:root{
  --ink:#182028;
  --muted:#647078;
  --paper:#f7f8f3;
  --white:#fff;
  --lime:#c9ed55;
  --cyan:#9fe8e0;
  --coral:#ff8e78;
  --yellow:#ffd86b;
  --line:#dbe1d9;
  --navy:#213b52;
  --shadow:0 14px 35px rgba(24,32,40,.09);
  --radius:18px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,"Microsoft YaHei","PingFang SC",sans-serif;line-height:1.7}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
.container{width:min(1180px,calc(100% - 40px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:20;background:rgba(247,248,243,.94);border-bottom:1px solid var(--line);backdrop-filter:blur(14px)}
.header-inner{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:22px}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;white-space:nowrap}
.ai-page-logo{width:44px;height:44px;object-fit:contain}
.brand-name{font-size:18px;letter-spacing:0}
.nav-links{display:flex;align-items:center;gap:0}
.nav-links a{padding:8px 10px;font-size:13px;color:#45525a;white-space:nowrap}
.nav-links a:hover{color:var(--ink)}
.nav-cta,.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid var(--ink);border-radius:999px;padding:11px 18px;font-weight:700;cursor:pointer;transition:transform .2s,box-shadow .2s,background .2s}
.nav-cta{background:var(--ink);color:#fff;font-size:13px}
.button{background:var(--lime);color:var(--ink);box-shadow:4px 4px 0 var(--ink)}
.button.secondary{background:#fff;box-shadow:none}
.button:hover,.nav-cta:hover{transform:translateY(-2px);box-shadow:6px 7px 0 rgba(24,32,40,.16)}
.menu-toggle{display:none;background:none;border:1px solid var(--ink);border-radius:10px;padding:8px 10px;font-size:19px}
.hero{position:relative;overflow:hidden;padding:78px 0 62px;background:linear-gradient(135deg,#f7f8f3 0%,#eef5df 58%,#e5f3ed 100%)}
.hero:before,.hero:after{content:"";position:absolute;border:2px solid var(--ink);opacity:.12;transform:rotate(-13deg);pointer-events:none}
.hero:before{width:210px;height:72px;right:7%;top:55px;border-radius:45% 55% 40% 60%}
.hero:after{width:130px;height:48px;left:4%;bottom:32px;border-radius:52% 48% 65% 35%;transform:rotate(18deg)}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:60px;align-items:center;position:relative;z-index:1}
.kicker{display:inline-block;margin-bottom:16px;padding:5px 12px;background:var(--coral);border:1px solid var(--ink);border-radius:6px;font-size:13px;font-weight:800;transform:rotate(-2deg)}
h1,h2,h3,p{margin-top:0}
h1{max-width:680px;margin-bottom:20px;font-size:clamp(38px,6vw,72px);line-height:1.06;letter-spacing:0}
.hero-copy{max-width:620px;color:#49575e;font-size:18px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin:28px 0}
.hero-note{font-size:13px;color:var(--muted)}
.hero-panel{padding:25px;background:#fff;border:2px solid var(--ink);border-radius:24px;box-shadow:10px 10px 0 var(--cyan);transform:rotate(2deg);animation:floatPanel 5s ease-in-out infinite}
.panel-top{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:14px;margin-bottom:18px}
.panel-title{font-weight:800}
.live-dot{width:11px;height:11px;border-radius:50%;background:#67c86e;box-shadow:0 0 0 5px #e2f6df}
.mini-chart{display:grid;grid-template-columns:repeat(8,1fr);align-items:end;gap:7px;height:105px;padding:10px 0}
.mini-chart i{display:block;background:var(--navy);border-radius:5px 5px 2px 2px}
.mini-chart i:nth-child(1){height:35%}.mini-chart i:nth-child(2){height:60%}.mini-chart i:nth-child(3){height:42%}.mini-chart i:nth-child(4){height:82%}.mini-chart i:nth-child(5){height:56%}.mini-chart i:nth-child(6){height:94%}.mini-chart i:nth-child(7){height:70%}.mini-chart i:nth-child(8){height:100%}
.stat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.stat{padding:12px 0;border-top:1px solid var(--line)}
.stat strong{display:block;font-size:21px}
.stat span{font-size:12px;color:var(--muted)}
.section{padding:82px 0}
.section.alt{background:#eef4e9}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:30px}
.section-head h2{max-width:660px;margin:0;font-size:clamp(28px,4vw,46px);line-height:1.12}
.section-head p{max-width:520px;margin:0;color:var(--muted)}
.eyebrow{margin-bottom:10px;color:#5a7c2b;font-size:13px;font-weight:800;letter-spacing:1px;text-transform:uppercase}
.intro-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:22px;align-items:start}
.about-text{font-size:18px;color:#46535b}
.brush-box{padding:28px;background:var(--yellow);border:2px solid var(--ink);border-radius:8px 24px 14px 28px;box-shadow:7px 7px 0 var(--ink)}
.brush-box strong{display:block;font-size:25px;line-height:1.2;margin-bottom:10px}
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:30px}
.metric{padding:20px;background:#fff;border:1px solid var(--line);border-radius:14px}
.metric strong{font-size:30px;display:block}
.metric span{color:var(--muted);font-size:13px}
.service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}
.service-card{padding:21px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);transition:transform .25s,box-shadow .25s}
.service-card:hover,.review:hover,.case:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.service-card:nth-child(3n+1){border-top:5px solid var(--coral)}
.service-card:nth-child(3n+2){border-top:5px solid var(--cyan)}
.service-card:nth-child(3n){border-top:5px solid var(--yellow)}
.service-card h3{font-size:18px;margin-bottom:8px}
.service-card p{color:var(--muted);font-size:14px;margin-bottom:0}
.icon-mark{display:inline-flex;width:32px;height:32px;align-items:center;justify-content:center;background:var(--lime);border:1px solid var(--ink);border-radius:50%;font-weight:800;margin-bottom:14px}
.process{display:grid;grid-template-columns:repeat(5,1fr);gap:0;border-top:2px solid var(--ink)}
.step{padding:22px 16px 5px;border-right:1px solid var(--line);position:relative}
.step:last-child{border-right:0}
.step:before{content:"";position:absolute;top:-9px;left:16px;width:15px;height:15px;background:var(--coral);border:2px solid var(--ink);border-radius:50%}
.step b{display:block;font-size:14px;color:#688b2e;margin-bottom:9px}
.step h3{font-size:17px;margin-bottom:7px}
.step p{font-size:13px;color:var(--muted);margin:0}
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px;margin:20px 0 0}
.tag-cloud span{padding:8px 13px;border:1px solid var(--ink);border-radius:6px;background:#fff;font-size:13px}
.tag-cloud span:nth-child(3n){background:var(--coral)}.tag-cloud span:nth-child(3n+1){background:var(--cyan)}.tag-cloud span:nth-child(3n+2){background:var(--yellow)}
.solution-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.solution{padding:25px;border-left:5px solid var(--navy);background:#fff;border-radius:4px 18px 18px 4px}
.solution h3{margin-bottom:8px}.solution p{color:var(--muted);font-size:14px;margin-bottom:0}
.network{display:grid;grid-template-columns:1fr 1fr;gap:22px;align-items:stretch}
.network-list{display:grid;grid-template-columns:repeat(3,1fr);gap:9px}
.network-list span{padding:12px 9px;text-align:center;background:#fff;border:1px solid var(--line);border-radius:10px;font-size:13px}
.timeline{border-left:3px solid var(--coral);padding-left:25px}
.timeline-item{position:relative;padding:0 0 25px}
.timeline-item:before{content:"";position:absolute;left:-34px;top:8px;width:13px;height:13px;background:var(--yellow);border:2px solid var(--ink);border-radius:50%}
.timeline-item h3{margin-bottom:4px}.timeline-item p{margin:0;color:var(--muted);font-size:14px}
.table-wrap{overflow-x:auto;background:#fff;border:1px solid var(--line);border-radius:14px}
.compare{width:100%;min-width:760px;border-collapse:collapse}
.compare th,.compare td{padding:16px;border-bottom:1px solid var(--line);text-align:left;font-size:14px}
.compare th{background:var(--navy);color:#fff}.compare tr:last-child td{border-bottom:0}.compare td:first-child{font-weight:700}
.rating{display:flex;align-items:center;gap:18px;margin-bottom:20px}.rating strong{font-size:42px;color:#e9784c}.stars{color:#e9784c;font-size:23px;letter-spacing:2px}
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.price{padding:24px;background:#fff;border:1px solid var(--line);border-radius:16px}
.price.featured{background:var(--navy);color:#fff;transform:translateY(-10px)}
.price h3{margin-bottom:12px}.price strong{font-size:28px;display:block;margin-bottom:8px}.price p{font-size:13px;color:var(--muted)}.price.featured p{color:#d9e4e8}
.case-grid,.review-grid,.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.case{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;transition:transform .25s,box-shadow .25s}
.image-box{aspect-ratio:16/8;overflow:hidden;background:#e9eee7}
.image-box img{width:100%;height:100%;object-fit:cover}
.case-body{padding:18px}.case-body h3{margin-bottom:6px}.case-body p{color:var(--muted);font-size:14px;margin:0}
.review{padding:22px;background:#fff;border:1px solid var(--line);border-radius:15px;transition:transform .25s,box-shadow .25s}
.review p{color:#46535b;font-size:14px}.review footer{font-size:13px;font-weight:700;color:#5a7c2b}
.article{padding:20px;background:#fff;border:1px solid var(--line);border-radius:14px}
.article h3{font-size:17px}.article p{font-size:13px;color:var(--muted);margin-bottom:12px}.read{font-size:13px;font-weight:700;color:#557e28}
.faq-list{max-width:900px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--line)}
.faq-question{width:100%;display:flex;justify-content:space-between;align-items:center;padding:18px 0;background:none;border:0;text-align:left;font:inherit;font-weight:700;color:var(--ink);cursor:pointer}
.faq-question span:last-child{font-size:22px;transition:transform .2s}
.faq-answer{display:none;padding:0 40px 17px 0;color:var(--muted);font-size:14px}
.faq-item.open .faq-answer{display:block}.faq-item.open .faq-question span:last-child{transform:rotate(45deg)}
.form-layout{display:grid;grid-template-columns:.75fr 1.25fr;gap:30px;align-items:start}
.contact-copy{padding:25px;background:var(--coral);border:2px solid var(--ink);border-radius:25px 8px 25px 8px}
.contact-copy h2{font-size:34px;line-height:1.15}.contact-copy p{color:#3c4448}
.form-card{padding:26px;background:#fff;border:1px solid var(--line);border-radius:18px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}
.field{display:flex;flex-direction:column;gap:6px}.field.full{grid-column:1/-1}
.field label{font-size:13px;font-weight:700}.field input,.field select,.field textarea{width:100%;padding:12px 13px;border:1px solid #cdd5ce;border-radius:9px;background:#fbfcfa;color:var(--ink);font:inherit}.field textarea{min-height:120px;resize:vertical}
.contact-details{display:grid;gap:8px;margin-top:22px;font-size:14px}.qr{width:110px;margin-top:15px;border:5px solid #fff}
.footer{background:var(--navy);color:#eaf3ef;padding:45px 0 22px}.footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:28px}.footer h3{color:var(--lime);font-size:16px}.footer p,.footer a{color:#d1dce0;font-size:13px}.footer-links{display:flex;flex-wrap:wrap;gap:8px 15px}.copyright{border-top:1px solid rgba(255,255,255,.18);margin-top:30px;padding-top:17px;font-size:12px;color:#b8c8cd}
.floating{position:fixed;right:20px;bottom:20px;z-index:15}.float-button{display:flex;align-items:center;gap:8px;padding:12px 16px;background:var(--lime);border:2px solid var(--ink);border-radius:999px;font-weight:800;box-shadow:4px 4px 0 var(--ink);cursor:pointer}
.reveal{opacity:0;transform:translateY(18px);transition:opacity .65s,transform .65s}.reveal.visible{opacity:1;transform:none}
@keyframes floatPanel{0%,100%{transform:rotate(2deg) translateY(0)}50%{transform:rotate(2deg) translateY(-7px)}}
@media(max-width:980px){
  .nav-links{display:none;position:absolute;left:20px;right:20px;top:70px;padding:10px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
  .nav-links.show{display:flex}.nav-links a{padding:11px 14px}.menu-toggle{display:block}.nav-cta{display:none}
  .hero-grid,.intro-grid,.network,.form-layout{grid-template-columns:1fr}.hero-grid{gap:35px}.hero-panel{max-width:560px}
  .service-grid{grid-template-columns:repeat(2,1fr)}.process{grid-template-columns:repeat(3,1fr);gap:20px;border-top:0}.step{border-right:0;border-top:2px solid var(--ink)}
  .price-grid{grid-template-columns:repeat(3,1fr)}.footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:620px){
  .container{width:min(100% - 28px,1180px)}.header-inner{min-height:68px}.brand-name{font-size:16px}
  .hero{padding:55px 0 45px}h1{font-size:42px}.hero-copy{font-size:16px}.section{padding:58px 0}.section-head{display:block}.section-head p{margin-top:14px}
  .metrics,.service-grid,.solution-grid,.case-grid,.review-grid,.article-grid,.price-grid{grid-template-columns:1fr 1fr}
  .process{grid-template-columns:1fr 1fr}.network-list{grid-template-columns:repeat(2,1fr)}
  .price.featured{transform:none}.form-grid{grid-template-columns:1fr}.field.full{grid-column:auto}.footer-grid{grid-template-columns:1fr}.floating{right:14px;bottom:14px}
}
@media(max-width:420px){
  .metrics,.service-grid,.solution-grid,.case-grid,.review-grid,.article-grid,.price-grid{grid-template-columns:1fr}.hero-actions{align-items:stretch;flex-direction:column}.button{width:100%}.process{grid-template-columns:1fr}
}