/* 糖心vlog - 外部CSS样式表 */
/* 域名: iebby.cn */

/* 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: #f8f9fa;
}

/* 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-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: #fff;
}

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

.logo-text {
    font-size: 24px;
    font-weight: bold;
}

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

.nav-menu a {
    color: #fff;
    text-decoration: none;
    font-size: 16px;
    padding: 8px 15px;
    border-radius: 20px;
    transition: all 0.3s ease;
}

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

/* 搜索框 */
.search-box {
    background: #fff;
    padding: 20px 0;
    border-bottom: 1px solid #eee;
}

.search-form {
    display: flex;
    max-width: 600px;
    margin: 0 auto;
}

.search-input {
    flex: 1;
    padding: 12px 20px;
    border: 2px solid #ff6b9d;
    border-right: none;
    border-radius: 25px 0 0 25px;
    font-size: 16px;
    outline: none;
}

.search-btn {
    padding: 12px 30px;
    background: linear-gradient(135deg, #ff6b9d 0%, #c44569 100%);
    color: #fff;
    border: none;
    border-radius: 0 25px 25px 0;
    cursor: pointer;
    font-size: 16px;
    transition: all 0.3s ease;
}

.search-btn:hover {
    background: linear-gradient(135deg, #c44569 0%, #ff6b9d 100%);
}

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

.breadcrumb-list {
    display: flex;
    list-style: none;
    font-size: 14px;
}

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

.breadcrumb-list li:not(:last-child)::after {
    content: '>';
    margin: 0 10px;
    color: #999;
}

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

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

/* Hero区域 */
.hero {
    background: linear-gradient(135deg, rgba(255,107,157,0.9) 0%, rgba(196,69,105,0.9) 100%), url('../images/hero-banner.jpg') center/cover;
    color: #fff;
    padding: 80px 0;
    text-align: center;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.hero p {
    font-size: 20px;
    margin-bottom: 30px;
    opacity: 0.9;
}

.hero-btn {
    display: inline-block;
    padding: 15px 40px;
    background: #fff;
    color: #ff6b9d;
    text-decoration: none;
    border-radius: 30px;
    font-size: 18px;
    font-weight: bold;
    transition: all 0.3s ease;
}

.hero-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

/* 通用Section */
.section {
    padding: 60px 0;
}

.section-light {
    background: #fff;
}

.section-gray {
    background: #f8f9fa;
}

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

.section-title h2 {
    font-size: 32px;
    color: #333;
    margin-bottom: 10px;
}

.section-title p {
    color: #666;
    font-size: 16px;
}

/* 功能卡片网格 */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

.feature-card {
    background: #fff;
    border-radius: 15px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.feature-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, #ff6b9d 0%, #c44569 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 30px;
    color: #fff;
}

.feature-card h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: #333;
}

.feature-card p {
    color: #666;
    font-size: 14px;
}

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

.video-card {
    background: #fff;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
    position: relative;
}

.video-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px 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);
}

.video-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: all 0.3s ease;
    cursor: pointer;
}

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

.video-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-badge {
    position: absolute;
    top: 10px;
    left: 10px;
    background: #ff6b9d;
    color: #fff;
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 12px;
    font-weight: bold;
}

.video-duration {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background: rgba(0,0,0,0.7);
    color: #fff;
    padding: 3px 8px;
    border-radius: 5px;
    font-size: 12px;
}

.video-info {
    padding: 20px;
}

.video-info h3 {
    font-size: 16px;
    margin-bottom: 10px;
    color: #333;
    line-height: 1.4;
}

.video-meta {
    display: flex;
    justify-content: space-between;
    color: #999;
    font-size: 13px;
}

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

.video-tags {
    display: flex;
    gap: 8px;
    margin-top: 10px;
    flex-wrap: wrap;
}

.video-tag {
    background: #f0f0f0;
    color: #666;
    padding: 3px 10px;
    border-radius: 10px;
    font-size: 12px;
}

/* 专家卡片 */
.expert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.expert-card {
    background: #fff;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    display: flex;
    gap: 20px;
    transition: all 0.3s ease;
}

.expert-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.expert-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid #ff6b9d;
}

.expert-info {
    flex: 1;
}

.expert-info h3 {
    font-size: 20px;
    margin-bottom: 5px;
    color: #333;
}

.expert-title {
    color: #ff6b9d;
    font-size: 14px;
    margin-bottom: 10px;
}

.expert-desc {
    color: #666;
    font-size: 14px;
    margin-bottom: 15px;
}

.expert-credentials {
    font-size: 12px;
    color: #999;
    margin-bottom: 15px;
}

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

.expert-btn {
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 13px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.expert-btn-primary {
    background: #ff6b9d;
    color: #fff;
}

.expert-btn-secondary {
    background: #f0f0f0;
    color: #666;
}

.expert-btn:hover {
    transform: translateY(-2px);
}

/* 合作品牌 */
.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 30px;
    align-items: center;
}

.partner-logo {
    text-align: center;
    padding: 20px;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
}

.partner-logo:hover {
    transform: scale(1.05);
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.partner-logo span {
    font-size: 14px;
    color: #666;
    font-weight: bold;
}

/* 加入指南 */
.guide-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.guide-step {
    text-align: center;
    padding: 30px;
    background: #fff;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
}

.step-number {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #ff6b9d 0%, #c44569 100%);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: bold;
    margin: 0 auto 20px;
}

.guide-step h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: #333;
}

.guide-step p {
    color: #666;
    font-size: 14px;
}

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

.faq-item {
    background: #fff;
    border-radius: 10px;
    margin-bottom: 15px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.05);
    overflow: hidden;
}

.faq-question {
    padding: 20px;
    font-weight: bold;
    color: #333;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-question::after {
    content: '+';
    font-size: 24px;
    color: #ff6b9d;
}

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

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

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

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

.review-card {
    background: #fff;
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
}

.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, #ff6b9d 0%, #c44569 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 20px;
    font-weight: bold;
}

.review-user h4 {
    font-size: 16px;
    color: #333;
}

.review-user span {
    font-size: 12px;
    color: #999;
}

.review-stars {
    color: #ffc107;
    font-size: 16px;
    margin-bottom: 10px;
}

.review-content {
    color: #666;
    font-size: 14px;
    line-height: 1.6;
}

/* 分享按钮 */
.share-section {
    text-align: center;
    padding: 40px 0;
    background: #fff;
}

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

.share-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.share-btn:hover {
    transform: translateY(-3px);
}

.share-weixin {
    background: #07c160;
}

.share-weibo {
    background: #e6162d;
}

.share-douyin {
    background: #000;
}

.share-bilibili {
    background: #00a1d6;
}

.share-qq {
    background: #12b7f5;
}

/* 联系我们 */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.contact-card {
    background: #fff;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
}

.contact-card h3 {
    font-size: 20px;
    margin-bottom: 20px;
    color: #333;
    border-bottom: 2px solid #ff6b9d;
    padding-bottom: 10px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
    color: #666;
}

.contact-icon {
    width: 40px;
    height: 40px;
    background: #f0f0f0;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ff6b9d;
}

.qrcode-grid {
    display: flex;
    gap: 20px;
    justify-content: center;
}

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

.qrcode-item img {
    width: 120px;
    height: 120px;
    border-radius: 10px;
    margin-bottom: 10px;
}

.qrcode-item p {
    font-size: 14px;
    color: #666;
}

/* 页脚 */
.footer {
    background: linear-gradient(135deg, #2d3436 0%, #000 100%);
    color: #fff;
    padding: 50px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 30px;
}

.footer-section h4 {
    font-size: 18px;
    margin-bottom: 20px;
    color: #ff6b9d;
}

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

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

.footer-section ul a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
}

.footer-logo img {
    height: 40px;
}

.footer-desc {
    color: #999;
    font-size: 14px;
    line-height: 1.6;
}

.footer-bottom {
    border-top: 1px solid #444;
    padding-top: 20px;
    text-align: center;
    color: #999;
    font-size: 14px;
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 15px;
    }
    
    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
        gap: 10px;
    }
    
    .hero h1 {
        font-size: 32px;
    }
    
    .hero p {
        font-size: 16px;
    }
    
    .section-title h2 {
        font-size: 24px;
    }
    
    .expert-card {
        flex-direction: column;
        text-align: center;
    }
    
    .expert-btns {
        justify-content: center;
    }
    
    .search-form {
        flex-direction: column;
        gap: 10px;
    }
    
    .search-input,
    .search-btn {
        border-radius: 25px;
        border: 2px solid #ff6b9d;
    }
}

/* 懒加载图片 */
img[data-src] {
    opacity: 0;
    transition: opacity 0.3s ease;
}

img[data-src].loaded {
    opacity: 1;
}