:root{
  --brand-50:#ECF3FB;--brand-100:#CFE1F6;--brand-200:#A4C6EC;--brand-300:#6EA1DD;
  --brand-400:#3F7ECB;--brand-500:#2064AE;--brand-600:#1A56A0;--brand-700:#143F76;
  --brand-800:#0F3055;--brand-900:#0A2138;
  --surface-0:#F5F7FA;--surface-1:#EEF1F5;--surface-2:#FFFFFF;
  --border:#E2E7EE;--border-strong:#C9D2DD;
  --text-primary:#101827;--text-secondary:#566173;--text-muted:#8A94A6;
  --status-info:#0E8AA0;--status-info-bg:#E4F6F9;--status-info-fg:#0B4F5C;
  --sans:"Raleway","PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,Arial,sans-serif;
  --maxw:1200px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--sans);background:var(--surface-0);color:var(--text-primary);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 32px}

/* ── NAV ── */
header.nav{position:fixed;top:0;left:0;right:0;z-index:100;height:68px;background:transparent;transition:background .35s,box-shadow .35s,border-color .35s}
header.nav.scrolled{background:rgba(245,247,250,.96);backdrop-filter:saturate(160%) blur(14px);border-bottom:1px solid var(--border);box-shadow:0 1px 8px rgba(16,24,39,.07)}
.nav-inner{display:flex;align-items:center;height:68px;gap:0}
.logo{display:flex;align-items:center;flex:0 0 auto;margin-right:auto}
.logo img{height:30px;width:auto;display:block;transition:opacity .2s}
.logo .logo-white{display:block}.logo .logo-dark{display:none}
header.nav.scrolled .logo .logo-white{display:none}
header.nav.scrolled .logo .logo-dark{display:block}
.nav-links{display:flex;gap:0;font-size:14.5px;font-weight:600;align-items:center;list-style:none;padding:0;margin:0 28px}
.nav-links li{position:relative}
.nav-links li a{display:inline-flex;align-items:center;gap:5px;padding:6px 13px;color:rgba(255,255,255,.9);transition:color .15s;white-space:nowrap}
.nav-links li a:hover{color:#fff}
header.nav.scrolled .nav-links li a{color:var(--text-secondary)}
header.nav.scrolled .nav-links li a:hover{color:var(--brand-600)}
.has-dd .caret{width:7px;height:7px;border-right:1.8px solid currentColor;border-bottom:1.8px solid currentColor;transform:rotate(45deg) translateY(-2px);transition:transform .18s;display:inline-block}
.has-dd:hover .caret,.has-dd:focus-within .caret{transform:rotate(225deg) translateY(0)}
.dd-menu{position:absolute;top:calc(100% + 8px);left:50%;transform:translateX(-50%) translateY(6px);background:#fff!important;border:1px solid var(--border);border-radius:12px;box-shadow:0 12px 40px -12px rgba(16,24,39,.24);padding:8px;min-width:180px;opacity:0;visibility:hidden;transition:opacity .16s,transform .16s,visibility .16s;z-index:200}
.has-dd:hover .dd-menu,.has-dd:focus-within .dd-menu{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.dd-menu a{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:8px;font-size:14px;color:var(--text-primary)!important;font-weight:500}
.dd-menu a:hover{background:var(--brand-50);color:var(--brand-700)}
.dd-menu a .ic{width:22px;height:22px;border-radius:6px;background:var(--brand-50);display:flex;align-items:center;justify-content:center;color:var(--brand-600);flex:0 0 22px}
.dd-menu a:hover .ic{background:var(--brand-100)}
.nav-cta{flex:0 0 auto}
.btn{display:inline-flex;align-items:center;gap:7px;font-weight:700;font-size:14px;padding:9px 18px;border-radius:7px;cursor:pointer;transition:all .16s;border:1.5px solid transparent;font-family:var(--sans)}
.btn-primary{background:var(--brand-600);color:#fff;border-color:var(--brand-600)}
.btn-primary:hover{background:var(--brand-700);border-color:var(--brand-700)}
.btn-outline-white{background:transparent;color:#fff;border-color:rgba(255,255,255,.7)}
.btn-outline-white:hover{background:rgba(255,255,255,.12);border-color:#fff}
header.nav.scrolled .btn-outline-white{color:var(--brand-700);border-color:var(--brand-200);background:transparent}
header.nav.scrolled .btn-outline-white:hover{background:var(--brand-50)}
.btn-lg{padding:13px 26px;font-size:15.5px;border-radius:8px}
.btn-ghost{color:var(--brand-700);border-color:var(--border-strong);background:transparent}
.btn-ghost:hover{border-color:var(--brand-400);color:var(--brand-600)}
.cta .btn-ghost{color:#fff;border-color:rgba(255,255,255,.4)}.cta .btn-ghost:hover{border-color:#fff}
.menu-toggle{display:none;background:none;border:none;cursor:pointer;padding:8px;color:#fff}
header.nav.scrolled .menu-toggle{color:var(--text-primary)}

/* ── HERO (full-bleed image, dark overlay, original Chinese copy) ── */
.hero{position:relative;overflow:hidden;min-height:100vh;display:flex;align-items:center;justify-content:center;text-align:center;color:#fff;padding-top:68px}
.hero::before{content:"";position:absolute;inset:0;background:url("images/hero.jpg") center 30%/cover no-repeat;z-index:0}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(29,23,36,.5),rgba(10,33,56,.72));z-index:1}
.hero .wrap{position:relative;z-index:2;max-width:860px}
.hero-zh-title{font-size:clamp(26px,3.8vw,46px);font-weight:800;line-height:1.28;letter-spacing:.04em;color:#fff;margin-bottom:18px;text-shadow:0 2px 20px rgba(0,0,0,.4)}
.hero-zh-sub{font-size:clamp(15px,2vw,19px);line-height:1.75;color:rgba(255,255,255,.88);margin-bottom:34px;text-shadow:0 1px 8px rgba(0,0,0,.25)}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;justify-content:center;margin-bottom:28px}
.hero-meta{display:flex;gap:22px;flex-wrap:wrap;justify-content:center;font-size:13px;color:rgba(255,255,255,.75)}
.hero-meta span{display:inline-flex;align-items:center;gap:6px}
.hero-meta svg{color:#8FC0F0}
.hero-scroll{position:absolute;bottom:28px;left:50%;transform:translateX(-50%);z-index:2;display:flex;flex-direction:column;align-items:center;gap:8px;color:rgba(255,255,255,.55);font-size:11.5px;letter-spacing:.06em}
.scroll-arrow{width:18px;height:18px;border-right:2px solid rgba(255,255,255,.45);border-bottom:2px solid rgba(255,255,255,.45);transform:rotate(45deg);animation:bounce 1.6s infinite}
@keyframes bounce{0%,100%{transform:rotate(45deg) translateY(0)}50%{transform:rotate(45deg) translateY(5px)}}

/* ── SECTION SCAFFOLD ── */
section{padding:72px 0}
.sec-head{max-width:720px;margin-bottom:44px}
.sec-eyebrow{font-size:12.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--brand-600);margin-bottom:12px}
h2.sec-title{font-size:clamp(26px,3vw,36px);line-height:1.16;letter-spacing:-.015em;font-weight:800;color:var(--text-primary);margin-bottom:14px}
.sec-lead{font-size:17px;color:var(--text-secondary);line-height:1.6}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}

/* ── SECTION 2: 2-col hero content (original design) ── */
.hero2{background:var(--surface-2);border-bottom:1px solid var(--border)}
.hero2-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--brand-700);background:var(--brand-50);border:1px solid var(--brand-100);padding:6px 13px;border-radius:100px;letter-spacing:.01em;margin-bottom:22px}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--status-info);box-shadow:0 0 0 3px var(--status-info-bg)}
h1.hero2-title{font-size:clamp(30px,3.8vw,50px);line-height:1.1;letter-spacing:-.022em;font-weight:800;color:var(--text-primary);margin-bottom:20px}
h1.hero2-title .accent{color:var(--brand-600)}
.hero2-sub{font-size:17px;line-height:1.65;color:var(--text-secondary);max-width:540px;margin-bottom:28px}
.hero2-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:28px}
.hero2-meta{display:flex;gap:20px;flex-wrap:wrap;font-size:13px;color:var(--text-muted)}
.hero2-meta span{display:inline-flex;align-items:center;gap:6px}
.hero2-meta svg{color:var(--brand-500)}

/* Agent diagram card */
.diagram{background:var(--surface-2);border:1px solid var(--border);border-radius:16px;box-shadow:0 1px 2px rgba(16,24,39,.04),0 12px 40px -12px rgba(16,24,39,.16);padding:20px}
.diagram-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.diagram-title{font-size:13px;font-weight:700;color:var(--text-primary);letter-spacing:.01em}
.diagram-legend{display:flex;gap:14px;font-size:11px;color:var(--text-muted)}
.diagram-legend i{width:8px;height:8px;border-radius:2px;display:inline-block;margin-right:5px;vertical-align:middle}
.svg-shell{width:100%;height:auto;display:block;border-radius:10px;background:linear-gradient(180deg,#FAFCFE,#F2F6FB)}
.node-label{font:600 11px var(--sans);fill:var(--text-secondary)}
.node-sub{font:500 9px var(--sans);fill:var(--text-muted)}
.agent-chip{font:700 9.5px var(--sans)}

/* ── PROOF STATS ── */
.proof{background:var(--brand-50);border-top:1px solid var(--border);border-bottom:1px solid var(--border);padding:52px 0}
.proof .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:28px}
.stat .big{font-size:clamp(32px,3.6vw,46px);font-weight:800;letter-spacing:-.02em;line-height:1;color:var(--brand-700)}
.stat .big .unit{font-size:.5em;font-weight:600;color:var(--brand-500);margin-left:2px}
.stat .lbl{margin-top:10px;font-size:14px;color:var(--text-secondary);line-height:1.45;max-width:230px}
.stat{padding-left:18px;border-left:3px solid var(--brand-400)}

/* ── CLIENTS ── */
.clients{background:var(--surface-2);border-top:1px solid var(--border);border-bottom:1px solid var(--border);padding:44px 0}
.clients .lead-k{text-align:center;font-size:13px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--text-muted);margin-bottom:26px}
.client-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:20px 16px;align-items:center;justify-items:center}
.client-grid a{display:flex;align-items:center;justify-content:center;height:60px;width:100%}
.client-grid img{max-width:100%;height:50px;width:auto;object-fit:contain;filter:grayscale(1);opacity:.68;transition:filter .2s,opacity .2s}
.client-grid a:hover img{filter:grayscale(0);opacity:1}

/* ── PILLARS ── */
.pillars{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.pillar{background:var(--surface-2);border:1px solid var(--border);border-radius:14px;padding:30px 28px;transition:border-color .18s,box-shadow .18s,transform .18s}
.pillar:hover{border-color:var(--brand-300);box-shadow:0 14px 40px -18px rgba(26,86,160,.4);transform:translateY(-2px)}
.pillar .tag{font-size:12px;font-weight:700;letter-spacing:.02em;padding:4px 10px;border-radius:6px;display:inline-block;margin-bottom:16px}
.tag-asset{color:var(--brand-700);background:var(--brand-50)}
.tag-commodity{color:var(--status-info-fg);background:var(--status-info-bg)}
.pillar h3{font-size:21px;font-weight:700;letter-spacing:-.01em;margin-bottom:10px}
.pillar p{font-size:14.5px;color:var(--text-secondary);margin-bottom:18px;line-height:1.6}
.pillar ul{list-style:none;display:flex;flex-direction:column;gap:9px;margin-bottom:20px}
.pillar li{font-size:14px;color:var(--text-primary);display:flex;gap:10px;align-items:flex-start}
.pillar li svg{flex:0 0 16px;margin-top:3px;color:var(--brand-500)}
.pillar .more{font-size:14px;font-weight:600;color:var(--brand-600);display:inline-flex;align-items:center;gap:6px}

/* ── INDUSTRIES ── */
.industries{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.ind{background:var(--surface-2);border:1px solid var(--border);border-radius:14px;padding:26px 22px;transition:all .18s}
.ind:hover{border-color:var(--brand-300);box-shadow:0 12px 34px -18px rgba(26,86,160,.4);transform:translateY(-2px)}
.ind .ic{width:44px;height:44px;border-radius:11px;background:var(--brand-50);display:flex;align-items:center;justify-content:center;color:var(--brand-600);margin-bottom:16px}
.ind h4{font-size:17px;font-weight:700;margin-bottom:7px}
.ind .desc{font-size:13.5px;color:var(--text-secondary);line-height:1.55;margin-bottom:16px;min-height:62px}
.ind .metrics{display:flex;flex-direction:column;gap:7px;border-top:1px solid var(--border);padding-top:14px}
.ind .metric{display:flex;align-items:baseline;gap:8px;font-size:13px}
.ind .metric b{color:var(--brand-600);font-weight:700;font-size:15px;letter-spacing:-.01em}
.ind .metric span{color:var(--text-muted)}

/* ── ARCHITECTURE ── */
.arch{background:var(--surface-1)}
.arch .sec-eyebrow{color:var(--brand-600)}
.arch-stack{display:flex;flex-direction:column;gap:10px;margin-top:8px;max-width:760px;background:var(--brand-800);border-radius:16px;padding:24px}
.layer{border:1px solid rgba(164,198,236,.20);border-radius:10px;padding:14px 18px;background:rgba(255,255,255,.06);display:grid;grid-template-columns:185px 1fr;gap:18px;align-items:center}
.layer.top{background:rgba(63,126,203,.28);border-color:var(--brand-300)}
.layer .lname{font-size:15px;font-weight:700;color:#fff}
.layer .lname .en{display:block;font-size:11px;font-weight:500;color:var(--brand-300);margin-top:3px;letter-spacing:.02em}
.layer .lbits{display:flex;flex-wrap:wrap;gap:8px}
.chip{font-size:12px;color:var(--brand-100);background:rgba(164,198,236,.10);border:1px solid rgba(164,198,236,.18);padding:4px 11px;border-radius:100px}
.layer.top .chip{background:rgba(255,255,255,.10);color:#fff}

/* ── SMARTBURN ── */
.partner-band{background:var(--surface-1);border:1px solid var(--border);border-radius:16px;padding:38px 40px;display:grid;grid-template-columns:1fr 1.3fr;gap:44px;align-items:center}
.partner-band .lead-k{font-size:13px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--status-info-fg);margin-bottom:12px}
.partner-band h3{font-size:24px;font-weight:800;letter-spacing:-.015em;margin-bottom:12px}
.partner-band p{font-size:15px;color:var(--text-secondary);line-height:1.62}
.flow{display:flex;flex-direction:column;gap:12px}
.flow-row{display:flex;align-items:center;gap:14px;background:var(--surface-2);border:1px solid var(--border);border-radius:11px;padding:16px 18px}
.flow-row .who{font-size:13px;font-weight:700;padding:4px 11px;border-radius:6px;white-space:nowrap;flex:0 0 auto}
.who.sb{background:var(--status-info-bg);color:var(--status-info-fg)}.who.ins{background:var(--brand-50);color:var(--brand-700)}
.flow-row .what{font-size:14px;color:var(--text-primary);line-height:1.5}

/* ── CTA ── */
.cta{background:linear-gradient(135deg,var(--brand-500),var(--brand-700));color:#fff;border-radius:20px;padding:52px;text-align:center;position:relative;overflow:hidden}
.cta h2{font-size:clamp(24px,3vw,36px);font-weight:800;letter-spacing:-.02em;margin-bottom:14px}
.cta p{font-size:17px;color:var(--brand-100);max-width:560px;margin:0 auto 28px}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.cta .btn-primary{background:#fff;color:var(--brand-700);border-color:#fff}.cta .btn-primary:hover{background:var(--brand-50)}

/* ── FOOTER ── */
footer{background:var(--surface-2);border-top:1px solid var(--border);padding:56px 0 30px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;margin-bottom:40px}
.foot-brand p{font-size:13.5px;color:var(--text-muted);line-height:1.6;max-width:280px;margin-top:14px}
.foot-col h5{font-size:12px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--text-muted);margin-bottom:16px}
.foot-col a{display:block;font-size:14px;color:var(--text-secondary);margin-bottom:11px;transition:color .14s}
.foot-col a:hover{color:var(--brand-600)}
.foot-bottom{border-top:1px solid var(--border);padding-top:22px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:13px;color:var(--text-muted)}

/* ── REVEAL ── */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s cubic-bezier(.2,.7,.2,1),transform .6s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}

/* ── RESPONSIVE ── */
@media(max-width:960px){
  .hero2-grid{grid-template-columns:1fr;gap:40px}
  .proof .wrap{grid-template-columns:1fr 1fr;gap:32px 24px}
  .industries{grid-template-columns:1fr 1fr}
  .partner-band{grid-template-columns:1fr;gap:28px}
  .layer{grid-template-columns:1fr;gap:12px}
}
@media(max-width:680px){
  .wrap{padding:0 20px}
  .nav-links{display:none}
  .menu-toggle{display:block}
  .pillars{grid-template-columns:1fr}
  .industries{grid-template-columns:1fr}
  .proof .wrap{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr}
  .cta{padding:40px 24px}
  section{padding:52px 0}
  .client-grid{grid-template-columns:repeat(3,1fr);gap:16px 12px}
  .hero{min-height:100svh}
}
@media(prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
  .scroll-arrow{animation:none}
}