/* ============================================
   抖阴 - 动物写真与视频社区 原创样式表
   域名: 3mp3.cn
   配色方案: 珊瑚橙 #E8604C + 深炭灰 #2D2D2D + 暖米白 #FFF8F2
   ============================================ */

/* === 基础重置 === */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","WenQuanYi Micro Hei",sans-serif;color:#2D2D2D;background:#FFF8F2;line-height:1.7;overflow-x:hidden}
a{color:#E8604C;text-decoration:none;transition:color .3s}
a:hover{color:#c94535}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.3;color:#2D2D2D}

/* === 容器 === */
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.section-wrap{padding:60px 0}
.section-wrap:nth-child(even){background:#fff}

/* === 顶部导航 === */
.site-header{background:#2D2D2D;position:sticky;top:0;z-index:1000;box-shadow:0 2px 12px rgba(0,0,0,.15)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:0 20px;max-width:1200px;margin:0 auto;height:64px}
.site-logo{display:flex;align-items:center;gap:10px}
.site-logo img{height:40px;width:auto}
.site-logo span{color:#fff;font-size:1.25rem;font-weight:700;letter-spacing:1px}
.main-nav{display:flex;align-items:center;gap:0}
.main-nav a{color:#e0e0e0;padding:8px 16px;font-size:.9rem;transition:all .3s;border-radius:4px}
.main-nav a:hover,.main-nav a.active{color:#fff;background:rgba(232,96,76,.85)}

/* === 搜索框 === */
.search-bar{background:#3a3a3a;padding:10px 0}
.search-bar .container{display:flex;justify-content:center}
.search-box{display:flex;max-width:560px;width:100%;border-radius:24px;overflow:hidden;box-shadow:0 2px 8px rgba(0,0,0,.1)}
.search-box input{flex:1;border:none;padding:10px 20px;font-size:.95rem;outline:none;background:#fff;color:#333}
.search-box button{background:#E8604C;color:#fff;border:none;padding:10px 24px;font-size:.95rem;cursor:pointer;transition:background .3s;white-space:nowrap}
.search-box button:hover{background:#c94535}

/* === 手机菜单 === */
.menu-toggle{display:none;background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer;padding:8px}

/* === Banner区域 === */
.hero-banner{position:relative;height:520px;overflow:hidden;background:#2D2D2D}
.hero-banner img{width:100%;height:100%;object-fit:cover;opacity:.85}
.hero-overlay{position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(135deg,rgba(45,45,45,.7) 0%,rgba(232,96,76,.4) 100%);display:flex;align-items:center;justify-content:center}
.hero-content{text-align:center;color:#fff;max-width:700px;padding:0 20px}
.hero-content h1{font-size:2.6rem;margin-bottom:16px;text-shadow:0 2px 8px rgba(0,0,0,.3)}
.hero-content p{font-size:1.15rem;margin-bottom:24px;opacity:.95;line-height:1.8}
.hero-content .btn-primary{display:inline-block;background:#E8604C;color:#fff;padding:14px 36px;border-radius:30px;font-size:1.05rem;font-weight:600;transition:all .3s;box-shadow:0 4px 15px rgba(232,96,76,.4)}
.hero-content .btn-primary:hover{background:#c94535;transform:translateY(-2px);box-shadow:0 6px 20px rgba(232,96,76,.5)}

/* === 面包屑 === */
.breadcrumb{padding:12px 0;font-size:.85rem;color:#888}
.breadcrumb a{color:#E8604C}
.breadcrumb span{margin:0 6px;color:#ccc}

/* === 区域标题 === */
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:2rem;color:#2D2D2D;position:relative;display:inline-block;padding-bottom:12px}
.section-title h2::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:60px;height:3px;background:linear-gradient(90deg,#E8604C,#f4a261);border-radius:2px}
.section-title p{color:#777;margin-top:10px;font-size:1rem}

/* === 视频卡片网格 === */
.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.video-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 4px 16px rgba(0,0,0,.06);transition:all .35s;cursor:pointer}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 32px rgba(0,0,0,.12)}
.video-thumb{position:relative;padding-top:56.25%;overflow:hidden;background:#eee}
.video-thumb img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;transition:transform .4s}
.video-card:hover .video-thumb img{transform:scale(1.06)}
.video-play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:56px;height:56px;background:rgba(232,96,76,.9);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s;box-shadow:0 4px 12px rgba(0,0,0,.2)}
.video-play-btn::after{content:'';width:0;height:0;border-style:solid;border-width:10px 0 10px 18px;border-color:transparent transparent transparent #fff;margin-left:3px}
.video-card:hover .video-play-btn{opacity:1}
.video-duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.75);color:#fff;padding:2px 8px;border-radius:4px;font-size:.75rem}
.video-info{padding:14px 16px}
.video-info h3{font-size:.95rem;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;align-items:center;gap:12px;font-size:.8rem;color:#999}
.video-meta span{display:flex;align-items:center;gap:3px}

/* === 专家卡片 === */
.expert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.expert-card{background:#fff;border-radius:12px;overflow:hidden;text-align:center;padding:30px 20px;box-shadow:0 4px 16px rgba(0,0,0,.06);transition:all .35s}
.expert-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(0,0,0,.1)}
.expert-card img{width:100px;height:100px;border-radius:50%;object-fit:cover;margin:0 auto 16px;border:3px solid #E8604C}
.expert-card h4{font-size:1.05rem;margin-bottom:4px}
.expert-card .role{color:#E8604C;font-size:.85rem;margin-bottom:10px}
.expert-card p{font-size:.85rem;color:#777;line-height:1.6}
.expert-card .btn-sm{display:inline-block;margin-top:12px;padding:6px 18px;background:#E8604C;color:#fff;border-radius:20px;font-size:.8rem;transition:background .3s}
.expert-card .btn-sm:hover{background:#c94535}

/* === FAQ区域 === */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#fff;border-radius:10px;margin-bottom:12px;overflow:hidden;box-shadow:0 2px 8px rgba(0,0,0,.04)}
.faq-question{padding:18px 24px;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:background .3s;font-size:.95rem}
.faq-question:hover{background:#fef5f2}
.faq-question::after{content:'+';font-size:1.3rem;color:#E8604C;transition:transform .3s;font-weight:400}
.faq-item.active .faq-question::after{transform:rotate(45deg)}
.faq-answer{padding:0 24px;max-height:0;overflow:hidden;transition:all .4s ease;font-size:.9rem;color:#666;line-height:1.8}
.faq-item.active .faq-answer{padding:0 24px 18px;max-height:500px}

/* === 用户评论 === */
.review-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.review-card{background:#fff;border-radius:12px;padding:24px;box-shadow:0 4px 16px 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:#E8604C;color:#fff;display:flex;align-items:center;justify-content:center;font-size:1.1rem;font-weight:700}
.review-name{font-weight:600;font-size:.95rem}
.review-date{font-size:.8rem;color:#999}
.review-stars{color:#f4a261;margin-bottom:8px;font-size:.9rem}
.review-text{font-size:.9rem;color:#555;line-height:1.8}

/* === 社区模块 === */
.community-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.community-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 4px 16px rgba(0,0,0,.06);transition:all .35s}
.community-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(0,0,0,.1)}
.community-card img{width:100%;height:200px;object-fit:cover}
.community-card .card-body{padding:18px}
.community-card h4{margin-bottom:8px;font-size:1rem}
.community-card p{font-size:.85rem;color:#777;line-height:1.6}
.community-card .tag{display:inline-block;background:#fef5f2;color:#E8604C;padding:3px 10px;border-radius:12px;font-size:.75rem;margin-top:8px}

/* === AI赋能模块 === */
.ai-features{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.ai-card{background:linear-gradient(135deg,#2D2D2D 0%,#3a3a3a 100%);border-radius:12px;padding:30px;color:#fff;transition:all .35s}
.ai-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(232,96,76,.2)}
.ai-card .icon{width:56px;height:56px;background:rgba(232,96,76,.2);border-radius:12px;display:flex;align-items:center;justify-content:center;margin-bottom:16px;font-size:1.5rem}
.ai-card h4{font-size:1.05rem;margin-bottom:8px}
.ai-card p{font-size:.85rem;color:#bbb;line-height:1.7}

/* === 联系我们 === */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.contact-info{background:#fff;border-radius:12px;padding:30px;box-shadow:0 4px 16px rgba(0,0,0,.06)}
.contact-info h3{margin-bottom:20px;font-size:1.2rem}
.contact-item{display:flex;align-items:flex-start;gap:12px;margin-bottom:16px;font-size:.9rem;color:#555}
.contact-item .label{font-weight:600;color:#2D2D2D;min-width:80px}
.qrcode-wrap{display:flex;gap:30px;margin-top:20px}
.qrcode-item{text-align:center}
.qrcode-item img{width:140px;height:140px;border-radius:8px;border:1px solid #eee}
.qrcode-item p{margin-top:8px;font-size:.8rem;color:#888}

/* === 分享按钮 === */
.share-bar{display:flex;align-items:center;gap:12px;padding:16px 0}
.share-bar span{font-size:.9rem;color:#888}
.share-btn{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:50%;color:#fff;font-size:.85rem;transition:all .3s;cursor:pointer}
.share-btn.wechat{background:#07c160}
.share-btn.weibo{background:#e6162d}
.share-btn.douyin{background:#161823}
.share-btn.bilibili{background:#00a1d6}
.share-btn:hover{transform:scale(1.15);opacity:.9}

/* === 页脚 === */
.site-footer{background:#2D2D2D;color:#ccc;padding:50px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px;margin-bottom:40px}
.footer-col h4{color:#fff;font-size:1rem;margin-bottom:16px;position:relative;padding-bottom:10px}
.footer-col h4::after{content:'';position:absolute;bottom:0;left:0;width:30px;height:2px;background:#E8604C}
.footer-col p{font-size:.85rem;line-height:1.8;color:#aaa}
.footer-col a{display:block;color:#aaa;font-size:.85rem;padding:4px 0;transition:color .3s}
.footer-col a:hover{color:#E8604C}
.footer-logo{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-logo img{height:36px}
.footer-logo span{color:#fff;font-size:1.1rem;font-weight:700}
.footer-bottom{border-top:1px solid #444;padding:20px 0;text-align:center;font-size:.8rem;color:#888}
.footer-bottom a{color:#E8604C}

/* === 内页通用 === */
.page-hero{background:#2D2D2D;padding:60px 0;text-align:center;color:#fff}
.page-hero h1{font-size:2.2rem;color:#fff;margin-bottom:10px}
.page-hero p{color:#ccc;font-size:1rem}
.page-content{padding:50px 0}
.page-content article{max-width:900px;margin:0 auto}
.page-content article p{margin-bottom:16px;font-size:.95rem;line-height:1.9;color:#555}
.page-content article h2{font-size:1.5rem;margin:30px 0 16px;color:#2D2D2D}
.page-content article h3{font-size:1.2rem;margin:24px 0 12px;color:#2D2D2D}

/* === 标签云 === */
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0}
.tag-cloud a{display:inline-block;background:#fef5f2;color:#E8604C;padding:5px 14px;border-radius:16px;font-size:.8rem;transition:all .3s}
.tag-cloud a:hover{background:#E8604C;color:#fff}

/* === 合作品牌墙 === */
.brand-wall{display:flex;flex-wrap:wrap;justify-content:center;gap:30px;align-items:center;padding:20px 0}
.brand-wall .brand-item{width:120px;height:60px;background:#f5f5f5;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:.85rem;color:#999;transition:all .3s}
.brand-wall .brand-item:hover{background:#fef5f2;color:#E8604C}

/* === How-To指南 === */
.howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step}
.howto-step{background:#fff;border-radius:12px;padding:24px;text-align:center;box-shadow:0 4px 16px rgba(0,0,0,.06);position:relative}
.howto-step::before{counter-increment:step;content:counter(step);width:40px;height:40px;background:#E8604C;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 12px;font-weight:700;font-size:1.1rem}
.howto-step h4{margin-bottom:8px;font-size:.95rem}
.howto-step p{font-size:.85rem;color:#777}

/* === 懒加载 === */
.lazy{opacity:0;transition:opacity .5s}
.lazy.loaded{opacity:1}

/* === 响应式 === */
@media(max-width:1024px){
  .video-grid{grid-template-columns:repeat(3,1fr)}
  .expert-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
  .howto-steps{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .menu-toggle{display:block}
  .main-nav{display:none;position:absolute;top:64px;left:0;right:0;background:#2D2D2D;flex-direction:column;padding:16px;gap:4px;box-shadow:0 4px 12px rgba(0,0,0,.2)}
  .main-nav.open{display:flex}
  .main-nav a{padding:10px 16px;width:100%}
  .hero-banner{height:380px}
  .hero-content h1{font-size:1.8rem}
  .hero-content p{font-size:.95rem}
  .video-grid{grid-template-columns:repeat(2,1fr);gap:16px}
  .community-grid{grid-template-columns:1fr}
  .ai-features{grid-template-columns:1fr}
  .review-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .section-wrap{padding:40px 0}
  .howto-steps{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:1fr}
}
@media(max-width:480px){
  .video-grid{grid-template-columns:1fr}
  .header-inner{padding:0 12px}
  .hero-banner{height:300px}
  .hero-content h1{font-size:1.5rem}
  .search-box{border-radius:20px}
}