/* 全局重置+基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft Yahei", sans-serif;
}
body {
    color: #333;
    font-size: 16px;
    line-height: 1.6;
}
a {
    text-decoration: none;
    color: #333;
    transition: all 0.3s;
}
a:hover {
    color: #007bff;
}
ul {
    list-style: none;
}
.container {
    width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}
@media (max-width: 1200px) {
    .container {
        width: 100%;
    }
}

/* 头部样式 */
.header {
    padding: 20px 0;
    border-bottom: 1px solid #eee;
}
.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.logo img {
    display: block;
}
.nav ul {
    display: flex;
}
.nav li {
    margin: 0 15px;
}
.nav a.active {
    color: #007bff;
    font-weight: bold;
}
.download-btn .btn-primary {
    background: #007bff;
    color: #fff;
    padding: 10px 20px;
    border-radius: 4px;
}
.download-btn .btn-primary:hover {
    background: #0056b3;
}

/* banner样式 */
.banner {
    background: #f8f9fa;
    padding: 80px 0;
    text-align: center;
}
.banner h1 {
    font-size: 36px;
    margin-bottom: 20px;
    color: #333;
}
.banner p {
    font-size: 18px;
    margin-bottom: 30px;
    color: #666;
}
.btn-big {
    background: #007bff;
    color: #fff;
    padding: 15px 30px;
    border-radius: 4px;
    font-size: 18px;
}
.banner img {
    margin-top: 40px;
    max-width: 100%;
}

/* 核心内容区 */
.main-content {
    padding: 80px 0;
}
.main-content h2 {
    font-size: 28px;
    text-align: center;
    margin-bottom: 40px;
    color: #333;
}
.advantage-list {
    display: flex;
    justify-content: space-between;
    margin-bottom: 60px;
}
.advantage-item {
    width: 30%;
    text-align: center;
    padding: 20px;
}
.advantage-item img {
    margin-bottom: 20px;
}
.advantage-item h3 {
    font-size: 20px;
    margin-bottom: 10px;
}
.download-area {
    background: #f8f9fa;
    padding: 40px;
    border-radius: 8px;
    text-align: center;
    margin-bottom: 60px;
}
.download-list {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-top: 30px;
}
.btn-download {
    background: #28a745;
    color: #fff;
    padding: 12px 24px;
    border-radius: 4px;
}
.btn-download:hover {
    background: #218838;
}
.news-recommend {
    text-align: center;
}
.news-recommend ul {
    width: 80%;
    margin: 0 auto 20px;
    text-align: left;
}
.news-recommend li {
    padding: 10px 0;
    border-bottom: 1px dashed #eee;
    display: flex;
    justify-content: space-between;
}
.more-news {
    color: #007bff;
}

/* 底部样式 */
.footer {
    background: #333;
    color: #fff;
    padding: 40px 0;
    text-align: center;
}
.footer-nav ul {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
}
.footer-nav li {
    margin: 0 10px;
}
.footer-nav a {
    color: #fff;
}
.copyright {
    font-size: 14px;
    color: #ccc;
}