/* 全局样式 */
body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
}

header {
    background-color: #59b5f1;
    color: white;
    padding: 10px 0;
}

.navbar ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
}

.navbar ul li {
    margin: 0 15px;
}

.navbar ul li a {
    color: white;
    text-decoration: none;
    font-size: 18px;
    transition: color 0.3s ease;
}

.navbar ul li a:hover {
    color: #ff6347;
}

.navbar ul li a.active {
    color: #ff6347;
}

main {
    padding: 20px;
    text-align: center;
}

.hero {
    background: linear-gradient(rgba(121, 206, 231, 0.5), rgba(115, 211, 240, 0.5)), url('background.jpg') no-repeat center center/cover;
    color: white;
    padding: 100px 20px;
    text-align: center;
    animation: fadeIn 2s;
}

.hero h1 {
    font-size: 36px;
    margin-bottom: 20px;
}

.hero p {
    font-size: 20px;
    margin-bottom: 30px;
}

.hero .btn {
    display: inline-block;
    background-color: #ff6347;
    color: white;
    padding: 10px 20px;
    text-decoration: none;
    font-size: 18px;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

.hero .btn:hover {
    background-color: #e0543b;
}

/* 功能介绍 */
.features {
    background-color: white;
    padding: 40px 20px;
    margin-top: 20px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.features h2 {
    font-size: 28px;
    margin-bottom: 20px;
}

.feature-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 30px;
}

.feature-image {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    margin-bottom: 10px;
}

.feature-content h3 {
    font-size: 22px;
    margin-bottom: 10px;
}

.feature-content p {
    font-size: 16px;
    text-align: center;
    max-width: 400px;
}

/* 软件截图 */
.screenshots {
    background-color: #f4f4f4;
    padding: 40px 20px;
    margin-top: 20px;
}

.screenshots h2 {
    font-size: 28px;
    margin-bottom: 20px;
}

.tabs {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
}

.tab-link {
    background-color: #ddd;
    color: #333;
    padding: 10px 20px;
    margin: 0 5px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.tab-link:hover, .tab-link.active {
    background-color: #ff6347;
    color: white;
}

.tab-content {
    display: none;
    text-align: center;
    padding: 20px;
    border: 1px solid #ddd;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.tab-content h3 {
    font-size: 24px;
    margin-bottom: 10px;
}

.tab