body {
    font-family: 'Roboto', sans-serif;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.container {
    width: 80%;
    margin: 0 auto;
    padding: 20px;
}

header {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 50px 0;
}

header h1 {
    margin: 0;
    font-size: 2.5em;
}

header p {
    font-size: 1.2em;
    margin: 10px 0 0;
}

.hero {
    text-align: center;
    padding: 50px 0;
    background-color: #f4f4f4;
}

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

.hero-content {
    margin-top: 20px;
}

.hero h2 {
    font-size: 2em;
    margin: 0;
}

.hero p {
    font-size: 1.2em;
    margin: 10px 0 20px;
}

.download-btn {
    display: inline-block;
    padding: 10px 20px;
    background-color: #ff5733;
    color: #fff;
    text-decoration: none;
    font-size: 1em;
    border-radius: 5px;
}

.download-btn:hover {
    background-color: #ff3300;
}

.features, .screenshots {
    padding: 50px 0;
}

.features h2, .screenshots h2 {
    text-align: center;
    font-size: 2em;
    margin-bottom: 20px;
}

.features ul {
    list-style: none;
    padding: 0;
}

.features li {
    background: url('path/to/your/check-icon.png') no-repeat left center;
    background-size: 20px 20px;
    padding-left: 30px;
    margin-bottom: 15px;
    font-size: 1.2em;
}

.screenshot-grid {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
}

.screenshot-grid img {
    max-width: 30%;
    margin-bottom: 20px;
    border-radius: 10px;
}

footer {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 20px 0;
}

footer p {
    margin: 0;
}

.social-links {
    list-style: none;
    padding: 0;
    margin: 10px 0 0;
}

.social-links li {
    display: inline;
    margin: 0 10px;
}

.social-links a {
    color: #fff;
    text-decoration: none;
}

.centered-container {
	width: 60%
    margin: 0 auto;
    /* text-align: left; */
	padding: 20px;
	box-sizing: border-box;
}
.centered-container ul {
    /* list-style-type: none;  */
    padding: 0; /* 去掉默认的内边距 */
    margin: 0; /* 去掉默认的外边距 */
}
.centered-container li {
	font-size: 1.3em;
    padding: 10px 0; /* 给列表项一些垂直空间 */
    word-wrap: break-word; /* 确保长单词或URL可以折行 */
    white-space: normal; /* 确保空白处理为正常 */
}

.icon-img {
    border-radius: 18px; /* 所有角都是15像素的圆角 */
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.4);
}