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

header {
    background: #333;
    color: #fff;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem;
}

.logo {
    flex: 1;
}

.header-logo {
    width: 120px;
    height: auto;
}

.navigation {
    flex: 1;
    text-align: right;
}

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

.navigation li {
    display: inline;
    margin-left: 20px;
}

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

.navigation a:hover {
    text-decoration: underline;
}

.app-info {
    display: flex;
    align-items: center;
    justify-content: space-around;
    padding: 2rem;
    background: #fff;
    margin: 1rem;
    border-radius: 8px;
}

.app-icon {
    width: 100px;
    height: 100px;
    margin-right: 20px;
    border-radius: 20px; /* 圆角半径为边长的一半 */
}

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

.features, .screenshots {
    padding: 2rem;
    background: #fff;
    margin: 1rem;
    border-radius: 8px;
}

.gallery img {
    width: 100%;
    max-width: 300px;
    margin: 0.5rem;
}

footer {
    text-align: center;
    padding: 1rem;
    background: #333;
    color: #fff;
}