:root {
  --color-bg: #0a0a0f;
  --color-bg-alt: #1a0f2e;
  --color-panel: #2d1b4e;
  --color-neon: #00e5ff;
  --color-green: #39ff14;
  --color-lilac: #a78bfa;
  --color-white: #ffffff;
  --color-muted: #cccccc;
  --color-magenta: #ff2d95;
  --font-headline: "Arial Black", "Impact", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-index: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --content-max: 1200px;
  --header-height: 80px;
  --radius: 14px;
  --border-width: 3px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
  --glow-neon: 0 0 12px rgba(0, 229, 255, 0.55), 0 0 32px rgba(0, 229, 255, 0.2);
  --glow-green: 0 0 12px rgba(57, 255, 20, 0.45);
  --transition: 240ms ease;
}

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

html {
  scroll-behavior: smooth;
}

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

body {
  font-family: var(--font-body);
  background: linear-gradient(145deg, var(--color-bg) 0%, var(--color-bg-alt) 55%, #12082a 100%);
  color: var(--color-white);
  line-height: 1.75;
  min-height: 100vh;
}

a {
  color: var(--color-neon);
  text-decoration: none;
  transition: color var(--transition), text-shadow var(--transition);
}

a:hover {
  color: var(--color-white);
  text-shadow: 0 0 8px rgba(0, 229, 255, 0.6);
}

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

address {
  font-style: normal;
}

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

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

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

.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;
  top: -100px;
  left: 16px;
  z-index: 3000;
  background: var(--color-neon);
  color: var(--color-bg);
  font-weight: 700;
  padding: 12px 20px;
  border-radius: 0 0 12px 12px;
  transition: top var(--transition);
}

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

.site-header {
  position: sticky;
  top: 18px;
  z-index: 1000;
  padding: 0 16px;
  margin: 0 auto 32px;
  pointer-events: none;
}

.header-inner {
  pointer-events: auto;
  max-width: var(--content-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  background: rgba(26, 15, 46, 0.72);
  border: 2px solid rgba(167, 139, 250, 0.35);
  border-radius: 999px;
  padding: 10px 14px 10px 18px;
  box-shadow: var(--shadow), inset 0 0 22px rgba(0, 229, 255, 0.04);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--color-white);
}

.brand:hover {
  color: var(--color-white);
  text-shadow: none;
}

.brand-mark {
  width: 48px;
  height: 48px;
  flex: 0 0 48px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--color-neon), var(--color-bg-alt));
  border: 2px solid var(--color-neon);
  border-radius: 14px;
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: 1rem;
  color: var(--color-bg);
  box-shadow: var(--glow-neon);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-name {
  font-family: var(--font-headline);
  font-size: 1.35rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  text-shadow: 0 0 10px rgba(0, 229, 255, 0.45);
}

.brand-tagline {
  font-size: 0.68rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--color-lilac);
  text-transform: uppercase;
}

.main-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.nav-link {
  display: inline-block;
  padding: 10px 16px;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-muted);
  border: 2px solid transparent;
  transition: color var(--transition), background-color var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.nav-link:hover {
  color: var(--color-white);
  background: rgba(0, 229, 255, 0.08);
  border-color: rgba(0, 229, 255, 0.25);
}

.nav-link[aria-current="page"] {
  color: var(--color-bg);
  background: var(--color-neon);
  border-color: var(--color-neon);
  box-shadow: var(--glow-neon);
}

.nav-toggle {
  display: none;
  width: 52px;
  height: 52px;
  border: 2px solid var(--color-neon);
  border-radius: 18px;
  background: rgba(0, 229, 255, 0.08);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 6px;
  transition: box-shadow var(--transition), border-color var(--transition);
}

.nav-toggle:hover {
  box-shadow: var(--glow-neon);
  border-color: var(--color-white);
}

.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-neon);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  transform: translateY(8px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(4) {
  transform: translateY(-8px) rotate(-45deg);
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 4px;
  width: 100%;
  background: transparent;
  transform-origin: left;
  transform: scaleX(var(--scroll-progress, 0));
  background: linear-gradient(90deg, var(--color-neon), var(--color-green));
  box-shadow: var(--glow-neon);
  z-index: 5000;
  pointer-events: none;
}

.site-footer {
  background: linear-gradient(180deg, rgba(10, 10, 15, 0.85), #07050d);
  border-top: 3px solid var(--color-panel);
  margin-top: 80px;
  padding: 64px 16px 0;
}

.footer-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 0.8fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
}

.brand--footer .brand-mark {
  width: 42px;
  height: 42px;
  flex-basis: 42px;
  font-size: 0.88rem;
}

.footer-trust {
  color: var(--color-muted);
  font-size: 0.9rem;
  max-width: 340px;
}

.footer-heading {
  font-family: var(--font-headline);
  font-size: 0.95rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-neon);
  margin-bottom: 16px;
  text-shadow: 0 0 8px rgba(0, 229, 255, 0.35);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: var(--color-muted);
  font-size: 0.92rem;
}

.footer-links a:hover {
  color: var(--color-white);
  text-shadow: 0 0 8px rgba(0, 229, 255, 0.5);
}

.footer-contact address {
  color: var(--color-muted);
  font-size: 0.9rem;
  line-height: 2;
}

.footer-bottom {
  border-top: 2px solid rgba(167, 139, 250, 0.2);
  padding: 18px 0;
  text-align: center;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 18px;
  font-size: 0.88rem;
  color: var(--color-muted);
}

.container {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 20px;
}

.breadcrumb {
  margin-bottom: 36px;
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 10px 0;
}

.breadcrumb-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  color: var(--color-lilac);
  opacity: 0.6;
}

.breadcrumb-link {
  color: var(--color-lilac);
}

.breadcrumb-link:hover {
  color: var(--color-neon);
}

.breadcrumb-item[aria-current="page"] {
  color: var(--color-white);
  font-weight: 600;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 999px;
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  border: 3px solid transparent;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
}

.btn-primary {
  background: var(--color-neon);
  color: var(--color-bg);
  border-color: var(--color-neon);
  box-shadow: 0 0 16px rgba(0, 229, 255, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--glow-neon);
  background: var(--color-white);
  border-color: var(--color-white);
}

.btn-outline {
  background: transparent;
  color: var(--color-neon);
  border-color: var(--color-neon);
}

.btn-outline:hover {
  background: rgba(0, 229, 255, 0.12);
  box-shadow: var(--glow-neon);
  transform: translateY(-2px);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.card {
  background: linear-gradient(135deg, rgba(45, 27, 78, 0.9), rgba(26, 15, 46, 0.95));
  border: 3px solid rgba(167, 139, 250, 0.3);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.card:hover {
  border-color: var(--color-neon);
  box-shadow: var(--glow-neon), var(--shadow);
  transform: translateY(-4px);
}

.media-frame {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 3px solid rgba(167, 139, 250, 0.4);
  background:
    linear-gradient(135deg, rgba(0, 229, 255, 0.08), rgba(57, 255, 20, 0.05)),
    repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.04) 0 8px, transparent 8px 16px);
  box-shadow: var(--shadow);
}

.media-frame::before {
  content: "";
  display: block;
  padding-top: 56.25%;
}

.media-frame--fixed::before {
  padding-top: 75%;
}

.media-frame--wide::before {
  padding-top: 42.5%;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  border: 2px solid transparent;
  line-height: 1.5;
}

.badge-new {
  color: var(--color-bg);
  background: var(--color-green);
  border-color: var(--color-green);
  box-shadow: var(--glow-green);
}

.badge-updated {
  color: var(--color-bg);
  background: var(--color-neon);
  border-color: var(--color-neon);
  box-shadow: var(--glow-neon);
}

@media (max-width: 900px) {
  .header-inner {
    flex-wrap: wrap;
    border-radius: 24px;
  }

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

  .main-nav {
    display: none;
    order: 3;
    flex-basis: 100%;
    justify-content: center;
    padding: 10px 0 4px;
  }

  .main-nav[data-open] {
    display: flex;
    animation: navIn var(--transition);
  }

  .nav-list {
    flex-direction: column;
    width: 100%;
    gap: 8px;
  }

  .nav-link {
    display: block;
    width: 100%;
    text-align: center;
    background: rgba(45, 27, 78, 0.75);
    border: 2px solid rgba(167, 139, 250, 0.2);
  }

  .nav-link[aria-current="page"] {
    background: var(--color-neon);
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
  }
}

@keyframes navIn {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 560px) {
  .header-inner {
    border-radius: 18px;
    padding: 10px;
  }

  .brand-tagline {
    display: none;
  }

  .brand-mark {
    width: 42px;
    height: 42px;
    flex-basis: 42px;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
  }

  .card:hover,
  .btn:hover {
    transform: none;
  }
}