a:link {text-decoration: none;color: #747474}
a:visited {text-decoration: none; color: #747474}
a:hover {text-decoration: none; background-color: #efefef;}
a:active {text-decoration: none; background-color: #efefef}

#inhalt {width: 900px; margin-left: auto; margin-right: auto; font-family: "Trebuchet MS", Helvetica, sans-serif; letter-spacing: 4px}

#logo {text-align: center; font-size: 200%; color: #4b4b4b; font-family: "American Captain"; padding-bottom: 13px; padding-top: 30px;}

#navigation {text-align: center; font-size: 80%; padding-bottom: 13px;}

#text {font-size: 90%; letter-spacing: 1px; padding-bottom: 13px; margin: 20px; color: #d1d1d1}

#footer {text-align: center; font-size: 80%}

body {
    heigt: 2000px;
    margin: @;
    background-image: url(Hintergrund.png)
}


#header {text-align: center; font-size: 200%; color: #4b4b4b; font-family: "American Captain"; padding-bottom: 13px; padding-top: 30px;}

#navigation_packs {text-align: center; font-size: 80%; padding-bottom: 100px;}

#alphaindustrie {margin-right: auto}

#bani_alphaindu {margin-bottom: 100px}

#youtube_ak3y {text-align: center; font-size: 200%; color: #4b4b4b; font-family: "American Captain"; padding-bottom: 13px; padding-top: 30px;}

.bildak3ylinks {
    width: 600px;


    height: 338px;
    margin-left: -200
}

.bildak3ylinks_groß {
    width: 0px;
    margin-left: 10px;
    position: absolute;
    -webkit-transition width: 0.3s Linear 0s;
    -moz-transition width: 0.3s Linear 0s;
    -o-transition width: 0.3s Linear 0s;
    transition: width: 0.3s Linear 0s;
    z-index: 10;
}

.bildak3ylinks:hover + .bildak3ylinks_groß {
    width: 700px;
}