:root {
  --color-bg: #F8F3EA;
  --color-panel: #FFFDF8;
  --color-panel-soft: #F1EADC;
  --color-border: #E4DACB;
  --color-accent: #3D2C8D;
  --color-accent-dark: #2A1D66;
  --color-accent-bright: #6B5BE0;
  --color-text: #2A2318;
  --color-muted: #6E6353;
  --color-success: #2E7D4F;
  --color-warning: #C27A12;
  --color-error: #B8362A;
  --color-white: #FFFFFF;
  --color-hero-top: #FBF7EF;
  --color-hero-bottom: #F3ECDD;
  --color-plate-start: #EFE9FB;
  --color-plate-end: #E6E0F7;
  --color-accent-a06: rgba(61, 44, 141, .06);
  --color-accent-a08: rgba(61, 44, 141, .08);
  --color-accent-a10: rgba(61, 44, 141, .10);
  --color-accent-a12: rgba(61, 44, 141, .12);
  --color-accent-a14: rgba(61, 44, 141, .14);
  --color-accent-a22: rgba(61, 44, 141, .22);
  --color-ink-a04: rgba(42, 35, 24, .04);
  --color-ink-a06: rgba(42, 35, 24, .06);
  --color-ink-a10: rgba(42, 35, 24, .10);
  --color-ink-a18: rgba(42, 35, 24, .18);
  --color-white-a20: rgba(255, 255, 255, .20);
  --color-white-a45: rgba(255, 255, 255, .45);
  --color-white-a60: rgba(255, 255, 255, .60);
  --color-success-a14: rgba(46, 125, 79, .14);
  --color-grain: rgba(42, 35, 24, .035);
  --color-flag-red: #D8232A;
  --color-flag-blue: #2B4C9B;
  --color-flag-navy: #1E3A8A;
  --color-flag-black: #1F1F1F;
  --color-flag-gold: #F2C400;
  --font-display: 'Inter', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
  --font-body: 'Inter', 'Noto Sans SC', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Menlo, Consolas, 'Liberation Mono', monospace;
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-pill: 999px;
  --shadow-panel: 0 18px 40px -18px var(--color-accent-a14), 0 1px 2px var(--color-ink-a06);
  --shadow-raised: 0 30px 56px -20px var(--color-accent-a14), 0 2px 6px var(--color-ink-a06);
  --shadow-button: 0 12px 24px -10px var(--color-accent-a22);
  --content-width: 1280px;
  --gutter: clamp(16px, 3.2vw, 40px);
  --header-height: 72px;
  --section-space: clamp(64px, 8vw, 112px);
  --focus-size: 2px;
  --transition-fast: 160ms ease;
  --transition-reveal: 560ms cubic-bezier(.22, 1, .36, 1);
}
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  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;
  margin: 0;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image: radial-gradient(var(--color-grain) .6px, transparent .7px);
  background-size: 3px 3px;
  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,
canvas {
  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 {
  cursor: pointer;
}
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: 28px;
  font-size: clamp(52px, 5.2vw, 68px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -.02em;
}
h2 {
  margin-bottom: 20px;
  font-size: clamp(36px, 4.2vw, 54px);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -.02em;
}
h3 {
  margin-bottom: 10px;
  font-size: clamp(20px, 2vw, 26px);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -.01em;
}
p {
  margin-bottom: 1em;
}
ul,
ol {
  padding-left: 1.35em;
}
code,
kbd,
samp {
  font-family: var(--font-mono);
}
:not(pre) > code {
  padding: .12em .32em;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xs);
  background: var(--color-panel-soft);
  overflow-wrap: anywhere;
}
pre {
  max-width: 100%;
  padding: 18px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-text);
  color: var(--color-panel);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
pre code {
  white-space: pre;
}
hr {
  border: 0;
  border-top: 1px solid var(--color-border);
}
::selection {
  background: var(--color-accent-a22);
}
:focus-visible {
  outline: var(--focus-size) solid var(--color-accent);
  outline-offset: 3px;
}
.wrap {
  width: 100%;
  max-width: var(--content-width);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.section {
  padding-top: var(--section-space);
  padding-bottom: var(--section-space);
}
.section-soft {
  background: var(--color-panel-soft);
}
.section-head {
  max-width: 760px;
  margin-bottom: 40px;
}
.eyebrow {
  margin-bottom: 12px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.muted {
  color: var(--color-muted);
}
.mono {
  font-family: var(--font-mono);
}
.no-break {
  white-space: nowrap;
}
.text-link {
  display: inline-flex;
  min-height: 24px;
  align-items: center;
  gap: 7px;
  color: var(--color-accent);
  font-weight: 700;
}
.text-link:hover {
  color: var(--color-accent-dark);
}
.panel,
.card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
  box-shadow: var(--shadow-panel);
}
.panel {
  padding: clamp(20px, 3vw, 34px);
}
.card {
  padding: 24px;
}
.badge {
  display: inline-flex;
  min-height: 28px;
  max-width: 100%;
  align-items: center;
  gap: 7px;
  padding: 3px 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-panel);
  color: var(--color-muted);
  font-size: 12px;
  font-weight: 700;
  overflow: hidden;
}
.badge-accent {
  border-color: transparent;
  background: var(--color-accent-a10);
  color: var(--color-accent);
}
.badge-success {
  border-color: transparent;
  background: var(--color-success-a14);
  color: var(--color-success);
}
.status-dot {
  width: 8px;
  height: 8px;
  flex: 0 0 8px;
  border-radius: 50%;
  background: var(--color-success);
  box-shadow: 0 0 0 3px var(--color-success-a14);
}
.btn {
  display: inline-flex;
  min-width: 24px;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-weight: 700;
  line-height: 1.2;
  transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}
.btn:hover {
  transform: translateY(-1px);
}
.btn-primary {
  color: var(--color-white);
  background: linear-gradient(180deg, var(--color-accent-bright) -60%, var(--color-accent) 45%);
  box-shadow: var(--shadow-button), inset 0 1px 0 var(--color-white-a20);
}
.btn-primary:hover {
  background: var(--color-accent-dark);
}
.btn-secondary {
  border-color: var(--color-text);
  background: var(--color-panel);
  color: var(--color-text);
}
.btn-secondary:hover {
  background: var(--color-panel-soft);
}
.btn-quiet {
  border-color: var(--color-border);
  background: transparent;
  color: var(--color-accent);
}
.btn[aria-disabled="true"],
.btn:disabled {
  color: var(--color-muted);
  background: var(--color-panel-soft);
  box-shadow: none;
  cursor: not-allowed;
  transform: none;
}
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.reveal {
  transition: opacity var(--transition-reveal), transform var(--transition-reveal);
}
.reveal.pending {
  opacity: 0;
  transform: translateY(16px);
}
.reveal.shown {
  opacity: 1;
  transform: none;
}
#site-header {
  position: relative;
  z-index: 100;
}
.site-header {
  height: var(--header-height);
  background: var(--color-hero-top);
}
.header-inner {
  position: relative;
  display: flex;
  height: 100%;
  align-items: center;
  gap: 34px;
}
.site-brand {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.site-brand img {
  width: 32px;
  height: 32px;
}
.brand-word {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -.02em;
}
.brand-local {
  color: var(--color-muted);
  font-size: 14px;
  font-weight: 500;
}
.desktop-nav {
  display: flex;
  flex: 1;
  align-items: center;
  gap: 5px;
}
.desktop-nav > a,
.nav-more-button {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  gap: 6px;
  padding: 8px 11px;
  border: 0;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-muted);
  font-size: 14px;
  font-weight: 600;
}
.desktop-nav > a:hover,
.nav-more-button:hover {
  background: var(--color-ink-a04);
  color: var(--color-text);
}
.desktop-nav a.is-active,
.nav-more.is-active .nav-more-button {
  color: var(--color-text);
}
.desktop-nav a.is-active {
  box-shadow: inset 0 -2px 0 var(--color-accent);
}
.nav-more,
.language-picker {
  position: relative;
}
.nav-more-menu,
.language-menu {
  position: absolute;
  top: calc(100% + 6px);
  min-width: 190px;
  padding: 6px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
  box-shadow: var(--shadow-panel);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
}
.nav-more-menu {
  left: 0;
}
.language-menu {
  right: 0;
}
.nav-more:hover .nav-more-menu,
.nav-more:focus-within .nav-more-menu,
.language-picker.is-open .language-menu {
  opacity: 1;
  visibility: visible;
  transform: none;
}
.nav-more-menu a,
.language-menu a {
  display: flex;
  min-height: 40px;
  align-items: center;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
}
.nav-more-menu a:hover,
.language-menu a:hover,
.language-menu a[aria-current="true"] {
  background: var(--color-accent-a08);
  color: var(--color-accent);
}
.header-tools {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
}
.language-button {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  gap: 5px;
  padding: 6px 8px;
  border: 0;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-muted);
  font-size: 14px;
}
.header-login {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  justify-content: center;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  background: var(--color-accent);
  color: var(--color-white);
  font-size: 14px;
  font-weight: 700;
  box-shadow: 0 8px 18px -8px var(--color-accent-a22);
}
.header-login:hover {
  background: var(--color-accent-dark);
}
.menu-toggle {
  display: none;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-panel);
}
.menu-toggle-lines,
.menu-toggle-lines::before,
.menu-toggle-lines::after {
  width: 19px;
  height: 2px;
  border-radius: var(--radius-pill);
  background: var(--color-text);
}
.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: 44px;
  align-items: center;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-weight: 650;
}
.mobile-nav a:hover,
.mobile-nav a.is-active {
  background: var(--color-accent-a08);
  color: var(--color-accent);
}
.mobile-nav-label {
  padding: 12px 12px 5px;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
}
.nav-veil {
  display: none;
}
.site-footer {
  padding-top: 64px;
  padding-bottom: 28px;
  border-top: 1px solid var(--color-border);
  background: var(--color-panel-soft);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.35fr 1fr 1fr;
  gap: 48px;
}
.footer-brand {
  max-width: 390px;
}
.footer-brand .site-brand {
  margin-bottom: 14px;
}
.footer-brand p {
  color: var(--color-muted);
}
.footer-heading {
  margin-bottom: 14px;
  font-size: 14px;
  font-weight: 800;
}
.footer-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px 14px;
}
.footer-links a,
.footer-keywords a {
  display: inline-flex;
  min-height: 32px;
  align-items: center;
  color: var(--color-muted);
  font-size: 14px;
}
.footer-links a:hover,
.footer-keywords a:hover {
  color: var(--color-accent);
}
.footer-keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}
.footer-keywords a {
  min-height: 30px;
  padding: 3px 9px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-panel);
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 42px;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
  color: var(--color-muted);
  font-size: 13px;
}
.footer-language {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.footer-language a {
  min-height: 24px;
}
.prose {
  max-width: 820px;
}
.prose h2 {
  margin-top: 2em;
}
.prose h3 {
  margin-top: 1.65em;
}
.prose p,
.prose li {
  color: var(--color-muted);
}
.prose strong {
  color: var(--color-text);
}
.prose a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}
#server-status {
  position: static;
  display: block;
  width: 100%;
  margin-bottom: 32px;
  overflow: hidden;
}
#server-status + * {
  margin-top: 0;
}
body:has(.toc-tabs) section[id] {
  scroll-margin-top: calc(var(--header-height) + 82px);
}
@media (max-width: 1040px) {
  .desktop-nav > a {
    padding-inline: 8px;
  }
  .language-button span {
    display: none;
  }
}
@media (max-width: 900px) {
  .desktop-nav,
  .language-picker {
    display: none;
  }
  .header-tools {
    margin-left: auto;
  }
  .menu-toggle {
    display: inline-flex;
  }
  .mobile-nav {
    position: fixed;
    top: var(--header-height);
    right: var(--gutter);
    left: var(--gutter);
    z-index: 103;
    max-height: calc(100dvh - var(--header-height) - 16px);
    padding: 8px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-panel);
    box-shadow: var(--shadow-raised);
    overflow-y: auto;
    overscroll-behavior: contain;
  }
  .mobile-nav.is-open {
    display: block;
  }
  .nav-veil {
    position: fixed;
    inset: var(--header-height) 0 0;
    z-index: 99;
    background: var(--color-ink-a18);
  }
  .nav-veil.is-open {
    display: block;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .footer-brand {
    grid-column: 1 / -1;
  }
}
@media (max-width: 768px) {
  h1 {
    font-size: clamp(32px, 9.5vw, 40px);
  }
  h2 {
    font-size: clamp(28px, 8vw, 38px);
  }
  .section {
    padding-top: 64px;
    padding-bottom: 64px;
  }
}
@media (max-width: 640px) {
  .no-break {
    white-space: normal;
  }
  .tilt,
  [class*="tilt-"] {
    transform: none;
  }
  .decor,
  .glow,
  .stripe-halo {
    max-width: 100%;
  }
  .button-row .btn {
    flex: 1 1 150px;
  }
  .header-inner {
    gap: 8px;
  }
  .site-brand {
    gap: 7px;
  }
  .site-brand img {
    width: 30px;
    height: 30px;
  }
  .brand-word {
    font-size: 17px;
  }
  .header-login {
    padding-inline: 12px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-brand {
    grid-column: auto;
  }
  .footer-bottom {
    align-items: flex-start;
    flex-direction: column;
  }
}
@media (max-width: 370px) {
  .header-login {
    padding-inline: 9px;
    font-size: 13px;
  }
  .brand-word {
    font-size: 16px;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    scroll-behavior: auto;
    transition-duration: .01ms;
  }
  .reveal,
  .reveal.pending {
    opacity: 1;
    transform: none;
  }
}