/* ===== Reset & Variables ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
[hidden] {
  display: none !important;
}
:root {
  --bg-dark: #0A0E17;
  --bg-panel: #111827;
  --bg-elevated: #1F2937;
  --border-strong: #2D3748;
  --accent-primary: #00E5FF;
  --accent-secondary: #FF6B35;
  --accent-tertiary: #B44EFF;
  --text-primary: #F9FAFB;
  --text-secondary: #9CA3AF;
  --text-muted: #6B7280;
  --font-heading: 'Rajdhani', 'DIN Condensed', 'PingFang SC', 'Microsoft YaHei', 'Arial Narrow', sans-serif;
  --font-body: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-data: 'JetBrains Mono', 'SF Mono', monospace;
  --header-h: 64px;
  --radius: 2px;
  --transition: 260ms cubic-bezier(0.65, 0, 0.35, 1);
}
/* ===== Base & Typography ===== */
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  background-color: var(--bg-dark);
  background-image:
    linear-gradient(rgba(255,255,255,0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.015) 1px, transparent 1px);
  background-size: 40px 40px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}
body > main {
  flex: 1 0 auto;
}
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--text-primary);
  line-height: 1.1;
}
p {
  margin-bottom: 1em;
}
a {
  color: var(--accent-primary);
  text-decoration: none;
}
a:hover {
  color: var(--accent-secondary);
}
img, svg {
  display: block;
  max-width: 100%;
}
/* ===== Layout ===== */
.container-wide {
  width: min(calc(100% - 48px), 1440px);
  margin-inline: auto;
}
.container {
  width: min(calc(100% - 48px), 1280px);
  margin-inline: auto;
}
.grid {
  display: grid;
  gap: 28px;
}
.grid--2 {
  grid-template-columns: repeat(2, 1fr);
}
.grid--3 {
  grid-template-columns: repeat(3, 1fr);
}
.grid--4 {
  grid-template-columns: repeat(4, 1fr);
}
/* ===== Skip Link ===== */
.skip-link {
  position: fixed;
  top: -64px;
  left: 16px;
  z-index: 2000;
  padding: 10px 18px;
  background: var(--accent-primary);
  color: #0A0E17;
  font-weight: 600;
  border-radius: var(--radius);
  transition: top 0.2s ease;
  text-decoration: none;
}
.skip-link:focus {
  top: 12px;
  outline: 2px solid var(--text-primary);
  outline-offset: 2px;
}
/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(10, 14, 23, 0.88);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-strong);
}
.site-header::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0,229,255,0.5), rgba(255,107,53,0.5), transparent);
  pointer-events: none;
}
.site-header__inner {
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: var(--header-h);
  padding-top: 8px;
  padding-bottom: 8px;
}
.scroll-progress {
  position: absolute;
  top: 0;
  left: 0;
  height: 2px;
  width: 0%;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  z-index: 10;
  pointer-events: none;
  transition: width 120ms linear;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  color: var(--text-primary);
}
.brand__glyph {
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-tertiary));
  color: #0A0E17;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 20px;
  clip-path: polygon(0 8%, 100% 0, 92% 100%, 0 92%);
  line-height: 1;
}
.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}
.brand__text strong {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-primary);
  white-space: nowrap;
}
.brand__text small {
  font-family: var(--font-data);
  font-size: 0.62rem;
  color: var(--accent-primary);
  letter-spacing: 0.3em;
  text-transform: uppercase;
}
/* ===== Primary Nav ===== */
.primary-nav {
  margin-inline: auto;
}
.primary-nav__list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 2px;
}
.primary-nav__link {
  display: flex;
  align-items: center;
  gap: 6px;
  position: relative;
  padding: 10px 14px;
  color: var(--text-secondary);
  font-family: var(--font-heading);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.88rem;
  transition: color var(--transition), background var(--transition);
}
.primary-nav__index {
  font-family: var(--font-data);
  font-size: 0.68rem;
  color: var(--text-muted);
  transition: color var(--transition);
}
.primary-nav__label {
  white-space: nowrap;
}
.primary-nav__link:hover,
.primary-nav__link[aria-current="page"] {
  color: var(--text-primary);
}
.primary-nav__link:hover .primary-nav__index,
.primary-nav__link[aria-current="page"] .primary-nav__index {
  color: var(--accent-primary);
}
.primary-nav__link::after {
  content: '';
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 4px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform var(--transition);
}
.primary-nav__link:hover::after,
.primary-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
}
/* ===== Header Actions ===== */
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  flex-shrink: 0;
}
.quick-switch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid rgba(0, 229, 255, 0.35);
  border-radius: var(--radius);
  color: var(--accent-primary);
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
  white-space: nowrap;
}
.quick-switch:hover {
  background: rgba(0, 229, 255, 0.08);
  border-color: var(--accent-primary);
  box-shadow: 0 0 16px rgba(0, 229, 255, 0.12);
  color: var(--accent-primary);
}
.quick-switch__pulse {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-secondary);
  animation: pulse 2s ease-in-out infinite;
  flex-shrink: 0;
}
@keyframes pulse {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(255, 107, 53, 0.6);
  }
  50% {
    box-shadow: 0 0 0 6px rgba(255, 107, 53, 0);
  }
}
.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: transparent;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  color: var(--text-primary);
  cursor: pointer;
  transition: border-color var(--transition), color var(--transition);
  font-family: var(--font-heading);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.nav-toggle:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}
.nav-toggle__icon {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  width: 18px;
}
.nav-toggle__bar {
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}
.nav-toggle__text {
  display: none;
}
@media (min-width: 480px) {
  .nav-toggle__text {
    display: inline;
  }
}
/* ===== Footer ===== */
.site-footer {
  background: var(--bg-panel);
  border-top: 1px solid var(--border-strong);
  position: relative;
}
.site-footer__signal {
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-tertiary), var(--accent-secondary));
}
.site-footer__main {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 40px;
  padding-top: 56px;
  padding-bottom: 48px;
}
.site-footer__brand-block {
  max-width: 320px;
}
.brand--footer .brand__glyph {
  width: 42px;
  height: 42px;
  font-size: 22px;
}
.brand--footer .brand__text strong {
  font-size: 1.1rem;
}
.site-footer__statement {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-top: 16px;
}
.site-footer__heading {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-primary);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-strong);
  position: relative;
}
.site-footer__heading::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 28px;
  height: 2px;
  background: var(--accent-primary);
}
.site-footer__list,
.site-footer__contact-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.site-footer__list a,
.site-footer__contact-list a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: color var(--transition), padding-left var(--transition);
  position: relative;
}
.site-footer__list a:hover,
.site-footer__contact-list a:hover {
  color: var(--accent-primary);
  padding-left: 14px;
}
.site-footer__list a:hover::before,
.site-footer__contact-list a:hover::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--accent-primary);
}
.site-footer__contact-list {
  font-size: 0.9rem;
  color: var(--text-secondary);
}
.contact-label {
  display: inline-block;
  width: 36px;
  color: var(--text-muted);
  font-family: var(--font-data);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.site-footer__bottom {
  border-top: 1px solid var(--border-strong);
  background: var(--bg-dark);
}
.site-footer__bottom-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  padding-top: 16px;
  padding-bottom: 16px;
}
.site-footer__copyright,
.site-footer__note {
  font-size: 0.8rem;
  color: var(--text-muted);
}
/* ===== Back to Top ===== */
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  color: var(--text-secondary);
  cursor: pointer;
  font-family: var(--font-heading);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  z-index: 999;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}
.back-to-top:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  background: rgba(0, 229, 255, 0.06);
}
.back-to-top__icon {
  font-size: 1rem;
  line-height: 1;
}
/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition);
}
.btn--primary {
  background: var(--accent-primary);
  color: #0A0E17;
}
.btn--primary:hover {
  box-shadow: 0 0 20px rgba(0, 229, 255, 0.35);
  transform: translateY(-2px);
  color: #0A0E17;
}
.btn--ghost {
  border-color: var(--border-strong);
  color: var(--text-primary);
  background: transparent;
}
.btn--ghost:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}
.btn--secondary {
  background: transparent;
  border: 1px solid var(--accent-secondary);
  color: var(--accent-secondary);
}
.btn--secondary:hover {
  background: rgba(255, 107, 53, 0.1);
  box-shadow: 0 0 16px rgba(255, 107, 53, 0.2);
  color: var(--accent-secondary);
}
/* ===== Cards ===== */
.card {
  background: var(--bg-panel);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 24px;
  position: relative;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.card:hover {
  border-color: rgba(0, 229, 255, 0.4);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3), 0 0 12px rgba(0, 229, 255, 0.06);
}
.card__title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  margin-bottom: 8px;
}
.card__text {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 0;
}
/* ===== Section Titles ===== */
.section-kicker {
  display: block;
  font-family: var(--font-data);
  font-size: 0.8rem;
  color: var(--accent-primary);
  text-transform: uppercase;
  letter-spacing: 0.3em;
  margin-bottom: 8px;
}
.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  transform: skew(-3deg);
  color: var(--text-primary);
  line-height: 1.05;
  margin-bottom: 16px;
}
.section-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  height: 44px;
  padding: 0 12px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--accent-primary);
  transform: skew(-6deg);
  text-transform: uppercase;
}
/* ===== Breadcrumb ===== */
.breadcrumb__list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 12px 0;
}
.breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 0.85rem;
}
.breadcrumb__item + .breadcrumb__item::before {
  content: '/';
  color: var(--text-muted);
}
.breadcrumb__link {
  color: var(--text-secondary);
  transition: color var(--transition);
}
.breadcrumb__link:hover {
  color: var(--accent-primary);
}
.breadcrumb__item[aria-current="page"] {
  color: var(--text-primary);
}
/* ===== Image Shell ===== */
.img-shell {
  position: relative;
  overflow: hidden;
  background: var(--bg-panel);
  border: 1px solid var(--border-strong);
  aspect-ratio: 3 / 2;
}
.img-shell--16x9 {
  aspect-ratio: 16 / 9;
}
.img-shell--4x3 {
  aspect-ratio: 4 / 3;
}
.img-shell--1x1 {
  aspect-ratio: 1 / 1;
}
.img-shell::before {
  content: attr(data-label);
  position: absolute;
  inset: 0;
  z-index: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    linear-gradient(135deg, rgba(0, 229, 255, 0.05) 25%, transparent 25%) 0 0 / 24px 24px,
    linear-gradient(315deg, rgba(255, 107, 53, 0.05) 25%, transparent 25%) 0 0 / 24px 24px,
    var(--bg-panel);
  color: var(--text-muted);
  font-family: var(--font-data);
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
}
.img-shell img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
/* ===== Prose ===== */
.prose {
  max-width: 72ch;
}
.prose h2,
.prose h3,
.prose h4 {
  margin-top: 2em;
  margin-bottom: 0.8em;
}
.prose p {
  margin-bottom: 1.2em;
  color: var(--text-secondary);
}
.prose strong {
  color: var(--text-primary);
}
.prose ul,
.prose ol {
  margin-bottom: 1.2em;
  padding-left: 1.4em;
  color: var(--text-secondary);
}
/* ===== Filter Protocol ===== */
[data-filter-trigger] {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-family: var(--font-heading);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: all var(--transition);
}
[data-filter-trigger]:hover {
  border-color: var(--accent-primary);
  color: var(--text-primary);
}
[data-filter-trigger].is-active {
  background: rgba(0, 229, 255, 0.1);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  box-shadow: 0 0 12px rgba(0, 229, 255, 0.15);
}
/* ===== Focus & Motion ===== */
:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 3px;
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}
/* ===== Responsive ===== */
@media (max-width: 1023px) {
  .primary-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border-strong);
    padding: 12px 20px 20px;
    transform: translateY(-10px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
    z-index: 999;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.4);
    margin-inline: 0;
  }
  .primary-nav[data-open] {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  .primary-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }
  .primary-nav__link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    font-size: 1rem;
    border-left: 2px solid transparent;
    color: var(--text-secondary);
  }
  .primary-nav__link::after {
    display: none;
  }
  .primary-nav__link[aria-current="page"] {
    border-left-color: var(--accent-primary);
    background: rgba(0, 229, 255, 0.05);
    color: var(--text-primary);
  }
  .primary-nav__link[aria-current="page"] .primary-nav__index {
    color: var(--accent-primary);
  }
  .site-footer__main {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .site-footer__brand-block {
    grid-column: 1 / -1;
  }
}
@media (max-width: 767px) {
  .container, .container-wide {
    width: calc(100% - 32px);
  }
  .quick-switch__label {
    display: none;
  }
  .quick-switch {
    padding: 8px 10px;
  }
  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 639px) {
  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }
  .site-footer__main {
    grid-template-columns: 1fr;
    gap: 28px;
    padding-top: 40px;
    padding-bottom: 36px;
  }
  .site-footer__bottom-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .brand__text small {
    letter-spacing: 0.2em;
  }
  .back-to-top {
    right: 16px;
    bottom: 16px;
    padding: 8px 12px;
  }
}
@media (min-width: 1024px) {
  .nav-toggle {
    display: none;
  }
}
@media (min-width: 768px) {
  .grid--4 {
    grid-template-columns: repeat(4, 1fr);
  }
  .grid--3 {
    grid-template-columns: repeat(3, 1fr);
  }
}