:root{--ink:#172238;--muted:#667085;--line:#dce4ef;--paper:#f7faff;--white:#fff;--cyan:#00b8d9;--blue:#3155e7;--violet:#7147e8;--pink:#ef4ea2;--lime:#b7db32;--shadow:0 18px 50px rgba(39,64,115,.12);--radius:18px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:"Microsoft YaHei","PingFang SC",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% - 36px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.94);border-bottom:1px solid var(--line);backdrop-filter:blur(14px)}
.navbar{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:22px}
.brand{display:flex;align-items:center;min-width:150px}
.ai-page-logo{max-width:100%;height:auto;max-height:42px;width:auto}
.nav-links{display:flex;align-items:center;gap:0;justify-content:flex-end;flex-wrap:wrap}
.nav-links a{padding:8px 10px;color:#344054;font-size:13px;white-space:nowrap}
.nav-links a:hover{color:var(--blue)}
.nav-cta,.button{display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:10px;padding:12px 20px;background:linear-gradient(100deg,var(--blue),var(--violet));color:#fff;font-weight:700;box-shadow:0 8px 20px rgba(49,85,231,.22);transition:.25s}
.nav-cta:hover,.button:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(49,85,231,.3)}
.menu-toggle{display:none;background:#fff;border:1px solid var(--line);border-radius:8px;padding:8px 10px;color:var(--ink)}
.hero{position:relative;overflow:hidden;padding:88px 0 78px;background:linear-gradient(135deg,#eef8ff 0%,#f9f4ff 48%,#fff3f8 100%)}
.hero:before,.hero:after{content:"";position:absolute;border:1px solid rgba(49,85,231,.14);transform:rotate(24deg);pointer-events:none}
.hero:before{width:420px;height:420px;right:-150px;top:-210px;border-radius:38%;box-shadow:0 0 0 28px rgba(0,184,217,.05),0 0 0 58px rgba(239,78,162,.04)}
.hero:after{width:160px;height:160px;left:7%;bottom:-88px;border-radius:28%;background:rgba(183,219,50,.13)}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:minmax(0,1.12fr) minmax(320px,.88fr);gap:55px;align-items:center}
.eyebrow{display:inline-flex;padding:6px 12px;border-radius:99px;background:#fff;border:1px solid #d5e4fb;color:var(--blue);font-size:13px;font-weight:700}
h1{font-size:clamp(36px,5vw,68px);line-height:1.12;letter-spacing:0;margin:18px 0 20px;max-width:700px}
h2{font-size:clamp(26px,3vw,40px);line-height:1.25;letter-spacing:0;margin:0 0 14px}
h3{font-size:19px;line-height:1.35;margin:0 0 8px}
.lead{font-size:18px;color:#475467;max-width:680px;margin:0 0 28px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.button.secondary{background:#fff;color:var(--blue);border:1px solid #cbd8ee;box-shadow:none}
.signal-panel{padding:26px;background:#fff;border:1px solid #d8e2f1;border-radius:24px;box-shadow:var(--shadow);position:relative}
.signal-panel:before{content:"";position:absolute;left:0;top:28px;bottom:28px;width:4px;background:linear-gradient(var(--cyan),var(--pink));border-radius:4px}
.signal-panel h3,.signal-panel p{margin-left:14px}
.signal-panel p{color:var(--muted);margin-top:5px}
.signal-lines{display:grid;gap:12px;margin-top:20px}
.signal-line{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid #edf1f7;padding-bottom:10px;font-size:14px}
.signal-line strong{color:var(--blue)}
.section{padding:84px 0}
.section.alt{background:#fff}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:30px}
.section-head p{color:var(--muted);max-width:650px;margin:0}
.kicker{font-size:12px;letter-spacing:1.5px;text-transform:uppercase;color:var(--pink);font-weight:800}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:30px}
.stat{padding:20px;border:1px solid var(--line);background:#fff;border-radius:14px}
.stat strong{display:block;font-size:30px;color:var(--blue);line-height:1.2}
.stat span{font-size:13px;color:var(--muted)}
.intro-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:start}
.intro-copy{font-size:16px;color:#475467}
.check-list{display:grid;grid-template-columns:1fr 1fr;gap:12px;padding:0;margin:20px 0 0;list-style:none}
.check-list li{padding:13px 15px;background:#f7f9fd;border-left:3px solid var(--cyan);font-size:14px}
.service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.service-card,.review-card,.case-card,.info-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;transition:.25s}
.service-card:hover,.review-card:hover,.case-card:hover,.info-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#b7c7ea}
.service-card .icon{width:42px;height:42px;display:grid;place-items:center;border-radius:12px;background:#edf6ff;color:var(--blue);font-size:20px;margin-bottom:15px}
.service-card p,.review-card p,.case-card p,.info-card p{color:var(--muted);font-size:14px;margin:8px 0 0}
.service-card small{display:inline-block;margin-top:14px;color:var(--pink);font-weight:700}
.workflow{display:grid;grid-template-columns:repeat(5,1fr);gap:0;position:relative}
.workflow:before{content:"";position:absolute;top:23px;left:10%;right:10%;height:1px;background:#b8c8ee}
.step{position:relative;text-align:center;padding:0 12px}
.step b{width:46px;height:46px;margin:0 auto 16px;display:grid;place-items:center;border-radius:50%;background:#fff;border:4px solid #d9e3fb;color:var(--blue);position:relative;z-index:1}
.step h3{font-size:16px}
.step p{font-size:13px;color:var(--muted)}
.solution-grid,.case-grid,.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.solution-grid .info-card{border-top:4px solid var(--cyan)}
.case-card{padding:0;overflow:hidden}
.case-card img{width:100%;aspect-ratio:16/8;object-fit:cover}
.case-card div{padding:20px}
.table-wrap{overflow-x:auto;background:#fff;border:1px solid var(--line);border-radius:16px}
table{width:100%;border-collapse:collapse;min-width:720px}
th,td{padding:16px;border-bottom:1px solid #e8edf5;text-align:left;font-size:14px}
th{background:#f0f5ff;color:#243b83}
td:first-child{font-weight:700;color:#344054}
.rating{display:flex;gap:24px;align-items:center;margin-bottom:24px}
.rating strong{font-size:48px;color:var(--pink);line-height:1}
.stars{color:#f2a900;letter-spacing:3px;font-size:22px}
.review-card cite{display:block;margin-top:17px;font-style:normal;font-weight:700;font-size:14px;color:var(--blue)}
.tag-cloud{display:flex;flex-wrap:wrap;gap:9px;margin-top:18px}
.tag{padding:8px 13px;background:#fff;border:1px solid #d8e2ef;border-radius:99px;color:#475467;font-size:13px}
.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.article{padding:20px;background:#fff;border-bottom:3px solid var(--cyan);border-radius:12px;border-top:1px solid var(--line);border-left:1px solid var(--line);border-right:1px solid var(--line)}
.article a{color:var(--blue);font-weight:700;font-size:14px}
.faq{display:grid;grid-template-columns:1fr 1fr;gap:12px}
details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 18px}
summary{cursor:pointer;font-weight:700;padding-right:20px}
details p{color:var(--muted);font-size:14px;margin:12px 0 0}
.contact-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:30px;align-items:start}
.contact-box{padding:28px;background:linear-gradient(135deg,#152a63,#3b43a3);border-radius:22px;color:#fff}
.contact-box p{color:#dbe5ff}
.contact-box img{width:150px;border-radius:10px;margin-top:18px;background:#fff;padding:8px}
form{display:grid;grid-template-columns:1fr 1fr;gap:16px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:26px}
.field{display:flex;flex-direction:column;gap:6px}
.field.full{grid-column:1/-1}
label{font-size:13px;font-weight:700}
input,select,textarea{font:inherit;border:1px solid #ced8e6;border-radius:9px;padding:12px 13px;color:var(--ink);background:#fbfcfe}
textarea{min-height:118px;resize:vertical}
.form-note{font-size:12px;color:var(--muted);grid-column:1/-1}
footer{background:#121b32;color:#dbe5f6;padding:45px 0 22px}
.footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:35px}
footer h3{color:#fff}
footer p,footer a{font-size:14px;color:#aebbd2}
footer a:hover{color:#fff}
.footer-links{display:flex;flex-wrap:wrap;gap:8px 15px}
.copyright{border-top:1px solid rgba(255,255,255,.13);margin-top:28px;padding-top:18px;font-size:12px;color:#91a0ba}
.float-actions{position:fixed;right:18px;bottom:18px;z-index:10;display:flex;flex-direction:column;gap:8px}
.float-actions a{width:44px;height:44px;display:grid;place-items:center;border-radius:50%;background:#fff;color:var(--blue);border:1px solid #cbd8ee;box-shadow:0 8px 22px rgba(31,49,91,.16);font-weight:800}
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.reveal.show{opacity:1;transform:none}
@media(max-width:980px){
.nav-links{display:none;position:absolute;top:72px;left:0;right:0;padding:12px 18px;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 12px 20px rgba(39,64,115,.1)}
.nav-links.open{display:flex;flex-direction:column;align-items:stretch}
.nav-links a{padding:11px 4px}
.nav-cta{display:none}.menu-toggle{display:block}
.hero-grid,.intro-grid,.contact-grid{grid-template-columns:1fr}
.service-grid{grid-template-columns:repeat(2,1fr)}
.stats{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:640px){
.container{width:min(100% - 28px,1180px)}
.hero{padding:60px 0 55px}
h1{font-size:40px}
.section{padding:60px 0}
.section-head{display:block}
.section-head p{margin-top:10px}
.service-grid,.solution-grid,.case-grid,.review-grid,.article-grid,.faq{grid-template-columns:1fr}
.check-list{grid-template-columns:1fr}
.workflow{grid-template-columns:1fr;gap:18px}
.workflow:before{left:23px;top:23px;bottom:23px;width:1px;height:auto}
.step{text-align:left;padding-left:68px}
.step b{position:absolute;left:0;top:0;margin:0}
form{grid-template-columns:1fr;padding:18px}
.field.full{grid-column:auto}
.footer-grid{grid-template-columns:1fr;gap:20px}
.rating{align-items:flex-start;flex-direction:column;gap:10px}
}