:root {
  --color-bg: #FFFFFF;
  --color-panel: #F7F9FC;
  --color-panel-strong: #EEF2F8;
  --color-border: #D9E0EA;
  --color-accent: #0047AB;
  --color-accent-dark: #00306F;
  --color-text: #121721;
  --color-muted: #5B6572;
  --color-success: #0E8A4F;
  --color-warning: #B77400;
  --color-error: #C0361F;
  --color-on-accent: #FFFFFF;
  --color-on-accent-strong: rgba(255, 255, 255, .92);
  --color-on-accent-soft: rgba(255, 255, 255, .78);
  --color-on-accent-faint: rgba(255, 255, 255, .5);
  --color-on-accent-line: rgba(255, 255, 255, .38);
  --color-on-accent-hair: rgba(255, 255, 255, .26);
  --color-on-accent-tint: rgba(255, 255, 255, .1);
  --color-highlight-band: rgba(255, 255, 255, .24);
  --color-hero-core: rgba(255, 255, 255, .15);
  --color-hero-vignette: rgba(0, 42, 99, .6);
  --color-button-shadow: rgba(0, 26, 64, .38);
  --color-ink-shadow: rgba(18, 23, 33, .1);
  --color-accent-wash: rgba(0, 71, 171, .08);
  --color-accent-line: rgba(0, 71, 171, .22);
  --color-success-wash: rgba(14, 138, 79, .1);
  --color-warning-wash: rgba(183, 116, 0, .1);
  --color-error-wash: rgba(192, 54, 31, .1);
  --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, 'SF Mono', Consolas, monospace;
  --radius-xs: 4px;
  --radius-s: 6px;
  --radius-m: 10px;
  --radius-l: 26px;
  --radius-pill: 999px;
  --wrap: 1240px;
  --wrap-wide: 1408px;
  --wrap-prose: 820px;
  --gutter: clamp(16px, 4vw, 32px);
  --header-height: 64px;
  --section-space: clamp(72px, 9vw, 128px);
  --transition-fast: 150ms ease;
}

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

html {
  color-scheme: light;
  scroll-behavior: smooth;
  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: 16px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

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

svg[data-decorative-full] {
  width: 100%;
  height: 100%;
}

img {
  height: auto;
}

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

button,
input,
select,
textarea {
  margin: 0;
  color: inherit;
  font: inherit;
}

button {
  border: 0;
  background: none;
  cursor: pointer;
}

ul,
ol {
  margin: 0;
  padding: 0;
}

ul[role="list"],
.clean-list {
  list-style: none;
}

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

p:last-child {
  margin-bottom: 0;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible,
[role="tab"]:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-s);
}

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

.wrap {
  width: 100%;
  max-width: calc(var(--wrap) + (var(--gutter) * 2));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.wrap-wide {
  width: 100%;
  max-width: calc(var(--wrap-wide) + (var(--gutter) * 2));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.prose {
  width: 100%;
  max-width: calc(var(--wrap-prose) + (var(--gutter) * 2));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

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

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

.section-head {
  max-width: 760px;
  margin-bottom: clamp(32px, 5vw, 56px);
}

.eyebrow {
  margin-bottom: 12px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .11em;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 20px;
  font-size: clamp(34px, 4.4vw, 48px);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -.016em;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(28px, 3.2vw, 40px);
  font-weight: 750;
  line-height: 1.18;
  letter-spacing: -.012em;
}

h3 {
  margin-bottom: 12px;
  font-size: clamp(20px, 2vw, 25px);
  font-weight: 700;
  line-height: 1.28;
}

h4 {
  margin-bottom: 10px;
  font-size: 1.05rem;
  line-height: 1.35;
}

.title-keep,
.no-break {
  white-space: nowrap;
}

.lead {
  max-width: 720px;
  color: var(--color-muted);
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.72;
}

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

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

code,
kbd,
samp {
  font-family: var(--font-mono);
  font-size: .9em;
}

:not(pre) > code {
  padding: .12em .38em;
  overflow-wrap: anywhere;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xs);
  background: var(--color-panel);
  color: var(--color-accent-dark);
}

pre {
  max-width: 100%;
  padding: 20px;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-m);
  background: var(--color-text);
  color: var(--color-on-accent);
  line-height: 1.7;
  -webkit-overflow-scrolling: touch;
}

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

.btn {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 11px 20px;
  border: 1px solid transparent;
  border-radius: var(--radius-s);
  font-weight: 700;
  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:hover {
  transform: translateY(-1px);
}

.btn--primary {
  border-color: var(--color-accent);
  background: var(--color-accent);
  color: var(--color-on-accent);
}

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

.btn--outline {
  border-color: var(--color-accent);
  background: var(--color-bg);
  color: var(--color-accent);
}

.btn--outline:hover {
  background: var(--color-accent-wash);
}

.btn--quiet {
  border-color: var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
}

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

.btn[disabled],
.btn.is-disabled {
  cursor: not-allowed;
  opacity: .5;
  transform: none;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

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

.panel {
  padding: clamp(22px, 4vw, 40px);
}

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

.card:hover {
  border-color: var(--color-accent-line);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--color-border);
  border-left: 1px solid var(--color-border);
}

.card-grid > * {
  min-width: 0;
  padding: clamp(22px, 3vw, 36px);
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.icon,
.status-dot,
.card-icon,
.platform-icon,
.app-logo {
  flex-shrink: 0;
}

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

.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-bg);
  font-size: .95rem;
}

.data-table th,
.data-table td {
  min-width: 140px;
  padding: 14px 16px;
  border: 1px solid var(--color-border);
  text-align: left;
  vertical-align: top;
}

.data-table th {
  background: var(--color-panel);
  font-weight: 700;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 480ms ease, transform 480ms ease;
}

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

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

.head-in {
  position: relative;
  z-index: 3;
  display: flex;
  width: 100%;
  max-width: var(--wrap-wide);
  height: var(--header-height);
  margin-inline: auto;
  padding-inline: 24px;
  align-items: center;
  gap: 36px;
  background: var(--color-bg);
}

.brand {
  display: inline-flex;
  min-width: max-content;
  align-items: center;
  gap: 10px;
  font-size: 17px;
  font-weight: 750;
  letter-spacing: .01em;
}

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

.desktop-nav > ul {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
}

.desktop-nav a,
.nav-more > button {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  gap: 6px;
  padding: 8px 13px;
  border-radius: var(--radius-s);
  font-size: 15px;
}

.desktop-nav a:hover,
.nav-more > button:hover {
  background: var(--color-panel-strong);
}

.desktop-nav a.is-active,
.nav-more.is-active > button {
  border-radius: var(--radius-s) var(--radius-s) 0 0;
  box-shadow: inset 0 -2px 0 var(--color-accent);
  color: var(--color-accent);
  font-weight: 650;
}

.nav-more,
.lang-switch {
  position: relative;
}

.caret {
  width: 10px;
  height: 10px;
  flex-shrink: 0;
}

.caret path {
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.nav-drop,
.lang-menu {
  position: absolute;
  top: calc(100% + 6px);
  visibility: hidden;
  min-width: 172px;
  padding: 6px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-m);
  background: var(--color-bg);
  box-shadow: 0 10px 28px var(--color-ink-shadow);
  opacity: 0;
}

.nav-drop {
  left: 0;
}

.lang-menu {
  right: 0;
}

.nav-more:hover .nav-drop,
.nav-more:focus-within .nav-drop,
.nav-more.is-open .nav-drop,
.lang-switch.is-open .lang-menu {
  visibility: visible;
  opacity: 1;
}

.nav-drop li,
.lang-menu li {
  list-style: none;
}

.nav-drop a,
.lang-menu a {
  display: flex;
  min-height: 40px;
  align-items: center;
  padding: 8px 12px;
  border-radius: var(--radius-s);
  font-size: 14px;
}

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

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

.lang-button {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  gap: 6px;
  padding: 7px 10px;
  border-radius: var(--radius-s);
  color: var(--color-muted);
  white-space: nowrap;
}

.lang-button:hover {
  background: var(--color-panel-strong);
  color: var(--color-text);
}

.lang-label-short {
  display: none;
}

.head-cta {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  justify-content: center;
  padding: 8px 18px;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-s);
  color: var(--color-accent);
  font-size: 14px;
  font-weight: 700;
}

.head-cta:hover {
  background: var(--color-accent);
  color: var(--color-on-accent);
}

.menu-toggle {
  display: none;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-s);
}

.menu-toggle:hover {
  background: var(--color-panel-strong);
}

.menu-toggle-lines {
  position: relative;
  width: 20px;
  height: 14px;
}

.menu-toggle-lines::before,
.menu-toggle-lines::after,
.menu-toggle-lines span {
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  border-radius: var(--radius-pill);
  background: var(--color-text);
  content: "";
}

.menu-toggle-lines::before {
  top: 0;
}

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

.menu-toggle-lines::after {
  top: 12px;
}

.mobile-drawer {
  position: fixed;
  z-index: 4;
  top: var(--header-height);
  right: 0;
  display: none;
  width: min(420px, 100%);
  max-height: calc(100dvh - var(--header-height));
  overflow-y: auto;
  overscroll-behavior: contain;
  border-top: 1px solid var(--color-border);
  border-left: 1px solid var(--color-border);
  background: var(--color-bg);
  -webkit-overflow-scrolling: touch;
}

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

.mobile-drawer ul {
  list-style: none;
}

.mobile-drawer a {
  display: flex;
  width: 100%;
  min-height: 48px;
  align-items: center;
  padding: 12px 20px;
  border-bottom: 1px solid var(--color-border);
}

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

.mobile-drawer-title {
  padding: 18px 20px 8px;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .08em;
}

.nav-veil {
  position: fixed;
  z-index: 1;
  inset: var(--header-height) 0 0;
  display: none;
  border: 0;
  background: var(--color-ink-shadow);
}

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

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

.footer-main {
  display: grid;
  grid-template-columns: 1.25fr .8fr 1.4fr .8fr;
  gap: clamp(28px, 5vw, 64px);
  padding-top: 64px;
  padding-bottom: 52px;
}

.footer-brand p {
  max-width: 340px;
  margin-top: 18px;
  color: var(--color-muted);
}

.footer-title {
  margin-bottom: 14px;
  font-size: .92rem;
  font-weight: 750;
}

.footer-links {
  display: grid;
  gap: 8px;
  list-style: none;
}

.footer-links a {
  color: var(--color-muted);
  font-size: .93rem;
}

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

.footer-keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
}

.footer-keywords a {
  display: inline-flex;
  max-width: 100%;
  padding: 5px 9px;
  overflow-wrap: anywhere;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-s);
  background: var(--color-bg);
  color: var(--color-muted);
  font-size: .82rem;
}

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

.footer-bottom {
  display: flex;
  padding-top: 20px;
  padding-bottom: 24px;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-top: 1px solid var(--color-border);
  color: var(--color-muted);
  font-size: .86rem;
}

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

@media (max-width: 1080px) {
  .desktop-nav {
    display: none;
  }

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

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

  .head-cta {
    display: none;
  }

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

@media (max-width: 768px) {
  h1 {
    font-size: clamp(24px, 7.4vw, 30px);
    line-height: 1.16;
    letter-spacing: -.012em;
  }

  h2 {
    font-size: clamp(25px, 7vw, 32px);
  }

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

  .card-grid {
    grid-template-columns: 1fr;
  }

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

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

@media (max-width: 640px) {
  .head-in {
    padding-inline: 16px;
    gap: 10px;
  }

  .brand span {
    display: none;
  }

  .head-tools {
    margin-left: auto;
    gap: 4px;
  }

  .lang-label-long {
    display: none;
  }

  .lang-label-short {
    display: inline;
  }

  .lang-button {
    min-width: 44px;
    justify-content: center;
    padding-inline: 7px;
  }

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

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

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

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto;
    transition-duration: .01ms;
    animation-duration: .01ms;
    animation-iteration-count: 1;
  }

  .reveal {
    transform: none;
  }
}