*{margin:0;padding:0;box-sizing:border-box}
:root{
--ink:#161b2e;--ink2:#2c3348;--muted:#5b6478;--line:#e7e9f2;
--paper:#fdfcf8;--card:#ffffff;
--blue:#1a3bff;--pink:#ff2d78;--lime:#c8ff3d;--violet:#7a3bff;--amber:#ffb020;
--grad:linear-gradient(90deg,#1a3bff,#7a3bff 55%,#ff2d78);
--shadow:0 14px 40px rgba(26,59,255,.10);
--radius:18px;
}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;background:var(--paper);color:var(--ink);line-height:1.65;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
img{display:block;max-width:100%;height:auto}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 20px}
/* NAV */
.topbar{position:sticky;top:0;z-index:100;background:rgba(253,252,248,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;min-height:68px;gap:14px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand img{height:34px;width:auto}
.brand-name{font-size:17px;font-weight:800;letter-spacing:.5px}
.nav-links{display:flex;align-items:center;gap:0;flex-wrap:nowrap;overflow-x:auto}
.nav-links a{padding:8px 11px;font-size:14px;color:var(--ink2);border-radius:9px;white-space:nowrap;transition:.2s}
.nav-links a:hover{color:var(--blue);background:#f0f2ff}
.nav-cta{display:flex;align-items:center;gap:10px;flex-shrink:0}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:none;cursor:pointer;font-family:inherit;font-weight:700;border-radius:12px;transition:transform .18s,box-shadow .18s,filter .18s}
.btn:active{transform:translateY(1px) scale(.99)}
.btn-primary{background:var(--grad);color:#fff;padding:11px 20px;font-size:14px;box-shadow:0 8px 22px rgba(122,59,255,.28)}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-2px);box-shadow:0 12px 28px rgba(122,59,255,.36)}
.btn-ghost{background:#fff;color:var(--ink);padding:11px 18px;font-size:14px;border:1.5px solid var(--line)}
.btn-ghost:hover{border-color:var(--blue);color:var(--blue);transform:translateY(-2px)}
.menu-toggle{display:none;background:var(--ink);color:#fff;border:none;width:42px;height:42px;border-radius:11px;font-size:20px;cursor:pointer}
/* HERO */
.hero{position:relative;overflow:hidden;padding:70px 0 60px;background:radial-gradient(circle at 88% 10%,rgba(255,45,120,.12),transparent 46%),radial-gradient(circle at 10% 90%,rgba(26,59,255,.10),transparent 44%),linear-gradient(180deg,#fdfcf8,#f4f2ff)}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);padding:7px 14px;border-radius:999px;font-size:13px;font-weight:700;color:var(--violet);box-shadow:var(--shadow)}
.eyebrow i{width:8px;height:8px;border-radius:50%;background:var(--pink);display:inline-block;animation:pulse 1.8s infinite}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.45;transform:scale(.8)}}
h1{font-size:clamp(30px,4.4vw,50px);line-height:1.18;font-weight:900;letter-spacing:-.5px;margin:20px 0 18px}
h1 .hl{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-lead{font-size:16px;color:var(--muted);max-width:520px;margin-bottom:26px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px}
.hero-actions .btn{padding:15px 28px;font-size:15px}
.hero-points{display:flex;flex-wrap:wrap;gap:10px 22px;font-size:14px;color:var(--ink2)}
.hero-points span{display:inline-flex;align-items:center;gap:6px}
.hero-points svg{width:16px;height:16px;flex-shrink:0}
.hero-panel{background:#fff;border:1px solid var(--line);border-radius:24px;padding:26px;box-shadow:var(--shadow);position:relative}
.hero-panel::before{content:"";position:absolute;inset:-1px;border-radius:24px;padding:1px;background:var(--grad);-webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);-webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none;opacity:.55}
.panel-title{font-size:13px;font-weight:800;letter-spacing:1.5px;color:var(--violet);text-transform:uppercase;margin-bottom:16px}
.model-chips{display:flex;flex-wrap:wrap;gap:8px}
.model-chips span{font-size:12.5px;font-weight:600;padding:5px 11px;border-radius:8px;background:#f4f2ff;color:var(--ink2);border:1px solid #e8e5ff;transition:.2s}
.model-chips span:hover{background:var(--blue);color:#fff;transform:translateY(-2px)}
.panel-foot{margin-top:20px;padding-top:16px;border-top:1px dashed var(--line);display:flex;justify-content:space-between;gap:12px}
.panel-foot div{text-align:left}
.panel-foot b{display:block;font-size:19px;color:var(--ink)}
.panel-foot small{font-size:12px;color:var(--muted)}
/* SECTION */
section{padding:64px 0}
.sec-head{max-width:760px;margin:0 auto 40px;text-align:center}
.sec-tag{display:inline-block;font-size:13px;font-weight:800;letter-spacing:2px;color:var(--pink);text-transform:uppercase;margin-bottom:12px}
h2{font-size:clamp(24px,3.2vw,34px);font-weight:900;letter-spacing:-.3px;line-height:1.28}
.sec-head p{color:var(--muted);font-size:15px;margin-top:12px}
.band{background:linear-gradient(180deg,#f4f2ff,#fdfcf8)}
/* STATS */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px 20px;text-align:center;transition:.25s}
.stat:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.stat b{display:block;font-size:30px;font-weight:900;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1.2}
.stat span{font-size:13.5px;color:var(--muted)}
/* CARDS */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:transform .25s,box-shadow .25s,border-color .25s;position:relative;overflow:hidden}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:#d7d3ff}
.card .ico{width:46px;height:46px;border-radius:13px;display:flex;align-items:center;justify-content:center;font-size:22px;margin-bottom:16px;background:#f0f2ff;color:var(--blue)}
.card h3{font-size:17.5px;font-weight:800;margin-bottom:9px}
.card p{font-size:14px;color:var(--muted);line-height:1.7}
.card .bar{position:absolute;left:0;bottom:0;height:3px;width:0;background:var(--grad);transition:width .35s}
.card:hover .bar{width:100%}
/* service tags */
.tagcloud{display:flex;flex-wrap:wrap;gap:10px}
.tagcloud span{font-size:13.5px;padding:8px 15px;border-radius:999px;background:#fff;border:1px solid var(--line);color:var(--ink2);font-weight:600;transition:.2s}
.tagcloud span:hover{background:var(--ink);color:#fff;border-color:var(--ink);transform:translateY(-2px)}
/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:st}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px 20px;position:relative}
.step::before{counter-increment:st;content:"0" counter(st);display:block;font-size:26px;font-weight:900;color:transparent;background:var(--grad);-webkit-background-clip:text;background-clip:text;margin-bottom:10px}
.step h3{font-size:16px;font-weight:800;margin-bottom:8px}
.step p{font-size:13.5px;color:var(--muted)}
/* compare */
.compare-wrap{overflow-x:auto;background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow)}
table.compare{width:100%;border-collapse:collapse;min-width:680px}
table.compare th,table.compare td{padding:15px 18px;text-align:left;font-size:14px;border-bottom:1px solid var(--line)}
table.compare thead th{background:#f7f6ff;font-weight:800;font-size:14px;color:var(--ink)}
table.compare thead th:first-child{border-radius:20px 0 0 0}
table.compare thead th:last-child{border-radius:0 20px 0 0}
table.compare tbody tr:last-child td{border-bottom:none}
table.compare tbody tr:hover{background:#fbfaff}
table.compare .good{color:#0d8a3f;font-weight:700}
table.compare .mid{color:var(--muted)}
.score-box{display:flex;flex-wrap:wrap;gap:18px;align-items:center;justify-content:space-between;margin-bottom:26px;background:#fff;border:1px solid var(--line);border-radius:20px;padding:22px 26px;box-shadow:var(--shadow)}
.score-main{display:flex;align-items:center;gap:16px}
.score-num{font-size:42px;font-weight:900;line-height:1;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.score-num small{font-size:16px;color:var(--muted);font-weight:600;-webkit-text-fill-color:var(--muted)}
.stars{color:#ffb020;font-size:19px;letter-spacing:3px}
.score-info b{display:block;font-size:16px;font-weight:800}
.score-info span{font-size:13.5px;color:var(--muted)}
/* reviews */
.review{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;display:flex;flex-direction:column;gap:14px;transition:.25s}
.review:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.review .r-stars{color:#ffb020;font-size:15px;letter-spacing:2px}
.review p{font-size:14px;color:var(--ink2);line-height:1.75;flex:1}
.r-user{display:flex;align-items:center;gap:12px;border-top:1px solid var(--line);padding-top:14px}
.avatar{width:42px;height:42px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:800;color:#fff;font-size:15px;flex-shrink:0}
.r-user b{display:block;font-size:14px;font-weight:800}
.r-user span{font-size:12.5px;color:var(--muted)}
/* cases */
.case{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.25s}
.case:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.case .thumb{aspect-ratio:16/10;background:#f3f1ff;overflow:hidden}
.case .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.case:hover .thumb img{transform:scale(1.05)}
.case .body{padding:20px}
.case .body h3{font-size:16px;font-weight:800;margin-bottom:8px}
.case .body p{font-size:13.5px;color:var(--muted)}
/* articles */
.articles{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.article{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;transition:.25s;display:flex;flex-direction:column;gap:8px}
.article:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#d7d3ff}
.article .a-tag{font-size:11.5px;font-weight:800;color:var(--pink);letter-spacing:1px}
.article b{font-size:14px;font-weight:800;line-height:1.45}
.article span{font-size:12.5px;color:var(--muted);margin-top:auto}
/* form */
.form-wrap{background:#fff;border:1px solid var(--line);border-radius:24px;padding:34px;box-shadow:var(--shadow)}
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.field{display:flex;flex-direction:column;gap:7px}
.field.full{grid-column:1/-1}
.field label{font-size:13.5px;font-weight:700;color:var(--ink2)}
.field input,.field select,.field textarea{font-family:inherit;font-size:14.5px;padding:12px 14px;border:1.5px solid var(--line);border-radius:11px;background:#fdfcf8;color:var(--ink);transition:.2s;width:100%}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--blue);background:#fff;box-shadow:0 0 0 4px rgba(26,59,255,.08)}
.field textarea{resize:vertical;min-height:110px}
.form-wrap .btn-primary{width:100%;padding:15px;font-size:15px;margin-top:8px}
/* contact cards */
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:26px}
.contact{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;text-align:center}
.contact b{display:block;font-size:14.5px;font-weight:800;margin-bottom:6px}
.contact span{font-size:13px;color:var(--muted);word-break:break-all}
/* faq */
.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;margin-bottom:12px;overflow:hidden;transition:border-color .2s}
.faq-item.open{border-color:#c9c3ff;box-shadow:var(--shadow)}
.faq-q{width:100%;background:none;border:none;font-family:inherit;font-size:15px;font-weight:700;color:var(--ink);text-align:left;padding:18px 22px;display:flex;justify-content:space-between;align-items:center;gap:14px;cursor:pointer}
.faq-q .plus{width:24px;height:24px;border-radius:50%;background:#f0f2ff;color:var(--blue);display:flex;align-items:center;justify-content:center;font-size:16px;flex-shrink:0;transition:transform .3s}
.faq-item.open .plus{transform:rotate(45deg);background:var(--blue);color:#fff}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a p{padding:0 22px 18px;font-size:14px;color:var(--muted);line-height:1.75}
/* footer */
footer{background:#14172b;color:#c9cde0;padding:54px 0 0;margin-top:20px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px;padding-bottom:36px}
footer h4{color:#fff;font-size:15px;font-weight:800;margin-bottom:16px}
footer p,footer a{font-size:13.5px;color:#a9b0c9;line-height:1.9}
footer a:hover{color:#fff}
.foot-links{display:flex;flex-direction:column;gap:6px}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.foot-brand img{height:32px;width:auto;filter:brightness(0) invert(1)}
.foot-brand b{color:#fff;font-size:16px;font-weight:800}
.foot-bottom{border-top:1px solid #262a45;padding:18px 0;display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;font-size:12.5px;color:#8890ab}
/* float */
.float-kefu{position:fixed;right:18px;bottom:24px;z-index:200;display:flex;flex-direction:column;gap:10px;align-items:flex-end}
.float-kefu .kf-btn{width:52px;height:52px;border-radius:50%;background:var(--grad);color:#fff;border:none;font-size:22px;cursor:pointer;box-shadow:0 10px 26px rgba(122,59,255,.4);display:flex;align-items:center;justify-content:center;transition:.2s}
.float-kefu .kf-btn:hover{transform:scale(1.08)}
.kf-panel{display:none;background:#fff;border:1px solid var(--line);border-radius:16px;padding:16px;box-shadow:0 18px 46px rgba(20,23,43,.18);text-align:center;width:190px}
.kf-panel.show{display:block;animation:fadeIn .25s}
@keyframes fadeIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
.kf-panel img{border-radius:10px;margin:0 auto 8px;width:150px}
.kf-panel b{font-size:13.5px;display:block;margin-bottom:4px}
.kf-panel span{font-size:12px;color:var(--muted)}
.backtop{width:46px;height:46px;border-radius:50%;background:#fff;border:1px solid var(--line);color:var(--ink);cursor:pointer;font-size:18px;display:none;align-items:center;justify-content:center;box-shadow:var(--shadow)}
.backtop.show{display:flex}
/* reveal */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
/* responsive */
@media(max-width:1024px){
.hero-grid{grid-template-columns:1fr;gap:32px}
.stats{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(2,1fr)}
.steps{grid-template-columns:repeat(2,1fr)}
.articles{grid-template-columns:repeat(3,1fr)}
.foot-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:880px){
.nav-links{display:none;position:absolute;top:68px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:12px 20px 18px;border-bottom:1px solid var(--line);box-shadow:0 18px 30px rgba(20,23,43,.08);gap:2px;overflow:visible}
.nav-links.open{display:flex}
.nav-links a{padding:11px 12px}
.menu-toggle{display:block}
.nav-cta .btn-ghost{display:none}
.contact-grid{grid-template-columns:1fr}
}
@media(max-width:640px){
.hero{padding:46px 0 44px}
.grid-3,.grid-2,.steps,.form-grid,.articles{grid-template-columns:1fr}
.stats{grid-template-columns:repeat(2,1fr)}
.form-wrap{padding:22px}
section{padding:46px 0}
.score-box{padding:18px}
.score-num{font-size:34px}
.foot-grid{grid-template-columns:1fr;gap:24px}
.hero-actions .btn{width:100%}
.nav-cta .btn-primary{padding:9px 14px;font-size:13px}
}