.page-products {
  --dl-gap: clamp(12px, 2vw, 22px);
  --dl-radius: 6px;
  --dl-section-gap: clamp(56px, 8vw, 100px);
  --dl-card-bg: #16362E;
  background: var(--ink-900);
  color: var(--paper);
  padding-bottom: clamp(56px, 8vw, 104px);
}

.page-products .breadcrumb {
  padding-top: clamp(14px, 3vw, 26px);
  padding-bottom: clamp(10px, 2vw, 18px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.page-products .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-products .breadcrumb__link {
  color: var(--signal-soft);
  text-decoration: none;
}

.page-products .breadcrumb__link:hover {
  color: var(--signal);
}

.page-products .breadcrumb__sep {
  color: var(--line-strong);
}

.page-products .breadcrumb__item[aria-current="page"] {
  color: var(--paper);
}

/* ---------- 首屏与下载卡 ---------- */
.page-products .dl-hero {
  padding-top: clamp(4px, 1.4vw, 14px);
}

.page-products .dl-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 4vw, 40px);
  align-items: end;
}

.page-products .dl-hero__copy h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-size: clamp(32px, 5.4vw, 60px);
  line-height: 1.04;
  font-weight: 800;
  letter-spacing: -0.01em;
  text-wrap: balance;
}

.page-products .dl-hero__lede {
  max-width: 56ch;
  margin: 0 0 clamp(18px, 3vw, 26px);
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.8;
  color: var(--silver);
}

.page-products .dl-hero__meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--dl-radius);
  overflow: hidden;
}

.page-products .dl-hero__meta li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 14px;
  background: var(--ink-800);
}

.page-products .dl-hero__meta span {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-products .dl-hero__meta b {
  font-family: var(--font-mono);
  font-size: clamp(13px, 1.3vw, 15px);
  font-weight: 600;
  color: var(--paper);
}

.page-products .dl-hero__visual {
  margin: 0;
  overflow: hidden;
  border-radius: var(--dl-radius);
  border: 1px solid var(--line-soft);
  background: var(--ink-700);
}

.page-products .dl-hero__visual img {
  display: block;
  width: 100%;
  height: auto;
  filter: saturate(0.85) contrast(1.04);
}

.page-products .dl-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--dl-gap);
  margin-top: clamp(24px, 4vw, 44px);
}

.page-products .dl-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-radius: var(--dl-radius);
  border: 1px solid var(--line-soft);
  background: var(--dl-card-bg);
  transition: border-color 180ms ease, transform 180ms ease;
}

.page-products .dl-card:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}

.page-products .dl-card--ios {
  border-color: rgba(0, 240, 200, 0.5);
  box-shadow: inset 0 0 0 1px rgba(0, 240, 200, 0.16);
}

.page-products .dl-card--ios:hover {
  border-color: var(--signal);
}

.page-products .dl-card__visual {
  margin: 0;
  aspect-ratio: 4 / 5;
  overflow: hidden;
  background: var(--ink-800);
}

.page-products .dl-card__visual img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.9) contrast(1.05);
}

.page-products .dl-card__body {
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
  padding: clamp(16px, 2.4vw, 24px);
}

.page-products .dl-card__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--signal);
}

.page-products .dl-card--android .dl-card__kicker,
.page-products .dl-card--web .dl-card__kicker {
  color: var(--warm);
}

.page-products .dl-card__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(21px, 2.5vw, 27px);
  line-height: 1.12;
  font-weight: 800;
}

.page-products .dl-card__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--silver);
}

.page-products .dl-specs {
  margin: 2px 0 4px;
  padding: 0;
  border-top: 1px solid var(--line-soft);
}

.page-products .dl-specs__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 13px;
}

.page-products .dl-specs__row dt {
  margin: 0;
  color: var(--muted);
  letter-spacing: 0.02em;
}

.page-products .dl-specs__row dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  text-align: right;
  color: var(--paper);
}

.page-products .dl-card__cta {
  margin-top: auto;
  align-self: flex-start;
}

/* ---------- 注册流程 ---------- */
.page-products .reg-flow {
  margin-top: var(--dl-section-gap);
}

.page-products .reg-flow__head {
  max-width: 76ch;
}

.page-products .reg-flow__head h2 {
  margin: 8px 0 14px;
  font-family: var(--font-display);
  font-size: clamp(26px, 3.6vw, 40px);
  line-height: 1.1;
  font-weight: 800;
}

.page-products .reg-flow__lede {
  margin: 0;
  font-size: clamp(15px, 1.4vw, 16.5px);
  line-height: 1.85;
  color: var(--silver);
}

.page-products .reg-steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--dl-gap);
  margin: clamp(24px, 4vw, 38px) 0 0;
  padding: 0;
  list-style: none;
}

.page-products .reg-step {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 18px 22px;
  border-radius: var(--dl-radius);
  border: 1px solid var(--line-soft);
  background: var(--dl-card-bg);
}

.page-products .reg-step:nth-child(3) {
  background: linear-gradient(155deg, #1E463B 0%, #16362E 72%);
  border-color: rgba(255, 138, 61, 0.48);
}

.page-products .reg-step__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--signal);
}

.page-products .reg-step:nth-child(3) .reg-step__num {
  color: var(--warm);
}

.page-products .reg-step__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 17px;
  line-height: 1.35;
  font-weight: 800;
}

.page-products .reg-step__text {
  flex: 1;
  margin: 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--silver);
}

.page-products .reg-step__time {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-products .reg-flow__visual {
  margin: clamp(24px, 3.6vw, 36px) 0 0;
  overflow: hidden;
  border-radius: var(--dl-radius);
  border: 1px solid var(--line-soft);
  background: var(--ink-700);
}

.page-products .reg-flow__visual img {
  display: block;
  width: 100%;
  height: auto;
  filter: saturate(0.88) contrast(1.04);
}

.page-products .reg-flow__visual figcaption {
  padding: 12px 16px 14px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
  border-top: 1px solid var(--line-soft);
}

/* ---------- 版本时间轴 ---------- */
.page-products .vt {
  margin-top: var(--dl-section-gap);
}

.page-products .vt__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 44px);
  align-items: start;
}

.page-products .vt__aside h2 {
  margin: 8px 0 14px;
  font-family: var(--font-display);
  font-size: clamp(26px, 3.6vw, 40px);
  line-height: 1.1;
  font-weight: 800;
}

.page-products .vt__lede {
  margin: 0 0 clamp(20px, 3vw, 28px);
  font-size: clamp(15px, 1.4vw, 16.5px);
  line-height: 1.85;
  color: var(--silver);
}

.page-products .vt__visual {
  margin: 0;
  overflow: hidden;
  border-radius: var(--dl-radius);
  border: 1px solid var(--line-soft);
  background: var(--ink-700);
}

.page-products .vt__visual img {
  display: block;
  width: 100%;
  height: auto;
  filter: saturate(0.88) contrast(1.05);
}

.page-products .vt__visual figcaption {
  padding: 12px 16px 14px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
  border-top: 1px solid var(--line-soft);
}

.page-products .vt__track {
  position: relative;
  display: flex;
  flex-direction: column;
  margin: 0;
  padding: 0 0 0 20px;
  list-style: none;
  border-left: 1px solid var(--line-soft);
}

.page-products .vt-node {
  position: relative;
  padding: 2px 0 26px;
}

.page-products .vt-node:last-child {
  padding-bottom: 0;
}

.page-products .vt-node::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 8px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink-700);
  border: 1px solid var(--line-strong);
}

.page-products .vt-node--current::before {
  background: var(--signal);
  border-color: var(--signal);
  box-shadow: 0 0 0 3px rgba(0, 240, 200, 0.18);
}

.page-products .vt-node__mark {
  display: inline-block;
  padding: 2px 7px;
  border-radius: 2px;
  border: 1px solid var(--line-strong);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--silver);
}

.page-products .vt-node--current .vt-node__mark {
  color: var(--signal);
  border-color: rgba(0, 240, 200, 0.45);
}

.page-products .vt-node__title {
  margin: 10px 0 6px;
  font-family: var(--font-display);
  font-size: 18px;
  line-height: 1.32;
  font-weight: 800;
}

.page-products .vt-node__text {
  margin: 0 0 8px;
  font-size: 14px;
  line-height: 1.78;
  color: var(--silver);
}

.page-products .vt-node__meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.09em;
  color: var(--muted);
}

/* ---------- 设备要求 ---------- */
.page-products .device {
  margin-top: var(--dl-section-gap);
}

.page-products .device__head {
  max-width: 72ch;
}

.page-products .device__head h2 {
  margin: 8px 0 14px;
  font-family: var(--font-display);
  font-size: clamp(26px, 3.6vw, 40px);
  line-height: 1.1;
  font-weight: 800;
}

.page-products .device__lede {
  margin: 0;
  font-size: clamp(15px, 1.4vw, 16.5px);
  line-height: 1.85;
  color: var(--silver);
}

.page-products .device__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3.4vw, 40px);
  margin-top: clamp(22px, 3.6vw, 36px);
  align-items: start;
}

.page-products .device__sub {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--signal-soft);
}

.page-products .device__sub + .dl-specs {
  margin-top: 0;
}

.page-products .device__specs .dl-specs {
  margin-bottom: clamp(22px, 3vw, 30px);
}

.page-products .dl-specs--wide .dl-specs__row {
  padding: 10px 0;
  font-size: 14px;
}

.page-products .device__steps {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
}

.page-products .device__steps li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-soft);
  font-size: 14px;
  line-height: 1.72;
  color: var(--silver);
}

.page-products .device__steps li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-products .device__steps span {
  flex-shrink: 0;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--warm);
}

.page-products .device__visual {
  margin: 0;
  overflow: hidden;
  border-radius: var(--dl-radius);
  border: 1px solid var(--line-soft);
  background: var(--ink-700);
}

.page-products .device__visual img {
  display: block;
  width: 100%;
  height: auto;
  filter: saturate(0.88) contrast(1.04);
}

/* ---------- 安装与安全 ---------- */
.page-products .verify {
  margin-top: var(--dl-section-gap);
}

.page-products .verify__head {
  max-width: 70ch;
}

.page-products .verify__head h2 {
  margin: 8px 0 14px;
  font-family: var(--font-display);
  font-size: clamp(26px, 3.6vw, 40px);
  line-height: 1.1;
  font-weight: 800;
}

.page-products .verify__lede {
  margin: 0;
  font-size: clamp(15px, 1.4vw, 16.5px);
  line-height: 1.85;
  color: var(--silver);
}

.page-products .verify__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--dl-gap);
  margin-top: clamp(22px, 3.6vw, 36px);
}

.page-products .verify__item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px;
  border-radius: var(--dl-radius);
  border: 1px solid var(--line-soft);
  background: var(--ink-800);
}

.page-products .verify__mark {
  align-self: flex-start;
  padding: 3px 8px;
  border-radius: 2px;
  background: var(--signal);
  color: var(--ink-900);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.page-products .verify__item:nth-child(2) .verify__mark {
  background: var(--silver);
}

.page-products .verify__item:nth-child(3) .verify__mark {
  background: var(--warm);
  color: var(--ink-900);
}

.page-products .verify__item h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 18px;
  line-height: 1.35;
  font-weight: 800;
}

.page-products .verify__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--silver);
}

.page-products .verify__note {
  margin: clamp(18px, 2.6vw, 24px) 0 0;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--muted);
}

.page-products .verify__note a,
.page-products .checklist__foot a {
  color: var(--signal-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-products .verify__note a:hover,
.page-products .checklist__foot a:hover {
  color: var(--signal);
}

/* ---------- 检查清单 ---------- */
.page-products .checklist {
  margin-top: var(--dl-section-gap);
}

.page-products .checklist__head {
  max-width: 70ch;
}

.page-products .checklist__head h2 {
  margin: 8px 0 14px;
  font-family: var(--font-display);
  font-size: clamp(26px, 3.6vw, 40px);
  line-height: 1.1;
  font-weight: 800;
}

.page-products .checklist__lede {
  margin: 0;
  font-size: clamp(15px, 1.4vw, 16.5px);
  line-height: 1.85;
  color: var(--silver);
}

.page-products .checklist__list {
  margin: clamp(22px, 3.6vw, 36px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-soft);
}

.page-products .checklist__item {
  position: relative;
  border-bottom: 1px solid var(--line-soft);
}

.page-products .checklist__input {
  position: absolute;
  top: 20px;
  left: 4px;
  width: 1px;
  height: 1px;
  opacity: 0;
  overflow: hidden;
  white-space: nowrap;
}

.page-products .checklist__label {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 16px 4px;
  cursor: pointer;
  font-size: 15px;
  line-height: 1.7;
  color: var(--silver);
  transition: color 160ms ease;
}

.page-products .checklist__label:hover {
  color: var(--paper);
}

.page-products .checklist__box {
  position: relative;
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  margin-top: 2px;
  border-radius: 2px;
  border: 1px solid var(--line-strong);
  background: transparent;
  transition: background 160ms ease, border-color 160ms ease;
}

.page-products .checklist__input:checked + .checklist__label .checklist__box {
  background: var(--signal);
  border-color: var(--signal);
}

.page-products .checklist__input:checked + .checklist__label .checklist__box::after {
  content: "";
  position: absolute;
  left: 7px;
  top: 2px;
  width: 6px;
  height: 12px;
  border: solid var(--ink-900);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.page-products .checklist__input:checked + .checklist__label .checklist__text {
  color: var(--paper);
  text-decoration: line-through;
  text-decoration-color: var(--muted);
}

.page-products .checklist__input:focus-visible + .checklist__label .checklist__box {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

.page-products .checklist__foot {
  margin-top: 22px;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--muted);
}

.page-products .checklist__foot p {
  margin: 0;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-products .dl-hero__meta {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (min-width: 860px) {
  .page-products .dl-hero__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }

  .page-products .dl-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-products .device__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }

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

@media (min-width: 1024px) {
  .page-products .vt__grid {
    grid-template-columns: minmax(0, 0.44fr) minmax(0, 0.56fr);
    gap: clamp(32px, 4vw, 56px);
  }

  .page-products .reg-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    align-items: stretch;
  }

  .page-products .reg-steps::before {
    content: "";
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .dl-card,
  .page-products .checklist__label,
  .page-products .checklist__box {
    transition: none;
  }

  .page-products .dl-card:hover {
    transform: none;
  }
}
<<<END>>>