/* ========== 视频弹窗 ========== */
        .video-modal-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.85);
            backdrop-filter: blur(5px);
            z-index: 9999;
            display: flex;
            align-items: center;
            justify-content: center;
            visibility: visible;
            opacity: 1;
            transition: opacity 0.25s ease;
            cursor: pointer; /* 点击背景关闭 */
        }
        
        /* 模态框内容容器 - 视频区域 */
        .video-modal-container {
            position: relative;
            width: 90%;
            max-width: 1280px;
            margin: 0 auto;
            cursor: default;
            animation: modalFadeIn 0.3s ease;
        }
        
        /* 关闭按钮独立样式*/
        .video-modal-close {
            position: absolute;
            top: -40px;
            right: -5px;
            width: 36px;
            height: 36px;
            background: rgba(0, 0, 0, 0.7);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            font-weight: bold;
            color: white;
            cursor: pointer;
            transition: background 0.2s;
            z-index: 10001;
            font-family: Arial, Helvetica, sans-serif;
            border: none;
            line-height: 1;
            box-shadow: 0 2px 8px rgba(0,0,0,0.3);
        }
        .video-modal-close:hover {
            background: #ff4d4d;
            transform: scale(1.05);
        }
        
        /* 响应式视频包裹层 */
        .video-responsive-wrapper {
            position: relative;
            width: 100%;
            padding-bottom: 56.25%; /* 16:9比例 */
            height: 0;
            background: #000;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 20px 35px rgba(0, 0, 0, 0.5);
        }
        
        .video-responsive-wrapper iframe {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            border: 0;
            border-radius: 12px;
        }
        
        /* 优雅入场动画 */
        @keyframes modalFadeIn {
            from {
                opacity: 0;
                transform: scale(0.96);
            }
            to {
                opacity: 1;
                transform: scale(1);
            }
        }
        
        /* 防止滚动条抖动以及背景滚动，在模态框打开时给body加类 */
        body.modal-open {
            overflow: hidden;
            padding-right: 0; /* 避免滚动条偏移 */
        }
        
        /* 移动端适配：小屏幕让关闭按钮更舒适 */
        @media (max-width: 640px) {
            .video-modal-container {
                width: 95%;
            }
            .video-modal-close {
                top: -45px;
                right: 0px;
                width: 32px;
                height: 32px;
                font-size: 22px;
            }
        }