.page-products {
  --pp-cut: 14px;
  --pp-gap: clamp(16px, 2.4vw, 28px);
  --pp-line: 1px solid var(--mist-200);
  --pp-soft: 0 2px 0 rgba(14, 27, 46, .04), 0 20px 40px -32px rgba(14, 27, 46, .5);
  color: var(--ink-900);
}

.page-products .prod-crumbs {
  padding-top: clamp(20px, 3vw, 34px);
}

.page-products .crumbs {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--mist-500);
}
.page-products .crumbs a {
  color: var(--mist-500);
  text-decoration: none;
}
.page-products .crumbs a:hover { color: var(--ink-500); }
.page-products .crumbs__sep { padding: 0 8px; color: var(--mist-200); }

/* ---------- N°01 总览 ---------- */
.page-products .prod-overview {
  padding-top: clamp(24px, 3.4vw, 44px);
}

.page-products .prod-overview__grid {
  display: grid;
  gap: clamp(26px, 4vw, 54px);
  align-items: center;
}

.page-products .prod-overview__lead h1 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(30px, 5.6vw, 60px);
  line-height: 1.14;
  letter-spacing: -.02em;
  margin: 14px 0 0;
  max-width: 15em;
}

.page-products .prod-overview__lead .lede {
  margin-top: clamp(16px, 2vw, 24px);
  max-width: 34em;
}

.page-products .prod-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin-top: clamp(20px, 2.6vw, 28px);
}
.page-products .prod-meta .mono {
  display: inline-block;
  padding: 5px 12px;
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--ink-700);
  background: var(--mist-050);
  border-left: 3px solid var(--amber-500);
  clip-path: polygon(0 0, 100% 0, 100% 100%, var(--cut-sm) 100%, 0 calc(100% - var(--cut-sm)));
}

.page-products .prod-overview__figure {
  margin: 0;
}
.page-products .prod-overview__figure .media {
  clip-path: polygon(var(--pp-cut) 0, 100% 0, 100% calc(100% - var(--pp-cut)), calc(100% - var(--pp-cut)) 100%, 0 100%, 0 var(--pp-cut));
  overflow: hidden;
  background: var(--mist-050);
}

.page-products .prod-read {
  margin-top: clamp(40px, 6vw, 76px);
  padding-top: clamp(24px, 3vw, 36px);
  border-top: var(--pp-line);
}

.page-products .prod-read__title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(20px, 2.6vw, 26px);
  letter-spacing: -.01em;
  margin: 0 0 clamp(18px, 2.4vw, 26px);
}

.page-products .prod-read__rows {
  display: grid;
  gap: 0;
}
.page-products .prod-read__row {
  display: grid;
  gap: 6px 24px;
  padding: 18px 0;
  border-top: 1px dashed var(--mist-200);
}
.page-products .prod-read__row:first-child { border-top: 0; padding-top: 0; }
.page-products .prod-read__row p {
  margin: 0;
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink-700);
  max-width: 46em;
}
.page-products .prod-read__key {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--amber-500);
  font-weight: 700;
}

.page-products .prod-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin-top: clamp(26px, 3.4vw, 38px);
  padding-top: clamp(18px, 2.2vw, 26px);
  border-top: var(--pp-line);
}
.page-products .prod-jump a {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  color: var(--ink-700);
  padding: 6px 14px;
  background: var(--mist-050);
  border-bottom: 2px solid transparent;
  transition: background .18s ease, border-color .18s ease, color .18s ease;
}
.page-products .prod-jump a:hover,
.page-products .prod-jump a[data-active] {
  background: var(--amber-200);
  border-bottom-color: var(--amber-500);
  color: var(--ink-900);
}

.page-products .prod-cross {
  margin: clamp(24px, 3vw, 34px) 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist-500);
  max-width: 52em;
}
.page-products .prod-cross a {
  color: var(--ink-500);
  text-decoration: underline;
  text-decoration-color: var(--amber-500);
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}
.page-products .prod-cross a:hover { color: var(--ink-900); }

/* ---------- 章节头 ---------- */
.page-products .prod-sec-head {
  max-width: 44em;
  margin-bottom: clamp(26px, 3.4vw, 42px);
}
.page-products .prod-sec-head .sec-title {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(24px, 3.6vw, 40px);
  line-height: 1.22;
  letter-spacing: -.015em;
}
.page-products .prod-sec-head__lede {
  margin: 16px 0 0;
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink-700);
}

/* ---------- N°02 专题索引 ---------- */
.page-products .prod-topics__figure {
  margin: 0 0 clamp(28px, 3.6vw, 44px);
}
.page-products .prod-topics__figure .media {
  clip-path: polygon(0 0, calc(100% - var(--pp-cut)) 0, 100% var(--pp-cut), 100% 100%, var(--pp-cut) 100%, 0 calc(100% - var(--pp-cut)));
  overflow: hidden;
  background: var(--paper);
}

.page-products .prod-topic-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--pp-gap);
  padding-bottom: 0;
}

.page-products .prod-topic {
  position: relative;
  padding: 26px 24px 24px;
  background: var(--paper);
  border: var(--pp-line);
  box-shadow: var(--pp-soft);
  transition: transform .22s ease, box-shadow .22s ease;
}
.page-products .prod-topic::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 4px;
  height: 100%;
  background: var(--amber-500);
  opacity: .18;
  transition: opacity .22s ease;
}
.page-products .prod-topic:hover::after { opacity: 1; }

.page-products .prod-topic__no {
  display: block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--mist-500);
}
.page-products .prod-topic__name {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(20px, 2.4vw, 24px);
  letter-spacing: -.01em;
  margin: 8px 0 0;
  color: var(--ink-900);
}
.page-products .prod-topic__count {
  display: inline-block;
  margin: 10px 0 0;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--ink-900);
  background: var(--amber-200);
  padding: 3px 10px;
}
.page-products .prod-topic__desc {
  margin: 14px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-700);
}
.page-products .prod-topic__list {
  list-style: none;
  margin: 16px 0 0;
  padding: 16px 0 0;
  border-top: 1px dashed var(--mist-200);
  display: grid;
  gap: 8px;
}
.page-products .prod-topic__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist-500);
}
.page-products .prod-topic__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 8px;
  height: 2px;
  background: var(--amber-500);
}

.page-products .prod-topics__sum {
  margin: clamp(30px, 4vw, 48px) 0 0;
  font-size: 13px;
  letter-spacing: .05em;
  color: var(--mist-500);
  padding-top: 18px;
  border-top: var(--pp-line);
}

/* ---------- N°03 三步路线 ---------- */
.page-products .prod-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--pp-gap);
  counter-reset: prodstep;
}

.page-products .prod-step {
  position: relative;
  padding: 28px 24px 26px clamp(24px, 4vw, 40px);
  background: var(--mist-050);
  clip-path: polygon(0 0, calc(100% - var(--pp-cut)) 0, 100% var(--pp-cut), 100% 100%, var(--pp-cut) 100%, 0 calc(100% - var(--pp-cut)));
}
.page-products .prod-step::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 4px;
  height: 100%;
  background: var(--ink-700);
}
.page-products .prod-step__no {
  display: block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--amber-500);
}
.page-products .prod-step__title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(19px, 2.3vw, 23px);
  line-height: 1.35;
  letter-spacing: -.01em;
  margin: 10px 0 0;
}
.page-products .prod-step__case {
  margin: 10px 0 0;
  font-size: 14px;
  color: var(--ink-500);
}
.page-products .prod-step__body {
  margin: 14px 0 0;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--ink-700);
  max-width: 46em;
}
.page-products .prod-step__time {
  margin: 16px 0 0;
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--mist-500);
}

/* ---------- 场景实录 62/38 ---------- */
.page-products .prod-scene__grid {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
}
.page-products .prod-scene__body .sec-title {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(24px, 3.6vw, 40px);
  line-height: 1.2;
  letter-spacing: -.015em;
  max-width: 20em;
}
.page-products .prod-scene__body .lede {
  margin-top: 18px;
  max-width: 40em;
}

.page-products .prod-case {
  margin-top: clamp(22px, 3vw, 32px);
  border-top: var(--pp-line);
  border-bottom: var(--pp-line);
}
.page-products .prod-case > summary {
  list-style: none;
  cursor: pointer;
  padding: 18px 40px 18px 0;
  position: relative;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 700;
  color: var(--ink-900);
  letter-spacing: .01em;
  transition: color .18s ease;
}
.page-products .prod-case > summary::-webkit-details-marker { display: none; }
.page-products .prod-case > summary::after {
  content: "";
  position: absolute;
  right: 8px;
  top: 50%;
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--amber-500);
  border-bottom: 2px solid var(--amber-500);
  transform: translateY(-70%) rotate(45deg);
  transition: transform .2s ease;
}
.page-products .prod-case[open] > summary::after {
  transform: translateY(-30%) rotate(-135deg);
}
.page-products .prod-case > summary:hover { color: var(--ink-500); }

.page-products .prod-case .prose {
  padding-bottom: clamp(20px, 2.6vw, 30px);
  animation: prodFade .22s ease both;
}
@keyframes prodFade {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}
.page-products .prod-case .prose h3 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 18px;
  line-height: 1.5;
  letter-spacing: -.005em;
  margin: 26px 0 8px;
  color: var(--ink-900);
}
.page-products .prod-case .prose h3:first-child { margin-top: 6px; }
.page-products .prod-case .prose p {
  margin: 0 0 12px;
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink-700);
  max-width: 40em;
}
.page-products .prod-case .prose ul {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
  max-width: 40em;
}
.page-products .prod-case .prose li {
  position: relative;
  padding-left: 20px;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--ink-900);
}
.page-products .prod-case .prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .76em;
  width: 10px;
  height: 3px;
  background: var(--amber-500);
}
.page-products .prod-case .prose a {
  color: var(--ink-500);
  text-decoration: underline;
  text-decoration-color: var(--amber-500);
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}
.page-products .prod-case .prose a:hover { color: var(--ink-900); }

.page-products .prod-scene__aside {
  display: grid;
  gap: clamp(16px, 2vw, 22px);
  align-content: start;
}

.page-products .prod-note {
  background: var(--ink-900);
  color: var(--paper);
  padding: 24px 22px;
  clip-path: polygon(0 0, calc(100% - var(--pp-cut)) 0, 100% var(--pp-cut), 100% 100%, var(--pp-cut) 100%, 0 calc(100% - var(--pp-cut)));
}
.page-products .prod-note__ver {
  display: inline-block;
  margin: 0;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--ink-900);
  background: var(--amber-500);
  padding: 3px 10px;
  font-weight: 700;
}
.page-products .prod-note__title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.5;
  margin: 14px 0 0;
  color: var(--paper);
}
.page-products .prod-note p {
  margin: 10px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist-050);
}
.page-products .prod-note__foot {
  padding-top: 14px;
  margin-top: 16px !important;
  border-top: 1px solid rgba(252, 251, 248, .18);
  font-size: 12px !important;
  letter-spacing: .04em;
  color: var(--mist-200) !important;
}

.page-products .prod-scene__fig {
  margin: 0;
}
.page-products .prod-scene__fig .media {
  clip-path: polygon(var(--pp-cut) 0, 100% 0, 100% calc(100% - var(--pp-cut)), calc(100% - var(--pp-cut)) 100%, 0 100%, 0 var(--pp-cut));
  overflow: hidden;
  background: var(--mist-050);
}
.page-products .media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-products .prod-scene__link {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist-500);
}
.page-products .prod-scene__link a {
  color: var(--ink-500);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-color: var(--amber-500);
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}
.page-products .prod-scene__link a:hover { color: var(--ink-900); }

.page-products .prod-scene__fig--wide {
  margin-top: clamp(24px, 3vw, 34px);
}

/* ---------- N°07 经验与误区 ---------- */
.page-products .prod-lessons__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--pp-gap);
}

.page-products .prod-lesson {
  position: relative;
  padding: 26px 24px;
  background: var(--paper);
  border-top: 4px solid var(--ink-700);
  box-shadow: var(--pp-soft);
}
.page-products .prod-lesson__no {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--amber-500);
}
.page-products .prod-lesson h3 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(18px, 2.2vw, 21px);
  line-height: 1.4;
  letter-spacing: -.01em;
  margin: 10px 0 0;
}
.page-products .prod-lesson p {
  margin: 12px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-700);
}
.page-products .prod-lesson p a {
  color: var(--ink-500);
  text-decoration: underline;
  text-decoration-color: var(--amber-500);
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}
.page-products .prod-lesson__wrong {
  padding-top: 14px;
  border-top: 1px dashed var(--mist-200);
  color: var(--mist-500) !important;
  font-size: 15px !important;
}
.page-products .prod-lesson__wrong .mono {
  display: inline-block;
  margin-right: 8px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--ink-900);
  background: var(--mist-200);
  padding: 2px 8px;
}

/* ---------- N°08 怎么挑 ---------- */
.page-products .prod-pick__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--pp-gap);
}

.page-products .prod-pick__card {
  display: block;
  padding: 24px 22px;
  background: var(--paper);
  border: var(--pp-line);
  text-decoration: none;
  color: inherit;
  transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease;
}
.page-products .prod-pick__card:hover {
  transform: translateY(-4px);
  border-color: var(--amber-500);
  box-shadow: var(--pp-soft);
}
.page-products .prod-pick__key {
  display: block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--mist-500);
  padding-left: 14px;
  position: relative;
}
.page-products .prod-pick__key::before {
  content: "";
  position: absolute;
  left: 0;
  top: .7em;
  width: 8px;
  height: 2px;
  background: var(--amber-500);
}
.page-products .prod-pick__card h3 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 18px;
  line-height: 1.45;
  letter-spacing: -.005em;
  margin: 12px 0 0;
  color: var(--ink-900);
}
.page-products .prod-pick__card p {
  margin: 10px 0 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ink-700);
}

.page-products .prod-cta {
  margin-top: clamp(34px, 4.6vw, 56px);
  padding: clamp(26px, 3.4vw, 40px) clamp(22px, 3vw, 40px);
  background: var(--ink-700);
  color: var(--paper);
  display: grid;
  gap: 20px;
  align-items: center;
  clip-path: polygon(0 0, calc(100% - var(--pp-cut)) 0, 100% var(--pp-cut), 100% 100%, var(--pp-cut) 100%, 0 calc(100% - var(--pp-cut)));
}
.page-products .prod-cta__text {
  margin: 0;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--mist-050);
  max-width: 44em;
}
.page-products .prod-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-products .prod-cta__actions .btn {
  text-decoration: none;
  white-space: nowrap;
}

/* ---------- 断点 ---------- */
@media (min-width: 680px) {
  .page-products .prod-read__row {
    grid-template-columns: 140px minmax(0, 1fr);
    align-items: start;
  }
  .page-products .prod-read__key { padding-top: 4px; }
  .page-products .prod-topic-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .page-products .prod-lessons__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .page-products .prod-pick__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .page-products .prod-cta { grid-template-columns: minmax(0, 1fr) auto; }
  .page-products .prod-steps { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (min-width: 960px) {
  .page-products .prod-overview__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 1fr);
    gap: clamp(40px, 5vw, 76px);
  }
  .page-products .prod-overview__figure { transform: translateY(18px); }
  .page-products .prod-scene__grid {
    grid-template-columns: minmax(0, 62fr) minmax(0, 38fr);
    gap: clamp(34px, 4.4vw, 64px);
  }
  .page-products .prod-scene__aside {
    position: sticky;
    top: 108px;
    align-self: start;
  }
  .page-products .prod-topic-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    padding-bottom: 40px;
  }
  .page-products .prod-topic-grid > .prod-topic:nth-child(even) { transform: translateY(38px); }
  .page-products .prod-topic-grid > .prod-topic:nth-child(even):hover { transform: translateY(32px); }
  .page-products .prod-topic-grid > .prod-topic:nth-child(odd):hover { transform: translateY(-6px); }
  .page-products .prod-topics__figure .media { max-height: 460px; }
  .page-products .prod-topics__figure .media img { height: 460px; object-fit: cover; }
}

@media (min-width: 1140px) {
  .page-products .prod-steps { gap: clamp(20px, 2.4vw, 34px); }
  .page-products .prod-lessons__grid { gap: clamp(20px, 2.4vw, 30px); }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .prod-topic,
  .page-products .prod-pick__card,
  .page-products .prod-jump a,
  .page-products .prod-case .prose {
    transition: none !important;
    animation: none !important;
  }
  .page-products .prod-topic-grid > .prod-topic:nth-child(even),
  .page-products .prod-overview__figure {
    transform: none !important;
  }
}