/* 基础样式设置 */
:root {
    --primary-color: #ff5e7d;
    --secondary-color: #7854f7;
    --accent-color: #3ae8ff;
    --text-color: #333333;
    --text-light: #777777;
    --bg-color: #ffffff;
    --bg-light: #f8f9fa;
    --border-color: #eeeeee;
    --gradient-primary: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    --gradient-secondary: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    --shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    --radius: 8px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--bg-color);
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: var(--transition);
}

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

ul {
    list-style: none;
}

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.section-padding {
    padding: 80px 0;
}

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

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

.section-header p {
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: var(--radius);
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

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

.primary-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
    color: white;
}

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

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

/* 头部样式 */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: white;
    box-shadow: var(--shadow);
    padding: 15px 0;
}

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

.logo-container {
    display: flex;
    align-items: center;
}

.logo-gradient {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--gradient-primary);
    margin-right: 15px;
}

.logo-container h1 {
    font-size: 1.8rem;
    color: var(--primary-color);
}

.main-nav ul {
    display: flex;
}

.main-nav ul li {
    margin-left: 20px;
}

.main-nav ul li a {
    font-weight: 500;
    color: var(--text-color);
    padding: 5px 10px;
    border-radius: var(--radius);
}

.main-nav ul li a:hover {
    color: var(--primary-color);
    background-color: var(--bg-light);
}

/* 横幅样式 */
.banner-section {
    padding: 100px 0;
    background-color: var(--bg-light);
}

.banner-gradient {
    background: var(--gradient-primary);
    border-radius: var(--radius);
    padding: 60px;
    color: white;
    text-align: center;
}

.banner-content h2 {
    font-size: 3rem;
    margin-bottom: 20px;
}

.banner-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.banner-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
}

/* 卡片样式 */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

.card {
    background-color: white;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.card-img-gradient {
    height: 200px;
    background: var(--gradient-secondary);
}

.card-content {
    padding: 20px;
}

.card-content h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: var(--primary-color);
}

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

.card-meta {
    display: flex;
    gap: 10px;
}

.card-meta span {
    background-color: var(--bg-light);
    color: var(--primary-color);
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
}

.featured-card .card-img-gradient {
    height: 250px;
}

.featured-card .card-desc {
    margin-top: 15px;
    font-size: 0.9rem;
}

/* 分类样式 */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
}

.category-item {
    background-color: white;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    text-align: center;
    padding: 20px;
    transition: var(--transition);
}

.category-item:hover {
    transform: translateY(-5px);
}

.category-gradient {
    height: 100px;
    background: var(--gradient-secondary);
    border-radius: var(--radius);
    margin-bottom: 15px;
}

.category-item h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.category-item p {
    font-size: 0.9rem;
    color: var(--text-light);
}

/* 排行榜样式 */
.ranking-tabs {
    background-color: white;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.tab-header {
    display: flex;
    background-color: var(--bg-light);
    border-bottom: 1px solid var(--border-color);
}

.tab-btn {
    padding: 15px 30px;
    background: none;
    border: none;
    cursor: pointer;
    font-weight: 600;
    color: var(--text-light);
    transition: var(--transition);
}

.tab-btn.active {
    color: var(--primary-color);
    border-bottom: 3px solid var(--primary-color);
}

.tab-content {
    display: none;
    padding: 30px;
}

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

.ranking-item {
    display: flex;
    align-items: center;
    padding: 15px 0;
    border-bottom: 1px solid var(--border-color);
}

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

.rank {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    width: 40px;
    text-align: center;
}

.rank-img-gradient {
    width: 60px;
    height: 60px;
    border-radius: var(--radius);
    background: var(--gradient-secondary);
    margin-right: 20px;
}

.rank-info {
    flex: 1;
}

.rank-info h3 {
    font-size: 1.1rem;
    margin-bottom: 5px;
}

.rank-meta span {
    background-color: var(--bg-light);
    color: var(--primary-color);
    padding: 3px 8px;
    border-radius: 20px;
    font-size: 0.8rem;
    margin-right: 5px;
}

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

/* 社区特性样式 */
.community-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.community-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.feature-item {
    background-color: white;
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.feature-item:hover {
    transform: translateY(-5px);
}

.feature-icon-gradient {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--gradient-primary);
    margin-bottom: 15px;
}

.feature-item h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.feature-item p {
    font-size: 0.9rem;
    color: var(--text-light);
}

.community-join {
    background-color: white;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.join-gradient {
    height: 150px;
    background: var(--gradient-primary);
}

.join-content {
    padding: 30px;
    text-align: center;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.join-content h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--primary-color);
}

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

/* 关于我们样式 */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-text p {
    margin-bottom: 20px;
}

.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.stat-item {
    background-color: white;
    border-radius: var(--radius);
    padding: 20px;
    text-align: center;
    box-shadow: var(--shadow);
}

.stat-gradient {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--gradient-secondary);
    margin: 0 auto 15px;
}

.stat-number {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.stat-label {
    color: var(--text-light);
}

/* 文章样式 */
.articles-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.article-item {
    background-color: white;
    border-radius: var(--radius);
    padding: 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.article-item:hover {
    transform: translateY(-5px);
}

.article-item h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.article-item p {
    color: var(--text-color);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* 页脚样式 */
.site-footer {
    background-color: #2c3e50;
    color: white;
    padding: 80px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 3fr;
    gap: 50px;
    margin-bottom: 50px;
}

.footer-logo-gradient {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--gradient-primary);
    margin-bottom: 20px;
}

.footer-logo h3 {
    font-size: 1.8rem;
    margin-bottom: 10px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.footer-links-column h4 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: var(--accent-color);
}

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

.footer-links-column ul li a {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 30px;
}

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

.footer-info p {
    margin-bottom: 5px;
    color: rgba(255, 255, 255, 0.7);
}
.footer-social {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

.social-icon {
    display: inline-block;
    width: 40px;
    height: 40px;
    line-height: 40px;
    text-align: center;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border-radius: 50%;
    transition: var(--transition);
}

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

.footer-copyright {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
}

.footer-copyright p {
    margin-bottom: 5px;
}

/* 渐变代替图片 */
.card-img-gradient {
    background: linear-gradient(45deg, #ff9a9e, #fad0c4);
}

.card:nth-child(2n) .card-img-gradient {
    background: linear-gradient(45deg, #a18cd1, #fbc2eb);
}

.card:nth-child(3n) .card-img-gradient {
    background: linear-gradient(45deg, #84fab0, #8fd3f4);
}

.card:nth-child(4n) .card-img-gradient {
    background: linear-gradient(45deg, #fccb90, #d57eeb);
}

.card:nth-child(5n) .card-img-gradient {
    background: linear-gradient(45deg, #f093fb, #f5576c);
}

.card:nth-child(6n) .card-img-gradient {
    background: linear-gradient(45deg, #4facfe, #00f2fe);
}

.category-gradient {
    background: linear-gradient(135deg, #43e97b, #38f9d7);
}

.category-item:nth-child(2n) .category-gradient {
    background: linear-gradient(135deg, #fa709a, #fee140);
}

.category-item:nth-child(3n) .category-gradient {
    background: linear-gradient(135deg, #667eea, #764ba2);
}

.category-item:nth-child(4n) .category-gradient {
    background: linear-gradient(135deg, #f6d365, #fda085);
}

.category-item:nth-child(5n) .category-gradient {
    background: linear-gradient(135deg, #5ee7df, #b490ca);
}

.category-item:nth-child(6n) .category-gradient {
    background: linear-gradient(135deg, #ffaa85, #b3315f);
}

.category-item:nth-child(7n) .category-gradient {
    background: linear-gradient(135deg, #c471f5, #fa71cd);
}

.category-item:nth-child(8n) .category-gradient {
    background: linear-gradient(135deg, #48c6ef, #6f86d6);
}

.rank-img-gradient {
    background: linear-gradient(45deg, #ff9a9e, #fad0c4);
}

.ranking-item:nth-child(2n) .rank-img-gradient {
    background: linear-gradient(45deg, #a18cd1, #fbc2eb);
}

.ranking-item:nth-child(3n) .rank-img-gradient {
    background: linear-gradient(45deg, #84fab0, #8fd3f4);
}

.ranking-item:nth-child(4n) .rank-img-gradient {
    background: linear-gradient(45deg, #fccb90, #d57eeb);
}

.ranking-item:nth-child(5n) .rank-img-gradient {
    background: linear-gradient(45deg, #f093fb, #f5576c);
}

.feature-icon-gradient:nth-child(1) {
    background: linear-gradient(45deg, #ff9a9e, #fad0c4);
}

.feature-icon-gradient:nth-child(2n) {
    background: linear-gradient(45deg, #a18cd1, #fbc2eb);
}

.feature-icon-gradient:nth-child(3n) {
    background: linear-gradient(45deg, #84fab0, #8fd3f4);
}

.feature-icon-gradient:nth-child(4n) {
    background: linear-gradient(45deg, #fccb90, #d57eeb);
}

.stat-gradient:nth-child(1) {
    background: linear-gradient(45deg, #ff9a9e, #fad0c4);
}

.stat-gradient:nth-child(2n) {
    background: linear-gradient(45deg, #a18cd1, #fbc2eb);
}

.stat-gradient:nth-child(3n) {
    background: linear-gradient(45deg, #84fab0, #8fd3f4);
}

.stat-gradient:nth-child(4n) {
    background: linear-gradient(45deg, #fccb90, #d57eeb);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .section-padding {
        padding: 60px 0;
    }
    
    .community-content {
        grid-template-columns: 1fr;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .banner-section {
        padding: 60px 0;
    }
    
    .banner-gradient {
        padding: 40px 20px;
    }
    
    .banner-content h2 {
        font-size: 2.2rem;
    }
    
    .community-features {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .articles-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    .site-header .container {
        flex-direction: column;
    }
    
    .logo-container {
        margin-bottom: 15px;
    }
    
    .main-nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .main-nav ul li {
        margin: 5px;
    }
    
    .banner-buttons {
        flex-direction: column;
        gap: 10px;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
}