/* ========================================
   抖阴 - 动物写真传媒平台
   原创主题配色：森林绿 + 暖橙 + 深棕
   域名：891826.cn
   ======================================== */

/* ---- CSS变量 ---- */
:root {
    --color-primary: #2D7A3A;       /* 森林深绿 */
    --color-primary-light: #4CAF50; /* 鲜绿 */
    --color-secondary: #E8720C;     /* 暖橙 */
    --color-accent: #F5A623;        /* 金黄 */
    --color-dark: #1A2E1A;          /* 深森林色 */
    --color-dark2: #243324;         /* 次深色 */
    --color-text: #2C3E2C;          /* 正文色 */
    --color-text-light: #5A7A5A;    /* 次要文字 */
    --color-bg: #F5F9F0;            /* 背景浅绿白 */
    --color-bg2: #EBF3E8;           /* 次背景 */
    --color-card: #FFFFFF;          /* 卡片白 */
    --color-border: #C8E0C0;        /* 边框浅绿 */
    --color-white: #FFFFFF;
    --font-main: 'PingFang SC', 'Microsoft YaHei', '微软雅黑', sans-serif;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 22px;
    --shadow-sm: 0 2px 8px rgba(45,122,58,0.10);
    --shadow-md: 0 6px 24px rgba(45,122,58,0.15);
    --shadow-lg: 0 12px 40px rgba(45,122,58,0.20);
    --transition: 0.3s ease;
}

/* ---- 重置 ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
    font-family: var(--font-main);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    overflow-x: hidden;
}
a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-secondary); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }

/* ---- 干扰标签隐藏（不影响布局） ---- */
.dstr-wrap { display: none !important; visibility: hidden !important; position: absolute !important; left: -9999px !important; top: -9999px !important; width: 0 !important; height: 0 !important; overflow: hidden !important; }

/* ---- 通用容器 ---- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 70px 0; }
.section-alt { background: var(--color-bg2); }

/* ---- 通用标题 ---- */
.section-header { text-align: center; margin-bottom: 50px; }
.section-header h2 { font-size: 2rem; color: var(--color-dark); font-weight: 700; margin-bottom: 12px; }
.section-header p { color: var(--color-text-light); font-size: 1.05rem; max-width: 600px; margin: 0 auto; }
.section-header .tag { display: inline-block; background: var(--color-primary); color: #fff; font-size: 0.78rem; padding: 3px 12px; border-radius: 20px; margin-bottom: 10px; letter-spacing: 1px; }

/* ---- 按钮 ---- */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 11px 26px; border-radius: var(--radius-md); font-size: 0.95rem; font-weight: 600; cursor: pointer; border: none; transition: all var(--transition); }
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-light); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-secondary { background: var(--color-secondary); color: #fff; }
.btn-secondary:hover { background: #d4620a; color: #fff; transform: translateY(-2px); }
.btn-outline { background: transparent; border: 2px solid var(--color-primary); color: var(--color-primary); }
.btn-outline:hover { background: var(--color-primary); color: #fff; }
.btn-sm { padding: 7px 16px; font-size: 0.85rem; }

/* ========================================
   顶部通知栏
   ======================================== */
.top-bar {
    background: var(--color-dark);
    color: rgba(255,255,255,0.85);
    font-size: 0.82rem;
    padding: 7px 0;
    text-align: center;
}
.top-bar a { color: var(--color-accent); }
.top-bar .top-bar-inner { display: flex; justify-content: space-between; align-items: center; }

/* ========================================
   导航栏
   ======================================== */
.site-header {
    background: var(--color-white);
    box-shadow: 0 2px 12px rgba(45,122,58,0.10);
    position: sticky;
    top: 0;
    z-index: 1000;
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
    gap: 20px;
}
.site-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    flex-shrink: 0;
}
.site-logo img.logo-icon {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    object-fit: cover;
}
.site-logo img.logo-main {
    height: 40px;
    width: auto;
}
.site-logo .logo-text {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--color-primary);
    letter-spacing: 1px;
}
.site-logo .logo-sub {
    font-size: 0.7rem;
    color: var(--color-text-light);
    display: block;
    line-height: 1;
}

/* 搜索框 */
.header-search {
    flex: 1;
    max-width: 380px;
    position: relative;
}
.header-search input {
    width: 100%;
    padding: 9px 42px 9px 16px;
    border: 2px solid var(--color-border);
    border-radius: 24px;
    font-size: 0.9rem;
    background: var(--color-bg);
    color: var(--color-text);
    outline: none;
    transition: border-color var(--transition);
}
.header-search input:focus { border-color: var(--color-primary); }
.header-search button {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-primary);
    font-size: 1rem;
    padding: 4px;
}

/* 主导航 */
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.92rem;
    font-weight: 500;
    color: var(--color-text);
    white-space: nowrap;
    transition: all var(--transition);
}
.main-nav a:hover, .main-nav a.active {
    background: var(--color-bg2);
    color: var(--color-primary);
}
.main-nav a.nav-highlight {
    background: var(--color-secondary);
    color: #fff;
    padding: 8px 16px;
}
.main-nav a.nav-highlight:hover { background: #d4620a; color: #fff; }

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
    color: var(--color-dark);
    font-size: 1.5rem;
}
.mobile-nav {
    display: none;
    background: var(--color-white);
    border-top: 1px solid var(--color-border);
    padding: 12px 20px;
}
.mobile-nav a {
    display: block;
    padding: 10px 0;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text);
    font-size: 0.95rem;
}
.mobile-nav a:last-child { border-bottom: none; }

/* 面包屑 */
.breadcrumb-bar {
    background: var(--color-bg2);
    padding: 10px 0;
    border-bottom: 1px solid var(--color-border);
    font-size: 0.85rem;
}
.breadcrumb-bar ol { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.breadcrumb-bar li { color: var(--color-text-light); }
.breadcrumb-bar li a { color: var(--color-primary); }
.breadcrumb-bar li::after { content: '›'; margin-left: 6px; }
.breadcrumb-bar li:last-child::after { display: none; }
.breadcrumb-bar li:last-child { color: var(--color-text); }

/* ========================================
   Hero Banner
   ======================================== */
.hero-banner {
    position: relative;
    min-height: 580px;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: var(--color-dark);
}
.hero-banner .hero-bg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.65;
}
.hero-banner .hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(26,46,26,0.88) 0%, rgba(26,46,26,0.40) 60%, transparent 100%);
}
.hero-content {
    position: relative;
    z-index: 2;
    max-width: 600px;
    padding: 60px 0;
}
.hero-content .hero-tag {
    display: inline-block;
    background: var(--color-secondary);
    color: #fff;
    font-size: 0.78rem;
    padding: 4px 14px;
    border-radius: 20px;
    margin-bottom: 18px;
    font-weight: 600;
    letter-spacing: 1px;
}
.hero-content h1 {
    font-size: 3rem;
    font-weight: 900;
    color: #fff;
    line-height: 1.2;
    margin-bottom: 16px;
    text-shadow: 0 2px 12px rgba(0,0,0,0.4);
}
.hero-content h1 span { color: var(--color-accent); }
.hero-content .hero-desc {
    font-size: 1.05rem;
    color: rgba(255,255,255,0.88);
    margin-bottom: 28px;
    line-height: 1.8;
}
.hero-content .hero-stats {
    display: flex;
    gap: 28px;
    margin-bottom: 32px;
}
.hero-stat { text-align: center; }
.hero-stat .num { font-size: 1.6rem; font-weight: 800; color: var(--color-accent); display: block; }
.hero-stat .label { font-size: 0.8rem; color: rgba(255,255,255,0.75); }
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }

/* ========================================
   视频卡片 (核心模块)
   ======================================== */
.video-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}
.video-card {
    background: var(--color-card);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
    cursor: pointer;
}
.video-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}
.video-thumb {
    position: relative;
    aspect-ratio: 16/9;
    overflow: hidden;
    background: var(--color-dark2);
}
.video-thumb video,
.video-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.video-card:hover .video-thumb video,
.video-card:hover .video-thumb img {
    transform: scale(1.06);
}
.video-play-btn {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.25);
    opacity: 0;
    transition: opacity var(--transition);
}
.video-card:hover .video-play-btn { opacity: 1; }
.video-play-btn .play-icon {
    width: 54px;
    height: 54px;
    background: rgba(255,255,255,0.92);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    color: var(--color-primary);
    box-shadow: 0 4px 16px rgba(0,0,0,0.3);
    transform: scale(0.85);
    transition: transform var(--transition);
}
.video-card:hover .play-icon { transform: scale(1); }
.video-duration {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(0,0,0,0.72);
    color: #fff;
    font-size: 0.75rem;
    padding: 2px 7px;
    border-radius: 4px;
}
.video-badge {
    position: absolute;
    top: 8px;
    left: 8px;
    background: var(--color-secondary);
    color: #fff;
    font-size: 0.7rem;
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 600;
}
.video-info { padding: 14px; }
.video-info h3 {
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--color-dark);
    margin-bottom: 8px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.video-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.78rem;
    color: var(--color-text-light);
}
.video-meta .views::before { content: '▶ '; }
.video-meta .likes::before { content: '♥ '; color: #e74c3c; }
.video-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 8px; }
.video-tag {
    background: var(--color-bg2);
    color: var(--color-primary);
    font-size: 0.72rem;
    padding: 2px 8px;
    border-radius: 12px;
    border: 1px solid var(--color-border);
}

/* 视频预览大卡片 */
.video-featured {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 24px;
    align-items: start;
}
.video-featured-main {
    background: var(--color-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}
.video-featured-main .video-thumb { aspect-ratio: 16/9; }
.video-featured-main .video-info { padding: 20px; }
.video-featured-main .video-info h2 { font-size: 1.3rem; margin-bottom: 10px; }
.video-featured-main .video-info p { color: var(--color-text-light); font-size: 0.9rem; line-height: 1.7; }
.video-list-side { display: flex; flex-direction: column; gap: 14px; }
.video-list-item {
    display: flex;
    gap: 12px;
    background: var(--color-card);
    border-radius: var(--radius-sm);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    transition: all var(--transition);
}
.video-list-item:hover { transform: translateX(4px); box-shadow: var(--shadow-md); }
.video-list-item .thumb {
    width: 120px;
    flex-shrink: 0;
    position: relative;
    overflow: hidden;
}
.video-list-item .thumb img { width: 100%; height: 68px; object-fit: cover; }
.video-list-item .info { padding: 8px 10px; flex: 1; }
.video-list-item .info h4 { font-size: 0.85rem; color: var(--color-dark); line-height: 1.4; margin-bottom: 4px; }
.video-list-item .info span { font-size: 0.75rem; color: var(--color-text-light); }

/* ========================================
   内嵌H5 Video预览区
   ======================================== */
.video-preview-section { background: var(--color-dark); padding: 60px 0; }
.video-preview-section .section-header h2 { color: #fff; }
.video-preview-section .section-header p { color: rgba(255,255,255,0.7); }
.video-preview-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    grid-template-rows: auto auto;
    gap: 16px;
}
.video-preview-item {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    background: #000;
}
.video-preview-item video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
.video-preview-item.main-video { grid-row: 1 / 3; }
.video-preview-item.main-video video { height: 340px; }
.video-preview-item:not(.main-video) video { height: 160px; }
.video-preview-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.30);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 14px;
    opacity: 0;
    transition: opacity var(--transition);
}
.video-preview-item:hover .video-preview-overlay { opacity: 1; }
.video-preview-overlay h4 { color: #fff; font-size: 0.9rem; margin-bottom: 4px; }
.video-preview-overlay span { color: rgba(255,255,255,0.75); font-size: 0.78rem; }
.video-preview-play {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.8);
    width: 52px;
    height: 52px;
    background: rgba(255,255,255,0.90);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    color: var(--color-primary);
    opacity: 0;
    transition: all var(--transition);
}
.video-preview-item:hover .video-preview-play {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
}

/* ========================================
   分类导航
   ======================================== */
.category-nav {
    background: var(--color-white);
    border-bottom: 2px solid var(--color-border);
    padding: 0;
}
.category-nav-inner {
    display: flex;
    gap: 0;
    overflow-x: auto;
    scrollbar-width: none;
}
.category-nav-inner::-webkit-scrollbar { display: none; }
.cat-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 14px 22px;
    border: none;
    background: none;
    cursor: pointer;
    color: var(--color-text-light);
    font-size: 0.88rem;
    white-space: nowrap;
    border-bottom: 3px solid transparent;
    transition: all var(--transition);
    font-family: var(--font-main);
}
.cat-btn .cat-icon { font-size: 1.4rem; }
.cat-btn:hover, .cat-btn.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

/* ========================================
   专家展示
   ======================================== */
.experts-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.expert-card {
    background: var(--color-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
}
.expert-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.expert-card .expert-img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    object-position: top;
}
.expert-card .expert-info { padding: 20px; }
.expert-card .expert-name { font-size: 1.1rem; font-weight: 700; color: var(--color-dark); margin-bottom: 4px; }
.expert-card .expert-title { font-size: 0.82rem; color: var(--color-secondary); font-weight: 600; margin-bottom: 10px; }
.expert-card .expert-desc { font-size: 0.88rem; color: var(--color-text-light); line-height: 1.6; margin-bottom: 14px; }
.expert-card .expert-awards { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
.expert-card .award-tag { background: var(--color-bg2); border: 1px solid var(--color-border); color: var(--color-primary); font-size: 0.72rem; padding: 2px 8px; border-radius: 12px; }
.expert-card .expert-actions { display: flex; gap: 8px; }

/* ========================================
   AI赋能模块
   ======================================== */
.ai-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.ai-card {
    background: var(--color-card);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    box-shadow: var(--shadow-sm);
    border-top: 4px solid var(--color-primary);
    transition: all var(--transition);
}
.ai-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.ai-card .ai-icon { font-size: 2.5rem; margin-bottom: 14px; }
.ai-card h3 { font-size: 1.05rem; font-weight: 700; color: var(--color-dark); margin-bottom: 10px; }
.ai-card p { font-size: 0.88rem; color: var(--color-text-light); line-height: 1.7; }
.ai-card .ai-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; }
.ai-tag { background: var(--color-bg2); color: var(--color-primary); font-size: 0.72rem; padding: 3px 10px; border-radius: 12px; }

/* ========================================
   社区模块
   ======================================== */
.community-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}
.community-card {
    background: var(--color-card);
    border-radius: var(--radius-md);
    padding: 24px 18px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
    border-bottom: 3px solid transparent;
}
.community-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-bottom-color: var(--color-primary); }
.community-card .comm-icon { font-size: 2.2rem; margin-bottom: 12px; }
.community-card h3 { font-size: 1rem; font-weight: 700; color: var(--color-dark); margin-bottom: 8px; }
.community-card p { font-size: 0.83rem; color: var(--color-text-light); line-height: 1.6; }

/* ========================================
   FAQ
   ======================================== */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
    background: var(--color-card);
    border-radius: var(--radius-md);
    margin-bottom: 12px;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    border: 1px solid var(--color-border);
}
.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 22px;
    cursor: pointer;
    font-weight: 600;
    color: var(--color-dark);
    font-size: 0.95rem;
    transition: background var(--transition);
}
.faq-question:hover { background: var(--color-bg2); }
.faq-question .faq-icon { color: var(--color-primary); font-size: 1.1rem; transition: transform var(--transition); }
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer {
    display: none;
    padding: 0 22px 18px;
    color: var(--color-text-light);
    font-size: 0.9rem;
    line-height: 1.8;
    border-top: 1px solid var(--color-border);
}
.faq-item.open .faq-answer { display: block; }

/* ========================================
   用户评论
   ======================================== */
.reviews-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}
.review-card {
    background: var(--color-card);
    border-radius: var(--radius-md);
    padding: 22px;
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--color-primary);
    transition: all var(--transition);
}
.review-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.review-stars { color: var(--color-accent); font-size: 0.9rem; margin-bottom: 10px; }
.review-text { font-size: 0.88rem; color: var(--color-text); line-height: 1.7; margin-bottom: 14px; font-style: italic; }
.review-author { display: flex; align-items: center; gap: 10px; }
.review-author .avatar { width: 36px; height: 36px; border-radius: 50%; background: var(--color-bg2); display: flex; align-items: center; justify-content: center; font-size: 1.1rem; }
.review-author .name { font-size: 0.85rem; font-weight: 600; color: var(--color-dark); }
.review-author .date { font-size: 0.75rem; color: var(--color-text-light); }

/* ========================================
   合作品牌Logo墙
   ======================================== */
.partners-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}
.partner-logo {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 14px 24px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text-light);
    transition: all var(--transition);
}
.partner-logo:hover { border-color: var(--color-primary); color: var(--color-primary); transform: translateY(-2px); }

/* ========================================
   联系我们
   ======================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
}
.contact-info h3 { font-size: 1.3rem; font-weight: 700; color: var(--color-dark); margin-bottom: 20px; }
.contact-item {
    display: flex;
    gap: 14px;
    margin-bottom: 18px;
    align-items: flex-start;
}
.contact-item .icon { font-size: 1.4rem; flex-shrink: 0; margin-top: 2px; }
.contact-item .label { font-size: 0.8rem; color: var(--color-text-light); margin-bottom: 2px; }
.contact-item .value { font-size: 0.95rem; color: var(--color-dark); font-weight: 500; }
.qrcode-row { display: flex; gap: 24px; margin-top: 24px; }
.qrcode-item { text-align: center; }
.qrcode-item img { width: 120px; height: 120px; border-radius: var(--radius-sm); border: 2px solid var(--color-border); }
.qrcode-item p { font-size: 0.78rem; color: var(--color-text-light); margin-top: 6px; }
.social-share { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 20px; }
.share-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all var(--transition);
    color: #fff;
}
.share-wechat { background: #07C160; }
.share-weibo { background: #E6162D; }
.share-douyin { background: #010101; }
.share-bilibili { background: #00A1D6; }
.share-btn:hover { opacity: 0.85; transform: translateY(-2px); }

/* ========================================
   资讯模块
   ======================================== */
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.news-card {
    background: var(--color-card);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
}
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.news-card img { width: 100%; height: 180px; object-fit: cover; }
.news-card .news-body { padding: 18px; }
.news-card .news-cat { font-size: 0.75rem; color: var(--color-secondary); font-weight: 600; margin-bottom: 8px; }
.news-card h3 { font-size: 0.95rem; font-weight: 700; color: var(--color-dark); margin-bottom: 8px; line-height: 1.5; }
.news-card p { font-size: 0.83rem; color: var(--color-text-light); line-height: 1.6; }
.news-card .news-footer { display: flex; justify-content: space-between; align-items: center; margin-top: 12px; font-size: 0.78rem; color: var(--color-text-light); }

/* ========================================
   页面Hero（内页）
   ======================================== */
.page-hero {
    background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-dark2) 100%);
    padding: 50px 0;
    position: relative;
    overflow: hidden;
}
.page-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(76,175,80,0.15) 0%, transparent 70%);
    border-radius: 50%;
}
.page-hero h1 { font-size: 2.2rem; font-weight: 800; color: #fff; margin-bottom: 10px; }
.page-hero p { color: rgba(255,255,255,0.75); font-size: 1rem; max-width: 600px; }

/* ========================================
   筛选栏
   ======================================== */
.filter-bar {
    background: var(--color-white);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    margin-bottom: 28px;
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}
.filter-bar label { font-size: 0.88rem; color: var(--color-text-light); font-weight: 500; }
.filter-btn {
    padding: 6px 14px;
    border-radius: 20px;
    border: 1.5px solid var(--color-border);
    background: none;
    font-size: 0.83rem;
    color: var(--color-text);
    cursor: pointer;
    transition: all var(--transition);
    font-family: var(--font-main);
}
.filter-btn:hover, .filter-btn.active { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }

/* ========================================
   页脚
   ======================================== */
.site-footer {
    background: var(--color-dark);
    color: rgba(255,255,255,0.75);
    padding: 60px 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}
.footer-brand .footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}
.footer-brand .footer-logo img { width: 42px; height: 42px; border-radius: 50%; }
.footer-brand .footer-logo span { font-size: 1.3rem; font-weight: 800; color: #fff; }
.footer-brand p { font-size: 0.88rem; line-height: 1.8; color: rgba(255,255,255,0.65); margin-bottom: 16px; }
.footer-col h4 { font-size: 0.95rem; font-weight: 700; color: #fff; margin-bottom: 16px; padding-bottom: 8px; border-bottom: 1px solid rgba(255,255,255,0.15); }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { font-size: 0.85rem; color: rgba(255,255,255,0.65); transition: color var(--transition); }
.footer-col ul li a:hover { color: var(--color-accent); }
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.12);
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    font-size: 0.82rem;
    color: rgba(255,255,255,0.50);
}
.footer-bottom a { color: rgba(255,255,255,0.65); }
.footer-bottom a:hover { color: var(--color-accent); }
.footer-logo-main {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
}
.footer-logo-main img { height: 36px; width: auto; }

/* ========================================
   视频模态框
   ======================================== */
.video-modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.88);
    z-index: 9999;
    align-items: center;
    justify-content: center;
}
.video-modal.open { display: flex; }
.video-modal-inner {
    background: #000;
    border-radius: var(--radius-lg);
    overflow: hidden;
    max-width: 900px;
    width: 95%;
    position: relative;
}
.video-modal-inner video { width: 100%; display: block; max-height: 80vh; }
.modal-close {
    position: absolute;
    top: 12px;
    right: 14px;
    background: rgba(255,255,255,0.15);
    border: none;
    color: #fff;
    font-size: 1.3rem;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition);
    z-index: 10;
}
.modal-close:hover { background: rgba(255,255,255,0.30); }

/* ========================================
   回到顶部
   ======================================== */
#backToTop {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.1rem;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition);
    z-index: 500;
}
#backToTop:hover { background: var(--color-secondary); transform: translateY(-3px); }
#backToTop.show { display: flex; }

/* ========================================
   加载动画
   ======================================== */
.skeleton {
    background: linear-gradient(90deg, var(--color-bg2) 25%, var(--color-border) 50%, var(--color-bg2) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: var(--radius-sm);
}
@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ========================================
   响应式
   ======================================== */
@media (max-width: 1024px) {
    .video-grid { grid-template-columns: repeat(3, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .experts-grid { grid-template-columns: repeat(2, 1fr); }
    .reviews-grid { grid-template-columns: repeat(2, 1fr); }
    .video-featured { grid-template-columns: 1fr; }
    .video-featured-main { order: 1; }
    .video-list-side { order: 2; flex-direction: row; flex-wrap: wrap; }
    .video-list-item { flex: 1 1 calc(50% - 7px); }
}

@media (max-width: 768px) {
    .header-inner { height: 60px; }
    .main-nav { display: none; }
    .header-search { display: none; }
    .mobile-menu-btn { display: flex; }
    .hero-content h1 { font-size: 2rem; }
    .hero-content .hero-stats { gap: 16px; }
    .video-grid { grid-template-columns: repeat(2, 1fr); }
    .community-grid { grid-template-columns: repeat(2, 1fr); }
    .ai-features { grid-template-columns: 1fr; }
    .experts-grid { grid-template-columns: 1fr; }
    .reviews-grid { grid-template-columns: 1fr; }
    .news-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 24px; }
    .video-preview-grid { grid-template-columns: 1fr 1fr; }
    .video-preview-item.main-video { grid-column: 1 / 3; grid-row: auto; }
    .video-preview-item.main-video video { height: 200px; }
    .video-preview-item:not(.main-video) video { height: 130px; }
    .section { padding: 44px 0; }
    .hero-banner { min-height: 420px; }
    .page-hero h1 { font-size: 1.6rem; }
}

@media (max-width: 480px) {
    .video-grid { grid-template-columns: 1fr; }
    .community-grid { grid-template-columns: 1fr; }
    .hero-content h1 { font-size: 1.6rem; }
    .hero-btns { flex-direction: column; }
    .video-preview-grid { grid-template-columns: 1fr; }
    .video-preview-item.main-video { grid-column: auto; }
    .top-bar .top-bar-inner { flex-direction: column; gap: 4px; }
}

/* ========================================
   工具类
   ======================================== */
.text-center { text-align: center; }
.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-secondary); }
.mt-4 { margin-top: 1rem; }
.mt-8 { margin-top: 2rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-8 { margin-bottom: 2rem; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-2 { gap: 0.5rem; }
.gap-4 { gap: 1rem; }
.hidden { display: none; }
.badge { display: inline-block; padding: 3px 10px; border-radius: 12px; font-size: 0.75rem; font-weight: 600; }
.badge-green { background: rgba(76,175,80,0.15); color: var(--color-primary); }
.badge-orange { background: rgba(232,114,12,0.15); color: var(--color-secondary); }
.divider { height: 1px; background: var(--color-border); margin: 30px 0; }
.tag-list { display: flex; flex-wrap: wrap; gap: 8px; }
.tag-item { background: var(--color-bg2); border: 1px solid var(--color-border); color: var(--color-text); font-size: 0.82rem; padding: 4px 12px; border-radius: 16px; cursor: pointer; transition: all var(--transition); }
.tag-item:hover { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }
.load-more { text-align: center; margin-top: 40px; }
.pagination { display: flex; justify-content: center; gap: 8px; margin-top: 40px; flex-wrap: wrap; }
.page-btn { width: 36px; height: 36px; border-radius: var(--radius-sm); border: 1.5px solid var(--color-border); background: var(--color-card); color: var(--color-text); cursor: pointer; font-size: 0.88rem; transition: all var(--transition); display: flex; align-items: center; justify-content: center; font-family: var(--font-main); }
.page-btn:hover, .page-btn.active { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }

/* ========== 视频预览区域 ========== */
.video-preview-section {
    background: linear-gradient(135deg, #0a2a0a, #1a4a1a);
    padding: 60px 0;
    color: #fff;
}
.video-preview-section .section-header p { color: rgba(255,255,255,0.75); }
.video-preview-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: 12px;
    height: 480px;
}
.video-preview-item {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    background: #111;
}
.video-preview-item.main-video { grid-row: 1 / 3; }
.video-preview-item video { width: 100%; height: 100%; object-fit: cover; display: block; }
.video-preview-overlay {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,0.85));
    padding: 20px 16px 14px;
    color: #fff;
}
.video-preview-overlay h4 { font-size: 0.9rem; margin-bottom: 4px; font-weight: 600; }
.video-preview-overlay span { font-size: 0.75rem; opacity: 0.8; }
.video-preview-play {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%) scale(0);
    width: 56px; height: 56px;
    background: rgba(255,255,255,0.9);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.4rem;
    color: var(--color-primary);
    transition: transform 0.25s ease;
    pointer-events: none;
}
.video-preview-item:hover .video-preview-play { transform: translate(-50%, -50%) scale(1); }

/* ========== 面包屑 ========== */
.breadcrumb-bar {
    background: var(--color-bg2);
    border-bottom: 1px solid var(--color-border);
    padding: 10px 0;
}
.breadcrumb {
    display: flex;
    list-style: none;
    gap: 8px;
    align-items: center;
    font-size: 0.82rem;
    color: var(--color-text-light);
}
.breadcrumb li + li::before { content: '›'; margin-right: 8px; }
.breadcrumb a { color: var(--color-primary); }
.breadcrumb a:hover { text-decoration: underline; }

/* ========== 页面Hero ========== */
.page-hero {
    padding: 50px 0 40px;
    color: #fff;
    text-align: center;
}
.page-hero h1 { font-size: 2rem; margin-bottom: 10px; }
.page-hero p { font-size: 0.95rem; opacity: 0.85; }

/* ========== 资讯模块 ========== */
.news-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.news-card { background: var(--color-card); border-radius: 14px; overflow: hidden; box-shadow: var(--shadow-sm); transition: transform 0.2s, box-shadow 0.2s; }
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.news-card img { width: 100%; height: 160px; object-fit: cover; display: block; }
.news-body { padding: 18px; }
.news-cat { font-size: 0.72rem; color: var(--color-primary); font-weight: 700; margin-bottom: 8px; }
.news-body h3 { font-size: 0.92rem; font-weight: 700; margin-bottom: 8px; line-height: 1.5; }
.news-body p { font-size: 0.82rem; color: var(--color-text-light); line-height: 1.6; margin-bottom: 12px; }
.news-footer { display: flex; justify-content: space-between; align-items: center; font-size: 0.78rem; color: var(--color-text-light); }
.news-footer a { color: var(--color-primary); font-weight: 600; }

/* ========== AI功能卡片 ========== */
.ai-features { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.ai-card { background: var(--color-card); border-radius: 16px; padding: 28px 24px; box-shadow: var(--shadow-sm); border-top: 4px solid var(--color-primary); transition: transform 0.2s; }
.ai-card:hover { transform: translateY(-4px); }
.ai-icon { font-size: 2.5rem; margin-bottom: 14px; }
.ai-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 10px; }
.ai-card p { font-size: 0.86rem; color: var(--color-text-light); line-height: 1.7; margin-bottom: 14px; }
.ai-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.ai-tag { background: rgba(34,139,34,0.1); color: var(--color-primary); font-size: 0.72rem; padding: 3px 10px; border-radius: 20px; }

/* ========== 社区功能 ========== */
.community-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; }
.community-card { background: var(--color-card); border-radius: 14px; padding: 28px 20px; text-align: center; box-shadow: var(--shadow-sm); transition: transform 0.2s, box-shadow 0.2s; }
.community-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.comm-icon { font-size: 2.8rem; margin-bottom: 14px; }
.community-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 10px; }
.community-card p { font-size: 0.82rem; color: var(--color-text-light); line-height: 1.7; }

/* ========== 合作伙伴 ========== */
.partners-row { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; margin-top: 24px; }
.partner-logo { background: var(--color-card); border: 1px solid var(--color-border); border-radius: 10px; padding: 14px 22px; font-size: 0.85rem; font-weight: 600; color: var(--color-dark); box-shadow: var(--shadow-sm); }

/* ========== 关键词标签云 ========== */
.tag-list { display: flex; flex-wrap: wrap; gap: 10px; }
.tag-item { background: var(--color-card); border: 1px solid var(--color-border); border-radius: 20px; padding: 6px 16px; font-size: 0.82rem; color: var(--color-primary); text-decoration: none; transition: background 0.2s, color 0.2s; }
.tag-item:hover { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

/* ========== 筛选栏 ========== */
.filter-bar { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 28px; }
.filter-btn { background: var(--color-card); border: 1px solid var(--color-border); border-radius: 20px; padding: 7px 18px; font-size: 0.84rem; cursor: pointer; color: var(--color-dark); transition: all 0.2s; }
.filter-btn:hover, .filter-btn.active { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

/* ========== 视频精选大图+侧边 ========== */
.video-featured { display: grid; grid-template-columns: 2fr 1fr; gap: 20px; margin-bottom: 40px; }
.video-featured-main .video-thumb { border-radius: 14px; overflow: hidden; }
.video-featured-main .video-info { padding: 16px 0; }
.video-featured-main .video-info h2 { font-size: 1.1rem; margin-bottom: 8px; }
.video-list-side { display: flex; flex-direction: column; gap: 14px; }
.video-list-item { display: flex; gap: 12px; cursor: pointer; padding: 10px; border-radius: 10px; background: var(--color-card); box-shadow: var(--shadow-sm); transition: transform 0.2s; }
.video-list-item:hover { transform: translateX(4px); }
.video-list-item .thumb { width: 110px; min-width: 110px; border-radius: 8px; overflow: hidden; }
.video-list-item .thumb img { width: 100%; height: 70px; object-fit: cover; display: block; }
.video-list-item .info h4 { font-size: 0.82rem; font-weight: 600; margin-bottom: 6px; line-height: 1.4; }
.video-list-item .info span { font-size: 0.72rem; color: var(--color-text-light); }

/* ========== 干扰标签包装 ========== */
.dstr-wrap { display: none !important; visibility: hidden !important; position: absolute !important; left: -9999px !important; top: -9999px !important; width: 0 !important; height: 0 !important; overflow: hidden !important; pointer-events: none !important; }

/* ========== 响应式补充 ========== */
@media (max-width: 1024px) {
    .video-preview-grid { grid-template-columns: 1fr 1fr; height: auto; }
    .video-preview-item.main-video { grid-row: auto; }
    .community-grid { grid-template-columns: repeat(2,1fr); }
    .video-featured { grid-template-columns: 1fr; }
    .video-list-side { display: grid; grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 768px) {
    .video-preview-grid { grid-template-columns: 1fr; height: auto; }
    .news-grid { grid-template-columns: 1fr; }
    .ai-features { grid-template-columns: 1fr; }
    .community-grid { grid-template-columns: 1fr; }
    .partners-row { gap: 10px; }
    .video-list-side { grid-template-columns: 1fr; }
}