/* ===== 人兽 全站样式 ===== */
:root {
  --primary: #E63946;
  --primary-light: #FF6B6B;
  --primary-dark: #B5202E;
  --accent: #F77F00;
  --bg: #FFFFFF;
  --bg-section: #F8F9FA;
  --bg-dark: #1A1A2E;
  --text: #212529;
  --text-muted: #6C757D;
  --text-light: #F8F9FA;
  --border: #DEE2E6;
  --shadow: 0 2px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
  --radius: 12px;
  --transition: 0.25s cubic-bezier(0.23,1,0.32,1);
  --font: 'PingFang SC','Hiragino Sans GB','Microsoft YaHei','Noto Sans SC',sans-serif;
  --container: 1200px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;font-size:16px;}
body{font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased;}
img{max-width:100%;height:auto;display:block;}
a{color:var(--primary);text-decoration:none;transition:color var(--transition);}
a:hover{color:var(--primary-dark);}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 1rem;}
@media(min-width:768px){.container{padding:0 1.5rem;}}
@media(min-width:1024px){.container{padding:0 2rem;}}

/* ===== Header ===== */
.site-header{position:sticky;top:0;z-index:1000;background:var(--bg);border-bottom:1px solid var(--border);box-shadow:var(--shadow);}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px;}
.logo-link{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.25rem;color:var(--primary);}
.logo-img{border-radius:8px;}
.logo-text{white-space:nowrap;}
.main-nav .nav-list{display:flex;gap:4px;list-style:none;}
.main-nav .nav-list li a{display:block;padding:8px 14px;border-radius:8px;font-size:0.92rem;font-weight:500;color:var(--text);transition:background var(--transition),color var(--transition);}
.main-nav .nav-list li a:hover{background:var(--primary);color:#fff;}
.hamburger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px;}
.hamburger span{width:24px;height:2.5px;background:var(--text);border-radius:2px;transition:var(--transition);}
@media(max-width:900px){
  .main-nav .nav-list{display:none;position:absolute;top:64px;left:0;right:0;background:var(--bg);flex-direction:column;padding:1rem;box-shadow:var(--shadow-lg);border-radius:0 0 var(--radius) var(--radius);}
  .main-nav .nav-list.active{display:flex;}
  .hamburger{display:flex;}
}

/* Search Bar */
.search-bar{background:var(--bg-section);padding:10px 0;border-bottom:1px solid var(--border);}
.search-form{display:flex;max-width:560px;margin:0 auto;gap:0;}
.search-input{flex:1;padding:10px 16px;border:2px solid var(--border);border-radius:var(--radius) 0 0 var(--radius);font-size:0.95rem;outline:none;transition:border-color var(--transition);}
.search-input:focus{border-color:var(--primary);}
.search-btn{padding:10px 18px;background:var(--primary);color:#fff;border:none;border-radius:0 var(--radius) var(--radius) 0;cursor:pointer;transition:background var(--transition);}
.search-btn:hover{background:var(--primary-dark);}

/* ===== Sections ===== */
.section{padding:60px 0;}
.section-header{text-align:center;margin-bottom:40px;}
.section-title{font-size:1.8rem;font-weight:800;color:var(--text);margin-bottom:8px;}
.section-subtitle{font-size:1rem;color:var(--text-muted);max-width:640px;margin:0 auto;}
@media(max-width:768px){.section{padding:40px 0;}.section-title{font-size:1.4rem;}}

/* ===== Hero ===== */
.hero{position:relative;background:linear-gradient(135deg,var(--bg-dark) 0%,#16213E 100%);color:var(--text-light);padding:80px 0 60px;overflow:hidden;}
.hero::before{content:'';position:absolute;top:-50%;right:-30%;width:80%;height:200%;background:radial-gradient(circle,rgba(230,57,70,0.15) 0%,transparent 70%);pointer-events:none;}
.hero-content{position:relative;z-index:2;max-width:720px;}
.hero h1{font-size:2.6rem;font-weight:900;line-height:1.3;margin-bottom:16px;}
.hero h1 span{color:var(--primary-light);}
.hero-desc{font-size:1.1rem;opacity:0.9;margin-bottom:28px;line-height:1.8;}
.hero-btns{display:flex;gap:12px;flex-wrap:wrap;}
.btn{display:inline-flex;align-items:center;gap:6px;padding:12px 24px;border-radius:var(--radius);font-size:0.95rem;font-weight:600;border:none;cursor:pointer;transition:transform var(--transition),box-shadow var(--transition),background var(--transition);}
.btn:active{transform:scale(0.97);}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 4px 16px rgba(230,57,70,0.3);}
.btn-primary:hover{background:var(--primary-dark);box-shadow:0 6px 20px rgba(230,57,70,0.4);}
.btn-outline{background:transparent;color:#fff;border:2px solid rgba(255,255,255,0.5);}
.btn-outline:hover{background:rgba(255,255,255,0.1);border-color:#fff;color:#fff;}
@media(max-width:768px){.hero{padding:50px 0 40px;}.hero h1{font-size:1.8rem;}}

/* ===== Video Grid ===== */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px;}
.video-card{position:relative;border-radius:var(--radius);overflow:hidden;background:var(--bg);box-shadow:var(--shadow);transition:transform var(--transition),box-shadow var(--transition);}
.video-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);}
.video-thumb{position:relative;padding-top:56.25%;background:#1a1a2e;overflow:hidden;}
.video-thumb img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;transition:transform 0.4s ease;}
.video-card:hover .video-thumb img{transform:scale(1.05);}
.video-play{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%) scale(0.8);width:56px;height:56px;background:rgba(230,57,70,0.9);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity var(--transition),transform var(--transition);}
.video-play::after{content:'';width:0;height:0;border-style:solid;border-width:10px 0 10px 18px;border-color:transparent transparent transparent #fff;margin-left:4px;}
.video-card:hover .video-play{opacity:1;transform:translate(-50%,-50%) scale(1);}
.video-info{padding:14px 16px;}
.video-title{font-size:0.95rem;font-weight:600;color:var(--text);margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.video-meta{display:flex;gap:12px;font-size:0.8rem;color:var(--text-muted);}
.video-tag{display:inline-block;padding:2px 8px;background:rgba(230,57,70,0.08);color:var(--primary);border-radius:4px;font-size:0.75rem;margin-top:6px;}

/* ===== Expert Cards ===== */
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px;}
.expert-card{background:var(--bg);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);transition:transform var(--transition);}
.expert-card:hover{transform:translateY(-3px);}
.expert-avatar{width:72px;height:72px;border-radius:50%;object-fit:cover;margin-bottom:12px;border:3px solid var(--primary-light);}
.expert-name{font-size:1.1rem;font-weight:700;margin-bottom:4px;}
.expert-role{font-size:0.85rem;color:var(--text-muted);margin-bottom:10px;}
.expert-desc{font-size:0.9rem;line-height:1.6;color:var(--text);margin-bottom:14px;}
.expert-btns{display:flex;gap:8px;}

/* ===== FAQ ===== */
.faq-list{max-width:800px;margin:0 auto;}
.faq-item{border:1px solid var(--border);border-radius:var(--radius);margin-bottom:12px;overflow:hidden;}
.faq-question{width:100%;display:flex;align-items:center;justify-content:space-between;padding:16px 20px;background:var(--bg);border:none;font-size:0.95rem;font-weight:600;color:var(--text);cursor:pointer;text-align:left;transition:background var(--transition);}
.faq-question:hover{background:var(--bg-section);}
.faq-question .icon{font-size:1.2rem;transition:transform var(--transition);}
.faq-item.active .faq-question .icon{transform:rotate(45deg);}
.faq-answer{max-height:0;overflow:hidden;transition:max-height 0.35s ease,padding 0.35s ease;}
.faq-item.active .faq-answer{max-height:400px;padding:0 20px 16px;}
.faq-answer p{font-size:0.9rem;color:var(--text-muted);line-height:1.7;}

/* ===== Reviews ===== */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:20px;}
.review-card{background:var(--bg);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);}
.review-header{display:flex;align-items:center;gap:12px;margin-bottom:12px;}
.review-avatar{width:44px;height:44px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:1rem;}
.review-user-info .name{font-weight:600;font-size:0.92rem;}
.review-user-info .date{font-size:0.78rem;color:var(--text-muted);}
.review-stars{color:#F59E0B;margin-bottom:8px;}
.review-text{font-size:0.9rem;line-height:1.7;color:var(--text);}
.review-tags{display:flex;gap:6px;margin-top:10px;flex-wrap:wrap;}
.tag{padding:3px 10px;border-radius:20px;font-size:0.75rem;font-weight:500;}
.tag-red{background:rgba(230,57,70,0.1);color:var(--primary);}

/* ===== Partners ===== */
.partner-wall{display:flex;flex-wrap:wrap;gap:20px;justify-content:center;align-items:center;}
.partner-wall img{height:48px;opacity:0.7;transition:opacity var(--transition);filter:grayscale(40%);}
.partner-wall img:hover{opacity:1;filter:none;}

/* ===== Contact ===== */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px;}
.contact-card{background:var(--bg);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);text-align:center;}
.contact-card h3{font-size:1rem;font-weight:700;margin-bottom:10px;}
.contact-card p{font-size:0.88rem;color:var(--text-muted);line-height:1.6;}

/* ===== Footer ===== */
.site-footer{background:var(--bg-dark);color:var(--text-light);padding:48px 0 24px;}
.footer-inner{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:32px;}
.footer-brand{display:flex;flex-direction:column;gap:8px;}
.footer-logo{border-radius:8px;}
.footer-name{font-size:1.2rem;font-weight:800;color:var(--primary-light);}
.footer-desc{font-size:0.85rem;opacity:0.8;line-height:1.6;}
.footer-contact h3{font-size:1rem;font-weight:700;margin-bottom:10px;}
.footer-contact ul{list-style:none;font-size:0.85rem;line-height:2;}
.footer-qr{display:flex;gap:16px;}
.qr-item{text-align:center;font-size:0.8rem;}
.qr-item img{border-radius:8px;margin-bottom:6px;}
.footer-nav{display:flex;gap:16px;flex-wrap:wrap;align-items:flex-start;}
.footer-nav a{color:rgba(255,255,255,0.7);font-size:0.85rem;}
.footer-nav a:hover{color:#fff;}
.footer-copy{grid-column:1/-1;text-align:center;padding-top:24px;border-top:1px solid rgba(255,255,255,0.1);font-size:0.8rem;opacity:0.7;}

/* ===== Back to Top ===== */
.back-to-top{position:fixed;bottom:24px;right:24px;width:44px;height:44px;border-radius:50%;background:var(--primary);color:#fff;border:none;font-size:1.2rem;cursor:pointer;opacity:0;visibility:hidden;transition:opacity var(--transition),visibility var(--transition),transform var(--transition);box-shadow:var(--shadow);}
.back-to-top.visible{opacity:1;visibility:visible;}
.back-to-top:hover{transform:translateY(-3px);}

/* ===== Share Buttons ===== */
.share-bar{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin-top:20px;}
.share-btn{padding:8px 16px;border-radius:20px;font-size:0.82rem;font-weight:500;border:1px solid var(--border);background:var(--bg);color:var(--text);cursor:pointer;transition:background var(--transition),color var(--transition);}
.share-btn:hover{background:var(--primary);color:#fff;border-color:var(--primary);}

/* ===== Utility ===== */
.text-center{text-align:center;}
.mt-2{margin-top:1rem;}
.mt-4{margin-top:2rem;}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
@media(max-width:600px){.grid-2{grid-template-columns:1fr;}}

/* ===== Count Up Stats ===== */
.stats-bar{display:flex;flex-wrap:wrap;gap:24px;justify-content:center;margin:32px 0;}
.stat-item{text-align:center;}
.stat-num{font-size:2rem;font-weight:900;color:var(--primary);}
.stat-label{font-size:0.82rem;color:var(--text-muted);}

/* ===== Filter Buttons ===== */
.filter-bar{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin-bottom:24px;}
.filter-btn{padding:7px 16px;border-radius:20px;border:1px solid var(--border);background:var(--bg);font-size:0.85rem;cursor:pointer;transition:background var(--transition),color var(--transition),border-color var(--transition);}
.filter-btn:hover,.filter-btn.active{background:var(--primary);color:#fff;border-color:var(--primary);}

/* ===== How-To Guide ===== */
.howto-steps{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:20px;counter-reset:step;}
.howto-step{position:relative;background:var(--bg);border-radius:var(--radius);padding:24px 20px 20px 20px;box-shadow:var(--shadow);counter-increment:step;}
.howto-step::before{content:counter(step);position:absolute;top:-12px;left:20px;width:28px;height:28px;background:var(--primary);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:0.82rem;font-weight:700;}
.howto-step h4{font-size:0.95rem;font-weight:700;margin-bottom:6px;}
.howto-step p{font-size:0.85rem;color:var(--text-muted);line-height:1.6;}