* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft YaHei", sans-serif;
}

body {
    background-color: #f5f5f5;
}

.header {
    background-color: #222;
    color: white;
    padding: 0 15%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 50px;
}

.left-header {
    display: flex;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    height: 30px;
    margin-right: 5px;
}

.right-header {
    display: flex;
    align-items: center;
}

.nav {
    display: flex;
    gap: 20px;
    margin-right: 30px;
}

.nav-item {
    color: white;
    text-decoration: none;
    font-size: 16px;
}

.right-menu {
    display: flex;
    gap: 15px;
    font-size: 12px;
}

.right-menu a {
    color: #ccc;
    text-decoration: none;
}

.main {
    background: url('../images/bj.jpg');
    background-size: cover;
    background-position: center;
    height: 550px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: white;
    text-align: center;
    padding: 20px;
    position: relative;
}

.main::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.download-btn {
    background-color: #7c68f8;
    color: white;
    padding: 15px 60px;
    border-radius: 30px;
    font-size: 18px;
    text-decoration: none;
    transition: background-color 0.3s;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    width: 200px;
    height: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 300px;
    margin-left: 50%;
    transform: translateX(50%);
}

.download-btn:hover {
    background-color: #6c5ce7;
}

.product-section {
    padding: 50px 15%;
    background-color: #f5f5f5;
}

.section-title {
    text-align: center;
    font-size: 28px;
    margin-bottom: 20px;
    font-weight: 500;
    color: #333;
}

.section-subtitle {
    text-align: center;
    font-size: 16px;
    color: #666;
    margin-bottom: 50px;
    line-height: 1.8;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.version-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
    margin-bottom: 30px;
}

.version-card {
    background-color: #ffffff;
    border-radius: 8px;
    padding: 30px 20px;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s, box-shadow 0.3s;
}

.version-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.version-logo {
    width: 60px;
    height: 60px;
    margin: 0 auto 15px;
}

.version-logo img {
    width: 100%;
}

.version-name {
    font-size: 18px;
    font-weight: 500;
    margin-bottom: 5px;
    color: #555;
}

.version-year {
    font-size: 20px;
    font-weight: bold;
    margin-bottom: 20px;
    color: #333;
}

.version-btn {
    background-color: #007BFF;
    color: white;
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 14px;
    text-decoration: none;
    display: inline-block;
    transition: background-color 0.3s;
    box-shadow: 0 2px 5px rgba(0, 123, 255, 0.3);
}

.version-btn:hover {
    background-color: #0056b3;
}

.footer {
    background-color: #222;
    color: #999;
    text-align: center;
    padding: 20px 0;
    font-size: 12px;
}

.footer-top {
    background-color: #0c3142;
    color: white;
    text-align: center;
    padding: 50px 0;
}

.footer-title {
    font-size: 32px;
    margin-bottom: 30px;
    font-weight: 300;
}

.footer-features {
    display: flex;
    justify-content: center;
    gap: 50px;
    margin-bottom: 40px;
}

.footer-feature {
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-feature i {
    font-size: 18px;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    margin-right: 5px;
}

.footer-download {
    background-color: #ff8c00;
    color: white;
    padding: 10px 40px;
    border-radius: 5px;
    font-size: 16px;
    text-decoration: none;
    display: inline-block;
    transition: background-color 0.3s;
}

.footer-download:hover {
    background-color: #e07b00;
}

.footer-links {
    margin-bottom: 10px;
}

.footer-links a {
    color: #999;
    text-decoration: none;
    margin: 0 10px;
}

.footer-links a:hover {
    color: #ccc;
}

.service-section {
    background-color: #f9f9f9;
    padding: 60px 0;
    text-align: center;
}

.service-title {
    font-size: 36px;
    font-weight: bold;
    margin-bottom: 20px;
    color: #333;
}

.service-subtitle {
    font-size: 18px;
    color: #666;
    margin-bottom: 60px;
}

.service-features {
    display: flex;
    justify-content: center;
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.service-feature {
    background-color: #fff;
    border-radius: 10px;
    padding: 40px 20px;
    width: 250px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s;
}

.service-feature:hover {
    transform: translateY(-5px);
}

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
}

.service-icon svg {
    width: 100%;
    height: 100%;
    stroke: #666;
    fill: none;
}

.service-name {
    font-size: 20px;
    font-weight: bold;
    margin-bottom: 10px;
    color: #333;
}

.service-desc {
    font-size: 14px;
    color: #999;
    text-transform: uppercase;
    letter-spacing: 1px;
}