:root {
  color-scheme: light dark;
  --site-brand: #0066ff;
  --site-brand-hover: #0055df;
  --site-brand-soft: rgba(0, 102, 255, 0.10);
  --site-background: #f5f7fb;
  --site-surface: #ffffff;
  --site-surface-raised: rgba(255, 255, 255, 0.92);
  --site-text: #101521;
  --site-secondary: #5f6878;
  --site-border: rgba(16, 21, 33, 0.10);
  --site-shadow: 0 10px 30px rgba(16, 47, 104, 0.08);
  --site-width: 1160px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --site-brand: #3385ff;
    --site-brand-hover: #66a3ff;
    --site-brand-soft: rgba(0, 102, 255, 0.19);
    --site-background: #070a10;
    --site-surface: #121721;
    --site-surface-raised: rgba(18, 23, 33, 0.92);
    --site-text: #f5f7fb;
    --site-secondary: #a8b1c0;
    --site-border: rgba(255, 255, 255, 0.10);
    --site-shadow: none;
  }
}

html { scroll-padding-top: 122px; }

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

html[data-language="en"] .lang.en,
html[data-language="zh-Hans"] .lang.zh {
  display: inline;
}

html[data-language="en"] [data-panel="zh-Hans"],
html[data-language="zh-Hans"] [data-panel="en"] {
  display: none !important;
}

.site-container {
  width: min(calc(100% - 40px), var(--site-width));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 12px 20px;
  border-bottom: 1px solid transparent;
  background: rgba(245, 247, 251, 0.82);
  backdrop-filter: saturate(165%) blur(20px);
  -webkit-backdrop-filter: saturate(165%) blur(20px);
}

@media (prefers-color-scheme: dark) {
  .site-header { background: rgba(7, 10, 16, 0.82); }
}

.site-nav {
  width: min(100%, var(--site-width));
  min-height: 52px;
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: 22px;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  color: var(--site-text);
  text-decoration: none;
  font-size: 17px;
  font-weight: 780;
  letter-spacing: -0.025em;
}

.site-brand img {
  width: 30px;
  height: 30px;
  border-radius: 9px;
  box-shadow: 0 7px 18px rgba(0, 102, 255, 0.23);
}

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

.site-nav-links a {
  padding: 8px 11px;
  border-radius: 9px;
  color: var(--site-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 630;
  line-height: 1.4;
  white-space: nowrap;
}

.site-nav-links a:hover,
.site-nav-links a:focus-visible,
.site-nav-links a[aria-current="page"] {
  color: var(--site-text);
  background: var(--site-brand-soft);
  outline: none;
}

.site-language {
  display: inline-flex;
  flex: 0 0 auto;
  padding: 3px;
  border: 1px solid var(--site-border);
  border-radius: 999px;
  background: var(--site-surface-raised);
}

.site-language button {
  min-width: 40px;
  border: 0;
  border-radius: 999px;
  padding: 6px 9px;
  background: transparent;
  color: var(--site-secondary);
  font: inherit;
  font-size: 12px;
  line-height: 1.4;
  cursor: pointer;
}

.site-language button:hover { color: var(--site-text); }

.site-language button:focus-visible {
  outline: 2px solid var(--site-brand);
  outline-offset: 2px;
}

.site-language button[aria-pressed="true"] {
  background: var(--site-brand);
  color: #fff;
  font-weight: 750;
}

.page-nav {
  position: sticky;
  top: 76px;
  z-index: 90;
  border-block: 1px solid var(--site-border);
  background: var(--site-surface-raised);
  backdrop-filter: saturate(155%) blur(16px);
  -webkit-backdrop-filter: saturate(155%) blur(16px);
}

.page-nav-scroll {
  min-height: 45px;
  display: flex;
  align-items: center;
  gap: 5px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-nav-scroll::-webkit-scrollbar { display: none; }

.page-nav a {
  flex: 0 0 auto;
  padding: 7px 11px;
  border-radius: 9px;
  color: var(--site-secondary);
  text-decoration: none;
  font-size: 13px;
  font-weight: 630;
  white-space: nowrap;
}

.page-nav a:hover,
.page-nav a:focus-visible {
  color: var(--site-brand);
  background: var(--site-brand-soft);
  outline: none;
}

.site-footer {
  display: block;
  width: auto;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--site-border);
  background: transparent;
  color: var(--site-secondary);
  text-align: left;
}

.site-footer-row {
  min-height: 112px;
  display: flex;
  align-items: center;
  gap: 24px;
  color: var(--site-secondary);
  font-size: 13px;
}

.site-footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--site-text);
  font-weight: 740;
}

.site-footer-brand img {
  width: 25px;
  height: 25px;
  border-radius: 8px;
}

.site-footer-copy { margin-left: 4px; }

.site-footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-left: auto;
}

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

.site-footer-links a:hover,
.site-footer-links a:focus-visible {
  color: var(--site-brand);
  outline: none;
}

.smart-download {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 18px;
  margin: 30px 0 22px;
  padding: 20px 22px;
  border: 1px solid rgba(0, 102, 255, 0.24);
  border-radius: 19px;
  background:
    linear-gradient(135deg, var(--site-brand-soft), transparent 70%),
    var(--site-surface);
  box-shadow: var(--site-shadow);
}

.smart-download-icon {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 15px;
  background: var(--site-brand);
  color: #fff;
  font-size: 22px;
  font-weight: 800;
}

.smart-download-copy strong {
  display: block;
  color: var(--site-text);
  font-size: 1.02rem;
}

.smart-download-copy span {
  display: block;
  margin-top: 3px;
  color: var(--site-secondary);
  font-size: 13px;
}

.smart-download-action {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  border: 1px solid var(--site-brand);
  border-radius: 12px;
  background: var(--site-brand);
  color: #fff;
  text-decoration: none;
  font-size: 14px;
  font-weight: 740;
  white-space: nowrap;
}

.smart-download-action:hover { background: var(--site-brand-hover); }
.smart-download-action[aria-disabled="true"] { opacity: 0.55; pointer-events: none; }

.download-link.is-recommended {
  border-radius: 12px;
  background: var(--site-brand-soft);
  box-shadow: inset 0 0 0 1px rgba(0, 102, 255, 0.24);
}

.download-link.is-recommended .download-name::after {
  content: "Recommended";
  width: max-content;
  margin-top: 4px;
  padding: 2px 7px;
  border-radius: 999px;
  background: var(--site-brand);
  color: #fff;
  font-size: 10px;
  font-weight: 730;
}

html[data-language="zh-Hans"] .download-link.is-recommended .download-name::after {
  content: "推荐";
}

@media (max-width: 880px) {
  .site-nav { gap: 12px; }
  .site-nav-links a:nth-child(2) { display: none; }
  .smart-download { grid-template-columns: auto 1fr; }
  .smart-download-action { grid-column: 1 / -1; }
}

@media (max-width: 700px) {
  html { scroll-padding-top: 115px; }
  .site-container { width: min(calc(100% - 26px), var(--site-width)); }
  .site-header { padding-inline: 13px; }
  .site-brand span { display: none; }
  .site-nav-links { overflow-x: auto; scrollbar-width: none; }
  .site-nav-links::-webkit-scrollbar { display: none; }
  .site-nav-links a { padding-inline: 9px; }
  .site-nav-links a:nth-child(3) { display: none; }
  .site-language button { min-width: 35px; padding-inline: 7px; }
  .page-nav { top: 76px; }
  .page-nav-scroll { width: calc(100% - 26px); }
  .site-footer-row { flex-direction: column; justify-content: center; padding: 28px 0; text-align: center; }
  .site-footer-copy { margin-left: 0; }
  .site-footer-links { justify-content: center; margin-left: 0; }
  .smart-download { grid-template-columns: 1fr; text-align: center; }
  .smart-download-icon { margin-inline: auto; }
  .smart-download-action { grid-column: auto; }
}

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