/* 基础样式 */
body {
    font-family: 'Open Sans', sans-serif;
    margin: 0;
    padding: 0;
    background: linear-gradient(135deg, #f5f7fa, #c3cfe2);
    color: #333;
    line-height: 1.6;
    overflow-x: hidden;
}
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
}
h1, h2, h3, h4, h5, h6 {
    color: #2c3e50;
    text-align: center;
    margin-bottom: 15px;
}
p, li, a {
    font-size: 1rem;
    color: #555;
}
a {
    text-decoration: none;
    transition: color 0.3s ease-in-out;
}
a:hover {
    color: #3498db;
}
img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

/* 标题和导航栏 */
header {
    background: linear-gradient(90deg, #6dd5ed, #2193b0);
    color: #fff;
    padding: 20px 0;
    width: 100%;
    position: relative;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}
header h1 {
    font-size: 2rem;
    margin: 0;
}
.nav-tabs {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 15px;
}
.nav-tabs .tab {
    padding: 10px 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
}
.nav-tabs .tab.active-tab {
    background: linear-gradient(90deg, #ff7e5f, #feb47b);
    color: #fff;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}
.nav-tabs .tab:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* 卡片布局 */
.card-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin: 30px 0;
    width: 100%;
}
.card {
    background: #fff;
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.2);
}
.card img {
    margin-bottom: 15px;
}
.card h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: #2c3e50;
}
.card p {
    font-size: 0.9rem;
    color: #666;
}

/* 文章样式 */
article {
    background: #fff;
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin: 30px 0;
    max-width: 1200px;
    width: 100%;
}
article h2 {
    font-size: 1.8rem;
    margin-bottom: 20px;
}
article p, article li {
    line-height: 1.8;
    margin-bottom: 15px;
}
article pre {
    background: #f4f4f4;
    padding: 15px;
    border-radius: 8px;
    overflow-x: auto;
    font-size: 0.9rem;
    color: #333;
}

/* 响应式设计 */
@media (max-width: 768px) {
    header h1 {
        font-size: 1.5rem;
    }
    .nav-tabs {
        flex-direction: column;
        gap: 10px;
    }
    .card-container {
        grid-template-columns: 1fr;
    }
    article {
        padding: 15px;
    }
}
@media (max-width: 480px) {
    body {
        padding: 10px;
    }
    .container {
        padding: 10px;
    }
    header h1 {
        font-size: 1.2rem;
    }
    .nav-tabs .tab {
        padding: 8px 15px;
        font-size: 0.9rem;
    }
}