/* 秘密研究所登录入口 - 主样式文件 */
/* 品牌：秘密研究所登录入口 | 域名：01212.hk */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

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

a:hover {
    color: #ff6b9d;
}

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

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

/* 头部导航 */
.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

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

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

.logo img {
    height: 50px;
    margin-right: 10px;
}

.logo h1 {
    color: #fff;
    font-size: 1.5rem;
    font-weight: bold;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 25px;
}

.nav-menu li a {
    color: #fff;
    font-size: 1rem;
    padding: 8px 15px;
    border-radius: 20px;
    transition: all 0.3s ease;
}

.nav-menu li a:hover,
.nav-menu li a.active {
    background: rgba(255,255,255,0.2);
    color: #fff;
}

/* 搜索框 */
.search-bar {
    background: rgba(255,255,255,0.1);
    padding: 15px 0;
}

.search-form {
    display: flex;
    justify-content: center;
    gap: 10px;
}

.search-input {
    width: 400px;
    max-width: 100%;
    padding: 12px 20px;
    border: none;
    border-radius: 25px;
    font-size: 1rem;
    outline: none;
}

.search-btn {
    padding: 12px 30px;
    background: linear-gradient(135deg, #ff6b9d 0%, #c44569 100%);
    color: #fff;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    font-size: 1rem;
    transition: transform 0.3s ease;
}

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

/* Banner轮播 */
.banner {
    position: relative;
    overflow: hidden;
    height: 400px;
}

.banner-slide {
    position: absolute;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.5s ease;
}

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

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

.banner-content {
    position: absolute;
    bottom: 50px;
    left: 50px;
    color: #fff;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}

.banner-content h2 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.banner-content p {
    font-size: 1.2rem;
}

/* 区块标题 */
.section-title {
    text-align: center;
    padding: 40px 0 30px;
}

.section-title h2 {
    font-size: 2rem;
    color: #333;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

/* 视频卡片网格 */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
    padding: 20px 0;
}

.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;
}

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

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

.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: 0.85rem;
}

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

/* 专家展示 */
.expert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 30px;
    padding: 20px 0;
}

.expert-card {
    background: #fff;
    border-radius: 12px;
    padding: 30px 20px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

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

.expert-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    margin: 0 auto 20px;
    overflow: hidden;
    border: 4px solid #667eea;
}

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

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

.expert-card .title {
    color: #667eea;
    font-size: 0.9rem;
    margin-bottom: 15px;
}

.expert-card .desc {
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 20px;
}

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

.btn {
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    border: none;
}

.btn-outline {
    background: transparent;
    color: #667eea;
    border: 1px solid #667eea;
}

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

/* 合作品牌 */
.partner-logos {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 30px;
    padding: 30px 0;
}

.partner-logos img {
    height: 60px;
    filter: grayscale(100%);
    opacity: 0.6;
    transition: all 0.3s ease;
}

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

/* FAQ */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px 0;
}

.faq-item {
    background: #fff;
    border-radius: 10px;
    margin-bottom: 15px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

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

.faq-question::after {
    content: '+';
    font-size: 1.5rem;
    color: #667eea;
}

.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;
}

/* 用户评价 */
.review-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 25px;
    padding: 20px 0;
}

.review-card {
    background: #fff;
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

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

.review-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: bold;
}

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

.review-stars {
    color: #ffc107;
}

.review-content {
    color: #666;
    line-height: 1.8;
}

/* 联系我们 */
.contact-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 60px 0;
    color: #fff;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.contact-item h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid rgba(255,255,255,0.3);
}

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

.qr-codes {
    display: flex;
    gap: 20px;
    margin-top: 15px;
}

.qr-code {
    text-align: center;
}

.qr-code img {
    width: 100px;
    height: 100px;
    border-radius: 8px;
    background: #fff;
    padding: 5px;
}

.qr-code p {
    margin-top: 8px;
    font-size: 0.85rem;
}

/* 页脚 */
.footer {
    background: #1a1a2e;
    color: #fff;
    padding: 40px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.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: rgba(255,255,255,0.7);
    transition: color 0.3s ease;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

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

.social-share {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 15px;
}

.social-share a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    transition: all 0.3s ease;
}

.social-share a:hover {
    background: #ff6b9d;
    transform: translateY(-3px);
}

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

.breadcrumb-list {
    display: flex;
    list-style: none;
    gap: 10px;
}

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

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

.breadcrumb-list li a {
    color: #667eea;
}

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

/* 分类标签 */
.category-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    padding: 20px 0;
    justify-content: center;
}

.category-tab {
    padding: 10px 25px;
    background: #fff;
    border-radius: 25px;
    color: #666;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 1px solid #eee;
}

.category-tab:hover,
.category-tab.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    border-color: transparent;
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 10px;
    padding: 40px 0;
}

.pagination a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #fff;
    border-radius: 8px;
    color: #666;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.pagination a:hover,
.pagination a.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header-inner {
        flex-direction: column;
        gap: 15px;
    }
    
    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
        gap: 10px;
    }
    
    .nav-menu li a {
        padding: 6px 12px;
        font-size: 0.9rem;
    }
    
    .search-input {
        width: 100%;
    }
    
    .search-form {
        flex-direction: column;
        padding: 0 15px;
    }
    
    .banner {
        height: 250px;
    }
    
    .banner-content {
        left: 20px;
        bottom: 30px;
    }
    
    .banner-content h2 {
        font-size: 1.5rem;
    }
    
    .section-title h2 {
        font-size: 1.5rem;
    }
    
    .video-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
    
    .expert-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

/* 懒加载占位 */
.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;
    }
}

/* 内页样式 */
.page-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 60px 0;
    text-align: center;
    color: #fff;
}

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

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

.page-content {
    padding: 40px 0;
    background: #fff;
    min-height: 60vh;
}

/* 工具卡片 */
.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 25px;
    padding: 20px 0;
}

.tool-card {
    background: #fff;
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
    border: 2px solid transparent;
}

.tool-card:hover {
    transform: translateY(-5px);
    border-color: #667eea;
}

.tool-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: #fff;
}

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

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

/* 社区帖子 */
.post-list {
    max-width: 800px;
    margin: 0 auto;
}

.post-item {
    background: #fff;
    border-radius: 12px;
    padding: 25px;
    margin-bottom: 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

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

.post-avatar {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: linear-gradient(135deg, #ff6b9d 0%, #c44569 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: bold;
}

.post-user h4 {
    font-size: 1rem;
}

.post-time {
    color: #999;
    font-size: 0.85rem;
}

.post-content {
    line-height: 1.8;
    margin-bottom: 15px;
}

.post-actions {
    display: flex;
    gap: 20px;
    color: #999;
    font-size: 0.9rem;
}

.post-actions span {
    cursor: pointer;
    transition: color 0.3s ease;
}

.post-actions span:hover {
    color: #ff6b9d;
}

/* 更新时间 */
.update-time {
    text-align: center;
    padding: 10px;
    color: #999;
    font-size: 0.85rem;
}