body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
}

/* 网页头部样式 */
header {
    background-color: #ff46a9;
    color: white;
    text-align: center;
    padding: 20px;
    width: 950px;
    margin-bottom: 0px;
    margin: auto;
}

header h1 {
    margin: 0px;
    font-size: 28px;
}

/* 主体内容区域样式 */
main {
    padding: 20px;
}

section {
    background-color: white;
    padding: 20px;
    margin-bottom: 0px;
    width: 950px;
    border-radius: 5px;
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.1);
    margin: auto;
}

section h2 {
    color: #ff3df6;
    margin-top: 0;
    font-size: 22px;
}

p {
    margin: 10px 0;
}

/* 列表样式 */
ul,
ol {
    padding-left: 20px;
}

/* 底部样式 */
footer {
    color: crimson;
    text-align: center;
    padding: 10px;
    width: 970px;
    margin: auto;
    background-image: linear-gradient(70deg, #ffcdee, #dbd9ff,
            #b8fffa, #c1dfff);
}

h4 {
    font-family: '楷体';
    background-color: #ff8bd3;
    font-size: 24px;
    width: 990px;
}

a:link,
a:hover {
    color: crimson;
    text-decoration: none;
}

li {
    list-style-type: lower-alpha;
}

h2 ul {
    list-style-image: url(aaaa.png);
}

.kkk {
    border: 2px solid deeppink;
    border-radius: 50%;
    display: inline-block;
    box-shadow: 2px 1px 3px 2px blueviolet,
        -1px -2px 3px 2px firebrick;
    position: relative;
    left: 176px;
    top: 88px;
    float: left;
}

.container {
    position: relative;
    width: 990px;
    margin: auto;
    perspective: 600px;
}

.initial-image {
    width: 100%;
    height: auto;
    transition: border-radius 2s;
}

.final-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transform: rotateX(90deg);
    opacity: 0;
}