Css modifications

Hi.
I would like to know if there is a possibility of inserting the css not inline. On my site the css modifications only work from the wordpress panel, they don’t work on your dashboard or even in the css file of the child theme.
My css is this
#top .logo-title {
transition: opacity 0.4s ease-out;
-moz-transition: opacity 0.4s ease-out;
-webkit-transition: opacity 0.4s ease-out;
-o-transition: opacity 0.4s ease-out;
font-size: 15px;
position: absolute;
left: 80px;
top: -7px;
opacity: 1;
white-space: nowrap;
}
#top .logo-subtitle {
top: 7px;
}
#top .subtext {
float: left;
position: relative;
}
#top .header-scrolled .logo-title {
left: 42px;
}
.excerpt {
color: #ffffff;
left: 29%;
position: absolute;
top: 12%;
font-size: 12px;
font-weight: bold;
}
@media only screen and (max-width: 1140px) {
.excerpt {
display:none;
}
}
.entry-content img {
border-radius:2px;
height:auto !important;
max-width:100%;
display:block;
box-shadow: 0px 0px 10px 10px rgba(0, 0, 0, .4);
border: 1px solid #8a4419;
border-style: inset;
}
.entry-content strong {
font-weight: bold;
}
.main_color .template-archives .tabcontainer a, #top .main_color .tabcontainer .tab:hover, #top .main_color .tabcontainer .tab.active_tab{
color:#4ecac2!important
}
.content a {
font-weight: bold;
}
.entry-content a[target=”_blank”]:after {
font-family: ‘fontello’;
content: ” \f08e”;
}
.entry-content a {
font-weight: bold;
text-decoration: none;
}
.entry-content a:hover{background-size: 100% 2px;
background:-webkit-gradient(linear,left top,right top,from(#ff8a00),to(#e52e71));
background:linear-gradient(to right,#ff8a00,#e52e71);
-webkit-background-clip:text;
-webkit-text-fill-color:transparent;
-webkit-box-decoration-break:clone;}
Thanks
Best Regards