:root{
  --bg:#070b14;
  --bg-alt:#0b1120;
  --bg-card:rgba(255,255,255,.04);
  --bg-card-2:rgba(255,255,255,.06);
  --line:rgba(255,255,255,.09);
  --gold:#e8c372;
  --gold-2:#f4d98a;
  --gold-deep:#c9a24a;
  --txt:#e9edf5;
  --txt-dim:#9aa6bd;
  --txt-faint:#6c7890;
  --radius:16px;
  --maxw:1180px;
  --shadow:0 20px 60px rgba(0,0,0,.45);
}
*{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",Roboto,sans-serif;
  background:var(--bg);
  color:var(--txt);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.hl{color:var(--gold);background:linear-gradient(180deg,transparent 60%,rgba(232,195,114,.18) 60%)}

/* ===== 导航 ===== */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:50;
  backdrop-filter:blur(14px);
  background:rgba(7,11,20,.55);
  border-bottom:1px solid transparent;
  transition:background .3s,border-color .3s;
}
.nav.scrolled{background:rgba(7,11,20,.9);border-bottom:1px solid var(--line)}
.nav-inner{max-width:var(--maxw);margin:0 auto;padding:14px 24px;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:10px;font-weight:700}
.brand-mark{
  width:34px;height:34px;border-radius:9px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--gold),var(--gold-deep));
  color:#1a1206;font-weight:800;font-size:15px;letter-spacing:1px;
}
.brand-text{font-size:18px;display:flex;flex-direction:column;line-height:1}
.brand-text i{font-style:normal;font-size:10px;letter-spacing:2px;color:var(--gold);margin-top:3px;font-weight:600}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-links a{color:var(--txt-dim);font-size:14.5px;transition:color .2s}
.nav-links a:hover{color:var(--txt)}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:6px}
.nav-toggle span{width:24px;height:2px;background:var(--txt);border-radius:2px;transition:.3s}

/* ===== 按钮 ===== */
.btn{display:inline-block;padding:13px 28px;border-radius:10px;font-weight:600;font-size:15px;transition:transform .2s,box-shadow .2s,background .2s;cursor:pointer}
.btn-sm{padding:9px 18px;font-size:13.5px}
.btn-gold{background:linear-gradient(135deg,var(--gold-2),var(--gold-deep));color:#1a1206;box-shadow:0 8px 24px rgba(232,195,114,.25)}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(232,195,114,.4)}
.btn-ghost{border:1px solid var(--line);color:var(--txt);background:rgba(255,255,255,.02)}
.btn-ghost:hover{border-color:var(--gold);color:var(--gold)}

/* ===== Hero ===== */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;overflow:hidden}
.hero-bg{
  position:absolute;inset:0;
  background:
    radial-gradient(900px 500px at 75% 15%,rgba(232,195,114,.16),transparent 60%),
    radial-gradient(700px 500px at 10% 80%,rgba(80,120,255,.12),transparent 60%),
    linear-gradient(180deg,#070b14,#0a1020);
}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.025) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.025) 1px,transparent 1px);
  background-size:46px 46px;
  mask-image:radial-gradient(circle at 50% 40%,#000,transparent 75%);
}
.hero-inner{position:relative;max-width:var(--maxw);margin:0 auto;padding:120px 24px 80px}
.hero-tag{display:inline-block;padding:7px 16px;border:1px solid var(--gold);border-radius:999px;color:var(--gold);font-size:13px;letter-spacing:1px;margin-bottom:26px}
.hero h1{font-size:clamp(38px,6vw,72px);line-height:1.1;font-weight:800;letter-spacing:-1px}
.hero-sub{margin:26px 0 36px;max-width:620px;font-size:clamp(16px,2vw,19px);color:var(--txt-dim)}
.hero-cta{display:flex;gap:16px;flex-wrap:wrap}
.hero-stats{display:flex;gap:40px;flex-wrap:wrap;margin-top:64px;padding-top:36px;border-top:1px solid var(--line)}
.stat{display:flex;flex-direction:column}
.stat b{font-size:22px;color:var(--gold);font-weight:800}
.stat span{font-size:13px;color:var(--txt-faint);margin-top:4px}

/* ===== 通用 section ===== */
.section{padding:100px 0}
.section-alt{background:var(--bg-alt)}
.sec-head{text-align:center;max-width:720px;margin:0 auto 56px}
.sec-kicker{font-size:12px;letter-spacing:3px;color:var(--gold);font-weight:700;margin-bottom:14px}
.sec-head h2{font-size:clamp(26px,3.6vw,40px);font-weight:800;letter-spacing:-.5px}
.sec-head p{margin-top:14px;color:var(--txt-dim);font-size:16px}

/* ===== 卡片 ===== */
.grid{display:grid;gap:24px}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{
  background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 26px;transition:transform .3s,border-color .3s,background .3s;
}
.card:hover{transform:translateY(-6px);border-color:rgba(232,195,114,.4);background:var(--bg-card-2)}
.card-ico{font-size:30px;color:var(--gold);margin-bottom:16px}
.card h3{font-size:19px;margin-bottom:10px}
.card p{color:var(--txt-dim);font-size:14.5px}

/* ===== 策略 ===== */
.strat{
  background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius);
  padding:34px 30px;position:relative;overflow:hidden;transition:transform .3s,border-color .3s;
}
.strat:hover{transform:translateY(-6px);border-color:rgba(232,195,114,.4)}
.strat-badge{
  position:absolute;top:22px;right:22px;font-size:12px;letter-spacing:1px;
  padding:5px 12px;border-radius:999px;background:rgba(232,195,114,.12);color:var(--gold);border:1px solid rgba(232,195,114,.3);
}
.strat h3{font-size:21px;margin-bottom:12px}
.strat p{color:var(--txt-dim);font-size:14.5px;margin-bottom:16px}
.strat-list{list-style:none;display:flex;flex-direction:column;gap:9px}
.strat-list li{position:relative;padding-left:22px;color:var(--txt-dim);font-size:14px}
.strat-list li::before{content:"◆";position:absolute;left:0;color:var(--gold);font-size:11px;top:3px}

/* ===== 流程 ===== */
.flow{display:flex;align-items:stretch;justify-content:space-between;gap:8px;flex-wrap:wrap}
.flow-node{
  flex:1;min-width:160px;background:var(--bg-card);border:1px solid var(--line);
  border-radius:var(--radius);padding:26px 18px;text-align:center;transition:transform .3s,border-color .3s;
}
.flow-node:hover{transform:translateY(-4px);border-color:rgba(232,195,114,.4)}
.flow-ico{font-size:30px;margin-bottom:12px}
.flow-node h4{font-size:16px;margin-bottom:8px}
.flow-node p{font-size:12.5px;color:var(--txt-faint)}
.flow-arrow{display:flex;align-items:center;color:var(--gold);font-size:22px;flex:0 0 auto}
.arch-note{margin-top:36px;text-align:center;color:var(--txt-dim);font-size:14.5px;background:var(--bg-card);border:1px solid var(--line);border-radius:12px;padding:20px}

/* ===== 为什么选我们 ===== */
.why-grid{gap:30px}
.why-item{display:flex;gap:20px;align-items:flex-start;background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius);padding:28px}
.why-num{font-size:30px;font-weight:800;color:var(--gold);line-height:1;opacity:.8}
.why-item h3{font-size:18px;margin-bottom:8px}
.why-item p{color:var(--txt-dim);font-size:14.5px}

/* ===== 风险提示 ===== */
.risk{padding:70px 0}
.risk-box{
  background:rgba(255,90,90,.06);border:1px solid rgba(255,120,120,.25);
  border-radius:var(--radius);padding:34px 32px;max-width:880px;margin:0 auto;
}
.risk-box h2{font-size:22px;color:#ff9b9b;margin-bottom:14px}
.risk-box p{color:#e7c9c9;font-size:14.5px}
.risk-box b{color:#ffd0d0}

/* ===== CTA ===== */
.cta{padding:90px 0}
.cta-box{
  text-align:center;background:linear-gradient(135deg,rgba(232,195,114,.10),rgba(80,120,255,.06));
  border:1px solid rgba(232,195,114,.25);border-radius:24px;padding:60px 30px;
}
.cta-box h2{font-size:clamp(26px,3.4vw,38px);font-weight:800}
.cta-box>p{color:var(--txt-dim);margin:16px 0 30px;font-size:16px}
.cta-contact{display:flex;gap:40px;justify-content:center;flex-wrap:wrap;margin-bottom:32px}
.cta-item{display:flex;flex-direction:column;gap:4px}
.cta-item span{font-size:12px;color:var(--txt-faint);letter-spacing:1px}
.cta-item b{font-size:16px;color:var(--gold)}

/* ===== 页脚 ===== */
.footer{border-top:1px solid var(--line);padding:40px 0;background:var(--bg-alt)}
.footer-inner{display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap}
.footer-brand{display:flex;align-items:center;gap:10px;font-weight:700}
.footer-meta{text-align:right;color:var(--txt-faint);font-size:13px}
.footer-meta p{margin:3px 0}
.footer-meta .beian span{color:var(--gold)}

/* ===== 动画 ===== */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* ===== 响应式 ===== */
@media(max-width:980px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .flow{flex-direction:column}
  .flow-arrow{transform:rotate(90deg);justify-content:center;padding:6px 0}
}
@media(max-width:680px){
  .nav-links{
    position:fixed;top:62px;right:0;left:0;flex-direction:column;align-items:flex-start;
    gap:4px;padding:18px 24px;background:rgba(7,11,20,.97);border-bottom:1px solid var(--line);
    transform:translateY(-130%);transition:transform .3s;
  }
  .nav-links.open{transform:translateY(0)}
  .nav-links a{padding:10px 0;width:100%}
  .nav-toggle{display:flex}
  .grid-4,.grid-2{grid-template-columns:1fr}
  .hero-stats{gap:24px}
  .footer-inner{flex-direction:column;align-items:flex-start}
  .footer-meta{text-align:left}
  .cta-contact{gap:24px}
}