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

:root {
  --c-bg: #0A1128;
  --c-panel: #101B3E;
  --c-overlay: #1A274D;
  --c-accent: #00E5A0;
  --c-accent-2: #FF7A1A;
  --c-danger: #FF3B5C;
  --c-text: #F0F4FF;
  --c-text-dim: #A3B0CC;
  --c-grid: #2A3B66;
  --c-index: #1A2B5E;
  --font-heading: 'Oswald', 'Impact', 'Arial Narrow', 'Arial', sans-serif;
  --font-body: 'Inter', 'Roboto', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', 'Liberation Mono', monospace;
  --container: 1280px;
  --header-h: 68px;
  --body-size: 15px;
  --ease: 0.2s ease;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: var(--body-size);
  line-height: 1.65;
  color: var(--c-text);
  background-color: var(--c-bg);
  background-image:
    linear-gradient(rgba(42, 59, 102, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(42, 59, 102, 0.06) 1px, transparent 1px);
  background-size: 40px 40px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
  color: var(--c-text);
}

p {
  margin-bottom: 1em;
}

a {
  color: var(--c-accent);
  text-decoration: none;
  transition: color var(--ease), background-color var(--ease), border-color var(--ease);
}

a:hover {
  color: var(--c-text);
  text-decoration: underline;
  text-underline-offset: 4px;
}

ul, ol {
  list-style: none;
}

img, svg {
  display: block;
  max-width: 100%;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

button {
  background: none;
  border: none;
  cursor: pointer;
}

a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--c-accent-2);
  outline-offset: 3px;
}

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

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.mono {
  font-family: var(--font-mono);
}

.skip-link {
  position: fixed;
  top: -80px;
  left: 16px;
  z-index: 2000;
  padding: 12px 20px;
  background: var(--c-accent);
  color: var(--c-bg);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  transition: top var(--ease);
}

.skip-link:hover {
  text-decoration: none;
}

.skip-link:focus {
  top: 12px;
  color: var(--c-bg);
  text-decoration: none;
}

.scroll-progress {
  height: 3px;
  background: var(--c-grid);
  overflow: hidden;
}

.scroll-progress__bar {
  width: 0;
  height: 100%;
  background: var(--c-accent);
  transition: width 0.15s linear;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 900;
  background: var(--c-bg);
}

.site-header::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--c-accent) 0, var(--c-accent) 160px, var(--c-grid) 160px, var(--c-grid) 100%);
  pointer-events: none;
}

.header-command {
  position: relative;
  max-width: var(--container);
  height: var(--header-h);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  color: var(--c-text);
  text-decoration: none;
}

.brand:hover {
  text-decoration: none;
}

.brand__mark {
  position: relative;
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--c-accent) 0%, var(--c-accent) 55%, var(--c-accent-2) 55%, var(--c-accent-2) 100%);
  color: var(--c-bg);
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.03em;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
}

.brand__name {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.1;
}

.brand__appendix {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--c-text-dim);
  padding: 2px 6px;
  border: 1px solid var(--c-grid);
  letter-spacing: 0.1em;
  white-space: nowrap;
}

.site-nav {
  margin-left: auto;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.site-nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 12px;
  font-size: 14px;
  color: var(--c-text-dim);
  border: 1px solid transparent;
  transition: color var(--ease), background-color var(--ease), border-color var(--ease);
}

.site-nav__link:hover {
  color: var(--c-text);
  background: var(--c-index);
  border-color: var(--c-grid);
  text-decoration: none;
}

.site-nav__link[aria-current="page"] {
  color: var(--c-accent);
  background: var(--c-index);
  border-color: var(--c-grid);
}

.site-nav__link::before,
.site-nav__link::after {
  content: '';
  position: absolute;
  width: 5px;
  height: 5px;
  opacity: 0;
  transition: opacity var(--ease);
}

.site-nav__link::before {
  top: 0;
  left: 0;
  border-top: 2px solid var(--c-accent);
  border-left: 2px solid var(--c-accent);
}

.site-nav__link::after {
  bottom: 0;
  right: 0;
  border-bottom: 2px solid var(--c-accent-2);
  border-right: 2px solid var(--c-accent-2);
}

.site-nav__link:hover::before,
.site-nav__link:hover::after,
.site-nav__link[aria-current="page"]::before,
.site-nav__link[aria-current="page"]::after {
  opacity: 1;
}

.site-nav__index {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--c-accent-2);
  line-height: 1;
}

.site-nav__label {
  line-height: 1.4;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.data-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background: var(--c-panel);
  border: 1px solid var(--c-grid);
  white-space: nowrap;
}

.data-status__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-accent);
  box-shadow: 0 0 8px rgba(0, 229, 160, 0.6);
  animation: h4ka-pulse 2s ease-in-out infinite;
}

@keyframes h4ka-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

.data-status__text {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-text-dim);
  letter-spacing: 0.04em;
}

.data-status__text::after {
  content: '▍';
  margin-left: 4px;
  color: var(--c-accent);
  animation: h4ka-blink 1s step-end infinite;
}

@keyframes h4ka-blink {
  50% { opacity: 0; }
}

.header-cta {
  flex-shrink: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border: 1px solid var(--c-grid);
  background: var(--c-panel);
  color: var(--c-text);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.4;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--ease), border-color var(--ease), color var(--ease);
}

.btn:hover {
  text-decoration: none;
  background: var(--c-index);
  border-color: var(--c-accent);
  color: var(--c-text);
}

.btn--primary {
  background: var(--c-accent);
  border-color: var(--c-accent);
  color: var(--c-bg);
  font-weight: 700;
}

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

.btn--ghost {
  background: transparent;
  border-color: var(--c-grid);
  color: var(--c-text-dim);
}

.btn--ghost:hover {
  color: var(--c-text);
  border-color: var(--c-accent);
  background: transparent;
}

.btn--compact {
  padding: 8px 14px;
  font-size: 12px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  background: var(--c-panel);
  border: 1px solid var(--c-grid);
  cursor: pointer;
}

.nav-toggle__bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--c-text);
  transition: transform var(--ease), background-color var(--ease);
}

.nav-toggle:hover .nav-toggle__bar {
  background: var(--c-accent);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
  transform: translateY(-7px) rotate(-45deg);
  background: var(--c-accent);
}

.site-footer {
  margin-top: 80px;
  background: var(--c-panel);
  border-top: 3px solid var(--c-accent);
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -3px;
  left: 0;
  width: 42%;
  height: 3px;
  background: var(--c-accent-2);
  z-index: 1;
}

.footer-shell {
  max-width: var(--container);
  margin: 0 auto;
  padding: 56px 24px 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 0.9fr 1.3fr;
  gap: 48px;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--c-text);
  text-decoration: none;
  margin-bottom: 16px;
}

.footer-brand:hover {
  text-decoration: none;
}

.footer-brand__mark {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--c-accent) 0%, var(--c-accent) 55%, var(--c-accent-2) 55%, var(--c-accent-2) 100%);
  color: var(--c-bg);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 13px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
}

.footer-brand__name {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.footer-brand__appendix {
  font-family: var(--font-mono);
  font-size: 10px;
  padding: 2px 5px;
  border: 1px solid var(--c-grid);
  color: var(--c-text-dim);
  letter-spacing: 0.1em;
}

.footer-intro__desc {
  font-size: 14px;
  color: var(--c-text-dim);
  line-height: 1.7;
  margin-bottom: 16px;
}

.footer-intro__status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-text-dim);
}

.footer-intro__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-accent);
  box-shadow: 0 0 6px rgba(0, 229, 160, 0.5);
}

.footer-stats {
  display: flex;
  gap: 24px;
  margin-top: 20px;
}

.footer-stats__item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.footer-stats__num {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--c-accent);
  line-height: 1.2;
}

.footer-stats__label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--c-text-dim);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.footer-col__title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-text);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--c-grid);
  margin-bottom: 18px;
}

.footer-col__index {
  color: var(--c-accent-2);
  font-size: 11px;
}

.footer-col__list li {
  margin-bottom: 10px;
  font-size: 14px;
}

.footer-col__list a {
  color: var(--c-text-dim);
}

.footer-col__list a:hover {
  color: var(--c-accent);
  text-decoration: none;
}

.footer-col--contact .footer-col__list {
  color: var(--c-text-dim);
  font-size: 13px;
  line-height: 1.7;
}

.footer-legal {
  border-top: 1px solid var(--c-grid);
  background: var(--c-bg);
}

.footer-legal__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-text-dim);
}

.footer-legal__inner::before {
  content: '//';
  font-family: var(--font-mono);
  color: var(--c-accent-2);
  font-weight: 700;
}

.footer-legal__inner a {
  color: var(--c-text-dim);
}

.footer-legal__inner a:hover {
  color: var(--c-accent);
  text-decoration: none;
}

.footer-legal__sep {
  color: var(--c-grid);
}

.section {
  padding: 48px 0;
}

.section-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 28px;
}

.section-head__index {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-accent-2);
  font-weight: 600;
}

.section-head__title {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 0.03em;
  white-space: nowrap;
}

.section-head__line {
  flex: 1;
  height: 1px;
  background: var(--c-grid);
}

.grid {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(12, 1fr);
}

.grid__item--4 { grid-column: span 4; }
.grid__item--6 { grid-column: span 6; }
.grid__item--8 { grid-column: span 8; }
.grid__item--12 { grid-column: span 12; }

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 20px 0;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-text-dim);
}

.breadcrumb a {
  color: var(--c-text-dim);
}

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

.breadcrumb__sep {
  color: var(--c-grid);
}

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

.page-header {
  padding: 48px 0 24px;
  margin-bottom: 40px;
  border-bottom: 1px solid var(--c-grid);
  position: relative;
}

.page-header__title {
  font-family: var(--font-heading);
  font-size: clamp(28px, 4vw, 44px);
  letter-spacing: 0.04em;
  line-height: 1.15;
  text-transform: uppercase;
}

.page-header__title small {
  display: block;
  font-size: 14px;
  font-family: var(--font-mono);
  color: var(--c-accent-2);
  letter-spacing: 0.08em;
  margin-bottom: 6px;
  font-weight: 400;
}

.page-header__meta {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-text-dim);
  margin-top: 12px;
}

.card {
  background: var(--c-panel);
  border: 1px solid var(--c-grid);
  padding: 24px;
}

.card--accent {
  border-top: 3px solid var(--c-accent);
}

.card--warning {
  border-top: 3px solid var(--c-accent-2);
}

.card--danger {
  border-top: 3px solid var(--c-danger);
}

.card__title {
  font-family: var(--font-heading);
  font-size: 18px;
  margin-bottom: 12px;
}

.card__meta {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-text-dim);
  margin-bottom: 16px;
}

.data-panel {
  position: relative;
  background: var(--c-panel);
  border: 1px solid var(--c-grid);
  padding: 28px;
}

.data-panel::before,
.data-panel::after {
  content: '';
  position: absolute;
  width: 14px;
  height: 14px;
  pointer-events: none;
}

.data-panel::before {
  top: -1px;
  left: -1px;
  border-top: 2px solid var(--c-accent);
  border-left: 2px solid var(--c-accent);
}

.data-panel::after {
  bottom: -1px;
  right: -1px;
  border-bottom: 2px solid var(--c-accent-2);
  border-right: 2px solid var(--c-accent-2);
}

.data-panel__title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--c-grid);
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--c-text-dim);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  background: var(--c-index);
  border: 1px solid var(--c-grid);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-text-dim);
  letter-spacing: 0.05em;
}

.tag--accent {
  color: var(--c-accent);
  border-color: rgba(0, 229, 160, 0.4);
}

.tag--orange {
  color: var(--c-accent-2);
  border-color: rgba(255, 122, 26, 0.4);
}

.tag--danger {
  color: var(--c-danger);
  border-color: rgba(255, 59, 92, 0.4);
}

.media {
  position: relative;
  overflow: hidden;
  background: var(--c-panel);
  border: 1px solid var(--c-grid);
  aspect-ratio: 16 / 9;
}

.media--wide { aspect-ratio: 21 / 9; }
.media--portrait { aspect-ratio: 3 / 4; }
.media--square { aspect-ratio: 1 / 1; }

.media__placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--c-text-dim);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  background: repeating-linear-gradient(
    -45deg,
    transparent 0,
    transparent 10px,
    rgba(42, 59, 102, 0.3) 10px,
    rgba(42, 59, 102, 0.3) 12px
  );
}

.media__placeholder::before {
  content: '';
  width: 28px;
  height: 28px;
  border: 1px solid var(--c-grid);
  border-left-color: var(--c-accent);
  border-top-color: var(--c-accent);
  transform: rotate(45deg);
}

@media (max-width: 1100px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
}

@media (max-width: 1023px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin-left: 0;
    background: var(--c-overlay);
    border-bottom: 1px solid var(--c-grid);
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.3);
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
  }

  .site-nav[data-open] {
    display: block;
    animation: nav-drop 0.2s ease;
  }

  @keyframes nav-drop {
    from { opacity: 0; transform: translateY(-6px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    padding: 8px 16px 16px;
    gap: 0;
  }

  .site-nav__link {
    display: flex;
    align-items: center;
    padding: 14px 12px;
    border-bottom: 1px solid var(--c-grid);
    border-left: 2px solid transparent;
    font-size: 15px;
    color: var(--c-text);
  }

  .site-nav__link:hover {
    background: var(--c-index);
    border-left-color: var(--c-accent);
  }

  .site-nav__link[aria-current="page"] {
    border-left-color: var(--c-accent);
    background: var(--c-index);
    color: var(--c-accent);
  }

  .site-nav__index {
    min-width: 26px;
  }

  .header-command {
    padding: 0 16px;
    gap: 16px;
  }
}

@media (max-width: 767px) {
  .header-command {
    gap: 10px;
  }

  .brand__name {
    font-size: 17px;
  }

  .brand__appendix {
    display: none;
  }

  .brand__mark {
    width: 32px;
    height: 32px;
    font-size: 13px;
  }

  .data-status {
    padding: 4px 8px;
  }

  .data-status__text {
    font-size: 11px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-shell {
    padding: 40px 20px 32px;
  }

  .footer-legal__inner {
    padding: 16px 20px;
    flex-direction: column;
    gap: 6px;
    text-align: center;
  }

  .footer-legal__sep {
    display: none;
  }

  .grid {
    gap: 16px;
  }

  .grid__item--4,
  .grid__item--6,
  .grid__item--8 {
    grid-column: span 12;
  }

  .page-header {
    padding: 32px 0 20px;
    margin-bottom: 28px;
  }

  .section {
    padding: 32px 0;
  }
}

@media (max-width: 560px) {
  .header-cta {
    display: none;
  }
}

@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;
  }

  .scroll-progress__bar {
    transition: none;
  }
}