* {
  box-sizing: border-box;
  scrollbar-color: var(--color-scrollbar-thumb) var(--l-bg);
}
*::-webkit-scrollbar-thumb {
  background-color: var(--color-scrollbar-thumb);
  border-radius: var(--radius-scrollbar);
}
*::-webkit-scrollbar-thumb:hover {
  background-color: var(--color-scrollbar-thumb-hover);
}
*::-webkit-scrollbar-button {
  display: none;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 112px;
}
html[data-i18n-pending] body > * {
  visibility: hidden;
}
body {
  margin: 0;
  background: var(--d-bg);
  color: var(--d-ink);
  transition:
    background 0.55s cubic-bezier(0.4, 0, 0.2, 1),
    color 0.55s cubic-bezier(0.4, 0, 0.2, 1);
}
body.on-light-page {
  background: var(--l-bg);
  color: var(--l-ink);
}
a {
  color: inherit;
  text-decoration: none;
}
button {
  font: inherit;
  color: inherit;
  cursor: pointer;
  border: 0;
  background: none;
}
img {
  display: block;
  max-width: 100%;
}
h1,
h2,
h3,
p {
  margin: 0;
}
svg {
  display: block;
}
a,
button {
  touch-action: manipulation;
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
[hidden] {
  display: none !important;
}
.container {
  width: min(var(--max), 100%);
  margin: auto;
}

/* VIEW */
.view {
  display: none;
}
.view.active {
  display: block;
}

/* HEADER */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--hd);
  padding: 16px 4.4%;
  z-index: 100;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
  background: transparent;
  border: 0;
  box-shadow: none;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  transition: color 0.55s cubic-bezier(0.4, 0, 0.2, 1);
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  height: 48px;
  justify-self: start;
}
.brand-mark {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: #fff;
  flex: none;
  transition: background 0.55s cubic-bezier(0.4, 0, 0.2, 1);
}
.brand-name {
  display: none;
  font-size: var(--fs-body);
  font-weight: 600;
  line-height: 1;
  color: var(--d-ink);
  white-space: nowrap;
  transition: color 0.55s cubic-bezier(0.4, 0, 0.2, 1);
}
html[lang^="zh"] .brand-name {
  display: inline-block;
}
.brand-logo {
  position: relative;
  display: block;
  width: 142px;
  height: 13px;
  overflow: hidden;
  flex: none;
}
.brand-logo__image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  max-width: none;
  transition: opacity 0.55s cubic-bezier(0.4, 0, 0.2, 1);
}
.brand-logo__image--light {
  top: -12.28%;
  left: -3.26%;
  width: 106.54%;
  height: 124.27%;
}
.brand-logo__image--dark {
  opacity: 0;
}
.header-actions {
  display: flex;
  gap: 8px;
  align-items: center;
  justify-self: end;
  flex-wrap: nowrap;
  white-space: nowrap;
}
.site-header__menu {
  display: contents;
}

.nav-glass {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2px;
  height: 48px;
  padding: 5px;
  border-radius: 999px;
  max-width: 100%;
  overflow: visible;
  background: var(--color-nav-glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: var(--shadow-nav-glass);
  transition:
    background 0.55s cubic-bezier(0.4, 0, 0.2, 1),
    border-color 0.55s cubic-bezier(0.4, 0, 0.2, 1),
    box-shadow 0.55s cubic-bezier(0.4, 0, 0.2, 1);
}
.nav-glass > a,
.nav-trigger {
  position: relative;
  font-size: var(--fs-sm);
  font-weight: 500;
  color: #e5e5ea;
  line-height: 22px;
  padding: 8px 16px;
  border-radius: 999px;
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  flex-shrink: 0;
  min-width: 112px;
  justify-content: center;
  transition:
    background 0.18s,
    color 0.55s cubic-bezier(0.4, 0, 0.2, 1);
}
.nav-glass > a:hover,
.nav-trigger:hover,
.nav-trigger:active {
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
}
.nav-trigger svg {
  width: 11px;
  height: 11px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  transition: transform 0.2s;
}
.nav-trigger[aria-expanded="true"] svg {
  transform: rotate(180deg);
}

.nav-product {
  position: relative;
}
.nav-product::after {
  content: "";
  position: absolute;
  top: 100%;
  left: -16px;
  right: -16px;
  height: 5px;
  pointer-events: auto;
}

.mega-menu {
  position: absolute;
  top: calc(100% + 5px);
  left: 0;
  width: 630px;
  color: var(--color-mega-menu-text);
  border: 1px solid var(--color-mega-menu-border);
  background: var(--color-mega-menu-bg);
  border-radius: var(--radius-mega-menu);
  padding: 20px 20px 12px;
  box-shadow: var(--shadow-mega-menu);
  backdrop-filter: blur(var(--blur-mega-menu)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--blur-mega-menu)) saturate(180%);
  opacity: 0;
  transform: translateY(-8px);
  transition:
    opacity 0.2s ease,
    transform 0.2s ease;
  pointer-events: none;
  z-index: 20;
}
@media (min-width: 961px) {
  .site-header:not(.on-light) .nav-glass {
    z-index: 0;
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
  .site-header:not(.on-light) .nav-glass::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    border-radius: inherit;
    background: var(--color-nav-glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    pointer-events: none;
  }
  .site-header:not(.on-light) .mega-menu {
    background: var(--color-nav-glass-bg);
  }
}
.mega-menu.open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.mega-menu.compact {
  width: 250px;
}
.mega-menu.compact > .mega-head {
  display: none;
}
@media (min-width: 961px) {
  .mega-menu.compact {
    padding: 10px 12px;
    border-radius: calc(var(--radius-mega-menu) - 4px);
  }
  .mega-menu.compact .mega-row.single {
    margin: 0 -4px;
    padding: 11px 12px;
  }
}
.mega-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 4px;
  padding: 2px 4px 12px;
}
.mega-head > span {
  font-size: var(--font-size-mega-menu-title);
  font-weight: 600;
}
.mega-head small {
  font-size: var(--fs-sm);
  color: var(--color-mega-menu-muted);
  margin-left: 8px;
  font-weight: 400;
}
.mega-head > a {
  margin-left: auto;
  font-size: var(--font-size-mega-menu-description);
  color: var(--color-mega-menu-text);
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 9px 14px;
  border-radius: 999px;
  transition:
    color var(--duration-mega-menu) ease,
    background var(--duration-mega-menu) ease;
}
.mega-head > a:hover,
.mega-head > a:focus-visible {
  color: var(--color-mega-menu-hover-text);
  background: var(--color-mega-menu-hover);
}
.mega-head > a:focus-visible,
.mega-row:focus-visible {
  outline: 2px solid var(--color-mega-menu-focus);
  outline-offset: 2px;
}
.mega-row {
  position: relative;
  display: grid;
  grid-template-columns: 128px 1fr;
  gap: 20px;
  align-items: center;
  padding: 14px 16px;
  margin: 0 -16px;
  border-radius: 12px;
  transition:
    background var(--duration-mega-menu) ease,
    transform var(--duration-mega-menu) ease;
}
.mega-row:not(:last-child)::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 1px;
  background: var(--color-mega-menu-divider);
  pointer-events: none;
}
.mega-row:hover,
.mega-row:focus-visible {
  background: var(--color-mega-menu-hover);
  transform: translateX(2px);
}
.mega-row > span {
  font-size: var(--font-size-mega-menu-item);
  font-weight: 500;
  color: var(--color-mega-menu-text);
}
.mega-row p {
  font-size: var(--font-size-mega-menu-description);
  line-height: 1.7;
  color: var(--color-mega-menu-muted);
  word-break: break-word;
  overflow-wrap: anywhere;
}
.mega-row:hover > span,
.mega-row:focus-visible > span {
  color: var(--color-mega-menu-hover-text);
}
.mega-row:hover p,
.mega-row:focus-visible p {
  color: var(--color-mega-menu-hover-text);
}
.mega-row.single {
  display: block;
  grid-template-columns: none;
  padding: 14px 16px;
}
.mobile-toggle {
  display: none;
}

/* 语言切换 */
.language-picker {
  position: relative;
}
.lang-switch {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-width: 64px;
  height: 38px;
  padding: 0 10px;
  border-radius: 999px;
  color: var(--color-language-menu-text);
  font-size: var(--fs-sm);
  font-weight: 600;
}
.lang-switch:focus-visible,
.language-option:focus-visible {
  outline: 2px solid var(--color-language-menu-check);
  outline-offset: 2px;
}
.lang-switch__chevron {
  width: 12px;
  height: 12px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  transition: transform var(--duration-language-menu) ease;
}
.lang-switch[aria-expanded="true"] .lang-switch__chevron {
  transform: rotate(180deg);
}
.language-menu {
  position: absolute;
  top: calc(100% + 10px);
  left: 0;
  z-index: 30;
  width: var(--width-language-menu);
  padding: var(--space-language-menu);
  border-radius: var(--radius-language-menu);
  background: var(--color-language-menu-bg);
  color: var(--color-language-menu-text);
  box-shadow: var(--shadow-language-menu);
  backdrop-filter: blur(24px) saturate(160%);
  -webkit-backdrop-filter: blur(24px) saturate(160%);
  opacity: 0;
  transform: translateY(-8px);
  pointer-events: none;
  transition:
    opacity var(--duration-language-menu) ease,
    transform var(--duration-language-menu) ease;
}
.language-menu.is-open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.language-option {
  display: flex;
  align-items: center;
  width: 100%;
  min-height: 40px;
  padding: 0 10px;
  border-radius: 10px;
  color: inherit;
  font-size: var(--font-size-language-menu);
  text-align: left;
  transition: background var(--duration-language-menu) ease;
}
.language-option:hover {
  background: var(--color-language-menu-hover);
}
.language-option::after {
  content: "";
  width: 7px;
  height: 12px;
  margin-left: auto;
  border-right: 1.5px solid var(--color-language-menu-check);
  border-bottom: 1.5px solid var(--color-language-menu-check);
  opacity: 0;
  transform: rotate(45deg) translate(-2px, 2px);
}
.language-option[aria-checked="true"]::after {
  opacity: 1;
}
.nav-glass > a,
.nav-trigger,
.btn-sm,
.btn,
.lang-switch {
  white-space: nowrap;
  flex-shrink: 0;
}

.site-header.on-light .brand-logo__image--light {
  opacity: 0;
}
.site-header.on-light .brand-logo__image--dark {
  opacity: 1;
}
.site-header.on-light .brand-name {
  color: var(--l-ink);
}
.site-header.on-light .nav-glass {
  background: rgba(255, 255, 255, 0.72);
  border-color: rgba(0, 0, 0, 0.06);
  box-shadow: var(--shadow-nav-glass);
}
.site-header.on-light .nav-glass > a,
.site-header.on-light .nav-trigger {
  color: #3a3a3c;
}
.site-header.on-light .nav-glass > a:hover,
.site-header.on-light .nav-trigger:hover,
.site-header.on-light .nav-trigger:active {
  color: #000;
  background: rgba(0, 0, 0, 0.06);
}
.site-header.on-light .btn-sm.btn-ghost {
  background: rgba(255, 255, 255, 0.72);
  border-color: rgba(0, 0, 0, 0.06);
  box-shadow:
    0 8px 24px rgba(0, 0, 0, 0.14),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);
  color: var(--l-ink);
}
.site-header.on-light .btn-sm.btn-primary {
  background: var(--l-ink);
  border-color: var(--l-ink);
  color: #fff;
}
.site-header.on-light .mobile-toggle {
  border-color: var(--l-line);
  background: transparent;
}
.site-header.on-light .mobile-toggle > span:not(.sr-only) {
  background: var(--l-ink);
}

/* BUTTONS */
.btn-sm {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 3px;
  font-size: var(--fs-sm);
  font-weight: 500;
  height: 38px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  white-space: nowrap;
  min-width: 96px;
  transition:
    background 0.55s cubic-bezier(0.4, 0, 0.2, 1),
    border-color 0.55s cubic-bezier(0.4, 0, 0.2, 1),
    color 0.55s cubic-bezier(0.4, 0, 0.2, 1);
}
.btn-sm.btn-primary {
  background: #fff;
  color: #000;
  border-color: #fff;
}
.btn-sm.btn-primary:hover {
  background: #e5e5ea;
  border-color: #e5e5ea;
}
.btn-sm.btn-ghost {
  background: rgba(28, 28, 30, 0.55);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-color: rgba(255, 255, 255, 0.12);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
  color: #e5e5ea;
}
.btn-sm.btn-ghost:hover {
  background: rgba(40, 40, 42, 0.65);
  border-color: rgba(255, 255, 255, 0.2);
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  font-size: var(--fs-body);
  font-weight: 500;
  height: 48px;
  padding: 0 24px;
  border-radius: 999px;
  border: 1px solid transparent;
  white-space: nowrap;
  transition:
    background 0.18s,
    border-color 0.18s,
    color 0.18s;
}
.btn-primary {
  background: #fff;
  color: #000;
  border-color: #fff;
}
.btn-primary:hover {
  background: #e5e5ea;
  border-color: #e5e5ea;
}