:root {
  --blue: #6a9fc1;
  --blue-light: #96bdd6;
  --blue-pale: #ebf3f8;
  --blue-deep: #2e6588;
  --accent-rgb: 106, 159, 193;
  --accent-light-rgb: 212, 229, 240;
  --ink-rgb: 23, 38, 53;
  --bg: #fcfdfd;
  --bg-subtle: #f4f7fa;
  --bg-card: rgba(255, 255, 255, 0.96);
  --bg-card-hover: rgba(255, 255, 255, 1);
  --reading-width: 820px;
  --reading-width-wide: 960px;
  --text-primary: #172635;
  --text-secondary: #506577;
  --text-muted: #788997;
  --border: rgba(var(--accent-rgb), 0.14);
  --border-strong: rgba(var(--accent-rgb), 0.22);
  --border-soft: rgba(var(--accent-rgb), 0.09);
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: "SF Mono", "Menlo", "Monaco", "Consolas", monospace;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--sans);
  color: var(--text-primary);
  background:
    radial-gradient(circle at top, rgba(var(--accent-light-rgb), 0.42) 0%, rgba(var(--accent-light-rgb), 0) 34%),
    linear-gradient(180deg, #fdfefe 0%, #fafcfd 22%, #f4f7fa 100%);
  -webkit-font-smoothing: antialiased;
  line-height: 1.7;
}

a {
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.tn,
.topnav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 32px;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: all 0.3s ease;
}

.tn {
  height: 64px;
}

.topnav {
  height: 64px;
}

.tn a.tn-b,
.topnav-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}

.tn .tn-l,
.topnav-logo {
  height: 36px;
  border-radius: 6px;
}

.tn .tn-n,
.topnav-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
}

.tn .tn-r,
.topnav-links {
  display: flex;
  align-items: center;
  gap: 20px;
}

.tn .tn-r a,
.topnav-links a {
  color: rgba(var(--ink-rgb), 0.72);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  padding: 0;
  border: none;
  border-radius: 0;
}

.tn .tn-r a:hover,
.topnav-links a:hover {
  color: var(--blue-deep);
}

.lang-select-wrap {
  position: relative;
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
}

.lang-select-wrap::after {
  content: "";
  position: absolute;
  right: 12px;
  top: 50%;
  width: 6px;
  height: 6px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  color: var(--blue-deep);
  pointer-events: none;
  transform: translateY(-65%) rotate(45deg);
}

.lang-select {
  width: 108px;
  min-height: 36px;
  padding: 7px 30px 7px 14px;
  border: 1px solid rgba(var(--accent-rgb), 0.14);
  border-radius: 999px;
  outline: none;
  appearance: none;
  -webkit-appearance: none;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 8px 24px rgba(var(--accent-rgb), 0.08);
  color: var(--blue-deep);
  cursor: pointer;
  direction: ltr;
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.2;
  transition:
    background-color 300ms cubic-bezier(0.34, 1.56, 0.64, 1),
    border-color 300ms cubic-bezier(0.34, 1.56, 0.64, 1),
    box-shadow 300ms cubic-bezier(0.34, 1.56, 0.64, 1),
    transform 300ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

.lang-select:hover,
.lang-select:focus-visible {
  background: rgba(255, 255, 255, 0.9);
  border-color: rgba(var(--accent-rgb), 0.18);
  box-shadow: 0 8px 24px rgba(var(--accent-rgb), 0.12);
  transform: translateY(-1px);
}

.lang-select:focus-visible {
  outline: none;
}

.tn .tn-r a.is-active,
.topnav-links a.is-active {
  color: var(--blue-deep);
  padding: 8px 18px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(var(--accent-rgb), 0.14);
  border-radius: 999px;
  box-shadow: 0 8px 24px rgba(var(--accent-rgb), 0.08);
  font-weight: 600;
}

.tn .tn-r a.nav-cta,
.topnav-links a.nav-cta {
  padding: 8px 18px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(var(--accent-rgb), 0.14);
  border-radius: 999px;
  color: var(--blue-deep);
  font-weight: 600;
  box-shadow: 0 8px 24px rgba(var(--accent-rgb), 0.08);
}

.lang-menu {
  position: relative;
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  direction: ltr;
}

.lang-trigger {
  min-height: 40px;
  padding: 0 11px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border: 0.5px solid rgba(255,255,255,0.48);
  border-radius: 10px;
  outline: none;
  background: rgba(255,255,255,0.58);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 1px 3px rgba(var(--ink-rgb), 0.04), 0 8px 18px rgba(var(--accent-rgb), 0.06);
  color: rgba(var(--ink-rgb), 0.68);
  cursor: pointer;
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
  transition:
    background-color 150ms ease,
    border-color 150ms ease,
    color 150ms ease,
    box-shadow 150ms ease,
    transform 150ms ease;
}

.lang-trigger:hover,
.lang-menu.open .lang-trigger {
  background: rgba(255,255,255,0.78);
  border-color: rgba(var(--accent-rgb), 0.14);
  color: var(--blue-deep);
  box-shadow: 0 2px 8px rgba(0,0,0,0.06), 0 8px 24px rgba(var(--accent-rgb), 0.08);
  transform: translateY(-1px);
}

.lang-trigger:focus-visible {
  box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.16), 0 2px 8px rgba(0,0,0,0.06);
}

.lang-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  opacity: 0.84;
}

.lang-chevron {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  opacity: 0.72;
  transition: transform 220ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

.lang-menu.open .lang-chevron {
  transform: rotate(180deg);
}

.lang-current {
  white-space: nowrap;
  direction: auto;
}

.lang-menu-list {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 220;
  min-width: 136px;
  padding: 6px;
  border: 0.5px solid rgba(255,255,255,0.55);
  border-radius: 12px;
  background: rgba(255,255,255,0.82);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 20px 40px rgba(var(--ink-rgb), 0.12), 0 8px 16px rgba(var(--ink-rgb), 0.06);
  opacity: 0;
  visibility: hidden;
  transform: scale(0.96) translateY(-4px);
  transform-origin: top right;
  transition:
    opacity 160ms ease,
    transform 220ms cubic-bezier(0.34, 1.56, 0.64, 1),
    visibility 160ms ease;
}

.lang-menu.open .lang-menu-list {
  opacity: 1;
  visibility: visible;
  transform: scale(1) translateY(0);
}

.tn .tn-r .lang-menu-list a,
.topnav-links .lang-menu-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 10px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  box-shadow: none;
  color: rgba(var(--ink-rgb), 0.72);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  line-height: 1.2;
  direction: auto;
  transition: background-color 150ms ease, color 150ms ease;
}

.tn .tn-r .lang-menu-list a:hover,
.topnav-links .lang-menu-list a:hover {
  background: rgba(var(--accent-rgb), 0.1);
  color: var(--blue-deep);
}

.tn .tn-r .lang-menu-list a.is-active,
.topnav-links .lang-menu-list a.is-active {
  padding: 9px 10px;
  border: 0;
  border-radius: 8px;
  background: rgba(var(--accent-rgb), 0.1);
  box-shadow: none;
  color: var(--blue-deep);
  font-weight: 600;
}

.tn .tn-r .lang-menu-list a.is-active::after,
.topnav-links .lang-menu-list a.is-active::after {
  content: '✓';
  font-size: 12px;
  color: var(--blue-deep);
}

.lang-menu:not(.open) .lang-menu-list a.is-active::after {
  content: none;
}

.lang-menu.open .lang-menu-list a.is-active::after {
  content: '✓';
}

.tn.scrolled,
.topnav.scrolled {
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(63,143,212,0.12);
  box-shadow: 0 10px 30px rgba(95,179,234,0.08);
}

.tn-burger,
.topnav-burger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.tn-burger span,
.topnav-burger span {
  display: block;
  width: 22px;
  height: 2px;
  margin: 5px 0;
  border-radius: 2px;
  background: var(--text-primary);
  transition: all 0.3s ease;
}

.sb {
  position: fixed;
  top: 64px;
  left: 0;
  bottom: 0;
  width: 240px;
  padding: 24px 16px;
  overflow-y: auto;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-right: 1px solid var(--border);
}

.sb .sb-t {
  padding: 0 12px;
  margin-bottom: 14px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.8px;
  text-transform: uppercase;
  color: var(--blue-deep);
  opacity: 0.72;
}

.sb a {
  display: block;
  margin-bottom: 6px;
  padding: 11px 14px;
  border-radius: 14px;
  border: 1px solid transparent;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
}

.sb a:hover {
  color: var(--text-primary);
  background: rgba(var(--accent-light-rgb), 0.22);
  border-color: var(--border);
}

.sb a.on {
  color: var(--blue-deep);
  background: rgba(var(--accent-light-rgb), 0.3);
  border-color: rgba(var(--accent-rgb), 0.22);
  font-weight: 600;
}

.m {
  margin-left: 240px;
  padding: 112px 80px 104px 64px;
  max-width: 1120px;
}

.docs-page .m {
  background: transparent;
  box-shadow: none;
}

.docs-page .m > :where(h1, h2, h3, p, ul, ol, hr, .tip) {
  max-width: var(--reading-width);
}

.docs-page .m > :where(pre, table, .page-lead) {
  max-width: var(--reading-width-wide);
}

.page-lead {
  position: relative;
  margin-bottom: 56px;
  padding: 28px 30px;
  border: 1px solid rgba(var(--accent-rgb), 0.16);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 18px 40px rgba(var(--accent-rgb), 0.08);
  overflow: hidden;
}

.page-kicker {
  margin-bottom: 10px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--blue-deep);
  opacity: 0.76;
}

.m h1 {
  margin-bottom: 12px;
  font-size: 40px;
  font-weight: 800;
  letter-spacing: -0.8px;
  color: var(--text-primary);
}

.m .sub {
  margin-bottom: 48px;
  max-width: 720px;
  font-size: 19px;
  line-height: 1.8;
  color: var(--text-secondary);
}

.m h2 {
  margin-top: 64px;
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  font-size: 30px;
  font-weight: 700;
  color: var(--text-primary);
}

.m h3 {
  margin-top: 32px;
  margin-bottom: 12px;
  font-size: 22px;
  font-weight: 600;
  color: var(--text-primary);
}

.m p,
.m li {
  font-size: 17px;
  line-height: 1.9;
  color: var(--text-secondary);
}

.m p {
  margin-bottom: 16px;
}

.m ul,
.m ol {
  margin-bottom: 16px;
  padding-left: 22px;
}

.m li {
  margin-bottom: 6px;
}

.docs-page .m > h2:first-of-type {
  margin-top: 24px;
}

.docs-page .m pre,
.docs-page .m table,
.docs-page .m .tip {
  margin-top: 22px;
  margin-bottom: 30px;
}

.m strong {
  color: var(--text-primary);
  font-weight: 600;
}

.m a {
  color: var(--blue-deep);
  text-decoration: none;
  font-weight: 500;
}

.m a:hover {
  text-decoration: underline;
}

.m code,
kbd {
  font-family: var(--mono);
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 8px;
}

.m code {
  padding: 2px 7px;
  font-size: 15px;
  color: var(--blue-deep);
}

.m pre {
  margin: 18px 0;
  padding: 20px;
  overflow-x: auto;
  border-radius: 18px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 16px 34px rgba(var(--accent-rgb), 0.06);
}

.m pre code {
  padding: 0;
  border: none;
  box-shadow: none;
  background: none;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-primary);
}

.tip {
  margin: 20px 0;
  padding: 16px 18px;
  border: 1px solid rgba(var(--accent-rgb), 0.14);
  border-left: 2px solid rgba(var(--accent-rgb), 0.42);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 14px 30px rgba(var(--accent-rgb), 0.05);
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.8;
}

.tip b {
  color: var(--blue-deep);
}

.doc-shot {
  max-width: var(--reading-width-wide);
  margin: 28px 0 34px;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 18px 40px rgba(var(--accent-rgb), 0.08);
}

.doc-shot img {
  width: 100%;
  display: block;
  border: 1px solid rgba(var(--accent-rgb), 0.12);
  border-radius: 20px;
  box-shadow: 0 12px 30px rgba(var(--accent-rgb), 0.06);
}

.doc-shot figcaption {
  margin-top: 12px;
  padding: 0 6px 2px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-muted);
}

.doc-gallery {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  max-width: 1120px;
  margin: 0 auto 84px;
  padding: 0 36px;
}

.doc-gallery--single {
  grid-template-columns: minmax(0, 1fr);
}

.doc-gallery-head {
  grid-column: 1 / -1;
  margin: 10px 0 2px;
}

.doc-gallery-head h2 {
  margin: 0 0 10px;
  padding: 0;
  border: none;
  font-size: 32px;
  color: var(--text-primary);
}

.doc-gallery-head p {
  margin: 0;
  max-width: 760px;
  font-size: 17px;
  line-height: 1.85;
  color: var(--text-secondary);
}

.doc-gallery .doc-shot {
  max-width: none;
  margin: 0;
}

.doc-gallery--single .doc-shot {
  grid-column: 1 / -1;
}

table {
  width: 100%;
  margin: 18px 0;
  border-collapse: collapse;
  overflow: hidden;
  border-radius: 18px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 16px 34px rgba(var(--accent-rgb), 0.06);
  font-size: 14px;
}

th {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  background: rgba(var(--accent-light-rgb), 0.22);
  color: var(--text-primary);
  font-weight: 600;
}

td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-soft);
  color: var(--text-secondary);
}

tr:hover td {
  background: var(--bg-subtle);
}

kbd {
  display: inline-block;
  padding: 2px 8px;
  font-size: 13px;
  color: var(--text-primary);
}

hr {
  height: 1px;
  margin: 40px 0;
  border: none;
  background: var(--border);
}

.hero {
  padding: 124px 32px 42px;
  text-align: center;
}

.hero h1 {
  margin-bottom: 14px;
  font-size: 44px;
  font-weight: 800;
  letter-spacing: -0.7px;
  color: var(--text-primary);
}

.hero p {
  max-width: 620px;
  margin: 0 auto;
  font-size: 20px;
  line-height: 1.75;
  color: var(--text-secondary);
}

.docs-hub .hero {
  max-width: 760px;
  margin: 0 auto;
  padding-bottom: 28px;
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  margin-bottom: 16px;
  border-radius: 999px;
  border: 1px solid rgba(var(--accent-rgb), 0.14);
  background: rgba(var(--accent-light-rgb), 0.18);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.8px;
  text-transform: uppercase;
  color: var(--blue-deep);
}

.hero-meta {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid rgba(var(--accent-rgb), 0.12);
  background: rgba(var(--accent-light-rgb), 0.14);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 600;
}

.cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 36px 84px;
}

.card {
  display: block;
  padding: 32px;
  border-radius: 26px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  text-decoration: none;
}

.card:hover {
  transform: none;
  border-color: rgba(var(--accent-rgb), 0.18);
  background: var(--bg-card-hover);
}

/* card-icon styles moved to below media query with SVG sizing */

.card-title {
  margin-bottom: 8px;
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
}

.card-desc {
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-secondary);
}

.footer {
  margin-top: 48px;
  padding: 32px 24px 24px;
  border-top: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.94);
}

.footer a {
  text-decoration: none;
}

.footer-main {
  max-width: 1080px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 40px;
}

.footer-brand {
  max-width: 320px;
}

.footer-logo {
  display: inline-block;
  margin-bottom: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
}

.footer-logo:hover {
  color: var(--blue-deep);
}

.footer-tagline {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
}

.footer-columns {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(3, minmax(140px, 1fr));
  gap: 28px;
}

.footer-col-title {
  margin-bottom: 12px;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.02em;
}

.footer-col a {
  display: block;
  padding: 4px 0;
  font-size: 14px;
  color: var(--text-secondary);
  transition: color 0.2s;
}

.footer-col a:hover,
.footer-meta-links a:hover {
  color: var(--blue-deep);
}

.footer-bottom {
  max-width: 1080px;
  margin: 24px auto 0;
  padding-top: 16px;
  border-top: 1px solid var(--border-soft);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

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

.footer-meta-links {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-meta-links a {
  font-size: 13px;
  color: var(--text-muted);
  transition: color 0.2s;
}

.mobile-doc-nav { display:none !important; }
@media (max-width: 768px) { .mobile-doc-nav { display:flex !important; } }

@media (max-width: 768px) {
  .tn-burger,
  .topnav-burger {
    display: block;
  }

  .tn,
  .topnav {
    padding: 0 16px;
  }

  .tn .tn-n,
  .topnav-name {
    font-size: 16px;
  }

  .tn .tn-r,
  .topnav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 20px;
    border-bottom: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
  }

  .tn .tn-r.open,
  .topnav-links.open {
    display: flex;
  }

  .tn .tn-r a,
  .topnav-links a {
    padding: 12px 0;
    border: none;
    border-bottom: 1px solid var(--border-soft);
    border-radius: 0;
    font-size: 15px;
    color: rgba(var(--ink-rgb), 0.72);
  }

  .tn .tn-r a.is-active,
  .topnav-links a.is-active {
    box-shadow: none;
    background: transparent;
    padding: 12px 0;
    color: var(--blue-deep);
  }

  .tn .tn-r a.nav-cta,
  .topnav-links a.nav-cta {
    margin-top: 8px;
    padding: 12px 0;
    border: none;
    border-radius: 0;
    box-shadow: none;
    background: transparent;
    color: var(--blue-deep);
    text-align: left;
  }

  .lang-select-wrap {
    width: 100%;
    margin: 8px 0;
  }

  .lang-select {
    width: 100%;
    min-height: 42px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  }

  .lang-menu {
    width: 100%;
    margin: 8px 0;
    display: flex;
    flex-direction: column;
    align-items: stretch;
  }

  .lang-trigger {
    width: 100%;
    min-height: 42px;
    justify-content: center;
    box-shadow: none;
  }

  .lang-menu-list {
    position: static;
    display: none;
    width: 100%;
    margin-top: 8px;
    box-shadow: none;
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .lang-menu.open .lang-menu-list {
    display: block;
    transform: none;
  }

  .tn .tn-r .lang-menu-list a,
  .topnav-links .lang-menu-list a,
  .tn .tn-r .lang-menu-list a.is-active,
  .topnav-links .lang-menu-list a.is-active {
    justify-content: center;
    padding: 10px 12px;
    border-bottom: 0;
  }

  .tn .tn-r a:last-child,
  .topnav-links a:last-child {
    border-bottom: none;
  }

  .sb {
    display: none;
  }

  .m pre[data-lang]::before { display:none; }
  .m pre::after { display:none; }

  .mobile-doc-nav {
    display:flex;
    flex-wrap:wrap;
    gap:6px;
    padding:12px 16px;
    margin-bottom:16px;
    border-bottom:1px solid var(--border);
    overflow-x:auto;
    -webkit-overflow-scrolling:touch;
  }
  .mobile-doc-nav a {
    padding:6px 12px;
    border-radius:999px;
    font-size:13px;
    font-weight:500;
    color:var(--text-secondary);
    text-decoration:none;
    white-space:nowrap;
    border:1px solid var(--border);
    background:var(--bg-card);
  }
  .mobile-doc-nav a.on {
    background:rgba(var(--accent-rgb),0.1);
    color:var(--blue-deep);
    border-color:rgba(var(--accent-rgb),0.2);
  }

  .m {
    margin-left: 0;
    padding: 80px 22px 60px;
  }

  .page-lead {
    margin-bottom: 42px;
    padding: 22px 20px;
    border-radius: 22px;
  }

  .page-kicker {
    font-size: 11px;
    letter-spacing: 1.6px;
  }

  .m h1 {
    font-size: 28px;
  }

  .m h2 {
    font-size: 25px;
  }

  .m h3 {
    font-size: 18px;
  }

  .m p,
  .m li {
    font-size: 16px;
  }

  .m pre {
    padding: 14px;
    margin: 14px 0;
  }

  .m pre code {
    font-size: 13px;
  }

  table {
    display: block;
    overflow-x: auto;
    font-size: 13px;
  }

  th {
    padding: 8px 10px;
    white-space: nowrap;
  }
  td {
    padding: 8px 10px;
    white-space: normal;
    min-width: 100px;
  }

  .hero {
    padding: 100px 20px 36px;
  }

  .hero h1 {
    font-size: 28px;
  }

  .hero p {
    font-size: 16px;
  }

  .hero-meta {
    gap: 8px;
    margin-top: 16px;
  }

  .hero-pill {
    font-size: 13px;
  }

  .cards {
    grid-template-columns: 1fr;
    padding: 0 16px 60px;
  }

  .doc-gallery {
    grid-template-columns: 1fr;
    gap: 14px;
    padding: 0 16px 60px;
  }

  .doc-gallery-head h2 {
    font-size: 26px;
  }

  .doc-gallery-head p,
  .doc-shot figcaption {
    font-size: 15px;
  }

  .doc-shot {
    margin: 22px 0 28px;
    padding: 10px;
    border-radius: 22px;
  }

  .doc-shot img {
    border-radius: 14px;
  }

  .footer {
    padding: 28px 20px 22px;
  }

  .footer-main {
    flex-direction: column;
    gap: 28px;
  }

  .footer-brand {
    max-width: none;
  }

  .footer-columns {
    width: 100%;
    grid-template-columns: repeat(2, minmax(140px, 1fr));
    gap: 24px;
  }

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

@media (max-width: 640px) {
  .footer-columns {
    grid-template-columns: 1fr;
    gap: 20px;
  }
}

/* ===== Theme Toggle ===== */
.theme-toggle { background:none; border:1px solid var(--border); border-radius:8px; padding:8px 10px; min-width:40px; min-height:40px; justify-content:center; cursor:pointer; color:var(--text-secondary); display:flex; align-items:center; transition:all .2s; }
.theme-toggle:hover { border-color:var(--border-strong); color:var(--blue-deep); }
[data-theme="dark"] .ti-sun { display:inline; }
[data-theme="dark"] .ti-moon { display:none; }
.ti-sun { display:none; }
.ti-moon { display:inline; }

/* ===== Code block enhancements ===== */
.m pre { position:relative; }
.m pre[data-lang]::before {
  content: attr(data-lang);
  position: absolute;
  top: 8px;
  right: 12px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  opacity: 0.6;
}

.m pre::after {
  content: "Copy";
  position: absolute;
  top: 8px;
  right: 60px;
  font-size: 11px;
  font-weight: 500;
  color: var(--blue-deep);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2px 8px;
  cursor: pointer;
  opacity: 0;
  transition: opacity .2s;
}
.m pre:hover::after { opacity: 1; }

.m pre code { counter-reset: line; }

/* ===== Card icon (SVG style matching main site feat-icon) ===== */
.card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-bottom: 16px;
  border-radius: 14px;
  background: rgba(var(--accent-light-rgb), 0.22);
  border: 1px solid rgba(var(--accent-rgb), 0.14);
  font-size: 24px;
}

/* ===== Dark Mode ===== */
[data-theme="dark"] {
  --bg: #0f1724;
  --bg-subtle: #151e2d;
  --bg-card: rgba(255,255,255,0.05);
  --bg-card-hover: rgba(255,255,255,0.08);
  --text-primary: #e2e8f0;
  --text-secondary: #8b95a2;
  --text-muted: #5a6470;
  --border: rgba(255,255,255,0.08);
  --border-strong: rgba(255,255,255,0.14);
  --border-soft: rgba(255,255,255,0.04);
  --blue: #5fb3ea;
  --blue-deep: #7cc4f0;
  --blue-light: #9dd4f5;
  --blue-pale: rgba(95,179,234,0.12);
  --accent-rgb: 95, 179, 234;
  --accent-light-rgb: 30, 45, 65;
  --ink-rgb: 226, 232, 240;
  color-scheme: dark;
}

[data-theme="dark"] body {
  background:
    radial-gradient(circle at top, rgba(30,45,65,0.5) 0%, rgba(15,23,36,0) 34%),
    linear-gradient(180deg, #0f1724 0%, #111b2a 22%, #151e2d 100%);
}

[data-theme="dark"] .tn.scrolled,
[data-theme="dark"] .topnav.scrolled {
  background: rgba(15,23,36,0.82);
  border-bottom-color: rgba(255,255,255,0.06);
  box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

[data-theme="dark"] .m pre {
  background: rgba(15, 23, 36, 0.8);
  border-color: rgba(255,255,255,0.06);
}

[data-theme="dark"] .m code {
  background: rgba(255,255,255,0.06);
  color: var(--blue-light);
}

[data-theme="dark"] .m pre code {
  background: none;
  color: var(--text-primary);
}

[data-theme="dark"] .tip {
  background: rgba(255,255,255,0.04);
  border-color: rgba(95,179,234,0.12);
  border-left-color: rgba(95,179,234,0.36);
}

[data-theme="dark"] .warn {
  background: rgba(255,180,50,0.06);
  border-color: rgba(255,180,50,0.14);
  border-left-color: rgba(255,180,50,0.4);
}

[data-theme="dark"] .sb {
  background: rgba(15,23,36,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-right-color: rgba(255,255,255,0.06);
}

[data-theme="dark"] .card {
  background: var(--bg-card);
  border-color: var(--border);
}

[data-theme="dark"] .card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-strong);
}

[data-theme="dark"] table {
  background: rgba(255,255,255,0.03);
  border-color: var(--border);
}

[data-theme="dark"] th {
  background: rgba(255,255,255,0.05);
  border-bottom-color: var(--border);
}

[data-theme="dark"] td {
  border-bottom-color: var(--border-soft);
}

[data-theme="dark"] tr:hover td {
  background: rgba(255,255,255,0.03);
}

[data-theme="dark"] .hero {
  background: transparent;
}

[data-theme="dark"] .footer {
  background: rgba(15,23,36,0.92);
  border-top-color: rgba(255,255,255,0.06);
}

[data-theme="dark"] .footer-logo,
[data-theme="dark"] .footer-col-title {
  color: var(--text-primary);
}

[data-theme="dark"] .footer-tagline,
[data-theme="dark"] .footer-col a,
[data-theme="dark"] .footer-meta-links a {
  color: var(--text-secondary);
}

[data-theme="dark"] .page-lead {
  background: rgba(255,255,255,0.04);
  border-color: rgba(255,255,255,0.08);
  box-shadow: 0 18px 40px rgba(0,0,0,0.15);
}

[data-theme="dark"] .m code,
[data-theme="dark"] kbd {
  border-color: rgba(255,255,255,0.08);
}

[data-theme="dark"] .tn .tn-r a.is-active,
[data-theme="dark"] .topnav-links a.is-active {
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.1);
}

[data-theme="dark"] .tn .tn-r a.nav-cta,
[data-theme="dark"] .topnav-links a.nav-cta {
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.1);
}

[data-theme="dark"] .lang-select {
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.1);
  color: var(--blue-deep);
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}

[data-theme="dark"] .lang-select:hover,
[data-theme="dark"] .lang-select:focus-visible {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.16);
}

[data-theme="dark"] .lang-select option {
  background: #1c1c1e;
  color: var(--text-primary);
}

[data-theme="dark"] .lang-select-wrap::after {
  color: var(--blue-deep);
}

[data-theme="dark"] .lang-trigger {
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.1);
  color: rgba(232,236,240,0.72);
  box-shadow: 0 8px 24px rgba(0,0,0,0.18);
}

[data-theme="dark"] .lang-trigger:hover,
[data-theme="dark"] .lang-menu.open .lang-trigger {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.16);
  color: var(--blue-light);
}

[data-theme="dark"] .lang-menu-list {
  background: rgba(28,28,30,0.9);
  border-color: rgba(255,255,255,0.1);
  box-shadow: 0 20px 40px rgba(0,0,0,0.28), 0 8px 16px rgba(0,0,0,0.18);
}

[data-theme="dark"] .tn .tn-r .lang-menu-list a,
[data-theme="dark"] .topnav-links .lang-menu-list a {
  color: rgba(232,236,240,0.72);
}

[data-theme="dark"] .tn .tn-r .lang-menu-list a:hover,
[data-theme="dark"] .topnav-links .lang-menu-list a:hover,
[data-theme="dark"] .tn .tn-r .lang-menu-list a.is-active,
[data-theme="dark"] .topnav-links .lang-menu-list a.is-active {
  background: rgba(95,179,234,0.1);
  color: var(--blue-light);
}

[data-theme="dark"] .tn .tn-r .lang-menu-list a.is-active::after,
[data-theme="dark"] .topnav-links .lang-menu-list a.is-active::after {
  color: var(--blue-light);
}

[data-theme="dark"] .mobile-doc-nav a {
  background:rgba(255,255,255,0.04);
  border-color:rgba(255,255,255,0.08);
}
[data-theme="dark"] .mobile-doc-nav a.on {
  background:rgba(95,179,234,0.1);
  color:var(--blue-light);
}

[data-theme="dark"] .sb a:hover {
  background: rgba(255,255,255,0.05);
  border-color: rgba(255,255,255,0.08);
}

[data-theme="dark"] .sb a.on {
  background: rgba(95,179,234,0.1);
  border-color: rgba(95,179,234,0.2);
}

@media (max-width: 768px) {
  [data-theme="dark"] .tn .tn-r,
  [data-theme="dark"] .topnav-links {
    background: rgba(15,23,36,0.96);
    border-bottom-color: rgba(255,255,255,0.06);
  }
}