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

:root {
  --color-bg-start: #1A1A1A;
  --color-bg-end: #2D2D2D;
  --color-primary: #0A192F;
  --color-accent: #39FF14;
  --color-warning: #FF6B35;
  --color-text: #E0E0E0;
  --color-text-secondary: #A0A0A0;
  --color-paper: #F5E9D0;
  --color-border: rgba(224, 224, 224, 0.14);
  --color-accent-dim: rgba(57, 255, 20, 0.14);
  --font-headline: "Bebas Neue", "Arial Narrow", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Inter", "PingFang SC", "Microsoft YaHei", -apple-system, sans-serif;
  --font-data: "Roboto Mono", "SFMono-Regular", "PingFang SC", monospace;
  --text-xs: 12px;
  --text-sm: 14px;
  --text-base: 16px;
  --text-lg: 18px;
  --text-xl: 24px;
  --text-2xl: 32px;
  --text-3xl: 48px;
  --text-4xl: 72px;
  --text-5xl: 96px;
  --container-width: 1180px;
  --header-z: 90;
  --overlay-z: 110;
  --gutter: 24px;
  --radius: 4px;
  --shadow: 0 6px 28px rgba(0, 0, 0, 0.22);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg-start);
  background-image:
    radial-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(180deg, var(--color-bg-start) 0%, var(--color-bg-end) 100%);
  background-size: 24px 24px, 100% 100%;
  background-attachment: fixed;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: var(--color-accent);
  color: #141414;
}

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

#main-content {
  scroll-margin-top: 24px;
}

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

a {
  color: var(--color-accent);
}

button {
  font-family: inherit;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.section {
  padding: 64px 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}

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

.skip-link {
  position: absolute;
  left: 12px;
  top: -120px;
  z-index: 200;
  padding: 12px 20px;
  background: var(--color-accent);
  color: #141414;
  font-weight: 600;
  font-size: var(--text-sm);
  text-decoration: none;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 12px;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--color-accent), #8dffa0);
  z-index: var(--overlay-z);
  box-shadow: 0 0 8px rgba(57, 255, 20, 0.4);
  pointer-events: none;
}

.site-header {
  position: relative;
  z-index: var(--header-z);
  background: var(--color-primary);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
}

.site-header::before {
  content: '';
  display: block;
  height: 2px;
  background: linear-gradient(90deg, transparent 0%, var(--color-accent) 50%, transparent 100%);
  opacity: 0.6;
}

.site-header::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
}

.masthead {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: 36px;
  padding-bottom: 28px;
}

.masthead__badge {
  position: absolute;
  top: 24px;
  right: 24px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-data);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 6px 14px 6px 10px;
  background: rgba(0, 0, 0, 0.15);
}

.masthead__badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 8px var(--color-accent), 0 0 2px var(--color-accent);
  animation: pulse-dot 2.4s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.45;
    transform: scale(0.8);
  }
}

.masthead__brand {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  text-decoration: none;
  color: var(--color-text);
  transition: opacity 0.2s ease;
}

.masthead__brand:hover {
  opacity: 0.88;
}

.masthead__brand-name {
  font-family: var(--font-headline);
  font-size: var(--text-4xl);
  font-weight: 700;
  line-height: 0.92;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text);
  transition: color 0.2s ease;
}

.masthead__brand:hover .masthead__brand-name {
  color: var(--color-accent);
}

.masthead__wordmark {
  margin-top: 8px;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.42em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  padding-left: 0.42em;
}

.site-nav {
  border-top: 1px solid var(--color-border);
  background: rgba(5, 15, 32, 0.6);
}

.site-nav__inner {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  min-height: 54px;
  gap: 8px;
  flex-wrap: wrap;
}

.site-nav__list {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.site-nav__item {
  margin: 0;
}

.site-nav__link {
  display: inline-flex;
  align-items: center;
  position: relative;
  padding: 14px 18px;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--color-text);
  text-decoration: none;
  transition: color 0.2s ease;
}

.site-nav__link::after {
  content: '';
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 10px;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.22s ease;
}

.site-nav__link:hover,
.site-nav__link:focus-visible {
  color: var(--color-accent);
}

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

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

.site-nav__toggle {
  display: none;
}

.site-footer {
  position: relative;
  margin-top: 80px;
  background: var(--color-primary);
  border-top: 1px solid var(--color-border);
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-accent) 50%, transparent);
  opacity: 0.45;
}

.site-footer__inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr 0.8fr;
  gap: 48px;
  padding-top: 56px;
  padding-bottom: 44px;
}

.site-footer__brand-name {
  display: block;
  font-family: var(--font-headline);
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: 0.14em;
  line-height: 1.1;
  color: var(--color-text);
}

.site-footer__wordmark {
  display: block;
  margin-top: 4px;
  font-size: var(--text-xs);
  letter-spacing: 0.28em;
  color: var(--color-accent);
}

.site-footer__about {
  margin-top: 16px;
  max-width: 30ch;
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.site-footer__heading {
  font-family: var(--font-headline);
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: 0.1em;
  margin-bottom: 18px;
  color: var(--color-text);
}

.site-footer__phone,
.site-footer__email,
.site-footer__address {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.65;
}

.site-footer__email {
  font-family: var(--font-data);
}

.site-footer__address {
  margin-top: 10px;
  max-width: 40ch;
}

.site-footer__contact-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.site-footer__contact-link::after {
  content: '→';
  transition: transform 0.2s ease;
}

.site-footer__contact-link:hover {
  border-color: var(--color-accent);
}

.site-footer__contact-link:hover::after {
  transform: translateX(4px);
}

.site-footer__policy-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.site-footer__policy-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 0;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color 0.2s ease;
}

.site-footer__policy-link::before {
  content: '›';
  font-family: var(--font-data);
  color: var(--color-accent);
  font-size: 16px;
  line-height: 1;
}

.site-footer__policy-link:hover {
  color: var(--color-accent);
}

.site-footer__bottom {
  border-top: 1px solid var(--color-border);
  background: rgba(0, 0, 0, 0.22);
}

.site-footer__bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 20px;
  padding-bottom: 20px;
}

.site-footer__trust {
  font-size: var(--text-xs);
  line-height: 1.7;
  max-width: 62ch;
  color: var(--color-text-secondary);
}

.site-footer__icp {
  font-family: var(--font-data);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  white-space: nowrap;
}

.to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: var(--header-z);
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  line-height: 1;
  color: var(--color-accent);
  background: var(--color-primary);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  cursor: pointer;
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
  box-shadow: var(--shadow);
}

.to-top.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.to-top:hover {
  border-color: var(--color-accent);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1;
  color: var(--color-text);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.btn--primary {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #141414;
}

.btn--primary:hover {
  background: #A5FF8A;
  border-color: #A5FF8A;
  box-shadow: 0 0 28px rgba(57, 255, 20, 0.2);
}

.btn--ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: var(--color-accent-dim);
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-data);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.section-title {
  font-family: var(--font-headline);
  font-size: clamp(36px, 6vw, 56px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: 0.03em;
  color: var(--color-text);
  margin: 8px 0 16px;
}

.data-text {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-data);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  padding: 4px 10px;
  border: 1px solid var(--color-border);
  border-radius: 2px;
  color: var(--color-text-secondary);
  line-height: 1.4;
}

.tag--live {
  border-color: rgba(57, 255, 20, 0.4);
  color: var(--color-accent);
}

.tag--alert {
  border-color: rgba(255, 107, 53, 0.45);
  color: var(--color-warning);
}

.card {
  position: relative;
  background: var(--color-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px 26px 26px;
  box-shadow: var(--shadow);
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 44px;
  background: var(--color-accent);
  opacity: 0.75;
}

.card__title {
  font-family: var(--font-headline);
  font-size: 26px;
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: 0.04em;
  color: var(--color-text);
  margin-bottom: 8px;
}

.card__meta {
  font-family: var(--font-data);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-text-secondary);
}

.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  list-style: none;
  gap: 4px;
  padding: 16px 0;
}

.breadcrumbs__item {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.breadcrumbs__item + .breadcrumbs__item::before {
  content: '/';
  color: var(--color-text-secondary);
  margin: 0 4px;
}

.breadcrumbs__link {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color 0.2s ease;
}

.breadcrumbs__link:hover {
  color: var(--color-accent);
}

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

.prose {
  color: var(--color-text);
  font-size: var(--text-base);
  line-height: 1.75;
}

.prose h2 {
  font-family: var(--font-headline);
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-text);
  margin: 48px 0 16px;
}

.prose h3 {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  margin: 32px 0 12px;
}

.prose p {
  margin-bottom: 18px;
}

.prose a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: rgba(57, 255, 20, 0.5);
}

.prose a:hover {
  text-decoration-color: var(--color-accent);
}

.prose ul,
.prose ol {
  margin: 0 0 18px 20px;
}

.prose li {
  margin-bottom: 6px;
}

.prose blockquote {
  margin: 40px 0;
  padding: 28px 28px 24px;
  background: var(--color-paper);
  color: #1A1A1A;
  border-radius: var(--radius);
  border-left: 4px solid var(--color-warning);
}

.prose blockquote p {
  margin-bottom: 0;
  font-weight: 500;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-data);
  font-size: var(--text-sm);
  margin: 32px 0;
}

.prose th {
  text-align: left;
  color: var(--color-accent);
  font-weight: 500;
  padding: 10px 12px;
  border-bottom: 1px solid rgba(57, 255, 20, 0.35);
}

.prose td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
}

.prose hr {
  border: none;
  height: 1px;
  background: var(--color-border);
  margin: 40px 0;
}

.divider {
  height: 1px;
  border: none;
  background: linear-gradient(90deg, transparent, var(--color-border) 20%, var(--color-border) 80%, transparent);
  margin: 32px 0;
}

.data-flow {
  height: 4px;
  border-radius: 2px;
  background-image: repeating-linear-gradient(90deg, var(--color-accent) 0 6px, transparent 6px 22px);
  opacity: 0.5;
}

.img-frame {
  position: relative;
  overflow: hidden;
  background: var(--color-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.img-frame::before {
  content: '';
  display: block;
}

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

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

.img-frame--portrait::before {
  padding-top: 125%;
}

.img-frame img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.img-frame--data::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(57, 255, 20, 0.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(57, 255, 20, 0.1) 1px, transparent 1px);
  background-size: 20px 20px;
  pointer-events: none;
}

.js [data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.js [data-reveal].is-revealed {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 960px) {
  .site-footer__inner {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

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

@media (max-width: 768px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .masthead {
    padding-top: 24px;
    padding-bottom: 20px;
  }

  .masthead__badge {
    position: static;
    margin-bottom: 12px;
  }

  .masthead__brand-name {
    font-size: var(--text-3xl);
  }

  .site-nav {
    background: var(--color-primary);
  }

  .site-nav__inner {
    justify-content: flex-end;
    min-height: 52px;
    padding-top: 4px;
    padding-bottom: 4px;
  }

  .site-nav__toggle {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    cursor: pointer;
    transition: border-color 0.2s ease;
  }

  .site-nav__toggle:hover {
    border-color: var(--color-accent);
  }

  .site-nav__toggle-bar {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--color-text);
    margin: 2px 0;
    transition: transform 0.2s ease, opacity 0.2s ease, background-color 0.2s ease;
  }

  .site-nav__toggle-bar:nth-child(1) {
    margin-top: 0;
  }

  .site-nav__toggle-bar:nth-child(3) {
    margin-bottom: 0;
  }

  .site-nav[data-open] .site-nav__toggle-bar:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
    background: var(--color-accent);
  }

  .site-nav[data-open] .site-nav__toggle-bar:nth-child(2) {
    opacity: 0;
  }

  .site-nav[data-open] .site-nav__toggle-bar:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
    background: var(--color-accent);
  }

  .site-nav__list {
    flex-basis: 100%;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 4px 0 12px;
  }

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

  .site-nav__link {
    display: flex;
    width: 100%;
    padding: 14px 8px;
    font-size: var(--text-base);
    border-bottom: 1px solid var(--color-border);
  }

  .site-nav__item:last-child .site-nav__link {
    border-bottom: none;
  }

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

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

  .site-footer__inner {
    grid-template-columns: 1fr;
    padding-top: 40px;
    padding-bottom: 32px;
  }

  .site-footer__bottom-inner {
    flex-direction: column;
    align-items: flex-start;
  }

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

  .grid {
    gap: 16px;
  }
}

@media (orientation: landscape) and (max-height: 480px) {
  .masthead {
    padding-top: 16px;
    padding-bottom: 14px;
  }

  .masthead__brand-name {
    font-size: var(--text-3xl);
  }

  .masthead__wordmark {
    margin-top: 4px;
  }
}

@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;
  }

  .masthead__badge-dot {
    animation: none;
  }

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

  .to-top {
    transition: none;
  }
}