*, *::before, *::after {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
}

:root {
  --space-deep-1000: #091B26;
  --space-deep-900: #0E2334;
  --space-deep-800: #16324A;
  --neon-green-500: #D7FF46;
  --neon-green-300: #E9FF8A;
  --metal-silver-200: #D7E0E8;
  --steel-silver-400: #A1B3C4;
  --slate-500: #708090;
  --signal-amber: #FFC857;
  --white: #FFFFFF;
  --font-heading: 'DIN Alternate', 'Barlow Condensed', 'PingFang SC', sans-serif;
  --font-body: 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-data: 'Roboto Mono', 'SFMono-Regular', monospace;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --content-max: 1440px;
  --gutter: 5vw;
  --header-h: 72px;
}

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

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  font-weight: 400;
  color: var(--metal-silver-200);
  background: var(--space-deep-1000);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

ul, ol {
  list-style: none;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 200ms var(--ease-out);
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--neon-green-500);
  outline-offset: 3px;
  border-radius: 2px;
}

#main-content {
  min-height: 60vh;
}

.container {
  max-width: var(--content-max);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.container--narrow {
  max-width: 920px;
}

.section {
  padding-block: 72px;
}

.divider {
  height: 1px;
  border: 0;
  background: var(--slate-500);
  opacity: 0.3;
  margin: 48px 0;
}

.display-title {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(64px, 10vw, 128px);
  line-height: 0.9;
  text-transform: uppercase;
  letter-spacing: -1px;
  color: var(--metal-silver-200);
  transform: skew(-2deg, 0);
}

.section-header {
  margin-bottom: 40px;
}

.section-title {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(32px, 4.5vw, 56px);
  line-height: 1;
  text-transform: uppercase;
  letter-spacing: -0.5px;
  color: var(--metal-silver-200);
  transform: skew(-2deg, 0);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-data);
  font-size: 14px;
  line-height: 1;
  color: var(--neon-green-500);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.eyebrow::before {
  content: '';
  width: 28px;
  height: 2px;
  background: currentColor;
  flex: none;
}

.lead {
  font-size: 18px;
  line-height: 1.8;
  color: var(--steel-silver-400);
  max-width: 720px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 12px 24px;
  font-family: var(--font-data);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  border: 1px solid transparent;
  transition: background 200ms var(--ease-out), border-color 200ms var(--ease-out), color 200ms var(--ease-out), transform 200ms var(--ease-out);
}

.btn:active {
  transform: translateY(2px);
}

.btn--primary {
  background: var(--neon-green-500);
  border-color: var(--neon-green-500);
  color: var(--space-deep-1000);
}

.btn--primary:hover {
  background: var(--neon-green-300);
  border-color: var(--neon-green-300);
  color: var(--space-deep-1000);
}

.btn--ghost {
  background: transparent;
  border-color: var(--slate-500);
  color: var(--steel-silver-400);
}

.btn--ghost:hover {
  border-color: var(--neon-green-500);
  color: var(--neon-green-500);
}

.data-tag {
  display: inline-block;
  font-family: var(--font-data);
  font-size: 14px;
  line-height: 1;
  color: var(--neon-green-500);
  background: rgba(215, 255, 70, 0.08);
  padding: 6px 10px;
  border-radius: 4px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 2px;
  font-family: var(--font-data);
  letter-spacing: 0.04em;
  line-height: 1.4;
}

.badge--amber {
  background: rgba(255, 200, 87, 0.1);
  color: var(--signal-amber);
  border: 1px solid rgba(255, 200, 87, 0.35);
}

.badge--green {
  background: rgba(215, 255, 70, 0.08);
  color: var(--neon-green-500);
  border: 1px solid rgba(215, 255, 70, 0.25);
}

.badge--gray {
  background: rgba(112, 128, 144, 0.1);
  color: var(--steel-silver-400);
  border: 1px solid rgba(112, 128, 144, 0.3);
}

.card-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.card {
  display: flex;
  flex-direction: column;
  gap: 16px;
  background: var(--space-deep-900);
  border: 1px solid rgba(112, 128, 144, 0.3);
  padding: 24px;
  box-shadow: 0 1px 0 rgba(215, 255, 70, 0.03);
  transition: border-color 200ms var(--ease-out), transform 200ms var(--ease-out);
}

.card:hover {
  border-color: var(--neon-green-500);
  transform: translateY(-2px);
}

.card__title {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 700;
  color: var(--metal-silver-200);
  line-height: 1.2;
}

.card__text {
  font-size: 15px;
  color: var(--steel-silver-400);
  line-height: 1.7;
}

.card__link {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-data);
  font-size: 14px;
  color: var(--neon-green-500);
}

.card__link::after {
  content: '→';
  transition: transform 200ms var(--ease-out);
}

.card__link:hover::after {
  transform: translateX(4px);
}

.prose {
  max-width: 720px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--metal-silver-200);
}

.prose p + p,
.prose ul + p,
.prose p + ul {
  margin-top: 1em;
}

.prose strong {
  color: var(--white);
  font-weight: 600;
}

.prose a {
  color: var(--neon-green-500);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  font-size: 14px;
  color: var(--steel-silver-400);
  margin-bottom: 24px;
}

.breadcrumb a {
  color: var(--steel-silver-400);
}

.breadcrumb a:hover {
  color: var(--neon-green-500);
}

.breadcrumb__sep {
  color: var(--slate-500);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  color: var(--metal-silver-200);
}

.data-table th {
  font-family: var(--font-data);
  font-size: 13px;
  font-weight: 600;
  color: var(--neon-green-500);
  text-align: left;
  padding: 12px;
  border-bottom: 1px solid rgba(215, 255, 70, 0.25);
}

.data-table td {
  padding: 12px;
  border-bottom: 1px solid rgba(112, 128, 144, 0.2);
}

.timeline {
  position: relative;
  padding-left: 32px;
  margin: 24px 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--slate-500);
  opacity: 0.5;
}

.timeline__item {
  position: relative;
  padding-bottom: 24px;
}

.timeline__item::before {
  content: '';
  position: absolute;
  left: -28px;
  top: 6px;
  width: 10px;
  height: 10px;
  background: var(--neon-green-500);
  transform: rotate(45deg);
}

.img-frame {
  position: relative;
  overflow: hidden;
  width: 100%;
  background: var(--space-deep-800);
  border: 1px solid rgba(112, 128, 144, 0.25);
}

.img-frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

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

.img-frame--portrait {
  aspect-ratio: 3 / 4;
}

.img-frame--placeholder::after {
  content: attr(data-label);
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-family: var(--font-data);
  font-size: 14px;
  letter-spacing: 0.3em;
  color: var(--slate-500);
  background: linear-gradient(135deg, rgba(9, 27, 38, 0.4) 0%, rgba(14, 35, 52, 0.9) 100%);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: linear-gradient(to bottom, rgba(9, 27, 38, 0.7), rgba(9, 27, 38, 0));
  border-bottom: 1px solid transparent;
  transition: background 240ms var(--ease-out), border-color 240ms var(--ease-out);
}

.site-header[data-header-scrolled] {
  background: rgba(9, 27, 38, 0.94);
  border-bottom-color: rgba(112, 128, 144, 0.25);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.site-header__progress {
  position: absolute;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: var(--neon-green-500);
  box-shadow: 0 0 10px rgba(215, 255, 70, 0.5);
  z-index: 2;
  pointer-events: none;
  transition: width 80ms linear;
}

.site-header__skip {
  position: fixed;
  top: 8px;
  left: 50%;
  z-index: 300;
  transform: translateX(-50%) translateY(-300%);
  background: var(--neon-green-500);
  color: var(--space-deep-1000);
  font-size: 14px;
  font-weight: 700;
  padding: 10px 18px;
  clip-path: polygon(0 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
  transition: transform 200ms var(--ease-out);
}

.site-header__skip:focus {
  transform: translateX(-50%) translateY(0);
}

.site-header__inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: var(--header-h);
}

.site-header__brand {
  display: flex;
  align-items: center;
  gap: 14px;
  flex: none;
  min-width: 0;
}

.brand-mark {
  position: relative;
  flex: none;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 26px;
  background: var(--space-deep-800);
  border: 1px solid rgba(215, 255, 70, 0.3);
  color: var(--neon-green-500);
}

.brand-mark::before {
  content: '';
  position: absolute;
  left: -1px;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--neon-green-500);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), 0 100%);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-text__name {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 900;
  letter-spacing: 0.02em;
  color: var(--metal-silver-200);
  white-space: nowrap;
}

.brand-text__sub {
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.3em;
  color: var(--neon-green-500);
  white-space: nowrap;
}

.brand-coord {
  position: relative;
  flex: none;
  width: 30px;
  height: 30px;
  margin-left: 2px;
  opacity: 0.5;
}

.brand-coord__x {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--slate-500);
}

.brand-coord__y {
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--slate-500);
}

.site-nav__toggle {
  display: none;
  position: relative;
  width: 48px;
  height: 48px;
  flex: none;
  background: rgba(9, 27, 38, 0.6);
  border: 1px solid rgba(112, 128, 144, 0.4);
}

.site-nav__toggle-line {
  position: absolute;
  left: 14px;
  right: 14px;
  height: 2px;
  background: var(--metal-silver-200);
  transition: top 200ms var(--ease-out), transform 200ms var(--ease-out), opacity 200ms var(--ease-out);
}

.site-nav__toggle-line:nth-child(1) {
  top: 16px;
}

.site-nav__toggle-line:nth-child(2) {
  top: 23px;
}

.site-nav__toggle-line:nth-child(3) {
  top: 30px;
}

.site-nav__toggle[aria-expanded="true"] .site-nav__toggle-line:nth-child(1) {
  top: 23px;
  transform: rotate(45deg);
}

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

.site-nav__toggle[aria-expanded="true"] .site-nav__toggle-line:nth-child(3) {
  top: 23px;
  transform: rotate(-45deg);
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav__link {
  display: block;
  position: relative;
  padding: 10px 14px;
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--metal-silver-200);
  transition: color 200ms var(--ease-out);
}

.site-nav__link::after {
  content: '';
  position: absolute;
  left: 14px;
  right: 100%;
  bottom: 4px;
  height: 2px;
  background: var(--neon-green-500);
  transition: right 200ms var(--ease-out);
}

.site-nav__link:hover {
  color: var(--neon-green-500);
}

.site-nav__link:hover::after {
  right: 14px;
}

.site-nav__link[aria-current="page"] {
  color: var(--neon-green-500);
}

.site-nav__link[aria-current="page"]::after {
  right: 14px;
}

.site-footer {
  position: relative;
  overflow: hidden;
  background: var(--space-deep-1000);
  border-top: 1px solid rgba(112, 128, 144, 0.3);
  padding-top: 64px;
  padding-bottom: 32px;
}

.site-footer::before {
  content: '';
  position: absolute;
  right: -40px;
  bottom: -40px;
  width: 300px;
  height: 300px;
  background:
    linear-gradient(rgba(112, 128, 144, 0.18) 1px, transparent 1px) 0 0 / 24px 24px,
    linear-gradient(90deg, rgba(112, 128, 144, 0.18) 1px, transparent 1px) 0 0 / 24px 24px;
  clip-path: polygon(15% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.site-footer::after {
  content: 'CN-ANBO/VERIFIED';
  position: absolute;
  left: 5vw;
  bottom: 10px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.25em;
  color: var(--slate-500);
  opacity: 0.35;
  pointer-events: none;
}

.site-footer__inner {
  position: relative;
  z-index: 1;
}

.site-footer__head {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 32px;
  align-items: start;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(112, 128, 144, 0.25);
}

.site-footer__brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.site-footer__statement {
  max-width: 640px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--steel-silver-400);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.2fr 0.9fr 0.9fr 1.4fr;
  gap: 32px;
  margin-top: 40px;
}

.site-footer__heading {
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--slate-500);
  margin-bottom: 16px;
}

.site-footer__links {
  display: grid;
  gap: 8px;
}

.site-footer__links a {
  display: inline-block;
  color: var(--steel-silver-400);
  font-size: 14px;
  line-height: 1.6;
  text-decoration: underline;
  text-decoration-color: transparent;
  text-underline-offset: 4px;
  transition: color 180ms var(--ease-out), text-decoration-color 180ms var(--ease-out);
}

.site-footer__links a:hover {
  color: var(--neon-green-500);
  text-decoration-color: var(--neon-green-500);
}

.site-footer__contact-list {
  display: grid;
  gap: 12px;
}

.site-footer__contact-row {
  display: flex;
  gap: 10px;
  font-size: 14px;
  line-height: 1.5;
}

.site-footer__contact-row dt {
  flex: none;
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--neon-green-500);
  padding-top: 2px;
}

.site-footer__contact-row dd {
  margin: 0;
  color: var(--steel-silver-400);
}

.site-footer__meta {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid rgba(112, 128, 144, 0.25);
}

.site-footer__meta-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 32px;
  font-size: 14px;
  color: var(--steel-silver-400);
}

.site-footer__icp {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--steel-silver-400);
}

.site-footer__icp::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--neon-green-500);
  flex: none;
}

.site-footer__copyright {
  font-size: 13px;
}

.site-footer__note {
  max-width: 760px;
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--slate-500);
}

.to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 90;
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  background: var(--space-deep-800);
  border: 1px solid var(--slate-500);
  color: var(--metal-silver-200);
  font-size: 20px;
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity 200ms var(--ease-out), transform 200ms var(--ease-out), border-color 200ms var(--ease-out), box-shadow 200ms var(--ease-out);
}

.to-top:hover {
  border-color: var(--neon-green-500);
  color: var(--neon-green-500);
  box-shadow: 0 0 12px rgba(215, 255, 70, 0.2);
}

.to-top[data-visible] {
  opacity: 1;
  pointer-events: auto;
  transform: none;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 600ms var(--ease-out), transform 600ms var(--ease-out);
}

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

@media (max-width: 1024px) {
  :root {
    --header-h: 64px;
  }

  .site-nav__toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    overflow-y: auto;
    max-height: calc(100vh - var(--header-h));
    background: var(--space-deep-1000);
    border-bottom: 1px solid rgba(112, 128, 144, 0.25);
    padding: 20px 5vw 28px;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateX(24px);
    transition: opacity 220ms var(--ease-out), transform 220ms var(--ease-out), visibility 0s 220ms;
  }

  .site-nav[data-open] {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: none;
    transition: opacity 220ms var(--ease-out), transform 220ms var(--ease-out);
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .site-nav__link {
    padding: 14px 4px;
    font-size: 20px;
    border-bottom: 1px solid rgba(112, 128, 144, 0.15);
  }

  .site-nav__link::after {
    left: 4px;
  }

  .site-nav__link:hover::after,
  .site-nav__link[aria-current="page"]::after {
    right: 4px;
  }
}

@media (max-width: 900px) {
  .site-footer__head {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .site-footer__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px 24px;
  }

  .section {
    padding-block: 56px;
  }
}

@media (max-width: 600px) {
  :root {
    --header-h: 60px;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
    font-size: 20px;
  }

  .brand-text__name {
    font-size: 20px;
  }

  .brand-text__sub {
    font-size: 10px;
  }

  .brand-coord {
    display: none;
  }

  .site-footer {
    padding-top: 48px;
  }

  .site-footer__grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .site-footer__meta-line {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .to-top {
    right: 16px;
    bottom: 16px;
  }
}

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

  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

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