/* 丝瓜视频 - 主样式文件 */
/* vxjamut.cn */

:root {
    --primary-color: #FF6B6B;
    --secondary-color: #FF8E53;
    --accent-color: #FFB347;
    --dark-color: #2D3436;
    --light-color: #F8F9FA;
    --text-color: #333333;
    --text-light: #666666;
    --gradient: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--light-color);
}

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

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

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

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

/* 头部导航 */
.header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo img {
    height: 50px;
    width: auto;
}

.logo-text {
    font-size: 24px;
    font-weight: bold;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-menu a {
    font-size: 16px;
    font-weight: 500;
    padding: 8px 0;
    position: relative;
}

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

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background: var(--dark-color);
    transition: 0.3s;
}

/* 搜索框 */
.search-bar {
    background: linear-gradient(135deg, #f5f5f5, #e8e8e8);
    padding: 15px 0;
    border-bottom: 1px solid #eee;
}

.search-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
}

.search-input {
    width: 100%;
    max-width: 500px;
    padding: 12px 20px;
    border: 2px solid #ddd;
    border-radius: 25px;
    font-size: 14px;
    outline: none;
    transition: border-color 0.3s ease;
}

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

.search-btn {
    padding: 12px 25px;
    background: var(--gradient);
    color: #fff;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    font-size: 14px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.search-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 107, 107, 0.4);
}

/* Hero区域 */
.hero {
    background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5)), url('../images/hero-bg.jpg') center/cover no-repeat;
    color: #fff;
    padding: 100px 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-btns {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 15px 35px;
    border-radius: 30px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background: var(--gradient);
    color: #fff;
    border: none;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(255, 107, 107, 0.4);
}

.btn-secondary {
    background: transparent;
    color: #fff;
    border: 2px solid #fff;
}

.btn-secondary:hover {
    background: #fff;
    color: var(--primary-color);
}

/* 视频卡片 */
.section {
    padding: 80px 0;
}

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

.section-title h2 {
    font-size: 36px;
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--gradient);
}

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

.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
}

.video-card {
    background: #fff;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.video-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.video-thumb {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16/9;
}

.video-thumb img {
    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, 107, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

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

.play-btn::after {
    content: '';
    width: 0;
    height: 0;
    border-left: 18px 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: 12px;
}

.video-info {
    padding: 20px;
}

.video-info h3 {
    font-size: 18px;
    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;
    align-items: center;
    color: var(--text-light);
    font-size: 14px;
}

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

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

/* 专家展示 */
.experts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
}

.expert-card {
    background: #fff;
    border-radius: 15px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 5px 20px 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%;
    object-fit: cover;
    margin-bottom: 20px;
    border: 4px solid var(--primary-color);
}

.expert-card h3 {
    font-size: 20px;
    margin-bottom: 5px;
}

.expert-title {
    color: var(--primary-color);
    font-size: 14px;
    margin-bottom: 15px;
}

.expert-desc {
    color: var(--text-light);
    font-size: 14px;
    margin-bottom: 20px;
}

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

.expert-btns .btn {
    padding: 10px 20px;
    font-size: 14px;
}

/* 特色模块 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    background: #fff;
    border-radius: 15px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

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

.feature-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient);
    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: 18px;
    margin-bottom: 10px;
}

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

/* 用户评价 */
.testimonials {
    background: linear-gradient(135deg, #fff5f5, #fff0e6);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
}

.testimonial-card {
    background: #fff;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.testimonial-content {
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 20px;
    color: var(--text-color);
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 15px;
}

.testimonial-author img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
}

.author-info h4 {
    font-size: 16px;
    margin-bottom: 5px;
}

.author-info span {
    color: var(--text-light);
    font-size: 14px;
}

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

.contact-card {
    background: #fff;
    border-radius: 15px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.contact-card h3 {
    font-size: 20px;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.contact-card img {
    max-width: 150px;
    margin-bottom: 15px;
}

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

/* 页脚 */
.footer {
    background: var(--dark-color);
    color: #fff;
    padding: 60px 0 30px;
}

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

.footer-col h4 {
    font-size: 18px;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background: var(--primary-color);
}

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

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

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

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

.footer-bottom {
    border-top: 1px solid #444;
    padding-top: 30px;
    text-align: center;
    color: #aaa;
    font-size: 14px;
}

.footer-bottom p {
    margin-bottom: 10px;
}

/* 面包屑导航 */
.breadcrumb {
    background: #f5f5f5;
    padding: 15px 0;
}

.breadcrumb-list {
    display: flex;
    align-items: center;
    gap: 10px;
    list-style: none;
    font-size: 14px;
}

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

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

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

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

/* 内页横幅 */
.page-banner {
    background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)), url('../images/community-banner.jpg') center/cover no-repeat;
    padding: 80px 0;
    text-align: center;
    color: #fff;
}

.page-banner h1 {
    font-size: 42px;
    margin-bottom: 15px;
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    }

    .nav-menu.active {
        display: flex;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .hero h1 {
        font-size: 32px;
    }

    .hero p {
        font-size: 16px;
    }

    .section-title h2 {
        font-size: 28px;
    }

    .video-grid,
    .experts-grid,
    .features-grid,
    .testimonials-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .hero-btns {
        flex-direction: column;
        align-items: center;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }
}

/* 懒加载占位 */
.lazy-load {
    opacity: 0;
    transition: opacity 0.3s ease;
}

.lazy-load.loaded {
    opacity: 1;
}

/* 社交分享按钮 */
.share-buttons {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-top: 20px;
}

.share-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 18px;
    transition: transform 0.3s ease;
}

.share-btn:hover {
    transform: scale(1.1);
}

.share-btn.wechat {
    background: #07C160;
}

.share-btn.weibo {
    background: #E6162D;
}

.share-btn.douyin {
    background: #000;
}

.share-btn.bilibili {
    background: #FB7299;
}

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

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

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

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

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

.faq-answer {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

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

/* 合作品牌墙 */
.partners-wall {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 30px;
    align-items: center;
}

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

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