/* PivArk 开发助手 · 明暗双模 · 流程卡 + 左右分栏编辑器示意 */
.st-devkit {
  --dk-glow: color-mix(in srgb, var(--primary) 22%, transparent);
  --dk-card-bg: var(--bs-body-bg, #fff);
  --dk-card-border: color-mix(in srgb, var(--bs-body-color, #0f172a) 10%, transparent);
  --dk-muted: var(--bs-secondary-color, #64748b);
  --dk-ink: var(--bs-body-color, #0f172a);
  --dk-soft: color-mix(in srgb, var(--bs-body-color) 5%, transparent);
  --dk-hero-veil: linear-gradient(
    145deg,
    color-mix(in srgb, var(--primary) 12%, transparent) 0%,
    transparent 52%,
    color-mix(in srgb, var(--primary-dark, var(--primary)) 8%, transparent) 100%
  );
  --dk-grid: color-mix(in srgb, var(--primary) 8%, transparent);
  --dk-ide-bg: #0f172a;
  --dk-ide-panel: #111827;
  --dk-ide-line: rgba(255, 255, 255, 0.08);
  --dk-ide-text: #e2e8f0;
  --dk-ide-muted: #94a3b8;
}

[data-bs-theme=dark] .st-devkit {
  --dk-glow: color-mix(in srgb, var(--primary) 28%, transparent);
  --dk-card-bg: color-mix(in srgb, var(--bs-body-bg, #0f172a) 92%, var(--primary) 8%);
  --dk-card-border: color-mix(in srgb, #fff 12%, transparent);
  --dk-muted: color-mix(in srgb, var(--bs-body-color, #e2e8f0) 72%, transparent);
  --dk-ink: var(--bs-body-color, #e2e8f0);
  --dk-soft: color-mix(in srgb, #fff 6%, transparent);
  --dk-hero-veil: linear-gradient(
    145deg,
    color-mix(in srgb, var(--primary) 20%, transparent) 0%,
    transparent 48%,
    color-mix(in srgb, var(--primary) 12%, transparent) 100%
  );
  --dk-grid: color-mix(in srgb, #fff 5%, transparent);
}

.st-devkit-kicker {
  margin: 0 0 0.65rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary);
}

.st-devkit .st-hero--devkit {
  position: relative;
  overflow: hidden;
  padding-block: clamp(2.75rem, 6vw, 4.5rem);
  border-bottom: 1px solid var(--dk-card-border);
}

.st-devkit .st-hero--devkit::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    var(--dk-hero-veil),
    linear-gradient(var(--dk-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--dk-grid) 1px, transparent 1px);
  background-size: auto, 56px 56px, 56px 56px;
  mask-image: radial-gradient(ellipse 85% 75% at 50% 40%, #000 30%, transparent 88%);
  pointer-events: none;
}

.st-devkit .st-hero--devkit::after {
  content: "";
  position: absolute;
  width: min(36rem, 70vw);
  height: min(36rem, 70vw);
  right: -8%;
  top: -28%;
  border-radius: 50%;
  background: radial-gradient(circle, var(--dk-glow), transparent 70%);
  pointer-events: none;
}

.st-devkit .st-hero--devkit .container { position: relative; z-index: 1; }
.st-devkit .st-hero--devkit .st-hero__title::after { display: none; }

.st-devkit-hero--solo {
  max-width: 40rem;
  margin-inline: auto;
}

.st-devkit .st-hero--devkit .st-hero__title {
  font-size: clamp(2.2rem, 4.4vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin: 0 auto 0.95rem;
  max-width: 14ch;
  color: var(--dk-ink);
}

.st-devkit .st-hero--devkit .st-hero__lead {
  margin: 0 auto;
  max-width: 38rem;
  font-size: clamp(1.02rem, 1.55vw, 1.14rem);
  line-height: 1.7;
  color: var(--dk-muted);
}

.st-devkit-hero--solo .st-devkit-cta {
  justify-content: center;
  margin-top: 1.4rem;
}

.st-devkit-hero--solo .st-devkit-note {
  margin: 0.95rem auto 0;
  text-align: center;
  max-width: 36rem;
}

.st-devkit .st-devkit-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.st-devkit .st-devkit-cta .btn {
  min-width: 8.5rem;
  padding: 0.72rem 1.2rem;
  font-weight: 600;
  border-radius: 0.65rem;
}

.st-devkit .st-devkit-note {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--dk-muted);
}

/* —— IDE split —— */
.st-devkit-ide {
  border-radius: 1rem;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: var(--dk-ide-bg);
  box-shadow: 0 28px 70px rgba(15, 23, 42, 0.3);
}

.st-devkit-ide__chrome {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 0.9rem;
  border-bottom: 1px solid var(--dk-ide-line);
  color: var(--dk-ide-muted);
  font-size: 0.72rem;
}

.st-devkit-ide__dots {
  display: inline-flex;
  gap: 0.35rem;
}
.st-devkit-ide__dots i {
  width: 0.48rem;
  height: 0.48rem;
  border-radius: 50%;
  background: #475569;
  display: block;
}
.st-devkit-ide__dots i:nth-child(1) { background: #ff5f57; }
.st-devkit-ide__dots i:nth-child(2) { background: #febc2e; }
.st-devkit-ide__dots i:nth-child(3) { background: #28c840; }

.st-devkit-ide__path {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.st-devkit-ide__ver { opacity: 0.85; flex-shrink: 0; }

.st-devkit-ide__split {
  display: grid;
  grid-template-columns: 1fr;
  min-height: 22rem;
}
@media (min-width: 900px) {
  .st-devkit-ide__split {
    grid-template-columns: minmax(0, 1.15fr) minmax(17rem, 0.85fr);
  }
}

.st-devkit-ide__code {
  display: flex;
  flex-direction: column;
  min-width: 0;
  border-bottom: 1px solid var(--dk-ide-line);
  background: #0b1220;
}
@media (min-width: 900px) {
  .st-devkit-ide__code {
    border-bottom: 0;
    border-right: 1px solid var(--dk-ide-line);
  }
}

.st-devkit-ide__tabs {
  display: flex;
  gap: 0.15rem;
  padding: 0.45rem 0.55rem 0;
  border-bottom: 1px solid var(--dk-ide-line);
  background: #0a101c;
}
.st-devkit-ide__tabs span {
  padding: 0.45rem 0.75rem;
  font-size: 0.72rem;
  color: var(--dk-ide-muted);
  border-radius: 0.4rem 0.4rem 0 0;
}
.st-devkit-ide__tabs span.is-on {
  color: var(--dk-ide-text);
  background: #0b1220;
  border: 1px solid var(--dk-ide-line);
  border-bottom-color: #0b1220;
}

.st-devkit-ide__pre {
  margin: 0;
  padding: 0.9rem 0.75rem 1rem;
  flex: 1;
  overflow: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.78rem;
  line-height: 1.65;
  color: var(--dk-ide-text);
  white-space: pre;
}

.st-devkit-ide__pre .dk-ln { color: #475569; user-select: none; }
.st-devkit-ide__pre .dk-kw { color: #c084fc; }
.st-devkit-ide__pre .dk-ns { color: #93c5fd; }
.st-devkit-ide__pre .dk-cl { color: #67e8f9; }
.st-devkit-ide__pre .dk-fn { color: #86efac; }
.st-devkit-ide__pre .dk-ty { color: #fcd34d; }
.st-devkit-ide__pre .dk-st { color: #f9a8d4; }
.st-devkit-ide__pre .dk-cm { color: #64748b; font-style: italic; }

.st-devkit-ide__status {
  padding: 0.4rem 0.85rem;
  border-top: 1px solid var(--dk-ide-line);
  font-size: 0.68rem;
  color: var(--dk-ide-muted);
  background: #080e18;
}

.st-devkit-ide__agent {
  display: flex;
  flex-direction: column;
  padding: 0.95rem 0.95rem 0.85rem;
  background: var(--dk-ide-panel);
  color: var(--dk-ide-text);
  min-height: 18rem;
}

.st-devkit-ide__brand {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.7rem;
}
.st-devkit-ide__brand strong { font-size: 0.92rem; }
.st-devkit-ide__brand em {
  font-style: normal;
  font-size: 0.7rem;
  font-weight: 700;
  color: #67e8f9;
  padding: 0.18rem 0.5rem;
  border-radius: 999px;
  background: color-mix(in srgb, #67e8f9 14%, transparent);
  border: 1px solid color-mix(in srgb, #67e8f9 28%, transparent);
}

.st-devkit-ide__entries {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.35rem;
  margin-bottom: 0.85rem;
}
.st-devkit-ide__entries button {
  text-align: center;
  border: 1px solid var(--dk-ide-line);
  color: var(--dk-ide-muted);
  background: transparent;
  border-radius: 0.45rem;
  padding: 0.38rem 0.15rem;
  font-size: 0.7rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease, color 0.15s ease;
}
.st-devkit-ide__entries button:hover {
  color: var(--dk-ide-text);
  border-color: color-mix(in srgb, var(--primary) 40%, transparent);
}
.st-devkit-ide__entries button.is-active {
  color: #fff;
  border-color: color-mix(in srgb, var(--primary) 55%, transparent);
  background: color-mix(in srgb, var(--primary) 28%, transparent);
}

.st-devkit-chat {
  flex: 1;
  display: grid;
  gap: 0.65rem;
  align-content: start;
  margin-bottom: 0.75rem;
  overflow: auto;
  max-height: 16rem;
}

.st-devkit-chat__bubble {
  border-radius: 0.75rem;
  padding: 0.7rem 0.8rem;
  font-size: 0.8rem;
  line-height: 1.55;
}
.st-devkit-chat__bubble--user {
  justify-self: end;
  max-width: 92%;
  background: color-mix(in srgb, var(--primary) 32%, transparent);
  border: 1px solid color-mix(in srgb, var(--primary) 45%, transparent);
  color: #e0e7ff;
}
.st-devkit-chat__bubble--bot {
  justify-self: start;
  max-width: 100%;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--dk-ide-line);
  color: var(--dk-ide-text);
}
.st-devkit-chat__bubble--soft {
  color: var(--dk-ide-muted);
}
.st-devkit-chat__bubble strong {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.78rem;
  color: #86efac;
}
.st-devkit-chat__bubble p { margin: 0 0 0.4rem; color: var(--dk-ide-muted); }
.st-devkit-chat__bubble ol {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--dk-ide-muted);
}
.st-devkit-chat__bubble code {
  font-size: 0.74rem;
  color: #93c5fd;
  background: rgba(255, 255, 255, 0.06);
  padding: 0.05rem 0.3rem;
  border-radius: 0.25rem;
}

.st-devkit-ide__composer {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.4rem 0.45rem 0.4rem 0.7rem;
  border-radius: 0.65rem;
  border: 1px solid var(--dk-ide-line);
  background: #0b1220;
}
.st-devkit-ide__composer input {
  flex: 1;
  min-width: 0;
  border: 0;
  outline: none;
  background: transparent;
  color: var(--dk-ide-text);
  font-size: 0.8rem;
}
.st-devkit-ide__composer input::placeholder {
  color: #64748b;
}
.st-devkit-ide__composer button {
  flex-shrink: 0;
  border: 0;
  font-style: normal;
  font-weight: 700;
  font-size: 0.72rem;
  color: #fff;
  background: var(--primary);
  padding: 0.38rem 0.75rem;
  border-radius: 0.4rem;
  cursor: pointer;
}
.st-devkit-ide__composer button:hover {
  filter: brightness(1.08);
}

.st-devkit-ide__agent .visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* —— Unified demo: steps + IDE —— */
.st-devkit-demo-band {
  background: color-mix(in srgb, var(--bs-body-bg, #fff) 92%, var(--primary) 8%);
}

.st-devkit-demo {
  display: grid;
  gap: 1rem;
}

.st-devkit-steps-bar {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.55rem;
}
@media (min-width: 900px) {
  .st-devkit-steps-bar {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
.st-devkit-steps-bar button {
  text-align: left;
  border-radius: 0.85rem;
  border: 1px solid var(--dk-card-border);
  background: var(--dk-card-bg);
  color: var(--dk-ink);
  padding: 0.75rem 0.95rem 0.85rem;
  cursor: pointer;
  transition: border-color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}
.st-devkit-steps-bar button em {
  display: block;
  margin-bottom: 0.28rem;
  font-style: normal;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--dk-muted);
}
.st-devkit-steps-bar button strong {
  display: block;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--dk-ink);
}
.st-devkit-steps-bar button span {
  display: inline-block;
  margin-right: 0.28rem;
  color: var(--primary);
}
.st-devkit-steps-bar button:hover {
  transform: translateY(-1px);
  border-color: color-mix(in srgb, var(--primary) 35%, var(--dk-card-border));
}
.st-devkit-steps-bar button.is-active {
  border-color: color-mix(in srgb, var(--primary) 55%, transparent);
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--primary) 22%, transparent), 0 12px 28px color-mix(in srgb, var(--primary) 12%, transparent);
}
.st-devkit-steps-bar button.is-active em { color: var(--primary); }

.st-devkit-flow-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.35rem;
}
.st-devkit-flow-head .st-section-title { margin-bottom: 0.4rem; }

.st-devkit .st-devkit-grid {
  display: grid;
  grid-template-columns: repeat(1, minmax(0, 1fr));
  gap: 1.15rem;
}
@media (min-width: 768px) {
  .st-devkit .st-devkit-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

.st-devkit .st-devkit-card {
  height: 100%;
  padding: 1.5rem 1.35rem;
  border-radius: 1rem;
  background: var(--dk-card-bg);
  border: 1px solid var(--dk-card-border);
  box-shadow: 0 10px 28px color-mix(in srgb, var(--bs-body-color, #0f172a) 4%, transparent);
  transition: transform 0.2s ease, border-color 0.2s ease;
}
.st-devkit .st-devkit-card:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--primary) 42%, var(--dk-card-border));
}
.st-devkit .st-devkit-card__icon {
  width: 2.7rem;
  height: 2.7rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.75rem;
  margin-bottom: 0.95rem;
  font-size: 1.2rem;
  color: var(--primary);
  background: color-mix(in srgb, var(--primary) 14%, transparent);
}
.st-devkit .st-devkit-card h3 {
  font-size: 1.08rem;
  font-weight: 700;
  margin-bottom: 0.45rem;
}
.st-devkit .st-devkit-card p {
  margin: 0;
  color: var(--dk-muted);
  line-height: 1.65;
  font-size: 0.94rem;
}

.st-devkit .st-devkit-download {
  border-radius: 1.25rem;
  padding: clamp(1.75rem, 4vw, 2.75rem);
  border: 1px solid color-mix(in srgb, var(--primary) 32%, var(--dk-card-border));
  background:
    radial-gradient(ellipse at top right, var(--dk-glow), transparent 55%),
    var(--dk-card-bg);
}
.st-devkit .st-devkit-download h2 {
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0.6rem;
}
.st-devkit .st-devkit-download .lead {
  color: var(--dk-muted);
  max-width: 36rem;
}
.st-devkit .st-devkit-warn {
  margin-top: 1.15rem;
  padding: 0.9rem 1rem;
  border-radius: 0.75rem;
  font-size: 0.875rem;
  line-height: 1.55;
  color: var(--dk-muted);
  background: color-mix(in srgb, var(--bs-body-color) 5%, transparent);
  border: 1px dashed var(--dk-card-border);
}
.st-devkit .st-devkit-warn strong { color: var(--dk-ink); }
.st-devkit .st-devkit-soon {
  display: inline-block;
  margin-bottom: 0.55rem;
  padding: 0.22rem 0.6rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--primary);
  background: color-mix(in srgb, var(--primary) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--primary) 26%, transparent);
}

.st-devkit .st-page-band .st-devkit-cta { justify-content: center; }