/* DuDuTalk AI 桌面 1920 还原 */

.ai-hero__m {
  display: none;
}

.ai-engine {
  background: var(--color-module);
  padding: var(--section-y) 0;
}

.ai-engine__head,
.ai-scene__head,
.ai-value__head,
.ai-arch__head,
.ai-effect__head {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  margin-bottom: var(--block-gap);
}

.ai-engine__titles,
.ai-scene__titles,
.ai-value__titles,
.ai-arch__titles {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.ai-engine__head .sec-desc,
.ai-scene__head .sec-desc,
.ai-tech .sec-desc {
  text-align: center;
}

.ai-engine__tabs {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  margin-bottom: 60px;
}

.ai-tab {
  width: 136px;
  height: 46px;
  padding: 10px;
  border-radius: 50px;
  background: #edf1fa;
  color: var(--color-sub);
  font-size: 16px;
  font-weight: 400;
  line-height: 1;
  text-align: center;
}

.ai-tab.is-active {
  background: var(--color-white);
  color: var(--color-primary);
  box-shadow: inset 0 0 0 1px var(--color-primary);
}

.ai-engine__pane {
  display: none;
  align-items: flex-start;
  gap: 90px;
  width: 1200px;
  max-width: 100%;
  margin: 0 auto;
}

.ai-engine__pane.is-active {
  display: flex;
}

.ai-engine__copy {
  display: flex;
  flex-direction: column;
  gap: 20px;
  width: 571px;
  max-width: 100%;
  min-width: 0;
}

.ai-engine__lead {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.ai-engine__lead h3 {
  font-size: 20px;
  font-weight: 700;
  line-height: 32px;
  color: var(--color-text);
}

.ai-engine__lead p,
.ai-engine__points li {
  font-size: 16px;
  font-weight: 400;
  line-height: 28px;
  color: var(--color-sub);
}

.ai-engine__lead p {
  color: var(--color-sub);
}

.ai-engine__points {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.ai-engine__points li {
  position: relative;
  padding-left: 16px;
  color: var(--color-text);
  white-space: normal;
  overflow-wrap: break-word;
}

.ai-engine__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-primary);
}

.ai-engine__line {
  display: block;
  width: 100%;
  height: 1px;
  background: var(--color-line);
}

.ai-engine__screen {
  width: 540px;
  max-width: 100%;
  height: auto;
  aspect-ratio: 540 / 443;
  flex-shrink: 0;
  overflow: visible;
  border-radius: 24px;
  background: transparent;
  box-shadow: 0 12px 39px rgba(0, 0, 0, 0.11);
}

.ai-engine__screen img {
  border-radius: 24px;
}

.ai-value {
  background: var(--color-dark);
  padding: var(--section-y) 0;
}

.ai-value__head {
  width: 100%;
  max-width: 1008px;
  margin: 0 auto var(--block-gap);
}

.ai-value .sec-title {
  white-space: normal;
  line-height: 1.3;
}

.ai-value .sec-label,
.ai-value .sec-label span,
.ai-value .sec-title,
.ai-arch .sec-label,
.ai-arch .sec-label span,
.ai-arch .sec-title {
  color: var(--color-white);
}

.ai-value .sec-desc {
  line-height: 28px;
  text-align: center;
  color: var(--color-white-60);
}

.ai-arch .sec-desc {
  text-align: center;
  color: var(--color-white-60);
}

.ai-value__steps {
  --ai-step-gap: 80px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  column-gap: var(--ai-step-gap);
  width: 100%;
  max-width: 1096px;
  margin: 0 auto;
}

.ai-step {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
  width: auto;
}

.ai-step__label {
  display: flex;
  align-items: center;
  gap: 6px;
  width: 100%;
  overflow: visible;
  color: var(--color-white);
  font-size: 14px;
  line-height: 20px;
}

.ai-step:not(:last-child) .ai-step__label::after {
  content: "";
  flex: 1 1 0;
  min-width: 0;
  height: 1px;
  margin-right: calc(-1 * var(--ai-step-gap) + 12px);
  background: rgba(255, 255, 255, 0.35);
  pointer-events: none;
}

.ai-step__label i {
  width: 11px;
  height: 11px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--color-white);
}

.ai-step__label span {
  flex-shrink: 0;
}

.ai-step h3 {
  font-size: 20px;
  font-weight: 700;
  line-height: 32px;
  color: var(--color-white);
}

.ai-step > p {
  font-size: 14px;
  line-height: 22px;
  color: var(--color-white);
}

.ai-step__line {
  display: block;
  width: 270px;
  max-width: 100%;
  height: 1px;
  background: none;
  background-image: repeating-linear-gradient(
    to right,
    rgba(255, 255, 255, 0.45) 0,
    rgba(255, 255, 255, 0.45) 2px,
    transparent 2px,
    transparent 6px
  );
}

.ai-step__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 12px;
}

.ai-step__tags span {
  padding: 4px 6px;
  border-radius: 20px;
  background: var(--color-primary);
  color: var(--color-white);
  font-size: 12px;
  line-height: 1;
}

.ai-tech .sec-desc {
  max-width: 1008px;
  line-height: 32px;
}

.ai-scene {
  background: var(--color-white);
  padding: var(--section-y) 0;
}

.ai-scene__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 40px;
}

.ai-scene-card {
  width: auto;
  min-width: 0;
  overflow: hidden;
  border-radius: 20px;
  background: var(--color-module);
}

.ai-scene-card__cover {
  width: 100%;
  height: auto;
  aspect-ratio: 373 / 300;
  border-radius: 20px 20px 0 0;
}

.ai-scene-card__body {
  padding: 20px 18px;
}

.ai-scene-card h3 {
  font-size: 20px;
  font-weight: 700;
  line-height: 32px;
  color: var(--color-text);
}

.ai-scene-card p {
  margin-top: 8px;
  font-size: 14px;
  line-height: 22px;
  color: var(--color-sub);
}

.ai-scene__more {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 32px;
  margin-top: 40px;
  text-align: center;
}

.ai-scene__more h3 {
  font-size: 20px;
  font-weight: 700;
  line-height: 23px;
  color: var(--color-text);
}

.ai-scene__more p {
  display: flex;
  align-items: center;
  gap: 16px;
  width: 100%;
  font-size: 16px;
  line-height: 24px;
  color: var(--color-sub);
}

.ai-scene__more p i {
  flex: 1;
  height: 1px;
  background: var(--color-line);
}

.ai-scene__more .btn {
  width: 160px;
}

.ai-arch {
  background: var(--color-dark);
  padding: var(--section-y) 0;
}

.ai-arch .wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 80px;
}

.ai-arch__head {
  width: 100%;
  margin-bottom: 0;
}

.ai-arch .sec-title {
  white-space: normal;
  line-height: 1.3;
}

.ai-arch__br {
  display: none;
}

.ai-arch__flow {
  display: flex;
  align-items: stretch;
  justify-content: center;
  width: 100%;
  max-width: 1119px;
}

.ai-arch-node {
  display: flex;
  flex: 1 1 0;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: auto;
  min-width: 0;
  min-height: 127px;
  padding: 16px 8px;
  border-radius: 20px;
  background: var(--color-white-11);
}

.ai-arch-node p {
  font-size: 16px;
  line-height: 1.25;
  text-align: center;
  color: var(--color-white);
}

.ai-arch-node.is-active {
  background: var(--color-primary);
}

.ai-arch-arrow {
  display: block;
  flex: none;
  align-self: center;
  width: 27px;
  height: 27px;
  margin: 0 8px;
  object-fit: contain;
}

.ai-arch__cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 40px 80px;
  width: 100%;
  max-width: 864px;
}

.ai-arch-card {
  width: auto;
  min-width: 0;
  padding: 20px;
  border-radius: 20px;
  background: var(--color-white-11);
}

.ai-arch-card h3 {
  font-size: 20px;
  font-weight: 700;
  line-height: 1;
  color: var(--color-white);
}

.ai-arch-card p {
  margin-top: 8px;
  font-size: 16px;
  line-height: 1.2;
  color: var(--color-white);
}

.ai-effect {
  background: var(--color-module);
  padding: var(--section-y) 0;
}

.ai-effect__grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--card-gap);
}

.ai-effect .iot-value-card {
  background: var(--color-white);
}

.ai-effect .iot-value-card h3 {
  color: var(--color-text);
}

.ai-effect .iot-value-card p {
  line-height: 20px;
}