/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #ffffff;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 40px 20px;
}

/* 头部样式 */
.header {
    text-align: center;
    margin-bottom: 50px;
    padding-bottom: 30px;
    border-bottom: 1px solid #eee;
}

.main-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 10px;
    letter-spacing: -1px;
}

.subtitle {
    font-size: 1.8rem;
    font-weight: 400;
    color: #5d6d7e;
    margin-bottom: 30px;
    line-height: 1.4;
}

.paper-links {
    margin-bottom: 30px;
}

.link-button {
    display: inline-block;
    padding: 10px 20px;
    margin: 0 10px;
    background-color: #3498db;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 500;
    transition: background-color 0.3s ease;
}

.link-button:hover {
    background-color: #2980b9;
}

.authors {
    font-size: 1.1rem;
    color: #34495e;
    line-height: 1.8;
}

.authors p {
    margin-bottom: 8px;
}

.affiliations {
    font-size: 1rem;
    color: #7f8c8d;
    font-style: italic;
}

sup {
    font-size: 0.8em;
    color: #e74c3c;
}

/* 摘要部分 */
.abstract-section {
    background-color: #f8f9fa;
    padding: 30px;
    border-radius: 10px;
    margin-bottom: 30px;
    border-left: 4px solid #3498db;
}

.abstract-section h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: #2c3e50;
    font-weight: 600;
}

.abstract-text {
    font-size: 1.1rem;
    line-height: 1.7;
    color: #34495e;
    text-align: justify;
}

/* 免责声明 */
.disclaimer {
    background-color: #fff3cd;
    border: 1px solid #ffeaa7;
    border-radius: 8px;
    padding: 15px;
    margin-bottom: 40px;
    text-align: center;
}

.disclaimer p {
    color: #856404;
    font-size: 1rem;
    margin: 0;
}

/* 音频样本部分 */
.audio-samples {
    margin-bottom: 50px;
}

.audio-samples h3 {
    font-size: 2rem;
    margin-bottom: 30px;
    color: #2c3e50;
    font-weight: 600;
    text-align: center;
}

.sample-section {
    margin-bottom: 40px;
}

.sample-section h4 {
    font-size: 1.5rem;
    margin-bottom: 25px;
    color: #34495e;
    font-weight: 600;
    border-bottom: 2px solid #ecf0f1;
    padding-bottom: 10px;
}

.condition-group {
    margin-bottom: 35px;
}

.condition-group h5 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: #2c3e50;
    font-weight: 500;
}

.sample-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.sample-card {
    background: #ffffff;
    border: 1px solid #e1e8ed;
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.sample-card:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.sample-card h5 {
    font-size: 1.1rem;
    margin-bottom: 15px;
    color: #2c3e50;
    font-weight: 600;
    text-align: center;
}

.sample-card h6 {
    font-size: 1rem;
    margin-bottom: 12px;
    color: #34495e;
    font-weight: 500;
    text-align: center;
}

.sample-card audio {
    width: 100%;
    height: 40px;
    border-radius: 8px;
    outline: none;
}

.sample-card audio::-webkit-media-controls-panel {
    background-color: #f8f9fa;
}

/* 页脚 */
.footer {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #eee;
    color: #7f8c8d;
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 20px 15px;
    }
    
    .main-title {
        font-size: 2.5rem;
    }
    
    .subtitle {
        font-size: 1.4rem;
    }
    
    .sample-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .abstract-section {
        padding: 20px;
    }
    
    .link-button {
        margin: 5px;
        padding: 8px 16px;
    }
}

@media (max-width: 480px) {
    .main-title {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1.2rem;
    }
    
    .authors {
        font-size: 1rem;
    }
}