/* ===== 品牌使命 · page-about ===== */

.page-about {
  --about-h2: clamp(1.55rem, 2.8vw, 2.35rem);
  --about-num: clamp(3.4rem, 7vw, 5.2rem);
  display: block;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(18px, 3vw, 36px) var(--pad-x) clamp(64px, 8vw, 110px);
  color: var(--white);
  font-family: var(--font-body);
}

/* --- 面包屑 --- */
.page-about .breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .08em;
  color: var(--silver);
  padding-bottom: clamp(20px, 4vw, 40px);
}

.page-about .breadcrumb a {
  color: var(--silver);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s ease, border-color .18s ease;
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan-line);
  outline: none;
}

.page-about .breadcrumb span[aria-hidden] {
  margin: 0 .5em;
  opacity: .45;
}

.page-about .breadcrumb span:last-child {
  color: var(--white);
}

/* --- 首屏 --- */
.page-about .about-hero {
  padding-bottom: clamp(36px, 6vw, 64px);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-hero__kicker {
  margin: 0 0 clamp(14px, 2vw, 22px);
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.3rem, 5.6vw, 4.6rem);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-about .about-hero__lede {
  margin: clamp(20px, 3vw, 28px) 0 0;
  max-width: 60ch;
  font-size: var(--step-body);
  line-height: 1.78;
  color: rgba(244, 241, 234, .82);
}

/* --- 关键数字条 --- */
.page-about .about-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  list-style: none;
  margin: 0;
  padding: 0;
  background: var(--line);
  border: 1px solid var(--line);
  margin-top: clamp(28px, 4vw, 44px);
}

.page-about .about-figures__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: clamp(18px, 2.4vw, 28px) clamp(14px, 2vw, 22px);
  background: var(--night);
}

.page-about .about-figures__num {
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 3.6vw, 2.8rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-figures__plus {
  font-size: .55em;
  vertical-align: super;
  color: var(--orange);
}

.page-about .about-figures__label {
  font-size: .82rem;
  line-height: 1.5;
  color: var(--silver);
}

/* --- 章节骨架 --- */
.page-about .about-chapter {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(10px, 2vw, 20px);
  padding: clamp(48px, 7vw, 92px) 0 0;
  border-top: 1px solid var(--line-soft);
  margin-top: clamp(48px, 7vw, 92px);
}

.page-about .about-chapter__num {
  font-family: var(--font-display);
  font-size: var(--about-num);
  font-weight: 800;
  line-height: .82;
  letter-spacing: -.02em;
  color: transparent;
  -webkit-text-stroke: 1.4px rgba(59, 240, 196, .48);
  user-select: none;
}

.page-about .about-chapter__title {
  margin: 0 0 .75em;
  font-family: var(--font-display);
  font-size: var(--about-h2);
  font-weight: 700;
  line-height: 1.14;
  letter-spacing: .005em;
  color: var(--white);
  max-width: 26ch;
}

.page-about .about-chapter__body p {
  margin: 0 0 1.05em;
  max-width: 68ch;
  font-size: var(--step-body);
  line-height: 1.78;
  color: rgba(244, 241, 234, .82);
}

.page-about .about-chapter__body p:last-child {
  margin-bottom: 0;
}

.page-about .about-chapter__body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-line);
  transition: color .18s ease, border-color .18s ease;
}

.page-about .about-chapter__body a:hover,
.page-about .about-chapter__body a:focus-visible {
  color: var(--white);
  border-bottom-color: var(--white);
  outline: none;
}

/* --- 批次时间点 --- */
.page-about .about-batches {
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 clamp(24px, 3vw, 34px);
  padding: 0;
  border-left: 1px solid var(--cyan-line);
}

.page-about .about-batches__item {
  position: relative;
  padding: 0 0 clamp(22px, 3vw, 32px) clamp(18px, 2.6vw, 30px);
}

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

.page-about .about-batches__item::before {
  content: "";
  position: absolute;
  left: -4.5px;
  top: 8px;
  width: 8px;
  height: 8px;
  background: var(--night);
  border: 1.5px solid var(--cyan);
  border-radius: 50%;
}

.page-about .about-batches__time {
  display: block;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .1em;
  color: var(--orange);
  margin-bottom: 6px;
}

.page-about .about-batches__name {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 1.6vw, 1.4rem);
  font-weight: 600;
  color: var(--white);
  margin-bottom: 6px;
}

.page-about .about-batches__text {
  margin: 0;
  font-size: .95rem;
  line-height: 1.72;
  color: rgba(244, 241, 234, .76);
  max-width: 60ch;
}

/* --- 图片 --- */
.page-about .about-figure {
  margin: clamp(26px, 3.5vw, 42px) 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--line);
  background: var(--card);
}

.page-about .about-figure--wide img {
  aspect-ratio: 2 / 1;
}

.page-about .about-figure--square img {
  aspect-ratio: 4 / 3;
}

.page-about .about-figure figcaption {
  margin-top: .7em;
  max-width: 62ch;
  font-size: .8rem;
  line-height: 1.65;
  color: var(--silver);
}

/* --- 九年时间轴 --- */
.page-about .about-timeline {
  margin-top: clamp(48px, 7vw, 92px);
  padding-top: clamp(40px, 6vw, 72px);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-timeline__title {
  margin: 0 0 .5em;
  font-family: var(--font-display);
  font-size: var(--about-h2);
  font-weight: 700;
  line-height: 1.14;
  color: var(--white);
  max-width: 24ch;
}

.page-about .about-timeline__note {
  margin: 0 0 clamp(24px, 4vw, 40px);
  font-size: .86rem;
  line-height: 1.6;
  color: var(--silver);
}

.page-about .about-timeline__scroll {
  overflow-x: auto;
  overflow-y: hidden;
  padding-bottom: 14px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--cyan-line) transparent;
}

.page-about .about-timeline__scroll:focus-visible {
  outline: 1px solid var(--cyan);
  outline-offset: 4px;
}

.page-about .about-timeline__inner {
  position: relative;
  width: max-content;
  min-width: 100%;
}

.page-about .about-timeline__axis {
  position: absolute;
  left: 0;
  right: 0;
  top: 33px;
  height: 2px;
  pointer-events: none;
}

.page-about .about-timeline__axis svg {
  display: block;
  width: 100%;
  height: 2px;
}

.page-about .about-timeline__list {
  display: flex;
  gap: clamp(22px, 3.4vw, 48px);
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-timeline__item {
  flex: 0 0 auto;
  width: clamp(148px, 17vw, 196px);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.page-about .about-timeline__year {
  display: block;
  height: 12px;
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: .78rem;
  line-height: 1;
  letter-spacing: .08em;
  color: var(--silver);
}

.page-about .about-timeline__dot {
  width: 11px;
  height: 11px;
  margin-bottom: 16px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(59, 240, 196, .14);
}

.page-about .about-timeline__item--now .about-timeline__dot {
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 107, 44, .18);
}

.page-about .about-timeline__item--now .about-timeline__year {
  color: var(--orange);
}

.page-about .about-timeline__text {
  font-size: .88rem;
  line-height: 1.68;
  color: rgba(244, 241, 234, .78);
}

/* --- 两步路径 --- */
.page-about .about-steps {
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: clamp(24px, 3.5vw, 40px) 0 clamp(24px, 3vw, 32px);
  padding: 0;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-steps__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: clamp(18px, 2.4vw, 26px) clamp(16px, 2vw, 24px);
  background: var(--card);
}

.page-about .about-steps__item--on {
  background: var(--deep);
  box-shadow: inset 2px 0 0 var(--cyan);
}

.page-about .about-steps__idx {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--silver);
}

.page-about .about-steps__item--on .about-steps__idx {
  color: var(--cyan);
}

.page-about .about-steps__title {
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 1.5vw, 1.3rem);
  font-weight: 600;
  color: var(--white);
}

.page-about .about-steps__text {
  font-size: .88rem;
  line-height: 1.66;
  color: rgba(244, 241, 234, .74);
}

/* --- 对照表 --- */
.page-about .about-table-wrap {
  margin: clamp(24px, 3.5vw, 38px) 0 clamp(22px, 3vw, 30px);
  overflow-x: auto;
  border-top: 1px solid var(--cyan-line);
  -webkit-overflow-scrolling: touch;
}

.page-about .about-table {
  width: 100%;
  min-width: 540px;
  border-collapse: collapse;
  font-size: .93rem;
}

.page-about .about-table__cap {
  caption-side: top;
  text-align: left;
  padding: 12px 0 14px;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--silver);
}

.page-about .about-table th,
.page-about .about-table td {
  text-align: left;
  vertical-align: top;
  padding: 14px 22px 14px 0;
  border-bottom: 1px solid var(--line-soft);
  line-height: 1.66;
}

.page-about .about-table th {
  font-family: var(--font-mono);
  font-size: .74rem;
  font-weight: 500;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--silver);
  padding-top: 0;
}

.page-about .about-table td:first-child {
  padding-right: 30px;
  color: var(--white);
  font-weight: 600;
  white-space: nowrap;
}

.page-about .about-table td:last-child {
  color: rgba(244, 241, 234, .8);
}

/* --- 团队反白区块 --- */
.page-about .about-team {
  margin-top: clamp(48px, 7vw, 92px);
  padding: clamp(30px, 5vw, 62px) clamp(22px, 4vw, 56px);
  background: var(--paper);
  color: #0b1a17;
}

.page-about .about-team__kicker {
  margin: 0 0 clamp(10px, 1.6vw, 16px);
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: #2a6b5c;
}

.page-about .about-team__title {
  margin: 0 0 .55em;
  font-family: var(--font-display);
  font-size: var(--about-h2);
  font-weight: 700;
  line-height: 1.14;
  color: #0b1a17;
  max-width: 22ch;
}

.page-about .about-team__lede {
  margin: 0;
  max-width: 62ch;
  font-size: var(--step-body);
  line-height: 1.76;
  color: rgba(11, 26, 23, .76);
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: clamp(24px, 3.5vw, 40px);
  background: rgba(11, 26, 23, .16);
  border: 1px solid rgba(11, 26, 23, .16);
}

.page-about .about-team__cell {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(20px, 2.6vw, 32px);
  background: var(--paper);
}

.page-about .about-team__num {
  font-family: var(--font-mono);
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: #1f6f5e;
  font-variant-numeric: tabular-nums;
}

.page-about .about-team__name {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 1.6vw, 1.35rem);
  font-weight: 700;
  color: #0b1a17;
}

.page-about .about-team__text {
  margin: 0;
  font-size: .92rem;
  line-height: 1.72;
  color: rgba(11, 26, 23, .76);
}

/* --- 后续方向 --- */
.page-about .about-next {
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: clamp(24px, 3.5vw, 40px) 0 0;
  padding: 0;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-next__item {
  position: relative;
  padding: clamp(20px, 2.6vw, 30px) clamp(16px, 2vw, 26px);
  background: var(--night);
}

.page-about .about-next__no {
  display: block;
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .16em;
  color: var(--orange);
  margin-bottom: 10px;
}

.page-about .about-next__title {
  margin: 0 0 .5em;
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 1.6vw, 1.4rem);
  font-weight: 600;
  color: var(--white);
}

.page-about .about-next__text {
  margin: 0;
  font-size: .92rem;
  line-height: 1.72;
  color: rgba(244, 241, 234, .76);
}

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

/* --- 收尾速查链接 --- */
.page-about .about-links {
  margin-top: clamp(48px, 7vw, 92px);
  padding-top: clamp(30px, 4vw, 52px);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-links__lead {
  margin: 0 0 clamp(18px, 2.6vw, 28px);
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 1.8vw, 1.5rem);
  font-weight: 600;
  color: var(--white);
}

.page-about .about-links__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-links__card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: clamp(18px, 2.4vw, 26px) clamp(16px, 2vw, 22px);
  background: var(--night);
  text-decoration: none;
  position: relative;
  transition: background .2s ease;
}

.page-about .about-links__card::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 0;
  height: 1px;
  background: var(--cyan);
  transition: right .22s ease;
}

.page-about .about-links__card:hover,
.page-about .about-links__card:focus-visible {
  background: var(--card);
  outline: none;
}

.page-about .about-links__card:hover::after,
.page-about .about-links__card:focus-visible::after {
  right: 0;
}

.page-about .about-links__k {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--white);
}

.page-about .about-links__v {
  font-size: .84rem;
  line-height: 1.6;
  color: var(--silver);
}

/* --- 响应式 --- */
@media (min-width: 620px) {
  .page-about .about-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

@media (min-width: 900px) {
  .page-about .about-chapter {
    grid-template-columns: minmax(0, 0.72fr) minmax(0, 2.4fr);
    column-gap: clamp(28px, 4.5vw, 68px);
    align-items: start;
  }

  .page-about .about-chapter__body {
    margin-top: clamp(18px, 2.6vw, 40px);
  }

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

  .page-about .about-links__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-about .about-hero {
    display: grid;
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    column-gap: clamp(36px, 5vw, 84px);
    align-items: end;
  }

  .page-about .about-hero__kicker {
    grid-column: 1 / -1;
  }

  .page-about .about-hero__title {
    grid-column: 1;
  }

  .page-about .about-hero__lede {
    grid-column: 2;
    margin-top: 0;
    padding-bottom: .35em;
  }
}

/* --- 动效与无障碍 --- */
.page-about .about-links__card:focus-visible {
  box-shadow: inset 0 0 0 1px var(--cyan);
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-links__card,
  .page-about .about-links__card::after,
  .page-about .breadcrumb a,
  .page-about .about-chapter__body a {
    transition: none !important;
  }

  .page-about .about-links__card:hover::after,
  .page-about .about-links__card:focus-visible::after {
    right: 100%;
  }
}