:root {
  --color-ink: #0A1128;
  --color-coal: #111827;
  --color-gold: #F5B301;
  --color-neon: #39FF14;
  --color-violet: #4C1D95;
  --color-wine: #722F37;
  --color-teal: #0F4C5C;
  --color-text: #E5E7EB;
  --color-muted: #9CA3AF;
  --color-line: rgba(245,179,1,0.4);
  --rail-width: 288px;
  --content-max: 1180px;
  --font-display: 'Oswald', 'Impact', 'Noto Sans SC', 'PingFang SC', sans-serif;
  --font-body: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', sans-serif;
  --focus-outline: 3px solid rgba(57,255,20,0.9);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  margin: 0;
  padding-left: var(--rail-width);
  min-height: 100vh;
  background: var(--color-ink);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  line-height: 1.1;
  color: #F3F4F6;
  margin: 0 0 0.75rem;
}

p {
  margin: 0 0 1rem;
}

a {
  color: var(--color-gold);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

button {
  font-family: var(--font-body);
}

ul, ol {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
}

[hidden] {
  display: none !important;
}

.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;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 2000;
  transform: translateY(-260%);
  background: var(--color-gold);
  color: var(--color-ink);
  padding: 0.65rem 1rem;
  font-weight: 700;
  text-decoration: none;
  border: 1px solid var(--color-ink);
  transition: transform 0.2s ease;
}

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

a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
  outline: var(--focus-outline);
  outline-offset: 3px;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--rail-width);
  height: 100vh;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  padding: 1.5rem 1.25rem 1.5rem;
  background:
    linear-gradient(180deg, rgba(245,179,1,0.08), transparent 12rem),
    linear-gradient(135deg, rgba(76,29,149,0.35), transparent 40%),
    var(--color-coal);
  border-right: 1px solid var(--color-line);
  overflow-y: auto;
}

.site-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-gold) 0 70%, var(--color-neon) 70% 100%);
  pointer-events: none;
}

.site-header::after {
  content: '';
  position: absolute;
  left: -10%;
  top: 6.5rem;
  width: 130%;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(245,179,1,0.5), transparent);
  transform: rotate(-2deg);
  pointer-events: none;
}

.brand {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0 1rem;
  border-bottom: 1px solid var(--color-line);
  text-decoration: none;
}

.brand__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.65rem;
  font-weight: 900;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--color-ink);
  background: var(--color-gold);
  padding: 0.28rem 0.42rem;
}

.brand__copy {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.brand__zh {
  color: #F3F4F6;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.brand__sub {
  font-size: 0.7rem;
  color: var(--color-muted);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.header-nav {
  position: relative;
  z-index: 1;
  margin-top: 1.5rem;
}

.header-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.header-nav__item {
  margin: 0;
}

.header-nav__link {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 0.5rem;
  border-bottom: 1px solid rgba(229,231,235,0.07);
  color: var(--color-muted);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: color 0.2s ease, background 0.2s ease, padding-left 0.2s ease, border-color 0.2s ease;
}

.header-nav__link:hover {
  color: var(--color-gold);
  background: linear-gradient(90deg, rgba(245,179,1,0.12), transparent);
  padding-left: 0.75rem;
}

.header-nav__link[aria-current="page"] {
  color: var(--color-gold);
  background: linear-gradient(90deg, rgba(245,179,1,0.18), transparent);
  border-left: 2px solid var(--color-neon);
}

.header-nav__link[aria-current="page"]::after {
  content: '';
  width: 8px;
  height: 8px;
  margin-left: auto;
  background: var(--color-neon);
  box-shadow: 0 0 8px rgba(57,255,20,0.8);
}

.header-nav__index {
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--color-gold);
  opacity: 0.75;
}

.header-meta {
  position: relative;
  z-index: 1;
  margin-top: auto;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-line);
  display: grid;
  gap: 0.75rem;
}

.header-meta__status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
  color: var(--color-muted);
  font-size: 0.875rem;
}

.header-meta__info {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.75rem;
  line-height: 1.6;
  letter-spacing: 0.06em;
}

.live-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-neon);
  box-shadow: 0 0 0 0 rgba(57,255,20,0.6);
  animation: live-pulse 2s infinite;
}

@keyframes live-pulse {
  70% {
    box-shadow: 0 0 0 8px rgba(57,255,20,0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(57,255,20,0);
  }
}

.header-nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--color-line);
  background: transparent;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.header-nav-toggle__bars,
.header-nav-toggle__bars::before,
.header-nav-toggle__bars::after {
  content: '';
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-gold);
  position: relative;
  transition: transform 0.2s ease, top 0.2s ease, background 0.2s ease;
}

.header-nav-toggle__bars::before {
  position: absolute;
  top: -6px;
}

.header-nav-toggle__bars::after {
  position: absolute;
  top: 6px;
}

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

.header-nav-toggle[aria-expanded="true"] .header-nav-toggle__bars::before {
  top: 0;
  transform: rotate(45deg);
}

.header-nav-toggle[aria-expanded="true"] .header-nav-toggle__bars::after {
  top: 0;
  transform: rotate(-45deg);
}

.site-progress {
  position: absolute;
  top: 0;
  right: -1px;
  width: 2px;
  height: 100%;
  background: rgba(229,231,235,0.08);
  z-index: 1200;
  pointer-events: none;
}

.site-progress__bar {
  display: block;
  width: 100%;
  height: 0;
  background: linear-gradient(180deg, var(--color-gold), var(--color-neon));
}

.back-to-top {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 900;
  background: var(--color-gold);
  color: var(--color-ink);
  border: 0;
  padding: 0.65rem 0.9rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 0 0 1px rgba(0,0,0,0.5), 0 8px 24px rgba(0,0,0,0.4);
}

.back-to-top::before {
  content: '↑';
  display: inline-block;
  margin-right: 0.3rem;
  font-weight: 900;
}

.back-to-top:hover {
  background: var(--color-neon);
  color: #000;
}

@media (max-width: 1100px) {
  :root {
    --rail-width: 240px;
  }

  .site-header {
    padding: 1.25rem 1rem;
  }

  .brand__mark {
    font-size: 1.4rem;
  }
}

@media (max-width: 900px) {
  body {
    padding-left: 0;
  }

  .site-header {
    position: sticky;
    top: 0;
    left: 0;
    width: 100%;
    height: auto;
    min-height: 64px;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem 1rem;
    padding: 0.75rem 1rem;
    border-right: 0;
    border-bottom: 1px solid var(--color-line);
    overflow: visible;
  }

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

  .brand {
    min-width: 0;
    flex: 1 1 auto;
    border-bottom: 0;
    padding: 0;
  }

  .brand__mark {
    font-size: 1.3rem;
  }

  .brand__sub {
    display: none;
  }

  .header-nav {
    order: 10;
    flex-basis: 100%;
    margin-top: 0;
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    transition: max-height 0.3s ease, visibility 0.3s ease, border-color 0.3s ease;
  }

  .header-nav[data-open="true"] {
    max-height: calc(100vh - 64px);
    overflow-y: auto;
    visibility: visible;
    border-top: 1px solid var(--color-line);
    margin-top: 0.75rem;
  }

  .header-nav__list {
    padding: 0.5rem 0;
  }

  .header-nav__link {
    border-bottom: 0;
    border-left: 2px solid transparent;
  }

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

  .header-meta {
    display: none;
  }

  .header-nav-toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .site-progress {
    position: fixed;
    top: 0;
    left: 0;
    right: auto;
    width: 100%;
    height: 3px;
    background: rgba(229,231,235,0.12);
  }

  .site-progress__bar {
    width: 0;
    height: 100%;
    background: linear-gradient(90deg, var(--color-gold), var(--color-neon));
  }
}

.site-footer {
  background:
    linear-gradient(180deg, rgba(11,17,40,0.92), rgba(17,24,39,1)),
    var(--color-coal);
  border-top: 1px solid var(--color-line);
}

.site-footer__inner {
  max-width: var(--content-max);
  margin-inline: auto;
  padding: 4rem 2rem 2.5rem;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.6fr 0.9fr 1fr 1.2fr;
  gap: 2.5rem;
}

.site-footer__brand {
  display: grid;
  align-content: start;
  gap: 1rem;
}

.footer-brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.75rem;
  text-decoration: none;
}

.footer-brand__cn {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: #F3F4F6;
}

.footer-brand__en {
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--color-gold);
  text-transform: uppercase;
}

.footer-lead {
  color: var(--color-muted);
  font-size: 0.9rem;
  margin: 0;
}

.site-footer__note {
  margin: 0;
  padding-left: 1rem;
  border-left: 2px solid var(--color-gold);
  color: var(--color-muted);
  font-size: 0.8125rem;
  line-height: 1.7;
}

.site-footer__col {
  display: grid;
  align-content: start;
  gap: 0.9rem;
}

.footer-title {
  margin: 0 0 0.35rem;
  padding-bottom: 0.45rem;
  border-bottom: 1px solid var(--color-line);
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--color-gold);
  text-transform: uppercase;
}

.footer-nav__list,
.footer-contact__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.45rem;
}

.footer-nav__link {
  display: inline-block;
  color: var(--color-muted);
  font-size: 0.9375rem;
  text-decoration: none;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.footer-nav__link:hover {
  color: var(--color-neon);
  padding-left: 0.25rem;
}

.footer-nav__link[aria-current="page"] {
  color: var(--color-neon);
}

.site-footer__contact {
  gap: 0.9rem;
}

.footer-info {
  display: grid;
  gap: 0.1rem;
}

.footer-info__label {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--color-muted);
  text-transform: uppercase;
}

.footer-info__value {
  color: var(--color-text);
  font-size: 0.9375rem;
  word-break: break-all;
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  margin-top: 3rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-line);
  color: var(--color-muted);
  font-size: 0.8125rem;
}

.site-footer__bottom p {
  margin: 0;
}

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

.section {
  position: relative;
  padding-block: 4rem;
}

.section--tight {
  padding-block: 2.5rem;
}

.section__index {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0 0 0.35rem;
  color: var(--color-gold);
  font-family: var(--font-display);
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.section__index::after {
  content: '';
  width: 2.5rem;
  height: 1px;
  background: var(--color-gold);
}

.section__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 4rem);
  line-height: 0.95;
  margin: 0 0 1rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: #F4F4F5;
}

.section__lead {
  max-width: 44rem;
  margin: 0 0 1.5rem;
  color: var(--color-muted);
  font-size: 1.0625rem;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0;
  font-size: 0.875rem;
  color: var(--color-muted);
}

.breadcrumbs li + li::before {
  content: '/';
  margin-right: 0.5rem;
  color: var(--color-gold);
}

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

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

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.1rem;
  background: transparent;
  border: 1px solid var(--color-gold);
  color: var(--color-gold);
  font-weight: 700;
  font-family: var(--font-body);
  text-decoration: none;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn:hover {
  background: rgba(245,179,1,0.12);
  color: var(--color-gold);
}

.btn--primary {
  background: var(--color-gold);
  color: var(--color-ink);
  border-color: var(--color-gold);
}

.btn--primary:hover {
  background: var(--color-neon);
  border-color: var(--color-neon);
  color: #000;
}

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

.btn--ghost:hover {
  background: rgba(245,179,1,0.12);
  color: var(--color-gold);
}

.grid {
  display: grid;
  gap: 1rem;
}

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

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

.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1rem;
  grid-auto-flow: dense;
}

.bento-grid > * {
  grid-column: span 4;
}

.bento-grid > .bento-grid__wide {
  grid-column: span 8;
}

.offset-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 2rem;
}

.offset-grid > *:nth-child(2) {
  transform: translateY(2.5rem);
}

.card {
  position: relative;
  background: var(--color-coal);
  border: 1px solid rgba(255,255,255,0.08);
  padding: 1.25rem;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(245,179,1,0.6);
}

.tag {
  display: inline-block;
  padding: 0.15rem 0.6rem;
  border: 1px solid var(--color-line);
  background: rgba(17,24,39,0.8);
  color: var(--color-muted);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
}

.tag--gold {
  border-color: var(--color-gold);
  color: var(--color-gold);
}

.tag--neon {
  border-color: rgba(57,255,20,0.5);
  color: var(--color-neon);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

.data-table th,
.data-table td {
  border-bottom: 1px solid var(--color-line);
  padding: 0.75rem 0.5rem;
  text-align: left;
}

.data-table thead th {
  color: var(--color-gold);
  font-family: var(--font-display);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.data-table tbody tr:hover {
  background: rgba(245,179,1,0.05);
}

.media {
  position: relative;
  overflow: hidden;
  background: var(--color-coal);
  border: 1px solid var(--color-line);
}

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

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

.media--1-1 {
  aspect-ratio: 1 / 1;
}

.media__placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: var(--color-muted);
  font-family: var(--font-display);
  letter-spacing: 0.14em;
  background:
    linear-gradient(135deg, rgba(245,179,1,0.06), transparent 45%, rgba(57,255,20,0.06)),
    linear-gradient(180deg, rgba(15,76,92,0.3), rgba(17,24,39,0.6)),
    var(--color-coal);
}

.media__placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(245,179,1,0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(245,179,1,0.08) 1px, transparent 1px);
  background-size: 24px 24px;
}

.media__title {
  position: relative;
  z-index: 1;
  margin: 0;
  color: var(--color-gold);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

.accordion {
  border: 1px solid var(--color-line);
  background: var(--color-coal);
}

.accordion__item + .accordion__item {
  border-top: 1px solid var(--color-line);
}

.accordion__trigger {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: 1rem;
  background: transparent;
  border: 0;
  color: var(--color-text);
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
}

.accordion__trigger::after {
  content: '+';
  color: var(--color-gold);
  font-size: 1.25rem;
  transition: transform 0.2s ease;
}

.accordion__trigger[aria-expanded="true"]::after {
  transform: rotate(45deg);
}

.accordion__panel {
  padding: 0 1rem 1rem;
  color: var(--color-muted);
}

.u-muted {
  color: var(--color-muted);
}

.u-gold {
  color: var(--color-gold);
}

.u-neon {
  color: var(--color-neon);
}

.u-display {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

@media (max-width: 1100px) {
  .site-footer__grid {
    grid-template-columns: 1.4fr 1fr 1fr;
  }

  .site-footer__brand {
    grid-column: 1 / -1;
  }

  .site-footer__note {
    max-width: 52rem;
  }
}

@media (max-width: 900px) {
  .site-footer__inner {
    padding-top: 2.75rem;
  }

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

  .site-footer__brand {
    grid-column: 1 / -1;
  }

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

  .bento-grid > * {
    grid-column: span 6;
  }

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

  .offset-grid > *:nth-child(2) {
    transform: none;
  }
}

@media (max-width: 600px) {
  :root {
    --content-max: 100%;
  }

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

  .site-footer__bottom {
    flex-direction: column;
  }

  .bento-grid > * {
    grid-column: 1 / -1;
  }

  .section {
    padding-block: 2.5rem;
  }

  .container {
    width: min(calc(100% - 1.5rem), var(--content-max));
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}