/* Features页面专用样式 */

/* 基础变量定义 */
:root {
    --primary-color: #4CAF50;
    --primary-dark: #388E3C;
    --primary-light: #81C784;
    --secondary-color: #2196F3;
    --accent-color: #FF9800;
    --success-color: #4CAF50;
    --warning-color: #FF9800;
    --error-color: #F44336;
    
    /* 功能图标专用颜色 */
    --blood-pressure-color: #E74C3C;
    --heart-failure-color: #9B59B6;
    --ai-assistant-color: #3498DB;
    --sleep-color: #34495E;
    --stress-color: #F39C12;
    --health-analytics-color: #27AE60;
    --comprehensive-health-color: #1ABC9C;
    
    /* 中性色 */
    --white: #FFFFFF;
    --black: #000000;
    --gray-50: #FAFAFA;
    --gray-100: #F5F5F5;
    --gray-200: #EEEEEE;
    --gray-300: #E0E0E0;
    --gray-400: #BDBDBD;
    --gray-500: #9E9E9E;
    --gray-600: #757575;
    --gray-700: #616161;
    --gray-800: #424242;
    --gray-900: #212121;
    
    /* 字体 */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* 间距 */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* 过渡 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* 面包屑导航样式 */
.breadcrumb {
    padding: var(--spacing-lg) 0;
    background: var(--gray-50);
    border-bottom: 1px solid var(--gray-200);
}

.breadcrumb-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.breadcrumb-list {
    display: flex;
    list-style: none;
    gap: var(--spacing-sm);
    align-items: center;
}

.breadcrumb-item {
    color: var(--gray-600);
}

.breadcrumb-item:not(:last-child)::after {
    content: '>';
    margin-left: var(--spacing-sm);
    color: var(--gray-400);
}

.breadcrumb-link {
    color: var(--gray-600);
    text-decoration: none;
    transition: var(--transition-fast);
}

.breadcrumb-link:hover {
    color: var(--primary-color);
}

.breadcrumb-current {
    color: var(--primary-color);
    font-weight: 600;
}

/* 功能英雄区域 */
/* Features页面专用hero样式 */
.hero.feature-hero {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.hero.feature-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('../images/hero-bg.svg') center/cover;
    opacity: 0.1;
}

.feature-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.hero-text {
    flex: 1;
}

.hero.feature-hero .hero-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    line-height: 1.2;
}

.hero.feature-hero .hero-description {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
    opacity: 0.9;
}

.hero.feature-hero .hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-normal);
    border: none;
    cursor: pointer;
}

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

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

.btn-secondary {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--white);
}

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

.btn-icon {
    width: 20px;
    height: 20px;
    margin-right: var(--spacing-sm);
}

.hero-image {
    flex: 1;
    text-align: center;
}

.app-preview {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

/* 功能详情区域 */
.feature-details {
    padding: var(--spacing-3xl) 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.feature-section {
    margin-bottom: var(--spacing-3xl);
}

.feature-section h2 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-lg);
}

.feature-section h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: var(--spacing-md);
}

.feature-section p {
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

/* 功能网格 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.feature-card {
    background: var(--white);
    border-radius: 12px;
    padding: var(--spacing-xl);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    width: 60px;
    height: 60px;
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: var(--primary-color);
    color: var(--white);
    font-size: var(--font-size-2xl);
    transition: var(--transition-normal);
}

/* Features页面功能图标专用背景色 */
.feature-card:nth-child(1) .feature-icon {
    background: var(--blood-pressure-color);
}

.feature-card:nth-child(2) .feature-icon {
    background: var(--heart-failure-color);
}

.feature-card:nth-child(3) .feature-icon {
    background: var(--ai-assistant-color);
}

.feature-card:nth-child(4) .feature-icon {
    background: var(--sleep-color);
}

.feature-card:nth-child(5) .feature-icon {
    background: var(--stress-color);
}

.feature-card:nth-child(6) .feature-icon {
    background: var(--health-analytics-color);
}

.feature-card:nth-child(7) .feature-icon {
    background: var(--comprehensive-health-color);
}

/* 具体页面图标颜色 */
.page-blood-pressure .feature-icon {
    background: var(--blood-pressure-color) !important;
}

.page-heart-failure .feature-icon {
    background: var(--heart-failure-color) !important;
}

.page-ai-assistant .feature-icon {
    background: var(--ai-assistant-color) !important;
}

.page-sleep-analysis .feature-icon {
    background: var(--sleep-color) !important;
}

.page-stress-management .feature-icon {
    background: var(--stress-color) !important;
}

.page-health-analytics .feature-icon {
    background: var(--health-analytics-color) !important;
}

.page-comprehensive-health .feature-icon {
    background: var(--comprehensive-health-color) !important;
}

/* Features页面图标悬停效果 */
.feature-card:hover .feature-icon {
    transform: scale(1.1);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

.feature-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.feature-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--spacing-md);
}

.feature-description {
    color: var(--gray-600);
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
}

.feature-list {
    list-style: none;
    margin-bottom: var(--spacing-lg);
}

.feature-list li {
    padding: var(--spacing-sm) 0;
    color: var(--gray-700);
    position: relative;
    padding-left: var(--spacing-lg);
}

.feature-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

/* 综合健康管理页面特殊样式 */
.comprehensive-hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.health-overview {
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a24 100%);
    color: white;
}

.mental-health {
    background: linear-gradient(135deg, #a8e6cf 0%, #88d8c0 100%);
    color: #2c3e50;
}

.physical-health {
    background: linear-gradient(135deg, #ffd93d 0%, #ff6b6b 100%);
    color: #2c3e50;
}

.health-report {
    background: linear-gradient(135deg, #74b9ff 0%, #0984e3 100%);
    color: white;
}

.multilingual {
    background: linear-gradient(135deg, #fd79a8 0%, #e84393 100%);
    color: white;
}

.metabolism {
    background: linear-gradient(135deg, #00b894 0%, #00a085 100%);
    color: white;
}

.blood-pressure {
    background: linear-gradient(135deg, #fdcb6e 0%, #e17055 100%);
    color: #2c3e50;
}

.blood-sugar {
    background: linear-gradient(135deg, #6c5ce7 0%, #a29bfe 100%);
    color: white;
}

/* 算法部分样式 */
.algorithm-section {
    background: #f8f9fa;
    padding: 3rem 0;
    margin: 3rem 0;
}

.algorithm-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.algorithm-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.algorithm-item {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.algorithm-title {
    font-weight: 600;
    color: #333;
    margin-bottom: 0.5rem;
}

.algorithm-description {
    color: #666;
    font-size: 0.9rem;
}

/* 截图展示样式 */
.screenshot-section {
    text-align: center;
    margin: 3rem 0;
}

.screenshot-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.screenshot-item {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.screenshot-item img {
    width: 100%;
    height: auto;
    display: block;
}

.screenshot-caption {
    padding: 1rem;
    color: #333;
    font-weight: 500;
}

/* 研究部分样式 */
.research-section {
    background: #e8f4fd;
    padding: 3rem 0;
    margin: 3rem 0;
}

.research-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.research-item {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.research-title {
    font-weight: 600;
    color: #333;
    margin-bottom: 0.5rem;
}

.research-link {
    color: #007bff;
    text-decoration: none;
}

.research-link:hover {
    text-decoration: underline;
}

/* CTA部分样式 */
.cta-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
    padding: 4rem 0;
}

.cta-button {
    display: inline-block;
    background: white;
    color: #667eea;
    padding: 1rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    margin-top: 2rem;
    transition: transform 0.3s ease;
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .feature-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
    
    .screenshot-grid {
        grid-template-columns: 1fr;
    }
    
    .algorithm-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .hero-title {
        font-size: var(--font-size-2xl);
    }
    
    .feature-card {
        padding: var(--spacing-lg);
    }
}