.page-products {
  --ph-tier-1: #C7A12B;
  --ph-tier-2: #DF8A2D;
  --ph-tier-3: #C33A2C;
  --ph-tier-4: #8C2216;
  --ph-tree-w: 258px;
  background: var(--paper);
  color: var(--ink);
}

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

.page-products .container {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.page-products .lede {
  margin: 0;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--ink-72);
}

.page-products .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .82rem 1.35rem;
  font-family: var(--sans);
  font-size: .94rem;
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
  color: var(--ink);
  background: var(--snow);
  border: 3px solid var(--ink);
  box-shadow: var(--hard-sm);
  transition: transform .18s var(--ease), box-shadow .18s var(--ease), background-color .18s var(--ease);
}

.page-products .btn:hover,
.page-products .btn:focus-visible {
  transform: translate(-2px, -2px);
  box-shadow: 7px 7px 0 rgba(23, 22, 20, .88);
}

.page-products .btn--gold {
  background: var(--gold);
}

/* ---------- 首屏 ---------- */
.ph-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(1.4rem, 4vw, 2.6rem) clamp(2rem, 5.5vw, 3.8rem);
  background: var(--indigo);
  color: var(--snow);
}

.ph-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(135deg, rgba(199, 161, 43, .18) 0 2px, transparent 2px 16px);
  opacity: .55;
  pointer-events: none;
}

.ph-hero .container {
  position: relative;
  z-index: 1;
}

.page-products .breadcrumb__link {
  color: var(--snow-72);
  text-decoration: none;
  font-size: .82rem;
}

.page-products .breadcrumb__link:hover,
.page-products .breadcrumb__link:focus-visible {
  color: var(--gold);
}

.page-products .breadcrumb__item + .breadcrumb__item::before {
  color: var(--gold-45);
}

.ph-hero__grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: center;
  margin-top: clamp(1.2rem, 3vw, 2rem);
}

.ph-kicker {
  margin: 0 0 .9rem;
  font-family: var(--mono);
  font-size: .76rem;
  letter-spacing: .2em;
  color: var(--gold);
}

.ph-hero h1 {
  margin: 0 0 1rem;
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(1.9rem, 5.4vw, 3.3rem);
  line-height: 1.18;
  letter-spacing: .01em;
}

.ph-hero__lede {
  max-width: 34em;
  margin: 0 0 1.6rem;
  font-size: clamp(.96rem, 1.9vw, 1.08rem);
  line-height: 1.85;
  color: var(--snow-72);
}

.ph-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
}

.page-products .ph-hero .btn {
  border-color: var(--snow);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, .42);
}

.page-products .ph-hero .btn--ghost {
  background: transparent;
  color: var(--snow);
}

.page-products .ph-hero .btn--gold {
  color: var(--ink);
}

.ph-hero__media {
  margin: 0;
  border: 3px solid var(--gold);
  box-shadow: 10px 10px 0 rgba(0, 0, 0, .38);
  background: rgba(255, 251, 244, .06);
}

.ph-hero__media img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.ph-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  margin: clamp(1.6rem, 4vw, 2.4rem) 0 0;
  padding: 0;
  list-style: none;
  background: var(--gold-45);
  border: 1px solid var(--gold-45);
}

.ph-stats li {
  display: grid;
  gap: .2rem;
  padding: .9rem .8rem;
  background: var(--indigo);
}

.ph-stats__num {
  font-family: var(--mono);
  font-size: clamp(1.25rem, 3vw, 1.7rem);
  font-weight: 700;
  color: var(--gold);
  line-height: 1.1;
}

.ph-stats__label {
  font-size: .78rem;
  line-height: 1.5;
  color: var(--snow-56);
}

/* ---------- 章节骨架 ---------- */
.ph-chapter {
  padding-block: clamp(2.2rem, 5.5vw, 4.4rem);
}

.ph-chapter + .ph-chapter {
  border-top: 1px solid var(--hair);
}

.ph-chapter__head {
  max-width: 58rem;
  margin-bottom: clamp(1.4rem, 3.4vw, 2.3rem);
}

.ph-num {
  margin: 0 0 .55rem;
  font-family: var(--mono);
  font-size: .78rem;
  letter-spacing: .18em;
  color: var(--vermilion);
}

.ph-chapter h2 {
  margin: 0 0 .8rem;
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(1.45rem, 3.8vw, 2.15rem);
  line-height: 1.28;
}

.ph-note {
  margin: 1.4rem 0 0;
  padding-left: .85rem;
  border-left: 3px solid var(--gold);
  font-size: .88rem;
  line-height: 1.8;
  color: var(--ink-56);
}

.ph-note a {
  color: var(--flag-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 折叠组通用 ---------- */
.page-products .accordion {
  display: grid;
  gap: .85rem;
}

.page-products .accordion__item {
  background: var(--snow);
}

.page-products .accordion__trigger {
  display: flex;
  align-items: center;
  gap: .9rem;
  width: 100%;
  padding: 1rem 1.05rem;
  font-family: var(--sans);
  font-size: .95rem;
  text-align: left;
  color: var(--ink);
  background: none;
  border: 0;
  cursor: pointer;
}

.page-products .accordion__trigger:focus-visible {
  outline: 3px solid var(--flag-blue);
  outline-offset: -3px;
}

.page-products .accordion__icon {
  position: relative;
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  margin-left: auto;
  border: 2px solid var(--ink);
}

.page-products .accordion__icon::before,
.page-products .accordion__icon::after {
  content: "";
  position: absolute;
  background: var(--ink);
  transition: transform .2s var(--ease), opacity .2s var(--ease);
}

.page-products .accordion__icon::before {
  left: 3px;
  right: 3px;
  top: 50%;
  height: 2px;
  margin-top: -1px;
}

.page-products .accordion__icon::after {
  top: 3px;
  bottom: 3px;
  left: 50%;
  width: 2px;
  margin-left: -1px;
}

.page-products .accordion__trigger[aria-expanded="true"] .accordion__icon::after {
  opacity: 0;
  transform: scaleY(.1);
}

.page-products .accordion__panel {
  padding: 0 1.05rem 1.15rem;
  font-size: .92rem;
  line-height: 1.8;
  color: var(--ink-72);
}

.page-products .accordion__panel[hidden] {
  display: none;
}

.page-products .accordion__panel p {
  margin: 0;
}

.page-products .accordion__panel a {
  color: var(--flag-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 01 会员档位 ---------- */
.ph-tierband {
  margin: 0 0 clamp(1.4rem, 3vw, 2rem);
  background: var(--snow);
  border: var(--line);
  box-shadow: var(--hard-sm);
}

.ph-tierband img {
  width: 100%;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

.ph-tierband figcaption {
  padding: .7rem 1rem;
  border-top: 2px solid var(--hair);
  font-size: .82rem;
  line-height: 1.6;
  color: var(--ink-56);
}

.ph-tiers .accordion__item {
  border: var(--line);
  border-left-width: 11px;
  border-left-color: var(--tier, var(--gold));
  box-shadow: var(--hard-sm);
}

.tier-1 { --tier: var(--ph-tier-1); }
.tier-2 { --tier: var(--ph-tier-2); }
.tier-3 { --tier: var(--ph-tier-3); }
.tier-4 { --tier: var(--ph-tier-4); }

.ph-tier__num {
  flex: 0 0 auto;
  padding: .12rem .4rem;
  font-family: var(--mono);
  font-size: .9rem;
  font-weight: 700;
  color: var(--tier);
  border: 2px solid var(--tier);
}

.ph-tier__main {
  display: block;
  min-width: 0;
}

.ph-tier__name {
  display: block;
  font-family: var(--serif);
  font-size: 1.12rem;
  font-weight: 900;
  line-height: 1.3;
}

.ph-tier__sum {
  display: block;
  margin-top: .2rem;
  font-size: .84rem;
  line-height: 1.6;
  color: var(--ink-56);
}

.ph-list {
  display: grid;
  gap: .5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.ph-list li {
  position: relative;
  padding-left: 1.4rem;
  font-size: .9rem;
  line-height: 1.75;
}

.ph-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 8px;
  height: 8px;
  background: var(--tier, var(--gold));
  transform: rotate(45deg);
}

.ph-fit {
  margin: 1rem 0 0;
  padding-left: .8rem;
  border-left: 3px solid var(--tier, var(--gold));
  font-size: .84rem;
  line-height: 1.7;
  color: var(--ink-56);
}

/* ---------- 02 查看路径 ---------- */
.ph-chapter--path {
  background: linear-gradient(180deg, rgba(199, 161, 43, .12), transparent 60%);
}

.ph-steps {
  display: grid;
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.ph-steps li {
  padding: 1.1rem 1.1rem 1.25rem;
  background: var(--snow);
  border: var(--line);
  box-shadow: var(--hard-sm);
}

.ph-step__num {
  display: block;
  margin-bottom: .5rem;
  font-family: var(--mono);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--vermilion);
  line-height: 1;
}

.ph-steps h3 {
  margin: 0 0 .45rem;
  font-family: var(--serif);
  font-size: 1.05rem;
  font-weight: 900;
}

.ph-steps p {
  margin: 0;
  font-size: .89rem;
  line-height: 1.75;
  color: var(--ink-72);
}

/* ---------- 03 目录树 ---------- */
.ph-chapter--tree {
  background: linear-gradient(180deg, transparent, rgba(22, 50, 74, .06) 40%, transparent);
}

.ph-tree {
  display: grid;
  gap: clamp(1.2rem, 3vw, 2rem);
  align-items: start;
}

.ph-tree__nav {
  padding: 1rem;
  background: var(--indigo);
  color: var(--snow);
  border: 3px solid var(--ink);
  box-shadow: var(--hard);
}

.ph-tree__title {
  margin: 0 0 .75rem;
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .18em;
  color: var(--gold);
}

.ph-tree__list {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.ph-tree__list a {
  display: flex;
  gap: .6rem;
  align-items: baseline;
  padding: .48rem .55rem;
  font-size: .88rem;
  line-height: 1.4;
  color: var(--snow);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: background-color .18s var(--ease), border-color .18s var(--ease);
}

.ph-tree__list a span {
  font-family: var(--mono);
  font-size: .72rem;
  color: var(--gold);
}

.ph-tree__list a:hover,
.ph-tree__list a:focus-visible {
  background: rgba(199, 161, 43, .16);
  border-left-color: var(--gold);
}

.ph-tree__figure {
  margin: 1rem 0 0;
  padding-top: .9rem;
  border-top: 1px solid var(--gold-45);
}

.ph-tree__figure img {
  width: 100%;
  border: 2px solid var(--gold-45);
}

.ph-tree__figure figcaption {
  margin-top: .5rem;
  font-size: .76rem;
  line-height: 1.6;
  color: var(--snow-56);
}

.ph-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.ph-card {
  padding: 1.05rem;
  background: var(--snow);
  border: var(--line);
  box-shadow: var(--hard-sm);
  scroll-margin-top: 6rem;
}

.ph-card--accent {
  border-color: var(--gold);
}

.ph-card__idx {
  margin: 0 0 .35rem;
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .12em;
  color: var(--vermilion);
}

.ph-card h3 {
  margin: 0 0 .5rem;
  font-family: var(--serif);
  font-size: 1.08rem;
  font-weight: 900;
}

.ph-card p {
  margin: 0 0 .75rem;
  font-size: .87rem;
  line-height: 1.75;
  color: var(--ink-72);
}

.ph-card p:last-child {
  margin-bottom: 0;
}

.ph-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem;
}

.ph-chip {
  padding: .18rem .45rem;
  font-family: var(--sans);
  font-size: .71rem;
  line-height: 1.4;
  color: var(--ink-56);
  border: 1.5px solid var(--hair);
}

.ph-chip--gold {
  color: var(--deep-red);
  border-color: var(--gold);
  background: rgba(199, 161, 43, .16);
}

/* ---------- 04 更新节奏 ---------- */
.ph-timeline-figure {
  margin: 0 0 clamp(1.6rem, 4vw, 2.4rem);
  border: var(--line);
  box-shadow: var(--hard-sm);
  background: var(--snow);
}

.ph-timeline-figure img {
  width: 100%;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

.ph-timeline {
  position: relative;
  display: grid;
  gap: 1.35rem;
  margin: 0;
  padding: 0 0 0 .1rem;
  list-style: none;
}

.ph-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: .8rem;
  bottom: .8rem;
  width: 2px;
  background: var(--gold-45);
}

.ph-tl {
  position: relative;
  padding-left: 1.75rem;
}

.ph-tl__dot {
  position: absolute;
  left: 0;
  top: .35rem;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--paper);
  border: 3px solid var(--gold);
}

.ph-tl__dot--new {
  background: var(--vermilion);
  border-color: var(--deep-red);
}

.ph-tl__when {
  margin: 0 0 .25rem;
  font-family: var(--mono);
  font-size: .74rem;
  letter-spacing: .12em;
  color: var(--vermilion);
}

.ph-tl h3 {
  margin: 0 0 .4rem;
  font-family: var(--serif);
  font-size: 1.02rem;
  font-weight: 900;
  line-height: 1.4;
}

.ph-tl__text {
  margin: 0 0 .7rem;
  font-size: .86rem;
  line-height: 1.7;
  color: var(--ink-72);
}

.ph-tl__acc .accordion__item {
  border: 2px solid var(--ink);
}

.ph-tl__acc .accordion__trigger {
  padding: .6rem .7rem;
  font-size: .84rem;
}

.ph-tl__acc .accordion__panel {
  padding: 0 .7rem .8rem;
}

.ph-tl__acc .accordion__icon {
  width: 16px;
  height: 16px;
  border-width: 2px;
}

.ph-tl__toggle {
  font-weight: 700;
}

.ph-mini-list {
  display: grid;
  gap: .4rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.ph-mini-list li {
  position: relative;
  padding-left: 1.1rem;
  font-size: .82rem;
  line-height: 1.7;
}

.ph-mini-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .6em;
  width: 6px;
  height: 6px;
  background: var(--gold);
  transform: rotate(45deg);
}

/* ---------- 05 文件与校验 ---------- */
.ph-files {
  display: grid;
  gap: clamp(1.2rem, 3vw, 1.8rem);
  align-items: start;
}

.ph-files__acc .accordion__item {
  border: var(--line);
  box-shadow: var(--hard-sm);
}

.ph-file__ext {
  flex: 0 0 auto;
  padding: .18rem .45rem;
  font-family: var(--mono);
  font-size: .8rem;
  font-weight: 700;
  color: var(--snow);
  background: var(--ink);
  border: 2px solid var(--ink);
}

.ph-file--pdf .ph-file__ext { background: var(--vermilion); border-color: var(--vermilion); }
.ph-file--docx .ph-file__ext { background: var(--flag-blue); border-color: var(--flag-blue); }
.ph-file--xlsx .ph-file__ext { background: var(--indigo); border-color: var(--indigo); }
.ph-file--pptx .ph-file__ext { background: var(--amber); border-color: var(--amber); color: var(--ink); }
.ph-file--zip .ph-file__ext { background: var(--gold); border-color: var(--gold); color: var(--ink); }

.ph-file__name {
  font-size: .9rem;
  font-weight: 700;
  line-height: 1.5;
}

.ph-verify {
  padding: 1.2rem;
  background: var(--indigo);
  color: var(--snow);
  border: 3px solid var(--ink);
  box-shadow: var(--hard);
}

.ph-verify h3 {
  margin: 0 0 .7rem;
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 900;
  color: var(--gold);
}

.ph-verify p {
  margin: 0 0 1rem;
  font-size: .88rem;
  line-height: 1.8;
  color: var(--snow-72);
}

.ph-verify__list {
  display: grid;
  gap: .45rem;
  margin: 0 0 1.1rem;
  padding: 0;
  list-style: none;
}

.ph-verify__list li {
  position: relative;
  padding-left: 1.15rem;
  font-size: .85rem;
  line-height: 1.7;
  color: var(--snow-72);
}

.ph-verify__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 7px;
  height: 7px;
  background: var(--gold);
  transform: rotate(45deg);
}

.ph-verify__figure {
  margin: 0;
  border: 2px solid var(--gold-45);
}

.ph-verify__figure img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* ---------- 06 适用场景 ---------- */
.ph-chapter--scenes {
  background: linear-gradient(180deg, rgba(22, 50, 74, .06), transparent 70%);
}

.ph-scenes {
  display: grid;
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.ph-scene {
  padding: 1.1rem 1.1rem 1.2rem;
  background: var(--snow);
  border: 3px solid var(--ink);
  border-top-width: 8px;
  border-top-color: var(--sc, var(--vermilion));
  box-shadow: var(--hard-sm);
}

.ph-scene--1 { --sc: var(--vermilion); }
.ph-scene--2 { --sc: var(--indigo); }
.ph-scene--3 { --sc: var(--amber); }
.ph-scene--4 { --sc: var(--deep-red); }
.ph-scene--5 { --sc: var(--flag-blue); }

.ph-scene h3 {
  margin: 0 0 .45rem;
  font-family: var(--serif);
  font-size: 1.05rem;
  font-weight: 900;
}

.ph-scene p {
  margin: 0;
  font-size: .87rem;
  line-height: 1.75;
  color: var(--ink-72);
}

/* ---------- 07 选档参考 ---------- */
.ph-advice .accordion__item {
  border: 2px solid var(--ink);
  border-top: 5px solid var(--gold);
  box-shadow: var(--hard-sm);
}

.ph-advice__q {
  font-family: var(--serif);
  font-size: .98rem;
  font-weight: 900;
  line-height: 1.5;
}

/* ---------- 页尾行动区 ---------- */
.ph-cta {
  padding-block: clamp(2rem, 5vw, 3.4rem);
  background: var(--indigo);
  color: var(--snow);
  border-top: 3px solid var(--ink);
}

.ph-cta h2 {
  margin: 0 0 .7rem;
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(1.4rem, 3.6vw, 2rem);
  line-height: 1.3;
}

.ph-cta p {
  max-width: 40em;
  margin: 0 0 1.5rem;
  font-size: .92rem;
  line-height: 1.8;
  color: var(--snow-72);
}

.ph-cta__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: .8rem;
}

.ph-cta__grid a {
  display: grid;
  gap: .3rem;
  padding: .95rem 1rem;
  text-decoration: none;
  color: var(--snow);
  border: 2px solid var(--gold-45);
  transition: background-color .18s var(--ease), border-color .18s var(--ease), transform .18s var(--ease);
}

.ph-cta__grid a:hover,
.ph-cta__grid a:focus-visible {
  background: rgba(199, 161, 43, .16);
  border-color: var(--gold);
  transform: translateY(-2px);
}

.ph-cta__label {
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .14em;
  color: var(--gold);
}

.ph-cta__text {
  font-size: .94rem;
  font-weight: 700;
  line-height: 1.5;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .ph-stats {
    grid-template-columns: repeat(3, 1fr);
  }

  .ph-cards {
    grid-template-columns: repeat(2, 1fr);
  }

  .ph-cta__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 760px) {
  .ph-steps,
  .ph-scenes {
    grid-template-columns: repeat(2, 1fr);
  }

  .ph-scene--5 {
    grid-column: 1 / -1;
  }
}

@media (min-width: 940px) {
  .ph-hero__grid {
    grid-template-columns: 1.05fr .95fr;
  }

  .ph-tree {
    grid-template-columns: var(--ph-tree-w) minmax(0, 1fr);
  }

  .ph-tree__nav {
    position: sticky;
    top: 6rem;
    max-height: calc(100vh - 8rem);
    overflow-y: auto;
  }

  .ph-files {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  }

  .ph-verify {
    position: sticky;
    top: 6rem;
  }

  .ph-timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.1rem;
    padding-top: 2.4rem;
  }

  .ph-timeline::before {
    left: 0;
    right: 0;
    top: 1.05rem;
    bottom: auto;
    width: auto;
    height: 2px;
  }

  .ph-tl {
    padding-left: 0;
  }

  .ph-tl__dot {
    top: -1.85rem;
    left: 0;
  }

  .ph-tl__acc .accordion__trigger {
    padding: .55rem .6rem;
  }
}

@media (min-width: 1020px) {
  .ph-stats {
    grid-template-columns: repeat(6, 1fr);
  }

  .ph-cta__grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .btn,
  .page-products .accordion__icon::before,
  .page-products .accordion__icon::after,
  .page-products .ph-tree__list a,
  .page-products .ph-cta__grid a {
    transition: none;
  }

  .page-products .btn:hover,
  .page-products .ph-cta__grid a:hover {
    transform: none;
  }
}
<<<END>>>