*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:5rem}
body{font-family:'Noto Sans SC','PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;background:#121212;color:#E0E0E0;line-height:1.7;-webkit-font-smoothing:antialiased}
:root{
  --c-red:#E53935;
  --c-blue:#1E88E5;
  --c-silver:#B0BEC5;
  --c-dark:#121212;
  --c-light:#FAFAFA;
  --c-text:#E0E0E0;
  --c-accent:#FF6F00;
  --c-success:#43A047;
  --c-red-dim:rgba(229,57,53,0.12);
  --c-blue-dim:rgba(30,136,229,0.10);
  --font-head:'Roboto Condensed','Impact','Arial Black',sans-serif;
  --font-body:'Noto Sans SC','PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
  --font-num:'JetBrains Mono','SF Mono','Fira Code',monospace;
  --radius-sm:8px;
  --radius-lg:16px;
  --radius-xl:24px;
  --max-width:1200px;
  --header-h:4rem;
  --gap:2rem
}
.skip-link{
  position:absolute;
  top:-100px;left:1rem;
  padding:0.5rem 1rem;
  background:var(--c-red);
  color:#fff;
  border-radius:0 0 var(--radius-sm) var(--radius-sm);
  z-index:10000;
  font-size:0.875rem;
  text-decoration:none;
  transition:top 0.25s
}
.skip-link:focus{top:0;outline:2px solid #fff;outline-offset:2px}
.site-header{
  position:fixed;
  top:0;left:0;width:100%;
  z-index:9999;
  background:transparent;
  transition:background 0.4s ease,box-shadow 0.4s ease;
  height:var(--header-h)
}
.site-header[data-scrolled]{
  background:var(--c-dark);
  box-shadow:0 2px 20px rgba(0,0,0,0.6)
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  max-width:var(--max-width);
  margin:0 auto;
  padding:0 1.5rem;
  height:100%
}
.brand-link{
  display:flex;
  align-items:center;
  gap:0.5rem;
  text-decoration:none;
  color:#fff;
  transition:color 0.3s
}
.site-header[data-scrolled] .brand-link{color:var(--c-text)}
.brand-name{
  font-family:var(--font-head);
  font-size:1.5rem;
  font-weight:700;
  letter-spacing:0.02em;
  color:inherit
}
.brand-dash{
  display:inline-block;
  width:4px;height:1.5rem;
  background:var(--c-red);
  border-radius:2px;
  transform:skewX(-12deg);
  margin-left:0.25rem
}
.header-nav .nav-list{
  display:flex;
  list-style:none;
  gap:0.25rem
}
.nav-link{
  display:block;
  padding:0.5rem 1rem;
  font-family:var(--font-head);
  font-size:0.95rem;
  font-weight:500;
  color:rgba(255,255,255,0.85);
  text-decoration:none;
  border-radius:var(--radius-sm);
  transition:background 0.25s,color 0.25s;
  letter-spacing:0.01em;
  position:relative
}
.site-header[data-scrolled] .nav-link{color:var(--c-text)}
.nav-link:hover,.nav-link:focus-visible{color:#fff;background:var(--c-red-dim)}
.site-header[data-scrolled] .nav-link:hover{background:var(--c-red-dim)}
.nav-link[aria-current="page"]{
  color:var(--c-red);
  font-weight:700
}
.nav-link[aria-current="page"]::after{
  content:'';
  position:absolute;
  bottom:2px;left:1rem;right:1rem;
  height:3px;
  background:var(--c-red);
  border-radius:2px
}
.header-actions{
  display:flex;
  align-items:center;
  gap:1rem
}
.btn-header-cta{
  display:inline-flex;
  align-items:center;
  gap:0.4rem;
  padding:0.45rem 1.2rem;
  font-family:var(--font-head);
  font-size:0.85rem;
  font-weight:600;
  color:#fff;
  background:linear-gradient(135deg,var(--c-red),#c62828);
  border-radius:var(--radius-xl);
  text-decoration:none;
  white-space:nowrap;
  transition:transform 0.25s,box-shadow 0.25s;
  box-shadow:0 2px 12px rgba(229,57,53,0.35)
}
.btn-header-cta:hover,.btn-header-cta:focus-visible{
  transform:scale(1.04);
  box-shadow:0 4px 20px rgba(229,57,53,0.55)
}
.nav-toggle{
  display:none;
  flex-direction:column;
  justify-content:center;
  align-items:center;
  width:44px;height:44px;
  background:transparent;
  border:2px solid rgba(255,255,255,0.3);
  border-radius:var(--radius-sm);
  cursor:pointer;
  gap:5px;
  padding:8px;
  transition:border-color 0.3s;
  position:relative
}
.site-header[data-scrolled] .nav-toggle{border-color:rgba(224,224,224,0.3)}
.nav-toggle .toggle-bar{
  display:block;
  width:22px;height:2.5px;
  background:#fff;
  border-radius:2px;
  transition:transform 0.35s,opacity 0.35s
}
.site-header[data-scrolled] .nav-toggle .toggle-bar{background:var(--c-text)}
.nav-toggle[aria-expanded="true"] .toggle-bar:nth-child(1){transform:translateY(7.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .toggle-bar:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .toggle-bar:nth-child(3){transform:translateY(-7.5px) rotate(-45deg)}
.header-progress{
  position:absolute;
  bottom:0;left:0;
  height:3px;
  background:linear-gradient(90deg,var(--c-red),var(--c-blue));
  width:0%;
  transition:width 0.1s linear;
  opacity:0
}
.site-header[data-scrolled] .header-progress{opacity:1}
.site-footer{
  background:var(--c-dark);
  border-top:1px solid rgba(176,190,197,0.1);
  position:relative;
  margin-top:4rem
}
.footer-diagonal{
  height:6px;
  background:linear-gradient(135deg,var(--c-red) 40%,var(--c-blue) 60%,var(--c-silver) 80%);
  clip-path:polygon(0 0,100% 0,100% 100%,0 60%);
  opacity:0.6
}
.footer-inner{
  max-width:var(--max-width);
  margin:0 auto;
  padding:3rem 1.5rem 2rem;
  display:grid;
  grid-template-columns:2fr 1fr 1.5fr;
  gap:2.5rem
}
.footer-brand-link{
  font-family:var(--font-head);
  font-size:1.6rem;
  font-weight:700;
  color:var(--c-red);
  text-decoration:none;
  display:inline-block;
  margin-bottom:0.5rem;
  letter-spacing:0.02em
}
.footer-tagline{
  font-size:0.9rem;
  color:var(--c-silver);
  margin-bottom:0.75rem;
  font-style:italic
}
.footer-desc{
  font-size:0.85rem;
  color:rgba(224,224,224,0.7);
  line-height:1.6
}
.footer-heading{
  font-family:var(--font-head);
  font-size:1rem;
  font-weight:600;
  color:var(--c-text);
  margin-bottom:1rem;
  letter-spacing:0.04em;
  position:relative;
  padding-left:0.75rem
}
.footer-heading::before{
  content:'';
  position:absolute;
  left:0;top:0.2rem;
  width:3px;height:1.1rem;
  background:var(--c-red);
  border-radius:2px
}
.footer-link-list{
  list-style:none;
  display:flex;
  flex-direction:column;
  gap:0.6rem
}
.footer-link-list a,.footer-contact a{
  color:rgba(224,224,224,0.75);
  text-decoration:none;
  font-size:0.9rem;
  transition:color 0.25s,transform 0.2s;
  display:inline-block
}
.footer-link-list a:hover,.footer-link-list a:focus-visible,
.footer-contact a:hover,.footer-contact a:focus-visible{
  color:var(--c-red);
  transform:translateX(3px)
}
.contact-item{
  font-size:0.9rem;
  color:rgba(224,224,224,0.7);
  margin-bottom:0.4rem
}
.contact-note{
  font-size:0.8rem;
  color:var(--c-accent);
  margin-top:0.5rem;
  padding:0.4rem 0.6rem;
  background:rgba(255,111,0,0.08);
  border-radius:var(--radius-sm);
  border-left:3px solid var(--c-accent)
}
.footer-bottom{
  border-top:1px solid rgba(176,190,197,0.08);
  padding:1.2rem 1.5rem;
  text-align:center
}
.footer-copy{
  font-size:0.8rem;
  color:rgba(224,224,224,0.5);
  letter-spacing:0.02em
}
.container{
  max-width:var(--max-width);
  margin:0 auto;
  padding:0 1.5rem
}
.btn-primary{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:0.5rem;
  padding:0.75rem 2rem;
  font-family:var(--font-head);
  font-size:1rem;
  font-weight:600;
  color:#fff;
  background:var(--c-red);
  border:none;
  border-radius:var(--radius-xl);
  cursor:pointer;
  text-decoration:none;
  transition:transform 0.25s,box-shadow 0.25s,background 0.3s;
  box-shadow:0 2px 12px rgba(229,57,53,0.3)
}
.btn-primary:hover,.btn-primary:focus-visible{
  transform:scale(1.04);
  box-shadow:0 4px 24px rgba(229,57,53,0.5);
  background:#c62828
}
.btn-secondary{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:0.5rem;
  padding:0.75rem 2rem;
  font-family:var(--font-head);
  font-size:1rem;
  font-weight:600;
  color:#fff;
  background:var(--c-blue);
  border:none;
  border-radius:var(--radius-xl);
  cursor:pointer;
  text-decoration:none;
  transition:transform 0.25s,box-shadow 0.25s,background 0.3s;
  box-shadow:0 2px 12px rgba(30,136,229,0.3)
}
.btn-secondary:hover,.btn-secondary:focus-visible{
  transform:scale(1.04);
  box-shadow:0 4px 24px rgba(30,136,229,0.5);
  background:#1565C0
}
.card{
  background:rgba(255,255,255,0.04);
  border-radius:var(--radius-lg);
  padding:1.5rem;
  transition:background 0.3s,transform 0.3s;
  border:1px solid transparent
}
.card:hover{background:rgba(255,255,255,0.07);transform:translateY(-2px)}
.badge{
  display:inline-block;
  padding:0.2rem 1rem;
  font-family:var(--font-head);
  font-size:0.75rem;
  font-weight:600;
  border-radius:var(--radius-xl);
  background:var(--c-red);
  color:#fff;
  letter-spacing:0.03em;
  text-transform:uppercase
}
.badge-blue{background:var(--c-blue)}
.section-title{
  font-family:var(--font-head);
  font-size:2rem;
  font-weight:700;
  color:var(--c-text);
  margin-bottom:1.5rem;
  letter-spacing:-0.01em;
  line-height:1.2
}
.section-title .highlight{color:var(--c-red)}
.grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(280px,1fr));
  gap:var(--gap)
}
:focus-visible{outline:2px solid var(--c-red);outline-offset:3px;border-radius:4px}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{transition-duration:0.01ms!important;animation-duration:0.01ms!important}
  .btn-header-cta:hover{transform:none}
  .card:hover{transform:none}
  .nav-link[aria-current="page"]::after{transition:none}
  .header-progress{transition:none}
}
@media(max-width:1024px){
  .footer-inner{grid-template-columns:1fr 1fr}
  .footer-brand-col{grid-column:1 / -1}
}
@media(max-width:768px){
  :root{--header-h:3.75rem;--gap:1.25rem}
  .header-inner{padding:0 1rem}
  .nav-toggle{display:flex}
  .header-nav{
    position:fixed;
    top:var(--header-h);left:0;width:100%;
    background:var(--c-dark);
    border-top:1px solid rgba(229,57,53,0.2);
    padding:0.5rem 1rem 1.5rem;
    opacity:0;visibility:hidden;
    transform:translateY(-8px);
    transition:opacity 0.35s,visibility 0.35s,transform 0.35s;
    box-shadow:0 8px 30px rgba(0,0,0,0.5)
  }
  .header-nav[data-open]{
    opacity:1;visibility:visible;
    transform:translateY(0)
  }
  .header-nav .nav-list{
    flex-direction:column;
    gap:0.15rem
  }
  .nav-link{
    font-size:1.05rem;
    padding:0.7rem 1rem;
    border-radius:var(--radius-sm)
  }
  .nav-link[aria-current="page"]::after{display:none}
  .btn-header-cta{
    font-size:0.75rem;
    padding:0.35rem 0.9rem
  }
  .brand-name{font-size:1.3rem}
  .header-actions{gap:0.5rem}
  .footer-inner{
    grid-template-columns:1fr;
    gap:1.5rem;
    padding:2rem 1rem 1.5rem
  }
  .footer-bottom{padding:1rem}
  .section-title{font-size:1.6rem}
  .grid{grid-template-columns:1fr}
}
@media(max-width:480px){
  .btn-header-cta .cta-label-full{display:none}
  .brand-name{font-size:1.15rem}
}