:root{
  --ink:#172033;
  --muted:#667085;
  --line:#e6eaf0;
  --paper:#f8fafc;
  --white:#fff;
  --blue:#2764e8;
  --cyan:#16b8c4;
  --pink:#e9558d;
  --yellow:#f6bd3e;
  --violet:#7259db;
  --green:#28a879;
  --shadow:0 18px 50px rgba(34,55,96,.10);
  --radius:18px;
}
*{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}
.container{width:min(1180px,calc(100% - 40px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);border-bottom:1px solid rgba(230,234,240,.9);backdrop-filter:blur(14px)}
.navbar{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;min-width:150px}
.ai-page-logo{width:126px;max-height:46px;object-fit:contain}
.nav-links{display:flex;align-items:center;justify-content:flex-end;gap:0;flex-wrap:wrap}
.nav-links a{font-size:13px;color:#49556b;padding:10px 9px;transition:.25s}
.nav-links a:hover{color:var(--blue)}
.nav-action{display:inline-flex;align-items:center;justify-content:center;background:var(--ink);color:#fff!important;border-radius:9px;padding:10px 16px!important;font-weight:700!important;margin-left:8px}
.menu-toggle{display:none;border:0;background:#eef3ff;color:var(--blue);width:42px;height:40px;border-radius:9px;font-size:21px}
.hero{position:relative;overflow:hidden;background:linear-gradient(135deg,#f5f8ff 0%,#fff 45%,#fff9f1 100%);padding:86px 0 70px;border-bottom:1px solid #edf0f5}
.hero:before,.hero:after{content:"";position:absolute;border-radius:50%;pointer-events:none;filter:blur(2px)}
.hero:before{width:260px;height:260px;background:rgba(39,100,232,.12);right:-80px;top:30px}
.hero:after{width:210px;height:210px;background:rgba(233,85,141,.10);left:-80px;bottom:-110px}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:minmax(0,1.3fr) minmax(300px,.7fr);align-items:center;gap:64px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue);font-weight:800;font-size:14px;letter-spacing:1px}
.eyebrow:before{content:"";width:28px;height:3px;background:linear-gradient(90deg,var(--blue),var(--pink));border-radius:4px}
h1,h2,h3,p{margin-top:0}
h1{font-size:clamp(38px,5vw,68px);line-height:1.13;letter-spacing:0;margin:18px 0 22px;max-width:720px}
h2{font-size:clamp(28px,3vw,42px);line-height:1.2;margin-bottom:14px}
h3{font-size:20px;line-height:1.35;margin-bottom:9px}
.hero-copy{font-size:18px;color:#536077;max-width:680px}
.hero-buttons{display:flex;gap:12px;flex-wrap:wrap;margin:30px 0 30px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;border-radius:10px;padding:11px 20px;border:1px solid transparent;font-weight:800;transition:transform .25s,box-shadow .25s,background .25s}
.btn:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(39,100,232,.2)}
.btn-primary{background:var(--blue);color:#fff}
.btn-secondary{background:#fff;color:var(--ink);border-color:#dce3ef}
.btn-dark{background:var(--ink);color:#fff}
.hero-note{display:flex;align-items:center;gap:14px;color:#68758a;font-size:13px}
.hero-note strong{color:var(--green)}
.hero-panel{background:#fff;border:1px solid #e5eaf3;border-radius:24px;padding:26px;box-shadow:var(--shadow);position:relative}
.hero-panel:before{content:"";position:absolute;top:0;left:26px;right:26px;height:4px;background:linear-gradient(90deg,var(--blue),var(--cyan),var(--yellow),var(--pink));border-radius:0 0 5px 5px}
.panel-title{font-weight:800;font-size:17px;margin-bottom:20px}
.signal{display:flex;align-items:center;justify-content:space-between;padding:14px 0;border-bottom:1px solid var(--line)}
.signal:last-child{border-bottom:0}
.signal-label{color:var(--muted);font-size:14px}
.signal-value{font-weight:800;color:var(--blue)}
.signal-bar{height:7px;background:#edf1f7;border-radius:10px;margin-top:7px;overflow:hidden}
.signal-bar span{display:block;height:100%;background:linear-gradient(90deg,var(--cyan),var(--blue));border-radius:inherit}
.section{padding:92px 0}
.section-white{background:#fff}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:25px;margin-bottom:34px}
.section-head p{color:var(--muted);max-width:580px;margin-bottom:0}
.kicker{font-size:13px;font-weight:800;color:var(--pink);letter-spacing:1.5px;text-transform:uppercase;margin-bottom:10px}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:-1px}
.stat{padding:24px;background:#fff;border:1px solid var(--line);border-top:4px solid var(--blue);border-radius:0 0 14px 14px}
.stat:nth-child(2){border-top-color:var(--cyan)}
.stat:nth-child(3){border-top-color:var(--yellow)}
.stat:nth-child(4){border-top-color:var(--pink)}
.stat strong{display:block;font-size:31px;line-height:1.2;margin-bottom:5px}
.stat span{color:var(--muted);font-size:14px}
.intro-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:60px;align-items:start}
.intro-grid p{color:var(--muted)}
.feature-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.feature{padding:20px;background:#f7f9fd;border:1px solid #e8edf5;border-radius:14px}
.feature i{display:grid;place-items:center;width:35px;height:35px;background:#e9f0ff;color:var(--blue);border-radius:9px;font-style:normal;font-weight:900;margin-bottom:12px}
.feature p{font-size:14px;margin-bottom:0}
.service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.service-card{background:#fff;border:1px solid var(--line);padding:25px;border-radius:var(--radius);transition:.3s;position:relative;overflow:hidden}
.service-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#cbd8f8}
.service-card:after{content:"";position:absolute;width:80px;height:80px;border-radius:50%;right:-30px;bottom:-35px;background:rgba(39,100,232,.08)}
.service-icon{font-size:25px;margin-bottom:12px}
.service-card p{color:var(--muted);font-size:14px;margin-bottom:14px}
.tag-row{display:flex;gap:7px;flex-wrap:wrap}
.tag{font-size:12px;padding:4px 9px;border-radius:20px;background:#f0f4ff;color:#3155a8}
.service-card:nth-child(3n+2) .tag{background:#eafbf8;color:#147a72}
.service-card:nth-child(3n) .tag{background:#fff5e5;color:#9b6500}
.workflow{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.step{position:relative;padding:24px 18px;background:#fff;border:1px solid var(--line);min-height:176px}
.step:not(:last-child):after{content:"→";position:absolute;right:-18px;top:55px;color:var(--blue);font-size:24px;font-weight:900;z-index:2}
.step-no{font-size:14px;color:var(--blue);font-weight:900;margin-bottom:22px}
.step p{font-size:14px;color:var(--muted);margin-bottom:0}
.split-layout{display:grid;grid-template-columns:1.1fr .9fr;gap:25px;align-items:stretch}
.media-frame{background:#eef4ff;padding:12px;border-radius:20px}
.media-frame img{width:100%;border-radius:13px}
.info-block{padding:30px;background:#fff;border:1px solid var(--line);border-radius:18px}
.timeline{border-left:2px solid #dbe5fb;padding-left:24px}
.timeline-item{position:relative;margin-bottom:23px}
.timeline-item:last-child{margin-bottom:0}
.timeline-item:before{content:"";position:absolute;width:11px;height:11px;border:3px solid var(--blue);background:#fff;border-radius:50%;left:-32px;top:8px}
.timeline-item strong{display:block;color:var(--blue);font-size:14px}
.timeline-item p{font-size:14px;color:var(--muted);margin:4px 0 0}
.case-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:18px}
.case-main,.case-side{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden}
.case-main img{width:100%;aspect-ratio:16/7;object-fit:cover}
.case-main-content,.case-side-content{padding:23px}
.case-main-content p,.case-side-content p{color:var(--muted);font-size:14px}
.case-side{display:grid;grid-template-rows:1fr 1fr}
.case-side article{display:grid;grid-template-columns:120px 1fr;gap:15px;padding:15px;border-bottom:1px solid var(--line)}
.case-side article:last-child{border-bottom:0}
.case-side img{width:120px;height:100%;min-height:110px;object-fit:cover;border-radius:10px}
.compare-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:16px;background:#fff}
.compare{width:100%;min-width:760px;border-collapse:collapse;text-align:left}
.compare th,.compare td{padding:17px 18px;border-bottom:1px solid var(--line);font-size:14px}
.compare th{background:#f2f6ff;color:#3155a8}
.compare td:first-child{font-weight:800;color:var(--ink)}
.compare tr:last-child td{border-bottom:0}
.rating{display:flex;align-items:center;gap:20px;margin-top:24px;padding:20px;background:#fff8e9;border:1px solid #f7df9d;border-radius:14px}
.rating strong{font-size:34px;color:#d48700}
.stars{color:#e5a51e;letter-spacing:4px;font-size:20px}
.network{display:flex;flex-wrap:wrap;gap:10px}
.network span{padding:10px 15px;background:#fff;border:1px solid var(--line);border-radius:8px;font-size:14px;color:#46536a}
.network span:nth-child(4n){border-left:4px solid var(--pink)}
.network span:nth-child(4n+1){border-left:4px solid var(--blue)}
.network span:nth-child(4n+2){border-left:4px solid var(--cyan)}
.network span:nth-child(4n+3){border-left:4px solid var(--yellow)}
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.price-card{padding:25px;background:#fff;border:1px solid var(--line);border-radius:16px}
.price-card.featured{border:2px solid var(--blue);padding:24px;box-shadow:0 10px 28px rgba(39,100,232,.12)}
.price-card strong{font-size:24px;display:block;margin:10px 0}
.price-card p{color:var(--muted);font-size:14px}
.price-card ul{padding-left:18px;color:#59657a;font-size:14px}
.comment-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.comment{background:#fff;padding:23px;border:1px solid var(--line);border-radius:16px}
.comment blockquote{margin:0 0 17px;color:#4a566b;font-size:14px}
.comment blockquote:before{content:"“";font-size:33px;line-height:0;color:var(--blue);vertical-align:-12px;margin-right:5px}
.comment footer{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:13px}
.avatar{width:36px;height:36px;border-radius:50%;display:grid;place-items:center;color:#fff;font-weight:800;background:linear-gradient(135deg,var(--blue),var(--cyan))}
.articles{display:grid;grid-template-columns:repeat(3,1fr);gap:17px}
.article{background:#fff;border:1px solid var(--line);border-radius:15px;padding:21px;transition:.25s}
.article:hover{box-shadow:var(--shadow);transform:translateY(-3px)}
.article small{color:var(--pink);font-weight:800}
.article h3{font-size:18px;margin:10px 0}
.article p{font-size:14px;color:var(--muted);margin-bottom:14px}
.faq-list{display:grid;grid-template-columns:1fr 1fr;gap:11px 18px}
details{background:#fff;border:1px solid var(--line);border-radius:11px;padding:0 18px}
summary{cursor:pointer;list-style:none;font-weight:800;padding:17px 0;position:relative;padding-right:25px}
summary::-webkit-details-marker{display:none}
summary:after{content:"+";position:absolute;right:0;color:var(--blue);font-size:22px;top:13px}
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:.8fr 1.2fr;gap:45px;align-items:start}
.contact-points{display:grid;gap:14px;margin-top:25px}
.contact-point{display:flex;gap:12px;align-items:flex-start}
.contact-point b{display:block}
.contact-point span{font-size:14px;color:var(--muted)}
.form-card{background:#fff;padding:28px;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}
.field{display:grid;gap:7px}
.field.full{grid-column:1/-1}
label{font-size:13px;font-weight:800;color:#455168}
input,select,textarea{font:inherit;width:100%;border:1px solid #dce3ed;background:#fbfcfe;color:var(--ink);border-radius:8px;padding:12px 13px;outline:0;transition:.2s}
input:focus,select:focus,textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(39,100,232,.1)}
textarea{min-height:125px;resize:vertical}
.form-submit{margin-top:17px}
.service-cta{background:linear-gradient(120deg,#172033,#264d9f);color:#fff;border-radius:20px;padding:34px 38px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.service-cta p{color:#d8e3fa;margin-bottom:0}
.service-cta .btn{background:#fff;color:var(--ink)}
.footer{background:#172033;color:#c8d2e4;padding:48px 0 24px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px}
.footer h3{font-size:16px;color:#fff}
.footer p,.footer a{font-size:13px;color:#aebbd0}
.footer a:hover{color:#fff}
.footer-links{display:grid;gap:7px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:35px;padding-top:18px;font-size:12px;color:#91a1ba;display:flex;justify-content:space-between;gap:20px}
.qr{width:110px;background:#fff;padding:6px;border-radius:8px;margin-top:10px}
.float-actions{position:fixed;right:20px;bottom:22px;z-index:40;display:grid;gap:9px}
.float-actions a{width:47px;height:47px;border-radius:50%;display:grid;place-items:center;background:var(--blue);color:#fff;font-size:18px;box-shadow:0 8px 22px rgba(39,100,232,.25);transition:.25s}
.float-actions a:hover{transform:translateY(-3px)}
.reveal{opacity:0;transform:translateY(18px);transition:opacity .65s ease,transform .65s ease}
.reveal.show{opacity:1;transform:none}
@media(max-width:1050px){
  .nav-links a{padding-left:6px;padding-right:6px;font-size:12px}
  .hero-grid{gap:35px}
}
@media(max-width:820px){
  .container{width:min(100% - 30px,680px)}
  .navbar{min-height:66px}
  .menu-toggle{display:block}
  .nav-links{display:none;position:absolute;top:66px;left:15px;right:15px;padding:10px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);align-items:stretch}
  .nav-links.open{display:grid}
  .nav-links a{padding:11px 13px}
  .nav-action{margin:5px 0 0}
  .hero{padding:62px 0 50px}
  .hero-grid,.intro-grid,.split-layout,.form-layout{grid-template-columns:1fr}
  h1{font-size:43px}
  .hero-panel{max-width:540px}
  .stats{grid-template-columns:repeat(2,1fr)}
  .service-grid,.comment-grid{grid-template-columns:1fr 1fr}
  .workflow{grid-template-columns:1fr 1fr}
  .step:not(:last-child):after{display:none}
  .case-grid{grid-template-columns:1fr}
  .faq-list{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:560px){
  .section{padding:64px 0}
  .section-head{display:block}
  .section-head p{margin-top:12px}
  .hero-buttons{display:grid}
  .hero-buttons .btn{width:100%}
  h1{font-size:37px}
  .hero-copy{font-size:16px}
  .stats,.service-grid,.comment-grid,.articles,.price-grid,.feature-list{grid-template-columns:1fr}
  .workflow{grid-template-columns:1fr}
  .step{min-height:auto}
  .case-side article{grid-template-columns:95px 1fr}
  .case-side img{width:95px;min-height:90px}
  .form-grid{grid-template-columns:1fr}
  .field.full{grid-column:auto}
  .service-cta{display:block;padding:28px 23px}
  .service-cta .btn{margin-top:20px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{display:block}
  .footer-bottom span{display:block;margin-top:8px}
}
@media(prefers-reduced-motion:reduce){
  *,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}
}