.free-shipping-box{
    background: linear-gradient(135deg,#e8fff1,#d4f7df);
    border:1px solid #22c55e;
    color:#166534;
    padding:14px;
    margin-bottom:18px;
    border-radius:10px;
    font-size:15px;
    font-weight:700;
    text-align:center;
    box-shadow:0 2px 6px rgba(0,0,0,.08);
}
.free-shipping-box strong{
    color:#15803d;
}