* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: #f5f5f5;
            color: #333;
            line-height: 1.6;
        }
        
        .container {
            max-width: 100%;
            padding: 20px 15px;
        }
        
        .header {
            display: flex;
            align-items: center;
            margin-bottom: 25px;
        }
        
        .back-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background-color: #fff;
            border-radius: 50%;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
            text-decoration: none;
            color: #333;
            font-size: 1.2rem;
            margin-right: 15px;
        }
        
        h1 {
            font-size: 1.5rem;
            font-weight: 600;
        }
        
        .form-group {
            margin-bottom: 20px;
        }
        
        label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            color: #555;
        }
        
        input, textarea, select {
            width: 100%;
            padding: 15px;
            border: 1px solid #ddd;
            border-radius: 10px;
            font-size: 1rem;
            font-family: inherit;
            background-color: white;
        }
        
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #4CAF50;
            box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.1);
        }
        
        textarea {
            min-height: 150px;
            resize: vertical;
        }
        
        .qr-upload-btn {
            display: inline-block;
            width: 100%;
            background-color: #2196F3;
            color: white;
            border: none;
            padding: 12px;
            border-radius: 8px;
            font-size: 1rem;
            cursor: pointer;
            text-align: center;
            margin-top: 10px;
            transition: all 0.3s ease;
        }
        
        .qr-upload-btn:hover {
            background-color: #1976D2;
        }
        
        .qr-upload-btn i {
            margin-right: 8px;
        }
        
        #image-input {
            display: none;
        }
        
        .submit-btn {
            display: block;
            width: 100%;
            background-color: #4CAF50;
            color: white;
            border: none;
            padding: 16px;
            font-size: 1.1rem;
            border-radius: 10px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 4px 8px rgba(76, 175, 80, 0.2);
            margin-top: 20px;
        }
        
        .submit-btn:active {
            background-color: #45a049;
            transform: translateY(2px);
            box-shadow: 0 2px 4px rgba(76, 175, 80, 0.2);
        }
        
        .submit-btn:disabled {
            background-color: #ccc;
            cursor: not-allowed;
        }
        
        .message {
            padding: 12px 15px;
            border-radius: 8px;
            margin-bottom: 20px;
            display: none;
        }
        
        .success {
            background-color: #d4edda;
            color: #155724;
            border: 1px solid #c3e6cb;
        }
        
        .error {
            background-color: #f8d7da;
            color: #721c24;
            border: 1px solid #f5c6cb;
        }
        
        .char-count {
            text-align: right;
            font-size: 0.85rem;
            color: #888;
            margin-top: 5px;
        }
        
        .char-count.limit {
            color: #f44336;
        }
        
        /* 弹窗样式 */
        .qr-modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: rgba(0, 0, 0, 0.5);
            z-index: 1000;
            justify-content: center;
            align-items: center;
        }
        
        .qr-modal-content {
            background-color: white;
            padding: 20px;
            border-radius: 10px;
            max-width: 300px;
            width: 90%;
            text-align: center;
        }
        
        .qr-modal-title {
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 15px;
            color: #333;
        }
        
        .qr-modal-text {
            background-color: #f5f5f5;
            padding: 15px;
            border-radius: 6px;
            margin-bottom: 20px;
            word-break: break-all;
            font-size: 0.9rem;
            max-height: 150px;
            overflow-y: auto;
        }
        
        .qr-modal-buttons {
            display: flex;
            gap: 10px;
        }
        
        .qr-modal-btn {
            flex: 1;
            padding: 10px;
            border: none;
            border-radius: 6px;
            cursor: pointer;
            font-weight: 500;
            transition: all 0.3s ease;
        }
        
        .qr-modal-btn.confirm {
            background-color: #4CAF50;
            color: white;
        }
        
        .qr-modal-btn.confirm:hover {
            background-color: #45a049;
        }
        
        .qr-modal-btn.cancel {
            background-color: #f5f5f5;
            color: #666;
        }
        
        .qr-modal-btn.cancel:hover {
            background-color: #e0e0e0;
        }