:root{--ink:#172033;--muted:#667085;--paper:#f8fafc;--white:#fff;--line:#dbe3ee;--blue:#3467eb;--cyan:#19b6bd;--orange:#ff8a4c;--pink:#ed5f9d;--violet:#7058d9;--shadow:0 18px 55px rgba(35,55,95,.12);--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:20;background:rgba(255,255,255,.94);border-bottom:1px solid rgba(219,227,238,.8);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;flex:none}
.ai-page-logo{width:142px;height:auto}
.nav-links{display:flex;align-items:center;justify-content:flex-end;gap:0;flex-wrap:wrap}
.nav-links a{font-size:13px;color:#425066;padding:8px 9px;white-space:nowrap}
.nav-links a:hover,.nav-links a.active{color:var(--blue)}
.nav-cta{background:var(--ink);color:#fff!important;border-radius:9px;margin-left:8px;padding:10px 15px!important}
.menu-toggle{display:none;border:0;background:#eef3fa;color:var(--ink);border-radius:8px;font-size:22px;width:42px;height:42px}
.hero{position:relative;overflow:hidden;background:linear-gradient(135deg,#f7fbff 0%,#eef5ff 52%,#fff8f1 100%);padding:86px 0 72px}
.hero:before,.hero:after{content:"";position:absolute;border-radius:50%;pointer-events:none}
.hero:before{width:380px;height:380px;right:-150px;top:-170px;background:rgba(25,182,189,.15)}
.hero:after{width:250px;height:250px;left:-120px;bottom:-130px;background:rgba(237,95,157,.12)}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.12fr .88fr;gap:58px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;color:var(--blue);background:#e7efff;border:1px solid #cddcff;border-radius:30px;padding:5px 13px;font-size:13px;font-weight:700}
h1,h2,h3,p{margin-top:0}
h1{font-size:clamp(36px,5vw,66px);line-height:1.14;letter-spacing:0;margin:18px 0 22px;max-width:720px}
h2{font-size:clamp(28px,4vw,42px);line-height:1.2;margin-bottom:14px;letter-spacing:0}
h3{line-height:1.35;margin-bottom:10px}
.hero-copy{font-size:18px;color:#536176;max-width:670px}
.actions{display:flex;gap:12px;flex-wrap:wrap;margin:28px 0 26px}
.btn{display:inline-flex;align-items:center;justify-content:center;border:1px solid transparent;border-radius:10px;padding:12px 20px;font-weight:700;cursor:pointer;transition:.25s ease}
.btn:hover{transform:translateY(-2px);box-shadow:0 10px 22px rgba(52,103,235,.2)}
.btn-primary{background:var(--blue);color:#fff}
.btn-dark{background:var(--ink);color:#fff}
.btn-light{border-color:#cdd8e7;background:#fff;color:var(--ink)}
.hero-note{font-size:13px;color:#69778c}
.hero-panel{background:#fff;border:1px solid #dce6f4;border-radius:24px;padding:26px;box-shadow:var(--shadow);transform:rotate(1deg)}
.signal{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);padding:13px 0}
.signal:last-child{border-bottom:0}
.signal strong{font-size:24px;color:var(--blue)}
.signal small{display:block;color:var(--muted)}
.signal .dot{width:11px;height:11px;border-radius:50%;background:var(--cyan);box-shadow:0 0 0 6px #dff7f5}
.section{padding:88px 0}
.section-tint{background:#edf5ff}
.section-head{display:flex;justify-content:space-between;gap:28px;align-items:end;margin-bottom:32px}
.section-head>div:first-child{max-width:700px}
.kicker{font-size:12px;letter-spacing:1px;text-transform:uppercase;color:var(--pink);font-weight:800}
.lead{color:var(--muted);max-width:700px}
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:34px}
.metric{padding:22px;background:#fff;border:1px solid var(--line);border-radius:14px}
.metric strong{font-size:32px;color:var(--blue);display:block}
.metric span{color:var(--muted);font-size:14px}
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:42px;align-items:start}
.feature-list{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.feature{padding:18px;border-left:3px solid var(--cyan);background:#fff}
.feature p{font-size:14px;color:var(--muted);margin:0}
.service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.service{padding:22px;background:#fff;border:1px solid var(--line);border-radius:14px;transition:.25s}
.service:hover,.review:hover,.case-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.service:nth-child(4n+1){border-top:4px solid var(--blue)}
.service:nth-child(4n+2){border-top:4px solid var(--orange)}
.service:nth-child(4n+3){border-top:4px solid var(--pink)}
.service:nth-child(4n){border-top:4px solid var(--cyan)}
.service p{font-size:14px;color:var(--muted);margin:0}
.service .tag{color:var(--blue);font-size:12px;font-weight:800}
.split{display:grid;grid-template-columns:.9fr 1.1fr;gap:36px;align-items:start}
.process{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.step{position:relative;padding:20px 24px 20px 0}
.step:not(:last-child):after{content:"";position:absolute;top:38px;right:10px;width:calc(100% - 70px);height:1px;background:#b9cae5}
.step-no{width:36px;height:36px;border-radius:50%;display:grid;place-items:center;background:var(--blue);color:#fff;font-weight:800;margin-bottom:16px;position:relative;z-index:1}
.step p{font-size:14px;color:var(--muted)}
.timeline{border-left:2px solid #b8c9ea;padding-left:24px}
.timeline-item{position:relative;margin-bottom:25px}
.timeline-item:before{content:"";position:absolute;left:-32px;top:8px;width:12px;height:12px;border-radius:50%;background:var(--orange);border:3px solid var(--paper)}
.timeline-item strong{display:block;color:var(--blue)}
.timeline-item span{font-size:14px;color:var(--muted)}
.table-wrap{overflow-x:auto;background:#fff;border:1px solid var(--line);border-radius:14px}
table{width:100%;min-width:720px;border-collapse:collapse}
th,td{text-align:left;padding:17px 18px;border-bottom:1px solid var(--line);font-size:14px}
th{background:#eaf1ff;color:#24458e}
tr:last-child td{border-bottom:0}
.rating{display:flex;gap:15px;align-items:center;padding:24px;background:linear-gradient(135deg,#172033,#3156a0);color:#fff;border-radius:16px;margin-bottom:20px}
.rating strong{font-size:38px;color:#ffd36a}
.rating span{color:#d9e5ff}
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.case-card{overflow:hidden;background:#fff;border:1px solid var(--line);border-radius:14px;transition:.25s}
.media{aspect-ratio:16/9;overflow:hidden;background:#e8eff8}
.media img{width:100%;height:100%;object-fit:cover}
.case-body{padding:18px}
.case-body p{font-size:14px;color:var(--muted);margin:0}
.logo-strip{display:flex;flex-wrap:wrap;gap:9px;margin-top:22px}
.logo-strip span,.tag-cloud span{padding:7px 12px;border-radius:8px;background:#fff;border:1px solid var(--line);font-size:13px;color:#48576d}
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
.tag-cloud span:nth-child(3n){background:#fff0f5;color:#a43368;border-color:#ffd1e2}
.tag-cloud span:nth-child(3n+1){background:#eaf8f8;color:#16767a;border-color:#c9eeee}
.reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.review{background:#fff;border:1px solid var(--line);padding:22px;border-radius:14px;transition:.25s}
.quote{font-size:30px;line-height:1;color:var(--pink)}
.review p{font-size:14px;color:#536176}
.review strong{font-size:14px}
.review small{display:block;color:var(--muted);margin-top:3px}
.article-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.article{background:#fff;border:1px solid var(--line);padding:16px;border-radius:10px;font-size:14px;color:#34445a}
.article:hover{border-color:var(--blue);color:var(--blue)}
.faq-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}
details{background:#fff;border:1px solid var(--line);border-radius:10px;padding:16px 18px}
summary{cursor:pointer;font-weight:700}
details p{color:var(--muted);font-size:14px;margin:12px 0 0}
.contact-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:28px;align-items:start}
.contact-card{background:var(--ink);color:#fff;border-radius:18px;padding:28px}
.contact-card p{color:#ccd7e9}
.contact-info{display:grid;gap:15px;margin-top:24px}
.contact-info div{padding-bottom:15px;border-bottom:1px solid rgba(255,255,255,.15)}
.contact-info span{display:block;color:#aebdd3;font-size:13px}
.form-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:26px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
label{font-size:13px;font-weight:700;display:grid;gap:7px}
input,select,textarea{width:100%;font:inherit;border:1px solid #ccd7e5;border-radius:8px;padding:11px 12px;color:var(--ink);background:#fff}
textarea{min-height:128px;resize:vertical}
.full{grid-column:1/-1}
.footer{background:#172033;color:#dbe5f4;padding:38px 0 24px}
.footer-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:32px}
.footer h3{color:#fff;font-size:17px}
.footer p,.footer a{font-size:13px;color:#adbad0}
.footer a:hover{color:#fff}
.footer-links{display:flex;flex-wrap:wrap;gap:8px 18px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.14);margin-top:28px;padding-top:18px;font-size:12px;color:#95a6bf;display:flex;justify-content:space-between;gap:14px}
.float-contact{position:fixed;right:20px;bottom:22px;z-index:15;background:var(--orange);color:#fff;border-radius:30px;padding:11px 16px;font-size:13px;font-weight:700;box-shadow:0 10px 25px rgba(255,138,76,.35)}
.to-top{position:fixed;right:20px;bottom:76px;display:none;border:0;background:#fff;color:var(--ink);width:38px;height:38px;border-radius:50%;box-shadow:0 5px 20px rgba(23,32,51,.16);cursor:pointer}
.reveal{opacity:0;transform:translateY(18px);transition:.7s ease}
.reveal.visible{opacity:1;transform:none}
@media(max-width:1050px){
.nav-links a{padding:7px 5px;font-size:12px}.service-grid{grid-template-columns:repeat(3,1fr)}.article-grid{grid-template-columns:repeat(3,1fr)}
}
@media(max-width:820px){
.container{width:min(100% - 28px,680px)}.navbar{min-height:68px}.menu-toggle{display:block}.nav-links{display:none;position:absolute;left:14px;right:14px;top:68px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px;box-shadow:var(--shadow);align-items:stretch}.nav-links.open{display:flex;flex-direction:column}.nav-links a{padding:10px 12px;border-bottom:1px solid #edf1f6}.nav-links a:last-child{border:0}.nav-cta{margin-left:0;text-align:center}.hero{padding:62px 0 52px}.hero-grid,.about-grid,.split,.contact-grid{grid-template-columns:1fr}.hero-panel{transform:none}.metrics{grid-template-columns:repeat(2,1fr)}.service-grid{grid-template-columns:repeat(2,1fr)}.process{grid-template-columns:1fr 1fr}.step:not(:last-child):after{display:none}.case-grid,.reviews{grid-template-columns:1fr 1fr}.faq-list{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:560px){
h1{font-size:38px}.section{padding:62px 0}.section-head{display:block}.feature-list,.metrics,.service-grid,.case-grid,.reviews,.article-grid,.form-grid,.footer-grid{grid-template-columns:1fr}.process{grid-template-columns:1fr}.actions .btn{width:100%}.footer-bottom{display:block}.footer-bottom span{display:block;margin-top:8px}
}