*,*::before,*::after{box-sizing:border-box}
:root{
  --bg:#fff;
  --bg-card:#fafbfc;
  --text:#0b1220;
  --text-2:#475467;
  --text-3:#667085;
  --border:#e4e7ec;
  --border-hover:#98a2b3;
  --accent:#0b1220;
  --signal:#175cd3;
  --signal-soft:#eff4ff;
  --focus:#155eef;
}
html{font-size:16px}
body{
  margin:0;background:var(--bg);color:var(--text);line-height:1.6;
  font-family:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
a{color:inherit;text-decoration:none}
a:focus-visible,button:focus-visible{outline:3px solid var(--focus);outline-offset:3px;border-radius:4px}
.skip-link{position:absolute;left:-9999px;top:0;z-index:1000;padding:12px 20px;background:var(--accent);color:#fff;font-size:14px;font-weight:600;border-radius:0 0 8px 0}
.skip-link:focus{left:0}

/* Navigation */
.nav{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.98);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.nav-inner{max-width:1080px;margin:0 auto;padding:12px 32px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.nav-logo{min-height:44px;display:inline-flex;align-items:center;font-size:17px;font-weight:650;letter-spacing:-.3px;white-space:nowrap}
.nav-logo .logo-icon{flex:none;width:20px;height:20px;margin-right:8px;border-radius:5px}
.nav-right{display:flex;align-items:center;gap:16px}
.lang-switch{display:flex;align-items:center;gap:4px;font-size:13px}
.lang-switch a{min-width:28px;min-height:44px;display:inline-flex;align-items:center;justify-content:center;color:var(--text-2);transition:color .2s}
.lang-switch a.active{color:var(--text);font-weight:650}
.lang-switch a:hover{color:var(--text)}
.lang-switch .sep{color:#a8a8a8}
.nav-cta{min-height:44px;display:inline-flex;align-items:center;justify-content:center;padding:8px 18px;border-radius:6px;background:var(--accent);color:#fff;font-size:14px;font-weight:600;white-space:nowrap;transition:background-color .2s}
.nav-cta:hover{background:#333}

/* Hero */
.hero{position:relative;min-height:600px;height:100vh;height:100dvh;display:flex;align-items:center;justify-content:center;text-align:center;overflow:hidden;padding:0 32px;background:#171717 url("hero-poster.svg") center/cover no-repeat}
.hero-video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0}
.hero::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,.66),rgba(0,0,0,.62));z-index:1}
.hero-content{position:relative;z-index:2;max-width:800px}
.hero h1{font-size:clamp(36px,6vw,64px);font-weight:750;letter-spacing:-1.5px;line-height:1.1;margin:0 0 24px;color:#fff;text-wrap:balance}
.hero p{font-size:clamp(16px,2vw,19px);color:#fff;max-width:560px;margin:0 auto 40px;line-height:1.65;text-wrap:balance}
.hero-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.btn{min-height:48px;display:inline-flex;align-items:center;justify-content:center;padding:12px 28px;border-radius:8px;font-size:15px;font-weight:600;transition:background-color .2s,border-color .2s;cursor:pointer}
.btn-primary{background:#fff;color:var(--text)}
.btn-primary:hover{background:#e8e8e8}
.btn-secondary{background:#232323;color:#fff;border:1px solid #fff}
.btn-secondary:hover{background:#3b3b3b}

.divider{max-width:1080px;margin:0 auto;border-top:1px solid var(--border)}
.stats{max-width:1080px;margin:0 auto;padding:80px 32px;display:grid;grid-template-columns:repeat(4,1fr);gap:40px}
.stat{text-align:center}.stat-num{font-size:40px;font-weight:750;letter-spacing:-1px;color:var(--text)}
.stat-label{font-size:13px;color:var(--text-3);margin-top:6px}

.section{max-width:1080px;margin:0 auto;padding:100px 32px}
.section-head{margin-bottom:56px;max-width:600px}
.section-tag{font-size:13px;color:var(--signal);margin-bottom:12px;font-weight:700;letter-spacing:.5px}
.section-title{font-size:clamp(26px,4vw,36px);font-weight:750;letter-spacing:-1px;line-height:1.2;margin:0 0 12px;text-wrap:balance}
.section-desc{font-size:16px;color:var(--text-2);line-height:1.6}

.perf-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:40px;align-items:center}
.perf-chart{background:linear-gradient(145deg,#fbfdff,var(--signal-soft));border:1px solid #dbe6ff;border-radius:12px;padding:24px}
.perf-chart svg{display:block;width:100%;height:auto}
.perf-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}.perf-item{text-align:center}
.perf-num{font-size:30px;font-weight:750;color:var(--text);letter-spacing:-.5px}
.perf-label{font-size:13px;color:var(--text-3);margin-top:4px}
.perf-note{font-size:13px;color:var(--text-3);margin-top:36px;text-align:center}
.risk-disclosure{margin-top:28px;padding:24px 28px;border:1px solid #dbe6ff;border-radius:12px;background:var(--signal-soft)}
.risk-disclosure h3{margin:0 0 8px;font-size:15px;font-weight:700;color:var(--text)}
.risk-disclosure p{margin:0;color:var(--text-2);font-size:14px;line-height:1.7}
.risk-disclosure p+p{margin-top:10px}
.risk-disclosure strong{color:var(--text)}
.report-link{display:inline-block;margin-top:10px;padding:8px 16px;border:1px solid var(--border);border-radius:8px;font-size:13px;font-weight:650;color:var(--text);background:#fff;transition:border-color .2s}
.report-link:hover{border-color:var(--border-hover)}
.footer-legal{max-width:1080px;margin:24px auto 0;padding-top:20px;border-top:1px solid var(--border)}
.footer-legal h3{font-size:13px;font-weight:650;color:var(--text);margin:0 0 10px;letter-spacing:.3px}
.footer-legal p{font-size:12px;color:var(--text-3);line-height:1.7;margin:0 0 8px;max-width:760px}
.footer-legal p:last-child{margin-bottom:0}
.footer-legal a{text-decoration:underline;text-underline-offset:2px}
.footer-legal strong{color:var(--text-2)}
.tbc{display:inline-block;padding:1px 8px;border:1px dashed var(--border-hover);border-radius:4px;font-size:12px;font-weight:650;color:var(--text-3);white-space:nowrap}

/* Cookie consent banner */
.cookie-banner{position:fixed;left:0;right:0;bottom:0;z-index:400;background:#0b1220;color:#fff;padding:16px 20px;box-shadow:0 -10px 30px rgba(0,0,0,.22);transform:translateY(100%);visibility:hidden;transition:transform .3s ease,visibility .3s ease}
.cookie-banner.open{transform:translateY(0);visibility:visible}
.cookie-banner-inner{max-width:1080px;margin:0 auto;display:flex;align-items:center;gap:16px 24px;flex-wrap:wrap}
.cookie-banner p{margin:0;font-size:13px;line-height:1.6;flex:1 1 320px}
.cookie-banner a{color:#fff;text-decoration:underline;text-underline-offset:2px}
.cookie-banner-actions{display:flex;gap:10px;flex-wrap:wrap}
.cookie-banner button{min-height:40px;padding:8px 20px;border-radius:8px;font-size:14px;font-weight:600;cursor:pointer;font-family:inherit}
.cookie-banner .cb-essential{background:transparent;color:#fff;border:1px solid #4b5563}
.cookie-banner .cb-accept{background:#fff;color:#0b1220;border:0}
.cookie-banner .cb-accept:hover{background:#e8e8e8}

/* Legal pages (privacy policy) */
.legal{max-width:760px;margin:0 auto;padding:80px 32px 110px}
.legal h1{font-size:clamp(28px,4vw,38px);font-weight:750;letter-spacing:-1px;margin:0 0 6px;text-wrap:balance}
.legal .legal-updated{font-size:13px;color:var(--text-3);margin:0 0 36px}
.legal h2{font-size:20px;font-weight:700;margin:40px 0 12px;color:var(--text)}
.legal h3{font-size:16px;font-weight:650;margin:26px 0 8px;color:var(--text)}
.legal p,.legal li{font-size:15px;color:var(--text-2);line-height:1.85}
.legal p{margin:0 0 12px}
.legal ul{margin:6px 0 18px;padding-left:22px}
.legal li{margin:6px 0}
.legal strong{color:var(--text)}
.legal a{text-decoration:underline;text-underline-offset:2px}

.features{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.feature{padding:36px 32px;background:var(--bg-card);border:1px solid var(--border);border-radius:12px;transition:border-color .2s}
.feature:hover{border-color:var(--border-hover)}.feature h3{font-size:18px;font-weight:650;margin:0 0 10px}
.feature p{font-size:15px;color:var(--text-2);line-height:1.65}.feature-list{list-style:none;margin:20px 0 0;padding:0}
.feature-list li{font-size:14px;color:var(--text-3);padding:7px 0 7px 20px;position:relative}
.feature-list li::before{content:"";position:absolute;left:0;top:14px;width:5px;height:5px;border-radius:50%;background:var(--text-3)}

.arch{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.arch-card{padding:28px 24px;background:var(--bg-card);border:1px solid var(--border);border-radius:10px;transition:border-color .2s}
.arch-card:hover{border-color:var(--border-hover)}.arch-num{font-size:12px;color:var(--text-3);font-weight:650;margin-bottom:10px;letter-spacing:1px}
.arch-card h3{font-size:16px;font-weight:650;margin:0 0 6px}.arch-card p{font-size:14px;color:var(--text-3);line-height:1.6}

.sec-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:40px}.sec-item h3{font-size:17px;font-weight:650;margin:0 0 12px}
.sec-item p{font-size:15px;color:var(--text-2);line-height:1.7}

.cta{max-width:1080px;margin:0 auto;padding:120px 32px;text-align:center}.cta h2{font-size:clamp(28px,4vw,40px);font-weight:750;letter-spacing:-1px;line-height:1.2;margin:0 0 16px;text-wrap:balance}
.cta p{font-size:17px;color:var(--text-2);margin:0 0 36px}.legal-note{max-width:680px;margin:28px auto 0!important;font-size:13px!important;line-height:1.7}.footer{border-top:1px solid var(--border);padding:28px 32px}
.footer-inner{max-width:1080px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:20px}.footer-logo{font-size:15px;font-weight:650;display:inline-flex;align-items:center}
.footer-logo .logo-icon{flex:none;width:16px;height:16px;margin-right:6px;border-radius:4px}
.footer-links{display:flex;gap:8px;flex-wrap:wrap}.footer-links a{min-height:44px;display:inline-flex;align-items:center;padding:0 8px;font-size:13px;color:var(--text-2);transition:color .2s}.footer-links a:hover{color:var(--text)}
.footer-links button{min-height:44px;display:inline-flex;align-items:center;padding:0 8px;background:none;border:0;font-family:inherit;font-size:13px;color:var(--text-2);cursor:pointer;transition:color .2s}
.footer-links button:hover{color:var(--text)}
.footer-copy{font-size:13px;color:var(--text-3)}

/* Contact dropdown */
.contact-drop{position:relative}
.contact-drop .btn,.contact-drop .nav-cta{font-family:inherit;border:0;appearance:none;-webkit-appearance:none}
.contact-chevron{flex:none;width:12px;height:12px;margin-left:7px;transition:transform .2s ease}
.contact-drop.open .contact-chevron{transform:rotate(180deg)}
.contact-menu{position:absolute;top:calc(100% + 10px);left:50%;min-width:210px;margin:0;padding:6px;background:#fff;border:1px solid var(--border);border-radius:10px;box-shadow:0 16px 40px rgba(0,0,0,.14);list-style:none;opacity:0;visibility:hidden;transform:translate(-50%,-8px);transition:opacity .18s ease,transform .18s ease,visibility .18s;z-index:300}
.contact-drop.open .contact-menu{opacity:1;visibility:visible;transform:translate(-50%,0)}
.nav .contact-menu,.footer .contact-menu{left:auto;right:0;transform:translateY(-8px)}
.nav .contact-drop.open .contact-menu,.footer .contact-drop.open .contact-menu{transform:translateY(0)}
.contact-menu a{display:flex;align-items:center;gap:11px;min-height:42px;padding:0 12px;border-radius:8px;font-size:14px;font-weight:600;color:var(--text);white-space:nowrap;transition:background-color .15s}
.contact-menu a:hover{background:var(--bg-card)}
.contact-menu svg{flex:none;width:18px;height:18px}
.contact-menu .icon-tg{color:#229ED9}
.contact-menu .icon-wa{color:#25D366}
.footer-trigger{display:inline-flex;align-items:center;min-height:44px;padding:0 8px;background:none;border:0;font-family:inherit;font-size:13px;color:var(--text-2);cursor:pointer;transition:color .2s}
.footer-trigger:hover{color:var(--text)}
.footer-trigger .contact-chevron{width:11px;height:11px;margin-left:2px}

.reveal{opacity:1;transform:none}
@media (prefers-reduced-motion:no-preference){
  html{scroll-behavior:smooth}
  .has-js .reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
  .has-js .reveal.visible{opacity:1;transform:translateY(0)}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important;transition-duration:.01ms!important}
  .hero-video{display:none}
}
@media (max-width:768px){.perf-grid{grid-template-columns:1fr}.features,.arch,.sec-grid{grid-template-columns:repeat(2,1fr)}.sec-item:last-child{grid-column:1/-1}}
@media (max-width:640px){
  .nav-inner{padding:10px 18px;gap:8px}.nav-logo{font-size:15px;letter-spacing:-.45px}.nav-right{gap:2px;flex:none}.lang-switch{gap:2px;font-size:12px}.lang-switch a{min-width:22px}.nav-cta{padding:7px 10px;font-size:13px}
  .hero{min-height:500px;padding:0 20px}.hero h1{margin-bottom:18px;letter-spacing:-.5px}.hero p{margin-bottom:30px}.hero-actions{gap:10px}.btn{min-height:46px;padding:11px 22px;font-size:14px}
  .stats{padding:52px 20px;grid-template-columns:repeat(2,1fr);gap:28px}.stat-num{font-size:30px}.stat-label,.section-tag{font-size:12px}
  .section{padding:64px 20px}.section-head{margin-bottom:36px;max-width:100%}.section-title{letter-spacing:-.3px}.perf-grid{gap:28px}.perf-chart{padding:16px}.perf-stats{gap:20px 16px}.perf-num{font-size:26px}.perf-label,.perf-note{font-size:12px}.perf-note{margin-top:24px;line-height:1.6}
  .risk-disclosure{margin-top:22px;padding:20px}.risk-disclosure h3{font-size:14px}.risk-disclosure p{font-size:13px}.footer-legal{padding-top:16px}.footer-legal h3{font-size:12px}.footer-legal p{font-size:11px}.tbc{font-size:11px}.features{gap:10px}.feature{padding:16px 14px}.feature h3{font-size:15px;margin-bottom:6px}.feature p{font-size:12.5px}.feature-list{margin-top:12px}.feature-list li{font-size:12px;padding:5px 0 5px 16px}.feature-list li::before{top:11px}
  .arch{gap:8px}.arch-card{padding:14px 12px}.arch-card h3{font-size:13px}.arch-card p{font-size:11.5px;line-height:1.5}.sec-grid{gap:14px}.sec-item h3{font-size:14px;margin-bottom:8px}.sec-item p{font-size:12.5px}.cta{padding:72px 20px}.cta h2{margin-bottom:12px}.cta p{margin-bottom:28px;font-size:16px}
  .footer{padding:24px 20px}.footer-inner{flex-direction:column;align-items:flex-start;gap:12px}.footer-links{gap:4px}
  .legal{padding:48px 20px 76px}.legal h2{font-size:18px}.legal p,.legal li{font-size:14px}
  .cookie-banner{padding:14px 16px}.cookie-banner button{min-height:38px;padding:7px 16px;font-size:13px}
}
@media (max-width:360px){
  .features,.arch,.sec-grid{grid-template-columns:1fr}
  .sec-item:last-child{grid-column:auto}
  .feature{padding:20px 18px}.feature h3{font-size:16px;margin-bottom:6px}.feature p{font-size:13px}.feature-list{margin-top:14px}.feature-list li{font-size:12.5px;padding:6px 0 6px 18px}.feature-list li::before{top:12px}
  .arch-card{padding:18px 16px}.arch-card h3{font-size:14px}.arch-card p{font-size:12px;line-height:1.6}
  .sec-grid{gap:18px}.sec-item h3{font-size:15px}.sec-item p{font-size:13px}
}
:lang(zh-CN) .hero h1,:lang(zh-CN) .section-title,:lang(zh-CN) .cta h2{letter-spacing:0}