/* ========================================
   色虎视频 - 原创样式表
   品牌：色虎视频 | hkg5mf.cn
   ======================================== */

/* CSS Reset & Base */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --brand-red:#E84430;
  --brand-dark:#1A1A2E;
  --brand-orange:#FF8C42;
  --bg-primary:#0F0F1A;
  --bg-secondary:#16162A;
  --bg-card:#1E1E36;
  --text-white:#FFFFFF;
  --text-light:#E0E0E0;
  --text-muted:#999999;
  --gradient:linear-gradient(135deg,#E84430,#FF8C42);
  --shadow:0 4px 20px rgba(0,0,0,0.3);
  --radius:12px;
  --transition:all 0.3s ease;
}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;background:var(--bg-primary);color:var(--text-light);line-height:1.7;overflow-x:hidden}
a{color:var(--brand-orange);text-decoration:none;transition:var(--transition)}
a:hover{color:var(--brand-red)}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* Header & Navigation */
.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000;background:rgba(15,15,26,0.95);backdrop-filter:blur(10px);border-bottom:1px solid rgba(232,68,48,0.2);transition:var(--transition)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:10px 20px;max-width:1200px;margin:0 auto}
.logo-wrap{display:flex;align-items:center;gap:10px}
.logo-wrap img{height:42px;width:auto}
.logo-text{font-size:1.4rem;font-weight:700;background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:6px}
.main-nav a{color:var(--text-light);padding:8px 14px;border-radius:8px;font-size:0.9rem;transition:var(--transition);white-space:nowrap}
.main-nav a:hover,.main-nav a.active{background:var(--gradient);color:#fff;-webkit-text-fill-color:#fff}
.nav-toggle{display:none;background:none;border:none;color:var(--text-white);font-size:1.5rem;cursor:pointer}

/* Search Bar */
.search-bar{background:var(--bg-secondary);padding:12px 0;border-bottom:1px solid rgba(255,255,255,0.05)}
.search-bar .container{display:flex;align-items:center;justify-content:center;gap:10px}
.search-input-wrap{display:flex;align-items:center;background:var(--bg-card);border:1px solid rgba(232,68,48,0.3);border-radius:25px;overflow:hidden;width:100%;max-width:600px}
.search-input-wrap input{background:transparent;border:none;color:var(--text-white);padding:10px 20px;flex:1;font-size:0.95rem;outline:none}
.search-input-wrap input::placeholder{color:var(--text-muted)}
.search-btn{background:var(--gradient);border:none;color:#fff;padding:10px 24px;cursor:pointer;font-size:0.9rem;transition:var(--transition)}
.search-btn:hover{opacity:0.85}
.search-hot{display:flex;gap:8px;flex-wrap:wrap;margin-left:15px}
.search-hot span{font-size:0.8rem;color:var(--text-muted);padding:4px 10px;background:rgba(255,255,255,0.05);border-radius:12px;cursor:pointer;transition:var(--transition)}
.search-hot span:hover{color:var(--brand-orange);background:rgba(255,140,66,0.1)}

/* Hero Section */
.hero{position:relative;height:70vh;min-height:450px;display:flex;align-items:center;justify-content:center;overflow:hidden;margin-top:62px}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;filter:brightness(0.4)}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(15,15,26,0.3) 0%,rgba(15,15,26,0.8) 100%)}
.hero-content{position:relative;z-index:2;text-align:center;padding:0 20px;max-width:800px}
.hero-content h1{font-size:2.8rem;font-weight:800;margin-bottom:16px;line-height:1.3}
.hero-content h1 .brand-highlight{background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-content p{font-size:1.15rem;color:var(--text-light);margin-bottom:28px;line-height:1.8}
.hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn-primary{display:inline-block;padding:12px 32px;background:var(--gradient);color:#fff;border-radius:25px;font-weight:600;font-size:1rem;transition:var(--transition);border:none;cursor:pointer}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 25px rgba(232,68,48,0.4);color:#fff}
.btn-outline{display:inline-block;padding:12px 32px;border:2px solid var(--brand-red);color:var(--brand-red);border-radius:25px;font-weight:600;font-size:1rem;transition:var(--transition);background:transparent;cursor:pointer}
.btn-outline:hover{background:var(--brand-red);color:#fff}

/* Section Common */
.section{padding:70px 0}
.section-header{text-align:center;margin-bottom:45px}
.section-header h2{font-size:2rem;font-weight:700;margin-bottom:12px;color:var(--text-white)}
.section-header h2 .hl{color:var(--brand-red)}
.section-header p{color:var(--text-muted);font-size:1rem;max-width:650px;margin:0 auto}
.section-alt{background:var(--bg-secondary)}

/* Video Card Grid - HTML5 Video */
.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.video-card{background:var(--bg-card);border-radius:var(--radius);overflow:hidden;transition:var(--transition);cursor:pointer;position:relative}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 35px rgba(232,68,48,0.2)}
.video-thumb{position:relative;padding-top:56.25%;overflow:hidden}
.video-thumb video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:var(--transition);background:var(--bg-card)}
.video-thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:var(--transition)}
.video-card:hover .video-thumb video,.video-card:hover .video-thumb img{transform:scale(1.05)}
.play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%) scale(0.8);width:54px;height:54px;background:rgba(232,68,48,0.85);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:var(--transition);z-index:2;cursor:pointer}
.play-btn::after{content:'';display:block;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 .play-btn{opacity:1;transform:translate(-50%,-50%) scale(1)}
.play-btn:hover{background:rgba(232,68,48,1);box-shadow:0 0 20px rgba(232,68,48,0.5)}
.video-duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,0.75);color:#fff;padding:2px 8px;border-radius:4px;font-size:0.75rem;z-index:2}
.video-info{padding:14px}
.video-info h3{font-size:0.95rem;color:var(--text-white);margin-bottom:6px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;align-items:center;gap:12px;font-size:0.8rem;color:var(--text-muted)}
.video-meta span{display:flex;align-items:center;gap:4px}

/* Service Cards */
.service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.service-card{background:var(--bg-card);border-radius:var(--radius);padding:30px;text-align:center;transition:var(--transition);border:1px solid rgba(255,255,255,0.05)}
.service-card:hover{border-color:var(--brand-red);transform:translateY(-4px);box-shadow:var(--shadow)}
.service-icon{width:64px;height:64px;margin:0 auto 18px;background:var(--gradient);border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:1.8rem}
.service-card h3{font-size:1.1rem;color:var(--text-white);margin-bottom:10px}
.service-card p{font-size:0.9rem;color:var(--text-muted);line-height:1.6}

/* Expert Section */
.expert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.expert-card{background:var(--bg-card);border-radius:var(--radius);overflow:hidden;text-align:center;transition:var(--transition);border:1px solid rgba(255,255,255,0.05)}
.expert-card:hover{border-color:var(--brand-orange);box-shadow:var(--shadow)}
.expert-avatar{width:100px;height:100px;border-radius:50%;margin:24px auto 14px;overflow:hidden;border:3px solid var(--brand-red)}
.expert-avatar img{width:100%;height:100%;object-fit:cover}
.expert-card h3{font-size:1rem;color:var(--text-white);margin-bottom:4px}
.expert-card .expert-title{font-size:0.85rem;color:var(--brand-orange);margin-bottom:10px}
.expert-card p{font-size:0.8rem;color:var(--text-muted);padding:0 16px;margin-bottom:16px;line-height:1.5}
.expert-links{display:flex;justify-content:center;gap:10px;padding-bottom:20px}
.expert-links a{padding:6px 14px;border-radius:15px;font-size:0.8rem;border:1px solid var(--brand-red);color:var(--brand-red);transition:var(--transition)}
.expert-links a:hover{background:var(--brand-red);color:#fff}

/* Brand Wall */
.brand-wall{display:flex;flex-wrap:wrap;justify-content:center;gap:30px;align-items:center}
.brand-wall .brand-item{background:var(--bg-card);padding:20px 30px;border-radius:var(--radius);min-width:160px;text-align:center;font-size:1rem;font-weight:600;color:var(--text-muted);border:1px solid rgba(255,255,255,0.05);transition:var(--transition)}
.brand-wall .brand-item:hover{border-color:var(--brand-orange);color:var(--brand-orange)}

/* Reviews */
.review-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.review-card{background:var(--bg-card);border-radius:var(--radius);padding:24px;border:1px solid rgba(255,255,255,0.05)}
.review-header{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.review-avatar{width:44px;height:44px;border-radius:50%;background:var(--gradient);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:1rem}
.review-name{font-size:0.95rem;color:var(--text-white)}
.review-date{font-size:0.8rem;color:var(--text-muted)}
.review-stars{color:var(--brand-orange);margin-bottom:8px;font-size:0.9rem}
.review-text{font-size:0.9rem;color:var(--text-light);line-height:1.7}

/* FAQ */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:var(--bg-card);border-radius:var(--radius);margin-bottom:12px;overflow:hidden;border:1px solid rgba(255,255,255,0.05)}
.faq-question{padding:18px 24px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-size:1rem;color:var(--text-white);font-weight:600;transition:var(--transition)}
.faq-question:hover{color:var(--brand-orange)}
.faq-question .faq-toggle{font-size:1.2rem;transition:var(--transition);color:var(--brand-red)}
.faq-answer{padding:0 24px;max-height:0;overflow:hidden;transition:max-height 0.3s ease,padding 0.3s ease}
.faq-item.active .faq-answer{max-height:300px;padding:0 24px 18px}
.faq-item.active .faq-toggle{transform:rotate(45deg)}
.faq-answer p{font-size:0.9rem;color:var(--text-muted);line-height:1.7}

/* Contact Section */
.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:30px}
.contact-info{background:var(--bg-card);border-radius:var(--radius);padding:30px}
.contact-info h3{font-size:1.2rem;color:var(--text-white);margin-bottom:16px}
.contact-item{display:flex;align-items:flex-start;gap:12px;margin-bottom:14px}
.contact-item .ci-label{font-size:0.85rem;color:var(--text-muted);min-width:70px}
.contact-item .ci-value{font-size:0.9rem;color:var(--text-light)}
.contact-qr{display:flex;gap:20px;margin-top:20px}
.contact-qr .qr-box{text-align:center}
.contact-qr .qr-box img{width:120px;height:120px;border-radius:8px;margin-bottom:8px}
.contact-qr .qr-box span{font-size:0.8rem;color:var(--text-muted)}

/* Community Guide */
.guide-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:30px}
.guide-step{text-align:center;padding:20px}
.guide-step .step-num{width:48px;height:48px;border-radius:50%;background:var(--gradient);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:1.2rem;margin:0 auto 14px}
.guide-step h4{font-size:0.95rem;color:var(--text-white);margin-bottom:8px}
.guide-step p{font-size:0.85rem;color:var(--text-muted)}

/* Social Share */
.social-share{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}
.social-share a{display:flex;align-items:center;gap:6px;padding:10px 20px;background:var(--bg-card);border-radius:25px;color:var(--text-light);font-size:0.9rem;border:1px solid rgba(255,255,255,0.05);transition:var(--transition)}
.social-share a:hover{border-color:var(--brand-red);color:var(--brand-red);background:rgba(232,68,48,0.1)}

/* Footer */
.site-footer{background:var(--brand-dark);border-top:2px solid var(--brand-red);padding:50px 0 0}
.footer-top{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px;padding-bottom:30px;border-bottom:1px solid rgba(255,255,255,0.08)}
.footer-brand .logo-wrap{margin-bottom:12px}
.footer-brand p{font-size:0.85rem;color:var(--text-muted);line-height:1.6;margin-bottom:16px}
.footer-col h4{font-size:1rem;color:var(--text-white);margin-bottom:14px;position:relative;padding-bottom:8px}
.footer-col h4::after{content:'';position:absolute;bottom:0;left:0;width:30px;height:2px;background:var(--gradient)}
.footer-col a{display:block;font-size:0.85rem;color:var(--text-muted);padding:4px 0;transition:var(--transition)}
.footer-col a:hover{color:var(--brand-orange);padding-left:4px}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;padding:20px 0;flex-wrap:wrap;gap:10px}
.footer-bottom p{font-size:0.8rem;color:var(--text-muted)}
.footer-qr{display:flex;gap:16px}
.footer-qr .qr-item{text-align:center}
.footer-qr .qr-item img{width:80px;height:80px;border-radius:6px;margin-bottom:4px}
.footer-qr .qr-item span{font-size:0.7rem;color:var(--text-muted)}

/* Breadcrumb */
.breadcrumb{padding:12px 0;font-size:0.85rem}
.breadcrumb a{color:var(--text-muted)}
.breadcrumb a:hover{color:var(--brand-orange)}
.breadcrumb span{color:var(--text-muted);margin:0 6px}
.breadcrumb .current{color:var(--brand-red)}

/* AI Feature Cards */
.ai-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.ai-card{background:var(--bg-card);border-radius:var(--radius);padding:28px;border:1px solid rgba(255,255,255,0.05);transition:var(--transition);position:relative;overflow:hidden}
.ai-card::before{content:'';position:absolute;top:0;left:0;width:100%;height:3px;background:var(--gradient)}
.ai-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.ai-card h3{font-size:1.05rem;color:var(--text-white);margin-bottom:10px}
.ai-card p{font-size:0.88rem;color:var(--text-muted);line-height:1.6}

/* Community Features */
.community-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.community-card{background:var(--bg-card);border-radius:var(--radius);padding:24px;text-align:center;border:1px solid rgba(255,255,255,0.05);transition:var(--transition)}
.community-card:hover{border-color:var(--brand-orange)}
.community-card .comm-icon{font-size:2.2rem;margin-bottom:12px}
.community-card h3{font-size:1rem;color:var(--text-white);margin-bottom:8px}
.community-card p{font-size:0.85rem;color:var(--text-muted)}

/* Tags */
.tag-list{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.tag{padding:4px 12px;background:rgba(232,68,48,0.1);color:var(--brand-red);border-radius:15px;font-size:0.8rem;transition:var(--transition)}
.tag:hover{background:var(--brand-red);color:#fff}

/* Responsive */
@media(max-width:1024px){
  .video-grid{grid-template-columns:repeat(3,1fr)}
  .service-grid,.ai-grid,.community-grid{grid-template-columns:repeat(2,1fr)}
  .expert-grid{grid-template-columns:repeat(2,1fr)}
  .footer-top{grid-template-columns:1fr 1fr}
  .guide-steps{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .header-inner{flex-wrap:wrap}
  .main-nav{display:none;width:100%;flex-direction:column;padding:10px 0}
  .main-nav.show{display:flex}
  .nav-toggle{display:block}
  .hero{height:55vh;min-height:350px}
  .hero-content h1{font-size:1.8rem}
  .video-grid{grid-template-columns:repeat(2,1fr)}
  .service-grid,.ai-grid,.community-grid{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:repeat(2,1fr)}
  .review-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;text-align:center}
  .guide-steps{grid-template-columns:1fr 1fr}
  .search-hot{display:none}
  .section{padding:45px 0}
  .section-header h2{font-size:1.5rem}
}
@media(max-width:480px){
  .video-grid{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:1fr}
  .guide-steps{grid-template-columns:1fr}
  .hero-content h1{font-size:1.5rem}
}

/* Lazy Load */
img[data-src]{opacity:0;transition:opacity 0.3s}
img.loaded{opacity:1}

/* Page specific */
.page-hero{padding:100px 0 40px;background:var(--bg-secondary);text-align:center}
.page-hero h1{font-size:2.2rem;color:var(--text-white);margin-bottom:10px}
.page-hero p{color:var(--text-muted);font-size:1rem}
.content-section{padding:50px 0}
.content-section h2{font-size:1.6rem;color:var(--text-white);margin-bottom:16px}
.content-section h3{font-size:1.2rem;color:var(--brand-orange);margin-bottom:10px}
.content-section p{color:var(--text-light);line-height:1.8;margin-bottom:16px}

/* About page */
.about-intro{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.about-intro img{border-radius:var(--radius)}
.timeline{position:relative;padding-left:30px}
.timeline::before{content:'';position:absolute;left:10px;top:0;bottom:0;width:2px;background:var(--gradient)}
.timeline-item{position:relative;margin-bottom:30px;padding-left:20px}
.timeline-item::before{content:'';position:absolute;left:-24px;top:6px;width:12px;height:12px;border-radius:50%;background:var(--brand-red)}
.timeline-item h4{color:var(--brand-orange);font-size:0.95rem;margin-bottom:4px}
.timeline-item p{color:var(--text-muted);font-size:0.9rem}