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

body {
    font-family: "Microsoft YaHei", Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

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

header {
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.header-top {
    border-bottom: 1px solid #e5e5e5;
}

.header-top .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 20px;
}

.logo-area img {
    width: 80px;
    height: 80px;
    object-fit: cover;
}

.title-group h1 {
    font-size: 24px;
    color: #2c3e50;
    margin-bottom: 5px;
}

.subtitle {
    font-size: 13px;
    color: #7f8c8d;
    font-style: italic;
}

.header-info {
    display: flex;
    gap: 30px;
}

.info-item {
    display: flex;
    flex-direction: column;
    text-align: right;
}

.info-item .label {
    font-size: 12px;
    color: #95a5a6;
    margin-bottom: 3px;
}

.info-item .value {
    font-size: 15px;
    color: #2c3e50;
    font-weight: bold;
}

nav {
    background-color: #3498db;
}

nav .container {
    padding: 0 20px;
}

nav ul {
    list-style: none;
    display: flex;
}

nav ul li a {
    display: block;
    padding: 15px 25px;
    color: #fff;
    text-decoration: none;
    font-size: 15px;
}

nav ul li a:hover,
nav ul li a.active {
    background-color: #2980b9;
}

.banner {
    position: relative;
    width: 100%;
    height: 500px;
    overflow: hidden;
    background-color: #34495e;
}

.banner img {
    width: 100%;
    height: 500px;
    object-fit: cover;
}

.banner-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
}

.banner-content {
    text-align: center;
    color: #fff;
    max-width: 800px;
    padding: 0 20px;
}

.banner-content h2 {
    font-size: 42px;
    margin-bottom: 20px;
    letter-spacing: 2px;
}

.banner-content p {
    font-size: 18px;
    line-height: 1.8;
    margin-bottom: 10px;
}

.banner-desc {
    font-size: 16px;
    color: #ecf0f1;
}

section {
    padding: 60px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 32px;
    color: #2c3e50;
    margin-bottom: 15px;
}

.divider {
    width: 60px;
    height: 3px;
    background-color: #3498db;
    margin: 0 auto 15px;
}

.section-subtitle {
    font-size: 14px;
    color: #95a5a6;
    font-style: italic;
    letter-spacing: 1px;
}

.intro-section {
    background-color: #fff;
}

.intro-content {
    display: flex;
    gap: 50px;
    align-items: center;
}

.intro-text {
    flex: 1;
}

.intro-text p {
    font-size: 15px;
    line-height: 2;
    text-align: justify;
    margin-bottom: 20px;
    color: #555;
}

.intro-image {
    width: 450px;
}

.intro-image img {
    width: 450px;
    height: 300px;
    object-fit: cover;
    border-radius: 5px;
    border: 1px solid #e0e0e0;
}

.statistics {
    background-color: #3498db;
    color: #fff;
}

.stats-grid {
    display: flex;
    justify-content: space-around;
    gap: 30px;
}

.stat-item {
    text-align: center;
    flex: 1;
}

.stat-number {
    font-size: 48px;
    font-weight: bold;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 18px;
    margin-bottom: 5px;
}

.stat-desc {
    font-size: 14px;
    color: #ecf0f1;
}

.features-section {
    background-color: #f9f9f9;
}

.features-grid {
    display: flex;
    gap: 30px;
}

.feature-box {
    flex: 1;
    background-color: #fff;
    padding: 30px;
    border-radius: 5px;
    border: 1px solid #e0e0e0;
}

.feature-icon {
    text-align: center;
    margin-bottom: 20px;
}

.feature-icon img {
    width: 80px;
    height: 80px;
    object-fit: cover;
}

.feature-box h3 {
    font-size: 20px;
    color: #2c3e50;
    margin-bottom: 20px;
    text-align: center;
}

.feature-content p {
    font-size: 14px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 15px;
}

.feature-content ul {
    list-style: none;
    padding-left: 0;
}

.feature-content ul li {
    padding: 8px 0;
    padding-left: 20px;
    font-size: 13px;
    color: #555;
    border-bottom: 1px solid #f0f0f0;
}

.feature-content ul li:before {
    content: "•";
    color: #3498db;
    font-weight: bold;
    display: inline-block;
    width: 20px;
    margin-left: -20px;
}

.cooperation {
    background-color: #fff;
}

.coop-content {
    max-width: 1100px;
    margin: 0 auto;
}

.coop-main {
    display: flex;
    flex-direction: column;
    gap: 40px;
    margin-bottom: 50px;
}

.coop-card {
    display: flex;
    gap: 30px;
    padding: 30px;
    background-color: #f9f9f9;
    border-radius: 5px;
    border: 1px solid #e0e0e0;
}

.coop-image {
    width: 300px;
}

.coop-image img {
    width: 300px;
    height: 220px;
    object-fit: cover;
    border-radius: 5px;
}

.coop-info {
    flex: 1;
}

.coop-info h3 {
    font-size: 22px;
    color: #2c3e50;
    margin-bottom: 10px;
}

.coop-role {
    display: inline-block;
    padding: 5px 15px;
    background-color: #3498db;
    color: #fff;
    font-size: 12px;
    border-radius: 3px;
    margin-bottom: 15px;
}

.coop-intro {
    font-size: 14px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 20px;
}

.coop-detail h4 {
    font-size: 16px;
    color: #2c3e50;
    margin-bottom: 10px;
}

.coop-detail ul {
    list-style: none;
    padding-left: 0;
}

.coop-detail ul li {
    padding: 6px 0;
    padding-left: 20px;
    font-size: 13px;
    color: #555;
}

.coop-detail ul li:before {
    content: "▸";
    color: #3498db;
    margin-left: -20px;
    margin-right: 8px;
}

.coop-mechanism {
    padding: 30px;
    background-color: #ecf0f1;
    border-radius: 5px;
}

.coop-mechanism h3 {
    font-size: 22px;
    color: #2c3e50;
    margin-bottom: 25px;
    text-align: center;
}

.mechanism-grid {
    display: flex;
    gap: 25px;
}

.mechanism-item {
    flex: 1;
    background-color: #fff;
    padding: 20px;
    border-radius: 5px;
}

.mechanism-item h4 {
    font-size: 16px;
    color: #2c3e50;
    margin-bottom: 10px;
}

.mechanism-item p {
    font-size: 13px;
    color: #666;
    line-height: 1.7;
}

.achievements {
    background-color: #f9f9f9;
}

.achievement-layout {
    display: flex;
    gap: 40px;
}

.achievement-main {
    width: 480px;
}

.achievement-main img {
    width: 480px;
    height: 600px;
    object-fit: cover;
    border-radius: 5px;
    border: 1px solid #e0e0e0;
}

.achievement-list {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.achievement-item {
    display: flex;
    gap: 20px;
    padding: 20px;
    background-color: #fff;
    border-radius: 5px;
    border-left: 4px solid #3498db;
}

.achievement-icon {
    font-size: 32px;
    font-weight: bold;
    color: #3498db;
    min-width: 50px;
}

.achievement-text h4 {
    font-size: 17px;
    color: #2c3e50;
    margin-bottom: 8px;
}

.achievement-text p {
    font-size: 13px;
    color: #666;
    line-height: 1.7;
}

.news-section {
    background-color: #fff;
}

.news-grid {
    display: flex;
    gap: 30px;
}

.news-item {
    flex: 1;
    background-color: #f9f9f9;
    border-radius: 5px;
    overflow: hidden;
    border: 1px solid #e0e0e0;
}

.news-image {
    position: relative;
    width: 100%;
    height: 220px;
}

.news-image img {
    width: 100%;
    height: 220px;
    object-fit: cover;
}

.news-date {
    position: absolute;
    top: 15px;
    right: 15px;
    background-color: #3498db;
    color: #fff;
    padding: 10px 15px;
    border-radius: 3px;
    text-align: center;
}

.date-day {
    display: block;
    font-size: 24px;
    font-weight: bold;
}

.date-month {
    display: block;
    font-size: 12px;
}

.news-content {
    padding: 25px;
}

.news-content h3 {
    font-size: 18px;
    color: #2c3e50;
    margin-bottom: 15px;
}

.news-content p {
    font-size: 13px;
    color: #666;
    line-height: 1.8;
}

.contact-section {
    background-color: #ecf0f1;
}

.contact-grid {
    display: flex;
    gap: 40px;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info {
    flex: 1;
}

.contact-info h3 {
    font-size: 24px;
    color: #2c3e50;
    margin-bottom: 30px;
}

.contact-items {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-item {
    display: flex;
    justify-content: space-between;
    padding: 15px 0;
    border-bottom: 1px solid #bdc3c7;
}

.contact-label {
    font-size: 15px;
    color: #7f8c8d;
    font-weight: bold;
}

.contact-value {
    font-size: 15px;
    color: #2c3e50;
}

.contact-map {
    width: 450px;
}

.contact-map img {
    width: 450px;
    height: 300px;
    object-fit: cover;
    border-radius: 5px;
}

footer {
    background-color: #2c3e50;
    color: #ecf0f1;
    padding: 40px 0 30px;
}

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

.footer-info {
    margin-bottom: 20px;
}

.footer-title {
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 10px;
}

.footer-info p {
    font-size: 13px;
    color: #bdc3c7;
}

.footer-copyright p {
    font-size: 13px;
    color: #95a5a6;
    margin-bottom: 5px;
}

.page-banner {
    background-color: #3498db;
    padding: 80px 0;
    text-align: center;
}

.page-banner-content h2 {
    font-size: 38px;
    color: #fff;
    margin-bottom: 15px;
}

.page-banner-content p {
    font-size: 16px;
    color: #ecf0f1;
}

.activity-overview {
    background-color: #fff;
}

.overview-content {
    display: flex;
    gap: 50px;
}

.overview-text {
    flex: 1;
}

.overview-text h3 {
    font-size: 24px;
    color: #2c3e50;
    margin-bottom: 20px;
}

.overview-text p {
    font-size: 14px;
    color: #666;
    line-height: 2;
    text-align: justify;
    margin-bottom: 15px;
}

.overview-stats {
    width: 350px;
    background-color: #f9f9f9;
    padding: 30px;
    border-radius: 5px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 25px;
}

.overview-stat-item {
    text-align: center;
    padding: 20px;
    background-color: #fff;
    border-radius: 5px;
}

.stat-num {
    font-size: 36px;
    font-weight: bold;
    color: #3498db;
    margin-bottom: 8px;
}

.stat-text {
    font-size: 14px;
    color: #666;
}

.offline-activities {
    background-color: #f9f9f9;
}

.activity-category {
    margin-bottom: 50px;
}

.category-title {
    font-size: 24px;
    color: #2c3e50;
    padding-left: 15px;
    border-left: 4px solid #3498db;
    margin-bottom: 30px;
}

.activity-list {
    display: flex;
    flex-direction: column;
    gap: 35px;
}

.activity-card-detail {
    display: flex;
    gap: 30px;
    background-color: #fff;
    padding: 30px;
    border-radius: 5px;
    border: 1px solid #e0e0e0;
}

.activity-image-box {
    position: relative;
    width: 350px;
}

.activity-image-box img {
    width: 350px;
    height: 260px;
    object-fit: cover;
    border-radius: 5px;
}

.activity-tag {
    position: absolute;
    top: 15px;
    left: 15px;
    background-color: #3498db;
    color: #fff;
    padding: 5px 15px;
    border-radius: 3px;
    font-size: 13px;
}

.activity-detail-info {
    flex: 1;
}

.activity-detail-info h4 {
    font-size: 22px;
    color: #2c3e50;
    margin-bottom: 15px;
}

.activity-meta {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
}

.meta-item {
    font-size: 13px;
    color: #7f8c8d;
}

.activity-description {
    font-size: 14px;
    color: #666;
    line-height: 1.8;
    text-align: justify;
    margin-bottom: 20px;
}

.activity-highlights {
    background-color: #f9f9f9;
    padding: 20px;
    border-radius: 5px;
    margin-bottom: 20px;
}

.activity-highlights h5 {
    font-size: 16px;
    color: #2c3e50;
    margin-bottom: 10px;
}

.activity-highlights ul {
    list-style: none;
    padding-left: 0;
}

.activity-highlights ul li {
    padding: 6px 0;
    padding-left: 20px;
    font-size: 13px;
    color: #555;
}

.activity-highlights ul li:before {
    content: "✓";
    color: #27ae60;
    font-weight: bold;
    margin-left: -20px;
    margin-right: 8px;
}

.activity-effect {
    font-size: 14px;
    color: #555;
    line-height: 1.8;
    font-style: italic;
    padding-left: 15px;
    border-left: 3px solid #3498db;
}

.online-activities-section {
    background-color: #fff;
}

.online-activity-intro {
    text-align: center;
    max-width: 900px;
    margin: 0 auto 40px;
}

.online-activity-intro p {
    font-size: 15px;
    color: #666;
    line-height: 2;
}

.online-activity-grid {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.online-activity-box {
    display: flex;
    gap: 35px;
    padding: 30px;
    background-color: #f9f9f9;
    border-radius: 5px;
    border: 1px solid #e0e0e0;
}

.online-activity-image {
    width: 400px;
}

.online-activity-image img {
    width: 400px;
    height: 280px;
    object-fit: cover;
    border-radius: 5px;
}

.online-activity-content {
    flex: 1;
}

.online-activity-content h4 {
    font-size: 22px;
    color: #2c3e50;
    margin-bottom: 10px;
}

.online-meta {
    font-size: 13px;
    color: #3498db;
    margin-bottom: 15px;
}

.online-desc {
    font-size: 14px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 20px;
}

.online-features {
    background-color: #fff;
    padding: 20px;
    border-radius: 5px;
    margin-bottom: 15px;
}

.online-features h5 {
    font-size: 16px;
    color: #2c3e50;
    margin-bottom: 12px;
}

.online-features ul {
    list-style: none;
    padding-left: 0;
}

.online-features ul li {
    padding: 6px 0;
    padding-left: 20px;
    font-size: 13px;
    color: #555;
}

.online-features ul li:before {
    content: "➤";
    color: #3498db;
    margin-left: -20px;
    margin-right: 8px;
    font-size: 11px;
}

.online-effect {
    font-size: 13px;
    color: #555;
    line-height: 1.7;
    font-style: italic;
}

.upcoming-section {
    background-color: #f9f9f9;
}

.upcoming-grid {
    display: flex;
    gap: 30px;
}

.upcoming-card {
    flex: 1;
    background-color: #fff;
    border-radius: 5px;
    overflow: hidden;
    border: 1px solid #e0e0e0;
}

.upcoming-header {
    display: flex;
    gap: 20px;
    padding: 25px;
    background-color: #ecf0f1;
}

.upcoming-date-box {
    text-align: center;
    min-width: 70px;
}

.date-month {
    display: block;
    font-size: 14px;
    color: #7f8c8d;
    margin-bottom: 5px;
}

.date-day {
    display: block;
    font-size: 36px;
    font-weight: bold;
    color: #3498db;
    margin-bottom: 3px;
}

.date-year {
    display: block;
    font-size: 12px;
    color: #95a5a6;
}

.upcoming-title h4 {
    font-size: 18px;
    color: #2c3e50;
    margin-bottom: 5px;
}

.upcoming-category {
    font-size: 13px;
    color: #7f8c8d;
}

.upcoming-body {
    padding: 25px;
}

.upcoming-intro {
    font-size: 14px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 20px;
}

.upcoming-details {
    background-color: #f9f9f9;
    padding: 15px;
    border-radius: 5px;
}

.detail-item {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid #e0e0e0;
}

.detail-item:last-child {
    border-bottom: none;
}

.detail-label {
    font-size: 13px;
    color: #7f8c8d;
    font-weight: bold;
}

.detail-value {
    font-size: 13px;
    color: #2c3e50;
}

.participation {
    background-color: #fff;
}

.participation-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.participation-content h3 {
    font-size: 26px;
    color: #2c3e50;
    margin-bottom: 20px;
}

.participation-content > p {
    font-size: 14px;
    color: #666;
    line-height: 2;
    margin-bottom: 35px;
}

.participation-methods {
    display: flex;
    gap: 30px;
}

.method-item {
    flex: 1;
    padding: 30px 20px;
    background-color: #f9f9f9;
    border-radius: 5px;
    border: 2px solid #e0e0e0;
}

.method-item h4 {
    font-size: 18px;
    color: #3498db;
    margin-bottom: 15px;
}

.method-item p {
    font-size: 13px;
    color: #666;
    line-height: 1.7;
}