:root{
  --blue:#1769ff;
  --blue-2:#0b3aa6;
  --ink:#0c1430;
  --ink-2:#3a4668;
  --bg:#f5f8ff;
  --white:#ffffff;
  --line:#e3e9f7;
  --radius:16px;
  --shadow:0 18px 50px -20px rgba(13,40,120,.35);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,"PingFang SC","Microsoft YaHei",Segoe UI,Roboto,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.6;
}
.container{width:min(1120px,92%);margin:0 auto}
a{text-decoration:none;color:inherit}

/* 导航 */
.nav{position:sticky;top:0;z-index:50;background:rgba(245,248,255,.85);
  backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{font-weight:800;font-size:1.25rem;display:flex;align-items:center;gap:8px}
.brand-light{color:var(--blue)}
.brand-dot{width:12px;height:12px;border-radius:50%;
  background:linear-gradient(135deg,var(--blue),#54a0ff);box-shadow:0 0 12px rgba(23,105,255,.6)}
.nav-links{display:flex;gap:30px;font-weight:500;color:var(--ink-2)}
.nav-links a:hover{color:var(--blue)}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;
  padding:11px 22px;border-radius:999px;font-weight:600;font-size:.95rem;
  transition:.2s transform,.2s box-shadow,.2s background;cursor:pointer}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:linear-gradient(135deg,var(--blue),var(--blue-2));color:#fff;
  box-shadow:0 10px 24px -8px rgba(23,105,255,.7)}
.btn-ghost{border:1.5px solid var(--line);background:var(--white);color:var(--ink)}
.btn-ghost:hover{border-color:var(--blue);color:var(--blue)}
.btn-lg{padding:15px 34px;font-size:1.05rem}

/* Hero */
.hero{position:relative;overflow:hidden;padding:96px 0 80px;text-align:center}
.hero-bg{position:absolute;inset:0;z-index:0;
  background:
    radial-gradient(60% 50% at 50% 0%,rgba(23,105,255,.18),transparent 70%),
    radial-gradient(40% 40% at 85% 20%,rgba(84,160,255,.16),transparent 70%),
    linear-gradient(180deg,#eaf1ff,transparent 60%)}
.hero-inner{position:relative;z-index:1}
.eyebrow{display:inline-block;letter-spacing:2px;font-size:.8rem;font-weight:700;
  color:var(--blue);background:rgba(23,105,255,.1);padding:6px 14px;border-radius:999px;margin-bottom:22px}
.hero-title{font-size:clamp(2.2rem,5.5vw,3.6rem);font-weight:850;line-height:1.18;letter-spacing:-1px}
.grad{background:linear-gradient(120deg,var(--blue),#54a0ff);-webkit-background-clip:text;
  background-clip:text;color:transparent}
.hero-sub{max-width:640px;margin:22px auto 32px;color:var(--ink-2);font-size:1.12rem}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.hero-stats{display:flex;gap:48px;justify-content:center;flex-wrap:wrap;margin-top:56px}
.hero-stats strong{display:block;font-size:1.8rem;color:var(--blue)}
.hero-stats span{font-size:.9rem;color:var(--ink-2)}

/* Section */
.section{padding:84px 0}
.section-alt{background:var(--white)}
.section-title{font-size:clamp(1.6rem,3.5vw,2.3rem);font-weight:800;text-align:center;letter-spacing:-.5px}
.section-title.left{text-align:left}
.section-sub{text-align:center;color:var(--ink-2);max-width:620px;margin:14px auto 48px}
.section-sub.left{text-align:left;margin:14px 0 28px}

/* Grid + cards */
.grid{display:grid;gap:22px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px;transition:.25s transform,.25s box-shadow}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.card-ico{font-size:1.8rem;width:54px;height:54px;display:grid;place-items:center;
  border-radius:14px;background:rgba(23,105,255,.1);margin-bottom:16px}
.card h3{font-size:1.15rem;margin-bottom:8px}
.card p{color:var(--ink-2);font-size:.96rem}

/* Modules */
.module{display:flex;gap:18px;background:var(--bg);border:1px solid var(--line);
  border-radius:var(--radius);padding:26px}
.module .num{font-size:1.6rem;font-weight:850;color:var(--blue);opacity:.55}
.module h3{font-size:1.18rem;margin-bottom:6px}
.module p{color:var(--ink-2);font-size:.96rem}

/* Integration */
.integration{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
.check-list{list-style:none;display:grid;gap:12px}
.check-list li{padding-left:30px;position:relative;color:var(--ink-2)}
.check-list li::before{content:"✓";position:absolute;left:0;top:0;
  color:#fff;background:var(--blue);width:20px;height:20px;border-radius:50%;
  display:grid;place-items:center;font-size:.75rem;font-weight:800}
.integration-card{background:linear-gradient(135deg,var(--ink),#16244f);color:#fff;
  border-radius:var(--radius);padding:48px 32px;text-align:center;box-shadow:var(--shadow)}
.flow{display:flex;align-items:center;justify-content:center;gap:18px;flex-wrap:wrap}
.flow-node{padding:14px 20px;border-radius:12px;background:rgba(255,255,255,.1);
  font-weight:700;border:1px solid rgba(255,255,255,.18)}
.flow-node.accent{background:linear-gradient(135deg,var(--blue),#54a0ff);border:none}
.flow-arrow{font-size:1.6rem;color:#54a0ff}
.flow-cap{margin-top:22px;color:#aebfe8;font-size:.95rem}

/* CTA */
.cta{padding:84px 0;background:linear-gradient(135deg,var(--blue-2),var(--blue));color:#fff;text-align:center}
.cta-inner h2{font-size:clamp(1.8rem,4vw,2.6rem);font-weight:850}
.cta-inner p{margin:14px 0 28px;opacity:.92;font-size:1.1rem}
.cta .btn-primary{background:#fff;color:var(--blue-2)}

/* Footer */
.footer{padding:30px 0;background:var(--ink);color:#9fb0d8;font-size:.9rem}
.footer-inner{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}

/* 响应式 */
@media(max-width:860px){
  .nav-links{display:none}
  .grid-3,.grid-2{grid-template-columns:1fr}
  .integration{grid-template-columns:1fr}
  .hero-stats{gap:28px}
}