/* ============================================
   91吃瓜每日投稿 - 主样式表
   品牌定位：国内影视传媒公司 + 视频社区
   域名：jszvv.cn
   ============================================ */

/* === 基础重置 === */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","WenQuanYi Micro Hei",sans-serif;color:#333;background:#f8f9fa;line-height:1.7}
a{text-decoration:none;color:inherit;transition:color .3s}
a:hover{color:#ff6b4a}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* === 头部导航 === */
.site-header{background:#1a1a2e;position:sticky;top:0;z-index:1000;box-shadow:0 2px 10px 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-area{display:flex;align-items:center;gap:10px}
.logo-area img{height:42px;width:auto}
.logo-area .brand-name{color:#fff;font-size:1.2rem;font-weight:700;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:0}
.main-nav a{color:#ccc;padding:10px 14px;font-size:.9rem;transition:all .3s;border-radius:4px}
.main-nav a:hover,.main-nav a.active{color:#fff;background:rgba(255,107,74,.2)}
.mobile-menu-btn{display:none;background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer}

/* === 搜索框 === */
.search-bar{background:linear-gradient(135deg,#16213e,#1a1a2e);padding:16px 0}
.search-bar .container{display:flex;justify-content:center}
.search-form{display:flex;max-width:600px;width:100%;background:#fff;border-radius:30px;overflow:hidden;box-shadow:0 2px 15px rgba(0,0,0,.15)}
.search-form input{flex:1;border:none;padding:12px 20px;font-size:.95rem;outline:none;background:transparent}
.search-form button{background:linear-gradient(135deg,#ff6b4a,#ff8e53);color:#fff;border:none;padding:12px 28px;cursor:pointer;font-size:.95rem;transition:opacity .3s}
.search-form button:hover{opacity:.85}

/* === Hero Banner === */
.hero-section{position:relative;height:480px;overflow:hidden;background:#1a1a2e}
.hero-section img{width:100%;height:100%;object-fit:cover;opacity:.6}
.hero-overlay{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:20px}
.hero-overlay h1{color:#fff;font-size:2.4rem;margin-bottom:16px;text-shadow:0 2px 10px rgba(0,0,0,.5)}
.hero-overlay p{color:#ddd;font-size:1.1rem;max-width:700px;margin-bottom:24px}
.hero-overlay .hero-tags{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}
.hero-overlay .hero-tags span{background:rgba(255,107,74,.8);color:#fff;padding:6px 16px;border-radius:20px;font-size:.85rem}
.btn-primary{display:inline-block;background:linear-gradient(135deg,#ff6b4a,#ff8e53);color:#fff;padding:12px 32px;border-radius:30px;font-size:1rem;font-weight:600;transition:transform .3s,box-shadow .3s;border:none;cursor:pointer}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(255,107,74,.4);color:#fff}

/* === 通用板块 === */
.section{padding:60px 0}
.section-alt{background:#fff}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:1.8rem;color:#1a1a2e;margin-bottom:8px}
.section-title p{color:#666;font-size:1rem}
.section-title .highlight{color:#ff6b4a}

/* === 视频卡片网格 === */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.video-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 4px 15px rgba(0,0,0,.08);transition:transform .3s,box-shadow .3s}
.video-card:hover{transform:translateY(-5px);box-shadow:0 8px 30px rgba(0,0,0,.15)}
.video-thumb{position:relative;padding-top:56.25%;overflow:hidden}
.video-thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s}
.video-card:hover .video-thumb img{transform:scale(1.05)}
.play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:60px;height:60px;background:rgba(255,107,74,.9);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:"";border-left:20px solid #fff;border-top:12px solid transparent;border-bottom:12px solid transparent;margin-left:4px}
.video-info{padding:16px}
.video-info h3{font-size:1rem;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;gap:12px;color:#999;font-size:.8rem}
.video-meta span{display:flex;align-items:center;gap:4px}
.video-tag{display:inline-block;background:#f0f0f0;color:#666;padding:2px 8px;border-radius:10px;font-size:.75rem;margin-top:8px}

/* === 功能模块卡片 === */
.feature-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.feature-card{background:#fff;border-radius:12px;padding:30px 24px;text-align:center;box-shadow:0 4px 15px rgba(0,0,0,.06);transition:transform .3s}
.feature-card:hover{transform:translateY(-5px)}
.feature-icon{width:64px;height:64px;margin:0 auto 16px;background:linear-gradient(135deg,#ff6b4a,#ff8e53);border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:1.8rem;color:#fff}
.feature-card h3{font-size:1.1rem;margin-bottom:8px;color:#1a1a2e}
.feature-card p{color:#666;font-size:.9rem;line-height:1.6}

/* === 专家展示 === */
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.expert-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 4px 15px rgba(0,0,0,.08);text-align:center;padding:30px 20px;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 16px;border:3px solid #ff6b4a}
.expert-card h3{font-size:1.05rem;margin-bottom:4px}
.expert-card .title{color:#ff6b4a;font-size:.85rem;margin-bottom:10px}
.expert-card p{color:#666;font-size:.85rem;line-height:1.6;margin-bottom:16px}
.expert-card .expert-btns{display:flex;gap:10px;justify-content:center}
.expert-card .expert-btns a{padding:6px 16px;border-radius:20px;font-size:.8rem;border:1px solid #ff6b4a;color:#ff6b4a;transition:all .3s}
.expert-card .expert-btns a:hover{background:#ff6b4a;color:#fff}

/* === 合作品牌 === */
.partner-wall{display:flex;flex-wrap:wrap;gap:20px;justify-content:center;align-items:center}
.partner-wall .partner-item{background:#fff;padding:16px 28px;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,.06);font-size:1rem;font-weight:600;color:#555;transition:transform .3s}
.partner-wall .partner-item:hover{transform:scale(1.05)}

/* === FAQ === */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#fff;border-radius:10px;margin-bottom:12px;box-shadow:0 2px 8px rgba(0,0,0,.05);overflow:hidden}
.faq-question{padding:18px 24px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;font-size:1rem;color:#1a1a2e;transition:background .3s}
.faq-question:hover{background:#f8f8f8}
.faq-question .arrow{transition:transform .3s;font-size:1.2rem;color:#ff6b4a}
.faq-item.active .faq-question .arrow{transform:rotate(180deg)}
.faq-answer{padding:0 24px;max-height:0;overflow:hidden;transition:max-height .4s ease,padding .4s ease;color:#666;font-size:.9rem;line-height:1.8}
.faq-item.active .faq-answer{max-height:300px;padding:0 24px 18px}

/* === 用户评论 === */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.review-card{background:#fff;border-radius:12px;padding:24px;box-shadow:0 4px 15px rgba(0,0,0,.06)}
.review-header{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.review-avatar{width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,#ff6b4a,#ff8e53);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:1.1rem}
.review-name{font-weight:600;font-size:.95rem}
.review-date{color:#999;font-size:.8rem}
.review-stars{color:#ffc107;margin-bottom:8px;font-size:.9rem}
.review-text{color:#555;font-size:.9rem;line-height:1.7}

/* === 联系我们 === */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:24px}
.contact-card{background:#fff;border-radius:12px;padding:24px;text-align:center;box-shadow:0 4px 15px rgba(0,0,0,.06)}
.contact-card .icon{font-size:2rem;margin-bottom:12px}
.contact-card h3{font-size:1rem;margin-bottom:8px;color:#1a1a2e}
.contact-card p{color:#666;font-size:.9rem}

/* === How-To 指南 === */
.howto-steps{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:24px;max-width:1000px;margin:0 auto}
.howto-step{text-align:center;padding:24px}
.step-num{width:48px;height:48px;background:linear-gradient(135deg,#ff6b4a,#ff8e53);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.2rem;font-weight:700;margin:0 auto 16px}
.howto-step h3{font-size:1rem;margin-bottom:8px;color:#1a1a2e}
.howto-step p{color:#666;font-size:.85rem}

/* === 社交分享 === */
.share-bar{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;padding:20px 0}
.share-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 20px;border-radius:20px;font-size:.85rem;color:#fff;transition:opacity .3s}
.share-btn:hover{opacity:.85;color:#fff}
.share-btn.wechat{background:#07c160}
.share-btn.weibo{background:#e6162d}
.share-btn.douyin{background:#161823}
.share-btn.bilibili{background:#00a1d6}

/* === 页脚 === */
.site-footer{background:#1a1a2e;color:#aaa;padding:40px 0 20px}
.footer-inner{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:30px;max-width:1200px;margin:0 auto;padding:0 20px}
.footer-col h3{color:#fff;font-size:1rem;margin-bottom:16px;position:relative;padding-bottom:8px}
.footer-col h3::after{content:"";position:absolute;bottom:0;left:0;width:30px;height:2px;background:#ff6b4a}
.footer-col p,.footer-col a{color:#aaa;font-size:.85rem;line-height:2}
.footer-col a:hover{color:#ff6b4a}
.footer-col .qrcode-img{width:120px;border-radius:8px;margin-top:8px}
.footer-bottom{text-align:center;padding:20px;border-top:1px solid rgba(255,255,255,.1);margin-top:30px;font-size:.8rem}
.footer-bottom .update-time{color:#ff6b4a}

/* === 面包屑 === */
.breadcrumb{padding:12px 0;font-size:.85rem;color:#999}
.breadcrumb a{color:#ff6b4a}
.breadcrumb span{margin:0 6px}

/* === 内页通用 === */
.page-hero{background:linear-gradient(135deg,#1a1a2e,#16213e);padding:60px 0;text-align:center;color:#fff}
.page-hero h1{font-size:2rem;margin-bottom:10px}
.page-hero p{color:#ccc;font-size:1rem}
.page-content{padding:40px 0}

/* === 响应式 === */
@media(max-width:768px){
  .header-inner{flex-wrap:wrap}
  .main-nav{display:none;width:100%;flex-direction:column;padding-top:10px}
  .main-nav.show{display:flex}
  .mobile-menu-btn{display:block}
  .hero-section{height:320px}
  .hero-overlay h1{font-size:1.6rem}
  .hero-overlay p{font-size:.9rem}
  .section{padding:40px 0}
  .section-title h2{font-size:1.4rem}
  .video-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
  .footer-inner{grid-template-columns:1fr}
  .search-form{max-width:100%}
}
@media(max-width:480px){
  .video-grid{grid-template-columns:1fr}
  .feature-grid{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:1fr}
  .review-grid{grid-template-columns:1fr}
  .hero-section{height:260px}
  .hero-overlay h1{font-size:1.3rem}
}