/* ==========================================================
   page-products — PC端与多链管理
   所有选择器限定在 .page-products 作用域内
   ========================================================== */

.page-products {
  --prod-gap: clamp(40px, 7vw, 92px);
  --prod-rail-w: 236px;
  display: block;
  background: var(--ink-900);
  color: var(--text-hi);
  font-family: var(--font-body);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-products .prod-hero {
  position: relative;
  padding-block: clamp(78px, 12vw, 148px) clamp(44px, 6vw, 76px);
  border-bottom: 1px solid var(--hairline);
  background:
    radial-gradient(120% 88% at 6% 0%, var(--teal-a08) 0%, rgba(46, 211, 166, 0) 58%),
    radial-gradient(90% 70% at 96% 12%, var(--amber-a08) 0%, rgba(255, 180, 77, 0) 62%),
    linear-gradient(180deg, var(--ink-950) 0%, var(--ink-900) 100%);
}

.page-products .prod-hero .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--text-mid);
  margin-bottom: clamp(28px, 5vw, 52px);
}

.page-products .prod-hero .breadcrumb a {
  color: var(--text-mid);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-products .prod-hero .breadcrumb a:hover,
.page-products .prod-hero .breadcrumb a:focus-visible {
  color: var(--teal);
  border-bottom-color: var(--teal);
}

.page-products .exhibit-label {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-mid);
  font-family: var(--font-mono);
}

.page-products .exhibit-label__no {
  display: inline-block;
  padding: 2px 7px;
  border: 1px solid var(--teal-a32);
  color: var(--teal);
  border-radius: 2px;
}

.page-products .exhibit-label__dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--hairline);
}

.page-products .prod-hero .display {
  margin: 0 0 22px;
  max-width: 15em;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(34px, 6.2vw, 84px);
  line-height: 1.04;
  letter-spacing: -0.025em;
  color: var(--text-hi);
}

.page-products .prod-hero .lede {
  margin: 0;
  max-width: 34em;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.8;
  color: var(--text-mid);
}

.page-products .prod-hero__facts {
  list-style: none;
  margin: clamp(32px, 5vw, 56px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
  border-radius: 3px;
  overflow: hidden;
}

.page-products .prod-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  background: var(--ink-950);
}

.page-products .prod-hero__k {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-mid);
  font-family: var(--font-mono);
}

.page-products .prod-hero__v {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(18px, 2.2vw, 24px);
  letter-spacing: -0.01em;
  color: var(--text-hi);
}

/* ---------- 主体两栏 ---------- */
.page-products .prod-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  padding-block: var(--prod-gap);
}

/* ---------- 左侧索引 ---------- */
.page-products .anchor-rail {
  border-top: 1px solid var(--hairline);
  padding-top: 16px;
}

.page-products .anchor-rail__label {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-mid);
  font-family: var(--font-mono);
}

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

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

.page-products .anchor-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  padding: 9px 12px;
  border: 1px solid var(--hairline);
  border-radius: 2px;
  color: var(--text-mid);
  text-decoration: none;
  font-size: 13px;
  white-space: nowrap;
  transition: color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

.page-products .anchor-rail__link:hover,
.page-products .anchor-rail__link:focus-visible {
  color: var(--text-hi);
  border-color: var(--teal-a56);
  background: var(--teal-a08);
  outline: none;
}

.page-products .anchor-rail__link:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

.page-products .anchor-rail__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--teal);
}

.page-products .anchor-rail__note {
  margin: 14px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--text-mid);
}

/* ---------- 步骤卡 ---------- */
.page-products .prod-flow {
  min-width: 0;
}

.page-products .prod-step {
  border-top: 1px solid var(--hairline);
  padding-top: clamp(22px, 3.4vw, 38px);
  margin-bottom: var(--prod-gap);
  scroll-margin-top: calc(var(--nav-h) + 28px);
}

.page-products .prod-step:last-of-type {
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-products .prod-step__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px 40px;
}

.page-products .prod-step__no {
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(56px, 13vw, 116px);
  line-height: 0.8;
  letter-spacing: -0.05em;
  font-variant-numeric: tabular-nums;
  color: var(--ink-700);
  -webkit-text-stroke: 1px var(--hairline);
  margin-bottom: 6px;
  user-select: none;
}

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

.page-products .prod-step__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 12px;
}

.page-products .prod-step__status {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--text-mid);
}

.page-products .tag {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 2px;
  font-size: 11px;
  letter-spacing: 0.12em;
  font-family: var(--font-mono);
  border: 1px solid var(--hairline);
  color: var(--text-mid);
}

.page-products .tag--current {
  border-color: var(--teal-a32);
  color: var(--teal);
  background: var(--teal-a08);
}

.page-products .tag--amber {
  border-color: var(--amber-a28);
  color: var(--amber);
  background: var(--amber-a08);
}

.page-products .tag--legacy {
  border-color: var(--violet-a50);
  color: var(--violet-legacy);
  background: var(--violet-a28);
}

.page-products .prod-step__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(23px, 3.3vw, 38px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--text-hi);
  max-width: 18em;
}

.page-products .prose {
  margin: 0 0 18px;
  max-width: 38em;
  font-size: 16px;
  line-height: 1.78;
  color: var(--text-mid);
}

.page-products .prod-note {
  margin: 16px 0;
  max-width: 38em;
  padding: 12px 14px;
  border-left: 2px solid var(--amber-a48);
  background: var(--amber-a08);
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-hi);
}

.page-products .prod-inline-link {
  margin: 20px 0 0;
}

.page-products .prod-mono-line {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.9;
  color: var(--text-mid);
}

.page-products .mono {
  font-family: var(--font-mono);
  font-size: 0.94em;
  padding: 2px 7px;
  border-radius: 2px;
  background: var(--paper-a10);
  color: var(--text-hi);
  word-break: break-all;
}

/* ---------- 图片 ---------- */
.page-products .figure {
  margin: 0 0 24px;
}

.page-products .figure--wide,
.page-products .figure--portrait {
  max-width: 100%;
}

.page-products .figure__frame {
  position: relative;
  border: 1px solid var(--hairline);
  border-radius: 3px;
  background: var(--ink-800);
  overflow: hidden;
  box-shadow: var(--shadow-hover);
}

.page-products .figure__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, var(--paper-a06) 1px, transparent 1px),
    linear-gradient(to bottom, var(--paper-a06) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: 0.55;
}

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

.page-products .figure--skew .figure__frame {
  transform: rotate(-1.4deg);
  border-color: var(--hairline);
}

.page-products .figure__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  line-height: 1.7;
  color: var(--text-mid);
}

/* ---------- 勾选清单 ---------- */
.page-products .check-list {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  border-top: 1px solid var(--hairline);
}

.page-products .check-list--tight {
  margin: 12px 0 0;
  border-top: 1px solid var(--hairline);
}

.page-products .check-item {
  position: relative;
  border-bottom: 1px solid var(--hairline);
}

.page-products .check-item__input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: 0;
  padding: 0;
  opacity: 0;
  pointer-events: none;
}

.page-products .check-item__label {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  min-height: 44px;
  padding: 12px 6px;
  cursor: pointer;
  font-size: 15px;
  line-height: 1.65;
  color: var(--text-mid);
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-products .check-item__label:hover {
  color: var(--text-hi);
  background: var(--paper-a06);
}

.page-products .check-item__box {
  position: relative;
  flex: 0 0 16px;
  width: 16px;
  height: 16px;
  margin-top: 5px;
  border: 1px solid var(--text-mid);
  border-radius: 2px;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-products .check-item__box::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 1px;
  width: 5px;
  height: 9px;
  border-right: 2px solid var(--ink-950);
  border-bottom: 2px solid var(--ink-950);
  transform: rotate(45deg) scale(0);
  transition: transform var(--dur) var(--ease);
}

.page-products .check-item__input:focus-visible + .check-item__label .check-item__box {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

.page-products .check-item__input:checked + .check-item__label {
  color: var(--text-hi);
}

.page-products .check-item__input:checked + .check-item__label .check-item__box {
  background: var(--teal);
  border-color: var(--teal);
}

.page-products .check-item__input:checked + .check-item__label .check-item__box::after {
  transform: rotate(45deg) scale(1);
}

.page-products .check-item__text {
  min-width: 0;
}

/* ---------- 新旧版切换 ---------- */
.page-products .ver-switch {
  position: relative;
  margin: 22px 0 0;
}

.page-products .ver-switch__input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-products .ver-switch__tabs {
  display: inline-flex;
  gap: 3px;
  padding: 3px;
  margin-bottom: 20px;
  border: 1px solid var(--hairline);
  border-radius: 3px;
  background: var(--ink-800);
}

.page-products .ver-switch__tab {
  padding: 9px 16px;
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--text-mid);
  border-radius: 2px;
  cursor: pointer;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-products .ver-switch__tab:hover {
  color: var(--text-hi);
}

.page-products .ver-switch__input:focus-visible ~ .ver-switch__tabs {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

.page-products .ver-switch__input--new:checked ~ .ver-switch__tabs .ver-switch__tab--new,
.page-products .ver-switch__input--old:checked ~ .ver-switch__tabs .ver-switch__tab--old {
  background: var(--teal-a16);
  color: var(--teal);
}

.page-products .ver-switch__pane {
  display: none;
}

.page-products .ver-switch__input--new:checked ~ .ver-switch__pane--new {
  display: block;
}

.page-products .ver-switch__input--old:checked ~ .ver-switch__pane--old {
  display: block;
}

.page-products .ver-switch__pane--old {
  padding-left: 16px;
  border-left: 2px solid var(--violet-a50);
  filter: saturate(0.5);
}

/* ---------- 易混淆口径 ---------- */
.page-products .pitfall-list {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  border-top: 1px solid var(--hairline);
}

.page-products .pitfall-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 14px 6px;
  border-bottom: 1px solid var(--hairline);
  transition: background-color var(--dur) var(--ease);
}

.page-products .pitfall-item:hover {
  background: var(--paper-a06);
}

.page-products .pitfall-item__k {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--teal);
}

.page-products .pitfall-item__v {
  font-size: 15px;
  line-height: 1.72;
  color: var(--text-mid);
}

/* ---------- 地址核对三列 ---------- */
.page-products .audit {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: 0 0 8px;
}

.page-products .audit__col {
  padding: 18px 16px 14px;
  border: 1px solid var(--hairline);
  border-radius: 3px;
  background: var(--ink-800);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-products .audit__col:hover {
  border-color: var(--teal-a32);
  box-shadow: var(--shadow-hover);
}

.page-products .audit__head {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: 21px;
  letter-spacing: -0.01em;
  color: var(--text-hi);
}

.page-products .audit__head::before {
  content: "";
  display: block;
  width: 22px;
  height: 1px;
  margin-bottom: 10px;
  background: var(--amber);
}

.page-products .audit__std {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--text-mid);
}

/* ---------- 折叠问答 ---------- */
.page-products .faq {
  border-top: 1px solid var(--hairline);
  margin-top: 8px;
}

.page-products .faq__item {
  border-bottom: 1px solid var(--hairline);
}

.page-products .faq__trigger {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 16px 6px;
  cursor: pointer;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-hi);
  list-style: none;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

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

.page-products .faq__trigger:hover {
  color: var(--amber);
  background: var(--paper-a06);
}

.page-products .faq__trigger:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

.page-products .faq__mark {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-products .faq__panel {
  padding: 0 6px 20px 32px;
}

.page-products .faq__panel p {
  margin: 0 0 10px;
  max-width: 38em;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--text-mid);
}

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

/* ---------- 收尾 ---------- */
.page-products .prod-cta {
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  padding: clamp(28px, 4vw, 48px) 0;
}

.page-products .prod-cta__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(24px, 3.6vw, 42px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--text-hi);
}

.page-products .prod-cta__text {
  margin: 0 0 22px;
  max-width: 36em;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--text-mid);
}

.page-products .prod-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-products .btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 18px;
  border-radius: 2px;
  border: 1px solid var(--hairline);
  font-size: 14px;
  letter-spacing: 0.02em;
  text-decoration: none;
  color: var(--text-hi);
  background: transparent;
  transition: color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

.page-products .btn--primary {
  border-color: var(--teal-a56);
  background: var(--teal-a16);
  color: var(--teal);
}

.page-products .btn--primary:hover,
.page-products .btn--primary:focus-visible {
  background: var(--teal-a32);
  border-color: var(--teal);
  color: var(--text-hi);
}

.page-products .btn--ghost:hover,
.page-products .btn--ghost:focus-visible {
  border-color: var(--teal-a56);
  color: var(--teal);
  background: var(--teal-a08);
}

.page-products .btn--legacy {
  border-color: var(--violet-a50);
  color: var(--violet-legacy);
  filter: saturate(0.7);
}

.page-products .btn--legacy:hover,
.page-products .btn--legacy:focus-visible {
  border-color: var(--violet-legacy);
  color: var(--text-hi);
}

.page-products .btn:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

/* ==========================================================
   响应式
   ========================================================== */

@media (min-width: 560px) {
  .page-products .prod-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-products .pitfall-item {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 18px;
    align-items: baseline;
  }
}

@media (min-width: 760px) {
  .page-products .prod-step__grid {
    grid-template-columns: 136px minmax(0, 1fr);
  }

  .page-products .prod-step__no {
    margin-bottom: 0;
    margin-top: -10px;
  }
}

@media (min-width: 1000px) {
  .page-products .prod-body {
    grid-template-columns: var(--prod-rail-w) minmax(0, 1fr);
    gap: clamp(44px, 5vw, 80px);
    align-items: start;
  }

  .page-products .anchor-rail {
    position: sticky;
    top: calc(var(--nav-h) + 32px);
    border-top: 1px solid var(--hairline);
  }

  .page-products .anchor-rail__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-products .anchor-rail__link {
    width: 100%;
    justify-content: flex-start;
    border-color: transparent;
    border-left: 2px solid var(--hairline);
    border-radius: 0;
    padding: 10px 10px 10px 14px;
    white-space: normal;
  }

  .page-products .anchor-rail__link:hover,
  .page-products .anchor-rail__link:focus-visible {
    border-left-color: var(--teal);
    background: var(--teal-a08);
  }

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

@media (min-width: 1240px) {
  .page-products .prod-step__grid {
    grid-template-columns: 160px minmax(0, 1fr);
  }
}

/* ---------- 打印样式 ---------- */
@media print {
  .page-products {
    background: #fff;
    color: #14213A;
  }

  .page-products .prod-hero,
  .page-products .anchor-rail,
  .page-products .ver-switch__tabs,
  .page-products .prod-cta__actions,
  .page-products .figure__frame::after {
    display: none !important;
  }

  .page-products .prod-step {
    break-inside: avoid;
    border-top-color: #C9C6BC;
  }

  .page-products .prod-step__title,
  .page-products .prod-cta__title,
  .page-products .audit__head {
    color: #14213A;
  }

  .page-products .prose,
  .page-products .prod-note,
  .page-products .check-item__label,
  .page-products .pitfall-item__v,
  .page-products .audit__std,
  .page-products .faq__panel p {
    color: #14213A;
  }

  .page-products .prod-step__no {
    color: transparent;
    -webkit-text-stroke: 1px #14213A;
  }

  .page-products .mono {
    background: transparent;
    color: #14213A;
    border: 1px solid #C9C6BC;
  }

  .page-products .faq__panel {
    display: block;
  }
}

/* ---------- 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-products .check-item__box::after,
  .page-products .anchor-rail__link,
  .page-products .btn,
  .page-products .check-item__label,
  .page-products .faq__trigger,
  .page-products .audit__col {
    transition-property: color, background-color, border-color, outline-color, box-shadow;
    transition-duration: 1ms;
  }

  .page-products .figure--skew .figure__frame {
    transform: none;
  }
}

/* ==========================================================
   page-products — PC端与多链管理
   所有选择器限定在 .page-products 作用域内
   ========================================================== */

.page-products {
  --prod-gap: clamp(40px, 7vw, 92px);
  --prod-rail-w: 236px;
  display: block;
  background: var(--ink-900);
  color: var(--text-hi);
  font-family: var(--font-body);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-products .prod-hero {
  position: relative;
  padding-block: clamp(78px, 12vw, 148px) clamp(44px, 6vw, 76px);
  border-bottom: 1px solid var(--hairline);
  background:
    radial-gradient(120% 88% at 6% 0%, var(--teal-a08) 0%, rgba(46, 211, 166, 0) 58%),
    radial-gradient(90% 70% at 96% 12%, var(--amber-a08) 0%, rgba(255, 180, 77, 0) 62%),
    linear-gradient(180deg, var(--ink-950) 0%, var(--ink-900) 100%);
}

.page-products .prod-hero .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--text-mid);
  margin-bottom: clamp(28px, 5vw, 52px);
}

.page-products .prod-hero .breadcrumb a {
  color: var(--text-mid);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-products .prod-hero .breadcrumb a:hover,
.page-products .prod-hero .breadcrumb a:focus-visible {
  color: var(--teal);
  border-bottom-color: var(--teal);
}

.page-products .exhibit-label {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-mid);
  font-family: var(--font-mono);
}

.page-products .exhibit-label__no {
  display: inline-block;
  padding: 2px 7px;
  border: 1px solid var(--teal-a32);
  color: var(--teal);
  border-radius: 2px;
}

.page-products .exhibit-label__dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--hairline);
}

.page-products .prod-hero .display {
  margin: 0 0 22px;
  max-width: 15em;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(34px, 6.2vw, 84px);
  line-height: 1.04;
  letter-spacing: -0.025em;
  color: var(--text-hi);
}

.page-products .prod-hero .lede {
  margin: 0;
  max-width: 34em;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.8;
  color: var(--text-mid);
}

.page-products .prod-hero__facts {
  list-style: none;
  margin: clamp(32px, 5vw, 56px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
  border-radius: 3px;
  overflow: hidden;
}

.page-products .prod-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  background: var(--ink-950);
}

.page-products .prod-hero__k {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-mid);
  font-family: var(--font-mono);
}

.page-products .prod-hero__v {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(18px, 2.2vw, 24px);
  letter-spacing: -0.01em;
  color: var(--text-hi);
}

/* ---------- 主体两栏 ---------- */
.page-products .prod-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  padding-block: var(--prod-gap);
}

/* ---------- 左侧索引 ---------- */
.page-products .anchor-rail {
  border-top: 1px solid var(--hairline);
  padding-top: 16px;
}

.page-products .anchor-rail__label {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-mid);
  font-family: var(--font-mono);
}

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

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

.page-products .anchor-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  padding: 9px 12px;
  border: 1px solid var(--hairline);
  border-radius: 2px;
  color: var(--text-mid);
  text-decoration: none;
  font-size: 13px;
  white-space: nowrap;
  transition: color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

.page-products .anchor-rail__link:hover,
.page-products .anchor-rail__link:focus-visible {
  color: var(--text-hi);
  border-color: var(--teal-a56);
  background: var(--teal-a08);
  outline: none;
}

.page-products .anchor-rail__link:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

.page-products .anchor-rail__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--teal);
}

.page-products .anchor-rail__note {
  margin: 14px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--text-mid);
}

/* ---------- 步骤卡 ---------- */
.page-products .prod-flow {
  min-width: 0;
}

.page-products .prod-step {
  border-top: 1px solid var(--hairline);
  padding-top: clamp(22px, 3.4vw, 38px);
  margin-bottom: var(--prod-gap);
  scroll-margin-top: calc(var(--nav-h) + 28px);
}

.page-products .prod-step:last-of-type {
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-products .prod-step__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px 40px;
}

.page-products .prod-step__no {
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(56px, 13vw, 116px);
  line-height: 0.8;
  letter-spacing: -0.05em;
  font-variant-numeric: tabular-nums;
  color: var(--ink-700);
  -webkit-text-stroke: 1px var(--hairline);
  margin-bottom: 6px;
  user-select: none;
}

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

.page-products .prod-step__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 12px;
}

.page-products .prod-step__status {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--text-mid);
}

.page-products .tag {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 2px;
  font-size: 11px;
  letter-spacing: 0.12em;
  font-family: var(--font-mono);
  border: 1px solid var(--hairline);
  color: var(--text-mid);
}

.page-products .tag--current {
  border-color: var(--teal-a32);
  color: var(--teal);
  background: var(--teal-a08);
}

.page-products .tag--amber {
  border-color: var(--amber-a28);
  color: var(--amber);
  background: var(--amber-a08);
}

.page-products .tag--legacy {
  border-color: var(--violet-a50);
  color: var(--violet-legacy);
  background: var(--violet-a28);
}

.page-products .prod-step__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(23px, 3.3vw, 38px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--text-hi);
  max-width: 18em;
}

.page-products .prose {
  margin: 0 0 18px;
  max-width: 38em;
  font-size: 16px;
  line-height: 1.78;
  color: var(--text-mid);
}

.page-products .prod-note {
  margin: 16px 0;
  max-width: 38em;
  padding: 12px 14px;
  border-left: 2px solid var(--amber-a48);
  background: var(--amber-a08);
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-hi);
}

.page-products .prod-inline-link {
  margin: 20px 0 0;
}

.page-products .prod-mono-line {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.9;
  color: var(--text-mid);
}

.page-products .mono {
  font-family: var(--font-mono);
  font-size: 0.94em;
  padding: 2px 7px;
  border-radius: 2px;
  background: var(--paper-a10);
  color: var(--text-hi);
  word-break: break-all;
}

/* ---------- 图片 ---------- */
.page-products .figure {
  margin: 0 0 24px;
}

.page-products .figure--wide,
.page-products .figure--portrait {
  max-width: 100%;
}

.page-products .figure__frame {
  position: relative;
  border: 1px solid var(--hairline);
  border-radius: 3px;
  background: var(--ink-800);
  overflow: hidden;
  box-shadow: var(--shadow-hover);
}

.page-products .figure__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, var(--paper-a06) 1px, transparent 1px),
    linear-gradient(to bottom, var(--paper-a06) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: 0.55;
}

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

.page-products .figure--skew .figure__frame {
  transform: rotate(-1.4deg);
}

.page-products .figure__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  line-height: 1.7;
  color: var(--text-mid);
}

/* ---------- 勾选清单 ---------- */
.page-products .check-list {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  border-top: 1px solid var(--hairline);
}

.page-products .check-list--tight {
  margin: 12px 0 0;
  border-top: 1px solid var(--hairline);
}

.page-products .check-item {
  position: relative;
  border-bottom: 1px solid var(--hairline);
}

.page-products .check-item__input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: 0;
  padding: 0;
  opacity: 0;
  pointer-events: none;
}

.page-products .check-item__label {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  min-height: 44px;
  padding: 12px 6px;
  cursor: pointer;
  font-size: 15px;
  line-height: 1.65;
  color: var(--text-mid);
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-products .check-item__label:hover {
  color: var(--text-hi);
  background: var(--paper-a06);
}

.page-products .check-item__box {
  position: relative;
  flex: 0 0 16px;
  width: 16px;
  height: 16px;
  margin-top: 5px;
  border: 1px solid var(--text-mid);
  border-radius: 2px;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-products .check-item__box::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 1px;
  width: 5px;
  height: 9px;
  border-right: 2px solid var(--ink-950);
  border-bottom: 2px solid var(--ink-950);
  transform: rotate(45deg) scale(0);
  transition: transform var(--dur) var(--ease);
}

.page-products .check-item__input:focus-visible + .check-item__label .check-item__box {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

.page-products .check-item__input:checked + .check-item__label {
  color: var(--text-hi);
}

.page-products .check-item__input:checked + .check-item__label .check-item__box {
  background: var(--teal);
  border-color: var(--teal);
}

.page-products .check-item__input:checked + .check-item__label .check-item__box::after {
  transform: rotate(45deg) scale(1);
}

.page-products .check-item__text {
  min-width: 0;
}

/* ---------- 新旧版切换 ---------- */
.page-products .ver-switch {
  position: relative;
  margin: 22px 0 0;
}

.page-products .ver-switch__input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-products .ver-switch__tabs {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 3px;
  padding: 3px;
  margin-bottom: 20px;
  border: 1px solid var(--hairline);
  border-radius: 3px;
  background: var(--ink-800);
}

.page-products .ver-switch__tab {
  padding: 9px 16px;
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--text-mid);
  border-radius: 2px;
  cursor: pointer;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-products .ver-switch__tab:hover {
  color: var(--text-hi);
}

.page-products .ver-switch__input:focus-visible ~ .ver-switch__tabs {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

.page-products .ver-switch__input--new:checked ~ .ver-switch__tabs .ver-switch__tab--new,
.page-products .ver-switch__input--old:checked ~ .ver-switch__tabs .ver-switch__tab--old {
  background: var(--teal-a16);
  color: var(--teal);
}

.page-products .ver-switch__pane {
  display: none;
}

.page-products .ver-switch__input--new:checked ~ .ver-switch__pane--new {
  display: block;
}

.page-products .ver-switch__input--old:checked ~ .ver-switch__pane--old {
  display: block;
}

.page-products .ver-switch__pane--old {
  padding-left: 16px;
  border-left: 2px solid var(--violet-a50);
  filter: saturate(0.5);
}

/* ---------- 易混淆口径 ---------- */
.page-products .pitfall-list {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  border-top: 1px solid var(--hairline);
}

.page-products .pitfall-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 14px 6px;
  border-bottom: 1px solid var(--hairline);
  transition: background-color var(--dur) var(--ease);
}

.page-products .pitfall-item:hover {
  background: var(--paper-a06);
}

.page-products .pitfall-item__k {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--teal);
}

.page-products .pitfall-item__v {
  font-size: 15px;
  line-height: 1.72;
  color: var(--text-mid);
}

/* ---------- 地址核对三列 ---------- */
.page-products .audit {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: 0 0 8px;
}

.page-products .audit__col {
  padding: 18px 16px 14px;
  border: 1px solid var(--hairline);
  border-radius: 3px;
  background: var(--ink-800);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-products .audit__col:hover {
  border-color: var(--teal-a32);
  box-shadow: var(--shadow-hover);
}

.page-products .audit__head {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: 21px;
  letter-spacing: -0.01em;
  color: var(--text-hi);
}

.page-products .audit__head::before {
  content: "";
  display: block;
  width: 22px;
  height: 1px;
  margin-bottom: 10px;
  background: var(--amber);
}

.page-products .audit__std {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--text-mid);
}

/* ---------- 折叠问答 ---------- */
.page-products .faq {
  border-top: 1px solid var(--hairline);
  margin-top: 8px;
}

.page-products .faq__item {
  border-bottom: 1px solid var(--hairline);
}

.page-products .faq__trigger {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 16px 6px;
  cursor: pointer;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-hi);
  list-style: none;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

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

.page-products .faq__trigger:hover {
  color: var(--amber);
  background: var(--paper-a06);
}

.page-products .faq__trigger:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

.page-products .faq__mark {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-products .faq__panel {
  padding: 0 6px 20px 32px;
}

.page-products .faq__panel p {
  margin: 0 0 10px;
  max-width: 38em;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--text-mid);
}

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

/* ---------- 收尾 ---------- */
.page-products .prod-cta {
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  padding: clamp(28px, 4vw, 48px) 0;
}

.page-products .prod-cta__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(24px, 3.6vw, 42px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--text-hi);
}

.page-products .prod-cta__text {
  margin: 0 0 22px;
  max-width: 36em;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--text-mid);
}

.page-products .prod-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-products .btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 18px;
  border-radius: 2px;
  border: 1px solid var(--hairline);
  font-size: 14px;
  letter-spacing: 0.02em;
  text-decoration: none;
  color: var(--text-hi);
  background: transparent;
  transition: color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

.page-products .btn--primary {
  border-color: var(--teal-a56);
  background: var(--teal-a16);
  color: var(--teal);
}

.page-products .btn--primary:hover,
.page-products .btn--primary:focus-visible {
  background: var(--teal-a32);
  border-color: var(--teal);
  color: var(--text-hi);
}

.page-products .btn--ghost:hover,
.page-products .btn--ghost:focus-visible {
  border-color: var(--teal-a56);
  color: var(--teal);
  background: var(--teal-a08);
}

.page-products .btn--legacy {
  border-color: var(--violet-a50);
  color: var(--violet-legacy);
  filter: saturate(0.7);
}

.page-products .btn--legacy:hover,
.page-products .btn--legacy:focus-visible {
  border-color: var(--violet-legacy);
  color: var(--text-hi);
}

.page-products .btn:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

/* ==========================================================
   响应式
   ========================================================== */

@media (min-width: 560px) {
  .page-products .prod-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-products .pitfall-item {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 18px;
    align-items: baseline;
  }
}

@media (min-width: 760px) {
  .page-products .prod-step__grid {
    grid-template-columns: 136px minmax(0, 1fr);
  }

  .page-products .prod-step__no {
    margin-bottom: 0;
    margin-top: -10px;
  }
}

@media (min-width: 1000px) {
  .page-products .prod-body {
    grid-template-columns: var(--prod-rail-w) minmax(0, 1fr);
    gap: clamp(44px, 5vw, 80px);
    align-items: start;
  }

  .page-products .anchor-rail {
    position: sticky;
    top: calc(var(--nav-h) + 32px);
  }

  .page-products .anchor-rail__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-products .anchor-rail__link {
    width: 100%;
    justify-content: flex-start;
    border-color: transparent;
    border-left: 2px solid var(--hairline);
    border-radius: 0;
    padding: 10px 10px 10px 14px;
    white-space: normal;
  }

  .page-products .anchor-rail__link:hover,
  .page-products .anchor-rail__link:focus-visible {
    border-left-color: var(--teal);
    background: var(--teal-a08);
  }

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

@media (min-width: 1240px) {
  .page-products .prod-step__grid {
    grid-template-columns: 160px minmax(0, 1fr);
  }
}

/* ---------- 打印样式 ---------- */
@media print {
  .page-products {
    background: #fff;
    color: var(--text-on-paper);
  }

  .page-products .prod-hero,
  .page-products .anchor-rail,
  .page-products .ver-switch__tabs,
  .page-products .prod-cta__actions,
  .page-products .figure__frame::after {
    display: none !important;
  }

  .page-products .prod-step {
    break-inside: avoid;
    border-top-color: #C9C6BC;
  }

  .page-products .prod-step__title,
  .page-products .prod-cta__title,
  .page-products .audit__head {
    color: var(--text-on-paper);
  }

  .page-products .prose,
  .page-products .prod-note,
  .page-products .check-item__label,
  .page-products .pitfall-item__v,
  .page-products .audit__std,
  .page-products .faq__panel p {
    color: var(--text-on-paper);
  }

  .page-products .prod-step__no {
    color: transparent;
    -webkit-text-stroke: 1px var(--text-on-paper);
  }

  .page-products .mono {
    background: transparent;
    color: var(--text-on-paper);
    border: 1px solid #C9C6BC;
  }

  .page-products .faq__panel {
    display: block;
  }
}

/* ---------- 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-products .check-item__box::after,
  .page-products .anchor-rail__link,
  .page-products .btn,
  .page-products .check-item__label,
  .page-products .faq__trigger,
  .page-products .audit__col {
    transition-property: color, background-color, border-color, outline-color, box-shadow;
    transition-duration: 1ms;
  }

  .page-products .figure--skew .figure__frame {
    transform: none;
  }
}