:root {
  --color-bg: #0B1B3A;
  --color-bg-deep: #060F22;
  --color-panel: #12264A;
  --color-neon: #39FF14;
  --color-orange: #FF6D00;
  --color-ink: #F5F1E8;
  --color-muted: #A0A8C0;
  --color-data: #00B4D8;
  --color-violet: #7B2CBF;
  --color-line: #1E2A4A;
  --font-display: "Space Grotesk", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, monospace;
  --header-h: 78px;
  --container: 1280px;
  --transition: 0.3s ease;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--color-bg);
  background-image:
    radial-gradient(circle at 18% 12%, rgba(123, 44, 191, 0.16), transparent 36%),
    radial-gradient(circle at 88% -4%, rgba(57, 255, 20, 0.08), transparent 26%),
    linear-gradient(rgba(245, 241, 232, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(245, 241, 232, 0.02) 1px, transparent 1px);
  background-size: auto, auto, 48px 48px, 48px 48px;
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  overflow-wrap: break-word;
  text-rendering: optimizeLegibility;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0 0 0.5em;
  font-family: var(--font-display);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

p {
  margin: 0 0 1em;
}

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

a {
  color: var(--color-neon);
  text-underline-offset: 2px;
}

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

::selection {
  background: var(--color-neon);
  color: var(--color-bg);
}

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

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

button {
  font: inherit;
  cursor: pointer;
}

main {
  display: block;
  flex: 1;
  width: 100%;
}

#main-content {
  outline: none;
  scroll-margin-top: calc(var(--header-h) + 12px);
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 300;
  transform: translateY(-260%);
  background: var(--color-neon);
  color: var(--color-bg);
  padding: 10px 16px;
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
  box-shadow: 0 0 0 4px rgba(11, 27, 58, 0.6), 0 4px 18px rgba(0, 0, 0, 0.35);
  transition: transform 0.2s ease;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 27, 58, 0.88);
  border-bottom: 1px solid var(--color-line);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.header-shell {
  max-width: var(--container);
  min-height: var(--header-h);
  margin-inline: auto;
  padding-inline: clamp(18px, 3vw, 40px);
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand,
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--color-ink);
  text-decoration: none;
  flex-shrink: 0;
}

.brand-glyph {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  background: var(--color-neon);
  color: var(--color-bg);
  font: 700 18px/1 var(--font-display);
  clip-path: polygon(0 0, calc(100% - 9px) 0, 100% 9px, 100% 100%, 9px 100%, 0 calc(100% - 9px));
}

.brand-name {
  display: flex;
  flex-direction: column;
  font: 700 20px/1.1 var(--font-display);
  letter-spacing: 0.04em;
}

.brand-sub {
  margin-top: 3px;
  font: 600 10px/1.2 var(--font-mono);
  letter-spacing: 0.22em;
  color: var(--color-muted);
  text-transform: uppercase;
}

.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 16px;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
}

.nav-list a {
  display: inline-block;
  padding: 10px 14px;
  color: var(--color-muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 15px;
  border: 1px solid transparent;
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

.nav-list a:hover {
  color: var(--color-ink);
  background: rgba(245, 241, 232, 0.05);
  border-color: var(--color-line);
}

.nav-list a[aria-current="page"] {
  color: var(--color-neon);
  background: rgba(57, 255, 20, 0.07);
  border-color: rgba(57, 255, 20, 0.3);
  box-shadow: inset 0 -2px 0 var(--color-neon);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-left: 16px;
  border-left: 1px solid var(--color-line);
}

.header-extra {
  font: 600 12px/1 var(--font-mono);
  letter-spacing: 0.08em;
  color: var(--color-ink);
  text-transform: uppercase;
  padding: 9px 12px;
  border: 1px solid var(--color-line);
  background: rgba(18, 38, 74, 0.6);
  text-decoration: none;
  transition: border-color 0.25s ease, color 0.25s ease, background-color 0.25s ease;
}

.header-extra:hover {
  border-color: var(--color-neon);
  color: var(--color-neon);
}

.header-extra--accent {
  border-color: rgba(255, 109, 0, 0.55);
  color: var(--color-orange);
}

.header-extra--accent:hover {
  background: rgba(255, 109, 0, 0.08);
  border-color: var(--color-orange);
  color: var(--color-orange);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  background: none;
  border: 1px solid var(--color-line);
  padding: 10px 12px;
  color: var(--color-ink);
  font-weight: 500;
}

.nav-toggle[aria-expanded="true"] {
  border-color: var(--color-neon);
  color: var(--color-neon);
}

.nav-toggle-label {
  font: 600 12px/1 var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.nav-toggle-box {
  display: inline-flex;
  flex-direction: column;
  width: 18px;
}

.nav-toggle-box span {
  display: block;
  height: 2px;
  background: currentColor;
  margin: 2px 0;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

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

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

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

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 200;
  pointer-events: none;
  background: linear-gradient(90deg, var(--color-neon), var(--color-orange));
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.08s linear;
}

.site-footer {
  position: relative;
  flex-shrink: 0;
  margin-top: auto;
  background: linear-gradient(180deg, var(--color-panel), var(--color-bg-deep));
  border-top: 1px solid var(--color-line);
  overflow: hidden;
}

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

.footer-shell {
  max-width: var(--container);
  margin-inline: auto;
  padding: 64px clamp(20px, 4vw, 40px) 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.9fr) minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: clamp(24px, 4vw, 48px);
}

.footer-block--nav,
.footer-block--contact,
.footer-block--legal {
  border-left: 1px solid var(--color-line);
  padding-left: clamp(18px, 2vw, 28px);
}

.footer-brand {
  margin-bottom: 14px;
}

.site-footer .brand-glyph {
  width: 36px;
  height: 36px;
  font-size: 14px;
}

.site-footer .brand-name {
  font-size: 18px;
}

.site-footer .brand-sub {
  font-size: 9px;
}

.footer-intro {
  color: var(--color-muted);
  font-size: 15px;
  max-width: 44ch;
  margin-bottom: 16px;
}

.footer-trust {
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  border-left: 3px solid var(--color-neon);
  padding: 8px 12px;
  background: rgba(57, 255, 20, 0.04);
  margin: 0;
}

.footer-heading {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-neon);
}

.footer-heading::after {
  content: "";
  height: 1px;
  background: var(--color-line);
  flex: 1;
}

.footer-links,
.footer-contact {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-links li + li {
  margin-top: 2px;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-muted);
  text-decoration: none;
  padding: 6px 0;
  font-size: 15px;
  transition: color 0.2s ease, transform 0.2s ease;
}

.footer-links a::before {
  content: "//";
  font-family: var(--font-mono);
  color: var(--color-orange);
  font-size: 13px;
  opacity: 0.8;
}

.footer-links a:hover {
  color: var(--color-ink);
  transform: translateX(4px);
}

.footer-contact li {
  display: flex;
  gap: 10px;
  margin: 0;
  padding: 8px 0;
  border-bottom: 1px dashed var(--color-line);
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.5;
}

.footer-contact li:last-child {
  border-bottom: 0;
}

.footer-contact li span:last-child {
  flex: 1;
}

.footer-label {
  flex: 0 0 62px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-data);
}

.footer-more {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 14px;
  color: var(--color-neon);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.footer-more::after {
  content: "→";
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid var(--color-line);
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 12px;
}

.footer-bottom p {
  margin: 0;
}

.content-container {
  width: min(100%, var(--container));
  margin-inline: auto;
  padding-inline: clamp(18px, 4vw, 40px);
}

.content-narrow {
  max-width: 900px;
  margin-inline: auto;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
  list-style: none;
  padding: 18px 0;
  margin: 0;
  color: var(--color-muted);
  font: 500 13px/1.4 var(--font-mono);
}

.breadcrumbs li {
  display: flex;
  align-items: center;
  gap: 10px;
}

.breadcrumbs li::after {
  content: "/";
  color: var(--color-orange);
}

.breadcrumbs li:last-child::after {
  content: none;
}

.breadcrumbs a {
  color: var(--color-muted);
  text-decoration: none;
}

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

.section-kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 8px;
  font: 600 12px/1.2 var(--font-mono);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-neon);
}

.section-kicker::before {
  content: "";
  width: 20px;
  height: 2px;
  background: var(--color-orange);
}

.section-title {
  margin: 0 0 10px;
  font-size: clamp(30px, 4.5vw, 52px);
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.section-lede {
  color: var(--color-muted);
  font-size: clamp(16px, 2vw, 19px);
  max-width: 64ch;
}

.section-rule {
  height: 1px;
  border: 0;
  margin: 24px 0;
  background: linear-gradient(90deg, var(--color-neon), var(--color-orange) 38%, var(--color-line) 80%);
}

.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 14px;
}

.bento-card {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 180px;
  grid-column: span 4;
  padding: 20px;
  background: linear-gradient(145deg, rgba(18, 38, 74, 0.95), rgba(11, 27, 58, 0.98));
  border: 1px solid var(--color-line);
  overflow: hidden;
  transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}

.bento-card::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 48px;
  height: 3px;
  background: var(--color-neon);
  transition: width 0.3s ease;
}

.bento-card:hover {
  border-color: rgba(57, 255, 20, 0.55);
  transform: translateY(-3px);
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.36);
}

.bento-card:hover::after {
  width: 100%;
}

.bento-card--wide {
  grid-column: span 7;
}

.bento-card--tall {
  grid-row: span 2;
  min-height: 380px;
}

.bento-card--dark {
  background: linear-gradient(135deg, #050B18, #0B1B3A);
}

.bento-index {
  font: 500 12px/1 var(--font-mono);
  color: var(--color-orange);
  letter-spacing: 0.12em;
}

.bento-meta {
  font: 500 12px/1.4 var(--font-mono);
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

.bento-title {
  font: 700 clamp(20px, 2.6vw, 30px)/1.2 var(--font-display);
  margin: 0 0 8px;
}

.bento-text {
  font-size: 15px;
  color: var(--color-muted);
}

.data-label {
  display: block;
  font: 500 11px/1.2 var(--font-mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: 8px;
}

.data-value {
  font: 700 clamp(28px, 3.6vw, 46px)/1 var(--font-mono);
  color: var(--color-neon);
  letter-spacing: -0.04em;
}

.data-value small {
  font-size: 0.55em;
  color: var(--color-orange);
  margin-left: 4px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 12px 18px;
  background: var(--color-neon);
  color: var(--color-bg);
  font: 700 15px/1 var(--font-display);
  text-decoration: none;
  border: 1px solid transparent;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
  transition: background 0.25s ease, color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}

.btn:hover {
  background: var(--color-data);
  color: var(--color-bg);
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(0, 180, 216, 0.2);
}

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

.btn--ghost:hover {
  background: rgba(57, 255, 20, 0.08);
  color: var(--color-neon);
}

.btn--orange {
  background: var(--color-orange);
  color: #0B1B3A;
}

.btn--orange:hover {
  background: #FF8B3D;
  color: #0B1B3A;
}

.scan-line {
  position: relative;
  overflow: hidden;
}

.scan-line::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(0deg, rgba(245, 241, 232, 0.025) 0 1px, transparent 1px 4px);
}

.mono-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
  background: rgba(0, 180, 216, 0.12);
  border: 1px solid rgba(0, 180, 216, 0.35);
  color: var(--color-data);
  font: 600 12px/1 var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.vertical-note {
  writing-mode: vertical-rl;
  font: 600 12px/1.6 var(--font-mono);
  letter-spacing: 0.24em;
  color: var(--color-muted);
  text-transform: uppercase;
}

@media (max-width: 1020px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 960px) {
  .header-shell {
    flex-wrap: wrap;
    gap: 10px;
    padding-top: 10px;
    padding-bottom: 10px;
    min-height: 0;
  }

  .site-nav {
    display: none;
    flex: 1 1 100%;
    order: 5;
    margin-left: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    border-top: 1px solid var(--color-line);
    padding-top: 14px;
    margin-top: 6px;
  }

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

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav-list a {
    padding: 13px 12px;
  }

  .nav-list a[aria-current="page"] {
    border-left: 2px solid var(--color-neon);
    box-shadow: none;
    background: rgba(57, 255, 20, 0.06);
  }

  .header-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    padding-left: 0;
    padding-top: 12px;
    margin-top: 8px;
    border-left: 0;
    border-top: 1px solid var(--color-line);
  }

  .header-extra {
    text-align: center;
  }

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

@media (max-width: 640px) {
  .brand-sub {
    display: none;
  }

  .brand-glyph {
    width: 36px;
    height: 36px;
    font-size: 14px;
  }

  .brand-name {
    font-size: 18px;
  }

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

  .footer-block--nav,
  .footer-block--contact,
  .footer-block--legal {
    border-left: 0;
    padding-left: 0;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .bento-grid {
    grid-template-columns: 1fr;
  }

  .bento-card,
  .bento-card--wide,
  .bento-card--tall {
    grid-column: span 1;
  }

  .btn {
    width: 100%;
  }
}

@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;
  }

  .scroll-progress {
    transition: none;
  }
}