:root {
  --bg: #04060d;
  --bg-soft: #0b1020;
  --panel: rgba(14, 18, 31, 0.72);
  --panel-strong: rgba(9, 13, 24, 0.92);
  --line: rgba(255, 255, 255, 0.1);
  --text: #f5f7ff;
  --muted: rgba(235, 240, 255, 0.74);
  --accent: #9ab9ff;
  --accent-strong: #7b61ff;
  --accent-soft: rgba(152, 184, 255, 0.18);
  --shadow: 0 32px 80px rgba(0, 0, 0, 0.44);
  --max-width: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  font-family: "Space Grotesk", "PingFang TC", "Microsoft JhengHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 20% 18%, rgba(73, 112, 255, 0.22), transparent 28%),
    radial-gradient(circle at 82% 12%, rgba(123, 97, 255, 0.18), transparent 24%),
    radial-gradient(circle at 50% 82%, rgba(74, 114, 184, 0.14), transparent 26%),
    var(--bg);
}

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

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

.page-shell {
  position: relative;
  isolation: isolate;
}

.bg-orb {
  position: fixed;
  border-radius: 999px;
  filter: blur(42px);
  opacity: 0.56;
  pointer-events: none;
  z-index: -3;
  will-change: transform;
}

.orb-a {
  top: 10vh;
  left: 6vw;
  width: 24rem;
  height: 24rem;
  background: radial-gradient(circle, rgba(84, 146, 255, 0.42), transparent 65%);
}

.orb-b {
  top: 34vh;
  right: -6vw;
  width: 28rem;
  height: 28rem;
  background: radial-gradient(circle, rgba(123, 97, 255, 0.38), transparent 65%);
}

.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 120px 120px;
  mask-image: radial-gradient(circle at center, black 40%, transparent 90%);
  opacity: 0.35;
  pointer-events: none;
  z-index: -4;
}

.site-header,
.section,
.site-footer {
  width: min(calc(100% - 32px), var(--max-width));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 22px;
  margin-top: 18px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  background: rgba(7, 10, 18, 0.58);
  backdrop-filter: blur(18px);
  z-index: 20;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 16px;
  height: 16px;
  border-radius: 999px;
  background:
    radial-gradient(circle at 35% 35%, #ffffff 0 12%, #98b8ff 13% 40%, #7b61ff 41% 100%);
  box-shadow: 0 0 24px rgba(152, 184, 255, 0.5);
}

.brand-copy {
  display: grid;
  gap: 2px;
}

.brand-copy strong {
  font-size: 1rem;
  letter-spacing: 0.08em;
}

.brand-copy small,
.site-nav a,
.hero-meta,
.section-heading p,
.feature-card p,
.trust-card p,
.stat-card span,
.cta-box p,
.footer-copy,
.footer-links a,
.compliance-tips,
.faq-answer p {
  color: var(--muted);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.95rem;
}

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

.section {
  padding: 110px 0;
}

.hero {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: 48px;
  min-height: calc(100vh - 120px);
  padding-top: 72px;
}

.eyebrow {
  margin: 0 0 16px;
  color: #b7c8ff;
  font-size: 0.78rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
}

.hero h1,
.section-heading h2,
.split-copy h2,
.cta-box h2 {
  margin: 0;
  font-family: "Noto Serif TC", serif;
  font-weight: 700;
  letter-spacing: 0.03em;
  line-height: 1.1;
}

.hero h1 {
  font-size: clamp(2.8rem, 7vw, 5.8rem);
}

.hero-lead,
.section-heading,
.split-copy > p,
.cta-box p {
  font-size: 1.05rem;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 172px;
  padding: 15px 22px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text);
  font: inherit;
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    box-shadow 180ms ease,
    background 180ms ease;
}

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

.button-primary {
  background: linear-gradient(135deg, rgba(146, 184, 255, 0.26), rgba(123, 97, 255, 0.34));
  box-shadow: 0 16px 40px rgba(77, 96, 173, 0.32);
}

.button-primary:hover {
  border-color: rgba(255, 255, 255, 0.28);
  box-shadow: 0 18px 46px rgba(98, 130, 255, 0.38);
}

.button-secondary {
  background: rgba(255, 255, 255, 0.03);
}

.button-secondary:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.2);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 22px;
  list-style: none;
  padding: 0;
  margin: 26px 0 0;
  font-size: 0.94rem;
}

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

.phone-stage {
  position: relative;
  width: min(100%, 430px);
  aspect-ratio: 1 / 1;
  display: grid;
  place-items: center;
}

.signal-ring {
  position: absolute;
  inset: auto;
  border-radius: 999px;
  border: 1px solid rgba(152, 184, 255, 0.22);
}

.ring-1 {
  width: 82%;
  height: 82%;
}

.ring-2 {
  width: 62%;
  height: 62%;
  border-color: rgba(123, 97, 255, 0.26);
}

.phone-mockup {
  position: relative;
  width: min(100%, 295px);
  height: min(100%, 605px);
  padding: 18px 16px 20px;
  border-radius: 42px;
  background: linear-gradient(180deg, rgba(20, 24, 38, 0.96), rgba(10, 12, 20, 0.96));
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow);
}

.phone-notch {
  width: 38%;
  height: 20px;
  margin: 0 auto 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
}

.phone-screen {
  height: calc(100% - 34px);
  overflow: hidden;
  border-radius: 28px;
  background: #0d1220;
}

.phone-image {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.section-heading {
  max-width: 760px;
  margin: 0 auto 40px;
  text-align: center;
}

.feature-grid,
.trust-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.feature-card,
.trust-card,
.stat-card,
.faq-item,
.cta-box {
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: var(--panel);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.feature-card,
.trust-card {
  min-height: 220px;
  padding: 28px;
  border-radius: 24px;
}

.feature-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  margin-bottom: 22px;
  border-radius: 999px;
  background: rgba(152, 184, 255, 0.12);
  color: var(--accent);
  font-weight: 700;
}

.feature-card h3,
.trust-card h3,
.faq-question span:first-child {
  font-size: 1.28rem;
  font-weight: 600;
}

.feature-card p,
.trust-card p {
  margin: 12px 0 0;
  line-height: 1.75;
}

.split-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 460px);
  align-items: center;
  gap: 34px;
}

.stat-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 30px;
}

.stat-card {
  padding: 24px;
  border-radius: 22px;
}

.stat-card strong {
  display: block;
  margin-bottom: 8px;
  font-size: 1.1rem;
}

.constellation-panel {
  position: relative;
  min-height: 380px;
  border-radius: 32px;
  background:
    radial-gradient(circle at 50% 30%, rgba(152, 184, 255, 0.16), transparent 34%),
    linear-gradient(180deg, rgba(16, 20, 34, 0.94), rgba(9, 12, 22, 0.94));
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.constellation-node,
.constellation-line {
  position: absolute;
  background: rgba(152, 184, 255, 0.72);
}

.constellation-node {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  box-shadow: 0 0 24px rgba(152, 184, 255, 0.7);
}

.node-a {
  top: 28%;
  left: 26%;
}

.node-b {
  top: 42%;
  right: 24%;
}

.node-c {
  bottom: 24%;
  left: 50%;
}

.constellation-line {
  height: 2px;
  transform-origin: left center;
  opacity: 0.7;
}

.line-a {
  top: 31.5%;
  left: 28%;
  width: 44%;
  transform: rotate(14deg);
}

.line-b {
  top: 54%;
  left: 40%;
  width: 25%;
  transform: rotate(86deg);
}

.constellation-content {
  position: absolute;
  inset: auto 36px 36px;
}

.constellation-content p {
  margin: 0 0 8px;
  color: var(--accent);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: 0.82rem;
}

.constellation-content h3 {
  margin: 0;
  font-family: "Noto Serif TC", serif;
  font-size: clamp(1.8rem, 4vw, 2.7rem);
  line-height: 1.22;
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.faq-item {
  border-radius: 28px;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 26px 28px;
  border: 0;
  background: transparent;
  color: var(--text);
  text-align: left;
  font: inherit;
  cursor: pointer;
}

.faq-plus {
  position: relative;
  flex: 0 0 16px;
  width: 16px;
  height: 16px;
}

.faq-plus::before,
.faq-plus::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 16px;
  height: 2px;
  border-radius: 999px;
  background: var(--accent);
  transform: translate(-50%, -50%);
  transition: transform 180ms ease, opacity 180ms ease;
}

.faq-plus::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.faq-item.is-open .faq-plus::after {
  opacity: 0;
  transform: translate(-50%, -50%) rotate(180deg);
}

.faq-answer {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 220ms ease;
}

.faq-answer p {
  min-height: 0;
  margin: 0;
  padding: 0 28px 0;
  line-height: 1.75;
  overflow: hidden;
}

.faq-item.is-open .faq-answer {
  grid-template-rows: 1fr;
}

.faq-item.is-open .faq-answer p {
  padding-bottom: 28px;
}

.cta-section {
  padding-top: 96px;
}

.cta-box {
  padding: 42px;
  border-radius: 30px;
  text-align: center;
  background:
    radial-gradient(circle at top, rgba(123, 97, 255, 0.18), transparent 40%),
    var(--panel-strong);
}

.cta-box .hero-actions {
  justify-content: center;
}

.site-footer {
  padding: 0 0 52px;
}

.footer-inner {
  padding: 32px;
  border-radius: 24px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(7, 10, 18, 0.58);
  backdrop-filter: blur(18px);
}

.footer-copy,
.compliance-tips {
  margin: 0;
  line-height: 1.75;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 22px;
  margin: 18px 0;
}

.compliance-tips {
  font-size: 0.94rem;
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity 520ms ease,
    transform 520ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 980px) {
  .site-header {
    flex-direction: column;
    align-items: stretch;
  }

  .site-nav {
    width: 100%;
    flex-wrap: wrap;
    justify-content: flex-start;
    gap: 14px 18px;
  }

  .hero,
  .split-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 56px;
  }

  .feature-grid,
  .trust-grid,
  .faq-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .section {
    padding: 84px 0;
  }

  .site-header,
  .footer-inner,
  .feature-card,
  .trust-card,
  .stat-card,
  .cta-box {
    padding-left: 20px;
    padding-right: 20px;
  }

  .hero h1 {
    font-size: clamp(2.4rem, 13vw, 4rem);
  }

  .hero-actions,
  .footer-links {
    gap: 12px;
  }

  .site-nav {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    font-size: 0.9rem;
  }

  .site-nav a {
    display: block;
  }

  .button {
    width: 100%;
  }

  .faq-question {
    padding: 22px 20px;
  }

  .faq-answer p {
    padding-left: 20px;
    padding-right: 20px;
  }

  .faq-item.is-open .faq-answer p {
    padding-bottom: 22px;
  }

  .stat-row {
    grid-template-columns: 1fr;
  }

  .constellation-panel {
    min-height: 320px;
  }
}