:root {
  --blue: #1c7cf2;
  --blue-dark: #0b57b8;
  --blue-soft: #e8f2fd;
  --ink: #142033;
  --muted: #5c6d82;
  --line: #e3ebf4;
  --paper: #ffffff;
  --wash: #f4f8fc;
  --green: #1aa35a;
  --focus: #1c7cf2;
  --shadow: 0 18px 50px rgba(20, 32, 51, 0.08);
  --header: 4.25rem;
  --wrap: 1120px;
  --legal: 820px;
  color-scheme: light;
}

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

html {
  scroll-behavior: smooth;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", "Noto Sans Arabic", "Noto Sans SC", sans-serif;
  color: var(--ink);
  background: var(--paper);
  font-size: 1.0625rem;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}

:lang(ar) {
  font-family: "Noto Naskh Arabic", "Noto Sans Arabic", "Droid Arabic Kufi", Tahoma, sans-serif;
  line-height: 1.75;
}

:lang(zh-CN) {
  font-family: "PingFang SC", "Noto Sans SC", "Noto Sans CJK SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  line-height: 1.75;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--blue-dark);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

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

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

.skip-link {
  position: absolute;
  inset-inline-start: 1rem;
  top: -4rem;
  z-index: 40;
  background: var(--ink);
  color: #fff;
  padding: 0.6rem 0.9rem;
  border-radius: 0.5rem;
}

.skip-link:focus {
  top: 0.75rem;
  color: #fff;
}

.wrap {
  width: min(var(--wrap), calc(100% - 2rem));
  margin-inline: auto;
}

.wrap-legal {
  width: min(var(--legal), calc(100% - 2rem));
  margin-inline: auto;
  text-align: start;
}

h1,
h2,
h3,
p {
  margin-block: 0;
}

h1,
h2,
.platform-name {
  letter-spacing: -0.03em;
  line-height: 1.12;
  font-weight: 650;
}

h1 {
  font-size: clamp(2.35rem, 5.4vw, 4.35rem);
}

h2 {
  font-size: clamp(1.8rem, 3vw, 2.55rem);
}

h3 {
  font-size: 1.15rem;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

.lede {
  color: var(--muted);
  font-size: 1.125rem;
  max-width: 42rem;
}

.eyebrow,
.kicker {
  color: var(--blue-dark);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: #fff;
  border-bottom: 1px solid var(--line);
}

.header-inner {
  width: min(var(--wrap), calc(100% - 2rem));
  margin-inline: auto;
  min-height: var(--header);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--ink);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: -0.03em;
  font-size: 1.15rem;
}

.brand img {
  width: 2.5rem;
  height: 2.5rem;
}

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  border-radius: 999px;
  padding: 0.45rem 0.85rem;
  font: inherit;
  font-size: 0.95rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.15rem;
}

.site-nav a {
  color: var(--ink);
  text-decoration: none;
  font-weight: 560;
}

.site-nav a[aria-current="page"] {
  color: var(--blue-dark);
}

.site-nav a:hover {
  color: var(--blue-dark);
}

.lang {
  position: relative;
}

.lang summary {
  list-style: none;
  cursor: pointer;
  font-weight: 650;
  color: var(--ink);
}

.lang summary::-webkit-details-marker {
  display: none;
}

.lang summary::after {
  content: "";
  display: inline-block;
  margin-inline-start: 0.35rem;
  border-inline-start: 4px solid transparent;
  border-inline-end: 4px solid transparent;
  border-top: 5px solid currentColor;
  vertical-align: 0.15em;
}

.lang-menu {
  position: absolute;
  inset-inline-end: 0;
  top: calc(100% + 0.55rem);
  min-width: 11rem;
  margin: 0;
  padding: 0.4rem;
  list-style: none;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 0.9rem;
  box-shadow: var(--shadow);
}

.lang-menu a {
  display: block;
  padding: 0.45rem 0.7rem;
  border-radius: 0.55rem;
  text-decoration: none;
  color: var(--ink);
}

.lang-menu a[aria-current="true"] {
  background: var(--blue-soft);
  color: var(--blue-dark);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border-radius: 999px;
  padding: 0.85rem 1.25rem;
  font: inherit;
  font-weight: 680;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
}

.btn-primary {
  background: var(--blue);
  color: #fff;
}

.btn-primary:hover {
  background: var(--blue-dark);
  color: #fff;
}

.btn-secondary {
  background: #fff;
  color: var(--ink);
  border-color: #c9d7e8;
}

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

.btn-small {
  padding: 0.55rem 0.95rem;
  font-size: 0.95rem;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 2.5rem;
  align-items: center;
  padding-block: 3.5rem 4rem;
}

.hero-copy {
  display: grid;
  gap: 1.15rem;
  justify-items: start;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.fine {
  color: var(--muted);
  font-size: 0.95rem;
  max-width: 36rem;
}

.hero-stage {
  position: relative;
  min-height: 28rem;
  display: grid;
  place-items: center;
}

.hero-glow {
  position: absolute;
  width: min(26rem, 80%);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(28, 124, 242, 0.18), rgba(28, 124, 242, 0) 68%);
}

.hero-logo {
  position: relative;
  width: min(22rem, 78%);
  z-index: 2;
  filter: drop-shadow(0 18px 30px rgba(20, 80, 160, 0.16));
}

.device {
  position: absolute;
  background: #fff;
  border: 1px solid #d7e3f0;
  box-shadow: var(--shadow);
  z-index: 1;
}

.device-phone {
  width: 7.5rem;
  height: 13.5rem;
  border-radius: 1.3rem;
  inset-inline-start: 0.2rem;
  bottom: 1.5rem;
  padding: 0.7rem 0.55rem;
}

.device-desk {
  width: 9.5rem;
  height: 6.4rem;
  border-radius: 0.7rem;
  inset-inline-end: 0;
  top: 2rem;
  padding: 0.55rem;
}

.device-desk::after {
  content: "";
  position: absolute;
  inset-inline: 1.2rem;
  bottom: -0.45rem;
  height: 0.45rem;
  background: #d5e2f0;
  border-radius: 0 0 0.3rem 0.3rem;
}

.bubble {
  display: block;
  height: 0.7rem;
  border-radius: 999px;
  margin-bottom: 0.45rem;
}

.bubble-in {
  width: 72%;
  background: #d7e9ff;
}

.bubble-out {
  width: 58%;
  margin-inline-start: auto;
  background: #d9f5e5;
}

.band {
  padding-block: 4.25rem;
}

.band-wash {
  background: var(--wash);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 2.5rem;
  align-items: start;
}

.points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.15rem;
}

.points li {
  padding-block-end: 1.15rem;
  border-bottom: 1px solid var(--line);
}

.points li:last-child {
  border-bottom: 0;
  padding-block-end: 0;
}

.points p,
.stack p,
.feature-item p,
.support-block p,
.contact-card p {
  color: var(--muted);
  margin-top: 0.35rem;
}

.stack {
  display: grid;
  gap: 0.9rem;
}

.platform-grid,
.download-grid {
  display: grid;
  gap: 0.9rem;
  margin-top: 1.8rem;
  min-width: 0;
}

.platform-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

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

.platform,
.download-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 1.25rem;
  min-height: 11.5rem;
  min-width: 0;
  padding: 1.15rem 1.1rem 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.band-wash .platform,
.band-wash .download-card {
  background: #fff;
}

.platform svg,
.download-card svg {
  width: 2.4rem;
  height: 2.4rem;
  color: var(--blue);
}

.platform-name,
.download-card h3 {
  font-size: clamp(1.25rem, 2vw, 1.55rem);
  margin-top: auto;
}

.status {
  align-self: flex-start;
  border-radius: 999px;
  padding: 0.18rem 0.6rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.status-beta {
  background: var(--blue-soft);
  color: var(--blue-dark);
}

.status-soon {
  background: #eef2f6;
  color: #526277;
}

.page-intro {
  padding-block: 3.2rem 1rem;
  display: grid;
  gap: 0.8rem;
}

.feature-group {
  padding-block: 1.4rem 0.4rem;
}

.feature-group + .feature-group {
  border-top: 1px solid var(--line);
  margin-top: 1.2rem;
}

.feature-list {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem 1.5rem;
}

.security-section,
.support-block {
  padding-block: 1.3rem;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 0.75rem;
}

.security-section p,
.support-block p,
.legal-copy p,
.legal-copy li {
  color: var(--ink);
}

.legal-banner {
  background: var(--wash);
  border: 1px solid var(--line);
  border-radius: 1rem;
  padding: 1rem 1.1rem;
  margin-block: 1.5rem 0.5rem;
}

.legal-copy {
  padding-block: 1.5rem 4rem;
}

.legal-copy h1 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  margin-bottom: 0.75rem;
}

.legal-copy h2 {
  font-size: 1.35rem;
  margin-top: 2rem;
}

.legal-copy p,
.legal-copy ul {
  margin-top: 0.75rem;
}

.legal-copy ul {
  padding-inline-start: 1.2rem;
}

.legal-copy li + li {
  margin-top: 0.4rem;
}

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

.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-block: 1.5rem 3rem;
}

.contact-card {
  border: 1px solid var(--line);
  border-radius: 1.1rem;
  padding: 1.1rem 1.15rem;
  background: #fff;
}

.address {
  font-style: normal;
  line-height: 1.55;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--wash);
  padding-block: 2.5rem 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1.5rem 1rem;
}

.site-footer h2 {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.7rem;
}

.site-footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.4rem;
}

.site-footer a {
  color: var(--ink);
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--blue-dark);
  text-decoration: underline;
}

.footer-base {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.95rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-lang {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.footer-lang-label {
  margin: 0;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 700;
}

.footer-lang .lang-menu {
  top: auto;
  bottom: calc(100% + 0.45rem);
}

.cookie-notice {
  position: sticky;
  bottom: 0;
  z-index: 25;
  background: #fff;
  border-top: 1px solid var(--line);
  box-shadow: 0 -8px 30px rgba(20, 32, 51, 0.05);
}

.cookie-inner {
  width: min(var(--wrap), calc(100% - 2rem));
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 0.9rem;
}

.cookie-inner p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

html.cookie-dismissed .cookie-notice {
  display: none;
}

.error-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 2rem;
  text-align: center;
}

@media (max-width: 1024px) {
  .platform-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (max-width: 860px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    display: none;
    position: absolute;
    inset-inline: 0;
    top: 100%;
    background: #fff;
    border-bottom: 1px solid var(--line);
    padding: 0.4rem 1.25rem 1.1rem;
    flex-direction: column;
    align-items: stretch;
    gap: 0.15rem;
  }

  body.nav-open .site-nav {
    display: flex;
  }

  .site-nav a,
  .lang summary {
    padding-block: 0.7rem;
  }

  .lang-menu {
    position: static;
    box-shadow: none;
    margin-top: 0.2rem;
  }

  .hero,
  .split,
  .feature-list,
  .contact-grid,
  .download-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-block: 2rem 2.5rem;
  }

  .hero-stage {
    min-height: 22rem;
    order: -1;
  }

  .device-phone {
    inset-inline-start: 0.5rem;
  }

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

@media (max-width: 430px) {
  .platform-grid,
  .download-grid {
    grid-template-columns: 1fr;
  }

  .platform,
  .download-card {
    min-height: 9.5rem;
  }

  .cookie-inner {
    flex-direction: column;
    align-items: stretch;
  }

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

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

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}