Move the big title section

Hi,

I have some issues customizing my website. I’m able to move each section and place them in the order I want, except for the big title section. I tried to use the following code in my child theme style.css file:

#content {
   display: -webkit-box;      /* OLD - iOS 6-, Safari 3.1-6 */
   display: -moz-box;         /* OLD - Firefox 19- (buggy but mostly works) */
   display: -ms-flexbox;      /* TWEENER - IE 10 */
   display: -webkit-flex;     /* NEW - Chrome */
   display: flex;             /* NEW, Spec - Opera 12.1, Firefox 20+ */
   -webkit-box-orient: vertical;
   -ms-flex-direction: column;
   webkit-flex-direction: column;
   flex-direction: column;
}

.separator-one {
   -webkit-box-ordinal-group: 1;   /* OLD - iOS 6-, Safari 3.1-6 */
   -moz-box-ordinal-group: 1;      /* OLD - Firefox 19- */
   -ms-flex-order: 1;              /* TWEENER - IE 10 */
   -webkit-order: 1;               /* NEW - Chrome */
   order: 1;                       /* NEW, Spec - Opera 12.1, Firefox 20+ */
}
.intro {
   -webkit-box-ordinal-group: 2;   /* OLD - iOS 6-, Safari 3.1-6 */
   -moz-box-ordinal-group: 2;      /* OLD - Firefox 19- */
   -ms-flex-order: 2;              /* TWEENER - IE 10 */
   -webkit-order: 2;               /* NEW - Chrome */
   order: 2;                       /* NEW, Spec - Opera 12.1, Firefox 20+ */
}

Is the .intro the problem, does this section is referred to via an other name?

Thank you in advance for your help.