/* 四虎影院 - 外部样式表 */
/* 品牌主题：影视传媒公司+视频社区 */

/* CSS变量定义 */
:root {
    --primary-color: #FF6B9D;
    --secondary-color: #FF8A65;
    --accent-color: #9C27B0;
    --dark-bg: #1a1a2e;
    --light-bg: #f8f9fa;
    --text-dark: #333333;
    --text-light: #ffffff;
    --gradient-primary: linear-gradient(135deg, #FF6B9D 0%, #FF8A65 100%);
    --gradient-dark: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    --shadow-soft: 0 4px 20px rgba(0,0,0,0.1);
    --shadow-hover: 0 8px 30px rgba(255,107,157,0.3);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

/* 全局重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--light-bg);
}

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

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

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

/* 头部导航 */
.header {
    background: var(--gradient-dark);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    box-shadow: var(--shadow-soft);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

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

.logo img {
    height: 45px;
    width: auto;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-light);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 导航菜单 */
.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-menu a {
    color: var(--text-light);
    font-size: 1rem;
    font-weight: 500;
    padding: 8px 0;
    position: relative;
}

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

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

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

/* 搜索框 */
.search-box {
    background: rgba(255,255,255,0.1);
    border-radius: 25px;
    padding: 8px 15px;
    display: flex;
    align-items: center;
    gap: 10px;
    max-width: 250px;
}

.search-box input {
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-light);
    font-size: 0.9rem;
    width: 150px;
}

.search-box input::placeholder {
    color: rgba(255,255,255,0.6);
}

.search-box button {
    background: var(--gradient-primary);
    border: none;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-light);
    font-size: 1.5rem;
    cursor: pointer;
}

/* 轮播区域 */
.hero-section {
    margin-top: 80px;
    position: relative;
    overflow: hidden;
}

.banner-slider {
    position: relative;
    height: 500px;
}

.banner-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.8s ease;
}

.banner-slide.active {
    opacity: 1;
}

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

.banner-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to right, rgba(26,26,46,0.8) 0%, rgba(26,26,46,0.3) 100%);
    display: flex;
    align-items: center;
}

.banner-content {
    max-width: 600px;
    padding: 0 50px;
    color: var(--text-light);
}

.banner-content h1 {
    font-size: 2.8rem;
    margin-bottom: 20px;
    line-height: 1.3;
}

.banner-content p {
    font-size: 1.1rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.btn-primary {
    display: inline-block;
    background: var(--gradient-primary);
    color: var(--text-light);
    padding: 14px 35px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

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

.btn-secondary {
    display: inline-block;
    background: transparent;
    color: var(--text-light);
    padding: 12px 30px;
    border-radius: 30px;
    font-weight: 600;
    border: 2px solid var(--primary-color);
    margin-left: 15px;
    transition: var(--transition);
}

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

/* 轮播指示器 */
.banner-dots {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
}

.banner-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255,255,255,0.5);
    cursor: pointer;
    transition: var(--transition);
}

.banner-dots span.active {
    background: var(--primary-color);
    width: 30px;
    border-radius: 6px;
}

/* 通用区块标题 */
.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 2.2rem;
    color: var(--text-dark);
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.section-title p {
    color: #666;
    font-size: 1.1rem;
    max-width: 600px;
    margin: 20px auto 0;
}

/* 视频卡片网格 */
.video-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
    padding: 20px 0;
}

.video-card {
    background: #fff;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-soft);
    transition: var(--transition);
    position: relative;
}

.video-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}

.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: var(--transition);
}

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

.play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0);
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    opacity: 0;
}

.video-card:hover .play-btn {
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
}

.play-btn::after {
    content: '';
    width: 0;
    height: 0;
    border-left: 18px solid #fff;
    border-top: 12px solid transparent;
    border-bottom: 12px solid transparent;
    margin-left: 4px;
}

.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: 0.8rem;
}

.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;
    align-items: center;
    gap: 15px;
    color: #888;
    font-size: 0.85rem;
}

.video-meta span {
    display: flex;
    align-items: center;
    gap: 5px;
}

/* 分类标签 */
.category-tabs {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.category-tab {
    padding: 10px 25px;
    background: #fff;
    border: 2px solid #eee;
    border-radius: 25px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

.category-tab:hover,
.category-tab.active {
    background: var(--gradient-primary);
    color: #fff;
    border-color: transparent;
}

/* 影视传媒模块 */
.media-section {
    padding: 80px 0;
    background: #fff;
}

.media-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.media-card {
    text-align: center;
    padding: 40px 30px;
    background: var(--light-bg);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.media-card:hover {
    background: var(--gradient-primary);
    color: #fff;
    transform: translateY(-5px);
}

.media-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 2rem;
    color: #fff;
    transition: var(--transition);
}

.media-card:hover .media-icon {
    background: #fff;
    color: var(--primary-color);
}

.media-card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
}

.media-card p {
    font-size: 0.95rem;
    opacity: 0.8;
}

/* 专家展示 */
.experts-section {
    padding: 80px 0;
    background: var(--gradient-dark);
    color: var(--text-light);
}

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

.expert-card {
    background: rgba(255,255,255,0.1);
    border-radius: var(--border-radius);
    padding: 30px;
    text-align: center;
    transition: var(--transition);
}

.expert-card:hover {
    background: rgba(255,255,255,0.15);
    transform: translateY(-5px);
}

.expert-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    overflow: hidden;
    margin: 0 auto 20px;
    border: 3px solid var(--primary-color);
}

.expert-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.expert-card h3 {
    font-size: 1.2rem;
    margin-bottom: 8px;
}

.expert-card .title {
    color: var(--primary-color);
    font-size: 0.9rem;
    margin-bottom: 15px;
}

.expert-card p {
    font-size: 0.9rem;
    opacity: 0.8;
    margin-bottom: 20px;
}

.expert-links {
    display: flex;
    justify-content: center;
    gap: 10px;
}

.expert-links a {
    padding: 8px 15px;
    background: var(--gradient-primary);
    border-radius: 20px;
    font-size: 0.85rem;
    transition: var(--transition);
}

.expert-links a:hover {
    transform: scale(1.05);
}

/* 社区功能 */
.community-section {
    padding: 80px 0;
    background: #fff;
}

.community-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    align-items: center;
}

.community-image img {
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-soft);
}

.community-content h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.community-content p {
    margin-bottom: 25px;
    color: #666;
}

.feature-list {
    list-style: none;
}

.feature-list li {
    padding: 12px 0;
    display: flex;
    align-items: center;
    gap: 15px;
    border-bottom: 1px solid #eee;
}

.feature-list li:last-child {
    border-bottom: none;
}

.feature-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    flex-shrink: 0;
}

/* 用户评价 */
.reviews-section {
    padding: 80px 0;
    background: var(--light-bg);
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.review-card {
    background: #fff;
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-soft);
}

.review-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.review-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    overflow: hidden;
}

.review-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.review-user h4 {
    font-size: 1rem;
    margin-bottom: 5px;
}

.review-stars {
    color: #FFD700;
}

.review-card p {
    color: #666;
    font-size: 0.95rem;
    line-height: 1.7;
}

/* 合作品牌 */
.partners-section {
    padding: 60px 0;
    background: #fff;
}

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

.partner-logo {
    opacity: 0.6;
    transition: var(--transition);
    filter: grayscale(100%);
}

.partner-logo:hover {
    opacity: 1;
    filter: grayscale(0%);
}

/* 联系我们 */
.contact-section {
    padding: 80px 0;
    background: var(--gradient-dark);
    color: var(--text-light);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.contact-card {
    text-align: center;
}

.contact-card h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.contact-card p {
    margin-bottom: 10px;
    opacity: 0.9;
}

.qr-code {
    width: 150px;
    height: 150px;
    margin: 20px auto;
    background: #fff;
    border-radius: 10px;
    padding: 10px;
}

.qr-code img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* 页脚 */
.footer {
    background: #0d0d1a;
    color: var(--text-light);
    padding: 60px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand .logo {
    margin-bottom: 20px;
}

.footer-brand p {
    opacity: 0.7;
    font-size: 0.95rem;
    margin-bottom: 20px;
}

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

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

.social-links a:hover {
    background: var(--gradient-primary);
}

.footer-links h4 {
    font-size: 1.1rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

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

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

.footer-links a {
    opacity: 0.7;
    transition: var(--transition);
}

.footer-links a:hover {
    opacity: 1;
    color: var(--primary-color);
}

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

.footer-bottom p {
    opacity: 0.6;
    font-size: 0.9rem;
}

.update-time {
    margin-top: 10px;
    font-size: 0.85rem;
    opacity: 0.5;
}

/* 面包屑导航 */
.breadcrumb {
    padding: 20px 0;
    background: #fff;
    margin-top: 80px;
}

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

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

.breadcrumb-list a:hover {
    color: var(--primary-color);
}

.breadcrumb-list .current {
    color: var(--primary-color);
}

/* 内页头部 */
.page-header {
    background: var(--gradient-dark);
    padding: 100px 0 60px;
    margin-top: 80px;
    text-align: center;
    color: var(--text-light);
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.page-header p {
    font-size: 1.1rem;
    opacity: 0.8;
    max-width: 600px;
    margin: 0 auto;
}

/* FAQ区块 */
.faq-section {
    padding: 80px 0;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: #fff;
    border-radius: var(--border-radius);
    margin-bottom: 15px;
    box-shadow: var(--shadow-soft);
    overflow: hidden;
}

.faq-question {
    padding: 20px 25px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
}

.faq-answer {
    padding: 0 25px 20px;
    color: #666;
    display: none;
}

.faq-item.active .faq-answer {
    display: block;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .video-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .experts-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--dark-bg);
        flex-direction: column;
        padding: 20px;
        gap: 15px;
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .search-box {
        display: none;
    }
    
    .banner-slider {
        height: 400px;
    }
    
    .banner-content h1 {
        font-size: 2rem;
    }
    
    .video-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .media-grid {
        grid-template-columns: 1fr;
    }
    
    .community-features {
        grid-template-columns: 1fr;
    }
    
    .reviews-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .social-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .video-grid {
        grid-template-columns: 1fr;
    }
    
    .experts-grid {
        grid-template-columns: 1fr;
    }
    
    .banner-slider {
        height: 300px;
    }
    
    .banner-content {
        padding: 0 20px;
    }
    
    .banner-content h1 {
        font-size: 1.5rem;
    }
    
    .section-title h2 {
        font-size: 1.8rem;
    }
}

/* 懒加载图片占位 */
.lazy-load {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* 视频播放器样式 */
.video-player-wrapper {
    position: relative;
    padding-top: 56.25%;
    background: #000;
    border-radius: var(--border-radius);
    overflow: hidden;
}

.video-player-wrapper video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 工具卡片 */
.tool-card {
    background: #fff;
    border-radius: var(--border-radius);
    padding: 30px;
    text-align: center;
    box-shadow: var(--shadow-soft);
    transition: var(--transition);
}

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

.tool-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 1.8rem;
    color: #fff;
}

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

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

/* 统计数据 */
.stats-section {
    padding: 60px 0;
    background: var(--gradient-primary);
    color: #fff;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    text-align: center;
}

.stat-item h3 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.stat-item p {
    font-size: 1rem;
    opacity: 0.9;
}

@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}


/* 面包屑导航样式 */
.breadcrumb {
    background: #f8f9fa;
    padding: 10px 0;
    font-size: 14px;
    margin-top: 80px;
}

.breadcrumb ol {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    margin: 0;
    padding: 0;
}

.breadcrumb li {
    display: flex;
    align-items: center;
}

.breadcrumb li::after {
    content: ">";
    margin: 0 8px;
    color: #999;
}

.breadcrumb li:last-child::after {
    display: none;
}

.breadcrumb a {
    color: #ff6b9d;
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

.breadcrumb span {
    color: #666;
}

/* 专家资质样式 */
.expert-card .credentials {
    font-size: 12px;
    color: #ff6b9d;
    margin: 5px 0;
    font-weight: 500;
}

.expert-card .contact-info {
    font-size: 12px;
    color: #888;
    margin: 8px 0;
}

/* 页脚增强样式 */
.footer-bottom p {
    margin: 5px 0;
    font-size: 13px;
}

.footer-bottom a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
}

.footer-bottom a:hover {
    color: #ff6b9d;
}

/* 面包屑导航后调整hero-section */
.breadcrumb + .hero-section {
    margin-top: 0;
}