.page-products {
  --dl-line: rgba(169, 162, 214, .28);
  --dl-line-soft: rgba(58, 46, 122, .65);
  --dl-fill: rgba(22, 20, 56, .62);
}

/* ============ 首屏框景 ============ */
.page-products .dl-hero__frame {
  position: relative;
  margin-top: 22px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 44px);
  padding: clamp(24px, 4vw, 48px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(255, 62, 143, .18), transparent 62%),
    radial-gradient(90% 80% at 6% 100%, rgba(53, 230, 224, .12), transparent 60%),
    linear-gradient(155deg, rgba(42, 23, 88, .85), rgba(11, 10, 36, .96));
  overflow: hidden;
}

.page-products .dl-hero__frame::before,
.page-products .dl-hero__frame::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  width: 12px;
  background-image: repeating-linear-gradient(to bottom, var(--line) 0 1px, transparent 1px 10px);
  opacity: .75;
  pointer-events: none;
}

.page-products .dl-hero__frame::before { left: 0; }
.page-products .dl-hero__frame::after { right: 0; }

.page-products .dl-hero__body h1 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 5.2vw, 58px);
  line-height: 1.12;
  letter-spacing: .01em;
}

.page-products .dl-hero__body .lede {
  margin: 18px 0 0;
  max-width: 62ch;
  color: var(--text-dim);
  font-size: var(--fs-17);
  line-height: 1.75;
}

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

.page-products .dl-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 32px;
  margin: 28px 0 0;
  padding-top: 20px;
  border-top: 1px dashed var(--dl-line);
}

.page-products .dl-hero__stats > div {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.page-products .dl-hero__stats dt {
  font-size: var(--fs-12);
  letter-spacing: .14em;
  color: var(--text-dim);
}

.page-products .dl-hero__stats dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-17);
  font-weight: 700;
  color: var(--lime);
}

.page-products .dl-hero__media {
  position: relative;
  margin: 0;
  aspect-ratio: 3 / 2;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-products .dl-hero__media img,
.page-products .install-grid__media img,
.page-products .migrate__media img,
.page-products .trouble__media img,
.page-products .dl-next__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ============ 区块标题 ============ */
.page-products .sec-head {
  max-width: 70ch;
  margin-bottom: 30px;
}

.page-products .sec-head h2 {
  margin: 8px 0 0;
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.25;
}

.page-products .sec-head__note {
  margin: 14px 0 0;
  color: var(--text-dim);
  font-size: var(--fs-14);
  line-height: 1.7;
}

/* ============ 版本台翻面卡 ============ */
.page-products .ver-deck {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-products .ver-card {
  perspective: 1200px;
  cursor: pointer;
  outline-offset: 6px;
}

.page-products .ver-card:focus-visible {
  outline: 2px solid var(--lime);
}

.page-products .ver-card .flip-card__inner {
  position: relative;
  display: grid;
  width: 100%;
  transform-style: preserve-3d;
  transition: transform 240ms var(--ease);
}

.page-products .ver-card:hover .flip-card__inner,
.page-products .ver-card:focus-within .flip-card__inner,
.page-products .ver-card:focus .flip-card__inner {
  transform: rotateY(180deg);
}

.page-products .ver-card .flip-card__face {
  grid-area: 1 / 1;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(20px, 2.4vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  overflow: hidden;
}

.page-products .ver-card .flip-card__face--back {
  transform: rotateY(180deg);
}

.page-products .ver-face--pc {
  background: linear-gradient(165deg, rgba(255, 62, 143, .24), var(--card-back-a) 48%, var(--ink-900));
  box-shadow: inset 0 3px 0 var(--magenta);
}

.page-products .ver-face--old {
  background: linear-gradient(165deg, rgba(53, 230, 224, .18), var(--ink-750) 48%, var(--ink-900));
  box-shadow: inset 0 3px 0 var(--cyan);
}

.page-products .ver-face--android {
  background: linear-gradient(165deg, rgba(184, 255, 60, .18), var(--ink-800) 48%, var(--ink-900));
  box-shadow: inset 0 3px 0 var(--lime);
}

.page-products .ver-face__name {
  margin: 4px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 2.4vw, 28px);
  line-height: 1.15;
}

.page-products .ver-face__os {
  margin: 0;
  font-size: var(--fs-12);
  color: var(--text-dim);
  letter-spacing: .04em;
}

.page-products .ver-face__spec {
  list-style: none;
  margin: 6px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
  font-size: var(--fs-14);
}

.page-products .ver-face__spec li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--dl-line-soft);
}

.page-products .ver-face__k { color: var(--text-dim); }

.page-products .ver-face__v {
  font-weight: 700;
  text-align: right;
}

.page-products .ver-face__hint {
  margin: auto 0 0;
  padding-top: 12px;
  font-size: var(--fs-12);
  line-height: 1.7;
  color: var(--text-dim);
}

.page-products .ver-face--back {
  border-color: #4A3A96;
  background: linear-gradient(160deg, var(--card-back-a), var(--card-back-b));
}

.page-products .ver-face__back-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .18em;
  color: var(--amber);
  text-transform: uppercase;
}

.page-products .ver-face__back-text {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--text);
}

/* ============ 下载前先看三件事 ============ */
.page-products .precheck {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-products .precheck__row {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 6px 16px;
  align-items: start;
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  border-radius: var(--radius);
  background: var(--glass);
  transition: border-color 200ms var(--ease), background 200ms var(--ease);
}

.page-products .precheck__row:nth-child(2) { border-left-color: var(--amber); }
.page-products .precheck__row:nth-child(3) { border-left-color: var(--lime); }

.page-products .precheck__row:hover {
  border-color: var(--lime);
  background: var(--glass-strong);
}

.page-products .precheck__no {
  font-size: var(--fs-22);
  font-weight: 700;
  color: var(--text-dim);
  line-height: 1.2;
}

.page-products .precheck__body h3 {
  margin: 0;
  font-size: var(--fs-17);
  font-weight: 800;
}

.page-products .precheck__body p {
  margin: 8px 0 0;
  font-size: var(--fs-14);
  line-height: 1.78;
  color: var(--text-dim);
}

.page-products .precheck__row .tag {
  grid-column: 2;
  justify-self: start;
  margin-top: 12px;
}

/* ============ 安装五步轨 ============ */
.page-products .install-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
}

.page-products .step-rail {
  list-style: none;
  position: relative;
  margin: 0;
  padding: 4px 0;
  display: grid;
  gap: 2px;
}

.page-products .step-rail::before {
  content: "";
  position: absolute;
  left: 22px;
  top: 22px;
  bottom: 22px;
  width: 2px;
  background: linear-gradient(to bottom, var(--magenta), var(--cyan) 52%, var(--lime));
  opacity: .55;
  pointer-events: none;
}

.page-products .step-rail__item { position: relative; }

.page-products .step-rail__hit {
  position: relative;
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 16px 16px 16px 0;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 200ms var(--ease);
}

.page-products .step-rail__hit:hover {
  background: rgba(244, 241, 255, .06);
}

.page-products .step-rail__hit:focus-within {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

.page-products .step-rail__box {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-products .step-rail__no {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 2px solid var(--line);
  background: var(--ink-800);
  color: var(--text-dim);
  font-size: var(--fs-14);
  font-weight: 700;
  transition: background 200ms var(--ease), color 200ms var(--ease), border-color 200ms var(--ease);
}

.page-products .step-rail__box:checked + .step-rail__no {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--ink-900);
}

.page-products .step-rail__copy {
  display: grid;
  gap: 5px;
  padding-top: 6px;
}

.page-products .step-rail__copy strong {
  font-size: var(--fs-17);
  font-weight: 800;
}

.page-products .step-rail__copy > span {
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--text-dim);
}

.page-products .step-rail__box:checked ~ .step-rail__copy strong {
  color: var(--text-dim);
  text-decoration: line-through;
}

.page-products .install-grid__media {
  position: relative;
  margin: 0;
  aspect-ratio: 1 / 1;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

/* ============ 换机登录衔接 ============ */
.page-products .migrate {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  padding: clamp(22px, 3vw, 38px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(90% 70% at 100% 0%, rgba(53, 230, 224, .14), transparent 62%),
    linear-gradient(120deg, rgba(22, 20, 56, .92), rgba(11, 10, 36, .94));
}

.page-products .migrate__media {
  margin: 0;
  aspect-ratio: 3 / 2;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-products .migrate__body h2 {
  margin: 8px 0 0;
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.28;
}

.page-products .migrate__body > p {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: var(--fs-17);
  line-height: 1.78;
  color: var(--text-dim);
}

.page-products .migrate__list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-products .migrate__list li {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--dl-line);
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--text-dim);
}

.page-products .migrate__k {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .08em;
  color: var(--cyan);
  padding-top: 3px;
}

.page-products .migrate__body .migrate__note {
  margin-top: 22px;
  font-size: var(--fs-14);
  color: var(--text-dim);
}

/* ============ 报错自查清单 ============ */
.page-products .trouble {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

.page-products .trouble__list {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-products .trouble__item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--dl-fill);
  overflow: hidden;
  transition: border-color 200ms var(--ease);
}

.page-products .trouble__item[open] {
  border-color: #4A3A96;
}

.page-products .trouble__item summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-size: var(--fs-17);
  font-weight: 800;
}

.page-products .trouble__item summary::-webkit-details-marker { display: none; }

.page-products .trouble__q { line-height: 1.5; }

.page-products .trouble__chev {
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--text-dim);
  border-bottom: 2px solid var(--text-dim);
  transform: rotate(45deg);
  transition: transform 200ms var(--ease);
}

.page-products .trouble__item[open] .trouble__chev {
  transform: rotate(-135deg);
}

.page-products .trouble__steps {
  list-style: none;
  counter-reset: tstep;
  margin: 0;
  padding: 0 18px 20px;
  display: grid;
  gap: 10px;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--text-dim);
}

.page-products .trouble__steps li {
  counter-increment: tstep;
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 10px;
}

.page-products .trouble__steps li::before {
  content: counter(tstep, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--amber);
  padding-top: 3px;
}

.page-products .trouble__side {
  display: grid;
  gap: 18px;
  align-content: start;
}

.page-products .trouble__media {
  margin: 0;
  aspect-ratio: 3 / 2;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-products .trouble__help {
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(150deg, rgba(255, 182, 39, .14), rgba(11, 10, 36, .9));
}

.page-products .trouble__help h3 {
  margin: 0;
  font-size: var(--fs-17);
  font-weight: 800;
}

.page-products .trouble__help p {
  margin: 10px 0 0;
  font-size: var(--fs-14);
  line-height: 1.78;
  color: var(--text-dim);
}

/* ============ 装完之后 ============ */
.page-products .dl-next__band {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  padding: clamp(24px, 4vw, 42px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background:
    linear-gradient(100deg, rgba(255, 62, 143, .16), rgba(53, 230, 224, .12) 56%, rgba(184, 255, 60, .16)),
    var(--ink-800);
}

.page-products .dl-next__band::after {
  content: "";
  position: absolute;
  left: -20%;
  right: -20%;
  top: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--magenta), var(--cyan), var(--lime), transparent);
}

.page-products .dl-next__body h2 {
  margin: 8px 0 0;
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.28;
}

.page-products .dl-next__body > p {
  margin: 16px 0 0;
  max-width: 60ch;
  font-size: var(--fs-17);
  line-height: 1.78;
  color: var(--text-dim);
}

.page-products .dl-next__links {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-products .dl-next__links a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 13px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(11, 10, 36, .55);
  color: var(--text);
  font-size: var(--fs-14);
  font-weight: 700;
  text-decoration: none;
  transition: border-color 200ms var(--ease), background 200ms var(--ease), transform 200ms var(--ease);
}

.page-products .dl-next__links a:hover,
.page-products .dl-next__links a:focus-visible {
  border-color: var(--lime);
  background: rgba(184, 255, 60, .1);
  transform: translateX(4px);
  outline: none;
}

.page-products .dl-next__links a span {
  color: var(--lime);
  font-family: var(--font-mono);
}

.page-products .dl-next__media {
  margin: 0;
  aspect-ratio: 2 / 3;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

/* ============ 响应式 ============ */
@media (min-width: 720px) {
  .page-products .precheck__row {
    grid-template-columns: 48px minmax(0, 1fr) auto;
    align-items: center;
  }

  .page-products .precheck__row .tag {
    grid-column: 3;
    margin-top: 0;
  }

  .page-products .ver-deck {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }
}

@media (min-width: 900px) {
  .page-products .dl-hero__frame {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
  }

  .page-products .migrate {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: center;
  }

  .page-products .install-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-products .trouble {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-products .dl-next__band {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
  }
}

@media (min-width: 1080px) {
  .page-products .ver-deck {
    grid-template-columns: 1.08fr 1fr .92fr;
    gap: 22px;
  }
}

@media (max-width: 899px) {
  .page-products .dl-next__media {
    max-width: 320px;
  }
}

@media (max-width: 519px) {
  .page-products .dl-hero__frame::before,
  .page-products .dl-hero__frame::after {
    display: none;
  }

  .page-products .dl-hero__stats {
    gap: 10px 20px;
  }

  .page-products .migrate__list li {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .ver-card .flip-card__inner,
  .page-products .precheck__row,
  .page-products .trouble__item,
  .page-products .trouble__chev,
  .page-products .dl-next__links a,
  .page-products .step-rail__no,
  .page-products .step-rail__hit {
    transition: none;
  }

  .page-products .dl-next__links a:hover,
  .page-products .dl-next__links a:focus-visible {
    transform: none;
  }
}