:root{
  --primary:#2b5cff;
  --primary-dark:#1b3fd0;
  --accent:#00d1b2;
  --accent2:#ff6b3d;
  --ink:#0c1633;
  --ink-2:#3a4460;
  --muted:#6b7590;
  --bg:#f5f7ff;
  --card:#ffffff;
  --line:#e6ebf7;
  --radius:18px;
  --shadow:0 10px 30px rgba(20,40,120,.08);
  --shadow-hover:0 18px 44px rgba(20,40,120,.16);
}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased;
}
a{text-decoration:none;color:inherit;}
img{max-width:100%;height:auto;display:block;}
.container{max-width:1200px;margin:0 auto;padding:0 24px;}
section{scroll-margin-top:80px;}
.sec{padding:72px 0;}
.sec.alt{background:#fff;}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:2px;
  color:var(--primary);background:rgba(43,92,255,.08);
  padding:6px 14px;border-radius:999px;margin-bottom:16px;
}
h2.sec-title{font-size:clamp(24px,3.4vw,38px);font-weight:800;letter-spacing:.5px;line-height:1.3;margin-bottom:12px;}
.sec-sub{color:var(--muted);font-size:16px;max-width:760px;margin-bottom:40px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 28px;border-radius:999px;font-weight:700;font-size:15px;
  border:none;cursor:pointer;transition:.25s;white-space:nowrap;
}
.btn-primary{background:linear-gradient(135deg,var(--primary),#4d7bff);color:#fff;box-shadow:0 8px 22px rgba(43,92,255,.35);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(43,92,255,.5);}
.btn-accent{background:linear-gradient(135deg,var(--accent),#22e0c4);color:#04302b;box-shadow:0 8px 22px rgba(0,209,178,.35);}
.btn-accent:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(0,209,178,.5);}
.btn-ghost{background:#fff;color:var(--primary);border:1.5px solid var(--primary);}
.btn-ghost:hover{background:var(--primary);color:#fff;transform:translateY(-2px);}
.btn:active{transform:translateY(0) scale(.98);}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);
  backdrop-filter:blur(12px);border-bottom:1px solid var(--line);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:68px;gap:16px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.ai-page-logo{max-height:42px;width:auto;}
.nav-links{display:flex;align-items:center;gap:0;list-style:none;flex-wrap:nowrap;overflow:hidden;}
.nav-links li{list-style:none;}
.nav-links a{
  display:block;padding:8px 13px;font-size:14px;font-weight:600;color:var(--ink-2);
  border-radius:10px;transition:.2s;white-space:nowrap;
}
.nav-links a:hover{color:var(--primary);background:rgba(43,92,255,.07);}
.nav-cta{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.nav-cta .btn{padding:10px 20px;font-size:14px;}
.hamburger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px;}
.hamburger span{width:24px;height:2.5px;background:var(--ink);border-radius:2px;transition:.3s;}
.mobile-menu{display:none;background:#fff;border-bottom:1px solid var(--line);padding:10px 24px 20px;}
.mobile-menu.open{display:block;}
.mobile-menu a{display:block;padding:11px 6px;font-weight:600;color:var(--ink-2);border-bottom:1px solid var(--line);}
.mobile-menu a:last-child{border-bottom:none;}

/* ---------- Hero (NO images) ---------- */
.hero{
  position:relative;overflow:hidden;
  background:radial-gradient(circle at 15% 20%,#e7edff 0%,transparent 45%),
             radial-gradient(circle at 85% 10%,#e0fbf5 0%,transparent 40%),
             linear-gradient(160deg,#0b1a4d 0%,#122a7a 45%,#1e3fbf 100%);
  color:#fff;padding:88px 0 96px;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:44px 44px;pointer-events:none;
}
.hero::after{
  content:"";position:absolute;width:520px;height:520px;border-radius:50%;
  right:-140px;top:-160px;background:radial-gradient(circle,rgba(0,209,178,.35),transparent 70%);
  filter:blur(30px);pointer-events:none;animation:floaty 9s ease-in-out infinite;
}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(24px)}}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center;}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;
  padding:7px 16px;border-radius:999px;background:rgba(0,209,178,.16);
  border:1px solid rgba(0,209,178,.4);color:#7ffbe6;margin-bottom:22px;letter-spacing:1px;
}
.hero-badge i{width:8px;height:8px;border-radius:50%;background:var(--accent);display:inline-block;animation:pulse 1.6s infinite;}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.4;transform:scale(1.4)}}
.hero h1{font-size:clamp(30px,4.2vw,50px);font-weight:800;line-height:1.2;letter-spacing:1px;margin-bottom:20px;}
.hero h1 em{font-style:normal;background:linear-gradient(90deg,#7ffbe6,#a9c1ff);-webkit-background-clip:text;background-clip:text;color:transparent;}
.hero p.lead{font-size:17px;color:#c9d6ff;max-width:560px;margin-bottom:14px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:28px;}
.hero-tags span{
  font-size:13px;padding:5px 13px;border-radius:999px;font-weight:600;
  background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.16);color:#dbe4ff;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px;}
.hero-actions .btn{padding:15px 34px;font-size:16px;}
.hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;max-width:560px;}
.hstat{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);border-radius:14px;padding:14px 16px;}
.hstat b{display:block;font-size:24px;font-weight:800;color:#7ffbe6;}
.hstat small{color:#b9c6f2;font-size:12.5px;}
.hero-panel{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.16);
  border-radius:22px;padding:26px;backdrop-filter:blur(6px);
  display:grid;gap:12px;
}
.hp-row{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);
  border-radius:12px;padding:12px 16px;font-size:14px;animation:rise .7s both;
}
.hp-row:nth-child(2){animation-delay:.1s}
.hp-row:nth-child(3){animation-delay:.2s}
.hp-row:nth-child(4){animation-delay:.3s}
.hp-row:nth-child(5){animation-delay:.4s}
@keyframes rise{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}
.hp-row .dot{width:9px;height:9px;border-radius:50%;background:var(--accent);flex-shrink:0;}
.hp-row .name{flex:1;color:#e3ebff;font-weight:600;}
.hp-row .val{color:#7ffbe6;font-weight:800;font-size:13px;}
.hero-panel .hp-title{font-size:13px;color:#aebdf0;letter-spacing:1px;font-weight:700;margin-bottom:2px;}

/* ---------- Stats strip ---------- */
.stat-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:-46px;position:relative;z-index:5;}
.stat-card{background:#fff;border-radius:var(--radius);padding:26px 22px;box-shadow:var(--shadow);border:1px solid var(--line);transition:.3s;text-align:center;}
.stat-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);}
.stat-card b{font-size:32px;font-weight:800;background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent;display:block;}
.stat-card span{font-size:14px;color:var(--muted);font-weight:600;}

/* ---------- Cards & grids ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 26px;transition:.3s;box-shadow:0 4px 14px rgba(20,40,120,.04);
}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:rgba(43,92,255,.25);}
.card .ico{
  width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(43,92,255,.12),rgba(0,209,178,.12));
  color:var(--primary);font-size:22px;font-weight:800;margin-bottom:18px;
}
.card h3{font-size:18px;font-weight:800;margin-bottom:10px;}
.card p{color:var(--muted);font-size:14.5px;}
.scene-list{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;}
.scene{
  background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px 22px;
  transition:.3s;position:relative;overflow:hidden;
}
.scene::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:linear-gradient(180deg,var(--primary),var(--accent));transform:scaleY(0);transform-origin:top;transition:.3s;}
.scene:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
.scene:hover::before{transform:scaleY(1);}
.scene h4{font-size:16px;font-weight:800;margin-bottom:8px;display:flex;align-items:center;gap:8px;}
.scene h4 .tag{font-size:11px;padding:2px 8px;border-radius:6px;background:rgba(0,209,178,.14);color:#0b8c79;font-weight:700;}
.scene p{font-size:13.8px;color:var(--muted);}

/* ---------- chips / tag cloud ---------- */
.chips{display:flex;flex-wrap:wrap;gap:10px;}
.chip{
  font-size:13.5px;font-weight:600;padding:8px 15px;border-radius:999px;
  background:#fff;border:1px solid var(--line);color:var(--ink-2);transition:.25s;
}
.chip:hover{background:var(--primary);color:#fff;border-color:var(--primary);transform:translateY(-2px);}

/* ---------- flow / steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step;}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 24px;position:relative;transition:.3s;}
.step:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);}
.step .num{
  width:44px;height:44px;border-radius:12px;background:linear-gradient(135deg,var(--primary),#6b8dff);
  color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center;font-size:18px;margin-bottom:16px;
}
.step h4{font-size:16px;font-weight:800;margin-bottom:8px;}
.step p{font-size:14px;color:var(--muted);}

/* ---------- table ---------- */
.table-wrap{overflow-x:auto;background:#fff;border-radius:var(--radius);border:1px solid var(--line);box-shadow:var(--shadow);}
table{width:100%;border-collapse:collapse;min-width:720px;}
th,td{padding:15px 18px;text-align:left;font-size:14.5px;border-bottom:1px solid var(--line);}
thead th{background:linear-gradient(135deg,#f0f4ff,#eafaf7);font-weight:800;color:var(--ink);font-size:14px;}
tbody tr:hover{background:#f8faff;}
td.good{color:#0b8c79;font-weight:700;}
td.mid{color:var(--muted);}
.rating-box{display:flex;flex-wrap:wrap;gap:24px;align-items:center;justify-content:space-between;background:linear-gradient(135deg,#0b1a4d,#1e3fbf);border-radius:var(--radius);padding:34px 36px;color:#fff;margin-bottom:34px;}
.rating-score{display:flex;align-items:baseline;gap:10px;}
.rating-score b{font-size:56px;font-weight:800;line-height:1;background:linear-gradient(135deg,#7ffbe6,#a9c1ff);-webkit-background-clip:text;background-clip:text;color:transparent;}
.rating-score span{color:#b9c6f2;font-size:16px;}
.stars{font-size:24px;color:#ffc93c;letter-spacing:3px;}
.rating-box p{color:#c9d6ff;font-size:14px;max-width:520px;}

/* ---------- timeline ---------- */
.timeline{position:relative;padding-left:32px;}
.timeline::before{content:"";position:absolute;left:9px;top:4px;bottom:4px;width:2px;background:linear-gradient(180deg,var(--primary),var(--accent));}
.tl-item{position:relative;margin-bottom:26px;}
.tl-item::before{content:"";position:absolute;left:-30px;top:5px;width:14px;height:14px;border-radius:50%;background:#fff;border:3px solid var(--primary);}
.tl-item h4{font-size:16px;font-weight:800;margin-bottom:4px;}
.tl-item p{font-size:14px;color:var(--muted);}

/* ---------- comments ---------- */
.comment{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.3s;}
.comment:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);}
.comment .q{color:var(--accent2);font-size:28px;font-weight:800;line-height:1;margin-bottom:10px;}
.comment p{font-size:14.5px;color:var(--ink-2);margin-bottom:18px;}
.comment .who{display:flex;align-items:center;gap:12px;}
.avatar{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:16px;}
.who b{display:block;font-size:14.5px;}
.who small{color:var(--muted);font-size:12.5px;}

/* ---------- cases / images ---------- */
.case-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;}
.case{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.3s;}
.case:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);}
.case .imgbox{aspect-ratio:16/9;overflow:hidden;background:#e9eefc;}
.case .imgbox img{width:100%;height:100%;object-fit:cover;transition:.4s;}
.case:hover .imgbox img{transform:scale(1.05);}
.case .body{padding:22px 24px;}
.case .body h4{font-size:17px;font-weight:800;margin-bottom:8px;}
.case .body p{font-size:14px;color:var(--muted);}
.square-img{aspect-ratio:1/1;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);}
.square-img img{width:100%;height:100%;object-fit:cover;}

/* ---------- articles ---------- */
.article{display:flex;gap:18px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;transition:.3s;}
.article:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(43,92,255,.25);}
.article .idx{font-size:26px;font-weight:800;color:rgba(43,92,255,.25);line-height:1;flex-shrink:0;}
.article h4{font-size:16px;font-weight:700;margin-bottom:6px;}
.article p{font-size:13.5px;color:var(--muted);}
.article a.more{font-size:13px;font-weight:700;color:var(--primary);margin-top:8px;display:inline-block;}
.article a.more:hover{text-decoration:underline;}

/* ---------- form ---------- */
.form-card{background:#fff;border:1px solid var(--line);border-radius:24px;padding:40px;box-shadow:var(--shadow);}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
.field{display:flex;flex-direction:column;gap:8px;}
.field.full{grid-column:1/-1;}
.field label{font-size:14px;font-weight:700;color:var(--ink-2);}
.field input,.field select,.field textarea{
  font-family:inherit;font-size:14.5px;padding:13px 16px;border-radius:12px;
  border:1.5px solid var(--line);background:#fafbff;color:var(--ink);transition:.2s;width:100%;
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--primary);background:#fff;box-shadow:0 0 0 4px rgba(43,92,255,.1);
}
.field textarea{resize:vertical;min-height:110px;}
.form-actions{margin-top:24px;display:flex;align-items:center;gap:16px;flex-wrap:wrap;}
.form-note{font-size:13px;color:var(--muted);}

/* ---------- FAQ ---------- */
.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;margin-bottom:14px;overflow:hidden;transition:.25s;}
.faq-item:hover{border-color:rgba(43,92,255,.3);}
.faq-q{width:100%;text-align:left;background:none;border:none;padding:20px 24px;font-size:16px;font-weight:700;color:var(--ink);cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:16px;font-family:inherit;}
.faq-q .icon{font-size:22px;color:var(--primary);transition:.3s;flex-shrink:0;line-height:1;}
.faq-item.open .faq-q .icon{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease;}
.faq-a p{padding:0 24px 22px;font-size:14.5px;color:var(--muted);}

/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:start;}
.contact-info{display:grid;gap:16px;}
.ci{display:flex;gap:16px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px 22px;align-items:center;transition:.3s;}
.ci:hover{box-shadow:var(--shadow-hover);transform:translateY(-3px);}
.ci .ci-ico{width:46px;height:46px;border-radius:12px;background:linear-gradient(135deg,rgba(43,92,255,.12),rgba(0,209,178,.12));display:flex;align-items:center;justify-content:center;font-weight:800;color:var(--primary);flex-shrink:0;}
.ci b{display:block;font-size:14.5px;}
.ci span{font-size:13.5px;color:var(--muted);word-break:break-all;}
.qr-box{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px;text-align:center;}
.qr-box img{width:150px;margin:0 auto 12px;border-radius:10px;}
.qr-box p{font-size:13.5px;color:var(--muted);}

/* ---------- footer ---------- */
.site-footer{background:#0a1533;color:#c3cdec;padding:60px 0 26px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:34px;margin-bottom:40px;}
.footer-grid h5{color:#fff;font-size:15px;font-weight:800;margin-bottom:16px;letter-spacing:.5px;}
.footer-grid a,.footer-grid p{display:block;font-size:13.5px;color:#9aa8d0;margin-bottom:9px;transition:.2s;}
.footer-grid a:hover{color:#7ffbe6;}
.footer-brand p{max-width:280px;line-height:1.8;}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:24px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:13px;color:#8694bd;}
.footer-friend{display:flex;flex-wrap:wrap;gap:10px 18px;margin-bottom:24px;}
.footer-friend a{font-size:13px;color:#9aa8d0;}
.footer-friend a:hover{color:#7ffbe6;}

/* ---------- floating ---------- */
.float-cs{position:fixed;right:22px;bottom:84px;z-index:99;display:flex;flex-direction:column;gap:12px;align-items:flex-end;}
.cs-btn{width:54px;height:54px;border-radius:50%;background:linear-gradient(135deg,var(--primary),#4d7bff);color:#fff;display:flex;align-items:center;justify-content:center;font-size:22px;box-shadow:0 10px 26px rgba(43,92,255,.45);cursor:pointer;border:none;transition:.3s;animation:bob 2.6s ease-in-out infinite;}
.cs-btn:hover{transform:scale(1.08);}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(-6px)}}
.cs-pop{display:none;background:#fff;border-radius:16px;box-shadow:var(--shadow-hover);padding:16px;text-align:center;border:1px solid var(--line);}
.cs-pop.show{display:block;}
.cs-pop img{width:140px;border-radius:8px;margin:0 auto 8px;}
.cs-pop p{font-size:12.5px;color:var(--muted);}
.back-top{position:fixed;right:22px;bottom:22px;z-index:99;width:46px;height:46px;border-radius:50%;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);display:none;align-items:center;justify-content:center;cursor:pointer;font-size:18px;color:var(--primary);transition:.3s;}
.back-top:hover{background:var(--primary);color:#fff;}
.back-top.show{display:flex;}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease;}
.reveal.in{opacity:1;transform:translateY(0);}

/* ---------- responsive ---------- */
@media(max-width:1080px){
  .nav-links{display:none;}
  .hamburger{display:flex;}
  .nav-cta .btn-ghost{display:none;}
  .hero-inner{grid-template-columns:1fr;}
  .hero-panel{max-width:560px;}
  .stat-cards{grid-template-columns:repeat(2,1fr);}
  .grid-3{grid-template-columns:repeat(2,1fr);}
  .steps{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .contact-grid{grid-template-columns:1fr;}
}
@media(max-width:720px){
  .sec{padding:52px 0;}
  .container{padding:0 18px;}
  .hero{padding:60px 0 80px;}
  .hero-actions .btn{width:100%;}
  .hero-stats{grid-template-columns:1fr 1fr;}
  .stat-cards{grid-template-columns:1fr 1fr;gap:14px;margin-top:-36px;}
  .stat-card{padding:20px 14px;}
  .stat-card b{font-size:26px;}
  .grid-3,.grid-2,.scene-list,.case-grid,.form-grid,.footer-grid{grid-template-columns:1fr;}
  .steps{grid-template-columns:1fr;}
  .rating-box{padding:26px 22px;}
  .rating-score b{font-size:44px;}
  .form-card{padding:26px 20px;}
  .hero-panel{padding:20px;}
  .float-cs{right:14px;bottom:76px;}
  .back-top{right:14px;bottom:18px;}
  .footer-bottom{flex-direction:column;}
}