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

:root {
  --color-bg: #0B1A2C;
  --color-bg-alt: #11263C;
  --color-bg-deep: #081420;
  --color-accent: #00FFAA;
  --color-alert: #FF6A00;
  --color-text: #E6F0F5;
  --color-text-dim: #A8C3D4;
  --color-chart-1: #4D9FFF;
  --color-chart-2: #9B5DE5;
  --color-border: #1E3A5F;
  --color-shadow: #000000;
  --font-head: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  --font-data: 'Roboto Mono', 'SFMono-Regular', Consolas, monospace;
  --header-height: 72px;
  --rail-width: 200px;
  --content-max: 1200px;
  --radius: 8px;
  --radius-lg: 16px;
  --shadow-hard: 4px 4px 0 var(--color-shadow);
  --ease: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out: 500ms cubic-bezier(0.2, 0.65, 0.3, 1);
}

html {
  scroll-behavior: smooth;
  scrollbar-color: var(--color-border) var(--color-bg);
  scrollbar-width: thin;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--color-bg);
  background-image:
    radial-gradient(60% 40% at 85% -5%, rgba(77, 159, 255, 0.12), transparent 70%),
    radial-gradient(45% 35% at 15% 15%, rgba(155, 93, 229, 0.08), transparent 70%),
    linear-gradient(180deg, var(--color-bg) 0%, #0D1F34 50%, var(--color-bg) 100%);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

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

ul, ol {
  list-style: none;
}

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

a:hover {
  color: #66FFC9;
}

button {
  font: inherit;
  color: inherit;
  border: none;
  background: none;
  cursor: pointer;
}

::selection {
  background: rgba(0, 255, 170, 0.3);
  color: var(--color-text);
}

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

:target {
  scroll-margin-top: calc(var(--header-height) + 24px);
}

/* ========== Skip Link ========== */
.skip-link {
  position: fixed;
  top: -100px;
  left: 24px;
  z-index: 3000;
  padding: 12px 24px;
  background: var(--color-accent);
  color: var(--color-bg);
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 14px;
  border: 2px solid var(--color-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
  transition: top var(--ease);
}

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

/* ========== Header ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: 1200;
  background: rgba(11, 26, 44, 0.92);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-bottom: 2px solid var(--color-border);
}

.site-header__bar {
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 20px;
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.site-header__ticker {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 8px 16px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-dim);
}

.site-header__ticker-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 10px rgba(0, 255, 170, 0.7);
  animation: pulse-dot 2s ease-in-out infinite;
}

.site-header__progress {
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 3px;
  overflow: hidden;
  pointer-events: none;
}

.site-header__progress-bar {
  display: block;
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--color-accent), var(--color-chart-1));
  transform: scaleX(0);
  transform-origin: left top;
}

/* ========== Brand ========== */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  color: var(--color-text);
}

.brand:hover {
  color: var(--color-text);
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  background: var(--color-accent);
  color: var(--color-bg);
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 18px;
  letter-spacing: 0.02em;
  line-height: 1;
  border: 2px solid var(--color-bg);
  border-radius: var(--radius);
  box-shadow: 3px 3px 0 rgba(0, 0, 0, 0.6);
}

.brand__group {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}

.brand__text {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 16px;
  letter-spacing: 0.04em;
  color: var(--color-text);
  white-space: nowrap;
}

.brand__badge {
  color: var(--color-accent);
}

.brand__subtext {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-dim);
}

/* ========== Nav Toggle ========== */
.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: transparent;
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 14px;
  transition: border-color var(--ease), background var(--ease);
}

.nav-toggle:hover {
  border-color: var(--color-accent);
  background: rgba(0, 255, 170, 0.06);
}

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
}

.nav-toggle__bars span {
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: transform var(--ease), opacity var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* ========== Side Rail Nav ========== */
.site-nav {
  position: fixed;
  top: var(--header-height);
  bottom: 0;
  left: 0;
  z-index: 1100;
  width: min(320px, 84vw);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background:
    linear-gradient(rgba(30, 58, 95, 0.22) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 58, 95, 0.22) 1px, transparent 1px),
    linear-gradient(180deg, #132A44 0%, #0E1F33 100%);
  background-size: 24px 24px, 24px 24px, 100% 100%;
  border-right: 2px solid var(--color-border);
  padding: 24px 0;
  transform: translateX(-105%);
  visibility: hidden;
  box-shadow: 12px 0 32px rgba(0, 0, 0, 0.5);
  transition: transform var(--ease), visibility var(--ease);
}

.site-nav[data-open] {
  transform: translateX(0);
  visibility: visible;
}

.site-nav__list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 0 12px;
  margin-top: 24px;
}

.site-nav__link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-left: 3px solid transparent;
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--color-text-dim);
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.02em;
  transition: color var(--ease), background var(--ease), border-color var(--ease);
}

.site-nav__link:hover {
  color: var(--color-text);
  background: rgba(0, 255, 170, 0.08);
}

.site-nav__link[aria-current="page"] {
  color: var(--color-accent);
  background: rgba(0, 255, 170, 0.1);
  border-left-color: var(--color-accent);
  font-weight: 800;
}

.site-nav__index {
  font-family: var(--font-data);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--color-chart-2);
  line-height: 1;
  min-width: 20px;
}

.site-nav__link[aria-current="page"] .site-nav__index {
  color: var(--color-accent);
}

.site-nav__label {
  display: inline-block;
  line-height: 1.2;
}

.site-nav__status {
  margin-top: auto;
  padding: 20px 12px 0;
  border-top: 1px solid var(--color-border);
}

.site-nav__cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--color-accent);
  color: var(--color-bg);
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 14px;
  letter-spacing: 0.04em;
  border: 2px solid var(--color-bg);
  border-radius: var(--radius);
  box-shadow: 3px 3px 0 rgba(0, 0, 0, 0.45);
  transition: transform var(--ease), box-shadow var(--ease), background var(--ease);
}

.site-nav__cta:hover {
  background: #66FFC9;
  color: var(--color-bg);
  transform: translate(-1px, -1px);
  box-shadow: 5px 5px 0 rgba(0, 0, 0, 0.5);
}

.site-nav__cta-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-bg);
  flex-shrink: 0;
  animation: pulse-dot 2s ease-in-out infinite;
}

/* Mobile overlay */
@media (max-width: 1023px) {
  body[data-nav-open] {
    overflow: hidden;
  }

  body[data-nav-open]::after {
    content: '';
    position: fixed;
    inset: var(--header-height) 0 0 0;
    background: rgba(4, 10, 18, 0.65);
    z-index: 1050;
  }
}

/* ========== Main Content ========== */
#main-content {
  flex: 1;
  width: 100%;
  padding-top: calc(var(--header-height) + 32px);
  padding-bottom: 56px;
  padding-left: 20px;
  padding-right: 20px;
}

/* ========== Footer ========== */
.site-footer {
  position: relative;
  flex-shrink: 0;
  background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
  border-top: 3px solid var(--color-border);
  padding: 48px 24px 36px;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -3px;
  left: 0;
  width: 120px;
  height: 3px;
  background: var(--color-accent);
}

.site-footer__grid {
  max-width: var(--content-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  color: var(--color-text-dim);
  font-size: 14px;
}

.site-footer__logo {
  display: block;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.25rem;
  letter-spacing: 0.06em;
  color: var(--color-text);
  margin-bottom: 12px;
}

.site-footer__logo::after {
  content: ' ●';
  color: var(--color-accent);
  font-size: 10px;
  vertical-align: top;
}

.site-footer__text {
  line-height: 1.8;
  margin-bottom: 12px;
  max-width: 34em;
}

.site-footer__statement {
  font-size: 13px;
  line-height: 1.8;
  opacity: 0.85;
  max-width: 44em;
}

.site-footer__col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.site-footer__heading {
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-text);
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(30, 58, 95, 0.8);
  margin-bottom: 6px;
}

.site-footer__link {
  color: var(--color-text-dim);
  transition: color var(--ease), padding-left var(--ease);
}

.site-footer__link:hover {
  color: var(--color-accent);
  padding-left: 4px;
}

.site-footer__contact-line {
  font-family: var(--font-data);
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-text-dim);
  word-break: break-all;
}

.site-footer__address {
  font-size: 13px;
  line-height: 1.7;
  font-style: normal;
  color: var(--color-text-dim);
}

.site-footer__meta {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.04em;
  line-height: 1.7;
}

.site-footer__icp {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.site-footer__icp::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  border-radius: 2px;
  transform: rotate(45deg);
  flex-shrink: 0;
}

.site-footer__copyright {
  color: var(--color-text-dim);
}

/* ========== Layout ========== */
.container {
  width: 100%;
  max-width: calc(var(--content-max) + 64px);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.section {
  padding-top: 64px;
  padding-bottom: 64px;
}

.section--wide {
  padding-left: 0;
  padding-right: 0;
}

.section--narrow {
  max-width: 840px;
  margin-left: auto;
  margin-right: auto;
}

.section__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  line-height: 1.25;
  letter-spacing: 0.01em;
  color: var(--color-text);
  margin-bottom: 14px;
}

.section__title[data-index]::before {
  content: attr(data-index);
  display: block;
  font-family: var(--font-data);
  font-weight: 400;
  font-size: 0.55em;
  letter-spacing: 0.24em;
  color: var(--color-accent);
  margin-bottom: 8px;
}

.section__lead {
  color: var(--color-text-dim);
  font-size: 1.05rem;
  max-width: 56ch;
  margin-bottom: 32px;
}

/* ========== Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.04em;
  border: 2px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  text-decoration: none;
  transition: transform var(--ease), box-shadow var(--ease), background var(--ease), color var(--ease), border-color var(--ease);
}

.btn--primary {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-bg);
  box-shadow: var(--shadow-hard);
}

.btn--primary:hover {
  background: #66FFC9;
  border-color: #66FFC9;
  color: var(--color-bg);
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--color-shadow);
}

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

.btn--ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: rgba(0, 255, 170, 0.05);
}

/* ========== Cards ========== */
.card {
  background: var(--color-bg-alt);
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
  padding: 28px;
  transition: transform var(--ease), border-color var(--ease), box-shadow var(--ease);
}

.card:hover {
  transform: translate(-2px, -2px);
  border-color: rgba(0, 255, 170, 0.35);
  box-shadow: 6px 6px 0 var(--color-shadow);
}

.card__title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.125rem;
  line-height: 1.4;
  color: var(--color-text);
  margin-bottom: 10px;
}

.card__body {
  color: var(--color-text-dim);
  font-size: 0.9375rem;
  line-height: 1.7;
}

/* ========== Panels ========== */
.panel {
  background: rgba(17, 38, 60, 0.8);
  border: 2px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
  padding: 20px 24px;
}

.panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.panel__title {
  font-family: var(--font-data);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.panel__body {
  color: var(--color-text-dim);
  font-size: 0.9375rem;
  line-height: 1.7;
}

/* ========== Breadcrumb ========== */
.breadcrumb {
  padding: 16px 0;
  font-family: var(--font-data);
  font-size: 13px;
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb__link {
  color: var(--color-text-dim);
  transition: color var(--ease);
}

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

.breadcrumb__link[aria-current="page"] {
  color: var(--color-text);
  font-weight: 700;
}

.breadcrumb__sep {
  color: var(--color-chart-2);
}

/* ========== Tags ========== */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-dim);
  background: rgba(17, 38, 60, 0.5);
}

.tag--accent {
  color: var(--color-accent);
  border-color: rgba(0, 255, 170, 0.4);
  background: rgba(0, 255, 170, 0.06);
}

.tag--alert {
  color: var(--color-alert);
  border-color: rgba(255, 106, 0, 0.4);
  background: rgba(255, 106, 0, 0.06);
}

/* ========== Data Rows ========== */
.data-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px dashed rgba(30, 58, 95, 0.6);
  font-family: var(--font-data);
  font-size: 14px;
}

.data-row:last-child {
  border-bottom: 0;
}

.data-row__label {
  color: var(--color-text-dim);
}

.data-row__value {
  color: var(--color-accent);
  font-weight: 700;
  text-align: right;
}

/* ========== Image Frame ========== */
.image-frame {
  position: relative;
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg-alt);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
  aspect-ratio: 16 / 9;
  min-height: 160px;
}

.image-frame::before {
  content: 'IMG';
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--color-text-dim);
  background: repeating-linear-gradient(
    45deg,
    rgba(30, 58, 95, 0.3),
    rgba(30, 58, 95, 0.3) 8px,
    transparent 8px,
    transparent 16px
  );
}

.image-frame img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ========== Scroll Reveal ========== */
html.js [data-reveal]:not(.is-visible) {
  opacity: 0;
  transform: translateY(24px);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: none;
  transition: opacity 600ms cubic-bezier(0.2, 0.65, 0.3, 1),
              transform 600ms cubic-bezier(0.2, 0.65, 0.3, 1);
}

/* ========== Keyframes ========== */
@keyframes pulse-dot {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.5;
    transform: scale(0.85);
  }
}

/* ========== Responsive ========== */
@media (max-width: 420px) {
  .brand__text {
    font-size: 14px;
    letter-spacing: 0.02em;
  }

  .brand__mark {
    width: 38px;
    height: 38px;
    font-size: 15px;
  }

  .brand__subtext {
    font-size: 10px;
  }

  .site-header__bar {
    padding: 0 14px;
  }

  #main-content {
    padding-left: 14px;
    padding-right: 14px;
  }
}

@media (min-width: 640px) {
  .site-footer__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
  }
}

@media (min-width: 1024px) {
  body {
    padding-left: var(--rail-width);
  }

  .site-header__bar {
    padding: 0 32px;
  }

  .site-header__ticker {
    display: inline-flex;
  }

  .nav-toggle {
    display: none;
  }

  .site-nav {
    top: var(--header-height);
    bottom: 0;
    width: var(--rail-width);
    transform: translateX(0);
    visibility: visible;
    box-shadow: none;
  }

  .site-nav[data-open] {
    transform: translateX(0);
  }

  .site-nav__list {
    margin-top: 0;
  }

  #main-content {
    padding-top: calc(var(--header-height) + 40px);
    padding-left: 40px;
    padding-right: 40px;
  }

  .site-footer__grid {
    grid-template-columns: 2fr 1.2fr 1fr 1.5fr;
    gap: 48px;
  }
}

/* ========== Reduced Motion ========== */
@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;
  }

  html.js [data-reveal]:not(.is-visible) {
    opacity: 1;
    transform: none;
  }

  [data-reveal].is-visible {
    transition: none;
  }

  .site-header__ticker-dot,
  .site-nav__cta-dot {
    animation: none;
  }
}