/* ===== 应用中心 /apps/ ===== */

.page-products .band--ink {
  padding-block: clamp(40px, 6vw, 88px);
  background-image:
    linear-gradient(rgba(0, 229, 204, .06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 204, .06) 1px, transparent 1px);
  background-size: 48px 48px;
}

/* —— 首屏 —— */
.page-products .prod-hero {
  display: grid;
  gap: 18px;
  padding: clamp(20px, 3vw, 36px) 0 clamp(30px, 4.4vw, 60px);
}

.page-products .prod-hero__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--signal);
}

.page-products .prod-hero__title {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(32px, 6.2vw, 68px);
  line-height: 1.08;
  letter-spacing: -.01em;
  color: var(--ink);
  max-width: 13em;
}

.page-products .prod-hero__lede {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(16px, 1.5vw, 19px);
  line-height: 1.85;
  color: var(--slate);
  max-width: 44em;
}

.page-products .prod-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 34px;
  margin: 6px 0 0;
  padding: 18px 0 0;
  border-top: var(--rule) solid var(--ink);
  list-style: none;
}

.page-products .prod-fact {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 14px;
  color: var(--slate);
}

.page-products .prod-fact__num {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--signal);
}

/* —— 章节通用头 —— */
.page-products .section-head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(24px, 3.2vw, 42px);
}

.page-products .chapter-no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--signal);
}

.page-products .section-head__title {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(25px, 3.3vw, 42px);
  line-height: 1.16;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-products .section-head__meta {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--slate);
  max-width: 52ch;
}

/* —— 入口总表 —— */
.page-products .prod-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 4px;
}

.page-products .prod-table th {
  text-align: left;
  padding: 0 16px 14px 0;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .1em;
  color: var(--cyan);
  border-bottom: 2px solid rgba(0, 229, 204, .35);
  white-space: nowrap;
}

.page-products .prod-table td {
  padding: 18px 16px 18px 0;
  font-size: 15px;
  line-height: 1.65;
  color: var(--mist);
  border-bottom: 1px solid rgba(216, 220, 227, .16);
  vertical-align: top;
}

.page-products .prod-table td:first-child {
  font-size: 16px;
  font-weight: 800;
  color: var(--paper);
  white-space: nowrap;
}

.page-products .prod-table tbody tr {
  transition: background-color .2s var(--ease);
}

.page-products .prod-table tbody tr:hover {
  background-color: rgba(0, 229, 204, .06);
}

/* —— 主体舞台：左索引 + 右内容 —— */
.page-products .prod-stage {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 40px);
  padding-block: clamp(32px, 5vw, 72px);
}

.page-products .prod-index__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--slate);
}

.page-products .prod-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
}

.page-products .prod-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  border: 2px solid var(--mist);
  color: var(--slate);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-products .prod-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--signal);
}

.page-products .prod-index__link:hover,
.page-products .prod-index__link.is-active {
  border-color: var(--signal);
  background-color: var(--paper-2);
  color: var(--ink);
}

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

/* —— 内容块 —— */
.page-products .prod-block {
  padding: clamp(36px, 5vw, 76px) 0;
  border-top: var(--rule) solid var(--ink);
}

.page-products .prod-body > .prod-block:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-products .prod-block--ink {
  border-top: 0;
  padding: clamp(28px, 4vw, 56px) 0;
}

.page-products .prod-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3vw, 44px);
  align-items: start;
}

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

.page-products .prod-split__text p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--slate);
}

.page-products .prod-split__text .lede {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 18px;
  line-height: 1.8;
  color: var(--ink);
  margin-bottom: 18px;
}

.page-products .prod-split__text a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--signal);
  text-underline-offset: 3px;
}

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

.page-products .prod-figure .figure__frame {
  border: var(--rule) solid var(--ink);
  box-shadow: 8px 8px 0 rgba(27, 42, 74, .16);
  overflow: hidden;
  background-color: var(--paper-2);
}

.page-products .prod-figure .figure__media {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-products .prod-figure .figure__cap {
  margin-top: 10px;
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--slate);
}

/* —— 折叠面板 —— */
.page-products .prod-fold {
  margin: 20px 0;
  border: var(--rule) solid var(--ink);
  background-color: var(--paper-2);
  transition: border-color .25s var(--ease);
}

.page-products .prod-fold[open] {
  border-color: var(--cyan);
}

.page-products .prod-fold .fold__sum {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

.page-products .prod-fold .fold__sum::-webkit-details-marker {
  display: none;
}

.page-products .prod-fold .fold__sum::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--signal);
}

.page-products .prod-fold[open] .fold__sum::after {
  content: "–";
}

.page-products .prod-fold .fold__body {
  padding: 0 18px 16px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--slate);
}

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

.page-products .prod-list {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-products .prod-list li {
  position: relative;
  padding-left: 20px;
}

.page-products .prod-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 9px;
  height: 2px;
  background-color: var(--signal);
}

.page-products .prod-note {
  margin: 20px 0 0;
  padding-left: 14px;
  border-left: 3px solid var(--cyan);
  font-size: 15px;
  line-height: 1.75;
  color: var(--slate);
}

.page-products .prod-note a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--signal);
  text-underline-offset: 3px;
}

/* —— 权益面板 —— */
.page-products .prod-panel {
  background-color: var(--ink);
  color: var(--paper);
  border: var(--rule) solid var(--ink);
  box-shadow: 12px 12px 0 var(--signal);
  padding: clamp(24px, 3.4vw, 48px);
}

.page-products .prod-panel .section-head__title {
  color: var(--paper);
}

.page-products .prod-panel .section-head__meta {
  color: var(--mist);
}

.page-products .prod-panel .prod-figure .figure__frame {
  border-color: var(--paper);
  box-shadow: 8px 8px 0 rgba(0, 229, 204, .4);
  background-color: var(--ink-deep);
}

.page-products .prod-panel .prod-figure .figure__cap {
  color: var(--mist);
}

.page-products .prod-tiers {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  align-items: end;
  margin-bottom: clamp(26px, 3.4vw, 44px);
}

.page-products .prod-tier {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 8px;
  padding: 18px 16px;
  background-color: var(--paper);
  border: var(--rule) solid var(--ink-deep);
  box-shadow: 6px 6px 0 rgba(0, 229, 204, .55);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}

.page-products .prod-tier:hover {
  transform: translateY(-6px);
  box-shadow: 6px 8px 0 var(--signal);
}

.page-products .prod-tier--top {
  background-color: var(--signal);
  box-shadow: 6px 6px 0 var(--cyan);
}

.page-products .prod-tier__step {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--slate);
}

.page-products .prod-tier__name {
  margin: 0;
  font-size: 17px;
  font-weight: 800;
  color: var(--ink);
}

.page-products .prod-tier__days {
  display: flex;
  align-items: baseline;
  gap: 5px;
  margin: 0;
  font-size: 13px;
  font-weight: 700;
  color: var(--slate);
}

.page-products .prod-tier__days .mono {
  font-family: var(--font-mono);
  font-size: 38px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--signal);
}

.page-products .prod-tier__body {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate);
}

.page-products .prod-tier__fit {
  margin: 0;
  padding-top: 9px;
  border-top: 1px dashed rgba(90, 100, 120, .5);
  font-size: 12px;
  letter-spacing: .03em;
  color: var(--slate);
}

.page-products .prod-tier--top .prod-tier__step,
.page-products .prod-tier--top .prod-tier__name,
.page-products .prod-tier--top .prod-tier__days,
.page-products .prod-tier--top .prod-tier__body,
.page-products .prod-tier--top .prod-tier__fit {
  color: var(--ink-deep);
}

.page-products .prod-tier--top .prod-tier__days .mono {
  color: var(--ink-deep);
}

.page-products .prod-tier--top .prod-tier__fit {
  border-top-color: rgba(18, 32, 58, .4);
}

/* —— 兑换三步 —— */
.page-products .prod-steps {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  margin: 0 0 clamp(26px, 3.4vw, 46px);
  padding: 0;
  list-style: none;
}

.page-products .prod-step {
  position: relative;
  padding: 22px 20px;
  background-color: var(--paper-2);
  border: var(--rule) solid var(--ink);
  box-shadow: 6px 6px 0 rgba(27, 42, 74, .18);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
}

.page-products .prod-step:hover {
  transform: translateY(-4px);
  border-color: var(--cyan);
  box-shadow: 6px 6px 0 var(--cyan);
}

.page-products .prod-step__num {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: .06em;
  color: var(--signal);
}

.page-products .prod-step__title {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 800;
  color: var(--ink);
}

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

/* —— 订阅与同步 —— */
.page-products .prod-duo {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  margin-bottom: clamp(26px, 3.4vw, 44px);
}

.page-products .prod-duo__item {
  padding: 24px 22px;
  background-color: var(--paper-2);
  border: var(--rule) solid var(--ink);
  border-left-width: 8px;
  border-left-color: var(--cyan);
}

.page-products .prod-duo__item:nth-child(2) {
  border-left-color: var(--teal);
}

.page-products .prod-duo__title {
  margin: 0 0 12px;
  font-size: 19px;
  font-weight: 800;
  color: var(--ink);
}

.page-products .prod-duo__item p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--slate);
}

.page-products .prod-duo__item p:last-child {
  margin-bottom: 0;
}

/* —— 选择建议 —— */
.page-products .prod-picks {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.page-products .prod-pick {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 24px 22px;
  background-color: var(--ink-deep);
  border: var(--rule) solid var(--ink);
  box-shadow: 8px 8px 0 var(--signal);
}

.page-products .prod-pick--b {
  box-shadow: 8px 8px 0 var(--cyan);
}

.page-products .prod-pick--c {
  box-shadow: 8px 8px 0 var(--wine);
}

.page-products .prod-pick__who {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-products .prod-pick__title {
  margin: 0;
  font-size: 18px;
  font-weight: 800;
  color: var(--paper);
}

.page-products .prod-pick__body {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--paper-2);
}

.page-products .prod-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: clamp(26px, 3.4vw, 44px);
  padding: 22px 24px;
  background-color: var(--paper-2);
  border: var(--rule) solid var(--ink);
}

.page-products .prod-cta__text {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
}

/* —— 响应式 —— */
@media (max-width: 760px) {
  .page-products .prod-table,
  .page-products .prod-table tbody,
  .page-products .prod-table tr,
  .page-products .prod-table td {
    display: block;
    width: 100%;
  }

  .page-products .prod-table thead {
    display: none;
  }

  .page-products .prod-table tr {
    margin-bottom: 16px;
    padding: 4px 0 12px;
    background-color: rgba(18, 32, 58, .88);
    border: 2px solid rgba(0, 229, 204, .4);
  }

  .page-products .prod-table td {
    padding: 10px 16px;
    border-bottom: 0;
  }

  .page-products .prod-table td::before {
    content: attr(data-label);
    display: block;
    margin-bottom: 4px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .12em;
    color: var(--cyan);
  }

  .page-products .prod-table td:first-child {
    padding-top: 16px;
    padding-bottom: 12px;
    white-space: normal;
    border-bottom: 1px solid rgba(216, 220, 227, .2);
  }

  .page-products .prod-figure--tall .figure__frame {
    max-width: 300px;
    margin-inline: auto;
  }
}

@media (min-width: 780px) {
  .page-products .prod-tiers {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
  }

  .page-products .prod-tiers > .prod-tier:nth-child(1) { min-height: 182px; }
  .page-products .prod-tiers > .prod-tier:nth-child(2) { min-height: 236px; }
  .page-products .prod-tiers > .prod-tier:nth-child(3) { min-height: 290px; }
  .page-products .prod-tiers > .prod-tier:nth-child(4) { min-height: 344px; }
}

@media (min-width: 820px) {
  .page-products .prod-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 26px;
  }

  .page-products .prod-step + .prod-step::before {
    content: "";
    position: absolute;
    left: -28px;
    top: 44px;
    width: 28px;
    height: 2px;
    background-color: var(--cyan);
  }
}

@media (min-width: 880px) {
  .page-products .prod-split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  }

  .page-products .prod-split--flip {
    grid-template-columns: minmax(0, .68fr) minmax(0, 1.32fr);
  }

  .page-products .prod-split--flip > .prod-figure {
    order: -1;
  }
}

@media (min-width: 900px) {
  .page-products .prod-duo {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px;
  }

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

@media (min-width: 1000px) {
  .page-products .prod-stage {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 72px);
  }

  .page-products .prod-index {
    position: sticky;
    top: 132px;
    align-self: start;
  }

  .page-products .prod-index__list {
    flex-direction: column;
    gap: 4px;
    padding-bottom: 0;
    overflow: visible;
  }

  .page-products .prod-index__link {
    display: flex;
    gap: 10px;
    padding: 9px 12px;
    border: 0;
    border-left: 3px solid transparent;
    font-size: 14px;
    white-space: normal;
  }

  .page-products .prod-index__link:hover,
  .page-products .prod-index__link.is-active {
    border-left-color: var(--signal);
    background-color: var(--paper-2);
  }
}