:root {
  --bg-night: #0A0E17;
  --bg-carbon: #111622;
  --bg-glass: rgba(255, 255, 255, 0.08);
  --line-blue: #00D8FF;
  --line-green: #00FFA3;
  --gold: #F7B500;
  --gold-light: #FFD75E;
  --red: #FF4D5E;
  --white: #F2F6FA;
  --muted: #7C8EA6;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
  --font-display: "Arial Black", "DIN Alternate", var(--font-sans);
  --font-mono: "SFMono-Regular", "Roboto Mono", "Cascadia Code", Consolas, monospace;
  --container: 1400px;
  --space-xs: 0.375rem;
  --space-sm: 0.75rem;
  --space-md: 1.5rem;
  --space-lg: 3rem;
  --space-xl: 6rem;
  --radius-sm: 4px;
  --radius-md: 10px;
  --radius-lg: 18px;
  --t-fast: 0.25s;
  --t-base: 0.4s;
  --header-h: auto;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  background-color: var(--bg-night);
  color: var(--white);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--line-blue);
  text-decoration: none;
  transition: color var(--t-fast) ease;
}

a:hover {
  color: var(--line-green);
}

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

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

::selection {
  background: var(--line-blue);
  color: var(--bg-night);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 3000;
  padding: 12px 20px;
  background: var(--line-green);
  color: var(--bg-night);
  font-weight: 700;
  border-radius: var(--radius-sm);
  transition: top var(--t-fast) ease;
}

.skip-link:focus {
  top: 12px;
  color: var(--bg-night);
}

.shell {
  width: min(var(--container), 100% - 48px);
  margin-inline: auto;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.25;
  background-image:
    linear-gradient(rgba(0, 216, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 216, 255, 0.03) 1px, transparent 1px);
  background-size: 44px 44px;
}

#main-content {
  position: relative;
  z-index: 1;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(10, 14, 23, 0.88);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(0, 216, 255, 0.15);
}

.header-topbar {
  background: var(--bg-carbon);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 0.8rem;
}

.header-topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 34px;
  gap: var(--space-md);
}

.header-topbar-tagline {
  color: var(--muted);
  letter-spacing: 0.06em;
}

.header-topbar-tagline::before {
  content: "◇";
  color: var(--gold);
  margin-right: 8px;
}

.header-meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.header-support {
  color: var(--muted);
  font-weight: 500;
  font-size: 0.8rem;
  transition: color var(--t-fast) ease;
}

.header-support:hover {
  color: var(--line-green);
}

.header-main-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  min-height: 76px;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--white);
  flex-shrink: 0;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 52px;
  height: 46px;
  padding-inline: 8px;
  background: linear-gradient(135deg, var(--line-blue), var(--line-green));
  color: var(--bg-night);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.3rem;
  line-height: 1;
  border-radius: var(--radius-sm);
  transform: skewX(-10deg);
  flex-shrink: 0;
}

.brand-logo + .brand-name {
  transform: skewX(0deg);
}

.brand-name {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1.2;
  display: flex;
  flex-direction: column;
}

.brand-name small {
  font-size: 0.72rem;
  font-family: var(--font-sans);
  font-weight: 400;
  color: var(--muted);
  letter-spacing: 0.04em;
  margin-top: 2px;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border: 1px solid rgba(0, 216, 255, 0.3);
  border-radius: var(--radius-sm);
  background: var(--bg-glass);
  cursor: pointer;
  position: relative;
  z-index: 260;
}

.nav-toggle-line {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--line-blue);
  transition: transform var(--t-fast) ease, opacity var(--t-fast) ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.site-nav {
  display: flex;
  align-items: stretch;
  gap: 2px;
}

.site-nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 10px 22px;
  font-weight: 600;
  font-size: 1rem;
  color: var(--white);
  letter-spacing: 0.02em;
  transition: color var(--t-fast) ease, background var(--t-fast) ease;
}

.site-nav a::before {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 4px;
  height: 2px;
  background: linear-gradient(90deg, var(--line-green), var(--gold));
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform var(--t-fast) ease;
}

.site-nav a:hover {
  color: var(--line-green);
}

.site-nav a:hover::before {
  transform: scaleX(1);
}

.site-nav a[aria-current="page"] {
  color: var(--line-blue);
}

.site-nav a[aria-current="page"]::before {
  background: var(--line-blue);
  transform: scaleX(1);
}

.site-footer {
  position: relative;
  z-index: 1;
  background: var(--bg-carbon);
  border-top: 1px solid rgba(0, 216, 255, 0.2);
  padding-top: var(--space-xl);
  margin-top: var(--space-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
  gap: var(--space-xl);
  padding-bottom: var(--space-xl);
}

.footer-brand-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.footer-brand-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  height: 40px;
  padding-inline: 6px;
  background: linear-gradient(135deg, var(--line-green), var(--line-blue));
  color: var(--bg-night);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1rem;
  border-radius: var(--radius-sm);
  transform: skewX(-10deg);
}

.footer-brand-name {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--white);
  letter-spacing: 0.04em;
}

.footer-summary {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.8;
  margin-bottom: var(--space-md);
}

.footer-trust {
  color: rgba(124, 142, 166, 0.78);
  font-size: 0.82rem;
  line-height: 1.7;
  border-left: 2px solid var(--gold);
  padding-left: var(--space-md);
}

.footer-col-title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 0.06em;
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-col-title::after {
  content: "";
  height: 2px;
  width: 28px;
  background: var(--line-blue);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: var(--muted);
  font-size: 0.95rem;
  padding: 2px 0;
  transition: color var(--t-fast) ease, padding-left var(--t-fast) ease;
}

.footer-links a:hover {
  color: var(--line-green);
  padding-left: 6px;
}

.footer-links a::before {
  content: "▶";
  font-size: 0.7rem;
  color: var(--line-blue);
  margin-right: 8px;
  vertical-align: 1px;
}

.footer-contact {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-contact li {
  display: flex;
  gap: 8px;
}

.footer-contact a {
  color: var(--muted);
}

.footer-contact a:hover {
  color: var(--white);
}

.footer-contact-col {
  background: rgba(255, 255, 255, 0.04);
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-block: var(--space-md);
}

.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.footer-copy,
.footer-icp {
  color: rgba(124, 142, 166, 0.8);
  font-size: 0.82rem;
}

.footer-icp a {
  color: var(--muted);
}

.footer-icp a:hover {
  color: var(--line-green);
}

.section-head {
  display: grid;
  grid-template-columns: 1fr 1.4fr 1fr;
  align-items: end;
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.section-index {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--gold);
  background: rgba(247, 181, 0, 0.1);
  border: 1px solid rgba(247, 181, 0, 0.3);
  border-radius: 30px;
  display: inline-block;
  padding: 6px 18px;
  transform: skewX(-8deg);
  justify-self: start;
  letter-spacing: 0.1em;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 3.4rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.section-title-accent {
  background: linear-gradient(90deg, var(--line-blue), var(--line-green));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.section-desc {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.8;
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-sm);
  transition: transform var(--t-fast) ease, box-shadow var(--t-fast) ease, background var(--t-fast) ease, color var(--t-fast) ease;
  transform: skewX(-6deg);
  cursor: pointer;
  line-height: 1.4;
  border: 1px solid transparent;
}

.btn > * {
  transform: skewX(6deg);
}

.btn-primary {
  background: var(--line-blue);
  color: var(--bg-night);
  box-shadow: 0 0 22px rgba(0, 216, 255, 0.2);
}

.btn-primary:hover {
  background: var(--line-green);
  color: var(--bg-night);
  box-shadow: 0 0 30px rgba(0, 255, 163, 0.3);
  transform: skewX(-6deg) translateY(-2px);
}

.btn-ghost {
  background: transparent;
  color: var(--white);
  border-color: rgba(0, 216, 255, 0.5);
}

.btn-ghost:hover {
  border-color: var(--line-green);
  color: var(--line-green);
  transform: skewX(-6deg) translateY(-2px);
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: var(--space-md) 0;
  color: var(--muted);
  font-size: 0.88rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  margin-bottom: var(--space-lg);
}

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

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

.breadcrumb .breadcrumb-current {
  color: var(--line-blue);
}

.breadcrumb-sep {
  color: rgba(124, 142, 166, 0.4);
  font-size: 0.7rem;
}

.page-hero {
  position: relative;
  padding: var(--space-xl) 0 var(--space-lg);
  border-bottom: 1px solid rgba(0, 216, 255, 0.12);
}

.page-hero-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 4.5rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-md);
}

.page-hero-title em {
  font-style: normal;
  color: var(--line-green);
}

.page-hero-desc {
  max-width: 640px;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.9;
}

.prose {
  max-width: 760px;
  color: rgba(242, 246, 250, 0.86);
  font-size: 1rem;
  line-height: 1.9;
}

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

.prose h2 {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 800;
  margin: 2em 0 0.8em;
  letter-spacing: -0.01em;
}

.prose h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin: 1.8em 0 0.6em;
  color: var(--line-blue);
}

.prose ul,
.prose ol {
  margin: 1em 0 1.5em;
  padding-left: 1.4em;
}

.prose li {
  margin-bottom: 0.5em;
}

.prose blockquote {
  border-left: 3px solid var(--gold);
  padding: var(--space-sm) var(--space-md);
  background: rgba(247, 181, 0, 0.06);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: var(--space-md) 0;
  color: rgba(242, 246, 250, 0.75);
}

.prose strong {
  color: var(--white);
  font-weight: 700;
}

.prose a {
  color: var(--line-blue);
  border-bottom: 1px solid rgba(0, 216, 255, 0.3);
}

.prose a:hover {
  color: var(--line-green);
  border-bottom-color: var(--line-green);
}

.surface-card {
  background: linear-gradient(145deg, rgba(255,255,255,0.10), rgba(255,255,255,0.03));
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: border-color var(--t-fast) ease, box-shadow var(--t-fast) ease, transform var(--t-fast) ease;
}

.surface-card:hover {
  border-color: rgba(0, 216, 255, 0.4);
  box-shadow: 0 0 40px rgba(0, 216, 255, 0.08);
  transform: translateY(-3px);
}

.data-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-md);
  padding: 10px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.data-label {
  color: var(--muted);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
}

.data-value {
  font-family: var(--font-mono);
  color: var(--white);
  font-weight: 700;
  font-size: 1.05rem;
}

.data-value.green {
  color: var(--line-green);
}

.data-value.blue {
  color: var(--line-blue);
}

.data-value.gold {
  color: var(--gold);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 30px;
  font-size: 0.78rem;
  font-weight: 600;
  border: 1px solid rgba(0, 216, 255, 0.3);
  color: var(--line-blue);
  background: rgba(0, 216, 255, 0.06);
}

.tag.gold {
  border-color: rgba(247, 181, 0, 0.35);
  color: var(--gold);
  background: rgba(247, 181, 0, 0.08);
}

.tag.green {
  border-color: rgba(0, 255, 163, 0.3);
  color: var(--line-green);
  background: rgba(0, 255, 163, 0.06);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.marquee-bar {
  background: var(--bg-carbon);
  border-block: 1px solid rgba(0, 255, 163, 0.15);
  overflow: hidden;
  padding-block: 14px;
  position: relative;
  z-index: 1;
  transform: skewY(-1.6deg);
  margin-block: var(--space-lg) var(--space-xl);
}

.marquee-track {
  display: flex;
  gap: 0;
  width: max-content;
  animation: marquee-scroll 42s linear infinite;
  will-change: transform;
}

.marquee-track span {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--line-green);
  white-space: nowrap;
  padding-inline: 20px;
  letter-spacing: 0.1em;
}

.marquee-track span::before {
  content: "●";
  color: var(--gold);
  margin-right: 40px;
  font-size: 0.5rem;
  vertical-align: 3px;
}

@keyframes marquee-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

.img-frame {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-carbon);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.img-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0, 216, 255, 0.06), rgba(0, 255, 163, 0.03));
  pointer-events: none;
}

.img-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--t-base) ease;
}

.img-frame:hover img {
  transform: scale(1.04);
}

.img-frame-16-9 {
  aspect-ratio: 16 / 9;
}

.img-frame-4-3 {
  aspect-ratio: 4 / 3;
}

.img-frame-1-1 {
  aspect-ratio: 1 / 1;
}

@media (max-width: 1100px) {
  .header-main-inner {
    gap: var(--space-md);
  }

  .site-nav a {
    padding: 10px 14px;
  }

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

  .footer-contact-col {
    grid-column: span 2;
  }

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

@media (max-width: 780px) {
  .header-topbar-inner {
    flex-direction: column;
    gap: 2px;
    padding-block: 8px;
  }

  .header-main-inner {
    min-height: 70px;
  }

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

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    background: rgba(10, 14, 23, 0.96);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 0 24px 24px;
    border-bottom: 2px solid var(--line-blue);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-16px);
    pointer-events: none;
    transition: opacity var(--t-fast) ease, transform var(--t-fast) ease, visibility var(--t-fast) ease;
  }

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

  .site-nav a {
    padding: 16px 6px;
    font-size: 1.06rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }

  .site-nav a::before {
    left: 0;
    right: auto;
    width: 3px;
    height: 28px;
    bottom: 50%;
    transform: translateY(50%) scaleY(0);
  }

  .site-nav a:hover::before,
  .site-nav a[aria-current="page"]::before {
    transform: translateY(50%) scaleY(1);
  }

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

  .footer-contact-col {
    grid-column: span 1;
  }

  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .section-head {
    grid-template-columns: 1fr;
    gap: var(--space-sm);
  }

  .pagetoolbar-wrap {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
  }

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

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