.left-sidebar {
            margin-bottom: 20px;
        }
      .blue-menu {
            background-color: #fff;
            color: #000;
            border-radius: 4px;
            overflow: hidden;
            box-shadow: 0 2px 8px rgba(0,0,0,0.05);
            margin-bottom: 15px;
        }
        .blue-menu-main {
            display: block;
            color: #fff;
            text-align: center;
            padding: 10px 0;
            font-weight: bold;
            font-size: 16px;
            text-decoration: none;
            background-color: #0f467e;
            border-bottom: 1px solid rgba(255,255,255,0.2);
        }
        .blue-menu-sub {
            display: block;
            color: #000;
            text-align: center;
            padding: 9px 0;
            font-size: 14px;
            text-decoration: none;
            border-bottom: 1px solid rgba(0,0,0,0.15);
            transition: background 0.2s;
        }
        .blue-menu-sub:hover {
            background-color: #1e61b3;
            color: #fff;
        }
        .blue-menu-sub:last-child {
            border-bottom: none;
        }
        
                .top-image-placeholder {
            width: 100%;
            background-color: #f1f3f5;
            border: 1px dashed #ced4da;
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #6c757d;
            font-size: 16px;
        }
        
        .ad-banner-box {
            background: #fff;
            border: 1px solid #e0e0e0;
            border-radius: 4px;
            overflow: hidden;
            box-shadow: 0 2px 8px rgba(0,0,0,0.05);
        }
        .ad-img-placeholder {
            background: linear-gradient(135px, #2b7cd9, #e67e22);
            color: white;
            padding: 0;
            text-align: center;
            position: relative;
        }

        /* ================= 中间：原产品分类导航样式 ================= */
        .sidebar {
            background: #f1f1f1;
            border-radius: 4px;
            overflow: hidden;
            margin-bottom: 20px;
        }
        .sidebar-header {
            background-color: #c8161d;
            color: white;
            padding: 12px 20px;
            font-weight: bold;
            font-size: 18px;
            border-top-left-radius: 4px;
            border-top-right-radius: 15px;
        }
        .sidebar-footer {
            background-color: #c8161d;
            color: white;
            font-size: 12px;
            padding: 6px 12px;
            display: inline-block;
            border-top-left-radius: 8px;
            border-bottom-right-radius: 4px;
            float: right;
        }
        .menu-item {
            border-bottom: 1px solid #e0e0e0;
        }
        .menu-title {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 12px 20px;
            font-weight: 500;
            color: #333;
            text-decoration: none;
            background: #fdfdfd;
            cursor: pointer;
        }
        .menu-item.active .menu-title-text {
            color: #c8161d;
            font-weight: bold;
        }
        .sub-menu {
            list-style: none;
            padding: 5px 0 10px 35px;
            background: #fff;
            margin: 0;
        }
        .sub-menu li a {
            display: block;
            padding: 5px 0;
            color: #888;
            text-decoration: none;
            font-size: 14px;
        }
        .sub-menu li.active a {
            color: #c8161d;
            font-weight: bold;
        }
        .toggle-btn {
            background: #ccc;
            color: white;
            border-radius: 50%;
            width: 18px;
            height: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
        }

        /* ================= 右侧：新闻列表及大图占位区域样式 ================= */
        .right-content-card {
            background: #fff;
            border: 1px solid #eef0f2;
            border-radius: 8px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.04);
            padding: 20px;
            margin-bottom: 20px;
        }
        .top-image-placeholder {
            width: 100%;
            background-color: #f1f3f5;
            border: 1px dashed #ced4da;
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #6c757d;
            font-size: 16px;
        }
        .news-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .news-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 12px 0;
            border-bottom: 1px dashed #dee2e6;
        }
        .news-item:last-child {
            border-bottom: none;
        }
        .news-link {
            color: #333;
            text-decoration: none;
            font-size: 15px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            max-width: 75%;
            transition: color 0.2s;
        }
        .news-link:hover {
            color: #2b7cd9;
        }
        .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .news-tag {
            font-size: 12px;
            padding: 2px 8px;
            border-radius: 4px;
            background-color: #f8f9fa;
            border: 1px solid #e9ecef;
            color: #6c757d;
        }
        .news-date {
            font-size: 14px;
            color: #999;
            white-space: nowrap;
        }
        
        /* 自定义分页美化样式 */
        .custom-pagination .page-link {
            color: #555;
            border-color: #dee2e6;
            padding: 6px 12px;
            font-size: 14px;
        }
        .custom-pagination .page-link:hover {
            color: #2b7cd9;
            background-color: #f8f9fa;
            border-color: #dee2e6;
        }
        .custom-pagination .page-item.active .page-link {
            background-color: #2b7cd9;
            border-color: #2b7cd9;
            color: #fff;
        }
        .custom-pagination .page-item.disabled .page-link {
            color: #bbb;
            background-color: #fff;
            border-color: #dee2e6;
        }
        
        .custom-content-wrap {
            width: 100%;
            max-width: 1350px; 
            padding-left: 15px;
            padding-right: 15px;
        }