:root {
  --color-primary: #0B1D3A;
  --color-accent: #FF6B35;
  --color-silver: #C0C0C0;
  --color-warm-paper: #F5F0E1;
  --color-dark-ink: #1A1A1A;
  --color-dynamic-blue: #1E90FF;
  --color-signal-green: #00E676;
  --color-warning-red: #FF1744;
  --color-white: #FFFFFF;
  --color-bg: #0B1D3A;
  --font-heading: 'Oswald', 'Arial Black', 'Helvetica Neue', sans-serif;
  --font-body: 'Merriweather', 'Noto Serif SC', 'Georgia', serif;
  --font-index: 'Courier New', 'Consolas', monospace;
  --font-size-h1: clamp(2.2rem, 5vw, 3.8rem);
  --font-size-h2: clamp(1.6rem, 3.5vw, 2.8rem);
  --font-size-h3: clamp(1.2rem, 2.5vw, 1.8rem);
  --font-size-body: clamp(0.95rem, 1.2vw, 1.1rem);
  --font-size-small: 0.85rem;
  --font-size-index: 0.8rem;
  --line-height-body: 1.6;
  --line-height-heading: 1.15;
  --spacing-xs: 0.35rem;
  --spacing-sm: 0.65rem;
  --spacing-md: 1.2rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3.5rem;
  --max-width: 1280px;
  --header-height: 70px;
  --border-radius: 4px;
  --transition-speed: 0.25s;
  --focus-outline: 2px solid var(--color-dynamic-blue);
  --focus-offset: 3px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--font-size-body);
  line-height: var(--line-height-body);
  color: var(--color-silver);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

:focus-visible {
  outline: var(--focus-outline);
  outline-offset: var(--focus-offset);
}

::selection {
  background: var(--color-accent);
  color: var(--color-dark-ink);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-dynamic-blue);
  text-decoration: none;
  transition: color var(--transition-speed) ease;
}

a:hover {
  color: var(--color-accent);
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: var(--line-height-heading);
  color: var(--color-white);
  letter-spacing: 0.02em;
}

h1 { font-size: var(--font-size-h1); }
h2 { font-size: var(--font-size-h2); }
h3 { font-size: var(--font-size-h3); }

p {
  margin-bottom: var(--spacing-md);
  color: var(--color-silver);
}

/* ------- Skip Link ------- */
.skip-link {
  position: absolute;
  top: -999px;
  left: var(--spacing-sm);
  z-index: 10000;
  background: var(--color-accent);
  color: var(--color-dark-ink);
  font-family: var(--font-heading);
  font-weight: 700;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--border-radius);
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: var(--spacing-sm);
}

/* ------- Header ------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 9000;
  background: var(--color-primary);
  border-bottom: 2px solid rgba(255,107,53,0.3);
  height: var(--header-height);
  display: flex;
  align-items: center;
}

.header-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  height: 100%;
}

.brand {
  display: flex;
  align-items: center;
  z-index: 2;
}

.brand-link {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  transition: opacity 0.2s ease;
}

.brand-link:hover {
  opacity: 0.88;
}

.brand-name {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--color-accent);
  letter-spacing: 0.04em;
  line-height: 1;
}

.brand-tagline {
  font-family: var(--font-index);
  font-size: 0.7rem;
  color: var(--color-silver);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-top: 2px;
}

/* ------- Speed line decoration ------- */
.header-speed {
  position: absolute;
  left: 35%;
  top: 0;
  width: 120px;
  height: 100%;
  pointer-events: none;
  overflow: hidden;
  opacity: 0.25;
}

.header-speed::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  width: 200%;
  height: 2px;
  background: linear-gradient(90deg, transparent 0%, var(--color-accent) 40%, var(--color-dynamic-blue) 70%, transparent 100%);
  transform: translateY(-50%) skewX(-35deg);
  animation: speedPulse 2.8s ease-in-out infinite;
}

@keyframes speedPulse {
  0%, 100% { opacity: 0.3; transform: translateY(-50%) skewX(-35deg) scaleX(1); }
  50% { opacity: 0.9; transform: translateY(-50%) skewX(-35deg) scaleX(1.4); }
}

/* ------- Navigation Toggle (mobile) ------- */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 2px solid var(--color-accent);
  border-radius: var(--border-radius);
  cursor: pointer;
  gap: 5px;
  padding: 8px;
  z-index: 100;
  transition: border-color 0.2s ease;
}

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

.nav-toggle-line {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-accent);
  transition: transform 0.3s ease, opacity 0.3s ease;
  border-radius: 1px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ------- Site Nav ------- */
.site-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  gap: var(--spacing-xs);
  align-items: center;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: block;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-silver);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.nav-link:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.nav-link[aria-current="page"] {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

/* ------- Footer ------- */
.site-footer {
  background: var(--color-dark-ink);
  border-top: 3px solid var(--color-accent);
  padding: var(--spacing-xl) var(--spacing-lg) var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: var(--spacing-lg);
  max-width: var(--max-width);
  margin: 0 auto;
}

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

.footer-brand-link {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.6rem;
  color: var(--color-accent);
  text-decoration: none;
  transition: opacity 0.2s ease;
}

.footer-brand-link:hover {
  opacity: 0.8;
}

.footer-tagline {
  font-family: var(--font-index);
  font-size: 0.75rem;
  color: var(--color-silver);
  letter-spacing: 0.12em;
  margin-top: var(--spacing-xs);
  text-transform: uppercase;
}

.footer-links,
.footer-contact,
.footer-icp {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.footer-links-label,
.footer-contact-label {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--spacing-xs);
}

.footer-link {
  font-size: var(--font-size-small);
  color: var(--color-silver);
  text-decoration: none;
  transition: color 0.2s ease;
  padding: 2px 0;
}

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

.footer-phone,
.footer-email {
  font-family: var(--font-index);
  font-size: var(--font-size-small);
  color: var(--color-silver);
  word-break: break-all;
}

.footer-icp-id,
.footer-address,
.footer-year {
  font-family: var(--font-index);
  font-size: 0.75rem;
  color: var(--color-silver);
  opacity: 0.7;
}

.footer-year {
  margin-top: var(--spacing-xs);
}

/* ------- Progress Bar ------- */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-dynamic-blue));
  z-index: 9999;
  width: 0%;
  transition: width 0.1s linear;
  pointer-events: none;
}

/* ------- Buttons ------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 2px solid transparent;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all 0.25s ease;
  background: transparent;
  color: var(--color-white);
  text-decoration: none;
  min-height: 44px;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(255,107,53,0.25);
}

.btn-primary {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-dark-ink);
}

.btn-primary:hover {
  background: transparent;
  color: var(--color-accent);
}

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

.btn-accent:hover {
  background: var(--color-dynamic-blue);
  color: var(--color-white);
}

/* ------- Card System ------- */
.card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(192,192,192,0.15);
  border-radius: var(--border-radius);
  padding: var(--spacing-md);
  transition: all 0.3s ease;
}

.card:hover {
  border-color: var(--color-accent);
  background: rgba(255,107,53,0.06);
  box-shadow: 0 4px 20px rgba(255,107,53,0.12);
}

.card-panel {
  clip-path: polygon(0% 0%, 100% 0%, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0% 100%);
  background: var(--color-warm-paper);
  color: var(--color-dark-ink);
  padding: var(--spacing-lg);
  border: none;
}

.card-panel h1,
.card-panel h2,
.card-panel h3 {
  color: var(--color-dark-ink);
}

.card-panel p {
  color: #2a2a2a;
}

/* ------- Breadcrumb ------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  align-items: center;
  font-family: var(--font-index);
  font-size: 0.8rem;
  color: var(--color-silver);
  padding: var(--spacing-sm) 0;
  margin-bottom: var(--spacing-md);
}

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

.breadcrumb a:hover {
  color: var(--color-accent);
}

.breadcrumb .breadcrumb-sep {
  color: var(--color-accent);
  margin: 0 var(--spacing-xs);
  font-weight: 700;
}

.breadcrumb .breadcrumb-current {
  color: var(--color-accent);
  font-weight: 600;
}

/* ------- Grid ------- */
.grid {
  display: grid;
  gap: var(--spacing-md);
}

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

/* ------- Speed Line Decor ------- */
.speed-line {
  position: relative;
  overflow: hidden;
}

.speed-line::before {
  content: '';
  position: absolute;
  top: 50%;
  left: -20%;
  width: 140%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
  transform: skewX(-45deg);
  opacity: 0.2;
  pointer-events: none;
}

/* ------- Tag Index ------- */
.tag-index {
  font-family: var(--font-index);
  font-size: var(--font-size-index);
  color: var(--color-accent);
  background: rgba(255,107,53,0.1);
  padding: 2px 8px;
  border-left: 2px solid var(--color-accent);
  display: inline-block;
  letter-spacing: 0.04em;
}

/* ------- Section Title ------- */
.section-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--font-size-h2);
  color: var(--color-white);
  position: relative;
  padding-bottom: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 3px;
  background: var(--color-accent);
}

/* ------- Content Container ------- */
.content-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* ------- Text Utilities ------- */
.text-accent { color: var(--color-accent); }
.text-silver { color: var(--color-silver); }
.text-warm { color: var(--color-warm-paper); }
.text-center { text-align: center; }
.text-uppercase { text-transform: uppercase; letter-spacing: 0.06em; }
.font-index { font-family: var(--font-index); }

/* ------- Responsive ------- */
@media (max-width: 1024px) {
  .header-speed {
    left: 28%;
    width: 80px;
  }
  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
  }
  .nav-link {
    font-size: 0.85rem;
    padding: var(--spacing-xs) 0.4rem;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 62px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    height: auto;
    max-height: 0;
    overflow: hidden;
    background: var(--color-primary);
    border-bottom: 2px solid var(--color-accent);
    transition: max-height 0.4s ease, opacity 0.3s ease;
    opacity: 0;
    box-shadow: 0 8px 24px rgba(0,0,0,0.5);
  }

  .site-nav[data-open] {
    max-height: 420px;
    opacity: 1;
  }

  .nav-list {
    flex-direction: column;
    padding: var(--spacing-sm) var(--spacing-md);
    gap: 0;
  }

  .nav-item {
    width: 100%;
  }

  .nav-link {
    width: 100%;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid rgba(192,192,192,0.1);
    font-size: 1rem;
  }

  .nav-link[aria-current="page"] {
    border-bottom-color: var(--color-accent);
  }

  .header-speed {
    display: none;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    text-align: center;
  }

  .footer-links,
  .footer-contact,
  .footer-icp {
    align-items: center;
  }

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

  .content-container {
    padding: 0 var(--spacing-md);
  }

  .header-inner {
    padding: 0 var(--spacing-md);
  }
}

@media (max-width: 480px) {
  .brand-name {
    font-size: 1.2rem;
  }
  .brand-tagline {
    font-size: 0.6rem;
  }
  nav-link {
    font-size: 0.9rem;
  }
}

/* ------- Reduced Motion ------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .header-speed::after {
    animation: none;
    opacity: 0.3;
  }
  .progress-bar {
    transition: none;
  }
  .btn:hover {
    transform: none;
  }
  .card:hover {
    transform: none;
  }
  .site-nav {
    transition: none;
  }
}