:root {
  --color-bg: #F7F1E6;
  --color-paper: #FFFDF9;
  --color-paper-muted: #EFE6D6;
  --color-border: #E3D8C4;
  --color-primary: #17385A;
  --color-primary-deep: #0F2740;
  --color-text: #241C14;
  --color-text-muted: #6B5F52;
  --color-success: #2F8F5A;
  --color-warning: #D9902A;
  --color-error: #C7472F;
  --color-honey: #F5B335;
  --color-honey-light: #FBC85E;
  --color-honey-deep: #E6A322;
  --color-ochre: #D96A3C;
  --color-hero-top: #FBF7EE;
  --color-hero-bottom: #F2EADB;
  --color-flag-red: #CD4234;
  --color-flag-blue: #2E4F80;
  --color-white: #FFFFFF;
  --color-transparent: transparent;
  --font-display: 'Inter', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
  --font-body: 'Inter', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Menlo, Consolas, monospace;
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --radius-pill: 999px;
  --header-height: 76px;
  --gutter: 80px;
  --content-width: 1440px;
  --shadow-soft: 0 20px 48px color-mix(in srgb, var(--color-primary) 10%, var(--color-transparent));
  --shadow-card: 0 12px 28px color-mix(in srgb, var(--color-primary) 8%, var(--color-transparent));
  --shadow-button: 0 12px 24px color-mix(in srgb, var(--color-honey-deep) 30%, var(--color-transparent));
  --focus-ring: var(--color-ochre);
  --toc-offset: 132px;
  --transition-fast: 160ms ease;
  --transition-reveal: 620ms cubic-bezier(.2, .75, .25, 1);
}

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

html {
  min-width: 320px;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 16px);
  -webkit-text-size-adjust: 100%;
}

html.nav-open {
  overflow: hidden;
}

body {
  min-width: 320px;
  min-height: 100svh;
  margin: 0;
  color: var(--color-text);
  background: var(--color-bg);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-wrap: break-word;
}

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

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

svg {
  display: block;
  flex-shrink: 0;
}

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

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

button {
  border: 0;
  cursor: pointer;
}

ul,
ol {
  margin: 0;
}

ul[role='list'],
.menu,
.footer-links,
.trust-list {
  padding: 0;
  list-style: none;
}

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

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

h1,
.hero-title {
  max-width: 100%;
  font-size: clamp(52px, 4.7vw, 68px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -.02em;
}

h2 {
  font-size: clamp(34px, 3.4vw, 48px);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -.02em;
}

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

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

code {
  overflow-wrap: anywhere;
}

pre {
  max-width: 100%;
  padding: 20px;
  overflow-x: auto;
  color: var(--color-paper);
  background: var(--color-primary-deep);
  border-radius: var(--radius-md);
  -webkit-overflow-scrolling: touch;
}

:where(a, button, input, select, textarea, summary, [role='tab']):focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 3px;
}

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

.section {
  padding-top: 96px;
  padding-bottom: 96px;
  overflow-x: clip;
}

.section-heading {
  max-width: 780px;
  margin-bottom: 40px;
}

.eyebrow,
.section-kicker {
  display: block;
  margin-bottom: 10px;
  color: var(--color-ochre);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
}

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

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

.surface,
.card,
.panel-card {
  background: var(--color-paper);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: inset 0 1px 0 color-mix(in srgb, var(--color-white) 88%, var(--color-transparent)), var(--shadow-card);
}

.badge {
  display: inline-flex;
  min-height: 28px;
  max-width: 100%;
  align-items: center;
  gap: 7px;
  padding: 4px 11px;
  overflow: hidden;
  color: var(--color-primary);
  background: var(--color-paper-muted);
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 700;
}

.badge-dot {
  width: 8px;
  height: 8px;
  flex-shrink: 0;
  background: var(--color-success);
  border-radius: 50%;
}

.btn {
  display: inline-flex;
  min-width: 24px;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 11px 24px;
  border: 0;
  border-radius: var(--radius-pill);
  font-weight: 750;
  line-height: 1.2;
  text-align: center;
  transition: transform var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  color: var(--color-primary-deep);
  background: linear-gradient(180deg, var(--color-honey-light), var(--color-honey));
  box-shadow: var(--shadow-button), inset 0 1px 0 color-mix(in srgb, var(--color-white) 58%, var(--color-transparent));
}

.btn-secondary {
  color: var(--color-primary);
  background: var(--color-transparent);
  box-shadow: inset 0 0 0 2px var(--color-primary);
}

.btn-secondary:hover {
  background: color-mix(in srgb, var(--color-primary) 7%, var(--color-transparent));
}

.btn-dark {
  color: var(--color-paper);
  background: var(--color-primary);
}

.btn-small {
  min-height: 40px;
  padding: 9px 17px;
  font-size: 14px;
}

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

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

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

.site-header {
  position: relative;
  z-index: 80;
  min-height: var(--header-height);
  background: var(--color-hero-top);
}

.site-header-inner {
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  gap: 32px;
}

.site-brand {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.site-brand img {
  width: 36px;
  height: 36px;
  border-radius: 11px;
}

.site-brand-name {
  color: var(--color-primary);
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -.02em;
}

.site-brand-local {
  color: var(--color-text-muted);
  font-size: 14px;
  font-weight: 600;
}

.desktop-nav {
  display: flex;
  align-items: center;
}

.desktop-nav-list {
  display: flex;
  align-items: center;
  gap: 21px;
  padding: 0;
  list-style: none;
}

.desktop-nav a {
  display: inline-flex;
  min-height: 36px;
  align-items: center;
  color: var(--color-text-muted);
  font-size: 13.5px;
  font-weight: 550;
  white-space: nowrap;
}

.desktop-nav a:hover,
.desktop-nav a[aria-current='page'] {
  color: var(--color-primary);
}

.desktop-nav a[aria-current='page'] {
  font-weight: 800;
}

.header-tools {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: auto;
  flex-shrink: 0;
}

.language-picker {
  position: relative;
}

.language-button {
  display: inline-flex;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding-inline: 8px;
  color: var(--color-text-muted);
  background: var(--color-transparent);
  border: 0;
  font-size: 13px;
}

.language-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 164px;
  padding: 8px;
  visibility: hidden;
  opacity: 0;
  background: var(--color-paper);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
  transform: translateY(-5px);
  transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
}

.language-picker.is-open .language-menu {
  visibility: visible;
  opacity: 1;
  transform: translateY(0);
}

.language-menu a {
  display: flex;
  min-height: 40px;
  align-items: center;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  font-size: 13px;
}

.language-menu a:hover,
.language-menu a[aria-current='true'] {
  color: var(--color-primary);
  background: var(--color-paper-muted);
}

.header-login {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  justify-content: center;
  padding: 8px 19px;
  color: var(--color-paper);
  background: var(--color-primary);
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 750;
  box-shadow: 0 8px 18px color-mix(in srgb, var(--color-primary-deep) 20%, var(--color-transparent));
}

.menu-toggle {
  display: none;
  width: 44px;
  min-width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  padding: 0;
  color: var(--color-primary);
  background: var(--color-paper);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.menu-toggle-lines,
.menu-toggle-lines::before,
.menu-toggle-lines::after {
  width: 20px;
  height: 2px;
  background: currentColor;
  border-radius: var(--radius-pill);
}

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

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

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

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

.mobile-nav {
  display: none;
}

.mobile-nav a {
  display: flex;
  width: 100%;
  min-height: 48px;
  align-items: center;
  padding: 11px 4px;
  border-bottom: 1px solid var(--color-border);
}

.mobile-nav-languages {
  padding-top: 10px;
}

.mobile-nav-languages strong {
  display: block;
  padding-block: 8px;
  color: var(--color-text-muted);
  font-size: 12px;
}

.nav-veil {
  display: none;
}

.site-footer {
  color: var(--color-paper-muted);
  background: var(--color-primary-deep);
  overflow-x: clip;
}

.footer-inner {
  padding-top: 64px;
  padding-bottom: 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 56px;
}

.footer-brand {
  max-width: 380px;
}

.footer-brand-head {
  display: flex;
  align-items: center;
  gap: 11px;
  margin-bottom: 16px;
  color: var(--color-paper);
  font-size: 20px;
  font-weight: 800;
}

.footer-brand-head img {
  width: 38px;
  height: 38px;
  border-radius: 11px;
}

.footer-brand p {
  color: color-mix(in srgb, var(--color-paper-muted) 78%, var(--color-transparent));
}

.footer-title {
  margin-bottom: 14px;
  color: var(--color-paper);
  font-family: var(--font-display);
  font-size: 14px;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 18px;
}

.footer-links a,
.footer-language-links a {
  display: inline-flex;
  min-height: 32px;
  align-items: center;
  color: color-mix(in srgb, var(--color-paper-muted) 78%, var(--color-transparent));
  font-size: 13px;
}

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

.footer-language-links {
  display: flex;
  flex-wrap: wrap;
  gap: 7px 16px;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 44px;
  padding-top: 22px;
  border-top: 1px solid color-mix(in srgb, var(--color-paper) 14%, var(--color-transparent));
  color: color-mix(in srgb, var(--color-paper-muted) 70%, var(--color-transparent));
  font-size: 12px;
}

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

#server-status {
  position: relative;
  display: block;
  width: 100%;
  max-width: 100%;
  margin-bottom: 32px;
  overflow: hidden;
}

body:has(.toc-tabs) section[id] {
  scroll-margin-top: var(--toc-offset);
}

@media (max-width: 1240px) {
  :root {
    --gutter: 40px;
  }

  .desktop-nav-list {
    gap: 15px;
  }

  .desktop-nav a {
    font-size: 12.5px;
  }
}

@media (max-width: 1020px) {
  .desktop-nav,
  .language-picker {
    display: none;
  }

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

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

  .site-header.is-open {
    position: relative;
  }

  .site-header.is-open .mobile-nav {
    position: absolute;
    z-index: 83;
    top: 100%;
    left: 0;
    display: block;
    width: 100%;
    max-height: calc(100dvh - var(--header-height));
    padding: 8px var(--gutter) 24px;
    overflow-y: auto;
    color: var(--color-text);
    background: var(--color-paper);
    overscroll-behavior: contain;
    box-shadow: var(--shadow-soft);
  }

  .site-header.is-open + .nav-veil,
  .nav-veil.is-open {
    position: fixed;
    z-index: 70;
    inset: var(--header-height) 0 0;
    display: block;
    background: color-mix(in srgb, var(--color-primary-deep) 38%, var(--color-transparent));
  }
}

@media (max-width: 768px) {
  h1,
  .hero-title {
    font-size: clamp(28px, 9.5vw, 40px);
  }

  h2 {
    font-size: clamp(28px, 8vw, 38px);
  }

  .section {
    padding-top: 72px;
    padding-bottom: 72px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 34px;
  }
}

@media (max-width: 640px) {
  :root {
    --gutter: 18px;
    --header-height: 64px;
  }

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

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

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

  .site-header-inner {
    gap: 10px;
  }

  .site-brand-local {
    display: none;
  }

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

  .site-brand img {
    width: 34px;
    height: 34px;
  }

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

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

  .btn {
    padding-inline: 19px;
  }

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

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

  [class*='halo'],
  [class*='watermark'],
  [class*='decoration'] {
    max-width: 100%;
  }
}

@media (max-width: 360px) {
  :root {
    --gutter: 16px;
  }

  .header-login {
    padding-inline: 12px;
    font-size: 13px;
  }
}

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

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

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