:root {
  --color-page: #F7FAFA;
  --color-panel: #FFFFFF;
  --color-panel-soft: #EFF5F2;
  --color-line: #E2EAE6;
  --color-brand: #0DA271;
  --color-brand-deep: #087954;
  --color-brand-soft: #E3F4EC;
  --color-ink: #1B2622;
  --color-ink-muted: #5E6D67;
  --color-success: #0DA271;
  --color-warning: #D9820B;
  --color-danger: #D93B3B;
  --color-window-close: #EF6A5E;
  --color-window-min: #F4BD4E;
  --color-window-max: #5CC46E;
  --color-wash-mint: rgba(13, 162, 113, 0.10);
  --color-wash-blue: rgba(96, 152, 205, 0.09);
  --color-overlay: rgba(27, 38, 34, 0.42);
  --color-focus: rgba(13, 162, 113, 0.28);
  --font-display: 'Inter', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Inter', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, 'Courier New', monospace;
  --radius-xs: 8px;
  --radius-sm: 10px;
  --radius-button: 14px;
  --radius-row: 14px;
  --radius-card: 20px;
  --radius-window: 24px;
  --radius-section: 28px;
  --radius-pill: 999px;
  --shadow-near: 0 20px 38px -16px rgba(8, 72, 50, 0.24);
  --shadow-far: 0 56px 110px -36px rgba(20, 56, 44, 0.18);
  --shadow-card: 0 12px 28px -12px rgba(20, 56, 44, 0.16);
  --shadow-float: 0 16px 34px -12px rgba(8, 72, 50, 0.22);
  --shadow-button: 0 10px 22px -8px rgba(13, 162, 113, 0.45);
  --shadow-focus: 0 0 0 4px var(--color-focus);
  --content-max: 1160px;
  --header-max: 1280px;
  --gutter: clamp(16px, 4vw, 40px);
  --header-height: 76px;
  --section-space: clamp(72px, 9vw, 128px);
  --transition-fast: 150ms ease;
  --transition-reveal: 620ms cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  min-width: 320px;
  scroll-behavior: smooth;
  color-scheme: light;
}

html.nav-open {
  overflow: hidden;
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  overflow-x: clip;
  color: var(--color-ink);
  background:
    radial-gradient(1100px 640px at 6% -8%, var(--color-wash-mint), transparent 60%),
    radial-gradient(920px 560px at 40% -4%, var(--color-wash-blue), transparent 62%),
    var(--color-page);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.72;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

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

svg[aria-hidden="true"] {
  flex-shrink: 0;
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  border: 0;
}

a {
  color: var(--color-brand-deep);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--color-brand);
}

p,
ul,
ol,
dl,
blockquote,
pre,
table {
  margin-top: 0;
  margin-bottom: 1.25em;
}

ul,
ol {
  padding-left: 1.4em;
}

h1,
h2,
h3,
h4 {
  margin-top: 0;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.01em;
  text-wrap: balance;
}

h1 {
  margin-bottom: 22px;
  font-size: clamp(34px, 3.3vw, 48px);
}

h2 {
  margin-bottom: 20px;
  font-size: clamp(28px, 3vw, 40px);
}

h3 {
  margin-bottom: 14px;
  font-size: clamp(20px, 2vw, 26px);
}

h4 {
  margin-bottom: 10px;
  font-size: 18px;
}

.heading-keep,
.term-keep {
  white-space: nowrap;
}

strong {
  color: var(--color-ink);
  font-weight: 700;
}

small {
  color: var(--color-ink-muted);
}

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

:not(pre) > code {
  max-width: 100%;
  padding: 0.16em 0.4em;
  overflow-wrap: anywhere;
  color: var(--color-brand-deep);
  background: var(--color-brand-soft);
  border-radius: var(--radius-xs);
  font-size: 0.9em;
}

pre {
  max-width: 100%;
  padding: 20px;
  overflow-x: auto;
  color: var(--color-panel);
  background: var(--color-ink);
  border-radius: var(--radius-button);
  font: 14px/1.7 var(--font-mono);
  -webkit-overflow-scrolling: touch;
}

pre code {
  color: inherit;
  white-space: pre;
}

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

:focus-visible {
  outline: 2px solid var(--color-brand);
  outline-offset: 3px;
}

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

.wide-wrap {
  width: 100%;
  max-width: min(100%, calc(var(--header-max) + 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--white {
  color: var(--color-ink);
  background: var(--color-panel);
}

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

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

.section-head--center {
  margin-inline: auto;
  text-align: center;
}

.kicker,
.eyebrow {
  display: inline-flex;
  max-width: 100%;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
  padding: 7px 15px;
  color: var(--color-brand-deep);
  background: var(--color-panel);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-card);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.4;
}

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

.lead {
  color: var(--color-ink-muted);
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.72;
}

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

.panel,
.card {
  color: var(--color-ink);
  background: var(--color-panel);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
}

.panel {
  padding: clamp(22px, 4vw, 38px);
}

.card {
  padding: clamp(20px, 3vw, 30px);
}

.card--raised {
  box-shadow: var(--shadow-near), var(--shadow-far);
}

.grid {
  display: grid;
  gap: 24px;
}

.grid > * {
  min-width: 0;
}

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

.grid--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.button,
.btn {
  display: inline-flex;
  min-height: 48px;
  max-width: 100%;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 12px 24px;
  color: var(--color-panel);
  background: var(--color-brand);
  border: 1px solid var(--color-brand);
  border-radius: var(--radius-button);
  box-shadow: var(--shadow-button);
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.3;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: transform var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast);
}

.button svg,
.btn svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.button:hover,
.btn:hover {
  color: var(--color-panel);
  background: var(--color-brand-deep);
  border-color: var(--color-brand-deep);
  transform: translateY(-1px);
}

.button:active,
.btn:active {
  transform: translateY(0);
  box-shadow: none;
}

.button--secondary,
.btn-ghost {
  color: var(--color-ink);
  background: var(--color-panel);
  border-color: var(--color-line);
  box-shadow: var(--shadow-card);
}

.button--secondary:hover,
.btn-ghost:hover {
  color: var(--color-ink);
  background: var(--color-panel-soft);
  border-color: var(--color-brand);
}

.button--quiet {
  min-height: 42px;
  padding: 9px 16px;
  color: var(--color-brand-deep);
  background: var(--color-brand-soft);
  border-color: var(--color-brand-soft);
  box-shadow: none;
}

.button--quiet:hover {
  color: var(--color-panel);
}

.button[disabled],
.button.is-disabled {
  color: var(--color-ink-muted);
  background: var(--color-panel-soft);
  border-color: var(--color-line);
  box-shadow: none;
  cursor: not-allowed;
  opacity: 0.72;
  transform: none;
}

.badge {
  display: inline-flex;
  max-width: 100%;
  align-items: center;
  gap: 7px;
  padding: 6px 11px;
  overflow: hidden;
  color: var(--color-ink);
  background: var(--color-panel-soft);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.35;
}

.badge--brand {
  color: var(--color-brand-deep);
  background: var(--color-brand-soft);
  border-color: var(--color-brand-soft);
}

.badge--warning {
  color: var(--color-ink);
  background: var(--color-panel);
  border-color: var(--color-warning);
}

.badge--danger {
  color: var(--color-danger);
  background: var(--color-panel);
  border-color: var(--color-danger);
}

.data-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  color: var(--color-ink);
  background: var(--color-panel);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-button);
}

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

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

.data-table tr:last-child td {
  border-bottom: 0;
}

.table-scroll {
  max-width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-button);
  -webkit-overflow-scrolling: touch;
}

.table-scroll .data-table {
  min-width: 640px;
}

.prose {
  max-width: 780px;
}

.prose > * {
  min-width: 0;
}

.prose h2 {
  margin-top: 2.1em;
}

.prose h3 {
  margin-top: 1.65em;
}

.prose img {
  height: auto;
  border-radius: var(--radius-card);
}

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

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--transition-reveal), transform var(--transition-reveal);
}

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

.tilt {
  transform: rotate(-2deg);
}

.decorated-section,
.hero,
.preview-hero {
  position: relative;
  overflow-x: clip;
}

.site-head {
  position: relative;
  z-index: 50;
  min-height: var(--header-height);
}

.head-inner {
  width: 100%;
  max-width: min(100%, calc(1280px + var(--gutter) * 2));
  min-height: var(--header-height);
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: flex;
  align-items: center;
  gap: 28px;
}

.brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 11px;
  color: var(--color-ink);
  text-decoration: none;
}

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

.brand-mark {
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 16px;
}

.nav-item {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  gap: 7px;
  padding: 9px 14px;
  color: var(--color-ink-muted);
  border-radius: var(--radius-pill);
  font-size: 14.5px;
  font-weight: 600;
  text-decoration: none;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-item svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.nav-item:hover {
  color: var(--color-ink);
  background: var(--color-panel-soft);
}

.nav-item.is-active {
  color: var(--color-brand-deep);
  background: var(--color-brand-soft);
}

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

.lang-menu {
  position: relative;
}

.lang-trigger {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  gap: 6px;
  padding: 8px 15px;
  color: var(--color-ink-muted);
  background: var(--color-panel);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  cursor: pointer;
}

.lang-trigger:hover {
  color: var(--color-ink);
}

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

.lang-caret {
  font-size: 10px;
}

.lang-popover {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  width: 184px;
  padding: 8px;
  color: var(--color-ink);
  background: var(--color-panel);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-button);
  box-shadow: var(--shadow-float);
}

.lang-popover[hidden] {
  display: none;
}

.lang-popover a {
  display: flex;
  min-height: 42px;
  align-items: center;
  width: 100%;
  padding: 9px 11px;
  color: var(--color-ink-muted);
  border-radius: var(--radius-sm);
  text-decoration: none;
}

.lang-popover a:hover,
.lang-popover a[aria-current="true"] {
  color: var(--color-brand-deep);
  background: var(--color-brand-soft);
}

.menu-toggle {
  display: none;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  color: var(--color-ink);
  background: var(--color-panel);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-button);
  cursor: pointer;
}

.menu-toggle svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-width: 2;
}

.mobile-drawer {
  display: none;
}

.nav-veil {
  display: none;
}

.site-footer {
  padding-top: 64px;
  color: var(--color-ink);
  background: var(--color-panel);
  border-top: 1px solid var(--color-line);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(260px, 1.4fr) repeat(3, minmax(150px, 1fr));
  gap: 42px;
}

.footer-brand p {
  max-width: 410px;
  margin-top: 18px;
  color: var(--color-ink-muted);
}

.footer-title {
  margin-bottom: 16px;
  font-size: 14px;
  font-weight: 800;
}

.footer-links {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-links a {
  display: inline-flex;
  min-height: 32px;
  align-items: center;
  color: var(--color-ink-muted);
  text-decoration: none;
}

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

.footer-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-ink-muted);
  font-size: 13px;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 48px;
  padding-top: 22px;
  padding-bottom: 26px;
  color: var(--color-ink-muted);
  border-top: 1px solid var(--color-line);
  font-size: 13px;
}

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

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

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

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

  .mobile-drawer {
    position: fixed;
    z-index: 70;
    top: var(--header-height);
    right: var(--gutter);
    left: var(--gutter);
    display: block;
    max-height: calc(100dvh - var(--header-height) - 16px);
    padding: 12px;
    overflow-y: auto;
    color: var(--color-ink);
    background: var(--color-panel);
    border: 1px solid var(--color-line);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-near), var(--shadow-far);
    overscroll-behavior: contain;
  }

  .mobile-drawer[hidden] {
    display: none;
  }

  .mobile-drawer a {
    display: flex;
    width: 100%;
    min-height: 48px;
    align-items: center;
    gap: 10px;
    padding: 11px 14px;
    color: var(--color-ink-muted);
    border-radius: var(--radius-sm);
    text-decoration: none;
  }

  .mobile-drawer a svg {
    width: 18px;
    height: 18px;
    fill: none;
    stroke: currentColor;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-width: 1.8;
  }

  .mobile-drawer a:hover,
  .mobile-drawer a.is-active {
    color: var(--color-brand-deep);
    background: var(--color-brand-soft);
  }

  .drawer-label {
    margin: 12px 14px 5px;
    color: var(--color-ink-muted);
    font-size: 12px;
    font-weight: 800;
  }

  .drawer-divider {
    height: 1px;
    margin: 10px 4px;
    background: var(--color-line);
  }

  .nav-veil {
    position: fixed;
    z-index: 40;
    inset: var(--header-height) 0 0;
    display: block;
    background: var(--color-overlay);
  }

  .nav-veil[hidden] {
    display: none;
  }

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

@media (max-width: 768px) {
  h1 {
    font-size: clamp(24px, 7.2vw, 30px);
    line-height: 1.16;
  }

  h2 {
    font-size: clamp(24px, 6.4vw, 32px);
  }

  .grid--2,
  .grid--3 {
    grid-template-columns: 1fr;
  }

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

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

@media (max-width: 640px) {
  :root {
    --header-height: 68px;
    --section-space: 70px;
  }

  body {
    font-size: 15.5px;
  }

  .wrap,
  .wide-wrap,
  .head-inner {
    padding-inline: var(--gutter);
  }

  .head-inner {
    gap: 10px;
  }

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

  .brand-mark {
    width: 34px;
    height: 34px;
  }

  .lang-trigger {
    min-width: 44px;
    justify-content: center;
    padding-inline: 10px;
  }

  .lang-trigger-full {
    display: none;
  }

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

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

  .button,
  .btn {
    min-height: 46px;
    padding-inline: 18px;
  }

  .cluster {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .data-table th,
  .data-table td {
    padding: 12px;
  }
}

@media (max-width: 380px) {
  .brand-name {
    font-size: 14px;
  }

  .head-tools {
    gap: 6px;
  }

  .lang-trigger {
    padding-inline: 8px;
  }
}

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

  *,
  *::before,
  *::after {
    animation: none !important;
    scroll-behavior: auto !important;
    transition: none !important;
  }

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