:root {
  --color-neon-green: #39FF14;
  --color-electric-blue: #00BFFF;
  --color-fire-orange: #FF4500;
  --color-bg-dark: #0D0D0D;
  --color-bg-medium: #1A1A1A;
  --color-border: #333333;
  --color-text-white: #FFFFFF;
  --color-text-gray: #888888;
  --color-text-muted: #666666;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  font-size: 16px;
}
body {
  background-color: var(--color-bg-dark);
  color: var(--color-text-white);
  font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  overflow-x: hidden;
}
ul, ol {
  list-style: none;
}
a {
  color: inherit;
  text-decoration: none;
}
:focus-visible {
  outline: 2px solid var(--color-neon-green);
  outline-offset: 4px;
}
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  z-index: 9999;
  background: var(--color-neon-green);
  color: var(--color-bg-dark);
  padding: 0.5rem 1rem;
  font-family: 'Orbitron', sans-serif;
  font-weight: 700;
  transition: top 0.2s;
  text-transform: uppercase;
}
.skip-link:focus {
  top: 0;
}
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 64px;
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  background-color: var(--color-bg-medium);
  border-right: 1px solid var(--color-border);
  z-index: 1000;
  padding-top: 1rem;
  transition: width 0.3s ease, transform 0.3s ease;
}
.brand-logo {
  display: block;
  writing-mode: vertical-rl;
  font-family: 'Orbitron', sans-serif;
  font-weight: 900;
  font-size: 1.2rem;
  letter-spacing: 0.2em;
  background: linear-gradient(135deg, var(--color-neon-green), var(--color-electric-blue), var(--color-fire-orange));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  padding: 0.5rem 0.25rem;
  margin-bottom: 2rem;
  text-orientation: mixed;
}
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  margin: 0.5rem 0;
}
.nav-toggle-icon,
.nav-toggle-icon::before,
.nav-toggle-icon::after {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-white);
  transition: transform 0.3s ease;
  content: '';
}
.nav-toggle-icon::before {
  transform: translateY(-7px);
}
.nav-toggle-icon::after {
  transform: translateY(5px);
}
.site-nav {
  flex: 1;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 0.25rem;
}
.nav-list {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  width: 100%;
  align-items: center;
}
.nav-link {
  display: block;
  writing-mode: vertical-rl;
  font-family: 'Orbitron', sans-serif;
  font-weight: 700;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--color-text-gray);
  padding: 0.5rem 0.2rem;
  border-left: 2px solid transparent;
  transition: color 0.3s, border-color 0.3s, transform 0.2s;
  text-orientation: mixed;
}
.nav-link:hover,
.nav-link:focus-visible {
  color: var(--color-neon-green);
  border-left-color: var(--color-neon-green);
  transform: translateX(2px);
}
.nav-link[aria-current="page"] {
  color: var(--color-neon-green);
  border-left-color: var(--color-neon-green);
  font-weight: 900;
  text-shadow: 0 0 8px rgba(57, 255, 20, 0.5);
}
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-neon-green), var(--color-electric-blue), var(--color-fire-orange));
  z-index: 1001;
  transition: width 0.1s linear;
}
[data-mouse-trail] {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}
.main-content {
  margin-left: 64px;
  min-height: 100vh;
  position: relative;
  z-index: 1;
}
.site-footer {
  background-color: var(--color-bg-medium);
  border-top: 1px solid var(--color-border);
  padding: 2rem 1rem;
  margin-left: 64px;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.footer-brand .brand-logo {
  writing-mode: horizontal-tb;
  font-size: 1.5rem;
  margin-bottom: 0.25rem;
  display: inline-block;
}
.footer-tagline {
  color: var(--color-text-gray);
  font-size: 0.9rem;
  letter-spacing: 0.05em;
}
.footer-links {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.footer-link {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-text-gray);
  letter-spacing: 0.05em;
  transition: color 0.3s;
}
.footer-link:hover,
.footer-link:focus-visible {
  color: var(--color-neon-green);
}
.footer-contact {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  color: var(--color-text-gray);
  font-size: 0.85rem;
}
.footer-meta {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  color: var(--color-text-muted);
  font-size: 0.75rem;
  border-top: 1px solid var(--color-border);
  padding-top: 1rem;
}
@media (max-width: 768px) {
  .site-header {
    width: 100%;
    height: 56px;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding: 0 1rem;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }
  .brand-logo {
    writing-mode: horizontal-tb;
    font-size: 1.2rem;
    margin-bottom: 0;
    padding: 0;
  }
  .nav-toggle {
    display: block;
  }
  .site-nav {
    position: fixed;
    top: 56px;
    left: 0;
    width: 100%;
    height: calc(100vh - 56px);
    background-color: var(--color-bg-dark);
    border-right: 1px solid var(--color-border);
    padding: 2rem 1rem;
    transform: translateX(-100%);
    transition: transform 0.3s ease, visibility 0.3s;
    visibility: hidden;
    align-items: flex-start;
  }
  .site-nav[data-open] {
    transform: translateX(0);
    visibility: visible;
  }
  .nav-list {
    align-items: flex-start;
    gap: 1.5rem;
  }
  .nav-link {
    writing-mode: horizontal-tb;
    font-size: 1rem;
    border-left: none;
    border-bottom: 2px solid transparent;
    padding: 0.5rem 0;
  }
  .nav-link:hover,
  .nav-link:focus-visible {
    border-left-color: transparent;
    border-bottom-color: var(--color-neon-green);
    transform: none;
  }
  .nav-link[aria-current="page"] {
    border-left-color: transparent;
    border-bottom-color: var(--color-neon-green);
  }
  .main-content {
    margin-left: 0;
    padding-top: 56px;
  }
  .site-footer {
    margin-left: 0;
  }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html {
    scroll-behavior: auto;
  }
}