/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

/* 导航栏 */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    padding: 1rem 2rem;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.8rem;
    font-weight: bold;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: #555;
    font-weight: 500;
    transition: all 0.3s ease;
    padding: 0.5rem 1rem;
    border-radius: 25px;
}

.nav-links a:hover,
.nav-links a.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

/* 主要内容区 */
.main-content {
    padding-top: 100px;
    min-height: calc(100vh - 80px);
}

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

/* 英雄区 */
.hero {
    text-align: center;
    padding: 4rem 2rem;
    color: white;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.hero p {
    font-size: 1.3rem;
    opacity: 0.9;
    max-width: 700px;
    margin: 0 auto 2rem;
}

.hero-btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: white;
    color: #667eea;
    text-decoration: none;
    border-radius: 50px;
    font-weight: bold;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.hero-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

/* 卡片网格 */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    padding: 2rem 0;
}

.card {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #333;
}

.card p {
    color: #666;
    margin-bottom: 1.5rem;
}

.card-link {
    display: inline-block;
    color: #667eea;
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.card-link:hover {
    color: #764ba2;
}

/* 内容页样式 */
.page-header {
    background: white;
    border-radius: 20px;
    padding: 3rem;
    margin-bottom: 2rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.page-header h1 {
    font-size: 2.5rem;
    color: #333;
    margin-bottom: 1rem;
}

.page-header p {
    color: #666;
    font-size: 1.1rem;
}

.content-section {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.content-section h2 {
    font-size: 1.8rem;
    color: #333;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 3px solid #667eea;
}

.content-section h3 {
    font-size: 1.3rem;
    color: #444;
    margin: 1.5rem 0 1rem;
}

.content-section p {
    color: #555;
    margin-bottom: 1rem;
}

.content-section ul, .content-section ol {
    margin-left: 2rem;
    margin-bottom: 1rem;
    color: #555;
}

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

/* 代码块样式 */
.code-block {
    background: #2d2d2d;
    color: #f8f8f2;
    padding: 1.5rem;
    border-radius: 10px;
    overflow-x: auto;
    margin: 1rem 0;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.95rem;
    line-height: 1.5;
}

.code-block .keyword {
    color: #66d9ef;
}

.code-block .string {
    color: #a6e22e;
}

.code-block .comment {
    color: #75715e;
}

/* 信息框 */
.info-box {
    background: linear-gradient(135deg, #e0e7ff 0%, #ede9fe 100%);
    border-left: 4px solid #667eea;
    padding: 1.5rem;
    border-radius: 0 10px 10px 0;
    margin: 1.5rem 0;
}

.info-box h4 {
    color: #667eea;
    margin-bottom: 0.5rem;
}

/* 提示框 */
.tip-box {
    background: linear-gradient(135deg, #dcfce7 0%, #d1fae5 100%);
    border-left: 4px solid #10b981;
    padding: 1.5rem;
    border-radius: 0 10px 10px 0;
    margin: 1.5rem 0;
}

.tip-box h4 {
    color: #10b981;
    margin-bottom: 0.5rem;
}

/* 页脚 */
.footer {
    background: rgba(0, 0, 0, 0.8);
    color: white;
    text-align: center;
    padding: 1.5rem;
    margin-top: 2rem;
}

.footer a {
    color: #a5b4fc;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer a:hover {
    color: #c4b5fd;
    text-decoration: underline;
}

/* 资源列表 */
.resource-list {
    list-style: none;
    margin: 0;
}

.resource-list li {
    background: #f8fafc;
    padding: 1rem 1.5rem;
    margin-bottom: 1rem;
    border-radius: 10px;
    border-left: 4px solid #667eea;
    transition: all 0.3s ease;
}

.resource-list li:hover {
    background: #f1f5f9;
    transform: translateX(5px);
}

.resource-list a {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
}

.resource-list a:hover {
    color: #764ba2;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar {
        padding: 1rem;
    }

    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.5rem;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .card-grid {
        grid-template-columns: 1fr;
    }

    .page-header h1 {
        font-size: 1.8rem;
    }
}