*{margin:0;padding:0;box-sizing:border-box}
:root{
--bg:#0a0614;
--bg2:#120a24;
--card:#170d2e;
--card2:#1e1240;
--pink:#ff2e9a;
--purple:#9d4bff;
--violet:#c04bff;
--cyan:#22e0ff;
--text:#efe8ff;
--muted:#a99cc9;
--line:rgba(157,75,255,.28);
--grad:linear-gradient(120deg,#ff2e9a,#9d4bff 60%,#22e0ff);
}
html{scroll-behavior:smooth}
body{
font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",sans-serif;
background:var(--bg);color:var(--text);line-height:1.7;overflow-x:hidden;
-webkit-font-smoothing:antialiased;
}
body::before{
content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
background:
radial-gradient(circle at 15% 10%,rgba(255,46,154,.18),transparent 40%),
radial-gradient(circle at 85% 20%,rgba(157,75,255,.20),transparent 45%),
radial-gradient(circle at 50% 90%,rgba(34,224,255,.10),transparent 50%),
linear-gradient(180deg,#0a0614,#120a24 50%,#0a0614);
}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
section{position:relative;padding:80px 0}
.section-head{text-align:center;max-width:820px;margin:0 auto 48px}
.eyebrow{
display:inline-block;font-size:13px;letter-spacing:3px;text-transform:uppercase;
color:var(--pink);border:1px solid var(--line);padding:6px 16px;border-radius:999px;
margin-bottom:18px;background:rgba(255,46,154,.06);
}
h1,h2,h3,h4{line-height:1.3;font-weight:800;letter-spacing:.5px}
.section-head h2{font-size:clamp(24px,3.4vw,38px);margin-bottom:14px}
.section-head p{color:var(--muted);font-size:16px}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.btn{
display:inline-flex;align-items:center;justify-content:center;gap:8px;
padding:14px 30px;border-radius:12px;font-size:15px;font-weight:700;
cursor:pointer;border:none;transition:transform .25s,box-shadow .25s,background .25s;
}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 8px 26px rgba(255,46,154,.35)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 14px 34px rgba(255,46,154,.55)}
.btn-ghost{background:transparent;color:var(--text);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--pink);color:var(--pink);transform:translateY(-3px)}
.btn:active{transform:scale(.97)}

/* nav */
.nav{
position:sticky;top:0;z-index:100;background:rgba(10,6,20,.82);
backdrop-filter:blur(14px);border-bottom:1px solid var(--line);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px}
.brand .ai-page-logo{width:36px;height:36px;object-fit:contain}
.nav-links{display:flex;align-items:center;gap:0;list-style:none}
.nav-links li a{
display:block;padding:10px 14px;font-size:14px;color:var(--muted);border-radius:8px;
transition:color .2s,background .2s;
}
.nav-links li a:hover{color:var(--pink);background:rgba(255,46,154,.08)}
.nav-actions{display:flex;align-items:center;gap:12px}
.nav-actions .btn{padding:9px 18px;font-size:13px}
.menu-toggle{display:none;background:none;border:1px solid var(--line);color:var(--text);font-size:20px;width:42px;height:42px;border-radius:10px;cursor:pointer}

/* hero */
.hero{padding:110px 0 90px;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:50px;align-items:center}
.hero h1{font-size:clamp(30px,4.6vw,54px);margin-bottom:22px}
.hero .sub{color:var(--muted);font-size:17px;margin-bottom:14px;max-width:560px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:30px}
.hero-tags span{
font-size:13px;padding:6px 14px;border-radius:999px;color:#ffd5ec;
border:1px solid var(--line);background:rgba(157,75,255,.10);
}
.hero-cta{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:34px}
.hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;max-width:560px}
.hero-stat{
background:rgba(30,18,64,.6);border:1px solid var(--line);border-radius:14px;padding:16px;
}
.hero-stat b{display:block;font-size:24px;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-stat small{color:var(--muted);font-size:13px}
.hero-visual{position:relative;height:420px}
.orb{
position:absolute;border-radius:50%;filter:blur(2px);
animation:float 8s ease-in-out infinite;
}
.orb.a{width:220px;height:220px;top:10px;right:30px;background:radial-gradient(circle at 30% 30%,rgba(255,46,154,.9),rgba(255,46,154,0) 70%)}
.orb.b{width:180px;height:180px;bottom:40px;left:10px;background:radial-gradient(circle at 30% 30%,rgba(157,75,255,.9),rgba(157,75,255,0) 70%);animation-delay:2s}
.orb.c{width:120px;height:120px;top:180px;left:120px;background:radial-gradient(circle at 30% 30%,rgba(34,224,255,.8),rgba(34,224,255,0) 70%);animation-delay:4s}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-22px)}}
.hero-card{
position:absolute;inset:auto 0 0 auto;top:50%;left:50%;transform:translate(-50%,-50%);
width:min(340px,90%);background:linear-gradient(160deg,rgba(30,18,64,.95),rgba(23,13,46,.95));
border:1px solid var(--line);border-radius:20px;padding:24px;
box-shadow:0 30px 70px rgba(0,0,0,.55);
}
.hero-card h3{font-size:17px;margin-bottom:14px}
.hero-card ul{list-style:none;display:grid;gap:10px}
.hero-card li{display:flex;justify-content:space-between;font-size:14px;color:var(--muted);border-bottom:1px dashed rgba(157,75,255,.2);padding-bottom:8px}
.hero-card li b{color:#fff;font-weight:700}

/* cards grid */
.grid{display:grid;gap:22px}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
.card{
background:linear-gradient(160deg,rgba(30,18,64,.75),rgba(23,13,46,.75));
border:1px solid var(--line);border-radius:18px;padding:26px;
transition:transform .3s,box-shadow .3s,border-color .3s;
}
.card:hover{transform:translateY(-6px);border-color:rgba(255,46,154,.5);box-shadow:0 18px 44px rgba(157,75,255,.25)}
.card .ico{
width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;
background:var(--grad);font-size:22px;margin-bottom:16px;color:#fff;
}
.card h3{font-size:17px;margin-bottom:10px}
.card p{color:var(--muted);font-size:14px}

/* stats strip */
.strip{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.strip .item{text-align:center;padding:26px 14px;border:1px solid var(--line);border-radius:16px;background:rgba(23,13,46,.6)}
.strip .item b{display:block;font-size:34px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.strip .item span{color:var(--muted);font-size:14px}

/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;position:relative}
.step{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:26px;position:relative}
.step .num{
width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;
font-weight:800;background:var(--grad);color:#fff;margin-bottom:16px;
}
.step h3{font-size:16px;margin-bottom:8px}
.step p{color:var(--muted);font-size:14px}

/* table */
.table-wrap{overflow-x:auto;border-radius:16px;border:1px solid var(--line);background:rgba(23,13,46,.6)}
table{width:100%;border-collapse:collapse;min-width:680px}
th,td{padding:15px 18px;text-align:left;font-size:14px;border-bottom:1px solid rgba(157,75,255,.15)}
th{background:rgba(157,75,255,.16);color:#fff;font-weight:700;white-space:nowrap}
td{color:var(--muted)}
tr:last-child td{border-bottom:none}
tr:hover td{background:rgba(255,46,154,.05)}
.badge{display:inline-block;padding:3px 10px;border-radius:999px;font-size:12px;background:rgba(255,46,154,.16);color:#ff8ec9}
.stars{color:#ffcf3f;letter-spacing:2px}

/* rating */
.rating{display:grid;grid-template-columns:.8fr 1.2fr;gap:26px;align-items:stretch}
.rating-score{
background:linear-gradient(160deg,rgba(255,46,154,.16),rgba(157,75,255,.16));
border:1px solid var(--line);border-radius:20px;padding:36px;text-align:center;
display:flex;flex-direction:column;justify-content:center;
}
.rating-score .score{font-size:72px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1}
.rating-score .score small{font-size:22px;color:var(--muted);-webkit-text-fill-color:var(--muted)}
.rating-score .stars{font-size:26px;margin:14px 0 6px}
.rating-score p{color:var(--muted);font-size:14px}
.rating-list{display:grid;gap:14px}
.rating-row{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px 20px}
.rating-row .top{display:flex;justify-content:space-between;margin-bottom:8px;font-size:14px}
.rating-row .bar{height:8px;border-radius:999px;background:rgba(157,75,255,.15);overflow:hidden}
.rating-row .bar i{display:block;height:100%;background:var(--grad);border-radius:999px;width:0;transition:width 1.2s ease}

/* reviews */
.review{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:26px;display:flex;flex-direction:column;justify-content:space-between}
.review p{color:var(--muted);font-size:14px;margin-bottom:18px}
.review .who{display:flex;align-items:center;gap:12px}
.review .avatar{width:42px;height:42px;border-radius:50%;background:var(--grad);display:flex;align-items:center;justify-content:center;font-weight:800;color:#fff}
.review .who b{display:block;font-size:14px}
.review .who small{color:var(--muted);font-size:12px}
.review .stars{font-size:14px;margin-bottom:12px}

/* cases */
.case{position:relative;border-radius:18px;overflow:hidden;border:1px solid var(--line);background:var(--card)}
.case img{width:100%;height:220px;object-fit:cover;transition:transform .5s}
.case:hover img{transform:scale(1.06)}
.case .body{padding:20px}
.case h3{font-size:16px;margin-bottom:8px}
.case p{color:var(--muted);font-size:13px}
.case .tag{display:inline-block;margin-top:12px;font-size:12px;color:#ff8ec9;border:1px solid var(--line);border-radius:999px;padding:3px 12px}

/* tags cloud */
.cloud{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}
.cloud a{
font-size:14px;padding:9px 18px;border-radius:999px;border:1px solid var(--line);
color:var(--muted);background:rgba(23,13,46,.7);transition:all .25s;
}
.cloud a:hover{color:#fff;background:var(--grad);border-color:transparent;transform:translateY(-3px)}

/* articles */
.article{display:flex;gap:16px;padding:18px;border:1px solid var(--line);border-radius:14px;background:var(--card);transition:transform .25s,border-color .25s}
.article:hover{transform:translateY(-4px);border-color:rgba(255,46,154,.5)}
.article .idx{font-size:26px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;min-width:44px}
.article h3{font-size:15px;margin-bottom:6px}
.article p{color:var(--muted);font-size:13px}

/* timeline */
.timeline{position:relative;padding-left:28px}
.timeline::before{content:"";position:absolute;left:7px;top:6px;bottom:6px;width:2px;background:linear-gradient(var(--pink),var(--purple),var(--cyan))}
.tl-item{position:relative;margin-bottom:26px}
.tl-item::before{content:"";position:absolute;left:-28px;top:6px;width:16px;height:16px;border-radius:50%;background:var(--grad);box-shadow:0 0 0 4px rgba(157,75,255,.18)}
.tl-item b{font-size:15px}
.tl-item span{display:block;color:var(--muted);font-size:13px}

/* form */
.form-card{background:linear-gradient(160deg,rgba(30,18,64,.9),rgba(23,13,46,.9));border:1px solid var(--line);border-radius:20px;padding:34px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:8px}
.field.full{grid-column:1/-1}
.field label{font-size:13px;color:var(--muted)}
.field input,.field select,.field textarea{
width:100%;padding:13px 16px;border-radius:10px;border:1px solid var(--line);
background:rgba(10,6,20,.6);color:var(--text);font-size:14px;font-family:inherit;transition:border-color .2s,box-shadow .2s;
}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--pink);box-shadow:0 0 0 3px rgba(255,46,154,.15)}
.field textarea{resize:vertical;min-height:120px}
.field select option{background:#170d2e}
.form-tip{color:var(--muted);font-size:12px;margin-top:12px}

/* contact */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px}
.contact-item{display:flex;gap:14px;align-items:flex-start;padding:18px;border:1px solid var(--line);border-radius:14px;background:var(--card)}
.contact-item .ci{width:42px;height:42px;border-radius:10px;background:var(--grad);display:flex;align-items:center;justify-content:center;font-size:18px;flex:none}
.contact-item b{display:block;font-size:14px;margin-bottom:4px}
.contact-item span{color:var(--muted);font-size:13px;word-break:break-all}
.qr-box{text-align:center;border:1px solid var(--line);border-radius:16px;padding:20px;background:var(--card)}
.qr-box img{width:170px;height:170px;object-fit:contain;margin:0 auto 12px;border-radius:10px;background:#fff}
.qr-box p{color:var(--muted);font-size:13px}

/* faq */
.faq-item{border:1px solid var(--line);border-radius:14px;margin-bottom:14px;background:var(--card);overflow:hidden}
.faq-q{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:18px 22px;cursor:pointer;font-weight:700;font-size:15px}
.faq-q .plus{font-size:22px;color:var(--pink);transition:transform .3s;flex:none}
.faq-item.active .plus{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease;color:var(--muted);font-size:14px}
.faq-a p{padding:0 22px 20px}

/* footer */
footer{border-top:1px solid var(--line);padding:60px 0 30px;background:rgba(10,6,20,.7)}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;margin-bottom:40px}
.foot-brand p{color:var(--muted);font-size:13px;margin-top:14px}
.foot-col h4{font-size:15px;margin-bottom:16px}
.foot-col a,.foot-col span{display:block;color:var(--muted);font-size:13px;margin-bottom:10px;transition:color .2s}
.foot-col a:hover{color:var(--pink)}
.foot-bottom{border-top:1px solid var(--line);padding-top:24px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;color:var(--muted);font-size:13px}

/* float */
.float-bar{position:fixed;right:20px;bottom:24px;z-index:120;display:flex;flex-direction:column;gap:12px}
.float-btn{
width:54px;height:54px;border-radius:50%;display:flex;align-items:center;justify-content:center;
background:var(--grad);color:#fff;font-size:20px;cursor:pointer;border:none;
box-shadow:0 10px 26px rgba(255,46,154,.4);transition:transform .25s;
}
.float-btn:hover{transform:scale(1.08)}
.float-btn.top{background:rgba(30,18,64,.95);border:1px solid var(--line);font-size:16px}
.kf-panel{
position:fixed;right:86px;bottom:24px;z-index:121;width:220px;background:var(--card2);
border:1px solid var(--line);border-radius:16px;padding:18px;display:none;
box-shadow:0 20px 50px rgba(0,0,0,.6);
}
.kf-panel.show{display:block}
.kf-panel img{width:100%;border-radius:10px;background:#fff}
.kf-panel p{text-align:center;color:var(--muted);font-size:12px;margin-top:10px}

/* reveal */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* responsive */
@media(max-width:1024px){
.hero-grid{grid-template-columns:1fr}
.hero-visual{height:340px;order:-1}
.g4{grid-template-columns:repeat(2,1fr)}
.rating{grid-template-columns:1fr}
.foot-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:860px){
.nav-links{
display:none;position:absolute;top:68px;left:0;right:0;flex-direction:column;
background:rgba(12,7,24,.98);border-bottom:1px solid var(--line);padding:12px 20px;
}
.nav-links.open{display:flex}
.nav-links li{width:100%}
.nav-links li a{padding:12px 0;border-bottom:1px solid rgba(157,75,255,.12)}
.menu-toggle{display:block}
.nav-actions .btn-ghost{display:none}
.g3{grid-template-columns:1fr 1fr}
.steps{grid-template-columns:1fr 1fr}
.strip{grid-template-columns:1fr 1fr}
.contact-grid{grid-template-columns:1fr}
.form-grid{grid-template-columns:1fr}
}
@media(max-width:600px){
section{padding:56px 0}
.g3,.g2,.g4{grid-template-columns:1fr}
.steps{grid-template-columns:1fr}
.hero-stats{grid-template-columns:1fr}
.strip{grid-template-columns:1fr 1fr}
.foot-grid{grid-template-columns:1fr}
.hero{padding:70px 0 60px}
.float-bar{right:14px;bottom:16px}
.kf-panel{right:78px;left:14px;width:auto}
}