:root {
  --color-bg: #0A1E32;
  --color-bg-2: #12385B;
  --color-glass: rgba(255, 255, 255, 0.08);
  --color-acid: #00FFA3;
  --color-orange: #FF5A36;
  --color-pulse: #3D7BFF;
  --color-text: #F0F6FC;
  --color-dim: #B0C5D9;
  --color-line: #235789;
  --color-dark: #070F17;
  --color-cream: #FAF7F2;
  --font-head: "Barlow Condensed", "Arial Narrow", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", "Consolas", monospace;
  --container-width: 1440px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --radius-pill: 999px;
  --shadow-panel: 0 8px 32px rgba(0, 0, 0, 0.35);
  --shadow-float: 0 12px 40px rgba(0, 0, 0, 0.45);
  --header-top: 16px;
  --transition-fast: 0.2s ease;
  --transition-med: 0.3s ease;
}

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

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

body {
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image:
    radial-gradient(circle at 80% 0%, rgba(61, 123, 255, 0.12) 0%, transparent 40%),
    radial-gradient(circle at 10% 100%, rgba(0, 255, 163, 0.05) 0%, transparent 30%),
    linear-gradient(rgba(35, 87, 137, 0.35) 1px, transparent 1px),
    linear-gradient(90deg, rgba(35, 87, 137, 0.35) 1px, transparent 1px);
  background-size: auto, auto, 64px 64px, 64px 64px;
  min-height: 100vh;
  overflow-x: hidden;
}

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

a {
  color: var(--color-acid);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

button {
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--color-text);
  background: none;
  border: none;
  cursor: pointer;
}

ul,
ol {
  list-style: none;
}

:focus-visible {
  outline: 2px solid var(--color-acid);
  outline-offset: 3px;
  border-radius: 4px;
}

main,
.main-content {
  position: relative;
  z-index: 1;
}

.skip-link {
  position: fixed;
  top: -56px;
  left: 16px;
  z-index: 2000;
  background: var(--color-acid);
  color: var(--color-dark);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 14px;
  line-height: 1;
  padding: 12px 18px;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  box-shadow: 0 4px 20px rgba(0, 255, 163, 0.3);
  transition: top var(--transition-med);
}

.skip-link:focus {
  top: 0;
}

/* ===== Header ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  pointer-events: none;
}

.site-header__progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 4px;
  width: 0%;
  z-index: 1003;
  background: linear-gradient(90deg, var(--color-acid), var(--color-pulse) 60%, var(--color-orange));
  box-shadow: 0 0 12px rgba(0, 255, 163, 0.45);
  pointer-events: none;
  border-radius: 0 2px 2px 0;
}

.site-header__inner {
  pointer-events: auto;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: var(--header-top) 24px 0;
}

.site-header__float {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: rgba(10, 30, 50, 0.72);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  backdrop-filter: blur(20px) saturate(140%);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  padding: 7px 8px 7px 20px;
  box-shadow: var(--shadow-float);
  transition: padding var(--transition-med), background var(--transition-med), box-shadow var(--transition-med);
}

.site-header.is-scrolled .site-header__float {
  padding: 4px 6px 4px 14px;
  background: rgba(10, 30, 50, 0.92);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.55);
}

.site-header__float::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 18px;
  bottom: 18px;
  width: 3px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--color-acid), var(--color-pulse));
  opacity: 0.75;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text);
  font-family: var(--font-head);
  font-weight: 700;
  font-style: italic;
  font-size: 22px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  white-space: nowrap;
  transition: opacity var(--transition-fast);
}

.site-brand:hover {
  color: var(--color-text);
  opacity: 0.9;
}

.site-brand__mark {
  position: relative;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 7px;
  background: var(--color-acid);
  transform: rotate(45deg);
  transition: transform var(--transition-med);
  flex-shrink: 0;
}

.site-brand:hover .site-brand__mark {
  transform: rotate(45deg) scale(1.08);
}

.site-brand__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-dark);
  box-shadow: 0 0 0 4px rgba(0, 255, 163, 0.3);
}

.site-brand__text {
  line-height: 1;
}

.site-nav__toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--color-glass);
  border: 1px solid var(--color-line);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

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

.site-nav__toggle-bar {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--color-text);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.site-nav__toggle[aria-expanded="true"] .site-nav__toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.site-nav__toggle[aria-expanded="true"] .site-nav__toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

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

.site-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-dim);
  transition: background var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
}

.site-nav__link:hover {
  color: var(--color-text);
  background: var(--color-glass);
}

.site-nav__link[aria-current="page"] {
  background: var(--color-acid);
  color: var(--color-dark);
  font-weight: 600;
  box-shadow: 0 2px 12px rgba(0, 255, 163, 0.3);
}

.site-nav__link[aria-current="page"] .site-nav__index {
  color: var(--color-dark);
  opacity: 0.65;
}

.site-nav__index {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.5px;
  color: var(--color-acid);
  line-height: 1;
}

.site-nav__link[aria-current="page"] .site-nav__index {
  color: rgba(7, 15, 23, 0.6);
}

/* ===== Footer ===== */
.site-footer {
  position: relative;
  margin-top: 80px;
  background: linear-gradient(180deg, var(--color-bg-2) 0%, var(--color-bg) 100%);
  border-top: 1px solid var(--color-line);
  padding: 64px 0 28px;
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-acid), var(--color-pulse) 55%, var(--color-orange));
}

.site-footer::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-line) 1px, transparent 1px);
  background-size: 56px 56px;
  opacity: 0.05;
  pointer-events: none;
}

.site-footer__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 40px;
}

.site-footer__brand-col .site-brand {
  font-size: 24px;
}

.site-footer__note {
  margin-top: 14px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-dim);
  max-width: 46ch;
}

.site-footer__heading {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-acid);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-line);
}

.site-footer__links,
.site-footer__meta {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.site-footer__links a {
  position: relative;
  display: inline-block;
  font-size: 14px;
  color: var(--color-dim);
  padding-left: 0;
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}

.site-footer__links a:hover {
  color: var(--color-acid);
  padding-left: 4px;
}

.site-footer__meta {
  font-size: 14px;
  color: var(--color-dim);
}

.site-footer__meta li {
  position: relative;
  padding-left: 16px;
}

.site-footer__meta li::before {
  content: "›";
  position: absolute;
  left: 0;
  top: -1px;
  color: var(--color-acid);
  font-family: var(--font-mono);
  font-size: 16px;
}

.site-footer__bottom {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--color-line);
  margin-top: 48px;
  padding-top: 20px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  font-size: 13px;
  color: var(--color-dim);
}

/* ===== Layout Helpers ===== */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
  padding: 11px 22px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  text-decoration: none;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), transform 0.15s ease, box-shadow var(--transition-fast);
}

.btn:active {
  transform: scale(0.97);
}

.btn--primary {
  background: var(--color-acid);
  color: var(--color-dark);
  box-shadow: 0 2px 14px rgba(0, 255, 163, 0.25);
}

.btn--primary:hover {
  background: #59ffc0;
  color: var(--color-dark);
  box-shadow: 0 4px 20px rgba(0, 255, 163, 0.35);
}

.btn--ghost {
  background: var(--color-glass);
  color: var(--color-text);
  border-color: var(--color-line);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.btn--ghost:hover {
  border-color: var(--color-acid);
  color: var(--color-acid);
  background: rgba(0, 255, 163, 0.06);
}

/* ===== Breadcrumbs ===== */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-dim);
  margin-bottom: 24px;
}

.breadcrumbs a {
  color: var(--color-dim);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

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

.breadcrumbs .separator {
  color: var(--color-line);
  font-size: 14px;
}

/* ===== Section Label / Title ===== */
.section-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-acid);
  margin-bottom: 8px;
}

.section-title {
  font-family: var(--font-head);
  font-style: italic;
  font-weight: 700;
  font-size: clamp(36px, 6vw, 72px);
  line-height: 0.95;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-text);
  margin: 0 0 16px;
}

/* ===== Panels ===== */
.panel {
  background: var(--color-glass);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-panel);
}

.panel--solid {
  background: var(--color-bg-2);
  backdrop-filter: none;
}

.panel--cream {
  background: var(--color-cream);
  color: var(--color-dark);
  border: none;
  backdrop-filter: none;
}

.panel--cream .section-title,
.panel--cream h1,
.panel--cream h2,
.panel--cream h3 {
  color: var(--color-dark);
}

/* ===== Card ===== */
.card {
  background: var(--color-glass);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  transition: border-color var(--transition-fast), transform var(--transition-fast), background var(--transition-fast);
}

.card:hover {
  border-color: var(--color-acid);
  transform: translateY(-3px);
}

/* ===== Grids ===== */
.grid {
  display: grid;
  gap: 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);
}

/* ===== Stats ===== */
.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 18px;
  background: var(--color-glass);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
}

.stat__label {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--color-dim);
}

.stat__value {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 500;
  color: var(--color-acid);
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}

/* ===== Media Frame ===== */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  background: var(--color-bg-2);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 16 / 10;
  box-shadow: var(--shadow-panel);
}

.media-frame img,
.media-frame video,
.media-frame .media-placeholder {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.media-frame::after {
  content: attr(data-overlay);
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 1px;
  color: var(--color-acid);
  background: linear-gradient(to top, rgba(10, 30, 50, 0.85) 0%, rgba(10, 30, 50, 0.2) 70%, transparent 100%);
}

/* ===== Filter ===== */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-btn {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-dim);
  background: var(--color-glass);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  padding: 7px 18px;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.filter-btn:hover {
  color: var(--color-text);
  border-color: var(--color-acid);
}

.filter-btn.is-active {
  background: var(--color-acid);
  color: var(--color-dark);
  border-color: var(--color-acid);
  font-weight: 600;
  box-shadow: 0 2px 12px rgba(0, 255, 163, 0.25);
}

/* ===== Reveal ===== */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.45s ease, transform 0.45s ease;
}

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

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 800px) {
  .site-header__inner {
    padding: 12px 16px 0;
  }

  .site-header__float {
    padding: 6px 6px 6px 16px;
  }

  .site-header.is-scrolled .site-header__float {
    padding: 4px 4px 4px 12px;
  }

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

  .site-nav {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    z-index: 100;
  }

  .site-nav__list {
    display: none;
    flex-direction: column;
    background: rgba(10, 30, 50, 0.96);
    -webkit-backdrop-filter: blur(24px);
    backdrop-filter: blur(24px);
    border: 1px solid var(--color-line);
    border-radius: var(--radius-lg);
    padding: 10px;
    box-shadow: var(--shadow-float);
  }

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

  .site-nav__item {
    width: 100%;
  }

  .site-nav__item + .site-nav__item {
    border-top: 1px solid rgba(35, 87, 137, 0.6);
    margin-top: 4px;
    padding-top: 4px;
  }

  .site-nav__link {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    padding: 12px 16px;
    border-radius: 10px;
    font-size: 15px;
  }

  .site-nav__link[aria-current="page"] {
    background: rgba(0, 255, 163, 0.12);
    color: var(--color-acid);
    box-shadow: none;
  }

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

@media (max-width: 640px) {
  .site-footer__grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .site-footer {
    padding: 44px 0 24px;
  }

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

  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }

  .container {
    padding: 0 16px;
  }
}

@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;
  }

  .site-header__float,
  .site-header.is-scrolled .site-header__float {
    padding: 7px 8px 7px 20px;
    background: rgba(10, 30, 50, 0.85);
  }

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