/* ============================================
   糖心vlog - 原创CSS样式 V3
   配色方案：珊瑚橙暖色系
   设计风格：现代卡片式 + 渐变背景
   ============================================ */

/* CSS变量定义 */
:root {
    /* 主色调 - 珊瑚橙暖色系 */
    --primary-color: #FF6B6B;
    --primary-dark: #E85555;
    --secondary-color: #FFB347;
    --accent-color: #4ECDC4;
    --accent-dark: #3DB8B0;
    
    /* 文字颜色 */
    --text-primary: #2D3436;
    --text-secondary: #636E72;
    --text-light: #B2BEC3;
    --text-white: #FFFFFF;
    
    /* 背景颜色 */
    --bg-primary: #0F0F1A;
    --bg-secondary: #1A1A2E;
    --bg-card: #252540;
    --bg-card-hover: #2F2F4A;
    
    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, #FF6B6B 0%, #FFB347 100%);
    --gradient-accent: linear-gradient(135deg, #4ECDC4 0%, #44A08D 100%);
    --gradient-dark: linear-gradient(180deg, #0F0F1A 0%, #1A1A2E 100%);
    
    /* 尺寸 */
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 20px;
    --border-radius-xl: 30px;
    
    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.15);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.25);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.35);
    --shadow-glow: 0 0 30px rgba(255, 107, 107, 0.3);
    
    /* 过渡 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--gradient-dark);
    color: var(--text-white);
    line-height: 1.7;
    min-height: 100vh;
}

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

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

ul, ol {
    list-style: none;
}

/* ============================================
   导航栏
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15, 15, 26, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    padding: 0 2rem;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-logo {
    height: 45px;
    width: auto;
}

.nav-title {
    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;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-light);
    position: relative;
    padding: 0.5rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-normal);
}

.nav-link:hover {
    color: var(--text-white);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-download {
    background: var(--gradient-primary);
    color: var(--text-white);
    padding: 0.6rem 1.5rem;
    border-radius: var(--border-radius-xl);
    font-weight: 600;
    font-size: 0.9rem;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.nav-download:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

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

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-white);
    border-radius: 2px;
    transition: var(--transition-fast);
}

/* ============================================
   Hero区域
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 120px 2rem 80px;
    background: 
        radial-gradient(ellipse at 20% 80%, rgba(255, 107, 107, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(255, 179, 71, 0.15) 0%, transparent 50%),
        var(--gradient-dark);
}

.hero-content {
    max-width: 900px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

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

.hero-desc {
    font-size: 1.15rem;
    color: var(--text-light);
    max-width: 700px;
    margin: 0 auto 2.5rem;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: var(--border-radius-xl);
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition-fast);
    cursor: pointer;
    border: none;
}

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

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

.btn-outline {
    background: transparent;
    color: var(--text-white);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-outline:hover {
    border-color: var(--primary-color);
    background: rgba(255, 107, 107, 0.1);
}

/* ============================================
   通用区块样式
   ============================================ */
.section {
    padding: 80px 2rem;
}

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

.container {
    max-width: 1280px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 0.8rem;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-top: 1rem;
}

/* ============================================
   精选视频区
   ============================================ */
.featured-video {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 3rem;
    align-items: center;
}

.featured-player {
    position: relative;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.featured-player img {
    width: 100%;
    aspect-ratio: 16/9;
    object-fit: cover;
}

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.play-button::before {
    content: '';
    width: 0;
    height: 0;
    border-left: 25px solid var(--text-white);
    border-top: 15px solid transparent;
    border-bottom: 15px solid transparent;
    margin-left: 5px;
}

.play-button:hover {
    transform: translate(-50%, -50%) scale(1.1);
    box-shadow: var(--shadow-glow);
}

.featured-info h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

.featured-info p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

/* ============================================
   关于我们
   ============================================ */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-content h3 {
    font-size: 1.6rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.about-content p {
    color: var(--text-light);
    line-height: 1.9;
    margin-bottom: 1rem;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.stat-card {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--border-radius-md);
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.stat-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ============================================
   视频卡片网格
   ============================================ */
.video-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.video-card {
    background: var(--bg-card);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

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

.video-thumb {
    position: relative;
    aspect-ratio: 16/10;
    overflow: hidden;
}

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

.video-card:hover .video-thumb img {
    transform: scale(1.08);
}

.video-duration {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background: rgba(0, 0, 0, 0.8);
    color: var(--text-white);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 600;
}

.video-info {
    padding: 1.2rem;
}

.video-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.8rem;
    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: 1rem;
    margin-bottom: 0.8rem;
}

.video-rating {
    color: var(--secondary-color);
    font-size: 0.85rem;
    font-weight: 600;
}

.video-views {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.video-desc {
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ============================================
   资质认证
   ============================================ */
.cert-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.cert-card {
    background: var(--bg-card);
    padding: 2.5rem 2rem;
    border-radius: var(--border-radius-md);
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-fast);
}

.cert-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-color);
}

.cert-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 1.5rem;
    background: var(--gradient-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
}

.cert-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.8rem;
}

.cert-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* ============================================
   支付方式
   ============================================ */
.payment-section {
    text-align: center;
}

.payment-icons {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
    margin-top: 2rem;
}

.payment-icons img {
    height: 50px;
    opacity: 0.8;
    transition: opacity var(--transition-fast);
}

.payment-icons img:hover {
    opacity: 1;
}

/* ============================================
   客户支持
   ============================================ */
.support-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.support-card {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: var(--border-radius-md);
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.support-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 1.5rem;
    background: rgba(255, 107, 107, 0.15);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}

.support-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.8rem;
}

.support-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ============================================
   负责任观影
   ============================================ */
.responsible-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.responsible-content p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.age-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--primary-color);
    color: var(--text-white);
    padding: 0.8rem 2rem;
    border-radius: var(--border-radius-xl);
    font-weight: 700;
    font-size: 1.2rem;
    margin-top: 1.5rem;
}

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

.faq-item {
    background: var(--bg-card);
    border-radius: var(--border-radius-md);
    margin-bottom: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.05);
    overflow: hidden;
}

.faq-question {
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.faq-question:hover {
    background: var(--bg-card-hover);
}

.faq-question h4 {
    font-size: 1.05rem;
    font-weight: 600;
}

.faq-toggle {
    width: 30px;
    height: 30px;
    background: rgba(255, 107, 107, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--primary-color);
    transition: transform var(--transition-fast);
}

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

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
}

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

.faq-answer p {
    padding: 0 2rem 1.5rem;
    color: var(--text-light);
    line-height: 1.8;
}

/* ============================================
   用户评价
   ============================================ */
.review-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.review-card {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--border-radius-md);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.review-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.review-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
}

.review-user h5 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.2rem;
}

.review-location {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.review-rating {
    color: var(--secondary-color);
    font-size: 0.9rem;
    margin-bottom: 0.8rem;
}

.review-content {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 1rem;
}

.review-date {
    color: var(--text-secondary);
    font-size: 0.8rem;
}

/* ============================================
   热门标签
   ============================================ */
.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
}

.tag {
    background: var(--bg-card);
    color: var(--text-light);
    padding: 0.6rem 1.5rem;
    border-radius: var(--border-radius-xl);
    font-size: 0.9rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-fast);
}

.tag:hover {
    background: var(--primary-color);
    color: var(--text-white);
    border-color: var(--primary-color);
    transform: translateY(-3px);
}

/* ============================================
   页脚
   ============================================ */
.footer {
    background: var(--bg-secondary);
    padding: 60px 2rem 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: 3rem;
    max-width: 1280px;
    margin: 0 auto 3rem;
}

.footer-brand .nav-brand {
    margin-bottom: 1rem;
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    max-width: 300px;
}

.footer-links h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-white);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.95rem;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    max-width: 1280px;
    margin: 0 auto;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-copyright {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-legal {
    display: flex;
    gap: 2rem;
}

.footer-legal a {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

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

/* ============================================
   面包屑导航
   ============================================ */
.breadcrumb {
    padding: 100px 2rem 20px;
    background: var(--bg-secondary);
}

.breadcrumb-list {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    max-width: 1280px;
    margin: 0 auto;
}

.breadcrumb-list a {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

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

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

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

/* ============================================
   分类页头部
   ============================================ */
.category-header {
    background: var(--bg-secondary);
    padding: 40px 2rem 60px;
    text-align: center;
}

.category-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.category-header p {
    color: var(--text-light);
    font-size: 1.1rem;
}

/* ============================================
   文章内容
   ============================================ */
.article-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 60px 2rem;
}

.article-content h2 {
    font-size: 1.8rem;
    font-weight: 700;
    margin: 2.5rem 0 1.5rem;
    color: var(--primary-color);
}

.article-content h3 {
    font-size: 1.4rem;
    font-weight: 600;
    margin: 2rem 0 1rem;
}

.article-content p {
    color: var(--text-light);
    line-height: 1.9;
    margin-bottom: 1.5rem;
}

.article-content img {
    border-radius: var(--border-radius-md);
    margin: 2rem 0;
}

.article-content a {
    color: var(--primary-color);
    text-decoration: underline;
}

/* ============================================
   返回顶部按钮
   ============================================ */
.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;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
    z-index: 999;
    box-shadow: var(--shadow-md);
}

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

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

.back-to-top::before {
    content: '↑';
    font-size: 1.5rem;
    color: var(--text-white);
    font-weight: bold;
}

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 1200px) {
    .video-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 992px) {
    .featured-video {
        grid-template-columns: 1fr;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .cert-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .review-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-desc {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .video-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .cert-grid {
        grid-template-columns: 1fr;
    }
    
    .support-grid {
        grid-template-columns: 1fr;
    }
    
    .review-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-brand p {
        max-width: 100%;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.8rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .video-grid {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
}