:root {
  color-scheme: light;
  --canvas: #f5f5f7;
  --paper: #ffffff;
  --paper-soft: #fbfbfd;
  --ink: #1f2225;
  --ink-strong: #121416;
  --muted: #686d72;
  --quiet: #8b8f94;
  --line: #d7d9dd;
  --line-soft: #e8e9ed;
  --accent: #2f3a3f;
  --accent-hover: #20282c;
  --accent-soft: #eef2f3;
  --accent-wash: #f6f7f8;
  --danger: #b5472f;
  --radius-panel: 24px;
  --radius-card: 18px;
  --radius-button: 999px;
  --container: 1180px;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-feature-settings: "kern";
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--canvas);
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background: var(--canvas);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.82), rgba(245, 245, 247, 0.96) 38%, rgba(245, 245, 247, 1));
  opacity: 0.68;
}

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

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

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

.skip-link {
  position: fixed;
  left: 20px;
  top: 14px;
  z-index: 20;
  padding: 10px 14px;
  border-radius: var(--radius-button);
  background: var(--accent);
  color: var(--paper);
  font-size: 14px;
  transform: translateY(-160%);
  transition: transform 160ms ease;
}

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

.page-shell {
  min-height: 100vh;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10;
  height: 64px;
  padding: 0 max(24px, env(safe-area-inset-right)) 0 max(24px, env(safe-area-inset-left));
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(245, 245, 247, 0.82);
  border-bottom: 1px solid rgba(210, 210, 215, 0.6);
  backdrop-filter: blur(18px) saturate(1.6);
  -webkit-backdrop-filter: blur(18px) saturate(1.6);
}

.brand-row {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  color: #0f1114;
  font-weight: 900;
  line-height: 1;
}

.brand-word {
  font-size: 19px;
}

.brand-mark {
  width: 25px;
  height: 25px;
  border: 3px solid currentColor;
  border-radius: 8px;
  display: grid;
  place-items: center;
  font-size: 17px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 26px;
  color: #70757a;
  font-size: 14px;
  font-weight: 600;
}

.site-nav a {
  transition: color 160ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--ink);
}

.hero {
  position: relative;
  min-height: 100dvh;
  overflow: hidden;
  background: var(--canvas);
}

.hero-media {
  position: absolute;
  inset: 64px 0 0 31%;
  z-index: 0;
  overflow: hidden;
}

.hero-media::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(90deg, var(--canvas) 0%, rgba(245, 245, 247, 0.82) 20%, rgba(245, 245, 247, 0.05) 46%, rgba(245, 245, 247, 0.18) 100%),
    linear-gradient(180deg, rgba(245, 245, 247, 0) 70%, var(--canvas) 100%);
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center right;
}

.hero-media picture {
  display: block;
  width: 100%;
  height: 100%;
}

.hero-inner {
  position: relative;
  z-index: 2;
  width: min(var(--container), calc(100% - 56px));
  min-height: 100dvh;
  margin: 0 auto;
  padding: 64px 0 52px;
  display: grid;
  align-items: center;
}

.hero-copy {
  width: min(560px, 100%);
  padding-top: 12px;
}

.product-label,
.section-kicker {
  color: #536a70;
  font-size: 18px;
  line-height: 1.25;
  font-weight: 720;
}

h1,
h2 {
  letter-spacing: 0;
}

h1 {
  margin-top: 18px;
  max-width: 11ch;
  color: var(--ink-strong);
  font-size: 78px;
  line-height: 0.98;
  font-weight: 780;
}

.lead {
  margin-top: 30px;
  color: var(--ink-strong);
  font-size: 33px;
  line-height: 1.2;
  font-weight: 720;
  text-wrap: balance;
}

.sublead {
  max-width: 22em;
  margin-top: 14px;
  color: #4d5459;
  font-size: 20px;
  line-height: 1.48;
  font-weight: 560;
  text-wrap: balance;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 34px;
}

.primary-cta,
.text-cta {
  min-height: 46px;
  border-radius: var(--radius-button);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 17px;
  font-weight: 700;
  transition: transform 160ms ease, background-color 160ms ease, color 160ms ease, border-color 160ms ease;
}

.primary-cta {
  padding: 0 24px;
  background: var(--accent);
  color: #fff;
}

.primary-cta:hover,
.primary-cta:focus-visible {
  background: var(--accent-hover);
}

.text-cta {
  padding: 0 8px;
  color: var(--accent);
}

.primary-cta:active,
.text-cta:active,
.download-button:active {
  transform: scale(0.985);
}

.primary-cta:focus-visible,
.text-cta:focus-visible,
.download-button:focus-visible {
  outline: 3px solid rgba(47, 58, 63, 0.25);
  outline-offset: 4px;
}

.download-section,
.value-section {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  background: var(--paper);
}

.download-section {
  padding: 96px 0;
  scroll-margin-top: 64px;
}

.download-wrap,
.value-wrap {
  width: min(var(--container), calc(100% - 56px));
  margin: 0 auto;
}

.download-wrap {
  display: grid;
  grid-template-columns: minmax(260px, 0.82fr) minmax(520px, 1.18fr);
  gap: 76px;
  align-items: start;
}

.section-copy {
  position: sticky;
  top: 102px;
}

.section-copy h2,
.value-intro h2 {
  margin-top: 16px;
  color: var(--ink-strong);
  font-size: 50px;
  line-height: 1.04;
  font-weight: 760;
  text-wrap: balance;
}

.section-copy p:last-child,
.value-intro p {
  max-width: 25em;
  margin-top: 18px;
  color: #74787d;
  font-size: 17px;
  line-height: 1.55;
  font-weight: 500;
}

.download-content {
  min-width: 0;
}

.status-block {
  margin-bottom: 18px;
}

.status-line,
.desktop-hint,
.wechat-tip,
.safe-note,
.noscript-note {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.status-line {
  min-height: 22px;
  font-weight: 650;
}

.desktop-hint {
  margin-top: 4px;
}

.wechat-tip {
  margin-top: 12px;
  padding: 12px 14px;
  border-radius: 12px;
  background: var(--accent-soft);
  color: #455b62;
  font-weight: 650;
}

.download-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.download-button {
  min-height: 132px;
  padding: 24px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-card);
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: 18px;
  background: linear-gradient(180deg, #fbfbfc 0%, #f4f5f6 100%);
  color: var(--ink);
  box-shadow: none;
  transition: transform 160ms ease, border-color 160ms ease, background-color 160ms ease;
}

.download-button:hover,
.download-button:focus-visible {
  border-color: #b9bdc1;
  background: #fff;
  transform: translateY(-2px);
}

.download-button[data-disabled="false"] {
  border-color: #dfe1e5;
  background: linear-gradient(180deg, #ffffff 0%, #f7f8f9 100%);
  color: var(--ink-strong);
}

.download-button[data-disabled="true"] {
  cursor: not-allowed;
  color: var(--quiet);
  background: #f1f1f4;
  border-color: #e3e3e8;
  transform: none;
}

.download-button[data-disabled="true"]:hover {
  border-color: #e3e3e8;
  background: #f1f1f4;
}

.page-shell[data-device="ios"] .ios-button[data-disabled="false"],
.page-shell[data-device="android"] .android-button[data-disabled="false"] {
  border-color: #dfe1e5;
  background: linear-gradient(180deg, #ffffff 0%, #f7f8f9 100%);
  color: var(--ink-strong);
  box-shadow: none;
}

.page-shell[data-device="desktop"] .ios-button[data-disabled="false"] {
  border-color: #dfe1e5;
  background: linear-gradient(180deg, #ffffff 0%, #f7f8f9 100%);
  color: var(--ink-strong);
  box-shadow: none;
}

.page-shell[data-device="ios"] .ios-button[data-disabled="false"]:hover,
.page-shell[data-device="android"] .android-button[data-disabled="false"]:hover,
.page-shell[data-device="desktop"] .ios-button[data-disabled="false"]:hover {
  background: #fff;
}

.button-copy {
  min-width: 0;
  display: grid;
  gap: 6px;
}

.button-platform {
  font-size: 28px;
  line-height: 1;
  font-weight: 800;
  overflow-wrap: anywhere;
}

.button-caption,
.button-meta,
.button-action {
  line-height: 1.35;
  font-weight: 650;
}

.button-caption {
  color: currentColor;
  font-size: 14px;
  opacity: 0.72;
}

.button-meta {
  color: currentColor;
  font-size: 13px;
  opacity: 0.68;
}

.button-action {
  align-self: end;
  justify-self: end;
  color: var(--accent);
  font-size: 15px;
  white-space: nowrap;
}

.page-shell[data-device="ios"] .ios-button[data-disabled="false"] .button-action,
.page-shell[data-device="android"] .android-button[data-disabled="false"] .button-action,
.page-shell[data-device="desktop"] .ios-button[data-disabled="false"] .button-action {
  color: var(--accent);
}

.download-button[data-disabled="true"] .button-action {
  color: currentColor;
  opacity: 0.78;
}

.safe-note,
.noscript-note {
  margin-top: 18px;
}

.page-shell[data-device="ios"] .ios-button,
.page-shell[data-device="android"] .android-button {
  order: -1;
}

.page-shell[data-page-state="error"] .status-line {
  color: var(--danger);
}

.page-shell[data-page-state="ready"] .status-line {
  color: #455b62;
}

.value-section {
  padding: 96px 0;
  scroll-margin-top: 64px;
}

.value-wrap {
  padding-top: 92px;
}

.value-intro {
  max-width: 720px;
}

.value-list {
  margin-top: 54px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border-radius: var(--radius-panel);
  overflow: hidden;
}

.value-item {
  min-height: 210px;
  padding: 34px;
  background: var(--paper-soft);
}

.value-item h3 {
  color: var(--ink-strong);
  font-size: 26px;
  line-height: 1.16;
  font-weight: 760;
  text-wrap: balance;
}

.value-item p {
  margin-top: 16px;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.58;
  font-weight: 500;
}

body.browser-overlay-open {
  overflow: hidden;
  touch-action: none;
}

.browser-overlay {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  align-items: start;
  justify-items: center;
  padding: max(72px, calc(env(safe-area-inset-top) + 28px)) 16px max(24px, env(safe-area-inset-bottom));
  background: rgba(245, 245, 247, 0.72);
  backdrop-filter: blur(18px) saturate(1.2);
  -webkit-backdrop-filter: blur(18px) saturate(1.2);
}

.browser-overlay[hidden] {
  display: none;
}

.browser-dialog {
  position: relative;
  width: min(420px, calc(100vw - 32px));
  padding: 30px;
  border: 1px solid rgba(215, 217, 221, 0.72);
  border-radius: var(--radius-panel);
  background: rgba(255, 255, 255, 0.92);
  color: var(--ink);
  box-shadow: 0 24px 70px rgba(31, 34, 37, 0.16);
}

.browser-dialog-arrow {
  position: absolute;
  top: -52px;
  right: 28px;
  width: 46px;
  height: 46px;
  color: rgba(47, 58, 63, 0.88);
  pointer-events: none;
}

.browser-dialog-arrow svg {
  display: block;
  width: 100%;
  height: 100%;
  overflow: visible;
  filter: drop-shadow(0 8px 14px rgba(31, 34, 37, 0.12));
}

.browser-dialog-arrow path {
  fill: none;
  stroke: currentColor;
  stroke-width: 3.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.browser-dialog-kicker {
  color: #536a70;
  font-size: 14px;
  line-height: 1.35;
  font-weight: 720;
}

.browser-dialog h2 {
  margin-top: 10px;
  color: var(--ink-strong);
  font-size: 32px;
  line-height: 1.12;
  font-weight: 780;
}

.browser-dialog p + p,
.browser-dialog #browserOverlayDescription,
.browser-dialog .browser-dialog-description {
  margin-top: 14px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.62;
  font-weight: 520;
}

.browser-dialog-action {
  width: 100%;
  min-height: 48px;
  margin-top: 24px;
  border: 0;
  border-radius: var(--radius-button);
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-size: 16px;
  font-weight: 720;
  cursor: pointer;
  transition: transform 160ms ease, background-color 160ms ease;
}

.browser-dialog-action:hover,
.browser-dialog-action:focus-visible {
  background: var(--accent-hover);
}

.browser-dialog-action:focus-visible {
  outline: 3px solid rgba(47, 58, 63, 0.25);
  outline-offset: 4px;
}

.browser-dialog-action:active {
  transform: scale(0.985);
}

@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .browser-overlay {
    background: rgba(245, 245, 247, 0.94);
  }
}

@media (max-width: 1120px) {
  .hero-media {
    inset-left: 35%;
  }

  h1 {
    font-size: 72px;
  }

  .lead {
    font-size: 32px;
  }

  .download-wrap {
    gap: 46px;
    grid-template-columns: minmax(240px, 0.72fr) minmax(470px, 1.28fr);
  }
}

@media (max-width: 880px) {
  .site-header {
    height: 58px;
    padding-left: max(18px, env(safe-area-inset-left));
    padding-right: max(18px, env(safe-area-inset-right));
  }

  .site-nav {
    gap: 18px;
    font-size: 13px;
  }

  .hero {
    min-height: 100vh;
    min-height: 100svh;
    display: block;
  }

  .hero-media {
    position: absolute;
    inset: 58px 0 0 0;
    height: auto;
    margin-top: 0;
    border-bottom: 0;
  }

  .hero-media::before {
    background:
      linear-gradient(180deg, rgba(245, 245, 247, 1) 0%, rgba(245, 245, 247, 0.96) 36%, rgba(245, 245, 247, 0.32) 50%, rgba(245, 245, 247, 0.03) 70%, rgba(245, 245, 247, 0.1) 88%, var(--canvas) 100%),
      linear-gradient(90deg, rgba(245, 245, 247, 0.86) 0%, rgba(245, 245, 247, 0.18) 50%, rgba(245, 245, 247, 0.56) 100%);
  }

  .hero-media img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    max-width: 100%;
    object-fit: cover;
    object-position: center bottom;
    transform: none;
  }

  .hero-inner {
    width: min(100% - 36px, 640px);
    min-height: 100vh;
    min-height: 100svh;
    align-items: start;
    justify-items: center;
    padding: clamp(88px, 11svh, 108px) 0 0;
  }

  .hero-copy {
    width: 100%;
    display: grid;
    justify-items: center;
    text-align: center;
  }

  h1 {
    max-width: none;
    font-size: 56px;
    line-height: 1;
  }

  .lead {
    margin-top: 22px;
    font-size: 28px;
  }

  .sublead {
    max-width: 21em;
    font-size: 18px;
  }

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

  .download-section {
    min-height: 100svh;
    padding: 82px 0 88px;
  }

  .download-wrap,
  .value-wrap {
    width: min(100% - 36px, 640px);
  }

  .download-wrap {
    display: block;
  }

  .section-copy {
    position: static;
  }

  .section-copy h2,
  .value-intro h2 {
    font-size: 42px;
  }

  .download-content {
    margin-top: 34px;
  }

  .download-actions {
    grid-template-columns: 1fr;
  }

  .download-button {
    min-height: 112px;
  }

  .value-section {
    min-height: 100svh;
    padding-bottom: 82px;
  }

  .value-wrap {
    padding-top: 72px;
  }

  .value-list {
    grid-template-columns: 1fr;
    border-radius: var(--radius-card);
  }

  .value-item {
    min-height: auto;
    padding: 28px;
  }
}

@media (max-width: 480px) {
  .brand-word {
    font-size: 17px;
  }

  .brand-mark {
    width: 23px;
    height: 23px;
    border-width: 3px;
    font-size: 15px;
    border-radius: 7px;
  }

  .hero-inner {
    width: min(100% - 28px, 430px);
    min-height: 100vh;
    min-height: 100svh;
    padding-top: clamp(84px, 10svh, 100px);
  }

  .hero {
    min-height: 100vh;
    min-height: 100svh;
  }

  .product-label,
  .section-kicker {
    font-size: 16px;
  }

  h1 {
    font-size: 44px;
  }

  .lead {
    font-size: 24px;
  }

  .sublead {
    max-width: 17em;
    font-size: 16px;
    line-height: 1.45;
  }

  .hero-actions {
    gap: 10px;
    margin-top: 26px;
  }

  .primary-cta,
  .text-cta {
    font-size: 16px;
  }

  .primary-cta {
    min-width: 128px;
  }

  .hero-media {
    top: 58px;
  }

  .hero-media img {
    object-position: center bottom;
  }

  .download-wrap,
  .value-wrap {
    width: min(100% - 28px, 430px);
  }

  .download-section {
    padding-top: 68px;
  }

  .section-copy h2,
  .value-intro h2 {
    font-size: 34px;
  }

  .section-copy p:last-child,
  .value-intro p {
    font-size: 16px;
  }

  .download-button {
    min-height: 104px;
    padding: 20px;
    border-radius: 16px;
  }

  .button-platform {
    font-size: 24px;
  }

  .button-caption,
  .button-action {
    font-size: 14px;
  }

  .button-meta {
    font-size: 12px;
  }

  .value-item h3 {
    font-size: 23px;
  }

  .value-item p {
    font-size: 16px;
  }

  .browser-overlay {
    align-items: start;
    padding-top: max(82px, calc(env(safe-area-inset-top) + 28px));
  }

  .browser-dialog {
    padding: 26px;
    border-radius: 22px;
  }

  .browser-dialog h2 {
    font-size: 29px;
  }
}

@media (max-width: 360px) {
  .site-nav {
    display: none;
  }

  h1 {
    font-size: 40px;
  }

  .download-button {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .button-action {
    justify-self: start;
  }

  .browser-dialog {
    width: calc(100vw - 28px);
    padding: 24px;
  }

  .browser-dialog h2 {
    font-size: 27px;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}