/* ============================================================
   page-about · 品牌介绍
   ============================================================ */

.page-about {
  position: relative;
}

/* ---------- 面包屑 ---------- */
.page-about .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--tick);
  margin-bottom: 28px;
}
.page-about .crumbs a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.page-about .crumbs a:hover,
.page-about .crumbs a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 首屏框景 ---------- */
.page-about .about-hero {
  padding-top: 48px;
}

.page-about .about-hero__frame {
  position: relative;
  padding: 36px 20px 32px;
  border: 1px solid var(--line);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(52, 229, 192, 0.09) 0%, transparent 55%),
    radial-gradient(90% 120% at 0% 100%, rgba(255, 107, 51, 0.06) 0%, transparent 60%),
    var(--panel);
}

.page-about .about-hero__tick {
  position: absolute;
  width: 16px;
  height: 16px;
  border: 0 solid var(--cyan);
  pointer-events: none;
}
.page-about .about-hero__tick--tl { top: -1px; left: -1px; border-top-width: 2px; border-left-width: 2px; }
.page-about .about-hero__tick--tr { top: -1px; right: -1px; border-top-width: 2px; border-right-width: 2px; }
.page-about .about-hero__tick--bl { bottom: -1px; left: -1px; border-bottom-width: 2px; border-left-width: 2px; }
.page-about .about-hero__tick--br { bottom: -1px; right: -1px; border-bottom-width: 2px; border-right-width: 2px; }

.page-about .about-hero__eyebrow {
  margin: 0 0 18px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-about .about-hero h1 {
  margin: 0 0 20px;
  font-family: var(--serif);
  font-weight: 600;
  font-size: 27px;
  line-height: 1.32;
  letter-spacing: 0.01em;
  color: var(--text);
  max-width: 24ch;
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 64ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 首屏数据条 ---------- */
.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--line);
  border: 1px solid var(--line);
  border-top: 0;
}
.page-about .about-hero__stat {
  background: var(--ink-deep);
  padding: 16px 18px;
}
.page-about .about-hero__stat dt {
  margin: 0 0 8px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  color: var(--muted);
}
.page-about .about-hero__stat dd {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 5px;
}
.page-about .about-hero__num {
  font-family: var(--narrow);
  font-size: 30px;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--white);
}
.page-about .about-hero__unit {
  font-family: var(--sans);
  font-size: 12px;
  color: var(--muted);
}

/* ---------- 锚点目录 ---------- */
.page-about .about-toc {
  margin-top: 44px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.page-about .about-toc__list {
  list-style: none;
  margin: 0;
  padding: 12px 0;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 0;
}
.page-about .about-toc__item {
  display: flex;
  align-items: center;
}
.page-about .about-toc__link {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 5px 14px;
  font-size: 13px;
  color: var(--muted);
  text-decoration: none;
  border-left: 1px solid var(--line);
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease);
}
.page-about .about-toc__item:first-child .about-toc__link {
  border-left: 0;
  padding-left: 0;
}
.page-about .about-toc__num {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  color: var(--tick);
  transition: color 0.2s var(--ease);
}
.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible,
.page-about .about-toc__link.is-current {
  color: var(--cyan);
}
.page-about .about-toc__link:hover .about-toc__num,
.page-about .about-toc__link.is-current .about-toc__num {
  color: var(--orange);
}

/* ---------- 纵向错位版式 ---------- */
.page-about .about-flow {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 48px;
  padding-top: 56px;
}

.page-about .about-spine {
  display: none;
  position: absolute;
  top: 56px;
  bottom: 0;
  left: -26px;
  width: 1px;
  background: linear-gradient(180deg, transparent 0%, var(--line) 6%, var(--line) 94%, transparent 100%);
  pointer-events: none;
}
.page-about .about-spine::before {
  content: "";
  position: absolute;
  top: 0;
  left: -1px;
  width: 3px;
  height: 180px;
  background: linear-gradient(180deg, var(--cyan), transparent);
  opacity: 0.55;
}

/* ---------- 面板 ---------- */
.page-about .about-panel {
  padding: 22px 0 0;
  border-top: 1px solid var(--line);
}

.page-about .about-panel .panel__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  margin-bottom: 20px;
}
.page-about .panel__index {
  flex: 0 0 auto;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--orange);
  display: inline-block;
  transform-origin: left center;
  transition: transform 0.32s var(--ease), color 0.32s var(--ease);
}
.page-about .about-panel:hover .panel__index,
.page-about .about-panel:focus-within .panel__index {
  transform: scale(1.22);
  color: var(--cyan);
}
.page-about .panel__title {
  flex: 1 1 auto;
  min-width: 0;
  margin: 0;
  font-family: var(--serif);
  font-weight: 600;
  font-size: 20px;
  line-height: 1.38;
  letter-spacing: 0.01em;
  color: var(--text);
}
.page-about .panel__meta {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  color: var(--tick);
}

.page-about .panel__body p {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--text);
}
.page-about .panel__body p:last-child {
  margin-bottom: 0;
}

.page-about .panel__foot {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 16px;
  margin: 24px 0 0;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  color: var(--tick);
}

.page-about .about-panel__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px !important;
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 24px 0 0;
}
.page-about .about-figure__media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--overlay);
}
.page-about .about-figure__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(0.72) brightness(0.86);
}
.page-about .about-figure .frame__caption {
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 10.5px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--tick);
}

/* ---------- A-02 覆盖刻度条 ---------- */
.page-about .about-bars {
  list-style: none;
  margin: 22px 0 24px;
  padding: 0;
  display: grid;
  gap: 18px;
}
.page-about .about-bars__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}
.page-about .about-bars__name {
  font-size: 14px;
  line-height: 1.45;
  color: var(--text);
}
.page-about .about-bars__val {
  flex: 0 0 auto;
  font-family: var(--narrow);
  font-size: 17px;
  letter-spacing: 0.01em;
  color: var(--white);
  white-space: nowrap;
}
.page-about .about-bars__track {
  position: relative;
  height: 6px;
  background: var(--line);
  overflow: hidden;
}
.page-about .about-bars__fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), rgba(52, 229, 192, 0.35));
  transform-origin: left center;
  animation: about-bar-grow 0.9s var(--ease) both;
}
.page-about .about-bars__item:nth-child(1) .about-bars__fill { width: 44%; }
.page-about .about-bars__item:nth-child(2) .about-bars__fill { width: 29%; }
.page-about .about-bars__item:nth-child(3) .about-bars__fill { width: 17%; }
.page-about .about-bars__item:nth-child(4) .about-bars__fill { width: 10%; }

.page-about .about-bars__note {
  margin: 8px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 0.28s var(--ease), opacity 0.28s var(--ease);
}
.page-about .about-bars__item:hover .about-bars__note,
.page-about .about-bars__item:focus-within .about-bars__note {
  max-height: 120px;
  opacity: 1;
}
.page-about .about-bars__item:hover .about-bars__fill {
  filter: brightness(1.25);
}

@keyframes about-bar-grow {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

/* ---------- A-03 生产流程 ---------- */
.page-about .about-steps {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
}
.page-about .about-steps__item {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr);
  gap: 0 14px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}
.page-about .about-steps__item:first-child {
  padding-top: 6px;
}
.page-about .about-steps__num {
  font-family: var(--narrow);
  font-size: 22px;
  line-height: 1.3;
  letter-spacing: 0;
  color: var(--orange);
}
.page-about .about-steps__title {
  margin: 0 0 6px;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 15px;
  line-height: 1.5;
  color: var(--cyan);
}
.page-about .about-steps__text p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- A-04 团队 ---------- */
.page-about .about-team__lead {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin: 0 0 14px !important;
}
.page-about .about-team__big {
  font-family: var(--narrow);
  font-size: 68px;
  line-height: 0.9;
  letter-spacing: -0.03em;
  color: var(--white);
}
.page-about .about-team__unit {
  font-family: var(--sans);
  font-size: 14px;
  color: var(--muted);
}

.page-about .about-team__list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .about-team__item {
  padding: 14px 0 14px 14px;
  border-left: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.page-about .about-team__item:first-child {
  border-top: 1px solid var(--line);
}
.page-about .about-team__role {
  margin: 0 0 6px;
  font-family: var(--serif);
  font-weight: 600;
  font-size: 15px;
  line-height: 1.4;
  color: var(--text);
}
.page-about .about-team__item p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- A-05 时间轴 ---------- */
.page-about .about-timeline-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  margin-top: 6px;
}
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 20px;
  border-left: 1px solid var(--line);
}
.page-about .about-timeline__item {
  position: relative;
}
.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 16px;
  width: 8px;
  height: 8px;
  background: var(--ink-deep);
  border: 1px solid var(--cyan);
  border-radius: var(--radius);
}
.page-about .about-timeline__fold {
  border-bottom: 1px solid var(--line);
}
.page-about .about-timeline__summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 14px;
  padding: 12px 0;
  cursor: pointer;
  list-style: none;
  transition: color 0.2s var(--ease);
}
.page-about .about-timeline__summary::-webkit-details-marker {
  display: none;
}
.page-about .about-timeline__summary:hover,
.page-about .about-timeline__summary:focus-visible {
  color: var(--cyan);
}
.page-about .about-timeline__year {
  flex: 0 0 auto;
  min-width: 52px;
  font-family: var(--narrow);
  font-size: 22px;
  line-height: 1.2;
  letter-spacing: 0;
  color: var(--cyan);
}
.page-about .about-timeline__label {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--text);
}
.page-about .about-timeline__summary:hover .about-timeline__label {
  color: var(--cyan);
}
.page-about .about-timeline__body {
  padding: 0 0 14px 0;
}
.page-about .about-timeline__body p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--muted);
}
.page-about .about-figure--tall {
  margin: 0;
}
.page-about .about-figure--tall .about-figure__media img {
  aspect-ratio: 2 / 3;
  height: auto;
}

/* ---------- A-07 更新节奏 ---------- */
.page-about .about-cadence {
  list-style: none;
  margin: 4px 0 24px;
  padding: 0;
  border-top: 1px solid var(--line);
}
.page-about .about-cadence__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}
.page-about .about-cadence__when {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--orange);
}
.page-about .about-cadence__what {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--text);
}

/* ---------- 平板 ---------- */
@media (min-width: 700px) {
  .page-about .about-hero {
    padding-top: 64px;
  }
  .page-about .about-hero__frame {
    padding: 52px 44px 46px;
  }
  .page-about .about-hero h1 {
    font-size: 40px;
    max-width: 22ch;
  }
  .page-about .about-hero__lede {
    font-size: 16.5px;
  }
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-hero__num {
    font-size: 34px;
  }
  .page-about .panel__title {
    font-size: 22px;
  }
  .page-about .about-timeline-layout {
    grid-template-columns: minmax(0, 1fr) 150px;
    gap: 40px;
    align-items: start;
  }
  .page-about .about-cadence__item {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }
}

/* ---------- 桌面：非对称 12 列错位 ---------- */
@media (min-width: 960px) {
  .page-about .about-hero__frame {
    padding: 60px 56px 54px;
  }
  .page-about .about-hero h1 {
    font-size: 50px;
  }
  .page-about .about-flow {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: var(--panel-gap) 24px;
    padding-top: 88px;
  }
  .page-about .about-panel--wide {
    grid-column: 1 / span 7;
  }
  .page-about .about-panel--narrow {
    grid-column: 8 / span 5;
  }
  .page-about .about-spine {
    display: block;
  }
  .page-about .panel__title {
    font-size: 23px;
  }
  .page-about .about-timeline-layout {
    grid-template-columns: minmax(0, 1fr) 170px;
  }
  .page-about .about-team__big {
    font-size: 84px;
  }
}

@media (min-width: 1280px) {
  .page-about .about-hero h1 {
    font-size: 56px;
  }
  .page-about .about-team__big {
    font-size: 96px;
  }
}

/* ---------- 动效退让 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-bars__fill {
    animation: none;
  }
  .page-about .about-bars__note,
  .page-about .about-toc__link,
  .page-about .panel__index,
  .page-about .about-timeline__summary {
    transition: none;
  }
  .page-about .about-panel:hover .panel__index {
    transform: none;
  }
}
<<<END>>>