:root{
  --ink:#172033;
  --muted:#5f6b7a;
  --line:#dfe7ed;
  --paper:#f7fbfc;
  --white:#fff;
  --cyan:#08b9ca;
  --blue:#1769e0;
  --orange:#ff8c32;
  --green:#18a673;
  --navy:#10294d;
  --shadow:0 16px 40px rgba(22,53,82,.10);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);background:var(--paper);font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;line-height:1.7}
img{max-width:100%;height:auto;display:block}
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,.94);border-bottom:1px solid rgba(223,231,237,.8);backdrop-filter:blur(14px)}
.navbar{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;min-width:160px}
.ai-page-logo{width:136px}
.nav-links{display:flex;align-items:center;justify-content:flex-end;gap:0;flex-wrap:wrap}
.nav-links a{font-size:14px;padding:8px 10px;color:#344258;transition:.25s}
.nav-links a:hover{color:var(--blue);background:#edf7fc}
.nav-cta,.primary-btn{background:var(--blue);color:#fff!important;border:0;border-radius:6px;padding:12px 20px!important;font-weight:700;box-shadow:0 8px 18px rgba(23,105,224,.22)}
.menu-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:5px;padding:8px 11px;font-size:20px;color:var(--navy)}
.hero{position:relative;overflow:hidden;background:linear-gradient(135deg,#eafcff 0%,#f8fbff 48%,#fff4e8 100%);border-bottom:1px solid #e6eef1}
.hero:before,.hero:after{content:"";position:absolute;border:1px solid rgba(8,185,202,.22);transform:rotate(24deg);pointer-events:none}
.hero:before{width:360px;height:360px;right:-120px;top:-120px;border-radius:32px}
.hero:after{width:240px;height:240px;left:-110px;bottom:-150px;border-radius:50%}
.hero-inner{position:relative;z-index:1;padding:94px 0 76px;display:grid;grid-template-columns:minmax(0,1.15fr) minmax(320px,.85fr);gap:64px;align-items:center}
.kicker{display:inline-flex;align-items:center;gap:9px;color:var(--blue);font-weight:800;font-size:14px;letter-spacing:1px}
.kicker:before{content:"";width:28px;height:3px;background:var(--orange);border-radius:2px}
h1,h2,h3,p{margin-top:0}
h1{font-size:clamp(36px,5vw,64px);line-height:1.13;letter-spacing:0;margin:18px 0 22px;max-width:700px}
.hero-copy{font-size:18px;color:#425168;max-width:670px}
.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.secondary-btn{display:inline-flex;align-items:center;justify-content:center;border:1px solid #a9c8d7;border-radius:6px;padding:11px 20px;color:var(--navy);background:#fff;font-weight:700;transition:.25s}
.secondary-btn:hover{border-color:var(--blue);color:var(--blue);transform:translateY(-2px)}
.hero-panel{background:#fff;border:1px solid rgba(23,105,224,.14);padding:24px;box-shadow:var(--shadow);border-radius:8px}
.panel-head{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);padding-bottom:15px;margin-bottom:18px}
.panel-head strong{font-size:18px}
.signal{display:inline-flex;align-items:center;gap:6px;color:var(--green);font-size:13px}
.signal i{width:8px;height:8px;background:var(--green);border-radius:50%;display:inline-block}
.metric-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.metric{padding:16px;background:#f3f9fb;border-left:3px solid var(--cyan)}
.metric b{display:block;font-size:25px;line-height:1.2;color:var(--navy)}
.metric span{font-size:13px;color:var(--muted)}
.section{padding:88px 0}
.section.alt{background:#fff}
.section-heading{max-width:760px;margin-bottom:38px}
.section-heading.center{margin-left:auto;margin-right:auto;text-align:center}
.section-heading h2{font-size:clamp(28px,4vw,43px);line-height:1.2;margin:12px 0}
.section-heading p{color:var(--muted);font-size:16px}
.eyebrow{font-size:13px;color:var(--blue);font-weight:800;letter-spacing:1.5px}
.intro-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:38px;align-items:start}
.intro-copy{font-size:18px;color:#3e4d61}
.highlight-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.highlight{background:#fff;border:1px solid var(--line);padding:19px;border-radius:6px}
.highlight strong{display:block;margin-bottom:5px;color:var(--navy)}
.highlight span{font-size:14px;color:var(--muted)}
.service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.service-card{padding:23px;background:#fff;border:1px solid var(--line);border-top:3px solid var(--cyan);transition:.25s}
.service-card:hover,.review:hover,.case-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.service-card h3{font-size:18px;margin:10px 0 7px}
.service-card p{font-size:14px;color:var(--muted);margin:0}
.icon-box{width:42px;height:42px;display:grid;place-items:center;background:#e8faff;color:var(--blue);font-size:21px;font-weight:800;border-radius:5px}
.flow{display:grid;grid-template-columns:repeat(5,1fr);gap:0;border-top:1px solid var(--line)}
.flow-step{position:relative;padding:27px 18px 10px;border-right:1px solid var(--line)}
.flow-step:last-child{border-right:0}
.flow-step b{display:block;color:var(--orange);font-size:14px;margin-bottom:8px}
.flow-step h3{font-size:17px;margin-bottom:7px}
.flow-step p{font-size:14px;color:var(--muted);margin:0}
.solution-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.solution{padding:25px;background:#f4fafc;border:1px solid #d6eaf0}
.solution h3{margin-bottom:8px}
.solution p{font-size:14px;color:var(--muted);margin:0}
.network{display:flex;flex-wrap:wrap;gap:10px;padding:24px;background:#fff;border:1px solid var(--line)}
.tag{padding:7px 13px;border:1px solid #c8dfe8;color:#35556b;background:#f7fcfd;border-radius:3px;font-size:14px}
.compare-wrap{display:grid;grid-template-columns:260px 1fr;gap:28px;align-items:start}
.score-box{background:var(--navy);color:#fff;padding:27px;border-radius:7px}
.score-box .stars{color:#ffd15c;font-size:24px;letter-spacing:2px}
.score-box strong{font-size:42px;display:block;line-height:1.25;margin:7px 0}
.score-box span{color:#c8d8e8;font-size:14px}
.table-scroll{overflow-x:auto;background:#fff;border:1px solid var(--line)}
table{width:100%;min-width:700px;border-collapse:collapse}
th,td{text-align:left;padding:15px 18px;border-bottom:1px solid var(--line);font-size:14px}
th{background:#edf8fb;color:var(--navy)}
td:first-child{font-weight:700;color:#263d55}
.good{color:var(--green);font-weight:700}
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.case-card{background:#fff;border:1px solid var(--line);overflow:hidden;transition:.25s}
.case-image{aspect-ratio:16/9;background:#eaf3f6;overflow:hidden}
.case-image img{width:100%;height:100%;object-fit:cover}
.case-body{padding:20px}
.case-body h3{font-size:18px;margin-bottom:7px}
.case-body p{font-size:14px;color:var(--muted);margin:0}
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.review{background:#fff;border:1px solid var(--line);padding:23px;transition:.25s}
.review p{font-size:15px;color:#405064;min-height:84px}
.reviewer{display:flex;align-items:center;gap:11px;border-top:1px solid var(--line);padding-top:14px}
.avatar{width:35px;height:35px;display:grid;place-items:center;background:#e5f8f5;color:var(--green);font-weight:800;border-radius:50%}
.reviewer small{display:block;color:var(--muted)}
.price-layout{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.price-panel{padding:28px;background:#fff;border:1px solid var(--line)}
.price-panel h3{margin-bottom:10px}
.price-panel p{font-size:14px;color:var(--muted)}
.price-list{margin:18px 0 0;padding:0;list-style:none}
.price-list li{display:flex;justify-content:space-between;border-bottom:1px solid var(--line);padding:11px 0;font-size:14px}
.price-list b{color:var(--blue)}
.article-list{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.article-list a{background:#fff;border:1px solid var(--line);padding:15px;font-size:14px;color:#334b67;min-height:74px;transition:.2s}
.article-list a:hover{border-color:var(--cyan);color:var(--blue)}
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px 28px}
details{background:#fff;border:1px solid var(--line);padding:17px 19px}
summary{cursor:pointer;font-weight:700;color:var(--navy);padding-right:20px}
details p{font-size:14px;color:var(--muted);margin:12px 0 0}
.form-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:38px;align-items:start}
.contact-info{padding:7px 0}
.contact-item{padding:17px 0;border-bottom:1px solid var(--line)}
.contact-item strong{display:block;color:var(--navy);margin-bottom:4px}
.contact-item span{font-size:14px;color:var(--muted)}
form{background:#fff;border:1px solid var(--line);padding:27px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:6px}
.field.full{grid-column:1/-1}
label{font-size:14px;font-weight:700;color:#31445b}
input,select,textarea{font:inherit;border:1px solid #cbd9e1;border-radius:4px;padding:11px 12px;color:var(--ink);background:#fcfeff;outline:0}
textarea{min-height:125px;resize:vertical}
input:focus,select:focus,textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(23,105,224,.1)}
.submit-btn{cursor:pointer;border:0;border-radius:5px;padding:12px 24px;background:var(--orange);color:#fff;font-weight:800;transition:.2s}
.submit-btn:hover{background:#e77720;transform:translateY(-2px)}
.kefu{display:flex;gap:18px;align-items:center;background:#f2fafb;padding:18px;margin-top:20px}
.kefu img{width:92px}
.footer{background:#10294d;color:#dbe8f2;padding:48px 0 24px}
.footer-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:36px}
.footer h3{color:#fff;font-size:18px;margin-bottom:13px}
.footer p,.footer a{font-size:14px;color:#b9cede}
.footer a:hover{color:#fff}
.footer-links{display:flex;flex-wrap:wrap;gap:9px 17px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.15);margin-top:30px;padding-top:18px;font-size:13px;color:#9fb5c8}
.float-actions{position:fixed;right:20px;bottom:22px;z-index:15;display:flex;flex-direction:column;gap:9px}
.float-actions a{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;background:var(--blue);color:#fff;font-weight:800;box-shadow:0 8px 22px rgba(20,70,130,.24)}
.reveal{opacity:0;transform:translateY(18px);transition:opacity .65s ease,transform .65s ease}
.reveal.visible{opacity:1;transform:none}
@media(max-width:1050px){
  .nav-links a{padding-left:6px;padding-right:6px;font-size:13px}
  .service-grid{grid-template-columns:repeat(2,1fr)}
  .article-list{grid-template-columns:repeat(3,1fr)}
}
@media(max-width:780px){
  .container{width:min(100% - 28px,620px)}
  .navbar{min-height:66px}
  .menu-toggle{display:block}
  .nav-links{display:none;position:absolute;top:66px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);padding:10px 14px;box-shadow:0 12px 22px rgba(20,50,70,.08)}
  .nav-links.open{display:flex;flex-direction:column;align-items:stretch}
  .nav-links a{padding:10px 7px;border-bottom:1px solid #eef2f4}
  .nav-cta{margin-top:7px;text-align:center}
  .hero-inner,.intro-grid,.compare-wrap,.price-layout,.form-layout{grid-template-columns:1fr;gap:28px}
  .hero-inner{padding:67px 0 55px}
  h1{font-size:42px}
  .section{padding:63px 0}
  .flow{grid-template-columns:1fr;border-top:0}
  .flow-step{border-right:0;border-bottom:1px solid var(--line);padding:17px 0}
  .flow-step:last-child{border-bottom:0}
  .solution-grid,.case-grid,.review-grid{grid-template-columns:1fr 1fr}
  .faq-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:22px}
}
@media(max-width:480px){
  .metric-grid,.highlight-list,.service-grid,.solution-grid,.case-grid,.review-grid,.article-list,.form-grid{grid-template-columns:1fr}
  .field.full{grid-column:auto}
  h1{font-size:36px}
  .hero-copy{font-size:16px}
  .actions>*{width:100%;text-align:center}
  .score-box{text-align:center}
  .float-actions{right:12px;bottom:14px}
}