* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
        }
        
        body {
            background: linear-gradient(135deg, #6e8efb, #a777e3);
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 20px;
        }
        
        .login-card {
            background: rgba(255, 255, 255, 0.95);
            border-radius: 20px;
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
            padding: 40px 35px;
            width: 100%;
            max-width: 450px;
            text-align: center;
        }
        
        .logo {
            width: 80px;
            height: 80px;
            margin: 0 auto 20px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #6e8efb, #a777e3);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        
        .logo i {
            font-size: 36px;
            color: white;
        }
        
        h1 {
            color: #333;
            margin-bottom: 8px;
            font-weight: 700;
            font-size: 28px;
        }
        
        .subtitle {
            color: #666;
            margin-bottom: 30px;
            font-size: 16px;
        }
        
        .input-group {
            position: relative;
            margin-bottom: 25px;
            text-align: left;
        }
        
        .input-group label {
            display: block;
            margin-bottom: 8px;
            color: #555;
            font-weight: 500;
            font-size: 14px;
        }
        
        .input-group input {
            width: 100%;
            padding: 15px 20px;
            border: 2px solid #e1e5ee;
            border-radius: 12px;
            font-size: 16px;
            transition: all 0.3s ease;
            background: white;
        }
        
        .input-group input:focus {
            border-color: #6e8efb;
            box-shadow: 0 0 0 3px rgba(110, 142, 251, 0.2);
            outline: none;
        }
        
        .login-btn {
            width: 100%;
            padding: 16px;
            background: linear-gradient(135deg, #6e8efb, #a777e3);
            color: white;
            border: none;
            border-radius: 12px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 5px 15px rgba(110, 142, 251, 0.4);
            margin-top: 10px;
        }
        
        .login-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(110, 142, 251, 0.6);
        }
        
        .login-btn:disabled {
            background: #cccccc;
            cursor: not-allowed;
            transform: none;
            box-shadow: none;
        }
        
        .error-message {
            background: rgba(244, 67, 54, 0.1);
            color: #f44336;
            padding: 15px;
            border-radius: 10px;
            margin-bottom: 20px;
            text-align: left;
            border-left: 4px solid #f44336;
            word-wrap: break-word;
            word-break: break-all;
            white-space: normal;
            line-height: 1.5;
        }
        
        .error-message a {
            color: #6e8efb;
            text-decoration: none;
            font-weight: 500;
        }
        
        .error-message a:hover {
            text-decoration: underline;
        }
        
        .url-break {
            word-break: break-all;
            white-space: normal;
            display: block;
            margin: 8px 0;
            padding: 8px;
            background: rgba(0, 0, 0, 0.05);
            border-radius: 6px;
            font-family: monospace;
            font-size: 14px;
        }
        
        .robot-info {
            background: rgba(110, 142, 251, 0.1);
            border-radius: 12px;
            padding: 15px;
            margin: 20px 0;
            text-align: left;
        }
        
        .robot-avatar {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            float: left;
            margin-right: 15px;
            border: 2px solid #a777e3;
        }
        
        .robot-details {
            overflow: hidden;
        }
        
        .robot-name {
            font-weight: 600;
            color: #333;
            margin-bottom: 4px;
        }
        
        .robot-status {
            font-size: 13px;
            color: #666;
        }
        
        .status-success {
            color: #4CAF50;
        }
        
        .status-error {
            color: #f44336;
        }
        
        .input-icon {
            position: absolute;
            right: 15px;
            top: 42px;
            color: #a777e3;
        }