.tip-box {
    border-left: 5px solid #3498db;
    background-color: #f0f8ff;
    padding: 12px;
    margin: 10px 0;
    border-radius: 4px;
}
.tip-box::before {
    content: "提示";
    font-weight: bold;
    color: #3498db;
    margin-right: 8px;
}