style.css

    * {
        margin: 0px;
        padding: 0px;
        box-sizing: border-box;
    }
    
    nav {
        width: 100%;
        height: 75px;
        line-height: 75px;
        padding: 0px 100px;
        position: fixed;
        background-image: linear-gradient(#033747, #012733);
    }
    
    nav .logo p {
        font-size: 30px;
        font-weight: bold;
        float: left;
        color: white;
        text-transform: uppercase;
        letter-spacing: 0.1px;
        cursor: pointer;
    }
    
    nav ul {
        float: right;
    }
    
    nav li {
        display: inline-block;
        list-style: none;
    }
    
    nav li a {
        font-size: 18px;
        text-transform: uppercase;
        padding: 0px 30px;
        color: white;
        text-decoration: none;
    }
    
    nav li a:hover {
        color: #ff8c69;
        transition: all 0.4s ease 0s;
    }
    
    #back {
        width: 100%;
        background: linear-gradient(to top, rgba(0, 0, 0, 0.5)50%, rgba(0, 0, 0, 0.5)50%), url("back.jpg");
        background-position: center;
        background-size: cover;
        height: 100vh;
    }
    
    .srch {
        font-family: 'Times New Roman';
        width: 200px;
        height: 40px;
        background: whitesmoke;
        border: 3px solid #00ff1e;
        margin-top: 13px;
        color: #fff;
        border-right: blue;
        font-size: 16px;
        float: center;
        padding: 10px;
        border-bottom-left-radius: 10px;
        border-top-left-radius: 10px;
    }
    
    .content {
        width: 1200px;
        height: auto;
        margin: auto;
        color: #fff;
        position: relative;
    }
    
    .content .par {
        padding-left: 20px;
        padding-bottom: 25px;
        font-family: Arial;
        letter-spacing: 1.2px;
        line-height: 30px;
    }
    
    .content h1 {
        font-family: 'Times New Roman';
        font-size: 50px;
        padding-left: 20px;
        margin-top: 9%;
        letter-spacing: 2px;
    }
    
    .content .cn {
        width: 160px;
        height: 40px;
        background: #ff7200;
        border: none;
        margin-bottom: 10px;
        margin-left: 20px;
        font-size: 18px;
        border-radius: 10px;
        cursor: pointer;
        transition: .4s ease;
    }
    
    .content .cn a {
        text-decoration: none;
        color: #000;
        transition: .3s ease;
    }
    
    .cn:hover {
        background-color: #fff;
    }
    
    .content span {
        color: #ff7200;
        font-size: 65px
    }
    
    #nav. #footer {
        background-color: #012733;
        padding: 0.5em 0;
    }
    
    #features .article {
        height: 15em;
        margin-bottom: 5em;
        background-color: #1b1ba4;
    }