:root{
  --bg:#070b18;
  --bg2:#0b1024;
  --panel:rgba(18,24,48,0.72);
  --panel-solid:#121830;
  --line:rgba(120,160,255,0.16);
  --cyan:#22e0ff;
  --blue:#3b82f6;
  --violet:#8b5cf6;
  --pink:#ff4fd8;
  --text:#eaf0ff;
  --muted:#9aa8c7;
  --grad:linear-gradient(120deg,#22e0ff 0%,#8b5cf6 50%,#ff4fd8 100%);
  --radius:16px;
  --shadow:0 12px 40px rgba(20,60,160,0.28);
  --maxw:1200px;
}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.7;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;}
img{max-width:100%;height:auto;display:block;}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px;}
section{padding:80px 0;position:relative;}
.bg-glow{position:fixed;inset:0;z-index:-2;pointer-events:none;
  background:
   radial-gradient(600px 400px at 12% 8%,rgba(34,224,255,0.14),transparent 60%),
   radial-gradient(700px 500px at 88% 15%,rgba(139,92,246,0.16),transparent 60%),
   radial-gradient(600px 500px at 50% 95%,rgba(255,79,216,0.10),transparent 60%),
   var(--bg);}
.grid-lines{position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:0.5;
  background-image:linear-gradient(rgba(120,160,255,0.05) 1px,transparent 1px),linear-gradient(90deg,rgba(120,160,255,0.05) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(circle at 50% 30%,#000 0%,transparent 75%);
  -webkit-mask-image:radial-gradient(circle at 50% 30%,#000 0%,transparent 75%);}
.eyebrow{display:inline-block;font-size:13px;letter-spacing:2px;color:var(--cyan);
  padding:6px 14px;border:1px solid rgba(34,224,255,0.35);border-radius:999px;
  background:rgba(34,224,255,0.06);margin-bottom:18px;}
h2.sec-title{font-size:clamp(24px,3vw,38px);font-weight:800;line-height:1.3;
  background:linear-gradient(90deg,#fff,#a8c6ff 60%,#d9b3ff);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;}
.sec-desc{color:var(--muted);max-width:760px;margin-top:14px;font-size:15.5px;}
.sec-head{margin-bottom:46px;}
.text-grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;}

/* NAV */
header.nav{position:sticky;top:0;z-index:100;backdrop-filter:blur(14px);
  background:rgba(7,11,24,0.82);border-bottom:1px solid var(--line);}
.nav-inner{display:flex;align-items:center;gap:20px;height:70px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand .ai-page-logo{height:38px;width:auto;}
.brand-name{font-weight:800;font-size:18px;letter-spacing:1px;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;white-space:nowrap;}
.nav-links{display:flex;align-items:center;gap:0;margin-left:auto;flex-wrap:nowrap;}
.nav-links a{font-size:14px;color:var(--muted);padding:10px 12px;border-radius:8px;transition:.25s;white-space:nowrap;position:relative;}
.nav-links a:hover{color:#fff;background:rgba(120,160,255,0.10);}
.nav-links a.active{color:var(--cyan);}
.nav-cta{margin-left:14px;padding:9px 20px;border-radius:999px;font-size:14px;font-weight:700;
  color:#04101f;background:var(--grad);box-shadow:0 6px 22px rgba(34,224,255,0.3);transition:.25s;white-space:nowrap;flex-shrink:0;}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 10px 28px rgba(139,92,246,0.45);}
.nav-toggle{display:none;margin-left:auto;background:none;border:1px solid var(--line);color:#fff;
  width:42px;height:42px;border-radius:10px;font-size:20px;cursor:pointer;}
.mobile-menu{display:none;flex-direction:column;padding:8px 20px 18px;background:rgba(7,11,24,0.98);border-bottom:1px solid var(--line);}
.mobile-menu.open{display:flex;}
.mobile-menu a{padding:12px 6px;color:var(--muted);border-bottom:1px solid rgba(120,160,255,0.08);font-size:15px;}
.mobile-menu a:hover{color:var(--cyan);}

/* HERO */
.hero{padding:90px 0 70px;overflow:hidden;}
.hero-inner{display:grid;grid-template-columns:1.15fr 0.85fr;gap:50px;align-items:center;}
.hero h1{font-size:clamp(30px,4.6vw,56px);font-weight:900;line-height:1.18;letter-spacing:1px;}
.hero .lead{margin-top:22px;color:var(--muted);font-size:16.5px;max-width:560px;}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
.hero-badges span{font-size:13px;padding:7px 14px;border-radius:999px;border:1px solid var(--line);
  background:rgba(34,224,255,0.06);color:#bfe0ff;}
.hero-actions{display:flex;gap:16px;margin-top:34px;flex-wrap:wrap;}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 30px;border-radius:999px;
  font-size:15.5px;font-weight:700;cursor:pointer;transition:.28s;border:none;font-family:inherit;}
.btn-primary{color:#04101f;background:var(--grad);box-shadow:0 10px 30px rgba(34,224,255,0.32);}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 16px 40px rgba(139,92,246,0.5);}
.btn-ghost{color:#eaf0ff;background:transparent;border:1px solid rgba(120,160,255,0.4);}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan);transform:translateY(-3px);}
.hero-panel{position:relative;display:flex;flex-direction:column;gap:16px;}
.hero-node{border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;
  background:var(--panel);backdrop-filter:blur(10px);box-shadow:var(--shadow);
  animation:float 6s ease-in-out infinite;display:flex;align-items:center;gap:16px;}
.hero-node:nth-child(2){animation-delay:1.2s;margin-left:26px;}
.hero-node:nth-child(3){animation-delay:2.4s;}
.hero-node .ico{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;flex-shrink:0;
  background:linear-gradient(135deg,rgba(34,224,255,0.2),rgba(139,92,246,0.24));color:var(--cyan);}
.hero-node b{font-size:15.5px;display:block;}
.hero-node small{color:var(--muted);font-size:13px;}
@keyframes float{0%,100%{transform:translateY(0);}50%{transform:translateY(-10px);}}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:64px;}
.stat-card{border:1px solid var(--line);border-radius:var(--radius);padding:24px 20px;text-align:center;
  background:var(--panel);transition:.3s;}
.stat-card:hover{transform:translateY(-6px);border-color:rgba(34,224,255,0.4);box-shadow:var(--shadow);}
.stat-card .num{font-size:30px;font-weight:900;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;}
.stat-card .lbl{color:var(--muted);font-size:13.5px;margin-top:6px;}

/* CARDS */
.grid{display:grid;gap:22px;}
.g3{grid-template-columns:repeat(3,1fr);}
.g2{grid-template-columns:repeat(2,1fr);}
.g4{grid-template-columns:repeat(4,1fr);}
.card{border:1px solid var(--line);border-radius:var(--radius);padding:26px;background:var(--panel);
  transition:.3s;position:relative;overflow:hidden;}
.card:hover{transform:translateY(-7px);border-color:rgba(34,224,255,0.42);box-shadow:var(--shadow);}
.card::before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--grad);opacity:0;transition:.3s;}
.card:hover::before{opacity:1;}
.card h3{font-size:17.5px;margin-bottom:10px;font-weight:700;}
.card p{color:var(--muted);font-size:14.3px;}
.card .ico-box{width:50px;height:50px;border-radius:13px;display:grid;place-items:center;margin-bottom:16px;
  background:linear-gradient(135deg,rgba(34,224,255,0.16),rgba(255,79,216,0.14));color:var(--cyan);}
.card .ico-box svg{width:24px;height:24px;}

/* ABOUT */
.about-wrap{display:grid;grid-template-columns:1fr 1fr;gap:46px;align-items:center;}
.about-feats{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:26px;}
.about-feats div{padding:16px 18px;border:1px solid var(--line);border-radius:12px;background:rgba(18,24,48,0.5);font-size:14px;}
.about-feats div b{color:var(--cyan);display:block;font-size:15px;margin-bottom:4px;}
.about-visual{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
.about-visual img{border-radius:14px;border:1px solid var(--line);box-shadow:var(--shadow);}
.about-visual img:first-child{grid-column:span 2;}

/* STEPS / TIMELINE */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;}
.step{position:relative;padding:26px 18px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);transition:.3s;}
.step:hover{transform:translateY(-6px);border-color:rgba(139,92,246,0.5);}
.step .n{font-size:38px;font-weight:900;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;line-height:1;}
.step b{display:block;margin:12px 0 6px;font-size:15.5px;}
.step span{color:var(--muted);font-size:13.5px;}

/* TABLE */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:rgba(10,15,34,0.6);}
table{width:100%;border-collapse:collapse;min-width:720px;}
th,td{padding:16px 18px;text-align:left;font-size:14.3px;border-bottom:1px solid rgba(120,160,255,0.10);}
th{background:rgba(139,92,246,0.14);color:#cfe3ff;font-weight:700;white-space:nowrap;}
td{color:var(--muted);}
tr:last-child td{border-bottom:none;}
td:first-child{color:#eaf0ff;font-weight:600;}
tr:hover td{background:rgba(34,224,255,0.04);}
.badge-good{color:#22e0ff;font-weight:700;}
.rating-box{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:34px;}
.rating-card{border:1px solid rgba(34,224,255,0.3);border-radius:var(--radius);padding:28px;text-align:center;
  background:linear-gradient(160deg,rgba(34,224,255,0.10),rgba(139,92,246,0.10));}
.rating-card .big{font-size:44px;font-weight:900;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;}
.rating-card p{color:var(--muted);font-size:14px;margin-top:6px;}
.stars{color:#ffd54a;font-size:20px;letter-spacing:3px;margin-top:8px;}

/* COMMENT */
.comment{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.c-card{border:1px solid var(--line);border-radius:var(--radius);padding:26px;background:var(--panel);transition:.3s;}
.c-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:rgba(34,224,255,0.4);}
.c-top{display:flex;align-items:center;gap:14px;margin-bottom:14px;}
.avatar{width:48px;height:48px;border-radius:50%;display:grid;place-items:center;font-weight:800;font-size:16px;color:#04101f;
  background:linear-gradient(135deg,#22e0ff,#8b5cf6);flex-shrink:0;}
.c-top b{font-size:15px;}
.c-top small{display:block;color:var(--muted);font-size:12.5px;}
.c-card p{color:var(--muted);font-size:14.2px;}
.c-card .c-star{color:#ffd54a;font-size:14px;margin-top:12px;letter-spacing:2px;}

/* FAQ */
.faq-item{border:1px solid var(--line);border-radius:12px;margin-bottom:14px;overflow:hidden;background:rgba(18,24,48,0.5);}
.faq-q{display:flex;justify-content:space-between;align-items:center;padding:18px 22px;cursor:pointer;font-weight:600;font-size:15.5px;transition:.25s;}
.faq-q:hover{color:var(--cyan);}
.faq-q .plus{font-size:22px;color:var(--cyan);transition:.3s;line-height:1;}
.faq-item.open .plus{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease;color:var(--muted);font-size:14.4px;}
.faq-a p{padding:0 22px 20px;}

/* FORM */
.form-wrap{display:grid;grid-template-columns:0.9fr 1.1fr;gap:40px;align-items:start;}
.form-card{border:1px solid var(--line);border-radius:var(--radius);padding:34px;background:var(--panel);box-shadow:var(--shadow);}
.field{margin-bottom:18px;}
.field label{display:block;font-size:14px;margin-bottom:8px;color:#cfe3ff;}
.field input,.field select,.field textarea{width:100%;padding:13px 16px;border-radius:10px;border:1px solid var(--line);
  background:rgba(7,11,24,0.7);color:#eaf0ff;font-size:14.5px;font-family:inherit;transition:.25s;outline:none;}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--cyan);box-shadow:0 0 0 3px rgba(34,224,255,0.14);}
.field textarea{resize:vertical;min-height:110px;}
.form-card .btn{width:100%;margin-top:8px;}
.contact-info{display:flex;flex-direction:column;gap:16px;}
.ci-item{display:flex;align-items:center;gap:14px;padding:16px 20px;border:1px solid var(--line);border-radius:12px;background:rgba(18,24,48,0.5);}
.ci-item .lab{color:var(--muted);font-size:13px;display:block;}
.ci-item .val{font-weight:700;font-size:15px;}

/* IMAGES */
.img-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-top:16px;}
.img-grid img{border-radius:14px;border:1px solid var(--line);}
.promo-imgs{display:grid;grid-template-columns:1fr 1fr;gap:18px;}

/* TAG CLOUD */
.tags{display:flex;flex-wrap:wrap;gap:10px;}
.tags span{padding:8px 16px;border-radius:999px;border:1px solid var(--line);font-size:13px;color:#bfe0ff;
  background:rgba(34,224,255,0.05);transition:.25s;}
.tags span:hover{background:var(--grad);color:#04101f;border-color:transparent;}

/* PRICE */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.price-card{border:1px solid var(--line);border-radius:var(--radius);padding:32px;background:var(--panel);transition:.3s;text-align:center;}
.price-card.featured{border-color:rgba(34,224,255,0.5);box-shadow:var(--shadow);}
.price-card:hover{transform:translateY(-8px);}
.price-card .p-name{font-size:17px;font-weight:700;margin-bottom:6px;}
.price-card .p-price{font-size:34px;font-weight:900;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;margin:14px 0;}
.price-card .p-price small{font-size:14px;font-weight:400;color:var(--muted);-webkit-text-fill-color:var(--muted);}
.price-card ul{list-style:none;margin:18px 0;text-align:left;}
.price-card li{color:var(--muted);font-size:14px;padding:7px 0;border-bottom:1px solid rgba(120,160,255,0.07);}
.price-card li::before{content:"✓";color:var(--cyan);margin-right:8px;font-weight:800;}

/* NETWORK */
.network{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}
.network div{padding:20px;border:1px solid var(--line);border-radius:12px;background:rgba(18,24,48,0.5);}
.network b{display:block;color:var(--cyan);font-size:15px;margin-bottom:4px;}
.network span{color:var(--muted);font-size:13.5px;}

/* ARTICLES */
.article-list{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.article{border:1px solid var(--line);border-radius:var(--radius);padding:24px;background:var(--panel);transition:.3s;}
.article:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:rgba(139,92,246,0.45);}
.article .a-tag{font-size:12px;color:var(--cyan);border:1px solid rgba(34,224,255,0.3);padding:3px 10px;border-radius:999px;}
.article h4{font-size:16px;margin:14px 0 8px;}
.article p{color:var(--muted);font-size:13.8px;}
.article a.more{display:inline-block;margin-top:14px;color:var(--cyan);font-size:13.5px;font-weight:600;}

/* FOOTER */
footer{border-top:1px solid var(--line);padding:64px 0 30px;background:rgba(4,7,18,0.9);}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:36px;}
footer h5{font-size:15px;margin-bottom:16px;color:#fff;}
footer p,footer a{color:var(--muted);font-size:13.7px;display:block;margin-bottom:8px;transition:.25s;}
footer a:hover{color:var(--cyan);}
.foot-links a{padding:2px 0;}
.foot-bottom{margin-top:44px;padding-top:24px;border-top:1px solid var(--line);text-align:center;color:var(--muted);font-size:13px;}
.qr-box{display:flex;flex-direction:column;gap:10px;}
.qr-box img{width:130px;border-radius:10px;border:1px solid var(--line);}

/* FLOAT */
.fab{position:fixed;right:22px;bottom:26px;z-index:120;display:flex;flex-direction:column;gap:12px;}
.fab button,.fab a{width:52px;height:52px;border-radius:50%;border:none;cursor:pointer;display:grid;place-items:center;
  background:linear-gradient(135deg,#22e0ff,#8b5cf6);color:#04101f;font-weight:800;box-shadow:0 8px 24px rgba(34,224,255,0.35);transition:.28s;}
.fab button:hover,.fab a:hover{transform:translateY(-4px) scale(1.05);}
#backTop{opacity:0;pointer-events:none;background:rgba(18,24,48,0.9);color:#fff;border:1px solid var(--line);}
#backTop.show{opacity:1;pointer-events:auto;}
.kefu-pop{position:fixed;right:22px;bottom:92px;z-index:130;background:#0d1330;border:1px solid var(--line);border-radius:16px;padding:16px;display:none;box-shadow:var(--shadow);}
.kefu-pop.show{display:block;}
.kefu-pop img{width:180px;border-radius:10px;}
.kefu-pop p{font-size:12.5px;color:var(--muted);text-align:center;margin-top:8px;}

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

@media (max-width:1024px){
  .nav-links{display:none;}
  .nav-cta{display:none;}
  .nav-toggle{display:block;}
  .hero-inner{grid-template-columns:1fr;gap:40px;}
  .about-wrap{grid-template-columns:1fr;}
  .g3,.g4,.comment,.steps,.network,.article-list,.price-grid,.rating-box{grid-template-columns:repeat(2,1fr);}
  .form-wrap{grid-template-columns:1fr;}
  .foot-grid{grid-template-columns:1fr 1fr;}
  .hero-stats{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:640px){
  section{padding:56px 0;}
  .g3,.g4,.g2,.comment,.steps,.network,.article-list,.price-grid,.rating-box,.hero-stats,.about-feats,.about-visual,.img-grid,.promo-imgs{grid-template-columns:1fr;}
  .hero{padding:56px 0 40px;}
  .foot-grid{grid-template-columns:1fr;}
  .hero-actions .btn{width:100%;}
  .hero-node:nth-child(2){margin-left:0;}
  .brand-name{font-size:16px;}
}