.page-products {
  --ps-pad: 22px;
  --ps-gap: 18px;
  overflow-x: hidden;
}

.page-products .ps-hero {
  padding-top: 36px;
  padding-bottom: 56px;
}

.page-products .ps-hero__grid {
  display: grid;
  gap: 32px;
  margin-top: 22px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.page-products .ps-hero__lead {
  position: relative;
}

.page-products .ps-guide {
  display: none;
  position: absolute;
  right: -34px;
  bottom: 12px;
  width: 150px;
  height: 1px;
  background: var(--line);
  transform: rotate(-15deg);
  transform-origin: right center;
}

.page-products .ps-hero__title {
  margin: 14px 0 0;
  font-size: clamp(38px, 10.5vw, 92px);
  line-height: 0.96;
  letter-spacing: -0.03em;
  color: var(--white);
}

.page-products .ps-hero__title-sub {
  display: block;
  margin-top: 12px;
  font-size: clamp(18px, 4.6vw, 34px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--cyan);
}

.page-products .ps-hero__intro {
  margin: 20px 0 0;
  max-width: 36em;
  font-size: var(--f-15);
  line-height: 1.85;
  color: var(--mist);
}

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

.page-products .ps-hero__panel {
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--deck);
  padding: 20px 18px;
  box-shadow: var(--shadow);
}

.page-products .ps-panel__label {
  margin: 0;
  font-size: var(--f-12);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-products .ps-quick {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
}

.page-products .ps-quick__item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 14px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
  font-size: var(--f-14);
}

.page-products .ps-quick__item:last-child {
  border-bottom: 0;
}

.page-products .ps-quick__name {
  color: var(--white);
  font-weight: 600;
}

.page-products .ps-quick__meta {
  color: var(--mist);
  font-size: var(--f-12);
  letter-spacing: 0.08em;
  flex: none;
}

.page-products .ps-panel__note {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: var(--f-12);
  line-height: 1.7;
  color: var(--mist);
}

.page-products .section {
  padding: clamp(48px, 8vw, 96px) 0;
}

.page-products .section--deck {
  background: var(--section);
}

.page-products .section--band {
  background: var(--deck);
}

.page-products .section__head {
  margin-bottom: clamp(28px, 5vw, 48px);
}

.page-products .section__index {
  margin: 0;
  font-size: var(--f-14);
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.page-products .section__title {
  margin: 10px 0 0;
  font-size: clamp(24px, 4.6vw, 40px);
  line-height: 1.25;
  letter-spacing: -0.015em;
  color: var(--white);
}

.page-products .section__sub {
  margin: 12px 0 0;
  max-width: 48ch;
  font-size: var(--f-15);
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 01 注册 ---------- */

.page-products .ps-reg__body {
  display: grid;
  gap: 30px;
}

.page-products .ps-reg__figure .figure__frame {
  aspect-ratio: 1 / 1;
  max-width: 340px;
}

.page-products .ps-flow {
  display: block;
  width: 100%;
  height: 44px;
  margin: 0 0 8px;
}

.page-products .ps-flow__line {
  stroke: var(--line);
  stroke-width: 1;
}

.page-products .ps-flow__node {
  fill: var(--cyan);
}

.page-products .ps-flow__node--end {
  fill: none;
  stroke: var(--orange);
  stroke-width: 1.5;
}

.page-products .ps-steps {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-products .ps-step {
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

.page-products .ps-step:last-child {
  border-bottom: 1px solid var(--line);
}

.page-products .ps-step__no {
  display: block;
  font-size: var(--f-12);
  letter-spacing: 0.18em;
  color: var(--orange);
}

.page-products .ps-step__title {
  margin: 10px 0 8px;
  font-size: var(--f-24);
  line-height: 1.3;
  color: var(--white);
}

.page-products .ps-step p {
  margin: 0;
  max-width: 34em;
  font-size: var(--f-15);
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 02 四端 ---------- */

.page-products .ps-decks__grid {
  display: grid;
  gap: var(--ps-gap);
}

.page-products .ps-deck {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--deck);
  padding: var(--ps-pad);
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.page-products .ps-deck::before {
  content: "";
  display: block;
  width: 30px;
  height: 3px;
  margin-bottom: 16px;
  background: var(--cyan);
}

.page-products .ps-deck--b::before {
  background: var(--cyan-deep);
}

.page-products .ps-deck--c::before {
  background: var(--mid);
}

.page-products .ps-deck--d::before {
  background: var(--orange);
}

.page-products .ps-deck:hover,
.page-products .ps-deck:focus-within {
  border-color: var(--cyan);
  transform: translateY(-2px);
}

.page-products .ps-deck__name {
  margin: 0;
  font-size: var(--f-18);
  line-height: 1.35;
  color: var(--white);
}

.page-products .ps-deck__for {
  margin: 10px 0 0;
  font-size: var(--f-14);
  line-height: 1.75;
  color: var(--mist);
}

.page-products .ps-deck__specs {
  list-style: none;
  margin: 18px 0 0;
  padding: 14px 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 9px;
}

.page-products .ps-deck__specs li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
  font-family: var(--mono);
  font-size: var(--f-12);
  letter-spacing: 0.04em;
}

.page-products .ps-deck__specs li span:first-child {
  color: var(--mist);
}

.page-products .ps-deck__specs li span:last-child {
  color: var(--white);
  text-align: right;
}

.page-products .ps-decks__figure {
  margin: clamp(30px, 5vw, 52px) 0 0;
}

.page-products .ps-decks__figure .figure__frame {
  aspect-ratio: 16 / 10;
}

/* ---------- 03 小屏登录 ---------- */

.page-products .ps-small__grid {
  display: grid;
  gap: 30px;
}

.page-products .ps-ticks {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-products .ps-ticks li {
  position: relative;
  padding-left: 22px;
  font-size: var(--f-15);
  line-height: 1.8;
  color: var(--mist);
}

.page-products .ps-ticks li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.66em;
  width: 8px;
  height: 8px;
  background: var(--cyan);
  transform: rotate(45deg);
}

.page-products .ps-small__figure .figure__frame {
  aspect-ratio: 3 / 2;
}

/* ---------- 04 提醒 ---------- */

.page-products .ps-alert__grid {
  display: grid;
  gap: 30px;
}

.page-products .ps-switches {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-products .ps-switch {
  display: flex;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--deck);
  padding: 14px 16px;
  transition: border-color 0.18s ease;
}

.page-products .ps-switch:hover {
  border-color: var(--cyan-deep);
}

.page-products .ps-switch__label {
  font-size: var(--f-14);
  color: var(--white);
}

.page-products .ps-switch__state {
  margin-left: auto;
  font-size: var(--f-12);
  color: var(--mist);
}

.page-products .ps-switch__pill {
  position: relative;
  flex: none;
  width: 34px;
  height: 18px;
  border-radius: 999px;
  background: var(--cyan);
}

.page-products .ps-switch__pill::after {
  content: "";
  position: absolute;
  top: 2px;
  right: 2px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--ink);
}

.page-products .ps-pref {
  margin-top: 22px;
  border-left: 2px solid var(--orange);
  padding: 4px 0 4px 16px;
}

.page-products .ps-pref__title {
  margin: 0;
  font-size: var(--f-18);
  color: var(--white);
}

.page-products .ps-pref p {
  margin: 8px 0 0;
  max-width: 36em;
  font-size: var(--f-14);
  line-height: 1.8;
  color: var(--mist);
}

.page-products .ps-alert__figure .figure__frame {
  aspect-ratio: 3 / 2;
}

.page-products .ps-alert__figure {
  margin: 0;
}

/* ---------- 05 版本 ---------- */

.page-products .ps-version__figure {
  margin: 0 0 clamp(26px, 4vw, 40px);
}

.page-products .ps-version__figure .figure__frame {
  aspect-ratio: 16 / 9;
}

.page-products .ps-versions {
  border-top: 1px solid var(--line);
}

.page-products .ps-version {
  border-bottom: 1px solid var(--line);
}

.page-products .ps-version__summary {
  list-style: none;
  cursor: pointer;
  position: relative;
  display: grid;
  gap: 6px;
  padding: 20px 36px 20px 0;
}

.page-products .ps-version__summary::-webkit-details-marker {
  display: none;
}

.page-products .ps-version__summary::after {
  content: "";
  position: absolute;
  right: 8px;
  top: 50%;
  width: 9px;
  height: 9px;
  margin-top: -6px;
  border-right: 1px solid var(--mist);
  border-bottom: 1px solid var(--mist);
  transform: rotate(45deg);
  transition: transform 0.18s ease;
}

.page-products .ps-version[open] .ps-version__summary::after {
  transform: rotate(-135deg);
}

.page-products .ps-version__no {
  font-size: var(--f-14);
  letter-spacing: 0.14em;
  color: var(--orange);
}

.page-products .ps-version__name {
  font-size: var(--f-18);
  line-height: 1.4;
  color: var(--white);
  transition: color 0.18s ease;
}

.page-products .ps-version__summary:hover .ps-version__name {
  color: var(--cyan);
}

.page-products .ps-version__tag {
  font-size: var(--f-12);
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-products .ps-version__items {
  list-style: none;
  margin: 0;
  padding: 0 0 22px;
  display: grid;
  gap: 10px;
}

.page-products .ps-version__items li {
  position: relative;
  padding-left: 18px;
  font-size: var(--f-14);
  line-height: 1.75;
  color: var(--mist);
}

.page-products .ps-version__items li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 1px;
  background: var(--mid);
}

.page-products .ps-versions__more {
  margin: 22px 0 0;
  font-size: var(--f-14);
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 06 设备要求 ---------- */

.page-products .ps-req__grid {
  display: grid;
  gap: 1px;
  border: 1px solid var(--line);
  background: var(--line);
}

.page-products .ps-req__col {
  background: var(--ink);
  padding: 24px 20px;
}

.page-products .ps-req__head {
  margin: 0;
  font-size: var(--f-18);
  color: var(--white);
}

.page-products .ps-spec {
  margin: 16px 0 0;
  display: grid;
  gap: 12px;
}

.page-products .ps-spec div {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 9px;
  border-bottom: 1px dotted var(--line);
}

.page-products .ps-spec div:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-products .ps-spec dt {
  font-size: var(--f-14);
  color: var(--mist);
}

.page-products .ps-spec dd {
  margin: 0;
  font-family: var(--mono);
  font-size: var(--f-14);
  color: var(--cyan);
  text-align: right;
}

.page-products .ps-req__text {
  margin: 16px 0 0;
  font-size: var(--f-14);
  line-height: 1.8;
  color: var(--mist);
}

.page-products .ps-req__more {
  margin: 24px 0 0;
  font-size: var(--f-14);
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 07 疑难 ---------- */

.page-products .ps-help__grid {
  display: grid;
  gap: 16px;
}

.page-products .ps-help__card {
  display: block;
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--deck);
  padding: 22px 20px;
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.page-products .ps-help__card:hover,
.page-products .ps-help__card:focus-visible {
  border-color: var(--cyan);
  transform: translateY(-2px);
}

.page-products .ps-help__q {
  margin: 0;
  font-size: var(--f-18);
  line-height: 1.4;
  color: var(--white);
}

.page-products .ps-help__a {
  margin: 10px 0 0;
  font-size: var(--f-14);
  line-height: 1.75;
  color: var(--mist);
}

.page-products .ps-help__go {
  display: inline-block;
  margin-top: 16px;
  font-size: var(--f-12);
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-products .ps-cta {
  display: grid;
  gap: 16px;
  margin-top: 30px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--ink);
  padding: 26px 22px;
}

.page-products .ps-cta__text {
  margin: 0;
  max-width: 52em;
  font-size: var(--f-14);
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 桌面端 ---------- */

@media (min-width: 720px) {
  .page-products .ps-decks__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-products .ps-help__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-products .ps-req__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-products .ps-switches {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-products .ps-version__summary {
    grid-template-columns: 84px minmax(0, 1fr) auto;
    align-items: center;
    gap: 26px;
  }
}

@media (min-width: 900px) {
  .page-products .ps-hero {
    padding-top: 58px;
    padding-bottom: 78px;
  }

  .page-products .ps-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 56px;
    align-items: end;
  }

  .page-products .ps-guide {
    display: block;
  }

  .page-products .ps-reg__body {
    grid-template-columns: minmax(0, 340px) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-products .ps-steps {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 34px;
    border-top: 1px solid var(--line);
  }

  .page-products .ps-step {
    border-top: 0;
    padding-top: 24px;
  }

  .page-products .ps-step:last-child {
    border-bottom: 0;
  }

  .page-products .ps-small__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 56px;
    align-items: center;
  }

  .page-products .ps-alert__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 52px;
    align-items: start;
  }

  .page-products .ps-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
    padding: 30px 28px;
  }
}

@media (min-width: 1080px) {
  .page-products .ps-decks__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    align-items: start;
    gap: 20px;
  }

  .page-products .ps-deck:nth-child(1) {
    margin-top: 0;
  }

  .page-products .ps-deck:nth-child(2) {
    margin-top: 36px;
  }

  .page-products .ps-deck:nth-child(3) {
    margin-top: 12px;
  }

  .page-products .ps-deck:nth-child(4) {
    margin-top: 52px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .ps-deck,
  .page-products .ps-help__card,
  .page-products .ps-version__summary::after,
  .page-products .ps-version__name {
    transition: none;
  }
}