/* 51影视传媒 - 原创CSS样式 | jinmingstone.cn */
/* 配色方案：深紫#2D1B69 金色#D4AF37 浅紫#E8D5FF 暗底#0F0A1E 亮紫#7B5EA7 */
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","WenQuanYi Micro Hei",sans-serif;color:#E8D5FF;background:#0F0A1E;line-height:1.7}
a{color:#D4AF37;text-decoration:none;transition:color .3s}
a:hover{color:#FFD700}
img{max-width:100%;height:auto;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* 顶部导航 */
.site-header{background:linear-gradient(135deg,#1A0F3C 0%,#2D1B69 100%);border-bottom:2px solid #D4AF37;position:sticky;top:0;z-index:1000;box-shadow:0 4px 20px rgba(45,27,105,.6)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;padding:10px 0;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px}
.nav-logo img{height:50px;width:auto}
.nav-menu{display:flex;list-style:none;gap:6px}
.nav-menu li a{padding:8px 14px;border-radius:6px;font-size:.9rem;color:#E8D5FF;transition:all .3s}
.nav-menu li a:hover,.nav-menu li a.active{background:rgba(212,175,55,.15);color:#FFD700}
.mobile-toggle{display:none;background:none;border:2px solid #D4AF37;color:#D4AF37;padding:6px 10px;border-radius:4px;font-size:1.2rem;cursor:pointer}

/* 搜索框 */
.search-bar{background:rgba(45,27,105,.5);padding:12px 0;border-bottom:1px solid rgba(212,175,55,.2)}
.search-wrap{max-width:600px;margin:0 auto;display:flex;gap:8px;padding:0 20px}
.search-wrap input{flex:1;padding:10px 16px;border:1px solid #7B5EA7;border-radius:25px;background:rgba(15,10,30,.8);color:#E8D5FF;font-size:.9rem;outline:none;transition:border-color .3s}
.search-wrap input:focus{border-color:#D4AF37}
.search-wrap input::placeholder{color:#7B5EA7}
.search-wrap button{padding:10px 24px;background:linear-gradient(135deg,#D4AF37,#B8941F);color:#1A0F3C;border:none;border-radius:25px;font-weight:700;cursor:pointer;transition:transform .2s}
.search-wrap button:hover{transform:scale(1.05)}

/* Banner */
.hero-banner{position:relative;overflow:hidden;min-height:420px;display:flex;align-items:center}
.hero-banner .hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;filter:brightness(.55)}
.hero-banner .hero-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(15,10,30,.3) 0%,rgba(15,10,30,.85) 100%)}
.hero-content{position:relative;z-index:2;text-align:center;padding:60px 20px}
.hero-content h1{font-size:2.6rem;color:#FFD700;margin-bottom:16px;text-shadow:0 2px 20px rgba(212,175,55,.4)}
.hero-content p{font-size:1.15rem;color:#E8D5FF;max-width:700px;margin:0 auto 24px;line-height:1.8}
.hero-content .hero-tags{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.hero-content .hero-tags span{background:rgba(212,175,55,.15);border:1px solid rgba(212,175,55,.3);padding:6px 16px;border-radius:20px;font-size:.85rem;color:#D4AF37}

/* 通用区块 */
.section{padding:50px 0}
.section-dark{background:#0F0A1E}
.section-alt{background:linear-gradient(180deg,#150E2E 0%,#0F0A1E 100%)}
.section-title{text-align:center;margin-bottom:36px}
.section-title h2{font-size:1.9rem;color:#FFD700;margin-bottom:8px}
.section-title p{color:#B8A0D8;font-size:1rem}
.section-title h2 span{color:#E8D5FF;font-weight:400;font-size:1rem;margin-left:8px}

/* 视频卡片网格 */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.video-card{background:linear-gradient(145deg,#1A0F3C,#231550);border-radius:12px;overflow:hidden;border:1px solid rgba(123,94,167,.3);transition:transform .3s,box-shadow .3s}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 30px rgba(45,27,105,.5)}
.video-card .thumb{position:relative;padding-top:56.25%;overflow:hidden;background:#1A0F3C}
.video-card .thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .4s}
.video-card:hover .thumb img{transform:scale(1.08)}
.video-card .play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:56px;height:56px;background:rgba(212,175,55,.85);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s}
.video-card:hover .play-btn{opacity:1}
.play-btn::after{content:'';display:block;width:0;height:0;border-style:solid;border-width:10px 0 10px 18px;border-color:transparent transparent transparent #1A0F3C;margin-left:3px}
.video-card .card-body{padding:14px 16px}
.video-card .card-body h3{font-size:1rem;color:#E8D5FF;margin-bottom:6px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-card .card-meta{display:flex;justify-content:space-between;font-size:.8rem;color:#7B5EA7}
.video-card .card-meta .views::before{content:'▶ '}
.video-card .card-tags{margin-top:8px;display:flex;gap:6px;flex-wrap:wrap}
.video-card .card-tags span{background:rgba(123,94,167,.2);padding:2px 10px;border-radius:10px;font-size:.75rem;color:#B8A0D8}

/* 专家展示 */
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.expert-card{background:linear-gradient(145deg,#1A0F3C,#231550);border-radius:12px;padding:24px;text-align:center;border:1px solid rgba(123,94,167,.3);transition:transform .3s}
.expert-card:hover{transform:translateY(-4px)}
.expert-card .avatar{width:100px;height:100px;border-radius:50%;margin:0 auto 14px;border:3px solid #D4AF37;overflow:hidden}
.expert-card .avatar img{width:100%;height:100%;object-fit:cover}
.expert-card h3{color:#FFD700;font-size:1.1rem;margin-bottom:4px}
.expert-card .role{color:#7B5EA7;font-size:.85rem;margin-bottom:10px}
.expert-card p{font-size:.88rem;color:#B8A0D8;line-height:1.6;margin-bottom:14px}
.expert-card .btn-group{display:flex;gap:8px;justify-content:center}

/* 按钮 */
.btn{display:inline-block;padding:8px 20px;border-radius:25px;font-size:.85rem;font-weight:600;transition:all .3s;cursor:pointer;border:none}
.btn-gold{background:linear-gradient(135deg,#D4AF37,#B8941F);color:#1A0F3C}
.btn-gold:hover{background:linear-gradient(135deg,#FFD700,#D4AF37);transform:scale(1.05);color:#1A0F3C}
.btn-outline{background:transparent;border:1px solid #D4AF37;color:#D4AF37}
.btn-outline:hover{background:rgba(212,175,55,.15)}

/* FAQ */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:linear-gradient(145deg,#1A0F3C,#231550);border:1px solid rgba(123,94,167,.3);border-radius:10px;margin-bottom:12px;overflow:hidden}
.faq-q{padding:16px 20px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;color:#E8D5FF;transition:background .3s}
.faq-q:hover{background:rgba(212,175,55,.08)}
.faq-q::after{content:'+';font-size:1.4rem;color:#D4AF37;transition:transform .3s}
.faq-item.open .faq-q::after{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease;padding:0 20px}
.faq-item.open .faq-a{max-height:300px;padding:0 20px 16px}
.faq-a p{color:#B8A0D8;font-size:.92rem;line-height:1.7}

/* 用户评论 */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px}
.review-card{background:linear-gradient(145deg,#1A0F3C,#231550);border-radius:12px;padding:20px;border:1px solid rgba(123,94,167,.3)}
.review-card .stars{color:#D4AF37;margin-bottom:8px;font-size:1.1rem}
.review-card blockquote{color:#E8D5FF;font-size:.92rem;line-height:1.7;margin-bottom:12px;font-style:italic}
.review-card .reviewer{display:flex;align-items:center;gap:10px}
.review-card .reviewer .r-avatar{width:36px;height:36px;border-radius:50%;background:#7B5EA7;display:flex;align-items:center;justify-content:center;color:#FFD700;font-weight:700;font-size:.9rem}
.review-card .reviewer .r-info{font-size:.82rem;color:#7B5EA7}
.review-card .reviewer .r-info strong{color:#B8A0D8;display:block}

/* 合作品牌墙 */
.brand-wall{display:flex;flex-wrap:wrap;gap:20px;justify-content:center;align-items:center}
.brand-wall .brand-item{background:rgba(45,27,105,.4);padding:16px 28px;border-radius:10px;border:1px solid rgba(123,94,167,.2);color:#B8A0D8;font-size:.95rem;font-weight:600;transition:all .3s}
.brand-wall .brand-item:hover{border-color:#D4AF37;color:#FFD700}

/* How-To指南 */
.howto-steps{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:20px;counter-reset:step}
.howto-step{background:linear-gradient(145deg,#1A0F3C,#231550);border-radius:12px;padding:24px;text-align:center;border:1px solid rgba(123,94,167,.3);counter-increment:step;position:relative}
.howto-step::before{content:counter(step);position:absolute;top:-14px;left:50%;transform:translateX(-50%);width:32px;height:32px;background:#D4AF37;color:#1A0F3C;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.95rem}
.howto-step h4{color:#FFD700;margin:10px 0 8px;font-size:1rem}
.howto-step p{color:#B8A0D8;font-size:.88rem}

/* 联系信息 */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.contact-card{background:linear-gradient(145deg,#1A0F3C,#231550);border-radius:12px;padding:24px;border:1px solid rgba(123,94,167,.3)}
.contact-card h3{color:#FFD700;margin-bottom:12px;font-size:1.1rem}
.contact-card p{color:#B8A0D8;font-size:.9rem;margin-bottom:6px}
.contact-card .qr-img{width:160px;margin:12px auto 0;border-radius:8px;overflow:hidden}

/* 社交分享 */
.share-bar{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;padding:20px 0}
.share-bar a{display:flex;align-items:center;gap:6px;padding:8px 18px;border-radius:25px;font-size:.85rem;color:#E8D5FF;border:1px solid rgba(123,94,167,.3);transition:all .3s}
.share-bar a:hover{border-color:#D4AF37;color:#FFD700;background:rgba(212,175,55,.1)}

/* 页脚 */
.site-footer{background:linear-gradient(180deg,#1A0F3C,#0A0614);border-top:2px solid #D4AF37;padding:40px 0 20px}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:30px;margin-bottom:30px}
.footer-col h4{color:#FFD700;margin-bottom:14px;font-size:1rem}
.footer-col p,.footer-col a{color:#B8A0D8;font-size:.88rem;display:block;margin-bottom:6px}
.footer-col a:hover{color:#FFD700}
.footer-bottom{text-align:center;padding-top:20px;border-top:1px solid rgba(123,94,167,.2);color:#7B5EA7;font-size:.82rem}
.footer-bottom a{color:#D4AF37}

/* 面包屑 */
.breadcrumb{padding:12px 0;font-size:.85rem;color:#7B5EA7}
.breadcrumb a{color:#B8A0D8}
.breadcrumb span{margin:0 6px;color:#7B5EA7}

/* 内页通用 */
.page-hero{background:linear-gradient(135deg,#1A0F3C,#2D1B69);padding:40px 0;text-align:center;border-bottom:1px solid rgba(212,175,55,.2)}
.page-hero h1{font-size:2rem;color:#FFD700;margin-bottom:8px}
.page-hero p{color:#B8A0D8;font-size:1rem}
.page-content{padding:40px 0}
.page-content h2{color:#FFD700;font-size:1.5rem;margin:30px 0 14px}
.page-content h3{color:#E8D5FF;font-size:1.2rem;margin:20px 0 10px}
.page-content p{color:#B8A0D8;line-height:1.8;margin-bottom:14px}
.page-content ul,.page-content ol{color:#B8A0D8;margin:10px 0 14px 24px}
.page-content li{margin-bottom:6px}

/* 响应式 */
@media(max-width:768px){
  .nav-menu{display:none;position:absolute;top:100%;left:0;right:0;background:#1A0F3C;flex-direction:column;padding:16px;border-bottom:2px solid #D4AF37}
  .nav-menu.show{display:flex}
  .mobile-toggle{display:block}
  .hero-content h1{font-size:1.8rem}
  .hero-content p{font-size:1rem}
  .video-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}
  .section{padding:30px 0}
  .section-title h2{font-size:1.5rem}
  .expert-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:480px){
  .video-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .hero-banner{min-height:320px}
  .hero-content h1{font-size:1.5rem}
  .review-grid{grid-template-columns:1fr}
}