:root{
  --brand:#4D6BFE;
  --brand-hover:#3A57E8;
  --brand-50:#F0F3FF;
  --brand-100:#DDE4FF;
  --bg:#FFFFFF;
  --bg-soft:#F5F7FC;
  --bg-hero:#FBFCFF;
  --bg-deep:#0A1024;
  --bg-deep-2:#0D1530;
  --ink:#0C1220;
  --text:#1B2335;
  --text-2:#4A5468;
  --text-3:#7A8498;
  --border:#E3E8F2;
  --border-strong:#CFD7E6;
  --line-dark:rgba(255,255,255,.12);
  --r-sm:8px;
  --r-md:14px;
  --r-lg:22px;
  --r-pill:999px;
  --shadow-sm:0 1px 2px rgba(12,18,32,.04),0 8px 24px -12px rgba(12,18,32,.12);
  --shadow-md:0 1px 2px rgba(12,18,32,.04),0 8px 24px -12px rgba(12,18,32,.12);
  --shadow-lg:0 2px 4px rgba(12,18,32,.04),0 24px 60px -24px rgba(20,40,120,.28);
  --wrap:1160px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Roboto,Helvetica,Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  color:var(--text);
  background:var(--bg);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
.wrap{width:min(var(--wrap),100% - 48px);margin-inline:auto}

/* header */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.86);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--border);
}
.header-inner{display:flex;align-items:center;gap:32px;height:68px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink)}
.brand-mark{width:28px;height:28px;flex:none;color:var(--brand)}
.brand-text{display:flex;flex-direction:column;line-height:1.15;color:var(--ink);font-weight:700;font-size:17px;letter-spacing:-.01em}
.brand-text em{font-style:normal;font-size:11px;font-weight:500;color:var(--text-3);letter-spacing:.6px}
.nav{display:flex;gap:26px;margin-left:auto;font-size:14.5px}
.nav a{position:relative;padding:6px 0;color:var(--text-2);transition:color .18s}
.nav a::after{content:"";position:absolute;left:0;right:100%;bottom:0;height:2px;background:var(--brand);transition:right .2s ease}
.nav a:hover,.nav a:focus-visible{color:var(--ink)}
.nav a:hover::after,.nav a:focus-visible::after{right:0}
.header-cta{font-size:14px;padding:10px 16px}

/* buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:14px 22px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px -10px rgba(77,107,254,.8)}
.btn-primary:hover,.btn-primary:focus-visible{background:var(--brand-hover);transform:translateY(-1px);box-shadow:0 12px 26px -10px rgba(77,107,254,.9)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--border)}
.btn-ghost:hover,.btn-ghost:focus-visible{border-color:var(--brand);color:var(--brand);background:var(--brand-50)}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:4px}

/* hero */
.hero{
  position:relative;overflow:hidden;
  background:
    radial-gradient(900px 420px at 82% -10%,rgba(77,107,254,.16),transparent 70%),
    radial-gradient(600px 320px at 4% 110%,rgba(77,107,254,.09),transparent 70%),
    linear-gradient(180deg,#FBFCFF,#FFFFFF 70%);
  border-bottom:1px solid var(--border);
  padding:88px 0 92px;
}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:56px;align-items:center}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:600;letter-spacing:.04em;
  color:var(--brand);background:var(--brand-50);
  border:1px solid var(--brand-100);
  padding:7px 14px;border-radius:var(--r-pill);margin-bottom:26px;
}
.hero h1{font-size:clamp(36px,4.6vw,60px);line-height:1.1;letter-spacing:-.035em;color:var(--ink);font-weight:800}
.hero h1 .hl{
  background:linear-gradient(180deg,transparent 64%,var(--brand-100) 64%);
  color:var(--brand);
}
.lede{margin-top:24px;font-size:17px;color:var(--text-2);max-width:34em}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.hero-note{margin-top:26px;font-size:12.5px;color:var(--text-3);letter-spacing:.3px}

/* hero side */
.hero-side{display:flex;flex-direction:column;gap:16px}

/* console */
.console{
  background:#0f1524;border-radius:var(--r-lg);
  border:1px solid #1f2a44;
  box-shadow:0 24px 60px rgba(15,21,36,.28);
  overflow:hidden;color:#c9d3e6;font-size:13px;
}
.console-bar{display:flex;align-items:center;gap:12px;padding:12px 16px;background:#151d31;border-bottom:1px solid #1f2a44}
.dots{display:flex;gap:6px}
.dots i{width:9px;height:9px;border-radius:50%;background:#33405e}
.dots i:first-child{background:#ff5f57}.dots i:nth-child(2){background:#febc2e}.dots i:nth-child(3){background:#28c840}
.console-title{font-size:12px;color:#8b97b0;letter-spacing:.4px}
.console-body{padding:18px 16px 12px}
.msg.user{display:flex;gap:10px;align-items:flex-start;margin-bottom:16px}
.who{
  flex:none;font-size:11px;font-weight:600;color:#9fb2ff;
  background:rgba(77,107,254,.16);border:1px solid rgba(77,107,254,.35);
  padding:2px 8px;border-radius:var(--r-pill);margin-top:2px;
}
.msg.user p{color:#dfe6f5;font-size:13px}
.steps{display:flex;flex-direction:column;gap:9px;margin-bottom:16px}
.steps li{display:flex;align-items:center;gap:9px;font-size:12.5px;color:#9aa6bf}
.tick{color:#3ddc84;font-weight:700}
.step-txt b{color:#e6ecf8;font-weight:600}
.ms{margin-left:auto;font-family:var(--mono);font-size:11px;color:#5f6d88}
.rows{background:#0b1120;border:1px solid #1f2a44;border-radius:var(--r-sm);overflow:hidden;font-family:var(--mono);font-size:11.5px}
.row{display:grid;grid-template-columns:1fr 1.4fr 1.3fr;padding:6px 12px;color:#8f9cb8;border-top:1px solid #18213a}
.row.head{background:#111a2c;color:#6f7d99;border-top:none;font-weight:600}
.console-foot{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:10px 16px;background:#111a2c;border-top:1px solid #1f2a44;font-size:11.5px;
}
.console-foot code{font-family:var(--mono);color:#7f8dab}
.status{display:inline-flex;align-items:center;gap:6px;color:#3ddc84;font-weight:600}
.status i{width:7px;height:7px;border-radius:50%;background:#3ddc84;box-shadow:0 0 0 3px rgba(61,220,132,.18)}

/* download panel */
.download-panel{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);
  padding:18px 20px;box-shadow:var(--shadow-sm);
}
.download-head{display:flex;gap:12px;align-items:flex-start}
.download-ico{
  flex:none;display:inline-flex;align-items:center;justify-content:center;
  width:36px;height:36px;border-radius:var(--r-sm);
  background:var(--brand-50);color:var(--brand);
}
.download-ico svg{width:20px;height:20px}
.download-title{font-size:14.5px;font-weight:700;color:var(--ink);line-height:1.4}
.download-sub{font-size:12.5px;color:var(--text-2);margin-top:2px}
.download-actions{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:14px}
.dl-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:7px;
  padding:9px 10px;border-radius:var(--r-sm);
  font-size:13px;font-weight:600;color:var(--ink);
  background:var(--bg-soft);border:1px solid var(--border);
  transition:border-color .18s,color .18s,background .18s;
}
.dl-btn svg{width:15px;height:15px;flex:none;color:var(--text-2);transition:color .18s}
.dl-btn:hover,.dl-btn:focus-visible{border-color:var(--brand);color:var(--brand);background:var(--brand-50)}
.dl-btn:hover svg,.dl-btn:focus-visible svg{color:var(--brand)}
.download-note{margin-top:12px;font-size:11.5px;color:var(--text-3)}

/* sections */
.section{padding:96px 0}
.section-alt{background:var(--bg-soft);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.section-head{max-width:640px;margin-bottom:52px}
.section-head h2,.usecase-copy h2{font-size:clamp(26px,3vw,38px);color:var(--ink);letter-spacing:-.03em;font-weight:800;line-height:1.2}
.section-head p,.section-sub{margin-top:16px;color:var(--text-2);font-size:16px}

/* cards */
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.card{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-md);
  padding:26px 24px;transition:border-color .2s,box-shadow .2s,transform .2s;
}
.card:hover{border-color:var(--brand-100);box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.card-ico{
  display:inline-flex;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:var(--r-sm);
  background:var(--brand-50);color:var(--brand);margin-bottom:18px;
}
.card-ico svg{width:22px;height:22px}
.card h3{font-size:16.5px;color:var(--ink);margin-bottom:9px;font-weight:700}
.card p{font-size:14px;color:var(--text-2);line-height:1.6}

/* how */
.steps-flow{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--border-strong)}
.flow-item{position:relative;padding:32px 28px 8px 0}
.flow-item+.flow-item{padding-left:28px;border-left:1px solid var(--border-strong)}
.flow-num{font-family:var(--mono);font-size:13px;font-weight:600;color:var(--brand);letter-spacing:1px}
.flow-item h3{font-size:17px;color:var(--ink);margin:10px 0 10px;font-weight:700}
.flow-item p{font-size:14px;color:var(--text-2);line-height:1.7}

/* usecase */
.usecase-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.check-list{margin-top:26px;display:flex;flex-direction:column;gap:14px}
.check-list li{position:relative;padding-left:30px;font-size:14.5px;color:var(--text)}
.check-list li::before{
  content:"";position:absolute;left:0;top:3px;width:18px;height:18px;border-radius:50%;
  background:var(--brand-50);border:1px solid var(--brand-100);
}
.check-list li::after{
  content:"";position:absolute;left:6px;top:8px;width:6px;height:3px;
  border-left:1.6px solid var(--brand);border-bottom:1.6px solid var(--brand);
  transform:rotate(-45deg);
}
.db-panel{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);
  padding:30px;box-shadow:var(--shadow-sm);
}
.db-panel-label{font-size:12px;letter-spacing:1px;color:var(--text-3);font-weight:600;margin-bottom:16px}
.db-tags{display:flex;flex-wrap:wrap;gap:10px}
.db-tag{
  font-size:13.5px;font-weight:600;color:var(--brand);
  background:var(--brand-50);border:1px solid var(--brand-100);
  padding:7px 14px;border-radius:var(--r-pill);
}
.db-lines{display:flex;flex-direction:column;gap:10px;margin:26px 0 20px}
.db-lines span{height:8px;border-radius:var(--r-pill);background:linear-gradient(90deg,var(--brand-100),var(--bg-soft))}
.db-lines span:nth-child(1){width:88%}
.db-lines span:nth-child(2){width:64%}
.db-lines span:nth-child(3){width:76%}
.db-lines span:nth-child(4){width:42%}
.db-lines span:nth-child(5){width:58%}
.db-panel-note{font-size:13px;color:var(--text-2)}

/* faq */
.faq-wrap{max-width:820px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--border-strong);padding:20px 0}
.faq-item summary{
  cursor:pointer;list-style:none;font-size:16px;font-weight:700;color:var(--ink);
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"";flex:none;width:9px;height:9px;
  border-right:2px solid var(--text-3);border-bottom:2px solid var(--text-3);
  transform:rotate(45deg);transition:transform .2s;margin-top:-4px;
}
.faq-item[open] summary::after{transform:rotate(-135deg);margin-top:2px}
.faq-item p{margin-top:12px;font-size:14.5px;color:var(--text-2);max-width:62em}

/* cta */
.cta{
  padding:88px 0;
  background:
    radial-gradient(700px 340px at 88% 0%,rgba(77,107,254,.32),transparent 70%),
    linear-gradient(180deg,var(--bg-deep),var(--bg-deep-2));
  color:#E8EDF8;text-align:center;
}
.cta h2{font-size:clamp(26px,3vw,38px);line-height:1.25;letter-spacing:-.03em;font-weight:800}
.cta p{margin-top:16px;color:#A3B0D2;font-size:15px}
.cta .hero-actions{justify-content:center}
.cta .btn-ghost{background:transparent;color:#E8EDF8;border-color:rgba(255,255,255,.18)}
.cta .btn-ghost:hover,.cta .btn-ghost:focus-visible{border-color:#8FA6FF;color:#fff}

/* footer */
.site-footer{background:var(--bg-deep);color:#93A0C0;padding:56px 0 28px}
.footer-inner{display:flex;justify-content:space-between;gap:40px;flex-wrap:wrap;padding-bottom:36px;border-bottom:1px solid var(--line-dark)}
.footer-brand .brand-text{color:#fff;font-size:15px}
.footer-brand .brand-text em{color:#7F8DAB}
.footer-brand p{margin-top:14px;font-size:14px;max-width:34em;color:#7F8DAB}
.footer-nav{display:flex;flex-wrap:wrap;gap:14px 26px;align-content:flex-start}
.footer-nav a{font-size:14px;color:#9AA6BF;transition:color .18s}
.footer-nav a:hover,.footer-nav a:focus-visible{color:#fff}
.footer-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:22px;font-size:12.5px;color:#6B779A}

/* responsive */
@media (max-width:960px){
  .hero{padding:64px 0 72px}
  .hero-grid{grid-template-columns:1fr;gap:44px}
  .cards{grid-template-columns:repeat(2,1fr)}
  .usecase-grid{grid-template-columns:1fr;gap:36px}
  .steps-flow{grid-template-columns:1fr}
  .flow-item{padding:26px 0 26px}
  .flow-item+.flow-item{padding-left:0;border-left:none;border-top:1px solid var(--border-strong)}
  .nav{display:none}
}
@media (max-width:768px){
  .section{padding:68px 0}
  .cards{grid-template-columns:1fr}
  .header-cta{display:none}
  .header-inner{height:62px}
  .hero h1{font-size:clamp(30px,8vw,40px)}
  .hero-actions .btn{flex:1 1 auto}
  .console-body{padding:14px 12px 10px}
  .row{grid-template-columns:1fr 1.2fr 1fr;font-size:11px}
  .download-actions{grid-template-columns:1fr}
  .footer-inner{flex-direction:column;gap:24px}
}