/* 右侧悬浮功能框样式 */
        .floating-sidebar {
            position: fixed;
            right: 20px;
            top: 60%; /* 整体向下移动 */
            transform: translateY(-50%);
            width: 63px; /* 缩小宽度 */
            z-index: 1000;
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        
        .consult-section {
            background-color: #cb3536; /* 红色背景 */
            border-radius: 50px; /* 圆弧边角 */
            margin-bottom: 15px;
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 15px 0px; /* 调整内边距 */
            box-shadow: 0 4px 12px rgba(0,0,0,0.15);
            border: 1px solid #cb3536;
            width: 100%;
        }
        
        .consult-icon {
            width: 30px; /* 稍微缩小图标 */
            height: 30px;
            margin-bottom: 8px;
            transition: all 0.3s;
            filter: brightness(0) invert(1); /* 白色图标 */
        }
        
        .consult-btn {
            background-color: transparent; /* 透明背景 */
            color: white; /* 白色字体 */
            border: none;
            border-radius: 6px;
            padding: 6px 8px;
            font-size: 14px; /* 稍微缩小字体 */
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s;
            width: 100%;
            box-shadow: none;
        }
        
        .consult-btn:hover {
 
            transform: translateY(-2px);
        }
        
        .functions-container {
            background-color: white;
            border-radius: 50px; /* 圆弧边角 */
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 12px 8px; /* 调整内边距 */
            box-shadow: 0 4px 12px rgba(0,0,0,0.15);
            border: 1px solid #f0f0f0;
            width: 100%;
        }
        
        .floating-item {
            width: 100%;
            background-color: transparent;
            border-radius: 8px; /* 圆弧边角 */
            margin-bottom: 14px; /* 调整间距 */
            cursor: pointer;
            transition: all 0.3s;
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 8px 4px; /* 调整内边距 */
        }
        
        .floating-item:last-child {
            margin-bottom: 0;
        }
        
        .floating-item:hover {
            background-color: #cb3536;
            transform: translateX(-3px);
        }
        
        .floating-item:hover .item-icon {
            filter: brightness(0) invert(1);
        }
        
        .floating-item:hover .item-text {
            color: white;
        }
         .floating-item:last-child:hover .item-icon{
            filter:inherit;
        }
        .item-icon {
            width: 22px; /* 稍微缩小图标 */
            
            margin-bottom: 4px; /* 调整间距 */
            transition: all 0.3s;
        }
        
        .item-text {
            font-size: 11px; /* 稍微缩小字体 */
            color: #333;
            text-align: center;
            transition: all 0.3s;
        }
        
        /* 新增cont_3-container样式 */
        .cont_3-container {
            /* background-color: #fff; */
            padding: 40px 10px;
            margin-top: 40px;
        }
        
        .cont_3-header {
            text-align: center;
            margin-bottom: 30px;
        }
        
        .cont_3-title {
            font-size: 28px;
            font-weight: bold;
            color: #333;
            margin-bottom: 10px;
        }
        
        .cont_3-desc {
            font-size: 16px;
            color: #666;
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.6;
        }
        
        .cont_3-nav {
            background-color: #cb3536;
            border-radius: 8px;
            padding: 10px 20px;
            margin-bottom: 30px;
            display: flex;
            justify-content: center;
            gap: 30px;
        }
        
        .cont_3-nav-item {
            color: white;
            font-size: 16px;
            font-weight: 500;
            cursor: pointer;
            padding: 8px 16px;
            border-radius: 4px;
            transition: all 0.3s;
        }
        
        .cont_3-nav-item.active {
            background-color: white;
            color: #cb3536;
        }
        
        .cont_3-nav-item:hover {
            background-color: #FFF;
            color: #cb3536;
        }
        
        /* 轮播图样式 - 修改布局 */
        .swiper2_container {
            position: relative;
            /* overflow: hidden; */
            margin: 0 auto;
            max-width: 1200px;
            width: 100%;
        }
        
        .swiper2_wrapper {
            display: flex;
            transition: transform 0.5s ease;
            width: 100%;
            padding: 10px 0;
        }
        
        .swiper2_slide {
            flex: 0 0 33.333%;
            padding: 0 15px;
            box-sizing: border-box;
            width: 33.333%;
        }
        
        .course-card {
            background: white;
            border-radius: 8px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            overflow: hidden;
            transition: transform 0.3s;
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        
        .course-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
        }
        
        .course-thumbnail {
            position: relative;
            width: 100%;
            height: 180px;
            overflow: hidden;
        }
        
        .course-thumbnail img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        
        .play-button {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 50px;
            height: 50px;
            background: rgba(0, 0, 0, 0.6);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
        }
        
        .play-button::after {
            content: '';
            width: 0;
            height: 0;
            border-left: 12px solid white;
            border-top: 8px solid transparent;
            border-bottom: 8px solid transparent;
            margin-left: 4px;
        }
        
        .course-content {
            padding: 20px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }
        
        .course-title {
            font-size: 18px;
            font-weight: bold;
            color: #333;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        
        .course-time {
            font-size: 14px;
            color: #999;
            margin-bottom: 12px;
        }
        
        .course-desc {
            font-size: 14px;
            color: #666;
            line-height: 1.5;
            margin-bottom: 15px;
            overflow: hidden;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
        }
        
        .course-tags {
            display: flex;
            gap: 8px;
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        
        .course-tag {
            font-size: 12px;
            color: #cb3536;
            border: 1px solid #cb3536;
            border-radius: 4px;
            padding: 4px 8px;
        }
        
        .course-footer {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: auto;
        }
        
        .enroll-btn {
            background-color: #cb3536;
            color: white;
            border: none;
            border-radius: 4px;
            padding: 8px 20px;
            font-size: 14px;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.3s;
            display: flex;
            align-items: center;
            gap: 5px;
        }
        
     
        
        /* 修改轮播图控制按钮位置 - 调整到轮播图外部 */
        .swiper2_controls {
            position: absolute;
            top: 50%;
            left: -60px;
            right: -60px;
            transform: translateY(-50%);
            display: flex;
            justify-content: space-between;
            align-items: center;
            pointer-events: none;
            z-index: 10;
        }
        
        .swiper2_prev, .swiper2_next,.swiper3_prev, .swiper3_next {
            background-color: white;
            border: 2px solid #a1a1a1;
            border-radius: 50%;
            width: 50px;
            height: 50px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.3s;
            /* box-shadow: 0 2px 8px rgba(0,0,0,0.1); */
                border: 2px solid #a1a1a1;
            pointer-events: all;
            font-size: 18px;
            color: #666;
        }
        
        .swiper2_prev:hover, .swiper2_next:hover {
            background-color: #cb3536;
            color: white;
            border-color: #cb3536;
            transform: scale(1.1);
        }
        .swiper3_prev:hover, .swiper3_next:hover {
            background-color: #cb3536;
            color: white;
            border-color: #cb3536;
            transform: scale(1.1);
        }
        
        /* 响应式调整 */
        @media (max-width: 768px) {
            .floating-sidebar {
                right: 10px;
                width: 60px;
            }
            
            .consult-btn {
                padding: 5px 6px;
                font-size: 11px;
            }
            
            .consult-icon {
                width: 25px;
                height: 25px;
            }
            
            .item-text {
                font-size: 10px;
            }
            
            .functions-container {
                padding: 10px 0px;
            }
            
            .cont_3-nav {
                flex-wrap: wrap;
                gap: 10px;
            }
            
            .swiper2_slide {
                flex: 0 0 100%;
                width: 100%;
            }
            
            .cont_3-title {
                font-size: 24px;
            }
            
            .swiper2_prev, .swiper2_next {
                width: 40px;
                height: 40px;
                font-size: 16px;
            }
            
            .swiper2_controls {
                left: -40px;
                right: -40px;
            }
        }
        
        @media (max-width: 480px) {
            .swiper2_controls {
                left: -20px;
                right: -20px;
            }
            
            .swiper2_prev, .swiper2_next {
                width: 35px;
                height: 35px;
                font-size: 14px;
            }
        }
          .navbar .auth-links{position: relative;}
    .navbar .usinfs{top: 105%;}