.ann-modal-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.85);
            display: flex;
            justify-content: center;
            align-items: center;
            z-index: 9999;
            opacity: 0;
            visibility: hidden;
            transition: all 0.5s ease;
            backdrop-filter: blur(10px);
        }
        
        .ann-modal-overlay.active {
            opacity: 1;
            visibility: visible;
        }
        
        .ann-modal {
            width: 90%;
            max-width: 800px;
            background: #ffffff;
            border-radius: 8px;
            box-shadow: 0 10px 50px rgba(0, 0, 0, 0.3);
            overflow: hidden;
            transform: scale(0.95);
            opacity: 0;
            transition: all 0.5s ease;
        }
        
        .ann-modal-overlay.active .ann-modal {
            transform: scale(1);
            opacity: 1;
        }
        /* 顶部标题区域 */
        
        .ann-header {
            background: #e6f2ff;
            padding: 25px 30px;
            border-bottom: 1px solid #cce0ff;
        }
        
        .ann-title {
            color: #0066cc;
            font-size: 28px;
            font-weight: 600;
            margin-bottom: 15px;
        }
        /* 正文内容 */
        
        .ann-content {
            padding: 30px;
            color: #333333;
            line-height: 1.8;
        }
        
        .ann-content p {
            margin-bottom: 15px;
        }
        /* 功能亮点区域 */
        
        .ann-features-title {
            text-align: center;
            color: #0066cc;
            font-size: 22px;
            font-weight: 600;
            margin: 30px 0;
            padding-bottom: 15px;
            border-bottom: 2px solid #e6f2ff;
        }
        
        .ann-features-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
            margin-bottom: 30px;
        }
        
        .ann-feature-card {
            background: #ffffff;
            border: 1px solid #e1e8ff;
            border-radius: 8px;
            padding: 25px;
            box-shadow: 0 5px 15px rgba(0, 85, 204, 0.08);
            transition: all 0.3s ease;
        }
        
        .ann-feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0, 85, 204, 0.12);
        }
        
        .ann-feature-header {
            display: flex;
            align-items: center;
            margin-bottom: 15px;
            color: #0066cc;
            font-size: 18px;
            font-weight: 600;
        }
        
        .ann-feature-icon {
            width: 40px;
            height: 40px;
            background: #e6f2ff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 12px;
            color: #0066cc;
            font-size: 18px;
        }
        
        .ann-feature-desc {
            color: #555555;
            font-size: 16px;
            line-height: 1.6;
        }
        /* 底部按钮 */
        
        .ann-footer {
            padding: 25px 30px;
            background: #f8faff;
            border-top: 1px solid #e1e8ff;
            text-align: center;
        }
        
        .ann-confirm-btn {
            padding: 14px 40px;
            background: #0066cc;
            color: white;
            border: none;
            border-radius: 5px;
            font-size: 18px;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 4px 12px rgba(0, 85, 204, 0.25);
        }
        
        .ann-confirm-btn:hover {
            background: #0055b3;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(0, 85, 204, 0.3);
        }
        /* 响应式设计 */
        
        @media (max-width: 768px) {
            .ann-features-grid {
                grid-template-columns: 1fr;
            }
            .ann-modal {
                width: 95%;
            }
        }