.article-header { background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%); color: #fff; padding: 40px; border-radius: 12px; margin-bottom: 30px; } .article-header h1 { font-size: 2.5em; margin-bottom: 10px; color: #fff; } .article-meta { color: #a0a0a0; font-size: 1.1em; } .abstract-box { background: #f8f9fa; border-left: 5px solid #4361ee; padding: 25px; margin: 30px 0; border-radius: 0 12px 12px 0; } .abstract-box h3…