:root {
  --component-icon-size: 44px;
  --component-fab-width: 292px;
}

.tab-shell {
  min-width: 0;
}

.tab-list {
  display: flex;
  max-width: 100%;
  gap: 6px;
  padding: 6px;
  overflow-x: auto;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-panel);
  color: var(--color-ink);
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.tab-list [role="tab"] {
  min-height: 42px;
  flex: 1 0 auto;
  padding: 9px 18px;
  border: 0;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--color-ink-muted);
  font-size: 14px;
  font-weight: 650;
  white-space: nowrap;
}

.tab-list [role="tab"]:hover {
  color: var(--color-ink);
}

.tab-list [role="tab"][aria-selected="true"],
.tab-list [role="tab"].is-active {
  background: var(--color-page);
  color: var(--color-ink);
  box-shadow: 0 1px 5px var(--color-shadow-soft);
}

.tab-panel {
  padding-top: 28px;
}

.tab-panel[hidden] {
  display: none;
}

.jump-nav {
  position: sticky;
  top: 12px;
  z-index: 20;
  display: flex;
  max-width: 100%;
  gap: 8px;
  padding: 8px;
  overflow-x: auto;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-page);
  color: var(--color-ink);
  box-shadow: var(--shadow-card);
  -webkit-overflow-scrolling: touch;
}

.jump-nav a {
  display: inline-flex;
  min-height: 40px;
  flex: 0 0 auto;
  align-items: center;
  padding: 8px 15px;
  border-radius: var(--radius-pill);
  color: var(--color-ink-muted);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
}

.jump-nav a:hover,
.jump-nav a.is-current {
  background: var(--color-panel);
  color: var(--color-brand-deep);
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-item {
  overflow: clip;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background: var(--color-page);
  color: var(--color-ink);
}

.faq-item summary {
  position: relative;
  display: block;
  min-height: 60px;
  padding: 19px 56px 19px 22px;
  cursor: pointer;
  color: var(--color-ink);
  font-weight: 680;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  position: absolute;
  top: 50%;
  right: 22px;
  width: 22px;
  height: 22px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  color: var(--color-ink-muted);
  content: "+";
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 20px;
  text-align: center;
  transform: translateY(-50%);
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-answer {
  padding: 0 22px 20px;
  color: var(--color-ink-muted);
}

.faq-answer > :last-child {
  margin-bottom: 0;
}

.term-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.term-card {
  padding: 24px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background: var(--color-page);
  color: var(--color-ink);
  box-shadow: 0 2px 6px var(--color-shadow-faint);
}

.term-card dt {
  margin-bottom: 8px;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 750;
}

.term-card dd {
  margin: 0;
  color: var(--color-ink-muted);
  line-height: 1.75;
}

.client-card {
  padding: 28px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-panel);
  background: var(--color-page);
  color: var(--color-ink);
  box-shadow: var(--shadow-card);
}

.client-card-head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.client-card-head img {
  width: 56px;
  height: 56px;
  flex: 0 0 auto;
}

.client-card-title {
  min-width: 0;
  flex: 1 1 auto;
}

.client-card-title h3 {
  margin-bottom: 4px;
}

.client-card-title p {
  margin-bottom: 0;
  color: var(--color-ink-muted);
  font-size: 14px;
}

.client-actions {
  display: flex;
  gap: 10px;
  margin-top: 22px;
  flex-wrap: wrap;
}

.client-actions .button {
  flex: 1 1 180px;
}

.badge-row,
.chip-row {
  display: flex;
  align-items: center;
  gap: 9px;
  flex-wrap: wrap;
}

.badge {
  display: inline-flex;
  min-height: 28px;
  max-width: 100%;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-panel);
  color: var(--color-ink-muted);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.35;
}

.badge::before {
  width: 6px;
  height: 6px;
  flex: 0 0 auto;
  border-radius: var(--radius-pill);
  background: var(--color-ink-soft);
  content: "";
}

.badge-primary {
  border-color: var(--color-line-focus);
  background: var(--color-panel);
  color: var(--color-brand-deep);
}

.badge-primary::before {
  background: var(--color-brand);
}

.badge-recommended {
  border-color: var(--color-line-focus);
  background: var(--color-success-bg);
  color: var(--color-success);
}

.badge-recommended::before {
  background: var(--color-success);
}

.badge-retired {
  background: var(--color-danger-bg);
  color: var(--color-danger);
}

.badge-retired::before {
  background: var(--color-danger);
}

.badge-warning {
  background: var(--color-warning-bg);
  color: var(--color-warning);
}

.badge-warning::before {
  background: var(--color-warning);
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.article-card {
  display: flex;
  min-height: 100%;
  flex-direction: column;
  padding: 26px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background: var(--color-page);
  color: var(--color-ink);
  text-decoration: none;
  box-shadow: 0 2px 6px var(--color-shadow-faint);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.article-card:hover {
  color: var(--color-ink);
  box-shadow: var(--shadow-card);
  transform: translateY(-3px);
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 18px;
  color: var(--color-ink-muted);
  font-size: 12px;
}

.article-card h3 {
  margin-bottom: 12px;
  font-size: 20px;
}

.article-card p {
  margin-bottom: 22px;
  color: var(--color-ink-muted);
}

.article-more {
  margin-top: auto;
  color: var(--color-brand-deep);
  font-size: 14px;
  font-weight: 700;
}

.callout {
  position: relative;
  margin: 26px 0;
  padding: 20px 22px 20px 50px;
  border: 1px solid var(--color-line-focus);
  border-radius: var(--radius-control);
  background: var(--color-panel);
  color: var(--color-ink);
}

.callout::before {
  position: absolute;
  top: 22px;
  left: 22px;
  width: 10px;
  height: 10px;
  border-radius: var(--radius-pill);
  background: var(--gradient-brand);
  content: "";
}

.callout strong {
  display: block;
  margin-bottom: 4px;
}

.callout > :last-child {
  margin-bottom: 0;
}

.callout-success {
  border-color: var(--color-success);
  background: var(--color-success-bg);
  color: var(--color-ink);
}

.callout-success::before {
  background: var(--color-success);
}

.callout-warning {
  border-color: var(--color-warning);
  background: var(--color-warning-bg);
  color: var(--color-ink);
}

.callout-warning::before {
  background: var(--color-warning);
}

.download-guide-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 24px;
  margin-top: 48px;
  padding: 28px;
  border: 1px solid var(--color-line-focus);
  border-radius: var(--radius-panel);
  background: var(--color-panel);
  color: var(--color-ink);
  box-shadow: var(--shadow-card);
}

.download-guide-card p {
  margin-bottom: 0;
  color: var(--color-ink-muted);
}

.dl-fab {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 40;
  display: flex;
  width: min(var(--component-fab-width), calc(100vw - 32px));
  min-height: 72px;
  align-items: center;
  gap: 13px;
  padding: 13px 18px;
  border: 1px solid var(--color-line-focus);
  border-radius: var(--radius-card);
  background: var(--color-page);
  color: var(--color-ink);
  text-decoration: none;
  box-shadow: var(--shadow-deep);
}

.dl-fab:hover {
  color: var(--color-ink);
  transform: translateY(-2px);
}

.dl-fab-icon {
  display: inline-flex;
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-control);
  background: var(--gradient-brand);
  color: var(--color-white);
}

.dl-fab-icon svg {
  width: 20px;
  height: 20px;
}

.dl-fab-copy {
  min-width: 0;
}

.dl-fab-copy strong,
.dl-fab-copy span {
  display: block;
}

.dl-fab-copy strong {
  color: var(--color-ink);
  font-size: 14px;
}

.dl-fab-copy span {
  color: var(--color-ink-muted);
  font-size: 12px;
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px 52px;
}

.feature-row {
  display: grid;
  grid-template-columns: var(--component-icon-size) minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.feature-icon {
  display: inline-flex;
  width: var(--component-icon-size);
  height: var(--component-icon-size);
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-control);
  background: var(--gradient-brand);
  color: var(--color-white);
  box-shadow: var(--shadow-button);
}

.feature-icon svg {
  width: 22px;
  height: 22px;
}

.feature-row h3 {
  margin-bottom: 6px;
  font-size: 18px;
}

.feature-row p {
  margin-bottom: 0;
  color: var(--color-ink-muted);
  font-size: 14px;
}

.app-window {
  overflow: clip;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-panel);
  background: var(--color-page);
  color: var(--color-ink);
  box-shadow: var(--shadow-deep);
}

.window-bar {
  display: flex;
  min-height: 48px;
  align-items: center;
  gap: 8px;
  padding: 0 18px;
  border-bottom: 1px solid var(--color-line);
  background: var(--color-panel);
  color: var(--color-ink-muted);
}

.window-dot {
  width: 9px;
  height: 9px;
  flex: 0 0 auto;
  border-radius: var(--radius-pill);
  background: var(--color-line-hover);
}

.window-dot.is-brand {
  background: var(--color-brand);
}

.window-title {
  margin-left: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
}

.window-body {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  min-height: 280px;
}

.window-sidebar {
  padding: 18px 12px;
  border-right: 1px solid var(--color-line);
  background: var(--color-panel);
  color: var(--color-ink-muted);
}

.window-menu-item {
  padding: 9px 12px;
  border-radius: var(--radius-small);
  font-size: 13px;
}

.window-menu-item.is-active {
  background: var(--color-page);
  color: var(--color-ink);
  font-weight: 650;
}

.window-main {
  min-width: 0;
  padding: 20px;
}

.window-table-head,
.window-table-row {
  display: grid;
  grid-template-columns: 1.2fr 1fr 0.8fr;
  gap: 12px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--color-line);
  font-size: 12px;
}

.window-table-head {
  color: var(--color-ink-muted);
  font-weight: 700;
}

.window-table-row {
  color: var(--color-ink);
}

.window-status {
  padding: 9px 18px;
  border-top: 1px solid var(--color-line);
  background: var(--color-panel);
  color: var(--color-ink-muted);
  font-family: var(--font-mono);
  font-size: 11px;
}

.hero-platforms {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.platform-chip {
  display: inline-flex;
  min-height: 36px;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-page);
  color: var(--color-ink-muted);
  font-size: 13px;
  font-weight: 550;
  text-decoration: none;
}

.platform-chip:hover {
  border-color: var(--color-line-hover);
  color: var(--color-ink);
}

.platform-chip svg {
  width: 14px;
  height: 14px;
  flex: 0 0 auto;
}

.hero-stage {
  position: relative;
  min-height: 560px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.stripe-field,
.stripe-fade {
  position: absolute;
  top: -14px;
  right: -34px;
  width: 560px;
  height: 600px;
  pointer-events: none;
}

.stripe-field {
  background: linear-gradient(118deg, var(--color-stripe-a) 12%, var(--color-stripe-b) 88%);
  -webkit-mask-image: repeating-linear-gradient(90deg, var(--color-ink) 0 1px, transparent 1px 7px);
  mask-image: repeating-linear-gradient(90deg, var(--color-ink) 0 1px, transparent 1px 7px);
}

.stripe-fade {
  background: radial-gradient(closest-side at 52% 44%, var(--color-fade-clear) 26%, var(--color-fade-mid) 58%, var(--color-page) 82%);
}

.switch-stack {
  position: relative;
  z-index: 2;
  display: flex;
  width: 398px;
  max-width: calc(100% - 30px);
  flex-direction: column;
  gap: 16px;
}

.switch-card {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 15px;
  padding: 17px 22px 17px 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-page);
  color: var(--color-ink);
  box-shadow: var(--shadow-card);
}

.switch-name {
  min-width: 0;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 650;
}

.switch-tag {
  margin-left: auto;
  padding: 5px 11px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}

.switch-tag.is-on {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.switch-tag.is-off {
  background: var(--color-panel-strong);
  color: var(--color-ink-muted);
}

.switch-control {
  position: relative;
  width: 46px;
  height: 26px;
  flex: 0 0 auto;
  border-radius: var(--radius-pill);
  background: var(--color-switch-off);
}

.switch-control::after {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 20px;
  height: 20px;
  border-radius: var(--radius-pill);
  background: var(--color-page);
  box-shadow: 0 1px 3px var(--color-shadow-button);
  content: "";
}

.switch-control.is-on {
  background: var(--gradient-brand);
}

.switch-control.is-on::after {
  right: 3px;
  left: auto;
}

.switch-card.depth-one {
  opacity: 0.42;
  transform: translateX(46px) scale(0.96);
}

.switch-card.depth-two {
  opacity: 0.72;
  transform: translateX(18px) scale(0.985);
}

.switch-card.is-focus {
  z-index: 3;
  border-color: var(--color-line-focus);
  opacity: 1;
  box-shadow: var(--shadow-deep);
  transform: translateX(-8px) rotate(-1.5deg) scale(1.045);
}

.switch-card.is-focus .switch-control.is-on {
  background: var(--color-brand-deep);
}

.switch-card.depth-four {
  opacity: 0.62;
  transform: translateX(24px) scale(0.98);
}

.switch-card.depth-five {
  opacity: 0.36;
  transform: translateX(52px) scale(0.955);
}

@media (max-width: 768px) {
  .term-grid,
  .article-grid,
  .feature-list {
    grid-template-columns: 1fr;
  }

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

  .window-body {
    grid-template-columns: 120px minmax(0, 1fr);
  }
}

@media (max-width: 640px) {
  .jump-nav {
    top: 8px;
  }

  .client-card,
  .article-card {
    padding: 22px;
  }

  .dl-fab {
    right: 16px;
    bottom: 16px;
  }

  .window-sidebar {
    display: none;
  }

  .window-body {
    grid-template-columns: 1fr;
  }

  .hero-stage {
    min-height: 430px;
  }

  .stripe-field,
  .stripe-fade {
    top: 0;
    right: -150px;
    width: 510px;
    height: 450px;
  }

  .switch-stack {
    width: calc(100% - 24px);
  }

  .switch-card {
    gap: 10px;
    padding: 14px 15px;
  }

  .switch-name {
    font-size: 13px;
  }

  .switch-tag {
    padding-inline: 8px;
    font-size: 10px;
  }

  .switch-card.depth-one,
  .switch-card.depth-two,
  .switch-card.is-focus,
  .switch-card.depth-four,
  .switch-card.depth-five {
    transform: none;
  }
}