.about-icon {
            cursor: pointer;
        }

        /* 弹窗样式 */
        .modal {
            display: none;
            position: fixed;
            z-index: 1000;
            left: 0;
            top: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.5);
        }

        .modal-content {
            background-color: white;
            margin: 10% auto;
            padding: 20px;
            border: 3px solid #000;
            width: 90%;
            max-width: 500px;
            position: relative;
        }

        .modal-header {
            font-size: 18px;
            font-weight: bold;
            margin-bottom: 15px;
            border-bottom: 2px solid #000;
            padding-bottom: 8px;
        }

        .close {
            position: absolute;
            right: 10px;
            top: 10px;
            font-size: 24px;
            font-weight: bold;
            cursor: pointer;
            width: 30px;
            height: 30px;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 2px solid #000;
            background: white;
        }

        .close:hover {
            background: #000;
            color: white;
        }

        .custom-input {
            margin-bottom: 15px;
        }

        .custom-input textarea {
            width: 100%;
            height: 120px;
            border: 2px solid #000;
            font-family: 'Courier New', monospace;
            font-size: 12px;
            padding: 10px;
            resize: vertical;
        }

        .modal-buttons {
            display: flex;
            gap: 10px;
            justify-content: flex-end;
            margin-top: 15px;
        }

        .modal-buttons button {
            padding: 6px 16px;
            background: white;
            cursor: pointer;
            font-family: inherit;
            font-weight: bold;
            border-radius: 8px;
            border: 2px solid #000;
            color: #000;
        }

        .modal-buttons button:hover {
            background: #000;
            color: white;
        }