/* DrugBank风格优化 - 参考 https://go.drugbank.com/ */

/* 全局字体设置 */
:root {
    --primary-color: #2c5aa0;
    --secondary-color: #4a90e2;
    --accent-color: #f39c12;
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --text-muted: #95a5a6;
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-accent: #ecf0f1;
    --border-color: #e9ecef;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
}

/* 基础字体设置 */
body {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* DrugBank风格的大标题 */
.hero-title {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', sans-serif;
    font-size: clamp(2.5rem, 4.5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', sans-serif;
    font-size: clamp(1.1rem, 2vw, 1.3rem);
    font-weight: 400;
    line-height: 1.5;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* 搜索框DrugBank风格 */
.search-container {
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 0.75rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    max-width: 600px;
    margin: 0 auto;
}

.search-container:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(44, 90, 160, 0.15);
}

.search-input {
    border: none;
    outline: none;
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-primary);
    background: transparent;
    width: 100%;
    padding: 0.5rem;
}

.search-input::placeholder {
    color: var(--text-muted);
    font-weight: 400;
}

.search-button {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.search-button:hover {
    background: #1e4a7a;
    transform: translateY(-1px);
}

/* 主要内容区域标题 */
.content-title {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', sans-serif;
    font-size: clamp(2rem, 3.5vw, 2.5rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    line-height: 1.3;
}

.content-subtitle {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', sans-serif;
    font-size: clamp(1rem, 1.8vw, 1.2rem);
    font-weight: 400;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 2rem;
}

/* 功能卡片标题 */
.feature-title {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', sans-serif;
    font-size: clamp(1.3rem, 2.2vw, 1.5rem);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    line-height: 1.4;
}

.feature-description {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', sans-serif;
    font-size: clamp(0.95rem, 1.6vw, 1.1rem);
    font-weight: 400;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 新闻和化学产品区域 */
.news-title, .chemical-title {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', sans-serif;
    font-size: clamp(1.4rem, 2.4vw, 1.6rem);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.news-item-title, .chemical-item-title {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', sans-serif;
    font-size: clamp(1rem, 1.6vw, 1.1rem);
    font-weight: 500;
    color: var(--text-primary);
    line-height: 1.4;
    margin-bottom: 0.5rem;
}

.news-item-description, .chemical-item-description {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', sans-serif;
    font-size: clamp(0.9rem, 1.4vw, 1rem);
    font-weight: 400;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* 价格表格 */
.price-table th {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.price-table td {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', sans-serif;
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--text-primary);
}

/* 服务区域 */
.service-title {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', sans-serif;
    font-size: clamp(1.8rem, 3vw, 2.2rem);
    font-weight: 700;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: 1rem;
}

.service-subtitle {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', sans-serif;
    font-size: clamp(1rem, 1.8vw, 1.2rem);
    font-weight: 400;
    color: var(--text-secondary);
    text-align: center;
    line-height: 1.6;
    margin-bottom: 2rem;
}

.service-item-title {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', sans-serif;
    font-size: clamp(1.2rem, 2vw, 1.4rem);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.service-item-description {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', sans-serif;
    font-size: clamp(0.95rem, 1.6vw, 1.1rem);
    font-weight: 400;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 按钮样式 */
.btn-primary {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.btn-primary:hover {
    background: #1e4a7a;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(44, 90, 160, 0.2);
}

/* 链接样式 */
a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: #1e4a7a;
    text-decoration: underline;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .content-title {
        font-size: 1.8rem;
    }
    
    .content-subtitle {
        font-size: 1rem;
    }
    
    .service-title {
        font-size: 1.8rem;
    }
    
    .service-subtitle {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.8rem;
    }
    
    .content-title {
        font-size: 1.6rem;
    }
    
    .service-title {
        font-size: 1.6rem;
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* 卡片样式 */
.card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

/* 高亮文本 */
.highlight {
    color: var(--primary-color);
    font-weight: 600;
}

/* 强调文本 */
.emphasis {
    color: var(--accent-color);
    font-weight: 600;
}