* {
    padding: 0%;
    margin: 0%; 
    font-size:16px;
 }
 
 body {
     background-color: burlywood;
     position: relative;
     display: flex;
     flex-wrap: wrap; /* 允许子元素换行 */
     flex-direction: row; /* 水平排列子元素 */
     /* min-height: 100vh;  确保body至少占据视口高度 */
}
 
/* 头部图片 */
 header {
     width: 100%;
     height: 16vh; /* 占页面的16% */
     text-align: center;
     position: relative;
     display: flex;
     justify-content: center;
     align-items: center;
     order: 1;
 }

header img {
    max-width: 100%;
    height: auto;
}

/* 导航栏 */
nav {
    width: 100%;
    font-size: 1.5rem;
    box-sizing: border-box;
    order: 2; /* 让nav居右 */
    display: flex;
    flex-direction: row; /* 水平排列子元素*/
    justify-content: center; /* 水平居中 */
    padding-left: 2px;
    padding-right: 2px;
    margin-left: 2px;
    margin-right: 2px
}

nav div {
    padding: 2px;
    margin: 2px;
}


footer {
    width: 100%;
    height: 10vh; /* 占页面的10% */
    text-align: center;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    order: 4;
}

.container {
    width: 100%;
    max-width: 900px;
    
    margin: 20px auto;
    position: relative;
    overflow: hidden;
    
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    order: 3;
}

div.container h1  {
    text-align: center;
    font-size: 2em;
}

div.container p {
    text-indent: 2em;
    font-size: 1.5em;
}

div.container h2  {
    text-align: center;
    font-size: 1.75em;
}

div.container h3  {
    text-indent: 2em;
    font-size: 1.5em;
}

div.container table  {
    padding-left: 50px;
}

div.container table th  {
    text-align: left;
    font-size: 1.5em;
}

div.container table td  {
    width: 75px;
    padding: 5px 5px;
    font-size: 1.5em;
}

.imgcontainer {
    width: 100%;
    max-width: 900px;
    
    margin: 20px auto;
    position: relative;
    overflow: hidden;
    
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    order: 3;
}

div.imgcontainer img {
    width: 100%;
    height: auto;
    display: block;
}


/* 平板屏幕 */
@media (max-width: 1024px) {
    nav {
        width: 15%; /* 增加导航栏宽度 */
        font-size: 1.2rem; /* 减小字体大小 */
    }
    article {
        width: 85%; /* 减小文章区域宽度 */
        padding: 2rem; /* 减小内边距 */
    }
}

/* 手机屏幕 */
@media (max-width: 768px) {
    .main-content {
        flex-direction: column; /* 垂直排列导航栏和文章区域 */
    }
    nav {
        width: 100%; /* 导航栏占满宽度 */
        height: auto; /* 高度自适应 */
        order: 1; /* 导航栏居上 */
        flex-direction: column; /* 垂直排列导航项 */
    }
    article {
        width: 100%; /* 文章区域占满宽度 */
        padding: 1rem; /* 减小内边距 */
        order: 2; /* 文章区域居下 */
    }
    .carousel-container {
        height: 20vh;
    }
}