/* ===== 服务与资料包 / offerings ===== */
.page-products {
  --prod-rail-w: 168px;
  --prod-gap: clamp(18px, 2.4vw, 40px);
  --prod-flip: 560ms;
  --prod-soft: #0C1E33;
  color: var(--paper);
  background: var(--ink);
}

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

/* ---- 面包屑 ---- */
.page-products .breadcrumb {
  padding-top: 18px;
}

.page-products .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--muted);
}

.page-products .breadcrumb-item::after {
  content: "/";
  margin-left: 8px;
  color: var(--line);
}

.page-products .breadcrumb-item:last-child::after {
  content: none;
}

.page-products .breadcrumb-item a {
  color: var(--muted);
  text-decoration: none;
}

.page-products .breadcrumb-item a:hover {
  color: var(--cyan);
}

/* ---- 首屏 ---- */
.page-products .prod-hero {
  position: relative;
  padding: clamp(26px, 4vw, 52px) 0 clamp(34px, 5vw, 64px);
}

.page-products .prod-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  opacity: 0.45;
}

.page-products .prod-hero .eyebrow {
  color: var(--cyan);
}

.page-products .prod-hero h1 {
  margin: 0 0 18px;
  max-width: 18ch;
  font-size: clamp(2rem, 5.2vw, 3.4rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.page-products .prod-hero .lede {
  max-width: 720px;
  margin: 0 0 32px;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.75;
}

.page-products .prod-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-products .prod-stat {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--prod-soft), rgba(20, 38, 62, 0.6));
}

.page-products .prod-stat-num {
  font-size: clamp(1.6rem, 3.4vw, 2.2rem);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-products .prod-stat-label {
  font-size: 14px;
  color: var(--muted);
}

/* ---- 左栏 + 主区 ---- */
.page-products .prod-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--prod-gap);
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-products .prod-rail {
  position: static;
}

.page-products .rail-annot {
  writing-mode: horizontal-tb;
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-products .rail-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-products .rail-list::-webkit-scrollbar {
  height: 4px;
}

.page-products .rail-list::-webkit-scrollbar-thumb {
  background: var(--line);
  border-radius: var(--radius-pill);
}

.page-products .rail-link {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: var(--prod-soft);
  color: var(--muted);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  scroll-snap-align: start;
  transition: color 220ms var(--ease), border-color 220ms var(--ease), background 220ms var(--ease);
}

.page-products .rail-num {
  font-size: 11px;
  color: var(--line);
}

.page-products .rail-link:hover,
.page-products .rail-link[aria-current="true"] {
  color: var(--ink);
  border-color: var(--cyan);
  background: var(--cyan);
}

.page-products .rail-link:hover .rail-num,
.page-products .rail-link[aria-current="true"] .rail-num {
  color: rgba(7, 19, 36, 0.7);
}

/* ---- 章节 ---- */
.page-products .prod-flow {
  display: flex;
  flex-direction: column;
  gap: clamp(48px, 7vw, 96px);
  min-width: 0;
}

.page-products .prod-sec {
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-products .prod-sec .section-head h2 {
  margin: 8px 0 14px;
  font-size: clamp(1.5rem, 3.2vw, 2.2rem);
  line-height: 1.18;
  letter-spacing: -0.02em;
}

.page-products .prod-sec .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-products .prod-sec .lede {
  max-width: 720px;
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.75;
}

.page-products .text-muted {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.page-products a {
  color: var(--cyan-soft);
  text-decoration: underline;
  text-decoration-color: rgba(34, 230, 211, 0.35);
  text-underline-offset: 3px;
}

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

/* ---- 网格 ---- */
.page-products .grid-12 {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--prod-gap);
}

.page-products .prod-row--flip > .col-wide {
  order: 2;
}

.page-products .prod-row--flip > .col-narrow {
  order: 1;
}

/* ---- 指标板 ---- */
.page-products .metric-board {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}

.page-products .metric {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--prod-soft);
  transition: transform 260ms var(--ease), border-color 260ms var(--ease);
}

.page-products .metric:hover {
  transform: translateY(-4px);
  border-color: var(--cyan);
}

.page-products .metric-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--cyan);
  line-height: 1.1;
}

.page-products .metric-label {
  font-size: 13px;
  color: var(--muted);
}

.page-products .metric-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
}

.page-products .metric-tags li {
  padding: 7px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: rgba(20, 38, 62, 0.7);
  font-size: 13px;
  color: var(--paper);
}

/* ---- 图文容器 ---- */
.page-products .media-frame {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--prod-soft);
}

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

.page-products .media-caption {
  display: block;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

/* ---- 特性列表 ---- */
.page-products .feature-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-products .feature-list li {
  padding: 18px 22px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  border-radius: var(--radius-md);
  background: var(--prod-soft);
}

.page-products .feature-list h3 {
  margin: 0 0 6px;
  font-size: 1.05rem;
  color: var(--paper);
}

.page-products .feature-list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---- 数据面板事实 ---- */
.page-products .board-facts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
}

.page-products .board-facts li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: linear-gradient(160deg, rgba(34, 230, 211, 0.08), transparent 62%), var(--prod-soft);
}

.page-products .board-num {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-products .board-label {
  font-size: 13px;
  color: var(--muted);
}

.page-products .prod-banner {
  margin-top: 8px;
}

/* ---- 价格翻页卡 ---- */
.page-products .flip-deck {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-bottom: 26px;
}

.page-products .flip-card {
  perspective: 1400px;
  min-height: 300px;
  outline: none;
}

.page-products .flip-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  min-height: 300px;
  transform-style: preserve-3d;
  transition: transform var(--prod-flip) var(--ease);
}

.page-products .flip-card:hover .flip-card-inner,
.page-products .flip-card:focus-visible .flip-card-inner,
.page-products .flip-card:focus .flip-card-inner {
  transform: rotateY(180deg);
}

.page-products .flip-card:focus-visible {
  box-shadow: 0 0 0 2px var(--cyan);
  border-radius: var(--radius-xl);
}

.page-products .flip-face {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 10px;
  padding: 28px 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  overflow: hidden;
}

.page-products .flip-front {
  background: linear-gradient(150deg, var(--panel), var(--prod-soft) 70%);
  border-color: var(--cyan);
}

.page-products .flip-card--alt .flip-front {
  border-color: var(--orange);
  background: linear-gradient(150deg, var(--panel), rgba(255, 122, 41, 0.12) 78%);
}

.page-products .flip-back {
  transform: rotateY(180deg);
  background: linear-gradient(150deg, var(--prod-soft), var(--panel));
  border-color: var(--line);
}

.page-products .flip-card--alt .flip-back {
  border-color: var(--orange);
}

.page-products .flip-front .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.page-products .flip-price {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin: 0;
  font-size: clamp(2.6rem, 8vw, 4rem);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-products .flip-card--alt .flip-price {
  color: var(--orange);
}

.page-products .flip-unit {
  font-size: 1rem;
  font-family: var(--font-body);
  color: var(--muted);
}

.page-products .flip-sub {
  margin: 0;
  font-size: 15px;
  color: var(--paper);
}

.page-products .flip-hint {
  margin: 4px 0 0;
  font-size: 12px;
  color: var(--muted);
}

.page-products .flip-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-products .flip-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--paper);
}

.page-products .flip-list li::before {
  content: "";
  position: absolute;
  top: 9px;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
}

.page-products .flip-card--alt .flip-list li::before {
  background: var(--orange);
}

/* ---- 覆盖范围条 ---- */
.page-products .scale-bar {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 28px;
}

.page-products .scale-seg {
  display: flex;
  align-items: center;
  padding: 12px 18px;
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.page-products .scale-seg--half {
  width: 62%;
  min-width: 180px;
  background: rgba(34, 230, 211, 0.16);
  border: 1px solid var(--cyan);
  color: var(--cyan-soft);
}

.page-products .scale-seg--full {
  width: 100%;
  background: rgba(255, 122, 41, 0.14);
  border: 1px solid var(--orange);
  color: var(--sand);
}

/* ---- 折叠面板 ---- */
.page-products .fold {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--prod-soft);
  margin-bottom: 12px;
  overflow: hidden;
}

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

.page-products .fold-head {
  margin: 0;
  font-size: 1rem;
}

.page-products .fold-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 16px 20px;
  border: 0;
  background: transparent;
  color: var(--paper);
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
}

.page-products .fold-btn:hover {
  color: var(--cyan);
}

.page-products .fold-mark {
  position: relative;
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
}

.page-products .fold-mark::before,
.page-products .fold-mark::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform 260ms var(--ease), opacity 260ms var(--ease);
}

.page-products .fold-mark::before {
  top: 6px;
  left: 0;
  width: 14px;
  height: 2px;
}

.page-products .fold-mark::after {
  top: 0;
  left: 6px;
  width: 2px;
  height: 14px;
}

.page-products .fold[data-open] .fold-mark::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-products .fold-body {
  padding: 0 20px 20px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

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

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

/* ---- 数据表 ---- */
.page-products .data-table-wrap {
  max-height: 440px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--ink);
}

.page-products .data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
}

.page-products .data-table caption {
  text-align: left;
}

.page-products .data-table th,
.page-products .data-table td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.page-products .data-table thead th {
  position: sticky;
  top: 0;
  z-index: 2;
  background: var(--panel);
  color: var(--cyan-soft);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.page-products .data-table tbody th {
  color: var(--paper);
  font-weight: 600;
  white-space: nowrap;
}

.page-products .data-table tbody td {
  color: var(--muted);
}

.page-products .data-table tbody tr:nth-child(odd) {
  background: rgba(20, 38, 62, 0.45);
}

.page-products .data-table tbody tr:hover {
  background: rgba(34, 230, 211, 0.07);
}

.page-products .data-table .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
  text-align: right;
  white-space: nowrap;
}

.page-products .prod-plan-wrap {
  max-height: none;
  margin-bottom: 26px;
}

/* ---- 差异对照 ---- */
.page-products .diff-pair {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-products .diff-card {
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-top: 3px solid var(--cyan);
  border-radius: var(--radius-md);
  background: var(--prod-soft);
  transition: transform 260ms var(--ease), border-color 260ms var(--ease);
}

.page-products .diff-card--alt {
  border-top-color: var(--orange);
}

.page-products .diff-card:hover {
  transform: translateY(-4px);
}

.page-products .diff-card .eyebrow {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--muted);
}

.page-products .diff-card h3 {
  margin: 0 0 8px;
  font-size: 1.15rem;
  color: var(--paper);
}

.page-products .diff-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---- 步骤 ---- */
.page-products .step-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: 0 0 28px;
  padding: 0;
  list-style: none;
  counter-reset: prod-step;
}

.page-products .step {
  position: relative;
  padding: 22px 24px 22px 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: linear-gradient(120deg, rgba(34, 230, 211, 0.07), transparent 58%), var(--prod-soft);
}

.page-products .step-num {
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--orange);
}

.page-products .step h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
  color: var(--paper);
}

.page-products .step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---- 按钮 ---- */
.page-products .btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-products .btn {
  display: inline-flex;
  align-items: center;
  padding: 13px 26px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: transform 220ms var(--ease), background 220ms var(--ease), color 220ms var(--ease), border-color 220ms var(--ease);
}

.page-products .btn:hover {
  transform: translateY(-2px);
}

.page-products .btn--primary {
  background: var(--orange);
  color: var(--ink);
  border: 1px solid var(--orange);
}

.page-products .btn--primary:hover {
  background: var(--sand);
  color: var(--ink);
}

.page-products .btn--ghost {
  border: 1px solid var(--cyan);
  color: var(--cyan);
  background: transparent;
}

.page-products .btn--ghost:hover {
  background: rgba(34, 230, 211, 0.12);
  color: var(--cyan-soft);
}

/* ---- 用途 ---- */
.page-products .use-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-bottom: 24px;
}

.page-products .use-card {
  padding: 24px 24px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--prod-soft);
  transition: transform 260ms var(--ease), border-color 260ms var(--ease);
}

.page-products .use-card:hover {
  transform: translateY(-4px);
  border-color: var(--cyan);
}

.page-products .use-card h3 {
  margin: 0 0 10px;
  font-size: 1.1rem;
  color: var(--paper);
}

.page-products .use-card p {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-products .use-pick {
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 13px;
  color: var(--muted);
}

.page-products .use-pick strong {
  color: var(--cyan);
  font-weight: 600;
}

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

/* ---- 桌面端 ---- */
@media (min-width: 900px) {
  .page-products .prod-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-products .prod-shell {
    grid-template-columns: var(--prod-rail-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-products .prod-rail {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    padding-top: 6px;
  }

  .page-products .rail-annot {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    margin: 0 auto 14px 0;
    padding-left: 4px;
  }

  .page-products .rail-list {
    flex-direction: column;
    gap: 6px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-products .rail-link {
    border-radius: var(--radius-md);
    width: 100%;
  }

  .page-products .grid-12 {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .page-products .col-wide {
    grid-column: span 7;
  }

  .page-products .col-narrow {
    grid-column: span 5;
  }

  .page-products .prod-row--flip > .col-wide {
    order: 0;
  }

  .page-products .prod-row--flip > .col-narrow {
    order: 0;
  }

  .page-products .flip-deck {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }

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

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

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

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

@media (min-width: 1200px) {
  .page-products .step-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---- 触屏与窄屏：翻页卡改为两面平铺 ---- */
@media (hover: none), (max-width: 899px) {
  .page-products .flip-card {
    perspective: none;
    min-height: 0;
  }

  .page-products .flip-card-inner {
    min-height: 0;
    transform-style: flat;
    transform: none !important;
  }

  .page-products .flip-face {
    position: static;
    transform: none;
    backface-visibility: visible;
    -webkit-backface-visibility: visible;
    border-radius: var(--radius-lg);
  }

  .page-products .flip-deck {
    gap: 22px;
  }

  .page-products .flip-hint {
    display: none;
  }

  .page-products .scale-seg--half {
    width: 100%;
    min-width: 0;
  }
}

/* ---- 降低动效 ---- */
@media (prefers-reduced-motion: reduce) {
  .page-products .flip-card-inner,
  .page-products .metric,
  .page-products .diff-card,
  .page-products .use-card,
  .page-products .btn,
  .page-products .fold-mark::before,
  .page-products .fold-mark::after {
    transition: none;
  }

  .page-products .btn:hover,
  .page-products .metric:hover,
  .page-products .diff-card:hover,
  .page-products .use-card:hover {
    transform: none;
  }
}