/* 
 * 国产视频 - 官方原创样式表
 * 品牌色：霓虹国产视频粉 (#ff2a74) & 赛博科技蓝 (#00f0ff)
 * 域名：yhuizy5.cn
 */

/* 1. 基础重置与变量定义 */
:root {
    --bg-dark: #0c0c10;
    --bg-card: #14141d;
    --bg-alt: #1a1a26;
    --primary: #ff2a74;
    --primary-glow: rgba(255, 42, 116, 0.4);
    --secondary: #00f0ff;
    --secondary-glow: rgba(0, 240, 255, 0.3);
    --text-main: #f5f5f7;
    --text-muted: #9fa0a7;
    --border-color: #262636;
    --transition-fast: 0.25s cubic-bezier(0.23, 1, 0.32, 1);
    --transition-medium: 0.4s cubic-bezier(0.23, 1, 0.32, 1);
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans CJK SC", sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

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

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

.accent-text {
    color: var(--primary);
    text-shadow: 0 0 10px var(--primary-glow);
}

/* 2. 头部导航栏样式 */
.site-header {
    background-color: rgba(12, 12, 16, 0.95);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.site-logo-img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid var(--primary);
    box-shadow: 0 0 10px var(--primary-glow);
}

.site-logo-text {
    font-size: 22px;
    font-weight: 800;
    letter-spacing: 1px;
    color: var(--text-main);
}

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

.site-nav .nav-list a {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-muted);
    padding: 8px 4px;
    position: relative;
}

.site-nav .nav-list a:hover,
.site-nav .nav-list a.active {
    color: var(--primary);
}

.site-nav .nav-list a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary);
    box-shadow: 0 0 8px var(--primary-glow);
    transition: var(--transition-fast);
}

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

.mobile-nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-main);
    font-size: 22px;
    cursor: pointer;
}

/* 3. 搜索框区域 */
.search-bar-section {
    background-color: var(--bg-alt);
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
}

.search-container {
    max-width: 600px;
    margin: 0 auto;
}

.pseudo-search-form {
    display: flex;
    background-color: var(--bg-dark);
    border: 1.5px solid var(--border-color);
    border-radius: 30px;
    padding: 5px 5px 5px 15px;
    align-items: center;
    transition: var(--transition-fast);
}

.pseudo-search-form:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 10px rgba(255, 42, 116, 0.2);
}

.search-icon {
    color: var(--text-muted);
    margin-right: 10px;
}

.pseudo-search-form input {
    background: none;
    border: none;
    color: var(--text-main);
    flex-grow: 1;
    font-size: 14px;
    outline: none;
}

.pseudo-search-form input::placeholder {
    color: var(--text-muted);
}

.search-submit-btn {
    background-color: var(--primary);
    border: none;
    border-radius: 20px;
    color: #fff;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    padding: 8px 20px;
    transition: var(--transition-fast);
}

.search-submit-btn:hover {
    background-color: #e01b5f;
    box-shadow: 0 0 10px var(--primary-glow);
}

/* 4. 英雄海报区域 */
.hero-section {
    background-size: cover;
    background-position: center;
    padding: 120px 20px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 54px;
    font-weight: 900;
    margin-bottom: 15px;
    letter-spacing: 2px;
    background: linear-gradient(135deg, #fff 30%, var(--primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 24px;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 25px;
    letter-spacing: 1px;
}

.hero-description {
    font-size: 16px;
    color: var(--text-muted);
    margin-bottom: 40px;
    line-height: 1.8;
}

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

.btn {
    display: inline-block;
    padding: 12px 30px;
    font-size: 16px;
    font-weight: 700;
    border-radius: 30px;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-primary {
    background-color: var(--primary);
    color: #fff;
    box-shadow: 0 4px 15px var(--primary-glow);
}

.btn-primary:hover {
    background-color: #e01b5f;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--primary-glow);
}

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

.btn-outline:hover {
    border-color: var(--text-main);
    background-color: rgba(255, 255, 255, 0.05);
    transform: translateY(-2px);
}

/* 5. 核心内容排版与视频卡片 */
.content-section {
    padding: 80px 20px;
}

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

.section-main-title {
    font-size: 32px;
    font-weight: 800;
    text-align: center;
    margin-bottom: 10px;
    position: relative;
}

.section-main-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background-color: var(--primary);
    margin: 15px auto 0;
    border-radius: 2px;
}

.section-subtitle {
    font-size: 16px;
    color: var(--text-muted);
    text-align: center;
    margin-bottom: 50px;
}

/* Tabs 切换样式 */
.tabs-container {
    margin-top: 30px;
}

.tab-buttons {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.tab-btn {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    padding: 10px 25px;
    border-radius: 25px;
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    transition: var(--transition-fast);
}

.tab-btn:hover,
.tab-btn.active {
    background-color: var(--primary);
    color: #fff;
    border-color: var(--primary);
    box-shadow: 0 4px 12px var(--primary-glow);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 视频卡片网格与卡片交互 */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 30px;
}

.video-card {
    background-color: var(--bg-card);
    border-radius: 15px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: var(--transition-medium);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.video-card:hover {
    transform: translateY(-6px);
    border-color: var(--primary);
    box-shadow: 0 10px 20px rgba(255, 42, 116, 0.15);
}

.video-thumbnail-wrapper {
    position: relative;
    padding-top: 56.25%; /* 16:9 比例 */
    overflow: hidden;
    background-color: #000;
}

.video-thumbnail {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-medium);
}

.video-card:hover .video-thumbnail {
    transform: scale(1.05);
}

.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.4);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: var(--transition-fast);
}

.video-card:hover .video-overlay {
    opacity: 1;
}

.play-icon {
    font-size: 50px;
    color: #fff;
    text-shadow: 0 0 15px var(--primary);
    transform: scale(0.9);
    transition: var(--transition-fast);
}

.video-card:hover .play-icon {
    transform: scale(1.1);
}

.video-duration {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background-color: rgba(0, 0, 0, 0.8);
    color: #fff;
    padding: 2px 8px;
    font-size: 12px;
    border-radius: 4px;
    font-weight: 600;
}

.video-info {
    padding: 20px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.video-title {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 10px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    height: 44px;
}

.video-desc {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 15px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    height: 36px;
}

.video-tags {
    display: flex;
    gap: 8px;
    margin-bottom: 15px;
}

.tag {
    background-color: rgba(255, 42, 116, 0.1);
    color: var(--primary);
    font-size: 11px;
    padding: 3px 8px;
    border-radius: 4px;
    font-weight: 600;
}

.video-meta {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
    padding-top: 12px;
    margin-top: auto;
}

/* 6. 专家展示样式 */
.experts-section {
    padding: 80px 20px;
}

.bg-alt {
    background-color: var(--bg-alt);
}

.experts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.expert-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 15px;
    padding: 30px;
    display: flex;
    gap: 20px;
    align-items: flex-start;
    transition: var(--transition-fast);
}

.expert-card:hover {
    border-color: var(--secondary);
    box-shadow: 0 8px 20px rgba(0, 240, 255, 0.1);
}

.expert-avatar-wrapper {
    flex-shrink: 0;
}

.expert-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--secondary);
}

.expert-details {
    flex-grow: 1;
}

.expert-name {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 4px;
}

.expert-title {
    font-size: 13px;
    color: var(--secondary);
    font-weight: 600;
    display: block;
    margin-bottom: 12px;
}

.expert-bio {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 15px;
    line-height: 1.6;
}

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

.expert-btn {
    font-size: 12px;
    font-weight: 700;
    padding: 6px 14px;
    border-radius: 15px;
    background-color: var(--secondary);
    color: #000;
}

.expert-btn.outline {
    background: none;
    border: 1px solid var(--text-muted);
    color: var(--text-main);
}

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

/* 7. 合作伙伴及指南 */
.b4kh0k5 {
    padding: 80px 20px;
}

.bw2r8 {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
    margin-bottom: 60px;
    align-items: center;
}

.w7xzw49 {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 16px;
    font-weight: 700;
    padding: 15px 30px;
    border-radius: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.guide-container {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 40px;
    align-items: center;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 40px;
}

.guide-title {
    font-size: 24px;
    font-weight: 800;
    margin-bottom: 15px;
}

.guide-desc {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 30px;
}

.steps-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.step-item {
    display: flex;
    gap: 15px;
}

.step-num {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: var(--primary);
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: 700;
    font-size: 14px;
    flex-shrink: 0;
}

.step-item strong {
    font-size: 15px;
    display: block;
    margin-bottom: 4px;
}

.step-item p {
    font-size: 13px;
    color: var(--text-muted);
}

.guide-visual img {
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

/* 8. 真实用户评论 */
.ddljp {
    padding: 80px 20px;
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 25px;
    margin-top: 40px;
}

.crmimc3j {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 15px;
    padding: 25px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.kiqlyrp {
    color: #ffb800;
    font-size: 14px;
    margin-bottom: 15px;
}

.wpz6q7ai {
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-main);
    margin-bottom: 20px;
    font-style: italic;
}

.im46h {
    border-top: 1px solid var(--border-color);
    padding-top: 15px;
    display: flex;
    flex-direction: column;
}

.m19tmnoi {
    font-size: 14px;
    font-weight: 700;
}

.j9mw83q {
    font-size: 11px;
    color: var(--primary);
    font-weight: 600;
    margin-top: 2px;
}

/* 9. 常见问题解答 (FAQ) */
.faq-section {
    padding: 80px 20px;
}

.faq-accordion {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    margin-bottom: 15px;
    overflow: hidden;
}

.faq-question {
    width: 100%;
    background: none;
    border: none;
    color: var(--text-main);
    padding: 20px;
    font-size: 16px;
    font-weight: 700;
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-question i {
    transition: var(--transition-fast);
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
    color: var(--primary);
}

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

.faq-item.active .faq-answer {
    padding-bottom: 20px;
}

.faq-answer p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.7;
}

/* 10. 联系我们区域 */
.contact-section {
    padding: 80px 20px;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    max-width: 1000px;
    margin: 40px auto 0;
}

.contact-info-card,
.contact-community-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 15px;
    padding: 35px;
}

.contact-info-card h3,
.contact-community-card h3 {
    font-size: 20px;
    font-weight: 800;
    margin-bottom: 20px;
    border-left: 4px solid var(--primary);
    padding-left: 12px;
}

.contact-info-card p,
.contact-community-card p {
    font-size: 14px;
    margin-bottom: 15px;
    color: var(--text-muted);
}

.contact-info-card strong,
.contact-community-card strong {
    color: var(--text-main);
}

.community-buttons {
    display: flex;
    gap: 15px;
    margin-top: 25px;
}

/* 11. 页脚样式 */
.site-footer {
    background-color: #060608;
    border-top: 1px solid var(--border-color);
    padding: 60px 20px 20px;
}

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

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 0.8fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

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

.footer-logo-img {
    width: 32px;
    height: 32px;
    border-radius: 50%;
}

.footer-brand-text {
    font-size: 18px;
    font-weight: 800;
}

.footer-brand .footer-desc {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 20px;
}

.share-title {
    font-size: 13px;
    color: var(--text-muted);
    display: block;
    margin-bottom: 8px;
}

.share-buttons {
    display: flex;
    gap: 10px;
}

.share-btn {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 14px;
    transition: var(--transition-fast);
}

.wechat-btn { background-color: #07c160; }
.weibo-btn { background-color: #e6162d; }
.bilibili-btn { background-color: #00a1d6; }
.douyin-btn { background-color: #000000; border: 1px solid #222; }

.share-btn:hover {
    transform: translateY(-2px);
    filter: brightness(1.1);
}

.footer-title {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 8px;
}

.footer-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background-color: var(--primary);
}

.footer-links-list,
.footer-contact-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
    font-size: 13px;
    color: var(--text-muted);
}

.footer-links-list a:hover {
    color: var(--primary);
    padding-left: 4px;
}

.footer-contact-list i {
    color: var(--primary);
    margin-right: 8px;
}

.footer-qrcodes {
    display: flex;
    gap: 20px;
}

.qrcode-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--text-muted);
}

.qrcode-img {
    width: 90px;
    height: 90px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    padding: 4px;
    background-color: #fff;
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
    text-align: center;
    font-size: 12px;
    color: var(--text-muted);
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 15px;
}

/* 12. 响应式适配媒体查询 */
@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .site-nav {
        display: none; /* 移动端默认隐藏 */
    }
    
    .mobile-nav-toggle {
        display: block;
    }
    
    .hero-title {
        font-size: 38px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .guide-container {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}