:root {
            --primary-color: #2c7da0;
            --secondary-color: #a9d6e5;
            --accent-color: #01497c;
            --light-gray: #f8f9fa;
            --border-color: #eaeaea;
            --text-color: #333;
            --text-muted: #6c757d;
            --success-color: #28a745;
            --warning-color: #ffc107;
            --danger-color: #dc3545;
        }.reading-time-result {
    text-align: center;
    padding: 2rem;
    background-color: white;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    margin: 1.5rem 0;
    box-shadow: 0 5px 15px rgb(0 0 0 / 5%);
}.reading-time-value {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}.reading-time-label {
    font-size: 1.5rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}.reading-details {
    background-color: var(--light-gray);
    border-radius: 6px;
    padding: 1rem;
    margin: 1rem 0;
}.detail-item {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
}.detail-label {
    font-weight: 600;
}.detail-value {
    color: var(--primary-color);
    font-weight: 600;
}.optimization-card {
    background-color: white;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    margin: 1.5rem 0;
}.optimization-header {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
}.optimization-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(44, 125, 160, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 1rem;
    color: var(--primary-color);
}.optimization-title {
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0;
}.optimization-content {
    padding-left: 55px;
}
        .speed-control {
    display: flex;
    align-items: center;
    margin-bottom: 1.5rem;
    background-color: white;
    padding: 1rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}.speed-label {
    margin-right: 1rem;
    font-weight: 600;
}.speed-slider {
    flex: 1;
    margin-right: 1rem;
}
.form-range {
    width: 100%;
    height: 1.5rem;
    padding: 0;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-color: transparent;
}
        
        
        /* Reading Time Calculator Specific Styles */
        .text-input-container {
            position: relative;
            margin-bottom: 1.5rem;
        }
        
        .text-input {
            min-height: 300px;
            resize: vertical;
            font-size: 1rem;
            line-height: 1.6;
        }
        
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 1.5rem;
            margin: 1.5rem 0;
        }
        
        .stat-card {
            background-color: white;
            border-radius: 8px;
            border: 1px solid var(--border-color);
            padding: 1.5rem;
            text-align: center;
            transition: all 0.3s;
        }
        
        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        
        .stat-value {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 0.5rem;
        }
        
        .stat-label {
            color: var(--text-muted);
            font-size: 1rem;
        }
        
        .reading-time {
            background-color: rgba(44, 125, 160, 0.1);
            border-left: 3px solid var(--primary-color);
        }
        
        .keyword-list {
            background-color: white;
            border-radius: 8px;
            border: 1px solid var(--border-color);
            padding: 1.5rem;
            margin: 1.5rem 0;
        }
        
        .keyword-item {
            display: inline-block;
            background-color: rgba(44, 125, 160, 0.1);
            border-radius: 20px;
            padding: 0.5rem 1rem;
            margin: 0.5rem;
            font-size: 0.9rem;
        }
        
        .keyword-count {
            font-weight: 600;
            color: var(--primary-color);
            margin-left: 0.3rem;
        }
        
        .density-meter {
            height: 10px;
            background-color: #e9ecef;
            border-radius: 5px;
            margin: 0.5rem 0;
            overflow: hidden;
        }
        
        .density-fill {
            height: 100%;
            background-color: var(--primary-color);
            border-radius: 5px;
        }
        
        .advanced-stats {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 1.5rem;
            margin: 1.5rem 0;
        }
        
        .advanced-stat {
            background-color: white;
            border-radius: 8px;
            border: 1px solid var(--border-color);
            padding: 1.5rem;
        }
        
        .advanced-stat h4 {
            color: var(--primary-color);
            margin-bottom: 0.5rem;
        }
        
        .advanced-stat p {
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 0;
        }
        
        /* Authority Guide Styles */
        .authority-guide {
            margin-top: 1.5rem;
        }
 
        .guide-header {
            display: flex;
            align-items: center;
            margin-bottom: 1.5rem;
            padding-bottom: 1rem;
            border-bottom: 1px solid var(--border-color);
        }
        
        .guide-icon {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background-color: rgba(44, 125, 160, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 1.5rem;
            color: var(--primary-color);
            font-size: 1.5rem;
        }
        
        .guide-title {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 0.5rem;
        }
        
        .guide-subtitle {
            color: var(--text-muted);
            font-size: 1rem;
        }
        
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
        }
        
        .comparison-table th, .comparison-table td {
            padding: 1rem;
            text-align: left;
            border: 1px solid var(--border-color);
        }
        
        .comparison-table th {
            background-color: var(--light-gray);
            font-weight: 600;
            width: 25%;
        }
        
        .comparison-table tr:nth-child(even) {
            background-color: rgba(44, 125, 160, 0.05);
        }
        
        .tip-box {
            background-color: rgba(255, 193, 7, 0.1);
            border-left: 4px solid #ffc107;
            padding: 1rem;
            margin: 1.5rem 0;
            border-radius: 0 4px 4px 0;
        }
        
        .success-box {
            background-color: rgba(40, 167, 69, 0.1);
            border-left: 4px solid #28a745;
            padding: 1rem;
            margin: 1.5rem 0;
            border-radius: 0 4px 4px 0;
        }
        
        .strategy-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 1.5rem;
            margin: 1.5rem 0;
        }
        
        .strategy-card {
            background-color: white;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 1.5rem;
            transition: all 0.3s;
        }
        
        .strategy-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        
        .strategy-card h4 {
            color: var(--primary-color);
            margin-bottom: 0.5rem;
        }
        
        .strategy-card p {
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        
        /* Engagement Chart Styles */
        .engagement-chart {
            width: 100%;
            height: 250px;
            background-color: #f8f9fa;
            border-radius: 8px;
            margin: 1.5rem 0;
            padding: 10px;
            border: 1px solid var(--border-color);
            position: relative;
            display: none; /* 初始隐藏 */
        }
        
        .chart-container {
            display: flex;
            align-items: flex-end;
            justify-content: space-around;
            height: 100%;
            padding: 0 20px;
        }
        
        .chart-bar-container {
            display: flex;
            flex-direction: column;
            align-items: center;
            height: 100%;
            width: 20%;
        }
        
        .chart-bar {
            width: 40px;
            background-color: var(--primary-color);
            border-radius: 4px 4px 0 0;
            transition: height 0.5s ease;
        }
        
        .chart-label {
            margin-top: 10px;
            text-align: center;
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        
        .chart-indicator {
            position: absolute;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: var(--danger-color);
        }
        
        .chart-indicator-label {
            position: absolute;
            left: 0;
            width: 100%;
            text-align: center;
            font-size: 0.9rem;
            color: var(--danger-color);
            font-weight: 600;
        }
        
        .chart-title {
            position: absolute;
            top: -25px;
            width: 100%;
            text-align: center;
            font-weight: 600;
            color: var(--primary-color);
        }
        
        /* Responsive Adjustments */
        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .authority-guide{overflow-x:auto}
            .text-input {
                min-height: 200px;
            }
            
            .advanced-stats {
                grid-template-columns: 1fr;
            }
        }