/* ===== 品牌概况页专属样式 ===== */
.page-about {
  background: var(--c-dark);
  color: var(--c-cloud);
  min-width: 0;
}

/* 面包屑 */
.page-about .breadcrumbs {
  padding-top: 1.75rem;
}
.page-about .breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .breadcrumbs__item {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--c-slate);
}
.page-about .breadcrumbs__item + .breadcrumbs__item::before {
  content: '/';
  margin-right: 0.5rem;
  color: var(--c-slate);
}
.page-about .breadcrumbs__item a {
  color: var(--c-slate);
  text-decoration: none;
  transition: color 0.25s var(--ease);
}
.page-about .breadcrumbs__item a:hover {
  color: var(--c-green);
}
.page-about .breadcrumbs__item[aria-current='page'] {
  color: var(--c-cloud);
}

/* ===== Hero ===== */
.page-about .about-hero {
  position: relative;
  padding: 2rem 0 4rem;
  background:
    linear-gradient(120deg, rgba(13, 27, 62, 0.92), rgba(10, 20, 40, 0.98)),
    repeating-linear-gradient(90deg, transparent 0 79px, rgba(122, 139, 166, 0.07) 80px);
}
.page-about .about-hero__grid {
  display: grid;
  gap: 2rem;
}
.page-about .about-hero__main {
  min-width: 0;
}
.page-about .about-hero__kicker {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-green);
  margin-bottom: 1rem;
}
.page-about .about-hero__title {
  font-size: clamp(2.375rem, 10vw, 5rem);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.03em;
  color: var(--c-cloud);
  margin: 0 0 1.5rem;
  max-width: 12ch;
}
.page-about .about-hero__desc {
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--c-slate);
  max-width: 36rem;
  margin: 0 0 2rem;
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.page-about .about-hero__meta {
  border-top: 1px solid rgba(57, 255, 136, 0.4);
  border-bottom: 1px solid rgba(57, 255, 136, 0.4);
  padding: 1.25rem 0;
}
.page-about .about-hero__meta dl {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem 1rem;
  margin: 0;
}
.page-about .about-hero__metric .meta-key {
  display: block;
  font-size: 0.75rem;
  color: var(--c-slate);
  margin-bottom: 0.35rem;
}
.page-about .about-hero__value {
  font-size: 1.625rem;
  font-weight: 800;
  color: var(--c-cloud);
  letter-spacing: -0.02em;
}
.page-about .about-hero__figure {
  margin: 0;
  border: 1px solid rgba(122, 139, 166, 0.18);
  background: rgba(13, 27, 62, 0.5);
}
.page-about .about-hero__figure-media {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  position: relative;
}
.page-about .about-hero__figure-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.page-about .about-hero__figure-label {
  padding: 0.75rem 1rem;
  font-size: 0.8125rem;
  color: var(--c-slate);
  font-family: var(--font-mono);
  border-top: 1px solid rgba(122, 139, 166, 0.14);
}

/* ===== 章节编号 ===== */
.page-about .section-no {
  font-family: var(--font-mono);
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1;
  color: var(--c-slate);
  display: inline-block;
  letter-spacing: -0.03em;
  position: relative;
}
.page-about .section-no::after {
  content: '';
  display: inline-block;
  width: 28px;
  height: 4px;
  margin-left: 0.75rem;
  background: var(--c-orange);
  clip-path: polygon(0 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
  vertical-align: middle;
}

/* ===== 01 使命 ===== */
.page-about .about-mission {
  padding: 4.5rem 0;
  border-bottom: var(--border-soft);
}
.page-about .about-mission__inner {
  display: grid;
  gap: 2.25rem;
}
.page-about .about-mission__rail {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
}
.page-about .about-mission__rail .meta-key {
  color: var(--c-slate);
  font-size: 0.8125rem;
  letter-spacing: 0.14em;
}
.page-about .about-mission__title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--c-cloud);
  margin: 1.25rem 0 1.5rem;
}
.page-about .about-mission__body p {
  color: var(--c-slate);
  font-size: 1.0625rem;
  line-height: 1.75;
  margin: 0 0 1rem;
}
.page-about .about-mission__points {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  border-top: var(--border-soft);
}
.page-about .about-mission__point {
  display: flex;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: var(--border-soft);
  align-items: flex-start;
}
.page-about .about-mission__point-no {
  color: var(--c-orange);
  font-weight: 700;
  flex-shrink: 0;
}
.page-about .about-mission__point p {
  margin: 0;
  color: var(--c-cloud);
  font-size: 0.9375rem;
  line-height: 1.6;
}

/* ===== 02 发展历程 ===== */
.page-about .about-journey {
  padding: 4.5rem 0;
  background: linear-gradient(180deg, var(--c-deeper), var(--c-dark));
}
.page-about .about-journey__head {
  margin-bottom: 2.75rem;
}
.page-about .about-journey__heading .section-no {
  font-size: 2.5rem;
}
.page-about .about-journey__title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--c-cloud);
  margin: 1rem 0 0;
}
.page-about .about-journey__summary {
  color: var(--c-slate);
  font-size: 1.0625rem;
  line-height: 1.7;
  max-width: 40rem;
  margin: 1.25rem 0 0;
}
.page-about .about-journey__timeline {
  list-style: none;
  margin: 0;
  padding-left: 2.5rem;
  position: relative;
}
.page-about .about-journey__timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.25rem;
  bottom: 0.25rem;
  width: 1px;
  background: linear-gradient(180deg, var(--c-green), rgba(122, 139, 166, 0.25));
}
.page-about .about-journey__item {
  position: relative;
  padding: 0 0 2.75rem;
}
.page-about .about-journey__item:last-child {
  padding-bottom: 0;
}
.page-about .about-journey__dot {
  position: absolute;
  left: calc(-2.5rem - 6px);
  top: 0.3rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--c-green);
  border: 3px solid var(--c-dark);
  box-shadow: 0 0 0 1px var(--c-green), 0 0 16px rgba(57, 255, 136, 0.4);
  transition: transform 0.25s var(--ease);
}
.page-about .about-journey__item:hover .about-journey__dot {
  transform: scale(1.25);
}
.page-about .about-journey__item--current .about-journey__dot {
  background: var(--c-orange);
  box-shadow: 0 0 0 1px var(--c-orange), 0 0 16px rgba(255, 107, 53, 0.45);
}
.page-about .about-journey__item--current .about-journey__phase {
  color: var(--c-green);
}
.page-about .about-journey__phase {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-orange);
  margin-bottom: 0.75rem;
}
.page-about .about-journey__content h3 {
  color: var(--c-cloud);
  font-size: 1.25rem;
  font-weight: 800;
  margin: 0 0 0.5rem;
}
.page-about .about-journey__content p {
  color: var(--c-slate);
  font-size: 1rem;
  line-height: 1.7;
  margin: 0;
  max-width: 36rem;
}

/* ===== 03 数据覆盖 ===== */
.page-about .about-coverage {
  position: relative;
  overflow: hidden;
  padding: 5rem 0;
  background: var(--c-navy);
}
.page-about .about-coverage__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.page-about .about-coverage__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: 0.3;
}
.page-about .about-coverage__content {
  position: relative;
  z-index: 1;
}
.page-about .about-coverage__content .section-no {
  color: var(--c-orange);
}
.page-about .about-coverage__title {
  font-size: clamp(2.25rem, 6vw, 4rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--c-cloud);
  margin: 0.75rem 0 2.5rem;
  max-width: 14ch;
}
.page-about .about-coverage__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: rgba(122, 139, 166, 0.16);
  border: 1px solid rgba(122, 139, 166, 0.16);
  margin-bottom: 2.5rem;
}
.page-about .about-coverage__stat {
  background: rgba(10, 20, 40, 0.78);
  padding: 1.75rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.page-about .about-coverage__num {
  font-size: clamp(1.875rem, 5vw, 3rem);
  font-weight: 800;
  color: var(--c-cloud);
  line-height: 1;
}
.page-about .about-coverage__stat:nth-child(2) .about-coverage__num,
.page-about .about-coverage__stat:nth-child(3) .about-coverage__num {
  color: var(--c-green);
}
.page-about .about-coverage__stat:nth-child(4) .about-coverage__num {
  color: var(--c-orange);
}
.page-about .about-coverage__label {
  color: var(--c-slate);
  font-size: 0.875rem;
}
.page-about .about-coverage__table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.page-about .about-coverage__table {
  width: 100%;
  min-width: 460px;
  border-collapse: collapse;
  background: rgba(10, 20, 40, 0.66);
  font-size: 0.9375rem;
}
.page-about .about-coverage__table-cap {
  text-align: left;
  font-size: 0.8125rem;
  color: var(--c-slate);
  padding: 0 0 0.75rem;
  caption-side: top;
}
.page-about .about-coverage__table th,
.page-about .about-coverage__table td {
  padding: 1rem 1.25rem;
  text-align: left;
  border-bottom: var(--border-soft);
}
.page-about .about-coverage__table th {
  color: var(--c-green);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  background: rgba(13, 27, 62, 0.78);
}
.page-about .about-coverage__table td {
  color: var(--c-cloud);
}
.page-about .about-coverage__table td:first-child {
  color: var(--c-gold);
  font-weight: 700;
}

/* ===== 04 安全同步 ===== */
.page-about .about-security {
  padding: 5rem 0;
  border-top: var(--border-soft);
}
.page-about .about-security__grid {
  display: grid;
  gap: 2.5rem;
}
.page-about .about-security__content .section-no {
  color: var(--c-green);
}
.page-about .about-security__title {
  font-size: clamp(2.125rem, 5vw, 3.5rem);
  font-weight: 900;
  line-height: 1.1;
  color: var(--c-cloud);
  margin: 0.75rem 0 1.25rem;
  letter-spacing: -0.02em;
}
.page-about .about-security__desc {
  color: var(--c-slate);
  max-width: 40rem;
  font-size: 1.0625rem;
  line-height: 1.75;
  margin-bottom: 2rem;
}
.page-about .about-security__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--border-soft);
}
.page-about .about-security__item {
  display: flex;
  gap: 1.25rem;
  padding: 1.5rem 0;
  border-bottom: var(--border-soft);
}
.page-about .about-security__key {
  color: var(--c-orange);
  font-weight: 700;
  flex-shrink: 0;
}
.page-about .about-security__item h3 {
  color: var(--c-cloud);
  font-size: 1.125rem;
  font-weight: 700;
  margin: 0 0 0.375rem;
}
.page-about .about-security__item p {
  color: var(--c-slate);
  font-size: 0.9375rem;
  line-height: 1.6;
  margin: 0;
}
.page-about .about-security__figure {
  margin: 0;
  border: 1px solid rgba(122, 139, 166, 0.18);
  background: rgba(13, 27, 62, 0.5);
}
.page-about .about-security__figure-media {
  aspect-ratio: 7 / 5;
  overflow: hidden;
  position: relative;
  background: rgba(13, 27, 62, 0.5);
}
.page-about .about-security__figure-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.page-about .about-security__figure-label {
  padding: 0.75rem 1rem;
  font-size: 0.8125rem;
  color: var(--c-slate);
  font-family: var(--font-mono);
  border-top: 1px solid rgba(122, 139, 166, 0.14);
}

/* ===== 05 团队构成 ===== */
.page-about .about-team {
  padding: 5rem 0;
  background: linear-gradient(180deg, var(--c-dark), rgba(13, 27, 62, 0.5));
  border-top: var(--border-soft);
}
.page-about .about-team__head {
  max-width: 44rem;
  margin-bottom: 2.5rem;
}
.page-about .about-team__head .section-no {
  color: var(--c-orange);
}
.page-about .about-team__title {
  font-size: clamp(2.125rem, 5vw, 3.5rem);
  font-weight: 900;
  line-height: 1.12;
  color: var(--c-cloud);
  margin: 0.75rem 0 1rem;
  letter-spacing: -0.02em;
}
.page-about .about-team__intro {
  color: var(--c-slate);
  font-size: 1.0625rem;
  line-height: 1.7;
}
.page-about .about-team__grid {
  display: grid;
  gap: 1.25rem;
}
.page-about .about-team__card {
  background: rgba(13, 27, 62, 0.55);
  border: var(--border-soft);
  border-top: 3px solid var(--c-green);
  padding: 1.75rem 1.5rem;
  position: relative;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.page-about .about-team__card:nth-child(2) {
  border-top-color: var(--c-orange);
}
.page-about .about-team__card:nth-child(3) {
  border-top-color: var(--c-cyan);
}
.page-about .about-team__card:nth-child(4) {
  border-top-color: var(--c-gold);
}
.page-about .about-team__card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
}
.page-about .about-team__count {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  color: var(--c-cloud);
  margin-bottom: 0.5rem;
}
.page-about .about-team__card h3 {
  color: var(--c-cloud);
  font-size: 1.125rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
}
.page-about .about-team__card p {
  color: var(--c-slate);
  font-size: 0.9375rem;
  line-height: 1.6;
  margin: 0;
}

/* ===== 信任与底部提示 ===== */
.page-about .about-trust {
  padding: 3.5rem 0 5rem;
  border-top: var(--border-soft);
}
.page-about .about-trust__inner {
  display: grid;
  gap: 2rem;
}
.page-about .about-trust__text {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.25rem;
  align-items: start;
}
.page-about .about-trust__text .meta-key {
  color: var(--c-green);
  font-size: 0.8125rem;
  padding-top: 0.3rem;
  letter-spacing: 0.14em;
}
.page-about .about-trust__text p {
  margin: 0;
  color: var(--c-slate);
  font-size: 0.9375rem;
  line-height: 1.7;
  max-width: 36rem;
}
.page-about .about-trust__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ===== 平板端 ===== */
@media (min-width: 768px) {
  .page-about .about-hero__meta dl {
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
  }

  .page-about .about-mission__content {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 2.5rem 3rem;
    align-items: start;
  }
  .page-about .about-mission__title {
    grid-column: 1;
    margin-top: 0;
  }
  .page-about .about-mission__body {
    grid-column: 2;
  }
  .page-about .about-mission__points {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    border-top: var(--border-soft);
    padding-top: 1.5rem;
  }
  .page-about .about-mission__point {
    display: block;
    border-top: 2px solid var(--c-orange);
    border-bottom: 0;
    padding: 1rem 0 0;
  }
  .page-about .about-mission__point-no {
    display: block;
    margin-bottom: 0.5rem;
  }

  .page-about .about-journey__head {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: 2rem;
    align-items: end;
    margin-bottom: 3rem;
  }
  .page-about .about-journey__item {
    display: grid;
    grid-template-columns: 200px minmax(0, 1fr);
    column-gap: 2rem;
    align-items: baseline;
  }
  .page-about .about-journey__phase {
    text-align: right;
    margin-bottom: 0;
  }

  .page-about .about-coverage__stats {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about .about-coverage__title {
    max-width: 16ch;
  }

  .page-about .about-team__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }
  .page-about .about-team__card {
    padding: 2rem 2.25rem;
  }

  .page-about .about-trust__inner {
    grid-template-columns: 1fr auto;
    align-items: center;
  }
}

/* ===== 桌面端 ===== */
@media (min-width: 1024px) {
  .page-about .about-hero {
    padding: 3rem 0 5rem;
  }
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1fr) 260px;
    column-gap: 2.5rem;
    align-items: start;
  }
  .page-about .about-hero__main {
    grid-column: 1;
    grid-row: 1;
  }
  .page-about .about-hero__meta {
    grid-column: 2;
    grid-row: 1;
    border: none;
    border-left: 1px solid rgba(57, 255, 136, 0.35);
    padding-left: 1.5rem;
    align-self: stretch;
  }
  .page-about .about-hero__meta dl {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .page-about .about-hero__figure {
    grid-column: 1 / -1;
    grid-row: 2;
  }
  .page-about .about-hero__title {
    font-size: clamp(3rem, 7vw, 5.25rem);
    max-width: 12ch;
  }
  .page-about .about-hero__desc {
    max-width: 44rem;
  }

  .page-about .about-mission {
    padding: 5.5rem 0;
  }
  .page-about .about-mission__inner {
    grid-template-columns: 170px minmax(0, 1fr);
    gap: 3.5rem;
  }
  .page-about .about-mission__rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
    border-right: 1px solid rgba(122, 139, 166, 0.16);
    padding-right: 1.5rem;
  }

  .page-about .about-security__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 4rem;
    align-items: center;
  }
}