/* 51每日大赛 - 全站样式表 */
/* 域名: znfu.cn */

/* ==================== 基础重置 ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background: #f5f5f5;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

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

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

/* ==================== 头部导航 ==================== */
.header {
    background: linear-gradient(135deg, #ff6b9d 0%, #c44569 100%);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo img {
    height: 45px;
    border-radius: 8px;
}

.logo-text {
    color: #fff;
    font-size: 1.5rem;
    font-weight: bold;
}

.nav {
    display: flex;
    gap: 25px;
    flex-wrap: wrap;
}

.nav a {
    color: #fff;
    font-weight: 500;
    padding: 8px 15px;
    border-radius: 20px;
    transition: all 0.3s ease;
}

.nav a:hover,
.nav a.active {
    background: rgba(255,255,255,0.2);
}

/* 搜索框 */
.search-box {
    display: flex;
    align-items: center;
    background: rgba(255,255,255,0.9);
    border-radius: 25px;
    padding: 5px 15px;
    margin-left: 20px;
}

.search-box input {
    border: none;
    outline: none;
    padding: 8px;
    width: 150px;
    background: transparent;
    font-size: 14px;
}

.search-box button {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 16px;
    color: #c44569;
}

/* ==================== 英雄区 ==================== */
.hero {
    background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5)), url('../images/hero-bg.jpg') center/cover;
    color: #fff;
    padding: 100px 0;
    text-align: center;
}

.hero h1 {
    font-size: 2.8rem;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.hero p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto 30px;
    opacity: 0.95;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 50px;
    margin-top: 40px;
    flex-wrap: wrap;
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: bold;
    color: #ffb6c1;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.9;
}

/* ==================== 通用区块 ==================== */
.section {
    padding: 60px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 40px;
}

.section-title h2 {
    font-size: 2rem;
    color: #333;
    margin-bottom: 10px;
}

.section-title p {
    color: #666;
    font-size: 1rem;
}

/* ==================== 视频卡片 ==================== */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
}

.video-card {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.video-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.video-thumb {
    position: relative;
    padding-top: 56.25%;
    overflow: hidden;
}

.video-thumb img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

.play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: rgba(255,107,157,0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.play-btn::after {
    content: '';
    border-style: solid;
    border-width: 10px 0 10px 18px;
    border-color: transparent transparent transparent #fff;
    margin-left: 4px;
}

.video-card:hover .play-btn {
    opacity: 1;
}

.video-duration {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background: rgba(0,0,0,0.7);
    color: #fff;
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 12px;
}

.video-info {
    padding: 15px;
}

.video-info h3 {
    font-size: 1rem;
    margin-bottom: 10px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-meta {
    display: flex;
    justify-content: space-between;
    color: #999;
    font-size: 0.85rem;
}

.video-stats {
    display: flex;
    gap: 15px;
}

.video-tag {
    display: inline-block;
    background: #fff0f5;
    color: #c44569;
    padding: 3px 10px;
    border-radius: 15px;
    font-size: 12px;
    margin-top: 10px;
}

/* ==================== 服务模块 ==================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 25px;
}

.service-card {
    background: #fff;
    padding: 30px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    transition: transform 0.3s ease;
}

.service-card:hover {
    transform: translateY(-5px);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.service-card h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: #333;
}

.service-card p {
    color: #666;
    font-size: 0.9rem;
}

/* ==================== 专家展示 ==================== */
.experts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

.expert-card {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    text-align: center;
}

.expert-photo {
    width: 100%;
    height: 280px;
    object-fit: cover;
}

.expert-info {
    padding: 20px;
}

.expert-info h3 {
    font-size: 1.2rem;
    margin-bottom: 5px;
}

.expert-title {
    color: #c44569;
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.expert-credentials {
    font-size: 0.85rem;
    color: #666;
    margin-bottom: 15px;
    line-height: 1.6;
}

.expert-social {
    display: flex;
    justify-content: center;
    gap: 15px;
}

.expert-social a {
    display: inline-block;
    padding: 5px 12px;
    background: #f5f5f5;
    border-radius: 15px;
    font-size: 12px;
    color: #666;
    transition: all 0.3s ease;
}

.expert-social a:hover {
    background: #ff6b9d;
    color: #fff;
}

/* ==================== 合作伙伴 ==================== */
.partners {
    background: #fff;
    padding: 40px 0;
}

.partners-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 50px;
    flex-wrap: wrap;
}

.partner-item {
    color: #999;
    font-size: 1.1rem;
    font-weight: 500;
}

/* ==================== 社区模块 ==================== */
.community-features {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
}

.community-feature {
    background: #fff;
    padding: 25px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
}

.community-feature .icon {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.community-feature h4 {
    font-size: 1rem;
    margin-bottom: 8px;
}

.community-feature p {
    color: #666;
    font-size: 0.85rem;
}

/* ==================== 弹幕展示 ==================== */
.danmu-container {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 40px 0;
    overflow: hidden;
    position: relative;
    min-height: 200px;
}

.danmu-item {
    position: absolute;
    white-space: nowrap;
    color: #fff;
    padding: 8px 15px;
    background: rgba(255,255,255,0.2);
    border-radius: 20px;
    font-size: 14px;
    animation: danmu-move 15s linear infinite;
}

@keyframes danmu-move {
    from { transform: translateX(100vw); }
    to { transform: translateX(-100%); }
}

/* ==================== 话题标签 ==================== */
.topic-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin-top: 20px;
}

.topic-tag {
    display: inline-block;
    padding: 8px 20px;
    background: linear-gradient(135deg, #ff6b9d 0%, #c44569 100%);
    color: #fff;
    border-radius: 25px;
    font-size: 14px;
    transition: transform 0.3s ease;
}

.topic-tag:hover {
    transform: scale(1.05);
}

/* ==================== 工具卡片 ==================== */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 25px;
}

.tool-card {
    background: #fff;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    transition: transform 0.3s ease;
}

.tool-card:hover {
    transform: translateY(-5px);
}

.tool-card h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: #333;
}

.tool-card p {
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 15px;
}

.tool-btn {
    display: inline-block;
    padding: 10px 25px;
    background: linear-gradient(135deg, #ff6b9d 0%, #c44569 100%);
    color: #fff;
    border-radius: 25px;
    font-size: 14px;
    transition: transform 0.3s ease;
}

.tool-btn:hover {
    transform: scale(1.05);
}

/* ==================== 用户评价 ==================== */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 25px;
}

.testimonial-card {
    background: #fff;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
}

.testimonial-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
}

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

.testimonial-name {
    font-weight: bold;
}

.testimonial-role {
    font-size: 0.85rem;
    color: #999;
}

.testimonial-content {
    color: #666;
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ==================== 页脚 ==================== */
.footer {
    background: #2d3436;
    color: #fff;
    padding: 50px 0 20px;
}

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

.footer-col h4 {
    font-size: 1.1rem;
    margin-bottom: 20px;
    color: #ff6b9d;
}

.footer-col ul {
    list-style: none;
}

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

.footer-col ul li a {
    color: #b2bec3;
    transition: color 0.3s ease;
}

.footer-col ul li a:hover {
    color: #ff6b9d;
}

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

.qrcode-item {
    text-align: center;
}

.qrcode-item img {
    width: 100px;
    height: 100px;
    border-radius: 8px;
    margin-bottom: 8px;
}

.qrcode-item p {
    font-size: 12px;
    color: #b2bec3;
}

.footer-bottom {
    border-top: 1px solid #444;
    padding-top: 20px;
    text-align: center;
    color: #b2bec3;
    font-size: 0.9rem;
}

/* ==================== 面包屑 ==================== */
.breadcrumb {
    padding: 15px 0;
    background: #fff;
    border-bottom: 1px solid #eee;
}

.breadcrumb-list {
    display: flex;
    gap: 10px;
    list-style: none;
    font-size: 0.9rem;
}

.breadcrumb-list li::after {
    content: '/';
    margin-left: 10px;
    color: #999;
}

.breadcrumb-list li:last-child::after {
    content: '';
}

.breadcrumb-list a {
    color: #666;
}

.breadcrumb-list a:hover {
    color: #c44569;
}

/* ==================== 页面Banner ==================== */
.page-banner {
    background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5)), url('../images/hero-bg.jpg') center/cover;
    color: #fff;
    padding: 60px 0;
    text-align: center;
}

.page-banner h1 {
    font-size: 2.2rem;
    margin-bottom: 10px;
}

.page-banner p {
    font-size: 1rem;
    opacity: 0.9;
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: 15px;
    }
    
    .nav {
        justify-content: center;
    }
    
    .search-box {
        margin-left: 0;
        margin-top: 10px;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero-stats {
        gap: 30px;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .section {
        padding: 40px 0;
    }
    
    .section-title h2 {
        font-size: 1.5rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-qrcode {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .video-grid {
        grid-template-columns: 1fr;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .experts-grid {
        grid-template-columns: 1fr;
    }
}


/* ==================== 联系专家按钮 ==================== */
.contact-expert-btn {
    display: inline-block;
    margin-top: 15px;
    padding: 8px 20px;
    background: linear-gradient(135deg, #ff6b9d, #c44569);
    color: #fff;
    border-radius: 20px;
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s ease;
}

.contact-expert-btn:hover {
    background: linear-gradient(135deg, #c44569, #ff6b9d);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(255, 107, 157, 0.4);
}