.page-products {
  --pp-rail: 258px;
  --pp-cut: 15px;
  background: var(--ink);
  color: var(--cream);
}

/* ---------- 首屏 ---------- */
.page-products .prod-hero {
  position: relative;
  padding: clamp(24px, 5vw, 56px) 0 clamp(28px, 5vw, 56px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(720px 380px at 88% 6%, rgba(255, 90, 31, .17), transparent 62%),
    radial-gradient(560px 320px at 4% 96%, rgba(0, 224, 198, .1), transparent 64%),
    var(--ink);
}

.page-products .prod-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(0deg, rgba(242, 233, 220, .028) 0 1px, transparent 1px 5px);
}

.page-products .prod-hero .wrap {
  position: relative;
  z-index: 1;
}

.page-products .prod-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 4vw, 40px);
  align-items: center;
  margin-top: clamp(18px, 3vw, 30px);
}

.page-products .prod-hero__copy .h1 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(34px, 6.4vw, 66px);
  line-height: 1.06;
  letter-spacing: .01em;
  font-weight: 800;
  color: var(--cream);
}

.page-products .prod-hero__copy .lede {
  margin-top: 18px;
  max-width: 42ch;
}

.page-products .prod-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-products .prod-hero__shot {
  margin: 0;
}

.page-products .prod-hero__cap {
  display: block;
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--scan);
}

.page-products .prod-stats {
  list-style: none;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-products .prod-stats li {
  background: var(--ink-deep);
  padding: 16px 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-products .prod-stats__num {
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 700;
  line-height: 1;
  color: var(--fox);
}

.page-products .prod-stats__lbl {
  font-size: 13px;
  color: var(--body-soft);
  letter-spacing: .04em;
}

/* ---------- 主体两栏 ---------- */
.page-products .prod-main {
  padding: clamp(28px, 5vw, 62px) 0 clamp(46px, 7vw, 90px);
}

.page-products .prod-main__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 42px);
  align-items: start;
}

/* ---------- 左侧功能索引 ---------- */
.page-products .prod-rail {
  padding: 16px;
  background: var(--steel);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}

.page-products .prod-rail__kicker {
  margin: 0;
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-products .prod-rail__list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-products .prod-rail__list::-webkit-scrollbar {
  display: none;
}

.page-products .prod-rail__link {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 9px 12px;
  font-size: 14px;
  white-space: nowrap;
  text-decoration: none;
  color: var(--body-soft);
  border: 1px solid var(--line);
  border-left: 2px solid var(--line);
  transition: color .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease);
}

.page-products .prod-rail__link:hover,
.page-products .prod-rail__link:focus-visible {
  color: var(--cyan-soft);
  border-color: var(--cyan);
  background: rgba(0, 224, 198, .07);
  outline: none;
}

.page-products .prod-rail__no {
  font-size: 12px;
  color: var(--scan);
  transition: color .18s var(--ease);
}

.page-products .prod-rail__link:hover .prod-rail__no,
.page-products .prod-rail__link:focus-visible .prod-rail__no {
  color: var(--cyan);
}

.page-products .prod-rail__note {
  margin: 14px 0 0;
  padding-top: 13px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--scan);
}

/* ---------- 功能区块 ---------- */
.page-products .prod-flow {
  display: flex;
  flex-direction: column;
  gap: clamp(18px, 3vw, 28px);
  min-width: 0;
}

.page-products .prod-block {
  position: relative;
  padding: clamp(20px, 3.4vw, 34px);
  background: var(--steel);
  border: 1px solid var(--line);
  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)));
  scroll-margin-top: calc(var(--bar-h) + 22px);
  transition: background-color .2s var(--ease);
}

.page-products .prod-block:hover {
  background: var(--steel-hi);
}

.page-products .prod-block__head {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding-bottom: 15px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 20px;
}

.page-products .prod-block__no {
  flex: 0 0 auto;
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 700;
  line-height: 1;
  color: var(--fox);
}

.page-products .prod-block__head .h2 {
  margin: 0;
}

.page-products .prod-block__sub {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--scan);
}

.page-products .prod-block__intro {
  margin: 0 0 20px;
  max-width: 62ch;
}

.page-products .prod-block__body--split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  align-items: center;
}

.page-products .prod-block__shot {
  margin: 0;
  min-width: 0;
}

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

/* ---------- 折叠说明 ---------- */
.page-products .prod-block .fold {
  margin-top: 22px;
  border-top: 1px solid var(--line);
}

.page-products .prod-block .fold__trigger {
  position: relative;
  display: block;
  width: 100%;
  padding: 14px 34px 14px 0;
  background: none;
  border: 0;
  text-align: left;
  font: inherit;
  font-size: 15px;
  font-weight: 600;
  color: var(--cream);
  cursor: pointer;
  transition: color .18s var(--ease);
}

.page-products .prod-block .fold__trigger::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 4px;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
}

.page-products .prod-block .fold__trigger[aria-expanded="true"]::after {
  content: "–";
}

.page-products .prod-block .fold__trigger:hover,
.page-products .prod-block .fold__trigger:focus-visible {
  color: var(--cyan-soft);
  outline: none;
}

.page-products .prod-block .fold__panel {
  padding: 2px 0 12px;
}

.page-products .prod-block .fold__panel .prose {
  margin: 0;
}

.page-products .prod-ticks {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-products .prod-ticks li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--body-soft);
}

.page-products .prod-ticks li::before {
  content: "";
  position: absolute;
  top: .68em;
  left: 0;
  width: 8px;
  height: 1px;
  background: var(--fox);
}

.page-products .prod-ticks strong {
  color: var(--cream);
  font-weight: 600;
}

/* ---------- 订阅偏好 ---------- */
.page-products .prod-prefs {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-products .prod-prefs__item {
  position: relative;
  padding: 16px 16px 16px 18px;
  background: var(--ink-deep);
  border: 1px solid var(--line);
  border-left: 2px solid var(--fox);
  transition: border-left-color .2s var(--ease), background-color .2s var(--ease);
}

.page-products .prod-prefs__item:hover {
  border-left-color: var(--cyan);
  background: var(--ink);
}

.page-products .prod-prefs__tag {
  display: inline-block;
  margin-bottom: 8px;
  font-size: 12px;
  letter-spacing: .08em;
}

.page-products .prod-prefs__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--body-soft);
}

/* ---------- 版本与开通 ---------- */
.page-products .prod-start {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-products .prod-start__col {
  padding: 16px 0 0;
  border-top: 1px solid var(--line);
}

.page-products .prod-start__kicker {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-products .prod-start__col p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--body-soft);
}

.page-products .prod-start__col a {
  color: var(--cyan-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: border-color .18s var(--ease), color .18s var(--ease);
}

.page-products .prod-start__col a:hover,
.page-products .prod-start__col a:focus-visible {
  border-bottom-color: var(--cyan);
  outline: none;
}

.page-products .prod-callout {
  margin-top: 24px;
  padding: 20px;
  background: linear-gradient(120deg, rgba(255, 90, 31, .14), rgba(0, 224, 198, .07));
  border: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-products .prod-callout__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--cream);
}

.page-products .prod-callout__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-products .prod-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 780px) {
  .page-products .prod-hero__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
  }

  .page-products .prod-block__body--split {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    gap: 26px;
  }

  .page-products .prod-block__body--split > .prod-block__shot {
    order: 2;
  }

  .page-products .prod-block__body--split.prod-block__body--flip > .prose {
    order: 2;
  }

  .page-products .prod-start {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }

  .page-products .prod-callout {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }

  .page-products .prod-callout__text {
    max-width: 56ch;
  }

  .page-products .prod-callout__links {
    flex: 0 0 auto;
  }
}

@media (min-width: 980px) {
  .page-products .prod-main__grid {
    grid-template-columns: var(--pp-rail) minmax(0, 1fr);
  }

  .page-products .prod-rail {
    position: sticky;
    top: calc(var(--bar-h) + 18px);
  }

  .page-products .prod-rail__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
  }

  .page-products .prod-rail__link {
    white-space: normal;
    border: 1px solid transparent;
    border-left: 2px solid var(--line);
  }
}
</main>