:root {
  --color-bg: #0B0813;
  --color-bg-alt: #151025;
  --color-surface: #1E1730;
  --color-accent: #F5C518;
  --color-accent-2: #00FF87;
  --color-text: #F2F2F7;
  --color-text-dim: #A3A3B8;
  --color-border: #2A2340;
  --color-data: #00E5FF;
  --color-alert: #FF4D4F;

  --font-head: "Chakra Petch", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", "SFMono-Regular", "Menlo", monospace;

  --container: min(1180px, calc(100% - 40px));
  --radius: 12px;
  --radius-sm: 8px;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4.5rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 0.5em;
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 1.22;
  color: var(--color-text);
}

p {
  margin: 0 0 1rem;
}

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

a:hover {
  color: var(--color-accent-2);
}

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

ul, ol {
  margin: 0;
  padding: 0;
}

.container {
  width: min(1180px, calc(100% - 40px));
  margin-inline: auto;
}

#main-content {
  scroll-margin-top: 120px;
}

.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: fixed;
  top: 0;
  left: 0;
  z-index: 2000;
  display: inline-block;
  padding: 0.6rem 1.2rem;
  background: var(--color-accent);
  color: var(--color-bg);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.85rem;
  border-radius: 0 0 var(--radius-sm) 0;
  transform: translateY(-130%);
  transition: transform 0.25s ease;
}

.skip-link:hover {
  color: var(--color-bg);
}

.skip-link:focus-visible {
  transform: translateY(0);
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1600;
  width: 100%;
  height: 3px;
  background: rgba(255, 255, 255, 0.04);
  pointer-events: none;
}

.scroll-progress-bar {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-2));
  transform: scaleX(0);
  transform-origin: 0 50%;
  will-change: transform;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(11, 8, 19, 0.94);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border);
}

.site-header::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -1px;
  width: 42%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-accent-2), transparent);
  pointer-events: none;
}

.header-console {
  width: min(1240px, calc(100% - 40px));
  margin-inline: auto;
}

.console-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-top: 0.8rem;
  padding-bottom: 0.65rem;
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
}

.brand-mark {
  position: relative;
  display: block;
  flex: 0 0 42px;
  width: 42px;
  height: 42px;
  background: conic-gradient(from 220deg at 50% 50%, var(--color-accent), var(--color-accent-2), var(--color-accent));
  clip-path: polygon(50% 0, 100% 25%, 82% 100%, 18% 100%, 0 25%);
  filter: drop-shadow(0 0 6px rgba(245, 197, 24, 0.45));
}

.brand-mark::after {
  content: "";
  position: absolute;
  inset: 6px;
  background: var(--color-bg);
  clip-path: polygon(50% 0, 100% 25%, 82% 100%, 18% 100%, 0 25%);
}

.brand-mark-sm {
  flex-basis: 32px;
  width: 32px;
  height: 32px;
}

.brand-mark-sm::after {
  inset: 4px;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
  min-width: 0;
}

.brand-name {
  margin: 0;
  font-family: var(--font-head);
  font-size: 1.18rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-text);
  white-space: nowrap;
}

.brand-tagline {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.24em;
  color: var(--color-accent);
  text-transform: uppercase;
  white-space: nowrap;
}

.system-status {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.32rem 0.9rem;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--color-text-dim);
  min-height: 32px;
  transform: skewX(-10deg);
}

.system-status > * {
  transform: skewX(10deg);
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-accent-2);
  box-shadow: 0 0 0 0 rgba(0, 255, 135, 0.5);
  animation: status-pulse 2.2s ease-out infinite;
}

.status-label {
  color: var(--color-accent-2);
  letter-spacing: 0.06em;
}

.status-route {
  color: var(--color-data);
  letter-spacing: 0.02em;
}

@keyframes status-pulse {
  0% { box-shadow: 0 0 0 0 rgba(0, 255, 135, 0.5); }
  70% { box-shadow: 0 0 0 7px rgba(0, 255, 135, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 255, 135, 0); }
}

.header-promo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.promo-label {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-dim);
}

.promo-link {
  display: inline-flex;
  align-items: center;
  padding: 0.42rem 1rem;
  background: linear-gradient(135deg, var(--color-accent), #E9A500);
  color: var(--color-bg);
  font-family: var(--font-head);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  border-radius: var(--radius-sm);
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 100%, 8px 100%);
  box-shadow: 0 4px 16px rgba(245, 197, 24, 0.28);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.promo-link:hover {
  color: var(--color-bg);
  transform: translateY(-1px);
  box-shadow: 0 8px 22px rgba(245, 197, 24, 0.42);
}

.console-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  flex-wrap: wrap;
}

.nav-link {
  position: relative;
  display: inline-block;
  padding: 0.7rem 0.8rem 0.85rem;
  color: var(--color-text-dim);
  font-family: var(--font-head);
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  white-space: nowrap;
  transition: color 0.2s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0.8rem;
  right: 0.8rem;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-2));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.nav-link:hover {
  color: var(--color-text);
}

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

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

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.55rem;
  padding: 0.45rem 0.8rem;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-family: var(--font-head);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  min-height: 38px;
}

.nav-toggle:hover {
  border-color: var(--color-accent);
}

.nav-toggle-bars {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
}

.nav-toggle-bar {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-accent);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.nav-toggle-label {
  font-size: 0.8rem;
}

.site-footer {
  position: relative;
  margin-top: var(--space-8);
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
}

.site-footer::before {
  content: "";
  display: block;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--color-accent), var(--color-accent-2), transparent);
}

.footer-console {
  width: min(1240px, calc(100% - 40px));
  margin-inline: auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1.4fr;
  gap: var(--space-7);
  padding: var(--space-7) 0 var(--space-6);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.6rem;
}

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

.footer-brand-name {
  margin: 0;
  font-family: var(--font-head);
  font-size: 1.45rem;
  letter-spacing: 0.08em;
  color: var(--color-text);
  font-weight: 700;
}

.footer-brand-sub {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.footer-trust {
  margin: 0.45rem 0 0;
  max-width: 34ch;
  color: var(--color-text-dim);
  font-size: 0.86rem;
}

.footer-heading {
  margin: 0 0 var(--space-4);
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-border);
  font-family: var(--font-head);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-link {
  width: fit-content;
  color: var(--color-text-dim);
  font-size: 0.92rem;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.footer-link:hover {
  color: var(--color-accent-2);
  padding-left: 4px;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.footer-contact-line {
  margin: 0;
  color: var(--color-text-dim);
  font-size: 0.9rem;
  word-break: break-word;
}

.footer-bottom {
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
}

.footer-bottom-inner {
  width: min(1240px, calc(100% - 40px));
  margin-inline: auto;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.4rem 1rem;
  padding: 1.15rem 0;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--color-text-dim);
}

.footer-bottom-inner p {
  margin: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.68rem 1.4rem;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-family: var(--font-head);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  line-height: 1.2;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-accent), #E8A800);
  color: var(--color-bg);
  box-shadow: 0 4px 14px rgba(245, 197, 24, 0.25);
}

.btn-primary:hover {
  color: var(--color-bg);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(245, 197, 24, 0.4);
}

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

.btn-outline:hover {
  background: rgba(245, 197, 24, 0.08);
  border-color: var(--color-accent-2);
  color: var(--color-text);
  transform: translateY(-2px);
}

.breadcrumbs {
  padding: var(--space-5) 0 0;
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.82rem;
}

.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin-right: 0.35rem;
  color: var(--color-border);
  font-family: var(--font-mono);
}

.breadcrumb-item a {
  color: var(--color-text-dim);
}

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

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

.page-hero {
  position: relative;
  padding: var(--space-7) 0 var(--space-6);
  background:
    radial-gradient(1100px 420px at 90% -10%, rgba(245, 197, 24, 0.1), transparent 60%),
    radial-gradient(900px 380px at 5% 110%, rgba(0, 255, 135, 0.08), transparent 60%);
  border-bottom: 1px solid var(--color-border);
  overflow: hidden;
}

.page-hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent-2);
}

.page-hero-eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--color-accent-2);
}

.page-hero-title {
  margin: 0 0 0.8rem;
  font-size: clamp(2rem, 5vw, 3.1rem);
  line-height: 1.1;
  letter-spacing: 0.02em;
}

.page-hero-lead {
  max-width: 58ch;
  margin: 0;
  color: var(--color-text-dim);
  font-size: 1.02rem;
}

.page-hero-chapters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: var(--space-5);
}

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

.section-head {
  max-width: 680px;
  margin-bottom: var(--space-6);
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent-2);
}

.section-eyebrow::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--color-accent-2);
}

.section-title {
  margin: 0;
  font-size: clamp(1.6rem, 3.6vw, 2.4rem);
}

.section-lead {
  margin: 0.6rem 0 0;
  color: var(--color-text-dim);
  max-width: 60ch;
}

.grid {
  display: grid;
  gap: var(--space-5);
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-5);
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(245, 197, 24, 0.4);
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.35);
}

.card-title {
  margin: 0 0 0.5rem;
  font-size: 1.15rem;
}

.card-body {
  margin: 0;
  color: var(--color-text-dim);
  font-size: 0.92rem;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.2rem 0.75rem;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  color: var(--color-text-dim);
  font-size: 0.75rem;
  line-height: 1.5;
}

.tag-hot {
  background: rgba(0, 255, 135, 0.06);
  border-color: rgba(0, 255, 135, 0.35);
  color: var(--color-accent-2);
}

.badge {
  display: inline-block;
  padding: 0.18rem 0.6rem;
  background: rgba(0, 229, 255, 0.1);
  border: 1px solid rgba(0, 229, 255, 0.25);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: var(--color-data);
}

.badge-alert {
  background: rgba(255, 77, 79, 0.12);
  border-color: rgba(255, 77, 79, 0.3);
  color: var(--color-alert);
}

.text-data {
  font-family: var(--font-mono);
  color: var(--color-data);
}

.flux-line {
  display: block;
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, transparent, var(--color-accent), var(--color-accent-2), transparent);
}

.skew-panel {
  padding: var(--space-5) var(--space-6);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 100%, 26px 100%);
}

.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.2, 0.7, 0.2, 1);
  transition-delay: var(--reveal-delay, 0s);
  will-change: opacity, transform;
}

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

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

a:focus-visible,
button:focus-visible {
  outline-color: var(--color-accent-2);
}

@media (max-width: 960px) {
  .grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-console {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 860px) {
  .nav-toggle {
    display: inline-flex;
    order: 1;
  }

  .console-nav {
    flex-wrap: wrap;
    justify-content: flex-end;
    padding: 0.65rem 0;
    row-gap: 0.55rem;
  }

  .primary-nav {
    display: none;
    order: 2;
    flex: 1 0 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

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

  .nav-link {
    width: 100%;
    padding: 0.7rem 0.4rem;
    border-bottom: 1px solid var(--color-border);
    text-align: left;
  }

  .nav-link:last-child {
    border-bottom: 0;
  }

  .nav-link::after {
    display: none;
  }

  .nav-link[aria-current="page"] {
    background: rgba(245, 197, 24, 0.07);
  }
}

@media (max-width: 700px) {
  .console-top {
    flex-wrap: wrap;
    row-gap: 0.55rem;
    padding-top: 0.7rem;
  }

  .system-status {
    order: 3;
    width: 100%;
    justify-content: center;
    border-radius: var(--radius-sm);
    transform: none;
  }

  .system-status > * {
    transform: none;
  }

  .header-promo {
    margin-left: auto;
  }

  .promo-label {
    display: none;
  }
}

@media (max-width: 600px) {
  .footer-console {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }

  .footer-bottom-inner {
    flex-direction: column;
  }

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

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

  .reveal {
    opacity: 1;
    transform: none;
  }

  .status-dot {
    animation: none;
  }
}