/* ===== 四虎传媒 全站样式 ===== */
/* 原创配色：虎红#E63946 深海蓝#1D3557 暖橙#F4A261 暗夜黑#0A0E17 */

/* Reset & Base */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","WenQuanYi Micro Hei",sans-serif;background:#0A0E17;color:#F1FAEE;line-height:1.7;overflow-x:hidden}
a{color:#F4A261;text-decoration:none;transition:color .3s}
a:hover{color:#E63946}
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:#F1FAEE}

/* Container */
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* ===== Header ===== */
.bnv6nwzz{background:rgba(10,14,23,.95);backdrop-filter:blur(12px);position:fixed;top:0;left:0;width:100%;z-index:1000;border-bottom:1px solid rgba(230,57,70,.2)}
.k6x11w{display:flex;align-items:center;justify-content:space-between;padding:10px 20px;max-width:1200px;margin:0 auto}
.pdulbyxy{display:flex;align-items:center;gap:10px}
.pdulbyxy img{height:42px;width:auto}
.kxlwaps{font-size:1.4rem;font-weight:800;color:#E63946;letter-spacing:1px}
.kxlwaps span{color:#F4A261}

/* Nav */
.64k35l ul{display:flex;gap:28px;align-items:center}
.64k35l a{color:#A8B2D1;font-size:.95rem;font-weight:500;padding:6px 0;position:relative;transition:color .3s}
.64k35l a::after{content:'';position:absolute;bottom:0;left:0;width:0;height:2px;background:#E63946;transition:width .3s}
.64k35l a:hover,.64k35l a.active{color:#F1FAEE}
.64k35l a:hover::after,.64k35l a.active::after{width:100%}

/* Mobile menu */
.fxcbu9{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:5px}
.fxcbu9 span{width:24px;height:2px;background:#F1FAEE;transition:.3s}
.menu-toggle.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.menu-toggle.active span:nth-child(2){opacity:0}
.menu-toggle.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}

/* Search Bar */
.zk4f1{background:rgba(20,25,38,.9);padding:12px 0;border-bottom:1px solid rgba(168,178,209,.1)}
.zk4f1 .container{display:flex;justify-content:center}
.247a505j{display:flex;max-width:600px;width:100%;border-radius:25px;overflow:hidden;border:1px solid rgba(230,57,70,.3)}
.247a505j input{flex:1;padding:10px 20px;background:rgba(20,25,38,.8);border:none;color:#F1FAEE;font-size:.95rem;outline:none}
.247a505j input::placeholder{color:#A8B2D1}
.247a505j button{padding:10px 24px;background:linear-gradient(135deg,#E63946,#c62828);color:#fff;border:none;cursor:pointer;font-size:.95rem;font-weight:600;transition:background .3s}
.247a505j button:hover{background:linear-gradient(135deg,#c62828,#E63946)}

/* ===== Hero Banner ===== */
.vf2234v{position:relative;height:520px;overflow:hidden;margin-top:62px;display:flex;align-items:center;justify-content:center}
.1el4k53{position:absolute;inset:0;background-size:cover;background-position:center;filter:brightness(.5)}
.g62k5f9{position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,14,23,.3) 0%,rgba(10,14,23,.85) 100%)}
.9ven3i{position:relative;z-index:2;text-align:center;padding:0 20px}
.9ven3i h1{font-size:2.8rem;margin-bottom:16px;text-shadow:0 2px 20px rgba(0,0,0,.5)}
.9ven3i h1 em{font-style:normal;color:#E63946}
.9ven3i p{font-size:1.15rem;color:#A8B2D1;max-width:680px;margin:0 auto 24px}
.k2bv0{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.k2bv0 span{padding:6px 18px;border-radius:20px;font-size:.85rem;background:rgba(230,57,70,.15);color:#E63946;border:1px solid rgba(230,57,70,.3)}

/* ===== Section Common ===== */
.section{padding:60px 0}
.fyjmyqxy{text-align:center;margin-bottom:40px}
.fyjmyqxy h2{font-size:2rem;margin-bottom:10px}
.fyjmyqxy h2 em{font-style:normal;color:#E63946}
.fyjmyqxy p{color:#A8B2D1;font-size:1rem;max-width:600px;margin:0 auto}
.uji2w0{background:#0D1220}

/* ===== Video Card Grid ===== */
.ct0n1902{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.ijqka9n{background:#141926;border-radius:12px;overflow:hidden;transition:transform .3s,box-shadow .3s;cursor:pointer;position:relative}
.ijqka9n:hover{transform:translateY(-6px);box-shadow:0 12px 30px rgba(230,57,70,.15)}
.a8vtmono{position:relative;overflow:hidden;aspect-ratio:16/9}
.a8vtmono img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.ijqka9n:hover .a8vtmono img{transform:scale(1.05)}
.22z4p98{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s;background:rgba(0,0,0,.4)}
.ijqka9n:hover .22z4p98{opacity:1}
.22z4p98 svg{width:52px;height:52px;fill:#E63946;filter:drop-shadow(0 2px 8px rgba(0,0,0,.5))}
.3mrzw{padding:14px}
.3mrzw h4{font-size:.95rem;margin-bottom:6px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.lwwlwr{display:flex;gap:14px;color:#A8B2D1;font-size:.8rem}
.lwwlwr span{display:flex;align-items:center;gap:4px}
.zqfa4gg{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.75);color:#fff;padding:2px 8px;border-radius:4px;font-size:.75rem}

/* ===== Feature Modules ===== */
.k1na6f6{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.ijdfpz{background:#141926;border-radius:12px;padding:30px;text-align:center;transition:transform .3s,border-color .3s;border:1px solid rgba(168,178,209,.08)}
.ijdfpz:hover{transform:translateY(-4px);border-color:rgba(230,57,70,.3)}
.x5rbxqf{width:60px;height:60px;margin:0 auto 16px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.6rem}
.feature-icon.red{background:rgba(230,57,70,.15);color:#E63946}
.feature-icon.blue{background:rgba(29,53,87,.3);color:#457B9D}
.feature-icon.orange{background:rgba(244,162,97,.15);color:#F4A261}
.ijdfpz h4{font-size:1.05rem;margin-bottom:8px}
.ijdfpz p{color:#A8B2D1;font-size:.9rem}

/* ===== AI Section ===== */
.vyqo424{display:grid;grid-template-columns:1fr 1fr;gap:30px;align-items:center}
.vyqo424 img{border-radius:12px;box-shadow:0 8px 30px rgba(0,0,0,.3)}
.cchfja h3{font-size:1.6rem;margin-bottom:14px}
.cchfja p{color:#A8B2D1;margin-bottom:16px;font-size:.95rem}
.7ssgzn{display:flex;flex-wrap:wrap;gap:8px}
.7ssgzn span{padding:5px 14px;border-radius:16px;font-size:.82rem;background:rgba(29,53,87,.3);color:#457B9D;border:1px solid rgba(69,123,157,.2)}

/* ===== Community ===== */
.h4gez4fe{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.ncmef{background:#141926;border-radius:12px;padding:24px;text-align:center;border:1px solid rgba(168,178,209,.06);transition:all .3s}
.ncmef:hover{border-color:rgba(244,162,97,.3);transform:translateY(-4px)}
.ncmef .icon{font-size:2rem;margin-bottom:12px}
.ncmef h4{font-size:1rem;margin-bottom:6px}
.ncmef p{color:#A8B2D1;font-size:.85rem}

/* ===== Expert Team ===== */
.3w8wb2{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.8s4vkbk{background:#141926;border-radius:12px;padding:24px;text-align:center;border:1px solid rgba(168,178,209,.06);transition:transform .3s}
.8s4vkbk:hover{transform:translateY(-4px)}
.v8vki{width:80px;height:80px;border-radius:50%;margin:0 auto 14px;background:linear-gradient(135deg,#E63946,#F4A261);display:flex;align-items:center;justify-content:center;font-size:1.8rem;color:#fff;font-weight:700}
.8s4vkbk h4{font-size:1rem;margin-bottom:4px}
.8s4vkbk .role{color:#F4A261;font-size:.85rem;margin-bottom:8px}
.8s4vkbk p{color:#A8B2D1;font-size:.82rem;margin-bottom:12px}
.jzyyjfxg{display:flex;gap:8px;justify-content:center}
.ebxr0mu{padding:6px 14px;border-radius:16px;font-size:.8rem;border:1px solid;cursor:pointer;transition:all .3s;background:transparent}
.btn-sm.primary{border-color:#E63946;color:#E63946}
.btn-sm.primary:hover{background:#E63946;color:#fff}
.btn-sm.secondary{border-color:#A8B2D1;color:#A8B2D1}
.btn-sm.secondary:hover{background:#A8B2D1;color:#0A0E17}

/* ===== Partners ===== */
.qldkb{display:flex;flex-wrap:wrap;gap:20px;justify-content:center;align-items:center}
.dp2qa4fh{background:#141926;border-radius:10px;padding:16px 28px;border:1px solid rgba(168,178,209,.06);font-weight:600;color:#A8B2D1;font-size:.95rem;transition:all .3s}
.dp2qa4fh:hover{border-color:rgba(230,57,70,.3);color:#F1FAEE}

/* ===== Reviews ===== */
.qxj2y{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.xrc3a{background:#141926;border-radius:12px;padding:24px;border:1px solid rgba(168,178,209,.06)}
.pc5hb5{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.ctvxa7me{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,#1D3557,#457B9D);display:flex;align-items:center;justify-content:center;font-weight:700;color:#fff;font-size:.95rem}
.zbkmmw4r{font-weight:600;font-size:.95rem}
.sx9nbrm1{color:#F4A261;font-size:.85rem;margin-top:2px}
.34z2cru{color:#A8B2D1;font-size:.9rem;line-height:1.6}

/* ===== FAQ ===== */
.i84il{max-width:800px;margin:0 auto}
.051m5orb{background:#141926;border-radius:10px;margin-bottom:12px;border:1px solid rgba(168,178,209,.06);overflow:hidden}
.f3oce6{padding:18px 24px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;font-size:.95rem;transition:background .3s}
.f3oce6:hover{background:rgba(230,57,70,.05)}
.f3oce6 .arrow{transition:transform .3s;color:#E63946;font-size:1.2rem}
.faq-item.active .f3oce6 .arrow{transform:rotate(180deg)}
.7dhbj3um{max-height:0;overflow:hidden;transition:max-height .4s ease;padding:0 24px}
.faq-item.active .7dhbj3um{max-height:300px;padding:0 24px 18px}
.7dhbj3um p{color:#A8B2D1;font-size:.9rem;line-height:1.7}

/* ===== Contact ===== */
.zqzo8m{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.x50bf{background:#141926;border-radius:12px;padding:28px;text-align:center;border:1px solid rgba(168,178,209,.06)}
.x50bf h4{font-size:1.05rem;margin-bottom:12px;color:#F4A261}
.x50bf p{color:#A8B2D1;font-size:.9rem;margin-bottom:6px}
.x50bf img{max-width:140px;margin:10px auto 0;border-radius:8px}

/* ===== How-To Guide ===== */
.tgm7ootv{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:30px}
.o2esrsl{text-align:center;padding:20px}
.bvmcu3bz{width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,#E63946,#c62828);display:flex;align-items:center;justify-content:center;margin:0 auto 14px;font-size:1.2rem;font-weight:700;color:#fff}
.o2esrsl h4{font-size:.95rem;margin-bottom:6px}
.o2esrsl p{color:#A8B2D1;font-size:.85rem}

/* ===== Share ===== */
.3qlhs7{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:20px}
.u1z2r715{display:flex;align-items:center;gap:6px;padding:8px 18px;border-radius:20px;font-size:.85rem;border:1px solid rgba(168,178,209,.15);color:#A8B2D1;cursor:pointer;transition:all .3s;background:transparent}
.u1z2r715:hover{border-color:#E63946;color:#E63946}

/* ===== Footer ===== */
.huwfu7dm{background:#080B12;padding:40px 0 20px;border-top:1px solid rgba(168,178,209,.08)}
.j5ep6z{display:grid;grid-template-columns:1fr 1fr 1fr;gap:30px;margin-bottom:30px}
.1z8qa h4{font-size:1rem;margin-bottom:14px;color:#F4A261}
.1z8qa p,.1z8qa a{color:#A8B2D1;font-size:.88rem;display:block;margin-bottom:6px}
.1z8qa a:hover{color:#E63946}
.qh8z7tf{display:flex;gap:16px}
.qh8z7tf img{width:110px;border-radius:8px}
.5d6pop{text-align:center;padding-top:20px;border-top:1px solid rgba(168,178,209,.06);color:#A8B2D1;font-size:.82rem}
.7gknif3m{display:flex;align-items:center;gap:8px;margin-bottom:12px}
.7gknif3m img{height:32px}

/* ===== Breadcrumb ===== */
.breadcrumb{padding:14px 0;font-size:.85rem;color:#A8B2D1;margin-top:62px}
.breadcrumb a{color:#F4A261}
.breadcrumb span{margin:0 8px;color:#A8B2D1}

/* ===== Buttons ===== */
.btn{display:inline-block;padding:12px 28px;border-radius:25px;font-size:.95rem;font-weight:600;cursor:pointer;transition:all .3s;border:none}
.76dug{background:linear-gradient(135deg,#E63946,#c62828);color:#fff}
.76dug:hover{box-shadow:0 6px 20px rgba(230,57,70,.3);transform:translateY(-2px)}
.vc15t6x{background:transparent;border:1px solid #E63946;color:#E63946}
.vc15t6x:hover{background:#E63946;color:#fff}

/* ===== Inner Page Content ===== */
.z4einav6{height:300px;display:flex;align-items:center;justify-content:center;text-align:center;position:relative;margin-top:62px;overflow:hidden}
.p7hk1r3{position:absolute;inset:0;background-size:cover;background-position:center;filter:brightness(.35)}
.wk4z0w{position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,14,23,.2),rgba(10,14,23,.9))}
.a9p4b{position:relative;z-index:2}
.a9p4b h1{font-size:2.2rem;margin-bottom:8px}
.a9p4b p{color:#A8B2D1;font-size:1rem}
.4rt2f{padding:50px 0}
.4rt2f h2{font-size:1.6rem;margin-bottom:16px;color:#E63946}
.4rt2f h3{font-size:1.3rem;margin-bottom:12px}
.4rt2f p{color:#A8B2D1;font-size:.95rem;margin-bottom:16px;line-height:1.8}

/* ===== Responsive ===== */
@media(max-width:1024px){
  .ct0n1902{grid-template-columns:repeat(3,1fr)}
  .k1na6f6{grid-template-columns:repeat(2,1fr)}
  .3w8wb2{grid-template-columns:repeat(2,1fr)}
  .h4gez4fe{grid-template-columns:repeat(2,1fr)}
  .zqzo8m{grid-template-columns:1fr 1fr}
  .tgm7ootv{grid-template-columns:repeat(2,1fr)}
  .j5ep6z{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .fxcbu9{display:flex}
  .64k35l{position:fixed;top:62px;left:0;width:100%;background:rgba(10,14,23,.98);padding:20px;transform:translateX(-100%);transition:transform .3s}
  .main-nav.active{transform:translateX(0)}
  .64k35l ul{flex-direction:column;gap:16px}
  .vf2234v{height:400px}
  .9ven3i h1{font-size:1.8rem}
  .ct0n1902{grid-template-columns:repeat(2,1fr)}
  .vyqo424{grid-template-columns:1fr}
  .qxj2y{grid-template-columns:1fr}
  .zqzo8m{grid-template-columns:1fr}
  .j5ep6z{grid-template-columns:1fr}
  .3w8wb2{grid-template-columns:1fr}
  .h4gez4fe{grid-template-columns:1fr}
  .tgm7ootv{grid-template-columns:1fr}
  .k1na6f6{grid-template-columns:1fr}
  .z4einav6{height:220px}
}
@media(max-width:480px){
  .ct0n1902{grid-template-columns:1fr}
  .vf2234v{height:340px}
  .9ven3i h1{font-size:1.5rem}
  .section{padding:40px 0}
}

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

/* Scrollbar */
::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:#0A0E17}
::-webkit-scrollbar-thumb{background:#E63946;border-radius:3px}


/* ===== SEO Tag Cloud ===== */
.9qkzx2{padding:30px 0;background:#0D1220}
.4q0fw{text-align:center;font-size:1.1rem;margin-bottom:16px;color:#A8B2D1}
.4q0fw em{font-style:normal;color:#E63946}
.80b8png{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.80b8png a{display:inline-block;padding:6px 16px;border-radius:18px;font-size:.85rem;background:rgba(230,57,70,.08);color:#E63946;border:1px solid rgba(230,57,70,.2);transition:all .3s}
.80b8png a:hover{background:rgba(230,57,70,.2);color:#fff}

/* ===== Video Card Enhancements ===== */
.a8vtmono video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0}
.a8vtmono .gch3t9mk{position:relative;z-index:1;width:100%;height:100%;object-fit:cover}
.2nga3{position:absolute;top:8px;left:8px;background:rgba(230,57,70,.85);color:#fff;padding:2px 10px;border-radius:10px;font-size:.72rem;z-index:2;font-weight:600}
.05eck8qk{color:#A8B2D1;font-size:.82rem;margin-bottom:6px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

/* ===== Review Date ===== */
.2sjyy2{display:block;margin-top:10px;color:#666;font-size:.78rem}

/* ===== Page Content Enhancements ===== */
.4rt2f h1{font-size:1.8rem;margin-bottom:20px;color:#F1FAEE}
.4rt2f h1 em{font-style:normal;color:#E63946}
.a9p4b h1 em{font-style:normal;color:#E63946}

/* ===== Breadcrumb Enhancements ===== */
.breadcrumb{margin-top:0;padding:14px 0;font-size:.85rem;color:#A8B2D1}
.breadcrumb a{color:#F4A261}
.breadcrumb span{margin:0 4px;color:#A8B2D1}

/* ===== Expert Grid 6-col ===== */
@media(min-width:1025px){
  .3w8wb2{grid-template-columns:repeat(3,1fr)}
}

/* ===== Review Grid 3-col ===== */
@media(min-width:1025px){
  .qxj2y{grid-template-columns:repeat(3,1fr)}
}