.four-defense-section {
    width:100%;
    background:#ffffff;
    padding:70px 30px;
}
.four-defense-section .container{
    max-width:1500px;
    margin:0 auto;
    text-align:center;
}
.four-defense-section .main-title{
    font-size:44px;
    color:#222;
    margin-bottom:50px;
    opacity:0;
    animation:def-titleAnim 1.4s ease forwards;
}
.four-defense-section .img-box img{
    width:100%;
    max-width:100%;
    display:block;
}
.four-defense-section .img-box{
    opacity:0;
    transform:translateY(50px);
    animation:def-itemUp 1s ease forwards;
    animation-delay:0.2s;
}

@keyframes def-titleAnim{
    0%{opacity:0;letter-spacing:-3px;transform:translateY(10px);}
    100%{opacity:1;letter-spacing:0;transform:translateY(0);}
}
@keyframes def-itemUp{
    to{opacity:1;transform:translateY(0);}
}