:root {
  --bg-void: #0A1B2A;
  --bg-panel: #0D2B3E;
  --bg-footer: #07131F;
  --color-acid: #39FF14;
  --color-gold: #FFD700;
  --color-silver: #E5E7EB;
  --color-white: #FFFFFF;
  --color-crimson: #8B1E3F;
  --text-body: #E5E7EB;
  --text-muted: #9AA7B4;
  --line-soft: rgba(255, 255, 255, .08);
  --line-acid: rgba(57, 255, 20, .22);
  --font-heading: "Rajdhani", "DIN Alternate", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Serif SC", "Songti SC", serif;
  --font-mono: "Roboto Mono", "SF Mono", Consolas, monospace;
  --gradient-green: linear-gradient(135deg, #39FF14, #00BFFF);
  --max-width: 1440px;
  --gap-page: clamp(20px, 4vw, 56px);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg-void);
  color: var(--text-body);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
}

h1, h2, h3, h4 {
  margin: 0 0 .5em;
  font-family: var(--font-heading);
  line-height: 1.12;
  color: var(--color-white);
}

p {
  margin: 0 0 1em;
}

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

a {
  color: inherit;
}

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

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

:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  top: -5rem;
  left: 1rem;
  z-index: 100;
  padding: .8rem 1.1rem;
  background: var(--color-acid);
  color: var(--bg-void);
  font-family: var(--font-heading);
  font-weight: 700;
  text-decoration: none;
  border-radius: 2px;
  transition: top .2s ease;
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  position: relative;
  z-index: 50;
  overflow: hidden;
  background: linear-gradient(115deg, #0A1B2A 0%, #0D2B3E 50%, #081A29 100%);
  border-bottom: 1px solid var(--line-acid);
}

.site-header::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-acid), var(--color-gold), transparent);
  transform: translateX(-100%);
  animation: header-sweep .9s ease-out .35s forwards;
  pointer-events: none;
}

.header-stage {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--gap-page);
}

.header-sponsor {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.25rem 0 .75rem;
}

.header-brand {
  display: flex;
  align-items: baseline;
  gap: .75rem;
  min-width: 0;
}

.brand-mark {
  display: inline-flex;
  align-items: baseline;
  gap: .08em;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(1.9rem, 3vw, 2.6rem);
  line-height: .9;
  color: var(--color-white);
  text-decoration: none;
  letter-spacing: -.02em;
  white-space: nowrap;
}

.brand-index {
  color: var(--color-acid);
  text-shadow: 0 0 18px rgba(57, 255, 20, .35);
}

.brand-body {
  color: var(--color-white);
}

.header-slogan {
  margin: 0;
  font-size: clamp(.75rem, 1.2vw, .95rem);
  color: var(--text-body);
  letter-spacing: .12em;
  white-space: nowrap;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: .875rem;
  flex-shrink: 0;
}

.header-channel {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding-left: 1rem;
  border-left: 1px solid rgba(57, 255, 20, .25);
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--text-body);
}

.channel-label {
  color: var(--text-muted);
  letter-spacing: .08em;
  text-transform: uppercase;
}

.channel-status {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  color: var(--color-acid);
  font-weight: 700;
}

.status-dot {
  width: .52rem;
  height: .52rem;
  border-radius: 50%;
  background: var(--color-acid);
  box-shadow: 0 0 8px var(--color-acid);
  animation: pulse 2.2s ease-in-out infinite;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .65rem 1.1rem;
  border: 1px solid transparent;
  border-radius: 2px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: .95rem;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition: background-color .2s ease, border-color .2s ease, color .2s ease, transform .2s ease;
}

.btn-ghost {
  background: rgba(57, 255, 20, .08);
  border-color: rgba(57, 255, 20, .38);
  color: var(--color-acid);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  background: rgba(57, 255, 20, .18);
  border-color: var(--color-acid);
  color: var(--color-white);
  transform: translateY(-1px);
}

.btn-cta {
  letter-spacing: .04em;
}

.site-nav {
  border-top: 1px solid rgba(255, 255, 255, .08);
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
}

.nav-item {
  display: flex;
  align-items: center;
  padding: 0;
}

.nav-item::before {
  content: attr(data-index);
  margin-right: .65rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  color: var(--color-acid);
  opacity: .75;
  letter-spacing: .05em;
}

.nav-link {
  position: relative;
  display: block;
  padding: .8rem 1.1rem .8rem 0;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-body);
  text-decoration: none;
  letter-spacing: .03em;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 1.1rem;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-acid), var(--color-gold));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .2s ease;
}

.nav-link:hover,
.nav-link:focus-visible,
.nav-link[aria-current="page"] {
  color: var(--color-acid);
}

.nav-link:hover::after,
.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
}

.header-progress {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-acid), var(--color-gold));
  transform: scaleX(0);
  transform-origin: left center;
  pointer-events: none;
  z-index: 2;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: .5rem;
  border: 0;
  background: transparent;
  color: var(--text-body);
  font-family: var(--font-heading);
  font-weight: 700;
  cursor: pointer;
  padding: .5rem .25rem;
}

.nav-toggle-box {
  position: relative;
  width: 1.4rem;
  height: 1rem;
}

.nav-toggle-bar,
.nav-toggle-bar::before,
.nav-toggle-bar::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-acid);
  border-radius: 2px;
  transition: transform .2s ease, background-color .2s ease;
}

.nav-toggle-bar {
  top: 50%;
  transform: translateY(-50%);
}

.nav-toggle-bar::before {
  top: -.35rem;
}

.nav-toggle-bar::after {
  top: .35rem;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar::before {
  transform: translateY(.35rem) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar::after {
  transform: translateY(-.35rem) rotate(-45deg);
}

.site-footer {
  position: relative;
  overflow: hidden;
  background: var(--bg-footer);
  border-top: 1px solid rgba(57, 255, 20, .2);
  color: var(--text-body);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 32rem;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(57, 255, 20, .6), transparent);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, .8fr) minmax(0, 1fr);
  gap: 2.5rem;
  max-width: var(--max-width);
  margin-inline: auto;
  padding: 4rem var(--gap-page) 2.5rem;
}

.site-footer .brand-mark {
  font-size: 2rem;
}

.footer-desc {
  margin-top: 1rem;
  font-size: 1.05rem;
  color: var(--text-body);
}

.footer-trust {
  max-width: 42rem;
  margin-top: 1rem;
  font-size: .8rem;
  line-height: 1.7;
  color: var(--text-muted);
}

.footer-title {
  position: relative;
  margin: 0 0 1rem;
  padding-bottom: .5rem;
  font-family: var(--font-heading);
  font-size: 1rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--color-acid);
}

.footer-title::after {
  content: "";
  display: block;
  width: 2rem;
  height: 2px;
  margin-top: .4rem;
  background: var(--color-gold);
}

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

.footer-link {
  display: inline-block;
  padding: .35rem 0;
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--text-body);
  text-decoration: none;
  transition: color .2s ease, transform .2s ease;
}

.footer-link:hover,
.footer-link:focus-visible {
  color: var(--color-acid);
  transform: translateX(2px);
}

.contact-list {
  margin-top: 1rem;
}

.contact-item {
  display: flex;
  gap: .75rem;
  padding: .25rem 0;
  font-size: .85rem;
}

.contact-label {
  flex-shrink: 0;
  padding-top: .2rem;
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--color-gold);
}

.contact-value {
  color: var(--text-body);
  word-break: break-word;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  max-width: var(--max-width);
  margin-inline: auto;
  padding: 1.5rem var(--gap-page);
  border-top: 1px solid rgba(255, 255, 255, .08);
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--text-muted);
}

.footer-copy,
.footer-icp {
  margin: 0;
}

.back-top {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 60;
  width: 3rem;
  height: 3rem;
  border: 1px solid rgba(57, 255, 20, .5);
  border-radius: 50%;
  background: rgba(13, 43, 62, .92);
  color: var(--color-acid);
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  pointer-events: none;
  transition: opacity .2s ease, visibility .2s ease, transform .2s ease, background-color .2s ease;
}

.back-top[data-visible="true"] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

.back-top:hover,
.back-top:focus-visible {
  background: rgba(57, 255, 20, .2);
  color: var(--color-white);
}

.back-top-icon {
  display: block;
  font-family: var(--font-mono);
}

.container,
.content-wrap {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--gap-page);
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  padding: 1.25rem 0;
  font-family: var(--font-mono);
  font-size: .8rem;
}

.breadcrumbs li + li::before {
  content: "/";
  margin-right: .5rem;
  color: var(--text-muted);
}

.breadcrumbs a {
  color: var(--color-acid);
  text-decoration: none;
}

.breadcrumbs [aria-current="page"] {
  color: var(--color-gold);
}

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

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

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

.grid-dashboard {
  grid-template-columns: minmax(0, 1.25fr) minmax(20rem, .85fr);
  align-items: start;
}

.media-frame {
  position: relative;
  overflow: hidden;
  min-height: 12rem;
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, var(--bg-panel), var(--bg-void));
  border: 1px solid rgba(57, 255, 20, .14);
}

.media-frame::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-acid), var(--color-gold));
  opacity: .7;
}

.tablist {
  display: flex;
  flex-wrap: wrap;
  gap: .25rem;
  margin: 0;
  padding: 0;
  border-bottom: 1px solid rgba(255, 255, 255, .12);
  list-style: none;
}

.tab {
  appearance: none;
  border: 0;
  border-bottom: 2px solid transparent;
  background: transparent;
  padding: .75rem 1rem;
  margin-bottom: -1px;
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--text-muted);
  cursor: pointer;
  transition: color .2s ease, border-color .2s ease;
}

.tab:hover,
.tab:focus-visible {
  color: var(--color-acid);
}

.tab[aria-selected="true"] {
  color: var(--color-acid);
  border-bottom-color: var(--color-acid);
}

.tabpanel {
  padding: 1.5rem 0;
}

[hidden] {
  display: none !important;
}

@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

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

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

@media (max-width: 900px) {
  .header-sponsor {
    padding-top: .85rem;
    padding-bottom: .85rem;
  }

  .header-channel {
    display: none;
  }

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

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    z-index: 40;
    padding: 1rem var(--gap-page) 1.5rem;
    background: rgba(10, 27, 42, .96);
    border-top: 1px solid rgba(57, 255, 20, .18);
    box-shadow: 0 1rem 2rem rgba(0, 0, 0, .3);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
  }

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

  .nav-list {
    flex-direction: column;
  }

  .nav-item {
    border-bottom: 1px solid rgba(255, 255, 255, .06);
  }

  .nav-item::before {
    display: none;
  }

  .nav-link {
    padding: .95rem 0;
    font-size: 1.15rem;
  }

  .nav-link::after {
    right: 0;
  }

  .header-actions {
    gap: .5rem;
  }

  .btn-cta {
    padding: .55rem .85rem;
    font-size: .85rem;
  }
}

@media (max-width: 660px) {
  .header-slogan {
    display: none;
  }

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

  .footer-brand,
  .footer-contact {
    grid-column: auto;
  }

  .footer-legal {
    flex-direction: column;
    align-items: flex-start;
  }

  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }

  50% {
    opacity: .5;
    transform: scale(.8);
  }
}

@keyframes header-sweep {
  100% {
    transform: translateX(100%);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }

  .status-dot {
    animation: none;
  }

  .site-header::before {
    display: none;
  }
}