CSS coding to that will show up correctly on ipad and iphone

Hello I have recently uploaded a new website, and I am currently testing the site and fixing the bugs, Currently the site looks fine in IE and Firefox, but when I view the site on my Iphone and ipad, it looks totally different.

Please help, and many thanks in advance.

/*
----------------------------------------------------------------*/
html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed, 
figure, figcaption, footer, header, hgroup, 
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
    margin: 0;
    padding: 0;
    border: 0;
    font-size: 100%;
    font: inherit;
    vertical-align: baseline;
}
/* HTML5 display-role reset for older browsers */
article, aside, details, figcaption, figure, 
footer, header, hgroup, menu, nav, section {
    display: block;
}
body {
    line-height: 1;
}
ol, ul {
    list-style: none;
}
blockquote, q {
    quotes: none;
}
blockquote:before, blockquote:after,
q:before, q:after {
    content: '';
    content: none;
}

/* END: RESET / DEFAULT */

/*---------------------------------------------------------*/

/*= GENERAL STYLING
--------------------------------------------------------*/
@media screen and (max-width:959px){
#slide1, #slide2, #slide3, #slide4{
width:100%;
}
#header {
width:80%;
 }
}

@media screen and (max-width:640px){
#slide1, #slide2, #slide3, #slide4
width:100%;
}
#header {
width:100%;
 }
}

@media screen and (max-width:320px){
#slide1, #slide2, #slide3, #slide4{
width:320px;
}
#header {
width:320%;
 }
}

body{
    margin: 0;
    padding: 0;
    width: 100%;
}

h1 { 
    font-family:"Source Sans Pro";
    font-weight:normal;
    font-size: 55px;
    text-align: center;
    color: #fff;
    margin: 0;
    padding: 0;
}

h2 {
   font-family:"Source Sans Pro";
   font-weight: normal;
   font-size: 40px;
   text-align: center;
   color: #fff;
   margin: 0;
    padding: 0;
}

h3 {
   font-family: "Source Sans Pro";
   font-weight: normal;
   font-size: 16px;
   text-align: center;
   margin: 5px 0;
    padding: 0;
    z-index: 1;
    position: relative;
}



.center { margin: 0 auto; }
.content{ margin: 0 auto; width: 960px; }

.content_table
{ margin: 10px 0 0 280px; 
width: 960px; 
}
.clear { clear: both; }
a.lpanel { float: left; color: #e1e1e1; font-size: 12px; font-family:"Source Sans Pro"; text-decoration: none; margin: 7px 11px; }
a.rpanel { float: right; color: #e1e1e1;  font-size: 12px; font-family:"Source Sans Pro"; text-decoration: none; margin: 7px 11px; }

a.lpanel:hover{ color: #fff; }
a.rpanel:hover{ color: #fff; }
/*= HEADER & NAVIGATION
--------------------------------------------------------*/

#header { 
    width: 100%; 
    background: url('../img/header-bg.png'); 
    height: 80px;   
    position: fixed;
    margin-top: 30px;
}

#nav { width: 410px; float: right; margin-top: 20px; }

#logo a { 
float: left; 
position:absolute;
margin-top: 5px 400px 0 0;  
}



#nav ul{
    list-style: none;
    display: block;
    margin: 0 auto;
    list-style: none;   
}

#nav li{
    margin-top: 9px;    
    float: left;
    padding-left: 21px;
}

#nav li a { color: #fff; opacity:0.6; font-size: 16px; text-decoration: none; font-family: "Source Sans Pro"; }
#nav li a.active { color: #fff; opacity:1; border-bottom: 2px solid #fff; }
#nav li a:hover { color: #fff; opacity:1;  }



/*= QUOTES AND SOME ELEMENTS
--------------------------------------------------------*/
.quotes {   
 font-family: "Source Sans Pro";
   font-weight: normal;
   font-size: 50px;
  text-align: left;
  margin: 50px auto;
}

 .author_name_bass { font-family:"Source Sans Pro";  margin: 5px 0 0 500px; 
 color: #fff; 
 font-size: 15px; 
 } 

#position_a
{

position:relative;
margin-bottom:-400px;
} 

 .quotes_container 
 { width: 800px; 
 height:500px;
 margin: 0 auto; 

 }

 #cta1 {   
  font-family: 'Source Sans Pro';
   font-weight: normal;
   font-size: 20px;
   float:left;
}



/*= BUTTONS
--------------------------------------------------------*/

button.btn-know { 
    padding: 15px 47px; 
    margin: 40px 38.8%;
    text-align: center;
    border: 4px solid #fff; 
    color: #fff; 
    background: transparent; 
    font-size: 19px;
    cursor: pointer;
    text-shadow: -1px 2px 0px rgba(90, 90, 90, 0.56);
    -webkit-border-radius: 4px;
    border-radius: 4px;
}

.btn-know:hover { background: #fff; color: transparent; }
ul.built { list-style: none; margin: 0 auto; width: 730px; }
.built li img{ float: left; padding-right: 34px; }



/*= SLIDES STYLING
--------------------------------------------------------*/

#slide1, #slide2, #slide3, #slide4{ width: 100%; }
#slide1{
    background:url('../img/slide1.png') 50% 0 no-repeat fixed;
    color: #fff;
    height: 300px;
    margin: 0;
    padding: 100px 0 260px 0;
    background-size: cover;
}

#slide2{
    background-color: #fff;
    color: #333333;
    height: 720px;
    margin: 0;
    overflow: hidden;
    padding: 100px 0;
}

#slide3{
    background: url('../img/slide3.png') 50% 0 no-repeat fixed;
    color: #fff;
    height: 700px;
    padding: 60px 0 0 0;    
    background-size: cover;
}




#slide4{
    background-color: #fff;
    color: #333333;
    height: 200px;
    padding: 60px 0;
}

#about{
 font-family: 'Source Sans Pro';
   font-weight: normal;
   font-size: 16px;
  text-align: left;
  margin: 50px 0 0 250px;
 }


#table_position{ 
margin: 50px 0 0 525px; 
width: 500px; 
background-color:#ffffff;
}

/*= Contact Form STYLING
--------------------------------------------------------*/
#con_pos{
background-color:e1e1e1;
margin-right:300px;
}


h1
{
font-family: 'Source Sans Pro';
font-size: 30px;
text-transform: uppercase;
color: #ee2b7b;
}


/* Centres the page (this could be container)*/
.body {
    display:block;
    margin:0 auto;
    width:576px;
    font-family: 'Source Sans Pro';
    font-size: 16px;
    color: #999;
}

#title4{
width:300px;
height:35px;
margin: 0 60px 0 0;
}


/* Labels are titles for the text fields. You can use a placeholder instead if you like*/
label
{
    display:block;
    margin-top:20px;
    letter-spacing:2px;
    font-family: 'Source Sans Pro';
}

/* Centres the form within the page */
form 
{
    margin:0 auto;
    width:459px;
}

/* Styles the text boxes */
input, textarea, file {
    width:400px;

    background-color:#efefef;
    border-radius:5px;
    -moz-border-radius:5px;
    -webkit-border-radius:5px;
    border:1px solid #dedede;
    padding:10px;
    margin-top:3px;
    font-size:0.9em;
    color:#3a3a3a;
}

.button{
width:65px;
cursor:pointer;
color:#999999;
font-family: 'Source Sans Pro';
}

    input:focus, textarea:focus {
        border:1px solid #97d6eb;
    }

/* Styles the text area boxes (message field) */    
textarea 
{
    height:200px;
    background-color: #efefef;
}


/* Styles the submit button */
#submit {
    /* background:url(images/submit.png); */
    width:127px;
    height:48px;
    text-align: center;
    /* text-indent:-9999px; */
    border:none;
    margin-top:20px;
    cursor:pointer;

}

/* Styles the submit hover */   
.button:hover {
    color:#fff;
    background-color: #ee2b7b;
    opacity:0.8;
}



/*--------------------------------------------------------*/  


















/*= FOOTER 
--------------------------------------------------------*/

#copyright  { 
color: #ee2b7b; 
font-family:"Source Sans Pro";  
font-size: 12px; 
margin: 100px 0 100px; 
text-align: center;  }
#copyright  a { text-decoration: underline; color: #cccccc;  }