/* 丝瓜视频 - 清爽视频内容与精彩资源平台 CSS样式表 */
/* 网站: qtlqfkc.cn */

/* ========== 基础重置与变量 ========== */
:root {
    --primary-color: #FF6B9D;
    --secondary-color: #FF8A80;
    --accent-color: #7C4DFF;
    --dark-bg: #1a1a2e;
    --light-bg: #f8f9fa;
    --text-dark: #2d3436;
    --text-light: #636e72;
    --white: #ffffff;
    --gradient-primary: linear-gradient(135deg, #FF6B9D 0%, #FF8A80 100%);
    --gradient-dark: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.15);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.2);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

* {
    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', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--white);
}

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(255,255,255,0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
}

.header-inner {
    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;
    font-weight: 700;
    font-size: 1.4rem;
    color: var(--primary-color);
}

.logo img {
    width: 45px;
    height: 45px;
    border-radius: 10px;
}

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

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

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

.nav-menu li a:hover {
    color: var(--primary-color);
}

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

.nav-menu li a:hover::after {
    width: 100%;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-dark);
}

/* ========== 搜索框 ========== */
.search-bar {
    background: var(--light-bg);
    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 #e0e0e0;
    border-radius: 25px;
    font-size: 1rem;
    outline: none;
    transition: var(--transition);
}

.search-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(255,107,157,0.1);
}

.search-btn {
    padding: 12px 30px;
    background: var(--gradient-primary);
    color: var(--white);
    border: none;
    border-radius: 25px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

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

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

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-size: cover;
    background-position: center;
    opacity: 0.4;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 1400px;
    margin: 0 auto;
    padding: 80px 20px;
    color: var(--white);
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero h1 span {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.3rem;
    opacity: 0.9;
    margin-bottom: 30px;
    max-width: 600px;
}

.hero-btns {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(255,107,157,0.4);
}

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

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

/* ========== 通用Section ========== */
.section {
    padding: 80px 20px;
}

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

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

.container {
    max-width: 1400px;
    margin: 0 auto;
}

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

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 15px;
}

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

.section-dark .section-header p {
    color: rgba(255,255,255,0.7);
}

/* ========== 视频卡片 ========== */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 25px;
}

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

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

.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: 60px;
    height: 60px;
    background: rgba(255,107,157,0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

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

.play-btn::after {
    content: '';
    width: 0;
    height: 0;
    border-left: 18px solid var(--white);
    border-top: 12px solid transparent;
    border-bottom: 12px solid transparent;
    margin-left: 4px;
}

.video-duration {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background: rgba(0,0,0,0.8);
    color: var(--white);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.85rem;
}

.video-info {
    padding: 18px;
}

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

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

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

.video-tag {
    background: var(--light-bg);
    color: var(--text-light);
    padding: 4px 10px;
    border-radius: 15px;
    font-size: 0.8rem;
}

/* ========== 主播/专家卡片 ========== */
.streamer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
}

.streamer-card {
    background: var(--white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: var(--transition);
}

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

.streamer-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    margin: 25px auto 15px;
    border: 4px solid var(--primary-color);
    overflow: hidden;
}

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

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

.streamer-info h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 5px;
}

.streamer-title {
    color: var(--primary-color);
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.streamer-desc {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 15px;
}

.streamer-stats {
    display: flex;
    justify-content: center;
    gap: 20px;
    padding-top: 15px;
    border-top: 1px solid #eee;
}

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

.stat-num {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-light);
}

/* ========== 专家展示 ========== */
.expert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
}

.expert-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--shadow-sm);
    display: flex;
    gap: 20px;
    transition: var(--transition);
}

.expert-card:hover {
    box-shadow: var(--shadow-md);
}

.expert-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
}

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

.expert-info h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 5px;
}

.expert-role {
    color: var(--primary-color);
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.expert-desc {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 15px;
}

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

.expert-btns .btn {
    padding: 8px 16px;
    font-size: 0.85rem;
}

/* ========== 合作品牌 ========== */
.partner-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 40px;
    padding: 30px 0;
}

.partner-logos img {
    height: 60px;
    opacity: 0.7;
    transition: var(--transition);
    filter: grayscale(100%);
}

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

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

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

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

.faq-question:hover {
    color: var(--primary-color);
}

.faq-question::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--primary-color);
}

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

.faq-answer {
    padding: 0 25px;
    max-height: 0;
    overflow: hidden;
    transition: var(--transition);
}

.faq-item.active .faq-answer {
    padding: 0 25px 20px;
    max-height: 500px;
}

/* ========== 用户评价 ========== */
.review-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 25px;
}

.review-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 25px;
    box-shadow: var(--shadow-sm);
}

.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: var(--white);
    font-weight: 700;
    font-size: 1.2rem;
}

.review-user h4 {
    font-size: 1rem;
    font-weight: 600;
}

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

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

/* ========== 联系我们 ========== */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.3rem;
    flex-shrink: 0;
}

.contact-item p {
    margin: 0;
}

.contact-item p strong {
    display: block;
    margin-bottom: 5px;
}

.qrcode-grid {
    display: flex;
    gap: 30px;
    justify-content: center;
    flex-wrap: wrap;
}

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

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

.qrcode-item p {
    font-size: 0.9rem;
    color: var(--text-light);
}

/* ========== 社交分享 ========== */
.social-share {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 30px;
}

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

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

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

/* ========== 页脚 ========== */
.footer {
    background: var(--dark-bg);
    color: var(--white);
    padding: 60px 20px 30px;
}

.footer-inner {
    max-width: 1400px;
    margin: 0 auto;
}

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

.footer-col h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--primary-color);
}

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

.footer-col ul li a {
    color: rgba(255,255,255,0.7);
    font-size: 0.95rem;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 25px;
    text-align: center;
    color: rgba(255,255,255,0.6);
    font-size: 0.9rem;
}

.footer-bottom p {
    margin-bottom: 8px;
}

/* ========== 面包屑导航 ========== */
.breadcrumb {
    background: var(--light-bg);
    padding: 15px 20px;
    margin-top: 70px;
}

.breadcrumb-inner {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
}

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

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

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

/* ========== 内页Hero ========== */
.page-hero {
    background: var(--gradient-dark);
    padding: 100px 20px 60px;
    text-align: center;
    color: var(--white);
}

.page-hero h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 15px;
}

.page-hero p {
    font-size: 1.1rem;
    opacity: 0.8;
    max-width: 600px;
    margin: 0 auto;
}

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

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

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

.feature-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 2rem;
}

.feature-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 10px;
}

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

/* ========== 响应式设计 ========== */
@media (max-width: 992px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .expert-card {
        flex-direction: column;
        text-align: center;
    }
    
    .expert-avatar {
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        gap: 0;
        box-shadow: var(--shadow-md);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-menu li {
        border-bottom: 1px solid #eee;
    }
    
    .nav-menu li:last-child {
        border-bottom: none;
    }
    
    .nav-menu li a {
        display: block;
        padding: 15px 0;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .hero {
        min-height: 500px;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1.1rem;
    }
    
    .hero-btns {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .section {
        padding: 50px 15px;
    }
    
    .video-grid,
    .streamer-grid,
    .expert-grid,
    .review-grid,
    .feature-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .search-container {
        flex-direction: column;
    }
    
    .search-btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .header-inner {
        height: 60px;
    }
    
    .logo {
        font-size: 1.2rem;
    }
    
    .logo img {
        width: 35px;
        height: 35px;
    }
    
    .hero h1 {
        font-size: 1.7rem;
    }
    
    .section-header h2 {
        font-size: 1.6rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .qrcode-grid {
        flex-direction: column;
        align-items: center;
    }
}

/* ========== 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 {
    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; }
}