.top-at-particles {
    z-index: 1;
    position: relative;
}

.main-bg {
    background-color: #0F0F0F;
}

.return-to-top {
    position: fixed;
    right: 30px;
    bottom: 30px;
    display: none;
    width: 40px;
    line-height: 40px;
    height: 40px;
    text-align: center;
    font-size: 20px;
    cursor: pointer;
    color: #fff;
    background: #37afb6;
    border: 1px solid #37afb6;
    border-radius: 50%;
    -webkit-transition: .5s;
    -moz-transition: .5s;
    -ms-transition: .5s;
    -o-transition: .5s;
    transition: .5s;
    z-index: 2;
}
.return-to-top:hover {
    background:#fff;
    color: #37afb6;
	border:1px solid #37afb6;
}


.return-to-top svg{
    position: relative;
    animation-name: fa;
    animation-direction: alternate;
    animation-iteration-count: infinite;
    animation-duration:1s;
}

@keyframes fa {
    0%   {top:5px;}
    100%  {top:0px;}
}

/* ---- .item ---- */
.isotope:after {
    content: '';
    display: block;
    clear: both;
}
.isotope .item {
    position:relative;
    overflow:hidden;
    margin-bottom: 30px;
}
/*.item img*/
.isotope .item img{
    width:100%;
    -webkit-transition: .5s;
    -moz-transition: .5s;
    -ms-transition: .5s;
    -o-transition: .5s;
    transition: .5s;
}
.isotope .item:hover  img{
    -webkit-transform:scale(1.5);
    -moz-transform:scale(1.5);
    -ms-transform:scale(1.5);
    -o-transform:scale(1.5);
    transform:scale(1.5);
}/*.item img*/

/*.isotope-overlay*/
.isotope-overlay{
    position:absolute;
    height:100%;
    width:100%;
    background:rgba(31,44,108,.5);
    display:flex;
    align-items:center;
    text-transform: uppercase;
    justify-content:center;
    flex-direction:row;
    -webkit-transform:scale(0);
    -moz-transform:scale(0);
    -ms-transform:scale(0);
    -o-transform:scale(0);
    transform:scale(0);
    -webkit-transition: .5s;
    -moz-transition: .5s;
    -ms-transition: .5s;
    -o-transition: .5s;
    transition: .5s;
}
.isotope-overlay a {
    display: inline-block;
    color: #fff;
    font-size: 14px;
    text-align: center;
}
.isotope .item:hover .isotope-overlay{
    -webkit-transform:scale(1);
    -moz-transform:scale(1);
    -ms-transform:scale(1);
    -o-transform:scale(1);
    transform:scale(1);
    top:0;
}/*.isotope-overlay*/

.fixed-top {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1030; /* 確保導覽列在其他內容上方 */
}

body {
    padding-top: 56px; /* 根據你的導覽列高度調整 */
}
#services, #inquiry, #contact, #software-design, #socialmedia-seo, #maintain, #software, #marketing, #our-cases {
    scroll-margin-top: 56px; /* 這裡的值要和你的導覽列高度一致 */
}