/* 媚黑 - 原创CSS样式 */
/* 域名: wydkkcsb.cn */

/* ========== CSS变量定义 ========== */
:root {
    --primary-color: #FF6B9D;
    --secondary-color: #C44569;
    --accent-color: #9B59B6;
    --dark-color: #2C3E50;
    --light-color: #F8F9FA;
    --text-color: #333333;
    --text-light: #666666;
    --gradient-primary: linear-gradient(135deg, #FF6B9D 0%, #C44569 50%, #9B59B6 100%);
    --gradient-secondary: linear-gradient(45deg, #FF6B9D, #9B59B6);
    --shadow-light: 0 2px 10px rgba(0,0,0,0.1);
    --shadow-medium: 0 4px 20px rgba(0,0,0,0.15);
    --shadow-heavy: 0 8px 30px rgba(0,0,0,0.2);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

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

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

ul, ol {
    list-style: none;
}

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

.header.scrolled {
    background: rgba(255,255,255,0.95);
    box-shadow: var(--shadow-medium);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

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

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

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

.nav-menu {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-menu a {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-color);
    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, #f5f5f5 0%, #e8e8e8 100%);
    padding: 15px 0;
    border-bottom: 1px solid #eee;
    margin-top: 70px;
}

.search-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    gap: 10px;
}

.search-input {
    flex: 1;
    padding: 12px 20px;
    border: 2px solid transparent;
    border-radius: 25px;
    font-size: 1rem;
    background: white;
    transition: var(--transition);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(255,107,157,0.2);
}

.search-btn {
    padding: 12px 30px;
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: 25px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.search-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

/* ========== 移动端菜单 ========== */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background: var(--dark-color);
    border-radius: 2px;
    transition: var(--transition);
}

/* ========== Hero区域 ========== */
.hero {
    position: relative;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: var(--gradient-primary);
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: white;
    padding: 40px 20px;
    max-width: 900px;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.hero h2 {
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: 30px;
    opacity: 0.95;
}

.hero p {
    font-size: 1.1rem;
    margin-bottom: 40px;
    opacity: 0.9;
    line-height: 1.8;
}

.hero-btns {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

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

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

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

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

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

/* ========== 通用容器 ========== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 80px 0;
}

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

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 15px;
}

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

.section-header .highlight {
    color: var(--primary-color);
}

/* ========== 视频卡片网格 ========== */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 30px;
}

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

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

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

.video-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

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

.play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 70px;
    height: 70px;
    background: rgba(255,107,157,0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
    cursor: pointer;
}

.play-btn::after {
    content: '';
    width: 0;
    height: 0;
    border-left: 20px solid white;
    border-top: 12px solid transparent;
    border-bottom: 12px solid transparent;
    margin-left: 5px;
}

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

.video-duration {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background: rgba(0,0,0,0.7);
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.85rem;
}

.video-info {
    padding: 20px;
}

.video-info h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--dark-color);
    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: 0.9rem;
}

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

.video-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
}

.video-tag {
    background: linear-gradient(135deg, #fff0f5 0%, #f8e1e8 100%);
    color: var(--primary-color);
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 0.8rem;
}

/* ========== 关于我们 ========== */
.about-section {
    background: linear-gradient(135deg, #fff5f8 0%, #f8f0ff 100%);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-image {
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-heavy);
}

.about-content h3 {
    font-size: 2rem;
    color: var(--dark-color);
    margin-bottom: 20px;
}

.about-content p {
    color: var(--text-light);
    margin-bottom: 15px;
    line-height: 1.8;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 30px;
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-top: 5px;
}

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

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

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

.expert-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    overflow: hidden;
    margin: 0 auto 20px;
    border: 4px solid var(--primary-color);
}

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

.expert-card h4 {
    font-size: 1.3rem;
    color: var(--dark-color);
    margin-bottom: 5px;
}

.expert-title {
    color: var(--primary-color);
    font-size: 0.95rem;
    margin-bottom: 15px;
}

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

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

.expert-btn {
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition);
}

.expert-btn.primary {
    background: var(--gradient-primary);
    color: white;
    border: none;
}

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

/* ========== 功能模块 ========== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 35px 25px;
    text-align: center;
    box-shadow: var(--shadow-light);
    transition: var(--transition);
}

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

.feature-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: white;
}

.feature-card h4 {
    font-size: 1.2rem;
    color: var(--dark-color);
    margin-bottom: 10px;
}

.feature-card p {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ========== FAQ手风琴 ========== */
.faq-list {
    max-width: 900px;
    margin: 0 auto;
}

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

.faq-question {
    padding: 20px 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: var(--transition);
}

.faq-question:hover {
    background: #f9f9f9;
}

.faq-question h4 {
    font-size: 1.1rem;
    color: var(--dark-color);
    font-weight: 500;
}

.faq-icon {
    width: 30px;
    height: 30px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
    transition: var(--transition);
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

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

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

.faq-answer p {
    padding: 0 25px 20px;
    color: var(--text-light);
    line-height: 1.8;
}

/* ========== 用户评价 ========== */
.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
}

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

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

.review-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 1.2rem;
}

.review-info h5 {
    font-size: 1rem;
    color: var(--dark-color);
}

.review-stars {
    color: #FFD700;
    font-size: 0.9rem;
}

.review-text {
    color: var(--text-light);
    line-height: 1.7;
    font-style: italic;
}

/* ========== 联系我们 ========== */
.contact-section {
    background: var(--gradient-primary);
    color: white;
}

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

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

.contact-card {
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    padding: 30px;
    text-align: center;
}

.contact-card h4 {
    font-size: 1.2rem;
    margin-bottom: 15px;
}

.contact-card p {
    opacity: 0.9;
    line-height: 1.6;
}

.qrcode-container {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-top: 40px;
    flex-wrap: wrap;
}

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

.qrcode-item img {
    width: 150px;
    height: 150px;
    border-radius: 10px;
    margin-bottom: 10px;
    background: white;
    padding: 5px;
}

.qrcode-item p {
    font-size: 0.95rem;
}

/* ========== 页脚 ========== */
.footer {
    background: var(--dark-color);
    color: white;
    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 {
    color: rgba(255,255,255,0.7);
    line-height: 1.7;
}

.footer-links h5 {
    font-size: 1.1rem;
    margin-bottom: 20px;
    color: white;
}

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

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

.footer-links ul li a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-bottom p {
    color: rgba(255,255,255,0.6);
    font-size: 0.9rem;
}

.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;
    color: white;
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

/* ========== 面包屑导航 ========== */
.breadcrumb {
    padding: 15px 0;
    background: #f5f5f5;
    margin-top: 70px;
}

.breadcrumb-list {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
}

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

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

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

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

/* ========== 返回顶部 ========== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
    box-shadow: var(--shadow-medium);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
}

/* ========== 响应式设计 ========== */
@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 20px;
        gap: 15px;
        box-shadow: var(--shadow-medium);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero h2 {
        font-size: 1.2rem;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .video-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .reviews-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero {
        min-height: 500px;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .section {
        padding: 50px 0;
    }
    
    .btn {
        padding: 12px 25px;
        font-size: 0.9rem;
    }
    
    .search-container {
        flex-direction: column;
    }
    
    .search-btn {
        width: 100%;
    }
}

/* ========== 动画效果 ========== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease forwards;
}

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

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

/* ========== 内页样式 ========== */
.page-header {
    background: var(--gradient-primary);
    padding: 100px 0 60px;
    margin-top: 70px;
    text-align: center;
    color: white;
}

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

.page-header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

.page-content {
    padding: 60px 0;
}

.content-article {
    max-width: 900px;
    margin: 0 auto;
}

.content-article h2 {
    font-size: 1.8rem;
    color: var(--dark-color);
    margin: 40px 0 20px;
}

.content-article h3 {
    font-size: 1.4rem;
    color: var(--dark-color);
    margin: 30px 0 15px;
}

.content-article p {
    color: var(--text-light);
    line-height: 1.9;
    margin-bottom: 20px;
}

/* ========== 合作品牌 ========== */
.partners-section {
    background: #f9f9f9;
}

.partners-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 40px;
    align-items: center;
}

.partner-logo {
    width: 150px;
    height: 80px;
    background: white;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-light);
    padding: 15px;
    transition: var(--transition);
}

.partner-logo:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-medium);
}

/* ========== 分享按钮 ========== */
.share-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 30px;
}

.share-btn {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition);
}

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

.share-btn.wechat { background: #07C160; }
.share-btn.weibo { background: #E6162D; }
.share-btn.douyin { background: #000000; }
.share-btn.bilibili { background: #00A1D6; }