:root {
  --bg-deep: #071022;
  --bg-main: #0A1628;
  --bg-panel: #0F2540;
  --bg-light: #F4F7FB;
  --accent: #39FF88;
  --accent-cool: #00D4FF;
  --alert: #FF5B3A;
  --text-main: #F4F7FB;
  --text-body: #C7D4E5;
  --text-soft: #B7C6D9;
  --text-dim: #8FA3BF;
  --ink: #0A1628;
  --line: rgba(0, 212, 255, 0.14);
  --font-heading: "Noto Sans SC", "DIN Alternate", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "Roboto Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --radius-lg: 28px;
  --radius-pill: 999px;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.32);
  --container: 1180px;
  --header-top: 12px;
}

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

html {
  scroll-behavior: smooth;
  background-color: var(--bg-deep);
}

body {
  margin: 0;
  padding-top: 96px;
  background-color: var(--bg-deep);
  background-image:
    radial-gradient(1100px 520px at 85% -10%, rgba(0, 212, 255, 0.14), transparent 60%),
    radial-gradient(900px 520px at -10% 35%, rgba(57, 255, 136, 0.07), transparent 55%);
  color: var(--text-body);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

main {
  display: block;
}

#main-content {
  scroll-margin-top: 104px;
}

img,
figure {
  max-width: 100%;
}

img {
  display: block;
  height: auto;
}

a {
  color: var(--accent-cool);
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

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

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0 0 0.5em;
  color: var(--text-main);
  font-family: var(--font-heading);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2rem, 4.5vw, 3.5rem);
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2.5rem);
}

h3 {
  font-size: 1.375rem;
}

h4 {
  font-size: 1.125rem;
}

p {
  margin: 0 0 1em;
}

ul,
ol {
  padding-left: 1.2em;
  margin: 0 0 1em;
}

li + li {
  margin-top: 4px;
}

::selection {
  background: var(--accent);
  color: var(--ink);
}

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
  border-radius: 6px;
}

.screen-reader-text {
  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: var(--header-top);
  left: 50%;
  z-index: 2000;
  padding: 12px 20px;
  border-radius: var(--radius-pill);
  background: linear-gradient(135deg, var(--accent), var(--accent-cool));
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
  box-shadow: 0 12px 32px rgba(57, 255, 136, 0.35);
  transform: translateX(-50%) translateY(-160%);
  transition: transform 0.2s ease;
}

.skip-link:focus {
  transform: translateX(-50%) translateY(0);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1200;
  pointer-events: none;
}

.site-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 2200;
  background: rgba(255, 255, 255, 0.04);
  pointer-events: none;
}

.site-progress span {
  display: block;
  height: 100%;
  width: 0;
  border-radius: 0 999px 999px 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-cool));
  box-shadow: 0 0 14px rgba(57, 255, 136, 0.7);
}

.header-shell {
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 10px 12px 10px 18px;
  border: 1px solid rgba(0, 212, 255, 0.16);
  border-radius: var(--radius-pill);
  background: rgba(7, 16, 34, 0.78);
  box-shadow:
    0 16px 50px rgba(0, 0, 0, 0.42),
    0 0 0 1px rgba(57, 255, 136, 0.04);
  backdrop-filter: blur(18px) saturate(1.2);
  -webkit-backdrop-filter: blur(18px) saturate(1.2);
  pointer-events: auto;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  color: var(--text-main);
  text-decoration: none;
}

.brand-mark {
  position: relative;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, var(--accent), rgba(0, 212, 255, 0.5));
  box-shadow: 0 0 18px rgba(57, 255, 136, 0.28);
}

.brand-mark::after {
  content: "";
  position: absolute;
  inset: 7px;
  border-radius: inherit;
  border: 2px solid var(--ink);
  border-left-color: transparent;
  transform: rotate(45deg);
}

.brand-name {
  color: var(--text-main);
  font-size: 1.0625rem;
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.brand-name strong {
  color: var(--accent);
  font-weight: 900;
}

.site-nav {
  flex: 1;
  display: flex;
  justify-content: center;
  min-width: 0;
}

.nav-list {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-link {
  display: block;
  padding: 8px 11px;
  border-radius: var(--radius-pill);
  color: var(--text-soft);
  font-weight: 600;
  font-size: 0.9375rem;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.25s ease, color 0.25s ease;
}

.nav-link:hover {
  color: var(--accent);
  background: rgba(57, 255, 136, 0.08);
}

.nav-link[aria-current="page"] {
  color: var(--accent);
  background: linear-gradient(135deg, rgba(57, 255, 136, 0.14), rgba(0, 212, 255, 0.14));
  box-shadow: inset 0 0 0 1px rgba(57, 255, 136, 0.24);
}

.header-cta {
  flex: 0 0 auto;
  margin-left: 12px;
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  background: linear-gradient(135deg, var(--accent), var(--accent-cool));
  color: var(--ink);
  font-weight: 800;
  font-size: 0.9375rem;
  text-decoration: none;
  box-shadow: 0 8px 24px rgba(57, 255, 136, 0.28);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.header-cta:hover {
  color: var(--ink);
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(57, 255, 136, 0.4);
}

.header-cta:active {
  transform: translateY(0);
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid rgba(0, 212, 255, 0.16);
  border-radius: var(--radius-pill);
  background: rgba(0, 212, 255, 0.08);
  color: var(--text-main);
  cursor: pointer;
  transition: background 0.25s ease, border-color 0.25s ease;
}

.nav-toggle:hover {
  background: rgba(0, 212, 255, 0.16);
}

.nav-toggle-icon {
  display: block;
  width: 20px;
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--text-main);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle-bar + .nav-toggle-bar {
  margin-top: 5px;
}

.site-header[data-open] .nav-toggle {
  border-color: rgba(57, 255, 136, 0.4);
}

.site-header[data-open] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.site-header[data-open] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.site-header[data-open] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.footer {
  position: relative;
  margin-top: 80px;
  overflow: hidden;
  background: linear-gradient(180deg, var(--bg-main) 0%, var(--bg-deep) 48%, #040912 100%);
  color: var(--text-body);
  border-top: 1px solid rgba(0, 212, 255, 0.14);
}

.footer::before {
  content: "";
  position: absolute;
  top: -80px;
  right: 10%;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.18), transparent 62%);
  pointer-events: none;
}

.footer::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(57, 255, 136, 0.5), rgba(0, 212, 255, 0.5), transparent);
  pointer-events: none;
}

.footer-shell {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.4fr 0.7fr 1.3fr;
  gap: 48px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 64px 24px 40px;
}

.footer-about p {
  margin-top: 16px;
  max-width: 360px;
  color: var(--text-soft);
}

.footer-block {
  min-width: 0;
}

.footer-title {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.footer-links {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-links a {
  display: inline-block;
  color: var(--text-soft);
  text-decoration: none;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

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

.footer-contact {
  display: grid;
  gap: 4px;
  margin-top: 18px;
  font-style: normal;
  color: var(--text-soft);
  font-size: 0.875rem;
  line-height: 1.6;
}

.footer-meta {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 20px 24px 32px;
  border-top: 1px solid rgba(0, 212, 255, 0.12);
  color: var(--text-dim);
  font-size: 0.875rem;
}

.footer-meta p {
  margin: 0;
}

.footer-meta a {
  color: var(--text-dim);
  text-decoration: none;
}

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

.container {
  width: min(var(--container), calc(100% - 32px));
  margin-inline: auto;
}

.section {
  padding-block: 64px;
  scroll-margin-top: 104px;
}

.section-deep {
  background: linear-gradient(180deg, var(--bg-main), var(--bg-deep));
}

.section-light {
  background: var(--bg-light);
  color: #44546A;
}

.section-light h1,
.section-light h2,
.section-light h3,
.section-light h4,
.section-light .page-title {
  color: var(--ink);
}

.section-light p {
  color: #44546A;
}

.panel {
  background: linear-gradient(160deg, rgba(15, 37, 64, 0.9), rgba(7, 16, 34, 0.92));
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow);
}

.panel > :last-child,
.card > :last-child {
  margin-bottom: 0;
}

.grid {
  display: grid;
  gap: 24px;
  margin: 0 0 32px;
}

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

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

.card {
  background: linear-gradient(160deg, rgba(15, 37, 64, 0.9), rgba(10, 22, 40, 0.94));
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.card:hover {
  border-color: rgba(0, 212, 255, 0.28);
  transform: translateY(-3px);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border: 0;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-weight: 800;
  font-size: 0.9375rem;
  line-height: 1.4;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-cool));
  color: var(--ink);
  box-shadow: 0 8px 24px rgba(57, 255, 136, 0.24);
}

.btn-primary:hover {
  color: var(--ink);
  box-shadow: 0 12px 32px rgba(57, 255, 136, 0.34);
}

.btn-outline {
  background: transparent;
  border: 1px solid rgba(0, 212, 255, 0.4);
  color: var(--text-main);
}

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

.page-title {
  margin-bottom: 0.4em;
  font-size: clamp(2.25rem, 5vw, 4rem);
  letter-spacing: -0.03em;
}

.lede {
  max-width: 640px;
  font-size: clamp(1.0625rem, 2vw, 1.25rem);
  color: var(--text-soft);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
}

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

.breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--text-dim);
}

.breadcrumb a {
  color: var(--accent-cool);
  text-decoration: none;
}

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

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

.media-frame {
  position: relative;
  display: block;
  width: 100%;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--bg-panel), var(--bg-deep));
  aspect-ratio: 16 / 7;
}

.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 70% 30%, rgba(0, 212, 255, 0.3), transparent 55%),
    radial-gradient(circle at 20% 80%, rgba(57, 255, 136, 0.16), transparent 50%);
  opacity: 0.7;
}

.media-frame::after {
  content: attr(data-label);
  position: absolute;
  left: 16px;
  bottom: 12px;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background: rgba(7, 16, 34, 0.7);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
}

.media-frame-wide {
  aspect-ratio: 16 / 5;
}

.media-frame-square {
  aspect-ratio: 1 / 1;
}

.ticker {
  overflow: hidden;
  background: var(--bg-panel);
  border-block: 1px solid var(--line);
}

.ticker-track {
  display: flex;
  gap: 48px;
  width: max-content;
  padding: 12px 0;
  animation: ticker-scroll 36s linear infinite;
}

.ticker:hover .ticker-track {
  animation-play-state: paused;
}

.ticker-item {
  display: flex;
  align-items: center;
  gap: 10px;
  white-space: nowrap;
  color: var(--text-soft);
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

.ticker-item strong {
  color: var(--accent);
}

.ticker-item::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-cool);
  box-shadow: 0 0 10px rgba(0, 212, 255, 0.8);
}

@keyframes ticker-scroll {
  to {
    transform: translateX(-50%);
  }
}

@media (max-width: 991px) {
  body {
    padding-top: 82px;
  }

  .site-header {
    top: 8px;
  }

  .header-shell {
    padding: 8px 12px;
    border-radius: 28px;
  }

  .site-nav {
    position: fixed;
    top: 64px;
    left: 12px;
    right: 12px;
    display: block;
    flex: none;
    margin: 0;
    padding: 12px;
    border: 1px solid rgba(0, 212, 255, 0.16);
    border-radius: 24px;
    background: rgba(7, 16, 34, 0.96);
    box-shadow: var(--shadow);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    visibility: hidden;
    opacity: 0;
    transform: translateY(-10px);
    transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
  }

  .site-header[data-open] .site-nav {
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .nav-link {
    padding: 14px 16px;
    font-size: 1.0625rem;
    text-align: center;
  }

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

  .header-cta {
    margin-left: auto;
    padding: 8px 14px;
    font-size: 0.875rem;
  }

  .footer-shell {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }

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

  .grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (max-width: 560px) {
  .section {
    padding-block: 40px;
  }

  .container {
    width: min(100% - 24px, var(--container));
  }

  .brand-name {
    font-size: 0.9375rem;
  }

  .brand-mark {
    width: 30px;
    height: 30px;
  }

  .footer-shell {
    grid-template-columns: minmax(0, 1fr);
    padding-top: 48px;
  }

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

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

  .grid-3,
  .grid-2 {
    grid-template-columns: minmax(0, 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;
  }

  .ticker-track {
    width: auto;
    overflow-x: auto;
    animation: none;
  }
}