/* 右侧列：侧边栏 */
.sidebar {
    width: 25%; /* 右侧占25%宽度 */
    background: #FFFFFF;
    box-shadow: 0px 6px 27px 0px rgba(225, 225, 225, 0.28);
    border: 1px solid #F2F2F2;
    padding: 10px;
    box-sizing: border-box;
}

.sidebar img {
    max-width: 100%;
    margin-bottom: 10px;
    width: 26px;
    height: 32px;
}

.sidebar-content {
    width: 100%;
}

.sidebar h3 {
    margin-top: 0;
    margin-bottom: 10px;
    font-family: SourceHanSansCN;
    font-weight: 500;
    font-size: 28px;
    color: #076FE3;
    line-height: 48px;
}

.sidebar ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar li {
    padding: 10px 15px;
    cursor: pointer;
    transition: all 0.3s ease;
    border-radius: 4px;
    margin-bottom: 2px;
    position: relative;
}

.sidebar li:hover {
    background-color: #f5f5f5;
    transform: translateX(5px);
}

.sidebar li.active {
    background-color: #007bff;
    color: white;
    transform: translateX(0);
}

.sidebar li.active::after {
    content: '';
    position: absolute;
    right: -11px;
    top: 50%;
    transform: translateY(-50%);
    border-width: 6px;
    border-style: solid;
    border-color: transparent transparent transparent #007bff;
}