:root {
  --color-page: #F4F5F7;
  --color-panel: #FFFFFF;
  --color-panel-alt: #ECEEF1;
  --color-line: #DCE0E5;
  --color-brand: #067A5B;
  --color-brand-deep: #04563F;
  --color-text: #14181B;
  --color-text-soft: #5A626B;
  --color-success: #1B9E4B;
  --color-warning: #E8930C;
  --color-error: #D64545;
  --color-water-a: #CFE9F4;
  --color-water-b: #A8D8EC;
  --color-water-edge: #8CC5DF;
  --color-flag-red: #C93A3A;
  --color-flag-blue: #33549B;
  --color-shadow-soft: rgba(20, 24, 27, 0.06);
  --color-shadow-medium: rgba(20, 24, 27, 0.12);
  --color-shadow-brand: rgba(6, 122, 91, 0.22);
  --color-scrim: rgba(20, 24, 27, 0.36);
  --font-display: 'Inter', 'Noto Sans SC', -apple-system, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Inter', 'Noto Sans SC', -apple-system, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-code: 'JetBrains Mono', 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-pill: 999px;
  --shadow-soft: 0 2px 10px var(--color-shadow-soft);
  --shadow-card: 0 10px 30px var(--color-shadow-soft);
  --shadow-raised: 0 16px 38px var(--color-shadow-medium);
  --shadow-action: 0 6px 18px var(--color-shadow-brand);
  --content-wide: 1264px;
  --content-reading: 800px;
  --gutter: 32px;
  --header-height: 60px;
  --section-space: 88px;
  --toc-offset: 76px;
  --motion-fast: 150ms;
  --motion-normal: 420ms;
}

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

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

html.nav-open {
  overflow: hidden;
}

body {
  min-width: 320px;
  margin: 0;
  overflow-x: clip;
  background: var(--color-page);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.68;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

section,
.hero,
.decorated-section {
  overflow-x: clip;
}

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

img {
  height: auto;
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  border: 0;
  cursor: pointer;
}

a {
  color: var(--color-brand);
  text-decoration: none;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--color-brand-deep);
}

p,
ul,
ol,
blockquote,
pre,
table {
  margin-top: 0;
  margin-bottom: 1.25rem;
}

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

h1,
h2,
h3,
h4 {
  margin-top: 0;
  color: var(--color-text);
  font-family: var(--font-display);
  text-wrap: balance;
}

h1 {
  margin-bottom: 1.25rem;
  font-size: clamp(52px, 5.2vw, 72px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

h2 {
  margin-bottom: 1rem;
  font-size: clamp(32px, 3.4vw, 48px);
  font-weight: 800;
  letter-spacing: -0.015em;
  line-height: 1.16;
}

h3 {
  margin-bottom: 0.7rem;
  font-size: clamp(21px, 2vw, 28px);
  font-weight: 750;
  line-height: 1.25;
}

h4 {
  margin-bottom: 0.55rem;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.35;
}

strong {
  font-weight: 750;
}

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

code {
  overflow-wrap: anywhere;
}

pre {
  max-width: 100%;
  overflow-x: auto;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  padding: 1rem;
  background: var(--color-text);
  color: var(--color-panel);
  font-family: var(--font-code);
  -webkit-overflow-scrolling: touch;
}

pre code {
  overflow-wrap: normal;
  white-space: pre;
}

hr {
  border: 0;
  border-top: 1px solid var(--color-line);
  margin: 2rem 0;
}

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

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

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

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

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

.section--panel {
  border-block: 1px solid var(--color-line);
  background: var(--color-panel);
}

.section-head {
  max-width: 760px;
  margin-bottom: 2.25rem;
}

.section-head--center {
  margin-inline: auto;
  text-align: center;
}

.eyebrow {
  margin-bottom: 0.65rem;
  color: var(--color-brand);
  font-family: var(--font-code);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.lead {
  max-width: 720px;
  color: var(--color-text-soft);
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.65;
}

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

.surface,
.card,
.panel {
  min-width: 0;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-panel);
  box-shadow: var(--shadow-soft);
}

.card,
.panel {
  padding: 24px;
}

.card {
  transition:
    border-color var(--motion-fast) ease,
    box-shadow var(--motion-fast) ease,
    transform var(--motion-fast) ease;
}

.card:hover {
  border-color: var(--color-brand);
  box-shadow: var(--shadow-card);
  transform: translateY(-3px);
}

.tilt {
  transform: rotate(-0.35deg);
}

.btn,
.btn-main,
.btn-sub,
.btn-login {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 11px 24px;
  font-weight: 700;
  line-height: 1.2;
  text-align: center;
  transition:
    background var(--motion-fast) ease,
    border-color var(--motion-fast) ease,
    color var(--motion-fast) ease,
    transform var(--motion-fast) ease,
    box-shadow var(--motion-fast) ease;
}

.btn:hover,
.btn-main:hover,
.btn-sub:hover,
.btn-login:hover {
  transform: translateY(-1px);
}

.btn-main,
.btn--primary {
  border-color: var(--color-brand);
  background: var(--color-brand);
  color: var(--color-panel);
  box-shadow: var(--shadow-action);
}

.btn-main:hover,
.btn--primary:hover {
  border-color: var(--color-brand-deep);
  background: var(--color-brand-deep);
  color: var(--color-panel);
}

.btn-sub,
.btn--secondary {
  border-color: var(--color-line);
  background: var(--color-panel);
  color: var(--color-text);
}

.btn-sub:hover,
.btn--secondary:hover {
  border-color: var(--color-brand);
  color: var(--color-brand);
}

.btn--outline,
.btn-login {
  border-color: var(--color-brand);
  background: var(--color-panel);
  color: var(--color-brand);
}

.btn--outline:hover,
.btn-login:hover {
  background: var(--color-brand);
  color: var(--color-panel);
}

.btn--danger {
  border-color: var(--color-error);
  background: var(--color-error);
  color: var(--color-panel);
}

.btn[disabled],
.btn.is-disabled {
  cursor: not-allowed;
  opacity: 0.55;
  transform: none;
}

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

.badge,
.chip,
.trust-chip {
  display: inline-flex;
  max-width: 100%;
  min-width: 0;
  align-items: center;
  gap: 0.45rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  padding: 5px 12px;
  overflow: hidden;
  background: var(--color-panel);
  color: var(--color-text-soft);
  font-size: 13px;
  line-height: 1.35;
}

.badge__dot,
.status-dot {
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
  border-radius: var(--radius-pill);
  background: var(--color-success);
}

.badge--warning {
  border-color: var(--color-warning);
  color: var(--color-warning);
}

.badge--brand {
  border-color: var(--color-brand);
  color: var(--color-brand);
}

.site-head {
  position: relative;
  z-index: 100;
  border-bottom: 1px solid var(--color-line);
  background: var(--color-panel);
}

.head-in {
  display: flex;
  min-height: var(--header-height);
  align-items: center;
  gap: 28px;
}

.brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 10px;
  color: var(--color-text);
}

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

.brand-logo {
  width: 30px;
  height: 30px;
  flex: 0 0 auto;
}

.brand-copy {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.brand-local {
  display: none;
  color: var(--color-text-soft);
  font-size: 13px;
  font-weight: 550;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-left: 14px;
}

.main-nav a {
  color: var(--color-text-soft);
  font-size: 14px;
  font-weight: 550;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

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

.main-nav a.is-active {
  font-weight: 750;
}

.head-tools {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: auto;
}

.language-control {
  position: relative;
}

.language-button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: 6px;
  padding: 8px;
  background: transparent;
  color: var(--color-text-soft);
  font-size: 13px;
}

.language-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 130;
  width: 154px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  padding: 6px;
  background: var(--color-panel);
  box-shadow: var(--shadow-raised);
}

.language-menu[hidden] {
  display: none;
}

.language-menu a {
  display: block;
  min-height: 40px;
  border-radius: var(--radius-xs);
  padding: 8px 10px;
  color: var(--color-text-soft);
  font-size: 13px;
}

.language-menu a:hover,
.language-menu a[aria-current='true'] {
  background: var(--color-panel-alt);
  color: var(--color-text);
}

.menu-toggle {
  display: none;
  width: 44px;
  min-width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  background: var(--color-panel);
  color: var(--color-text);
}

.menu-toggle svg {
  width: 22px;
  height: 22px;
}

.mobile-nav {
  display: none;
}

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

.mobile-nav__panel {
  position: absolute;
  top: var(--header-height);
  right: 0;
  left: 0;
  z-index: 122;
  max-height: calc(100dvh - var(--header-height));
  overflow-y: auto;
  overscroll-behavior: contain;
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  padding: 10px var(--gutter) 18px;
  background: var(--color-panel);
  box-shadow: var(--shadow-raised);
}

.mobile-nav a {
  display: flex;
  width: 100%;
  min-height: 46px;
  align-items: center;
  border-bottom: 1px solid var(--color-line);
  padding: 10px 4px;
  color: var(--color-text);
}

.mobile-nav a.is-active {
  color: var(--color-brand);
  font-weight: 750;
}

.mobile-nav__languages {
  margin-top: 12px;
}

.mobile-nav__label {
  margin: 8px 4px;
  color: var(--color-text-soft);
  font-size: 12px;
  font-weight: 700;
}

.nav-veil {
  position: fixed;
  inset: var(--header-height) 0 0;
  z-index: 90;
  background: var(--color-scrim);
}

.nav-veil[hidden] {
  display: none;
}

.site-footer {
  border-top: 1px solid var(--color-line);
  background: var(--color-panel);
}

.footer-main {
  display: grid;
  grid-template-columns: minmax(240px, 1.3fr) repeat(3, minmax(150px, 1fr));
  gap: 42px;
  padding-top: 58px;
  padding-bottom: 44px;
}

.footer-brand p {
  max-width: 340px;
  margin-top: 16px;
  color: var(--color-text-soft);
}

.footer-heading {
  margin-bottom: 14px;
  font-family: var(--font-code);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.footer-links {
  display: grid;
  gap: 8px;
}

.footer-links a {
  color: var(--color-text-soft);
  font-size: 14px;
}

.footer-links a:hover {
  color: var(--color-brand);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  border-top: 1px solid var(--color-line);
  padding-top: 20px;
  padding-bottom: 26px;
  color: var(--color-text-soft);
  font-size: 13px;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-legal a {
  color: var(--color-text-soft);
}

.reveal {
  transition:
    opacity var(--motion-normal) ease,
    transform var(--motion-normal) ease;
}

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

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

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

.prose h2,
.prose h3 {
  scroll-margin-top: var(--toc-offset);
}

.prose h2 {
  margin-top: 3.5rem;
}

.prose h3 {
  margin-top: 2.25rem;
}

.prose a {
  text-decoration: underline;
}

.prose img {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
}

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

@media (max-width: 1120px) {
  .main-nav {
    gap: 15px;
    margin-left: 0;
  }

  .main-nav a {
    font-size: 13px;
  }

  .brand-local {
    display: none;
  }
}

@media (max-width: 920px) {
  .main-nav,
  .language-control {
    display: none;
  }

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

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

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

@media (max-width: 768px) {
  :root {
    --gutter: 20px;
    --section-space: 64px;
  }

  h1 {
    font-size: clamp(34px, 9.4vw, 40px);
    line-height: 1.12;
  }

  h2 {
    font-size: clamp(28px, 7.6vw, 36px);
  }

  .brand-local {
    display: inline;
  }

  .btn-login {
    padding-inline: 15px;
  }
}

@media (max-width: 640px) {
  :root {
    --gutter: 16px;
    --header-height: 58px;
  }

  body {
    font-size: 15px;
  }

  .wrap,
  .reading-wrap {
    padding-inline: var(--gutter);
  }

  .tilt,
  [class*='tilt'] {
    transform: none;
  }

  .head-in {
    min-height: var(--header-height);
    gap: 8px;
  }

  .brand-copy {
    gap: 5px;
  }

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

  .brand-local {
    display: none;
  }

  .head-tools {
    margin-left: auto;
    gap: 7px;
  }

  .btn-login {
    min-height: 40px;
    padding: 8px 13px;
    font-size: 13px;
  }

  .button-row,
  .cta-row {
    align-items: stretch;
  }

  .button-row .btn,
  .cta-row .btn,
  .cta-row .btn-main,
  .cta-row .btn-sub {
    flex: 1 1 140px;
  }

  .card,
  .panel {
    padding: 20px;
  }

  .footer-main {
    grid-template-columns: 1fr;
    gap: 30px;
  }

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

@media (max-width: 380px) {
  .brand-logo {
    width: 28px;
    height: 28px;
  }

  .btn-login {
    padding-inline: 10px;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

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