:root {
  --ink: #1b1b28;
  --ink-soft: #2c2a45;
  --ink-muted: #8a8aa0;
  --steel: #5b5ce6;
  --steel-soft: #7a7bf0;
  --sky: #ebe9f8;
  --mist: #f4f1fa;
  --paper: #faf9fc;
  --line: rgba(70, 60, 110, 0.1);
  --white: #ffffff;
  --shadow: 0 24px 60px rgba(91, 92, 230, 0.16);
  --radius: 20px;
  --font-display: "Instrument Serif", "Noto Sans SC", "Noto Sans TC", Georgia, serif;
  --font-body: "Manrope", "Noto Sans SC", "Noto Sans TC", system-ui, sans-serif;
  --header-h: 72px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--font-body);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(63, 80, 255, 0.12), transparent 55%),
    radial-gradient(900px 500px at 90% 0%, rgba(73, 128, 255, 0.1), transparent 50%),
    linear-gradient(180deg, #f7f8fc 0%, var(--paper) 40%, #eef1f8 100%);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  cursor: pointer;
  border: 0;
  background: none;
  color: inherit;
}

.grain {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 50;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.shell {
  width: min(1120px, calc(100% - 2.5rem));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(16px);
  background: rgba(250, 251, 254, 0.78);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: var(--header-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand img {
  border-radius: 10px;
}

.nav {
  display: none;
  gap: 1.75rem;
}

.nav a {
  color: var(--ink-muted);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-left: auto;
}

.header-actions .btn-primary {
  display: none;
}

.lang-switch {
  display: inline-grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: stretch;
  height: 36px;
  padding: 3px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
  gap: 2px;
}

.lang-switch__btn {
  min-width: 34px;
  padding: 0 0.55rem;
  border-radius: 999px;
  border: 0;
  background: transparent;
  color: var(--ink-muted);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1;
  transition: background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

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

.lang-switch__btn.is-active {
  background: var(--ink);
  color: var(--white);
  box-shadow: 0 6px 14px rgba(27, 27, 40, 0.18);
}

.lang-switch__btn:focus-visible {
  outline: 2px solid var(--steel);
  outline-offset: 2px;
}

.menu-toggle {
  width: 44px;
  height: 44px;
  display: grid;
  place-content: center;
  gap: 6px;
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--ink);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.menu-toggle[aria-expanded="true"] span:first-child {
  transform: translateY(4px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] span:last-child {
  transform: translateY(-4px) rotate(-45deg);
}

.mobile-nav {
  display: grid;
  gap: 0.25rem;
  padding: 0.5rem 1.25rem 1.25rem;
  border-bottom: 1px solid var(--line);
  background: rgba(250, 251, 254, 0.95);
}

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

.mobile-nav a {
  padding: 0.85rem 0.5rem;
  border-radius: 12px;
  color: var(--ink);
  font-weight: 500;
}

.mobile-nav a:hover {
  background: var(--sky);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  min-height: 48px;
  padding: 0 1.35rem;
  border-radius: 999px;
  font-weight: 600;
  transition: transform 0.2s ease, background 0.2s ease, box-shadow 0.2s ease, color 0.2s ease;
}

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

.btn-sm {
  min-height: 36px;
  padding: 0 1rem;
  font-size: 0.875rem;
}

.btn-primary {
  background: var(--ink);
  color: var(--white);
  box-shadow: 0 10px 28px rgba(33, 31, 55, 0.28);
}

.btn-primary:hover {
  background: var(--ink-soft);
}

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}

.btn-ghost:hover {
  border-color: rgba(63, 80, 255, 0.4);
  color: var(--steel);
}

.hero {
  position: relative;
  min-height: calc(100svh - var(--header-h));
  display: flex;
  align-items: center;
  overflow: hidden;
  isolation: isolate;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(40px);
  animation: float 10s ease-in-out infinite;
}

.orb-a {
  width: min(52vw, 520px);
  height: min(52vw, 520px);
  top: -8%;
  right: -6%;
  background: radial-gradient(circle, rgba(63, 80, 255, 0.35), transparent 70%);
}

.orb-b {
  width: min(40vw, 380px);
  height: min(40vw, 380px);
  bottom: 5%;
  left: -8%;
  background: radial-gradient(circle, rgba(33, 31, 55, 0.18), transparent 70%);
  animation-delay: -4s;
}

.grid-lines {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(33, 31, 55, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(33, 31, 55, 0.04) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at center, black 20%, transparent 75%);
}

.hero-inner {
  display: grid;
  gap: 3rem;
  padding: 3.5rem 0 4rem;
  align-items: center;
}

.eyebrow {
  margin: 0 0 0.75rem;
  color: var(--steel);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.brand-hero {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(3.4rem, 10vw, 6.4rem);
  font-weight: 400;
  line-height: 0.95;
  letter-spacing: -0.03em;
}

.hero-slogan {
  margin: 1rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 1.85rem);
  font-style: italic;
  color: var(--ink-soft);
}

.hero-lead {
  margin: 1.25rem 0 0;
  max-width: 34rem;
  color: var(--ink-muted);
  font-size: 1.05rem;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.hero-visual {
  display: flex;
  justify-content: center;
}

.phone-frame {
  width: min(100%, 320px);
  padding: 14px;
  border-radius: 36px;
  background: linear-gradient(160deg, #2a2844, #161524 70%);
  box-shadow: var(--shadow);
  animation: rise 1s ease both;
}

.phone-screen {
  border-radius: 28px;
  padding: 1.15rem 1.1rem 1.35rem;
  background:
    radial-gradient(circle at top right, rgba(63, 80, 255, 0.35), transparent 45%),
    linear-gradient(180deg, #2f2d4a, #1c1a2e);
  color: var(--white);
  min-height: 420px;
}

.phone-status {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  opacity: 0.8;
  margin-bottom: 1.4rem;
}

.phone-brand {
  font-weight: 600;
}

.pay-card {
  border-radius: 18px;
  padding: 1.15rem 1.2rem;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.18), rgba(255, 255, 255, 0.04)),
    linear-gradient(145deg, #3f50ff, #211f37 80%);
  border: 1px solid rgba(255, 255, 255, 0.18);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.28);
  animation: cardTilt 7s ease-in-out infinite;
}

.pay-card-top,
.pay-card-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

.chip {
  width: 34px;
  height: 24px;
  border-radius: 6px;
  background: linear-gradient(135deg, #f6e7b5, #d4b56a);
}

.pay-card-number {
  margin: 1.6rem 0 1.35rem;
  font-size: 1.05rem;
  letter-spacing: 0.14em;
  font-weight: 500;
}

.phone-rows {
  margin-top: 1.35rem;
  display: grid;
  gap: 0.7rem;
}

.phone-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0.95rem;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.08);
  font-size: 0.9rem;
}

.phone-row.muted {
  opacity: 0.75;
}

.section {
  padding: 5.5rem 0;
}

.section-head {
  max-width: 38rem;
  margin-bottom: 2.5rem;
}

.section-head h2,
.security-copy h2,
.download-inner h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.section-head p,
.security-copy p,
.download-inner p {
  margin: 0.9rem 0 0;
  color: var(--ink-muted);
}

.feature-grid {
  display: grid;
  gap: 1rem;
}

.feature {
  padding: 1.5rem 1.35rem;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line);
  backdrop-filter: blur(8px);
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.feature:hover {
  transform: translateY(-4px);
  border-color: rgba(63, 80, 255, 0.28);
  box-shadow: 0 16px 40px rgba(33, 31, 55, 0.08);
}

.feature-icon {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  margin-bottom: 1.1rem;
  background: var(--sky);
  color: var(--steel);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.feature h3 {
  margin: 0;
  font-size: 1.15rem;
}

.feature p {
  margin: 0.55rem 0 0;
  color: var(--ink-muted);
  font-size: 0.95rem;
}

.security {
  background:
    radial-gradient(700px 320px at 85% 20%, rgba(63, 80, 255, 0.16), transparent 60%),
    linear-gradient(180deg, #1d1b30, #211f37);
  color: var(--white);
}

.security-inner {
  display: grid;
  gap: 2.5rem;
  align-items: center;
}

.security-copy p,
.security .section-head p {
  color: rgba(255, 255, 255, 0.68);
}

.security-list {
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.7rem;
}

.security-list li {
  position: relative;
  padding-left: 1.4rem;
  color: rgba(255, 255, 255, 0.88);
}

.security-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--steel-soft);
  box-shadow: 0 0 0 4px rgba(63, 80, 255, 0.2);
}

.security-panel {
  justify-self: center;
  width: min(100%, 320px);
  aspect-ratio: 1;
  border-radius: 28px;
  display: grid;
  place-content: center;
  gap: 1rem;
  text-align: center;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.shield {
  position: relative;
  width: 140px;
  height: 140px;
  margin-inline: auto;
  display: grid;
  place-items: center;
}

.shield-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px solid rgba(107, 122, 255, 0.55);
  animation: pulse 3.2s ease-in-out infinite;
}

.shield-core {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: linear-gradient(145deg, var(--steel), #211f37);
  font-weight: 700;
  letter-spacing: 0.08em;
  box-shadow: 0 0 40px rgba(63, 80, 255, 0.45);
}

.security-panel p {
  margin: 0;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.95rem;
}

.download {
  background: linear-gradient(180deg, transparent, rgba(63, 80, 255, 0.05));
}

.download-inner {
  text-align: center;
  max-width: 40rem;
  margin-inline: auto;
}

.store-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.85rem;
  margin-top: 2rem;
}

.store-btn {
  min-width: 180px;
  padding: 0.95rem 1.25rem;
  border-radius: 16px;
  background: var(--ink);
  color: var(--white);
  text-align: left;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.store-btn:hover {
  transform: translateY(-2px);
}

.store-btn[aria-disabled="true"] {
  opacity: 0.72;
  cursor: default;
}

.store-label {
  display: block;
  font-size: 0.75rem;
  opacity: 0.7;
  margin-bottom: 0.15rem;
}

.store-btn strong {
  font-size: 1.05rem;
}

.download-note {
  margin-top: 1rem !important;
  font-size: 0.85rem;
}

.contact-grid {
  display: grid;
  gap: 1rem;
}

.contact-item {
  padding: 1.4rem 1.3rem;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--line);
}

.contact-item span {
  display: block;
  color: var(--ink-muted);
  font-size: 0.85rem;
  margin-bottom: 0.4rem;
}

.contact-item strong {
  font-size: 1.15rem;
  font-weight: 600;
}

.contact-item a {
  color: var(--steel);
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 2.5rem 0 3rem;
  background: rgba(255, 255, 255, 0.45);
}

.footer-inner {
  display: grid;
  gap: 1.25rem;
}

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

.footer-brand img {
  border-radius: 8px;
}

.footer-brand p {
  margin: 0.15rem 0 0;
  color: var(--ink-muted);
  font-size: 0.85rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-links a {
  color: var(--ink-muted);
  font-size: 0.9rem;
}

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

.copyright {
  margin: 0;
  color: var(--ink-muted);
  font-size: 0.85rem;
}

.legal-page .site-header {
  position: relative;
}

.legal-content {
  padding: 3rem 0 4rem;
  max-width: 760px;
}

.legal-content h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  font-weight: 400;
}

.legal-meta {
  color: var(--ink-muted);
  margin: 0.75rem 0 1.5rem;
}

.legal-content h2 {
  margin: 2rem 0 0.75rem;
  font-size: 1.2rem;
  color: var(--ink);
}

.legal-content h3 {
  margin: 1.25rem 0 0.5rem;
  font-size: 1.02rem;
  color: var(--ink);
}

.legal-content p,
.legal-content li {
  color: var(--ink-muted);
}

.legal-content ul,
.legal-content ol {
  padding-left: 1.25rem;
  margin: 0.5rem 0 1rem;
}

.legal-content li + li {
  margin-top: 0.35rem;
}

.legal-content a {
  color: var(--steel);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.legal-page .header-inner {
  gap: 0.75rem;
}

.legal-page .header-actions {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin-left: auto;
}

.legal-block[hidden] {
  display: none !important;
}

.legal-note {
  margin-top: 2.5rem;
  padding: 1rem 1.1rem;
  border-radius: 12px;
  background: var(--sky);
  color: var(--ink) !important;
  font-size: 0.9rem;
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

.reveal-delay {
  transition-delay: 0.12s;
}

.reveal-delay-2 {
  transition-delay: 0.24s;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(18px);
  }
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(28px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes cardTilt {
  0%,
  100% {
    transform: rotate(-1.5deg) translateY(0);
  }
  50% {
    transform: rotate(1.5deg) translateY(-6px);
  }
}

@keyframes pulse {
  0%,
  100% {
    transform: scale(1);
    opacity: 0.7;
  }
  50% {
    transform: scale(1.08);
    opacity: 1;
  }
}

@media (min-width: 768px) {
  .nav {
    display: flex;
  }

  .header-actions .btn-primary {
    display: inline-flex;
  }

  .menu-toggle,
  .mobile-nav {
    display: none !important;
  }

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

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

  .footer-inner {
    grid-template-columns: 1.2fr 1fr;
    align-items: center;
  }

  .copyright {
    grid-column: 1 / -1;
  }
}

@media (min-width: 980px) {
  .hero-inner {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 2rem;
    padding: 4.5rem 0 5rem;
  }

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

  .security-inner {
    grid-template-columns: 1.2fr 0.8fr;
  }
}

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

  .orb,
  .pay-card,
  .shield-ring,
  .reveal {
    animation: none !important;
    transition: none !important;
    opacity: 1;
    transform: none;
  }
}