/* ===== 品牌溯源 /mission/ 页面专属样式 ===== */

.page-about {
  --about-rail: 46px;
  --about-ink-soft: rgba(124, 143, 163, 0.24);
  --about-glass: rgba(27, 58, 85, 0.46);
  --about-shadow: 0 18px 44px rgba(3, 10, 18, 0.45);
}

/* --- 首屏 --- */
.page-about .about-hero {
  padding-top: 6px;
}

.page-about .about-hero__inner {
  display: grid;
  gap: 28px;
  padding: 18px 0 30px;
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(30px, 7.6vw, 58px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--c-text);
}

.page-about .about-hero__lede {
  margin: 18px 0 0;
  max-width: 48ch;
  color: var(--c-text-2);
  font-size: 16.5px;
  line-height: 1.85;
}

.page-about .about-figures {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-ink-soft);
  border: var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-figure {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 14px 18px;
  background: var(--c-surface);
  transition: background 180ms var(--ease);
}

.page-about .about-figure:hover {
  background: #12324d;
}

.page-about .about-figure__num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 26px;
  line-height: 1.1;
  letter-spacing: 0.02em;
  color: var(--c-text);
  transition: transform 180ms var(--ease), color 180ms var(--ease);
}

.page-about .about-figure:hover .about-figure__num {
  transform: scale(1.06);
  color: var(--c-accent);
}

.page-about .about-figure__num em {
  font-style: normal;
  font-size: 14px;
  color: var(--c-text-2);
  margin-left: 2px;
}

.page-about .about-figure__label {
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--c-text-2);
}

.page-about .about-hero__figure {
  margin: 0;
}

.page-about .about-ridge {
  margin-top: 22px;
  color: var(--c-border);
  opacity: 0.7;
}

.page-about .about-ridge svg {
  display: block;
  width: 100%;
  height: 74px;
}

/* --- 页内目录 --- */
.page-about .about-toc {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 6px 0 12px;
  margin-bottom: 4px;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-toc .toc__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 15px;
  border-radius: 999px;
  border: var(--line);
  background: var(--about-glass);
  color: var(--c-text-2);
  font-size: 13.5px;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 180ms var(--ease), color 180ms var(--ease), background 180ms var(--ease);
}

.page-about .about-toc .toc__link:hover,
.page-about .about-toc .toc__link:focus-visible {
  color: var(--c-text);
  border-color: rgba(255, 138, 61, 0.55);
  background: rgba(255, 138, 61, 0.1);
}

.page-about .about-toc .toc__link.is-current {
  color: var(--c-text);
  border-color: rgba(164, 107, 255, 0.6);
  background: rgba(164, 107, 255, 0.14);
}

.page-about .about-toc .toc__num {
  color: var(--c-accent-2);
  font-size: 12px;
}

/* --- 时间轴 --- */
.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .tl-item {
  position: relative;
  display: grid;
  grid-template-columns: var(--about-rail) minmax(0, 1fr);
  gap: 0 16px;
  padding-bottom: 26px;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: calc(var(--about-rail) / 2 - 0.5px);
  top: calc(var(--about-rail) + 4px);
  bottom: 2px;
  width: 1px;
  background: linear-gradient(180deg, rgba(164, 107, 255, 0.45), rgba(124, 143, 163, 0.14));
}

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

.page-about .tl-item:last-child::before {
  display: none;
}

.page-about .tl-item__no {
  width: var(--about-rail);
  height: var(--about-rail);
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--c-text-2);
  background: var(--c-surface);
  border: var(--line);
  transition: border-color 180ms var(--ease), color 180ms var(--ease), background 180ms var(--ease);
}

.page-about .tl-item:hover .tl-item__no,
.page-about .tl-item:focus-within .tl-item__no {
  border-color: var(--c-accent);
  color: var(--c-accent);
  background: rgba(255, 138, 61, 0.12);
}

.page-about .tl-item__body {
  min-width: 0;
  padding: 8px 14px 12px;
  margin: -6px -14px 0;
  border-radius: var(--radius-sm);
  border-left: 2px solid transparent;
  transition: background 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .tl-item:hover .tl-item__body {
  background: var(--about-glass);
  border-left-color: rgba(255, 138, 61, 0.7);
}

.page-about .tl-item__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.5;
  color: var(--c-text);
}

.page-about .tl-item__text {
  margin: 10px 0 0;
  color: var(--c-text-2);
  font-size: 16px;
  line-height: 1.85;
}

.page-about .tl-item__meta {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--c-accent-2);
}

/* --- 服务地区 --- */
.page-about .region {
  display: grid;
  gap: 24px;
}

.page-about .region__main h2 {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(24px, 5.4vw, 36px);
  line-height: 1.32;
  color: var(--c-text);
}

.page-about .region__main p {
  margin: 16px 0 0;
  color: var(--c-text-2);
  font-size: 16px;
  line-height: 1.85;
}

.page-about .region__main a {
  color: var(--c-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .region__aside {
  padding: 20px 18px;
}

.page-about .region__facts {
  margin: 0;
  display: grid;
  gap: 16px;
}

.page-about .region__row {
  display: grid;
  gap: 6px;
  padding-bottom: 14px;
  border-bottom: var(--line-soft);
}

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

.page-about .region__row dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-accent-2);
}

.page-about .region__row dd {
  margin: 0;
  color: var(--c-text);
  font-size: 15px;
  line-height: 1.7;
}

/* --- 团队 --- */
.page-about .team {
  display: grid;
  gap: 26px;
}

.page-about .team__figure {
  margin: 0;
}

.page-about .team__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .team-card {
  position: relative;
  padding: 6px;
  border-radius: var(--radius);
  background: var(--c-surface);
  border: var(--line);
  transition: transform 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .team-card:hover,
.page-about .team-card:focus-within {
  transform: translateY(-3px);
  border-color: rgba(255, 138, 61, 0.5);
}

.page-about .team-card__glass {
  padding: 18px 16px 20px;
  border-radius: var(--radius-sm);
  background: linear-gradient(150deg, rgba(27, 58, 85, 0.78), rgba(14, 42, 66, 0.42));
  border: var(--line-soft);
  backdrop-filter: blur(6px);
}

.page-about .team-card__no {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-online);
}

.page-about .team-card__title {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.5;
  color: var(--c-text);
}

.page-about .team-card__text {
  margin: 10px 0 0;
  color: var(--c-text-2);
  font-size: 15.5px;
  line-height: 1.85;
}

/* --- 迭代节奏 --- */
.page-about .cadence {
  display: grid;
  gap: 26px;
  padding: 26px 20px;
  border-radius: var(--radius);
  border: var(--line);
  background:
    radial-gradient(120% 140% at 0% 0%, rgba(164, 107, 255, 0.16), transparent 58%),
    var(--c-surface);
}

.page-about .cadence__text h2 {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(23px, 5.2vw, 34px);
  line-height: 1.34;
  color: var(--c-text);
}

.page-about .cadence__text p {
  margin: 16px 0 0;
  color: var(--c-text-2);
  font-size: 16px;
  line-height: 1.85;
}

.page-about .cadence__text a {
  color: var(--c-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .cadence__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-ink-soft);
  border: var(--line-soft);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.page-about .cadence-fact {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 18px 10px;
  background: rgba(7, 26, 43, 0.7);
  text-align: center;
}

.page-about .cadence-fact__num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 30px;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--c-text);
  transition: transform 180ms var(--ease), color 180ms var(--ease);
}

.page-about .cadence-fact:hover .cadence-fact__num {
  transform: scale(1.08);
  color: var(--c-online);
}

.page-about .cadence-fact__unit {
  font-size: 13px;
  line-height: 1.5;
  color: var(--c-text-2);
}

/* --- 常驻入口 --- */
.page-about .access {
  display: grid;
  gap: 24px;
}

.page-about .access__copy h2 {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(23px, 5.2vw, 34px);
  line-height: 1.34;
  color: var(--c-text);
}

.page-about .access__copy p {
  margin: 16px 0 0;
  color: var(--c-text-2);
  font-size: 16px;
  line-height: 1.85;
  max-width: 68ch;
}

.page-about .access__copy a {
  color: var(--c-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .access__figure {
  margin: 0;
  border-top: 2px solid rgba(35, 211, 192, 0.4);
}

/* --- 分类与生态 --- */
.page-about .partners__list {
  margin: 0 0 0;
}

.page-about .partners__list .index-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 4px 14px;
  padding: 14px 4px;
  border-bottom: var(--line-soft);
}

.page-about .partners__list .index-item__no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--c-accent-2);
}

.page-about .partners__list .index-item__title {
  color: var(--c-text);
  font-size: 16px;
  font-weight: 500;
  line-height: 1.6;
}

.page-about .partners__list .index-item__meta {
  grid-column: 2;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--c-text-2);
}

.page-about .partners__note {
  margin: 22px 0 0;
  padding-left: 14px;
  border-left: 2px solid rgba(35, 211, 192, 0.5);
  color: var(--c-text-2);
  font-size: 15px;
  line-height: 1.85;
}

.page-about .partners__note a {
  color: var(--c-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* --- 收尾 --- */
.page-about .about-cta {
  display: grid;
  gap: 22px;
  padding: 26px 20px;
}

.page-about .about-cta__text h2 {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(22px, 4.8vw, 30px);
  line-height: 1.36;
  color: var(--c-text);
}

.page-about .about-cta__text p {
  margin: 12px 0 0;
  color: var(--c-text-2);
  font-size: 16px;
  line-height: 1.8;
}

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

.page-about .about-cta__actions .btn {
  flex: 0 1 auto;
}

/* --- 平板及以上 --- */
@media (min-width: 720px) {
  .page-about {
    --about-rail: 54px;
  }

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

  .page-about .cadence {
    padding: 32px 28px;
  }

  .page-about .about-cta {
    padding: 32px 30px;
  }

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

  .page-about .team__list .team-card:nth-child(3) {
    grid-column: 1 / -1;
  }
}

/* --- 桌面 --- */
@media (min-width: 960px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: end;
    gap: 44px;
    padding: 26px 0 34px;
  }

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

  .page-about .tl-item {
    gap: 0 26px;
  }

  .page-about .region {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .team {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .team__list {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  .page-about .team__list .team-card:nth-child(3) {
    grid-column: auto;
  }

  .page-about .team__list .team-card:nth-child(2) {
    margin-left: 26px;
  }

  .page-about .team__list .team-card:nth-child(3) {
    margin-left: 52px;
  }

  .page-about .cadence {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: 44px;
    align-items: center;
  }

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

  .page-about .cadence-fact {
    flex-direction: row;
    justify-content: flex-start;
    gap: 14px;
    padding: 16px 18px;
    text-align: left;
  }

  .page-about .cadence-fact__num {
    min-width: 62px;
    font-size: 26px;
  }

  .page-about .access {
    grid-template-columns: minmax(0, 1fr);
    gap: 30px;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: center;
    gap: 34px;
  }

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

  .page-about .partners__list .index-item {
    grid-template-columns: 56px minmax(0, 1fr) minmax(0, 0.8fr);
    align-items: center;
    padding: 16px 6px;
  }

  .page-about .partners__list .index-item__meta {
    grid-column: 3;
    text-align: right;
  }
}

@media (min-width: 1200px) {
  .page-about .about-ridge svg {
    height: 92px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-figure__num,
  .page-about .cadence-fact__num,
  .page-about .team-card,
  .page-about .tl-item__no,
  .page-about .tl-item__body {
    transition: none;
  }

  .page-about .about-figure:hover .about-figure__num,
  .page-about .cadence-fact:hover .cadence-fact__num,
  .page-about .team-card:hover {
    transform: none;
  }
}