/* Nav, buttons, form, drawer, footer — dark enterprise */

.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 120;
  background: transparent;
  border: none;
  pointer-events: none;
}

.site-header > * { pointer-events: auto; }

.nav-island-wrap {
  position: relative;
  z-index: 3;
  padding: 12px clamp(16px, 4vw, 48px) 0;
  display: flex;
  justify-content: center;
}

.nav-island-wrap > [data-partial],
.nav-island-wrap > div {
  width: 100%;
  max-width: var(--nav-max-w);
  display: flex;
  justify-content: center;
}

.nav-wrap {
  --nav-edge-inset: 8px;
  position: relative;
  container-type: inline-size;
  container-name: main-nav;
  width: 100%;
  max-width: var(--nav-max-w);
  height: var(--nav-h);
  flex-shrink: 0;
  background: var(--nav-glass);
  border: 1px solid var(--nav-glass-border);
  border-radius: var(--pill);
  backdrop-filter: blur(12px) saturate(1.35);
  -webkit-backdrop-filter: blur(12px) saturate(1.35);
  box-shadow: var(--shadow-nav);
  isolation: isolate;
  overflow: hidden;
  transition: background 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease, backdrop-filter 0.35s ease;
}

.nav-wrap.has-dropdown-open {
  overflow: visible;
}

.nav-wrap::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.1) 0%, transparent 42%),
    radial-gradient(ellipse 80% 120% at 50% -20%, rgba(255, 255, 255, 0.08), transparent 55%);
  opacity: 0.9;
}

.site-header.scrolled .nav-wrap {
  background: var(--nav-glass-scrolled);
  border-color: var(--nav-glass-border);
  backdrop-filter: blur(16px) saturate(1.4);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  box-shadow: var(--shadow-nav);
}

.nav-wrap .nav.container {
  max-width: none;
  width: 100%;
  height: 100%;
  /* 右侧 inset 与 CTA 上下留白一致，形成嵌套胶囊 */
  padding: 0 var(--nav-edge-inset) 0 clamp(16px, 2.2vw, 24px);
}

.nav {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  height: 100%;
  gap: 8px;
}

.nav-logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  line-height: 0;
  z-index: 1;
  justify-self: start;
}

.nav-logo-img {
  height: 20px;
  width: auto;
  max-width: min(200px, 40vw);
  object-fit: contain;
  filter: var(--logo-filter);
  transition: filter 0.25s ease;
}

.nav-logo-mark {
  width: 28px;
  height: 28px;
  border-radius: 3px;
  flex-shrink: 0;
}

.nav-logo-text {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text);
}

.nav-links {
  position: static;
  left: auto;
  top: auto;
  transform: none;
  display: flex;
  align-items: center;
  justify-content: center;
  justify-self: center;
  gap: clamp(28px, 4.5vw, 56px);
}

/* 保证主链接触发器始终高于子菜单/桥接层，避免被挡住无法点击 */
.nav-links > a,
.nav-dropdown-trigger {
  position: relative;
  z-index: 100;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  z-index: 1;
  justify-self: end;
}

.nav-links a {
  position: relative;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--text-2);
  padding: 6px 10px;
  border-radius: 8px;
  white-space: nowrap;
  transition: color 0.15s ease, background 0.15s ease;
}

.nav-item--dropdown {
  position: static;
  /* 向下扩展命中区，覆盖触发器与面板之间的空隙 */
  padding-bottom: 18px;
  margin-bottom: -18px;
}

.nav-dropdown-trigger {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font: inherit;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--text-2);
  padding: 6px 10px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  cursor: pointer;
  white-space: nowrap;
  outline: none;
  box-shadow: none;
  transition: color 0.15s ease, background 0.15s ease;
}

.nav-dropdown-trigger:hover,
.nav-item--dropdown.is-open .nav-dropdown-trigger,
.nav-dropdown-trigger.is-active {
  color: var(--text);
  background: var(--hover-fill);
}

.nav-dropdown-trigger:focus-visible {
  color: var(--text);
  background: var(--hover-fill);
}

.nav-dropdown-caret {
  opacity: 0.7;
  transition: transform 0.18s ease;
}

.nav-item--dropdown.is-open .nav-dropdown-caret,
.drawer-group.is-open .nav-dropdown-caret {
  transform: rotate(180deg);
}

/* Submenu panel: fully opaque fill, frost blur aligned with main nav feel */
.nav-dropdown {
  --nav-panel-ease: cubic-bezier(0.22, 1, 0.36, 1);
  position: absolute;
  top: calc(100% + 4px);
  left: 50%;
  z-index: 80;
  width: 70%;
  max-width: 70%;
  width: 70cqw;
  max-width: 70cqw;
  min-width: 0;
  padding: 14px 14px 12px;
  border-radius: 18px;
  border: 1px solid var(--nav-glass-border);
  /* Opaque fill — skip heavy backdrop-filter (main hover jank source). */
  background: var(--panel-bg);
  box-shadow:
    var(--shadow-nav),
    0 24px 64px rgba(15, 23, 42, 0.16),
    inset 0 1px 0 var(--panel-inset);
  isolation: isolate;
  overflow: visible;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateX(-50%) translateY(-10px);
  transform-origin: top center;
  transition:
    opacity 0.14s ease,
    transform 0.18s var(--nav-panel-ease),
    visibility 0s linear 0.18s,
    background 0.25s ease,
    border-color 0.25s ease,
    box-shadow 0.25s ease;
}

.nav-item--dropdown.is-open .nav-dropdown,
.nav-dropdown.is-armed {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
  transition:
    opacity 0.12s ease,
    transform 0.18s var(--nav-panel-ease),
    visibility 0s linear 0s,
    background 0.25s ease,
    border-color 0.25s ease,
    box-shadow 0.25s ease;
}

/* Hover bridge — 只补触发器与面板之间的竖向空隙，不盖住相邻导航项 */
.nav-dropdown::before {
  content: '';
  position: absolute;
  left: 8%;
  right: 8%;
  top: -10px;
  height: 14px;
  z-index: 1;
  pointer-events: auto;
}

/* Soft top sheen — match .nav-wrap::before */
.nav-dropdown::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  z-index: 0;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.1) 0%, transparent 42%),
    radial-gradient(ellipse 80% 120% at 50% -20%, rgba(255, 255, 255, 0.08), transparent 55%);
  opacity: 0.9;
}

.nav-dropdown > * {
  position: relative;
  z-index: 2;
  pointer-events: auto;
}

.site-header.scrolled .nav-dropdown {
  background: var(--panel-bg-scrolled);
  border-color: var(--nav-glass-border);
  box-shadow:
    var(--shadow-nav),
    0 28px 72px rgba(15, 23, 42, 0.18),
    inset 0 1px 0 var(--panel-inset);
}

/* Products — wider 3-up panel */
.nav-dropdown.nav-panel:not(.nav-mega) {
  width: min(680px, 85%);
  max-width: 85%;
  width: min(680px, 85cqw);
  max-width: 85cqw;
  padding: 10px;
  border-radius: 16px;
}

.nav-panel-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.nav-panel-col {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
  padding: 10px 8px 8px;
  border-radius: 12px;
}

.nav-panel-col > .nav-panel-kicker {
  padding: 0 4px 6px;
}

.nav-panel-card {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 0;
  padding: 14px 12px 12px;
  border-radius: 12px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text);
  text-decoration: none;
  overflow: hidden;
  transition:
    background 0.3s ease,
    border-color 0.3s ease,
    box-shadow 0.4s var(--nav-panel-ease, cubic-bezier(0.22, 1, 0.36, 1)),
    transform 0.4s var(--nav-panel-ease, cubic-bezier(0.22, 1, 0.36, 1));
}

.nav-panel-card--nested {
  padding: 10px 8px;
  gap: 4px;
}

.nav-panel-card::before {
  content: none;
}

.nav-panel-card:hover,
.nav-panel-card.is-active {
  background: var(--hover-fill);
  border-color: var(--border);
  box-shadow: none;
}

.nav-panel-card:hover::before,
.nav-panel-card.is-active::before {
  opacity: 0;
}

.nav-item--dropdown.is-open .nav-panel-card:hover {
  transform: translateY(-4px);
}

.nav-panel-kicker,
.nav-panel-card .nav-dd-title,
.nav-panel-card .nav-dd-desc {
  position: relative;
  z-index: 1;
}

.nav-panel-kicker {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--accent);
}

:lang(en) .nav-panel-kicker {
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-panel-card .nav-dd-title {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--text);
}

.nav-panel-card .nav-dd-desc {
  font-size: 11px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--text-3);
}

.nav-dd-title {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
}

.nav-dd-desc {
  font-size: 11px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--text-3);
}

/* Cases mega — larger thumbs, softer radius */
.nav-item--mega .nav-mega {
  padding: 12px 12px 10px;
}

.nav-mega-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 12px;
}

.nav-mega-card {
  position: relative;
  z-index: 3;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
  text-decoration: none;
  color: var(--text);
  cursor: pointer;
  pointer-events: auto;
  -webkit-tap-highlight-color: transparent;
  transition: transform 0.35s var(--nav-panel-ease, cubic-bezier(0.22, 1, 0.36, 1));
}

.nav-item--dropdown.is-open .nav-mega-card:hover {
  transform: translateY(-4px);
}

.nav-mega-thumb {
  position: relative;
  display: block;
  aspect-ratio: 4 / 3;
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--card-border);
  background: var(--surface-2);
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.12);
  transition:
    border-color 0.3s ease,
    box-shadow 0.4s var(--nav-panel-ease, cubic-bezier(0.22, 1, 0.36, 1)),
    transform 0.4s var(--nav-panel-ease, cubic-bezier(0.22, 1, 0.36, 1));
}

.nav-mega-thumb::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, transparent 45%, rgba(0, 0, 0, 0.5) 100%);
  opacity: 0.65;
  transition: opacity 0.35s ease;
}

.nav-mega-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition:
    transform 0.55s var(--nav-panel-ease, cubic-bezier(0.22, 1, 0.36, 1)),
    filter 0.35s ease;
}

.nav-mega-card:hover .nav-mega-thumb,
.nav-mega-card.is-active .nav-mega-thumb {
  border-color: var(--card-border-hover);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.16);
  transform: scale(1.02);
}

.nav-mega-card:hover .nav-mega-thumb::after,
.nav-mega-card.is-active .nav-mega-thumb::after {
  opacity: 0.3;
}

.nav-mega-card:hover .nav-mega-thumb img {
  transform: scale(1.08);
  filter: brightness(1.08) saturate(1.05);
}

.nav-mega-label {
  display: block;
  padding: 0 2px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text-2);
  text-align: center;
  transition: color 0.25s ease;
  pointer-events: none;
}

.nav-mega-card:hover .nav-mega-label,
.nav-mega-card.is-active .nav-mega-label {
  color: var(--text);
}

.nav-item--dropdown.is-open .nav-panel-card {
  /* panel slides as one; cards stay solid */
  opacity: 1;
  transform: none;
  animation: none;
}

@keyframes navPanelCardIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.nav-mega-more {
  display: block;
  margin: 0 0 12px;
  padding: 2px 4px 12px;
  border-top: 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 12px;
  font-weight: 600;
  color: rgba(245, 245, 247, 0.78);
  text-decoration: none;
  cursor: pointer;
  pointer-events: auto;
  position: relative;
  z-index: 3;
  transition: color 0.2s ease;
}

.nav-item--dropdown.is-open .nav-mega-more {
  opacity: 1;
  transform: translateY(0);
}

.nav-mega-more:hover {
  color: var(--accent);
  background: transparent;
  letter-spacing: 0.01em;
}

@media (prefers-reduced-motion: reduce) {
  .nav-dropdown,
  .nav-mega-card,
  .nav-mega-more,
  .nav-panel-card,
  .nav-mega-thumb,
  .nav-mega-thumb img {
    transition-duration: 0.01ms !important;
    animation: none !important;
  }

  .nav-item--dropdown.is-open .nav-dropdown {
    transform: translateX(-50%) translateY(0) !important;
  }

  .nav-item--dropdown:not(.is-open) .nav-dropdown {
    opacity: 0 !important;
    visibility: hidden !important;
  }
}

.nav-links a:hover {
  color: var(--text);
  background: var(--hover-fill);
}

.nav-links a.is-active {
  color: var(--text);
  background: var(--hover-fill-strong);
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--text-3);
}

.lang-switch a {
  color: var(--text-3);
  text-decoration: none;
  padding: 4px 2px;
  transition: color 0.15s ease;
}

.lang-switch a:hover,
.lang-switch a.is-active {
  color: var(--text);
}

.lang-switch-sep {
  opacity: 0.45;
  user-select: none;
}

.lang-switch--drawer {
  margin: 8px 10px 4px;
  padding: 8px 0;
}

.nav-toggle {
  display: none;
  width: calc(var(--nav-h) - var(--nav-edge-inset) * 2);
  height: calc(var(--nav-h) - var(--nav-edge-inset) * 2);
  align-items: center;
  justify-content: center;
  border-radius: var(--pill);
  color: var(--text);
  transition: background 0.15s ease;
}

.nav-toggle:hover { background: var(--hover-fill); }

/* Theme toggle — sun in dark mode, moon in light mode */
.theme-toggle {
  width: 32px;
  height: 32px;
  border-radius: var(--pill);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-2);
  background: transparent;
  border: 1px solid transparent;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
  flex-shrink: 0;
}

.theme-toggle:hover {
  color: var(--text);
  background: var(--hover-fill);
}

.theme-toggle .theme-icon {
  display: none;
}

html[data-theme="light"] .theme-toggle .theme-icon--moon,
html:not([data-theme]) .theme-toggle .theme-icon--moon {
  display: block;
}

html[data-theme="dark"] .theme-toggle .theme-icon--sun {
  display: block;
}

/* ── Buttons — solid, quiet ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.01em;
  padding: 12px 22px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: transform 0.15s ease, background 0.15s ease, opacity 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.btn:active { transform: scale(0.985); }

.btn.btn-pill,
.btn-pill {
  border-radius: var(--pill);
  padding: 10px 22px;
}

.btn.primary,
.btn-pill.primary {
  background: var(--btn-primary-bg);
  color: var(--btn-primary-fg);
  border-color: transparent;
  box-shadow: none;
}

.btn.primary:hover,
.btn-pill.primary:hover {
  background: var(--btn-primary-bg);
  color: var(--btn-primary-fg);
  transform: translateY(-1px);
  opacity: 0.94;
  box-shadow: var(--btn-primary-shadow);
}

.btn.ghost,
.btn-pill.ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--btn-ghost-border);
  box-shadow: none;
}

.btn.ghost:hover,
.btn-pill.ghost:hover {
  background: var(--btn-ghost-hover-bg);
  border-color: var(--border-strong);
  color: var(--text);
  transform: translateY(-1px);
  box-shadow: none;
  opacity: 1;
}

.btn.sm,
.btn-pill.sm {
  font-size: 12.5px;
  padding: 7px 16px;
  letter-spacing: -0.005em;
}

.nav-right .btn-pill.sm {
  height: calc(var(--nav-h) - var(--nav-edge-inset) * 2);
  padding: 0 16px;
  box-sizing: border-box;
}

.nav-right .btn-pill.sm:hover {
  transform: none;
}

/* ── Mobile drawer ── */
.mobile-drawer {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: var(--overlay-scrim);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s, visibility 0.25s;
}

.mobile-drawer.open {
  opacity: 1;
  visibility: visible;
}

.mobile-panel {
  position: absolute;
  top: 0; right: 0;
  width: min(300px, 86vw);
  height: 100%;
  background: var(--surface);
  border-left: 1px solid var(--border);
  padding: 72px 24px 32px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  transform: translateX(16px);
  transition: transform 0.25s;
}

.mobile-drawer.open .mobile-panel { transform: none; }

.mobile-panel a {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-2);
  padding: 14px 0;
  border-radius: 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: color 0.15s ease;
}

.mobile-panel a:hover { background: transparent; color: var(--text); }

.drawer-group {
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.drawer-group-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font: inherit;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-2);
  background: transparent;
  border: 0;
  padding: 14px 0;
  cursor: pointer;
  text-align: left;
}

.drawer-group-trigger.is-active,
.drawer-group.is-open .drawer-group-trigger {
  color: var(--text);
}

.drawer-submenu {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 0 0 12px;
}

.drawer-submenu a {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 12px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.03);
}

.drawer-submenu a:hover {
  background: rgba(61, 168, 255, 0.12);
  color: var(--text);
}

.mobile-panel .drawer-cta {
  margin-top: 20px;
  text-align: center;
  background: #fff;
  color: #0a0a0a;
  border-radius: var(--pill);
  border-bottom: none;
  font-weight: 600;
  padding: 12px 16px;
  transition: opacity 0.15s ease;
}

.mobile-panel .drawer-cta:hover {
  color: #0a0a0a;
  background: #fff;
  opacity: 0.92;
}

/* ── Form ── */
.cta-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: clamp(24px, 3vw, 32px);
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field label {
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: none;
  color: var(--text-3);
}

.field input,
.field textarea {
  font-family: inherit;
  font-size: 16px;
  letter-spacing: -0.011em;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border-mute);
  border-radius: var(--radius-sm);
  padding: 11px 14px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.field textarea {
  min-height: 108px;
  resize: vertical;
  line-height: 1.5;
}

.field input:focus,
.field textarea:focus {
  border-color: rgba(255, 255, 255, 0.28);
  box-shadow: none;
}

.field input.is-invalid,
.field textarea.is-invalid {
  border-color: #E05A4A;
}

.form-hint {
  font-size: 12px;
  color: var(--text-3);
  line-height: 1.5;
}

.form-status {
  font-size: 13px;
  color: var(--accent);
  min-height: 1.2em;
}

/* ── Footer — Apple-style directory ── */
.site-footer,
footer {
  position: relative;
  background:
    linear-gradient(180deg, transparent 0%, var(--footer-bg) 56px),
    var(--footer-bg);
  border-top: none;
  padding: 0 clamp(16px, 4vw, 48px) 18px;
  color: var(--footer-muted);
}

/* 承接上一区块的平滑沉入，消除硬分割线 */
.site-footer::before,
footer::before {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: -48px;
  height: 48px;
  pointer-events: none;
  background: linear-gradient(
    180deg,
    transparent 0%,
    var(--footer-fade) 45%,
    var(--footer-bg) 100%
  );
  z-index: 0;
}

.footer-inner {
  position: relative;
  z-index: 1;
  /* 与常驻页眉导航岛同宽，分割线对齐 */
  max-width: var(--nav-max-w);
  width: 100%;
  padding: clamp(28px, 4vw, 40px) 0 0;
  margin-left: auto;
  margin-right: auto;
  box-sizing: border-box;
}

.footer-top {
  --footer-brand-h: 18px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 0;
  padding-bottom: 16px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--footer-line);
}

.footer-logo {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  text-decoration: none;
  opacity: 0.88;
  transition: opacity 0.2s ease;
}

.footer-logo:hover {
  opacity: 1;
}

.footer-brand-text,
.footer-tagline,
#footer-tagline {
  margin: 0;
  font-size: var(--footer-brand-h);
  font-weight: 400;
  line-height: var(--footer-brand-h);
  letter-spacing: 1.05em;
  color: var(--footer-fg);
  opacity: 0.88;
  max-width: none;
  white-space: nowrap;
  flex-shrink: 0;
}

.footer-logo .footer-brand-text {
  opacity: 1;
}

.footer-brand-sep {
  flex-shrink: 0;
  margin: 0 0.55em;
  font-size: var(--footer-brand-h);
  line-height: var(--footer-brand-h);
  color: var(--footer-fg);
  opacity: 0.45;
}

/* 抵消 letter-spacing 在末字后多出的空隙 */
.footer-brand-text::after,
.footer-tagline::after,
#footer-tagline::after {
  content: '';
  margin-left: -1.05em;
}

html[lang="en"] .footer-brand-text,
html[lang="en"] .footer-tagline,
html[lang="en"] #footer-tagline {
  letter-spacing: 0.04em;
  font-size: var(--footer-brand-h);
  line-height: var(--footer-brand-h);
}

html[lang="en"] .footer-brand-text::after,
html[lang="en"] .footer-tagline::after,
html[lang="en"] #footer-tagline::after {
  margin-left: -0.04em;
}

.footer-directory {
  padding-bottom: 22px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--footer-line);
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px 20px;
  align-items: start;
}

.footer-col {
  min-width: 0;
}

.footer-col-title,
.footer-col h4 {
  margin: 0 0 12px;
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.33337;
  letter-spacing: -0.01em;
  text-transform: none;
  color: var(--footer-fg);
}

.footer-col-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.footer-col-list a,
.footer-col a {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  line-height: 1.33337;
  letter-spacing: -0.01em;
  color: var(--footer-muted);
  padding: 0;
  transition: color 0.2s ease;
}

.footer-col-list a:hover,
.footer-col a:hover {
  color: var(--footer-fg);
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-top: 0;
  margin-top: 0;
  border-top: none;
  font-family: var(--sans);
}

.footer-bottom-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
}

.footer-bottom-links {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 0;
  flex: 0 1 auto;
  max-width: 100%;
}

.footer-bottom-links .footer-legal:not(:empty) + .footer-beian:not(:empty)::before,
.footer-bottom-links .footer-beian:not(:empty) + .footer-legal:not(:empty)::before {
  content: '|';
  margin: 0 14px;
  color: var(--footer-sep);
  font-weight: 400;
  pointer-events: none;
}

.footer-copy {
  font-size: 12px;
  font-weight: 400;
  line-height: 1.33337;
  letter-spacing: -0.01em;
  color: var(--footer-dim);
  margin: 0;
  flex: 1 1 auto;
  min-width: 0;
}

.footer-legal {
  display: inline-flex;
  flex-wrap: nowrap;
  align-items: center;
  gap: 0;
  flex-shrink: 0;
}

.footer-legal a {
  font-size: 12px;
  font-weight: 400;
  color: var(--footer-muted);
  transition: color 0.2s ease;
  white-space: nowrap;
}

.footer-legal a:hover {
  color: var(--footer-fg);
}

.footer-legal-sep {
  margin: 0 10px;
  color: var(--footer-sep);
  font-size: 12px;
}

.footer-beian {
  display: inline-flex;
  flex-wrap: nowrap;
  align-items: center;
  justify-content: flex-start;
  gap: 6px 8px;
  width: auto;
  max-width: max-content;
  margin: 0;
  padding: 0;
  border-top: none;
  text-align: left;
  flex: 0 1 auto;
}

.footer-beian-icon {
  width: 14px;
  height: 14px;
  object-fit: contain;
  flex-shrink: 0;
  display: block;
  opacity: 0.7;
}

.footer-beian-link {
  font-size: 11px;
  line-height: 1.2;
  letter-spacing: -0.006em;
  color: var(--footer-dim);
  transition: color 0.2s ease;
}

.footer-beian-link:hover {
  color: var(--footer-muted);
}

.footer-beian-sep {
  color: var(--footer-sep);
  font-size: 11px;
  line-height: 1;
}