/* 基础重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 全局样式 */
body {
    font-family: 'Roboto', sans-serif;
    color: #ffffff;
    line-height: 1.6;
    letter-spacing: 0.5px;
    background: linear-gradient(135deg, #0F2027, #203A43, #2C5364);
    background-size: cover;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 顶部导航栏 */
header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(20, 20, 20, 0.8);
    padding: 15px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

header .logo {
    font-size: 1.5em;
    font-weight: bold;
    color: #00d2ff;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 20px;
}

nav ul li a {
    text-decoration: none;
    color: #ffffff;
    transition: color 0.3s ease;
}

nav ul li a:hover {
    color: #00b894;
}

/* 侧边悬浮导航 */
.sidebar {
    position: fixed;
    top: 60px;
    left: 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.sidebar a {
    text-decoration: none;
    color: #ffffff;
    font-size: 1.2em;
    transition: color 0.3s ease;
}

.sidebar a:hover {
    color: #FF9800;
}

/* 主内容区 */
.main-content {
    margin-top: 80px;
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.article {
    background: rgba(255, 255, 255, 0.1);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 8px 16px rgba(0,0,0,0.2);
    backdrop-filter: blur(10px);
}

.article h2, .article h3 {
    color: #00d2ff;
    margin-bottom: 20px;
}

.article p {
    margin-bottom: 15px;
    color: #ffffff;
}

.article pre {
    background: rgba(0, 0, 0, 0.6);
    padding: 15px;
    border-radius: 5px;
    overflow: auto;
    margin-bottom: 15px;
}

.article code {
    color: #FFD700;
    font-family: 'Courier New', Courier, monospace;
}

.article img {
    width: 100%;
    max-width: 320px;
    height: auto;
    border-radius: 10px;
    margin-bottom: 15px;
}

.article .code-preview {
    background: linear-gradient(135deg, #4CAF50, #FF9800);
    padding: 10px;
    border-radius: 5px;
    color: #ffffff;
    font-family: 'Courier New', Courier, monospace;
    margin-bottom: 15px;
}

/* 页脚 */
footer {
    background: rgba(20, 20, 20, 0.8);
    padding: 20px 30px;
    text-align: center;
    color: #ffffff;
    backdrop-filter: blur(10px);
}

/* 提示信息 */
.reference-note {
    text-align: center;
    font-size: 1.2em;
    color: #FF9800;
    margin-bottom: 20px;
}

/* 按钮样式 */
.button {
    background: linear-gradient(135deg, #00b894, #00d2ff);
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    transition: background 0.3s ease;
    cursor: pointer;
}

.button:hover {
    background: linear-gradient(135deg, #ff7675, #fd79a8);
}

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

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

/* 网格卡片布局 */
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
}

.card {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, background 0.3s ease;
}

.card:hover {
    transform: translateY(-10px);
    background: linear-gradient(135deg, #4CAF50, #FF9800);
}

/* 响应式设计 */

/* 小尺寸手机 */
@media (max-width: 320px) {
    header {
        padding: 10px 20px;
    }

    nav ul {
        display: none;
    }

    .sidebar {
        left: 10px;
    }
}

/* 大尺寸手机 */
@media (max-width: 480px) {
    .main-content {
        padding: 15px;
    }

    .article {
        padding: 20px;
    }

    .sidebar a {
        font-size: 1em;
    }
}

/* 竖屏平板 */
@media (max-width: 768px) {
    .grid-container {
        grid-template-columns: 1fr;
    }

    .card {
        padding: 15px;
    }

    .sidebar {
        flex-direction: row;
        top: auto;
        bottom: 20px;
        left: 50%;
        transform: translateX(-50%);
    }
}

/* 中等屏幕 */
@media (max-width: 1024px) {
    .sidebar {
        display: none;
    }
}

/* 桌面显示器 */
@media (max-width: 1200px) {
    .main-content {
        padding: 25px;
    }
}

/* 大尺寸桌面显示器 */
@media (min-width: 1440px) {
    header {
        padding: 20px 40px;
    }

    nav ul li a {
        font-size: 1.2em;
    }

    .main-content {
        padding: 40px 60px;
    }
}