:root {
  --c-bg: #0D0F14;
  --c-carbon: #1A1D24;
  --c-lime: #C6FF00;
  --c-cyan: #00E5FF;
  --c-white: #FFFFFF;
  --c-gray: #B0B5C0;
  --c-yellow: #FFD700;
  --c-red: #FF3B30;
  --c-teal: #004B4B;
  --font-heading: "Archivo Black", "Arial Black", "PingFang SC", sans-serif;
  --font-body: "JetBrains Mono", "Courier New", "PingFang SC", monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 82% -10%, rgba(0, 229, 255, 0.14), transparent 42%),
    radial-gradient(circle at 8% 18%, rgba(198, 255, 0, 0.06), transparent 28%),
    var(--c-bg);
  color: var(--c-white);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body.no-scroll {
  overflow: hidden;
}

main {
  display: block;
  min-height: 70vh;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-family: var(--font-heading);
  font-style: italic;
  line-height: 0.95;
  letter-spacing: -0.02em;
  color: var(--c-white);
}

a {
  color: var(--c-lime);
  text-decoration: none;
}

a:hover {
  color: var(--c-cyan);
}

:focus-visible {
  outline: 3px solid var(--c-cyan);
  outline-offset: 3px;
}

::selection {
  background: var(--c-lime);
  color: var(--c-bg);
}

.container {
  width: 100%;
  max-width: 1240px;
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 2rem);
}

.section {
  padding-block: clamp(4rem, 9vw, 7rem);
}

.section--dark {
  background: var(--c-bg);
}

.section--mid {
  background: linear-gradient(135deg, var(--c-carbon), #14171C);
}

.section--glow {
  background: linear-gradient(90deg, rgba(198, 255, 0, 0.07), transparent 64%);
}

.panel {
  padding: clamp(1.25rem, 3vw, 2.25rem);
  background: var(--c-carbon);
  box-shadow: 8px 8px 0 rgba(0, 229, 255, 0.12);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1.5rem, 4vw, 3rem);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(1.25rem, 3vw, 2.25rem);
}

.skip-link {
  position: fixed;
  top: 0.5rem;
  left: 0.5rem;
  z-index: 2000;
  padding: 0.6rem 1rem;
  background: var(--c-lime);
  color: var(--c-bg);
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 700;
  transform: translateY(-320%);
  transition: transform 0.2s ease;
}

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

.site-header {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  z-index: 1000;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.site-header[data-header-state="scrolled"] {
  background: rgba(13, 15, 20, 0.94);
  border-bottom-color: rgba(198, 255, 0, 0.18);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.25);
}

.site-header[data-nav-open="true"] {
  background: rgba(13, 15, 20, 0.98);
}

.site-header__progress {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: rgba(255, 255, 255, 0.06);
  pointer-events: none;
  z-index: 3;
}

.site-header__progress-bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--c-lime), var(--c-cyan));
  box-shadow: 0 0 14px var(--c-lime);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 78px;
  padding-top: 0.65rem;
  padding-bottom: 0.65rem;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--c-white);
  flex: 0 0 auto;
}

.site-brand:hover {
  color: var(--c-white);
}

.site-brand__mark {
  position: relative;
  display: inline-block;
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--c-lime), var(--c-cyan));
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
  transform: rotate(8deg);
}

.site-brand__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 8px;
  height: 8px;
  background: var(--c-bg);
  transform: translate(-50%, -50%) rotate(45deg);
}

.site-brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.site-brand__name {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-style: italic;
  letter-spacing: 0.04em;
}

.site-brand__sub {
  margin-top: 0.3rem;
  font-family: var(--font-body);
  font-size: 0.6rem;
  letter-spacing: 0.32em;
  color: var(--c-gray);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav__link {
  display: block;
  padding: 0.6rem 0.85rem;
  border-bottom: 2px solid transparent;
  color: var(--c-white);
  font-size: 0.92rem;
  letter-spacing: 0.02em;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.site-nav__link:hover {
  color: var(--c-lime);
}

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

.site-nav__toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
  position: relative;
  z-index: 6;
}

.site-nav__toggle-bars {
  position: relative;
  display: block;
  width: 28px;
  height: 20px;
}

.site-nav__toggle-bars span {
  position: absolute;
  left: 0;
  display: block;
  width: 28px;
  height: 2px;
  background: var(--c-lime);
  transition: transform 0.2s ease, top 0.2s ease, background 0.2s ease;
}

.site-nav__toggle-bars span:nth-child(1) {
  top: 0;
}

.site-nav__toggle-bars span:nth-child(2) {
  top: 9px;
  background: var(--c-cyan);
}

.site-nav__toggle-bars span:nth-child(3) {
  top: 18px;
}

.site-nav__toggle[aria-expanded="true"] .site-nav__toggle-bars span:nth-child(1) {
  top: 9px;
  transform: rotate(45deg);
}

.site-nav__toggle[aria-expanded="true"] .site-nav__toggle-bars span:nth-child(2) {
  opacity: 0;
}

.site-nav__toggle[aria-expanded="true"] .site-nav__toggle-bars span:nth-child(3) {
  top: 9px;
  transform: rotate(-45deg);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.85rem 1.5rem;
  border: 1px solid transparent;
  border-radius: 0;
  background: var(--c-lime);
  color: var(--c-bg);
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-style: italic;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  box-shadow: 5px 5px 0 var(--c-cyan);
  cursor: pointer;
  transition: transform 0.16s ease, box-shadow 0.16s ease, background 0.16s ease, color 0.16s ease;
}

.button:hover {
  transform: translate(-2px, -2px);
  color: var(--c-bg);
  box-shadow: 7px 7px 0 var(--c-cyan);
}

.button:active {
  transform: translate(1px, 1px);
  box-shadow: 3px 3px 0 var(--c-cyan);
}

.button--ghost {
  background: transparent;
  color: var(--c-white);
  border-color: rgba(0, 229, 255, 0.75);
  box-shadow: 4px 4px 0 rgba(0, 229, 255, 0.2);
}

.button--ghost:hover {
  background: rgba(0, 229, 255, 0.08);
  color: var(--c-cyan);
}

.button--small {
  padding: 0.55rem 0.9rem;
  font-size: 0.75rem;
  box-shadow: 3px 3px 0 var(--c-cyan);
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0 0 1.2rem;
  font-family: var(--font-body);
  font-size: 0.75rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--c-lime);
}

.kicker::before {
  content: "";
  width: 2.5rem;
  height: 2px;
  background: var(--c-cyan);
}

.display {
  margin: 0;
  font-family: var(--font-heading);
  font-size: clamp(3.5rem, 12vw, 8rem);
  font-style: italic;
  line-height: 0.92;
  letter-spacing: -0.04em;
  text-transform: uppercase;
}

.lead {
  margin: 0;
  font-size: clamp(1rem, 1.6vw, 1.25rem);
  line-height: 1.7;
  color: var(--c-gray);
  max-width: 72ch;
}

.notation {
  writing-mode: vertical-rl;
  font-family: var(--font-body);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-cyan);
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.75rem;
  margin: 0 0 2rem;
  padding: 0;
  list-style: none;
  font-family: var(--font-body);
  font-size: 0.75rem;
  color: var(--c-gray);
}

.breadcrumbs li + li::before {
  content: "/";
  margin-right: 0.75rem;
  color: var(--c-cyan);
}

.breadcrumbs a {
  color: var(--c-gray);
}

.breadcrumbs a:hover {
  color: var(--c-lime);
}

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

.media-frame {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--c-carbon), var(--c-bg));
  border: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: 8px 8px 0 rgba(0, 229, 255, 0.08);
}

.media-frame::before {
  content: "";
  display: block;
}

.media-frame--wide::before {
  padding-top: 56.25%;
}

.media-frame--square::before {
  padding-top: 100%;
}

.media-frame--tall::before {
  padding-top: 125%;
}

.media-frame > img,
.media-frame > video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: contrast(1.08) saturate(1.1);
}

.media-frame::after {
  content: "LIVE / 动态";
  position: absolute;
  left: 12px;
  bottom: 12px;
  padding: 0.25rem 0.55rem;
  font-family: var(--font-body);
  font-size: 0.68rem;
  letter-spacing: 0.15em;
  background: rgba(13, 15, 20, 0.78);
  color: var(--c-lime);
  border: 1px solid rgba(198, 255, 0, 0.35);
}

.acc {
  margin: 0 0 1rem;
  background: rgba(26, 29, 36, 0.7);
  border-left: 3px solid var(--c-cyan);
}

.acc summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem 1.2rem;
  font-family: var(--font-heading);
  font-size: 1.02rem;
  font-style: italic;
  cursor: pointer;
  list-style: none;
}

.acc summary::-webkit-details-marker {
  display: none;
}

.acc summary::after {
  content: "+";
  color: var(--c-lime);
  font-family: var(--font-body);
  font-size: 1.3rem;
  transition: transform 0.2s ease;
}

.acc[open] summary::after {
  content: "−";
  transform: rotate(180deg);
}

.acc__body {
  padding: 0 1.2rem 1.2rem;
  color: var(--c-gray);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-body);
  font-size: 0.85rem;
}

.data-table th {
  padding: 0.6rem 0.5rem;
  text-align: left;
  color: var(--c-lime);
  border-bottom: 1px solid var(--c-cyan);
}

.data-table td {
  padding: 0.6rem 0.5rem;
  color: var(--c-gray);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.data-table td strong {
  color: var(--c-white);
}

.stat {
  display: grid;
  gap: 0.35rem;
  padding: 1.25rem;
  background: var(--c-carbon);
}

.stat__num {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-style: italic;
  line-height: 1;
  color: var(--c-lime);
}

.stat__label {
  font-family: var(--font-body);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-gray);
}

[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

[data-reveal][data-revealed="true"] {
  opacity: 1;
  transform: none;
}

.site-footer {
  position: relative;
  margin-top: auto;
  background: #0A0C11;
  border-top: 1px solid var(--c-carbon);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--c-lime), var(--c-cyan) 34%, transparent 72%);
  opacity: 0.38;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.7fr);
  gap: clamp(2rem, 5vw, 4rem);
  padding-block: clamp(3rem, 7vw, 5rem) 2rem;
}

.site-footer__brand {
  min-width: 0;
}

.site-footer__desc {
  max-width: 62ch;
  margin: 1rem 0 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--c-gray);
}

.site-footer__trust {
  max-width: 66ch;
  margin: 1.25rem 0 0;
  padding-left: 0.8rem;
  border-left: 3px solid var(--c-cyan);
  font-size: 0.8rem;
  color: var(--c-gray);
}

.site-footer__contact {
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-style: normal;
}

.site-footer__contact-list {
  display: grid;
  gap: 0.45rem;
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--c-gray);
  font-family: var(--font-body);
  font-size: 0.82rem;
}

.site-footer__contact-label {
  margin-right: 0.5rem;
  color: var(--c-lime);
}

.site-footer__links {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.site-footer__heading {
  margin: 0 0 1rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid var(--c-cyan);
  font-size: 1rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.site-footer__nav {
  display: grid;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-footer__link {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--c-gray);
  font-size: 0.95rem;
  transition: color 0.2s ease, transform 0.2s ease;
}

.site-footer__link::before {
  content: "";
  width: 0;
  height: 2px;
  background: var(--c-lime);
  transition: width 0.2s ease;
}

.site-footer__link:hover {
  color: var(--c-lime);
  transform: translateX(2px);
}

.site-footer__link:hover::before {
  width: 1rem;
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding-block: 1.25rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--c-gray);
  font-family: var(--font-body);
  font-size: 0.78rem;
}

.site-footer__copyright,
.site-footer__icp {
  margin: 0;
}

.site-footer__icp {
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

@media (max-width: 900px) {
  .header-actions {
    display: none;
  }

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

  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 5;
    width: min(82vw, 340px);
    padding-top: 105px;
    overflow-y: auto;
    background: #11141A;
    border-left: 1px solid var(--c-cyan);
    box-shadow: -20px 0 60px rgba(0, 0, 0, 0.5);
    transform: translateX(102%);
    transition: transform 0.3s ease;
  }

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

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

  .site-nav__link {
    padding: 1rem 1.4rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    border-left: 3px solid transparent;
    font-size: 1rem;
  }

  .site-nav__link:hover {
    background: rgba(198, 255, 0, 0.05);
  }

  .site-nav__link[aria-current="page"] {
    border-left-color: var(--c-lime);
    border-bottom-color: rgba(198, 255, 0, 0.3);
    color: var(--c-lime);
  }

  .site-footer__grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 860px) {
  .grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 600px) {
  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }

  .site-header__inner {
    min-height: 68px;
  }

  .site-brand__sub {
    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;
  }

  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }
}