:root {
  --page: #07111f;
  --page-deep: #040a13;
  --surface: rgba(15, 31, 52, 0.86);
  --surface-solid: #0f1f34;
  --surface-light: rgba(31, 56, 87, 0.44);
  --text: #f5f8fc;
  --muted: #b7c4d6;
  --line: rgba(154, 194, 234, 0.2);
  --electric: #54b9ff;
  --electric-soft: #a9dcff;
  --gold: #f3c969;
  --success: #9ee6c1;
  --max-width: 1080px;
  color-scheme: dark;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--page-deep);
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 88% 5%, rgba(84, 185, 255, 0.14), transparent 30rem),
    radial-gradient(circle at 10% 46%, rgba(243, 201, 105, 0.08), transparent 26rem),
    linear-gradient(180deg, #0a1729 0%, var(--page) 36%, var(--page-deep) 100%);
  font-size: 16px;
  line-height: 1.65;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  opacity: 0.32;
  background-image:
    linear-gradient(rgba(105, 169, 229, 0.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(105, 169, 229, 0.09) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.88), transparent 73%);
}

a {
  color: inherit;
}

a:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--electric-soft);
  outline-offset: 4px;
}

.site-header {
  width: min(calc(100% - 40px), var(--max-width));
  margin: 0 auto;
  padding: max(20px, env(safe-area-inset-top)) 0 18px;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-size: 14px;
  font-weight: 760;
  line-height: 1.2;
  text-decoration: none;
}

.wordmark-mark,
.hero-emblem {
  position: relative;
  display: grid;
  place-items: center;
  overflow: hidden;
  border: 1px solid rgba(169, 220, 255, 0.42);
  background: linear-gradient(145deg, rgba(84, 185, 255, 0.22), rgba(243, 201, 105, 0.14));
  box-shadow: 0 0 30px rgba(84, 185, 255, 0.14);
}

.wordmark-mark {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  color: var(--gold);
  font-size: 19px;
}

.wordmark-app-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  box-shadow: 0 0 18px rgba(243, 201, 105, 0.25);
  object-fit: cover;
}

.wordmark-mark::after,
.hero-emblem::after {
  position: absolute;
  width: 145%;
  height: 1px;
  content: "";
  background: rgba(225, 243, 255, 0.42);
  transform: rotate(-38deg);
}

.nav-link {
  color: var(--muted);
  font-size: 14px;
  font-weight: 650;
  text-decoration: none;
}

.nav-link:hover {
  color: var(--electric-soft);
}

.hero {
  width: min(calc(100% - 40px), var(--max-width));
  margin: 0 auto;
  padding: 58px 0 52px;
}

.hero-grid {
  display: grid;
  align-items: center;
  gap: 34px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 14px;
  color: var(--electric-soft);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.eyebrow::before {
  width: 25px;
  height: 1px;
  content: "";
  background: var(--electric);
}

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

h1 {
  max-width: 700px;
  font-size: clamp(39px, 9vw, 70px);
  line-height: 1.06;
  letter-spacing: 0;
}

.hero-cn {
  margin-top: 13px;
  color: var(--gold);
  font-size: clamp(19px, 4vw, 25px);
  font-weight: 700;
}

.hero-copy {
  max-width: 610px;
  margin-top: 24px;
  color: var(--muted);
  font-size: 17px;
}

.hero-copy strong {
  display: block;
  margin-bottom: 6px;
  color: var(--text);
  font-weight: 650;
}

.hero-kicker {
  margin-top: 24px;
  color: var(--electric-soft);
  font-size: 15px;
  font-weight: 720;
}

.hero-emblem {
  width: min(100%, 292px);
  aspect-ratio: 1;
  margin: 0 auto;
  padding: 8px;
  border-radius: 24px;
}

.hero-emblem::before {
  position: absolute;
  inset: 15%;
  border: 1px solid rgba(243, 201, 105, 0.5);
  border-radius: 50%;
  content: "";
  box-shadow: 0 0 42px rgba(84, 185, 255, 0.2), inset 0 0 28px rgba(84, 185, 255, 0.12);
}

.hero-emblem::after {
  display: none;
}

.hero-app-icon {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  border-radius: 17px;
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.32);
  object-fit: cover;
}

.bolt {
  z-index: 1;
  color: var(--gold);
  font-size: 90px;
  line-height: 1;
  text-shadow: 0 0 28px rgba(243, 201, 105, 0.42);
}

.content-wrap {
  width: min(calc(100% - 40px), var(--max-width));
  margin: 0 auto;
  padding-bottom: 68px;
}

.section {
  padding: 42px 0;
  border-top: 1px solid var(--line);
}

.section-heading {
  max-width: 700px;
  margin-bottom: 25px;
}

.section-kicker {
  margin-bottom: 7px;
  color: var(--electric-soft);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

h2 {
  font-size: clamp(26px, 6vw, 38px);
  line-height: 1.18;
}

.section-heading p,
.body-copy {
  margin-top: 13px;
  color: var(--muted);
}

.section-heading .section-cn-title {
  margin-top: 7px;
  color: var(--gold);
  font-size: 16px;
  font-weight: 720;
}

.info-card,
.support-card,
.privacy-card,
.purchase-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(150deg, rgba(27, 51, 80, 0.72), rgba(10, 21, 37, 0.88));
  box-shadow: 0 14px 42px rgba(0, 0, 0, 0.14);
}

.info-card {
  padding: 4px 22px;
}

.info-row {
  display: grid;
  grid-template-columns: minmax(105px, 0.72fr) minmax(0, 1.28fr);
  gap: 12px;
  padding: 17px 0;
  border-bottom: 1px solid rgba(154, 194, 234, 0.12);
}

.info-row:last-child {
  border-bottom: 0;
}

.info-label {
  color: var(--muted);
  font-size: 14px;
}

.info-value {
  color: var(--text);
  font-size: 14px;
  font-weight: 680;
  overflow-wrap: anywhere;
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-item {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(12, 27, 47, 0.76);
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 19px 20px;
  color: var(--text);
  cursor: pointer;
  font-size: 16px;
  font-weight: 710;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  flex: 0 0 auto;
  color: var(--electric-soft);
  content: "+";
  font-size: 24px;
  font-weight: 400;
  line-height: 1;
}

.faq-item[open] summary {
  border-bottom: 1px solid var(--line);
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-answer {
  padding: 18px 20px 21px;
  color: var(--muted);
}

.faq-answer p + p {
  margin-top: 13px;
}

.faq-answer .cn,
.purchase-content .cn,
.privacy-content .cn {
  color: var(--text);
}

.purchase-card,
.privacy-card,
.support-card {
  padding: 24px;
}

.two-column {
  display: grid;
  gap: 25px;
}

.privacy-feature-grid {
  display: grid;
  gap: 14px;
}

.privacy-feature-card {
  position: relative;
  min-width: 0;
  padding: 22px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(84, 185, 255, 0.1), transparent 52%),
    rgba(12, 27, 47, 0.8);
}

.privacy-feature-card::after {
  position: absolute;
  top: 0;
  right: 0;
  width: 60px;
  height: 1px;
  content: "";
  background: var(--gold);
  opacity: 0.82;
}

.privacy-feature-icon {
  display: grid;
  width: 38px;
  height: 38px;
  margin-bottom: 19px;
  place-items: center;
  border: 1px solid rgba(84, 185, 255, 0.48);
  border-radius: 6px;
  color: var(--electric-soft);
  background: rgba(4, 14, 27, 0.5);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.privacy-feature-card h3 {
  overflow-wrap: anywhere;
}

.privacy-feature-cn {
  margin-top: 5px;
  color: var(--gold);
  font-size: 15px;
  font-weight: 700;
}

.privacy-feature-card > p:not(.privacy-feature-cn) {
  margin-top: 13px;
  color: var(--muted);
  font-size: 14px;
}

.privacy-feature-card > .cn {
  color: var(--text);
}

.privacy-policy-callout {
  margin-top: 20px;
  padding: 23px;
  border: 1px solid rgba(84, 185, 255, 0.3);
  border-radius: 8px;
  background: linear-gradient(105deg, rgba(84, 185, 255, 0.12), rgba(12, 27, 47, 0.78) 48%);
}

.privacy-policy-callout p {
  max-width: 710px;
  color: var(--muted);
}

.privacy-policy-callout .cn {
  margin-top: 8px;
  color: var(--text);
}

.privacy-policy-button {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 6px 10px;
  min-height: 46px;
  margin-top: 19px;
  padding: 10px 16px;
  border: 1px solid rgba(243, 201, 105, 0.68);
  border-radius: 6px;
  color: var(--text);
  background: rgba(243, 201, 105, 0.1);
  font-size: 14px;
  font-weight: 760;
  line-height: 1.35;
  text-align: center;
  text-decoration: none;
}

.privacy-policy-button span + span {
  padding-left: 10px;
  border-left: 1px solid rgba(243, 201, 105, 0.44);
  color: var(--gold);
}

.privacy-policy-button:hover {
  border-color: var(--gold);
  background: rgba(243, 201, 105, 0.18);
}

h3 {
  font-size: 19px;
  line-height: 1.35;
}

.purchase-content p,
.privacy-content p,
.support-card p {
  margin-top: 11px;
  color: var(--muted);
}

.steps {
  display: grid;
  gap: 11px;
  padding: 0;
  margin: 20px 0 0;
  list-style: none;
  counter-reset: steps;
}

.steps li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 11px;
  align-items: start;
  color: var(--muted);
}

.steps li::before {
  display: grid;
  width: 27px;
  height: 27px;
  place-items: center;
  border: 1px solid rgba(84, 185, 255, 0.46);
  border-radius: 50%;
  color: var(--electric-soft);
  content: counter(steps);
  counter-increment: steps;
  font-size: 13px;
  font-weight: 800;
}

.inline-link,
.support-email {
  color: var(--electric-soft);
  font-weight: 700;
  text-decoration-color: rgba(169, 220, 255, 0.5);
  text-underline-offset: 3px;
  overflow-wrap: anywhere;
}

.support-card {
  background:
    linear-gradient(118deg, rgba(84, 185, 255, 0.13), transparent 48%),
    linear-gradient(150deg, rgba(27, 51, 80, 0.82), rgba(10, 21, 37, 0.9));
}

.support-email-wrap {
  margin: 18px 0;
  padding: 17px;
  border: 1px solid rgba(84, 185, 255, 0.32);
  border-radius: 6px;
  background: rgba(5, 15, 29, 0.52);
}

.support-email-label {
  display: block;
  margin-bottom: 5px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.support-list {
  padding-left: 20px;
  margin: 17px 0 0;
  color: var(--muted);
}

.support-list li + li {
  margin-top: 7px;
}

.legal-notice {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: rgba(2, 8, 16, 0.56);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: min(calc(100% - 40px), var(--max-width));
  margin: 0 auto;
  padding: 25px 0 max(25px, env(safe-area-inset-bottom));
  color: var(--muted);
  font-size: 13px;
}

.footer-title {
  color: var(--text);
  font-size: 14px;
  font-weight: 720;
}

.footer-links {
  display: flex;
  gap: 16px;
}

.footer-links a {
  text-decoration: none;
}

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

.privacy-page .hero {
  padding-bottom: 36px;
}

.privacy-page h1 {
  font-size: clamp(35px, 8vw, 58px);
}

.privacy-content {
  display: grid;
  gap: 23px;
}

.privacy-block + .privacy-block {
  padding-top: 23px;
  border-top: 1px solid var(--line);
}

.privacy-block ul {
  padding-left: 20px;
  margin: 13px 0 0;
  color: var(--muted);
}

.privacy-block li + li {
  margin-top: 8px;
}

@media (min-width: 720px) {
  .site-header,
  .hero,
  .content-wrap,
  .footer-inner {
    width: min(calc(100% - 72px), var(--max-width));
  }

  .hero {
    padding: 82px 0 70px;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(230px, 0.65fr);
    gap: 60px;
  }

  .hero-emblem {
    width: min(100%, 300px);
    margin-right: 0;
  }

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

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

@media (min-width: 980px) {
  .privacy-feature-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 390px) {
  .site-header,
  .hero,
  .content-wrap,
  .footer-inner {
    width: min(calc(100% - 28px), var(--max-width));
  }

  .info-card,
  .purchase-card,
  .privacy-card,
  .support-card,
  .privacy-feature-card,
  .privacy-policy-callout {
    padding-left: 16px;
    padding-right: 16px;
  }

  .info-card {
    padding-top: 3px;
    padding-bottom: 3px;
  }

  .faq-item summary,
  .faq-answer {
    padding-left: 16px;
    padding-right: 16px;
  }

  .info-row {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .privacy-policy-button {
    width: 100%;
  }
}