/* 麻豆视频 - 原创样式表 */
/* 品牌色彩系统 */
:root {
    --primary-color: #FF6B9D;
    --secondary-color: #FF8E72;
    --accent-color: #FFB6C1;
    --dark-bg: #1a1a2e;
    --light-bg: #f8f9fa;
    --text-dark: #2d3436;
    --text-light: #636e72;
    --gradient-primary: linear-gradient(135deg, #FF6B9D 0%, #FF8E72 100%);
    --shadow-soft: 0 4px 20px rgba(255, 107, 157, 0.15);
    --shadow-hover: 0 8px 30px rgba(255, 107, 157, 0.25);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, 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;
}

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

/* 头部导航 */
.header {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

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

.logo img {
    height: 40px;
    width: auto;
}

.logo-text {
    font-size: 1.4rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-menu a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-dark);
    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,
.nav-menu a.active::after {
    width: 100%;
}

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

/* 搜索框 */
.search-bar {
    background: linear-gradient(135deg, #f8f9fa 0%, #fff 100%);
    padding: 15px 0;
    border-bottom: 1px solid #eee;
    margin-top: 64px;
}

.search-container {
    max-width: 600px;
    margin: 0 auto;
    position: relative;
}

.search-input {
    width: 100%;
    padding: 12px 50px 12px 20px;
    border: 2px solid #eee;
    border-radius: 30px;
    font-size: 0.95rem;
    outline: none;
    transition: var(--transition);
}

.search-input:focus {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-soft);
}

.search-btn {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--gradient-primary);
    border: none;
    padding: 8px 20px;
    border-radius: 20px;
    color: white;
    cursor: pointer;
    font-size: 0.9rem;
    transition: var(--transition);
}

.search-btn:hover {
    transform: translateY(-50%) scale(1.05);
    box-shadow: var(--shadow-hover);
}

/* 英雄区域 */
.hero {
    position: relative;
    height: 70vh;
    min-height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(135deg, var(--dark-bg) 0%, #16213e 100%);
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.4;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: white;
    padding: 20px;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 20px;
    text-shadow: 2px 2px 20px rgba(0, 0, 0, 0.3);
}

.hero h1 span {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto 30px;
}

.hero-btns {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

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

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

.btn-outline {
    background: transparent;
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.5);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: white;
}

/* 区块标题 */
.section {
    padding: 80px 0;
}

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

.section-header h2 {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.section-header h2 span {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

/* 视频卡片网格 */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 25px;
}

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

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

.video-thumb {
    position: relative;
    aspect-ratio: 16/9;
    overflow: hidden;
}

.video-thumb img {
    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;
    opacity: 0;
    transition: var(--transition);
}

.play-btn::after {
    content: '';
    width: 0;
    height: 0;
    border-left: 18px solid white;
    border-top: 11px solid transparent;
    border-bottom: 11px solid transparent;
    margin-left: 4px;
}

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

.video-duration {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
}

.video-info {
    padding: 18px;
}

.video-info h3 {
    font-size: 1rem;
    font-weight: 600;
    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: var(--text-light);
    font-size: 0.85rem;
}

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

/* 分类标签 */
.category-tabs {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.category-tab {
    padding: 10px 25px;
    border-radius: 25px;
    background: white;
    color: var(--text-dark);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

.category-tab:hover,
.category-tab.active {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-soft);
}

/* 特色模块 */
.features {
    background: linear-gradient(135deg, var(--dark-bg) 0%, #16213e 100%);
    color: white;
}

.features .section-header h2,
.features .section-header p {
    color: white;
}

.features .section-header h2 span {
    -webkit-text-fill-color: white;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
    padding: 30px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.feature-card:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-5px);
}

.feature-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;
}

.feature-card h3 {
    font-size: 1.2rem;
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 0.95rem;
    opacity: 0.8;
    line-height: 1.6;
}

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

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

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

.expert-avatar {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
}

.expert-info {
    padding: 25px;
    text-align: center;
}

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

.expert-info .title {
    color: var(--primary-color);
    font-size: 0.9rem;
    margin-bottom: 12px;
}

.expert-info p {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 15px;
}

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

.expert-btns .btn {
    padding: 8px 20px;
    font-size: 0.85rem;
}

/* 用户评价 */
.testimonials {
    background: linear-gradient(135deg, #fff5f7 0%, #fff 100%);
}

.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

.testimonial-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--shadow-soft);
}

.testimonial-card p {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-dark);
    margin-bottom: 20px;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 15px;
}

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

.testimonial-author h4 {
    font-size: 1rem;
    margin-bottom: 3px;
}

.testimonial-author span {
    color: var(--text-light);
    font-size: 0.85rem;
}

/* 合作伙伴 */
.partners {
    text-align: center;
}

.partner-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 40px;
    opacity: 0.7;
}

.partner-logos img {
    height: 50px;
    filter: grayscale(100%);
    transition: var(--transition);
}

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

/* 联系我们 */
.contact-section {
    background: white;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

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

.contact-card h3 {
    font-size: 1.1rem;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.contact-card img {
    width: 150px;
    height: 150px;
    margin-bottom: 15px;
    border-radius: 8px;
}

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

/* 页脚 */
.footer {
    background: var(--dark-bg);
    color: white;
    padding: 60px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand img {
    height: 45px;
    margin-bottom: 15px;
}

.footer-brand p {
    opacity: 0.7;
    font-size: 0.9rem;
    line-height: 1.7;
    margin-bottom: 20px;
}

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

.footer-social 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);
}

.footer-social a:hover {
    background: var(--primary-color);
}

.footer-links h4 {
    font-size: 1.1rem;
    margin-bottom: 20px;
}

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

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

.footer-links a {
    opacity: 0.7;
    font-size: 0.9rem;
}

.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;
    opacity: 0.7;
    font-size: 0.85rem;
}

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

/* 面包屑导航 */
.breadcrumb {
    padding: 15px 0;
    background: white;
    border-bottom: 1px solid #eee;
    margin-top: 64px;
}

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

.breadcrumb-list li::after {
    content: '/';
    margin-left: 10px;
    color: var(--text-light);
}

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

.breadcrumb-list a {
    color: var(--text-light);
}

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

.breadcrumb-list li:last-child {
    color: var(--primary-color);
}

/* 内页横幅 */
.page-banner {
    background: linear-gradient(135deg, var(--dark-bg) 0%, #16213e 100%);
    padding: 80px 0;
    text-align: center;
    color: white;
}

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

.page-banner p {
    opacity: 0.8;
    font-size: 1.1rem;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero {
        height: 60vh;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .section {
        padding: 50px 0;
    }
    
    .section-header h2 {
        font-size: 1.8rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-social {
        justify-content: center;
    }
    
    .video-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.6rem;
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 0.9rem;
    }
    
    .hero-btns {
        flex-direction: column;
        align-items: center;
    }
}

/* 懒加载占位 */
.lazy-load {
    opacity: 0;
    transition: opacity 0.3s ease;
}

.lazy-load.loaded {
    opacity: 1;
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
}

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    margin: 5px 0;
    border-radius: 2px;
    transition: var(--transition);
}

/* FAQ手风琴 */
.faq-item {
    background: white;
    border-radius: var(--border-radius);
    margin-bottom: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-soft);
}

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

.faq-question::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--primary-color);
}

.faq-item.active .faq-question::after {
    content: '-';
}

.faq-answer {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item.active .faq-answer {
    padding: 0 20px 20px;
    max-height: 500px;
}

/* 工具卡片 */
.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

.tool-card {
    background: white;
    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: 80px;
    height: 80px;
    background: linear-gradient(135deg, #fff5f7 0%, #ffe4e9 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 2rem;
}

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

.tool-card p {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 20px;
}

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

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

.stat-item h3 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 10px;
}

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

@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stat-item h3 {
        font-size: 2rem;
    }
}


/* 视频标签样式 */
.video-tag {
    position: absolute;
    top: 10px;
    left: 10px;
    background: var(--gradient-primary);
    color: white;
    padding: 3px 10px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
}

/* 专家资质样式 */
.expert-card .credential {
    color: var(--primary-color);
    font-size: 0.85rem;
    margin: 5px 0 10px;
    font-weight: 500;
}

/* 专家网格优化 - 4列 */
.expert-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
}

@media (max-width: 992px) {
    .expert-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .expert-grid {
        grid-template-columns: 1fr;
    }
}

/* 工具卡片网格 */
.tool-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
}

.tool-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 30px 25px;
    text-align: center;
    box-shadow: var(--shadow-soft);
    transition: var(--transition);
}

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

.tool-card .tool-icon {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.tool-card h3 {
    font-size: 1.1rem;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.tool-card p {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 20px;
    line-height: 1.6;
}

@media (max-width: 992px) {
    .tool-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .tool-grid {
        grid-template-columns: 1fr;
    }
}

/* 页面横幅优化 */
.page-banner {
    background: var(--gradient-primary);
    color: white;
    text-align: center;
    padding: 80px 20px;
    margin-top: 60px;
}

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

.page-banner p {
    font-size: 1.1rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

/* 时效性标识动画 */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.time-badge {
    animation: pulse 2s infinite;
}