/* 全局样式 */
:root {
    --primary-color: #4361ee;
    --primary-dark: #3a56d4;
    --secondary-color: #3f37c9;
    --accent-color: #4895ef;
    --text-color: #333;
    --text-light: #666;
    --text-lighter: #999;
    --bg-color: #fff;
    --bg-light: #f8f9fa;
    --border-color: #e1e4e8;
    --success-color: #4bb543;
    --error-color: #ff3333;
    --warning-color: #ffcc00;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--bg-color);
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: all 0.3s ease;
}

a:hover {
    color: var(--primary-dark);
}

img {
    max-width: 100%;
    height: auto;
}

ul {
    list-style: none;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 5px;
    font-weight: 500;
    text-align: center;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn.primary {
    background-color: var(--primary-color);
    color: white;
}

.btn.primary:hover {
    background-color: var(--primary-dark);
}

.btn.secondary {
    background-color: white;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.btn.secondary:hover {
    background-color: var(--primary-color);
    color: white;
}

.btn.large {
    padding: 12px 30px;
    font-size: 1.1rem;
}

.btn.small {
    padding: 8px 16px;
    font-size: 0.9rem;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.section-header h2 {
    font-size: 2rem;
    color: var(--text-color);
}

.view-all {
    color: var(--primary-color);
    font-weight: 500;
}

.view-all:hover {
    text-decoration: underline;
}

/* 头部样式 */
header {
    background-color: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 15px 0;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-color);
}

.logo img {
    height: 40px;
    margin-right: 10px;
}

nav ul {
    display: flex;
}

nav ul li {
    margin: 0 15px;
}

nav ul li a {
    color: var(--text-color);
    font-weight: 500;
    padding: 5px 0;
    position: relative;
}

nav ul li a.active {
    color: var(--primary-color);
}

nav ul li a.active:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
}

nav ul li a:hover {
    color: var(--primary-color);
}

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

/* 英雄区域 */
.hero {
    padding: 80px 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e8eb 100%);
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.hero-content {
    flex: 1;
    padding-right: 50px;
}

.hero-content h1 {
    font-size: 2.8rem;
    margin-bottom: 20px;
    line-height: 1.2;
    color: var(--text-color);
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    color: var(--text-light);
}

.hero-buttons {
    display: flex;
    gap: 15px;
}

.hero-image {
    flex: 1;
    text-align: center;
}

/* 特性区域 */
.features {
    padding: 80px 0;
    background-color: white;
}

.features h2 {
    text-align: center;
    margin-bottom: 50px;
    font-size: 2.2rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    padding: 30px;
    border-radius: 8px;
    background-color: var(--bg-light);
    text-align: center;
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.feature-card .icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.feature-card h3 {
    margin-bottom: 15px;
    font-size: 1.3rem;
}

/* 资讯区域 */
.news-section {
    padding: 80px 0;
    background-color: var(--bg-light);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.news-card {
    background-color: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.news-image {
    height: 200px;
    overflow: hidden;
}

.news-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.news-card:hover .news-image img {
    transform: scale(1.05);
}

.news-content {
    padding: 20px;
}

.news-content .date {
    display: block;
    font-size: 0.9rem;
    color: var(--text-lighter);
    margin-bottom: 10px;
}

.news-content h3 {
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.news-content h3 a {
    color: var(--text-color);
}

.news-content h3 a:hover {
    color: var(--primary-color);
}

.news-content p {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 15px;
}

/* CTA区域 */
.cta {
    padding: 60px 0;
    background-color: var(--primary-color);
    color: white;
    text-align: center;
}

.cta h2 {
    font-size: 2.2rem;
    margin-bottom: 15px;
}

.cta p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

/* 页脚 */
footer {
    background-color: #2b2d42;
    color: white;
    padding: 60px 0 0;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-column h3 {
    color: white;
    margin-bottom: 20px;
    font-size: 1.2rem;
}

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

.footer-column ul li a {
    color: #adb5bd;
}

.footer-column ul li a:hover {
    color: white;
}

.footer-column p {
    color: #adb5bd;
    margin-bottom: 20px;
}

.social-icons {
    display: flex;
    gap: 15px;
    margin-top: 15px;
}

.social-icons a {
    color: white;
    font-size: 1.2rem;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.social-icons a:hover {
    background-color: var(--primary-color);
    transform: translateY(-3px);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: #adb5bd;
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: 20px;
}

.footer-links a {
    color: #adb5bd;
}

.footer-links a:hover {
    color: white;
}

/* 资讯列表页 */
.page-header {
    padding: 60px 0 40px;
    text-align: center;
    background-color: var(--bg-light);
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.page-header p {
    font-size: 1.1rem;
    color: var(--text-light);
}

.news-filter {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.filter-item {
    padding: 8px 16px;
    border-radius: 20px;
    background-color: var(--bg-light);
    color: var(--text-light);
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.filter-item.active {
    background-color: var(--primary-color);
    color: white;
}

.filter-item:hover:not(.active) {
    background-color: #e1e4e8;
}

.news-items {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.news-item {
    display: flex;
    gap: 30px;
    padding: 30px;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
}

.news-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.news-image {
    flex: 0 0 300px;
    height: 200px;
    border-radius: 6px;
    overflow: hidden;
}

.news-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.news-item:hover .news-image img {
    transform: scale(1.05);
}

.news-content {
    flex: 1;
}

.news-content .category {
    display: inline-block;
    padding: 4px 10px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 4px;
    font-size: 0.8rem;
    margin-bottom: 10px;
}

.news-content .date {
    display: inline-block;
    margin-left: 10px;
    color: var(--text-lighter);
    font-size: 0.9rem;
}

.news-content h2 {
    margin-bottom: 15px;
    font-size: 1.5rem;
}

.news-content h2 a {
    color: var(--text-color);
}

.news-content h2 a:hover {
    color: var(--primary-color);
}

.news-content p {
    color: var(--text-light);
    margin-bottom: 15px;
}

.read-more {
    color: var(--primary-color);
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.read-more i {
    font-size: 0.8rem;
    transition: transform 0.3s ease;
}

.read-more:hover i {
    transform: translateX(3px);
}

.pagination {
    display: flex;
    justify-content: center;
    margin-top: 50px;
    gap: 10px;
}

.page-item {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 5px;
    background-color: var(--bg-light);
    color: var(--text-color);
    transition: all 0.3s ease;
}

.page-item.active {
    background-color: var(--primary-color);
    color: white;
}

.page-item:hover:not(.active) {
    background-color: #e1e4e8;
}

.page-item.next {
    width: auto;
    padding: 0 15px;
    gap: 5px;
}

/* 资讯详情页 */
.news-detail-header {
    padding: 60px 0 30px;
    background-color: var(--bg-light);
}

.breadcrumb {
    margin-bottom: 30px;
    font-size: 0.9rem;
    color: var(--text-light);
}

.breadcrumb a {
    color: var(--text-light);
}

.breadcrumb a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

.breadcrumb span {
    color: var(--text-color);
}

.news-meta {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.news-meta .category {
    padding: 4px 10px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 4px;
    font-size: 0.8rem;
}

.news-meta .date {
    color: var(--text-light);
    font-size: 0.9rem;
}

.share-buttons {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-left: auto;
}

.share-buttons span {
    color: var(--text-light);
    font-size: 0.9rem;
}

.share-buttons a {
    color: var(--text-light);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.share-buttons a:hover {
    color: var(--primary-color);
    transform: translateY(-2px);
}

.news-detail-header h1 {
    font-size: 2.2rem;
    margin-bottom: 20px;
    line-height: 1.3;
}

.author {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-top: 30px;
}

.author img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
}

.author .name {
    font-weight: 500;
    display: block;
}

.author .title {
    font-size: 0.9rem;
    color: var(--text-light);
}

.news-detail-content {
    padding: 50px 0;
}

.featured-image {
    margin-bottom: 40px;
    border-radius: 8px;
    overflow: hidden;
}

.featured-image img {
    width: 100%;
    height: auto;
    display: block;
}

article {
    max-width: 800px;
    margin: 0 auto;
}

article h2 {
    font-size: 1.8rem;
    margin: 40px 0 20px;
    line-height: 1.3;
}

article h3 {
    font-size: 1.4rem;
    margin: 30px 0 15px;
    line-height: 1.3;
}

article p {
    margin-bottom: 20px;
    font-size: 1.05rem;
    line-height: 1.7;
}

article ul, article ol {
    margin-bottom: 20px;
    padding-left: 20px;
}

article ul li, article ol li {
    margin-bottom: 10px;
}

.image-with-caption {
    margin: 30px 0;
}

.image-with-caption img {
    border-radius: 6px;
    margin-bottom: 10px;
}

.image-with-caption p {
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-light);
    margin-top: -10px;
}

blockquote {
    border-left: 4px solid var(--primary-color);
    padding-left: 20px;
    margin: 30px 0;
    font-style: italic;
    color: var(--text-light);
}

blockquote span {
    display: block;
    margin-top: 10px;
    font-style: normal;
    font-weight: 500;
    color: var(--text-color);
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 30px 0;
}

table th, table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

table th {
    background-color: var(--bg-light);
    font-weight: 600;
}

.callout {
    background-color: var(--bg-light);
    padding: 20px;
    border-radius: 6px;
    margin: 40px 0;
    border-left: 4px solid var(--primary-color);
}

.callout h3 {
    margin-top: 0;
    color: var(--primary-color);
}

.news-tags {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 50px 0;
    flex-wrap: wrap;
}

.news-tags span {
    font-weight: 500;
}

.news-tags a {
    padding: 5px 12px;
    background-color: var(--bg-light);
    border-radius: 20px;
    font-size: 0.9rem;
    color: var(--text-light);
}

.news-tags a:hover {
    background-color: #e1e4e8;
    color: var(--text-color);
}

.news-navigation {
    display: flex;
    justify-content: space-between;
    margin: 50px 0;
    gap: 30px;
}

.prev-news, .next-news {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 20px;
    background-color: var(--bg-light);
    border-radius: 8px;
    transition: all 0.3s ease;
}

.prev-news {
    text-align: left;
}

.next-news {
    text-align: right;
    flex-direction: row-reverse;
}

.prev-news:hover, .next-news:hover {
    background-color: #e1e4e8;
    transform: translateY(-3px);
}

.prev-news span, .next-news span {
    display: block;
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 5px;
}

.prev-news h3, .next-news h3 {
    font-size: 1.1rem;
    margin: 0;
}

.related-news {
    margin: 80px 0 50px;
}

.related-news h2 {
    font-size: 1.8rem;
    margin-bottom: 30px;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.related-item {
    background-color: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
}

.related-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.related-item img {
    width: 100%;
    height: 160px;
    object-fit: cover;
}

.related-item h3 {
    padding: 15px;
    font-size: 1.1rem;
    margin: 0;
}

.related-item h3 a {
    color: var(--text-color);
}

.related-item h3 a:hover {
    color: var(--primary-color);
}

.related-item .date {
    display: block;
    padding: 0 15px 15px;
    font-size: 0.9rem;
    color: var(--text-light);
}

/* 下载页 */
.download-header {
    padding: 80px 0 60px;
    text-align: center;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e8eb 100%);
}

.download-header h1 {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.download-header p {
    font-size: 1.2rem;
    color: var(--text-light);
    max-width: 700px;
    margin: 0 auto;
}

.download-tabs {
    display: flex;
    justify-content: center;
    margin-bottom: 40px;
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
}

.tab {
    padding: 12px 25px;
    cursor: pointer;
    border-bottom: 3px solid transparent;
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.tab.active {
    border-bottom-color: var(--primary-color);
    color: var(--primary-color);
}

.tab:hover:not(.active) {
    color: var(--primary-color);
    background-color: rgba(67, 97, 238, 0.05);
}

.download-content {
    display: none;
}

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

.download-card {
    display: flex;
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    margin-bottom: 60px;
}

.download-info {
    flex: 1;
    padding: 40px;
}

.download-info h2 {
    font-size: 1.8rem;
    margin-bottom: 15px;
}

.version {
    color: var(--text-light);
    margin-bottom: 20px;
    font-size: 0.95rem;
}

.features-list {
    margin: 25px 0;
}

.features-list li {
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.features-list i {
    color: var(--success-color);
}

.system-requirements {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.system-requirements h3 {
    font-size: 1.1rem;
    margin-bottom: 15px;
}

.system-requirements ul {
    list-style-type: disc;
    padding-left: 20px;
    color: var(--text-light);
}

.download-action {
    flex: 0 0 300px;
    padding: 40px;
    background-color: var(--bg-light);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.file-size {
    margin: 15px 0;
    color: var(--text-light);
    font-size: 0.9rem;
}

.secondary-download {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 20px;
}

.secondary-download a {
    color: var(--primary-color);
    font-size: 0.9rem;
}

.secondary-download a:hover {
    text-decoration: underline;
}

.download-faq {
    padding: 60px 0;
    background-color: var(--bg-light);
}

.download-faq h2 {
    text-align: center;
    margin-bottom: 40px;
    font-size: 2rem;
}

.faq-items {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 15px;
    border-radius: 8px;
    overflow: hidden;
    background-color: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.faq-question {
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
}

.faq-question h3 {
    font-size: 1.1rem;
    margin: 0;
}

.faq-question i {
    transition: transform 0.3s ease;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
    padding: 0 20px 20px;
    max-height: 500px;
}

.faq-answer p {
    margin-bottom: 15px;
}

.faq-answer p:last-child {
    margin-bottom: 0;
}

.more-help {
    text-align: center;
    margin-top: 50px;
}

.more-help p {
    margin-bottom: 15px;
    font-size: 1.1rem;
}

/* 帮助中心页 */
.help-header {
    padding: 80px 0 60px;
    text-align: center;
    background: linear-gradient(135deg, #4361ee 0%, #3a0ca3 100%);
    color: white;
}

.help-header h1 {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.help-header p {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 700px;
    margin: 0 auto 30px;
}

.search-box {
    max-width: 600px;
    margin: 0 auto;
    position: relative;
}

.search-box input {
    width: 100%;
    padding: 15px 20px;
    border-radius: 50px;
    border: none;
    font-size: 1rem;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.search-box button {
    position: absolute;
    right: 5px;
    top: 5px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.search-box button:hover {
    background-color: #3a56d4;
}

.help-categories {
    padding: 80px 0;
    background-color: white;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.category-card {
    padding: 30px;
    border-radius: 8px;
    background-color: var(--bg-light);
    transition: all 0.3s ease;
    text-align: center;
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.category-card .icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.category-card h2 {
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.category-card p {
    color: var(--text-light);
    margin-bottom: 20px;
}

.category-card a {
    color: var(--primary-color);
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.category-card a i {
    font-size: 0.8rem;
    transition: transform 0.3s ease;
}

.category-card a:hover i {
    transform: translateX(3px);
}

.popular-articles {
    padding: 60px 0;
    background-color: var(--bg-light);
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.article-card {
    padding: 25px;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.article-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.article-card h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.article-card h3 a {
    color: var(--text-color);
}

.article-card h3 a:hover {
    color: var(--primary-color);
}

.article-card p {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 15px;
}

.meta {
    display: flex;
    gap: 15px;
    font-size: 0.9rem;
    color: var(--text-lighter);
}

.video-tutorials {
    padding: 60px 0;
    background-color: white;
}

.video-tutorials h2 {
    text-align: center;
    margin-bottom: 40px;
    font-size: 2rem;
}

.videos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.video-card {
    background-color: var(--bg-light);
    border-radius: 8px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.video-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.video-thumbnail {
    position: relative;
    height: 180px;
    overflow: hidden;
}

.video-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.video-card:hover .video-thumbnail img {
    transform: scale(1.05);
}

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 50px;
    height: 50px;
    background-color: rgba(255, 255, 255, 0.8);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 1.2rem;
    transition: all 0.3s ease;
}

.video-card:hover .play-button {
    background-color: var(--primary-color);
    color: white;
}

.video-card h3 {
    padding: 15px;
    font-size: 1.1rem;
    margin: 0;
}

.video-card h3 a {
    color: var(--text-color);
}

.video-card h3 a:hover {
    color: var(--primary-color);
}

.video-card p {
    padding: 0 15px;
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 15px;
}

.duration {
    display: block;
    padding: 0 15px 15px;
    font-size: 0.9rem;
    color: var(--text-lighter);
}

.contact-support {
    padding: 60px 0;
    background-color: var(--bg-light);
}

.contact-card {
    max-width: 1000px;
    margin: 0 auto;
    padding: 40px;
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.contact-card h2 {
    font-size: 2rem;
    margin-bottom: 15px;
}

.contact-card p {
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 700px;
    margin: 0 auto 40px;
}

.contact-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.method {
    padding: 30px 20px;
    background-color: var(--bg-light);
    border-radius: 8px;
    transition: all 0.3s ease;
}

.method:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.method i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.method h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.method p {
    font-size: 0.95rem;
    color: var(--text-light);
    margin-bottom: 15px;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .hero .container {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-content {
        padding-right: 0;
        margin-bottom: 40px;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .news-item {
        flex-direction: column;
    }
    
    .news-image {
        flex: 0 0 auto;
        width: 100%;
    }
    
    .download-card {
        flex-direction: column;
    }
    
    .download-action {
        flex: 0 0 auto;
        width: 100%;
    }
}

@media (max-width: 768px) {
    header .container {
        flex-direction: column;
        gap: 20px;
    }
    
    nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .features-grid, .news-grid {
        grid-template-columns: 1fr;
    }
    
    .news-navigation {
        flex-direction: column;
        gap: 15px;
    }
    
    .prev-news, .next-news {
        width: 100%;
    }
    
    .contact-methods {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    .hero-content h1 {
        font-size: 2.2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: 15px;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .news-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .share-buttons {
        margin-left: 0;
    }
    
    .pagination {
        flex-wrap: wrap;
    }
}