:root{--bg:#FFFFFF;--bg-alt:#F8F9FB;--t:#1A1A2E;--ts:#5C6B73;--b:#2563EB;--bd:#1E40AF;--w:#C68642;--wd:#A0522D;--rb:8px;--rc:12px;--ri:16px;--sh:0 4px 24px rgba(0,0,0,.06);--shh:0 8px 32px rgba(0,0,0,.12);--nh:72px}
*,::before,::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:var(--nh)}
body{font-family:"PingFang SC","Noto Sans SC","Microsoft YaHei","Inter",-apple-system,sans-serif;color:var(--t);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{text-decoration:none;color:inherit}img,svg{display:block;max-width:100%}
button{cursor:pointer;border:none;background:none}
.container{max-width:1200px;margin:0 auto;padding:0 24px}

/* nav */
.nav{position:fixed;top:0;left:0;right:0;z-index:1000;height:var(--nh);display:flex;align-items:center;justify-content:space-between;padding:0 40px;transition:background .35s,box-shadow .35s,backdrop-filter .35s}
.nav.scrolled{background:rgba(255,255,255,.85);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);box-shadow:0 1px 0 rgba(0,0,0,.06),0 8px 24px rgba(0,0,0,.04)}
.nav-logo{display:flex;align-items:center;gap:12px;font-size:18px;font-weight:700;letter-spacing:1px;white-space:nowrap}
.nav-logo img{width:40px;height:40px;border-radius:8px}
.nav-links{display:flex;align-items:center;gap:36px;list-style:none}
.nav-links a{font-size:15px;font-weight:500;color:var(--t);position:relative;padding:6px 0;transition:color .3s}
.nav-links a::after{content:"";position:absolute;bottom:0;left:0;width:0;height:2px;border-radius:2px;background:var(--b);transition:width .35s cubic-bezier(.25,.8,.25,1.2)}
.nav-links a:hover::after,.nav-links a.active::after{width:100%}
.nav-links a:hover,.nav-links a.active{color:var(--b)}
.nav-mobile{display:none;padding:8px}
.nav-mobile span{display:block;width:24px;height:2px;border-radius:2px;background:var(--t);margin:5px 0;transition:transform .35s,opacity .35s}
.nav-mobile.open span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.nav-mobile.open span:nth-child(2){opacity:0}
.nav-mobile.open span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}

/* anim */
.sr{opacity:0;filter:blur(6px);transform:translateY(40px);transition:opacity .8s,transform .8s,filter .8s;transition-timing-function:cubic-bezier(.22,.61,.36,1)}
.sr.visible{opacity:1;filter:blur(0);transform:none}
.sr-l{transform:translateX(-40px)}.sr-r{transform:translateX(40px)}.sr-s{transform:scale(.92)}
.sd1{transition-delay:.05s}.sd2{transition-delay:.12s}.sd3{transition-delay:.19s}.sd4{transition-delay:.26s}.sd5{transition-delay:.33s}

/* sec-head */
.sec-head{text-align:center;margin-bottom:64px}
.sec-tag{display:inline-block;font-size:13px;letter-spacing:4px;color:var(--ts);margin-bottom:14px;position:relative}
.sec-tag::before,.sec-tag::after{content:"";position:absolute;top:50%;width:28px;height:1px;opacity:.4}
.sec-tag::before{right:calc(100% + 14px);background:linear-gradient(90deg,transparent,var(--ts))}
.sec-tag::after{left:calc(100% + 14px);background:linear-gradient(90deg,var(--ts),transparent)}
.sec-title{font-size:38px;font-weight:700;letter-spacing:1px;line-height:1.3}
.sec-sub{margin-top:14px;color:var(--ts);font-size:17px;max-width:640px;margin-left:auto;margin-right:auto}

/* btn */
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;border-radius:var(--rb);font-size:16px;font-weight:600;position:relative;overflow:hidden;isolation:isolate;transition:color .4s,box-shadow .4s,transform .3s}
.btn:active{transform:scale(.97)}
.btn::before{content:"";position:absolute;inset:0;z-index:-1;transform:scaleX(0);transform-origin:left;transition:transform .4s cubic-bezier(.25,.8,.25,1)}
.btn:hover::before{transform:scaleX(1)}
.btn-p{border:2px solid var(--b);color:#fff;background:linear-gradient(135deg,var(--b),var(--bd))}
.btn-p::before{background:var(--bd)}.btn-p:hover{box-shadow:0 8px 24px rgba(37,99,235,.3)}
.btn-o{border:2px solid var(--b);color:var(--b);background:transparent}
.btn-o::before{background:linear-gradient(135deg,var(--b),var(--bd))}.btn-o:hover{color:#fff;box-shadow:0 8px 24px rgba(37,99,235,.3)}
.btn-w{border:2px solid var(--w);color:#fff;background:linear-gradient(135deg,var(--w),var(--wd))}
.btn-w::before{background:var(--wd)}.btn-w:hover{box-shadow:0 8px 24px rgba(198,134,66,.35)}

/* cursor */
.glow-c{position:fixed;pointer-events:none;z-index:9999;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(37,99,235,.15) 0%,rgba(37,99,235,.05) 28%,transparent 65%);transform:translate(-50%,-50%);will-change:left,top;opacity:.55}
.ring-c{position:fixed;pointer-events:none;z-index:9999;width:28px;height:28px;border-radius:50%;border:1.5px solid rgba(37,99,235,.45);transform:translate(-50%,-50%);will-change:left,top;box-shadow:0 0 14px rgba(37,99,235,.25),inset 0 0 8px rgba(37,99,235,.08);transition:width .2s,height .2s,border-color .2s}
.ring-c.clk{width:16px;height:16px;border-color:rgba(37,99,235,.7)}
.dot-c{position:fixed;pointer-events:none;z-index:9999;width:6px;height:6px;border-radius:50%;background:var(--b);transform:translate(-50%,-50%);will-change:left,top;box-shadow:0 0 10px var(--b),0 0 20px rgba(37,99,235,.4)}
.trail-c{position:fixed;pointer-events:none;z-index:9998;width:3px;height:3px;border-radius:50%;background:var(--b);box-shadow:0 0 6px var(--b);animation:trailFade .8s ease-out forwards}
@keyframes trailFade{0%{opacity:.8;transform:translate(-50%,-50%) scale(1)}100%{opacity:0;transform:translate(-50%,-50%) scale(0)}}

/* grid bg */
.bg-grid{position:absolute;inset:0;pointer-events:none;z-index:0;overflow:hidden;opacity:.06}
.bg-grid::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(37,99,235,.5) 1px,transparent 1px),linear-gradient(90deg,rgba(37,99,235,.5) 1px,transparent 1px);background-size:60px 60px;-webkit-mask-image:radial-gradient(ellipse 70% 60% at 50% 40%,black 30%,transparent 70%);mask-image:radial-gradient(ellipse 70% 60% at 50% 40%,black 30%,transparent 70%)}

/* hero */
.hero{min-height:100vh;display:flex;align-items:center;background:linear-gradient(180deg,#FFF 0%,var(--bg-alt) 100%);position:relative;padding:100px 0 80px;overflow:hidden}
.hero .bg-grid{opacity:.06}
.hero-inner{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center;width:100%}
.hero-badge{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--ts);border:1px solid #E3E7EE;border-radius:999px;padding:6px 18px;margin-bottom:24px;background:#fff}
.hero-badge i{width:7px;height:7px;border-radius:50%;background:var(--b)}
.hero-badge.wood i{background:var(--w)}
.hero-title{font-size:48px;font-weight:800;line-height:1.22;letter-spacing:1px}
.hero-title .grd{background:linear-gradient(90deg,var(--b) 0%,#4A7DE0 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-title .grd-w{background:linear-gradient(90deg,var(--w) 0%,#D4A06A 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-desc{margin:24px 0 40px;font-size:18px;color:var(--ts);max-width:500px;line-height:1.85}
.hero-cta{display:flex;gap:16px;flex-wrap:wrap}
.hero-visual{display:flex;align-items:center;justify-content:center}
.hero-visual svg{width:100%;max-width:440px;height:auto}
.scroll-hint{position:absolute;bottom:32px;left:50%;transform:translateX(-50%);display:flex;flex-direction:column;align-items:center;gap:8px;color:var(--ts);font-size:12px;letter-spacing:3px}
.mouse{width:26px;height:40px;border:2px solid #B7C0CB;border-radius:14px;display:flex;justify-content:center;padding-top:7px}
.mouse span{width:4px;height:8px;border-radius:2px;background:var(--b);animation:whl 1.8s ease-in-out infinite}
@keyframes whl{0%,100%{transform:translateY(0);opacity:1}50%{transform:translateY(13px);opacity:.2}}

/* cases */
.cases{padding:120px 0;position:relative}
.case-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}
.case-card{border-radius:var(--rc);overflow:hidden;box-shadow:var(--sh);transition:transform .4s cubic-bezier(.25,.8,.25,1),box-shadow .4s}
.case-card:hover{transform:translateY(-6px);box-shadow:var(--shh)}
.case-thumb{height:200px;display:flex;flex-direction:column;align-items:center;justify-content:center;font-size:14px;letter-spacing:2px;color:rgba(255,255,255,.85)}
.case-thumb svg{width:48px;height:48px;opacity:.55;margin-bottom:10px}
.case-body{padding:28px;background:#fff}
.case-body h3{font-size:19px;margin-bottom:6px}
.case-body .tags{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:14px}
.case-body .tags span{font-size:12px;color:var(--b);background:rgba(37,99,235,.08);padding:3px 12px;border-radius:999px}
.case-body .tags.wood span{color:var(--w);background:rgba(198,134,66,.08)}
.case-body p{font-size:14px;color:var(--ts);line-height:1.8}

/* process */
.process{background:var(--bg-alt);padding:120px 0;position:relative}
.process-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;position:relative;z-index:1}
.process-steps::before{content:"";position:absolute;top:42px;left:12%;right:12%;height:2px;background:linear-gradient(90deg,transparent,var(--b),transparent);opacity:.18;z-index:0}
.process-step{text-align:center;position:relative;z-index:1}
.step-num{width:84px;height:84px;border-radius:50%;background:#fff;border:2px solid var(--b);color:var(--b);font-size:28px;font-weight:700;display:flex;align-items:center;justify-content:center;margin:0 auto 20px;transition:background .4s,color .4s,transform .4s cubic-bezier(.25,.8,.25,1),box-shadow .4s}
.process-step:hover .step-num{background:linear-gradient(135deg,var(--b),var(--bd));color:#fff;transform:translateY(-6px);box-shadow:0 12px 28px rgba(37,99,235,.25)}
.step-num.wood{border-color:var(--w);color:var(--w)}
.process-step:hover .step-num.wood{background:linear-gradient(135deg,var(--w),var(--wd));color:#fff;box-shadow:0 12px 28px rgba(198,134,66,.25)}
.process-step h3{font-size:19px;margin-bottom:10px}
.process-step p{font-size:14px;color:var(--ts);max-width:240px;margin:0 auto}

/* pricing */
.pricing{padding:120px 0;position:relative;overflow:hidden}
.pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.pricing-card{background:#fff;border:1px solid #EEF1F5;border-radius:var(--rc);padding:40px 32px;text-align:center;box-shadow:var(--sh);position:relative;transition:transform .4s cubic-bezier(.25,.8,.25,1),box-shadow .4s}
.pricing-card:hover{transform:translateY(-6px);box-shadow:var(--shh)}
.pricing-card.ft{border-color:var(--b);box-shadow:0 8px 40px rgba(37,99,235,.1);transform:scale(1.03)}
.pricing-card.ft:hover{transform:scale(1.03) translateY(-6px)}
.pricing-card.ft::before{content:"推荐";position:absolute;top:16px;right:16px;background:linear-gradient(135deg,var(--b),var(--bd));color:#fff;font-size:12px;padding:4px 14px;border-radius:999px;letter-spacing:1px}
.pricing-card .pi{width:52px;height:52px;border-radius:12px;background:linear-gradient(135deg,rgba(37,99,235,.1),rgba(30,64,175,.06));display:flex;align-items:center;justify-content:center;margin:0 auto 20px}
.pricing-card .pi svg{width:24px;height:24px;stroke:var(--b)}
.pricing-card h3{font-size:22px;margin-bottom:6px}
.pricing-card .pd{font-size:14px;color:var(--ts);margin-bottom:18px}
.pricing-card .pp{font-size:36px;font-weight:800;color:var(--b);margin-bottom:4px}
.pricing-card .pp sub{font-size:15px;font-weight:500;color:var(--ts)}
.pricing-card .pn{font-size:13px;color:var(--ts);margin-bottom:26px}
.pricing-card ul{list-style:none;text-align:left;margin-bottom:28px}
.pricing-card ul li{font-size:14px;padding:8px 0;color:var(--ts);display:flex;align-items:flex-start;gap:10px}
.pricing-card ul li::before{content:"✓";color:var(--b);font-weight:700;flex-shrink:0}
.pricing-bottom{text-align:center;margin-top:48px}
.pricing-bottom p{font-size:15px;color:var(--ts);max-width:600px;margin:0 auto}

/* contact */
.contact{background:#0D1525;padding:100px 0 24px;position:relative;overflow:hidden;color:#fff}
.contact .bg-grid{opacity:.08}
.contact .bg-grid::before{background-image:linear-gradient(rgba(37,99,235,.3) 1px,transparent 1px),linear-gradient(90deg,rgba(37,99,235,.3) 1px,transparent 1px);background-size:50px 50px}
.contact-rng{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);pointer-events:none}
.contact-orb{position:absolute;left:50%;top:50%;border-radius:50%;border:1px solid;transform:translate(-50%,-50%)}
.contact-orb:nth-child(1){width:200px;height:200px;border-color:rgba(37,99,235,.15);animation:os 20s linear infinite}
.contact-orb:nth-child(2){width:340px;height:340px;border-color:rgba(37,99,235,.1);animation:os 28s linear infinite reverse}
.contact-orb:nth-child(3){width:500px;height:500px;border-color:rgba(37,99,235,.08);animation:os 36s linear infinite}
.contact-orb-d{position:absolute;width:6px;height:6px;border-radius:50%;background:var(--b);box-shadow:0 0 12px var(--b),0 0 24px rgba(37,99,235,.5);top:-3px;left:50%;transform:translateX(-50%)}
@keyframes os{from{transform:translate(-50%,-50%) rotate(0deg)}to{transform:translate(-50%,-50%) rotate(360deg)}}
.contact .sec-head{margin-bottom:64px;position:relative;z-index:1}
.contact .sec-tag{color:rgba(255,255,255,.55)}
.contact .sec-tag::before,.contact .sec-tag::after{background:linear-gradient(90deg,transparent,rgba(37,99,235,.5))}
.contact .sec-title{color:#fff}.contact .sec-sub{color:rgba(255,255,255,.55)}
.contact-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:64px;position:relative;z-index:1;align-items:start}
.contact-cds{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.contact-cd{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);border-radius:var(--rc);padding:28px 24px;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
.contact-cdicon{width:44px;height:44px;border-radius:10px;background:rgba(37,99,235,.15);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.contact-cdicon svg{width:20px;height:20px;stroke:var(--b)}
.contact-cd h4{font-size:16px;font-weight:600;margin-bottom:8px;color:#fff}
.contact-cd p{font-size:13px;color:rgba(255,255,255,.55);line-height:1.7}
.contact-cd p a{color:inherit;border-bottom:1px solid rgba(255,255,255,.2);transition:border-color .3s}
.contact-cd p a:hover{border-color:rgba(37,99,235,.6)}
.contact-act{background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.06);border-radius:var(--rc);padding:44px 36px;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);text-align:center}
.contact-act h4{font-size:20px;font-weight:700;margin-bottom:10px}
.contact-act p{font-size:14px;color:rgba(255,255,255,.5);margin-bottom:32px}
.contact-act .qrc{width:140px;height:140px;margin:0 auto 16px;background:rgba(255,255,255,.06);border:2px dashed rgba(255,255,255,.15);border-radius:12px;display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,.35);font-size:12px;letter-spacing:2px;overflow:hidden}
.contact-act .qrc img{width:100%;height:100%;object-fit:contain;border-radius:8px}
.contact-act .btn-ct{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border-radius:var(--rb);background:linear-gradient(135deg,var(--b),var(--bd));color:#fff;font-size:15px;font-weight:600;transition:transform .3s,box-shadow .3s}
.contact-act .btn-ct:hover{transform:translateY(-2px);box-shadow:0 8px 28px rgba(37,99,235,.4)}

/* footer */
.footer{background:#0D1525;color:#C6CDD6;padding:0}
.footer-inner{border-top:1px solid rgba(255,255,255,.08);padding:48px 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:48px;padding-bottom:40px}
.footer h4{color:#fff;font-size:17px;margin-bottom:20px;letter-spacing:1px}
.footer p{font-size:14px;margin-bottom:8px}
.footer-nav a{display:block;font-size:14px;margin-bottom:14px;color:#C6CDD6;transition:color .3s,transform .35s}
.footer-nav a:hover{color:#fff;transform:translateX(6px)}
.footer-note{font-size:12px;color:rgba(255,255,255,.4)}
.footer-bar{border-top:1px solid rgba(255,255,255,.08);padding:22px 0;text-align:center;font-size:13px;color:rgba(255,255,255,.4)}
.footer .logo-placeholder{width:72px;height:72px;border-radius:12px;overflow:hidden;margin-bottom:20px}
.footer .logo-placeholder img{width:100%;height:100%;object-fit:cover}
.footer .qrc{width:112px;height:112px;border-radius:12px;background:rgba(255,255,255,.06);border:2px dashed rgba(255,255,255,.2);display:flex;align-items:center;justify-content:center;font-size:12px;color:rgba(255,255,255,.45);letter-spacing:2px;margin-bottom:10px}

/* facts（公司速览：供搜索引擎与 AI 引用的实体信息） */
.facts{background:var(--bg-alt);padding:120px 0;position:relative}
.fact-list{display:grid;grid-template-columns:repeat(2,1fr);max-width:960px;margin:0 auto;background:#fff;border:1px solid #EEF1F5;border-radius:var(--rc);box-shadow:var(--sh);overflow:hidden}
.fact-item{display:grid;grid-template-columns:120px 1fr;gap:20px;padding:18px 28px;border-bottom:1px solid #F1F4F8}
.fact-item:nth-last-child(-n+2){border-bottom:none}
.fact-item dt{font-size:14px;font-weight:600;color:var(--b);letter-spacing:1px}
.fact-item dd{margin:0;font-size:15px;color:var(--ts);line-height:1.8}

/* faq（常见问题：GEO 重点，答案文本始终存在于 DOM） */
.faq{padding:120px 0;position:relative}
.faq-list{max-width:880px;margin:0 auto}
.faq-item{background:#fff;border:1px solid #EEF1F5;border-radius:var(--rc);margin-bottom:14px;box-shadow:var(--sh);transition:box-shadow .3s,border-color .3s}
.faq-item[open]{border-color:rgba(37,99,235,.28);box-shadow:var(--shh)}
.faq-item summary{cursor:pointer;list-style:none;padding:20px 60px 20px 26px;font-size:17px;font-weight:600;line-height:1.6;position:relative}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"";position:absolute;right:26px;top:50%;width:9px;height:9px;border-right:2px solid var(--b);border-bottom:2px solid var(--b);transform:translateY(-70%) rotate(45deg);transition:transform .3s}
.faq-item[open] summary::after{transform:translateY(-30%) rotate(225deg)}
.faq-answer{padding:0 26px 22px;border-top:1px solid #F1F4F8}
.faq-answer p{padding-top:16px;font-size:15px;color:var(--ts);line-height:1.9}
.faq[data-variant="wood"] .faq-item[open]{border-color:rgba(198,134,66,.32)}
.faq[data-variant="wood"] .faq-item summary::after{border-color:var(--w)}

/* rwd */
@media(max-width:1024px){.case-grid,.process-steps{grid-template-columns:repeat(2,1fr)}.pricing-grid{grid-template-columns:1fr;max-width:420px;margin:0 auto}.pricing-card.ft{transform:none}.pricing-card.ft:hover{transform:translateY(-6px)}}
@media(max-width:768px){
  .nav{padding:0 24px}
  .nav-links{position:fixed;top:var(--nh);left:0;right:0;background:rgba(255,255,255,.96);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);flex-direction:column;padding:24px 0;gap:0;transform:translateY(-110%);transition:transform .4s cubic-bezier(.25,.8,.25,1);box-shadow:0 8px 32px rgba(0,0,0,.08)}
  .nav-links.open{transform:translateY(0)}.nav-links a{font-size:17px;padding:16px 32px;display:block}.nav-mobile{display:block}
  .glow-c,.ring-c,.dot-c,.trail-c{display:none}
  .hero{padding:100px 0 90px}.hero-inner{grid-template-columns:1fr;gap:48px}
  .hero-title{font-size:34px}.hero-desc{font-size:16px}.hero-visual{display:none}
  .case-grid,.process-steps,.contact-cds{grid-template-columns:1fr}.process-steps::before{display:none}
  .contact-grid{grid-template-columns:1fr;gap:40px}.footer-grid{grid-template-columns:1fr;gap:40px}
  .sec-title{font-size:28px}.sec-tag::before,.sec-tag::after{width:16px}
  .cases,.process,.pricing,.contact,.facts,.faq{padding:80px 0}.contact{padding:80px 0 24px}
  .fact-list{grid-template-columns:1fr}.fact-item{grid-template-columns:1fr;gap:4px;padding:16px 22px}
  .fact-item:nth-last-child(-n+2){border-bottom:1px solid #F1F4F8}
  .fact-item:last-child{border-bottom:none}
  .faq-item summary{font-size:16px;padding:18px 52px 18px 20px}
  .faq-answer{padding:0 20px 18px}
}
@media(max-width:480px){.hero-cta{flex-direction:column}.hero-cta .btn{width:100%;justify-content:center}}