:root {
  --color-bg: #dee8f4;
  --color-panel: #f4f8fd;
  --color-panel-deep: #cddcee;
  --color-border: #b9cce2;
  --color-accent: #1f2e52;
  --color-accent-dark: #131f3b;
  --color-text: #15223c;
  --color-text-muted: #4e5f7c;
  --color-success: #1f9d66;
  --color-warning: #d28e1f;
  --color-error: #d6493f;
  --color-flag-red: #cd4a41;
  --color-flag-blue: #2e4c86;
  --color-flag-white: #f6f9fd;
  --color-flag-gold: #d9a83e;
  --color-flag-ink: #2b3242;
  --color-overlay: rgba(19, 31, 59, 0.46);
  --color-shadow-soft: rgba(19, 31, 59, 0.1);
  --color-shadow-deep: rgba(19, 31, 59, 0.28);
  --color-shadow-button: rgba(19, 31, 59, 0.18);
  --color-shadow-float: rgba(19, 31, 59, 0.38);
  --color-success-ring: rgba(31, 157, 102, 0.18);
  --font-display: "Inter", "Noto Sans SC", -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: "Inter", "Noto Sans SC", -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", "Cascadia Mono", Consolas, monospace;
  --radius-xs: 6px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-pill: 999px;
  --shadow-window: 0 2px 6px var(--color-shadow-soft), 0 28px 56px -20px var(--color-shadow-deep);
  --shadow-button: 0 2px 0 var(--color-shadow-button);
  --shadow-float: 0 10px 26px -8px var(--color-shadow-float);
  --header-height: 72px;
  --content-width: 1280px;
  --gutter: 32px;
  --section-space: 88px;
  --focus-width: 2px;
  --transition-fast: 160ms ease;
  --transition-base: 260ms ease;
}

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

html {
  min-width: 320px;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 16px);
  background: var(--color-bg);
}

html.nav-open {
  overflow: hidden;
}

body {
  min-width: 320px;
  margin: 0;
  overflow-x: clip;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

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

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

img {
  display: block;
  height: auto;
}

svg {
  flex-shrink: 0;
}

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

button,
summary,
[role="tab"] {
  cursor: pointer;
}

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

p,
ul,
ol,
dl,
blockquote,
pre,
table {
  margin-top: 0;
}

p:last-child,
ul:last-child,
ol:last-child,
blockquote:last-child {
  margin-bottom: 0;
}

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

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

code {
  border-radius: var(--radius-xs);
  background: var(--color-panel-deep);
  padding: 0.12em 0.34em;
  font-size: 0.9em;
}

pre {
  max-width: 100%;
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-accent-dark);
  color: var(--color-panel);
  padding: 18px;
  -webkit-overflow-scrolling: touch;
}

pre code {
  display: block;
  min-width: max-content;
  background: none;
  padding: 0;
  color: inherit;
  overflow-wrap: normal;
}

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

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

:focus-visible {
  outline: var(--focus-width) 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-compact {
  padding-top: 48px;
  padding-bottom: 48px;
}

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

.eyebrow {
  margin-bottom: 12px;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

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

h1,
.hero-title {
  margin-bottom: 18px;
  font-size: clamp(52px, 5vw, 72px);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(34px, 4vw, 50px);
  font-weight: 900;
  letter-spacing: -0.018em;
  line-height: 1.14;
}

h3 {
  margin-bottom: 12px;
  font-size: clamp(21px, 2vw, 28px);
  font-weight: 850;
  line-height: 1.25;
}

h4 {
  margin-bottom: 8px;
  font-size: 17px;
  font-weight: 800;
}

.lead {
  max-width: 42em;
  color: var(--color-text-muted);
  font-size: clamp(17px, 1.8vw, 21px);
  line-height: 1.65;
}

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

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

.text-link {
  color: var(--color-accent);
  font-weight: 750;
  text-decoration: underline;
  text-decoration-color: var(--color-border);
  text-underline-offset: 4px;
}

.btn,
.btn-primary,
.btn-secondary,
.btn-quiet {
  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-sm);
  padding: 11px 24px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 800;
  line-height: 1.35;
  text-align: center;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.btn-primary {
  border-color: var(--color-accent);
  background: var(--color-accent);
  color: var(--color-panel);
  box-shadow: var(--shadow-button);
}

.btn-primary:hover {
  border-color: var(--color-accent-dark);
  background: var(--color-accent-dark);
  transform: translateY(-1px);
}

.btn-secondary {
  border-color: var(--color-border);
  background: var(--color-panel);
  color: var(--color-accent);
}

.btn-secondary:hover {
  border-color: var(--color-accent);
}

.btn-quiet {
  border-color: transparent;
  background: transparent;
  color: var(--color-accent);
}

.btn-quiet:hover {
  background: var(--color-panel-deep);
}

.btn[aria-disabled="true"],
.btn:disabled {
  cursor: not-allowed;
  opacity: 0.55;
  transform: none;
}

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

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

.panel {
  padding: 28px;
}

.card {
  padding: 24px;
  transition: border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: 0 16px 32px -24px var(--color-shadow-deep);
}

.badge,
.chip,
.status-chip {
  display: inline-flex;
  max-width: 100%;
  min-height: 26px;
  align-items: center;
  gap: 7px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-panel);
  padding: 3px 11px;
  color: var(--color-text-muted);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.4;
  text-overflow: ellipsis;
  white-space: nowrap;
}

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

.status-dot.warning {
  background: var(--color-warning);
}

.status-dot.error {
  background: var(--color-error);
}

.reveal {
  transition: opacity 560ms ease, transform 560ms ease;
}

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

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

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

.site-head-inner {
  display: flex;
  height: 100%;
  align-items: center;
  gap: 32px;
}

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

.site-brand-logo {
  width: 30px;
  height: 30px;
}

.site-brand-name {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.site-brand-local {
  color: var(--color-text-muted);
  font-size: 13px;
  font-weight: 650;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.desktop-nav a {
  display: inline-flex;
  min-height: 44px;
  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.is-active {
  color: var(--color-accent);
}

.desktop-nav a.is-active {
  font-weight: 850;
}

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

.language-switcher {
  position: relative;
}

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

.language-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  z-index: 92;
  display: none;
  width: 152px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-panel);
  box-shadow: var(--shadow-window);
  padding: 6px;
}

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

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

.language-menu a:hover,
.language-menu a[aria-current="true"] {
  background: var(--color-panel-deep);
  color: var(--color-accent);
}

.header-login {
  display: inline-flex;
  min-height: 38px;
  align-items: center;
  justify-content: center;
  border: 1.5px solid var(--color-accent);
  border-radius: var(--radius-sm);
  padding: 7px 18px;
  color: var(--color-accent);
  font-size: 13.5px;
  font-weight: 800;
}

.header-login:hover {
  background: var(--color-accent);
  color: var(--color-panel);
}

.menu-toggle {
  display: none;
  width: 44px;
  min-width: 44px;
  height: 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);
  color: var(--color-accent);
}

.menu-toggle-lines,
.menu-toggle-lines::before,
.menu-toggle-lines::after {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: var(--radius-pill);
  background: currentColor;
  content: "";
  transition: transform var(--transition-fast);
}

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

.menu-toggle-lines::before {
  position: absolute;
  transform: translateY(-6px);
}

.menu-toggle-lines::after {
  position: absolute;
  transform: translateY(6px);
}

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

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

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

.mobile-drawer {
  position: absolute;
  top: var(--header-height);
  right: 0;
  left: 0;
  z-index: 90;
  display: none;
  max-height: calc(100dvh - var(--header-height));
  overflow-y: auto;
  overscroll-behavior: contain;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-panel);
  padding: 10px var(--gutter) 18px;
  box-shadow: var(--shadow-window);
}

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

.mobile-drawer a {
  display: flex;
  width: 100%;
  min-height: 46px;
  align-items: center;
  border-bottom: 1px solid var(--color-border);
  padding: 11px 8px;
  color: var(--color-text-muted);
  font-weight: 650;
}

.mobile-drawer a.is-active,
.mobile-drawer a[aria-current="true"] {
  color: var(--color-accent);
  font-weight: 850;
}

.mobile-language-label {
  margin: 18px 8px 4px;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
}

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

.footer-main {
  display: grid;
  grid-template-columns: minmax(220px, 1.25fr) repeat(3, minmax(150px, 1fr));
  gap: 42px;
  padding-top: 56px;
  padding-bottom: 42px;
}

.footer-brand {
  max-width: 310px;
}

.footer-brand-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.footer-logo {
  width: 34px;
  height: 34px;
}

.footer-brand-name {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 900;
}

.footer-copy {
  color: var(--color-text-muted);
  font-size: 13px;
}

.footer-heading {
  margin-bottom: 12px;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 850;
}

.footer-links {
  display: grid;
  gap: 6px;
  padding: 0;
  list-style: none;
}

.footer-links a {
  display: inline-flex;
  min-height: 30px;
  align-items: center;
  color: var(--color-text-muted);
  font-size: 13px;
}

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

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-top: 1px solid var(--color-border);
  padding-top: 20px;
  padding-bottom: 24px;
  color: var(--color-text-muted);
  font-size: 12px;
}

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

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

.prose > * {
  max-width: 100%;
}

.prose h2 {
  margin-top: 2.2em;
}

.prose h3 {
  margin-top: 1.8em;
}

.prose p,
.prose li {
  color: var(--color-text-muted);
}

.prose a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.prose img {
  border-radius: var(--radius-sm);
}

.tilt,
.tilt-card {
  transform: rotate(-0.45deg);
}

@media (max-width: 1180px) {
  .desktop-nav {
    gap: 15px;
  }

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

  .site-head-inner {
    gap: 18px;
  }

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

@media (max-width: 960px) {
  .desktop-nav,
  .language-switcher {
    display: none;
  }

  .header-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,
  .hero-title {
    font-size: clamp(32px, 9.8vw, 40px);
    line-height: 1.12;
  }

  h2 {
    font-size: clamp(28px, 8vw, 36px);
  }

  .lead {
    font-size: 17px;
  }

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

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

  .site-head-inner {
    gap: 9px;
  }

  .site-brand-logo {
    width: 28px;
    height: 28px;
  }

  .site-brand-name {
    font-size: 16px;
  }

  .header-login {
    min-height: 36px;
    padding-inline: 13px;
  }

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

  .button-row,
  .button-row .btn,
  .button-row .btn-primary,
  .button-row .btn-secondary {
    width: 100%;
  }

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

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

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

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

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto;
    transition-duration: 0.01ms;
  }

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