:root {
  color-scheme: light dark;
  --bg: #F7F8FA;
  --card-bg: #FFFFFF;
  --text: #1C2333;
  --text-secondary: #64707D;
  --border: rgba(28, 35, 51, 0.10);
  --shadow: 0 20px 50px rgba(28, 35, 51, 0.10);

  --teal: #2AC2AF;
  --teal-strong: #17A398;
  --coral: #F0A2AC;
  --coral-strong: #E67C8C;
  --gold: #F5C84C;
  --gold-strong: #E0AC1F;

  --accent-a: var(--teal);
  --accent-b: var(--coral);
  --accent-solid: var(--teal-strong);

  --orb-1: rgba(42, 194, 175, 0.30);
  --orb-2: rgba(240, 162, 172, 0.30);
  --orb-3: rgba(245, 200, 76, 0.26);
  --dot-color: rgba(28, 35, 51, 0.07);
}

/* Dark tokens apply when the system prefers dark (and the user hasn't forced light),
   OR when the user has explicitly picked dark via the theme toggle. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0B0D12;
    --card-bg: #14171E;
    --text: #F2F4F7;
    --text-secondary: #98A2B3;
    --border: rgba(255, 255, 255, 0.10);
    --shadow: 0 20px 50px rgba(0, 0, 0, 0.45);

    --teal: #34D8C4;
    --teal-strong: #5EE6D5;
    --coral: #F3ADB6;
    --coral-strong: #F7C1C8;
    --gold: #F6CE5C;
    --gold-strong: #F9DA82;

    --accent-solid: var(--teal-strong);
    --orb-1: rgba(52, 216, 196, 0.28);
    --orb-2: rgba(243, 173, 182, 0.22);
    --orb-3: rgba(246, 206, 92, 0.20);
    --dot-color: rgba(255, 255, 255, 0.06);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #0B0D12;
  --card-bg: #14171E;
  --text: #F2F4F7;
  --text-secondary: #98A2B3;
  --border: rgba(255, 255, 255, 0.10);
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.45);

  --teal: #34D8C4;
  --teal-strong: #5EE6D5;
  --coral: #F3ADB6;
  --coral-strong: #F7C1C8;
  --gold: #F6CE5C;
  --gold-strong: #F9DA82;

  --accent-solid: var(--teal-strong);
  --orb-1: rgba(52, 216, 196, 0.28);
  --orb-2: rgba(243, 173, 182, 0.22);
  --orb-3: rgba(246, 206, 92, 0.20);
  --dot-color: rgba(255, 255, 255, 0.06);
  color-scheme: dark;
}

:root[data-theme="light"] {
  color-scheme: light;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
}

body {
  position: relative;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
    "Noto Sans SC", "Noto Sans TC", "Noto Sans JP", "Noto Sans KR", "Noto Sans Arabic",
    "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
  overflow-x: hidden;
  background-image: radial-gradient(var(--dot-color) 1.2px, transparent 1.2px);
  background-size: 22px 22px;
}

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

.container {
  max-width: 1080px;
  margin-inline: auto;
  padding-inline: 24px;
}

/* Background orbs — spread down the whole document so color shows up while scrolling,
   not just near the top of the viewport. */
.orb-field {
  position: absolute;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
}
.orb-a {
  width: 480px;
  height: 480px;
  background: var(--orb-1);
  top: -160px;
  inset-inline-end: -120px;
}
.orb-b {
  width: 420px;
  height: 420px;
  background: var(--orb-2);
  top: 620px;
  inset-inline-start: -140px;
}
.orb-c {
  width: 340px;
  height: 340px;
  background: var(--orb-3);
  top: 1180px;
  inset-inline-end: -100px;
}
.orb-d {
  width: 400px;
  height: 400px;
  background: var(--orb-1);
  top: 1700px;
  inset-inline-start: -120px;
}
.orb-e {
  width: 360px;
  height: 360px;
  background: var(--orb-2);
  bottom: -140px;
  inset-inline-end: -80px;
}

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 14px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.01em;
}
.brand svg { width: 26px; height: 26px; }

.nav-controls {
  display: flex;
  align-items: center;
  gap: 10px;
}

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--card-bg);
  border: 1px solid var(--border);
  color: var(--text);
  cursor: pointer;
  padding: 0;
}
.icon-btn svg { width: 17px; height: 17px; }

.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

.lang-menu { position: relative; }
.lang-dropdown {
  position: absolute;
  top: calc(100% + 10px);
  inset-inline-end: 0;
  min-width: 180px;
  margin: 0;
  padding: 6px;
  list-style: none;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow);
  z-index: 20;
}
.lang-dropdown[hidden] { display: none; }
.lang-dropdown a {
  display: block;
  padding: 9px 12px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
}
.lang-dropdown a:hover { background: color-mix(in srgb, var(--teal) 10%, transparent); }
.lang-dropdown a.is-active {
  background: color-mix(in srgb, var(--teal) 14%, transparent);
  color: var(--teal-strong);
  font-weight: 700;
}

/* Hero — soft color wash fading into the page background, no hard seam.
   You are the center; your data drifts around you as bubbles in orbit. */
.hero {
  position: relative;
  overflow: hidden;
  padding-block: 100px 72px;
  text-align: center;
  background: linear-gradient(
    180deg,
    color-mix(in srgb, var(--teal) 18%, var(--bg)) 0%,
    color-mix(in srgb, var(--coral) 12%, var(--bg)) 38%,
    var(--bg) 100%
  );
}
.hero > .container { position: relative; z-index: 1; }

.orbit-field {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}
.orbit-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px dashed color-mix(in srgb, var(--text) 14%, transparent);
}
.orbit-ring.r1 { width: 200px; height: 200px; animation: spin 16s linear infinite; animation-delay: -3s; }
.orbit-ring.r2 { width: 320px; height: 320px; animation: spin 24s linear infinite reverse; animation-delay: -9s; }
.orbit-ring.r3 { width: 440px; height: 440px; animation: spin 32s linear infinite; animation-delay: -17s; }
.orbit-ring.r4 { width: 580px; height: 580px; animation: spin 42s linear infinite reverse; animation-delay: -25s; }
@keyframes spin { to { transform: rotate(360deg); } }

.bubble {
  position: absolute;
  top: 50%;
  left: 0;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background:
    radial-gradient(circle at 32% 26%, rgba(255, 255, 255, 0.75), transparent 46%),
    radial-gradient(circle at 68% 74%, var(--bubble-tint), transparent 72%);
  border: 1px solid color-mix(in srgb, var(--text) 10%, transparent);
  box-shadow: var(--shadow);
}
.orbit-ring.r1 .bubble { width: 20px; height: 20px; --bubble-tint: rgba(42, 194, 175, 0.8); }
.orbit-ring.r2 .bubble { width: 34px; height: 34px; --bubble-tint: rgba(240, 162, 172, 0.75); top: 12%; }
.orbit-ring.r3 .bubble { width: 16px; height: 16px; --bubble-tint: rgba(245, 200, 76, 0.75); top: 85%; left: 8%; }
.orbit-ring.r4 .bubble { width: 40px; height: 40px; --bubble-tint: rgba(42, 194, 175, 0.5); top: 30%; left: 4%; }

.free-bubble {
  position: absolute;
  border-radius: 50%;
  background:
    radial-gradient(circle at 32% 26%, rgba(255, 255, 255, 0.6), transparent 48%),
    radial-gradient(circle at 68% 74%, var(--bubble-tint), transparent 72%);
  border: 1px solid color-mix(in srgb, var(--text) 8%, transparent);
  animation: bubble-bob 7s ease-in-out infinite;
}
.free-bubble.fb1 { width: 64px; height: 64px; top: 18%; inset-inline-start: 12%; --bubble-tint: rgba(240, 162, 172, 0.5); animation-delay: -1s; }
.free-bubble.fb2 { width: 46px; height: 46px; bottom: 14%; inset-inline-end: 14%; --bubble-tint: rgba(245, 200, 76, 0.5); animation-delay: -4s; }
.free-bubble.fb3 { width: 26px; height: 26px; bottom: 26%; inset-inline-start: 22%; --bubble-tint: rgba(42, 194, 175, 0.6); animation-delay: -2.5s; }
@keyframes bubble-bob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}

.badge {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  padding: 7px 16px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--teal) 12%, var(--card-bg));
  border: 1px solid color-mix(in srgb, var(--teal) 25%, transparent);
  color: var(--teal-strong);
  margin-bottom: 28px;
}
.badge .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--teal);
  animation: pulse-dot 1.8s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.hero h1 {
  position: relative;
  font-size: clamp(32px, 5.4vw, 58px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.08;
  margin: 0 0 20px;
  max-width: 780px;
  margin-inline: auto;
  text-wrap: balance;
  color: var(--text);
}
.hero .gradient-text {
  background: linear-gradient(120deg, var(--teal), var(--coral));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p.sub {
  position: relative;
  font-size: clamp(16px, 2vw, 19px);
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto 40px;
  text-wrap: balance;
}

.hero-visual {
  max-width: 640px;
  margin: 0 auto 8px;
  padding: 28px 20px;
}
.hero-visual svg { width: 100%; height: auto; display: block; }
.pulse-line {
  fill: none;
  stroke: url(#pulseGradient);
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 600;
  stroke-dashoffset: 600;
  animation: draw-line 2.6s ease-out forwards 0.3s;
}
@keyframes draw-line {
  to { stroke-dashoffset: 0; }
}

.cta-row { display: flex; justify-content: center; align-items: center; gap: 20px; flex-wrap: wrap; }
.cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 700;
  padding: 14px 28px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--card-bg);
  color: var(--text-secondary);
  cursor: default;
}
.cta.primary {
  background: var(--teal);
  color: #06231F;
  border: none;
  cursor: pointer;
  box-shadow: 0 14px 30px -8px color-mix(in srgb, var(--teal) 55%, transparent);
  transition: transform 0.2s ease;
}
.cta.primary svg { width: 18px; height: 18px; }
.cta.primary:hover { transform: translateY(-2px); }

.qr-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  border-radius: 16px;
  background: var(--card-bg);
  border: 1px solid var(--border);
}
.qr-card img {
  display: block;
  width: 76px;
  height: 76px;
  padding: 6px;
  border-radius: 10px;
  background: #FFFFFF;
}
.qr-card span {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
}

/* Section shared */
section { padding-block: 72px; }
.eyebrow {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--teal-strong);
  margin: 0 0 12px;
  text-align: center;
}
.section-title {
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 800;
  letter-spacing: -0.02em;
  text-align: center;
  margin: 0 0 16px;
  text-wrap: balance;
}
.section-sub {
  font-size: 16px;
  color: var(--text-secondary);
  text-align: center;
  max-width: 560px;
  margin: 0 auto 56px;
  text-wrap: balance;
}

/* Accent color rotation (teal / coral / gold) */
.c-teal .icon-wrap, .step-num.c-teal {
  background: color-mix(in srgb, var(--teal) 16%, transparent);
  color: var(--teal-strong);
}
.c-coral .icon-wrap, .step-num.c-coral {
  background: color-mix(in srgb, var(--coral) 22%, transparent);
  color: var(--coral-strong);
}
.c-gold .icon-wrap, .step-num.c-gold {
  background: color-mix(in srgb, var(--gold) 22%, transparent);
  color: var(--gold-strong);
}
.c-teal .icon-wrap svg { stroke: var(--teal-strong); }
.c-coral .icon-wrap svg { stroke: var(--coral-strong); }
.c-gold .icon-wrap svg { stroke: var(--gold-strong); }

.feature-card.c-teal:hover { border-color: color-mix(in srgb, var(--teal) 40%, transparent); box-shadow: 0 20px 50px -12px color-mix(in srgb, var(--teal) 30%, transparent); }
.feature-card.c-coral:hover { border-color: color-mix(in srgb, var(--coral) 45%, transparent); box-shadow: 0 20px 50px -12px color-mix(in srgb, var(--coral) 32%, transparent); }
.feature-card.c-gold:hover { border-color: color-mix(in srgb, var(--gold) 45%, transparent); box-shadow: 0 20px 50px -12px color-mix(in srgb, var(--gold) 32%, transparent); }

/* How it works */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.step {
  padding: 28px 24px;
  border-radius: 22px;
  background: var(--card-bg);
  border: 1px solid var(--border);
}
.step-num {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 800;
  margin-bottom: 18px;
}
.step h3 { font-size: 17px; font-weight: 700; margin: 0 0 8px; letter-spacing: -0.01em; }
.step p { font-size: 14.5px; color: var(--text-secondary); margin: 0; }

/* Feature grid */
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.feature-card {
  padding: 26px 24px;
  border-radius: 22px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  box-shadow: 0 1px 2px rgba(28, 35, 51, 0.04);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.feature-card:hover { transform: translateY(-4px); }
.icon-wrap {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}
.icon-wrap svg { width: 22px; height: 22px; }
.feature-card h3 { font-size: 16px; font-weight: 700; margin: 0 0 8px; letter-spacing: -0.01em; }
.feature-card p { font-size: 14px; color: var(--text-secondary); margin: 0; line-height: 1.55; }

/* Privacy band */
.privacy-band {
  border-radius: 26px;
  padding: 44px 36px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
}
.privacy-band .icon-wrap { flex-shrink: 0; width: 56px; height: 56px; border-radius: 18px; }
.privacy-band .icon-wrap svg { width: 28px; height: 28px; }
.privacy-band-text { flex: 1; min-width: 260px; }
.privacy-band h3 { font-size: 19px; font-weight: 700; margin: 0 0 8px; }
.privacy-band p { font-size: 14.5px; color: var(--text-secondary); margin: 0 0 6px; max-width: 620px; }
.privacy-link {
  font-size: 14px;
  font-weight: 700;
  color: var(--teal-strong);
  white-space: nowrap;
}
.privacy-link .arrow { display: inline-block; transition: transform 0.2s ease; }
.privacy-link:hover .arrow { transform: translateX(4px); }
[dir="rtl"] .privacy-link:hover .arrow { transform: translateX(-4px); }

/* Footer */
footer {
  border-top: 1px solid var(--border);
  padding-block: 32px;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 13px;
  color: var(--text-secondary);
}
.footer-links { display: flex; gap: 20px; }
.footer-links a:hover { color: var(--text); }

/* Privacy policy page */
.policy {
  padding-block: 56px 80px;
  max-width: 720px;
  margin-inline: auto;
}
.policy h1 { font-size: 28px; font-weight: 800; margin: 0 0 6px; letter-spacing: -0.02em; }
.policy .updated { font-size: 13px; color: var(--text-secondary); margin: 0 0 36px; }
.policy h2 { font-size: 18px; font-weight: 700; margin: 32px 0 10px; }
.policy p { font-size: 15px; margin: 0 0 14px; color: var(--text); }
.policy ul { margin: 0 0 14px; padding-inline-start: 20px; }
.policy li { font-size: 15px; margin-bottom: 8px; }
.policy a { color: var(--teal-strong); font-weight: 600; }
.back-link { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; font-weight: 600; color: var(--text-secondary); margin-bottom: 28px; }
.back-link:hover { color: var(--text); }
[dir="rtl"] .back-link svg { transform: scaleX(-1); }

@media (max-width: 800px) {
  .steps, .features { grid-template-columns: 1fr; }
  .hero { padding-block: 64px 44px; }
  section { padding-block: 52px; }
}