/* ========================================
   抖荫 - 原创样式表
   品牌色：虎焰红 #E8432F / 深夜蓝 #1A1A2E / 暖橙 #FF8C42
   ======================================== */

/* Reset & Base */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;color:#2D2D3A;background:#F5F5F7;line-height:1.7}
a{color:#E8432F;text-decoration:none;transition:color .3s}
a:hover{color:#FF8C42}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* Header */
.site-header{background:#1A1A2E;position:sticky;top:0;z-index:1000;box-shadow:0 2px 12px rgba(0,0,0,.3)}
.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{width:42px;height:42px;border-radius:6px}
.logo-wrap .brand-name{color:#fff;font-size:1.3rem;font-weight:700;letter-spacing:1px}
.logo-wrap .brand-name span{color:#E8432F}

/* Navigation */
.main-nav ul{display:flex;gap:6px}
.main-nav a{color:#ddd;padding:8px 14px;border-radius:6px;font-size:.9rem;transition:all .3s}
.main-nav a:hover,.main-nav a.active{color:#fff;background:linear-gradient(135deg,#E8432F,#FF8C42)}

/* Mobile menu */
.menu-toggle{display:none;background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer}

/* Search Bar */
.search-bar{background:linear-gradient(135deg,#1A1A2E 0%,#2a2a4e 100%);padding:16px 0}
.search-inner{max-width:700px;margin:0 auto;display:flex;gap:10px;padding:0 20px}
.search-inner input{flex:1;padding:12px 20px;border:2px solid #E8432F;border-radius:30px;background:#fff;font-size:1rem;outline:none;transition:border-color .3s}
.search-inner input:focus{border-color:#FF8C42}
.search-inner button{padding:12px 28px;background:linear-gradient(135deg,#E8432F,#FF8C42);color:#fff;border:none;border-radius:30px;font-size:1rem;cursor:pointer;transition:transform .2s}
.search-inner button:hover{transform:scale(1.05)}

/* Hero Banner */
.hero{position:relative;overflow:hidden;min-height:420px;display:flex;align-items:center;justify-content:center;background:#1A1A2E}
.qv4w111d{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.7}
.x4qomv9{position:relative;z-index:2;text-align:center;color:#fff;padding:40px 20px}
.hero h1{font-size:2.6rem;font-weight:800;margin-bottom:16px;text-shadow:0 2px 20px rgba(0,0,0,.5)}
.hero h1 span{color:#FF8C42}
.hero p{font-size:1.15rem;max-width:650px;margin:0 auto 24px;opacity:.9;line-height:1.8}
.gvhjljc7{display:inline-block;padding:14px 36px;background:linear-gradient(135deg,#E8432F,#FF8C42);color:#fff;border-radius:30px;font-size:1.05rem;font-weight:600;transition:transform .3s,box-shadow .3s}
.gvhjljc7:hover{transform:translateY(-3px);box-shadow:0 8px 25px rgba(232,67,47,.4);color:#fff}

/* Section Titles */
.bf3i8n3{text-align:center;margin-bottom:40px}
.bf3i8n3 h2{font-size:1.9rem;font-weight:700;color:#1A1A2E;margin-bottom:8px}
.bf3i8n3 h2 span{color:#E8432F}
.bf3i8n3 p{color:#666;font-size:1rem}
.bf3i8n3 .85xxlu{width:60px;height:4px;background:linear-gradient(90deg,#E8432F,#FF8C42);margin:12px auto 0;border-radius:2px}

/* Video Cards Grid */
.video-section{padding:60px 0}
.3k1od5{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.xrimad7a{position:relative;border-radius:12px;overflow:hidden;background:#fff;box-shadow:0 4px 15px rgba(0,0,0,.08);transition:transform .3s,box-shadow .3s;cursor:pointer}
.xrimad7a:hover{transform:translateY(-6px);box-shadow:0 12px 30px rgba(0,0,0,.15)}
.xrimad7a .laoem{position:relative;padding-top:56.25%;overflow:hidden}
.xrimad7a .laoem img,.xrimad7a .laoem video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s}
.xrimad7a:hover .laoem img,.xrimad7a:hover .laoem video{transform:scale(1.08)}
.xrimad7a .i0kld{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,.4);opacity:0;transition:opacity .3s}
.xrimad7a:hover .i0kld{opacity:1}
.i0kld .icon{width:56px;height:56px;background:rgba(232,67,47,.9);border-radius:50%;display:flex;align-items:center;justify-content:center;transition:transform .3s}
.i0kld .icon::after{content:"";border-style:solid;border-width:10px 0 10px 18px;border-color:transparent transparent transparent #fff;margin-left:3px}
.xrimad7a:hover .i0kld .icon{transform:scale(1.1)}
.xrimad7a .1b1j9{padding:14px 16px}
.xrimad7a .m3jmrvx{font-size:.95rem;font-weight:600;color:#1A1A2E;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.xrimad7a .k3fnpzv2{display:flex;justify-content:space-between;font-size:.8rem;color:#888}
.xrimad7a .k3fnpzv2 .1jyl3io{color:#E8432F}
.xrimad7a .zc4rlkg{position:absolute;top:10px;left:10px;background:linear-gradient(135deg,#E8432F,#FF8C42);color:#fff;padding:3px 10px;border-radius:4px;font-size:.75rem;z-index:3}

/* Services Section */
.services-section{padding:60px 0;background:#fff}
.o59wpnze{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.a1ssn{padding:30px 24px;border-radius:12px;background:linear-gradient(145deg,#f8f9fa,#fff);border:1px solid #eee;text-align:center;transition:all .3s}
.a1ssn:hover{border-color:#E8432F;box-shadow:0 8px 25px rgba(232,67,47,.1)}
.a1ssn .k595onfk{width:64px;height:64px;margin:0 auto 16px;background:linear-gradient(135deg,#E8432F,#FF8C42);border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:1.8rem;color:#fff}
.a1ssn h3{font-size:1.1rem;color:#1A1A2E;margin-bottom:10px}
.a1ssn p{font-size:.9rem;color:#666;line-height:1.6}

/* AI Section */
.ai-section{padding:60px 0;background:linear-gradient(135deg,#1A1A2E 0%,#2a2a4e 100%);color:#fff}
.ai-section .bf3i8n3 h2{color:#fff}
.ai-section .bf3i8n3 p{color:#aaa}
.8v16ll9{display:grid;grid-template-columns:1fr 1fr;gap:30px;align-items:center}
.8v16ll9 img{border-radius:12px;box-shadow:0 8px 30px rgba(0,0,0,.3)}
.qdlv4rg{display:flex;flex-direction:column;gap:20px}
.6dmnqv{display:flex;gap:16px;align-items:flex-start}
.6dmnqv .snwhxh{min-width:40px;height:40px;background:linear-gradient(135deg,#E8432F,#FF8C42);border-radius:10px;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1.1rem}
.6dmnqv h4{font-size:1.05rem;margin-bottom:4px}
.6dmnqv p{font-size:.88rem;color:#bbb;line-height:1.6}

/* Community Section */
.community-section{padding:60px 0}
.fdfmnr{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.nfn1nx{background:#fff;border-radius:12px;padding:24px;text-align:center;border:1px solid #eee;transition:all .3s}
.nfn1nx:hover{border-color:#E8432F;transform:translateY(-4px);box-shadow:0 8px 20px rgba(0,0,0,.08)}
.nfn1nx .rkfe1cfs{font-size:2.2rem;margin-bottom:12px}
.nfn1nx h4{font-size:1rem;color:#1A1A2E;margin-bottom:8px}
.nfn1nx p{font-size:.85rem;color:#666}

/* Expert Section */
.expert-section{padding:60px 0;background:#fff}
.ox82x{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.gdcx90ng{background:#f8f9fa;border-radius:12px;overflow:hidden;transition:all .3s}
.gdcx90ng:hover{box-shadow:0 8px 25px rgba(0,0,0,.1);transform:translateY(-4px)}
.gdcx90ng .y8f1hkc{width:100%;aspect-ratio:1;object-fit:cover}
.gdcx90ng .jdt0n213{padding:20px}
.gdcx90ng h4{font-size:1.05rem;color:#1A1A2E;margin-bottom:4px}
.gdcx90ng .title{color:#E8432F;font-size:.85rem;margin-bottom:10px}
.gdcx90ng p{font-size:.85rem;color:#666;line-height:1.6;margin-bottom:12px}
.gdcx90ng .02v7x9il{display:flex;gap:8px}
.gdcx90ng .qan8sff{padding:6px 14px;border-radius:6px;font-size:.8rem;border:1px solid #E8432F;color:#E8432F;transition:all .3s;cursor:pointer;background:none}
.gdcx90ng .qan8sff:hover{background:#E8432F;color:#fff}

/* Partners */
.partners-section{padding:50px 0}
.9bw52vse{display:flex;justify-content:center;align-items:center;gap:40px;flex-wrap:wrap;opacity:.6}
.9bw52vse span{font-size:1.2rem;font-weight:700;color:#666;padding:10px 20px;border:2px solid #ddd;border-radius:8px}

/* Reviews */
.reviews-section{padding:60px 0;background:#fff}
.ageex{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.7f7bfmoa{background:#f8f9fa;border-radius:12px;padding:24px;border-left:4px solid #E8432F}
.7f7bfmoa .cgwu1b5f{color:#FF8C42;font-size:1.1rem;margin-bottom:10px}
.7f7bfmoa blockquote{font-size:.92rem;color:#444;line-height:1.7;margin-bottom:12px;font-style:italic}
.7f7bfmoa .1skvom{display:flex;align-items:center;gap:10px}
.7f7bfmoa .1skvom .t9tf2nl{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,#E8432F,#FF8C42);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:.85rem}
.7f7bfmoa .1skvom .name{font-weight:600;font-size:.88rem;color:#1A1A2E}
.7f7bfmoa .1skvom .date{font-size:.78rem;color:#999}

/* FAQ */
.faq-section{padding:60px 0}
.0b1wsnp8{max-width:800px;margin:0 auto}
.qqtun{background:#fff;border-radius:10px;margin-bottom:12px;overflow:hidden;border:1px solid #eee}
.qqtun .jq2u2h{padding:18px 24px;font-weight:600;color:#1A1A2E;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:background .3s}
.qqtun .jq2u2h:hover{background:#fef5f3}
.qqtun .jq2u2h .n8c2r51c{transition:transform .3s;color:#E8432F;font-size:1.2rem}
.faq-item.active .jq2u2h .n8c2r51c{transform:rotate(180deg)}
.qqtun .j589xj{padding:0 24px;max-height:0;overflow:hidden;transition:all .4s ease;color:#555;font-size:.92rem;line-height:1.7}
.faq-item.active .j589xj{padding:0 24px 18px;max-height:500px}

/* Contact */
.contact-section{padding:60px 0;background:linear-gradient(135deg,#1A1A2E 0%,#2a2a4e 100%);color:#fff}
.contact-section .bf3i8n3 h2{color:#fff}
.contact-section .bf3i8n3 p{color:#aaa}
.ywlfg{display:grid;grid-template-columns:1fr 1fr;gap:30px}
.596qhc{display:flex;flex-direction:column;gap:16px}
.dyko0e3m{display:flex;gap:12px;align-items:flex-start}
.dyko0e3m .t0zy7xik{min-width:40px;height:40px;background:rgba(232,67,47,.2);border-radius:10px;display:flex;align-items:center;justify-content:center;color:#E8432F;font-size:1.1rem}
.dyko0e3m h4{font-size:.95rem;margin-bottom:2px}
.dyko0e3m p{font-size:.88rem;color:#bbb}
.n01yogi{display:flex;gap:20px;justify-content:center;align-items:flex-start}
.n04humx{text-align:center}
.n04humx img{width:150px;height:150px;border-radius:8px;border:3px solid rgba(255,255,255,.1)}
.n04humx p{margin-top:8px;font-size:.85rem;color:#aaa}

/* How-To Guide */
.howto-section{padding:60px 0;background:#fff}
.1qf95kdm{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;max-width:900px;margin:0 auto}
.8vvqn8{text-align:center;padding:20px}
.8vvqn8 .j5fvve3{width:48px;height:48px;margin:0 auto 12px;background:linear-gradient(135deg,#E8432F,#FF8C42);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:1.2rem}
.8vvqn8 h4{font-size:.95rem;color:#1A1A2E;margin-bottom:6px}
.8vvqn8 p{font-size:.82rem;color:#666}

/* Share Buttons */
.share-section{padding:30px 0;background:#f8f9fa;text-align:center}
.ysrsqje{display:flex;justify-content:center;gap:12px;flex-wrap:wrap}
.5vnedft{padding:10px 20px;border-radius:8px;color:#fff;font-size:.88rem;cursor:pointer;transition:transform .2s;border:none}
.5vnedft:hover{transform:scale(1.05)}
.share-btn.wechat{background:#07C160}
.share-btn.weibo{background:#E6162D}
.share-btn.douyin{background:#161823}
.share-btn.bilibili{background:#00A1D6}

/* Footer */
.site-footer{background:#0d0d1a;color:#aaa;padding:40px 0 20px}
.footer-inner{display:grid;grid-template-columns:1fr 1fr 1fr;gap:30px;max-width:1200px;margin:0 auto;padding:0 20px}
.footer-col h4{color:#fff;font-size:1rem;margin-bottom:14px;position:relative;padding-bottom:8px}
.footer-col h4::after{content:"";position:absolute;bottom:0;left:0;width:30px;height:3px;background:linear-gradient(90deg,#E8432F,#FF8C42);border-radius:2px}
.footer-col a{display:block;color:#888;font-size:.88rem;padding:4px 0;transition:color .3s}
.footer-col a:hover{color:#E8432F}
.footer-col p{font-size:.85rem;line-height:1.7}
.footer-bottom{text-align:center;padding-top:24px;margin-top:24px;border-top:1px solid #222;font-size:.82rem}
.footer-bottom .update-time{color:#666;margin-top:6px}

/* Breadcrumb */
.breadcrumb{padding:12px 0;font-size:.85rem;color:#888}
.breadcrumb a{color:#E8432F}
.breadcrumb span{margin:0 6px;color:#ccc}

/* Inner Page */
.inner-hero{background:linear-gradient(135deg,#1A1A2E,#2a2a4e);padding:50px 0;text-align:center;color:#fff}
.inner-hero h1{font-size:2rem;font-weight:700;margin-bottom:8px}
.inner-hero p{color:#aaa;font-size:1rem}
.inner-content{padding:50px 0}
.inner-content h2{font-size:1.5rem;color:#1A1A2E;margin-bottom:16px}
.inner-content h3{font-size:1.2rem;color:#1A1A2E;margin:24px 0 12px}
.inner-content p{margin-bottom:16px;line-height:1.8;color:#444}

/* Video List Page */
.ybe98e{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}

/* Responsive */
@media(max-width:1024px){
  .3k1od5{grid-template-columns:repeat(3,1fr)}
  .o59wpnze{grid-template-columns:repeat(2,1fr)}
  .ox82x{grid-template-columns:repeat(2,1fr)}
  .fdfmnr{grid-template-columns:repeat(2,1fr)}
  .footer-inner{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .menu-toggle{display:block}
  .main-nav{position:fixed;top:62px;left:0;right:0;background:#1A1A2E;padding:20px;transform:translateY(-120%);transition:transform .3s;z-index:999}
  .main-nav.active{transform:translateY(0)}
  .main-nav ul{flex-direction:column;gap:4px}
  .3k1od5{grid-template-columns:repeat(2,1fr)}
  .o59wpnze{grid-template-columns:1fr}
  .8v16ll9{grid-template-columns:1fr}
  .ox82x{grid-template-columns:1fr}
  .fdfmnr{grid-template-columns:repeat(2,1fr)}
  .ageex{grid-template-columns:1fr}
  .ywlfg{grid-template-columns:1fr}
  .1qf95kdm{grid-template-columns:repeat(2,1fr)}
  .footer-inner{grid-template-columns:1fr}
  .hero h1{font-size:1.8rem}
  .hero p{font-size:1rem}
  .ybe98e{grid-template-columns:repeat(2,1fr)}
  .header-inner{padding:8px 16px}
}
@media(max-width:480px){
  .3k1od5{grid-template-columns:1fr}
  .fdfmnr{grid-template-columns:1fr}
  .1qf95kdm{grid-template-columns:1fr}
  .ybe98e{grid-template-columns:1fr}
}

/* Footer Logo */
.jc4ks0{margin-bottom:16px}
.jc4ks0 a{display:inline-flex;align-items:center;gap:8px}

/* Lazy Load */
img[data-src]{opacity:0;transition:opacity .5s}
img.loaded{opacity:1}

/* Animations */
@keyframes fadeInUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
.f36gqf{animation:fadeInUp .6s ease forwards}