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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

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

/* 导航栏样式 */
.navbar {
    background-color: #2c3e50;
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    margin-left: 1.5rem;
}

.nav-links a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background-color 0.3s;
}

.nav-links a:hover,
.nav-links a.active {
    background-color: #3498db;
}

/* 首页英雄区域 */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 5rem 0;
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border-radius: 4px;
    text-decoration: none;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

.btn-primary {
    background-color: #3498db;
    color: white;
}

.btn-primary:hover {
    background-color: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
}

.btn.disabled {
    background-color: #bdc3c7;
    cursor: not-allowed;
}

.btn.disabled:hover {
    background-color: #bdc3c7;
    transform: none;
    box-shadow: none;
}

/* 特性卡片 */
.features {
    padding: 4rem 0;
    background-color: white;
}

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

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    text-align: center;
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-card h3 {
    color: #2c3e50;
    margin-bottom: 1rem;
}

.feature-card p {
    color: #7f8c8d;
    margin-bottom: 1rem;
}

/* 页面头部 */
.page-header {
    text-align: center;
    padding: 3rem 0;
    margin-bottom: 2rem;
}

.page-header h1 {
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 1rem;
}

.page-header p {
    font-size: 1.2rem;
    color: #7f8c8d;
    max-width: 800px;
    margin: 0 auto;
}

/* 内容区域 */
.content-section {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
}

.content-section h2 {
    color: #2c3e50;
    margin: 2rem 0 1rem 0;
}

.content-section ul {
    padding-left: 1.5rem;
    margin: 1rem 0;
}

.content-section li {
    margin-bottom: 0.5rem;
}

/* 模式分类 */
.category {
    margin-bottom: 3rem;
}

.category h2 {
    color: #2c3e50;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #3498db;
}

.pattern-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.pattern-card {
    background: #f8f9fa;
    border: 1px solid #e9ecef;
    border-radius: 8px;
    padding: 1.5rem;
    transition: all 0.3s ease;
}

.pattern-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.pattern-card h3 {
    color: #2c3e50;
    margin-bottom: 0.5rem;
}

.pattern-card p {
    color: #7f8c8d;
    margin-bottom: 1rem;
}

/* 代码示例 */
.code-example {
    margin: 2rem 0;
}

.code-example h3 {
    color: #2c3e50;
    margin-bottom: 1rem;
}

pre {
    background-color: #2c3e50;
    color: #ecf0f1;
    padding: 1.5rem;
    border-radius: 4px;
    overflow-x: auto;
    margin-bottom: 1rem;
}

/* 优缺点对比 */
.pros-cons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.pros-cons h3 {
    margin-bottom: 1rem;
}

.pros {
    background-color: #e8f5e9;
    padding: 1.5rem;
    border-radius: 4px;
}

.cons {
    background-color: #ffebee;
    padding: 1.5rem;
    border-radius: 4px;
}

/* 图表容器 */
.diagram-container {
    background: white;
    padding: 1.5rem;
    border-radius: 4px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    margin: 2rem 0;
    overflow-x: auto;
}

/* 算法详情页面通用样式 */
.algorithm-detail {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 1.5rem;
    margin: 1rem 0;
}

.complexity {
    display: flex;
    gap: 1rem;
    margin: 1rem 0;
}

.complexity-item {
    background: rgba(45, 126, 231, 0.1);
    border: 1px solid rgba(45, 126, 231, 0.3);
    border-radius: 4px;
    padding: 1rem;
    text-align: center;
    flex: 1;
}

.complexity-value {
    font-size: 1.2rem;
    font-weight: bold;
    color: #2d7ee7;
    margin-top: 0.5rem;
}

.visualization {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 1.5rem;
    margin: 1rem 0;
    text-align: center;
}

.btn {
    display: inline-block;
    background: linear-gradient(135deg, #2d7ee7, #4fd1c5);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(45, 126, 231, 0.4);
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
}

table, th, td {
    border: 1px solid rgba(255, 255, 255, 0.1);
}

th, td {
    padding: 0.5rem;
    text-align: center;
}

th {
    background: rgba(45, 126, 231, 0.1);
}

pre {
    background: #1a202c;
    border-radius: 4px;
    padding: 1rem;
    overflow-x: auto;
    margin: 1rem 0;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar .container {
        flex-direction: column;
    }
    
    .nav-links {
        margin-top: 1rem;
    }
    
    .nav-links li {
        margin: 0 0.5rem;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .pattern-grid {
        grid-template-columns: 1fr;
    }
    
    .pros-cons {
        grid-template-columns: 1fr;
    }
}