:root {
  color-scheme: light;
  --background: #fbfbfc;
  --surface: rgba(255, 255, 255, 0.88);
  --surface-strong: #ffffff;
  --surface-muted: #f3f4f6;
  --text: #17191e;
  --text-secondary: #6f7580;
  --text-tertiary: #949aa5;
  --border: #dfe2e7;
  --border-soft: #eaecf0;
  --accent: #447ee8;
  --accent-strong: #2866d7;
  --accent-soft: #edf3ff;
  --purple: #b86dc9;
  --success: #237a55;
  --shadow: 0 24px 70px rgba(38, 45, 59, 0.12);
  --shadow-soft: 0 14px 42px rgba(38, 45, 59, 0.08);
  --radius-large: 24px;
  --radius-medium: 16px;
  --radius-small: 12px;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC",
    "Helvetica Neue", Arial, sans-serif;
  font-synthesis: none;
  line-height: 1.6;
  background: var(--background);
  color: var(--text);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  background-color: var(--background);
  background-image: radial-gradient(#d9dce2 0.75px, transparent 0.75px);
  background-size: 20px 20px;
}

body::before {
  position: fixed;
  z-index: -1;
  inset: 0;
  background:
    radial-gradient(circle at 50% 6%, rgba(115, 156, 241, 0.15), transparent 27rem),
    linear-gradient(rgba(251, 251, 252, 0.2), rgba(251, 251, 252, 0.88) 42rem);
  content: "";
  pointer-events: none;
}

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

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

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

:focus-visible {
  outline: 3px solid rgba(68, 126, 232, 0.32);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 8px 12px;
  border-radius: 8px;
  background: var(--text);
  color: #fff;
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  border-bottom: 1px solid rgba(223, 226, 231, 0.78);
  background: rgba(251, 251, 252, 0.78);
  backdrop-filter: blur(18px) saturate(140%);
}

.header-inner,
.site-footer,
.container {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.header-inner {
  display: flex;
  min-height: 68px;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 750;
  letter-spacing: -0.035em;
}

.brand img {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  box-shadow: 0 5px 14px rgba(48, 108, 214, 0.22);
}

.header-actions,
.nav-links,
.language-switch {
  display: flex;
  align-items: center;
}

.header-actions {
  gap: 22px;
}

.nav-links {
  gap: 24px;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 14px;
  transition: color 150ms ease;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--text);
}

.language-switch {
  gap: 3px;
  padding: 3px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
}

.language-switch button {
  min-width: 34px;
  padding: 5px 8px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--text-tertiary);
  cursor: pointer;
  font: inherit;
  font-size: 12px;
}

.language-switch button[aria-pressed="true"] {
  background: var(--text);
  color: #fff;
}

.menu-toggle {
  display: none;
  width: 38px;
  height: 38px;
  padding: 9px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  height: 1.5px;
  margin: 4px 0;
  border-radius: 1px;
  background: var(--text);
}

[data-lang="en"] {
  display: none;
}

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

html[data-language="en"] [data-lang="en"] {
  display: revert;
}

.hero {
  padding: 112px 0 72px;
  text-align: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 24px;
  padding: 7px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.68);
  color: var(--text-secondary);
  font-size: 13px;
}

.eyebrow-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(68, 126, 232, 0.12);
}

.hero h1,
.page-hero h1 {
  margin: 0;
  font-size: clamp(44px, 7vw, 78px);
  font-weight: 760;
  letter-spacing: -0.065em;
  line-height: 1.03;
}

.gradient-text {
  background: linear-gradient(90deg, var(--accent), var(--purple));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-copy {
  max-width: 670px;
  margin: 26px auto 0;
  color: var(--text-secondary);
  font-size: clamp(17px, 2vw, 20px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface-strong);
  font-size: 14px;
  font-weight: 650;
  transition: transform 150ms ease, box-shadow 150ms ease, background 150ms ease;
}

.button:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-soft);
}

.button-primary {
  border-color: var(--text);
  background: var(--text);
  color: #fff;
}

.button-note {
  display: block;
  margin-top: 10px;
  color: var(--text-tertiary);
  font-size: 12px;
}

.brand-stage {
  position: relative;
  display: grid;
  max-width: 920px;
  min-height: 360px;
  margin: 0 auto 116px;
  place-items: center;
  overflow: hidden;
  padding: 64px 24px;
  border: 1px solid rgba(215, 219, 226, 0.9);
  border-radius: 28px;
  background:
    radial-gradient(circle at 50% 42%, rgba(97, 144, 239, 0.18), transparent 16rem),
    rgba(255, 255, 255, 0.72);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.brand-stage::before {
  position: absolute;
  z-index: -1;
  inset: -60px 16%;
  border-radius: 50%;
  background: rgba(86, 132, 230, 0.16);
  filter: blur(60px);
  content: "";
}

.brand-stage-content {
  position: relative;
  z-index: 1;
  text-align: center;
}

.brand-stage img {
  width: 128px;
  height: 128px;
  margin: 0 auto 24px;
  border-radius: 29px;
  box-shadow: 0 22px 45px rgba(45, 108, 222, 0.28);
}

.brand-stage h2 {
  margin: 0;
  font-size: clamp(28px, 4vw, 40px);
  letter-spacing: -0.045em;
}

.brand-stage p {
  margin: 10px 0 0;
  color: var(--text-secondary);
}

.section {
  padding: 88px 0;
}

.section-muted {
  border-block: 1px solid rgba(223, 226, 231, 0.78);
  background: rgba(247, 248, 250, 0.78);
}

.section-showcase {
  padding-top: 0;
}

.section-heading {
  max-width: 680px;
  margin-bottom: 42px;
}

.section-label {
  margin: 0 0 10px;
  color: var(--accent-strong);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.section-heading h2,
.cta h2,
.page-hero h1 {
  margin: 0;
  font-size: clamp(34px, 5vw, 52px);
  letter-spacing: -0.05em;
  line-height: 1.08;
}

.section-heading p,
.cta p,
.page-hero p {
  margin: 16px 0 0;
  color: var(--text-secondary);
  font-size: 17px;
}

.feature-grid,
.steps,
.support-grid,
.plan-grid {
  display: grid;
  gap: 18px;
}

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

.showcase-grid,
.media-layout {
  display: grid;
  gap: 18px;
}

.showcase-grid {
  grid-template-columns: 1.35fr 0.8fr 0.8fr;
  align-items: stretch;
}

.showcase-shot,
.video-shell {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: var(--shadow-soft);
}

.showcase-shot {
  margin: 0;
  min-height: 240px;
}

.showcase-shot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
}

.showcase-shot-primary {
  min-height: 520px;
}

.media-layout {
  grid-template-columns: 0.9fr 1.1fr;
  align-items: center;
  gap: 28px;
}

.media-notes {
  margin: 0;
  padding: 0;
  list-style: none;
}

.media-notes li {
  padding: 14px 0;
  border-bottom: 1px solid rgba(216, 221, 231, 0.8);
  color: var(--text-secondary);
}

.media-notes li:last-child {
  border-bottom: 0;
}

.video-shell {
  padding: 14px;
}

.product-video {
  display: block;
  width: 100%;
  border-radius: 16px;
  background: #0d1118;
}

.feature-card,
.step,
.support-card,
.plan-card,
.legal-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-medium);
  background: var(--surface);
  box-shadow: 0 10px 30px rgba(38, 45, 59, 0.045);
}

.feature-card {
  min-height: 210px;
  padding: 28px;
}

.feature-number {
  display: inline-grid;
  width: 34px;
  height: 34px;
  place-items: center;
  margin-bottom: 28px;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 12px;
  font-weight: 750;
}

.feature-card h3,
.step h3,
.support-card h2,
.plan-card h3 {
  margin: 0 0 8px;
  font-size: 19px;
  letter-spacing: -0.025em;
}

.feature-card p,
.step p,
.support-card p,
.plan-card p {
  margin: 0;
  color: var(--text-secondary);
}

.steps {
  grid-template-columns: repeat(3, 1fr);
  counter-reset: step;
}

.step {
  position: relative;
  padding: 28px;
  counter-increment: step;
}

.step::before {
  display: block;
  margin-bottom: 38px;
  color: var(--text-tertiary);
  content: "0" counter(step);
  font-size: 13px;
  font-weight: 700;
}

.plan-grid {
  grid-template-columns: repeat(2, 1fr);
  max-width: 820px;
}

.plan-card {
  padding: 30px;
}

.plan-card-featured {
  border-color: rgba(68, 126, 232, 0.38);
  background: linear-gradient(145deg, #fff, #f5f8ff);
}

.plan-kicker {
  color: var(--text-tertiary);
  font-size: 13px;
}

.plan-card ul {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.plan-card li {
  margin-top: 10px;
  color: var(--text-secondary);
}

.plan-card li::before {
  margin-right: 9px;
  color: var(--success);
  content: "✓";
  font-weight: 800;
}

.privacy-banner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
  padding: 44px;
  border: 1px solid var(--border);
  border-radius: var(--radius-large);
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.95), rgba(239, 244, 255, 0.92));
  box-shadow: var(--shadow-soft);
}

.privacy-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.privacy-list li {
  padding: 13px 0;
  border-bottom: 1px solid rgba(216, 221, 231, 0.8);
  color: var(--text-secondary);
}

.privacy-list li:last-child {
  border-bottom: 0;
}

.cta {
  margin: 94px auto;
  padding: 60px 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius-large);
  background: rgba(255, 255, 255, 0.86);
  box-shadow: var(--shadow-soft);
  text-align: center;
}

.page-hero {
  max-width: 760px;
  padding: 104px 0 56px;
}

.page-hero h1 {
  font-size: clamp(42px, 6vw, 64px);
}

.support-grid {
  grid-template-columns: repeat(2, 1fr);
  padding-bottom: 90px;
}

.support-card {
  padding: 28px;
}

.support-card-wide {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 34px;
}

.support-card a:not(.button),
.legal-content a {
  color: var(--accent-strong);
  text-decoration: underline;
  text-decoration-color: rgba(40, 102, 215, 0.28);
  text-underline-offset: 3px;
}

.legal-layout {
  display: grid;
  grid-template-columns: 210px minmax(0, 720px);
  gap: 64px;
  align-items: start;
  padding-bottom: 100px;
}

.legal-nav {
  position: sticky;
  top: 96px;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius-small);
  background: rgba(255, 255, 255, 0.8);
}

.legal-nav a {
  display: block;
  padding: 7px 8px;
  color: var(--text-secondary);
  font-size: 13px;
}

.legal-content {
  padding: 36px 42px;
  border: 1px solid var(--border);
  border-radius: var(--radius-medium);
  background: rgba(255, 255, 255, 0.92);
}

.legal-content h2 {
  margin: 44px 0 12px;
  font-size: 22px;
  letter-spacing: -0.025em;
}

.legal-content h2:first-of-type {
  margin-top: 10px;
}

.legal-content p,
.legal-content li {
  color: #565c66;
}

.legal-content .meta {
  color: var(--text-tertiary);
  font-size: 14px;
}

.site-footer {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 30px;
  padding: 34px 0 44px;
  border-top: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 13px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 18px;
}

@media (max-width: 800px) {
  .menu-toggle {
    display: block;
  }

  .header-actions {
    gap: 10px;
  }

  .nav-links {
    position: absolute;
    top: 68px;
    right: 20px;
    left: 20px;
    display: none;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-small);
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-soft);
  }

  .nav-links[data-open="true"] {
    display: grid;
  }

  .nav-links a {
    padding: 10px 12px;
  }

  .hero {
    padding-top: 82px;
  }

  .feature-grid,
  .showcase-grid,
  .steps,
  .support-grid,
  .plan-grid,
  .media-layout,
  .privacy-banner,
  .legal-layout {
    grid-template-columns: 1fr;
  }

  .showcase-shot,
  .showcase-shot-primary {
    min-height: auto;
  }

  .brand-stage {
    margin-bottom: 70px;
    min-height: 300px;
    padding: 48px 20px;
    border-radius: 18px;
  }

  .section {
    padding: 68px 0;
  }

  .legal-nav {
    position: static;
    display: flex;
    overflow-x: auto;
  }

  .legal-nav a {
    white-space: nowrap;
  }
}

@media (max-width: 560px) {
  .header-inner,
  .site-footer,
  .container {
    width: min(100% - 28px, 1120px);
  }

  .brand span {
    display: none;
  }

  .hero h1 {
    font-size: 46px;
  }

  .hero-copy {
    font-size: 17px;
  }

  .support-card-wide,
  .site-footer {
    align-items: stretch;
    flex-direction: column;
  }

  .footer-links {
    justify-content: flex-start;
  }

  .legal-content,
  .privacy-banner,
  .video-shell {
    padding: 26px 22px;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}