:root {
    --primary-color: #4a6eb5;
    --primary-dark: #3a5c9a;
    --secondary-color: #8ca3d8;
    --text-color: #333;
    --light-text: #666;
    --border-color: #eaeaea;
    --background-color: #f5f5f5;
    --white: #fff;
    --highlight: #ffffcc;
    --error-color: #d9534f;
    --success-color: #5cb85c;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Microsoft YaHei', '微软雅黑', Arial, sans-serif;
}

body {
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    padding-bottom: 2rem;
}

.container {
    width: 90%;
    max-width: 1000px;
    margin: 2rem auto;
    padding: 2rem;
    background-color: var(--white);
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
}

header {
    text-align: center;
    margin-bottom: 2rem;
}

h1 {
    color: var(--text-color);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 1rem;
}

.subtitle {
    margin-top: 0.5rem;
    color: var(--light-text);
    font-style: italic;
}

h2 {
    color: var(--primary-color);
    margin: 1.5rem 0 1rem;
}

h3 {
    color: var(--text-color);
    margin: 1rem 0;
}

.input-section {
    margin-bottom: 2rem;
}

.textarea-container {
    position: relative;
    margin-bottom: 1rem;
}

textarea {
    padding-bottom: 35px; /* 为计数器腾出空间 */
    font-size: 1.2rem;
    line-height: 1.5;
    width: 100%;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    resize: none;
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1);
    transition: border-color 0.3s;
    min-height: 250px;
}

textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 5px rgba(74, 110, 181, 0.3);
}

.char-counter {
    position: absolute;
    bottom: 8px;
    right: 10px;
    font-size: 0.9rem;
    color: #888;
    background-color: rgba(255, 255, 255, 0.9);
    padding: 3px 8px;
    border-radius: 3px;
    border: 1px solid #ddd;
}

.char-counter.exceeded {
    color: #e74c3c;
    font-weight: bold;
    background-color: #f8d7da;
    border-color: #f5c6cb;
}

.button-group {
    display: flex;
    gap: 10px;
    margin-top: 1rem;
}

button {
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s, transform 0.1s;
}

button:hover {
    transform: translateY(-2px);
}

button:active {
    transform: translateY(0);
}

.primary-btn {
    background-color: var(--primary-color);
    color: white;
    flex-grow: 2;
}

.primary-btn:hover {
    background-color: var(--primary-dark);
}

.secondary-btn {
    background-color: var(--white);
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.secondary-btn:hover {
    background-color: var(--background-color);
}

.results-section {
    margin-top: 2rem;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    animation: fadeIn 0.5s;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.result-box {
    margin-bottom: 4rem;
    background-color: #f9f9f9;
    border-radius: 4px;
    overflow: visible;
}

.result-header {
    background-color: var(--secondary-color);
    color: var(--white);
    padding: 0.7rem 1rem;
}

.result-header h3 {
    margin: 0;
    color: var(--white);
}

.result-box > p, .result-box > div {
    padding: 1rem;
}

.highlight-text {
    background-color: var(--highlight);
    padding: 3px 6px;
    border-radius: 3px;
    font-weight: bold;
}

.chart-container {
    margin: 2rem 0;
    background-color: #f9f9f9;
    border-radius: 4px;
    overflow: hidden;
}

.chart-container img {
    padding: 1rem;
    display: block;
    margin: 0 auto;
}

.explanation {
    margin-top: 2rem;
    background-color: #f9f9f9;
    border-radius: 4px;
    overflow: hidden;
}

.tabs {
    width: 100%;
}

.tab-header {
    display: flex;
    background-color: var(--border-color);
    border-bottom: 1px solid #ddd;
}

.tab-btn {
    background: none;
    border: none;
    padding: 0.8rem 1rem;
    cursor: pointer;
    transition: background-color 0.3s;
    font-weight: bold;
    border-bottom: 2px solid transparent;
    flex-grow: 1;
    text-align: center;
}

.tab-btn:hover {
    background-color: rgba(0, 0, 0, 0.05);
    transform: none;
}

.tab-btn.active {
    color: var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
}

.tab-content {
    padding: 1rem;
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
    animation: fadeIn 0.3s;
}

/* 新的特征组样式 */
.feature-section {
    margin-bottom: 2rem;
    background-color: white;
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: transform 0.2s, box-shadow 0.2s;
}

.feature-section:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.section-header {
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #e9ecef;
}

.section-header h4 {
    margin-bottom: 0.5rem;
    font-size: 1.3rem;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.section-icon {
    font-size: 1.5rem;
}

.section-description {
    color: #6c757d;
    font-size: 0.9rem;
    font-style: italic;
    margin: 0;
    line-height: 1.4;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.feature-item {
    background-color: #f8f9fa;
    border-radius: 6px;
    padding: 1rem;
    transition: all 0.2s;
    border: 1px solid transparent;
}

.feature-item:hover {
    background-color: #e9ecef;
    transform: translateY(-1px);
}

.feature-item.feature-high {
    background-color: #d4edda;
    border-color: #c3e6cb;
}

.feature-item.feature-low {
    background-color: #f8d7da;
    border-color: #f5c6cb;
}

.feature-item.feature-normal {
    background-color: #fff3cd;
    border-color: #ffeaa7;
}

.feature-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.feature-name {
    font-weight: 600;
    color: #495057;
    font-size: 0.95rem;
}

.status-icon {
    font-size: 1.1rem;
}

.feature-value {
    font-size: 1.1rem;
    font-weight: bold;
    color: var(--primary-color);
    font-family: 'Courier New', monospace;
}

.loading {
    text-align: center;
    margin: 3rem 0;
}

.spinner {
    border: 4px solid rgba(0, 0, 0, 0.1);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border-left-color: var(--primary-color);
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.error {
    color: var(--error-color);
    padding: 1rem;
    background-color: #f9f2f2;
    border-radius: 4px;
    margin: 1rem 0;
    border-left: 4px solid var(--error-color);
}

footer {
    margin-top: 3rem;
    text-align: center;
    color: var(--light-text);
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
    font-size: 14px;
}

/* 警告容器样式 */
.warnings-container {
    margin-bottom: 1.5rem;
}

.warning-box {
    background-color: #fff3cd;
    border: 1px solid #ffeaa7;
    border-radius: 6px;
    padding: 1rem;
    border-left: 4px solid #f39c12;
}

.warning-header {
    margin-bottom: 0.8rem;
}

.warning-header h3 {
    margin: 0;
    color: #856404;
    font-size: 1.1rem;
}

.warnings-list {
    margin: 0;
}

.warning-item {
    background-color: #fefcf3;
    border: 1px solid #f8d7da;
    border-radius: 4px;
    padding: 0.8rem;
    margin-bottom: 0.8rem;
    border-left: 3px solid #e74c3c;
}

.warning-item:last-child {
    margin-bottom: 0;
}

.warning-message {
    font-weight: 500;
    color: #721c24;
    margin-bottom: 0.5rem;
}

.warning-suggestion {
    font-size: 0.9rem;
    color: #856404;
    font-style: italic;
}

/* 字符计数器样式 */
.textarea-container {
    position: relative;
    margin-bottom: 1rem;
}

.char-counter {
    position: absolute;
    bottom: 8px;
    right: 10px;
    font-size: 0.9rem;
    color: #888;
    background-color: rgba(255, 255, 255, 0.9);
    padding: 3px 8px;
    border-radius: 3px;
    border: 1px solid #ddd;
}

.char-counter.exceeded {
    color: #e74c3c;
    font-weight: bold;
    background-color: #f8d7da;
    border-color: #f5c6cb;
}

/* 错误详情样式 */
.error-details {
    margin-top: 1rem;
}

.error-details h4 {
    color: #721c24;
    margin-bottom: 0.8rem;
    font-size: 1.1rem;
}

.error-details ul {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.error-details li {
    margin-bottom: 0.5rem;
    line-height: 1.5;
}

/* 层次分析样式 */
.level-analysis-section {
    margin-top: 2rem;

}

.level-chart-container {
    text-align: center;
    margin: 1.5rem 0;
    background-color: white;
    padding: 1rem;
    border-radius: 6px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.level-report {
    background-color: white;
    padding: 1.5rem;
    border-radius: 6px;
    margin-top: 1rem;
}

.text-analysis-report {
    background-color: white;
    padding: 1.5rem;
    border-radius: 6px;
}

.level-summary {
    margin-bottom: 1.5rem;
    padding: 1rem;
    background-color: #f8f9fa;
    border-radius: 4px;
    border-left: 4px solid #007bff;
}

.level-summary h4 {
    margin-bottom: 0.5rem;
    color: #495057;
}

.feature-details {
    margin-top: 1rem;
}

.feature-details ul {
    margin-left: 1.5rem;
}

.feature-details li {
    margin-bottom: 0.3rem;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
}

.text-sample {
    background-color: #e9ecef;
    padding: 0.8rem;
    border-radius: 4px;
    margin-bottom: 1rem;
    font-style: italic;
}

/* 层次总结网格样式 */
.level-summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}

.level-summary-item {
    background-color: white;
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid #e9ecef;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    transition: transform 0.2s, box-shadow 0.2s;
}

.level-summary-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.level-summary-item h5 {
    margin-bottom: 1rem;
    color: var(--primary-color);
    font-size: 1.1rem;
    font-weight: bold;
}

.score-display {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    margin-bottom: 1rem;
}

.score-value {
    font-size: 2rem;
    font-weight: bold;
    color: var(--primary-color);
}

.score-grade {
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.9rem;
    font-weight: bold;
    text-transform: uppercase;
}

.grade-very-high {
    background-color: #d4edda;
    color: #155724;
}

.grade-high {
    background-color: #fff3cd;
    color: #856404;
}

.grade-medium {
    background-color: #fde2e4;
    color: #721c24;
}

.grade-low {
    background-color: #f8d7da;
    color: #721c24;
}

.description {
    font-size: 0.9rem;
    color: var(--light-text);
    line-height: 1.4;
    margin-bottom: 0.8rem;
}

.feature-count {
    font-size: 0.8rem;
    color: #6c757d;
    font-style: italic;
}

/* 无数据状态样式 */
.no-data {
    text-align: center;
    color: #888;
    font-style: italic;
    padding: 1rem;
    background-color: #f8f9fa;
    border-radius: 4px;
    border: 1px dashed #dee2e6;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        width: 95%;
        padding: 1rem;
    }
    
    .button-group {
        flex-direction: column;
    }
    
    .tab-header {
        flex-direction: column;
    }
    
    .warning-box {
        padding: 0.8rem;
    }
    
    .warning-item {
        padding: 0.6rem;
    }
    
    .char-counter {
        font-size: 0.8rem;
        padding: 2px 6px;
    }
    
    .level-summary-grid {
        grid-template-columns: 1fr;
    }
    
    .score-display {
        justify-content: center;
        text-align: center;
    }
    
    .level-chart-container {
        padding: 0.5rem;
    }
    
    .level-analysis-section {
        padding: 1rem;
    }
}

@media (max-width: 480px) {
    .feature-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.3rem;
    }
    
    .feature-value {
        font-size: 1rem;
    }
}

/* 增强现有样式 */
.feature-groups {
    max-width: 100%;
    overflow-x: auto;
}

/* 特征组标题的渐变效果 */
.feature-section:nth-child(1) .section-header h4 {
    background: linear-gradient(135deg, #FF6B6B, #ff8e8e);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.feature-section:nth-child(2) .section-header h4 {
    background: linear-gradient(135deg, #4ECDC4, #7ed3d3);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.feature-section:nth-child(3) .section-header h4 {
    background: linear-gradient(135deg, #45B7D1, #78c5d4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.feature-section:nth-child(4) .section-header h4 {
    background: linear-gradient(135deg, #C940E4, #d66ee7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}