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

:root {
    --main-bg-gradient: linear-gradient(135deg, #1a237e, #6200ea);
    --sidebar-bg: #1e1e2d;
    --main-content-bg: #f9fafb;
    --text-color: #ffffff;
    --secondary-text-color: #333333;
    --accent-orange: #ffab40;
    --accent-green: #00c853;
    --font-title: 'Poppins', sans-serif;
    --font-body: 'Roboto', sans-serif;
    --transition-speed: 0.3s;
}

body {
    font-family: var(--font-body);
    background: var(--main-bg-gradient);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 布局 */
.container {
    display: flex;
    flex: 1;
}

/* 侧边栏 */
.sidebar {
    width: 20%;
    background-color: var(--sidebar-bg);
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.sidebar nav {
    width: 100%;
}

.sidebar nav ul {
    list-style: none;
}

.sidebar nav ul li {
    margin: 20px 0;
}

.sidebar nav ul li a {
    color: var(--text-color);
    text-decoration: none;
    font-family: var(--font-title);
    font-size: 1.2em;
    transition: color var(--transition-speed);
}

.sidebar nav ul li a:hover {
    color: var(--accent-green);
}

.logo {
    margin-bottom: 40px;
    font-family: var(--font-title);
    font-size: 1.5em;
    color: var(--accent-orange);
    text-align: center;
}

/* 主要内容 */
.main-content {
    margin-left: 20%;
    padding: 40px;
    background-color: var(--main-content-bg);
    color: var(--secondary-text-color);
    flex: 1;
    animation: fadeIn 1s ease-in-out forwards;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* 文章样式 */
article {
    max-width: 800px;
    margin: 0 auto;
}

article h2 {
    font-family: var(--font-title);
    font-size: 2em;
    margin-bottom: 20px;
    color: #1a237e;
}

article h3 {
    font-family: var(--font-title);
    font-size: 1.5em;
    margin: 20px 0 10px;
    color: #6200ea;
}

article h4 {
    font-family: var(--font-title);
    font-size: 1.2em;
    margin: 15px 0 10px;
    color: #6200ea;
}

article p {
    line-height: 1.6;
    margin-bottom: 15px;
}

article pre {
    background-color: #f4f4f4;
    padding: 15px;
    border-radius: 8px;
    overflow-x: auto;
    margin-bottom: 15px;
}

article code {
    font-family: 'Courier New', Courier, monospace;
    background-color: #e0e0e0;
    padding: 2px 4px;
    border-radius: 4px;
}

.article-section {
    margin-bottom: 40px;
}

/* 示例展示 */
.example-display {
    border: 2px dashed var(--accent-orange);
    padding: 20px;
    border-radius: 8px;
    background-color: #ffffff;
    color: #333333;
    margin: 40px 0;
}

.example-display h2 {
    text-align: center;
    margin-bottom: 20px;
    color: var(--accent-orange);
}

.example-display article {
    color: #333333;
}

.example-display pre {
    background-color: #e8e8e8;
    padding: 10px;
    border-radius: 5px;
}

.example-display code {
    background-color: #d0d0d0;
    padding: 2px 3px;
    border-radius: 3px;
}

/* 图片样式 */
img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 20px 0;
    transition: transform var(--transition-speed);
}

img:hover {
    transform: scale(1.05);
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.module {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease-in-out forwards;
    margin-bottom: 30px;
}

/* 按钮样式 */
.button {
    display: inline-block;
    padding: 10px 20px;
    background-color: var(--accent-orange);
    color: #ffffff;
    text-decoration: none;
    border-radius: 5px;
    transition: background-color var(--transition-speed), transform var(--transition-speed);
}

.button:hover {
    background-color: var(--accent-green);
    transform: scale(1.05);
}

/* 提示 */
.prompt {
    text-align: center;
    padding: 10px;
    background-color: rgba(255, 255, 255, 0.1);
    color: #ffffff;
    position: fixed;
    bottom: 0;
    width: 100%;
    font-size: 1em;
}

/* 响应式设计 */
@media (max-width: 1440px) {
    .main-content {
        padding: 30px;
    }
}

@media (max-width: 1200px) {
    .sidebar {
        width: 15%;
    }

    .main-content {
        margin-left: 15%;
        padding: 25px;
    }
}

@media (max-width: 1024px) {
    .sidebar {
        width: 20%;
    }

    .main-content {
        margin-left: 20%;
        padding: 20px;
    }
}

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

    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        flex-direction: row;
        overflow-x: auto;
    }

    .sidebar nav ul {
        display: flex;
        flex-direction: row;
    }

    .sidebar nav ul li {
        margin: 10px;
    }

    .main-content {
        margin-left: 0;
        padding: 15px;
    }
}

@media (max-width: 480px) {
    .sidebar nav ul li a {
        font-size: 1em;
    }

    article h2 {
        font-size: 1.5em;
    }

    article h3 {
        font-size: 1.2em;
    }

    .button {
        padding: 8px 16px;
    }
}

@media (max-width: 320px) {
    .sidebar nav ul li a {
        font-size: 0.9em;
    }

    article h2 {
        font-size: 1.2em;
    }

    .button {
        padding: 6px 12px;
    }
}

/* 自定义图标 */
.icon {
    width: 40px;
    height: 40px;
    background-color: var(--accent-orange);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    font-size: 18px;
    font-weight: bold;
    transition: background-color var(--transition-speed), transform var(--transition-speed);
}

.icon:hover {
    background-color: var(--accent-green);
    transform: rotate(360deg);
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: var(--accent-orange);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-green);
}