.pv-contact-box{
    position:fixed;
    display:flex;
    flex-direction:column;
    align-items:center;
    gap:12px;
    z-index:99999;
}
.pv-contact-toggle{
    color:#fff;
    padding:12px 10px;
    border-radius:20px;
    writing-mode:vertical-rl;
    cursor:pointer;
    font-weight:600;
    font-size:14px;
    box-shadow:0 4px 8px rgba(0,0,0,0.2);
    text-decoration:none;
    display:flex;
    justify-content:center;
    align-items:center;
}

.pv-item{
    width:46px;
    height:46px;
    border-radius:50%;
    display:flex;
    justify-content:center;
    align-items:center;
    cursor:pointer;
    transition:.25s;
}
.pv-item img{
    width:28px;
    height:28px;
}

.pv-top{
    opacity:0;
    visibility:hidden;
    transition:.3s;
}
.pv-top.show{
    opacity:1;
    visibility:visible;
    transform:scale(1.05);
}

/* Nút toggle trên mobile */
.pv-mobile-toggle{
    width:46px;
    height:46px;
    border-radius:50%;
    background:#0079d3;
    position:fixed;
    bottom:20px;
    right:20px;
    z-index:99998;
    cursor:pointer;
    display:none;
}
.pv-mobile-toggle::after{
    content:"≡";
    color:#fff;
    font-size:28px;
    font-weight:bold;
    position:absolute;
    top:6px;
    left:13px;
    line-height:1;
}

.pv-contact-box.pv-hidden{
    display:none !important;
}

@media (max-width: 480px){
    .pv-mobile-toggle{display:block;}
    .pv-contact-box{
        transform:scale(.78);
        transform-origin:right bottom;
    }
}