:root {
  --bg-deep: #0A192F;
  --bg-mid: #0F2A43;
  --bg-surface: #112240;
  --bg-card: #112240;
  --text-light: #E6F1FF;
  --text-secondary: #8892B0;
  --accent-green: #39FF14;
  --accent-orange: #FF6B35;
  --border-line: #233554;
  --data-cyan: #0BC5EA;
  --data-warn: #F6AD55;
  --font-display: "Archivo Black", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  --track-side: 18.75rem;
  --container-width: 80rem;
  --header-h: 5rem;
  --radius-card: 0;
  --transition-fast: 0.18s ease;
  --shadow-float: 0 0.5rem 2rem rgba(0, 0, 0, 0.4);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg-deep);
  color: var(--text-light);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

button {
  font-family: inherit;
  border: 0;
  background: none;
  cursor: pointer;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  margin: 0 0 1rem;
  line-height: 1.15;
}

p {
  margin: 0 0 1rem;
}

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

.jump-link {
  position: fixed;
  top: -5rem;
  left: 1rem;
  z-index: 3000;
  background: var(--accent-green);
  color: #06121f;
  font-weight: 700;
  padding: 0.75rem 1.25rem;
  transition: top var(--transition-fast);
}

.jump-link:focus-visible {
  top: 1rem;
}

.orbit-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1200;
  width: 100%;
  background: rgba(10, 25, 47, 0.88);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-line);
}

.orbit-header__inner {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  max-width: var(--container-width);
  width: 100%;
  margin: 0 auto;
  padding: 0.75rem 2rem;
  min-height: var(--header-h);
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
  border-right: 1px solid var(--border-line);
  padding-right: 1.5rem;
}

.brand-lockup__svg {
  width: 2.5rem;
  height: 2.5rem;
  flex-shrink: 0;
}

.brand-lockup__svg svg {
  border: 1px solid var(--border-line);
}

.brand-lockup__text {
  position: relative;
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: 0.03em;
  line-height: 1;
  color: var(--text-light);
}

.brand-lockup__badge {
  position: absolute;
  top: -0.35rem;
  right: -2.75rem;
  font-family: var(--font-mono);
  font-size: 0.52rem;
  letter-spacing: 0.14em;
  color: var(--accent-green);
  border: 1px solid var(--accent-green);
  padding: 0.14rem 0.3rem;
  line-height: 1;
  white-space: nowrap;
}

.nav-pill__list {
  display: flex;
  align-items: center;
  gap: 0.1rem;
  flex-wrap: wrap;
}

.nav-pill__link {
  display: inline-block;
  padding: 0.55rem 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-secondary);
  letter-spacing: 0.04em;
  border-radius: 999px;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-pill__link:hover {
  color: var(--text-light);
  background: rgba(57, 255, 20, 0.08);
}

.nav-pill__link[aria-current="page"] {
  color: var(--accent-green);
  background: rgba(57, 255, 20, 0.12);
  box-shadow: inset 0 0 0 1px rgba(57, 255, 20, 0.4);
}

.header-ticker {
  margin-left: auto;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  line-height: 1.2;
  padding-left: 1.25rem;
  border-left: 1px solid var(--border-line);
}

.header-ticker__label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--text-secondary);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.header-ticker__value {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-light);
  font-weight: 600;
  margin-top: 0.15rem;
}

.nav-toggle {
  display: none;
  width: 2.75rem;
  height: 2.75rem;
  margin-left: auto;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.3rem;
  border: 1px solid var(--border-line);
  background: transparent;
  border-radius: 999px;
  position: relative;
  z-index: 1400;
}

.nav-toggle__bar {
  display: block;
  width: 1.1rem;
  height: 2px;
  background: var(--text-light);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

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

.site-footer {
  background: var(--bg-mid);
  border-top: 2px solid var(--accent-green);
  margin-top: 5rem;
  padding: 4rem 2rem 2rem;
}

.site-footer__inner {
  max-width: var(--container-width);
  margin: 0 auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 3fr 1fr 1.2fr;
  gap: 3rem;
  padding-bottom: 3rem;
}

.footer-grid__brand {
  max-width: 34rem;
}

.footer-brand-name {
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--text-light);
  margin-bottom: 0.75rem;
  letter-spacing: 0.02em;
}

.footer-brand-desc {
  color: var(--text-secondary);
  font-size: 0.92rem;
  max-width: 30rem;
  margin-bottom: 1rem;
}

.footer-contact {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
}

.footer-contact__item {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--data-cyan);
}

.footer-heading {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  margin-bottom: 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-line);
}

.footer-list li {
  margin-bottom: 0.6rem;
}

.footer-link {
  font-size: 0.92rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast), padding-left 0.2s ease;
}

.footer-link:hover {
  color: var(--accent-green);
  padding-left: 0.3rem;
}

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 2rem;
  align-items: center;
  border-top: 1px solid var(--border-line);
  padding-top: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.reveal-frame {
  position: relative;
  border: 1px solid var(--border-line);
  background: var(--bg-surface);
  box-shadow: var(--shadow-float);
}

.reveal-frame::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 2.25rem;
  height: 2.25rem;
  border-top: 3px solid var(--accent-green);
  border-left: 3px solid var(--accent-green);
  pointer-events: none;
}

.reveal-frame::after {
  content: "";
  position: absolute;
  bottom: -1px;
  right: -1px;
  width: 2.25rem;
  height: 2.25rem;
  border-bottom: 3px solid var(--accent-orange);
  border-right: 3px solid var(--accent-orange);
  pointer-events: none;
}

.data-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.data-label::before {
  content: "";
  display: inline-block;
  width: 1.5rem;
  height: 1px;
  background: var(--accent-green);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
  gap: 1rem;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-line);
  padding: 1.2rem 1rem;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.stat-card:hover {
  border-color: var(--accent-green);
}

.stat-card__value {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-light);
  line-height: 1;
}

.stat-card__label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 0.5rem;
  display: block;
}

.tag-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag-filter__btn {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--border-line);
  border-radius: 0;
  background: var(--bg-deep);
  transition: all var(--transition-fast);
  letter-spacing: 0.04em;
}

.tag-filter__btn:hover {
  color: var(--text-light);
  border-color: var(--text-secondary);
}

.tag-filter__btn[data-active="true"] {
  color: #06121f;
  background: var(--accent-green);
  border-color: var(--accent-green);
  font-weight: 700;
}

.filterable-card {
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.filterable-card[data-hidden="true"] {
  display: none;
}

.toc-side {
  border-left: 2px solid var(--accent-green);
  padding-left: 1rem;
}

.toc-side__link {
  display: block;
  padding: 0.35rem 0;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.toc-side__link:hover {
  color: var(--accent-green);
}

.toc-side__link[data-active="true"] {
  color: var(--accent-green);
}

@media (max-width: 62rem) {
  .nav-pill {
    position: fixed;
    top: 0;
    right: -70vw;
    width: min(70vw, 19rem);
    height: 100vh;
    background: rgba(10, 25, 47, 0.98);
    border-left: 1px solid var(--border-line);
    padding: calc(var(--header-h) + 2rem) 1.5rem 1.5rem;
    transition: right 0.3s ease;
  }

  .nav-pill[data-open="true"] {
    right: 0;
  }

  .nav-pill__list {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.6rem;
  }

  .nav-pill__link {
    font-size: 1rem;
    padding: 0.6rem 1rem;
  }

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

  .orbit-header__inner {
    gap: 1rem;
  }

  .header-ticker {
    margin-left: auto;
    padding-left: 1rem;
    border-left: none;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }

  .footer-grid__brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 40rem) {
  .orbit-header__inner {
    padding: 0.65rem 1rem;
    min-height: 4.5rem;
  }

  .brand-lockup {
    border-right: none;
    padding-right: 0.25rem;
  }

  .brand-lockup__text {
    font-size: 1rem;
  }

  .brand-lockup__badge {
    display: none;
  }

  .header-ticker {
    display: none;
  }

  .nav-pill {
    width: min(85vw, 20rem);
    right: -85vw;
    padding-left: 1.25rem;
  }

  .site-footer {
    padding: 3rem 1rem 1.5rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2.2rem;
    padding-bottom: 2rem;
  }

  .footer-grid__brand {
    grid-column: 1;
  }

  .footer-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.4rem;
  }

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

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}