:root {
  --color-canvas: #FFFFFF;
  --color-surface: #F3F4F6;
  --color-ink: #101013;
  --color-ink-raised: #17171B;
  --color-line: #E2E4E8;
  --color-signal: #FFD400;
  --color-signal-deep: #D9B300;
  --color-text: #101013;
  --color-text-soft: #5A5E66;
  --color-positive: #1FA65A;
  --color-warning: #E8700A;
  --color-negative: #E23D2E;
  --color-dark-text: #EDEEF0;
  --color-dark-soft: #8A8E96;
  --color-dark-line: #26262C;
  --color-dark-dot: #1F1F25;
  --color-dark-faint: #3A3A41;
  --color-flag-red: #C6392E;
  --color-flag-blue: #2E4C8F;
  --color-focus: #FFD400;
  --color-overlay: rgb(16 16 19 / 54%);
  --color-shadow: rgb(16 16 19 / 14%);
  --color-shadow-strong: rgb(16 16 19 / 22%);
  --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', 'SFMono-Regular', Consolas, 'Liberation Mono', monospace;
  --radius-xs: 6px;
  --radius-sm: 8px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-pill: 999px;
  --header-height: 68px;
  --gutter: clamp(16px, 4vw, 48px);
  --content-width: 1200px;
  --reading-width: 780px;
  --section-space: clamp(72px, 9vw, 128px);
  --focus-ring: 2px solid var(--color-focus);
  --shadow-card: 0 14px 38px var(--color-shadow);
  --shadow-lift: 0 22px 58px var(--color-shadow-strong);
  --transition-fast: 150ms ease;
  --transition-enter: 620ms cubic-bezier(.22, 1, .36, 1);
}

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

html {
  background: var(--color-canvas);
  color: var(--color-text);
  font-family: var(--font-body);
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 16px);
  text-size-adjust: 100%;
}

html.nav-open {
  overflow: hidden;
}

body {
  min-width: 320px;
  margin: 0;
  background: var(--color-canvas);
  color: var(--color-text);
  font-family: var(--font-body);
  line-height: 1.65;
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
}

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

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

img {
  height: auto;
}

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

button,
summary {
  cursor: pointer;
}

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

p,
h1,
h2,
h3,
h4,
ul,
ol,
blockquote,
figure {
  margin-top: 0;
}

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

h1 {
  margin-bottom: 22px;
  font-size: clamp(52px, 5.2vw, 72px);
  font-weight: 900;
  letter-spacing: -.02em;
  line-height: 1.1;
}

h2 {
  margin-bottom: 20px;
  font-size: clamp(34px, 4vw, 52px);
  font-weight: 850;
  letter-spacing: -.018em;
  line-height: 1.14;
}

h3 {
  margin-bottom: 14px;
  font-size: clamp(22px, 2.2vw, 30px);
  font-weight: 800;
  line-height: 1.25;
}

h4 {
  margin-bottom: 10px;
  font-size: 18px;
  font-weight: 750;
}

p {
  margin-bottom: 1em;
}

ul,
ol {
  padding-left: 1.35em;
}

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

code {
  overflow-wrap: anywhere;
}

pre {
  max-width: 100%;
  padding: 20px;
  overflow-x: auto;
  border: 1px solid var(--color-dark-line);
  border-radius: var(--radius-md);
  background: var(--color-ink);
  color: var(--color-dark-text);
  line-height: 1.65;
  -webkit-overflow-scrolling: touch;
}

::selection {
  background: var(--color-signal);
  color: var(--color-text);
}

:where(a, button, summary, input, select, textarea, [role="tab"]):focus-visible {
  outline: var(--focus-ring);
  outline-offset: 3px;
}

.no-break {
  white-space: nowrap;
}

.mono {
  font-family: var(--font-mono);
}

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

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

.section {
  padding-top: var(--section-space);
  padding-bottom: var(--section-space);
}

.section-compact {
  padding-top: clamp(48px, 6vw, 80px);
  padding-bottom: clamp(48px, 6vw, 80px);
}

.section-dark {
  background: var(--color-ink);
  color: var(--color-dark-text);
}

.section-dark h2,
.section-dark h3,
.section-dark h4 {
  color: var(--color-dark-text);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  max-width: 100%;
  margin-bottom: 18px;
  padding: 7px 14px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  color: var(--color-text-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .07em;
}

.eyebrow::before {
  width: 7px;
  height: 7px;
  flex: none;
  border-radius: 50%;
  background: var(--color-positive);
  content: "";
}

.lead {
  max-width: 720px;
  color: var(--color-text-soft);
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.7;
}

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

.btn,
.btn-primary,
.btn-secondary,
.btn-dark,
.btn-small {
  display: inline-flex;
  min-width: 24px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  font-weight: 750;
  line-height: 1.15;
  text-align: center;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), opacity var(--transition-fast), transform var(--transition-fast);
}

.btn,
.btn-primary,
.btn-secondary,
.btn-dark {
  padding: 14px 28px;
  font-size: 16px;
}

.btn-small {
  min-height: 38px;
  padding: 9px 16px;
  font-size: 14px;
}

.btn-primary {
  background: var(--color-signal);
  box-shadow: 0 2px 0 var(--color-shadow);
  color: var(--color-text);
}

.btn-primary:hover {
  background: var(--color-signal-deep);
  transform: translateY(-1px);
}

.btn-secondary {
  border-color: var(--color-text);
  background: var(--color-canvas);
  color: var(--color-text);
}

.btn-secondary:hover {
  background: var(--color-surface);
}

.btn-dark {
  background: var(--color-ink);
  color: var(--color-canvas);
}

.btn-dark:hover {
  opacity: .84;
}

.btn[aria-disabled="true"],
.btn:disabled {
  cursor: not-allowed;
  opacity: .48;
  transform: none;
}

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

.card,
.panel {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-canvas);
}

.card {
  padding: clamp(22px, 3vw, 34px);
  box-shadow: var(--shadow-card);
}

.panel {
  padding: clamp(22px, 3vw, 38px);
  background: var(--color-surface);
}

.badge,
.tag,
.fact-pill {
  display: inline-flex;
  max-width: 100%;
  min-height: 28px;
  align-items: center;
  gap: 7px;
  padding: 5px 11px;
  overflow: hidden;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.35;
}

.badge {
  background: var(--color-signal);
  color: var(--color-text);
}

.tag {
  border: 1px solid var(--color-line);
  background: var(--color-surface);
  color: var(--color-text-soft);
}

.fact-pill {
  border: 1px solid var(--color-dark-line);
  background: var(--color-ink-raised);
  color: var(--color-dark-text);
  font-family: var(--font-mono);
}

.reveal {
  transition: opacity var(--transition-enter), transform var(--transition-enter);
}

.reveal.pending {
  opacity: 0;
  transform: translateY(16px);
}

.reveal.shown {
  opacity: 1;
  transform: translateY(0);
}

.site-header {
  position: relative;
  z-index: 80;
  height: var(--header-height);
  border-bottom: 1px solid var(--color-line);
  background: var(--color-canvas);
}

.header-shell {
  display: flex;
  width: 100%;
  height: 100%;
  align-items: center;
  gap: 28px;
  padding-inline: var(--gutter);
}

.site-brand {
  display: inline-flex;
  min-height: 44px;
  flex: none;
  align-items: center;
  gap: 9px;
}

.site-brand img {
  width: 27px;
  height: 27px;
}

.brand-word {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 850;
  letter-spacing: -.01em;
}

.brand-local {
  color: var(--color-text-soft);
  font-size: 13px;
  font-weight: 600;
}

.desktop-nav {
  display: flex;
  flex: 1;
  align-items: center;
  gap: 2px;
}

.desktop-nav a {
  display: inline-flex;
  min-height: 36px;
  align-items: center;
  padding: 7px 12px;
  border-radius: var(--radius-pill);
  color: var(--color-text-soft);
  font-size: 13.5px;
  white-space: nowrap;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.desktop-nav a:hover {
  color: var(--color-text);
}

.desktop-nav a.is-active {
  background: var(--color-ink);
  color: var(--color-canvas);
  font-weight: 700;
}

.header-tools {
  display: flex;
  flex: none;
  align-items: center;
  gap: 10px;
}

.language-menu {
  position: relative;
}

.language-button {
  display: inline-flex;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border: 0;
  background: transparent;
  color: var(--color-text-soft);
  font-size: 13px;
}

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

.language-popover {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 90;
  display: none;
  width: 170px;
  padding: 7px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-canvas);
  box-shadow: var(--shadow-card);
}

.language-menu.is-open .language-popover {
  display: grid;
}

.language-popover a {
  display: flex;
  min-height: 42px;
  align-items: center;
  padding: 8px 11px;
  border-radius: var(--radius-sm);
  color: var(--color-text-soft);
  font-size: 14px;
}

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

.header-login {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  justify-content: center;
  padding: 9px 20px;
  border-radius: var(--radius-md);
  background: var(--color-ink);
  color: var(--color-canvas);
  font-size: 13.5px;
  font-weight: 700;
}

.menu-toggle {
  display: none;
  min-width: 44px;
  min-height: 44px;
  padding: 10px;
  border: 0;
  background: transparent;
}

.menu-toggle-lines,
.menu-toggle-lines::before,
.menu-toggle-lines::after {
  display: block;
  width: 22px;
  height: 2px;
  border-radius: var(--radius-pill);
  background: var(--color-text);
  content: "";
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.menu-toggle-lines {
  position: relative;
}

.menu-toggle-lines::before {
  position: absolute;
  top: -7px;
}

.menu-toggle-lines::after {
  position: absolute;
  top: 7px;
}

.menu-toggle[aria-expanded="true"] .menu-toggle-lines {
  background: transparent;
}

.menu-toggle[aria-expanded="true"] .menu-toggle-lines::before {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] .menu-toggle-lines::after {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-nav {
  position: fixed;
  top: var(--header-height);
  right: 0;
  left: 0;
  z-index: 85;
  display: none;
  max-height: calc(100dvh - var(--header-height));
  padding: 10px var(--gutter) 24px;
  overflow-y: auto;
  border-top: 1px solid var(--color-line);
  background: var(--color-canvas);
  overscroll-behavior: contain;
}

.mobile-nav.is-open {
  display: block;
}

.mobile-nav a {
  display: flex;
  width: 100%;
  min-height: 48px;
  align-items: center;
  padding: 11px 12px;
  border-bottom: 1px solid var(--color-line);
  color: var(--color-text-soft);
}

.mobile-nav a.is-active {
  background: var(--color-ink);
  color: var(--color-canvas);
  font-weight: 700;
}

.mobile-language-list {
  display: grid;
  margin-top: 12px;
}

.mobile-language-list a {
  min-height: 44px;
}

.nav-veil {
  position: fixed;
  inset: var(--header-height) 0 0;
  z-index: 70;
  display: none;
  border: 0;
  background: var(--color-overlay);
}

.nav-veil.is-open {
  display: block;
}

.site-footer {
  overflow-x: clip;
  background: var(--color-ink);
  color: var(--color-dark-text);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: clamp(34px, 6vw, 88px);
  padding-top: 72px;
  padding-bottom: 54px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}

.footer-brand img {
  width: 30px;
  height: 30px;
  filter: invert(1);
}

.footer-brand strong {
  font-family: var(--font-display);
  font-size: 20px;
}

.footer-intro {
  max-width: 430px;
  color: var(--color-dark-soft);
}

.footer-heading {
  margin-bottom: 15px;
  color: var(--color-dark-text);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 7px 18px;
}

.footer-links a,
.footer-language a {
  display: inline-flex;
  min-height: 32px;
  align-items: center;
  color: var(--color-dark-soft);
  font-size: 14px;
}

.footer-links a:hover,
.footer-language a:hover {
  color: var(--color-dark-text);
}

.footer-keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.footer-keywords a {
  display: inline-flex;
  min-height: 32px;
  align-items: center;
  padding: 5px 10px;
  border: 1px solid var(--color-dark-line);
  border-radius: var(--radius-pill);
  background: var(--color-ink-raised);
  color: var(--color-dark-soft);
  font-size: 12px;
}

.footer-language {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-top: 28px;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-top: 22px;
  padding-bottom: 28px;
  border-top: 1px solid var(--color-dark-line);
  color: var(--color-dark-soft);
  font-size: 13px;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.prose {
  color: var(--color-text);
  font-size: 17px;
}

.section-dark.prose,
.section-dark .prose {
  color: var(--color-dark-text);
}

.prose h2,
.prose h3 {
  scroll-margin-top: calc(var(--header-height) + 78px);
}

.prose p,
.prose li {
  overflow-wrap: break-word;
}

.prose a:not(.btn):not(.btn-primary):not(.btn-secondary):not(.btn-dark) {
  text-decoration: underline;
  text-decoration-color: var(--color-signal-deep);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

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

.tilt,
.tilt-card {
  transform: rotate(-.45deg);
}

@media (max-width: 1120px) {
  .desktop-nav a {
    padding-inline: 8px;
    font-size: 12.5px;
  }

  .brand-local,
  .language-button {
    display: none;
  }
}

@media (max-width: 900px) {
  .desktop-nav,
  .language-menu {
    display: none;
  }

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

  .menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

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

  .footer-grid > :first-child {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  h1 {
    font-size: clamp(32px, 9.5vw, 40px);
    line-height: 1.12;
  }

  h2 {
    font-size: clamp(29px, 8vw, 38px);
  }

  .header-shell {
    gap: 8px;
  }

  .brand-local {
    display: none;
  }

  .header-login {
    min-height: 38px;
    padding-inline: 15px;
  }

  .section {
    padding-top: 70px;
    padding-bottom: 70px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    padding-top: 54px;
  }

  .footer-grid > :first-child {
    grid-column: auto;
  }

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

@media (max-width: 640px) {
  :root {
    --gutter: 16px;
  }

  .site-brand img {
    width: 25px;
    height: 25px;
  }

  .brand-word {
    font-size: 17px;
  }

  .button-row > .btn,
  .button-row > .btn-primary,
  .button-row > .btn-secondary,
  .button-row > .btn-dark {
    flex: 1 1 140px;
  }

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

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

@media (max-width: 360px) {
  .header-login {
    padding-inline: 11px;
  }

  .menu-toggle {
    padding-inline: 8px;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0s !important;
    animation-duration: 0s !important;
    animation-iteration-count: 1 !important;
  }

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