* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

:root {
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --secondary: #10b981;
    --dark: #1f2937;
    --light: #f9fafb;
    --gray: #6b7280;
    --border: #e5e7eb;
}

html {
    scroll-behavior: smooth;
}

body {
    color: var(--dark);
    background-color: var(--light);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* 导航栏样式 */
header {
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    padding: 15px 0;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    font-weight: 700;
    font-size: 24px;
    color: var(--primary);
    text-decoration: none;
}

.logo i {
    margin-right: 10px;
    font-size: 28px;
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    margin-left: 30px;
}

.nav-links a {
    text-decoration: none;
    color: var(--dark);
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--primary);
}

.btn {
    display: inline-block;
    padding: 12px 28px;
    background: var(--primary);
    color: white;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
}

.btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(79, 70, 229, 0.3);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

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

/* 页面标题 */
.page-header {
    padding: 120px 0 60px;
    background: linear-gradient(135deg, #f3f4f6 0%, #e5e7eb 100%);
    text-align: center;
}

.page-header h1 {
    font-size: 2.8rem;
    margin-bottom: 15px;
    color: var(--dark);
}

.breadcrumb {
    display: flex;
    justify-content: center;
    list-style: none;
}

.breadcrumb li {
    margin: 0 10px;
    color: var(--gray);
}

.breadcrumb li a {
    color: var(--primary);
    text-decoration: none;
}

.breadcrumb li:not(:last-child)::after {
    content: ">";
    margin-left: 15px;
}

/* 新闻列表样式 */
.news-section {
    padding: 80px 0;
}

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

.section-title h2 {
    font-size: 2.5rem;
    color: var(--dark);
    margin-bottom: 15px;
}

.section-title p {
    color: var(--gray);
    max-width: 600px;
    margin: 0 auto;
}

.news-filters {
    display: flex;
    justify-content: center;
    margin-bottom: 40px;
    flex-wrap: wrap;
    gap: 15px;
}

.filter-btn {
    padding: 8px 20px;
    background: white;
    border: 1px solid var(--border);
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s;
}

.filter-btn.active, .filter-btn:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.news-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s, box-shadow 0.3s;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px 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;
}

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

.news-content {
    padding: 25px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

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

.news-card h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: var(--dark);
}

.news-card p {
    color: var(--gray);
    margin-bottom: 20px;
    flex-grow: 1;
}

.news-link {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    margin-top: auto;
}

.news-link i {
    margin-left: 5px;
    transition: transform 0.3s;
}

.news-link:hover i {
    transform: translateX(5px);
}

.news-category {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(79, 70, 229, 0.1);
    color: var(--primary);
    border-radius: 50px;
    font-size: 0.8rem;
    margin-bottom: 10px;
}

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

.pagination a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--border);
    color: var(--dark);
    text-decoration: none;
    transition: all 0.3s;
}

.pagination a.active, .pagination a:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.pagination a.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* 新闻详情样式 */
.news-detail {
    padding: 80px 0;
    display: none;
}

.news-detail.active {
    display: block;
}

.news-article {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    border-radius: 15px;
    padding: 40px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
}

.news-header {
    margin-bottom: 30px;
}

.news-header h1 {
    font-size: 2.2rem;
    margin-bottom: 15px;
    color: var(--dark);
}

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

.news-meta span {
    display: flex;
    align-items: center;
}

.news-meta i {
    margin-right: 5px;
}

.article-image {
    margin-bottom: 30px;
    border-radius: 10px;
    overflow: hidden;
}

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

.article-content {
    line-height: 1.8;
}

.article-content p {
    margin-bottom: 20px;
}

.article-content h2 {
    font-size: 1.8rem;
    margin: 30px 0 15px;
    color: var(--dark);
}

.article-content blockquote {
    border-left: 4px solid var(--primary);
    padding-left: 20px;
    margin: 25px 0;
    font-style: italic;
    color: var(--gray);
}

.back-to-news {
    display: inline-flex;
    align-items: center;
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    margin-bottom: 30px;
}

.back-to-news i {
    margin-right: 8px;
    transition: transform 0.3s;
}

.back-to-news:hover i {
    transform: translateX(-5px);
}

/* 加载动画 */
.loading {
    display: none;
    text-align: center;
    padding: 40px 0;
}

.loading i {
    font-size: 2rem;
    color: var(--primary);
    animation: spin 1s linear infinite;
}

.loading p {
    margin-top: 15px;
    color: var(--gray);
}

.logos {
    width: 28px;
    height: 28px;
    margin-right: 5px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 页脚样式 */
footer {
    background: var(--dark);
    color: white;
    padding: 70px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 50px;
}

.footer-column h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: white;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: #d1d5db;
    text-decoration: none;
    transition: color 0.3s;
}

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

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: white;
    transition: background 0.3s, transform 0.3s;
}

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

.copyright {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #9ca3af;
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .news-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .page-header h1 {
        font-size: 2.2rem;
    }

    .section-title h2 {
        font-size: 2rem;
    }
    
    .news-article {
        padding: 25px;
    }
    
    .news-header h1 {
        font-size: 1.8rem;
    }
}

@media (max-width: 576px) {
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .news-filters {
        flex-direction: column;
        align-items: center;
    }
}