.page-products {
  --pp-panel: rgba(30, 59, 55, .34);
  --pp-panel-soft: rgba(30, 59, 55, .16);
  --pp-glow: rgba(59, 240, 208, .16);
  --pp-warm: rgba(255, 162, 58, .18);
  background: var(--bg);
  color: var(--fg);
}

/* ---------------- 首屏 ---------------- */
.page-products .pp-hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(115% 82% at 86% -8%, var(--pp-glow), transparent 58%),
    linear-gradient(176deg, var(--c-night) 4%, var(--c-ink) 76%);
  border-bottom: 1px solid var(--c-line);
}

.page-products .pp-hero::before {
  content: "";
  position: absolute;
  left: -6%;
  right: -6%;
  bottom: 24%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(59, 240, 208, .40), rgba(255, 162, 58, .22), transparent);
  transform: rotate(-6deg);
  transform-origin: left center;
  pointer-events: none;
}

.page-products .pp-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 46px);
  align-items: center;
  padding-top: clamp(28px, 5vw, 56px);
  padding-bottom: clamp(38px, 6vw, 76px);
}

.page-products .pp-hero__copy .breadcrumbs {
  margin-bottom: 14px;
}

.page-products .pp-hero__copy .annotation {
  display: block;
  margin: 0 0 10px;
}

.page-products .pp-hero h1 {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(28px, 5.4vw, 52px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--c-mint);
}

.page-products .pp-hero__lead {
  margin: 18px 0 0;
  max-width: 34em;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.75;
  color: var(--c-cool);
}

.page-products .pp-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-products .pp-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 30px 0 0;
  background: var(--c-line);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-products .pp-facts__cell {
  background: rgba(6, 25, 23, .72);
  padding: 14px 12px;
}

.page-products .pp-facts dt {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--c-slate);
}

.page-products .pp-facts dd {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 4px;
  font-family: var(--font-mono);
  color: var(--c-cyan);
}

.page-products .pp-facts__num {
  font-size: clamp(22px, 3.4vw, 30px);
  font-weight: 700;
  line-height: 1;
}

.page-products .pp-facts__unit {
  font-size: 13px;
  color: var(--c-slate);
}

.page-products .pp-hero__media {
  margin: 0;
}

.page-products .pp-hero__media .media__frame {
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-2);
  overflow: hidden;
}

.page-products .pp-hero__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

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

/* ---------------- 主布局 ---------------- */
.page-products .pp-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 38px);
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-products .pp-rail {
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
  padding: 14px 0 10px;
}

.page-products .pp-rail__label {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--c-slate);
}

.page-products .pp-rail__steps {
  position: relative;
  display: flex;
  gap: 16px;
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-products .pp-rail__steps li {
  flex: 0 0 auto;
}

.page-products .pp-rail__steps a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 0;
  text-decoration: none;
  color: var(--c-slate);
  font-size: 13.5px;
  white-space: nowrap;
  transition: color .18s ease;
}

.page-products .pp-rail__steps a:hover,
.page-products .pp-rail__steps a:focus-visible {
  color: var(--c-cyan);
}

.page-products .pp-rail__dot {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: 1px solid var(--c-cyan);
  background: var(--c-ink);
}

.page-products .pp-stream {
  min-width: 0;
}

/* ---------------- 章节通用 ---------------- */
.page-products .pp-section {
  padding-top: clamp(30px, 4.5vw, 52px);
  scroll-margin-top: calc(var(--header-h) + 18px);
}

.page-products .pp-section + .pp-section {
  margin-top: clamp(18px, 3vw, 30px);
  border-top: 1px solid var(--c-line);
}

.page-products .pp-section .section-head {
  margin-bottom: 18px;
}

.page-products .pp-intro {
  margin: 0 0 22px;
  max-width: 36em;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--c-cool);
}

.page-products .pp-note {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-slate);
}

.page-products .pp-note a {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(59, 240, 208, .42);
}

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

/* ---------------- 服务清单 ---------------- */
.page-products .pp-list {
  border-top: 1px solid var(--c-line);
}

.page-products .pp-item {
  border-bottom: 1px solid var(--c-line);
}

.page-products .pp-item > summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 6px;
  cursor: pointer;
  list-style: none;
  transition: background-color .18s ease;
}

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

.page-products .pp-item > summary:hover,
.page-products .pp-item > summary:focus-visible {
  background: var(--pp-panel-soft);
}

.page-products .pp-item__name {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 15.5px;
  font-weight: 600;
  color: var(--c-cool);
  letter-spacing: -0.01em;
}

.page-products .pp-item[open] .pp-item__name {
  color: var(--c-mint);
}

.page-products .pp-item__freq {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--c-slate);
  white-space: nowrap;
}

.page-products .pp-item__caret {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  margin-left: 2px;
  border-right: 1.5px solid var(--c-slate);
  border-bottom: 1.5px solid var(--c-slate);
  transform: rotate(45deg);
  transition: transform .18s ease, border-color .18s ease;
}

.page-products .pp-item[open] .pp-item__caret {
  transform: rotate(-135deg);
  border-color: var(--c-cyan);
}

.page-products .pp-item__body {
  padding: 0 6px 18px 6px;
}

.page-products .pp-item__body p {
  margin: 0;
  max-width: 36em;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--c-slate);
}

/* ---------------- 双栏图文 ---------------- */
.page-products .pp-cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.4vw, 40px);
  align-items: start;
}

.page-products .pp-cols__text {
  min-width: 0;
}

.page-products .pp-cols__text .pp-intro {
  margin-bottom: 18px;
}

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

.page-products .pp-figure .media__frame {
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-1);
  background: var(--c-night);
}

.page-products .pp-figure figcaption {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: .04em;
  line-height: 1.6;
  color: var(--c-slate);
}

.page-products .pp-figure--wide {
  margin-bottom: 22px;
}

/* ---------------- 要点列表 ---------------- */
.page-products .pp-bullets {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-products .pp-bullets li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--c-slate);
}

.page-products .pp-bullets li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 7px;
  height: 1px;
  background: var(--c-cyan);
}

.page-products .pp-bullets strong {
  display: inline-block;
  margin-right: 6px;
  color: var(--c-cool);
  font-weight: 600;
}

.page-products .pp-chiprow {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.page-products .pp-chiprow .chip {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
}

/* ---------------- 字段列表 ---------------- */
.page-products .pp-fields {
  margin: 0;
  border-top: 1px solid var(--c-line);
}

.page-products .pp-fields__row {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 14px;
  padding: 13px 0;
  border-bottom: 1px solid var(--c-line);
}

.page-products .pp-fields dt {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--c-cyan);
  padding-top: 2px;
}

.page-products .pp-fields dd {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.74;
  color: var(--c-slate);
}

/* ---------------- 资源档位 ---------------- */
.page-products .pp-section--tiers {
  margin-top: clamp(30px, 4.5vw, 52px);
  padding: clamp(22px, 3.4vw, 36px);
  border: 1px solid rgba(255, 162, 58, .24);
  border-left: 2px solid rgba(255, 162, 58, .62);
  border-radius: var(--radius);
  background:
    radial-gradient(90% 70% at 6% 0%, rgba(94, 27, 46, .34), transparent 62%),
    linear-gradient(180deg, rgba(22, 36, 63, .34), rgba(11, 42, 38, .1));
}

.page-products .pp-favcount {
  display: inline-block;
  margin: 0 0 18px;
  padding: 6px 12px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--c-slate);
}

.page-products .pp-favcount span {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--c-amber);
  margin: 0 2px;
}

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

.page-products .pp-tier {
  display: flex;
  flex-direction: column;
  padding: 20px 20px 22px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--pp-panel), rgba(11, 42, 38, .92));
  box-shadow: var(--shadow-1);
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}

.page-products .pp-tier:hover,
.page-products .pp-tier:focus-within {
  transform: translateY(-2px);
  box-shadow: var(--shadow-2);
}

.page-products .pp-tier--a:hover,
.page-products .pp-tier--a:focus-within {
  border-color: rgba(255, 162, 58, .58);
}

.page-products .pp-tier--b:hover,
.page-products .pp-tier--b:focus-within {
  border-color: rgba(59, 240, 208, .55);
}

.page-products .pp-tier--c:hover,
.page-products .pp-tier--c:focus-within {
  border-color: rgba(199, 210, 208, .42);
}

.page-products .pp-tier__head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.page-products .pp-tier__badge {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1px solid currentColor;
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  line-height: 1;
}

.page-products .pp-tier--a .pp-tier__badge {
  color: var(--c-amber);
}

.page-products .pp-tier--b .pp-tier__badge {
  color: var(--c-cyan);
}

.page-products .pp-tier--c .pp-tier__badge {
  color: var(--c-cool);
}

.page-products .pp-tier__title {
  flex: 1 1 auto;
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--c-mint);
}

.page-products .pp-tier .fav-mark {
  flex: 0 0 auto;
  font-size: 17px;
  line-height: 1;
  color: var(--c-slate);
  transition: color .18s ease, transform .18s ease;
}

.page-products .pp-tier .fav-mark:hover,
.page-products .pp-tier .fav-mark:focus-visible {
  color: var(--c-amber);
  transform: scale(1.08);
}

.page-products .pp-tier .fav-mark[aria-pressed="true"] {
  color: var(--c-amber);
}

.page-products .pp-tier__desc {
  margin: 0 0 16px;
  font-size: 14px;
  line-height: 1.74;
  color: var(--c-slate);
}

.page-products .pp-tier__list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  border-top: 1px solid var(--c-line);
}

.page-products .pp-tier__list li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 0;
  border-bottom: 1px solid var(--c-line);
  font-size: 14px;
  color: var(--c-cool);
}

.page-products .pp-tier__code {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--c-cyan);
}

.page-products .pp-tier--a .pp-tier__code {
  color: var(--c-amber);
}

.page-products .pp-tier__fit {
  margin: auto 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-slate);
}

/* ---------------- 步骤路径 ---------------- */
.page-products .pp-steps {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  border-left: 1px solid rgba(59, 240, 208, .28);
}

.page-products .pp-step {
  position: relative;
  padding: 0 0 24px;
}

.page-products .pp-step:last-child {
  padding-bottom: 0;
}

.page-products .pp-step__node {
  position: absolute;
  left: -32px;
  top: 6px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  border: 1px solid var(--c-cyan);
  background: var(--c-ink);
  box-shadow: 0 0 0 4px rgba(11, 42, 38, .92);
}

.page-products .pp-step:nth-child(even) .pp-step__node {
  border-color: var(--c-amber);
}

.page-products .pp-step__title {
  margin: 0 0 6px;
  font-size: 15.5px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--c-mint);
}

.page-products .pp-step__body p {
  margin: 0;
  max-width: 34em;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--c-slate);
}

.page-products .pp-help {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-top: 30px;
  padding: 20px 22px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: linear-gradient(120deg, rgba(22, 36, 63, .5), rgba(11, 42, 38, .7));
}

.page-products .pp-help__text {
  margin: 0;
  max-width: 32em;
  font-size: 14.5px;
  line-height: 1.74;
  color: var(--c-cool);
}

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

/* ---------------- 响应式 ---------------- */
@media (min-width: 640px) {
  .page-products .pp-tier__list li {
    font-size: 14.5px;
  }
}

@media (min-width: 760px) {
  .page-products .pp-tiers {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-products .pp-cols {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center;
  }

  .page-products .pp-cols--flip .pp-figure {
    order: -1;
  }
}

@media (min-width: 900px) {
  .page-products .pp-hero__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.04fr);
    align-items: center;
  }

  .page-products .pp-hero__media {
    align-self: center;
  }
}

@media (min-width: 1024px) {
  .page-products .pp-layout {
    grid-template-columns: minmax(180px, var(--col-index)) minmax(0, 1fr);
    align-items: start;
    gap: clamp(28px, 3vw, 44px);
  }

  .page-products .pp-rail {
    position: sticky;
    top: calc(var(--header-h) + 20px);
    border-top: 0;
    border-bottom: 0;
    padding: 4px 0 0;
  }

  .page-products .pp-rail__steps {
    display: block;
    padding: 0;
    overflow: visible;
  }

  .page-products .pp-rail__steps::before {
    content: "";
    position: absolute;
    left: 4px;
    top: 10px;
    bottom: 10px;
    width: 1px;
    background: linear-gradient(180deg, var(--c-cyan), rgba(59, 240, 208, .16) 72%, transparent);
  }

  .page-products .pp-rail__steps li {
    display: block;
  }

  .page-products .pp-rail__steps a {
    padding: 10px 0;
    font-size: 14px;
  }

  .page-products .pp-rail__dot {
    position: relative;
    z-index: 1;
    width: 9px;
    height: 9px;
    margin-left: 0;
    box-shadow: 0 0 0 4px var(--bg);
  }

  .page-products .pp-stream {
    max-width: 900px;
  }
}

@media (min-width: 1180px) {
  .page-products .pp-tiers {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}