.tabs {
  min-width: 0;
}

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

.tab-button {
  min-width: max-content;
  min-height: 44px;
  padding: 9px 18px;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--color-ink-muted);
  font-weight: 650;
  cursor: pointer;
}

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

.tab-button[aria-selected="true"],
.tab-button.is-active {
  background: var(--color-canvas);
  color: var(--color-accent-deep);
  box-shadow: var(--shadow-card);
}

.tab-panel {
  padding-top: 30px;
}

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

.toc {
  position: relative;
  max-width: 100%;
  padding: 10px;
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-canvas);
  color: var(--color-ink);
  box-shadow: var(--shadow-card);
}

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

.toc a {
  display: flex;
  min-height: 44px;
  align-items: center;
  padding: 8px 14px;
  border-radius: var(--radius-small);
  color: var(--color-ink-muted);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
}

.toc a:hover,
.toc a[aria-current="true"] {
  background: var(--color-accent-surface);
  color: var(--color-accent-deep);
}

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

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-canvas);
  color: var(--color-ink);
  box-shadow: var(--shadow-card);
}

.faq-item summary {
  display: flex;
  min-height: 66px;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 22px;
  color: var(--color-ink);
  font-weight: 700;
  cursor: pointer;
  list-style: none;
}

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

.faq-item summary::after {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  color: var(--color-accent-deep);
  content: "+";
  font: 600 18px/22px var(--font-body);
  text-align: center;
}

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

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

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

.glossary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.term-card {
  position: relative;
  min-width: 0;
  padding: 26px;
  overflow-x: clip;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-canvas);
  color: var(--color-ink);
  box-shadow: var(--shadow-card);
}

.term-card::before {
  position: absolute;
  top: 0;
  left: 26px;
  width: 54px;
  height: 3px;
  border-radius: var(--radius-pill);
  background: var(--gradient-accent);
  content: "";
}

.term-name {
  margin-bottom: 8px;
  font: 750 20px/1.35 var(--font-display);
}

.term-meta {
  margin-bottom: 12px;
  color: var(--color-accent-deep);
  font: 600 12px/1.4 var(--font-mono);
}

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

.download-card {
  display: grid;
  min-width: 0;
  gap: 22px;
  padding: clamp(24px, 4vw, 36px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-panel);
  background: var(--color-canvas);
  color: var(--color-ink);
  box-shadow: var(--shadow-card);
}

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

.download-card-head img {
  width: 56px;
  height: 56px;
  flex-shrink: 0;
}

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

.download-card-title h3 {
  margin-bottom: 5px;
}

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

.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.release-version {
  color: var(--color-ink-muted);
  font: 600 13px/1.5 var(--font-mono);
  overflow-wrap: anywhere;
}

.recommend-badge,
.primary-badge,
.retired-badge {
  display: inline-flex;
  max-width: 100%;
  min-height: 27px;
  align-items: center;
  padding: 4px 10px;
  overflow: hidden;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 750;
}

.primary-badge {
  border: 1px solid var(--color-accent);
  background: var(--color-accent-surface);
  color: var(--color-accent-deep);
}

.recommend-badge {
  border: 1px solid var(--color-success-border);
  background: var(--color-success-surface);
  color: var(--color-success);
}

.retired-badge {
  border: 1px solid var(--color-border);
  background: var(--color-neutral-surface);
  color: var(--color-ink-muted);
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

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

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

.article-card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px;
  margin-bottom: 18px;
  color: var(--color-ink-muted);
  font: 600 12px/1.5 var(--font-mono);
}

.article-card h3 {
  font-size: 21px;
}

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

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

.callout {
  position: relative;
  margin: 28px 0;
  padding: 22px 24px 22px 28px;
  overflow-x: clip;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-accent-surface);
  color: var(--color-ink);
}

.callout::before {
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: var(--gradient-accent);
  content: "";
}

.callout-title {
  margin-bottom: 6px;
  color: var(--color-ink);
  font-weight: 750;
}

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

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

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

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

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

.dl-fab {
  position: fixed;
  z-index: 80;
  right: max(18px, env(safe-area-inset-right));
  bottom: max(18px, env(safe-area-inset-bottom));
  display: flex;
  max-width: min(340px, calc(100vw - 32px));
  min-height: 64px;
  align-items: center;
  gap: 13px;
  padding: 11px 17px 11px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-canvas);
  color: var(--color-ink);
  box-shadow: var(--shadow-deep);
  text-decoration: none;
}

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

.dl-fab-icon {
  display: grid;
  width: 42px;
  height: 42px;
  flex-shrink: 0;
  place-items: center;
  border-radius: 50%;
  background: var(--gradient-accent);
  color: var(--color-on-accent);
}

.dl-fab-icon svg {
  width: 19px;
  height: 19px;
}

.dl-fab-copy {
  display: grid;
  min-width: 0;
  gap: 1px;
}

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

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

.download-end-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 52px;
  padding: clamp(24px, 4vw, 38px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-panel);
  background: var(--color-panel);
  color: var(--color-ink);
}

.download-end-card-copy {
  max-width: 650px;
}

.download-end-card-copy > :last-child {
  margin-bottom: 0;
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: clamp(42px, 7vw, 92px);
  row-gap: 52px;
}

.feature-item {
  display: grid;
  min-width: 0;
  grid-template-columns: 56px minmax(0, 1fr);
  align-items: start;
  gap: 18px;
}

.feature-icon {
  display: grid;
  width: 56px;
  height: 56px;
  flex-shrink: 0;
  place-items: center;
  border-radius: var(--radius-card);
  background: var(--gradient-accent);
  color: var(--color-on-accent);
  box-shadow: var(--shadow-button);
}

.feature-icon svg {
  width: 27px;
  height: 27px;
}

.feature-item h3 {
  margin: 2px 0 7px;
  font-size: 20px;
}

.feature-item p {
  margin: 0;
  color: var(--color-ink-muted);
}

.hero {
  position: relative;
  overflow-x: clip;
  background: var(--color-canvas);
  color: var(--color-ink);
}

.hero-grid {
  display: grid;
  max-width: calc(1240px + var(--gutter) * 2);
  margin-inline: auto;
  padding: 58px var(--gutter) 72px;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  align-items: center;
  gap: 56px;
}

.hero-badge {
  display: inline-flex;
  max-width: 100%;
  align-items: center;
  gap: 9px;
  padding: 7px 15px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-canvas);
  color: var(--color-ink-muted);
  font-size: 13.5px;
  font-weight: 500;
}

.hero-badge strong {
  font-weight: 650;
}

.badge-separator {
  color: var(--color-border);
}

.hero-title {
  margin-top: 26px;
  margin-bottom: 0;
}

.hero-title-line {
  display: block;
}

.hero-description {
  max-width: 520px;
  margin-top: 22px;
  margin-bottom: 0;
  color: var(--color-ink-muted);
  font-size: 17px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
  margin-top: 32px;
}

.platform-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 24px;
  margin-top: 38px;
}

.platform-caption {
  flex-shrink: 0;
  color: var(--color-ink-muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.13em;
}

.platform-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 22px;
}

.platform-list a,
.platform-list li {
  display: flex;
  align-items: center;
  gap: 7px;
  color: var(--color-ink-muted);
  font-size: 14px;
  font-weight: 550;
  text-decoration: none;
}

.platform-list svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.platform-list a:hover {
  color: var(--color-ink);
}

.hero-stage {
  position: relative;
  height: 540px;
  min-width: 0;
}

.stage-stripes {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 46% 38% at 52% 50%, var(--color-stripe-glow), transparent 72%),
    repeating-linear-gradient(90deg, var(--color-stripe) 0 2px, transparent 2px 11px);
  -webkit-mask-image: radial-gradient(ellipse 62% 52% at 50% 50%, var(--color-ink) 26%, transparent 74%);
  mask-image: radial-gradient(ellipse 62% 52% at 50% 50%, var(--color-ink) 26%, transparent 74%);
}

.setting-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 15px;
  padding: 16px 18px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-canvas);
  color: var(--color-ink);
  box-shadow: var(--shadow-card);
}

.setting-label {
  min-width: 0;
  flex: 1;
  color: var(--color-ink);
  font: 650 13.5px/1.4 var(--font-mono);
  white-space: nowrap;
}

.setting-state {
  flex-shrink: 0;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 650;
}

.setting-state-on {
  border: 1px solid var(--color-success-border);
  background: var(--color-success-surface);
  color: var(--color-success);
}

.setting-state-off {
  border: 1px solid var(--color-border);
  background: var(--color-neutral-surface);
  color: var(--color-ink-muted);
}

.setting-toggle {
  position: relative;
  width: 42px;
  height: 24px;
  flex-shrink: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-panel-strong);
}

.setting-toggle::after {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-canvas);
  box-shadow: 0 1px 3px var(--color-shadow-toggle);
  content: "";
}

.setting-toggle.is-on {
  border-color: transparent;
  background: var(--gradient-accent);
}

.setting-toggle.is-on::after {
  right: 2px;
  left: auto;
}

.setting-card-1 {
  z-index: 1;
  top: 44px;
  left: 20%;
  width: 304px;
  opacity: 0.55;
  transform: scale(0.93);
}

.setting-card-2 {
  z-index: 4;
  top: 150px;
  left: 2%;
  width: min(404px, 88%);
  padding: 21px 23px;
  border-radius: var(--radius-large);
  box-shadow: var(--shadow-deep);
}

.setting-card-2 .setting-label {
  font-size: 15px;
}

.setting-card-2 .setting-toggle {
  width: 48px;
  height: 27px;
}

.setting-card-2 .setting-toggle::after {
  width: 21px;
  height: 21px;
}

.setting-card-3 {
  z-index: 3;
  top: 288px;
  left: 24%;
  width: 336px;
  opacity: 0.86;
}

.setting-card-4 {
  z-index: 2;
  top: 396px;
  left: 10%;
  width: 300px;
  opacity: 0.48;
  transform: scale(0.92);
}

@keyframes hero-rise {
  from {
    opacity: 0;
    transform: translateY(16px);
  }

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

.hero-fx {
  animation: hero-rise 500ms cubic-bezier(0.22, 0.72, 0.28, 1) both;
}

.hero-fx-2 {
  animation-delay: 90ms;
}

.hero-fx-3 {
  animation-delay: 180ms;
}

.hero-fx-4 {
  animation-delay: 300ms;
}

.hero-fx-5 {
  animation-delay: 420ms;
}

.hero-fx-6 {
  animation-delay: 550ms;
}

@media (max-width: 1080px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 42px;
    padding-top: 44px;
    padding-bottom: 56px;
  }

  .hero-stage {
    width: 100%;
    max-width: 520px;
    height: 480px;
    margin-inline: auto;
  }

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

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

  .download-end-card {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 640px) {
  .tab-list {
    border-radius: var(--radius-card);
  }

  .hero-description {
    font-size: 16px;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .hero-actions .button {
    width: 100%;
  }

  .platform-row {
    align-items: flex-start;
  }

  .platform-list {
    gap: 14px;
  }

  .hero-stage {
    height: 410px;
  }

  .setting-card {
    gap: 10px;
    padding: 13px;
  }

  .setting-card-1 {
    top: 28px;
    left: 10%;
    width: 78%;
  }

  .setting-card-2 {
    top: 120px;
    left: 0;
    width: 94%;
    padding: 17px;
  }

  .setting-card-3 {
    top: 235px;
    left: 9%;
    width: 88%;
  }

  .setting-card-4 {
    top: 330px;
    left: 3%;
    width: 79%;
  }

  .setting-label {
    font-size: 11px;
    white-space: normal;
  }

  .setting-card-2 .setting-label {
    font-size: 12px;
  }

  .setting-state {
    padding-inline: 8px;
    font-size: 10px;
  }

  .dl-fab {
    right: 16px;
    bottom: 16px;
    left: 16px;
    max-width: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero-fx {
    animation: none;
  }
}