/* 未选项目空态 — 作用域隔离，不影响工作区面板 / 卡片 */
.api-intel-main:has(> #api-intel-empty:not([hidden])) {
  display: flex;
  align-items: stretch;
  min-height: min(68vh, 720px);
}

.api-intel-main > .api-intel-empty[data-empty-skin="v3"] {
  position: relative;
  flex: 1 1 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0;
  padding: clamp(1.6rem, 3.2vw, 2.6rem) clamp(1.25rem, 3vw, 2.4rem);
  overflow: hidden;
  isolation: isolate;
  background:
    linear-gradient(155deg, rgba(255, 255, 255, 0.78) 0%, rgba(255, 255, 255, 0.52) 48%, rgba(236, 247, 252, 0.62) 100%);
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: calc(var(--aiintel-radius) + 0.22rem);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.85) inset,
    0 28px 56px -36px rgba(15, 28, 46, 0.38),
    0 0 0 1px rgba(14, 116, 144, 0.04);
  backdrop-filter: blur(18px) saturate(1.18);
  -webkit-backdrop-filter: blur(18px) saturate(1.18);
}

.api-intel-main > .api-intel-empty[data-empty-skin="v3"] .api-intel-empty__stage {
  position: relative;
  z-index: 1;
  width: min(100%, 34rem);
  display: grid;
  gap: 1.35rem;
  justify-items: center;
  text-align: center;
}

.api-intel-main > .api-intel-empty[data-empty-skin="v3"] .api-intel-empty__glow {
  position: absolute;
  z-index: 0;
  width: 18rem;
  height: 18rem;
  top: 42%;
  left: 50%;
  transform: translate(-50%, -58%);
  border-radius: 50%;
  background:
    radial-gradient(circle at 40% 35%, rgba(14, 116, 144, 0.18), rgba(14, 116, 144, 0.04) 42%, transparent 70%);
  filter: blur(2px);
  pointer-events: none;
  animation: apiIntelEmptyGlow 7.5s var(--aiintel-ease) infinite alternate;
}

.api-intel-main > .api-intel-empty[data-empty-skin="v3"] .api-intel-empty__mark {
  position: relative;
  width: 4.4rem;
  height: 4.4rem;
  display: grid;
  place-items: center;
  margin-bottom: 0.15rem;
}

.api-intel-main > .api-intel-empty[data-empty-skin="v3"] .api-intel-empty__mark-ring {
  position: absolute;
  inset: 0;
  border-radius: 1.2rem;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.95), rgba(224, 242, 254, 0.55));
  border: 1px solid rgba(14, 116, 144, 0.16);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.9) inset,
    0 14px 28px -18px rgba(14, 116, 144, 0.45);
  transform: rotate(8deg);
  animation: apiIntelEmptyMark 8s var(--aiintel-ease) infinite alternate;
}

.api-intel-main > .api-intel-empty[data-empty-skin="v3"] .api-intel-empty__mark-core {
  position: relative;
  z-index: 1;
  font-family: var(--aiintel-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--aiintel-accent-deep);
}

.api-intel-main > .api-intel-empty[data-empty-skin="v3"] .api-intel-empty__copy {
  display: grid;
  gap: 0.45rem;
  justify-items: center;
}

.api-intel-main > .api-intel-empty[data-empty-skin="v3"] .api-intel-empty__kicker {
  margin: 0;
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--aiintel-accent);
  font-weight: 750;
  opacity: 0.92;
}

.api-intel-main > .api-intel-empty[data-empty-skin="v3"] .api-intel-empty__lead {
  margin: 0;
  max-width: 18ch;
  font-size: clamp(1.35rem, 2.4vw, 1.72rem);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.03em;
  color: var(--aiintel-ink);
  text-wrap: balance;
}

.api-intel-main > .api-intel-empty[data-empty-skin="v3"] .api-intel-empty__sub {
  margin: 0.15rem 0 0;
  font-size: 0.82rem;
  font-weight: 550;
  letter-spacing: 0.01em;
  color: var(--aiintel-muted);
  line-height: 1.45;
}

.api-intel-main > .api-intel-empty[data-empty-skin="v3"] .api-intel-empty__guide {
  list-style: none;
  width: 100%;
  margin: 0.35rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.55rem;
  text-align: left;
  counter-reset: empty-step;
}

.api-intel-main > .api-intel-empty[data-empty-skin="v3"] .api-intel-empty__guide li {
  counter-increment: empty-step;
  position: relative;
  display: grid;
  grid-template-columns: 2.35rem minmax(0, 1fr);
  column-gap: 0.85rem;
  row-gap: 0.12rem;
  align-items: start;
  margin: 0;
  padding: 0.92rem 1rem 0.92rem 0.95rem;
  border-radius: 0.95rem;
  border: 1px solid rgba(255, 255, 255, 0.7);
  background: rgba(255, 255, 255, 0.55);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.75) inset;
  transition:
    transform 0.28s var(--aiintel-ease),
    border-color 0.28s var(--aiintel-ease),
    background 0.28s var(--aiintel-ease),
    box-shadow 0.28s var(--aiintel-ease);
}

.api-intel-main > .api-intel-empty[data-empty-skin="v3"] .api-intel-empty__guide li::before {
  content: counter(empty-step);
  grid-row: 1 / span 2;
  align-self: center;
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 0.72rem;
  display: grid;
  place-items: center;
  font-family: var(--aiintel-mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--aiintel-accent-deep);
  background: linear-gradient(160deg, rgba(224, 242, 254, 0.95), rgba(14, 116, 144, 0.12));
  border: 1px solid rgba(14, 116, 144, 0.16);
  box-shadow: 0 8px 16px -12px rgba(14, 116, 144, 0.55);
  left: auto;
  top: auto;
  transform: none;
}

.api-intel-main > .api-intel-empty[data-empty-skin="v3"] .api-intel-empty__guide li:hover {
  transform: translateY(-2px);
  border-color: rgba(14, 116, 144, 0.22);
  background: rgba(255, 255, 255, 0.78);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.9) inset,
    0 16px 28px -22px rgba(14, 116, 144, 0.35);
}

.api-intel-main > .api-intel-empty[data-empty-skin="v3"] .api-intel-empty__step-title {
  grid-column: 2;
  font-size: 0.88rem;
  font-weight: 750;
  letter-spacing: -0.01em;
  color: var(--aiintel-ink);
  line-height: 1.3;
}

.api-intel-main > .api-intel-empty[data-empty-skin="v3"] .api-intel-empty__step-text {
  grid-column: 2;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--aiintel-muted);
  line-height: 1.5;
}

@keyframes apiIntelEmptyGlow {
  from { opacity: 0.55; transform: translate(-50%, -58%) scale(0.96); }
  to { opacity: 1; transform: translate(-50%, -54%) scale(1.06); }
}

@keyframes apiIntelEmptyMark {
  from { transform: rotate(8deg) translateY(0); }
  to { transform: rotate(14deg) translateY(-3px); }
}

@media (prefers-reduced-motion: reduce) {
  .api-intel-main > .api-intel-empty[data-empty-skin="v3"] .api-intel-empty__glow,
  .api-intel-main > .api-intel-empty[data-empty-skin="v3"] .api-intel-empty__mark-ring,
  .api-intel-main > .api-intel-empty[data-empty-skin="v3"] .api-intel-empty__guide li {
    animation: none !important;
    transition: none !important;
  }
  .api-intel-main > .api-intel-empty[data-empty-skin="v3"] .api-intel-empty__guide li:hover {
    transform: none;
  }
}

@media (max-width: 720px) {
  .api-intel-main:has(> #api-intel-empty:not([hidden])) {
    min-height: 0;
  }
  .api-intel-main > .api-intel-empty[data-empty-skin="v3"] {
    padding: 1.25rem 1rem 1.35rem;
  }
  .api-intel-main > .api-intel-empty[data-empty-skin="v3"] .api-intel-empty__lead {
    max-width: none;
  }
}

/* hidden 必须压过上方 display:flex，否则已选项目时空态仍显示 */
.api-intel-main > #api-intel-empty[hidden] {
  display: none;
}