/* ========================================
   四虎影视写真传媒 - 全新原创样式表
   配色：酒红(#8B1A2B) + 玫瑰金(#B76E79) + 深灰(#1C1C28)
   ======================================== */

/* 基础重置 */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;color:#2d2d3a;background:#faf8f6;line-height:1.7}
a{text-decoration:none;color:inherit;transition:color .3s}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}

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

/* 顶部导航 */
.site-header{background:#1C1C28;position:sticky;top:0;z-index:1000;box-shadow:0 2px 20px rgba(0,0,0,.3)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;max-width:1200px;margin:0 auto}
.logo-link{display:flex;align-items:center;gap:10px}
.logo-link img{height:48px;width:auto}
.main-nav{display:flex;align-items:center;gap:6px}
.main-nav a{color:#e8ddd5;font-size:14px;padding:8px 14px;border-radius:6px;transition:all .3s;font-weight:500}
.main-nav a:hover,.main-nav a.active{background:#8B1A2B;color:#fff}
.mobile-menu-btn{display:none;background:none;border:none;color:#e8ddd5;font-size:24px;cursor:pointer}

/* 搜索框 */
.search-bar{background:linear-gradient(135deg,#8B1A2B 0%,#5a1019 100%);padding:10px 0}
.search-bar .container{display:flex;justify-content:center}
.search-wrap{position:relative;width:100%;max-width:560px}
.search-wrap input{width:100%;padding:10px 48px 10px 18px;border:2px solid rgba(255,255,255,.2);border-radius:24px;background:rgba(255,255,255,.1);color:#fff;font-size:14px;outline:none;transition:border-color .3s}
.search-wrap input::placeholder{color:rgba(255,255,255,.5)}
.search-wrap input:focus{border-color:#B76E79}
.search-wrap button{position:absolute;right:4px;top:50%;transform:translateY(-50%);background:#B76E79;border:none;color:#fff;width:36px;height:36px;border-radius:50%;cursor:pointer;font-size:16px;transition:background .3s}
.search-wrap button:hover{background:#8B1A2B}

/* 面包屑 */
.breadcrumb{padding:14px 0;font-size:13px;color:#888}
.breadcrumb a{color:#8B1A2B}
.breadcrumb a:hover{text-decoration:underline}
.breadcrumb span{margin:0 6px;color:#bbb}

/* Hero区域 */
.hero-section{position:relative;height:520px;overflow:hidden;display:flex;align-items:center}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;filter:brightness(.55)}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(to right,rgba(28,28,40,.85) 0%,rgba(28,28,40,.3) 100%)}
.hero-content{position:relative;z-index:2;max-width:600px;padding:0 40px}
.hero-content h1{font-size:38px;color:#fff;margin-bottom:16px;line-height:1.3;text-shadow:0 2px 8px rgba(0,0,0,.4)}
.hero-content h1 em{font-style:normal;color:#B76E79}
.hero-content p{color:rgba(255,255,255,.8);font-size:16px;margin-bottom:24px;line-height:1.8}
.hero-btn{display:inline-block;padding:12px 32px;background:linear-gradient(135deg,#8B1A2B,#B76E79);color:#fff;border-radius:30px;font-size:15px;font-weight:600;transition:transform .3s,box-shadow .3s}
.hero-btn:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(139,26,43,.4)}

/* 区块标题 */
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:30px;color:#1C1C28;margin-bottom:8px;position:relative;display:inline-block}
.section-title h2::after{content:'';position:absolute;bottom:-8px;left:50%;transform:translateX(-50%);width:60px;height:3px;background:linear-gradient(90deg,#8B1A2B,#B76E79);border-radius:2px}
.section-title p{color:#777;font-size:14px;margin-top:16px}

/* 视频卡片网格 */
.video-section{padding:60px 0;background:#fff}
.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.video-card{border-radius:12px;overflow:hidden;background:#fff;box-shadow:0 4px 16px rgba(0,0,0,.06);transition:transform .3s,box-shadow .3s}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 32px rgba(139,26,43,.12)}
.video-thumb{position:relative;padding-top:75%;overflow:hidden;cursor:pointer}
.video-thumb img,.video-thumb video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.video-play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%) scale(0);width:56px;height:56px;background:rgba(139,26,43,.85);border-radius:50%;display:flex;align-items:center;justify-content:center;transition:transform .3s;z-index:3}
.video-play-btn::after{content:'';border:solid #fff;border-width:8px 0 8px 14px;border-color:transparent transparent transparent #fff;margin-left:3px}
.video-thumb:hover .video-play-btn{transform:translate(-50%,-50%) scale(1)}
.video-duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.7);color:#fff;font-size:12px;padding:2px 8px;border-radius:4px;z-index:3}
.video-tag{position:absolute;top:8px;left:8px;background:#8B1A2B;color:#fff;font-size:11px;padding:3px 10px;border-radius:12px;z-index:3}
.video-info{padding:14px 16px}
.video-info h3{font-size:15px;color:#1C1C28;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;line-height:1.5}
.video-meta{display:flex;align-items:center;gap:14px;font-size:12px;color:#999}
.video-meta span{display:flex;align-items:center;gap:3px}

/* 娱乐专区 */
.entertain-section{padding:60px 0;background:#f5f0ec}
.entertain-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.entertain-card{border-radius:14px;overflow:hidden;position:relative;height:280px;cursor:pointer}
.entertain-card img{width:100%;height:100%;object-fit:cover;transition:transform .6s}
.entertain-card:hover img{transform:scale(1.08)}
.entertain-card .card-overlay{position:absolute;inset:0;background:linear-gradient(to top,rgba(28,28,40,.8) 0%,transparent 60%);display:flex;flex-direction:column;justify-content:flex-end;padding:20px}
.entertain-card h3{color:#fff;font-size:18px;margin-bottom:4px}
.entertain-card p{color:rgba(255,255,255,.7);font-size:13px}

/* AI赋能 */
.ai-section{padding:60px 0;background:#1C1C28;color:#fff}
.ai-section .section-title h2{color:#fff}
.ai-section .section-title p{color:rgba(255,255,255,.6)}
.ai-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.ai-card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.08);border-radius:14px;padding:32px 24px;text-align:center;transition:transform .3s,background .3s}
.ai-card:hover{transform:translateY(-4px);background:rgba(139,26,43,.15)}
.ai-icon{width:64px;height:64px;margin:0 auto 18px;background:linear-gradient(135deg,#8B1A2B,#B76E79);border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:28px}
.ai-card h3{font-size:18px;margin-bottom:10px;color:#B76E79}
.ai-card p{font-size:14px;color:rgba(255,255,255,.65);line-height:1.7}

/* 弹幕区域 */
.danmaku-section{padding:40px 0;background:linear-gradient(135deg,#2a1520,#1C1C28);overflow:hidden;position:relative}
.danmaku-container{height:120px;position:relative;overflow:hidden}
.danmaku-item{position:absolute;white-space:nowrap;color:rgba(255,255,255,.7);font-size:14px;padding:4px 16px;background:rgba(255,255,255,.06);border-radius:20px;animation:danmakuScroll linear infinite}
@keyframes danmakuScroll{from{transform:translateX(100vw)}to{transform:translateX(-100%)}}

/* 专家展示 */
.expert-section{padding:60px 0;background:#fff}
.expert-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.expert-card{text-align:center;padding:30px 20px;border-radius:14px;background:#faf8f6;border:1px solid #ece6e0;transition:box-shadow .3s}
.expert-card:hover{box-shadow:0 8px 28px rgba(139,26,43,.1)}
.expert-avatar{width:100px;height:100px;border-radius:50%;margin:0 auto 16px;overflow:hidden;border:3px solid #B76E79}
.expert-avatar img{width:100%;height:100%;object-fit:cover}
.expert-card h3{font-size:18px;color:#1C1C28;margin-bottom:4px}
.expert-role{color:#8B1A2B;font-size:13px;font-weight:600;margin-bottom:10px}
.expert-credentials{font-size:12px;color:#888;margin-bottom:12px;line-height:1.8}
.expert-awards{display:flex;flex-wrap:wrap;justify-content:center;gap:6px;margin-bottom:12px}
.expert-awards span{font-size:11px;background:#f5f0ec;color:#8B1A2B;padding:3px 10px;border-radius:10px}
.expert-social{display:flex;justify-content:center;gap:10px;margin-bottom:14px}
.expert-social a{width:30px;height:30px;border-radius:50%;background:#8B1A2B;color:#fff;display:flex;align-items:center;justify-content:center;font-size:13px;transition:background .3s}
.expert-social a:hover{background:#B76E79}
.expert-actions{display:flex;justify-content:center;gap:10px}
.expert-actions a{padding:6px 16px;border-radius:20px;font-size:12px;font-weight:600;transition:all .3s}
.expert-actions .btn-primary{background:#8B1A2B;color:#fff}
.expert-actions .btn-primary:hover{background:#B76E79}
.expert-actions .btn-outline{border:1px solid #8B1A2B;color:#8B1A2B}
.expert-actions .btn-outline:hover{background:#8B1A2B;color:#fff}

/* FAQ */
.faq-section{padding:60px 0;background:#f5f0ec}
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#fff;border-radius:10px;margin-bottom:12px;overflow:hidden;border:1px solid #ece6e0}
.faq-question{padding:18px 24px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-size:15px;font-weight:600;color:#1C1C28;transition:background .3s}
.faq-question:hover{background:#faf8f6}
.faq-question::after{content:'+';font-size:22px;color:#8B1A2B;transition:transform .3s;font-weight:300}
.faq-item.active .faq-question::after{transform:rotate(45deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .4s ease;padding:0 24px}
.faq-item.active .faq-answer{max-height:300px;padding:0 24px 18px}
.faq-answer p{font-size:14px;color:#666;line-height:1.8}

/* 用户评论 */
.review-section{padding:60px 0;background:#fff}
.review-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.review-card{padding:24px;border-radius:12px;background:#faf8f6;border:1px solid #ece6e0;position:relative}
.review-card::before{content:'\201C';position:absolute;top:12px;left:18px;font-size:48px;color:#B76E79;opacity:.3;font-family:Georgia,serif}
.review-stars{color:#B76E79;font-size:14px;margin-bottom:10px;letter-spacing:2px}
.review-text{font-size:14px;color:#555;line-height:1.8;margin-bottom:14px;padding-left:8px}
.review-author{display:flex;align-items:center;gap:10px;font-size:13px}
.review-author strong{color:#1C1C28}
.review-author span{color:#999}

/* 关于我们 */
.about-section{padding:60px 0;background:#f5f0ec}
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.about-text h3{font-size:22px;color:#1C1C28;margin-bottom:14px}
.about-text p{font-size:14px;color:#666;line-height:1.9;margin-bottom:14px}
.about-stats{display:flex;gap:30px;margin-top:20px}
.stat-item{text-align:center}
.stat-item .num{font-size:32px;font-weight:700;color:#8B1A2B}
.stat-item .label{font-size:12px;color:#888;margin-top:4px}
.about-img{border-radius:14px;overflow:hidden;box-shadow:0 8px 28px rgba(0,0,0,.1)}

/* 联系我们 */
.contact-section{padding:60px 0;background:#1C1C28;color:#fff}
.contact-section .section-title h2{color:#fff}
.contact-section .section-title p{color:rgba(255,255,255,.6)}
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.contact-card{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.08);border-radius:12px;padding:28px 20px;text-align:center}
.contact-card h4{color:#B76E79;font-size:16px;margin-bottom:12px}
.contact-card p{font-size:13px;color:rgba(255,255,255,.65);line-height:1.8}
.contact-card img{width:120px;height:120px;margin:12px auto 0;border-radius:8px}

/* How-To指南 */
.howto-section{padding:60px 0;background:#fff}
.howto-steps{display:flex;gap:24px;justify-content:center;flex-wrap:wrap}
.howto-step{flex:1;min-width:200px;max-width:260px;text-align:center;padding:24px 16px}
.step-num{width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,#8B1A2B,#B76E79);color:#fff;display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:700;margin:0 auto 14px}
.howto-step h4{font-size:16px;color:#1C1C28;margin-bottom:8px}
.howto-step p{font-size:13px;color:#777;line-height:1.7}

/* 合作品牌 */
.partner-section{padding:50px 0;background:#faf8f6;text-align:center}
.partner-logos{display:flex;justify-content:center;gap:40px;flex-wrap:wrap;align-items:center;opacity:.5;filter:grayscale(1);transition:filter .3s}
.partner-logos:hover{filter:grayscale(0);opacity:.8}
.partner-logos span{font-size:18px;font-weight:700;color:#555;padding:10px 20px}

/* 社交分享 */
.share-section{padding:30px 0;background:#f5f0ec;text-align:center}
.share-btns{display:flex;justify-content:center;gap:14px;margin-top:12px}
.share-btns a{width:42px;height:42px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:16px;transition:transform .3s}
.share-btns a:hover{transform:scale(1.15)}
.share-wechat{background:#07c160}
.share-weibo{background:#e6162d}
.share-douyin{background:#111}
.share-bilibili{background:#00a1d6}

/* 资讯动态 */
.news-section{padding:60px 0;background:#fff}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{padding:20px;border-radius:10px;border:1px solid #ece6e0;transition:box-shadow .3s}
.news-card:hover{box-shadow:0 6px 20px rgba(0,0,0,.06)}
.news-date{font-size:12px;color:#B76E79;margin-bottom:8px}
.news-card h4{font-size:15px;color:#1C1C28;margin-bottom:8px;line-height:1.5}
.news-card p{font-size:13px;color:#888;line-height:1.7}

/* 页脚 */
.site-footer{background:#131320;color:rgba(255,255,255,.6);padding:40px 0 20px}
.footer-top{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px;padding-bottom:30px;border-bottom:1px solid rgba(255,255,255,.08)}
.footer-brand img{height:40px;margin-bottom:12px}
.footer-brand p{font-size:13px;line-height:1.8}
.footer-col h4{color:#B76E79;font-size:14px;margin-bottom:14px}
.footer-col a{display:block;font-size:13px;color:rgba(255,255,255,.5);padding:3px 0;transition:color .3s}
.footer-col a:hover{color:#B76E79}
.footer-qr{display:flex;gap:16px;margin-top:8px}
.footer-qr img{width:80px;height:80px;border-radius:6px}
.footer-bottom{text-align:center;padding-top:20px;font-size:12px;color:rgba(255,255,255,.35)}

/* 内页Hero */
.inner-hero{height:320px;position:relative;display:flex;align-items:center;justify-content:center;text-align:center}
.inner-hero .hero-bg{filter:brightness(.4)}
.inner-hero h1{position:relative;z-index:2;font-size:34px;color:#fff}
.inner-hero p{position:relative;z-index:2;color:rgba(255,255,255,.7);font-size:15px;margin-top:10px}

/* 内页内容 */
.inner-content{padding:50px 0}
.inner-content h2{font-size:24px;color:#1C1C28;margin-bottom:16px}
.inner-content h3{font-size:20px;color:#8B1A2B;margin:24px 0 12px}
.inner-content p{font-size:14px;color:#555;line-height:1.9;margin-bottom:14px}

/* 响应式 */
@media(max-width:1024px){
.video-grid{grid-template-columns:repeat(3,1fr)}
.footer-top{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
.header-inner{flex-wrap:wrap}
.main-nav{display:none;width:100%;flex-direction:column;padding-top:10px}
.main-nav.active{display:flex}
.mobile-menu-btn{display:block}
.hero-section{height:400px}
.hero-content h1{font-size:26px}
.video-grid{grid-template-columns:repeat(2,1fr)}
.entertain-grid{grid-template-columns:1fr}
.ai-grid{grid-template-columns:1fr}
.expert-grid{grid-template-columns:1fr}
.review-grid{grid-template-columns:1fr}
.about-grid{grid-template-columns:1fr}
.contact-grid{grid-template-columns:1fr}
.news-grid{grid-template-columns:1fr}
.footer-top{grid-template-columns:1fr}
.howto-steps{flex-direction:column;align-items:center}
}
@media(max-width:480px){
.video-grid{grid-template-columns:1fr}
.hero-section{height:340px}
.hero-content{padding:0 20px}
.hero-content h1{font-size:22px}
}

/* 懒加载 */
img[loading="lazy"]{opacity:0;transition:opacity .5s}
img[loading="lazy"].loaded,img[loading="lazy"][src]{opacity:1}

/* 动画 */
.fade-up{opacity:0;transform:translateY(30px);transition:opacity .6s,transform .6s}
.fade-up.visible{opacity:1;transform:translateY(0)}