/* 糖心vlog 主样式表 */
/* 品牌色彩系统 */
:root {
    --primary-pink: #FF6B9D;
    --primary-coral: #FF8A65;
    --primary-gradient: linear-gradient(135deg, #FF6B9D 0%, #FF8A65 100%);
    --secondary-purple: #9C27B0;
    --text-dark: #333333;
    --text-light: #666666;
    --text-muted: #999999;
    --bg-light: #FAFAFA;
    --bg-white: #FFFFFF;
    --border-color: #EEEEEE;
    --shadow-light: 0 2px 10px rgba(0,0,0,0.08);
    --shadow-medium: 0 4px 20px rgba(0,0,0,0.12);
    --shadow-hover: 0 8px 30px rgba(255,107,157,0.25);
    --radius-small: 8px;
    --radius-medium: 12px;
    --radius-large: 20px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-light);
}

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

a:hover {
    color: var(--primary-pink);
}

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

ul, ol {
    list-style: none;
}

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

.container-fluid {
    width: 100%;
    padding: 0 20px;
}

/* 头部导航 */
.header {
    background: var(--bg-white);
    box-shadow: var(--shadow-light);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 0;
}

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

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

.logo-text {
    font-size: 24px;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-left: 10px;
}

/* 主导航 */
.main-nav {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    gap: 30px;
}

.nav-list li a {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-dark);
    padding: 8px 0;
    position: relative;
}

.nav-list li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-gradient);
    transition: width 0.3s ease;
}

.nav-list li a:hover::after,
.nav-list li a.active::after {
    width: 100%;
}

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

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* 搜索框 */
.search-bar {
    background: var(--bg-light);
    padding: 15px 0;
    border-bottom: 1px solid var(--border-color);
}

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

.search-input {
    flex: 1;
    padding: 12px 20px;
    border: 2px solid var(--border-color);
    border-right: none;
    border-radius: var(--radius-medium) 0 0 var(--radius-medium);
    font-size: 15px;
    outline: none;
    transition: border-color 0.3s ease;
}

.search-input:focus {
    border-color: var(--primary-pink);
}

.search-btn {
    padding: 12px 25px;
    background: var(--primary-gradient);
    border: none;
    border-radius: 0 var(--radius-medium) var(--radius-medium) 0;
    color: white;
    font-size: 15px;
    cursor: pointer;
    transition: opacity 0.3s ease;
}

.search-btn:hover {
    opacity: 0.9;
}

/* Hero区域 */
.hero {
    background: var(--primary-gradient);
    color: white;
    padding: 80px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('../images/hero-banner.jpg') center/cover;
    opacity: 0.2;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 20px;
}

.hero h2 {
    font-size: 24px;
    font-weight: 400;
    opacity: 0.9;
    margin-bottom: 30px;
}

.hero-desc {
    font-size: 18px;
    max-width: 700px;
    margin: 0 auto 40px;
    opacity: 0.85;
}

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

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 14px 35px;
    border-radius: var(--radius-medium);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

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

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

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

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

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

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

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

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

.section-header h2 {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.section-header h3 {
    font-size: 28px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.section-header p {
    font-size: 16px;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

.section-bg {
    background: var(--bg-white);
}

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

.video-card {
    background: var(--bg-white);
    border-radius: var(--radius-medium);
    overflow: hidden;
    box-shadow: var(--shadow-light);
    transition: all 0.3s ease;
}

.video-card:hover {
    transform: translateY(-5px);
    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: 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(255,255,255,0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all 0.3s ease;
}

.play-btn::after {
    content: '';
    width: 0;
    height: 0;
    border-left: 18px solid var(--primary-pink);
    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: 3px 8px;
    border-radius: 4px;
    font-size: 12px;
}

.video-info {
    padding: 15px;
}

.video-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-meta {
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 13px;
    color: var(--text-muted);
}

.video-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

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

.video-tag {
    background: var(--bg-light);
    color: var(--text-light);
    padding: 4px 10px;
    border-radius: 15px;
    font-size: 12px;
}

/* 分类模块 */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
}

.category-card {
    background: var(--bg-white);
    border-radius: var(--radius-medium);
    padding: 30px 20px;
    text-align: center;
    box-shadow: var(--shadow-light);
    transition: all 0.3s ease;
}

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

.category-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 15px;
    font-size: 28px;
}

.category-card h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.category-card p {
    font-size: 14px;
    color: var(--text-muted);
}

/* 专家团队 */
.expert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 30px;
}

.expert-card {
    background: var(--bg-white);
    border-radius: var(--radius-medium);
    overflow: hidden;
    box-shadow: var(--shadow-light);
    text-align: center;
    transition: all 0.3s ease;
}

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

.expert-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    margin: 25px auto 15px;
    border: 4px solid var(--bg-light);
}

.expert-info {
    padding: 0 20px 25px;
}

.expert-name {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 5px;
}

.expert-title {
    font-size: 14px;
    color: var(--primary-pink);
    margin-bottom: 10px;
}

.expert-desc {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 15px;
}

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

.expert-social a {
    width: 35px;
    height: 35px;
    background: var(--bg-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    transition: all 0.3s ease;
}

.expert-social a:hover {
    background: var(--primary-gradient);
    color: white;
}

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

.review-card {
    background: var(--bg-white);
    border-radius: var(--radius-medium);
    padding: 25px;
    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%;
    object-fit: cover;
}

.review-user h5 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
}

.review-user span {
    font-size: 13px;
    color: var(--text-muted);
}

.review-stars {
    color: #FFB800;
    font-size: 14px;
    margin-bottom: 10px;
}

.review-text {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}

/* 合作品牌 */
.partner-logos {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 40px;
    align-items: center;
}

.partner-logos img {
    height: 50px;
    opacity: 0.6;
    filter: grayscale(100%);
    transition: all 0.3s ease;
}

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

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

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

.faq-question {
    padding: 20px 25px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-question::after {
    content: '+';
    font-size: 24px;
    color: var(--primary-pink);
}

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

.faq-answer {
    padding: 0 25px 20px;
    font-size: 15px;
    color: var(--text-light);
    display: none;
}

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

/* 联系我们 */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 30px;
}

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

.contact-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 15px;
    color: white;
    font-size: 24px;
}

.contact-card h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.contact-card p {
    font-size: 14px;
    color: var(--text-light);
}

/* 二维码区域 */
.qrcode-section {
    display: flex;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
    margin-top: 40px;
}

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

.qrcode-item img {
    width: 150px;
    height: 150px;
    border-radius: var(--radius-small);
    margin-bottom: 10px;
}

.qrcode-item p {
    font-size: 14px;
    color: var(--text-light);
}

/* 页脚 */
.footer {
    background: #2D2D2D;
    color: #CCCCCC;
    padding: 60px 0 30px;
}

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

.footer-brand .logo-text {
    font-size: 28px;
    margin-bottom: 15px;
}

.footer-brand p {
    font-size: 14px;
    line-height: 1.8;
    margin-bottom: 20px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.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;
    color: #CCCCCC;
    transition: all 0.3s ease;
}

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

.footer-links h4 {
    font-size: 18px;
    font-weight: 600;
    color: white;
    margin-bottom: 20px;
}

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

.footer-links ul li a {
    font-size: 14px;
    color: #AAAAAA;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.footer-bottom p {
    font-size: 14px;
    color: #888888;
}

.footer-bottom .update-time {
    font-size: 13px;
    color: #888888;
}

/* 面包屑导航 */
.breadcrumb {
    padding: 15px 0;
    background: var(--bg-white);
    border-bottom: 1px solid var(--border-color);
}

.breadcrumb-list {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
}

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

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

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

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

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 40px;
}

.pagination a, .pagination span {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-small);
    font-size: 14px;
    transition: all 0.3s ease;
}

.pagination a {
    background: var(--bg-white);
    color: var(--text-dark);
    box-shadow: var(--shadow-light);
}

.pagination a:hover, .pagination span.active {
    background: var(--primary-gradient);
    color: white;
}

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

.tool-card {
    background: var(--bg-white);
    border-radius: var(--radius-medium);
    padding: 30px;
    box-shadow: var(--shadow-light);
    transition: all 0.3s ease;
}

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

.tool-icon {
    width: 70px;
    height: 70px;
    background: var(--primary-gradient);
    border-radius: var(--radius-medium);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 32px;
    color: white;
}

.tool-card h4 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.tool-card p {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 20px;
}

/* 社区帖子 */
.post-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.post-item {
    background: var(--bg-white);
    border-radius: var(--radius-medium);
    padding: 25px;
    box-shadow: var(--shadow-light);
    display: flex;
    gap: 20px;
}

.post-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.post-content {
    flex: 1;
}

.post-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

.post-author {
    font-weight: 600;
    color: var(--text-dark);
}

.post-time {
    font-size: 13px;
    color: var(--text-muted);
}

.post-text {
    font-size: 15px;
    color: var(--text-light);
    margin-bottom: 15px;
    line-height: 1.7;
}

.post-actions {
    display: flex;
    gap: 20px;
}

.post-actions a {
    font-size: 14px;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 5px;
}

.post-actions a:hover {
    color: var(--primary-pink);
}

/* 响应式设计 */
@media (max-width: 992px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .hero h1 {
        font-size: 36px;
    }
    
    .hero h2 {
        font-size: 20px;
    }
}

@media (max-width: 768px) {
    .header-inner {
        flex-wrap: wrap;
    }
    
    .main-nav {
        display: none;
        width: 100%;
        padding-top: 15px;
    }
    
    .main-nav.active {
        display: block;
    }
    
    .nav-list {
        flex-direction: column;
        gap: 10px;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero {
        padding: 50px 0;
    }
    
    .hero h1 {
        font-size: 28px;
    }
    
    .section {
        padding: 50px 0;
    }
    
    .section-header h2 {
        font-size: 28px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-social {
        justify-content: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .qrcode-section {
        gap: 30px;
    }
    
    .post-item {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero h1 {
        font-size: 24px;
    }
    
    .hero-btns {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
    }
    
    .video-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: shimmer 1.5s infinite;
}

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

/* 动画效果 */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

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

.stat-item h3 {
    font-size: 42px;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
}

.stat-item p {
    font-size: 16px;
    color: var(--text-light);
}

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

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

.page-header h1 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 15px;
}

.page-header p {
    font-size: 18px;
    opacity: 0.9;
}

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

/* 筛选栏 */
.filter-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 30px;
    padding: 20px;
    background: var(--bg-white);
    border-radius: var(--radius-medium);
    box-shadow: var(--shadow-light);
}

.filter-tabs {
    display: flex;
    gap: 10px;
}

.filter-tab {
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 14px;
    color: var(--text-light);
    background: var(--bg-light);
    cursor: pointer;
    transition: all 0.3s ease;
}

.filter-tab:hover, .filter-tab.active {
    background: var(--primary-gradient);
    color: white;
}

.filter-sort select {
    padding: 8px 15px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-small);
    font-size: 14px;
    outline: none;
}


/* 面包屑导航 */
.breadcrumb {
    background: var(--bg-white);
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}

.breadcrumb ol {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
}

.breadcrumb li {
    display: flex;
    align-items: center;
    font-size: 14px;
    color: var(--text-muted);
}

.breadcrumb li:not(:last-child)::after {
    content: '>';
    margin-left: 8px;
    color: var(--text-muted);
}

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

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

.breadcrumb li:last-child {
    color: var(--text-dark);
    font-weight: 500;
}