.page-products {
  --pp-border: 1px solid var(--line-700);
  --pp-dash: 1px dashed rgba(39, 64, 92, .75);
  --pp-rail-w: 168px;
}

/* ---------- 面包屑 ---------- */
.page-products .breadcrumb {
  padding-block: clamp(18px, 2.6vw, 30px) 0;
}

/* ---------- 首屏 ---------- */
.page-products__hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(30px, 4.6vw, 58px) clamp(30px, 4vw, 52px);
  border-bottom: var(--pp-border);
}

.page-products__hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(39, 64, 92, .6) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(39, 64, 92, .6) 1px, transparent 1px);
  background-size: 88px 88px;
  -webkit-mask-image: radial-gradient(130% 110% at 12% 0%, #000 0%, transparent 70%);
  mask-image: radial-gradient(130% 110% at 12% 0%, #000 0%, transparent 70%);
  opacity: .45;
  pointer-events: none;
}

.page-products__hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  align-items: end;
}

.page-products__eyebrow {
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--cyan-400);
}

.page-products__title {
  margin: 0;
  font-size: clamp(31px, 5.2vw, 56px);
  line-height: 1.08;
  letter-spacing: -.02em;
  text-wrap: balance;
}

.page-products__lede {
  margin: 20px 0 0;
  max-width: 40em;
  font-size: clamp(15px, 1.35vw, 17px);
  line-height: 1.82;
  color: var(--body-text);
}

.page-products__hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-products__index {
  border-left: 2px solid var(--cyan-400);
  padding-left: 18px;
}

.page-products__index-title {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: .28em;
  color: var(--mute-400);
}

.page-products__index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-products__index-list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 6px 0;
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--body-text);
  text-decoration: none;
  transition: color .2s var(--ease);
}

.page-products__index-list a .mono {
  font-size: 11px;
  color: var(--cyan-400);
  letter-spacing: .1em;
}

.page-products__index-list a:hover {
  color: var(--cyan-400);
}

/* ---------- 主体骨架 ---------- */
.page-products__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  align-items: start;
  padding-block: clamp(36px, 5vw, 64px) clamp(56px, 8vw, 96px);
}

.page-products__content {
  min-width: 0;
}

.page-products__content > .section + .section {
  margin-top: clamp(46px, 6vw, 84px);
}

/* ---------- 左侧刻度导航 ---------- */
.page-products .rail {
  display: none;
}

/* ---------- 章节标题 ---------- */
.page-products .section-head {
  max-width: 46em;
}

.page-products .section-head__num {
  position: relative;
  margin: 0 0 16px;
  padding-top: 16px;
  font-size: 12px;
  letter-spacing: .24em;
  color: var(--cyan-400);
}

.page-products .section-head__num::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 44px;
  height: 2px;
  background: var(--cyan-400);
}

.page-products .section-head__title {
  margin: 0;
  font-size: clamp(21px, 2.6vw, 30px);
  line-height: 1.28;
  letter-spacing: -.01em;
}

.page-products .section-head__note {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mute-400);
}

/* ---------- 图片容器 ---------- */
.page-products__figure {
  margin: clamp(24px, 3.4vw, 38px) 0 0;
}

.page-products__media {
  position: relative;
  overflow: hidden;
  border: var(--pp-border);
  background: var(--ink-900);
  border-radius: var(--radius);
}

.page-products__media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    rgba(59, 227, 220, .05) 0px,
    rgba(59, 227, 220, .05) 1px,
    transparent 1px,
    transparent 4px
  );
}

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

.page-products__media--wide { aspect-ratio: 7 / 4; }
.page-products__media--portrait { aspect-ratio: 9 / 11; }
.page-products__media--square { aspect-ratio: 10 / 7; }

.page-products .figure__caption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.72;
  color: var(--mute-400);
}

/* ---------- 分段切换 ---------- */
.page-products__tabs {
  margin-top: clamp(26px, 3.4vw, 40px);
}

.page-products .tabs__list {
  display: flex;
  gap: 4px;
  border-bottom: var(--pp-border);
  overflow-x: auto;
}

.page-products .tab {
  position: relative;
  appearance: none;
  border: 0;
  background: none;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 13px 20px;
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .02em;
  white-space: nowrap;
  color: var(--mute-400);
  cursor: pointer;
  transition: color .2s var(--ease);
}

.page-products .tab::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: var(--cyan-400);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .24s var(--ease);
}

.page-products .tab:hover { color: var(--paper-050); }

.page-products .tab[aria-selected="true"] { color: var(--paper-050); }
.page-products .tab[aria-selected="true"]::after { transform: scaleX(1); }

.page-products .tab__idx {
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--cyan-400);
}

.page-products__panel {
  padding-top: clamp(22px, 3vw, 32px);
}

.page-products__panel-lede {
  margin: 0 0 6px;
  max-width: 44em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--body-text);
}

/* ---------- 键值对比表 ---------- */
.page-products__facts {
  margin: 14px 0 0;
}

.page-products__fact {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 15px 0;
  border-top: var(--pp-border);
}

.page-products__fact:last-child {
  border-bottom: var(--pp-border);
}

.page-products__fact dt {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--cyan-400);
}

.page-products__fact dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: var(--body-text);
}

/* ---------- 专区内容 ---------- */
.page-products__zone {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 3.6vw, 44px);
  align-items: start;
  margin-top: clamp(24px, 3.4vw, 38px);
}

.page-products__zone-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-products__zone-list > li {
  padding: 18px 0;
  border-top: var(--pp-border);
}

.page-products__zone-list > li:last-child {
  border-bottom: var(--pp-border);
}

.page-products__zone-idx {
  margin: 0 0 8px;
  font-size: 11.5px;
  letter-spacing: .18em;
  color: var(--cyan-400);
}

.page-products__zone-title {
  margin: 0 0 6px;
  font-size: 16.5px;
  line-height: 1.4;
  letter-spacing: 0;
}

.page-products__zone-body {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--body-text);
}

.page-products__zone-figure {
  margin: 0;
}

/* ---------- 分支图 ---------- */
.page-products__branch {
  display: block;
  width: 100%;
  height: auto;
}

/* ---------- 三条路径 ---------- */
.page-products__paths {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 28px);
  margin-top: clamp(26px, 3.6vw, 40px);
}

.page-products__path {
  padding: clamp(18px, 2.6vw, 26px);
  border: var(--pp-border);
  background: var(--ink-900);
  border-radius: var(--radius);
}

.page-products__path-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-bottom: 6px;
}

.page-products__path-head .h3 {
  margin: 0;
  font-size: 17px;
}

/* ---------- 步骤 ---------- */
.page-products .steps {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
}

.page-products .step {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 12px;
  padding: 14px 0 0;
  margin-top: 14px;
  border-top: var(--pp-dash);
}

.page-products .step:first-child {
  border-top: 0;
  margin-top: 0;
  padding-top: 4px;
}

.page-products .step__num {
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--cyan-400);
  padding-top: 2px;
}

.page-products .step__title {
  margin: 0 0 5px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--paper-050);
}

.page-products .step__body {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--body-text);
}

/* ---------- 说明段落 ---------- */
.page-products__note {
  margin: clamp(22px, 3vw, 32px) 0 0;
  max-width: 46em;
  padding-left: 16px;
  border-left: 2px solid var(--line-700);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mute-400);
}

.page-products__note a {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(59, 227, 220, .45);
  transition: border-color .2s var(--ease);
}

.page-products__note a:hover {
  border-bottom-color: var(--cyan-400);
}

/* ---------- 换设备：左右分栏 ---------- */
.page-products__split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.6vw, 42px);
  align-items: start;
  margin-top: clamp(24px, 3.4vw, 38px);
}

.page-products__split-figure {
  margin: 0;
}

.page-products__skip {
  margin-top: clamp(24px, 3.2vw, 34px);
  padding: clamp(16px, 2.4vw, 22px);
  border: var(--pp-border);
  background: var(--ink-900);
  border-radius: var(--radius);
}

.page-products__skip-title {
  margin: 0 0 12px;
  font-size: 11.5px;
  letter-spacing: .2em;
  color: var(--amber-300);
}

.page-products__skip-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-products__skip-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--body-text);
}

/* ---------- 状态说明 ---------- */
.page-products__status-intro {
  margin-top: clamp(22px, 3vw, 32px);
}

.page-products__status-lede {
  margin: 0 0 20px;
  max-width: 44em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--body-text);
}

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

.page-products__legend li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding: 12px 0;
  border-top: var(--pp-border);
  font-size: 14.5px;
  line-height: 1.74;
  color: var(--body-text);
}

.page-products__legend li:last-child {
  border-bottom: var(--pp-border);
}

/* ---------- 折叠条目 ---------- */
.page-products__folds {
  margin-top: clamp(26px, 3.6vw, 40px);
  border-top: var(--pp-border);
}

.page-products .fold {
  border-bottom: var(--pp-border);
  background: transparent;
}

.page-products .fold__summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 2px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 600;
  color: var(--paper-050);
  transition: color .2s var(--ease);
}

.page-products .fold__summary::-webkit-details-marker { display: none; }

.page-products .fold__summary::after {
  content: "";
  margin-left: auto;
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  border-right: 1.5px solid var(--cyan-400);
  border-bottom: 1.5px solid var(--cyan-400);
  transform: rotate(45deg);
  transition: transform .22s var(--ease);
}

.page-products .fold[open] > .fold__summary::after {
  transform: rotate(-135deg);
}

.page-products .fold__summary:hover { color: var(--cyan-400); }

.page-products .fold__idx {
  flex: 0 0 auto;
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--cyan-400);
}

.page-products .fold__summary-text {
  min-width: 0;
}

.page-products .fold__body {
  padding: 0 2px 20px 34px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--body-text);
}

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

.page-products__fold-meta {
  margin-top: 10px !important;
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--mute-400);
}

/* ---------- 求助卡片 ---------- */
.page-products__help {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: clamp(24px, 3.4vw, 36px);
}

.page-products__help-card {
  position: relative;
  padding: clamp(20px, 2.8vw, 28px);
  border: var(--pp-border);
  background: var(--ink-900);
  border-radius: var(--radius);
}

.page-products__help-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 46px;
  height: 2px;
  background: var(--cyan-400);
}

.page-products__help-card--amber::before {
  background: var(--amber-500);
}

.page-products__help-kicker {
  margin: 0 0 12px;
  font-size: 11.5px;
  letter-spacing: .2em;
  color: var(--mute-400);
}

.page-products__help-card .h3 {
  margin: 0 0 10px;
  font-size: 18px;
}

.page-products__help-card p {
  margin: 0 0 20px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--body-text);
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-products__hero-inner {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  }

  .page-products__fact {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 22px;
  }

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

@media (min-width: 900px) {
  .page-products__layout {
    grid-template-columns: var(--pp-rail-w) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-products .rail {
    display: flex;
    flex-direction: column;
    position: sticky;
    top: calc(var(--header-h) + 28px);
    border-left: var(--pp-border);
  }

  .page-products .rail__link {
    position: relative;
    display: block;
    padding: 10px 0 10px 18px;
    font-size: 13px;
    line-height: 1.45;
    color: var(--mute-400);
    text-decoration: none;
    letter-spacing: .01em;
    transition: color .2s var(--ease);
  }

  .page-products .rail__tick {
    position: absolute;
    left: -1px;
    top: 50%;
    width: 9px;
    height: 1px;
    background: var(--line-700);
    transform: translateY(-50%);
    transition: width .22s var(--ease), background-color .22s var(--ease);
  }

  .page-products .rail__link:hover { color: var(--paper-050); }
  .page-products .rail__link:hover .rail__tick { background: var(--cyan-400); width: 13px; }

  .page-products .rail__link[aria-current="true"] { color: var(--cyan-400); }
  .page-products .rail__link[aria-current="true"] .rail__tick {
    background: var(--cyan-400);
    width: 19px;
  }

  .page-products__paths {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-products__zone {
    grid-template-columns: minmax(0, 1fr) 288px;
  }

  .page-products__split {
    grid-template-columns: minmax(0, 296px) minmax(0, 1fr);
  }
}

@media (min-width: 1100px) {
  .page-products__zone {
    grid-template-columns: minmax(0, 1fr) 320px;
  }
}

/* ---------- 移动端收尾 ---------- */
@media (max-width: 899px) {
  .page-products .rail {
    display: none;
  }

  .page-products__fact {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 600px) {
  .page-products .step {
    grid-template-columns: 30px minmax(0, 1fr);
    gap: 10px;
  }

  .page-products .fold__body {
    padding-left: 2px;
  }

  .page-products .fold__summary {
    flex-wrap: wrap;
    gap: 8px;
  }

  .page-products .fold__summary::after {
    display: none;
  }

  .page-products__hero-actions .btn {
    flex: 1 1 auto;
    justify-content: center;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-products * {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
}