:root {
  --color-page: #FFFFFF;
  --color-panel: #F7F5F1;
  --color-panel-strong: #F1EDE6;
  --color-line: #E9E4DC;
  --color-brand: #F86A33;
  --color-brand-deep: #DD4E1A;
  --color-ink: #211D1A;
  --color-muted: #6E675F;
  --color-success: #2FA35C;
  --color-warning: #DFA100;
  --color-danger: #CE3B2E;
  --color-on-brand: #FFFFFF;
  --color-shadow-faint: rgba(33, 29, 26, 0.04);
  --color-shadow-soft: rgba(33, 29, 26, 0.08);
  --color-shadow-app: rgba(33, 29, 26, 0.10);
  --color-shadow-brand: rgba(221, 78, 26, 0.45);
  --color-shadow-brand-light: rgba(221, 78, 26, 0.22);
  --color-switch-shadow: rgba(33, 29, 26, 0.20);
  --color-glow-core: rgba(248, 120, 60, 0.30);
  --color-glow-middle: rgba(248, 130, 70, 0.13);
  --color-glow-clear: rgba(255, 255, 255, 0);
  --gradient-brand: linear-gradient(135deg, var(--color-brand) 0%, var(--color-brand-deep) 100%);
  --gradient-glow: radial-gradient(58% 62% at 74% 24%, var(--color-glow-core) 0%, var(--color-glow-middle) 46%, var(--color-glow-clear) 76%);
  --font-display: 'Inter', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Inter', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Menlo, Consolas, monospace;
  --radius-xl: 24px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --radius-round: 999px;
  --shadow-soft: 0 1px 2px var(--color-shadow-faint), 0 10px 30px -8px var(--color-shadow-soft);
  --shadow-app: 0 2px 6px var(--color-shadow-faint), 0 18px 40px -12px var(--color-shadow-app), 0 40px 90px -30px var(--color-shadow-brand-light);
  --shadow-button: 0 8px 22px -8px var(--color-shadow-brand);
  --shadow-button-hover: 0 12px 28px -8px var(--color-shadow-brand);
  --content-width: 1224px;
  --reading-width: 840px;
  --header-width: 1280px;
  --header-height: 76px;
  --gutter: 32px;
  --section-space: 104px;
  --transition-fast: 180ms ease;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

html.nav-open {
  overflow: hidden;
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: clip;
  background: var(--color-page);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

main,
section,
article,
aside,
header,
footer,
nav,
div {
  min-width: 0;
}

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

p,
h1,
h2,
h3,
h4,
ul,
ol,
dl,
dd,
blockquote,
figure {
  margin: 0;
}

ul,
ol {
  padding: 0;
}

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

button,
input,
select,
textarea {
  font: inherit;
}

button {
  border: 0;
  cursor: pointer;
}

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

:focus-visible {
  outline: 2px solid var(--color-brand);
  outline-offset: 3px;
  border-radius: var(--radius-xs);
}

::selection {
  background: var(--color-panel-strong);
  color: var(--color-ink);
}

code,
kbd,
samp,
pre {
  font-family: var(--font-mono);
}

:not(pre) > code {
  overflow-wrap: anywhere;
  padding: 0.12em 0.36em;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-xs);
  background: var(--color-panel);
  color: var(--color-ink);
  font-size: 0.9em;
}

pre {
  max-width: 100%;
  overflow-x: auto;
  margin: 20px 0;
  padding: 20px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-panel);
  color: var(--color-ink);
  line-height: 1.7;
  -webkit-overflow-scrolling: touch;
}

pre code {
  overflow-wrap: normal;
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
}

.wrap {
  width: 100%;
  max-width: calc(var(--content-width) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.reading-wrap {
  width: 100%;
  max-width: calc(var(--reading-width) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  padding-top: var(--section-space);
  padding-bottom: var(--section-space);
}

.section-tight {
  padding-top: 64px;
  padding-bottom: 64px;
}

h1,
h2,
h3,
h4 {
  color: var(--color-ink);
  font-family: var(--font-display);
  line-height: 1.2;
  text-wrap: balance;
}

h1 {
  font-size: clamp(34px, 4vw, 48px);
  font-weight: 800;
  letter-spacing: -0.015em;
}

h2 {
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 800;
  letter-spacing: -0.012em;
}

h3 {
  font-size: clamp(21px, 2vw, 27px);
  font-weight: 750;
}

h4 {
  font-size: 18px;
  font-weight: 700;
}

.keep-word {
  white-space: nowrap;
}

.lead {
  max-width: 44em;
  color: var(--color-muted);
  font-size: clamp(17px, 1.6vw, 20px);
}

.muted {
  color: var(--color-muted);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  max-width: 100%;
  gap: 8px;
  margin-bottom: 18px;
  padding: 5px 14px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-round);
  background: var(--color-page);
  color: var(--color-brand-deep);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.09em;
}

.eyebrow::before {
  width: 7px;
  height: 7px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--color-brand);
  content: "";
}

.gradient-text {
  background: var(--gradient-brand);
  color: transparent;
  background-clip: text;
  -webkit-background-clip: text;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  max-width: 100%;
  padding: 12px 24px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-round);
  background: var(--color-page);
  color: var(--color-ink);
  font-weight: 700;
  line-height: 1.25;
  text-align: center;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.button:hover {
  border-color: var(--color-brand);
  transform: translateY(-2px);
}

.button-primary {
  border-color: var(--color-brand-deep);
  background: var(--gradient-brand);
  color: var(--color-on-brand);
  box-shadow: var(--shadow-button);
}

.button-primary:hover {
  border-color: var(--color-brand-deep);
  box-shadow: var(--shadow-button-hover);
}

.button-small {
  min-height: 40px;
  padding: 9px 18px;
  font-size: 14px;
}

.button[aria-disabled="true"],
.button:disabled {
  cursor: not-allowed;
  opacity: 0.58;
  transform: none;
}

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

.panel,
.card {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-xl);
  background: var(--color-page);
  color: var(--color-ink);
}

.panel {
  padding: clamp(24px, 4vw, 56px);
  background: var(--color-panel);
}

.card {
  padding: 24px;
  box-shadow: var(--shadow-soft);
}

.card-title {
  margin-bottom: 10px;
}

.card-copy {
  color: var(--color-muted);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.chip-row,
.platform-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  display: inline-flex;
  align-items: center;
  max-width: 100%;
  gap: 7px;
  padding: 6px 12px;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-round);
  background: var(--color-panel);
  color: var(--color-muted);
  font-size: 13px;
  line-height: 1.35;
}

.chip svg {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
}

.table-wrap {
  max-width: 100%;
  overflow-x: auto;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  -webkit-overflow-scrolling: touch;
}

.data-table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  background: var(--color-page);
  color: var(--color-ink);
}

.data-table th,
.data-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--color-line);
  text-align: left;
  vertical-align: top;
}

.data-table th {
  background: var(--color-panel);
  color: var(--color-ink);
  font-size: 14px;
}

.data-table tr:last-child td {
  border-bottom: 0;
}

.prose {
  color: var(--color-ink);
}

.prose > * + * {
  margin-top: 18px;
}

.prose h2 {
  margin-top: 64px;
  scroll-margin-top: calc(var(--header-height) + 24px);
}

.prose h3 {
  margin-top: 38px;
  scroll-margin-top: calc(var(--header-height) + 24px);
}

.prose p,
.prose li {
  overflow-wrap: break-word;
}

.prose a {
  color: var(--color-brand-deep);
  text-decoration: underline;
  text-decoration-color: var(--color-brand);
  text-underline-offset: 3px;
}

.prose ul,
.prose ol {
  padding-left: 1.35em;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 560ms ease, transform 560ms ease;
}

.reveal.shown {
  opacity: 1;
  transform: none;
}

.tilt-soft {
  transform: rotate(-2deg);
}

.site-head {
  position: relative;
  z-index: 100;
  background: var(--color-page);
  color: var(--color-ink);
}

.head-bar {
  display: flex;
  width: 100%;
  max-width: min(100%, calc(var(--header-width) + var(--gutter) * 2));
  height: var(--header-height);
  align-items: center;
  gap: 30px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.brand {
  display: inline-flex;
  flex-shrink: 0;
  align-items: center;
  gap: 11px;
}

.brand img {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 750;
  letter-spacing: -0.01em;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.nav-link,
.more-button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius-round);
  background: transparent;
  color: var(--color-ink);
  font-size: 15px;
  transition: background var(--transition-fast);
}

.nav-link:hover,
.more-button:hover {
  background: var(--color-panel);
}

.nav-link.is-active {
  position: relative;
  font-weight: 700;
}

.nav-link.is-active::after {
  position: absolute;
  right: 14px;
  bottom: 4px;
  left: 14px;
  height: 2px;
  border-radius: var(--radius-round);
  background: var(--gradient-brand);
  content: "";
}

.nav-more,
.language-picker {
  position: relative;
}

.more-button svg,
.language-button svg {
  width: 11px;
  height: 11px;
  flex-shrink: 0;
}

.more-menu,
.language-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  z-index: 110;
  min-width: 168px;
  padding: 8px;
  visibility: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-page);
  color: var(--color-ink);
  box-shadow: var(--shadow-soft);
  opacity: 0;
  transform: translate(-50%, 6px);
  transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
}

.more-menu a,
.language-menu a {
  display: flex;
  width: 100%;
  min-height: 44px;
  align-items: center;
  padding: 9px 13px;
  border-radius: var(--radius-sm);
  color: var(--color-ink);
  font-size: 14px;
}

.more-menu a:hover,
.language-menu a:hover,
.language-menu a[aria-current="true"] {
  background: var(--color-panel);
}

.nav-more:hover .more-menu,
.nav-more:focus-within .more-menu,
.nav-more.is-open .more-menu,
.language-picker.is-open .language-menu {
  visibility: visible;
  opacity: 1;
  transform: translate(-50%, 0);
}

.header-tools {
  display: flex;
  align-items: center;
  gap: 10px;
}

.language-button {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  gap: 6px;
  padding: 7px 13px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-round);
  background: var(--color-page);
  color: var(--color-muted);
  white-space: nowrap;
}

.language-button:hover {
  border-color: var(--color-brand);
  color: var(--color-ink);
}

.language-short {
  display: none;
}

.head-download {
  min-height: 42px;
  padding: 9px 19px;
  font-size: 14px;
}

.menu-toggle {
  display: none;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-round);
  background: var(--color-page);
  color: var(--color-ink);
}

.menu-toggle svg {
  width: 20px;
  height: 20px;
}

.mobile-drawer {
  display: none;
}

.nav-veil {
  display: none;
}

.site-footer {
  margin-top: 96px;
  border-top: 1px solid var(--color-line);
  background: var(--color-panel);
  color: var(--color-ink);
}

.footer-inner {
  width: 100%;
  max-width: calc(var(--header-width) + var(--gutter) * 2);
  margin-inline: auto;
  padding: 64px var(--gutter) 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.8fr 1.4fr 0.8fr;
  gap: 44px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 11px;
  margin-bottom: 15px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 750;
}

.footer-brand img {
  width: 34px;
  height: 34px;
  flex-shrink: 0;
}

.footer-intro {
  max-width: 30em;
  color: var(--color-muted);
  font-size: 14px;
}

.footer-title {
  margin-bottom: 14px;
  font-size: 14px;
  letter-spacing: 0.04em;
}

.footer-links {
  display: grid;
  gap: 8px;
  list-style: none;
}

.footer-links a {
  display: inline-block;
  padding-block: 3px;
  color: var(--color-muted);
  font-size: 14px;
}

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

.footer-keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
}

.footer-keywords a {
  display: inline-flex;
  max-width: 100%;
  padding: 5px 10px;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-round);
  background: var(--color-page);
  color: var(--color-muted);
  font-size: 12px;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-top: 46px;
  padding-top: 22px;
  border-top: 1px solid var(--color-line);
  color: var(--color-muted);
  font-size: 13px;
}

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

.decorated-section {
  position: relative;
  overflow-x: clip;
}

.decorative-fill-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

@media (max-width: 1120px) {
  .desktop-nav {
    display: none;
  }

  .header-tools {
    margin-left: auto;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .head-download {
    display: none;
  }

  .mobile-drawer {
    position: fixed;
    top: var(--header-height);
    right: 0;
    left: 0;
    z-index: 103;
    max-height: calc(100dvh - var(--header-height));
    overflow-y: auto;
    padding: 12px var(--gutter) 24px;
    overscroll-behavior: contain;
    border-top: 1px solid var(--color-line);
    border-bottom: 1px solid var(--color-line);
    background: var(--color-page);
    color: var(--color-ink);
    box-shadow: var(--shadow-soft);
  }

  .mobile-drawer.is-open {
    display: block;
  }

  .mobile-drawer ul {
    display: grid;
    gap: 3px;
    list-style: none;
  }

  .mobile-drawer a {
    display: flex;
    width: 100%;
    min-height: 48px;
    align-items: center;
    justify-content: space-between;
    padding: 11px 14px;
    border-radius: var(--radius-sm);
    color: var(--color-ink);
  }

  .mobile-drawer a:hover,
  .mobile-drawer a.is-active,
  .mobile-drawer a[aria-current="true"] {
    background: var(--color-panel);
  }

  .mobile-language-title {
    margin: 15px 14px 6px;
    color: var(--color-muted);
    font-size: 12px;
    letter-spacing: 0.08em;
  }

  .nav-veil {
    position: fixed;
    inset: var(--header-height) 0 0;
    z-index: 101;
    background: var(--color-shadow-soft);
  }

  .nav-veil.is-open {
    display: block;
  }

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

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

@media (max-width: 768px) {
  :root {
    --gutter: 20px;
    --section-space: 76px;
  }

  h1 {
    font-size: clamp(26px, 7.4vw, 30px);
  }

  h2 {
    font-size: clamp(25px, 6.4vw, 32px);
  }

  .language-full {
    display: none;
  }

  .language-short {
    display: inline;
  }

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

@media (max-width: 640px) {
  :root {
    --gutter: 16px;
  }

  .head-bar {
    gap: 10px;
  }

  .brand-name {
    font-size: 16px;
  }

  .language-button {
    min-width: 44px;
    justify-content: center;
    padding-inline: 10px;
  }

  .card-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .button-row {
    align-items: stretch;
  }

  .button-row .button {
    flex: 1 1 auto;
  }

  .panel,
  .card {
    border-radius: var(--radius-lg);
  }

  .tilt-soft,
  [class*="tilt"] {
    transform: none;
  }

  .chip-row,
  .platform-row {
    flex-direction: row;
    flex-wrap: wrap;
  }
}

@media (max-width: 380px) {
  .brand-name {
    max-width: 126px;
    line-height: 1.15;
  }

  .header-tools {
    gap: 6px;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation: none !important;
    transition: none !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}