.page-products {
  --pd-edge: 20px;
  --pd-gap: 24px;
  --pd-shadow: 8px 8px 0 rgba(6, 10, 22, .72);
  --pd-shadow-sm: 6px 6px 0 rgba(6, 10, 22, .66);
  color: var(--text);
  padding-bottom: 88px;
}

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

.page-products a:focus-visible,
.page-products summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-products .pd-visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- 面包屑 ---------- */
.page-products .pd-crumb {
  max-width: var(--frame-max);
  margin: 0 auto;
  padding: 18px var(--pd-edge) 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}

.page-products .pd-crumb a {
  color: var(--blue-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-products .pd-crumb a:hover,
.page-products .pd-crumb a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 首屏 ---------- */
.page-products .pd-hero {
  max-width: var(--frame-max);
  margin: 0 auto;
  padding: 22px var(--pd-edge) 0;
  display: grid;
  gap: var(--pd-gap);
}

.page-products .pd-eyebrow {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--cyan);
}

.page-products .pd-title {
  margin: 0 0 14px;
  font-family: var(--narrow);
  font-weight: 800;
  font-size: clamp(34px, 9vw, 68px);
  line-height: 1.02;
  letter-spacing: -.02em;
  color: var(--text);
}

.page-products .pd-lead {
  margin: 0 0 24px;
  font-size: 16px;
  line-height: 1.9;
  color: var(--muted);
  max-width: 46ch;
}

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

.page-products .pd-path__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 14px 16px;
  border: 2px solid var(--rail-line);
  background: var(--ink-2);
  text-decoration: none;
  color: inherit;
  transition: transform var(--t-mid) var(--ease),
              border-color var(--t-fast) var(--ease),
              background var(--t-mid) var(--ease);
}

.page-products .pd-path__link:hover,
.page-products .pd-path__link:focus-visible {
  transform: translateY(-2px);
  border-color: var(--cyan);
  background: linear-gradient(120deg, var(--indigo), var(--ink-2));
}

.page-products .pd-path__num {
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--cyan);
  padding-top: 2px;
}

.page-products .pd-path__label {
  display: block;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 5px;
}

.page-products .pd-path__desc {
  display: block;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-products .pd-hero__visual {
  border: 2px solid var(--rail-line);
  padding: 10px;
  box-shadow: var(--pd-shadow);
  background:
    repeating-linear-gradient(0deg, rgba(43, 58, 107, .32) 0 1px, transparent 1px 28px),
    repeating-linear-gradient(90deg, rgba(43, 58, 107, .32) 0 1px, transparent 1px 28px),
    linear-gradient(160deg, rgba(26, 32, 80, .92), rgba(13, 21, 48, .96));
}

.page-products .pd-hero__visual img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--rail-line);
  background: var(--ink);
}

.page-products .pd-figure__cap {
  margin: 10px 2px 0;
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.7;
  letter-spacing: .06em;
  color: var(--muted);
}

/* ---------- 章节通用 ---------- */
.page-products .pd-section {
  max-width: var(--frame-max);
  margin: 0 auto;
  padding: 56px var(--pd-edge) 0;
}

.page-products .pd-head {
  display: grid;
  gap: 10px;
  max-width: 68ch;
  margin-bottom: 26px;
}

.page-products .pd-head__eyebrow {
  margin: 0;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--cyan);
}

.page-products .pd-head__title {
  margin: 0;
  font-family: var(--narrow);
  font-weight: 800;
  font-size: clamp(23px, 5.4vw, 38px);
  line-height: 1.15;
  letter-spacing: -.02em;
}

.page-products .pd-head__note {
  margin: 0;
  font-size: 16px;
  line-height: 1.9;
  color: var(--muted);
}

/* ---------- 七组资料拼贴 ---------- */
.page-products .pd-mosaic {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-products .pd-mat {
  position: relative;
  padding: 18px 18px 16px;
  border: 2px solid var(--rail-line);
  box-shadow: var(--pd-shadow);
  background: linear-gradient(170deg, rgba(26, 32, 80, .86), rgba(13, 21, 48, .96));
  transition: transform var(--t-mid) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-products .pd-mat::after {
  content: "";
  position: absolute;
  top: -2px;
  right: 42px;
  width: 34px;
  height: 2px;
  background: var(--cyan);
}

.page-products .pd-mat:hover,
.page-products .pd-mat:focus-within {
  transform: translateY(-2px);
  border-color: var(--blue);
}

.page-products .pd-mat__num {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--orange-soft);
}

.page-products .pd-mat__title {
  margin: 0 0 8px;
  font-family: var(--narrow);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -.01em;
}

.page-products .pd-mat__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
}

.page-products .pd-mat__meta {
  margin: 12px 0 0;
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--blue-soft);
}

.page-products .pd-mat__more {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px dashed var(--rail-line);
}

.page-products .pd-mat__more summary {
  cursor: pointer;
  list-style: none;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--blue-soft);
  transition: color var(--t-fast) var(--ease);
}

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

.page-products .pd-mat__more summary::before {
  content: "+ ";
  color: var(--cyan);
}

.page-products .pd-mat__more[open] summary::before {
  content: "\2212 ";
}

.page-products .pd-mat__more summary:hover {
  color: var(--cyan);
}

.page-products .pd-mat__more p {
  margin: 8px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 图片容器 ---------- */
.page-products .pd-figure {
  margin: 28px 0 0;
  padding: 10px;
  border: 2px solid var(--rail-line);
  background: var(--ink-2);
  box-shadow: var(--pd-shadow);
}

.page-products .pd-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--rail-line);
  background: var(--ink);
}

/* ---------- 格式 / 页数 / 编号 ---------- */
.page-products .pd-rule-strip {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px;
  border: 2px solid var(--rail-line);
  background: var(--rail-line);
  box-shadow: var(--pd-shadow);
}

.page-products .pd-rule {
  padding: 20px 18px;
  background: var(--ink-2);
}

.page-products .pd-rule:nth-child(2) {
  background: linear-gradient(150deg, rgba(26, 32, 80, .9), var(--ink-2));
}

.page-products .pd-rule__num {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cyan);
}

.page-products .pd-rule__title {
  margin: 0 0 8px;
  font-family: var(--narrow);
  font-weight: 700;
  font-size: 19px;
}

.page-products .pd-rule__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
}

.page-products .pd-pairs {
  margin-top: 28px;
  padding: 18px;
  border: 2px solid var(--rail-line);
  background: linear-gradient(120deg, rgba(26, 32, 80, .68), rgba(6, 10, 22, .72));
}

.page-products .pd-pairs__title {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--orange-soft);
}

.page-products .pd-pair {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
  padding: 12px 0;
  border-top: 1px solid var(--rail-line);
}

.page-products .pd-pair__doc {
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-products .pd-pair__name {
  flex: 1 1 14ch;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--text);
}

.page-products .pd-pair__arrow {
  font-size: 12px;
  color: var(--blue-soft);
}

.page-products .pd-pair__col {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}

/* ---------- 运行环境 ---------- */
.page-products .pd-env {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 26px;
}

.page-products .pd-env__card {
  padding: 18px;
  border: 2px solid var(--rail-line);
  box-shadow: var(--pd-shadow);
  background: linear-gradient(180deg, rgba(7, 51, 47, .88), rgba(6, 10, 22, .94));
}

.page-products .pd-env__tag {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-products .pd-env__title {
  margin: 0 0 10px;
  font-family: var(--narrow);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.3;
}

.page-products .pd-env__list {
  margin: 0;
  padding-left: 16px;
  display: grid;
  gap: 8px;
}

.page-products .pd-env__list li {
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 对照与引用 ---------- */
.page-products .pd-steps {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
  border: 2px solid var(--rail-line);
  background: var(--rail-line);
}

.page-products .pd-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 16px 18px;
  background: var(--ink-2);
}

.page-products .pd-step:nth-child(even) {
  background: linear-gradient(110deg, rgba(26, 32, 80, .7), var(--ink-2));
}

.page-products .pd-step__num {
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--orange);
  padding-top: 2px;
}

.page-products .pd-step__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text);
}

/* ---------- 速查卡 ---------- */
.page-products .pd-quick {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-products .pd-quick__card {
  display: grid;
  gap: 6px;
  padding: 18px 18px 16px;
  border: 2px solid var(--rail-line);
  background: var(--ink-2);
  box-shadow: var(--pd-shadow-sm);
  text-decoration: none;
  color: inherit;
  transition: transform var(--t-mid) var(--ease),
              border-color var(--t-fast) var(--ease),
              background var(--t-mid) var(--ease);
}

.page-products .pd-quick__card:hover,
.page-products .pd-quick__card:focus-visible {
  transform: translateY(-2px);
  border-color: var(--blue);
  background: linear-gradient(150deg, rgba(26, 32, 80, .92), var(--ink-2));
}

.page-products .pd-quick__num {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cyan);
}

.page-products .pd-quick__title {
  font-family: var(--narrow);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.3;
}

.page-products .pd-quick__desc {
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-products .pd-quick__go {
  margin-top: 4px;
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--blue-soft);
}

/* ---------- 下载失败与校验 ---------- */
.page-products .pd-fix {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-products .pd-fix__item {
  display: grid;
  gap: 8px;
  padding: 18px;
  border: 2px solid var(--rail-line);
  border-left: 4px solid var(--orange);
  background: linear-gradient(100deg, rgba(74, 21, 38, .6), var(--ink-2) 72%);
}

.page-products .pd-fix__step {
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--orange-soft);
}

.page-products .pd-fix__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text);
}

.page-products .pd-fix__item a {
  color: var(--blue-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--blue-soft);
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-products .pd-fix__item a:hover,
.page-products .pd-fix__item a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 延伸入口 ---------- */
.page-products .pd-next {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-products .pd-next__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: center;
  padding: 20px;
  border: 2px solid var(--rail-line);
  box-shadow: var(--pd-shadow);
  background: linear-gradient(120deg, var(--indigo), var(--ink-2));
  color: var(--text);
  text-decoration: none;
  transition: transform var(--t-mid) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-products .pd-next__link:hover,
.page-products .pd-next__link:focus-visible {
  transform: translateY(-2px);
  border-color: var(--cyan);
}

.page-products .pd-next__num {
  font-size: 16px;
  color: var(--cyan);
}

.page-products .pd-next__title {
  font-family: var(--narrow);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.4;
}

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

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

@media (min-width: 760px) {
  .page-products .pd-mosaic {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 18px;
  }

  .page-products .pd-mat:nth-child(1) { grid-column: span 3; }
  .page-products .pd-mat:nth-child(2) { grid-column: span 3; }
  .page-products .pd-mat:nth-child(3) { grid-column: span 2; }
  .page-products .pd-mat:nth-child(4) { grid-column: span 4; }
  .page-products .pd-mat:nth-child(5) { grid-column: span 4; }
  .page-products .pd-mat:nth-child(6) { grid-column: span 2; }
  .page-products .pd-mat:nth-child(7) { grid-column: span 6; }

  .page-products .pd-rule-strip {
    grid-template-columns: 1.1fr .9fr 1.3fr;
  }

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

@media (min-width: 780px) {
  .page-products .pd-env {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-products .pd-env__card:nth-child(2) {
    margin-top: 26px;
  }

  .page-products .pd-env__card:nth-child(3) {
    margin-top: 52px;
  }
}

@media (min-width: 900px) {
  .page-products {
    --pd-edge: 28px;
    --pd-gap: 32px;
  }

  .page-products .pd-hero {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
    padding-top: 40px;
  }

  .page-products .pd-section {
    padding-top: 84px;
  }

  .page-products .pd-figure {
    margin-top: 34px;
  }
}