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

body {
    font-family: 'Open Sans', sans-serif;
    background: linear-gradient(135deg, #3498DB, #2ECC71);
    color: #2C3E50;
    line-height: 1.6;
    padding: 20px;
}

/* 顶部导航栏 */
header {
    background: rgba(44, 62, 80, 0.9);
    color: #FFFFFF;
    padding: 15px 30px;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header .logo {
    font-family: 'Roboto', sans-serif;
    font-size: 24px;
    font-weight: bold;
}

nav ul {
    list-style: none;
    display: flex;
}

nav ul li {
    margin-left: 20px;
}

nav ul li a {
    color: #FFFFFF;
    text-decoration: none;
    font-size: 16px;
    transition: color 0.3s ease;
}

nav ul li a:hover {
    color: #2ECC71;
}

/* 主内容区 */
.container {
    display: flex;
    margin-top: 80px;
    flex-wrap: wrap;
}

.sidebar {
    flex: 1 1 250px;
    background: rgba(236, 240, 241, 0.9);
    padding: 20px;
    margin-right: 20px;
    border-radius: 8px;
    transition: transform 0.3s ease;
}

.sidebar h3 {
    font-family: 'Roboto', sans-serif;
    margin-bottom: 15px;
    color: #2C3E50;
}

.sidebar ul {
    list-style: none;
}

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

.sidebar ul li a {
    color: #3498DB;
    text-decoration: none;
    transition: color 0.3s ease;
}

.sidebar ul li a:hover {
    color: #2ECC71;
}

.main-content {
    flex: 3 1 700px;
    background: rgba(255, 255, 255, 0.9);
    padding: 20px;
    border-radius: 8px;
}

.main-content h1, .main-content h2, .main-content h3 {
    font-family: 'Roboto', sans-serif;
    color: #2C3E50;
}

.main-content p {
    margin-bottom: 15px;
}

.main-content pre {
    background: #ECF0F1;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    margin-bottom: 15px;
}

.main-content code {
    font-family: 'Courier New', Courier, monospace;
    color: #E74C3C;
}

.footer {
    background: rgba(44, 62, 80, 0.9);
    color: #FFFFFF;
    text-align: center;
    padding: 20px;
    margin-top: 40px;
    border-radius: 8px;
}

.footer p {
    margin-bottom: 10px;
}

.footer a {
    color: #2ECC71;
    text-decoration: none;
}

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

/* 卡片式布局 */
.card {
    background: #FFFFFF;
    border: 1px solid #DDDDDD;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 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 10px 15px rgba(0,0,0,0.2);
}

.card img {
    width: 100%;
    height: auto;
    border-radius: 5px;
    margin-bottom: 15px;
}

.card h3 {
    margin-bottom: 10px;
    color: #3498DB;
}

.card p {
    color: #2C3E50;
}

/* 按钮样式 */
.button {
    display: inline-block;
    padding: 10px 20px;
    background: #3498DB;
    color: #FFFFFF;
    text-decoration: none;
    border-radius: 5px;
    transition: background 0.3s ease, transform 0.3s ease;
    position: relative;
    overflow: hidden;
}

.button:hover {
    background: #2ECC71;
    transform: scale(1.05);
}

.button::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100px;
    height: 100px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    transform: translate(-50%, -50%) scale(0);
    transition: transform 0.6s ease-out, opacity 0.6s ease-out;
    opacity: 0;
}

.button:hover::after {
    transform: translate(-50%, -50%) scale(2);
    opacity: 1;
}

/* 响应式设计 */
@media (max-width: 1440px) {
    .container {
        flex-wrap: wrap;
    }
}

@media (max-width: 1200px) {
    .sidebar {
        flex: 1 1 200px;
    }
    .main-content {
        flex: 3 1 600px;
    }
}

@media (max-width: 1024px) {
    .container {
        flex-direction: column;
    }
    .sidebar {
        margin-right: 0;
        margin-bottom: 20px;
    }
}

@media (max-width: 768px) {
    header {
        flex-direction: column;
        align-items: flex-start;
    }
    nav ul {
        flex-direction: column;
        width: 100%;
    }
    nav ul li {
        margin-left: 0;
        margin-bottom: 10px;
    }
}

@media (max-width: 480px) {
    .card {
        padding: 15px;
    }
    .button {
        padding: 8px 16px;
    }
}

@media (max-width: 320px) {
    header {
        padding: 10px 20px;
    }
    .logo {
        font-size: 20px;
    }
    nav ul li a {
        font-size: 14px;
    }
}

/* 动画效果 */
@keyframes aurora-move {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

body {
    background: radial-gradient(circle, rgb(255, 87, 34), transparent);
    animation: aurora-move 15s linear infinite;
}

/* 提示文本样式 */
.reference {
    text-align: center;
    font-size: 18px;
    color: #FFFFFF;
    margin-top: 20px;
}

/* 代码块样式 */
.code-example {
    background: #2C3E50;
    color: #ECF0F1;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    font-family: 'Courier New', Courier, monospace;
    margin-bottom: 20px;
}

.code-example code {
    display: block;
}

/* 图片样式 */
img.decorative {
    width: 100%;
    max-width: 320px;
    height: auto;
    border-radius: 5px;
    margin-bottom: 15px;
}

/* 链接样式 */
a {
    color: #3498DB;
    text-decoration: none;
}

a:hover {
    color: #2ECC71;
    text-decoration: underline;
}

/* 表格样式 */
table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
}

table th, table td {
    border: 1px solid #DDDDDD;
    padding: 10px;
    text-align: left;
}

table th {
    background: #3498DB;
    color: #FFFFFF;
}

table tr:nth-child(even) {
    background: #F9F9F9;
}

/* 分隔线 */
hr {
    border: none;
    border-top: 1px solid #DDDDDD;
    margin: 20px 0;
}

/* 图文并茂布局 */
.media {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.media img {
    width: 150px;
    height: auto;
    border-radius: 8px;
    margin-right: 20px;
}

.media .media-content {
    flex: 1;
}

.media .media-content h4 {
    margin-bottom: 10px;
    color: #2C3E50;
}

.media .media-content p {
    color: #7F8C8D;
}

/* 标签样式 */
.tags {
    margin-top: 20px;
}

.tags span {
    display: inline-block;
    background: #2ECC71;
    color: #FFFFFF;
    padding: 5px 10px;
    border-radius: 15px;
    margin-right: 10px;
    margin-bottom: 10px;
    font-size: 14px;
}