:root {
  --bg-deep: #0A0E27;
  --bg-midnight: #050814;
  --accent-cyan: #00D4FF;
  --accent-gold: #FFD700;
  --accent-purple: #B829FF;
  --text-silver: #C0C0C8;
  --dark-gold: #B8860B;
  --warning-orange: #FF8C00;
  --font-heading: "Russo One", "Arial Black", "Noto Sans SC", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "Courier New", monospace;
  --container: 1200px;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
}

*, *::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);
  background: var(--bg-deep);
  color: var(--text-silver);
  line-height: 1.7;
  min-height: 100vh;
}

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

ul[class], ol[class] {
  list-style: none;
}

a {
  color: var(--accent-cyan);
  text-decoration: none;
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

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

button {
  font: inherit;
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--accent-gold);
  outline-offset: 2px;
}

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

.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: absolute;
  left: -9999px;
  z-index: 200;
  background: var(--accent-gold);
  color: var(--bg-deep);
  padding: var(--space-2) var(--space-4);
  border-radius: 4px;
  font-weight: 700;
}

.skip-link:focus {
  left: var(--space-4);
  top: var(--space-4);
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section {
  padding: var(--space-8) 0;
}

.grid {
  display: grid;
  gap: var(--space-6);
}

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

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

.card {
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(0, 212, 255, 0.2);
  border-radius: 4px;
  padding: var(--space-6);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.card:hover {
  border-color: var(--accent-gold);
  box-shadow: 0 0 20px rgba(255, 215, 0, 0.1);
}

.card-title {
  font-family: var(--font-heading);
  color: var(--accent-cyan);
  margin-bottom: var(--space-3);
  font-size: 1.2rem;
}

.media-frame {
  position: relative;
  overflow: hidden;
  background: var(--bg-midnight);
  border: 1px solid rgba(255, 255, 255, 0.1);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
  aspect-ratio: 16 / 9;
}

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.9) contrast(1.05);
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.08), transparent 40%);
  border: 1px solid rgba(255, 215, 0, 0.3);
  inset: 6px;
}

.data-stat {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  color: var(--accent-gold);
  font-weight: 700;
}

.breadcrumb {
  padding: var(--space-3) 0;
  font-size: 0.9rem;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.breadcrumb li {
  display: inline-flex;
  align-items: center;
}

.breadcrumb li:not(:last-child)::after {
  content: "/";
  margin-left: var(--space-2);
  color: #888;
}

.breadcrumb a {
  color: var(--accent-cyan);
}

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

.prose {
  max-width: 70ch;
  line-height: 1.8;
}

.prose h2,
.prose h3,
.prose h4 {
  margin-top: var(--space-8);
  margin-bottom: var(--space-4);
  color: var(--accent-gold);
  font-family: var(--font-heading);
}

.prose p {
  margin-bottom: var(--space-4);
}

.prose ul,
.prose ol {
  margin: 0 0 var(--space-4) var(--space-6);
}

.prose li {
  margin-bottom: var(--space-2);
}

.prose a {
  color: var(--accent-cyan);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  transition: filter 0.2s ease, background 0.2s ease;
}

.btn-gold {
  background: linear-gradient(135deg, var(--accent-gold), var(--dark-gold));
  color: var(--bg-deep);
  clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
  font-family: var(--font-heading);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.btn-gold:hover {
  filter: brightness(1.1);
  color: var(--bg-deep);
}

.site-header {
  position: relative;
  z-index: 100;
  background: linear-gradient(180deg, var(--bg-midnight) 0%, var(--bg-deep) 100%);
  border-bottom: 1px solid rgba(184, 134, 11, 0.5);
  box-shadow: 0 0 20px rgba(184, 134, 11, 0.15);
}

.header-frame {
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--space-3) var(--space-6);
}

.masthead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--text-silver);
}

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

.brand-logo {
  font-size: 1.8rem;
  color: var(--accent-gold);
  filter: drop-shadow(0 0 8px rgba(255, 215, 0, 0.5));
  line-height: 1;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-main {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  color: var(--accent-gold);
  letter-spacing: 0.03em;
  text-transform: uppercase;
  white-space: nowrap;
}

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

.masthead-right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.search-box {
  display: flex;
  align-items: center;
  background: var(--bg-midnight);
  border: 1px solid var(--accent-cyan);
  border-radius: 4px;
  transition: box-shadow 0.2s ease;
}

.search-box:focus-within {
  box-shadow: 0 0 0 2px var(--accent-purple);
}

.search-box input {
  background: transparent;
  border: none;
  color: var(--text-silver);
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-mono);
  width: 170px;
  font-size: 0.9rem;
}

.search-box input::placeholder {
  color: #777;
}

.search-box input:focus {
  outline: none;
}

.search-box button {
  background: var(--accent-cyan);
  border: none;
  color: var(--bg-deep);
  padding: var(--space-2) var(--space-3);
  border-radius: 0 4px 4px 0;
  font-weight: 900;
  transition: background 0.2s ease;
}

.search-box button:hover {
  background: var(--accent-gold);
}

.site-nav {
  border-top: 1px solid rgba(255, 215, 0, 0.2);
  border-bottom: 1px solid rgba(255, 215, 0, 0.2);
  margin-top: var(--space-3);
  background: rgba(5, 8, 20, 0.6);
}

.nav-list {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
}

.site-nav a {
  display: block;
  padding: var(--space-3) var(--space-4);
  color: var(--text-silver);
  font-weight: 500;
}

.site-nav a:hover {
  color: var(--accent-gold);
  background: rgba(255, 215, 0, 0.08);
}

.site-nav a[aria-current="page"] {
  color: var(--accent-gold);
  background: rgba(255, 215, 0, 0.06);
}

.site-nav a[aria-current="page"]::after {
  content: "";
  display: block;
  height: 2px;
  background: var(--accent-gold);
  transform: skewX(-30deg);
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--accent-cyan);
  color: var(--accent-cyan);
  padding: var(--space-2) var(--space-3);
  border-radius: 4px;
  font-size: 1.1rem;
  line-height: 1;
  transition: background 0.2s ease, color 0.2s ease;
}

.nav-toggle:hover {
  background: var(--accent-cyan);
  color: var(--bg-deep);
}

.site-footer {
  background: var(--bg-midnight);
  border-top: 3px solid var(--accent-gold);
  margin-top: var(--space-8);
}

.footer-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--space-8) var(--space-6);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-8);
}

.brand-mini {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  color: var(--accent-gold);
  letter-spacing: 0.03em;
}

.footer-trust {
  margin-top: var(--space-3);
  color: var(--text-silver);
  font-size: 0.9rem;
  letter-spacing: 0.02em;
}

.footer-title {
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-gold);
  margin-bottom: var(--space-3);
  border-left: 3px solid var(--accent-purple);
  padding-left: var(--space-3);
  font-family: var(--font-heading);
}

.footer-links ul {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--space-2);
}

.footer-links a {
  color: var(--text-silver);
}

.footer-links a:hover {
  color: var(--accent-cyan);
}

.footer-contact p {
  margin: var(--space-2) 0;
  color: var(--text-silver);
  font-size: 0.9rem;
}

.footer-bottom {
  background: rgba(0, 0, 0, 0.3);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--space-3) var(--space-6);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-2);
  color: var(--text-silver);
  font-size: 0.85rem;
}

@media (max-width: 1024px) {
  .grid-cols-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .search-box input {
    width: 130px;
  }
}

@media (max-width: 767px) {
  .container,
  .header-frame,
  .footer-main,
  .footer-bottom-inner {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
  }

  .brand-main {
    font-size: 1.1rem;
  }

  .brand-sub {
    display: none;
  }

  .search-box {
    display: none;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-midnight);
    border: none;
    border-top: 2px solid var(--accent-gold);
    box-shadow: 0 16px 24px rgba(0, 0, 0, 0.4);
  }

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

  .site-nav .nav-list {
    flex-direction: column;
  }

  .site-nav a {
    padding: var(--space-4) var(--space-6);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }

  .nav-toggle {
    display: inline-flex;
  }

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

@media (max-width: 480px) {
  .brand-logo {
    font-size: 1.4rem;
  }

  .brand-main {
    font-size: 1rem;
  }

  .btn-gold {
    padding: var(--space-2) var(--space-3);
    font-size: 0.85rem;
  }
}

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

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