.page-about {
  --tl-gap: 56px;
  overflow-x: hidden;
}

/* ===== 品牌概览 Hero ===== */
.page-about .about-hero {
  position: relative;
  padding: 56px 0 104px;
  background: linear-gradient(135deg, var(--pitch-deep) 0%, var(--pitch) 62%, #10271f 100%);
  clip-path: polygon(0 0, 100% 0, 100% 94%, 0 100%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -80px;
  bottom: -20px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(0, 180, 216, 0.16) 0%, transparent 70%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 2;
  display: grid;
  gap: 48px;
}

.page-about .about-hero__kicker {
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--bright-gold);
  margin-bottom: 20px;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(40px, 8vw, 72px);
  line-height: 1.02;
  text-transform: uppercase;
  color: var(--white);
  margin: 0 0 24px;
}

.page-about .about-hero__title span {
  display: block;
  font-size: 0.52em;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--bright-gold);
  margin-top: 10px;
}

.page-about .about-hero__manifesto {
  font-family: var(--font-display);
  font-size: 24px;
  line-height: 1.3;
  letter-spacing: 0.04em;
  color: var(--gold);
  margin: 0 0 20px;
  padding-left: 16px;
  border-left: 3px solid var(--gold);
}

.page-about .about-hero__lead {
  max-width: 640px;
  font-size: 16px;
  line-height: 1.7;
  color: rgba(242, 239, 233, 0.82);
  margin: 0 0 32px;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.page-about .about-hero__side {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}

.page-about .about-hero__signboard svg {
  display: block;
  width: min(280px, 100%);
  height: auto;
}

.page-about .about-hero__side-note {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: rgba(242, 239, 233, 0.6);
  margin: 0;
}

/* ===== 时间轴 ===== */
.page-about .about-timeline {
  padding: 80px 0 72px;
}

.page-about .about-timeline__desc {
  max-width: 640px;
  font-size: 15px;
  line-height: 1.6;
  color: rgba(242, 239, 233, 0.7);
  margin: 16px 0 48px;
}

.page-about .timeline {
  position: relative;
  margin: 0 0 48px;
}

.page-about .timeline__list {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .timeline__list::before {
  content: "";
  position: absolute;
  left: 21px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: repeating-linear-gradient(
    to bottom,
    rgba(201, 162, 39, 0.35) 0px,
    rgba(201, 162, 39, 0.35) 6px,
    transparent 6px,
    transparent 10px
  );
}

.page-about .timeline__item {
  position: relative;
  margin-bottom: 40px;
  padding-left: 64px;
}

.page-about .timeline__badge {
  position: absolute;
  left: 0;
  top: 0;
  width: 44px;
  height: 44px;
  z-index: 2;
}

.page-about .timeline__badge svg {
  display: block;
  width: 44px;
  height: 44px;
}

.page-about .timeline__card {
  background: rgba(6, 29, 21, 0.72);
  border: 1px solid var(--border-gold);
  border-left: 3px solid var(--gold);
  padding: 20px 20px 22px;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.page-about .timeline__card:hover {
  transform: translateY(-3px);
  border-color: var(--bright-gold);
}

.page-about .timeline__meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.page-about .timeline__version {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.08em;
  color: var(--bright-gold);
}

.page-about .timeline__year {
  font-family: var(--font-data);
  font-size: 13px;
  text-transform: uppercase;
  color: var(--teal);
}

.page-about .timeline__title {
  font-family: var(--font-body);
  font-size: 20px;
  font-weight: 600;
  color: var(--white);
  margin: 0 0 10px;
}

.page-about .timeline__text {
  font-size: 14px;
  line-height: 1.65;
  color: rgba(242, 239, 233, 0.75);
  margin: 0;
}

.page-about .timeline__item--media {
  padding-left: 0;
  margin: 48px 0;
}

.page-about .timeline__media {
  margin: 0;
  border: 1px solid var(--border-gold);
  background: var(--graphite);
}

.page-about .timeline__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .timeline__media-label {
  padding: 12px 16px;
  font-family: var(--font-data);
  font-size: 13px;
  color: rgba(242, 239, 233, 0.7);
  background: var(--graphite);
}

.page-about .about-timeline__foot {
  border-top: 1px solid var(--border-gold);
  padding-top: 24px;
  font-size: 14px;
  color: rgba(242, 239, 233, 0.7);
}

.page-about .about-timeline__link {
  color: var(--bright-gold);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ===== 使命 ===== */
.page-about .about-mission {
  padding: 80px 0 88px;
}

.page-about .about-mission__grid {
  display: grid;
  gap: 20px;
  margin-top: 44px;
}

.page-about .about-mission__pillar {
  background: #0d0d0d;
  border-top: 3px solid var(--gold);
  padding: 28px 24px;
  transition: transform 0.3s ease;
}

.page-about .about-mission__pillar:hover {
  transform: translateY(-4px);
}

.page-about .about-mission__num {
  display: block;
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--bright-gold);
  margin-bottom: 14px;
}

.page-about .about-mission__title {
  font-family: var(--font-display);
  font-size: 24px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--white);
  margin: 0 0 12px;
}

.page-about .about-mission__text {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(242, 239, 233, 0.72);
  margin: 0;
}

/* ===== 服务规模 ===== */
.page-about .about-scale {
  padding: 80px 0 88px;
}

.page-about .about-scale__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 44px;
}

.page-about .about-scale__stat {
  position: relative;
  background: var(--white);
  border: 1px solid rgba(26, 26, 26, 0.14);
  padding: 24px 20px;
}

.page-about .about-scale__stat::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 28px;
  height: 3px;
  background: var(--gold);
}

.page-about .about-scale__value {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 38px;
  line-height: 1;
  color: var(--pitch);
}

.page-about .about-scale__unit {
  font-size: 0.5em;
  color: var(--gold);
  margin-left: 2px;
}

.page-about .about-scale__label {
  display: block;
  font-size: 13px;
  line-height: 1.4;
  color: var(--graphite);
  margin-top: 10px;
}

.page-about .about-scale__note {
  margin-top: 32px;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(26, 26, 26, 0.72);
  border-left: 3px solid var(--gold);
  padding-left: 16px;
}

/* ===== 团队与生态 ===== */
.page-about .about-team {
  padding: 80px 0 88px;
}

.page-about .about-team__grid {
  display: grid;
  gap: 32px;
  margin-top: 44px;
}

.page-about .about-team__lead {
  font-size: 18px;
  font-weight: 500;
  line-height: 1.7;
  color: var(--bright-gold);
  margin: 0 0 24px;
}

.page-about .about-team__list {
  list-style: none;
  margin: 0 0 32px;
  padding: 0;
}

.page-about .about-team__role {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  border-bottom: 1px solid rgba(242, 239, 233, 0.14);
  padding: 14px 0;
}

.page-about .about-team__role-num {
  font-family: var(--font-data);
  font-size: 18px;
  color: var(--gold);
  flex-shrink: 0;
}

.page-about .about-team__role-label {
  font-size: 14px;
  color: rgba(242, 239, 233, 0.8);
  text-align: right;
}

.page-about .about-team__media {
  margin: 0;
  border: 1px solid var(--border-gold);
  background: var(--graphite);
}

.page-about .about-team__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-team__media-label {
  padding: 12px 16px;
  font-family: var(--font-data);
  font-size: 13px;
  color: rgba(242, 239, 233, 0.7);
  background: var(--graphite);
}

.page-about .about-team__ecosystem {
  margin-top: 48px;
  border-top: 2px solid var(--border-gold);
  padding-top: 40px;
}

.page-about .about-team__ecosystem-title {
  font-family: var(--font-display);
  font-size: 26px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--white);
  margin: 0 0 28px;
}

.page-about .about-team__ecosystem-list {
  display: grid;
  gap: 20px;
}

.page-about .about-team__ecosystem-item {
  background: rgba(6, 29, 21, 0.5);
  border-left: 3px solid var(--lawn);
  padding: 20px;
}

.page-about .about-team__ecosystem-index {
  display: block;
  font-family: var(--font-display);
  font-size: 20px;
  color: var(--teal);
  margin-bottom: 8px;
}

.page-about .about-team__ecosystem-item h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--white);
  margin: 0 0 8px;
}

.page-about .about-team__ecosystem-item p {
  font-size: 14px;
  line-height: 1.6;
  color: rgba(242, 239, 233, 0.7);
  margin: 0;
}

/* ===== 资质与荣誉 ===== */
.page-about .about-honors {
  padding: 80px 0 72px;
}

.page-about .about-honors__grid {
  display: grid;
  gap: 20px;
  margin-top: 44px;
}

.page-about .about-honors__item {
  background: rgba(242, 239, 233, 0.06);
  border: 1px solid var(--border-gold);
  padding: 28px 24px;
  transition: background 0.3s ease, border-color 0.3s ease;
}

.page-about .about-honors__item:hover {
  background: rgba(242, 239, 233, 0.1);
  border-color: var(--bright-gold);
}

.page-about .about-honors__badge {
  display: inline-block;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--pitch);
  background: var(--gold);
  padding: 4px 10px;
  margin-bottom: 16px;
}

.page-about .about-honors__name {
  font-size: 18px;
  font-weight: 600;
  color: var(--white);
  margin: 0 0 10px;
}

.page-about .about-honors__desc {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(242, 239, 233, 0.7);
  margin: 0;
}

.page-about .about-honors__media {
  margin: 48px 0 0;
  max-width: 400px;
}

.page-about .about-honors__media img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--border-gold);
}

.page-about .about-honors__media-label {
  padding: 10px 4px 0;
  font-family: var(--font-data);
  font-size: 13px;
  color: rgba(242, 239, 233, 0.6);
}

/* ===== 页尾CTA ===== */
.page-about .about-cta {
  padding: 72px 0 88px;
}

.page-about .about-cta__box {
  background: linear-gradient(135deg, rgba(0, 180, 216, 0.08), rgba(123, 45, 139, 0.05));
  border: 1px solid var(--border-gold);
  padding: 40px 24px;
}

.page-about .about-cta__kicker {
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--teal);
  margin: 0 0 12px;
}

.page-about .about-cta__title {
  font-family: var(--font-display);
  font-size: 38px;
  text-transform: uppercase;
  color: var(--white);
  margin: 0 0 14px;
}

.page-about .about-cta__text {
  max-width: 640px;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(242, 239, 233, 0.75);
  margin: 0 0 24px;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

/* ===== 桌面端增强 ===== */
@media (min-width: 768px) {
  .page-about .about-scale__grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .page-about .about-team__grid {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }

  .page-about .about-team__ecosystem-list {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

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

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 120px 0 140px;
  }

  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1fr) 320px;
    align-items: center;
  }

  .page-about .about-hero__side {
    justify-content: center;
    align-items: center;
    border-left: 1px solid var(--border-gold);
    padding-left: 32px;
  }

  .page-about .timeline__list::before {
    left: 50%;
    transform: translateX(-1px);
  }

  .page-about .timeline__item {
    width: calc(50% - var(--tl-gap));
    padding-left: 0;
  }

  .page-about .timeline__item--left {
    margin-right: auto;
  }

  .page-about .timeline__item--left .timeline__badge {
    left: auto;
    right: calc(-1 * (var(--tl-gap) + 22px));
  }

  .page-about .timeline__item--right {
    margin-left: auto;
  }

  .page-about .timeline__item--right .timeline__badge {
    left: calc(-1 * (var(--tl-gap) + 22px));
  }

  .page-about .timeline__item--media {
    width: 100%;
    max-width: 720px;
    margin: 56px auto;
  }

  .page-about .about-timeline__desc {
    max-width: 720px;
  }
}