.page-products {
  --product-cut: 16px;
  --product-panel: rgba(11, 59, 94, .78);
  --product-line: rgba(169, 183, 198, .2);
  background: var(--c-paper);
  color: var(--c-abyss);
}

.page-products * {
  box-sizing: border-box;
}

.page-products .version-hero {
  position: relative;
  overflow: hidden;
  padding: 1.25rem 0 clamp(2.8rem, 7vw, 5rem);
  background:
    radial-gradient(circle at 82% 18%, rgba(22, 217, 227, .14), transparent 34%),
    linear-gradient(140deg, var(--c-navy) 0%, var(--c-abyss) 74%);
  color: var(--c-paper);
}

.page-products .version-hero::before {
  content: "";
  position: absolute;
  top: -10%;
  right: -8%;
  width: 56%;
  height: 120%;
  background: linear-gradient(120deg, rgba(22, 217, 227, .1), rgba(255, 107, 74, .06));
  transform: skewX(-14deg);
  pointer-events: none;
}

.page-products .version-hero .breadcrumb {
  position: relative;
  z-index: 1;
  margin-bottom: clamp(1rem, 3vw, 1.8rem);
}

.page-products .breadcrumb-link {
  color: var(--c-mist);
}

.page-products .breadcrumb-current {
  color: var(--c-sand);
}

.page-products .hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.8rem);
  align-items: start;
}

.page-products .hero-grid > * {
  min-width: 0;
}

.page-products .hero-copy .eyebrow {
  color: var(--c-cyan);
}

.page-products .hero-copy h1 {
  max-width: 17ch;
  margin: 0.45rem 0 1rem;
  font-family: var(--font-head);
  font-size: clamp(2rem, 7vw, 3.5rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.02em;
}

.page-products .hero-lead {
  max-width: 42rem;
  margin: 0;
  color: var(--c-mist);
  font-size: clamp(0.95rem, 2.4vw, 1.05rem);
  line-height: 1.85;
}

.page-products .hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.35rem 0 1.5rem;
}

.page-products .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-products .compare-stage {
  position: relative;
  padding: clamp(1rem, 3vw, 1.5rem);
  border: 1px solid var(--edge);
  background:
    linear-gradient(160deg, rgba(18, 74, 114, .9), rgba(11, 59, 94, .92));
  box-shadow: var(--shadow-panel);
  clip-path: polygon(0 0, calc(100% - var(--product-cut)) 0, 100% var(--product-cut), 100% 100%, 0 100%);
}

.page-products .stage-head {
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line);
}

.page-products .stage-head p {
  margin: 0;
  color: var(--c-mist);
  font-size: 0.86rem;
  line-height: 1.7;
}

.page-products .stage-kicker {
  margin-bottom: 0.4rem !important;
  color: var(--c-sand) !important;
  font-size: 0.68rem !important;
  letter-spacing: 0.08em;
}

.page-products .compare-cols {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.9rem;
  padding: 1rem 0;
}

.page-products .compare-col {
  min-width: 0;
  padding: 0.9rem;
  border: 1px solid var(--line-soft);
  background: rgba(4, 18, 31, .22);
}

.page-products .compare-col--new {
  border-color: rgba(22, 217, 227, .28);
  background: rgba(4, 18, 31, .36);
}

.page-products .version-name {
  margin: 0 0 0.8rem;
  color: var(--c-paper);
  font-family: var(--font-head);
  font-size: 1.05rem;
  font-weight: 700;
}

.page-products .compare-col--old .version-name {
  color: var(--c-sand);
}

.page-products .compare-col--new .version-name {
  color: var(--c-cyan);
}

.page-products .version-facts {
  margin: 0;
}

.page-products .version-facts div {
  margin-bottom: 0.7rem;
}

.page-products .version-facts div:last-child {
  margin-bottom: 0;
}

.page-products .version-facts dt {
  margin-bottom: 0.15rem;
  color: var(--c-cyan);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.08em;
}

.page-products .version-facts dd {
  margin: 0;
  color: var(--c-mist);
  font-size: 0.84rem;
  line-height: 1.6;
}

.page-products .compare-axis {
  height: 12px;
  border-top: 1px solid var(--edge);
  background: repeating-linear-gradient(90deg, transparent 0 14px, var(--c-cyan) 14px 15px);
  opacity: 0.8;
}

.page-products .stage-note {
  margin: 0;
  padding-top: 0.9rem;
  border-top: 1px solid var(--line);
  color: var(--c-sand);
  font-size: 0.8rem;
  line-height: 1.7;
}

.page-products .overview-figure {
  position: relative;
  z-index: 1;
  margin: clamp(1.8rem, 5vw, 3rem) 0 0;
  border: 1px solid var(--edge);
  background: rgba(11, 59, 94, .5);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-products .overview-figure img,
.page-products .matrix-figure img,
.page-products .signal-figure img,
.page-products .save-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-products .overview-figure figcaption,
.page-products .matrix-figure figcaption,
.page-products .signal-figure figcaption,
.page-products .save-figure figcaption {
  padding: 0.7rem 0.9rem;
  color: var(--c-mist);
  font-size: 0.76rem;
  line-height: 1.6;
}

.page-products .diff-section,
.page-products .choice-section {
  padding-block: clamp(2.6rem, 6vw, 5rem);
  background: var(--c-paper);
}

.page-products .diff-section {
  border-top: 6px solid var(--c-cyan);
}

.page-products .device-section,
.page-products .save-section {
  padding-block: clamp(2.6rem, 6vw, 5rem);
  background: var(--c-navy);
  color: var(--c-paper);
}

.page-products .device-section {
  background:
    linear-gradient(180deg, rgba(11, 59, 94, .55), transparent 38%),
    var(--c-navy);
}

.page-products .save-section {
  background:
    linear-gradient(135deg, var(--c-navy-2), var(--c-abyss));
}

.page-products .section-head {
  margin-bottom: clamp(1.5rem, 4vw, 2.5rem);
}

.page-products .section-head p:not(.eyebrow) {
  max-width: 52rem;
  margin: 0.6rem 0 0;
  color: var(--c-navy-2);
  line-height: 1.8;
}

.page-products .device-section .section-head p:not(.eyebrow),
.page-products .save-section .section-head p:not(.eyebrow) {
  color: var(--c-mist);
}

.page-products .device-section .eyebrow,
.page-products .save-section .eyebrow {
  color: var(--c-cyan);
}

.page-products .diff-groups {
  display: grid;
  gap: 0.9rem;
}

.page-products .diff-group {
  border: 1px solid rgba(7, 42, 69, .14);
  border-left: 4px solid var(--c-cyan);
  background: #fff;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
}

.page-products .diff-group > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
  padding: 0.95rem 1rem;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-head);
  font-size: 0.95rem;
  transition: background 180ms var(--ease);
}

.page-products .diff-group > summary::-webkit-details-marker {
  display: none;
}

.page-products .diff-group > summary::after {
  content: "+";
  flex: 0 0 auto;
  color: var(--c-coral);
  font-family: var(--font-mono);
  font-size: 1.4rem;
  line-height: 1;
}

.page-products .diff-group[open] > summary {
  background: rgba(22, 217, 227, .07);
}

.page-products .diff-group[open] > summary::after {
  content: "−";
}

.page-products .diff-summary-title {
  display: inline-flex;
  align-items: baseline;
  gap: 0.55rem;
  min-width: 0;
}

.page-products .diff-summary-title .mono {
  color: var(--c-navy-2);
  font-size: 0.7rem;
}

.page-products .diff-summary-meta {
  flex: 0 0 auto;
  color: #5a7083;
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 400;
}

.page-products .diff-body {
  padding: 0 1rem 1rem;
}

.page-products .diff-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.35rem;
  padding: 0.8rem 0;
  border-top: 1px solid rgba(7, 42, 69, .1);
}

.page-products .diff-item {
  color: var(--c-navy);
  font-size: 0.86rem;
  font-weight: 700;
}

.page-products .diff-old,
.page-products .diff-new {
  color: #43596d;
  font-size: 0.84rem;
  line-height: 1.65;
}

.page-products .diff-old::before,
.page-products .diff-new::before {
  display: inline-block;
  margin-right: 0.35rem;
  padding: 0.05rem 0.28rem;
  border-radius: 1px;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  vertical-align: 0.08em;
}

.page-products .diff-old::before {
  content: "旧版";
  color: #7a5a1f;
  background: rgba(232, 195, 122, .32);
}

.page-products .diff-new::before {
  content: "现行";
  color: #065d58;
  background: rgba(43, 179, 163, .18);
}

.page-products .diff-level {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  padding: 0.12rem 0.38rem;
  font-family: var(--font-mono);
  font-size: 0.64rem;
  font-weight: 600;
}

.page-products .diff-level--high {
  color: #8f2e1a;
  background: rgba(255, 107, 74, .18);
}

.page-products .diff-level--mid {
  color: #80541f;
  background: rgba(242, 166, 90, .24);
}

.page-products .diff-level--low {
  color: #1f665d;
  background: rgba(43, 179, 163, .16);
}

.page-products .signal-figure {
  margin: 0.9rem 0 0;
  border: 1px solid rgba(242, 166, 90, .45);
  background: var(--c-navy);
}

.page-products .signal-figure figcaption {
  color: var(--c-mist);
}

.page-products .matrix-figure {
  margin: 0 0 1.2rem;
  border: 1px solid var(--edge);
  background: var(--c-paper);
}

.page-products .matrix-figure figcaption {
  color: var(--c-navy-2);
}

.page-products .device-matrix {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.9rem;
}

.page-products .device-card {
  min-width: 0;
  padding: 1rem;
  border: 1px solid var(--edge);
  background: var(--product-panel);
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
}

.page-products .device-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.7rem;
  margin-bottom: 0.7rem;
}

.page-products .device-code {
  color: var(--c-sand);
  font-size: 0.72rem;
}

.page-products .device-state {
  font-size: 0.68rem;
}

.page-products .device-card h3 {
  margin: 0 0 0.5rem;
  color: var(--c-paper);
  font-family: var(--font-head);
  font-size: 1.1rem;
}

.page-products .device-card p {
  margin: 0 0 0.8rem;
  color: var(--c-mist);
  font-size: 0.84rem;
  line-height: 1.7;
}

.page-products .device-card ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-products .device-card li {
  position: relative;
  margin-bottom: 0.35rem;
  padding-left: 0.8rem;
  color: var(--c-mist);
  font-size: 0.78rem;
  line-height: 1.6;
}

.page-products .device-card li::before {
  content: "◆";
  position: absolute;
  left: 0;
  top: 0.12em;
  color: var(--c-cyan);
  font-size: 0.48rem;
}

.page-products .choice-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.9rem;
}

.page-products .scene-card {
  position: relative;
  min-width: 0;
  padding: 1.05rem;
  border: 1px solid rgba(7, 42, 69, .14);
  background: #fff;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
}

.page-products .scene-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 38%;
  height: 3px;
  background: linear-gradient(90deg, var(--c-cyan), transparent);
}

.page-products .scene-label {
  margin: 0 0 0.4rem;
  color: var(--c-navy-3);
  font-size: 0.66rem;
  letter-spacing: 0.08em;
}

.page-products .scene-card h3 {
  margin: 0 0 0.5rem;
  color: var(--c-navy);
  font-family: var(--font-head);
  font-size: 1.05rem;
}

.page-products .scene-card p {
  margin: 0;
  color: #43596d;
  font-size: 0.84rem;
  line-height: 1.75;
}

.page-products .text-link {
  display: inline-block;
  margin-top: 0.8rem;
  color: var(--c-navy-3);
  font-size: 0.82rem;
  font-weight: 600;
  text-decoration: underline;
  text-decoration-color: var(--c-cyan);
  text-underline-offset: 0.2em;
}

.page-products .choice-notes {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.9rem;
  margin-top: 1.2rem;
}

.page-products .note-box {
  padding: 1rem;
  border-left: 3px solid var(--c-pine);
  background: rgba(43, 179, 163, .07);
}

.page-products .note-box--warn {
  border-left-color: var(--c-amber);
  background: rgba(242, 166, 90, .1);
}

.page-products .note-box h3 {
  margin: 0 0 0.55rem;
  color: var(--c-navy);
  font-family: var(--font-head);
  font-size: 0.95rem;
}

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

.page-products .note-list li {
  position: relative;
  margin-bottom: 0.35rem;
  padding-left: 0.85rem;
  color: #43596d;
  font-size: 0.82rem;
  line-height: 1.65;
}

.page-products .note-list li::before {
  content: "·";
  position: absolute;
  left: 0.1rem;
  top: 0;
  color: var(--c-coral);
  font-weight: 700;
}

.page-products .save-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.2rem;
  align-items: start;
}

.page-products .save-layout > * {
  min-width: 0;
}

.page-products .browser-panel {
  padding: 1rem;
  border: 1px solid var(--edge);
  background: rgba(4, 18, 31, .3);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
}

.page-products .browser-panel > h3 {
  margin: 0 0 0.4rem;
  color: var(--c-paper);
  font-family: var(--font-head);
  font-size: 1.15rem;
}

.page-products .browser-panel > p {
  margin: 0 0 1rem;
  color: var(--c-mist);
  font-size: 0.84rem;
  line-height: 1.7;
}

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

.page-products .browser-group > summary {
  padding: 0.75rem 0;
  list-style: none;
  cursor: pointer;
  color: var(--c-sand);
  font-family: var(--font-head);
  font-size: 0.92rem;
  font-weight: 600;
}

.page-products .browser-group > summary::-webkit-details-marker {
  display: none;
}

.page-products .browser-group > summary::after {
  content: "＋";
  float: right;
  color: var(--c-cyan);
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.page-products .browser-group[open] > summary::after {
  content: "−";
}

.page-products .browser-body {
  padding: 0 0 0.8rem;
}

.page-products .browser-body p {
  margin: 0;
  color: var(--c-mist);
  font-size: 0.84rem;
  line-height: 1.75;
}

.page-products .save-visual {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.9rem;
}

.page-products .save-figure {
  margin: 0;
  border: 1px solid var(--edge);
  background: var(--c-paper);
}

.page-products .save-figure figcaption {
  color: var(--c-navy-2);
}

.page-products .save-method-card {
  padding: 1rem;
  border: 1px solid var(--line);
  background: rgba(18, 74, 114, .5);
}

.page-products .save-method-card h3 {
  margin: 0 0 0.45rem;
  color: var(--c-paper);
  font-family: var(--font-head);
  font-size: 1rem;
}

.page-products .save-method-card p:not(.scene-label) {
  margin: 0;
  color: var(--c-mist);
  font-size: 0.84rem;
  line-height: 1.75;
}

.page-products .next-links {
  padding-block: clamp(2rem, 5vw, 3.2rem);
  border-top: 1px solid var(--edge);
  background:
    repeating-linear-gradient(90deg, transparent 0 79px, rgba(22, 217, 227, .05) 79px 80px),
    var(--c-abyss);
  color: var(--c-paper);
}

.page-products .next-links .container {
  display: grid;
  gap: 1rem;
  align-items: center;
}

.page-products .next-links .eyebrow {
  color: var(--c-cyan);
}

.page-products .next-links h2 {
  max-width: 34rem;
  margin: 0.3rem 0 0;
  color: var(--c-paper);
  font-family: var(--font-head);
  font-size: clamp(1.25rem, 4vw, 1.8rem);
  line-height: 1.25;
}

.page-products .next-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.page-products .closing-note {
  margin: 0;
  color: var(--c-mist);
  font-size: 0.8rem;
  line-height: 1.7;
}

.page-products .closing-note a {
  color: var(--c-sand);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

@media (min-width: 640px) {
  .page-products .device-matrix,
  .page-products .choice-grid,
  .page-products .choice-notes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-products .save-method-card {
    grid-column: 1 / -1;
  }

  .page-products .diff-row {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.5fr) minmax(0, 1.5fr) auto;
    gap: 0.7rem;
    align-items: start;
  }

  .page-products .diff-level {
    justify-self: end;
  }
}

@media (min-width: 1024px) {
  .page-products .version-hero {
    padding-top: 1.5rem;
  }

  .page-products .hero-grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    align-items: center;
  }

  .page-products .compare-cols {
    grid-template-columns: minmax(0, 1fr) 18px minmax(0, 1fr);
    align-items: stretch;
    gap: 0.8rem;
  }

  .page-products .compare-axis {
    width: 18px;
    height: auto;
    border-top: 0;
    border-left: 1px solid var(--edge);
    background: repeating-linear-gradient(180deg, transparent 0 16px, var(--c-cyan) 16px 17px);
  }

  .page-products .device-matrix {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-products .save-layout {
    grid-template-columns: minmax(0, 1.03fr) minmax(0, 0.97fr);
    gap: 1.5rem;
  }

  .page-products .next-links .container {
    grid-template-columns: minmax(0, 1.3fr) auto;
  }

  .page-products .closing-note {
    grid-column: 1 / -1;
  }
}
<<<END>>>