/* 基础样式设置 */
:root {
    --primary: #0f3460;
    --primary-light: #1a508b;
    --secondary: #e94560;
    --text-dark: #1a1a2e;
    --text-gray: #4a4a68;
    --light-gray: #f0f2f5;
    --white: #ffffff;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    line-height: 1.65;
    color: var(--text-dark);
    background-color: var(--light-gray);
}

.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* 通用样式 */
a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

img {
    width: 100%;
    display: block;
    object-fit: cover;
}

.btn {
    display: inline-block;
    padding: 0.6rem 1.2rem;
    background-color: var(--primary);
    color: var(--white);
    border-radius: 4px;
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.btn:hover {
    background-color: var(--primary-light);
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background-color: #d13a50;
}

.section {
    padding: 4rem 0;
}

.section-title {
    font-size: 2rem;
    margin-bottom: 2.5rem;
    color: var(--primary);
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -8px;
    width: 60px;
    height: 3px;
    background-color: var(--secondary);
}

/* 头部导航 */
header {
    background-color: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.logo i {
    color: var(--secondary);
    font-size: 1.8rem;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    font-weight: 500;
    color: var(--text-dark);
    padding: 0.5rem 0;
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--secondary);
    transition: var(--transition);
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-links a.active {
    color: var(--secondary);
}

.nav-links a.active::after {
    width: 100%;
}

.search-bar {
    position: relative;
}

.search-bar input {
    padding: 0.6rem 1rem 0.6rem 2.5rem;
    border: 1px solid #ddd;
    border-radius: 30px;
    outline: none;
    transition: var(--transition);
    width: 220px;
}

.search-bar input:focus {
    width: 260px;
    border-color: var(--primary-light);
    box-shadow: 0 0 0 2px rgba(26, 80, 139, 0.1);
}

.search-bar i {
    position: absolute;
    left: 0.8rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-gray);
}

.menu-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* 首页特色区域 */
.hero {
    padding: 5rem 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: url('https://picsum.photos/800/600?random=10') no-repeat center center;
    background-size: cover;
    opacity: 0.2;
    z-index: 1;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    position: relative;
    z-index: 2;
}

.hero-content {
    max-width: 550px;
}

.hero-category {
    display: inline-block;
    background-color: var(--secondary);
    padding: 0.3rem 0.8rem;
    border-radius: 30px;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 1.2rem;
}

.hero-title {
    font-size: 2.8rem;
    line-height: 1.25;
    margin-bottom: 1.5rem;
}

.hero-text {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 2rem;
    max-width: 450px;
}

/* 热门新闻 */
.trending-news {
    background-color: var(--white);
}

.trending-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2.5rem;
}

.news-card {
    background-color: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.news-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 20px rgba(0, 0, 0, 0.1);
}

.card-img {
    height: 200px;
    overflow: hidden;
}

.card-img img {
    transition: transform 0.5s ease;
    height: 100%;
}

.news-card:hover .card-img img {
    transform: scale(1.08);
}

.card-content {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.card-category {
    display: inline-block;
    color: var(--secondary);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 0.8rem;
}

.card-title {
    font-size: 1.4rem;
    margin-bottom: 0.8rem;
    line-height: 1.3;
    color: var(--primary);
    flex: 1;
}

.card-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--text-gray);
    margin-bottom: 1.2rem;
}

/* 编辑推荐 */
.editor-picks {
    background-color: var(--light-gray);
}

.picks-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 2.5rem;
}

.featured-pick {
    background-color: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    display: grid;
    grid-template-columns: 1fr 1fr;
    height: 100%;
}

.featured-img {
    height: 100%;
}

.side-picks {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.side-pick {
    display: flex;
    gap: 1rem;
    background-color: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.side-pick:hover {
    transform: translateX(5px);
}

.side-pick-img {
    width: 120px;
    height: 100%;
    flex-shrink: 0;
}

.side-pick-content {
    padding: 1rem;
}

.side-pick-title {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--primary);
}

/* 分类导航 */
.category-nav {
    padding: 2rem 0;
    background-color: var(--white);
}

.categories {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.category-btn {
    padding: 0.8rem 1.8rem;
    background-color: var(--light-gray);
    border-radius: 30px;
    font-weight: 500;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

/* 列表页样式 */
.list-header {
    padding: 3rem 0;
    background-color: var(--primary);
    color: var(--white);
}

.list-title {
    font-size: 2.2rem;
    margin-bottom: 0.5rem;
}

.list-description {
    opacity: 0.9;
    max-width: 700px;
}

.filters {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 0;
    border-bottom: 1px solid #e0e0e0;
    margin-bottom: 2rem;
}

.filter-tags {
    display: flex;
    gap: 0.8rem;
    flex-wrap: wrap;
}

.filter-tag {
    padding: 0.5rem 1.2rem;
    background-color: var(--light-gray);
    border-radius: 30px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
}

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

.sort-by {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.sort-by select {
    padding: 0.5rem 1rem;
    border-radius: 4px;
    border: 1px solid #ddd;
    background-color: var(--white);
}

.news-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2.5rem;
    margin-bottom: 3rem;
}

.pagination {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
}

.page-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid #ddd;
    background-color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

.page-btn:hover:not(.active) {
    border-color: var(--primary);
    color: var(--primary);
}

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

/* 详情页样式 */
.news-detail {
    padding: 3rem 0;
}

.detail-container {
    display: grid;
    grid-template-columns: 3fr 1fr;
    gap: 2.5rem;
}

.detail-content {
    background-color: var(--white);
    border-radius: 8px;
    padding: 2.5rem;
    box-shadow: var(--shadow);
}

.detail-header {
    margin-bottom: 2rem;
}

.detail-meta {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-gray);
    font-size: 0.9rem;
}

.detail-meta span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.detail-title {
    font-size: 2.4rem;
    line-height: 1.3;
    margin-bottom: 1.5rem;
    color: var(--primary);
}

.detail-img {
    width: 100%;
    height: 500px;
    border-radius: 8px;
    margin-bottom: 2rem;
}

.detail-body {
    font-size: 1.1rem;
    color: var(--text-dark);
}

.detail-body p {
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.detail-body h3 {
    font-size: 1.5rem;
    margin: 2rem 0 1rem;
    color: var(--primary);
}

.detail-body blockquote {
    border-left: 4px solid var(--secondary);
    padding: 1rem 1.5rem;
    margin: 1.5rem 0;
    font-style: italic;
    background-color: var(--light-gray);
    border-radius: 0 4px 4px 0;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin: 2.5rem 0;
}

.tag {
    padding: 0.4rem 1rem;
    background-color: var(--light-gray);
    border-radius: 30px;
    font-size: 0.85rem;
    transition: var(--transition);
}

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

.share-buttons {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid #eee;
}

.share-text {
    font-weight: 600;
}

.share-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    transition: var(--transition);
}

.share-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.share-btn.facebook {
    background-color: #3b5998;
}

.share-btn.twitter {
    background-color: #1da1f2;
}

.share-btn.linkedin {
    background-color: #0077b5;
}

.share-btn.whatsapp {
    background-color: #25d366;
}

/* 侧边栏 */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.sidebar-widget {
    background-color: var(--white);
    border-radius: 8px;
    padding: 1.8rem;
    box-shadow: var(--shadow);
}

.widget-title {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    color: var(--primary);
    position: relative;
    padding-bottom: 0.8rem;
}

.widget-title::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 40px;
    height: 2px;
    background-color: var(--secondary);
}

.popular-news {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.popular-item {
    display: flex;
    gap: 1rem;
}

.popular-img {
    width: 90px;
    height: 90px;
    flex-shrink: 0;
    border-radius: 4px;
}

.popular-content {
    font-size: 0.95rem;
}

.popular-title {
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.popular-date {
    font-size: 0.8rem;
    color: var(--text-gray);
}

/* 页脚 */
footer {
    background-color: var(--primary);
    color: var(--white);
    padding: 5rem 0 2rem;
}

.footer-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-col h3 {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 0.8rem;
}

.footer-col h3::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 40px;
    height: 2px;
    background-color: var(--secondary);
}

.footer-about {
    margin-bottom: 1.5rem;
    opacity: 0.8;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-link {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.social-link:hover {
    background-color: var(--secondary);
    border-color: var(--secondary);
    transform: translateY(-3px);
}

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

.footer-links li {
    margin-bottom: 1rem;
}

.footer-links a {
    opacity: 0.8;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-links a:hover {
    opacity: 1;
    padding-left: 5px;
    color: var(--secondary);
}

.footer-contact {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    opacity: 0.8;
}

.contact-item i {
    margin-top: 4px;
    color: var(--secondary);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
    opacity: 0.7;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
    }
    
    .picks-container {
        grid-template-columns: 1fr;
    }
    
    .detail-container {
        grid-template-columns: 1fr;
    }
    
    .hero::before {
        width: 100%;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--white);
        flex-direction: column;
        padding: 1.5rem;
        gap: 1rem;
        box-shadow: 0 10px 10px rgba(0, 0, 0, 0.1);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .search-bar {
        display: none;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .featured-pick {
        grid-template-columns: 1fr;
    }
    
    .featured-img {
        height: 250px;
    }
    
    .detail-title {
        font-size: 1.8rem;
    }
    
    .detail-img {
        height: 300px;
    }
}

@media (max-width: 576px) {
    .section {
        padding: 2.5rem 0;
    }
    
    .section-title {
        font-size: 1.6rem;
    }
    
    .hero {
        padding: 3rem 0;
    }
    
    .hero-title {
        font-size: 1.8rem;
    }
    
    .trending-grid {
        grid-template-columns: 1fr;
    }
    
    .category-btn {
        padding: 0.6rem 1.2rem;
        font-size: 0.9rem;
    }
    
    .news-list {
        grid-template-columns: 1fr;
    }
    
    .detail-content {
        padding: 1.5rem;
    }
    
    .footer-container {
        grid-template-columns: 1fr;
    }
}