/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.site-header {
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 0;
}

.logo img {
    display: block;
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
}

.main-nav a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s;
}

.main-nav a:hover,
.main-nav a.active {
    color: #007bff;
}

.btn-download {
    background-color: #007bff;
    color: #fff;
    padding: 10px 20px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 500;
    transition: background-color 0.3s;
}

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

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 80px 0;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-text h1 {
    font-size: 42px;
    margin-bottom: 20px;
    font-weight: 700;
}

.divider {
    width: 60px;
    height: 3px;
    background-color: #fff;
    margin: 20px 0;
}

.hero-description {
    font-size: 18px;
    line-height: 1.8;
    margin-bottom: 30px;
}

.hero-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 30px;
}

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

.feature-item img {
    width: 24px;
    height: 24px;
}

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

.vip-benefits h2 {
    font-size: 24px;
    margin-bottom: 10px;
}

.hero-image img {
    width: 100%;
    height: auto;
    border-radius: 10px;
}

/* Section Styles */
section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 36px;
    margin-bottom: 15px;
    color: #333;
}

.section-subtitle {
    font-size: 18px;
    color: #666;
}

/* Platform Section */
.platform-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.platform-card {
    background: #fff;
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.platform-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.15);
}

.platform-card img {
    width: 200px;
    height: 200px;
    object-fit: contain;
    margin-bottom: 20px;
}

.platform-card h3 {
    font-size: 24px;
    margin-bottom: 15px;
}

.platform-card h3 a {
    color: #333;
    text-decoration: none;
}

.platform-card p {
    color: #666;
    margin-bottom: 20px;
    line-height: 1.6;
}

.btn-primary {
    display: inline-block;
    background-color: #007bff;
    color: #fff;
    padding: 12px 30px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 500;
    transition: background-color 0.3s;
}

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

/* About Section */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h3 {
    font-size: 28px;
    margin-bottom: 20px;
    color: #333;
}

.about-text p {
    color: #666;
    line-height: 1.8;
    margin-bottom: 20px;
}

.about-image img {
    width: 100%;
    height: auto;
    border-radius: 10px;
}

/* Videos Section */
.videos-tabs {
    background: #f8f9fa;
    padding: 40px;
    border-radius: 10px;
}

.tab-nav {
    display: flex;
    list-style: none;
    gap: 20px;
    margin-bottom: 30px;
    border-bottom: 2px solid #ddd;
}

.tab-nav li {
    padding-bottom: 15px;
}

.tab-nav a {
    text-decoration: none;
    color: #666;
    font-weight: 500;
    padding: 10px 20px;
    transition: color 0.3s;
}

.tab-nav li.active a,
.tab-nav a:hover {
    color: #007bff;
    border-bottom: 2px solid #007bff;
}

.video-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.video-image img {
    width: 100%;
    height: auto;
    border-radius: 10px;
}

.video-info h3 {
    font-size: 28px;
    margin-bottom: 20px;
}

.video-info p {
    color: #666;
    line-height: 1.8;
    margin-bottom: 15px;
}

/* FAQ Section */
.faq-list {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: #fff;
    border-radius: 10px;
    padding: 25px;
    margin-bottom: 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.faq-question {
    font-size: 20px;
    color: #333;
    margin-bottom: 15px;
    cursor: pointer;
}

.faq-answer {
    color: #666;
    line-height: 1.8;
}

/* News Section */
.news-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.news-updates h3,
.news-notices h3 {
    font-size: 28px;
    margin-bottom: 30px;
    color: #333;
}

.update-list,
.notice-list {
    list-style: none;
}

.update-list li,
.notice-list li {
    margin-bottom: 30px;
    padding-bottom: 30px;
    border-bottom: 1px solid #eee;
}

.update-list h4,
.notice-list h4 {
    font-size: 20px;
    margin-bottom: 10px;
    color: #333;
}

.update-list time,
.notice-list time {
    display: block;
    color: #999;
    margin-bottom: 15px;
    font-size: 14px;
}

.update-list ul {
    list-style: disc;
    margin-left: 20px;
    color: #666;
}

.notice-list time {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 60px;
    float: left;
    margin-right: 20px;
}

.notice-list .day {
    font-size: 32px;
    font-weight: bold;
    color: #007bff;
}

.notice-list .month {
    font-size: 14px;
    color: #999;
}

.notice-content {
    margin-left: 80px;
}

.notice-content h4 {
    margin-bottom: 10px;
}

.notice-content p {
    color: #666;
    line-height: 1.8;
}

/* Information Section */
.article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.article-card {
    background: #fff;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.article-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.15);
}

.article-image img {
    width: 100%;
    height: 216px;
    object-fit: cover;
}

.article-card time {
    display: block;
    color: #999;
    font-size: 14px;
    padding: 15px 20px 10px;
}

.article-card h3 {
    font-size: 20px;
    margin: 0 20px 15px;
}

.article-card h3 a {
    color: #333;
    text-decoration: none;
    transition: color 0.3s;
}

.article-card h3 a:hover {
    color: #007bff;
}

.article-card > p {
    color: #666;
    margin: 0 20px 15px;
    line-height: 1.6;
}

.read-more {
    display: inline-block;
    color: #007bff;
    text-decoration: none;
    margin: 0 20px 20px;
    font-weight: 500;
}

.section-footer {
    text-align: center;
}

.btn-more {
    display: inline-block;
    background-color: #007bff;
    color: #fff;
    padding: 12px 30px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 500;
    transition: background-color 0.3s;
}

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

/* Footer */
.site-footer {
    background-color: #2c3e50;
    color: #fff;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-copyright {
    text-align: center;
}

.footer-copyright img {
    margin-bottom: 20px;
}

.footer-copyright p {
    color: #bbb;
    margin-bottom: 15px;
}

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

.footer-copyright > a {
    display: block;
    color: #bbb;
    margin-top: 15px;
}

.footer-nav {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-nav-column h4 {
    font-size: 18px;
    margin-bottom: 20px;
    color: #fff;
}

.footer-nav-column ul {
    list-style: none;
}

.footer-nav-column ul li {
    margin-bottom: 10px;
}

.footer-nav-column ul li a {
    color: #bbb;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-nav-column ul li a:hover {
    color: #fff;
}

/* Download Section */
.download-section {
    padding: 80px 0;
    background: #f8f9fa;
}

.download-slider {
    position: relative;
}

.download-item {
    display: none;
}

.download-item.active {
    display: block;
}

.download-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    background: #fff;
    padding: 60px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.download-image img {
    width: 100%;
    height: auto;
    border-radius: 10px;
}

.download-info h2 {
    font-size: 32px;
    margin-bottom: 20px;
    color: #333;
}

.download-info > p {
    color: #666;
    line-height: 1.8;
    margin-bottom: 30px;
}

.qrcode {
    margin: 30px 0;
    text-align: center;
}

.qrcode img {
    width: 160px;
    height: 160px;
    border: 1px solid #ddd;
    border-radius: 5px;
    padding: 10px;
    background: #fff;
}

.qrcode-desc {
    text-align: center;
    color: #999;
    font-size: 14px;
    margin-bottom: 20px;
}

.download-tabs {
    margin-top: 40px;
    text-align: center;
}

.download-tabs ul {
    display: inline-flex;
    list-style: none;
    gap: 20px;
    background: #fff;
    padding: 10px;
    border-radius: 5px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.download-tabs li {
    padding: 10px 20px;
}

.download-tabs li.active a {
    color: #007bff;
    font-weight: 600;
}

.download-tabs a {
    color: #666;
    text-decoration: none;
    transition: color 0.3s;
}

.download-tabs a:hover {
    color: #007bff;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 20px;
    }

    .main-nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: 15px;
    }

    .hero-content {
        grid-template-columns: 1fr;
    }

    .about-content {
        grid-template-columns: 1fr;
    }

    .video-content {
        grid-template-columns: 1fr;
    }

    .news-content {
        grid-template-columns: 1fr;
    }

    .article-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .footer-nav {
        grid-template-columns: 1fr;
    }

    .hero-features {
        grid-template-columns: 1fr;
    }

    .platform-grid {
        grid-template-columns: 1fr;
    }

    .download-content {
        grid-template-columns: 1fr;
        padding: 30px;
    }

    .download-tabs ul {
        flex-wrap: wrap;
        justify-content: center;
    }
}

/* Article Page Styles */
.article-page {
    padding: 40px 0;
}

.breadcrumb {
    margin-bottom: 30px;
}

.breadcrumb ol {
    display: flex;
    list-style: none;
    gap: 10px;
    color: #666;
}

.breadcrumb a {
    color: #007bff;
    text-decoration: none;
}

.breadcrumb span {
    color: #999;
}

.article-header {
    margin-bottom: 40px;
    padding-bottom: 20px;
    border-bottom: 2px solid #eee;
}

.article-header h1 {
    font-size: 36px;
    margin-bottom: 15px;
    color: #333;
}

.article-subtitle {
    font-size: 18px;
    color: #666;
    margin-bottom: 20px;
}

.article-meta {
    display: flex;
    gap: 20px;
    color: #999;
    font-size: 14px;
}

.article-content {
    max-width: 900px;
    margin: 0 auto;
}

.article-content .article-image {
    margin: 30px 0;
    text-align: center;
}

.article-content .article-image img {
    width: 100%;
    max-width: 800px;
    height: auto;
    border-radius: 10px;
}

.article-text {
    line-height: 1.8;
    color: #333;
}

.article-text p {
    margin-bottom: 20px;
    font-size: 16px;
}

.article-text h2 {
    font-size: 28px;
    margin: 40px 0 20px;
    color: #333;
}

.article-text ul {
    margin: 20px 0;
    padding-left: 30px;
}

.article-text ul li {
    margin-bottom: 10px;
    line-height: 1.8;
}

.article-image-inline {
    margin: 30px 0;
    text-align: center;
}

.article-image-inline img {
    width: 100%;
    max-width: 600px;
    height: auto;
    border-radius: 10px;
}

.article-navigation {
    display: flex;
    justify-content: space-between;
    margin-top: 60px;
    padding-top: 30px;
    border-top: 1px solid #eee;
}

.article-navigation div {
    flex: 1;
}

.article-navigation span {
    color: #999;
    display: block;
    margin-bottom: 10px;
}

.article-navigation a {
    color: #007bff;
    text-decoration: none;
    font-weight: 500;
}

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

.next-article {
    text-align: right;
}