/* ========== 01. Reset & Design Tokens ========== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  color-scheme: dark;
  scroll-behavior: smooth;
}

:root {
  --color-bg: #0A1428;
  --color-bg-alt: #1E232B;
  --color-bg-deep: #080A10;
  --color-surface: rgba(255, 255, 255, 0.03);
  --color-highlight: #00FF88;
  --color-electric: #00BFFF;
  --color-gold: #FFD700;
  --color-burgundy: #800020;
  --color-purple: #4B0082;
  --color-text: #E6E6E6;
  --color-text-dim: #A0A0A0;
  --color-border: #2A3450;

  --font-head: "Oswald", "Arial Narrow", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-data: "JetBrains Mono", "SF Mono", "Roboto Mono", Consolas, monospace;
  --font-serif: "Noto Serif SC", "Songti SC", serif;

  --container: 1280px;
  --radius: 4px;
  --ease: 180ms ease;
  --shadow-card: 0 10px 28px rgba(0, 0, 0, 0.35);
}

/* ========== 02. Base ========== */
body {
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background:
    radial-gradient(1100px 480px at 85% -10%, rgba(0, 191, 255, 0.10), transparent 60%),
    linear-gradient(180deg, rgba(75, 0, 130, 0.06), transparent 40%),
    var(--color-bg);
  -webkit-font-smoothing: antialiased;
  scrollbar-color: var(--color-border) var(--color-bg-deep);
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 1.15;
}

h1 {
  font-size: clamp(2.2rem, 5vw, 4rem);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.8rem);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

h3 {
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

p { margin-bottom: 1em; }

ul, ol { list-style: none; }

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

button {
  font: inherit;
  border: 0;
  background: none;
  cursor: pointer;
}

a {
  color: var(--color-electric);
  text-decoration: none;
  transition: color var(--ease);
}

a:hover { color: var(--color-highlight); }

::selection {
  background: rgba(0, 255, 136, 0.85);
  color: var(--color-bg-deep);
}

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

#main-content {
  scroll-margin-top: 104px;
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
::-webkit-scrollbar-track { background: var(--color-bg-deep); }
::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 5px;
}
::-webkit-scrollbar-thumb:hover { background: var(--color-electric); }

/* ========== 03. Utilities ========== */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-5, 24px);
}

.grid-2, .grid-3, .grid-4 {
  display: grid;
  gap: var(--space-5, 24px);
}
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.divider-slant {
  width: 100%;
  height: 2px;
  margin: var(--space-7, 48px) 0;
  border: 0;
  background: linear-gradient(
    90deg,
    var(--color-highlight) 0%,
    var(--color-electric) 18%,
    var(--color-border) 18%,
    var(--color-border) 82%,
    var(--color-burgundy) 82%,
    var(--color-purple) 100%
  );
  transform: skewX(-12deg);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  border: 0;
  white-space: nowrap;
}

.data-text {
  font-family: var(--font-data);
  letter-spacing: 0.03em;
}

/* ========== 04. Skip Link & Progress ========== */
.skip-link {
  position: fixed;
  top: -64px;
  left: 16px;
  z-index: 2000;
  padding: 10px 18px;
  background: var(--color-highlight);
  color: var(--color-bg-deep);
  font-weight: 700;
  border-radius: var(--radius);
  transition: top 180ms ease;
}
.skip-link:focus { top: 12px; }

.progress-rail {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1500;
  width: 100%;
  height: 3px;
  background: rgba(0, 0, 0, 0.35);
  pointer-events: none;
}
.progress-rail__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--color-highlight), var(--color-electric));
  box-shadow: 0 0 10px rgba(0, 255, 136, 0.5);
}

/* ========== 05. Header ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
}

.site-header__ticker {
  background: var(--color-bg-deep);
  border-bottom: 1px solid var(--color-border);
}
.site-header__ticker-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4, 16px);
  min-height: 30px;
}
.site-header__status {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-data);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-highlight);
}
.site-header__update {
  font-family: var(--font-data);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--color-text-dim);
}

.dot-pulse {
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 8px;
  border-radius: 50%;
  background: var(--color-highlight);
  box-shadow: 0 0 6px var(--color-highlight);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.site-header__main {
  position: relative;
  background: rgba(10, 20, 40, 0.94);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}
.site-header__main::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(0, 191, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 191, 255, 0.045) 1px, transparent 1px);
  background-size: 20px 20px;
  pointer-events: none;
}
.site-header__main::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 160px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-highlight), var(--color-electric));
  transform: skewX(-18deg);
  transform-origin: left center;
}
.site-header__row {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-5, 24px);
  min-height: 72px;
}

/* Brand */
.site-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3, 12px);
  flex-shrink: 0;
  color: var(--color-text);
}
.site-brand:hover { color: var(--color-text); }
.site-brand__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  background:
    linear-gradient(135deg, rgba(128, 0, 32, 0.55), rgba(10, 20, 40, 0.9)),
    repeating-linear-gradient(-45deg, rgba(0, 191, 255, 0.10) 0 1px, transparent 1px 8px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}
.site-brand__text {
  display: block;
  line-height: 1;
}
.site-brand__name {
  display: block;
  font-family: var(--font-head);
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text);
}
.site-brand__tag {
  display: block;
  margin-top: 5px;
  font-family: var(--font-data);
  font-size: 0.62rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-electric);
}

/* Navigation */
.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  margin-left: auto;
  flex-shrink: 0;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}
.nav-toggle__line {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-text);
  transition: transform 200ms ease, opacity 200ms ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.site-nav {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  max-height: 0;
  overflow: hidden;
  background: rgba(8, 10, 16, 0.97);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.45);
  transition: max-height 240ms ease;
}
.site-nav[data-open="true"] {
  max-height: 480px;
}
.site-nav__list {
  display: flex;
  flex-direction: column;
  gap: 0;
  padding: var(--space-2, 8px);
}
.site-nav__item {
  border-bottom: 1px solid var(--color-border);
}
.site-nav__item:last-child {
  border-bottom: 0;
}
.site-nav__link {
  display: block;
  padding: 14px 16px;
  font-family: var(--font-head);
  font-size: 0.96rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-dim);
  border-left: 3px solid transparent;
  transition: color var(--ease), background var(--ease), border-color var(--ease);
}
.site-nav__link:hover {
  color: var(--color-text);
  background: var(--color-surface);
  border-left-color: var(--color-highlight);
}
.site-nav__link[aria-current="page"] {
  color: var(--color-highlight);
  background: rgba(0, 255, 136, 0.06);
  border-left-color: var(--color-highlight);
}

/* Desktop Navigation */
@media (min-width: 861px) {
  .nav-toggle { display: none; }
  .site-nav {
    position: static;
    display: flex;
    margin-left: auto;
    max-height: none;
    overflow: visible;
    background: transparent;
    border-bottom: 0;
    box-shadow: none;
  }
  .site-nav__list {
    flex-direction: row;
    align-items: center;
    gap: var(--space-1, 4px);
    padding: 0;
  }
  .site-nav__item {
    border-bottom: 0;
  }
  .site-nav__link {
    position: relative;
    display: inline-block;
    padding: 10px 12px;
    font-size: 0.85rem;
    border-left: 2px solid transparent;
  }
  .site-nav__link::after {
    content: "";
    position: absolute;
    left: 12px;
    bottom: 5px;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-highlight), var(--color-electric));
    transition: width var(--ease);
  }
  .site-nav__link:hover {
    border-left-color: var(--color-highlight);
  }
  .site-nav__link:hover::after,
  .site-nav__link[aria-current="page"]::after {
    width: calc(100% - 24px);
  }
  .site-nav__link[aria-current="page"] {
    background: rgba(0, 255, 136, 0.05);
  }
}

/* Header CTA */
.site-header__cta {
  flex-shrink: 0;
}

/* ========== 06. Buttons & Badges ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  font-family: var(--font-head);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 160ms ease, color 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}
.btn-primary {
  background: var(--color-highlight);
  border-color: var(--color-highlight);
  color: var(--color-bg-deep);
}
.btn-primary:hover {
  background: transparent;
  color: var(--color-highlight);
  box-shadow: inset 0 0 0 1px var(--color-highlight);
}
.btn-ghost {
  background: transparent;
  border-color: var(--color-electric);
  color: var(--color-electric);
}
.btn-ghost:hover {
  background: var(--color-electric);
  color: var(--color-bg-deep);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 2px;
  font-family: var(--font-head);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: rgba(0, 255, 136, 0.10);
  color: var(--color-highlight);
  border: 1px solid rgba(0, 255, 136, 0.28);
}
.badge-gold {
  background: rgba(255, 215, 0, 0.12);
  color: var(--color-gold);
  border-color: rgba(255, 215, 0, 0.35);
}

/* ========== 07. Page Components ========== */
.section-header {
  margin-bottom: var(--space-6, 32px);
}
.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: var(--space-2, 8px);
  font-family: var(--font-data);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-electric);
}
.section-kicker::before {
  content: "//";
  color: var(--color-highlight);
  font-weight: 700;
}
.section-subtitle {
  margin-top: var(--space-2, 8px);
  max-width: 640px;
  color: var(--color-text-dim);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  padding-block: 14px;
  font-family: var(--font-data);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: var(--color-text-dim);
}
.breadcrumb li + li::before {
  content: "/";
  margin-right: 6px;
  color: var(--color-border);
}
.breadcrumb a {
  color: var(--color-electric);
}
.breadcrumb a:hover {
  color: var(--color-highlight);
}
.breadcrumb [aria-current] {
  color: var(--color-highlight);
}

.card {
  position: relative;
  padding: var(--space-5, 24px);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  transition: transform var(--ease), border-color var(--ease), box-shadow var(--ease);
}
.card:hover {
  transform: translateY(-3px);
  border-color: var(--color-electric);
  box-shadow: var(--shadow-card);
}
.card--data {
  background:
    linear-gradient(135deg, rgba(0, 255, 136, 0.05), transparent 40%),
    var(--color-bg-alt);
  border-left: 3px solid var(--color-highlight);
}
.card--gold {
  border-top: 2px solid var(--color-gold);
  border-color: rgba(255, 215, 0, 0.35);
}

.img-frame {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 220px;
  overflow: hidden;
  background:
    repeating-linear-gradient(-45deg, rgba(0, 191, 255, 0.10) 0 1px, transparent 1px 12px),
    linear-gradient(135deg, rgba(128, 0, 32, 0.30), rgba(10, 20, 40, 0.85)),
    var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 6px;
}
.img-frame--16-9 {
  aspect-ratio: 16 / 9;
  min-height: 0;
}
.img-frame--4-3 {
  aspect-ratio: 4 / 3;
  min-height: 0;
}
.img-frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.img-frame__label {
  padding: 8px 14px;
  font-family: var(--font-data);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text-dim);
  border: 1px dashed var(--color-border);
  background: rgba(0, 0, 0, 0.30);
}

/* ========== 08. Reveal ========== */
.js-enabled [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 440ms ease, transform 440ms ease;
}
.js-enabled [data-reveal][data-visible="true"] {
  opacity: 1;
  transform: translateY(0);
}

/* ========== 09. Footer ========== */
.site-footer {
  background: var(--color-bg-alt);
}

.site-footer__strip {
  background: linear-gradient(100deg, var(--color-burgundy) 0%, var(--color-purple) 52%, var(--color-bg-alt) 100%);
  padding-block: var(--space-3, 12px);
}
.site-footer__trust {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  line-height: 1.6;
  color: rgba(230, 230, 230, 0.92);
  text-align: center;
}
.site-footer__flag {
  display: inline-block;
  width: 0;
  height: 0;
  margin-right: 10px;
  border-left: 7px solid var(--color-gold);
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
}

.site-footer__main {
  padding-block: var(--space-8, 64px);
  background:
    repeating-linear-gradient(0deg, transparent 0 23px, rgba(0, 191, 255, 0.025) 23px 24px),
    radial-gradient(800px 360px at 85% -20%, rgba(75, 0, 130, 0.24), transparent 60%),
    var(--color-bg-alt);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr 1fr;
  gap: var(--space-7, 48px);
  counter-reset: footer-col;
}

.site-footer__heading {
  position: relative;
  padding-bottom: 10px;
  margin-bottom: var(--space-4, 16px);
  border-bottom: 1px solid var(--color-border);
  font-family: var(--font-head);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-gold);
}
.site-footer__heading::before {
  content: "0" counter(footer-col) " · ";
  counter-increment: footer-col;
  font-family: var(--font-data);
  font-size: 0.72rem;
  color: var(--color-highlight);
  letter-spacing: 0.08em;
}

.site-footer__brand .site-brand {
  margin-bottom: var(--space-4, 16px);
}
.site-brand--footer .site-brand__name {
  font-size: 1.25rem;
}
.site-footer__desc {
  max-width: 300px;
  margin-bottom: var(--space-4, 16px);
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--color-text-dim);
}
.site-footer__support {
  align-self: flex-start;
}

.site-footer__nav ul,
.site-footer__support-block ul {
  display: grid;
  gap: 10px;
}
.site-footer__nav a,
.site-footer__support-block a {
  font-size: 0.88rem;
  color: var(--color-text-dim);
  transition: color 160ms ease;
}
.site-footer__nav a:hover,
.site-footer__support-block a:hover {
  color: var(--color-highlight);
}

.site-footer__address {
  display: grid;
  gap: 8px;
  margin-top: var(--space-4, 16px);
  font-style: normal;
  font-size: 0.86rem;
  line-height: 1.6;
  color: var(--color-text-dim);
}
.site-footer__note {
  margin: var(--space-4, 16px) 0 0;
  padding-left: 10px;
  border-left: 2px solid var(--color-electric);
  font-size: 0.76rem;
  line-height: 1.6;
  color: var(--color-text-dim);
}

.live-metrics {
  display: grid;
  gap: 10px;
}
.live-metric {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3, 12px);
  padding: 10px 12px;
  background: rgba(0, 0, 0, 0.25);
  border-left: 2px solid var(--color-highlight);
  border-radius: 2px;
}
.live-metric__label {
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--color-text-dim);
}
.live-metric__value {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-highlight);
}

.site-footer__bottom {
  background: var(--color-bg-deep);
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-4, 16px);
}
.site-footer__bottom-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4, 16px);
  flex-wrap: wrap;
}
.site-footer__copyright,
.site-footer__icp {
  margin: 0;
  font-size: 0.78rem;
  color: var(--color-text-dim);
}
.site-footer__icp {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-data);
  letter-spacing: 0.06em;
}
.site-footer__icp .dot-pulse {
  width: 6px;
  height: 6px;
  margin-right: 6px;
}

/* ========== 10. Responsive ========== */
@media (max-width: 1100px) {
  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6, 32px);
  }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 860px) {
  .site-header__ticker-row {
    justify-content: center;
  }
  .site-header__update {
    display: none;
  }
  .site-header__cta {
    display: none;
  }
}

@media (max-width: 680px) {
  .container {
    padding-inline: var(--space-4, 16px);
  }
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  .site-footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-6, 32px);
  }
  .site-brand__name {
    font-size: 1.1rem;
  }
  .site-brand__tag {
    font-size: 0.55rem;
    letter-spacing: 0.16em;
  }
  .site-footer__bottom-row {
    flex-direction: column;
    text-align: center;
    justify-content: center;
  }
  .img-frame {
    min-height: 160px;
  }
}

/* ========== 11. Reduced Motion ========== */
@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;
  }
  .dot-pulse {
    animation: none;
  }
  .card:hover {
    transform: none;
    box-shadow: none;
  }
  .js-enabled [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}