/**
 * 男同网 - 专属社交视频互动社区
 * 外部CSS样式文件
 * Domain: nwkigdn.cn
 * Version: 2.0
 */

/* ============ Reset & Base ============ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:#333;line-height:1.7;background:#f8faf8}
a{text-decoration:none;color:inherit;transition:color .3s}
a:hover{color:#2d8c3c}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* ============ 干扰标签隐藏 ============ */
.noise-wrap{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;opacity:0;pointer-events:none}

/* ============ Header ============ */
.site-header{background:linear-gradient(135deg,#1a5c28 0%,#2d8c3c 50%,#3aa84e 100%);position:sticky;top:0;z-index:1000;box-shadow:0 2px 20px rgba(0,0,0,.15)}
.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{width:42px;height:42px;border-radius:8px}
.logo-area h1{font-size:22px;color:#fff;font-weight:700;letter-spacing:1px}
.logo-area h1 span{font-size:12px;display:block;font-weight:400;opacity:.85;letter-spacing:0}

/* Navigation */
.main-nav{display:flex;align-items:center;gap:0}
.main-nav a{color:rgba(255,255,255,.9);padding:8px 16px;font-size:15px;border-radius:6px;transition:all .3s}
.main-nav a:hover,.main-nav a.active{background:rgba(255,255,255,.18);color:#fff}

/* Mobile menu */
.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.hamburger span{width:24px;height:2px;background:#fff;border-radius:2px;transition:all .3s}
.mobile-menu{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(26,92,40,.97);z-index:999;flex-direction:column;align-items:center;justify-content:center;gap:20px}
.mobile-menu.open{display:flex}
.mobile-menu a{color:#fff;font-size:20px;padding:12px 40px;border-radius:8px;transition:background .3s}
.mobile-menu a:hover{background:rgba(255,255,255,.15)}
.mobile-close{position:absolute;top:20px;right:20px;color:#fff;font-size:32px;cursor:pointer}

/* Search bar */
.search-bar{background:rgba(255,255,255,.08);border-bottom:1px solid rgba(255,255,255,.1);padding:10px 0}
.search-bar .container{display:flex;align-items:center;gap:12px}
.search-input-wrap{flex:1;position:relative}
.search-input-wrap input{width:100%;padding:10px 44px 10px 16px;border:2px solid rgba(45,140,60,.3);border-radius:25px;font-size:14px;background:#fff;outline:none;transition:border-color .3s}
.search-input-wrap input:focus{border-color:#2d8c3c}
.search-input-wrap button{position:absolute;right:4px;top:50%;transform:translateY(-50%);background:#2d8c3c;color:#fff;border:none;padding:7px 18px;border-radius:20px;cursor:pointer;font-size:14px;transition:background .3s}
.search-input-wrap button:hover{background:#1a5c28}
.search-hot{display:flex;align-items:center;gap:8px;font-size:13px;color:#888}
.search-hot a{color:#2d8c3c;padding:2px 8px;background:rgba(45,140,60,.08);border-radius:12px;font-size:12px}
.search-tip{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;border-radius:0 0 12px 12px;box-shadow:0 8px 24px rgba(0,0,0,.1);padding:12px 16px;z-index:50}
.search-tip.show{display:block}
.search-tip p{font-size:13px;color:#666;padding:6px 0;border-bottom:1px solid #f0f0f0}

/* ============ Hero Banner ============ */
.hero-section{position:relative;min-height:480px;display:flex;align-items:center;overflow:hidden;background:#1a5c28}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.6}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(26,92,40,.85) 0%,rgba(45,140,60,.6) 100%)}
.hero-content{position:relative;z-index:2;max-width:1200px;margin:0 auto;padding:60px 20px;color:#fff}
.hero-content h2{font-size:42px;font-weight:800;margin-bottom:16px;text-shadow:0 2px 8px rgba(0,0,0,.3)}
.hero-content h2 em{font-style:normal;color:#a8e6b5}
.hero-tag{display:inline-block;background:rgba(255,255,255,.2);padding:6px 18px;border-radius:20px;font-size:14px;margin-bottom:20px;backdrop-filter:blur(4px)}
.hero-desc{font-size:17px;max-width:640px;line-height:1.8;opacity:.95;margin-bottom:28px}
.hero-stats{display:flex;gap:40px;margin-top:20px}
.hero-stat{text-align:center}
.hero-stat .num{font-size:32px;font-weight:800;color:#a8e6b5}
.hero-stat .label{font-size:13px;opacity:.8;margin-top:4px}
.hero-btns{display:flex;gap:16px;margin-top:28px;flex-wrap:wrap}
.btn-primary{background:linear-gradient(135deg,#3aa84e,#2d8c3c);color:#fff;padding:12px 32px;border-radius:25px;font-size:16px;font-weight:600;border:none;cursor:pointer;transition:all .3s;display:inline-block;box-shadow:0 4px 15px rgba(45,140,60,.4)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(45,140,60,.5)}
.btn-outline{border:2px solid rgba(255,255,255,.6);color:#fff;padding:10px 30px;border-radius:25px;font-size:16px;cursor:pointer;background:transparent;transition:all .3s;display:inline-block}
.btn-outline:hover{background:rgba(255,255,255,.15);border-color:#fff}

/* ============ Section Common ============ */
.section{padding:60px 0}
.section-alt{background:#fff}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:30px;font-weight:700;color:#1a5c28;margin-bottom:10px}
.section-title h3{font-size:22px;font-weight:600;color:#2d8c3c;margin-bottom:8px}
.section-title p{font-size:15px;color:#777;max-width:600px;margin:0 auto}
.section-title .tag{display:inline-block;background:linear-gradient(135deg,#e8f5e9,#c8e6c9);color:#2d8c3c;padding:4px 14px;border-radius:15px;font-size:13px;margin-bottom:12px}

/* ============ Video Cards ============ */
.video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.video-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 2px 12px rgba(0,0,0,.06);transition:all .3s;cursor:pointer}
.video-card:hover{transform:translateY(-4px);box-shadow:0 8px 30px rgba(0,0,0,.12)}
.video-thumb{position:relative;padding-top:56.25%;overflow:hidden;background:#e8f5e9}
.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:56px;height:56px;background:rgba(45,140,60,.85);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:all .3s}
.video-card:hover .play-btn{opacity:1}
.play-btn::after{content:'';width:0;height:0;border-left:20px solid #fff;border-top:12px solid transparent;border-bottom:12px solid transparent;margin-left:4px}
.video-duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.75);color:#fff;padding:2px 8px;border-radius:4px;font-size:12px}
.video-info{padding:14px 16px}
.video-info h4{font-size:15px;font-weight:600;color:#222;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:12px;color:#999}
.video-meta span{display:flex;align-items:center;gap:3px}
.video-tags{display:flex;gap:6px;margin-top:8px;flex-wrap:wrap}
.video-tags span{background:#e8f5e9;color:#2d8c3c;padding:2px 8px;border-radius:10px;font-size:11px}

/* ============ AI Feature ============ */
.ai-section{background:linear-gradient(135deg,#0a2e14 0%,#1a5c28 100%);color:#fff;padding:70px 0}
.ai-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.ai-features{display:flex;flex-direction:column;gap:20px}
.ai-feature-item{display:flex;gap:16px;align-items:flex-start;background:rgba(255,255,255,.08);padding:20px;border-radius:12px;backdrop-filter:blur(4px)}
.ai-icon{width:48px;height:48px;background:linear-gradient(135deg,#3aa84e,#2d8c3c);border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:22px;flex-shrink:0}
.ai-feature-item h4{font-size:16px;font-weight:600;margin-bottom:4px}
.ai-feature-item p{font-size:13px;opacity:.8;line-height:1.6}
.ai-img{border-radius:16px;overflow:hidden;box-shadow:0 8px 30px rgba(0,0,0,.3)}

/* ============ Community ============ */
.community-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.community-card{background:#fff;border-radius:12px;padding:24px;text-align:center;box-shadow:0 2px 12px rgba(0,0,0,.06);transition:all .3s}
.community-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(0,0,0,.1)}
.community-icon{width:56px;height:56px;background:linear-gradient(135deg,#e8f5e9,#c8e6c9);border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:26px;margin:0 auto 14px}
.community-card h4{font-size:16px;font-weight:600;color:#1a5c28;margin-bottom:6px}
.community-card p{font-size:13px;color:#777;line-height:1.6}
.community-card .count{font-size:20px;font-weight:700;color:#2d8c3c;margin-top:8px}

/* ============ Expert ============ */
.expert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.expert-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 2px 12px rgba(0,0,0,.06);transition:all .3s;text-align:center}
.expert-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(0,0,0,.1)}
.expert-avatar{width:100px;height:100px;border-radius:50%;margin:24px auto 12px;overflow:hidden;border:3px solid #e8f5e9}
.expert-avatar img{width:100%;height:100%;object-fit:cover}
.expert-card h4{font-size:16px;font-weight:600;color:#222;margin-bottom:4px}
.expert-card .role{font-size:13px;color:#2d8c3c;margin-bottom:8px}
.expert-card .bio{font-size:12px;color:#888;padding:0 16px;line-height:1.6}
.expert-card .awards{font-size:11px;color:#d4a017;margin-top:8px;padding:0 16px}
.expert-btns{display:flex;gap:8px;justify-content:center;padding:16px}
.expert-btns a{padding:6px 14px;border-radius:15px;font-size:12px;border:1px solid #2d8c3c;color:#2d8c3c;transition:all .3s}
.expert-btns a:hover{background:#2d8c3c;color:#fff}

/* ============ Partners ============ */
.partner-wall{display:flex;flex-wrap:wrap;justify-content:center;gap:30px;padding:20px 0}
.partner-item{width:120px;height:60px;background:#fff;border-radius:10px;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 8px rgba(0,0,0,.06);padding:10px;transition:all .3s;font-size:14px;font-weight:600;color:#555}
.partner-item:hover{box-shadow:0 4px 16px rgba(0,0,0,.1);transform:scale(1.05)}

/* ============ How-To Guide ============ */
.howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:30px}
.howto-step{text-align:center;position:relative}
.step-num{width:48px;height:48px;background:linear-gradient(135deg,#3aa84e,#2d8c3c);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:700;margin:0 auto 14px}
.howto-step h4{font-size:15px;font-weight:600;color:#222;margin-bottom:6px}
.howto-step p{font-size:13px;color:#777;line-height:1.6}

/* ============ 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,.04);overflow:hidden}
.faq-question{padding:18px 24px;font-size:15px;font-weight:600;color:#222;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:background .3s}
.faq-question:hover{background:#f8faf8}
.faq-question::after{content:'+';font-size:22px;color:#2d8c3c;transition:transform .3s}
.faq-item.open .faq-question::after{transform:rotate(45deg)}
.faq-answer{padding:0 24px;max-height:0;overflow:hidden;transition:all .4s ease;font-size:14px;color:#666;line-height:1.8}
.faq-item.open .faq-answer{padding:0 24px 18px;max-height:500px}

/* ============ Reviews ============ */
.review-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.review-card{background:#fff;border-radius:12px;padding:24px;box-shadow:0 2px 12px rgba(0,0,0,.06)}
.review-header{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.review-avatar{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,#3aa84e,#2d8c3c);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:18px}
.review-name{font-size:15px;font-weight:600;color:#222}
.review-date{font-size:12px;color:#999}
.review-stars{color:#f5a623;font-size:14px;margin-bottom:8px}
.review-text{font-size:14px;color:#555;line-height:1.7}

/* ============ Contact ============ */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.contact-info{display:flex;flex-direction:column;gap:16px}
.contact-item{display:flex;gap:12px;align-items:flex-start}
.contact-icon{width:40px;height:40px;background:#e8f5e9;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0}
.contact-item h4{font-size:14px;font-weight:600;color:#222;margin-bottom:2px}
.contact-item p{font-size:13px;color:#777}
.qrcode-area{display:flex;gap:30px;justify-content:center;align-items:center}
.qrcode-box{text-align:center}
.qrcode-box img{width:140px;height:140px;border-radius:10px;border:2px solid #e8f5e9}
.qrcode-box p{font-size:13px;color:#666;margin-top:8px}

/* ============ Social Share ============ */
.share-bar{display:flex;gap:12px;justify-content:center;padding:20px 0}
.share-btn{width:44px;height:44px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:18px;color:#fff;transition:all .3s;cursor:pointer}
.share-btn:hover{transform:scale(1.1)}
.share-wechat{background:#07c160}
.share-weibo{background:#e6162d}
.share-douyin{background:#161823}
.share-bilibili{background:#00a1d6}

/* ============ Footer ============ */
.site-footer{background:linear-gradient(135deg,#0a2e14,#1a5c28);color:rgba(255,255,255,.8);padding:50px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px;padding-bottom:30px;border-bottom:1px solid rgba(255,255,255,.1)}
.footer-brand h3{font-size:20px;color:#fff;margin-bottom:10px}
.footer-brand p{font-size:13px;line-height:1.7;opacity:.8}
.footer-col h4{font-size:15px;color:#fff;margin-bottom:14px;font-weight:600}
.footer-col a{display:block;font-size:13px;padding:4px 0;opacity:.7;transition:opacity .3s}
.footer-col a:hover{opacity:1;color:#a8e6b5}
.footer-bottom{text-align:center;padding:20px 0;font-size:13px;opacity:.6}
.footer-bottom a{color:#a8e6b5}

/* ============ Back to Top ============ */
.back-top{position:fixed;bottom:30px;right:30px;width:44px;height:44px;background:#2d8c3c;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:20px;cursor:pointer;opacity:0;visibility:hidden;transition:all .3s;z-index:100;box-shadow:0 4px 12px rgba(45,140,60,.3)}
.back-top.show{opacity:1;visibility:visible}
.back-top:hover{background:#1a5c28;transform:translateY(-3px)}

/* ============ Breadcrumb ============ */
.breadcrumb{padding:14px 0;font-size:13px;color:#999;background:#fff;border-bottom:1px solid #f0f0f0}
.breadcrumb a{color:#2d8c3c}
.breadcrumb span{margin:0 6px}

/* ============ Inner Page ============ */
.page-hero{background:linear-gradient(135deg,#1a5c28,#2d8c3c);color:#fff;padding:50px 0;text-align:center}
.page-hero h1{font-size:32px;font-weight:700;margin-bottom:10px}
.page-hero p{font-size:15px;opacity:.85;max-width:600px;margin:0 auto}
.page-content{padding:40px 0}
.content-block{background:#fff;border-radius:12px;padding:30px;margin-bottom:24px;box-shadow:0 2px 12px rgba(0,0,0,.06)}
.content-block h2{font-size:22px;font-weight:700;color:#1a5c28;margin-bottom:16px}
.content-block h3{font-size:18px;font-weight:600;color:#2d8c3c;margin-bottom:12px}
.content-block p{font-size:14px;color:#555;line-height:1.8;margin-bottom:12px}

/* ============ Responsive ============ */
@media(max-width:1024px){
  .video-grid{grid-template-columns:repeat(2,1fr)}
  .expert-grid{grid-template-columns:repeat(2,1fr)}
  .community-grid{grid-template-columns:repeat(2,1fr)}
  .howto-steps{grid-template-columns:repeat(2,1fr)}
  .ai-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .main-nav{display:none}
  .hamburger{display:flex}
  .hero-content h2{font-size:28px}
  .hero-stats{gap:20px}
  .hero-stat .num{font-size:24px}
  .video-grid{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:1fr}
  .community-grid{grid-template-columns:1fr}
  .howto-steps{grid-template-columns:1fr}
  .review-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .search-hot{display:none}
  .section{padding:40px 0}
  .section-title h2{font-size:24px}
}
@media(max-width:480px){
  .hero-content h2{font-size:22px}
  .hero-desc{font-size:14px}
  .hero-btns{flex-direction:column;gap:10px}
  .qrcode-area{flex-direction:column}
}

/* ============ Animations ============ */
.animate-in{opacity:0;transform:translateY(30px);transition:all .6s ease}
.animate-in.visible{opacity:1;transform:translateY(0)}

/* ============ Lazy Image ============ */
.lazy-img{opacity:0;transition:opacity .5s}
.lazy-img.loaded{opacity:1}