*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root{
  --bg-deep:#0A0E17;
  --bg-panel:#111827;
  --bg-elevated:#1A2332;
  --accent-orange:#FF6B00;
  --accent-blue:#00B4FF;
  --silver:#C0C7D1;
  --text-muted:#8A94A6;
  --text-white:#F8FAFC;
  --border-line:#2A3441;
  --success-green:#00E07A;
  --font-display:"Archivo","Noto Sans SC","PingFang SC",sans-serif;
  --font-body:"Roboto Mono","Noto Sans SC","Microsoft YaHei",monospace;
  --header-w:300px;
  --content-max:1280px;
  --radius-lg:24px;
  --radius-pill:999px;
  --transition:240ms cubic-bezier(.4,0,.2,1);
}

html{
  scroll-behavior:smooth;
}

body{
  background:var(--bg-deep);
  color:var(--text-white);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.6;
  min-height:100vh;
  overflow-x:hidden;
}

::selection{
  background:var(--accent-orange);
  color:var(--bg-deep);
}

:focus-visible{
  outline:2px solid var(--accent-blue);
  outline-offset:3px;
}

.sr-only{
  position:absolute;
  width:1px;
  height:1px;
  padding:0;
  margin:-1px;
  overflow:hidden;
  clip:rect(0,0,0,0);
  white-space:nowrap;
  border:0;
}

.skip-link{
  position:fixed;
  top:-60px;
  left:16px;
  z-index:1200;
  padding:10px 16px;
  background:var(--accent-blue);
  color:var(--bg-deep);
  border-radius:var(--radius-pill);
  font-family:var(--font-display);
  font-weight:700;
  text-decoration:none;
  transition:top var(--transition);
}

.skip-link:focus{
  top:16px;
}

.site-main{
  margin-left:var(--header-w);
  min-height:100vh;
}

.site-header{
  position:fixed;
  top:0;
  left:0;
  bottom:0;
  width:var(--header-w);
  z-index:1000;
  display:flex;
  flex-direction:column;
  gap:24px;
  padding:24px 20px;
  background:linear-gradient(180deg,rgba(17,24,37,.98) 0%,rgba(10,14,23,.98) 100%);
  border-right:1px solid var(--border-line);
  overflow-y:auto;
}

.site-header::before{
  content:"";
  position:absolute;
  top:0;
  right:0;
  width:64px;
  height:4px;
  background:linear-gradient(90deg,var(--accent-orange),var(--accent-blue));
  border-radius:0 0 4px 4px;
  opacity:.8;
}

.header-brand{
  display:flex;
  flex-direction:column;
  gap:16px;
  margin-bottom:8px;
}

.brand{
  display:flex;
  align-items:center;
  gap:12px;
  text-decoration:none;
  color:var(--text-white);
}

.brand-mark{
  flex:0 0 auto;
  width:48px;
  height:48px;
  display:flex;
  align-items:center;
  justify-content:center;
  background:linear-gradient(135deg,var(--accent-orange),#ff9a40);
  color:var(--bg-deep);
  font-family:var(--font-display);
  font-weight:800;
  font-size:18px;
  border-radius:14px 14px 14px 4px;
  box-shadow:0 8px 24px rgba(255,107,0,.3);
}

.brand-text{
  display:flex;
  flex-direction:column;
  gap:2px;
}

.brand-title{
  font-family:var(--font-display);
  font-size:20px;
  font-weight:800;
  line-height:1.2;
  letter-spacing:.02em;
}

.brand-sub{
  font-size:11px;
  letter-spacing:.22em;
  color:var(--text-muted);
  text-transform:uppercase;
  white-space:nowrap;
}

.header-tagline{
  font-family:var(--font-display);
  font-size:13px;
  color:var(--text-muted);
  letter-spacing:.14em;
  border-left:3px solid var(--accent-blue);
  padding-left:10px;
}

.site-nav{
  display:flex;
  flex-direction:column;
  gap:8px;
}

.nav-link{
  position:relative;
  display:flex;
  align-items:center;
  padding:12px 18px;
  border-radius:var(--radius-pill);
  color:var(--text-muted);
  text-decoration:none;
  font-family:var(--font-display);
  font-size:15px;
  font-weight:600;
  letter-spacing:.04em;
  border:1px solid transparent;
  transition:background var(--transition),color var(--transition),border-color var(--transition),transform var(--transition);
}

.nav-link::after{
  content:"";
  position:absolute;
  right:14px;
  top:50%;
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--accent-blue);
  opacity:0;
  transform:translateY(-50%) scale(.5);
  transition:opacity var(--transition),transform var(--transition);
}

.nav-link:hover{
  color:var(--text-white);
  background:rgba(255,107,0,.1);
  border-color:rgba(255,107,0,.25);
  transform:translateX(4px);
}

.nav-link:hover::after{
  opacity:1;
  transform:translateY(-50%) scale(1);
}

.nav-link[aria-current="page"]{
  color:var(--bg-deep);
  background:linear-gradient(135deg,var(--accent-orange),#ff8733);
  border-color:transparent;
  box-shadow:0 6px 20px rgba(255,107,0,.35);
}

.nav-link[aria-current="page"]::after{
  background:var(--bg-deep);
  opacity:1;
  transform:translateY(-50%) scale(1);
}

.header-status{
  margin-top:auto;
  display:flex;
  align-items:center;
  gap:8px;
  padding-top:16px;
  border-top:1px solid var(--border-line);
  color:var(--text-muted);
  font-size:12px;
  letter-spacing:.1em;
}

.status-dot{
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--success-green);
  box-shadow:0 0 10px rgba(0,224,122,.6);
  animation:pulse 2s infinite;
}

.status-text{
  white-space:nowrap;
}

@keyframes pulse{
  0%,100%{opacity:1}
  50%{opacity:.45}
}

.scroll-progress{
  position:absolute;
  left:0;
  top:0;
  bottom:0;
  width:3px;
  background:linear-gradient(180deg,var(--accent-orange),var(--accent-blue));
  transform-origin:top;
  transform:scaleY(var(--scroll,0));
  opacity:.8;
}

.nav-toggle{
  display:none;
}

.site-footer{
  margin-left:var(--header-w);
  background:linear-gradient(180deg,transparent,rgba(17,24,37,.6)),var(--bg-deep);
  border-top:1px solid var(--border-line);
  position:relative;
  padding:48px 0 24px;
}

.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;
  left:0;
  right:0;
  height:2px;
  background:linear-gradient(90deg,var(--accent-orange),var(--accent-blue),transparent);
  opacity:.7;
}

.footer-inner{
  max-width:var(--content-max);
  margin:0 auto;
  padding:0 32px;
  display:grid;
  grid-template-columns:1.2fr 1fr 1.5fr;
  gap:40px;
}

.footer-brand{
  display:flex;
  flex-direction:column;
  gap:8px;
}

.footer-brand-name{
  font-family:var(--font-display);
  font-size:22px;
  font-weight:800;
  line-height:1.2;
}

.footer-brand-en{
  font-size:11px;
  letter-spacing:.2em;
  color:var(--text-muted);
  text-transform:uppercase;
}

.footer-tagline{
  color:var(--text-muted);
  font-size:13px;
}

.footer-nav{
  display:flex;
  flex-direction:column;
  gap:10px;
}

.footer-link{
  color:var(--text-muted);
  text-decoration:none;
  font-size:14px;
  transition:color var(--transition);
}

.footer-link:hover{
  color:var(--accent-orange);
}

.footer-contact{
  display:flex;
  flex-direction:column;
  gap:6px;
  font-size:13px;
  color:var(--text-muted);
}

.footer-contact-line{
  margin:0;
}

.footer-bottom{
  grid-column:1 / -1;
  margin-top:32px;
  padding-top:20px;
  border-top:1px solid var(--border-line);
  display:flex;
  justify-content:space-between;
  gap:16px;
  font-size:12px;
  color:var(--text-muted);
}

.container{
  max-width:var(--content-max);
  margin:0 auto;
  padding:0 32px;
}

.display-title{
  font-family:var(--font-display);
  font-size:clamp(44px,6vw,72px);
  font-weight:800;
  line-height:.95;
  letter-spacing:-.02em;
}

.section-title{
  font-family:var(--font-display);
  font-size:32px;
  font-weight:800;
  line-height:1.1;
  letter-spacing:-.01em;
}

.section-kicker{
  color:var(--accent-blue);
  text-transform:uppercase;
  letter-spacing:.2em;
  font-size:13px;
  font-family:var(--font-display);
  font-weight:600;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:10px 20px;
  border-radius:var(--radius-pill);
  font-family:var(--font-display);
  font-size:14px;
  font-weight:600;
  letter-spacing:.04em;
  text-decoration:none;
  border:1px solid transparent;
  cursor:pointer;
  transition:background var(--transition),border-color var(--transition),box-shadow var(--transition),transform var(--transition);
}

.btn-primary{
  background:var(--accent-orange);
  color:var(--bg-deep);
  box-shadow:0 6px 20px rgba(255,107,0,.25);
}

.btn-primary:hover{
  background:#ff8733;
  transform:translateY(-2px);
  box-shadow:0 10px 24px rgba(255,107,0,.35);
}

.btn-secondary{
  background:transparent;
  border-color:var(--accent-blue);
  color:var(--accent-blue);
}

.btn-secondary:hover{
  background:rgba(0,180,255,.1);
  transform:translateY(-2px);
}

.badge{
  display:inline-flex;
  align-items:center;
  padding:4px 10px;
  border-radius:var(--radius-pill);
  background:var(--bg-elevated);
  border:1px solid var(--border-line);
  color:var(--text-muted);
  font-size:12px;
  letter-spacing:.08em;
  font-family:var(--font-display);
}

.badge--accent{
  background:rgba(255,107,0,.12);
  border-color:rgba(255,107,0,.3);
  color:var(--accent-orange);
}

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  list-style:none;
  font-size:13px;
  color:var(--text-muted);
}

.breadcrumb-item + .breadcrumb-item::before{
  content:"/";
  margin-right:8px;
  color:var(--border-line);
}

.breadcrumb-item a{
  color:var(--accent-blue);
  text-decoration:none;
}

.breadcrumb-item a:hover{
  color:var(--text-white);
}

.breadcrumb-item[aria-current="page"]{
  color:var(--text-white);
}

.grid{
  display:grid;
  gap:24px;
}

.grid--2{
  grid-template-columns:repeat(2,1fr);
}

.grid--3{
  grid-template-columns:repeat(3,1fr);
}

.grid--4{
  grid-template-columns:repeat(4,1fr);
}

.data-card{
  background:var(--bg-elevated);
  border:1px solid var(--border-line);
  border-radius:var(--radius-lg);
  padding:24px;
  position:relative;
  transition:transform var(--transition),border-color var(--transition),box-shadow var(--transition);
}

.data-card:hover{
  transform:translateY(-4px);
  border-color:rgba(255,107,0,.3);
  box-shadow:0 12px 30px rgba(0,0,0,.3);
}

.media-frame{
  position:relative;
  border-radius:var(--radius-lg);
  overflow:hidden;
  background:var(--bg-elevated);
  border:1px solid var(--border-line);
  aspect-ratio:16 / 9;
}

.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(.9) contrast(1.05);
  transition:transform var(--transition);
}

.media-frame:hover img{
  transform:scale(1.03) rotate(.5deg);
}

.media-frame--placeholder{
  display:flex;
  align-items:center;
  justify-content:center;
  min-height:180px;
  background:
    linear-gradient(135deg,rgba(255,107,0,.08),rgba(0,180,255,.08)),
    repeating-linear-gradient(45deg,transparent,transparent 12px,rgba(255,255,255,.02) 12px,rgba(255,255,255,.02) 24px),
    var(--bg-elevated);
}

.media-frame--placeholder::after{
  content:attr(data-label);
  color:var(--text-muted);
  font-family:var(--font-display);
  font-size:14px;
  letter-spacing:.1em;
  text-transform:uppercase;
}

.divider{
  height:1px;
  border:0;
  background:linear-gradient(90deg,var(--border-line),transparent);
  margin:32px 0;
}

.divider--glow{
  height:2px;
  border:0;
  background:linear-gradient(90deg,var(--accent-orange),var(--accent-blue),transparent);
  border-radius:2px;
  margin:32px 0;
}

@media (max-width:1024px){
  .site-main,
  .site-footer{
    margin-left:0;
  }

  .site-header{
    position:fixed;
    top:0;
    left:0;
    right:0;
    bottom:auto;
    width:auto;
    height:64px;
    flex-direction:row;
    align-items:center;
    gap:0;
    padding:0 16px;
    border-right:none;
    border-bottom:1px solid var(--border-line);
    overflow:visible;
  }

  .site-header::before{
    display:none;
  }

  .header-brand{
    flex-direction:row;
    align-items:center;
    gap:12px;
    margin-bottom:0;
  }

  .brand-mark{
    width:36px;
    height:36px;
    font-size:14px;
    border-radius:10px 10px 10px 3px;
  }

  .brand-sub,
  .header-tagline{
    display:none;
  }

  .nav-toggle{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    width:44px;
    height:44px;
    margin-left:auto;
    background:transparent;
    border:1px solid var(--border-line);
    border-radius:var(--radius-pill);
    color:var(--text-white);
    cursor:pointer;
    transition:border-color var(--transition);
  }

  .nav-toggle:hover{
    border-color:var(--accent-blue);
  }

  .nav-toggle-icon{
    position:relative;
    width:18px;
    height:2px;
    background:currentColor;
    box-shadow:0 6px 0 currentColor,0 -6px 0 currentColor;
    transition:background var(--transition),box-shadow var(--transition);
  }

  .nav-toggle-icon::before,
  .nav-toggle-icon::after{
    content:"";
    position:absolute;
    top:0;
    left:0;
    width:18px;
    height:2px;
    background:currentColor;
    opacity:0;
    transition:opacity var(--transition),transform var(--transition);
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle-icon{
    background:transparent;
    box-shadow:none;
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle-icon::before{
    opacity:1;
    transform:rotate(45deg);
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle-icon::after{
    opacity:1;
    transform:rotate(-45deg);
  }

  .site-nav{
    position:absolute;
    top:64px;
    left:0;
    right:0;
    background:var(--bg-panel);
    border-bottom:1px solid var(--border-line);
    padding:12px 16px 20px;
    flex-direction:column;
    gap:8px;
    opacity:0;
    pointer-events:none;
    transform:translateY(-8px);
    transition:opacity var(--transition),transform var(--transition);
  }

  .site-nav[data-open]{
    opacity:1;
    pointer-events:auto;
    transform:translateY(0);
  }

  .nav-link::after{
    display:none;
  }

  .header-status{
    display:none;
  }

  .scroll-progress{
    left:0;
    top:auto;
    bottom:0;
    right:0;
    width:auto;
    height:3px;
    background:linear-gradient(90deg,var(--accent-orange),var(--accent-blue));
    transform-origin:left;
    transform:scaleX(var(--scroll,0));
  }

  .footer-inner{
    grid-template-columns:1fr;
    gap:24px;
  }

  .footer-bottom{
    flex-direction:column;
    justify-content:center;
    text-align:center;
  }

  .grid--3,
  .grid--4{
    grid-template-columns:repeat(2,1fr);
  }
}

@media (max-width:640px){
  :root{
    --content-max:none;
  }

  .container{
    padding:0 20px;
  }

  .brand-title{
    font-size:18px;
  }

  .footer-inner{
    padding:0 20px;
  }

  .grid--2,
  .grid--3,
  .grid--4{
    grid-template-columns:1fr;
  }

  .display-title{
    font-size:38px;
  }

  .section-title{
    font-size:26px;
  }
}

@media (prefers-reduced-motion: reduce){
  *,
  *::before,
  *::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }
}