/* ===== 功能中心 /features/ ===== */
.page-products {
  --feat-line: rgba(127, 212, 255, 0.26);
  --feat-surface: rgba(18, 39, 77, 0.55);
  background: var(--ink);
  color: var(--cloud);
}

.page-products .feat-shell {
  width: min(1280px, 100% - 36px);
  margin-inline: auto;
  padding: 26px 0 72px;
}

/* ---------- 首屏 ---------- */
.page-products .feat-hero {
  margin: 26px 0 44px;
  padding-top: 22px;
  border-top: 3px solid var(--lime);
}

.page-products .feat-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 6.2vw, 72px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 14px 0 0;
  max-width: 22ch;
  color: var(--cloud);
}

.page-products .feat-hero__lede {
  margin: 20px 0 0;
  max-width: 66ch;
  font-size: 17px;
  line-height: 1.8;
  color: var(--mist);
}

.page-products .feat-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* ---------- 布局：索引 + 画布 ---------- */
.page-products .feat-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-products .feat-main {
  min-width: 0;
}

.page-products .feat-rail {
  border-top: 2px solid var(--feat-line);
  padding-top: 16px;
}

.page-products .feat-rail__title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--sky-soft);
  margin: 0 0 12px;
}

.page-products .feat-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
}

.page-products .feat-rail__item {
  flex: 0 0 auto;
}

.page-products .feat-rail__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 12px;
  border: 1px solid var(--feat-line);
  border-left-width: 3px;
  color: var(--mist);
  text-decoration: none;
  font-size: 13.5px;
  white-space: nowrap;
  transition: color var(--dur), background-color var(--dur), border-color var(--dur);
}

.page-products .feat-rail__link:hover,
.page-products .feat-rail__link:focus-visible {
  color: var(--cloud);
  background: rgba(30, 123, 255, 0.16);
}

.page-products .feat-rail__link[aria-current="true"] {
  color: var(--cloud);
  background: rgba(198, 242, 78, 0.12);
  border-left-color: var(--lime);
}

.page-products .feat-rail__num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--sky-soft);
}

@media (min-width: 1000px) {
  .page-products .feat-layout {
    grid-template-columns: 212px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-products .feat-rail {
    position: sticky;
    top: 100px;
  }

  .page-products .feat-rail__list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-products .feat-rail__item + .feat-rail__item {
    margin-top: 6px;
  }
}

/* ---------- 章节 ---------- */
.page-products .feat-section {
  padding-top: 34px;
  border-top: 2px solid var(--feat-line);
  margin-bottom: 64px;
}

.page-products .feat-main > .feat-section:first-child {
  border-top-color: var(--lime);
}

.page-products .feat-section > .section-head {
  max-width: 72ch;
}

/* ---------- 媒体框 ---------- */
.page-products .media-frame {
  margin: 26px 0 0;
  border: 2px solid var(--feat-line);
  background: var(--deep);
  box-shadow: var(--shadow-hard);
}

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

/* ---------- 功能清单 ---------- */
.page-products .feat-list {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-products .feat-item {
  border-top: 1px solid var(--feat-line);
  padding: 16px 0 6px;
}

.page-products .feat-item__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  position: relative;
}

.page-products .feat-item__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--sky-soft);
}

.page-products .feat-item__title {
  flex: 1 1 auto;
  margin: 0;
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--cloud);
}

.page-products .feat-item__desc {
  margin: 9px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

@media (min-width: 780px) {
  .page-products .feat-list {
    grid-template-columns: 1fr 1fr;
    column-gap: 52px;
    row-gap: 22px;
  }

  .page-products .feat-list > .feat-item:nth-child(even) {
    margin-top: 34px;
  }
}

/* ---------- 状态标签 ---------- */
.page-products .tag {
  position: relative;
}

.page-products .tag__note {
  position: absolute;
  left: 0;
  top: calc(100% + 8px);
  z-index: 6;
  width: max-content;
  max-width: 240px;
  padding: 8px 10px;
  background: var(--ink);
  border: 1px solid var(--line-strong);
  color: var(--cloud);
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 400;
  line-height: 1.6;
  letter-spacing: 0;
  text-transform: none;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--dur), visibility var(--dur);
}

.page-products .tag:hover .tag__note,
.page-products .tag:focus .tag__note,
.page-products .tag:focus-within .tag__note {
  opacity: 1;
  visibility: visible;
}

/* ---------- 小屏适配 ---------- */
.page-products .adapt-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  margin-top: 26px;
}

.page-products .adapt-copy .prose {
  margin: 0 0 16px;
  line-height: 1.85;
}

.page-products .adapt-copy .prose:last-of-type {
  margin-bottom: 0;
}

.page-products .adapt-stats {
  list-style: none;
  margin: 26px 0 0;
  padding: 20px 0 0;
  border-top: 2px solid var(--feat-line);
  display: grid;
  gap: 16px;
}

.page-products .adapt-stats__num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 26px;
  font-weight: 500;
  line-height: 1.1;
  color: var(--lime);
}

.page-products .adapt-stats__label {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mist);
}

@media (min-width: 560px) {
  .page-products .adapt-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }
}

@media (min-width: 860px) {
  .page-products .adapt-grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: 46px;
    align-items: start;
  }

  .page-products .adapt-media.media-frame {
    margin-top: 0;
  }
}

/* ---------- 步骤 ---------- */
.page-products .step-list {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-products .step-card {
  background: var(--deep);
  border: 2px solid var(--feat-line);
  box-shadow: var(--shadow-hard);
  padding: 22px 20px 24px;
  transition: border-color var(--dur);
}

.page-products .step-card:hover,
.page-products .step-card:focus-within {
  border-color: var(--lime);
}

.page-products .step-card__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  background: var(--lime);
  border: 2px solid var(--ink);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.page-products .step-card__title {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--cloud);
}

.page-products .step-card__text {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--mist);
}

@media (min-width: 820px) {
  .page-products .step-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
    align-items: start;
  }

  .page-products .step-list > .step-card:nth-child(2) {
    margin-top: 44px;
  }

  .page-products .step-list > .step-card:nth-child(3) {
    margin-top: 88px;
  }
}

/* ---------- 四条路径 ---------- */
.page-products .path-list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-products .path-item {
  padding: 6px 0 6px 18px;
  border-left: 4px solid var(--sky);
}

.page-products .path-item--ball {
  border-left-color: var(--orange);
}

.page-products .path-item--cup {
  border-left-color: var(--wine);
}

.page-products .path-item--data {
  border-left-color: var(--lime);
}

.page-products .path-item__title {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 700;
  color: var(--cloud);
  letter-spacing: 0.04em;
}

.page-products .path-item__text {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--mist);
}

@media (min-width: 780px) {
  .page-products .path-list {
    grid-template-columns: 1fr 1fr;
    column-gap: 48px;
    row-gap: 30px;
  }
}

/* ---------- 版本表格 ---------- */
.page-products .table-scroll {
  margin-top: 26px;
  border: 2px solid var(--feat-line);
  background: var(--feat-surface);
}

.page-products .feat-note {
  margin: 24px 0 0;
  max-width: 74ch;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 登录状态 ---------- */
.page-products .device-list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-products .device-item {
  padding: 22px 22px 24px;
  border: 2px solid var(--feat-line);
  border-left: 4px solid var(--sky);
  background: var(--feat-surface);
}

.page-products .device-item:nth-child(2) {
  border-left-color: var(--lime);
  background: rgba(12, 58, 52, 0.5);
}

.page-products .device-item:nth-child(3) {
  border-left-color: var(--orange);
}

.page-products .device-item__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  color: var(--cloud);
}

.page-products .device-item__text {
  margin: 10px 0 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 收尾通道 ---------- */
.page-products .feat-cta {
  margin-top: 34px;
  padding: 26px 22px 28px;
  border: 2px solid var(--lime);
  background: rgba(198, 242, 78, 0.07);
  box-shadow: var(--shadow-hard);
}

.page-products .feat-cta__text {
  margin: 0;
  max-width: 64ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--cloud);
}

.page-products .feat-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

/* ---------- 行内链接与焦点 ---------- */
.page-products .feat-inline-link {
  color: var(--sky-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--dur);
}

.page-products .feat-inline-link:hover,
.page-products .feat-inline-link:focus-visible {
  color: var(--lime);
}

.page-products a:focus-visible,
.page-products [tabindex]:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .page-products * {
    transition-duration: 0.01ms !important;
  }
}