:root {
  --bg-deep: #0B1B2D;
  --bg-deep-2: #081420;
  --teal: #1E4D4A;
  --dark-teal: #0F3A40;
  --neon-green: #00FF9C;
  --electric-orange: #FF6C00;
  --terra: #D96C4A;
  --text-light: #F5F7FA;
  --text-dim: #8496A8;
  --cream: #FDF6E3;
  --line: rgba(0, 255, 156, 0.28);
  --line-soft: rgba(245, 247, 250, 0.12);
  --font-sans: "PingFang SC", "Source Han Sans SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-display: "PingFang SC", "Source Han Sans SC", "Microsoft YaHei", "Heiti SC", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --cut: 14px;
  --max-width: 1380px;
  --transition: 180ms cubic-bezier(0.2, 0, 0, 1);
  --clip: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
}

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

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

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 90% 10%, rgba(15, 58, 64, 0.55) 0%, transparent 30rem),
    linear-gradient(180deg, var(--bg-deep), var(--bg-deep-2));
  color: var(--text-light);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.8;
  overflow-x: hidden;
}

body, h1, h2, h3, h4, p, ul, ol, dl, dd, figure, blockquote, hr {
  margin: 0;
  padding: 0;
}

ul[class], ol[class] { list-style: none; }

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

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

[hidden] { display: none !important; }

h1, h2, h3, h4 { font-family: var(--font-display); }

a { color: inherit; }

:focus-visible {
  outline: 3px solid var(--electric-orange);
  outline-offset: 4px;
}

::selection {
  background: var(--neon-green);
  color: var(--bg-deep);
}

#main-content {
  min-height: 72vh;
  scroll-margin-top: 8rem;
}

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

.skip-link {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 2000;
  background: var(--neon-green);
  color: var(--bg-deep);
  font-weight: 700;
  padding: 0.75rem 1.25rem;
  border: 0;
  clip-path: var(--clip);
  transform: translateY(-300%);
  transition: transform var(--transition);
}

.skip-link:focus {
  transform: translateY(0);
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 3px;
  z-index: 3000;
  background: linear-gradient(90deg, var(--neon-green), var(--electric-orange));
  pointer-events: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(11, 27, 45, 0.92);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 0 0 rgba(0, 0, 0, 0);
  transition: box-shadow var(--transition);
}

.site-header.is-scrolled {
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

.masthead {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 1rem;
  width: min(var(--max-width), 100% - 2rem);
  margin-inline: auto;
  padding: 0.75rem 0;
  transition: padding var(--transition);
}

.site-header.is-scrolled .masthead {
  padding-top: 0.35rem;
  padding-bottom: 0.35rem;
}

.masthead__meta {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 0.75rem;
  min-width: 0;
}

.clock {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--neon-green);
  letter-spacing: 0.06em;
  white-space: nowrap;
  min-width: 13ch;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(11, 27, 45, 0.75);
  border: 1px solid var(--line-soft);
  padding: 0.25rem 0.75rem;
  clip-path: var(--clip);
}

.status-pill.is-live {
  border-color: rgba(0, 255, 156, 0.55);
}

.status-dot {
  width: 0.625rem;
  height: 0.625rem;
  flex: none;
  border-radius: 50%;
  background: var(--neon-green);
  box-shadow: 0 0 0 0 rgba(0, 255, 156, 0.45);
  animation: status-pulse 2s ease-out infinite;
}

@keyframes status-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(0, 255, 156, 0.45); }
  50% { box-shadow: 0 0 0 6px rgba(0, 255, 156, 0); }
}

.status-text {
  font-size: 0.7rem;
  color: var(--text-dim);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.masthead__brand {
  justify-self: center;
  min-width: 0;
}

.brand {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  text-decoration: none;
  color: var(--text-light);
  line-height: 1.2;
}

.brand__mark {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.4rem, 3vw, 1.8rem);
  letter-spacing: 0.02em;
  transform: skew(-5deg);
}

.brand__super {
  font-family: var(--font-mono);
  color: var(--neon-green);
  font-size: 0.66em;
  margin-left: 0.15em;
}

.brand__sub {
  display: block;
  font-size: 0.65rem;
  letter-spacing: 0.32em;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-top: 0.05rem;
}

.brand:hover .brand__super {
  color: var(--electric-orange);
}

.masthead__actions {
  display: flex;
  justify-content: flex-end;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.4rem;
  background: rgba(11, 27, 45, 0.6);
  border: 1px solid var(--line-soft);
  color: var(--text-dim);
  padding: 0.4rem 0.65rem;
  clip-path: var(--clip);
  cursor: pointer;
}

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

.nav-toggle__bar {
  display: block;
  width: 1.1rem;
  height: 2px;
  background: currentColor;
  box-shadow: 0 -5px 0 currentColor, 0 5px 0 currentColor;
}

.nav-toggle__label {
  font-size: 0.75rem;
  letter-spacing: 0.08em;
}

[data-nav-toggle][aria-expanded="true"] .nav-toggle__bar {
  background: transparent;
  box-shadow: 0 -5px 0 currentColor, 0 5px 0 currentColor;
}

.site-nav {
  background: rgba(11, 27, 45, 0.75);
  border-top: 1px solid rgba(245, 247, 250, 0.06);
}

.site-nav__list {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.25rem;
  width: min(var(--max-width), 100% - 2rem);
  margin-inline: auto;
  padding: 0.25rem 0;
}

.site-nav__item {
  list-style: none;
}

.site-nav__link {
  position: relative;
  display: block;
  padding: 0.65rem 1.15rem;
  color: var(--text-dim);
  text-decoration: none;
  font-weight: 600;
  letter-spacing: 0.08em;
  border-bottom: 2px solid transparent;
  transition: color var(--transition), background var(--transition), border-color var(--transition);
}

.site-nav__link:hover,
.site-nav__link[aria-current="page"] {
  color: var(--neon-green);
}

.site-nav__link:hover {
  background: rgba(0, 255, 156, 0.05);
}

.site-nav__link[aria-current="page"] {
  border-bottom-color: var(--neon-green);
}

.site-header.is-scrolled .site-nav__link {
  padding-top: 0.4rem;
  padding-bottom: 0.4rem;
}

.site-footer {
  background: linear-gradient(180deg, var(--bg-deep) 0%, var(--dark-teal) 120%);
  border-top: 1px solid var(--line);
}

.site-footer__inner {
  display: grid;
  grid-template-columns: 1.4fr 0.7fr 1fr;
  gap: 3rem;
  width: min(var(--max-width), 100% - 2rem);
  margin-inline: auto;
  padding: 4.5rem 0 3rem;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.25rem;
}

.brand--footer .brand__mark {
  font-size: 1.45rem;
}

.footer-statement {
  max-width: 36rem;
  color: var(--text-dim);
  font-size: 0.95rem;
  border-left: 3px solid var(--neon-green);
  padding-left: 1.25rem;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.footer-link {
  color: var(--text-dim);
  text-decoration: none;
  font-weight: 600;
  width: fit-content;
  transition: color var(--transition);
}

.footer-link::before {
  content: "// ";
  color: var(--electric-orange);
  font-family: var(--font-mono);
  margin-right: 0.1rem;
}

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

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  font-size: 0.9rem;
  color: var(--text-dim);
}

.footer-contact__item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.footer-contact__item::before {
  content: "◆";
  color: var(--electric-orange);
  font-size: 0.5rem;
}

.site-footer__bottom {
  border-top: 1px solid var(--line-soft);
  background: rgba(11, 27, 45, 0.55);
}

.site-footer__bottom-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: min(var(--max-width), 100% - 2rem);
  margin-inline: auto;
  padding: 1rem 0;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.footer-bottom__status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.status-dot--small {
  width: 0.45rem;
  height: 0.45rem;
}

.back-top {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: transparent;
  border: 1px solid var(--line-soft);
  color: var(--text-dim);
  padding: 0.4rem 0.7rem;
  clip-path: var(--clip);
  font-size: 0.8rem;
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition);
}

.back-top:hover {
  color: var(--electric-orange);
  border-color: var(--electric-orange);
}

.container {
  width: min(100% - 2rem, var(--max-width));
  margin-inline: auto;
}

.container--narrow {
  width: min(100% - 2rem, 52rem);
}

.container--wide {
  width: min(100% - 2rem, 1680px);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.5rem;
  background: transparent;
  color: var(--text-light);
  border: 1px solid var(--line);
  border-radius: 0;
  cursor: pointer;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-decoration: none;
  clip-path: var(--clip);
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
}

.btn:hover {
  border-color: var(--neon-green);
  color: var(--neon-green);
}

.btn--primary {
  background: var(--electric-orange);
  border-color: var(--electric-orange);
  color: var(--bg-deep);
}

.btn--primary:hover {
  background: var(--neon-green);
  border-color: var(--neon-green);
  color: var(--bg-deep);
}

.btn--ghost {
  background: rgba(0, 255, 156, 0.08);
  color: var(--neon-green);
  border-color: rgba(0, 255, 156, 0.4);
}

.btn--ghost:hover {
  background: rgba(0, 255, 156, 0.14);
}

.breadcrumbs {
  font-size: 0.875rem;
  color: var(--text-dim);
}

.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
}

.breadcrumbs__item {
  display: inline-flex;
  align-items: center;
}

.breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  margin-right: 0.5rem;
  color: var(--electric-orange);
  font-family: var(--font-mono);
}

.breadcrumbs__link {
  color: var(--text-dim);
  text-decoration: none;
}

.breadcrumbs__link:hover,
.breadcrumbs__link[aria-current="page"] {
  color: var(--neon-green);
}

.card {
  position: relative;
  background: rgba(245, 247, 250, 0.045);
  border: 1px solid var(--line-soft);
  padding: 1.5rem;
  clip-path: var(--clip);
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
}

.card:hover {
  border-color: var(--electric-orange);
  background: rgba(245, 247, 250, 0.06);
  transform: translateY(-2px);
}

.card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.75rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--line-soft);
}

.card__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.1rem;
  line-height: 1.3;
}

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

.card__footer {
  margin-top: 1.25rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--line-soft);
  font-size: 0.875rem;
  color: var(--text-dim);
}

.card--data {
  border-color: rgba(0, 255, 156, 0.32);
  background: linear-gradient(135deg, rgba(15, 58, 64, 0.55), rgba(11, 27, 45, 0.95));
}

.card--data .card__title {
  color: var(--neon-green);
}

.data-card__value {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(2rem, 6vw, 4.25rem);
  line-height: 1;
  color: var(--neon-green);
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
}

.data-card__label {
  display: block;
  margin-top: 0.35rem;
  color: var(--text-dim);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: 2rem;
  align-items: start;
}

.split__aside {
  min-width: 0;
  padding-right: 1rem;
  border-right: 1px solid var(--line-soft);
}

.split__main {
  min-width: 0;
}

.grid {
  display: grid;
  gap: 1.5rem;
}

.grid--two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid--three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.page-header {
  width: min(100% - 2rem, var(--max-width));
  margin-inline: auto;
  padding: 4.5rem 0 2rem;
}

.page-header--narrow {
  max-width: 56rem;
}

.page-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.25rem, 6vw, 4.25rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  transform: skew(-5deg);
  transform-origin: left center;
}

.page-intro {
  max-width: 62ch;
  margin-top: 1.25rem;
  color: var(--text-dim);
  font-size: 1.125rem;
}

.section-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  color: var(--electric-orange);
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.section-label::before {
  content: "// ";
}

.section-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.75rem, 4vw, 3rem);
  line-height: 1.1;
  transform: skew(-5deg);
  transform-origin: left center;
}

.section-intro {
  max-width: 62ch;
  margin-top: 0.75rem;
  color: var(--text-dim);
}

.callout {
  border-left: 3px solid var(--neon-green);
  background: rgba(30, 77, 74, 0.16);
  padding: 1rem 1.25rem;
  color: var(--text-light);
  clip-path: var(--clip);
}

.callout--warning {
  border-left-color: var(--electric-orange);
  background: rgba(255, 108, 0, 0.08);
}

.callout--error {
  border-left-color: var(--terra);
  background: rgba(217, 108, 74, 0.08);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.925rem;
  color: var(--text-light);
}

.data-table caption {
  color: var(--text-dim);
  text-align: left;
  padding-bottom: 0.75rem;
}

.data-table th,
.data-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--line-soft);
  text-align: left;
  vertical-align: top;
  font-variant-numeric: tabular-nums;
}

.data-table th {
  font-weight: 700;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--neon-green);
  background: rgba(0, 255, 156, 0.05);
}

.data-table tbody tr:hover {
  background: rgba(255, 108, 0, 0.06);
}

.mono-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.accordion {
  border-top: 1px solid var(--line-soft);
}

.accordion__item {
  border-bottom: 1px solid var(--line-soft);
}

.accordion__trigger {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  width: 100%;
  padding: 1rem 1.25rem;
  background: transparent;
  border: 0;
  color: var(--text-light);
  font-weight: 700;
  text-align: left;
  cursor: pointer;
}

.accordion__trigger:hover {
  background: rgba(0, 255, 156, 0.04);
}

.accordion__trigger::after {
  content: "+";
  font-family: var(--font-mono);
  color: var(--electric-orange);
  font-size: 1.25rem;
  transition: transform var(--transition);
}

.accordion__trigger[aria-expanded="true"]::after {
  content: "−";
  color: var(--neon-green);
}

.accordion__panel {
  padding: 0 1.25rem 1.25rem;
  color: var(--text-dim);
}

.media-frame {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--dark-teal), var(--teal));
  clip-path: var(--clip);
}

.media-frame--16x9 {
  aspect-ratio: 16 / 9;
}

.media-frame--4x3 {
  aspect-ratio: 4 / 3;
}

.media-frame img,
.media-frame__placeholder {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  border: 1px solid rgba(245, 247, 250, 0.08);
}

@media (max-width: 72rem) {
  .grid--three {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 64rem) {
  .site-footer__inner {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }

  .split {
    grid-template-columns: 1fr;
  }

  .split__aside {
    border-right: 0;
    border-bottom: 1px solid var(--line-soft);
    padding-right: 0;
    padding-bottom: 1rem;
  }
}

@media (max-width: 48rem) {
  .masthead {
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
    gap: 0.5rem;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    display: none;
  }

  .site-nav[data-open] {
    display: block;
  }

  .site-nav[data-open] .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.1rem;
    padding: 0.25rem 0.5rem 0.75rem;
  }

  .site-nav__link {
    border-bottom: 1px solid var(--line-soft);
  }

  .site-footer__inner {
    grid-template-columns: 1fr;
    padding-top: 3rem;
  }

  .site-footer__bottom-inner {
    justify-content: center;
    text-align: center;
  }

  .grid--two,
  .grid--three {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 40rem) {
  .masthead__meta {
    gap: 0.4rem;
  }

  .clock {
    font-size: 0.75rem;
    min-width: 0;
  }

  .status-text {
    display: none;
  }

  .status-pill {
    padding: 0.2rem 0.35rem;
  }

  .brand__mark {
    font-size: 1.3rem;
  }

  .brand__sub {
    font-size: 0.55rem;
    letter-spacing: 0.2em;
  }

  .nav-toggle__label {
    display: none;
  }

  .nav-toggle__bar {
    width: 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  .status-dot {
    animation: none;
    box-shadow: 0 0 6px var(--neon-green);
  }

  .card:hover {
    transform: none;
  }
}