/* 全局样式 */
body {
    background-color: #F0F8FF;
    color: #333333;
    font-family: 'Helvetica Neue', Arial, sans-serif;
    margin: 0;
    padding: 0;
}

/* 头部样式 */
.header {
    background-color: #4169E1;
    color: #E19B41;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
}

.header .logo {
    font-size: 24px;
    font-weight: bold;
}

.nav a {
    color: #FFFFFF;
    margin-left: 20px;
    text-decoration: none;
    font-size: 16px;
    transition: color 0.3s ease;
}

.nav a:hover {
    color: #E19B41;
}

/* 渐变背景 */
.gradient-background {
    background: linear-gradient(to right, #1E90FF, #4169E1, #00BFFF);
    height: 200px;
}

/* 主内容区域 */
.main-content {
    display: flex;
    max-width: 1200px;
    margin: 40px auto;
    padding: 0 20px;
    flex-wrap: wrap;
}

.article {
    flex: 3;
    margin-right: 20px;
    background-color: #FFFFFF;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.article h2 {
    color: #4169E1;
    font-size: 32px;
    font-weight: bold;
    margin-bottom: 20px;
}

.article p {
    color: #333333;
    line-height: 1.6;
    font-size: 18px;
    margin-bottom: 15px;
}

.article h3 {
    color: #4169E1;
    font-size: 24px;
    margin-top: 30px;
    margin-bottom: 15px;
}

.article h4 {
    color: #4169E1;
    font-size: 20px;
    margin-top: 20px;
    margin-bottom: 10px;
}

.article pre {
    background-color: #F5F5F5;
    border-left: 4px solid #4169E1;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    font-size: 16px;
    line-height: 1.5;
    margin-bottom: 20px;
}

.article code {
    color: #E19B41;
}

/* 侧边栏样式 */
.sidebar {
    flex: 1;
    background-color: #00BFFF;
    color: #4169E1;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.sidebar h3 {
    color: #4169E1;
    font-size: 20px;
    margin-bottom: 15px;
}

.sidebar ul {
    list-style: none;
    padding: 0;
}

.sidebar ul li {
    margin-bottom: 10px;
}

.sidebar ul li a {
    color: #E19B41;
    text-decoration: none;
    transition: color 0.3s ease;
}

.sidebar ul li a:hover {
    color: #4169E1;
}

/* 脚部样式 */
.footer {
    background-color: #4169E1;
    color: #FFFFFF;
    text-align: center;
    padding: 20px;
    font-size: 14px;
}

/* 按钮样式 */
.button {
    background-color: #4169E1;
    color: #FFFFFF;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.button:hover {
    background-color: #365bb5;
}

/* 卡片样式 */
.card {
    background-color: #1E90FF;
    border: 1px solid #4169E1;
    color: #FFFFFF;
    padding: 20px;
    margin: 10px 0;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* 分隔线样式 */
.separator {
    border-top: 1px solid #00BFFF;
    margin: 20px 0;
}

/* 颜色预览样式 */
.color-preview {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
}

.color-preview div {
    width: 100px;
    height: 50px;
    border: 1px solid #ccc;
    border-radius: 5px;
    margin-right: 10px;
}

.color-preview span {
    font-size: 16px;
    color: #4169E1;
}

/* 响应式设计 */
@media (max-width: 1440px) {
    .main-content {
        max-width: 1024px;
    }
}

@media (max-width: 1200px) {
    .main-content {
        max-width: 960px;
    }
}

@media (max-width: 1024px) {
    .main-content {
        max-width: 768px;
    }
}

@media (max-width: 768px) {
    .main-content {
        flex-direction: column;
    }

    .article {
        margin-right: 0;
        margin-bottom: 20px;
    }

    .sidebar {
        margin-top: 20px;
    }
}

@media (max-width: 480px) {
    .header {
        flex-direction: column;
        align-items: flex-start;
    }

    .nav {
        margin-top: 10px;
    }

    .nav a {
        margin-left: 0;
        margin-right: 15px;
    }

    .color-preview div {
        width: 80px;
        height: 40px;
    }

    .color-preview span {
        font-size: 14px;
    }

    .article h2 {
        font-size: 28px;
    }

    .article p {
        font-size: 16px;
    }
}

@media (max-width: 320px) {
    .header {
        padding: 10px 20px;
    }

    .nav a {
        font-size: 14px;
        margin-right: 10px;
    }

    .gradient-background {
        height: 150px;
    }

    .footer {
        padding: 15px;
        font-size: 12px;
    }
}

/* 动画效果 */
.nav a,
.sidebar ul li a,
.button {
    transition: color 0.3s ease, background-color 0.3s ease;
}

/* 图表配色 */
.chart-main {
    background-color: #4169E1;
}

.chart-secondary {
    background-color: #00BFFF;
}

.chart-deep {
    background-color: #1E90FF;
}