.page-products {
  --prod-line: 1px solid var(--grid-300);
  --prod-pad: clamp(48px, 8vw, 96px);
}

/* 首屏 */
.page-products .prod-hero {
  padding-block: clamp(24px, 5vw, 56px) clamp(40px, 7vw, 80px);
  border-bottom: var(--prod-line);
  background:
    radial-gradient(880px 380px at 82% -10%, rgba(47, 224, 214, 0.09), transparent 68%),
    radial-gradient(620px 320px at 12% 110%, rgba(242, 183, 80, 0.06), transparent 70%);
}

.page-products .breadcrumb {
  margin-bottom: clamp(24px, 4vw, 48px);
  font-size: var(--fs-14);
}

.page-products .prod-hero__grid {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
}

.page-products .prod-hero__lead h1 {
  font-size: var(--fs-64);
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--fog-100);
  margin-top: 14px;
}

.page-products .prod-hero__intro {
  margin-top: 18px;
  max-width: 40ch;
  font-size: var(--fs-17);
  line-height: 1.75;
  color: var(--steel-500);
}

.page-products .prod-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-products .prod-hero__aside {
  border: var(--prod-line);
  border-left: 2px solid var(--gold-400);
  background: var(--ink-700);
  border-radius: var(--radius);
  padding: 20px 22px 12px;
  align-self: start;
}

.page-products .prod-hero__aside-label {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: 0.06em;
  color: var(--gold-400);
}

.page-products .spec {
  margin: 0;
}

.page-products .spec__row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 11px 0;
  border-bottom: var(--prod-line);
}

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

.page-products .spec dt {
  font-size: var(--fs-14);
  color: var(--steel-500);
}

.page-products .spec dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-17);
  color: var(--fog-100);
}

/* 通用章节 */
.page-products .prod-sec {
  padding-block: var(--prod-pad);
  border-bottom: var(--prod-line);
}

.page-products .prod-sec--alt {
  background: var(--ink-800);
}

.page-products .sec-head {
  max-width: 700px;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-products .sec-head__sub {
  margin-top: 14px;
  font-size: var(--fs-17);
  line-height: 1.75;
  color: var(--steel-500);
}

/* 矩阵 */
.page-products .tool-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--grid-300);
  border: var(--prod-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-products .tool-cell {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 168px;
  padding: 20px 20px 22px;
  background: var(--ink-900);
  border-left: 2px solid transparent;
  text-decoration: none;
  color: inherit;
  transition: background 0.25s var(--ease), border-left-color 0.25s var(--ease);
}

.page-products .tool-cell:hover,
.page-products .tool-cell:focus-visible {
  background: var(--ink-700);
  border-left-color: var(--cyan-400);
  outline: none;
}

.page-products .tool-cell:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: -2px;
}

.page-products .tool-cell__num {
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  color: var(--gold-400);
  letter-spacing: 0.08em;
}

.page-products .tool-cell__name {
  font-size: var(--fs-20);
  font-weight: 700;
  color: var(--fog-100);
  line-height: 1.4;
}

.page-products .tool-cell__desc {
  flex: 1;
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--steel-500);
}

.page-products .tool-cell__meta {
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  color: var(--grid-300);
}

.page-products .tool-cell:hover .tool-cell__meta,
.page-products .tool-cell:focus-visible .tool-cell__meta {
  color: var(--cyan-400);
}

/* 展开横条 */
.page-products .tool-details {
  margin-top: 14px;
  border-left: 2px solid var(--cyan-400);
  background: var(--ink-800);
  border-radius: var(--radius);
}

.page-products .tool-detail {
  display: none;
  padding: 18px 20px 20px;
}

.page-products .tool-detail:target {
  display: block;
}

.page-products .tool-details:not(:has(.tool-detail:target)) .tool-detail:first-child {
  display: block;
}

.page-products .tool-detail__title {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: 0.06em;
  color: var(--gold-400);
}

.page-products .tool-detail__body {
  margin: 0 0 14px;
  max-width: 60ch;
  font-size: var(--fs-17);
  line-height: 1.75;
  color: var(--fog-100);
}

.page-products .tool-detail__link {
  font-size: var(--fs-14);
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 1px;
}

.page-products .tool-detail__link:hover {
  color: var(--cyan-600);
}

/* 深读段 */
.page-products .deep {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
}

.page-products .deep__text h2 {
  margin-top: 12px;
}

.page-products .deep__text > p {
  margin-top: 16px;
  font-size: var(--fs-17);
  line-height: 1.75;
  color: var(--fog-100);
  max-width: 42ch;
}

.page-products .deep__text > p.deep__note {
  font-size: var(--fs-14);
  color: var(--steel-500);
  border-left: 2px solid var(--gold-600);
  padding-left: 14px;
  margin-top: 20px;
}

.page-products .deep__list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
  max-width: 44ch;
}

.page-products .deep__list li {
  display: flex;
  gap: 12px;
  align-items: baseline;
  font-size: var(--fs-17);
  line-height: 1.7;
  color: var(--steel-500);
  border-bottom: var(--prod-line);
  padding-bottom: 12px;
}

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

.page-products .deep__list .tag {
  flex: 0 0 auto;
  font-size: var(--fs-14);
}

.page-products .deep__media {
  margin: 0;
}

.page-products .deep__media img {
  width: 100%;
  height: auto;
  display: block;
  max-width: 100%;
}

/* 四步 */
.page-products .steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--grid-300);
  border: var(--prod-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-products .step {
  background: var(--ink-900);
  padding: 22px 20px 24px;
  border-top: 2px solid transparent;
  transition: border-top-color 0.25s var(--ease);
}

.page-products .step:hover {
  border-top-color: var(--cyan-400);
}

.page-products .step__num {
  display: block;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: 0.1em;
  color: var(--gold-400);
}

.page-products .step h3 {
  font-size: var(--fs-17);
  font-weight: 700;
  color: var(--fog-100);
  line-height: 1.5;
}

.page-products .step p {
  margin: 8px 0 0;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--steel-500);
}

.page-products .flow-figure {
  margin: clamp(20px, 3vw, 32px) 0 0;
}

.page-products .flow-figure img {
  width: 100%;
  height: auto;
  display: block;
  max-width: 100%;
}

/* 设备选择 */
.page-products .device-picker {
  margin-top: clamp(24px, 4vw, 40px);
  border-top: var(--prod-line);
  padding-top: 22px;
}

.page-products .device-picker__label {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: 0.06em;
  color: var(--gold-400);
}

.page-products .device {
  border: var(--prod-line);
  border-radius: var(--radius);
  background: var(--ink-800);
  margin-bottom: 8px;
}

.page-products .device summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 13px 16px;
  font-size: var(--fs-17);
  color: var(--fog-100);
  cursor: pointer;
  list-style: none;
}

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

.page-products .device summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: var(--fs-17);
  color: var(--cyan-400);
}

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

.page-products .device[open] summary {
  color: var(--cyan-400);
}

.page-products .device p {
  margin: 0;
  padding: 0 16px 16px;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--steel-500);
  max-width: 64ch;
}

/* 标尺 */
.page-products .ruler {
  margin-top: clamp(28px, 5vw, 56px);
  border: var(--prod-line);
  border-radius: var(--radius);
  background: var(--ink-900);
  padding: 22px 18px 18px;
}

.page-products .ruler__head {
  margin: 0 0 22px;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: 0.05em;
  color: var(--steel-500);
}

.page-products .ruler__scale {
  position: relative;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.page-products .ruler__scale::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 26px;
  height: 1px;
  background: var(--grid-300);
}

.page-products .ruler__tick {
  position: relative;
  flex: 1 1 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  text-align: center;
}

.page-products .ruler__val {
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  color: var(--steel-500);
}

.page-products .ruler__mark {
  display: block;
  width: 1px;
  height: 12px;
  background: var(--grid-300);
}

.page-products .ruler__cap {
  font-size: var(--fs-14);
  color: var(--steel-500);
  white-space: nowrap;
}

.page-products .ruler__tick--wide .ruler__val,
.page-products .ruler__tick--wide .ruler__cap {
  color: var(--gold-400);
}

.page-products .ruler__tick--wide .ruler__mark {
  background: var(--gold-400);
  height: 18px;
}

/* 自查清单 */
.page-products .checklist {
  display: grid;
  gap: 1px;
  background: var(--grid-300);
  border: var(--prod-line);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 24px 0 24px;
  max-width: 560px;
}

.page-products .check {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px 16px;
  background: var(--ink-800);
  cursor: pointer;
}

.page-products .prod-sec .check {
  background: var(--ink-800);
}

.page-products .check__box {
  appearance: none;
  -webkit-appearance: none;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin: 2px 0 0;
  border: 1px solid var(--grid-300);
  border-radius: var(--radius);
  background: transparent;
  position: relative;
  cursor: pointer;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-products .check__box:checked {
  border-color: var(--ok-500);
  background: rgba(71, 201, 126, 0.16);
}

.page-products .check__box:checked::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 0;
  width: 5px;
  height: 11px;
  border-right: 2px solid var(--ok-500);
  border-bottom: 2px solid var(--ok-500);
  transform: rotate(40deg);
}

.page-products .check__box:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 2px;
}

.page-products .check__label {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: 0.03em;
  color: var(--fog-100);
}

.page-products .check__hint {
  display: block;
  margin-top: 5px;
  font-size: var(--fs-14);
  line-height: 1.65;
  color: var(--steel-500);
}

.page-products .checklist__tip {
  margin: 0;
  padding: 14px 16px;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--steel-500);
  background: var(--ink-700);
  transition: color 0.25s var(--ease), background 0.25s var(--ease);
}

.page-products .checklist:has(#ck1:checked):has(#ck2:checked):has(#ck3:checked) .checklist__tip {
  color: var(--ok-500);
  background: rgba(71, 201, 126, 0.1);
}

/* 场景 */
.page-products .scenes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--grid-300);
  border: var(--prod-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-products .scene {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  background: var(--ink-900);
  transition: background 0.25s var(--ease);
}

.page-products .scene:hover {
  background: var(--ink-700);
}

.page-products .scene__q {
  flex: 1 1 240px;
  margin: 0;
  font-size: var(--fs-17);
  line-height: 1.6;
  color: var(--fog-100);
}

.page-products .scene__a {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: var(--fs-17);
  color: var(--steel-500);
}

.page-products .scene__a a {
  font-size: var(--fs-14);
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.page-products .scene__a a:hover {
  color: var(--cyan-600);
}

/* 结尾 */
.page-products .prod-outro {
  padding-block: clamp(40px, 7vw, 76px);
  background: var(--ink-800);
  border-top: 2px solid var(--cyan-400);
}

.page-products .prod-outro__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  align-items: center;
  justify-content: space-between;
}

.page-products .prod-outro__text {
  margin: 0;
  max-width: 46ch;
  font-size: var(--fs-20);
  line-height: 1.7;
  color: var(--fog-100);
}

.page-products .prod-outro__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* 断点 */
@media (min-width: 640px) {
  .page-products .tool-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (min-width: 900px) {
  .page-products .prod-hero__grid {
    grid-template-columns: 1.4fr 0.85fr;
    align-items: start;
  }

  .page-products .deep {
    grid-template-columns: 1.1fr 0.9fr;
  }

  .page-products .deep--rev .deep__text {
    order: 2;
  }

  .page-products .deep--rev .deep__media {
    order: 1;
  }

  .page-products .ruler {
    padding: 26px 32px 22px;
  }
}

@media (min-width: 960px) {
  .page-products .tool-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1100px) {
  .page-products .steps {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (max-width: 559px) {
  .page-products .ruler__cap {
    display: none;
  }

  .page-products .ruler__scale::before {
    top: 18px;
  }

  .page-products .prod-hero__aside {
    padding: 18px 18px 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .tool-cell,
  .page-products .step,
  .page-products .scene,
  .page-products .check__box,
  .page-products .checklist__tip {
    transition: none;
  }
}
<<<END>>>