:root {
            --course-neon-green: #74e4de;
            --course-neon-glow: 0 0 15px rgba(0, 255, 65, 0.5);
            --course-dark-bg: #0a0a0a;
            --course-card-bg: rgba(15, 15, 15, 0.9);
            --course-border: rgba(255, 255, 255, 0.1);
            --course-text-primary: #ffffff;
            --course-text-secondary: #9ca3af;
        }

        .course-body {
            margin: 0;
            padding: 0;
            background: var(--course-dark-bg);
            color: var(--course-text-primary);
            /*font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;*/
            min-height: 100vh;
        }

        .course-layout {
            display: grid;
            grid-template-columns: 280px 1fr;
            gap: 2.5rem;
            padding: 2rem 0;
        }

        /* �������ʽ - ������ */
        .course-sidebar {
            position: sticky;
            top: 100px;
            height: fit-content;
            background: linear-gradient(145deg, rgba(10, 10, 10, 0.95), rgba(20, 20, 20, 0.95));
            border: 1px solid var(--course-border);
            border-radius: 12px;
            padding: 1.5rem;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
        }

        .course-sidebar h3 {
            font-size: 1.25rem;
            color: var(--course-neon-green);
            margin-bottom: 1.25rem;
            padding-bottom: 0.75rem;
            border-bottom: 2px solid rgba(0, 255, 65, 0.3);
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        .course-category-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .course-category-item {
            margin-bottom: 0.5rem;
        }

        .course-category-link {
            display: block;
            padding: 0.75rem 1rem;
            color: var(--course-text-secondary);
            text-decoration: none;
            border-radius: 6px;
            transition: all 0.3s ease;
            border: 1px solid transparent;
            font-size: 0.95rem;
        }

        .course-category-link:hover {
            background: rgba(0, 255, 65, 0.05);
            color: var(--course-neon-green);
            border-color: rgba(0, 255, 65, 0.2);
            transform: translateX(5px);
        }

        .course-category-link.active {
            background: rgba(0, 255, 65, 0.1);
            color: var(--course-neon-green);
            border-color: var(--course-neon-green);
            font-weight: bold;
            box-shadow: 0 0 10px rgba(0, 255, 65, 0.2);
        }

        /* ����������ʽ */
        .course-search-section {
            margin-bottom: 2.5rem;
        }

        .course-search-container {
            display: flex;
            gap: 1rem;
            align-items: center;
        }

        .course-search-input {
            flex: 1;
            padding: 0.875rem 1.25rem;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--course-border);
            border-radius: 8px;
            color: var(--course-text-primary);
            font-size: 1rem;
            transition: all 0.3s ease;
        }

        .course-search-input:focus {
            outline: none;
            border-color: var(--course-neon-green);
            box-shadow: 0 0 0 2px rgba(0, 255, 65, 0.1);
            background: rgba(255, 255, 255, 0.08);
        }

        .course-search-input::placeholder {
            color: var(--course-text-secondary);
            opacity: 0.7;
        }

        .course-search-button {
            padding: 0.875rem 2rem;
            background: linear-gradient(135deg, var(--course-neon-green), var(--course-neon-green));
            border: none;
            border-radius: 8px;
            color: #000;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s ease;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            white-space: nowrap;
        }

        .course-search-button:hover {
            transform: translateY(-2px);
            box-shadow: var(--course-neon-glow);
        }

        .course-search-button:active {
            transform: translateY(0);
        }

        /* ����������ʽ */
        .course-content-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: 2rem;
            margin-bottom: 3rem;
        }

        .course-item-card {
            background: linear-gradient(145deg, var(--course-card-bg), rgba(25, 25, 25, 0.9));
            border: 1px solid var(--course-border);
            border-radius: 12px;
            overflow: hidden;
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            position: relative;
        }

        .course-item-card:hover {
            transform: translateY(-8px);
            border-color: rgba(0, 255, 65, 0.3);
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4),
            0 0 20px rgba(0, 255, 65, 0.1);
        }

        .course-media-container {
            position: relative;
            width: 100%;
            padding-bottom: 56.25%; /* 16:9 ��߱� */
            overflow: hidden;
            background: #000;
        }

        .course-media-container img,
        .course-media-container iframe {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .course-item-card:hover .course-media-container img,
        .course-item-card:hover .course-media-container iframe {
            transform: scale(1.05);
        }

        .course-item-content {
            padding: 1.5rem;
        }

        .course-item-title {
            font-size: 1.125rem;
            font-weight: 600;
            color: var(--course-text-primary);
            margin-bottom: 0.75rem;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .course-item-link {
            text-decoration: none;
            color: inherit;
            display: block;
        }

        .course-item-link:hover .course-item-title {
            color: var(--course-neon-green);
        }

        .course-item-description {
            color: var(--course-text-secondary);
            font-size: 0.875rem;
            line-height: 1.5;
            margin-bottom: 1rem;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .course-item-type {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            background: rgba(0, 255, 65, 0.1);
            border: 1px solid rgba(0, 255, 65, 0.2);
            border-radius: 20px;
            font-size: 0.75rem;
            color: var(--course-neon-green);
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        /* ��ҳ��ʽ */
        .course-pagination {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 0.5rem;
            padding: 2rem 0;
        }

        .course-pagination a,
        .course-pagination span {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 40px;
            height: 40px;
            padding: 0 0.75rem;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--course-border);
            border-radius: 6px;
            color: var(--course-text-secondary);
            text-decoration: none;
            transition: all 0.3s ease;
        }

        .course-pagination a:hover {
            background: rgba(0, 255, 65, 0.1);
            border-color: rgba(0, 255, 65, 0.3);
            color: var(--course-neon-green);
            transform: translateY(-2px);
        }

        /*.course-pagination .page-current {*/
        /*    background: rgba(0, 255, 65, 0.1);*/
        /*    border-color: var(--course-neon-green);*/
        /*    color: var(--course-neon-green);*/
        /*    box-shadow: 0 0 10px rgba(0, 255, 65, 0.2);*/
        /*}*/

        .course-pagination .page-current{
            background: rgba(98, 196, 187, 0.1);
            border-color: rgb(98 196 187);
            color: var(--blog-neon-green);
        }

        /* ��Ӧʽ��� */
        @media (max-width: 1024px) {
            .course-layout {
                grid-template-columns: 240px 1fr;
                gap: 2rem;
            }

            .course-content-grid {
                grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
                gap: 1.5rem;
            }
        }

        @media (max-width: 768px) {
            .course-layout {
                grid-template-columns: 1fr;
                gap: 2rem;
            }

            .course-sidebar {
                position: relative;
                top: 0;
                /*width: 100%;*/
            }

            .course-search-container {
                flex-direction: column;
                gap: 1rem;
            }

            .course-search-input,
            .course-search-button {
                /*width: 100%;*/
            }

            .course-content-grid {
                grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
                gap: 1rem;
            }

            .course-category-list {
                display: grid;
                grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
                gap: 0.5rem;
            }

            .course-category-link:hover {
                transform: translateY(-2px);
            }
        }

        @media (max-width: 480px) {
            .course-container {
                padding: 0 1rem;
            }

            .course-content-grid {
                grid-template-columns: 1fr;
            }

            .course-pagination {
                flex-wrap: wrap;
            }

            .course-category-list {
                grid-template-columns: 1fr;
            }
        }

        /* ״ָ̬ʾ�� */
        .course-status-badge {
            margin-bottom: 1rem;
        }

        /* �ָ��� */
        .course-divider {
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--course-neon-green), transparent);
            margin: 2rem 0;
            opacity: 0.3;
        }

        /* �ƶ����Ż� */
        @media (hover: none) and (pointer: coarse) {
            .course-item-card:hover {
                transform: none;
            }

            .course-category-link:active,
            .course-pagination a:active {
                background: rgba(0, 255, 65, 0.1);
                transform: scale(0.98);
            }
        }

        /* ����ռλ�� */
        .course-placeholder {
            background: linear-gradient(90deg, rgba(255,255,255,0.05) 25%, rgba(255,255,255,0.1) 50%, rgba(255,255,255,0.05) 75%);
            background-size: 200% 100%;
            animation: course-loading 1.5s infinite;
            border-radius: 8px;
        }

        @keyframes course-loading {
            0% { background-position: -200% 0; }
            100% { background-position: 200% 0; }
        }