.paper-container{background:#fff;border:1px solid #ddd;border-radius:5px;box-shadow:0 0 10px rgba(0,0,0,.1);font-family:Arial,sans-serif;margin:0 auto;max-width:800px;padding:20px}.paper-container h1{color:#333;font-size:2em;margin-bottom:20px;text-align:center}.paper-content{color:#333;font-size:1em;line-height:1.6}.paper-content h2,.paper-content h3,.paper-content h4{color:#444;margin-top:20px}.paper-content p{margin-bottom:15px}.paper-content a{color:#0073e6;text-decoration:none}.paper-content a:hover{text-decoration:underline}@media (min-width:1200px){.paper-container{max-width:1000px;padding:40px}}