:root {
  --blue: #188DCE;
  --navy: #0B1220;
  --text: #111827;
  --muted: #667085;
  --light: #F5F7FA;
  --border: #E5E7EB;
  --white: #ffffff;
  --shadow: 0 22px 70px rgba(15, 23, 42, 0.11);
  --radius: 8px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", Arial, sans-serif;
  color: var(--text);
  background: #fff;
  line-height: 1.6;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, textarea { font: inherit; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(229, 231, 235, 0.78);
}
.header-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 15px 24px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
}
.brand {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 1px;
  width: 178px;
}
.brand-mark { width: 166px; height: auto; }
.brand-slogan {
  color: var(--blue);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2px;
  margin-left: 2px;
  line-height: 1;
}
.site-nav {
  justify-self: center;
  display: flex;
  align-items: center;
  gap: 22px;
}
.nav-link {
  color: #344054;
  font-size: 14px;
  font-weight: 650;
  padding: 8px 0;
}
.nav-link:hover,
.nav-link.active { color: var(--blue); }
.lang-switch {
  display: flex;
  align-items: center;
  gap: 7px;
  color: #98A2B3;
  font-size: 13px;
  font-weight: 800;
  white-space: nowrap;
}
.lang-switch a { color: #667085; }
.lang-switch a.selected { color: var(--blue); }
.menu-toggle {
  display: none;
  border: 0;
  background: transparent;
  width: 40px;
  height: 40px;
  padding: 9px;
}
.menu-toggle span {
  display: block;
  height: 2px;
  margin: 5px 0;
  background: var(--navy);
}
.language-recommend {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  padding: 10px 18px;
  background: #EAF7FD;
  color: #164E73;
  font-size: 14px;
}
.language-recommend.show { display: flex; }
.language-recommend a { font-weight: 800; color: var(--blue); }
.language-recommend span,
.language-recommend a,
.language-recommend button { white-space: nowrap; }
.language-recommend button {
  border: 0;
  background: transparent;
  color: #667085;
  cursor: pointer;
}
main { overflow: hidden; }
.hero {
  max-width: 1180px;
  margin: 0 auto;
  min-height: 720px;
  padding: 82px 24px 72px;
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(480px, 1.1fr);
  gap: 48px;
  align-items: center;
}
.hero-copy h1 {
  margin: 0;
  max-width: 610px;
  color: var(--navy);
  font-size: clamp(48px, 6vw, 78px);
  line-height: 0.95;
  letter-spacing: 0;
  font-weight: 840;
}
.hero-copy p {
  margin: 26px 0 0;
  max-width: 540px;
  color: var(--muted);
  font-size: 19px;
  line-height: 1.7;
}
.hero-actions {
  margin-top: 34px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: var(--radius);
  font-weight: 800;
  font-size: 15px;
  border: 1px solid transparent;
}
.btn.primary {
  color: #fff;
  background: var(--blue);
  box-shadow: 0 14px 30px rgba(24, 141, 206, 0.24);
}
.btn.secondary {
  color: var(--navy);
  background: #fff;
  border-color: var(--border);
}
.resource-strip {
  margin-top: 38px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.resource-strip a {
  border: 1px solid var(--border);
  background: #fff;
  border-radius: var(--radius);
  padding: 10px 13px;
  color: #475467;
  font-size: 13px;
  font-weight: 760;
}
.hero-visual {
  position: relative;
  min-height: 540px;
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(24, 141, 206, 0.09), rgba(245, 247, 250, 0.25) 44%, rgba(24, 141, 206, 0.04)),
    #F8FBFD;
  border: 1px solid #E9EEF3;
  box-shadow: var(--shadow);
  overflow: hidden;
}
.hero-product {
  position: absolute;
  left: 34px;
  right: 120px;
  top: 70px;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 18px 60px rgba(15, 23, 42, 0.22);
}
.hero-phone {
  position: absolute;
  right: 28px;
  bottom: -48px;
  width: 210px;
}
.phone-frame {
  margin: 0;
  width: 100%;
}
.phone-shell {
  width: 100%;
  aspect-ratio: 1125 / 2436;
  border-radius: 28px;
  padding: 8px;
  background: #0B1220;
  box-shadow: 0 22px 58px rgba(15, 23, 42, 0.2);
  overflow: hidden;
}
.phone-shell img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 21px;
}
.phone-frame figcaption {
  margin-top: 12px;
  color: #667085;
  text-align: center;
  font-size: 13px;
  font-weight: 700;
}
.section {
  max-width: 1180px;
  margin: 0 auto;
  padding: 84px 24px;
}
.section-heading {
  max-width: 720px;
  margin-bottom: 34px;
}
.section-heading h2,
.split-copy h2,
.support-cta h2,
.page-hero h1,
.page-hero h2,
.two-column h2,
.company-info h2 {
  margin: 0;
  color: var(--navy);
  line-height: 1.08;
  letter-spacing: 0;
  font-weight: 830;
}
.section-heading h2 { font-size: clamp(34px, 4vw, 52px); }
.section-heading p,
.split-copy p,
.page-hero p,
.support-cta p,
.narrative p {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.75;
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.feature-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  padding: 24px;
  min-height: 190px;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.04);
}
.feature-card h3 {
  margin: 18px 0 8px;
  color: var(--navy);
  font-size: 20px;
  line-height: 1.25;
}
.feature-card p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}
.icon {
  display: inline-block;
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: var(--blue);
  position: relative;
}
.icon::before,
.icon::after {
  content: "";
  position: absolute;
  inset: 10px;
  border: 2px solid #fff;
  border-radius: 50%;
}
.icon-cloud::before { border-radius: 14px; }
.icon-share::after { inset: 17px 8px 8px 17px; border-radius: 0; border-left: 0; border-bottom: 0; transform: rotate(45deg); }
.icon-bell::before { border-radius: 14px 14px 8px 8px; }
.split-section {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(420px, 1.15fr);
  gap: 50px;
  align-items: center;
}
.app-band {
  max-width: none;
  padding: 92px max(24px, calc((100vw - 1180px) / 2 + 24px));
  background: linear-gradient(180deg, #F5F7FA 0%, #fff 100%);
}
.split-copy h2 { font-size: clamp(34px, 4vw, 52px); }
.feature-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 28px;
}
.feature-list span {
  color: var(--navy);
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
  font-weight: 760;
}
.store-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}
.store-row span {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 16px;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 8px;
  color: #475467;
  font-size: 14px;
  font-weight: 800;
}
.phone-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 220px));
  justify-content: center;
  gap: 24px;
  align-items: start;
}
.phone-pair .phone-frame:nth-child(2) { margin-top: 56px; }
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}
.product-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  overflow: hidden;
  box-shadow: 0 12px 36px rgba(15, 23, 42, 0.05);
}
.product-image-wrap {
  background: #111;
  aspect-ratio: 1653 / 952;
  overflow: hidden;
}
.product-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.product-copy {
  padding: 22px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.product-code {
  color: var(--blue);
  font-weight: 850;
  font-size: 13px;
}
.product-card h3 {
  margin: 6px 0 8px;
  color: var(--navy);
  font-size: 21px;
  line-height: 1.22;
}
.product-card p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}
.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}
.tag-row span {
  padding: 6px 9px;
  border-radius: 8px;
  color: #0F5F8C;
  background: #EAF7FD;
  font-size: 12px;
  font-weight: 800;
}
.support-cta {
  max-width: 1132px;
  margin: 20px auto 90px;
  padding: 42px;
  border-radius: 8px;
  background: var(--navy);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.support-cta h2 { color: #fff; font-size: 38px; }
.support-cta p { color: rgba(255,255,255,0.72); max-width: 680px; }
.support-cta a:not(.btn) { color: #8BD5FF; font-weight: 800; }
.page-hero {
  max-width: 1180px;
  margin: 0 auto;
  padding: 86px 24px 54px;
}
.page-hero.compact {
  text-align: center;
  max-width: 850px;
}
.page-hero h1 { font-size: clamp(42px, 5vw, 68px); }
.page-hero h2 {
  font-size: clamp(30px, 4vw, 48px);
  margin-top: 8px;
}
.page-hero p {
  max-width: 720px;
  margin: 20px auto 0;
}
.app-hero {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(420px, 1.1fr);
  gap: 48px;
  align-items: center;
}
.app-hero p { margin-left: 0; }
.hero-pair .phone-frame { width: 220px; }
.product-grid.full {
  grid-template-columns: 1fr;
  max-width: 920px;
  margin: 0 auto;
}
.product-grid.full .product-card {
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(0, 1fr);
}
.product-grid.full .product-copy {
  justify-content: center;
  padding: 34px;
}
.note-section {
  max-width: 880px;
  margin: 0 auto 80px;
  padding: 0 24px;
  color: var(--muted);
  text-align: center;
}
.app-features .feature-card { min-height: 150px; }
.app-features .feature-card h3 { margin-top: 0; }
.app-gallery-section {
  max-width: none;
  padding-left: max(24px, calc((100vw - 1180px) / 2 + 24px));
  padding-right: 0;
}
.screenshot-rail {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 220px;
  gap: 24px;
  overflow-x: auto;
  padding: 4px 24px 30px 0;
  scroll-snap-type: x proximity;
}
.screenshot-rail .phone-frame { scroll-snap-align: start; }
.two-column {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 42px;
  align-items: start;
}
.faq-list {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}
details {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  padding: 18px 20px;
}
summary {
  cursor: pointer;
  color: var(--navy);
  font-weight: 800;
}
details p {
  margin: 12px 0 0;
  color: var(--muted);
}
.contact-panel {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  padding: 26px;
  box-shadow: 0 12px 34px rgba(15, 23, 42, 0.05);
}
.contact-panel a { color: var(--blue); font-weight: 800; }
.inline-links {
  display: grid;
  gap: 8px;
  margin-top: 22px;
}
.download-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}
.download-list article {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
  background: #fff;
}
.download-list span {
  color: var(--blue);
  font-weight: 850;
  font-size: 13px;
}
.download-list h3 {
  margin: 10px 0 8px;
  color: var(--navy);
}
.download-list p {
  color: var(--muted);
  font-weight: 760;
}
.narrative {
  max-width: 900px;
}
.mission-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 34px;
}
.mission-grid article,
.company-info {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 28px;
  background: #fff;
}
.value-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}
.value-row span {
  background: #EAF7FD;
  color: #0F5F8C;
  border-radius: 8px;
  padding: 9px 12px;
  font-weight: 850;
}
.company-info {
  max-width: 850px;
  margin-top: 0;
}
.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(320px, 0.8fr);
  gap: 24px;
  align-items: start;
}
.contact-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
.contact-cards article {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 22px;
  background: #fff;
}
.contact-cards h3 {
  margin: 0 0 8px;
  color: var(--navy);
}
.contact-cards a {
  color: var(--blue);
  font-weight: 800;
  overflow-wrap: anywhere;
}
.contact-form {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
  background: var(--light);
}
.contact-form label {
  display: grid;
  gap: 8px;
  color: var(--navy);
  font-weight: 780;
}
.contact-form label:nth-child(4) { grid-column: 1 / -1; }
.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  padding: 12px 13px;
  color: var(--text);
}
.contact-form button { justify-self: start; }
.legal-layout {
  max-width: 1180px;
  margin: 0 auto;
  padding: 24px 24px 90px;
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 36px;
  align-items: start;
}
.legal-aside {
  position: sticky;
  top: 98px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  padding: 22px;
}
.legal-aside h2 {
  margin: 0 0 12px;
  color: var(--navy);
}
.legal-aside p {
  color: var(--muted);
  overflow-wrap: anywhere;
}
.legal-content {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  padding: clamp(24px, 4vw, 48px);
}
.legal-content h2 {
  margin: 34px 0 12px;
  color: var(--navy);
  font-size: 24px;
  line-height: 1.25;
}
.legal-content h2:first-child { margin-top: 0; }
.legal-content h3 {
  margin: 24px 0 10px;
  color: var(--navy);
  font-size: 18px;
}
.legal-content p {
  margin: 0 0 12px;
  color: #344054;
  font-size: 15px;
  line-height: 1.72;
}
.site-footer {
  background: #08111F;
  color: #D0D5DD;
  padding: 54px 24px 30px;
}
.footer-grid {
  max-width: 1180px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(260px, 1.3fr) repeat(3, minmax(160px, 0.7fr));
  gap: 34px;
}
.site-footer .brand-mark text { fill: #fff; }
.site-footer .brand-slogan { color: #8BD5FF; }
.site-footer p {
  max-width: 300px;
  color: #98A2B3;
}
.site-footer h3 {
  margin: 0 0 14px;
  color: #fff;
  font-size: 15px;
}
.site-footer a {
  display: block;
  margin: 8px 0;
  color: #D0D5DD;
  font-size: 14px;
}
.site-footer a:hover { color: #8BD5FF; }
.footer-bottom {
  max-width: 1180px;
  margin: 38px auto 0;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.12);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  color: #98A2B3;
  font-size: 13px;
}

@media (max-width: 980px) {
  .header-inner {
    grid-template-columns: auto auto auto;
  }
  .menu-toggle { display: block; justify-self: end; }
  .site-nav {
    display: none;
    grid-column: 1 / -1;
    justify-self: stretch;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding: 12px 0;
  }
  body.menu-open .site-nav { display: flex; }
  .lang-switch { justify-self: end; }
  .hero,
  .app-hero,
  .split-section,
  .two-column,
  .contact-layout,
  .legal-layout {
    grid-template-columns: 1fr;
  }
  .hero {
    min-height: auto;
    padding-top: 58px;
  }
  .hero-visual { min-height: 520px; }
  .hero-product { right: 42px; }
  .hero-phone { width: 190px; }
  .feature-grid,
  .product-grid,
  .download-list,
  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .product-grid.full .product-card {
    grid-template-columns: 1fr;
  }
  .legal-aside { position: static; }
}

@media (max-width: 640px) {
  .header-inner {
    padding: 12px 16px;
    gap: 10px;
  }
  .brand { width: 142px; }
  .brand-mark { width: 138px; }
  .brand-slogan { font-size: 10px; }
  .lang-switch { font-size: 12px; }
  .hero,
  .section,
  .page-hero {
    padding-left: 18px;
    padding-right: 18px;
  }
  .hero-copy h1 { font-size: 45px; }
  .hero-copy p { font-size: 17px; }
  .hero-actions .btn { width: 100%; }
  .resource-strip a { flex: 1 1 45%; text-align: center; }
  .hero-visual {
    min-height: 430px;
  }
  .hero-product {
    left: 18px;
    right: 18px;
    top: 34px;
  }
  .hero-phone {
    right: 18px;
    bottom: -42px;
    width: 150px;
  }
  .feature-grid,
  .product-grid,
  .download-list,
  .mission-grid,
  .contact-cards,
  .contact-form,
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .phone-pair {
    grid-template-columns: repeat(2, minmax(0, 150px));
    gap: 14px;
  }
  .hero-pair .phone-frame { width: 150px; }
  .phone-pair .phone-frame:nth-child(2) { margin-top: 34px; }
  .support-cta {
    margin-left: 18px;
    margin-right: 18px;
    padding: 28px;
    display: grid;
  }
  .footer-bottom {
    flex-direction: column;
  }
  .legal-content {
    padding: 22px;
  }
}