.hero-preview {
  position: relative;
  overflow-x: clip;
  background:
    radial-gradient(760px 420px at 66% 8%, var(--color-page-glow), transparent),
    var(--color-page);
  color: var(--color-ink);
  padding-top: 30px;
  padding-bottom: 26px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 46fr) minmax(0, 54fr);
  align-items: center;
  gap: 34px;
}

.hero-copy,
.hero-device {
  min-width: 0;
}

.client-chips,
.platform-row,
.fact-row,
.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.client-chips {
  margin-bottom: 22px;
}

.client-chips li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: 6px 14px;
  color: var(--color-ink);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
}

.client-chips li:nth-child(1) {
  background: var(--color-pink-soft);
}

.client-chips li:nth-child(2) {
  background: var(--color-blue-soft);
}

.client-chips li:nth-child(3) {
  background: var(--color-orange-soft);
}

.client-chips li:nth-child(1) .chip-dot {
  background: var(--color-accent);
}

.client-chips li:nth-child(2) .chip-dot {
  background: var(--color-cyan-deep);
}

.client-chips li:nth-child(3) .chip-dot {
  background: var(--color-orange);
}

.hero-preview h1 {
  margin-bottom: 14px;
}

.hero-title-subline {
  display: block;
  margin-top: 6px;
  color: var(--color-ink-soft);
  font-size: 0.82em;
  font-weight: 700;
  letter-spacing: 0;
}

.hero-description {
  max-width: 570px;
  margin-bottom: 24px;
  color: var(--color-muted);
  font-size: 0.97rem;
  line-height: 1.75;
}

.hero-description strong {
  color: var(--color-accent-deep);
  font-weight: 700;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 24px;
}

.platform-row a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  color: var(--color-muted);
  padding: 8px 13px;
  font-size: 0.8rem;
  font-weight: 650;
  text-decoration: none;
}

.platform-row a:hover {
  border-color: var(--color-accent);
  color: var(--color-ink);
}

.platform-row svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  fill: currentColor;
}

.hero-device {
  position: relative;
}

.hero-device::before {
  position: absolute;
  inset: 4% 2% 0;
  border-radius: var(--radius-large);
  background: radial-gradient(50% 48% at 48% 52%, var(--color-blue-soft), transparent);
  content: "";
  pointer-events: none;
}

.hero-device svg {
  position: relative;
  width: 100%;
  height: auto;
}

.device-shadow {
  fill: var(--color-shadow);
  opacity: 0.2;
  filter: blur(13px);
}

.board-left {
  fill: var(--color-board-left);
}

.board-right {
  fill: var(--color-board-right);
}

.board-top {
  fill: var(--color-surface);
  stroke: var(--color-border);
  stroke-width: 1.5;
}

.device-grid-line {
  fill: none;
  stroke: var(--color-grid);
  stroke-width: 1;
}

.track-shadow {
  fill: none;
  stroke: var(--color-shadow);
  stroke-width: 14;
  stroke-linecap: round;
  opacity: 0.2;
  filter: blur(4px);
}

.track-glow {
  fill: none;
  stroke-width: 26;
  stroke-linecap: round;
  opacity: 0.17;
  filter: blur(7px);
}

.track-main {
  fill: none;
  stroke-width: 13;
  stroke-linecap: round;
}

.track-core {
  fill: none;
  stroke: var(--color-surface);
  stroke-width: 2.5;
  stroke-linecap: round;
  opacity: 0.55;
}

.track-cyan {
  stroke: var(--color-cyan);
}

.track-accent {
  stroke: var(--color-accent);
}

.device-junction {
  fill: var(--color-surface);
  stroke: var(--color-accent);
  stroke-width: 2;
}

.device-junction-dot {
  fill: var(--color-accent);
}

.cube-blue-top {
  fill: var(--color-cube-blue-top);
  stroke: var(--color-cube-blue-right);
}

.cube-blue-left {
  fill: var(--color-cube-blue-left);
}

.cube-blue-right {
  fill: var(--color-cube-blue-right);
}

.cube-orange-top {
  fill: var(--color-cube-orange-top);
}

.cube-orange-left {
  fill: var(--color-cube-orange-left);
}

.cube-orange-right {
  fill: var(--color-cube-orange-right);
}

.panel-face {
  fill: var(--color-pink-soft);
  fill-opacity: 0.8;
  stroke: var(--color-accent);
  stroke-width: 1.5;
}

.panel-edge {
  fill: var(--color-accent);
  opacity: 0.72;
}

.panel-rule {
  fill: none;
  stroke: var(--color-accent-deep);
  stroke-width: 1.2;
  stroke-dasharray: 3 4;
  opacity: 0.5;
}

.device-callout {
  fill: none;
  stroke: var(--color-ink);
  stroke-width: 1.1;
  opacity: 0.55;
}

.device-callout-dot {
  fill: var(--color-ink);
}

.device-label {
  fill: var(--color-ink);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
}

.device-mini-label {
  fill: var(--color-cyan-deep);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
}

.device-mini-label.accent-label {
  fill: var(--color-accent-deep);
}

.device-float-a {
  animation: device-float 3.6s ease-in-out infinite alternate;
  transform-box: fill-box;
  transform-origin: center;
}

.device-float-b {
  animation: device-float 4.2s ease-in-out -1.8s infinite alternate;
  transform-box: fill-box;
  transform-origin: center;
}

@keyframes device-float {
  to {
    transform: translateY(-5px);
  }
}

.fact-band {
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-ink);
}

.fact-band-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  padding-top: 16px;
  padding-bottom: 16px;
}

.fact-item {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 12px;
}

.fact-item + .fact-item {
  border-left: 1px solid var(--color-border);
  padding-left: 28px;
}

.fact-key {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-muted);
  font-size: 0.75rem;
  white-space: nowrap;
}

.fact-key::before {
  width: 7px;
  height: 7px;
  flex-shrink: 0;
  background: var(--color-accent);
  content: "";
}

.fact-item:nth-child(2) .fact-key::before {
  background: var(--color-cyan);
}

.fact-item:nth-child(3) .fact-key::before {
  background: var(--color-orange);
}

.fact-item:nth-child(4) .fact-key::before {
  background: var(--color-accent-deep);
}

.fact-value {
  color: var(--color-ink);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.tabs {
  min-width: 0;
}

.tab-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 14px;
}

.tab-list.four-tabs {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.tab-button {
  min-width: 0;
  min-height: 64px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-small);
  background: var(--color-surface);
  color: var(--color-muted);
  padding: 0.85rem 1rem;
  font-family: var(--font-display);
  font-size: clamp(1rem, 2vw, 1.18rem);
  font-weight: 650;
  cursor: pointer;
}

.tab-button:hover {
  color: var(--color-ink);
  border-color: var(--color-accent);
}

.tab-button[aria-selected="true"],
.tab-button.is-active {
  background: var(--color-pink-soft);
  color: var(--color-ink);
  font-weight: 800;
}

.tab-button:nth-child(2)[aria-selected="true"],
.tab-button:nth-child(2).is-active {
  background: var(--color-blue-soft);
}

.tab-button:nth-child(3)[aria-selected="true"],
.tab-button:nth-child(3).is-active {
  background: var(--color-orange-soft);
}

.tab-panel {
  min-width: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  background: var(--color-surface);
  color: var(--color-ink);
  padding: clamp(22px, 4vw, 42px);
  box-shadow: var(--shadow-card);
}

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

.workstation-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(300px, 0.95fr);
  gap: clamp(24px, 5vw, 60px);
}

.setting-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--color-border);
}

.setting-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  border-bottom: 1px solid var(--color-border);
  padding: 0.78rem 0;
  color: var(--color-ink);
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

.setting-list li::after {
  width: 8px;
  height: 8px;
  flex-shrink: 0;
  background: var(--color-cyan);
  content: "";
}

.toc {
  position: sticky;
  top: 18px;
  z-index: 10;
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  background: var(--color-surface);
  color: var(--color-ink);
  box-shadow: var(--shadow-card);
  padding: 8px;
  -webkit-overflow-scrolling: touch;
}

.toc ul {
  display: flex;
  width: max-content;
  min-width: 100%;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.toc a {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  border-radius: var(--radius-small);
  padding: 0.55rem 0.78rem;
  color: var(--color-muted);
  font-size: 0.84rem;
  text-decoration: none;
  white-space: nowrap;
}

.toc a:hover,
.toc a.is-current {
  background: var(--color-blue-soft);
  color: var(--color-ink);
}

.faq-list {
  border-top: 1px solid var(--color-border);
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-item summary {
  position: relative;
  display: flex;
  min-height: 62px;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  color: var(--color-ink);
  font-weight: 750;
  cursor: pointer;
  list-style: none;
  padding: 1rem 42px 1rem 0;
}

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

.faq-item summary::after {
  position: absolute;
  right: 8px;
  width: 22px;
  height: 22px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-small);
  color: var(--color-accent-deep);
  content: "+";
  font-family: var(--font-mono);
  line-height: 20px;
  text-align: center;
}

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

.faq-answer {
  max-width: 860px;
  padding: 0 42px 1.35rem 0;
  color: var(--color-muted);
}

.term-card {
  min-width: 0;
  border-top: 4px solid var(--color-accent);
  border-radius: var(--radius-small);
  background: var(--color-pink-soft);
  color: var(--color-ink);
  padding: 22px;
}

.term-card:nth-child(3n + 2) {
  border-top-color: var(--color-cyan);
  background: var(--color-blue-soft);
}

.term-card:nth-child(3n) {
  border-top-color: var(--color-orange);
  background: var(--color-orange-soft);
}

.term-card dt {
  margin-bottom: 0.55rem;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 800;
}

.term-card dd {
  margin: 0;
  color: var(--color-ink-soft);
}

.download-card {
  position: relative;
  min-width: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  background: var(--color-surface);
  color: var(--color-ink);
  box-shadow: var(--shadow-card);
  padding: clamp(22px, 4vw, 34px);
}

.download-card-header {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 18px;
}

.download-card-header img {
  width: 54px;
  height: 54px;
  flex-shrink: 0;
}

.download-card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.status-badge {
  display: inline-flex;
  max-width: 100%;
  align-items: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: 0.3rem 0.65rem;
  color: var(--color-ink);
  font-size: 0.72rem;
  font-weight: 750;
  line-height: 1.3;
}

.status-primary {
  background: var(--color-pink-soft);
  color: var(--color-accent-deep);
}

.status-recommended {
  background: var(--color-blue-soft);
  color: var(--color-cyan-deep);
}

.status-retired {
  background: var(--color-surface-soft);
  color: var(--color-muted);
}

.article-card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  background: var(--color-surface);
  color: var(--color-ink);
  box-shadow: var(--shadow-card);
  padding: clamp(20px, 3vw, 28px);
  text-decoration: none;
  transition: transform var(--speed-normal), border-color var(--speed-normal), box-shadow var(--speed-normal);
}

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

.article-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 1rem;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.article-card h3 {
  font-size: 1.14rem;
}

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

.article-card-more {
  margin-top: auto;
  color: var(--color-accent-deep);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
}

.callout {
  position: relative;
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-small);
  background: var(--color-pink-soft);
  color: var(--color-ink);
  padding: 1.15rem 1.25rem;
}

.callout.info {
  border-left-color: var(--color-cyan-deep);
  background: var(--color-blue-soft);
  color: var(--color-ink);
}

.callout.warning {
  border-left-color: var(--color-orange);
  background: var(--color-orange-soft);
  color: var(--color-ink);
}

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

.download-guide-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  background: var(--color-blue-soft);
  color: var(--color-ink);
  padding: clamp(22px, 4vw, 34px);
}

.dl-fab {
  position: fixed;
  right: max(16px, env(safe-area-inset-right));
  bottom: max(16px, env(safe-area-inset-bottom));
  z-index: 45;
  display: flex;
  max-width: min(310px, calc(100vw - 32px));
  align-items: center;
  gap: 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  background: var(--color-ink);
  color: var(--color-surface);
  box-shadow: var(--shadow-raised);
  padding: 12px 15px;
  text-decoration: none;
}

.dl-fab:hover {
  background: var(--color-accent-deep);
  color: var(--color-surface);
}

.dl-fab-icon {
  display: grid;
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  place-items: center;
  border-radius: var(--radius-small);
  background: var(--color-surface);
  color: var(--color-ink);
}

.dl-fab-icon svg {
  width: 19px;
  height: 19px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
}

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

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

.dl-fab-copy strong {
  font-size: 0.88rem;
}

.dl-fab-copy span {
  font-size: 0.75rem;
  opacity: 0.82;
}

.swatch-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.swatch {
  min-width: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-small);
  background: var(--color-surface);
  color: var(--color-ink);
  overflow: clip;
}

.swatch-color {
  height: 78px;
}

.swatch-info {
  padding: 12px;
}

.swatch-info strong,
.swatch-info code {
  display: block;
}

.swatch-info code {
  margin-top: 4px;
  color: var(--color-muted);
  font-size: 0.72rem;
}

.swatch-page .swatch-color {
  background: var(--color-page);
}

.swatch-surface .swatch-color {
  background: var(--color-surface);
}

.swatch-soft .swatch-color {
  background: var(--color-surface-soft);
}

.swatch-border .swatch-color {
  background: var(--color-border);
}

.swatch-accent .swatch-color {
  background: var(--color-accent);
}

.swatch-accent-deep .swatch-color {
  background: var(--color-accent-deep);
}

.swatch-cyan .swatch-color {
  background: var(--color-cyan);
}

.swatch-orange .swatch-color {
  background: var(--color-orange);
}

.swatch-pink-soft .swatch-color {
  background: var(--color-pink-soft);
}

.swatch-blue-soft .swatch-color {
  background: var(--color-blue-soft);
}

.swatch-orange-soft .swatch-color {
  background: var(--color-orange-soft);
}

.swatch-ink .swatch-color {
  background: var(--color-ink);
}

.preview-header-space {
  padding-top: 14px;
}

.preview-footer {
  margin-top: 0;
}

@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-device {
    max-width: 720px;
    margin-inline: auto;
  }

  .fact-band-inner {
    flex-wrap: wrap;
    justify-content: flex-start;
  }

  .fact-item + .fact-item {
    border-left: 0;
    padding-left: 0;
  }

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

  .swatch-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .hero-preview {
    padding-top: 26px;
  }

  .hero-actions .btn-main,
  .hero-actions .btn-ghost {
    flex: 1 1 150px;
  }

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

  .platform-row a {
    flex: 1 1 132px;
    justify-content: center;
  }

  .fact-band-inner {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 13px;
  }

  .fact-item {
    display: block;
  }

  .fact-key,
  .fact-value {
    display: flex;
    white-space: normal;
  }

  .fact-value {
    margin-top: 3px;
  }

  .tab-list,
  .tab-list.four-tabs {
    display: flex;
    overflow-x: auto;
    padding-bottom: 4px;
    -webkit-overflow-scrolling: touch;
  }

  .tab-button {
    min-width: 145px;
  }

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

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

  .hero-device {
    transform: none;
  }
}

@media (max-width: 420px) {
  .client-chips li {
    padding-inline: 10px;
    font-size: 0.71rem;
  }

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

  .dl-fab-copy span {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .device-float-a,
  .device-float-b {
    animation: none;
  }
}