.page-products {
  --prod-frame-pad: clamp(18px, 3.4vw, 34px);
  --prod-hair: 2px;
}

/* ---------- 首屏 ---------- */
.page-products .hero-section {
  padding-top: clamp(18px, 3vw, 30px);
}

.page-products .hero-frame {
  position: relative;
  padding: var(--prod-frame-pad);
  padding-top: calc(var(--prod-frame-pad) + 14px);
  background:
    repeating-linear-gradient(90deg, rgba(74, 85, 96, .05) 0 1px, transparent 1px 34px),
    linear-gradient(158deg, var(--paper-hi) 0%, var(--lake-soft) 62%, #dbe9ec 100%);
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

.page-products .hero-frame::after {
  content: "";
  position: absolute;
  inset: auto -60px -80px auto;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle at 32% 32%, rgba(217, 166, 74, .28), rgba(217, 166, 74, 0) 68%);
  pointer-events: none;
}

.page-products .hero-grid {
  display: grid;
  gap: clamp(22px, 3.4vw, 40px);
}

.page-products .hero-copy {
  min-width: 0;
}

.page-products .hero-kicker {
  color: var(--lake);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: .04em;
}

.page-products .hero-title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(30px, 5.6vw, 50px);
  line-height: 1.16;
  letter-spacing: -.015em;
  color: var(--ink);
  margin: 10px 0 0;
  max-width: 20ch;
}

.page-products .hero-lede {
  margin-top: 18px;
  max-width: 38ch;
  color: var(--rock);
  font-size: var(--fs-body);
  line-height: 1.85;
}

.page-products .hero-actions {
  margin-top: 22px;
  gap: 10px;
}

.page-products .hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(14px, 3vw, 32px);
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px solid rgba(74, 85, 96, .18);
}

.page-products .hero-meta-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 78px;
}

.page-products .meta-num {
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 700;
  color: var(--lake-deep);
  line-height: 1.1;
}

.page-products .meta-label {
  font-size: var(--fs-xs);
  color: var(--rock);
}

.page-products .hero-quick {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  margin-top: 22px;
}

.page-products .hero-quick-label {
  font-size: var(--fs-xs);
  color: var(--rock);
  letter-spacing: .08em;
}

.page-products .hero-quick-link {
  display: inline-block;
  padding: 6px 14px;
  border-radius: var(--r-pill);
  background: rgba(255, 253, 249, .82);
  border: 1px solid rgba(15, 95, 115, .22);
  color: var(--lake-deep);
  font-size: var(--fs-sm);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-products .hero-quick-link:hover {
  border-color: var(--orange);
  background: var(--orange-tint);
}

.page-products .hero-visual .figure {
  margin: 0;
}

.page-products .hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--r-lg);
  background: linear-gradient(150deg, var(--lake-soft), var(--amber));
}

.page-products .figure-cap {
  margin-top: 10px;
  font-size: var(--fs-xs);
  color: var(--rock);
  line-height: 1.7;
}

/* ---------- 通用章节头 ---------- */
.page-products .section-num {
  display: inline-block;
  font-size: var(--fs-xs);
  letter-spacing: .16em;
  color: var(--orange);
  margin-bottom: 8px;
}

.page-products .section-title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(24px, 3.6vw, 38px);
  line-height: 1.24;
  letter-spacing: -.01em;
  color: var(--ink);
  margin: 0;
  max-width: 24ch;
}

.page-products .section-sub {
  margin-top: 14px;
  max-width: 52ch;
  color: var(--rock);
  line-height: 1.85;
}

/* ---------- 三步核对 ---------- */
.page-products .step-grid {
  margin-top: clamp(22px, 3.6vw, 36px);
}

.page-products .step-card {
  position: relative;
  padding: 24px 22px 22px;
  background: var(--paper-hi);
  border: 1px solid var(--rock-line);
  border-radius: var(--r-lg);
  display: flex;
  flex-direction: column;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-products .step-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  bottom: 22px;
  width: 3px;
  border-radius: var(--r-pill);
  background: var(--lake);
  opacity: .28;
  transition: opacity var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-products .step-card:hover {
  border-color: var(--lake);
  transform: translateY(-2px);
}

.page-products .step-card:hover::before {
  opacity: 1;
  background: var(--orange);
}

.page-products .step-card .card-index {
  font-size: var(--fs-xs);
  letter-spacing: .12em;
  color: var(--lake);
}

.page-products .step-card .card-title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: var(--fs-d4);
  color: var(--ink);
  margin: 12px 0 10px;
}

.page-products .step-card .card-body {
  margin: 0;
  color: var(--rock);
  line-height: 1.85;
  font-size: var(--fs-sm);
}

.page-products .step-note {
  margin-top: clamp(20px, 3vw, 30px);
  padding: 20px 24px;
  background: var(--lake-soft);
  border-radius: var(--r-lg);
  color: var(--rock);
  line-height: 1.9;
}

.page-products .step-note p {
  margin: 0;
}

/* ---------- 三档窗口 ---------- */
.page-products .section-windows {
  background: linear-gradient(180deg, rgba(228, 240, 242, 0) 0%, rgba(228, 240, 242, .72) 24%, rgba(228, 240, 242, 0) 100%);
}

.page-products .window-switch,
.page-products .platform-switch {
  margin-top: clamp(22px, 3.4vw, 32px);
  padding: 20px clamp(16px, 2.6vw, 26px) 24px;
  background: var(--paper-hi);
  border: 1px solid var(--rock-line);
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-soft);
}

.page-products .switch-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--rock-line);
  margin-bottom: 18px;
}

.page-products .switch-tab {
  appearance: none;
  cursor: pointer;
  padding: 9px 20px;
  border-radius: var(--r-pill);
  border: 1px solid var(--rock-line);
  background: var(--paper);
  color: var(--rock);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  letter-spacing: .02em;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

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

.page-products .switch-tab[aria-expanded="true"],
.page-products .switch-tab.is-active {
  background: var(--lake);
  border-color: var(--lake);
  color: var(--paper-hi);
}

.page-products .switch-body {
  min-width: 0;
}

.page-products .switch-title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: var(--fs-d4);
  color: var(--ink);
  margin: 0 0 10px;
}

.page-products .switch-body p {
  margin: 0 0 10px;
  max-width: 62ch;
  color: var(--rock);
  line-height: 1.9;
}

.page-products .switch-meta {
  font-size: var(--fs-xs);
  color: var(--lake);
  letter-spacing: .06em;
}

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

.page-products .plain-list li {
  position: relative;
  padding-left: 22px;
  color: var(--rock);
  line-height: 1.85;
}

.page-products .plain-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 12px;
  width: 10px;
  height: 2px;
  border-radius: var(--r-pill);
  background: var(--amber);
}

.page-products .window-figure {
  margin: clamp(24px, 3.6vw, 38px) 0 0;
}

.page-products .window-figure .figure-img,
.page-products .offline-visual .figure-img,
.page-products .version-figure .figure-img,
.page-products .together-figure .figure-img {
  border-radius: var(--r-lg);
  overflow: hidden;
  background: linear-gradient(140deg, var(--lake-soft), var(--amber));
}

.page-products .window-figure img,
.page-products .offline-visual img,
.page-products .version-figure img,
.page-products .together-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ---------- 离线保存 ---------- */
.page-products .offline-grid {
  margin-top: clamp(22px, 3.4vw, 34px);
  align-items: start;
}

.page-products .offline-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-products .offline-step {
  display: flex;
  gap: 16px;
  padding: 18px 20px;
  background: var(--paper-hi);
  border: 1px solid var(--rock-line);
  border-radius: var(--r-lg);
  transition: border-color var(--dur) var(--ease);
}

.page-products .offline-step:hover {
  border-color: var(--moss);
}

.page-products .offline-idx {
  flex: 0 0 auto;
  font-size: var(--fs-sm);
  color: var(--moss);
  padding-top: 3px;
}

.page-products .offline-title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: var(--fs-body);
  color: var(--ink);
  margin: 0 0 6px;
}

.page-products .offline-step p {
  margin: 0;
  color: var(--rock);
  font-size: var(--fs-sm);
  line-height: 1.8;
}

.page-products .offline-visual {
  display: grid;
  gap: 18px;
}

.page-products .offline-visual .figure {
  margin: 0;
}

.page-products .offline-badge {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: var(--fs-sm);
}

.page-products .offline-meter {
  display: grid;
  gap: 8px;
  padding: 16px 18px;
  background: var(--lake-soft);
  border-radius: var(--r-lg);
}

.page-products .offline-meter-label {
  font-size: var(--fs-xs);
  color: var(--lake-deep);
  letter-spacing: .04em;
}

.page-products .offline-meter-track {
  display: block;
  height: 6px;
  border-radius: var(--r-pill);
  background: rgba(15, 95, 115, .16);
  overflow: hidden;
}

.page-products .offline-meter-fill {
  display: block;
  height: 100%;
  width: 100%;
  border-radius: var(--r-pill);
  background: linear-gradient(90deg, var(--lake), var(--amber));
}

/* ---------- 安装方式 ---------- */
.page-products .install-grid {
  display: grid;
  gap: 16px;
  margin-top: clamp(22px, 3.4vw, 32px);
}

.page-products .install-card {
  padding: 24px 22px;
  border-radius: var(--r-lg);
  background: linear-gradient(150deg, var(--paper-hi), var(--lake-soft));
  border: 1px solid var(--rock-line);
}

.page-products .install-card .card-index {
  font-size: var(--fs-xs);
  letter-spacing: .12em;
  color: var(--orange);
}

.page-products .install-card .card-title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: var(--fs-d4);
  color: var(--ink);
  margin: 12px 0 10px;
}

.page-products .install-card .card-body {
  margin: 0;
  color: var(--rock);
  line-height: 1.9;
  font-size: var(--fs-sm);
  max-width: 46ch;
}

/* ---------- 版本记录 ---------- */
.page-products .version-grid {
  margin-top: clamp(22px, 3.4vw, 34px);
  display: grid;
  gap: clamp(22px, 3vw, 36px);
}

.page-products .version-figure {
  margin: 0;
  align-self: start;
}

.page-products .v-timeline {
  position: relative;
  min-width: 0;
}

.page-products .v-node {
  position: relative;
  padding: 0 0 16px 26px;
  border-left: var(--prod-hair) solid var(--rock-line);
}

.page-products .v-node:last-of-type {
  border-left-color: transparent;
}

.page-products .v-dot {
  position: absolute;
  left: -7px;
  top: 14px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--paper-hi);
  border: var(--prod-hair) solid var(--lake);
}

.page-products .v-dot-current {
  background: var(--orange);
  border-color: var(--orange);
  box-shadow: 0 0 0 4px var(--orange-tint);
}

.page-products .v-head {
  appearance: none;
  cursor: pointer;
  width: 100%;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  border-radius: var(--r-pill);
  border: 1px solid var(--rock-line);
  background: var(--paper-hi);
  text-align: left;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-products .v-head:hover {
  border-color: var(--lake);
}

.page-products .v-head[aria-expanded="true"] {
  background: var(--lake-soft);
  border-color: var(--lake);
}

.page-products .v-tag {
  flex: 0 0 auto;
  font-size: var(--fs-sm);
  color: var(--lake-deep);
  letter-spacing: .02em;
}

.page-products .v-tag-current {
  color: var(--orange);
}

.page-products .v-name {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: var(--fs-sm);
  color: var(--ink);
}

.page-products .v-body {
  padding: 12px 16px 4px;
}

.page-products .v-body p {
  margin: 0;
  color: var(--rock);
  font-size: var(--fs-sm);
  line-height: 1.85;
  max-width: 46ch;
}

.page-products .v-total {
  margin: 14px 0 0;
  font-size: var(--fs-xs);
  color: var(--lake);
  letter-spacing: .06em;
}

/* ---------- 三处配合 ---------- */
.page-products .section-together {
  background: linear-gradient(180deg, rgba(228, 240, 242, 0) 0%, rgba(228, 240, 242, .6) 40%, rgba(228, 240, 242, 0) 100%);
}

.page-products .together-bar {
  margin-top: clamp(22px, 3.4vw, 34px);
  display: grid;
  gap: 1px;
  background: var(--rock-line);
  border: 1px solid var(--rock-line);
  border-radius: var(--r-xl);
  overflow: hidden;
}

.page-products .together-item {
  padding: 22px 24px 24px;
  background: var(--paper-hi);
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: background var(--dur) var(--ease);
}

.page-products .together-item:hover {
  background: var(--lake-soft);
}

.page-products .together-idx {
  font-size: var(--fs-xs);
  letter-spacing: .14em;
  color: var(--orange);
}

.page-products .together-title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: var(--fs-d4);
  color: var(--ink);
  margin: 0;
}

.page-products .together-item p {
  margin: 0;
  color: var(--rock);
  font-size: var(--fs-sm);
  line-height: 1.85;
}

.page-products .together-link {
  align-self: flex-start;
  margin-top: 4px;
  font-size: var(--fs-sm);
  color: var(--lake);
  text-decoration: none;
  border-bottom: 1px solid rgba(15, 95, 115, .35);
  padding-bottom: 2px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-products .together-link:hover {
  color: var(--orange);
  border-color: var(--orange);
}

.page-products .together-figure {
  margin: clamp(24px, 3.4vw, 34px) 0 0;
}

.page-products .together-cta {
  margin-top: clamp(22px, 3.2vw, 32px);
  padding: 24px clamp(18px, 3vw, 30px);
  border-radius: var(--r-xl);
  background: linear-gradient(120deg, var(--lake-deep), var(--lake));
  color: var(--paper-hi);
  display: grid;
  gap: 16px;
}

.page-products .together-cta-text {
  margin: 0;
  max-width: 60ch;
  line-height: 1.9;
  font-size: var(--fs-sm);
  color: rgba(248, 245, 239, .92);
}

.page-products .together-cta .btn-quiet {
  color: var(--paper-hi);
  border-color: rgba(248, 245, 239, .5);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-products .install-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-products .hero-grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, .78fr);
    align-items: center;
  }

  .page-products .step-grid .col-4 {
    display: flex;
  }

  .page-products .step-card {
    width: 100%;
  }

  .page-products .offline-grid {
    align-items: start;
  }

  .page-products .version-grid {
    grid-template-columns: minmax(0, .62fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-products .version-figure {
    position: sticky;
    top: calc(var(--main-h) + 24px);
  }
}

@media (max-width: 899px) {
  .page-products .version-figure .ratio-3-4 {
    max-height: 420px;
  }

  .page-products .version-figure img {
    object-position: center top;
  }
}

@media (max-width: 560px) {
  .page-products .hero-title {
    max-width: none;
  }

  .page-products .switch-tabs {
    gap: 6px;
  }

  .page-products .switch-tab {
    padding: 8px 14px;
    font-size: var(--fs-xs);
  }

  .page-products .offline-step {
    padding: 16px;
    gap: 12px;
  }

  .page-products .together-item {
    padding: 18px 18px 20px;
  }
}
<<<END>>>