:root {
  --app-background: #08110D;
  --app-background-2: #0D1A13;
  --app-surface: #101C16;
  --app-elevated: #17261F;
  --app-border: rgba(255, 255, 255, 0.08);
  --app-primary: #3CB371;
  --app-primary-deep: #0E5B3B;
  --app-mint: #BEE8CF;
  --app-ivory: #F3F1E8;
  --app-muted: #98A89F;
  --app-gold: #C8A45D;
  --app-warning: #E2B665;
  --app-sky: #8BC7E6;
  --app-rose: #E7837C;
  --app-black: #050907;
  --font-stack: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --space-1: 0.5rem;
  --space-2: 0.75rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;
  --space-7: 4rem;
  --radius: 8px;
  --shadow-card: 0 18px 44px rgba(0, 0, 0, 0.28);
  --shadow-glow: 0 0 42px rgba(60, 179, 113, 0.16);
  --transition: 180ms ease;
}

@media (prefers-reduced-motion: reduce) {
  :root {
    --transition: 0ms;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0ms !important;
    animation-duration: 0ms !important;
  }
}

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

html {
  scroll-behavior: smooth;
  background: var(--app-background);
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  font-family: var(--font-stack);
  color: var(--app-ivory);
  background:
    radial-gradient(circle at 50% -10%, rgba(60, 179, 113, 0.22), transparent 34rem),
    linear-gradient(135deg, var(--app-background), var(--app-background-2) 48%, var(--app-background));
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body:lang(zh-Hans),
body:lang(zh-Hant) {
  line-height: 1.75;
}

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

a {
  color: inherit;
}

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

button {
  font: inherit;
}

:focus-visible {
  outline: 3px solid rgba(190, 232, 207, 0.48);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  left: 1rem;
  top: 1rem;
  z-index: 200;
  transform: translateY(-160%);
  padding: 0.65rem 0.9rem;
  border: 1px solid var(--app-border);
  border-radius: var(--radius);
  background: var(--app-surface);
  color: var(--app-mint);
  text-decoration: none;
  box-shadow: var(--shadow-card);
}

.skip-link:focus {
  transform: translateY(0);
}

.container {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--app-border);
  background: rgba(8, 17, 13, 0.86);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.header-inner {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  position: relative;
}

.brand,
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  min-width: 0;
  color: var(--app-ivory);
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

.brand-logo {
  width: 34px;
  height: 34px;
  border-radius: var(--radius);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.38), var(--shadow-glow);
}

.site-nav {
  position: absolute;
  top: calc(100% + 1px);
  left: 0;
  right: 0;
  display: none;
  grid-template-columns: 1fr;
  gap: 0.2rem;
  padding: var(--space-3);
  border: 1px solid var(--app-border);
  border-top: 0;
  border-radius: 0 0 var(--radius) var(--radius);
  background: rgba(16, 28, 22, 0.98);
  box-shadow: var(--shadow-card);
}

.site-nav.is-open {
  display: grid;
}

.site-nav a,
.mobile-nav-cta,
.header-cta {
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 650;
}

.site-nav a {
  padding: 0.8rem 0.85rem;
  border-radius: var(--radius);
  color: var(--app-muted);
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--app-mint);
  background: rgba(255, 255, 255, 0.045);
}

.mobile-nav-cta {
  color: var(--app-background) !important;
  background: var(--app-mint) !important;
  text-align: center;
}

.header-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.45rem;
}

.language-selector {
  min-width: 136px;
  border: 1px solid var(--app-border);
  border-radius: var(--radius);
  background: var(--app-surface);
  position: relative;
}

.language-selector::after {
  content: "";
  position: absolute;
  right: 0.75rem;
  top: 50%;
  width: 0.45rem;
  height: 0.45rem;
  border-right: 2px solid var(--app-mint);
  border-bottom: 2px solid var(--app-mint);
  pointer-events: none;
  transform: translateY(-68%) rotate(45deg);
}

.language-select {
  width: 100%;
  height: 38px;
  appearance: none;
  -webkit-appearance: none;
  padding: 0 2rem 0 0.78rem;
  border: 0;
  border-radius: var(--radius);
  background: transparent;
  color: var(--app-mint);
  font-size: 0.86rem;
  font-weight: 750;
  cursor: pointer;
}

.language-select option {
  background: var(--app-surface);
  color: var(--app-ivory);
}

.header-cta {
  display: none;
  padding: 0.58rem 0.9rem;
  border-radius: var(--radius);
  color: var(--app-background);
  background: var(--app-mint);
}

.menu-toggle {
  width: 42px;
  height: 42px;
  display: inline-grid;
  place-items: center;
  border: 1px solid var(--app-border);
  border-radius: var(--radius);
  background: var(--app-surface);
  cursor: pointer;
}

.menu-toggle span {
  width: 17px;
  height: 2px;
  grid-area: 1 / 1;
  border-radius: 999px;
  background: var(--app-ivory);
  transition: transform var(--transition);
}

.menu-toggle span:first-child {
  transform: translateY(-4px);
}

.menu-toggle span:last-child {
  transform: translateY(4px);
}

.menu-toggle.is-open span:first-child {
  transform: rotate(45deg);
}

.menu-toggle.is-open span:last-child {
  transform: rotate(-45deg);
}

main {
  flex: 1;
}

.hero {
  padding: 4rem 0 3.5rem;
  overflow: hidden;
}

.hero-inner {
  text-align: center;
}

.hero-logo {
  width: 92px;
  height: 92px;
  margin: 0 auto var(--space-4);
  border-radius: 22px;
  box-shadow: 0 24px 54px rgba(0, 0, 0, 0.5), var(--shadow-glow);
}

.eyebrow,
.section-label,
.notice-label,
.panel-kicker {
  margin: 0;
  color: var(--app-primary);
  font-size: 0.78rem;
  font-weight: 780;
  text-transform: uppercase;
}

body:lang(zh-Hans) .eyebrow,
body:lang(zh-Hant) .eyebrow,
body:lang(zh-Hans) .section-label,
body:lang(zh-Hant) .section-label,
body:lang(zh-Hans) .notice-label,
body:lang(zh-Hant) .notice-label,
body:lang(zh-Hans) .panel-kicker,
body:lang(zh-Hant) .panel-kicker {
  text-transform: none;
}

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

h1,
h2,
h3 {
  line-height: 1.12;
  color: var(--app-ivory);
}

.hero h1 {
  max-width: 820px;
  margin: var(--space-2) auto var(--space-4);
  color: var(--app-ivory);
  font-size: 2.38rem;
  font-weight: 760;
  overflow-wrap: break-word;
}

.hero-lead {
  max-width: 720px;
  margin: 0 auto;
  color: var(--app-muted);
  font-size: 1.06rem;
}

.hero-actions {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0.75rem;
  width: min(100%, 360px);
  margin: var(--space-5) auto 0;
}

.button {
  display: inline-flex;
  min-height: 56px;
  align-items: center;
  justify-content: center;
  padding: 0.82rem 1.2rem;
  border-radius: var(--radius);
  font-weight: 750;
  text-decoration: none;
  transition: transform var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  color: var(--app-background);
  background: var(--app-mint);
}

.button-primary:hover {
  background: #D2F4DE;
}

.button-secondary {
  color: var(--app-ivory);
  background: var(--app-elevated);
  border: 1px solid var(--app-border);
}

.button-secondary:hover {
  border-color: rgba(190, 232, 207, 0.24);
}

.product-visual {
  position: relative;
  width: min(100%, 920px);
  min-height: 630px;
  margin: 3.5rem auto 0;
  display: grid;
  place-items: center;
  isolation: isolate;
}

.product-visual::before {
  content: "";
  position: absolute;
  inset: 5% 2% 8%;
  z-index: -1;
  border: 1px solid var(--app-border);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(23, 38, 31, 0.96), rgba(16, 28, 22, 0.94)),
    var(--app-surface);
  box-shadow: var(--shadow-card);
}

.phone-shell {
  width: min(78vw, 302px);
  min-width: 236px;
  aspect-ratio: 0.52;
  padding: 0.72rem;
  border: 7px solid #020806;
  border-radius: 38px;
  background: #020806;
  box-shadow: 0 34px 70px rgba(0, 0, 0, 0.48), var(--shadow-glow);
}

.phone-top {
  width: 42%;
  height: 11px;
  margin: 0.2rem auto 0.6rem;
  border-radius: 999px;
  background: var(--app-primary-deep);
}

.phone-screen {
  height: calc(100% - 1.1rem);
  overflow: hidden;
  border-radius: 28px;
  padding: 1rem;
  background:
    linear-gradient(180deg, var(--app-background), #0A1510 100%),
    var(--app-background);
}

.screen-header {
  min-height: 38px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  margin-bottom: 0.8rem;
  color: var(--app-ivory);
  font-size: 0.78rem;
  font-weight: 780;
}

.mini-card {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  align-items: center;
  gap: 0.68rem;
  min-height: 58px;
  margin-bottom: 0.68rem;
  padding: 0.7rem;
  border: 1px solid var(--app-border);
  border-radius: var(--radius);
  background: var(--app-surface);
  color: var(--app-ivory);
  text-align: left;
}

.mini-card strong {
  min-width: 0;
  overflow-wrap: anywhere;
  font-size: 0.88rem;
  line-height: 1.25;
}

.mini-card-muted {
  background: rgba(60, 179, 113, 0.1);
}

.mini-icon,
.feature-mark {
  display: inline-block;
  width: 28px;
  height: 28px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--app-primary), var(--app-primary-deep));
}

.mini-icon-warm,
.feature-mark-warm {
  background: linear-gradient(135deg, var(--app-warning), var(--app-gold));
}

.mini-icon-blue,
.feature-mark-blue {
  background: linear-gradient(135deg, var(--app-sky), #4D8FB0);
}

.mini-icon-dark,
.feature-mark-dark {
  background: linear-gradient(135deg, var(--app-rose), #9B4F4A);
}

.visual-panel {
  position: absolute;
  width: min(68vw, 264px);
  padding: 1rem;
  border: 1px solid var(--app-border);
  border-radius: var(--radius);
  background: rgba(16, 28, 22, 0.9);
  box-shadow: var(--shadow-card);
  text-align: left;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.visual-panel strong {
  display: block;
  margin: 0.3rem 0 0.8rem;
  color: var(--app-ivory);
}

.visual-panel-left {
  left: 0;
  top: 3rem;
}

.visual-panel-right {
  right: 0;
  bottom: 4.5rem;
}

.progress-line {
  height: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
}

.progress-line span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--app-primary);
}

.signal-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  align-items: end;
  gap: 0.35rem;
  height: 42px;
}

.signal-row span {
  border-radius: 999px;
  background: linear-gradient(180deg, var(--app-mint), var(--app-primary));
}

.signal-row span:nth-child(1) {
  height: 50%;
}

.signal-row span:nth-child(2) {
  height: 78%;
}

.signal-row span:nth-child(3) {
  height: 62%;
}

.signal-row span:nth-child(4) {
  height: 88%;
}

.visual-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.7rem;
  margin: 0;
  color: var(--app-muted);
  font-size: 0.85rem;
  text-align: center;
}

.status-section,
.feature-section,
.contact-section {
  background: rgba(255, 255, 255, 0.02);
}

.status-section {
  padding: 2.5rem 0;
  border-top: 1px solid var(--app-border);
  border-bottom: 1px solid var(--app-border);
}

.notice-grid {
  display: grid;
  gap: var(--space-3);
}

.notice-card,
.feature-card,
.text-panel,
.contact-panel,
.document-card,
.not-found-panel {
  border: 1px solid var(--app-border);
  border-radius: var(--radius);
  background: var(--app-surface);
  box-shadow: var(--shadow-card);
}

.notice-card {
  padding: 1.25rem;
}

.notice-card p {
  margin: 0.35rem 0 0;
  color: var(--app-muted);
}

.content-section {
  padding: 4.5rem 0;
}

.section-narrow {
  max-width: 760px;
}

.section-narrow h2,
.section-heading h2,
.text-panel h2,
.contact-panel h2,
.document-header h1,
.not-found-panel h1 {
  margin-bottom: var(--space-3);
  font-size: 2rem;
  font-weight: 740;
}

.section-narrow p:not(.section-label),
.section-heading,
.text-panel p,
.contact-panel p,
.document-header p,
.document-content p,
.faq-item p,
.not-found-panel p {
  color: var(--app-muted);
}

.section-narrow p:last-child,
.text-panel p:last-child,
.contact-panel p:last-child,
.document-content p:last-child,
.faq-item p:last-child,
.not-found-panel p:last-child {
  margin-bottom: 0;
}

.section-heading {
  max-width: 760px;
  margin-bottom: var(--space-5);
}

.feature-grid {
  display: grid;
  gap: var(--space-3);
}

.feature-card {
  min-height: 228px;
  padding: 1.35rem;
  transition: transform var(--transition), border-color var(--transition), background var(--transition);
}

.feature-card:hover {
  transform: translateY(-3px);
  border-color: rgba(190, 232, 207, 0.22);
  background: var(--app-elevated);
}

.feature-card h3 {
  margin: var(--space-4) 0 var(--space-2);
  font-size: 1.18rem;
}

.feature-card p {
  margin-bottom: 0;
  color: var(--app-muted);
}

.split-layout {
  display: grid;
  gap: var(--space-3);
}

.text-panel,
.contact-panel {
  padding: 1.5rem;
}

.accent-panel {
  background:
    linear-gradient(135deg, rgba(23, 38, 31, 0.95), rgba(14, 91, 59, 0.28)),
    var(--app-surface);
}

.text-link,
.document-content a,
.document-header a,
.faq-item a,
.contact-panel a,
.footer-contact a,
.footer-links a {
  color: var(--app-mint);
  font-weight: 700;
  text-decoration-thickness: 1.5px;
  text-underline-offset: 0.2em;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  text-decoration: none;
}

.text-link::after {
  content: "→";
  line-height: 1;
}

.text-link:hover {
  text-decoration: underline;
}

.contact-panel {
  max-width: 820px;
}

.document-page {
  padding: 3rem 0 4.5rem;
}

.document-card {
  width: min(880px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1.35rem;
}

.document-header {
  padding-bottom: var(--space-5);
  border-bottom: 1px solid var(--app-border);
  margin-bottom: var(--space-5);
}

.document-header h1 {
  color: var(--app-ivory);
}

.effective-date {
  color: var(--app-ivory) !important;
}

.document-content h2,
.faq-list h2 {
  margin: 2rem 0 var(--space-2);
  color: var(--app-ivory);
  font-size: 1.2rem;
}

.document-content p {
  margin-bottom: var(--space-3);
}

.emergency-note {
  padding: 1rem;
  border-left: 4px solid var(--app-warning);
  border-radius: var(--radius);
  background: rgba(226, 182, 101, 0.1);
  color: var(--app-ivory) !important;
  font-weight: 700;
}

.support-card .document-header {
  margin-bottom: var(--space-4);
}

.faq-list h2 {
  margin-top: 0;
}

.faq-item {
  padding: 1rem 0;
  border-top: 1px solid var(--app-border);
}

.faq-item h3 {
  margin-bottom: 0.45rem;
  font-size: 1.05rem;
}

.not-found-page {
  display: grid;
  min-height: 62vh;
  place-items: center;
  padding: 3rem 0;
}

.not-found-panel {
  max-width: 680px;
  padding: 2rem;
  text-align: center;
}

.not-found-panel .button {
  margin-top: var(--space-3);
}

.site-footer {
  margin-top: auto;
  padding: 2.5rem 0;
  border-top: 1px solid var(--app-border);
  background: #050907;
  color: rgba(243, 241, 232, 0.66);
}

.footer-layout {
  display: grid;
  gap: var(--space-5);
}

.footer-brand {
  color: var(--app-ivory);
  margin-bottom: 0.55rem;
}

.footer-layout p {
  margin: 0;
  font-size: 0.93rem;
}

.footer-links,
.footer-contact {
  display: grid;
  gap: 0.55rem;
}

.footer-links a,
.footer-contact a {
  color: rgba(243, 241, 232, 0.76);
}

.footer-links a:hover,
.footer-contact a:hover {
  color: var(--app-mint);
}

@media (max-width: 599px) {
  .product-visual {
    width: min(100%, 340px);
    min-height: auto;
    gap: 1rem;
    margin-top: 3rem;
    padding: 1rem;
  }

  .product-visual::before {
    inset: 0;
  }

  .visual-panel,
  .visual-caption {
    position: static;
  }

  .visual-panel {
    width: 100%;
  }

  .phone-shell {
    width: min(100%, 246px);
  }

  .visual-caption {
    font-size: 0.82rem;
  }
}

@media (max-width: 430px) {
  .brand span {
    max-width: 118px;
    overflow: hidden;
    text-overflow: ellipsis;
    font-size: 0.95rem;
  }

  .language-selector {
    min-width: 104px;
  }

  .language-select {
    height: 36px;
    padding-left: 0.62rem;
    padding-right: 1.7rem;
    font-size: 0.76rem;
  }

  .language-selector::after {
    right: 0.58rem;
    width: 0.38rem;
    height: 0.38rem;
  }

  .menu-toggle {
    width: 38px;
    height: 38px;
  }

  .header-inner {
    gap: 0.35rem;
  }

  .hero h1 {
    max-width: 340px;
    font-size: 1.95rem;
  }

  .hero-lead {
    max-width: 340px;
    font-size: 1rem;
  }

  .hero-actions {
    width: min(100%, 320px);
  }
}

@media (min-width: 600px) {
  .container {
    width: min(1120px, calc(100% - 3rem));
  }

  .header-cta {
    display: inline-flex;
  }

  .hero {
    padding-top: 5.25rem;
  }

  .hero-logo {
    width: 104px;
    height: 104px;
    border-radius: 26px;
  }

  .hero h1 {
    font-size: 3.2rem;
  }

  .hero-lead {
    font-size: 1.16rem;
  }

  .hero-actions {
    width: auto;
    flex-direction: row;
    justify-content: center;
    align-items: center;
  }

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

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

  .text-panel,
  .contact-panel,
  .document-card {
    padding: 2rem;
  }
}

@media (min-width: 900px) {
  .header-inner {
    min-height: 76px;
  }

  .site-nav {
    position: static;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
  }

  .site-nav a {
    padding: 0.45rem 0.72rem;
  }

  .mobile-nav-cta {
    display: none;
  }

  .menu-toggle {
    display: none;
  }

  .hero {
    padding: 6.5rem 0 5rem;
  }

  .hero-logo {
    width: 118px;
    height: 118px;
    border-radius: 30px;
  }

  .hero h1 {
    font-size: 4rem;
  }

  .product-visual {
    min-height: 650px;
    margin-top: 4.5rem;
  }

  .phone-shell {
    width: 322px;
  }

  .visual-panel-left {
    left: 5.8rem;
    top: 5rem;
  }

  .visual-panel-right {
    right: 4.6rem;
    bottom: 6rem;
  }

  .content-section {
    padding: 6rem 0;
  }

  .section-narrow h2,
  .section-heading h2,
  .text-panel h2,
  .contact-panel h2,
  .document-header h1,
  .not-found-panel h1 {
    font-size: 2.45rem;
  }

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

  .feature-card {
    padding: 1.55rem;
  }

  .footer-layout {
    grid-template-columns: 1.4fr 1fr 1.3fr;
    align-items: start;
  }
}