/* 
 * 黑料网 - erush-tech.cn
 * 全新原创CSS样式
 * 创建时间: 2026-01-03
 */

/* 基础重置 */
*{margin:0;padding:0;box-sizing:border-box}
html{font-size:16px;scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;line-height:1.6;color:#1a1a2e;background:#fafbfc}
a{text-decoration:none;color:inherit;transition:color .2s}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}

/* 布局容器 */
.wrapper{max-width:1200px;margin:0 auto;padding:0 20px}
.flex{display:flex}
.flex-center{display:flex;align-items:center;justify-content:center}
.flex-between{display:flex;align-items:center;justify-content:space-between}
.grid{display:grid}

/* 顶部导航 */
.site-header{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);padding:15px 0;position:sticky;top:0;z-index:1000;box-shadow:0 2px 20px rgba(102,126,234,.3)}
.site-header .wrapper{display:flex;align-items:center;justify-content:space-between}
.logo-area{display:flex;align-items:center;gap:12px}
.logo-area img{height:40px;width:auto;border-radius:8px}
.logo-area span{font-size:1.5rem;font-weight:700;color:#fff;letter-spacing:1px}
.main-nav{display:flex;gap:30px}
.main-nav a{color:rgba(255,255,255,.9);font-size:.95rem;font-weight:500;padding:8px 0;position:relative}
.main-nav a:hover{color:#fff}
.main-nav a::after{content:'';position:absolute;bottom:0;left:0;width:0;height:2px;background:#fff;transition:width .3s}
.main-nav a:hover::after{width:100%}

/* 英雄区域 */
.hero-section{background:linear-gradient(135deg,#1a1a2e 0%,#16213e 100%);padding:80px 0;color:#fff;text-align:center}
.hero-section h1{font-size:2.8rem;margin-bottom:20px;background:linear-gradient(90deg,#667eea,#764ba2,#f093fb);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-section p{font-size:1.2rem;color:rgba(255,255,255,.8);max-width:700px;margin:0 auto 30px}
.hero-btn{display:inline-block;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:14px 40px;border-radius:30px;font-weight:600;font-size:1rem;transition:transform .3s,box-shadow .3s}
.hero-btn:hover{transform:translateY(-3px);box-shadow:0 10px 30px rgba(102,126,234,.4)}

/* 视频卡片网格 */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:25px}
.video-card{background:#fff;border-radius:16px;overflow:hidden;box-shadow:0 4px 20px rgba(0,0,0,.08);transition:transform .3s,box-shadow .3s}
.video-card:hover{transform:translateY(-8px);box-shadow:0 12px 40px rgba(0,0,0,.15)}
.video-thumb{position:relative;aspect-ratio:16/9;overflow:hidden}
.video-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.video-card:hover .video-thumb img{transform:scale(1.08)}
.play-overlay{position:absolute;inset:0;background:rgba(0,0,0,.3);display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s}
.video-card:hover .play-overlay{opacity:1}
.play-btn{width:60px;height:60px;background:rgba(255,255,255,.95);border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 15px rgba(0,0,0,.2)}
.play-btn::after{content:'';border-style:solid;border-width:10px 0 10px 18px;border-color:transparent transparent transparent #667eea;margin-left:4px}
.video-info{padding:18px}
.video-info h3{font-size:1rem;font-weight:600;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;gap:15px;font-size:.85rem;color:#666}
.video-meta span{display:flex;align-items:center;gap:4px}

/* 内容区块 */
.content-block{padding:70px 0}
.content-block.alt-bg{background:#f0f2f5}
.block-header{text-align:center;margin-bottom:50px}
.block-header h2{font-size:2rem;color:#1a1a2e;margin-bottom:12px}
.block-header p{color:#666;font-size:1.05rem}

/* 功能网格 */
.feature-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:25px}
.feature-item{background:#fff;padding:30px;border-radius:16px;text-align:center;box-shadow:0 4px 20px rgba(0,0,0,.06);transition:transform .3s}
.feature-item:hover{transform:translateY(-5px)}
.feature-item h4{color:#667eea;font-size:1.1rem;margin-bottom:12px}
.feature-item p{color:#666;font-size:.95rem;line-height:1.7}

/* 专家网格 */
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:25px}
.expert-card{background:#fff;border-radius:20px;padding:30px;text-align:center;box-shadow:0 4px 25px rgba(0,0,0,.07);transition:transform .3s}
.expert-card:hover{transform:translateY(-5px)}
.expert-card img{width:100px;height:100px;border-radius:50%;object-fit:cover;margin:0 auto 20px;border:4px solid #667eea}
.expert-card h4{font-size:1.1rem;margin-bottom:5px}
.expert-card .title{color:#667eea;font-size:.9rem;margin-bottom:15px}
.expert-card p{font-size:.9rem;color:#666;line-height:1.7;margin-bottom:12px}
.expert-card .credentials{font-size:.8rem;color:#888;background:#f8f9fa;padding:12px;border-radius:8px;margin-bottom:15px}
.contact-btn{display:inline-block;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:10px 25px;border-radius:25px;font-size:.9rem;transition:transform .3s}
.contact-btn:hover{transform:scale(1.05)}

/* 评价网格 */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:25px}
.review-card{background:#fff;padding:30px;border-radius:16px;box-shadow:0 4px 20px rgba(0,0,0,.06)}
.review-card .stars{color:#ffc107;font-size:1.3rem;margin-bottom:15px;letter-spacing:2px}
.review-card p{color:#555;font-style:italic;font-size:1rem;line-height:1.8;margin-bottom:15px}
.review-card .reviewer{color:#888;font-size:.9rem}

/* 数据统计 */
.stats-row{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;text-align:center}
.stat-item{background:linear-gradient(135deg,#667eea,#764ba2);padding:40px 20px;border-radius:16px;color:#fff}
.stat-item .num{font-size:2.5rem;font-weight:700;margin-bottom:8px}
.stat-item .label{font-size:1rem;opacity:.9}

/* 合作品牌 */
.partner-grid{display:flex;justify-content:center;gap:40px;flex-wrap:wrap}
.partner-item{background:#fff;padding:25px;border-radius:16px;box-shadow:0 4px 20px rgba(0,0,0,.06);transition:transform .3s}
.partner-item:hover{transform:scale(1.05)}
.partner-item img{width:150px;height:auto}

/* FAQ列表 */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#fff;padding:25px 30px;border-radius:16px;margin-bottom:15px;box-shadow:0 4px 20px rgba(0,0,0,.06)}
.faq-item h4{color:#1a1a2e;font-size:1.05rem;margin-bottom:12px}
.faq-item p{color:#666;font-size:.95rem;line-height:1.8}

/* 页脚 */
.site-footer{background:#1a1a2e;color:#fff;padding:60px 0 30px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer-brand img{height:45px;margin-bottom:15px;border-radius:8px}
.footer-brand p{color:rgba(255,255,255,.7);font-size:.95rem;line-height:1.8}
.footer-col h5{font-size:1rem;margin-bottom:20px;color:#fff}
.footer-col a,.footer-col p{display:block;color:rgba(255,255,255,.7);padding:6px 0;font-size:.9rem;transition:color .2s}
.footer-col a:hover{color:#667eea}
.footer-qr{display:flex;gap:15px;margin-top:10px}
.footer-qr img{width:80px;height:80px;border-radius:8px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:25px;text-align:center;color:rgba(255,255,255,.6);font-size:.85rem}

/* 面包屑 */
.breadcrumb{padding:15px 0;font-size:.9rem;color:#666}
.breadcrumb a{color:#667eea}
.breadcrumb span{margin:0 8px}

/* 分享按钮 */
.share-box{display:flex;gap:15px;justify-content:center}
.share-btn{width:50px;height:50px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.2rem;font-weight:700;transition:transform .2s}
.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:#00a1d6}

/* MCP聊天按钮 */
#mcp-chat-btn{position:fixed;bottom:30px;right:30px;width:60px;height:60px;background:linear-gradient(135deg,#667eea,#764ba2);border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 4px 20px rgba(102,126,234,.4);transition:transform .3s;z-index:1000}
#mcp-chat-btn:hover{transform:scale(1.1)}
#mcp-chat-btn span{font-size:1.5rem}

/* 响应式 */
@media(max-width:992px){
.footer-grid{grid-template-columns:1fr 1fr}
.stats-row{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
.site-header .wrapper{flex-direction:column;gap:15px}
.main-nav{gap:15px;flex-wrap:wrap;justify-content:center}
.hero-section h1{font-size:2rem}
.video-grid{grid-template-columns:1fr}
.footer-grid{grid-template-columns:1fr}
.stats-row{grid-template-columns:1fr}
.expert-grid{grid-template-columns:1fr}
.review-grid{grid-template-columns:1fr}
}