:root {
  color-scheme: dark;
  --bg: #050607;
  --bg-soft: #0b0d12;
  --surface: rgba(255, 255, 255, 0.07);
  --surface-strong: rgba(255, 255, 255, 0.12);
  --line: rgba(255, 255, 255, 0.13);
  --line-strong: rgba(255, 255, 255, 0.28);
  --text: #f6f7fb;
  --muted: rgba(246, 247, 251, 0.62);
  --soft: rgba(246, 247, 251, 0.42);
  --cyan: #72efff;
  --teal: #69f4d3;
  --violet: #8b6cff;
  --blue: #81a8ff;
  --danger: #ff7d73;
  --radius-xl: 42px;
  --radius-lg: 30px;
  --radius-md: 22px;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.42);
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  min-height: 100dvh;
  overflow-x: hidden;
  color: var(--text);
  font-family: "SF Pro Display", "SF Pro Text", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 16% 8%, rgba(114, 239, 255, 0.14), transparent 27rem),
    radial-gradient(circle at 86% 6%, rgba(139, 108, 255, 0.13), transparent 30rem),
    radial-gradient(circle at 72% 68%, rgba(105, 244, 211, 0.12), transparent 26rem),
    var(--bg);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background-image: radial-gradient(rgba(255, 255, 255, 0.22) 1px, transparent 1px);
  background-size: 14px 14px;
  opacity: 0.32;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(5, 6, 7, 0.9), transparent 18%, transparent 82%, rgba(5, 6, 7, 0.88)),
    linear-gradient(180deg, rgba(5, 6, 7, 0.18), rgba(5, 6, 7, 0.9));
}

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

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

button,
input,
textarea {
  font: inherit;
}

.zh {
  display: none !important;
}

html[data-lang="zh"] .en {
  display: none !important;
}

html[data-lang="zh"] .zh {
  display: revert !important;
}

.page-shell {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  background: rgba(5, 6, 7, 0.72);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.nav {
  width: min(1180px, calc(100% - 40px));
  height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand-link,
.nav-links,
.lang-toggle,
.pill-button,
.ghost-button,
.mini-pill {
  border-radius: 999px;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: max-content;
  font-weight: 760;
  letter-spacing: -0.03em;
}

.brand-link img {
  width: 34px;
  height: 34px;
  border-radius: 11px;
  box-shadow: 0 0 26px rgba(105, 244, 211, 0.2);
}

.nav-cluster {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid var(--line);
}

.nav-links a {
  padding: 10px 13px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 650;
  line-height: 1;
  transition: color 180ms ease, background 180ms ease;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  outline: none;
}

.lang-toggle {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 5px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--line);
}

.lang-toggle button {
  min-width: 42px;
  min-height: 36px;
  padding: 0 12px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 760;
  border: 0;
  border-radius: 999px;
  background: transparent;
  cursor: pointer;
}

.lang-toggle button[aria-pressed="true"] {
  color: #06100f;
  background: linear-gradient(135deg, var(--teal), var(--cyan));
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(360px, 0.78fr);
  align-items: center;
  gap: 34px;
  min-height: calc(100dvh - 72px);
  padding: 44px 0 68px;
}

.brand-hero {
  grid-template-columns: minmax(0, 0.88fr) minmax(360px, 0.72fr);
}

.hero-copy {
  position: relative;
  z-index: 1;
}

.kicker,
.section-kicker {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 15px;
  font-weight: 760;
}

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

h1 {
  max-width: 860px;
  margin-bottom: 22px;
  font-size: clamp(58px, 8vw, 118px);
  line-height: 0.88;
  letter-spacing: -0.075em;
  font-weight: 790;
}

.brand-hero h1 {
  font-size: clamp(54px, 7vw, 104px);
}

.hero-copy p {
  max-width: 560px;
  margin-bottom: 28px;
  color: rgba(246, 247, 251, 0.72);
  font-size: clamp(18px, 2vw, 24px);
  line-height: 1.34;
  font-weight: 620;
  letter-spacing: -0.025em;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.pill-button,
.ghost-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 22px;
  font-size: 15px;
  font-weight: 790;
  white-space: nowrap;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.pill-button {
  color: #06100f;
  background: linear-gradient(135deg, var(--teal), var(--cyan) 45%, var(--blue));
  box-shadow: 0 18px 46px rgba(105, 244, 211, 0.22);
}

.ghost-button {
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--line);
}

.pill-button:hover,
.ghost-button:hover,
.pill-button:focus-visible,
.ghost-button:focus-visible {
  transform: translateY(-2px);
  outline: none;
}

.pill-button:active,
.ghost-button:active {
  transform: translateY(0) scale(0.98);
}

.glass-panel {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-xl);
  border: 1px solid var(--line);
  background:
    linear-gradient(155deg, rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0.05) 32%, rgba(255, 255, 255, 0.02)),
    rgba(255, 255, 255, 0.06);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.22),
    inset 0 -28px 54px rgba(255, 255, 255, 0.03),
    var(--shadow);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.glass-panel::before {
  content: "";
  position: absolute;
  inset: -24%;
  pointer-events: none;
  background:
    radial-gradient(circle at 25% 15%, rgba(255, 255, 255, 0.18), transparent 16rem),
    radial-gradient(circle at 80% 65%, rgba(105, 244, 211, 0.16), transparent 18rem),
    radial-gradient(circle at 76% 18%, rgba(129, 168, 255, 0.13), transparent 17rem);
  opacity: 0.9;
}

.glass-panel > * {
  position: relative;
  z-index: 1;
}

.hero-device {
  padding: 18px;
  transform: rotate(2deg);
}

.hero-device img {
  width: min(380px, 100%);
  margin: 0 auto;
  border-radius: 30px;
  box-shadow: 0 26px 80px rgba(0, 0, 0, 0.46);
}

.product-card {
  min-height: 460px;
  padding: 30px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.product-card img {
  width: 76px;
  height: 76px;
  border-radius: 22px;
  box-shadow: 0 0 40px rgba(105, 244, 211, 0.24);
}

.product-card h2 {
  margin: 26px 0 12px;
  font-size: clamp(38px, 5vw, 66px);
  line-height: 0.96;
  letter-spacing: -0.06em;
}

.product-card p {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.42;
  font-weight: 620;
}

.mini-pill {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 13px;
  color: rgba(246, 247, 251, 0.72);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--line);
  font-size: 13px;
  font-weight: 760;
}

.section {
  padding: 76px 0;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 30px;
}

.section-heading h2 {
  margin-bottom: 14px;
  font-size: clamp(36px, 5.2vw, 72px);
  line-height: 0.95;
  letter-spacing: -0.065em;
}

.section-heading p {
  max-width: 620px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.46;
  font-weight: 610;
}

.bento {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 18px;
}

.bento-card {
  position: relative;
  overflow: hidden;
  min-height: 280px;
  padding: 26px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.055);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.12);
}

.bento-card h3 {
  max-width: 420px;
  margin-bottom: 10px;
  font-size: clamp(26px, 3vw, 40px);
  line-height: 1;
  letter-spacing: -0.05em;
}

.bento-card p {
  max-width: 480px;
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.48;
  font-weight: 590;
}

.bento-card.wide {
  grid-column: span 2;
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  align-items: center;
  gap: 20px;
  min-height: 420px;
}

.bento-media {
  border-radius: 28px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.11);
  background: rgba(0, 0, 0, 0.26);
}

.bento-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.portrait-media {
  max-height: 520px;
  object-fit: cover;
  object-position: top center;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.stat-card {
  min-height: 160px;
  padding: 22px;
  border-radius: 28px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.06);
}

.stat-card strong {
  display: block;
  margin-bottom: 10px;
  font-size: clamp(34px, 4vw, 54px);
  line-height: 1;
  letter-spacing: -0.05em;
}

.stat-card span {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.35;
  font-weight: 650;
}

.steps {
  display: grid;
  grid-template-columns: 0.78fr 1.22fr;
  gap: 18px;
  align-items: stretch;
}

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

.step-item {
  padding: 22px;
  border-radius: 28px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.06);
}

.step-item h3 {
  margin-bottom: 8px;
  font-size: 24px;
  letter-spacing: -0.04em;
}

.step-item p {
  margin: 0;
  color: var(--muted);
  line-height: 1.45;
  font-weight: 590;
}

.feature-shot {
  padding: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-shot img {
  max-height: 720px;
  border-radius: 32px;
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.44);
}

.legal-layout {
  display: grid;
  grid-template-columns: minmax(220px, 0.35fr) minmax(0, 1fr);
  gap: 24px;
  padding: 54px 0 84px;
}

.legal-sidebar {
  align-self: start;
  position: sticky;
  top: 96px;
  padding: 24px;
}

.legal-sidebar h1 {
  margin-bottom: 18px;
  font-size: clamp(38px, 5vw, 70px);
}

.legal-sidebar p {
  color: var(--muted);
  line-height: 1.45;
  font-weight: 610;
}

.legal-content {
  padding: 36px;
}

.legal-content section + section {
  margin-top: 34px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.legal-content h2 {
  margin-bottom: 12px;
  font-size: 28px;
  line-height: 1;
  letter-spacing: -0.04em;
}

.legal-content p,
.legal-content li {
  color: rgba(246, 247, 251, 0.72);
  font-size: 16px;
  line-height: 1.62;
  font-weight: 520;
}

.legal-content ul {
  margin: 12px 0 0;
  padding-left: 20px;
}

.support-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 18px;
  padding-bottom: 84px;
}

.support-card {
  padding: 28px;
}

.support-card h2 {
  margin-bottom: 12px;
  font-size: clamp(30px, 4vw, 54px);
  line-height: 1;
  letter-spacing: -0.055em;
}

.support-card p {
  color: var(--muted);
  line-height: 1.5;
  font-weight: 600;
}

.faq-list {
  display: grid;
  gap: 14px;
}

.faq-item {
  padding: 24px;
  border-radius: 28px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.055);
}

.faq-item h3 {
  margin-bottom: 9px;
  font-size: 22px;
  letter-spacing: -0.035em;
}

.faq-item p {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
  font-weight: 590;
}

.site-footer {
  padding: 36px 0 46px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-inner {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  color: var(--soft);
  font-size: 14px;
  font-weight: 620;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

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

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

@media (prefers-reduced-motion: no-preference) {
  .glass-panel,
  .bento-card,
  .stat-card,
  .step-item,
  .faq-item {
    transition: transform 220ms ease, border-color 220ms ease, background 220ms ease;
  }

  .glass-panel:hover,
  .bento-card:hover,
  .stat-card:hover,
  .step-item:hover,
  .faq-item:hover {
    transform: translateY(-2px);
    border-color: rgba(114, 239, 255, 0.26);
  }
}

@media (max-width: 960px) {
  .page-shell,
  .nav,
  .footer-inner {
    width: min(100% - 28px, 760px);
  }

  .hero,
  .brand-hero,
  .steps,
  .support-grid,
  .legal-layout {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 34px;
  }

  .hero-device {
    transform: none;
  }

  .bento,
  .bento-card.wide,
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .bento-card.wide {
    grid-column: span 1;
  }

  .legal-sidebar {
    position: static;
  }
}

@media (max-width: 720px) {
  .site-header {
    position: static;
  }

  .nav {
    height: auto;
    padding: 14px 0;
    align-items: flex-start;
  }

  .nav-cluster {
    flex-direction: column-reverse;
    align-items: flex-end;
  }

  .nav-links {
    display: none;
  }

  h1,
  .brand-hero h1 {
    font-size: clamp(48px, 16vw, 72px);
  }

  .hero-copy p {
    font-size: 18px;
  }

  .glass-panel {
    border-radius: 32px;
  }

  .product-card,
  .legal-content,
  .support-card {
    padding: 24px;
  }

  .section {
    padding: 54px 0;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .page-shell,
  .nav,
  .footer-inner {
    width: calc(100% - 22px);
  }

  .brand-link span {
    font-size: 17px;
  }

  .hero {
    padding-bottom: 44px;
  }

  .cta-row,
  .pill-button,
  .ghost-button {
    width: 100%;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }
}