.page-products {
  --pd-gap: clamp(16px, 2.6vw, 30px);
  --pd-shadow-cyan: 10px 10px 0 rgba(33, 230, 193, .16);
  --pd-shadow-gold: 10px 10px 0 rgba(232, 180, 90, .20);
  --pd-shadow-signal: 10px 10px 0 rgba(255, 90, 60, .16);
  color: var(--ky-paper);
  padding-bottom: clamp(40px, 7vw, 84px);
  position: relative;
}

.page-products .ky-breadcrumbs {
  padding-top: clamp(18px, 3vw, 30px);
}

.page-products img {
  max-width: 100%;
  height: auto;
}

/* ---------- 首屏 ---------- */
.pd-hero {
  padding-top: clamp(16px, 3vw, 34px);
}

.pd-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 5vw, 54px);
  align-items: center;
}

.pd-hero__title {
  font-size: clamp(32px, 7.4vw, 62px);
  line-height: 1.06;
  letter-spacing: -.01em;
  margin: .26em 0 .5em;
  max-width: 15em;
}

.pd-hero__lead {
  max-width: 34em;
  color: var(--ky-paper);
  opacity: .86;
}

.pd-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.pd-hero__specs {
  list-style: none;
  margin: 30px 0 0;
  padding: 20px 0 0;
  border-top: 2px solid var(--ky-line);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.pd-spec__k {
  display: block;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--ky-mist);
}

.pd-spec__v {
  display: block;
  margin-top: 6px;
  font-family: var(--ky-mono);
  font-size: clamp(16px, 2.4vw, 22px);
  color: var(--ky-gold);
  word-break: break-word;
}

.pd-hero__frame {
  position: relative;
  margin: 0;
  border: 2px solid var(--ky-line);
  background: var(--ky-deep);
  box-shadow: var(--pd-shadow-cyan);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 44px), calc(100% - 44px) 100%, 0 100%);
}

.pd-hero__frame img {
  display: block;
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

.pd-hero__frame::after {
  content: "ANDROID · V3.4";
  position: absolute;
  right: 14px;
  bottom: 52px;
  font-family: var(--ky-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--ky-cyan);
  writing-mode: vertical-rl;
  opacity: .8;
}

/* ---------- 安装轨道 ---------- */
.pd-note {
  max-width: 34em;
  color: var(--ky-mist);
  font-size: 15px;
  line-height: 1.75;
  margin: 0;
}

.pd-tree {
  display: none;
}

.pd-tree svg {
  display: block;
  width: 100%;
  height: auto;
}

.pd-tree__rail {
  fill: none;
  stroke: var(--ky-line);
  stroke-width: 2;
  stroke-dasharray: 6 8;
}

.pd-tree__node {
  fill: var(--ky-deep);
  stroke: var(--ky-cyan);
  stroke-width: 2;
}

.pd-tree__node--gold {
  stroke: var(--ky-gold);
}

.pd-steps {
  list-style: none;
  margin: clamp(22px, 3.4vw, 34px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--pd-gap);
}

.pd-step {
  position: relative;
  padding: 28px 22px 26px;
  background: var(--ky-deep);
  border: 2px solid var(--ky-line);
  box-shadow: 8px 8px 0 rgba(33, 230, 193, .14);
}

.pd-step::after {
  content: "";
  position: absolute;
  left: -2px;
  top: -2px;
  width: 52px;
  height: 4px;
  background: var(--ky-cyan);
}

.pd-step__num {
  display: block;
  font-size: clamp(30px, 5vw, 42px);
  line-height: 1;
  color: var(--ky-gold);
  letter-spacing: .04em;
}

.pd-step__title {
  margin: 16px 0 10px;
  font-size: clamp(18px, 2.4vw, 21px);
  line-height: 1.35;
  color: var(--ky-paper);
}

.pd-step__body {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ky-mist);
}

/* ---------- 功能标签 ---------- */
.pd-tabs {
  margin-top: clamp(22px, 3.4vw, 34px);
}

.page-products .pd-tabs .ky-tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding-bottom: 18px;
  border-bottom: 2px solid var(--ky-line-soft);
}

.page-products .pd-tabs .ky-tabs__tab {
  font-family: var(--ky-sans);
  font-size: 15px;
  letter-spacing: .04em;
  padding: 11px 20px;
  color: var(--ky-mist);
  background: transparent;
  border: 2px solid var(--ky-line);
  cursor: pointer;
  transition: color .2s var(--ky-ease), border-color .2s var(--ky-ease),
    background .2s var(--ky-ease), box-shadow .2s var(--ky-ease), transform .2s var(--ky-ease);
}

.page-products .pd-tabs .ky-tabs__tab:hover {
  color: var(--ky-paper);
  border-color: var(--ky-cyan);
  transform: translateY(-2px);
}

.page-products .pd-tabs .ky-tabs__tab[aria-selected="true"] {
  color: var(--ky-night);
  background: var(--ky-cyan);
  border-color: var(--ky-cyan);
  box-shadow: 6px 6px 0 rgba(232, 180, 90, .35);
}

.page-products .pd-tabs .ky-tabs__tab:focus-visible {
  outline: 2px solid var(--ky-gold);
  outline-offset: 3px;
}

.page-products .pd-tabs .ky-tabs__panel {
  padding-top: clamp(26px, 4vw, 40px);
}

.page-products .pd-tabs .ky-tabs__panel[hidden] {
  display: none;
}

.pd-panel__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.6vw, 40px);
  align-items: center;
}

.pd-panel__tag {
  display: inline-flex;
  align-items: center;
  margin: 0 0 14px;
  padding: 5px 12px;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--ky-night);
  background: var(--ky-gold);
}

.pd-panel__tag--live {
  background: var(--ky-cyan);
}

.pd-panel__tag--live::before {
  content: "";
  width: 8px;
  height: 8px;
  margin-right: 8px;
  border-radius: 50%;
  background: var(--ky-night);
  animation: pd-pulse 2.2s var(--ky-ease) infinite;
}

@keyframes pd-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .3; transform: scale(1.55); }
}

.pd-panel__title {
  margin: 0 0 14px;
  font-size: clamp(21px, 3.4vw, 30px);
  line-height: 1.3;
  color: var(--ky-paper);
}

.pd-panel__text {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ky-mist);
  max-width: 36em;
}

.pd-list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.pd-list li {
  position: relative;
  padding-left: 22px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ky-paper);
  opacity: .88;
}

.pd-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 8px;
  height: 8px;
  background: var(--ky-cyan);
  transform: rotate(45deg);
}

.pd-panel__media {
  margin: 0;
  border: 2px solid var(--ky-line);
  background: var(--ky-deep);
  box-shadow: var(--pd-shadow-gold);
  clip-path: polygon(0 30px, 30px 0, 100% 0, 100% 100%, 0 100%);
}

.pd-panel__media img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

/* ---------- 适配清单 ---------- */
.pd-fit__groups {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 2.8vw, 28px);
  margin-top: clamp(22px, 3.4vw, 34px);
}

.pd-fit__group {
  padding: 24px 20px 26px;
  background: var(--ky-deep);
  border: 2px solid var(--ky-line);
}

.pd-fit__group--accent {
  border-color: var(--ky-cyan);
  box-shadow: var(--pd-shadow-cyan);
}

.pd-fit__group h3 {
  margin: 0 0 16px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .14em;
  color: var(--ky-gold);
}

.pd-fit__items {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.pd-fit__items li {
  display: flex;
  gap: 10px;
  align-items: baseline;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ky-mist);
}

.pd-fit__items li::before {
  content: "▸";
  flex: none;
  font-size: 11px;
  color: var(--ky-cyan);
}

.pd-fit__media {
  margin: clamp(24px, 3.6vw, 38px) 0 0;
  border: 2px solid var(--ky-line);
  background: var(--ky-deep);
  box-shadow: var(--pd-shadow-cyan);
}

.pd-fit__media img {
  display: block;
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.pd-node-note {
  margin: 22px 0 0;
  padding: 18px 20px;
  border-left: 4px solid var(--ky-signal);
  background: rgba(255, 90, 60, .08);
  font-size: 15px;
  line-height: 1.8;
  color: var(--ky-paper);
}

/* ---------- 版本时间线 ---------- */
.pd-version-copy {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.pd-version-copy__val {
  font-size: 20px;
  letter-spacing: .08em;
  color: var(--ky-gold);
}

.pd-copy {
  font-family: var(--ky-sans);
  font-size: 13px;
  padding: 8px 14px;
  color: var(--ky-cyan);
  background: transparent;
  border: 2px solid var(--ky-cyan);
  cursor: pointer;
  transition: background .2s var(--ky-ease), color .2s var(--ky-ease);
}

.pd-copy:hover {
  background: var(--ky-cyan);
  color: var(--ky-night);
}

.page-products .pd-copy__status,
.page-products .ky-copy__status {
  font-size: 13px;
  color: var(--ky-cyan);
}

.pd-vers {
  position: relative;
  list-style: none;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
}

.pd-vers::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--ky-line);
}

.pd-vers__item {
  position: relative;
  padding: 0 0 30px 34px;
}

.pd-vers__item:last-child {
  padding-bottom: 0;
}

.pd-vers__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 14px;
  height: 14px;
  background: var(--ky-deep);
  border: 2px solid var(--ky-cyan);
  transform: rotate(45deg);
  transition: background .3s var(--ky-ease), box-shadow .3s var(--ky-ease);
}

.pd-vers__item.is-active::before {
  background: var(--ky-cyan);
  box-shadow: 0 0 0 5px rgba(33, 230, 193, .16);
}

.pd-vers__time {
  display: block;
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--ky-gold);
}

.pd-vers__title {
  margin: 10px 0 10px;
  font-size: clamp(17px, 2.2vw, 20px);
  line-height: 1.4;
  color: var(--ky-paper);
}

.pd-vers__body {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ky-mist);
  max-width: 30em;
}

/* ---------- 收尾 ---------- */
.pd-cta__box {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.4vw, 36px);
  align-items: center;
  padding: clamp(26px, 4vw, 44px);
  background: var(--ky-deep);
  border: 2px solid var(--ky-line);
  box-shadow: var(--pd-shadow-signal);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 36px), calc(100% - 36px) 100%, 0 100%);
}

.pd-cta__text {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ky-mist);
  max-width: 40em;
}

.pd-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .pd-tree {
    display: block;
    margin: 0 0 20px;
  }

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

  .pd-step:nth-child(2) {
    margin-top: 30px;
  }

  .pd-step:nth-child(3) {
    margin-top: 14px;
  }

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

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

@media (min-width: 900px) {
  .pd-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(280px, .92fr);
    align-items: end;
  }

  .pd-hero__frame {
    margin-bottom: 16px;
  }

  .pd-panel__grid {
    grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
  }

  .pd-panel__grid--flip .pd-panel__media {
    order: 1;
  }

  .pd-panel__grid--flip .pd-panel__body {
    order: 2;
  }
}

@media (min-width: 940px) {
  .pd-vers {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
    padding-top: 34px;
    border-top: 2px solid var(--ky-line);
  }

  .pd-vers::before {
    display: none;
  }

  .pd-vers__item {
    padding: 0 24px 0 0;
  }

  .pd-vers__item::before {
    top: -41px;
    left: 0;
  }

  .pd-vers__body {
    max-width: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products *,
  .page-products *::before,
  .page-products *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }

  .pd-panel__tag--live::before {
    animation: none;
  }
}