:root {
  --color-bg: #000000;
  --color-bg-rgb: 0, 0, 0;
  --color-panel: #0A0C0D;
  --color-panel-rgb: 10, 12, 13;
  --color-panel-raised: #121517;
  --color-line: #1F2629;
  --color-accent: #7DE8FF;
  --color-accent-rgb: 125, 232, 255;
  --color-accent-deep: #1493B4;
  --color-text: #E9EDEE;
  --color-text-muted: #8C9598;
  --color-success: #4BD68F;
  --color-warning: #E4C266;
  --color-error: #F27070;
  --color-flag-red: #C63B4A;
  --color-flag-blue: #2E4E8F;
  --color-flag-white: #E9EDEE;
  --color-flag-black: #000000;
  --color-transparent: transparent;
  --font-display: 'Inter', 'Noto Sans SC', -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Inter', 'Noto Sans SC', -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Consolas, 'Courier New', monospace;
  --radius-none: 0;
  --line-thin: 1px;
  --header-height: 68px;
  --content-max: 1120px;
  --header-max: 1408px;
  --gutter: clamp(16px, 4vw, 64px);
  --section-space: clamp(72px, 10vw, 144px);
  --transition-fast: 150ms ease;
  --transition-reveal: 650ms cubic-bezier(.2, .75, .25, 1);
  --landing-level: 66%;
}

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

html {
  min-width: 320px;
  scroll-behavior: smooth;
  background: var(--color-bg);
}

html.nav-open {
  overflow: hidden;
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: clip;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main,
section,
article,
aside,
header,
footer,
nav,
div {
  min-width: 0;
}

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

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

button,
input,
select,
textarea {
  color: inherit;
  font: inherit;
}

button {
  border: 0;
}

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

svg {
  flex-shrink: 0;
}

figure,
blockquote,
p,
h1,
h2,
h3,
h4,
ul,
ol,
dl,
dd,
pre {
  margin: 0;
}

ul,
ol {
  padding: 0;
}

ul[role="list"],
ol[role="list"],
.site-nav-list,
.footer-list {
  list-style: none;
}

.wrap {
  width: 100%;
  max-width: calc(var(--content-max) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.header-wrap {
  width: 100%;
  max-width: min(100%, calc(1280px + var(--gutter) * 2));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  position: relative;
  overflow-x: clip;
  padding-top: var(--section-space);
  padding-bottom: var(--section-space);
  border-top: var(--line-thin) solid var(--color-line);
}

.section-kicker,
.eyebrow,
.mono-label {
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.section-kicker,
.eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
}

.section-kicker::before,
.eyebrow::before {
  width: 2px;
  height: 13px;
  flex: 0 0 auto;
  content: "";
  background: linear-gradient(to bottom, rgba(var(--color-accent-rgb), .18), var(--color-accent));
}

h1,
h2,
h3,
h4 {
  color: var(--color-text);
  font-family: var(--font-display);
  font-weight: 400;
  text-wrap: balance;
}

h1,
.hero-title {
  font-size: clamp(34px, 3.5vw, 48px);
  line-height: 1.18;
  letter-spacing: -.01em;
}

h2 {
  font-size: clamp(28px, 3vw, 40px);
  line-height: 1.22;
}

h3 {
  font-size: clamp(20px, 2vw, 26px);
  line-height: 1.3;
}

h4 {
  font-size: 1rem;
  line-height: 1.4;
}

.title-nowrap {
  white-space: nowrap;
}

.accent-text {
  color: var(--color-accent);
}

.lede {
  max-width: 680px;
  color: var(--color-text-muted);
  font-size: clamp(16px, 1.6vw, 20px);
  line-height: 1.85;
}

.lede strong,
.prose strong {
  color: var(--color-text);
  font-weight: 500;
}

.prose {
  max-width: 800px;
  color: var(--color-text-muted);
}

.prose > * + * {
  margin-top: 1.25em;
}

.prose h2 {
  margin-top: 2.5em;
  color: var(--color-text);
}

.prose h3 {
  margin-top: 2em;
  color: var(--color-text);
}

.prose a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-color: rgba(var(--color-accent-rgb), .42);
  text-underline-offset: .22em;
}

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

.prose li + li {
  margin-top: .5em;
}

code,
kbd,
samp {
  font-family: var(--font-mono);
}

:not(pre) > code {
  overflow-wrap: anywhere;
  color: var(--color-accent);
}

pre {
  max-width: 100%;
  overflow-x: auto;
  padding: 20px;
  border: var(--line-thin) solid var(--color-line);
  background: var(--color-panel);
  color: var(--color-text);
  font: .875rem/1.75 var(--font-mono);
  -webkit-overflow-scrolling: touch;
}

pre code {
  white-space: pre;
}

.data-table,
table {
  width: 100%;
  border-collapse: collapse;
}

.prose > .data-table {
  display: block;
  max-width: 100%;
  min-width: 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

th,
td {
  min-width: 140px;
  padding: 15px 16px;
  border: var(--line-thin) solid var(--color-line);
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--color-panel-raised);
  color: var(--color-text);
  font: 500 .78rem/1.5 var(--font-mono);
  letter-spacing: .06em;
}

td {
  background: var(--color-bg);
  color: var(--color-text-muted);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.button {
  display: inline-flex;
  min-height: 46px;
  max-width: 100%;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 10px 24px;
  border: var(--line-thin) solid var(--color-line);
  border-radius: var(--radius-none);
  background: var(--color-panel);
  color: var(--color-text);
  font-size: .91rem;
  font-weight: 500;
  line-height: 1.3;
  cursor: pointer;
  transition: color var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.button svg {
  width: 15px;
  height: 15px;
}

.button:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-1px);
}

.button:focus-visible,
.site-nav-link:focus-visible,
.mobile-nav-link:focus-visible,
.language-button:focus-visible,
.menu-button:focus-visible {
  outline: var(--line-thin) solid var(--color-accent);
  outline-offset: 3px;
}

.button-primary {
  border-color: var(--color-text);
  background: var(--color-text);
  color: var(--color-bg);
}

.button-primary:hover {
  border-color: var(--color-accent);
  background: var(--color-accent);
  color: var(--color-bg);
}

.button-muted {
  color: var(--color-text-muted);
}

.button[disabled],
.button.is-disabled {
  border-color: var(--color-line);
  background: var(--color-panel);
  color: var(--color-text-muted);
  cursor: not-allowed;
  opacity: .58;
  transform: none;
}

.panel,
.card {
  border: var(--line-thin) solid var(--color-line);
  border-radius: var(--radius-none);
  background: var(--color-panel);
  color: var(--color-text);
}

.card {
  padding: clamp(20px, 3vw, 32px);
}

.card p {
  color: var(--color-text-muted);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  border: var(--line-thin) solid var(--color-line);
  background: var(--color-line);
}

.card-grid > * {
  min-width: 0;
  border: 0;
  background: var(--color-panel);
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.chip {
  display: inline-flex;
  max-width: 100%;
  min-height: 30px;
  align-items: center;
  gap: 8px;
  padding: 5px 10px;
  overflow: hidden;
  border: var(--line-thin) solid var(--color-line);
  background: rgba(var(--color-bg-rgb), .62);
  color: var(--color-text-muted);
  font: .72rem/1.4 var(--font-mono);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.chip-dot {
  width: 6px;
  height: 6px;
  flex: 0 0 auto;
  background: var(--color-success);
}

.site-header {
  position: relative;
  z-index: 50;
  height: var(--header-height);
  border-bottom: var(--line-thin) solid var(--color-line);
  background: var(--color-bg);
  color: var(--color-text);
}

.site-header-bar {
  position: relative;
  z-index: 53;
  display: flex;
  height: var(--header-height);
  align-items: center;
  gap: 28px;
}

.site-brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 11px;
  min-height: 44px;
}

.site-brand img {
  width: 28px;
  height: 28px;
  flex: 0 0 auto;
}

.site-brand-name {
  font-size: .97rem;
  font-weight: 500;
  letter-spacing: .01em;
}

.desktop-nav {
  min-width: 0;
}

.site-nav-list {
  display: flex;
  align-items: center;
  gap: 18px;
}

.site-nav-link {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: 7px;
  padding-inline: 2px;
  color: var(--color-text-muted);
  font-size: .84rem;
  transition: color var(--transition-fast);
}

.site-nav-link svg {
  width: 14px;
  height: 14px;
}

.site-nav-link:hover,
.site-nav-link.is-active {
  color: var(--color-text);
}

.site-nav-link.is-active svg {
  color: var(--color-accent);
}

.header-tools {
  position: relative;
  display: flex;
  margin-left: auto;
  align-items: center;
  gap: 8px;
}

.language-menu {
  position: relative;
}

.language-button,
.menu-button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border: var(--line-thin) solid var(--color-line);
  background: var(--color-bg);
  color: var(--color-text-muted);
  cursor: pointer;
}

.language-button {
  gap: 7px;
  padding-inline: 13px;
  font-size: .8rem;
  white-space: nowrap;
}

.language-button svg {
  width: 14px;
  height: 14px;
}

.language-short {
  display: none;
}

.language-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 60;
  display: none;
  width: 176px;
  border: var(--line-thin) solid var(--color-line);
  background: var(--color-panel);
}

.language-menu.is-open .language-dropdown {
  display: block;
}

.language-dropdown a {
  display: flex;
  width: 100%;
  min-height: 44px;
  align-items: center;
  padding: 10px 14px;
  color: var(--color-text-muted);
  font-size: .84rem;
}

.language-dropdown a:hover,
.language-dropdown a[aria-current="true"] {
  background: var(--color-panel-raised);
  color: var(--color-text);
}

.menu-button {
  display: none;
  width: 44px;
  padding: 0;
}

.menu-lines,
.menu-lines::before,
.menu-lines::after {
  display: block;
  width: 18px;
  height: 1px;
  background: var(--color-text);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.menu-lines {
  position: relative;
}

.menu-lines::before,
.menu-lines::after {
  position: absolute;
  left: 0;
  content: "";
}

.menu-lines::before {
  top: -6px;
}

.menu-lines::after {
  top: 6px;
}

.menu-button[aria-expanded="true"] .menu-lines {
  background: var(--color-transparent);
}

.menu-button[aria-expanded="true"] .menu-lines::before {
  transform: translateY(6px) rotate(45deg);
}

.menu-button[aria-expanded="true"] .menu-lines::after {
  transform: translateY(-6px) rotate(-45deg);
}

.mobile-veil {
  position: fixed;
  inset: var(--header-height) 0 0;
  z-index: 51;
  display: none;
  background: rgba(var(--color-bg-rgb), .78);
}

.mobile-drawer {
  position: fixed;
  top: var(--header-height);
  right: 0;
  left: 0;
  z-index: 52;
  display: none;
  max-height: calc(100dvh - var(--header-height));
  overflow-y: auto;
  border-bottom: var(--line-thin) solid var(--color-line);
  background: var(--color-panel);
  overscroll-behavior: contain;
}

.mobile-drawer.is-open,
.mobile-veil.is-open {
  display: block;
}

.mobile-nav-list {
  list-style: none;
}

.mobile-nav-link {
  display: flex;
  width: 100%;
  min-height: 48px;
  align-items: center;
  gap: 11px;
  padding: 12px var(--gutter);
  border-bottom: var(--line-thin) solid var(--color-line);
  color: var(--color-text-muted);
}

.mobile-nav-link svg {
  width: 16px;
  height: 16px;
}

.mobile-nav-link.is-active {
  color: var(--color-text);
}

.mobile-nav-link.is-active svg {
  color: var(--color-accent);
}

.mobile-language-title {
  padding: 18px var(--gutter) 8px;
  color: var(--color-text-muted);
  font: .7rem/1.4 var(--font-mono);
  letter-spacing: .12em;
}

.mobile-language-links a {
  display: flex;
  width: 100%;
  min-height: 46px;
  align-items: center;
  padding: 10px var(--gutter);
  color: var(--color-text-muted);
}

.mobile-language-links a[aria-current="true"] {
  color: var(--color-accent);
}

.site-footer {
  border-top: var(--line-thin) solid var(--color-line);
  background: var(--color-bg);
  color: var(--color-text);
}

.footer-main {
  display: grid;
  grid-template-columns: minmax(240px, 1.2fr) repeat(3, minmax(150px, 1fr));
  gap: clamp(30px, 5vw, 72px);
  padding-top: 72px;
  padding-bottom: 64px;
}

.footer-brand {
  max-width: 360px;
}

.footer-brand-line {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-brand-line img {
  width: 32px;
  height: 32px;
  flex: 0 0 auto;
}

.footer-brand-line strong {
  font-weight: 500;
}

.footer-brand p {
  margin-top: 18px;
  color: var(--color-text-muted);
  font-size: .9rem;
}

.footer-heading {
  margin-bottom: 15px;
  color: var(--color-text);
  font: .73rem/1.4 var(--font-mono);
  letter-spacing: .12em;
}

.footer-list li + li {
  margin-top: 7px;
}

.footer-list a {
  display: inline-flex;
  min-height: 30px;
  align-items: center;
  color: var(--color-text-muted);
  font-size: .88rem;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 24px;
  padding-top: 20px;
  padding-bottom: 24px;
  border-top: var(--line-thin) solid var(--color-line);
  color: var(--color-text-muted);
  font: .72rem/1.6 var(--font-mono);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  margin-left: auto;
}

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

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--transition-reveal), transform var(--transition-reveal);
}

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

.tilt,
.tilt-card {
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }

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

@media (max-width: 1120px) {
  .desktop-nav {
    display: none;
  }

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

  .menu-button {
    display: inline-flex;
  }
}

@media (max-width: 860px) {
  .card-grid,
  .footer-main {
    grid-template-columns: 1fr 1fr;
  }

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

@media (max-width: 640px) {
  :root {
    --gutter: 18px;
    --section-space: 72px;
  }

  h1,
  .hero-title {
    font-size: clamp(24px, 7vw, 30px);
    line-height: 1.2;
  }

  h2 {
    font-size: clamp(24px, 7vw, 30px);
  }

  .site-brand-name {
    font-size: .86rem;
  }

  .language-full {
    display: none;
  }

  .language-short {
    display: inline;
  }

  .language-button {
    padding-inline: 10px;
  }

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

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

  .footer-main {
    gap: 34px;
    padding-top: 54px;
    padding-bottom: 46px;
  }

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

  .footer-legal {
    margin-left: 0;
  }

  .button {
    min-height: 44px;
    padding-inline: 18px;
  }

  .tilt,
  .tilt-card {
    transform: none !important;
  }

  pre {
    padding: 16px;
  }

  th,
  td {
    padding: 12px;
  }
}