:root{
  --ink:#15233b;
  --muted:#607089;
  --line:#dfe8ee;
  --paper:#f7fbfa;
  --white:#fff;
  --cyan:#10b8c7;
  --cyan-dark:#087f91;
  --lime:#d7f36a;
  --orange:#ff9d42;
  --navy:#152c4d;
  --soft-cyan:#e3f8f8;
  --soft-orange:#fff2e4;
  --shadow:0 16px 40px rgba(21,44,77,.09);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.7}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
button,input,select,textarea{font:inherit}
.container{width:min(1180px,calc(100% - 40px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}
.navbar{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:22px}
.brand{display:flex;align-items:center;flex:0 0 auto}
.ai-page-logo{width:142px}
.nav-links{display:flex;align-items:center;justify-content:flex-end;gap:0;flex-wrap:wrap}
.nav-links a{font-size:13px;color:var(--ink);padding:8px 10px;border-radius:7px;transition:.25s}
.nav-links a:hover,.nav-links a.active{background:var(--soft-cyan);color:var(--cyan-dark)}
.nav-cta,.primary-btn{background:var(--cyan);color:#fff;border:0;border-radius:7px;padding:12px 19px;font-weight:700;display:inline-flex;align-items:center;justify-content:center;gap:8px;transition:.25s;cursor:pointer}
.nav-cta:hover,.primary-btn:hover{background:var(--cyan-dark);transform:translateY(-2px);box-shadow:0 8px 18px rgba(16,184,199,.23)}
.menu-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:7px;padding:9px 11px;color:var(--ink)}
.hero{position:relative;overflow:hidden;background:var(--navy);color:#fff;padding:88px 0 74px}
.hero:before,.hero:after{content:"";position:absolute;border:1px solid rgba(215,243,106,.45);transform:rotate(35deg);pointer-events:none}
.hero:before{width:280px;height:280px;right:-90px;top:-100px}
.hero:after{width:130px;height:130px;left:7%;bottom:-70px;border-color:rgba(16,184,199,.65)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(320px,.85fr);gap:70px;align-items:center;position:relative;z-index:1}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--lime);font-size:14px;font-weight:700;letter-spacing:1px}
.eyebrow:before{content:"";width:26px;height:2px;background:var(--lime)}
.hero h1{font-size:clamp(38px,5vw,68px);line-height:1.15;margin:18px 0 22px;letter-spacing:0}
.hero p{font-size:18px;color:#d7e6ee;max-width:650px;margin:0 0 30px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.hero .primary-btn{background:var(--lime);color:var(--navy)}
.hero .primary-btn:hover{background:#e6ff8f}
.ghost-btn{display:inline-flex;align-items:center;justify-content:center;border:1px solid rgba(255,255,255,.45);color:#fff;border-radius:7px;padding:11px 18px;font-weight:700;transition:.25s}
.ghost-btn:hover{background:#fff;color:var(--navy)}
.hero-panel{border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.08);padding:24px;border-radius:12px}
.panel-title{font-size:14px;color:var(--lime);margin:0 0 18px;font-weight:700}
.signal{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.signal-item{border-left:3px solid var(--orange);padding:10px 12px;background:rgba(255,255,255,.08)}
.signal-item strong{display:block;font-size:25px;color:#fff;line-height:1.2}
.signal-item span{font-size:12px;color:#c6d8e0}
section{padding:82px 0}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:34px}
.section-head h2{font-size:clamp(28px,4vw,42px);line-height:1.2;margin:8px 0 0}
.section-head p{max-width:570px;color:var(--muted);margin:0}
.section-kicker{font-size:13px;color:var(--cyan-dark);font-weight:800;letter-spacing:1px}
.stats{padding:30px 0;background:#fff;border-bottom:1px solid var(--line)}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.stat{padding:10px 26px;border-right:1px solid var(--line)}
.stat:first-child{padding-left:0}.stat:last-child{border:0}
.stat strong{font-size:31px;color:var(--cyan-dark);display:block}
.stat span{font-size:13px;color:var(--muted)}
.intro{background:#fff}
.intro-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:72px;align-items:start}
.intro-copy h2{font-size:38px;line-height:1.25;margin:8px 0 18px}
.intro-copy p{color:var(--muted)}
.accent-line{width:74px;height:5px;background:var(--orange);margin:22px 0}
.feature-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.feature{padding:22px;border:1px solid var(--line);background:var(--paper);border-radius:8px;transition:.25s}
.feature:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#9bdde0}
.feature b{display:block;margin-bottom:7px;font-size:17px}
.feature span{font-size:14px;color:var(--muted)}
.service-section{background:#edf9f6}
.service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.service-card{background:#fff;border-top:4px solid var(--cyan);padding:24px;border-radius:8px;box-shadow:0 8px 22px rgba(21,44,77,.05);transition:.25s}
.service-card:nth-child(3n+2){border-top-color:var(--orange)}
.service-card:nth-child(3n){border-top-color:var(--lime)}
.service-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.service-card h3{margin:0 0 9px;font-size:19px}
.service-card p{margin:0;color:var(--muted);font-size:14px}
.service-tag{display:inline-block;color:var(--cyan-dark);font-size:12px;background:var(--soft-cyan);padding:3px 8px;margin-bottom:12px;border-radius:4px}
.process{background:#fff}
.process-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.step{position:relative;padding:22px 17px;border:1px solid var(--line);background:#fbfdfd;border-radius:8px}
.step-number{font-size:30px;color:var(--orange);font-weight:800;line-height:1}
.step h3{font-size:17px;margin:13px 0 6px}
.step p{font-size:13px;color:var(--muted);margin:0}
.solutions{background:#f5f8ff}
.solution-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.solution{padding:28px;background:#fff;border-left:5px solid var(--cyan);box-shadow:0 8px 22px rgba(21,44,77,.05)}
.solution:nth-child(2){border-color:var(--orange)}
.solution:nth-child(3){border-color:var(--lime)}
.solution:nth-child(4){border-color:#9b8cf3}
.solution h3{margin:0 0 9px}
.solution p{margin:0;color:var(--muted);font-size:14px}
.network{background:var(--navy);color:#fff}
.network .section-head p{color:#c8d7df}
.network .section-kicker{color:var(--lime)}
.network h2{color:#fff}
.tag-cloud{display:flex;gap:10px;flex-wrap:wrap}
.tag{padding:9px 14px;border:1px solid rgba(255,255,255,.23);border-radius:5px;color:#eaf5f7;background:rgba(255,255,255,.06);font-size:14px;transition:.25s}
.tag:hover{background:var(--lime);color:var(--navy);border-color:var(--lime)}
.network-note{margin-top:22px;color:#c8d7df;font-size:14px}
.compare{background:#fff}
.rating-band{display:flex;align-items:center;justify-content:space-between;gap:25px;padding:24px 28px;background:var(--soft-orange);border-left:5px solid var(--orange);margin-bottom:24px}
.rating-score strong{font-size:42px;color:var(--navy);line-height:1}
.stars{color:#e98421;letter-spacing:3px;font-size:21px}
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:8px}
.compare-table{width:100%;border-collapse:collapse;min-width:700px;background:#fff}
.compare-table th,.compare-table td{padding:16px 18px;text-align:left;border-bottom:1px solid var(--line);font-size:14px}
.compare-table th{background:#e9f8f6;color:var(--navy)}
.compare-table td:nth-child(2){color:var(--cyan-dark);font-weight:700}
.compare-table tr:last-child td{border-bottom:0}
.cases{background:#f4fbfa}
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.case-card{background:#fff;border-radius:8px;overflow:hidden;border:1px solid var(--line);transition:.25s}
.case-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.case-image{aspect-ratio:16/9;overflow:hidden;background:#e9f3f2}
.case-image img{width:100%;height:100%;object-fit:cover}
.case-content{padding:20px}
.case-content h3{margin:0 0 7px}
.case-content p{font-size:14px;color:var(--muted);margin:0}
.case-link{display:inline-block;color:var(--cyan-dark);font-size:13px;font-weight:700;margin-top:13px}
.reviews{background:#fff}
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.review{padding:23px;border:1px solid var(--line);border-radius:8px;background:#fff}
.review p{margin:0 0 18px;color:#40536b;font-size:14px}
.review footer{display:flex;align-items:center;justify-content:space-between;color:var(--muted);font-size:13px}
.review b{color:var(--ink)}
.pricing{background:#fff6eb}
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.price-card{background:#fff;border:1px solid #f0d5b7;padding:25px;border-radius:8px}
.price-card.featured{border:2px solid var(--orange);transform:translateY(-8px)}
.price-card h3{margin:0 0 12px}
.price-card strong{font-size:27px;color:#df741d}
.price-card p{font-size:14px;color:var(--muted);margin:12px 0 0}
.request{background:#eaf9f6}
.request-grid{display:grid;grid-template-columns:.75fr 1.25fr;gap:60px;align-items:start}
.request-copy h2{font-size:37px;line-height:1.25;margin:7px 0 15px}
.request-copy p{color:var(--muted)}
.contact-points{display:grid;gap:12px;margin-top:24px}
.contact-point{display:flex;gap:12px;align-items:center}
.contact-point i{font-style:normal;color:var(--cyan-dark);font-weight:800}
.form-box{background:#fff;padding:28px;border-radius:8px;box-shadow:var(--shadow)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-field{display:grid;gap:6px}
.form-field.full{grid-column:1/-1}
.form-field label{font-size:13px;font-weight:700}
.form-field input,.form-field select,.form-field textarea{width:100%;border:1px solid #cad9df;border-radius:5px;padding:11px 12px;color:var(--ink);background:#fff;outline:0}
.form-field textarea{min-height:120px;resize:vertical}
.form-field input:focus,.form-field select:focus,.form-field textarea:focus{border-color:var(--cyan);box-shadow:0 0 0 3px rgba(16,184,199,.12)}
.faq{background:#fff}
.faq-grid{max-width:900px;margin:auto}
details{border-bottom:1px solid var(--line);padding:18px 0}
summary{cursor:pointer;font-weight:700;list-style:none;display:flex;justify-content:space-between;gap:20px}
summary::-webkit-details-marker{display:none}
summary:after{content:"+";color:var(--cyan-dark);font-size:22px;line-height:1}
details[open] summary:after{content:"−"}
details p{color:var(--muted);font-size:14px;margin:12px 30px 0 0}
.articles{background:#f5f8ff}
.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.article{background:#fff;padding:22px;border:1px solid var(--line);border-radius:8px}
.article small{color:var(--cyan-dark);font-weight:700}
.article h3{font-size:18px;line-height:1.45;margin:10px 0}
.article p{color:var(--muted);font-size:14px;margin:0 0 12px}
.article a{color:var(--cyan-dark);font-weight:700;font-size:13px}
.footer{background:#10243d;color:#dce8ec;padding:54px 0 24px}
.footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr 1fr;gap:35px}
.footer h3{color:#fff;font-size:16px;margin:0 0 14px}
.footer p,.footer a{font-size:13px;color:#b9cad2}
.footer a{display:block;margin:6px 0}
.footer a:hover{color:var(--lime)}
.footer-logo{width:142px;margin-bottom:15px;filter:brightness(0) invert(1)}
.qr{width:108px;border-radius:5px;background:#fff;padding:5px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.14);margin-top:35px;padding-top:18px;display:flex;justify-content:space-between;gap:20px;font-size:12px;color:#99afb9}
.float-contact{position:fixed;right:20px;bottom:20px;z-index:15}
.float-contact a{display:flex;align-items:center;gap:8px;background:var(--orange);color:#fff;padding:12px 15px;border-radius:6px;box-shadow:0 8px 22px rgba(223,116,29,.3);font-weight:700;font-size:13px}
.to-top{position:fixed;right:20px;bottom:78px;z-index:14;border:0;background:var(--navy);color:#fff;width:38px;height:38px;border-radius:50%;cursor:pointer;opacity:0;pointer-events:none;transition:.25s}
.to-top.show{opacity:1;pointer-events:auto}
.reveal{opacity:0;transform:translateY(18px);transition:opacity .65s ease,transform .65s ease}
.reveal.visible{opacity:1;transform:none}
@media(max-width:1000px){
  .nav-links a{padding:7px 6px;font-size:12px}
  .nav-cta{padding:10px 13px;font-size:12px}
  .hero-grid,.intro-grid,.request-grid{gap:35px}
  .process-grid{grid-template-columns:repeat(3,1fr)}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:760px){
  .container{width:min(100% - 28px,1180px)}
  .navbar{min-height:64px}
  .menu-toggle{display:block}
  .nav-links{display:none;position:absolute;left:14px;right:14px;top:70px;background:#fff;border:1px solid var(--line);padding:10px;box-shadow:var(--shadow);border-radius:8px;align-items:stretch}
  .nav-links.open{display:flex}
  .nav-links a{width:100%;padding:10px 12px}
  .nav-cta{display:none}
  .hero{padding:65px 0 55px}
  .hero-grid,.intro-grid,.request-grid{grid-template-columns:1fr}
  .hero h1{font-size:40px}
  .hero p{font-size:16px}
  section{padding:60px 0}
  .section-head{display:block}
  .section-head p{margin-top:14px}
  .stat-grid{grid-template-columns:repeat(2,1fr);gap:16px}
  .stat{padding:5px 12px;border-right:0;border-bottom:1px solid var(--line)}
  .stat:nth-child(odd){padding-left:0}
  .stat strong{font-size:27px}
  .feature-list,.solution-grid,.service-grid,.case-grid,.review-grid,.price-grid,.article-grid{grid-template-columns:1fr}
  .process-grid{grid-template-columns:1fr 1fr}
  .price-card.featured{transform:none}
  .form-grid{grid-template-columns:1fr}
  .form-field.full{grid-column:auto}
  .rating-band{display:block}
  .rating-score{margin-top:12px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:25px}
}
@media(max-width:480px){
  .ai-page-logo{width:124px}
  .hero h1{font-size:35px}
  .process-grid,.footer-grid{grid-template-columns:1fr}
  .float-contact{right:12px;bottom:12px}
  .to-top{right:12px;bottom:67px}
}