.container {
    width: 100%;
    margin-top: 30px;
        margin-bottom: 81px;
}

.list-select {
    background-color: #fff;
    border-radius: 5px;
    -webkit-box-shadow: 0 5px 20px #efefef;
    -moz-box-shadow: 0 5px 20px #efefef;
    -ms-box-shadow: 0 5px 20px #efefef;
    -o-box-shadow: 0 5px 20px #efefef;
    box-shadow: 0 5px 20px #efefef;
    padding: 20px;

    display: flex;
    align-items: center;
}

.list-select .title {
        font-size: 17px;
    margin-right: 12px;
    font-weight: 900;
}

.list-select>ul {
    display: flex;
    gap: 20px;
    font-size: 16px;
}

.list-select>ul>li {
    display: inline-block;
    /* margin-right: 12px; */
    border-radius: 20px;
    color: #2592ff;
    border: 1px solid #fff;
    position: relative;
    /* margin-bottom: 12px; */
    cursor: pointer;
}

.list-select>ul>li:hover{
	border: 1px solid #0054b2;
}

.list-select>ul>li:hover>a{
	color: #0054b2;
}

.list-select>ul>li>a {
        padding: 2px 15px;
    display: block;
    color: #666666;
}

.list-select>ul>li.active{
    border: 1px solid #0054b2;
    color: #0054b2;
}
.list-select>ul>li.active>a{
    color: #0054b2;
}


.list-main {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    margin-top: 20px;
}

/* ===== 左侧课程列表 list-left ===== */
.list-left {
    flex: 0.97;
    min-width: 0;
}

.list-title {
        height: 56px;
    line-height: 56px;
    padding: 0 25px;
    background-color: #fff;
    border-radius: 5px;
    -webkit-box-shadow: 0 5px 20px #efefef;
    -moz-box-shadow: 0 5px 20px #efefef;
    -ms-box-shadow: 0 5px 20px #efefef;
    -o-box-shadow: 0 5px 20px #efefef;
    box-shadow: 0 5px 20px #efefef;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
}

.list-title h2 {
    font-size: 19px;
    font-weight: 700;
    color: #1a1a2e;
    line-height: 1.2;
    padding-left: 12px;
    border-left: 4px solid #0054b2;
}

.list-box {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.list-item {
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    overflow: hidden;
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.list-item:hover {
    box-shadow: 0 8px 24px rgba(0, 84, 178, 0.16);
    transform: translateY(-3px);
}

.list-item > a {
    display: flex;
    text-decoration: none;
    color: inherit;
}

.item-img {
    width: 380px;
    height: 200px;
    flex-shrink: 0;
    overflow: hidden;
    background: #f2f3f5;
}

.item-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.list-item:hover .item-img img {
    transform: scale(1.06);
}

.item-info {
    flex: 1;
    min-width: 0;
    padding: 18px 22px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.item-title h3 {
    font-size: 26px;
    font-weight: 600;
    color: #333;
    line-height: 1.4;
    /* margin: 0 0 10px; */
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    transition: color 0.2s ease;
}

.list-item:hover .item-title h3 {
    color: #0054b2;
}

.item-desc {
    font-size: 14px;
    color: #888;
    line-height: 1.7;
    margin-bottom: 14px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;

    margin-top: -20px;
}

.item-meta {
    font-size: 13px;
    color: #999;
}

/* ===== 右侧边栏 ===== */
.list-sidebar {
    width: 300px;
    flex-shrink: 0;
}