/* SpeedLink 共享样式 - 青绿色科技主题 */
:root{
  --bg-primary:#0a0f0d;
  --bg-secondary:#0f1714;
  --bg-card:rgba(255,255,255,0.025);
  --bg-card-hover:rgba(16,185,129,0.08);
  --border:rgba(255,255,255,0.07);
  --border-hover:rgba(16,185,129,0.4);
  --text-primary:#ffffff;
  --text-secondary:#c8d6d0;
  --text-tertiary:#6b7f77;
  --brand-1:#10b981;
  --brand-2:#06b6d4;
  --gradient:linear-gradient(135deg,#10b981 0%,#06b6d4 100%);
  --gradient-hover:linear-gradient(135deg,#34d399 0%,#22d3ee 100%);
  --shadow:0 10px 40px rgba(16,185,129,0.15);
  --shadow-hover:0 18px 50px rgba(16,185,129,0.28);
  --radius:12px;
  --radius-lg:18px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg-primary);color:var(--text-secondary);
  line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
ul{list-style:none}

::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--bg-primary)}
::-webkit-scrollbar-thumb{background:linear-gradient(180deg,#06b6d4,#0a0f0d);border-radius:10px}
::-webkit-scrollbar-thumb:hover{background:linear-gradient(180deg,#10b981,#06b6d4)}

.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:88px 0;position:relative}
.section-head{text-align:center;margin-bottom:56px}
.section-eyebrow{
  display:inline-block;font-size:12px;letter-spacing:2.5px;text-transform:uppercase;
  color:var(--brand-1);padding:5px 12px;border:1px solid var(--border-hover);
  border-radius:100px;background:var(--bg-card);margin-bottom:16px;
}
.section-title{
  font-size:clamp(26px,3.8vw,40px);font-weight:700;color:var(--text-primary);
  letter-spacing:-.4px;margin-bottom:12px;
}
.section-title .grad{
  background:var(--gradient);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.section-sub{font-size:15px;color:var(--text-tertiary);max-width:640px;margin:0 auto}

.btn{
  display:inline-flex;align-items:center;gap:8px;padding:13px 26px;
  font-size:14.5px;font-weight:600;border-radius:10px;transition:all .3s ease;
  white-space:nowrap;letter-spacing:.2px;
}
.btn-primary{background:var(--gradient);color:#fff;box-shadow:0 6px 20px rgba(16,185,129,0.35)}
.btn-primary:hover{background:var(--gradient-hover);transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.btn-ghost{background:transparent;color:var(--text-primary);border:1px solid var(--border)}
.btn-ghost:hover{border-color:var(--brand-1);color:var(--brand-1);background:var(--bg-card-hover)}

.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(10,15,13,0.75);backdrop-filter:saturate(160%) blur(12px);
  -webkit-backdrop-filter:saturate(160%) blur(12px);
  border-bottom:1px solid var(--border);transition:all .3s;
}
.nav-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:68px;max-width:1200px;margin:0 auto;padding:0 24px;
}
.brand{display:flex;align-items:center;gap:9px;font-weight:700;font-size:19px;color:#fff}
.brand-mark{
  width:34px;height:34px;border-radius:9px;background:var(--gradient);
  display:grid;place-items:center;box-shadow:0 4px 14px rgba(16,185,129,0.4);
}
.brand-mark svg{width:19px;height:19px;color:#fff}
.nav-menu{display:flex;align-items:center;gap:28px}
.nav-link{position:relative;font-size:14.5px;color:var(--text-secondary);padding:7px 0;transition:color .3s}
.nav-link:hover,.nav-link.active{color:#fff}
.nav-link.active::after{
  content:"";position:absolute;left:0;right:0;bottom:-3px;
  height:2px;background:var(--gradient);border-radius:2px;
}
.nav-cta{padding:9px 20px;font-size:13.5px}
.nav-toggle{display:none;width:38px;height:38px;border-radius:9px;border:1px solid var(--border);color:#fff;align-items:center;justify-content:center}
.nav-toggle svg{width:19px;height:19px}

.footer{background:var(--bg-secondary);border-top:1px solid var(--border);padding:64px 0 24px}
.footer-grid{display:grid;grid-template-columns:1.5fr repeat(4,1fr);gap:36px;margin-bottom:40px}
.footer-brand p{color:var(--text-tertiary);font-size:13.5px;margin-top:12px;max-width:260px}
.footer-social{display:flex;gap:9px;margin-top:16px}
.footer-social a{
  width:34px;height:34px;border-radius:9px;border:1px solid var(--border);
  display:grid;place-items:center;color:var(--text-tertiary);transition:all .3s;
}
.footer-social a:hover{border-color:var(--border-hover);color:var(--brand-1);background:var(--bg-card-hover)}
.footer-social svg{width:15px;height:15px}
.footer-col h4{color:#fff;font-size:13.5px;font-weight:600;margin-bottom:14px}
.footer-col ul{display:flex;flex-direction:column;gap:9px}
.footer-col a{color:var(--text-tertiary);font-size:13px;transition:color .3s}
.footer-col a:hover{color:var(--brand-1)}
.footer-bottom{
  border-top:1px solid var(--border);padding-top:20px;
  display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;
  color:var(--text-tertiary);font-size:12.5px;
}

@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.5;transform:scale(1.25)}}
@keyframes fadeUp{from{opacity:0;transform:translateY(22px)}to{opacity:1;transform:translateY(0)}}
@keyframes waveMove{0%{transform:translateX(0)}100%{transform:translateX(-50%)}}
.fade-up{opacity:0;transform:translateY(22px);transition:all .75s cubic-bezier(.2,.7,.2,1)}
.fade-up.in{opacity:1;transform:translateY(0)}
.stagger>*{opacity:0;transform:translateY(18px);transition:all .65s cubic-bezier(.2,.7,.2,1)}
.stagger.in>*{opacity:1;transform:translateY(0)}
.stagger.in>*:nth-child(1){transition-delay:.04s}
.stagger.in>*:nth-child(2){transition-delay:.10s}
.stagger.in>*:nth-child(3){transition-delay:.16s}
.stagger.in>*:nth-child(4){transition-delay:.22s}
.stagger.in>*:nth-child(5){transition-delay:.28s}
.stagger.in>*:nth-child(6){transition-delay:.34s}
.stagger.in>*:nth-child(7){transition-delay:.40s}
.stagger.in>*:nth-child(8){transition-delay:.46s}

@media (max-width:1024px){
  .footer-grid{grid-template-columns:1fr 1fr 1fr}
}
@media (max-width:768px){
  .section{padding:56px 0}
  .section-head{margin-bottom:36px}
  .nav-menu{
    position:fixed;top:68px;left:0;right:0;background:var(--bg-secondary);
    flex-direction:column;gap:0;padding:12px 0;border-bottom:1px solid var(--border);
    transform:translateY(-120%);transition:transform .3s ease;
  }
  .nav-menu.open{transform:translateY(0)}
  .nav-menu .nav-link{padding:13px 24px;width:100%;border-bottom:1px solid var(--border)}
  .nav-menu .nav-cta{margin:12px 24px 6px;justify-content:center}
  .nav-toggle{display:flex}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .footer-bottom{flex-direction:column;text-align:center}
}
@media (max-width:480px){
  .container{padding:0 16px}
  .footer-grid{grid-template-columns:1fr}
}