/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 全局样式 */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 头部样式 */
.header {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    padding: 2rem 0;
    text-align: center;
}

.title {
    font-size: 3rem;
    font-weight: 700;
    color: white;
    margin-bottom: 0.5rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.subtitle {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 300;
}

/* 主要内容 */
.main {
    flex: 1;
    padding: 4rem 0;
}

.hero {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    padding: 3rem;
    margin-bottom: 3rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
}

.hero-content h2 {
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #2d3748;
    text-align: center;
}

.hero-content > p {
    font-size: 1.1rem;
    text-align: center;
    margin-bottom: 3rem;
    color: #4a5568;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.tech-item {
    background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
    padding: 2rem;
    border-radius: 15px;
    border-left: 4px solid #667eea;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.tech-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.tech-item h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 0.8rem;
    color: #2d3748;
}

.tech-item p {
    color: #4a5568;
    line-height: 1.6;
}

.philosophy {
    background: rgba(255, 255, 255, 0.9);
    border-radius: 20px;
    padding: 3rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.philosophy-content h2 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 2rem;
    color: #2d3748;
    text-align: center;
}

.philosophy blockquote {
    font-size: 1.3rem;
    font-style: italic;
    text-align: center;
    margin: 2rem 0;
    padding: 2rem;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border-radius: 15px;
    position: relative;
}

.philosophy blockquote::before {
    content: '"';
    font-size: 4rem;
    position: absolute;
    top: -10px;
    left: 20px;
    opacity: 0.3;
}

.philosophy-content > p {
    font-size: 1.1rem;
    color: #4a5568;
    text-align: center;
    line-height: 1.8;
}

/* 页脚样式 */
.footer {
    background: rgba(0, 0, 0, 0.8);
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: auto;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.footer-content p {
    margin: 0;
    opacity: 0.9;
}

.beian a {
    color: #90cdf4;
    text-decoration: none;
    transition: color 0.3s ease;
}

.beian a:hover {
    color: #63b3ed;
    text-decoration: underline;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .title {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .hero,
    .philosophy {
        padding: 2rem;
        margin-bottom: 2rem;
    }
    
    .hero-content h2 {
        font-size: 2rem;
    }
    
    .tech-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .tech-item {
        padding: 1.5rem;
    }
    
    .philosophy blockquote {
        font-size: 1.1rem;
        padding: 1.5rem;
    }
    
    .container {
        padding: 0 15px;
    }
}

@media (max-width: 480px) {
    .header {
        padding: 1.5rem 0;
    }
    
    .title {
        font-size: 1.8rem;
    }
    
    .main {
        padding: 2rem 0;
    }
    
    .hero,
    .philosophy {
        padding: 1.5rem;
    }
    
    .hero-content h2 {
        font-size: 1.8rem;
    }
}