* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .container {
            width: 100%;
            max-width: 500px;
            padding: 20px;
        }
        
        .card {
            background: white;
            border-radius: 12px;
            box-shadow: 0 20px 60px rgba(0,0,0,0.3);
            padding: 30px;
            animation: slideIn 0.3s ease-out;
        }
        
        @keyframes slideIn {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        .logo {
            text-align: center;
            font-size: 48px;
            margin-bottom: 15px;
        }
        
        .title {
            text-align: center;
            font-size: 22px;
            font-weight: 600;
            color: #333;
            margin-bottom: 25px;
        }
        
        .tabs {
            display: flex;
            gap: 0;
            margin-bottom: 25px;
            background: #f5f5f5;
            padding: 4px;
            border-radius: 8px;
        }
        
        .tab-btn {
            flex: 1;
            padding: 8px 12px;
            border: none;
            background: transparent;
            color: #666;
            font-size: 13px;
            font-weight: 500;
            cursor: pointer;
            border-radius: 6px;
            transition: all 0.2s;
        }
        
        .tab-btn.active {
            background: white;
            color: #2a5298;
            box-shadow: 0 2px 4px rgba(0,0,0,0.08);
        }
        
        .form-group {
            margin-bottom: 14px;
        }
        
        .form-group {
            display: flex;
            align-items: center;
            margin-bottom: 14px;
        }
        
        .form-group label {
            flex-shrink: 0;
            width: 80px;
            font-size: 13px;
            font-weight: 500;
            color: #333;
            margin-right: 8px;
        }
        
        .form-group input {
            flex: 1;
            padding: 10px 12px;
            border: 1px solid #ddd;
            border-radius: 6px;
            font-size: 13px;
            transition: all 0.2s;
            min-width: 0;
        }
        
        .captcha-group {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
        }
        
        .captcha-group input {
            width: 220px;
            flex: none;
        }
        
        .form-group input:focus {
            outline: none;
            border-color: #2a5298;
            box-shadow: 0 0 0 3px rgba(42, 82, 152, 0.1);
        }
        
        .form-content {
            display: none;
        }
        
        .form-content.active {
            display: block;
        }
        
        .btn-group {
            display: flex;
            gap: 8px;
            margin-top: 18px;
        }
        
        .btn {
            flex: 1;
            padding: 10px;
            border: none;
            border-radius: 6px;
            font-size: 13px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s;
        }
        
        .btn-primary {
            background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
            color: white;
        }
        
        .btn-primary:hover {
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(42, 82, 152, 0.4);
        }
        
        .btn-primary:active {
            transform: translateY(0);
        }
        
        .btn-secondary {
            background: #f5f5f5;
            color: #666;
        }
        
        .btn-secondary:hover {
            background: #e8e8e8;
        }
        
        .btn-secondary:active {
            background: #e0e0e0;
        }
        
        .send-code-btn {
            flex: 0 0 auto;
            width: 85px;
            padding: 10px 8px;
            background: #f5f5f5;
            color: #2a5298;
            border: none;
            border-radius: 6px;
            font-size: 12px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s;
        }
        
        .send-code-btn:hover {
            background: #e8e8e8;
        }
        
        .send-code-btn:disabled {
            color: #ccc;
            cursor: not-allowed;
        }
        
        .code-input-group {
            display: flex;
			width: 400px;
            gap: 8px;
        }
        
        .code-input-group input {
            flex: 1;
        }
        
        .alert {
            padding: 10px 12px;
            border-radius: 6px;
            margin-bottom: 15px;
            font-size: 13px;
            display: none;
        }
        
        .alert.show {
            display: block;
            animation: slideIn 0.3s ease-out;
        }
        
        .alert-error {
            background: #fee;
            color: #c33;
            border: 1px solid #fcc;
        }
        
        .alert-success {
            background: #efe;
            color: #3c3;
            border: 1px solid #cfc;
        }
        
        .form-footer {
            text-align: center;
            font-size: 12px;
            color: #999;
            margin-top: 15px;
        }

        .captcha-img {
            width: 90px;
            height: 35px;
            cursor: pointer;
        }