/* ===== 品牌总览 / page-about ===== */

.page-about {
  --about-hair: rgba(242, 237, 228, 0.13);
  --about-hair-strong: rgba(242, 237, 228, 0.28);
  --about-anchor-offset: 132px;
  display: block;
  background: var(--ink);
  color: var(--text);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(28px, 5vw, 56px) 0 clamp(46px, 7vw, 88px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: -14%;
  right: -22%;
  width: min(70vw, 720px);
  aspect-ratio: 1 / 1;
  background:
    radial-gradient(circle at 34% 30%, rgba(63, 224, 208, 0.20), transparent 62%),
    radial-gradient(circle at 70% 72%, rgba(201, 123, 90, 0.16), transparent 66%);
  clip-path: polygon(30% 0, 100% 16%, 86% 100%, 0 78%);
  pointer-events: none;
}

.page-about .about-hero__eyebrow {
  margin-top: clamp(20px, 4vw, 40px);
  color: var(--cyan);
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  max-width: 16ch;
  font-weight: 300;
  letter-spacing: -0.03em;
  line-height: 1.06;
}

.page-about .about-hero__lead {
  max-width: 54ch;
  margin: clamp(20px, 3vw, 30px) 0 0;
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-about .about-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin: clamp(32px, 5vw, 52px) 0 0;
  padding-top: 22px;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-stat {
  flex: 1 1 140px;
  min-width: 0;
  padding: 8px 20px 8px 0;
  border-right: 1px solid var(--about-hair);
}

.page-about .about-stat:last-child {
  border-right: 0;
}

.page-about .about-stat__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--rock);
}

.page-about .about-stat__value {
  margin: 8px 0 0;
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.1;
  color: var(--cream);
}

/* ---------- 画布与索引 ---------- */

.page-about .about-canvas {
  padding: clamp(34px, 5vw, 60px) 0 clamp(60px, 9vw, 120px);
}

.page-about .about-canvas__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
}

.page-about .about-index {
  min-width: 0;
}

.page-about .about-index__title {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--rock);
}

.page-about .about-index__list {
  display: flex;
  gap: 2px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-index__list::-webkit-scrollbar {
  display: none;
}

.page-about .about-index__item {
  flex: 0 0 auto;
}

.page-about .about-index__link {
  display: block;
  padding: 9px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  white-space: nowrap;
  color: var(--text-dim);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 0.24s var(--ease), border-color 0.24s var(--ease), background-color 0.24s var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
  background: rgba(63, 224, 208, 0.07);
  outline: none;
}

/* ---------- 内容区块 ---------- */

.page-about .about-block {
  padding: clamp(38px, 6vw, 76px) 0 clamp(30px, 4vw, 52px);
  border-top: 1px solid var(--about-hair);
  scroll-margin-top: var(--about-anchor-offset);
}

.page-about .about-block:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-block__head {
  max-width: 62ch;
}

.page-about .about-block__title {
  margin: 12px 0 0;
  font-size: clamp(26px, 3.6vw, 40px);
  font-weight: 300;
  line-height: 1.24;
  letter-spacing: -0.02em;
  color: var(--cream);
}

.page-about .about-block__lead {
  max-width: 56ch;
  margin: 16px 0 0;
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 六大板块 ---------- */

.page-about .about-modules {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-module {
  padding: 18px 0 20px;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-module__no {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--moss);
}

.page-about .about-module__name {
  margin: 8px 0 0;
  font-size: 20px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--cream);
}

.page-about .about-module__desc {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--text-dim);
}

.page-about .about-module:nth-child(3n + 2) .about-module__no {
  color: var(--cyan);
}

.page-about .about-module:nth-child(3n) .about-module__no {
  color: var(--clay);
}

/* ---------- 时间线 ---------- */

.page-about .about-timeline {
  position: relative;
  margin: clamp(30px, 4vw, 48px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 26px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), var(--moss) 52%, var(--clay));
  opacity: 0.45;
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 32px 32px;
}

.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--moss);
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.page-about .about-timeline__item:nth-child(3n + 1)::before {
  border-color: var(--cyan);
}

.page-about .about-timeline__item:nth-child(3n + 2)::before {
  border-color: var(--orange);
}

.page-about .about-timeline__item:hover::before {
  border-color: var(--cyan);
  box-shadow: 0 0 0 6px rgba(63, 224, 208, 0.14);
}

.page-about .about-timeline__year {
  margin: 0;
  font-size: clamp(22px, 2.6vw, 30px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--moss);
}

.page-about .about-timeline__item:nth-child(3n + 1) .about-timeline__year {
  color: var(--cyan);
}

.page-about .about-timeline__item:nth-child(3n + 2) .about-timeline__year {
  color: var(--orange);
}

.page-about .about-timeline__title {
  margin: 12px 0 0;
  font-size: 20px;
  font-weight: 500;
  color: var(--cream);
}

.page-about .about-timeline__text {
  max-width: 58ch;
  margin: 8px 0 0;
  font-size: 16px;
  line-height: 1.76;
  color: var(--text-dim);
}

.page-about .about-timeline__note {
  display: block;
  max-height: 0;
  margin-top: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--rock);
  transition: max-height 0.34s var(--ease), opacity 0.28s var(--ease), margin-top 0.28s var(--ease);
}

.page-about .about-timeline__item:hover .about-timeline__note,
.page-about .about-timeline__item:focus-within .about-timeline__note {
  max-height: 160px;
  margin-top: 8px;
  opacity: 1;
}

/* ---------- 图文分栏 ---------- */

.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  margin: clamp(28px, 4vw, 44px) 0 0;
}

.page-about .about-split__text {
  max-width: 58ch;
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-about .about-split__note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--rock);
}

.page-about .about-split .media-frame {
  margin: 0;
}

/* ---------- 数字块 ---------- */

.page-about .about-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
}

.page-about .about-figure {
  background: var(--ink);
  padding: 20px 18px;
}

.page-about .about-figure__num {
  display: block;
  font-size: clamp(26px, 4vw, 40px);
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-figure__label {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-dim);
}

.page-about .about-figure:nth-child(2) .about-figure__num {
  color: var(--orange);
}

.page-about .about-figure:nth-child(3) .about-figure__num {
  color: var(--moss);
}

.page-about .about-figure:nth-child(4) .about-figure__num {
  color: var(--clay);
}

/* ---------- 能力条目 ---------- */

.page-about .about-facts {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-fact {
  padding: 18px 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-fact:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-fact__title {
  margin: 0;
  font-size: 18px;
  font-weight: 500;
  color: var(--cream);
}

.page-about .about-fact__title::before {
  content: "";
  display: inline-block;
  width: 18px;
  height: 2px;
  margin-right: 10px;
  vertical-align: 6px;
  background: var(--cyan);
}

.page-about .about-fact__text {
  max-width: 56ch;
  margin: 8px 0 0 28px;
  font-size: 15px;
  line-height: 1.76;
  color: var(--text-dim);
}

/* ---------- 合作与认可 ---------- */

.page-about .about-partners {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin: clamp(28px, 4vw, 42px) 0 0;
}

.page-about .about-partner-figure {
  padding: 24px 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-partner-figure__num {
  margin: 0;
  font-size: clamp(38px, 6vw, 64px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--orange);
}

.page-about .about-partner-figure:nth-child(2) .about-partner-figure__num {
  color: var(--moss);
}

.page-about .about-partner-figure__label {
  margin: 12px 0 0;
  font-size: 16px;
  color: var(--cream);
}

.page-about .about-partner-figure__text {
  max-width: 46ch;
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.74;
  color: var(--text-dim);
}

.page-about .about-recognition {
  margin: clamp(24px, 3vw, 36px) 0 0;
  padding: clamp(22px, 3vw, 30px);
  border-left: 3px solid var(--clay);
  background: linear-gradient(100deg, rgba(201, 123, 90, 0.12), rgba(10, 26, 47, 0) 72%);
}

.page-about .about-recognition__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--clay);
}

.page-about .about-recognition__list {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-recognition__item {
  padding: 7px 0 7px 20px;
  position: relative;
  font-size: 16px;
  color: var(--cream);
}

.page-about .about-recognition__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 15px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--clay);
}

.page-about .about-recognition__note {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-dim);
}

/* ---------- 使用场景 ---------- */

.page-about .about-scene-media {
  margin: clamp(26px, 4vw, 42px) 0 0;
}

.page-about .about-scenes {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-scene {
  padding: 20px 0 22px;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-scene__no {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--rock);
}

.page-about .about-scene__title {
  margin: 10px 0 0;
  font-size: 20px;
  font-weight: 500;
  color: var(--cream);
}

.page-about .about-scene__text {
  max-width: 58ch;
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text-dim);
}

/* ---------- 结尾行动区 ---------- */

.page-about .about-cta {
  padding: clamp(44px, 7vw, 80px) 0 clamp(56px, 8vw, 96px);
  background: linear-gradient(180deg, rgba(19, 41, 74, 0) 0%, rgba(19, 41, 74, 0.85) 32%, rgba(14, 59, 69, 0.6) 100%);
  border-top: 1px solid var(--about-hair-strong);
}

.page-about .about-cta__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 32px);
  align-items: center;
}

.page-about .about-cta__title {
  margin: 0;
  font-size: clamp(24px, 3.4vw, 36px);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.24;
  color: var(--cream);
}

.page-about .about-cta__lead {
  max-width: 52ch;
  margin: 12px 0 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--text-dim);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 0;
}

/* ---------- 媒体框架微调 ---------- */

.page-about .media-frame__img {
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-split .media-frame__img {
  aspect-ratio: 14 / 9;
}

.page-about .about-scene-media .media-frame__img {
  aspect-ratio: 16 / 7;
}

/* ---------- 响应式 ---------- */

@media (min-width: 700px) {
  .page-about .about-modules {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 44px;
  }

  .page-about .about-partners {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 48px;
  }

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

@media (min-width: 900px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 1fr);
    align-items: center;
  }

  .page-about .about-split--flip .media-frame {
    order: 2;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.1fr) auto;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 960px) {
  .page-about .about-canvas__grid {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 64px;
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 136px;
  }

  .page-about .about-index__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
    border-bottom: 0;
    border-left: 1px solid var(--about-hair);
  }

  .page-about .about-index__link {
    border-bottom: 0;
    border-left: 2px solid transparent;
    margin-left: -1px;
    padding: 10px 14px;
    white-space: normal;
  }

  .page-about .about-index__link:hover,
  .page-about .about-index__link:focus-visible {
    border-bottom-color: transparent;
    border-left-color: var(--cyan);
  }

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

@media (hover: none) {
  .page-about .about-timeline__note {
    max-height: none;
    margin-top: 8px;
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__link,
  .page-about .about-timeline__item::before,
  .page-about .about-timeline__note {
    transition: none;
  }
}