.vou-box-list li:after { content: ""; position: absolute; top: -20px; display: block; 10px; height: 100%; margin-top: 20px; background-size: 20px 10px; right: -3px; background-color: #ffffff; background-position: 100% 15%; background-image: linear-gradient(-45deg, #f0f0f0 25%, transparent 25%, transparent), linear-gradient(-135deg, #f0f0f0 25%, transparent 25%, transparent), linear-gradient(-45deg, transparent 75%, #f0f0f0 75%), linear-gradient(-135deg, transparent 75%, #f0f0f0 75%); }