:root {
  --color-bg: #FBF6EC;
  --color-panel: #F4ECDC;
  --color-panel-strong: #EDE2CC;
  --color-border: #DFD2B6;
  --color-accent: #7D2E8D;
  --color-accent-dark: #5E2069;
  --color-accent-soft: rgba(125, 46, 141, 0.10);
  --color-accent-line: rgba(125, 46, 141, 0.55);
  --color-accent-glass: rgba(125, 46, 141, 0.16);
  --color-text: #2C2118;
  --color-muted: #7A6A55;
  --color-success: #3E7C3A;
  --color-warning: #B07C1F;
  --color-error: #B3362B;
  --color-ink: #201812;
  --color-ink-edge: #3A2C20;
  --color-ink-panel: #2B2118;
  --color-ink-line: rgba(251, 246, 236, 0.10);
  --color-ink-line-strong: rgba(251, 246, 236, 0.20);
  --color-ink-text: #F5EDDC;
  --color-ink-muted: #A8967B;
  --color-status-on: #5EA857;
  --color-flag-red: #C4342C;
  --color-flag-blue: #2A418C;
  --color-white: #FFFFFF;
  --color-transparent: transparent;
  --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', ui-monospace, SFMono-Regular, Consolas, monospace;
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 9px;
  --radius-lg: 14px;
  --radius-card: 22px;
  --shadow-device: 0 30px 56px -26px rgba(44, 33, 24, 0.55), 0 8px 20px -10px rgba(44, 33, 24, 0.28);
  --shadow-card: 0 18px 38px -30px rgba(44, 33, 24, 0.48);
  --shadow-button: 0 8px 18px -8px rgba(125, 46, 141, 0.60);
  --focus-ring: 0 0 0 3px rgba(125, 46, 141, 0.22);
  --header-height: 62px;
  --content-width: 1280px;
  --reading-width: 820px;
  --gutter: 30px;
  --section-space: 72px;
  --transition-fast: 160ms ease;
  --transition-main: 280ms cubic-bezier(0.22, 0.7, 0.3, 1);
  --paper-noise: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='180' height='180'><filter id='p'><feTurbulence type='fractalNoise' baseFrequency='.82' numOctaves='2' stitchTiles='stitch'/><feColorMatrix type='saturate' values='0'/></filter><rect width='180' height='180' filter='url(%23p)' opacity='.045'/></svg>");
}

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

html {
  overflow-x: clip;
  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;
}

body::before {
  position: fixed;
  z-index: 0;
  inset: 0;
  background-image: var(--paper-noise);
  content: "";
  pointer-events: none;
}

header,
main,
footer {
  position: relative;
  z-index: 1;
}

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

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

button,
summary {
  cursor: pointer;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  color: var(--color-accent-dark);
}

a,
button,
summary,
[role="tab"],
select,
input,
textarea {
  border-radius: var(--radius-xs);
}

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

p,
ul,
ol,
dl,
blockquote,
pre,
table {
  margin-top: 0;
  margin-bottom: 1.2em;
}

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

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

h1,
.hero-title {
  margin-bottom: 22px;
  font-size: clamp(52px, 5vw, 72px);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.02em;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(30px, 3vw, 44px);
  font-weight: 850;
  line-height: 1.18;
  letter-spacing: -0.015em;
}

h3 {
  margin-bottom: 12px;
  font-size: clamp(20px, 2vw, 25px);
  font-weight: 800;
  line-height: 1.3;
}

h4 {
  margin-bottom: 8px;
  font-size: 17px;
  font-weight: 750;
}

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

code {
  overflow-wrap: anywhere;
}

pre {
  max-width: 100%;
  padding: 18px;
  overflow-x: auto;
  border: 1px solid var(--color-ink-edge);
  border-radius: var(--radius-md);
  background: var(--color-ink);
  color: var(--color-ink-text);
  -webkit-overflow-scrolling: touch;
}

hr {
  margin: 36px 0;
  border: 0;
  border-top: 1px solid var(--color-border);
}

.wrap {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--content-width);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

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

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

.section-compact {
  padding-top: 42px;
  padding-bottom: 42px;
}

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

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

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

.accent-text,
.h1-highlight {
  color: var(--color-accent);
}

.eyebrow,
.badge,
.fact-pill,
.status-label {
  display: inline-flex;
  min-height: 28px;
  max-width: 100%;
  align-items: center;
  gap: 8px;
  padding: 4px 12px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-panel);
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.45;
}

.status-dot,
.badge-dot {
  width: 7px;
  height: 7px;
  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);
}

.button,
.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 var(--color-transparent);
  border-radius: var(--radius-md);
  font-weight: 750;
  line-height: 1.2;
  text-align: center;
  transition: color var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.btn-primary {
  padding: 13px 36px;
  background: var(--color-accent);
  box-shadow: var(--shadow-button);
  color: var(--color-white);
}

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

.btn-secondary {
  padding: 12px 30px;
  border-color: var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
}

.btn-secondary:hover {
  border-color: var(--color-muted);
  background: var(--color-panel);
  color: var(--color-text);
}

.btn-dark {
  padding: 11px 22px;
  background: var(--color-text);
  color: var(--color-bg);
}

.btn-dark:hover {
  background: var(--color-accent-dark);
  color: var(--color-white);
}

.btn-small {
  min-height: 38px;
  padding: 8px 15px;
  border-color: var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 13px;
}

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

.button[aria-disabled="true"],
button:disabled {
  cursor: not-allowed;
  opacity: 0.52;
  transform: none;
}

.button-row,
.cta-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.panel,
.card {
  min-width: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-panel);
}

.card {
  padding: 24px;
  box-shadow: var(--shadow-card);
}

.surface-strong {
  background: var(--color-panel-strong);
}

.prose {
  min-width: 0;
  color: var(--color-text);
}

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

.prose h2,
.prose h3,
.prose section[id] {
  scroll-margin-top: calc(var(--header-height) + 76px);
}

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

.prose a:hover {
  text-decoration-color: var(--color-accent);
}

.reveal {
  transition: opacity 560ms ease, transform 560ms cubic-bezier(0.22, 0.7, 0.3, 1);
}

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

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

.masthead {
  position: relative;
  z-index: 50;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
}

.masthead-inner {
  position: relative;
  z-index: 60;
  display: flex;
  height: var(--header-height);
  align-items: center;
  gap: 18px;
}

.brand-mark {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 9px;
  color: var(--color-text);
}

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

.brand-mark img {
  width: 28px;
  height: 28px;
}

.brand-word {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.brand-local {
  color: var(--color-muted);
  font-size: 12px;
  font-weight: 600;
}

.desktop-nav {
  display: flex;
  min-width: 0;
  flex: 1;
  align-items: center;
  gap: 1px;
}

.desktop-nav a {
  display: inline-flex;
  min-height: 34px;
  align-items: center;
  gap: 6px;
  padding: 6px 9px;
  border-radius: var(--radius-sm);
  color: var(--color-muted);
  font-size: 13px;
  font-weight: 550;
  white-space: nowrap;
}

.desktop-nav a svg {
  width: 14px;
  height: 14px;
  flex: 0 0 auto;
}

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

.desktop-nav a.is-active {
  background: var(--color-accent-soft);
  color: var(--color-accent-dark);
  font-weight: 750;
}

.header-tools {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 10px;
}

.header-login {
  display: inline-flex;
  min-height: 38px;
  align-items: center;
  justify-content: center;
  padding: 7px 18px;
  border-radius: var(--radius-sm);
  background: var(--color-text);
  color: var(--color-bg);
  font-size: 13px;
  font-weight: 750;
}

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

.language-control {
  position: relative;
}

.language-button {
  display: inline-flex;
  min-width: 44px;
  min-height: 38px;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 6px 9px;
  border: 0;
  background: var(--color-transparent);
  color: var(--color-muted);
  font-size: 13px;
}

.language-menu {
  position: absolute;
  z-index: 70;
  top: calc(100% + 9px);
  right: 0;
  display: none;
  width: 150px;
  padding: 6px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  box-shadow: var(--shadow-card);
}

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

.language-menu a {
  display: flex;
  min-height: 38px;
  align-items: center;
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-size: 13px;
}

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

.menu-toggle svg {
  width: 20px;
  height: 20px;
}

.mobile-drawer {
  position: absolute;
  z-index: 65;
  top: 100%;
  right: 0;
  left: 0;
  display: none;
  max-height: calc(100dvh - var(--header-height));
  padding: 10px var(--gutter) 18px;
  overflow-y: auto;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
  overscroll-behavior: contain;
}

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

.mobile-drawer a {
  display: flex;
  width: 100%;
  min-height: 46px;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: var(--color-text);
}

.mobile-drawer a svg {
  width: 16px;
  height: 16px;
  flex: 0 0 auto;
}

.mobile-drawer a:hover,
.mobile-drawer a.is-active {
  background: var(--color-panel);
  color: var(--color-accent-dark);
}

.drawer-languages {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--color-border);
}

.menu-veil {
  position: fixed;
  z-index: 40;
  inset: var(--header-height) 0 0;
  display: none;
  border: 0;
  background: var(--color-accent-soft);
}

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

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

.footer-grid {
  display: grid;
  grid-template-columns: 1.35fr 1fr 1fr 0.8fr;
  gap: 32px;
  padding-top: 48px;
  padding-bottom: 36px;
}

.footer-brand p {
  max-width: 330px;
  margin-top: 14px;
  color: var(--color-muted);
}

.footer-title {
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 650;
  letter-spacing: 0.06em;
  color: var(--color-muted);
}

.footer-links {
  display: grid;
  gap: 7px;
}

.footer-links a {
  min-height: 28px;
  color: var(--color-text);
  font-size: 13px;
}

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

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding-top: 18px;
  padding-bottom: 22px;
  border-top: 1px solid var(--color-border);
  color: var(--color-muted);
  font-size: 12px;
}

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

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

@media (max-width: 1160px) {
  .desktop-nav a {
    padding-inline: 6px;
    font-size: 12px;
  }

  .brand-local {
    display: none;
  }
}

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

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

  .language-control {
    display: none;
  }

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

  .footer-grid {
    grid-template-columns: 1.2fr 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --gutter: 20px;
    --section-space: 54px;
  }

  h1,
  .hero-title {
    font-size: clamp(28px, 9.5vw, 40px);
    line-height: 1.12;
  }

  h2 {
    font-size: clamp(26px, 8vw, 34px);
  }

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

  .tilt-card,
  [data-tilt] {
    transform: none;
  }
}

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

  .masthead-inner {
    gap: 10px;
  }

  .brand-local {
    display: none;
  }

  .header-login {
    min-height: 40px;
    padding-inline: 13px;
  }

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

  .btn-primary,
  .btn-secondary {
    flex: 1 1 132px;
    padding-inline: 18px;
  }

  .card {
    padding: 19px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

  .decorative-tilt,
  .device-card,
  [class*="tilted"] {
    transform: none;
  }

  .absolute-decoration,
  .hero-orb,
  .watermark {
    display: 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;
  }
}