.page-products {
  --prod-flow-gap: 26px;
  --prod-sec-pad: 40px;
  background: var(--ink);
  color: var(--body-text);
}

/* ===== 首屏 ===== */
.page-products .prod-head {
  background:
    radial-gradient(120% 80% at 88% -10%, rgba(201, 162, 39, .16), transparent 62%),
    linear-gradient(180deg, var(--ink-deep) 0%, var(--ink) 100%);
  padding: 26px 0 44px;
  border-bottom: 1px solid var(--line);
}

.page-products .prod-head-inner {
  margin-top: 22px;
  max-width: 40em;
}

.page-products .prod-head-inner .eyebrow {
  margin: 0 0 14px;
}

.page-products .prod-head h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(30px, 7vw, 60px);
  line-height: 1.18;
  letter-spacing: -.01em;
  color: var(--paper);
  margin: 0 0 20px;
}

.page-products .prod-lead {
  font-size: 17px;
  line-height: 1.85;
  color: var(--body-text);
  max-width: var(--measure);
  margin: 0 0 26px;
}

.page-products .prod-quick {
  list-style: none;
  margin: 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 10px;
}

.page-products .prod-quick li {
  font-size: 14px;
  line-height: 1.6;
  color: var(--slate);
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
}

.page-products .prod-quick .mono {
  color: var(--gold-hi);
  font-size: 15px;
  letter-spacing: .02em;
}

/* ===== 主体栅格 ===== */
.page-products .prod-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
  padding: 38px 0 84px;
}

/* ===== 侧栏信息卡 ===== */
.page-products .prod-rail-card {
  background: linear-gradient(160deg, var(--ink-lift), var(--ink-deep));
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  padding: 24px 22px 22px;
  box-shadow: var(--shadow);
}

.page-products .prod-rail-card .eyebrow {
  margin: 0 0 10px;
}

.page-products .prod-ver {
  font-size: 44px;
  line-height: 1;
  letter-spacing: .04em;
  color: var(--gold-hi);
  margin: 0 0 20px;
}

.page-products .prod-rail-list {
  margin: 0 0 22px;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-products .prod-rail-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 11px 0;
  border-bottom: 1px solid rgba(93, 122, 138, .22);
}

.page-products .prod-rail-row dt {
  font-size: 14px;
  color: var(--slate);
  line-height: 1.5;
}

.page-products .prod-rail-row dd {
  margin: 0;
  font-size: 14px;
  color: var(--paper);
  text-align: right;
  white-space: nowrap;
}

.page-products .prod-rail-cta {
  display: block;
  width: 100%;
  text-align: center;
}

.page-products .prod-rail-note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
}

/* ===== 章节通用 ===== */
.page-products .prod-sec {
  padding: var(--prod-sec-pad) 0 44px;
  border-top: 1px solid var(--line-cool);
}

.page-products .prod-sec:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-products .prod-sec-num {
  display: block;
  font-size: 13px;
  letter-spacing: .22em;
  color: var(--gold);
  margin: 0 0 12px;
}

.page-products .prod-sec h2 {
  font-family: var(--font-display);
  font-size: clamp(22px, 4.6vw, 32px);
  line-height: 1.32;
  color: var(--paper);
  margin: 0 0 18px;
  letter-spacing: -.005em;
}

.page-products .prod-sec h3 {
  font-family: var(--font-display);
  font-size: 19px;
  line-height: 1.4;
  color: var(--paper);
  margin: 0 0 10px;
}

.page-products .prod-sec .prose {
  font-size: 16px;
  line-height: 1.85;
  color: var(--body-text);
  max-width: var(--measure);
  margin: 0 0 20px;
}

.page-products .prod-sec .prose a {
  color: var(--gold-hi);
  text-decoration: none;
  border-bottom: 1px solid rgba(232, 199, 102, .45);
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.page-products .prod-sec .prose a:hover,
.page-products .prod-sec .prose a:focus-visible {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

/* ===== 包体对比条 ===== */
.page-products .prod-sizes {
  display: grid;
  gap: 20px;
  margin: 0 0 30px;
  padding: 24px 22px;
  background: var(--ink-lift);
  border: 1px solid var(--line);
  border-radius: var(--r-card);
}

.page-products .prod-size-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  font-size: 14px;
  color: var(--body-text);
  margin-bottom: 9px;
}

.page-products .prod-size-head .mono {
  color: var(--gold-hi);
  font-size: 14px;
  white-space: nowrap;
}

.page-products .prod-size-track {
  display: block;
  height: 12px;
  border-radius: 999px;
  background: rgba(93, 122, 138, .22);
  overflow: hidden;
}

.page-products .prod-size-fill {
  display: block;
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--gold-hi), var(--gold));
  transform-origin: left center;
}

.page-products .prod-size-fill--deep {
  background: linear-gradient(90deg, var(--gold), #8a6d16);
}

.page-products .prod-size-fill--cool {
  background: linear-gradient(90deg, #8fa3b0, var(--slate));
}

/* ===== 图片 ===== */
.page-products .prod-figure {
  margin: 0 0 12px;
}

.page-products .prod-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--r-card);
  border: 1px solid var(--line);
  background: linear-gradient(150deg, var(--ink-lift), var(--ink-deep));
  object-fit: cover;
}

.page-products .prod-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
}

.page-products .prod-figure--tall img {
  aspect-ratio: 3 / 4;
}

/* ===== 两条安装路径 ===== */
.page-products .prod-paths {
  display: grid;
  gap: 20px;
  margin: 26px 0 22px;
}

.page-products .prod-path {
  background: var(--ink-lift);
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  padding: 22px 20px;
}

.page-products .prod-path-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  padding-bottom: 16px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.page-products .prod-path-os {
  font-family: var(--font-display);
  font-size: 17px;
  color: var(--paper);
}

.page-products .prod-path-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-products .prod-path-steps li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 14px;
  position: relative;
}

.page-products .prod-path-steps li:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 14px;
  top: 32px;
  bottom: -18px;
  width: 1px;
  background: linear-gradient(180deg, rgba(201, 162, 39, .45), rgba(201, 162, 39, .06));
}

.page-products .prod-path-idx {
  font-size: 13px;
  color: var(--gold);
  letter-spacing: .08em;
  padding-top: 2px;
}

.page-products .prod-path-steps h3 {
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 600;
  color: var(--paper);
  margin: 0 0 7px;
}

.page-products .prod-path-steps p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--body-text);
  margin: 0;
}

/* ===== 配置表 ===== */
.page-products .prod-spec-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  margin: 0 0 22px;
}

.page-products .prod-spec-table-wrap {
  background: var(--paper);
  border-radius: var(--r-card);
  border: 1px solid var(--paper-line);
  overflow-x: auto;
}

.page-products .prod-spec-table {
  width: 100%;
  min-width: 460px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-products .prod-spec-table caption {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.page-products .prod-spec-table th,
.page-products .prod-spec-table td {
  text-align: left;
  padding: 13px 14px;
  line-height: 1.6;
  border-bottom: 1px solid var(--paper-line);
  color: var(--ink);
  vertical-align: top;
}

.page-products .prod-spec-table thead th {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: .06em;
  text-transform: none;
  color: var(--ink);
  background: rgba(201, 162, 39, .16);
  border-bottom: 1px solid rgba(201, 162, 39, .45);
}

.page-products .prod-spec-table tbody th {
  font-weight: 600;
  color: var(--ink);
  white-space: nowrap;
  width: 22%;
}

.page-products .prod-spec-table tbody tr:last-child th,
.page-products .prod-spec-table tbody tr:last-child td {
  border-bottom: 0;
}

/* ===== 更新方式卡片 ===== */
.page-products .grid {
  margin: 26px 0 22px;
}

.page-products .prod-card {
  border-radius: var(--r-card);
  padding: 22px 20px;
  border: 1px solid var(--line);
}

.page-products .prod-card h3 {
  font-family: var(--font-display);
  font-size: 19px;
  margin: 0 0 10px;
  line-height: 1.4;
}

.page-products .prod-card p {
  font-size: 15px;
  line-height: 1.8;
  margin: 0;
}

.page-products .prod-card--ink {
  background: var(--ink-lift);
  color: var(--body-text);
}

.page-products .prod-card--ink h3 {
  color: var(--gold-hi);
}

.page-products .prod-card--paper {
  background: var(--paper);
  border-color: var(--paper-line);
}

.page-products .prod-card--paper h3 {
  color: var(--ink);
}

.page-products .prod-card--paper p {
  color: #2b3138;
}

.page-products .prod-card--paper .mono {
  color: #7a5f10;
}

.page-products .prod-card--ink .mono {
  color: var(--gold-hi);
}

/* ===== 提示条 ===== */
.page-products .prod-notice {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 18px 20px;
  margin: 0 0 22px;
  border: 1px solid rgba(180, 85, 45, .45);
  border-left: 3px solid var(--ochre);
  border-radius: 6px var(--r-card) var(--r-card) var(--r-card);
  background: rgba(180, 85, 45, .08);
}

.page-products .prod-notice p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--body-text);
}

/* ===== 四步折叠 ===== */
.page-products .prod-steps {
  display: grid;
  gap: 14px;
  margin: 26px 0 8px;
}

.page-products .prod-step {
  background: var(--ink-lift);
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  overflow: hidden;
}

.page-products .prod-step > summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
  transition: background .2s var(--ease);
}

.page-products .prod-step > summary::-webkit-details-marker {
  display: none;
}

.page-products .prod-step > summary:hover,
.page-products .prod-step > summary:focus-visible {
  background: rgba(201, 162, 39, .07);
}

.page-products .prod-step[open] > summary {
  border-bottom: 1px solid var(--line);
}

.page-products .prod-step-num {
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--gold);
  flex: 0 0 auto;
}

.page-products .prod-step-title {
  font-family: var(--font-display);
  font-size: 17px;
  line-height: 1.4;
  color: var(--paper);
  flex: 1 1 auto;
}

.page-products .prod-step > summary::after {
  content: "＋";
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--slate);
  flex: 0 0 auto;
  transition: color .2s var(--ease);
}

.page-products .prod-step[open] > summary::after {
  content: "－";
  color: var(--gold);
}

.page-products .prod-step-body {
  padding: 16px 20px 20px;
}

.page-products .prod-step-body p {
  font-size: 14px;
  line-height: 1.85;
  color: var(--body-text);
  margin: 0 0 12px;
  max-width: var(--measure);
}

.page-products .prod-step-body .mono {
  color: var(--gold-hi);
}

.page-products .prod-step-flag {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
  padding-top: 12px;
  border-top: 1px dashed rgba(93, 122, 138, .35);
  color: var(--slate) !important;
  margin-bottom: 0 !important;
}

/* ===== 问题三类 ===== */
.page-products .prod-trouble-list {
  display: grid;
  gap: 16px;
  margin: 26px 0 24px;
}

.page-products .prod-trouble {
  padding: 20px 20px 18px;
  border-radius: var(--r-card);
  border: 1px solid var(--line);
  background: linear-gradient(160deg, rgba(93, 122, 138, .12), rgba(8, 17, 28, .5));
}

.page-products .prod-trouble h3 {
  font-family: var(--font-display);
  font-size: 18px;
  color: var(--paper);
  margin: 0 0 9px;
}

.page-products .prod-trouble p {
  font-size: 14px;
  line-height: 1.85;
  color: var(--body-text);
  margin: 0 0 12px;
}

.page-products .prod-trouble-need {
  padding-top: 11px;
  border-top: 1px solid rgba(93, 122, 138, .28);
  color: var(--slate) !important;
  margin-bottom: 0 !important;
}

.page-products .prod-trouble-need .mono {
  color: var(--gold-hi);
}

/* ===== 求助区 ===== */
.page-products .prod-help {
  padding: 22px 20px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(201, 162, 39, .05);
}

.page-products .prod-help p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--body-text);
  margin: 0 0 12px;
  max-width: var(--measure);
}

.page-products .prod-help p:last-child {
  margin-bottom: 0;
}

.page-products .prod-help a {
  color: var(--gold-hi);
  text-decoration: none;
  border-bottom: 1px solid rgba(232, 199, 102, .45);
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.page-products .prod-help a:hover,
.page-products .prod-help a:focus-visible {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

.page-products .prod-help-meta {
  font-size: 13px !important;
  color: var(--slate) !important;
}

/* ===== 断点 ===== */
@media (min-width: 640px) {
  .page-products .prod-head {
    padding: 30px 0 54px;
  }

  .page-products .prod-quick {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px 20px;
  }

  .page-products .prod-quick li {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .page-products .prod-sizes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 26px;
  }

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

  .page-products .prod-trouble:first-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1024px) {
  .page-products .prod-head {
    padding: 34px 0 62px;
  }

  .page-products .prod-grid {
    grid-template-columns: 292px minmax(0, 1fr);
    gap: 52px;
    padding: 46px 0 104px;
  }

  .page-products .prod-rail {
    position: sticky;
    top: 34px;
    align-self: start;
  }

  .page-products .prod-sec {
    padding: 48px 0 52px;
  }

  .page-products .prod-paths {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }

  .page-products .prod-spec-layout {
    grid-template-columns: minmax(0, 232px) minmax(0, 1fr);
    gap: 30px;
    align-items: start;
  }

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

  .page-products .prod-trouble:first-child {
    grid-column: auto;
  }

  .page-products .prod-figure img {
    max-height: 460px;
    object-fit: cover;
  }

  .page-products .prod-figure--tall img {
    max-height: none;
    aspect-ratio: 3 / 4;
    object-fit: cover;
  }
}
</main>