:root {
  --c-bg: #0A0E17;
  --c-bg-deep: #060A12;
  --c-blue: #00E5FF;
  --c-purple: #9D00FF;
  --c-silver: #C0C0C0;
  --c-green: #39FF14;
  --c-orange: #FF4500;
  --c-cream: #FFF8E7;
  --c-brown: #2E1F12;
  --c-text: #E5EDF8;
  --c-text-dim: #8A9BB5;
  --font-head: 'Orbitron', 'Microsoft YaHei', 'PingFang SC', sans-serif;
  --font-body: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
  --font-data: 'Courier New', Courier, monospace;
  --border-soft: rgba(157, 0, 255, 0.28);
  --border-strong: rgba(0, 229, 255, 0.5);
  --header-h: 68px;
  --container-w: 1200px;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-pill: 999px;
  --space-section: 96px;
}

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

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

body {
  margin: 0;
  background-color: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  overflow-x: hidden;
}

body.menu-open {
  overflow: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  padding: 0;
  margin: 0;
  list-style: none;
}

button {
  font: inherit;
  color: inherit;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-head);
  color: #ffffff;
  line-height: 1.25;
}

p {
  margin: 0;
}

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

::selection {
  background: rgba(0, 229, 255, 0.3);
  color: #ffffff;
}

.container {
  width: 100%;
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 32px);
}

.section {
  padding-block: clamp(56px, 8vw, var(--space-section));
}

.section--tight {
  padding-block: clamp(40px, 5vw, 64px);
}

.grid {
  display: grid;
  gap: var(--gap, 24px);
  grid-template-columns: repeat(var(--cols, 1), minmax(0, 1fr));
}

[data-cols="2"], .grid-cols-2 { --cols: 2; }
[data-cols="3"], .grid-cols-3 { --cols: 3; }
[data-cols="4"], .grid-cols-4 { --cols: 4; }

.prose {
  max-width: 72ch;
  color: var(--c-text-dim);
}

.prose p {
  margin-bottom: 1.2em;
}

.prose h2 {
  margin: 1.8em 0 0.6em;
  font-size: 1.4rem;
  color: #ffffff;
}

.prose h3 {
  margin: 1.4em 0 0.5em;
  font-size: 1.15rem;
  color: var(--c-blue);
}

.prose a {
  color: var(--c-blue);
  border-bottom: 1px solid rgba(0, 229, 255, 0.4);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.prose a:hover {
  color: #ffffff;
  border-color: #ffffff;
}

.prose ul,
.prose ol {
  margin: 0 0 1.2em;
  padding-left: 1.4em;
}

.prose li {
  margin-bottom: 0.45em;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 10px;
  margin: 0 0 24px;
  font-size: 0.85rem;
  color: var(--c-text-dim);
}

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

.breadcrumb li:not(:last-child)::after {
  content: '/';
  margin-left: 10px;
  color: rgba(157, 0, 255, 0.6);
}

.breadcrumb a:hover {
  color: var(--c-blue);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-size: 0.92rem;
  font-weight: 600;
  line-height: 1.4;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

.btn-primary {
  background: linear-gradient(90deg, #00E5FF, #00B8FF);
  color: #06121A;
  box-shadow: 0 0 16px rgba(0, 229, 255, 0.22);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 26px rgba(0, 229, 255, 0.38);
}

.btn-secondary {
  background: transparent;
  border-color: rgba(0, 229, 255, 0.5);
  color: var(--c-blue);
}

.btn-secondary:hover {
  background: rgba(0, 229, 255, 0.1);
  border-color: var(--c-blue);
  box-shadow: 0 0 20px rgba(0, 229, 255, 0.22);
  transform: translateY(-2px);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--c-blue);
  background: rgba(0, 229, 255, 0.08);
  border: 1px solid rgba(0, 229, 255, 0.35);
}

.chip--orange {
  color: var(--c-orange);
  border-color: rgba(255, 69, 0, 0.4);
  background: rgba(255, 69, 0, 0.08);
}

.chip--purple {
  color: #C77BFF;
  border-color: rgba(157, 0, 255, 0.45);
  background: rgba(157, 0, 255, 0.1);
}

.chip--green {
  color: var(--c-green);
  border-color: rgba(57, 255, 20, 0.4);
  background: rgba(57, 255, 20, 0.07);
}

.term-chip {
  display: inline-block;
  font-family: var(--font-data);
  font-size: 0.78rem;
  color: var(--c-silver);
  border: 1px solid rgba(192, 192, 192, 0.3);
  border-radius: 6px;
  padding: 2px 8px;
  background: rgba(192, 192, 192, 0.05);
}

.status-dot {
  display: inline-block;
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--c-green);
  box-shadow: 0 0 10px var(--c-green);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-head);
  font-size: 0.74rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--c-blue);
}

.eyebrow::before {
  content: '';
  width: 24px;
  height: 1px;
  background: linear-gradient(90deg, var(--c-blue), transparent);
}

.section-title {
  margin-top: 14px;
  font-size: clamp(1.7rem, 3.2vw, 2.6rem);
  letter-spacing: 0.01em;
}

.section-intro {
  max-width: 660px;
  margin-top: 14px;
  color: var(--c-text-dim);
}

.hud-card {
  position: relative;
  border-radius: var(--radius-lg);
  background: linear-gradient(150deg, rgba(13, 20, 36, 0.92), rgba(10, 14, 23, 0.9));
  border: 1px solid var(--border-soft);
  padding: 32px;
  overflow: hidden;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.hud-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 0%, rgba(0, 229, 255, 0.1), transparent 50%), radial-gradient(circle at 90% 100%, rgba(157, 0, 255, 0.12), transparent 45%);
  pointer-events: none;
}

.hud-card > * {
  position: relative;
  z-index: 1;
}

.hud-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 229, 255, 0.45);
  box-shadow: 0 20px 46px rgba(0, 0, 0, 0.45), 0 0 28px rgba(0, 229, 255, 0.08);
}

.hud-title {
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.hud-text {
  color: var(--c-text-dim);
  font-size: 0.95rem;
}

.data-panel {
  position: relative;
  background: var(--c-cream);
  color: var(--c-brown);
  border-radius: var(--radius-lg);
  padding: 28px;
  overflow: hidden;
  border: 1px solid rgba(46, 31, 18, 0.12);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.18), inset 0 0 0 1px rgba(255, 255, 255, 0.6);
}

.data-panel::before {
  content: '';
  position: absolute;
  top: 0;
  left: 24px;
  right: 24px;
  height: 3px;
  border-radius: 0 0 6px 6px;
  background: linear-gradient(90deg, var(--c-orange), var(--c-blue));
}

.data-label {
  font-family: var(--font-data);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(46, 31, 18, 0.6);
}

.data-value {
  font-family: var(--font-head);
  font-size: 1.8rem;
  color: var(--c-brown);
  margin-top: 6px;
}

.img-frame {
  position: relative;
  border-radius: 18px;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background:
    linear-gradient(135deg, rgba(0, 229, 255, 0.08), rgba(157, 0, 255, 0.14)),
    repeating-linear-gradient(0deg, rgba(0, 229, 255, 0.06) 0 1px, transparent 1px 22px),
    repeating-linear-gradient(90deg, rgba(0, 229, 255, 0.06) 0 1px, transparent 1px 22px),
    #0D1424;
  border: 1px solid var(--border-soft);
}

.img-frame::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 70% 30%, rgba(157, 0, 255, 0.22), transparent 60%);
}

.img-frame::after {
  content: '';
  position: absolute;
  inset: 14px;
  border: 1px solid rgba(0, 229, 255, 0.22);
  border-radius: 12px;
}

.img-frame[data-ratio="wide"] {
  aspect-ratio: 21 / 9;
}

.img-frame[data-ratio="square"] {
  aspect-ratio: 1 / 1;
}

.img-frame[data-ratio="portrait"] {
  aspect-ratio: 4 / 5;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(8, 12, 20, 0.9);
  border-bottom: 1px solid rgba(0, 229, 255, 0.14);
}

.site-header::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-blue), var(--c-purple), transparent);
  opacity: 0.75;
}

.site-header[data-scrolled] {
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 100%;
}

.skip-link {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 120;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  background: var(--c-blue);
  color: #06121A;
  font-weight: 600;
  font-size: 0.88rem;
  transform: translateY(-160%);
  transition: transform 0.2s ease;
}

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

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  color: #ffffff;
}

.brand-mark {
  position: relative;
  flex: 0 0 auto;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: conic-gradient(from 210deg, #00E5FF, #9D00FF, #00E5FF);
  box-shadow: 0 0 18px rgba(0, 229, 255, 0.25);
}

.brand-mark::before {
  content: '';
  position: absolute;
  inset: 3px;
  border-radius: 9px;
  background: #0A0E17;
}

.brand-mark::after {
  content: '';
  position: absolute;
  left: 8px;
  right: 8px;
  top: 8px;
  bottom: 8px;
  border-radius: 5px;
  border: 1px solid rgba(0, 229, 255, 0.55);
  background: radial-gradient(circle at 60% 40%, #00E5FF 0 3px, transparent 3px);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
  min-width: 0;
}

.brand-name {
  font-family: var(--font-head);
  font-size: 1rem;
  letter-spacing: 0.06em;
  color: #ffffff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.brand-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-data);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-silver);
}

.brand-status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--c-green);
  box-shadow: 0 0 8px var(--c-green);
  animation: pulse-dot 2.2s ease-in-out infinite;
}

.brand-status-text {
  color: var(--c-silver);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

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

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

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  font-family: var(--font-head);
  font-size: 0.84rem;
  letter-spacing: 0.08em;
  color: var(--c-text-dim);
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.nav-index {
  font-family: var(--font-data);
  font-size: 0.72rem;
  color: var(--c-blue);
  opacity: 0.7;
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 1px;
  height: 2px;
  border-radius: 999px;
  background: var(--c-green);
  box-shadow: 0 0 8px var(--c-green);
  opacity: 0;
  transform: scaleX(0.3);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.nav-link:hover {
  color: var(--c-blue);
  background: rgba(0, 229, 255, 0.08);
  border-color: rgba(0, 229, 255, 0.35);
  box-shadow: 0 0 16px rgba(0, 229, 255, 0.15);
}

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

.nav-link[aria-current="page"] {
  color: #ffffff;
  background: linear-gradient(90deg, rgba(0, 229, 255, 0.16), rgba(157, 0, 255, 0.16));
  border-color: rgba(0, 229, 255, 0.55);
  box-shadow: inset 0 0 0 1px rgba(0, 229, 255, 0.15), 0 0 18px rgba(0, 229, 255, 0.12);
}

.nav-note {
  display: none;
}

.nav-toggle {
  display: none;
  position: relative;
  z-index: 96;
  align-items: center;
  gap: 8px;
  border: 1px solid rgba(0, 229, 255, 0.45);
  background: rgba(0, 229, 255, 0.06);
  color: var(--c-blue);
  border-radius: var(--radius-pill);
  padding: 8px 14px;
  font-size: 0.78rem;
  cursor: pointer;
  line-height: 1;
  transition: background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.nav-toggle:hover {
  background: rgba(0, 229, 255, 0.12);
  border-color: var(--c-blue);
  box-shadow: 0 0 14px rgba(0, 229, 255, 0.15);
}

.nav-toggle-icon {
  display: grid;
  gap: 3px;
  width: 16px;
  flex: none;
}

.nav-toggle-icon i {
  display: block;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transform-origin: center;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

body.menu-open .nav-toggle-icon i:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

body.menu-open .nav-toggle-icon i:nth-child(2) {
  opacity: 0;
}

body.menu-open .nav-toggle-icon i:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

.header-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  height: 2px;
  width: 0%;
  background: linear-gradient(90deg, var(--c-blue), var(--c-purple), var(--c-green));
  box-shadow: 0 0 8px rgba(0, 229, 255, 0.5);
  opacity: 0.9;
}

.site-footer {
  position: relative;
  border-top: 1px solid rgba(157, 0, 255, 0.25);
  background: linear-gradient(180deg, #0B101C, #070A12);
  overflow: hidden;
}

.site-footer::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(157, 0, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(157, 0, 255, 0.05) 1px, transparent 1px);
  background-size: 34px 34px;
  pointer-events: none;
  opacity: 0.55;
}

.site-footer::after {
  content: '';
  position: absolute;
  top: -80px;
  right: -80px;
  width: 280px;
  height: 280px;
  background: radial-gradient(circle, rgba(157, 0, 255, 0.12), transparent 70%);
  pointer-events: none;
}

.footer-top {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 2fr 1.2fr 1.2fr 1.4fr;
  gap: clamp(24px, 4vw, 44px);
  padding-block: clamp(48px, 7vw, 72px) 40px;
}

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

.footer-brand .brand-name {
  font-size: 0.95rem;
}

.footer-statement {
  max-width: 34em;
  color: var(--c-text-dim);
  font-size: 0.9rem;
  line-height: 1.8;
}

.footer-title {
  font-family: var(--font-head);
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-blue);
  margin-bottom: 16px;
}

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

.footer-links a {
  color: var(--c-text-dim);
  transition: color 0.2s ease, text-shadow 0.2s ease;
}

.footer-links a:hover {
  color: var(--c-blue);
  text-shadow: 0 0 12px rgba(0, 229, 255, 0.45);
}

.footer-contact-list li {
  color: var(--c-silver);
  font-size: 0.88rem;
}

.footer-bottom {
  position: relative;
  z-index: 1;
  border-top: 1px solid rgba(192, 192, 192, 0.14);
  padding-block: 18px 20px;
}

.footer-bottom-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 16px;
}

.footer-copy,
.footer-icp {
  margin: 0;
  font-family: var(--font-data);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--c-text-dim);
}

[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

@media (max-width: 960px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }

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

@media (max-width: 920px) {
  .site-nav {
    position: absolute;
    top: calc(100% + 8px);
    left: 12px;
    right: 12px;
    z-index: 95;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
    padding: 18px;
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    visibility: hidden;
    transform: translateY(-10px);
    transition: transform 0.3s ease, opacity 0.3s ease, max-height 0.35s ease, visibility 0s linear 0.35s;
    background: linear-gradient(165deg, rgba(13, 20, 36, 0.98), rgba(10, 14, 23, 0.98));
    border: 1px solid rgba(0, 229, 255, 0.18);
    border-radius: 20px;
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5), 0 0 40px rgba(157, 0, 255, 0.15);
  }

  .site-nav[data-open] {
    max-height: calc(100dvh - 96px);
    opacity: 1;
    transform: translateY(0);
    visibility: visible;
    overflow-y: auto;
    transition-delay: 0s;
  }

  .nav-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    width: 100%;
  }

  .nav-link {
    justify-content: flex-start;
    padding: 12px 14px;
    border-radius: 12px;
    border: 1px solid rgba(192, 192, 192, 0.14);
    background: rgba(0, 229, 255, 0.03);
  }

  .nav-link:hover {
    background: rgba(0, 229, 255, 0.09);
  }

  .nav-note {
    display: flex;
    align-items: center;
    gap: 8px;
    padding-top: 14px;
    border-top: 1px dashed rgba(192, 192, 192, 0.2);
    font-family: var(--font-data);
    font-size: 0.72rem;
    color: var(--c-text-dim);
  }

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

  [data-cols="4"], .grid-cols-4,
  [data-cols="3"], .grid-cols-3 {
    --cols: 2;
  }
}

@media (max-width: 600px) {
  [data-cols="2"], .grid-cols-2,
  [data-cols="3"], .grid-cols-3,
  [data-cols="4"], .grid-cols-4 {
    --cols: 1;
  }
}

@media (max-width: 560px) {
  .footer-top {
    grid-template-columns: 1fr;
  }

  .footer-brand {
    grid-column: auto;
  }
}

@media (max-width: 480px) {
  .nav-list {
    grid-template-columns: 1fr;
  }

  .brand-status-text {
    display: none;
  }

  .nav-toggle-label {
    display: none;
  }
}

@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;
  }

  .brand-status-dot {
    animation: none;
  }

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

  .site-nav,
  .site-nav[data-open] {
    transition: none;
  }

  .header-progress {
    transition: none;
  }
}