.phucard1 { position: relative; display: inline-block; padding: 20px 28px; font-size: 29px; border-radius:10px; color: #fff; background: linear-gradient(135deg, #003366, #000000); overflow: hidden; cursor: pointer; transition: background 0.3s, color 0.3s; width: 100%; } .phucard1::before { content: ''; position: absolute; top: 0; left: -100%; width: 100%; height: 100%; background: linear-gradient( 120deg, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 0.3) 50%, rgba(255, 255, 255, 0) 100% ); animation: slide-shine 2.5s infinite; } @keyframes slide-shine { 0% { left: -100%; } 50% { left: 100%; } 100% { left: 100%; } } แผนการเรียน ระดับ ปวช. 5