/* 全局样式 */
body {
    margin: 0;
    padding: 0;
    background: linear-gradient(135deg, #FF9800, #673AB7);
    font-family: 'Roboto', sans-serif;
    color: #fff;
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* 头部样式 */
header {
    background: rgba(0, 0, 0, 0.5);
    padding: 20px;
    text-align: center;
    position: relative;
    z-index: 2;
}

header h1 {
    font-size: 2.5rem;
    margin: 0;
    font-weight: bold;
}

header p {
    font-size: 1.2rem;
    margin-top: 10px;
}

/* 导航栏样式 */
nav {
    display: flex;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    padding: 10px 0;
    position: sticky;
    top: 0;
    z-index: 1;
}

nav a {
    color: #fff;
    text-decoration: none;
    margin: 0 15px;
    font-size: 1rem;
    transition: color 0.3s ease;
}

nav a:hover {
    color: #FFC107;
}

/* 主内容区样式 */
main {
    flex: 1;
    padding: 40px 20px;
    max-width: 1200px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

section {
    margin-bottom: 40px;
}

section h2 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: #FFC107;
}

section p {
    font-size: 1.1rem;
    color: #fff;
}

pre {
    background: rgba(0, 0, 0, 0.7);
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
}

pre code {
    color: #00E676;
    font-family: 'Courier New', Courier, monospace;
    font-size: 1rem;
}

/* 图片样式 */
.image-gallery {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.image-gallery img {
    width: 100%;
    max-width: 320px;
    border-radius: 8px;
    object-fit: cover;
}

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

table, th, td {
    border: 1px solid #FFC107;
}

th, td {
    padding: 10px;
    text-align: left;
}

th {
    background: rgba(255, 193, 7, 0.8);
    color: #000;
}

td {
    background: rgba(255, 255, 255, 0.1);
}

/* 示例展示样式 */
.sample-display {
    background: rgba(0, 0, 0, 0.6);
    padding: 20px;
    border-radius: 10px;
    margin-top: 40px;
}

.sample-display h2 {
    color: #FFEB3B;
}

.sample-display article {
    max-height: 600px;
    overflow-y: auto;
}

.sample-display pre {
    background: rgba(33, 150, 243, 0.8);
}

.sample-display code {
    color: #00E5FF;
}

/* 页脚样式 */
footer {
    background: rgba(0, 0, 0, 0.5);
    text-align: center;
    padding: 20px;
    font-size: 0.9rem;
}

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

body {
    background: linear-gradient(-45deg, #FF9800, #673AB7, #2196F3, #4CAF50);
    background-size: 400% 400%;
    animation: gradientMove 15s ease infinite;
}

/* 响应式设计 */

/* 320px - 小尺寸手机 */
@media (max-width: 320px) {
    header h1 {
        font-size: 1.5rem;
    }
    nav a {
        margin: 0 5px;
        font-size: 0.8rem;
    }
    main {
        padding: 20px 10px;
    }
    section h2 {
        font-size: 1.5rem;
    }
}

/* 480px - 大尺寸手机 */
@media (min-width: 321px) and (max-width: 480px) {
    header h1 {
        font-size: 2rem;
    }
    nav a {
        margin: 0 10px;
        font-size: 0.9rem;
    }
    section h2 {
        font-size: 1.75rem;
    }
}

/* 768px - 竖屏平板 */
@media (min-width: 481px) and (max-width: 768px) {
    main {
        padding: 30px 15px;
    }
    section h2 {
        font-size: 2rem;
    }
    .image-gallery {
        justify-content: space-between;
    }
}

/* 1024px - 中等屏幕 */
@media (min-width: 769px) and (max-width: 1024px) {
    main {
        padding: 40px 20px;
    }
    section h2 {
        font-size: 2.25rem;
    }
}

/* 1200px - 桌面显示器 */
@media (min-width: 1025px) and (max-width: 1440px) {
    header h1 {
        font-size: 3rem;
    }
    nav a {
        font-size: 1rem;
    }
    section h2 {
        font-size: 2.5rem;
    }
}

/* 1440px及以上 - 大尺寸桌面显示器 */
@media (min-width: 1441px) {
    main {
        padding: 50px 30px;
    }
    header h1 {
        font-size: 3.5rem;
    }
    section h2 {
        font-size: 3rem;
    }
}