
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background-position: center center;
    -webkit-transition: all 0.4s linear;
    -moz-transition: all 0.4s linear;
    -o-transition: all 0.4s linear;
    -ms-transition: all 0.4s linear;
    transition: all 0.4s linear;
    -webkit-transform-origin: 50% 0%;
    -moz-transform-origin: 50% 0%;
    -o-transform-origin: 50% 0%;
    -ms-transform-origin: 50% 0%;
    transform-origin: 50% 0%;
}


.ch-info .ch-info-front {
    box-shadow: inset 0 0 0 16px rgba(0,0,0,0.3);
}


.ch-info .ch-info-back {
    -webkit-transform: rotate3d(0,0,-220px) rotate3d(1,0,0,90deg);
    -moz-transform: translate3d(0,0,-220px) rotate3d(1,0,0,90deg);
    -o-transform: translate3d(0,0,-220px) rotate3d(1,0,0,90deg);
    -ms-transform: translate3d(0,0,-220px) rotate3d(1,0,0,90deg);
    transform: translate3d(0,0,-220px) rotate3d(1,0,0,90deg);
    background: #000;
    opacity: 0;
}


.ch-img-1 { 
    background-image: url("foto/67262624_407243016596014_5602820962601926656_n.jpg");
}


.ch-img-2 { 
    background-image: url("foto/67319407_707901089632668_1364631360433553408_n.jpg");
}


.ch-img-3 { 
    background-image: url("foto/seo.jpg");
}


.ch-info h3 {
    color: #fff;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 24px;
    margin: 0 15px;
    padding: 60px 0 0 0;
    height: 110px;
    font-family: 'Open Sans', Arial, sans-serif;
    text-shadow: 
        0 0 1px #fff, 
        0 1px 2px rgba(0,0,0,0.3);
}


.ch-info p {
    color: #fff;
    padding: 10px 5px;
    font-style: italic;
    margin: 0 30px;
    font-size: 12px;
    border-top: 1px solid rgba(255,255,255,0.5);
}


.ch-info p a {
    display: block;
    color: #fff;
    color: rgba(255,255,255,0.7);
    font-style: normal;
    font-weight: 700;
    text-transform: uppercase;
    font-size: 9px;
    letter-spacing: 1px;
    padding-top: 4px;
    font-family: 'Open Sans', Arial, sans-serif;
}


.ch-info p a:hover {
    color: #fff222;
    color: rgba(255,242,34, 0.8);
}


.ch-item:hover .ch-info-front {
    -webkit-transform:rotate3d(0,280px,0) rotate3d(1,0,0,-89,9deg);
    -moz-transform:translate3d(0,280px,0) rotate3d(1,0,0,-90deg);
    -o-transform:translate3d(0,280px,0) rotate3d(1,0,0,-90deg);
    -ms-transform:translate3d(0,280px,0) rotate3d(1,0,0,-90deg);
    transform:translate3d(0,280px,0) rotate3d(1,0,0,-90deg);
    opacity: 0;
}


.ch-item:hover .ch-info-back {
    -webkit-transform:rotate3d(1,0,0,0deg);
    -moz-transform:rotate3d(1,0,0,0deg);
    -o-transform:rotate3d(1,0,0,0deg);
    -ms-transform:rotate3d(1,0,0,0deg);
    transform:rotate3d(1,0,0,0deg);
    opacity: 1;
}

questo codice da un effetto trasform dei div rotondi
verificabili qui

http://www.become.altervista.org

è visibile appena dopo jumbotron il sito è in bootstrap.

questo effetto funziona su tutti i browser tranne su i dispositivi apple mobile, nonostante :

-webkit-transform: rotate3d(0,0,-220px) rotate3d(1,0,0,90deg);

il sito è in costruzione..

Grazie in anticipo


gli esempi gli ho presi da qui:

https://tympanus.net/Tutorials/Circl...ts/index7.html

[MARIO@MONE]

nessuno può aiutarmi ?