.page-products {
  --pp-gap: clamp(16px, 2.6vw, 30px);
  --pp-sec-gap: clamp(44px, 7vw, 88px);
  padding-bottom: clamp(36px, 6vw, 72px);
}

/* ---------- 首屏 ---------- */
.page-products .pp-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background: var(--ink);
}

.page-products .pp-hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .42;
}

.page-products .pp-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    repeating-linear-gradient(180deg, rgba(63, 224, 208, .07) 0 1px, transparent 1px 5px),
    linear-gradient(180deg, rgba(10, 17, 32, .5) 0%, rgba(10, 17, 32, .88) 58%, var(--ink) 100%);
}

.page-products .pp-hero-inner {
  position: relative;
  z-index: 2;
  padding-top: clamp(42px, 8vw, 104px);
  padding-bottom: clamp(34px, 5.5vw, 64px);
}

.page-products .pp-hero h1 {
  margin: 14px 0 20px;
  max-width: 18ch;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2.15rem, 7vw, 5rem);
  line-height: 1.04;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-products .pp-hero .lede {
  max-width: 62ch;
  color: var(--muted);
  font-size: clamp(1rem, 1.6vw, 1.0625rem);
  line-height: 1.82;
}

.page-products .pp-hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 30px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-products .pp-hero-facts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.page-products .pp-fact-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--amber);
  letter-spacing: .02em;
}

.page-products .pp-fact-label {
  font-size: .8125rem;
  color: var(--muted);
}

/* ---------- 分类标签条（吸附） ---------- */
.page-products .pp-tagbar {
  position: sticky;
  top: 0;
  z-index: 14;
  border-bottom: 1px solid var(--line);
  background: rgba(10, 17, 32, .94);
  backdrop-filter: blur(10px);
}

.page-products .pp-tagbar-inner {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 12px 0;
  scrollbar-width: none;
}

.page-products .pp-tagbar-inner::-webkit-scrollbar {
  display: none;
}

.page-products .pp-tab {
  position: relative;
  flex: 0 0 auto;
  display: inline-flex;
  align-items: baseline;
  gap: 9px;
  padding: 9px 16px 11px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  color: var(--muted);
  font-size: .9375rem;
  text-decoration: none;
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease), transform .2s var(--ease);
}

.page-products .pp-tab .mono {
  font-size: .6875rem;
  color: var(--amber);
}

.page-products .pp-tab:hover {
  color: var(--paper);
  border-color: var(--cyan);
  background: rgba(63, 224, 208, .07);
  transform: translateY(-2px);
}

.page-products .pp-tab:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 2px;
}

.page-products .pp-tab.is-active {
  color: var(--paper);
  background: var(--panel);
  border-color: var(--line);
}

.page-products .pp-tab.is-active::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 5px;
  height: 2px;
  border-radius: 2px;
  background: var(--coral);
}

/* ---------- 章节通用 ---------- */
.page-products .pp-sec {
  padding-top: var(--pp-sec-gap);
}

.page-products .pp-sec:first-of-type {
  padding-top: clamp(30px, 5vw, 60px);
}

.page-products .rule-band {
  margin-top: var(--pp-sec-gap);
}

/* ---------- 01 三大分类 ---------- */
.page-products .pp-cat {
  position: relative;
  display: grid;
  gap: var(--pp-gap);
  margin-bottom: var(--pp-gap);
  padding: clamp(18px, 2.6vw, 30px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(155deg, var(--panel) 0%, var(--panel-2) 100%);
  overflow: hidden;
}

.page-products .pp-cat::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--pp-accent, var(--cyan));
}

.page-products .pp-cat--activity { --pp-accent: var(--coral); }
.page-products .pp-cat--record { --pp-accent: var(--cyan); }
.page-products .pp-cat--doc { --pp-accent: var(--amber); }

.page-products .pp-cat-figure {
  margin: 0;
}

.page-products .pp-media-4x3 { aspect-ratio: 4 / 3; }
.page-products .pp-media-7x4 { aspect-ratio: 7 / 4; }

.page-products .figure-media {
  overflow: hidden;
  border-radius: var(--r-md);
  background: var(--panel-2);
}

.page-products .figure-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-products .pp-cat .figure-cap {
  margin-top: 10px;
}

.page-products .pp-cat-body h3 {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.25rem, 2.4vw, 1.75rem);
  line-height: 1.28;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-products .pp-cat-body p {
  margin: 0 0 13px;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.8;
}

.page-products .pp-cat-tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
}

.page-products .pp-cat-tags-label {
  font-size: .8125rem;
  letter-spacing: .04em;
  color: var(--muted);
}

/* ---------- 02 子标签树 ---------- */
.page-products .pp-tree {
  display: grid;
  gap: 14px;
}

.page-products .pp-branch {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--panel-2);
  overflow: hidden;
}

.page-products .pp-branch summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 17px;
  cursor: pointer;
  list-style: none;
  color: var(--paper);
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1rem;
  line-height: 1.4;
  transition: background .2s var(--ease);
}

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

.page-products .pp-branch summary:hover {
  background: rgba(63, 224, 208, .06);
}

.page-products .pp-branch summary:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: -3px;
}

.page-products .pp-branch summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--cyan);
}

.page-products .pp-branch[open] summary::after {
  content: "\2013";
  color: var(--amber);
}

.page-products .pp-branch-no {
  font-family: var(--font-mono);
  font-size: .8125rem;
  color: var(--amber);
  letter-spacing: .08em;
}

.page-products .pp-branch-name {
  flex: 1 1 auto;
}

.page-products .pp-branch-count {
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--muted);
}

.page-products .pp-leaves {
  display: grid;
  gap: 7px;
  margin: 0;
  padding: 0 15px 15px;
  list-style: none;
}

.page-products .pp-leaves li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 11px;
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  background: rgba(10, 17, 32, .6);
  transition: border-color .2s var(--ease), background .2s var(--ease);
}

.page-products .pp-leaves li:hover {
  border-color: var(--cyan);
  background: rgba(63, 224, 208, .07);
}

.page-products .pp-leaf-name {
  color: var(--paper);
  font-size: .9375rem;
}

.page-products .pp-leaf-note {
  color: var(--muted);
  font-size: .8125rem;
  white-space: nowrap;
}

/* ---------- 03 高频道页面 ---------- */
.page-products .pp-fav-layout {
  display: grid;
  gap: var(--pp-gap);
}

.page-products .pp-fav-banner {
  margin: 0;
}

.page-products .pp-fav-grid {
  display: grid;
  gap: 9px;
  grid-template-columns: repeat(auto-fill, minmax(158px, 1fr));
}

.page-products .pp-fav {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 10px 11px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--panel-2);
  cursor: pointer;
  transition: transform .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}

.page-products .pp-fav:hover {
  transform: translateY(-2px);
  border-color: var(--cyan);
}

.page-products .pp-fav:has(input:checked) {
  border-color: var(--cyan);
  background: rgba(63, 224, 208, .1);
}

.page-products .pp-fav input {
  flex: 0 0 auto;
  width: 15px;
  height: 15px;
  margin: 0;
  accent-color: var(--cyan);
  cursor: pointer;
}

.page-products .pp-fav input:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 2px;
}

.page-products .pp-fav-name {
  flex: 1 1 auto;
  min-width: 0;
  color: var(--paper);
  font-size: .875rem;
  line-height: 1.4;
}

.page-products .pp-fav-tag {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .04em;
  color: var(--muted);
}

.page-products .pp-fav-side {
  padding: 20px 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(160deg, rgba(63, 224, 208, .1) 0%, rgba(18, 33, 58, .92) 52%);
}

.page-products .pp-fav-side h3 {
  margin: 8px 0 14px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--paper);
}

.page-products .pp-steps {
  margin: 0 0 14px;
  padding-left: 20px;
  color: var(--muted);
  font-size: .9375rem;
  line-height: 1.78;
}

.page-products .pp-steps li {
  margin-bottom: 9px;
}

.page-products .pp-steps li::marker {
  font-family: var(--font-mono);
  color: var(--amber);
}

.page-products .pp-side-note {
  margin: 0;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  color: var(--muted);
  font-size: .8125rem;
  line-height: 1.7;
}

/* ---------- 04 档案区 ---------- */
.page-products .pp-arch-figure {
  margin: 0 0 var(--pp-gap);
}

.page-products .pp-archives {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  grid-template-columns: repeat(auto-fill, minmax(142px, 1fr));
}

.page-products .pp-box {
  position: relative;
  display: grid;
  gap: 5px;
  padding: 13px 13px 15px 17px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--panel-2);
  transition: transform .2s var(--ease), border-color .2s var(--ease);
}

.page-products .pp-box::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  bottom: 12px;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: var(--pp-box-accent, var(--line));
}

.page-products .pp-box--activity { --pp-box-accent: var(--coral); }
.page-products .pp-box--record { --pp-box-accent: var(--cyan); }
.page-products .pp-box--doc { --pp-box-accent: var(--amber); }

.page-products .pp-box:hover {
  transform: translateY(-3px);
  border-color: var(--cyan);
}

.page-products .pp-box-no {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--amber);
}

.page-products .pp-box-cat {
  font-size: .8125rem;
  color: var(--paper);
}

.page-products .pp-box-count {
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--muted);
}

.page-products .pp-arch-note {
  margin: var(--pp-gap) 0 0;
  max-width: 68ch;
  color: var(--muted);
  font-size: .9375rem;
  line-height: 1.82;
}

/* ---------- 05 三种找法 ---------- */
.page-products .pp-routes {
  display: grid;
  gap: var(--pp-gap);
}

.page-products .pp-route {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--panel-2);
  overflow: hidden;
}

.page-products .pp-route::after {
  content: "";
  position: absolute;
  right: -34px;
  top: -34px;
  width: 96px;
  height: 96px;
  border-radius: 50%;
  background: var(--pp-route-accent, var(--cyan));
  opacity: .14;
}

.page-products .pp-route--cyan { --pp-route-accent: var(--cyan); }
.page-products .pp-route--amber { --pp-route-accent: var(--amber); }
.page-products .pp-route--coral { --pp-route-accent: var(--coral); }

.page-products .pp-route-no {
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--pp-route-accent, var(--cyan));
}

.page-products .pp-route h3 {
  margin: 10px 0 12px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--paper);
}

.page-products .pp-route-when {
  margin: 0 0 12px;
  padding-left: 12px;
  border-left: 2px solid var(--pp-route-accent, var(--cyan));
  color: var(--paper);
  font-size: .875rem;
  line-height: 1.7;
}

.page-products .pp-route p {
  color: var(--muted);
  font-size: .9375rem;
  line-height: 1.78;
  margin: 0 0 16px;
}

.page-products .pp-route-link {
  margin-top: auto;
  align-self: flex-start;
  font-size: .9375rem;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.page-products .pp-route-link:hover {
  color: var(--paper);
  border-bottom-color: var(--cyan);
}

.page-products .pp-route-link:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 3px;
}

.page-products .pp-route-tip {
  margin: var(--pp-gap) 0 0;
  color: var(--muted);
  font-size: .9375rem;
  line-height: 1.8;
}

.page-products .pp-route-tip a {
  color: var(--amber);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  transition: color .2s var(--ease);
}

.page-products .pp-route-tip a:hover {
  color: var(--paper);
}

/* ---------- 06 流转路径 ---------- */
.page-products .pp-flow {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: pp-flow;
}

.page-products .pp-flow-item {
  position: relative;
  padding: clamp(16px, 2.2vw, 22px) clamp(16px, 2.2vw, 24px) clamp(16px, 2.2vw, 22px) clamp(20px, 3vw, 30px);
  border: 1px solid var(--line);
  border-left: 3px solid var(--amber);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  background: linear-gradient(120deg, rgba(240, 178, 74, .07) 0%, rgba(18, 33, 58, .92) 42%);
}

.page-products .pp-flow-no {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--amber);
}

.page-products .pp-flow-item h3 {
  margin: 8px 0 8px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.0625rem;
  color: var(--paper);
}

.page-products .pp-flow-item p {
  margin: 0;
  color: var(--muted);
  font-size: .9375rem;
  line-height: 1.78;
}

.page-products .pp-flow-note {
  margin: var(--pp-gap) 0 0;
  padding: 14px 16px;
  border: 1px dashed var(--line);
  border-radius: var(--r-sm);
  color: var(--muted);
  font-size: .875rem;
  line-height: 1.76;
}

/* ---------- 结尾通道 ---------- */
.page-products .pp-cta {
  display: grid;
  gap: clamp(18px, 2.6vw, 30px);
  padding: clamp(22px, 3.4vw, 40px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background:
    linear-gradient(135deg, rgba(255, 107, 94, .1) 0%, rgba(10, 17, 32, 0) 42%),
    linear-gradient(200deg, rgba(63, 224, 208, .12) 0%, rgba(18, 33, 58, .95) 60%);
}

.page-products .pp-cta h2 {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.4rem, 3vw, 2rem);
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-products .pp-cta p {
  margin: 0;
  max-width: 62ch;
  color: var(--muted);
  font-size: .9375rem;
  line-height: 1.8;
}

.page-products .pp-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-products .pp-routes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-products .pp-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-products .pp-archives .pp-box:nth-child(3n + 2) {
    margin-top: 26px;
  }
  .page-products .pp-archives .pp-box:nth-child(5n + 4) {
    margin-top: 48px;
  }
}

@media (min-width: 880px) {
  .page-products .pp-cat {
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
    align-items: center;
    gap: clamp(22px, 3vw, 40px);
  }
  .page-products .pp-cat--flip .pp-cat-figure {
    order: 2;
  }
  .page-products .pp-tree {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }
  .page-products .pp-cta {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: center;
  }
  .page-products .pp-cta-actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1024px) {
  .page-products .pp-fav-layout {
    grid-template-columns: minmax(0, 1fr) 292px;
    align-items: start;
    gap: var(--pp-gap);
  }
  .page-products .pp-fav-banner {
    grid-column: 1 / -1;
  }
  .page-products .pp-fav-side {
    align-self: stretch;
  }
  .page-products .pp-routes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-products .pp-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-products .pp-flow-item {
    border-left: none;
    border-top: 3px solid var(--amber);
    border-radius: 0 0 var(--r-md) var(--r-md);
  }
}
<<<END>>>