:root{
  --ink:#172238;
  --muted:#647086;
  --paper:#f7f9fc;
  --white:#fff;
  --line:#dfe6f0;
  --cyan:#00b8d9;
  --blue:#246bfe;
  --violet:#7357ed;
  --pink:#ef4c9b;
  --lime:#b4d334;
  --shadow:0 16px 42px rgba(31,65,115,.11);
  --radius:16px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.7}
img{max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
.container{width:min(1180px,calc(100% - 36px));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(14px)}
.navbar{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;min-width:150px}
.ai-page-logo{display:block;width:128px}
.nav-links{display:flex;align-items:center;gap:0;flex-wrap:wrap}
.nav-links a{font-size:13px;color:#4b5870;padding:8px 9px;transition:.2s}
.nav-links a:hover{color:var(--blue)}
.nav-action,.button{display:inline-flex;align-items:center;justify-content:center;border:0;cursor:pointer;font-weight:700;border-radius:9px;padding:11px 18px;transition:transform .2s,box-shadow .2s,background .2s}
.nav-action,.button-primary{color:#fff;background:var(--blue);box-shadow:0 9px 20px rgba(36,107,254,.22)}
.nav-action:hover,.button:hover{transform:translateY(-2px);box-shadow:0 12px 24px rgba(36,107,254,.25)}
.menu-toggle{display:none;background:#edf3ff;border:1px solid #dbe6fb;color:var(--blue);padding:8px 11px;border-radius:8px;font-size:20px}
.hero{position:relative;overflow:hidden;background:#eef5ff;border-bottom:1px solid #dce8f8}
.hero:before,.hero:after{content:"";position:absolute;border:1px solid rgba(0,184,217,.24);transform:rotate(24deg);pointer-events:none}
.hero:before{width:360px;height:360px;right:-100px;top:-170px;border-radius:50%}
.hero:after{width:230px;height:230px;left:-100px;bottom:-130px;border-radius:34%}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.1fr .9fr;gap:54px;align-items:center;padding:86px 0 70px}
.eyebrow{display:inline-flex;align-items:center;color:#1766d5;font-weight:700;font-size:13px;letter-spacing:1px;margin-bottom:14px}
.eyebrow:before{content:"";width:28px;height:3px;background:var(--pink);margin-right:9px}
h1,h2,h3,p{margin-top:0}
h1{font-size:clamp(36px,5vw,64px);line-height:1.12;letter-spacing:0;margin-bottom:22px;max-width:680px}
h2{font-size:clamp(27px,3.6vw,42px);line-height:1.2;margin-bottom:14px}
h3{font-size:19px;line-height:1.35;margin-bottom:9px}
.hero-copy{font-size:18px;color:#53647c;max-width:650px}
.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.button-secondary{background:#fff;color:var(--blue);border:1px solid #cbdcf9}
.hero-panel{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.metric{padding:22px;background:#fff;border:1px solid #d9e5f7;border-radius:14px;box-shadow:var(--shadow);animation:rise .7s both}
.metric:nth-child(2){margin-top:28px;animation-delay:.1s}
.metric:nth-child(3){animation-delay:.2s}
.metric:nth-child(4){margin-top:28px;animation-delay:.3s}
.metric strong{display:block;font-size:32px;color:var(--blue);line-height:1.1}
.metric span{display:block;color:var(--muted);font-size:13px;margin-top:5px}
.section{padding:82px 0}
.section-alt{background:#fff;border-top:1px solid #e6edf6;border-bottom:1px solid #e6edf6}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:32px}
.section-head p{max-width:610px;color:var(--muted);margin-bottom:0}
.intro-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px;align-items:start}
.intro-text{font-size:17px;color:#53647c}
.signal-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.signal{padding:17px 18px;background:#f7fbff;border-left:4px solid var(--cyan);border-radius:9px;color:#32435c}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:17px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:23px;box-shadow:0 7px 22px rgba(29,57,100,.05);transition:transform .24s,box-shadow .24s}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.service-card{position:relative;border-top:4px solid var(--blue)}
.service-card:nth-child(3n+2){border-top-color:var(--pink)}
.service-card:nth-child(3n){border-top-color:var(--lime)}
.card p{color:var(--muted);font-size:14px;margin-bottom:0}
.tag-list{display:flex;flex-wrap:wrap;gap:8px;margin-top:15px}
.tag{font-size:12px;color:#315172;background:#edf6ff;border:1px solid #d2e6fb;border-radius:30px;padding:4px 9px}
.process{display:grid;grid-template-columns:repeat(5,1fr);gap:0;border:1px solid var(--line);background:#fff;border-radius:16px;overflow:hidden}
.process-step{padding:23px 18px;border-right:1px solid var(--line);position:relative}
.process-step:last-child{border-right:0}
.process-step b{display:block;color:var(--pink);font-size:13px;margin-bottom:15px}
.process-step h3{font-size:17px}
.process-step p{font-size:13px;color:var(--muted);margin:0}
.solution-grid{display:grid;grid-template-columns:1fr 1.3fr;gap:26px;align-items:stretch}
.solution-lead{background:#162544;color:#fff;border-radius:16px;padding:34px}
.solution-lead p{color:#c8d6ed}
.solution-lead .tag{color:#d9f8ff;background:#24466b;border-color:#37678f}
.solution-items{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.solution-item{background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px}
.solution-item strong{display:block;margin-bottom:5px}
.solution-item span{color:var(--muted);font-size:13px}
.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.timeline-item{padding:22px 20px;background:#fff;border-top:3px solid var(--cyan);border-radius:12px;box-shadow:0 6px 18px rgba(40,70,120,.06)}
.timeline-item:nth-child(2){border-color:var(--violet)}.timeline-item:nth-child(3){border-color:var(--pink)}.timeline-item:nth-child(4){border-color:var(--lime)}
.timeline-item span{font-size:13px;color:var(--blue);font-weight:700}
.media-grid{display:grid;grid-template-columns:1.4fr .8fr .8fr;gap:16px}
.media-card{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden}
.media-card figure{margin:0;aspect-ratio:16/9;background:#edf3f9;overflow:hidden}
.media-card figure.square{aspect-ratio:1}
.media-card img{width:100%;height:100%;object-fit:cover;display:block}
.media-card .media-body{padding:17px}
.media-body p{color:var(--muted);font-size:14px;margin-bottom:0}
.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{text-align:left;padding:16px 18px;border-bottom:1px solid var(--line);font-size:14px}
.compare th{background:#eff5ff;color:#31537f}
.compare tr:last-child td{border-bottom:0}
.rating{display:flex;align-items:center;gap:18px;margin-bottom:22px}
.rating strong{font-size:40px;color:var(--pink);line-height:1}
.stars{color:#f6a900;letter-spacing:2px;font-size:21px}
.reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.review{background:#fff;border:1px solid var(--line);padding:21px;border-radius:13px}
.review p{font-size:14px;color:#4d5d73}
.reviewer{display:flex;align-items:center;gap:10px;font-size:13px;font-weight:700}
.avatar{width:34px;height:34px;display:grid;place-items:center;border-radius:50%;color:#fff;background:var(--blue)}
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.price-card{background:#fff;border:1px solid var(--line);padding:26px;border-radius:14px}
.price-card.featured{border:2px solid var(--pink);position:relative}
.price-card .price{font-size:30px;color:var(--blue);font-weight:700;margin:12px 0}
.price-card small,.price-card li{color:var(--muted);font-size:13px}
.price-card ul{padding-left:18px;margin-bottom:0}
.faq-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}
details{background:#fff;border:1px solid var(--line);border-radius:10px;padding:0 18px}
summary{cursor:pointer;list-style:none;padding:17px 0;font-weight:700}
summary::-webkit-details-marker{display:none}
summary:after{content:"+";float:right;color:var(--blue);font-size:20px}
details[open] summary:after{content:"−"}
details p{color:var(--muted);font-size:14px;padding:0 0 16px;margin:0}
.form-layout{display:grid;grid-template-columns:.75fr 1.25fr;gap:30px;align-items:start}
.contact-panel{background:#162544;color:#fff;border-radius:16px;padding:30px}
.contact-panel p{color:#c7d3e7}
.contact-info{border-top:1px solid #385074;padding-top:17px;margin-top:22px;color:#e6edf9;font-size:14px}
.qr{width:108px;border-radius:8px;background:#fff;padding:5px;margin-top:10px}
.form-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:28px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:7px}
.field.full{grid-column:1/-1}
label{font-size:13px;font-weight:700}
input,select,textarea{width:100%;border:1px solid #d5deea;border-radius:8px;padding:12px 13px;font:inherit;color:var(--ink);background:#fbfdff}
textarea{min-height:125px;resize:vertical}
.article-list{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.article{padding:17px;background:#fff;border:1px solid var(--line);border-radius:10px}
.article span{font-size:12px;color:var(--blue)}
.article h3{font-size:15px;margin:7px 0 0}
.link-cloud{display:flex;flex-wrap:wrap;gap:10px}
.link-cloud a{padding:9px 14px;background:#fff;border:1px solid var(--line);border-radius:7px;font-size:13px;color:#426184}
.cta{background:#e9f7ff;border-top:1px solid #cbeafa;border-bottom:1px solid #cbeafa;text-align:center}
.cta p{color:var(--muted)}
.footer{background:#142039;color:#dbe7f5;padding:38px 0 20px}
.footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:28px}
.footer h3{color:#fff;font-size:16px}
.footer p,.footer a{color:#b9c8dc;font-size:13px}
.footer-links{display:flex;flex-wrap:wrap;gap:7px 16px}
.footer-bottom{border-top:1px solid #31425f;margin-top:25px;padding-top:16px;color:#9fb0c8;font-size:12px}
.float-tools{position:fixed;right:18px;bottom:20px;z-index:15;display:flex;flex-direction:column;gap:9px}
.float-tools a{width:48px;height:48px;display:grid;place-items:center;border-radius:50%;background:var(--blue);color:#fff;box-shadow:0 8px 20px rgba(36,107,254,.28);font-size:13px;font-weight:700}
.float-tools a:last-child{background:var(--pink)}
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s,transform .6s}
.reveal.visible{opacity:1;transform:none}
@keyframes rise{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
@media(max-width:980px){
  .nav-links{display:none;position:absolute;top:72px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);padding:12px 18px;box-shadow:0 12px 25px rgba(20,40,80,.1)}
  .nav-links.open{display:grid;grid-template-columns:repeat(3,1fr)}
  .nav-links a{padding:9px 7px}
  .menu-toggle{display:block}
  .hero-grid,.intro-grid,.solution-grid,.form-layout{grid-template-columns:1fr}
  .hero-grid{padding-top:62px}
  .cards,.reviews{grid-template-columns:repeat(2,1fr)}
  .timeline{grid-template-columns:repeat(2,1fr)}
  .article-list{grid-template-columns:repeat(3,1fr)}
}
@media(max-width:620px){
  .container{width:min(100% - 28px,1180px)}
  .navbar{min-height:64px}.ai-page-logo{width:112px}.nav-action{display:none}
  .nav-links{top:64px}.nav-links.open{grid-template-columns:repeat(2,1fr)}
  .hero-grid{padding:55px 0 48px}.hero-copy{font-size:16px}h1{font-size:39px}
  .hero-panel{gap:9px}.metric{padding:17px}.metric strong{font-size:26px}
  .section{padding:58px 0}.section-head{display:block}.section-head p{margin-top:10px}
  .signal-list,.cards,.solution-items,.timeline,.reviews,.price-grid,.faq-list,.form-grid{grid-template-columns:1fr}
  .media-grid{grid-template-columns:1fr 1fr}.media-grid .media-card:first-child{grid-column:1/-1}
  .process{display:block}.process-step{border-right:0;border-bottom:1px solid var(--line)}.process-step:last-child{border-bottom:0}
  .article-list{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr}
  .form-card,.contact-panel{padding:21px}
}