.page-products {
  --p-line: #D5E0E9;
  --p-hover: #E3F3F0;
  --p-soft: #F7FAFC;
  background: var(--mist);
  color: var(--text);
}

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

.page-products .prod-head {
  padding: 16px 0 34px;
  border-bottom: 1px solid var(--p-line);
}

.page-products .prod-head h1 {
  margin: 12px 0 20px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 7.2vw, 52px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  max-width: 22ch;
}

.page-products .prod-head__grid {
  display: grid;
  gap: 24px;
}

.page-products .prod-head__lead {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  max-width: 52ch;
}

.page-products .prod-head__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-products .prod-head__facts li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--p-line);
  font-size: 14px;
  color: var(--muted);
}

.page-products .prod-head__facts .mono {
  color: var(--ink);
  font-size: 13px;
  white-space: nowrap;
}

/* 目录轨道 + 正文 */
.page-products .shell {
  padding-top: 28px;
  padding-bottom: 56px;
}

.page-products .rail {
  border-top: 1px solid var(--p-line);
  padding-top: 14px;
}

.page-products .rail__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-products .rail__list {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px 8px;
}

.page-products .rail__link {
  display: block;
  padding: 8px 10px;
  border-left: 3px solid transparent;
  border-radius: var(--radius-s);
  font-size: 14px;
  color: var(--text);
  text-decoration: none;
  transition: background-color 180ms var(--ease), color 180ms var(--ease);
}

.page-products .rail__link:hover,
.page-products .rail__link:focus-visible {
  background: var(--paper);
}

.page-products .rail__link.is-active {
  background: var(--paper);
  border-left-color: var(--orange);
  color: var(--ink);
  font-weight: 700;
}

.page-products .rail__cta {
  display: inline-block;
}

.page-products .shell__main {
  min-width: 0;
  padding-top: 26px;
}

/* 分区通用 */
.page-products .prod-sec {
  padding: 30px 0 12px;
  border-top: 1px solid var(--p-line);
  scroll-margin-top: calc(var(--header-offset) + 16px);
}

.page-products .prod-sec:first-child {
  border-top: none;
  padding-top: 0;
}

.page-products .prod-sec__head {
  display: grid;
  gap: 10px;
  margin-bottom: 20px;
}

.page-products .prod-sec__no {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--teal-deep);
}

.page-products .prod-sec h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 4.8vw, 31px);
  line-height: 1.28;
  letter-spacing: -0.01em;
}

.page-products .prod-sec__intro,
.page-products .prod-sec__text {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  max-width: 64ch;
}

.page-products .prod-sec__tail {
  margin: 16px 0 0;
  font-size: 14px;
  color: var(--muted);
}

.page-products .prod-sec__links {
  display: grid;
  gap: 10px;
  margin-top: 16px;
  font-size: 14px;
}

.page-products .prod-sec__links .link-arrow,
.page-products .prod-sec__tail .link-arrow {
  font-size: 14px;
}

.page-products .prod-note {
  margin: 16px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--teal-soft);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 66ch;
}

/* 图片容器 */
.page-products .img-frame {
  margin: 0 0 22px;
  background: var(--ink-2);
  border-radius: var(--radius-m);
  overflow: hidden;
}

.page-products .img-frame img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-products .img-frame__caption {
  padding: 10px 14px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--on-dark);
  background: var(--ink-2);
}

/* 浏览器窗口 + 对照表 */
.page-products .browser-frame {
  background: var(--paper);
  border: 1px solid var(--p-line);
  border-radius: var(--radius-m);
  overflow: hidden;
  box-shadow: 0 18px 40px rgba(14, 27, 42, 0.08);
}

.page-products .browser-frame__bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 10px 14px;
  background: var(--ink-2);
}

.page-products .browser-frame__dot {
  display: block;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--orange);
}

.page-products .browser-frame__dot:nth-child(2) {
  background: var(--amber);
}

.page-products .browser-frame__dot:nth-child(3) {
  background: var(--teal);
}

.page-products .browser-frame__label {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--on-dark);
}

.page-products .prod-table-wrap {
  overflow-x: auto;
}

.page-products .prod-table {
  width: 100%;
  min-width: 480px;
  border-collapse: collapse;
  font-size: 13.5px;
}

.page-products .prod-table caption {
  padding: 14px 16px 8px;
  text-align: left;
  font-size: 12.5px;
  color: var(--muted);
}

.page-products .prod-table th {
  text-align: left;
  padding: 10px 16px;
  background: var(--p-soft);
  border-bottom: 1px solid var(--p-line);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--muted);
  white-space: nowrap;
}

.page-products .prod-table td {
  padding: 13px 16px;
  border-bottom: 1px solid var(--p-line);
  line-height: 1.65;
  vertical-align: top;
}

.page-products .prod-table tbody tr {
  transition: background-color 160ms var(--ease);
}

.page-products .prod-table tbody tr:hover {
  background: var(--p-hover);
}

.page-products .prod-table tbody tr:last-child td,
.page-products .prod-table tbody tr:last-child th {
  border-bottom: none;
}

.page-products .prod-table__name {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  color: var(--ink);
  font-size: 14px;
}

.page-products .dot-teal {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--teal);
  flex: none;
}

.page-products .ver {
  display: inline-block;
  padding: 2px 7px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--ink);
  background: var(--mist);
  border: 1px solid var(--p-line);
  border-radius: 4px;
  white-space: nowrap;
}

/* 九个标签 */
.page-products .dir-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  border-top: 1px solid var(--p-line);
}

.page-products .dir-list__row {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 6px 10px;
  padding: 14px 4px;
  border-bottom: 1px solid var(--p-line);
}

.page-products .dir-list__no {
  grid-row: span 2;
  font-size: 12px;
  color: var(--muted-soft);
  padding-top: 5px;
}

.page-products .dir-list__row .tag {
  justify-self: start;
  font-size: 12.5px;
}

.page-products .dir-list__row p {
  grid-column: 2;
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* 专栏 */
.page-products .column-split {
  display: grid;
  gap: 22px;
}

.page-products .series {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-products .series__item {
  display: grid;
  gap: 2px;
  padding: 12px 14px;
  background: var(--paper);
  border-radius: var(--radius-s);
  border-left: 3px solid var(--teal);
}

.page-products .series__item:nth-child(even) {
  border-left-color: var(--amber);
}

.page-products .series__name {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--ink);
}

.page-products .series__note {
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

/* 帮助 */
.page-products .help-split {
  display: grid;
  gap: 18px;
  margin-bottom: 22px;
}

.page-products .help-map {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.page-products .help-map li {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 11px 12px;
  background: var(--paper);
  border: 1px solid var(--p-line);
  border-radius: var(--radius-s);
  font-size: 13.5px;
}

.page-products .help-map li::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--teal);
  flex: none;
}

.page-products .help-map li:nth-child(3n)::before {
  background: var(--orange);
}

.page-products .help-split__text p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.85;
}

.page-products .help-split__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* 三步检查 */
.page-products .steps {
  display: grid;
  gap: 12px;
  margin-top: 6px;
}

.page-products .step {
  position: relative;
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 10px;
  padding: 16px 16px 14px;
  background: var(--paper);
  border: 1px solid var(--p-line);
  border-radius: var(--radius-m);
  cursor: pointer;
}

.page-products .step__check {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 18px;
  height: 18px;
  accent-color: var(--teal);
  cursor: pointer;
}

.page-products .step__no {
  font-size: 12px;
  color: var(--muted-soft);
  padding-top: 3px;
}

.page-products .step__body {
  display: grid;
  gap: 5px;
  padding-right: 26px;
}

.page-products .step__body strong {
  font-size: 15.5px;
  color: var(--ink);
}

.page-products .step__text {
  font-size: 14px;
  line-height: 1.75;
  color: var(--text);
}

.page-products .step__q {
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
  border-top: 1px dashed var(--p-line);
  padding-top: 6px;
}

.page-products .step__check:checked ~ .step__body strong {
  color: var(--teal-deep);
}

.page-products .step__check:checked ~ .step__body {
  opacity: 0.72;
}

/* 场景带 */
.page-products .scenes {
  display: grid;
  gap: 10px;
}

.page-products .scene {
  padding: 16px 18px;
  background: var(--paper);
  border-radius: var(--radius-s);
  border-left: 4px solid var(--teal);
}

.page-products .scene:nth-child(even) {
  border-left-color: var(--orange);
}

.page-products .scene h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 800;
  color: var(--ink);
}

.page-products .scene p {
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-products .scene .link-arrow {
  font-size: 13.5px;
}

/* 维护节奏 */
.page-products .quarter {
  list-style: none;
  margin: 4px 0 20px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  position: relative;
}

.page-products .quarter::before {
  content: "";
  position: absolute;
  left: 12%;
  right: 12%;
  top: 8px;
  height: 2px;
  background: var(--teal-soft);
}

.page-products .quarter__item {
  position: relative;
  padding-top: 26px;
  text-align: center;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--muted);
}

.page-products .quarter__item::before {
  content: "";
  position: absolute;
  top: 1px;
  left: 50%;
  width: 14px;
  height: 14px;
  margin-left: -7px;
  border-radius: 50%;
  background: var(--paper);
  border: 3px solid var(--teal);
}

.page-products .quarter__item:first-child::before {
  border-color: var(--orange);
}

.page-products .quarter__item .mono {
  display: block;
  font-size: 11px;
  color: var(--teal-deep);
  margin-bottom: 2px;
}

.page-products .panel {
  margin-top: 22px;
  padding: 22px;
  border-radius: var(--radius-m);
  display: grid;
  gap: 12px;
}

.page-products .panel h3 {
  margin: 0;
  font-size: 19px;
  font-weight: 800;
  color: var(--paper);
}

.page-products .panel p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--on-dark);
  max-width: 60ch;
}

.page-products .panel__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* 桌面端 */
@media (min-width: 760px) {
  .page-products .prod-head__grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.85fr);
    gap: 40px;
    align-items: start;
  }

  .page-products .prod-head__lead {
    font-size: 17px;
  }

  .page-products .dir-list__row {
    grid-template-columns: 44px 132px minmax(0, 1fr);
    gap: 4px 14px;
    align-items: start;
    padding: 15px 6px;
  }

  .page-products .dir-list__no {
    grid-row: span 1;
    padding-top: 6px;
  }

  .page-products .dir-list__row p {
    grid-column: 3;
  }

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

  .page-products .help-split {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    gap: 28px;
    align-items: start;
  }

  .page-products .steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    position: relative;
    padding-top: 16px;
  }

  .page-products .steps::before {
    content: "";
    position: absolute;
    top: 4px;
    left: 8%;
    right: 8%;
    height: 2px;
    background: repeating-linear-gradient(90deg, var(--line) 0 10px, transparent 10px 20px);
    opacity: 0.4;
  }

  .page-products .scenes {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-products .scene:nth-child(1) {
    grid-column: span 6;
  }

  .page-products .scene:nth-child(2) {
    grid-column: span 4;
  }

  .page-products .scene:nth-child(3) {
    grid-column: span 2;
  }

  .page-products .scene:nth-child(4) {
    grid-column: span 6;
  }
}

@media (min-width: 1000px) {
  .page-products .shell {
    display: grid;
    grid-template-columns: var(--rail-w) minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }

  .page-products .rail {
    position: sticky;
    top: calc(var(--header-offset) + 16px);
    border-top: none;
    border-right: 1px solid var(--p-line);
    padding: 4px 18px 0 0;
  }

  .page-products .rail__list {
    grid-template-columns: minmax(0, 1fr);
    gap: 2px;
  }

  .page-products .shell__main {
    padding-top: 4px;
  }

  .page-products .column-split {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 32px;
    align-items: start;
  }

  .page-products .img-frame {
    margin-bottom: 24px;
  }

  .page-products .prod-sec {
    padding: 38px 0 16px;
  }

  .page-products .prod-sec__links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .rail__link,
  .page-products .prod-table tbody tr {
    transition: none;
  }
}