.page-about {
  --about-hero-line: rgba(212, 175, 55, 0.28);
  background: var(--cream);
  overflow-x: hidden;
}

/* ===== 品牌页首屏 ===== */
.page-about .about-hero {
  position: relative;
  background: radial-gradient(1200px 600px at 80% -20%, var(--green-700) 0%, var(--green-900) 55%, #062B20 100%);
  color: var(--white);
  padding: clamp(28px, 5vw, 64px) 0 56px;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  width: 460px;
  height: 460px;
  border: 2px solid var(--about-hero-line);
  border-radius: 50%;
  left: -160px;
  bottom: -260px;
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  width: 160%;
  height: 1px;
  background: var(--about-hero-line);
  left: -30%;
  top: 56%;
  transform: rotate(-18deg);
  pointer-events: none;
}

.page-about .about-hero .container {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .breadcrumb {
  margin-bottom: 28px;
}

.page-about .about-hero .breadcrumb__link,
.page-about .about-hero .breadcrumb__current {
  color: rgba(255, 255, 255, 0.85);
}

.page-about .about-hero .breadcrumb__item {
  color: var(--gold-light);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 28px;
  align-items: center;
}

.page-about .about-hero__index {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--gold-light);
  text-transform: uppercase;
  border-left: 3px solid var(--gold);
  padding-left: 12px;
}

.page-about .about-hero__index-num {
  color: var(--gold);
  font-size: 15px;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-size: clamp(34px, 6vw, 64px);
  line-height: 1.08;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  margin: 16px 0 18px;
  color: var(--white);
  max-width: 18em;
}

.page-about .about-hero__title small {
  display: block;
  font-family: var(--font-body);
  font-size: 0.34em;
  font-weight: 300;
  letter-spacing: 0.1em;
  text-transform: none;
  color: var(--gold-light);
  margin-top: 10px;
  border-top: 1px solid rgba(212, 175, 55, 0.4);
  padding-top: 12px;
  max-width: 28em;
}

.page-about .about-hero__lead {
  font-size: 17px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.78);
  max-width: 54em;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-hero .btn--ghost {
  border-color: rgba(255, 255, 255, 0.6);
  color: var(--white);
  background: transparent;
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  margin: 0;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 22px 100%, 0 calc(100% - 22px));
  padding: 20px 18px;
  gap: 12px 16px;
}

.page-about .about-facts__row {
  padding: 10px 0 10px 14px;
  border-left: 2px solid var(--gold);
}

.page-about .about-facts dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: rgba(245, 240, 235, 0.65);
  margin-bottom: 4px;
  text-transform: uppercase;
}

.page-about .about-facts dd {
  margin: 0;
  font-family: var(--font-display);
  font-size: 30px;
  line-height: 1.1;
  color: var(--gold);
}

/* ===== 左右分屏与侧边索引 ===== */
.page-about .about-layout {
  padding-top: 48px;
  padding-bottom: 80px;
  display: grid;
  gap: 40px;
}

.page-about .about-aside__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--terracotta);
  border-bottom: 1px solid rgba(157, 166, 160, 0.45);
  padding-bottom: 10px;
  margin-bottom: 12px;
}

.page-about .about-nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  scrollbar-width: thin;
}

.page-about .about-nav__link {
  flex: 0 0 auto;
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--green-900);
  background: var(--white);
  border: 1px solid rgba(11, 61, 46, 0.18);
  padding: 8px 12px;
  clip-path: polygon(0 0, calc(100% - 9px) 0, 100% 9px, 100% 100%, 9px 100%, 0 calc(100% - 9px));
}

.page-about .about-nav__link span {
  color: var(--gold);
  margin-right: 4px;
}

.page-about .about-aside__note {
  display: none;
}

.page-about .about-content {
  min-width: 0;
  background: var(--white);
  padding: 12px clamp(18px, 3vw, 36px) 48px;
  clip-path: polygon(0 0, calc(100% - 28px) 0, 100% 28px, 100% 100%, 0 100%);
}

/* ===== 章节通用 ===== */
.page-about .about-section {
  padding: 24px 0 48px;
  border-left: 3px solid var(--gold-light);
  padding-left: 24px;
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-about .about-section + .about-section {
  margin-top: 40px;
  border-top: 1px dashed rgba(157, 166, 160, 0.55);
  padding-top: 48px;
}

.page-about .about-section__title {
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.2;
  letter-spacing: 0.02em;
  color: var(--green-900);
  margin: 10px 0 0;
  text-transform: uppercase;
}

/* ===== 品牌故事 ===== */
.page-about .about-story__grid {
  display: grid;
  gap: 24px;
  margin-top: 24px;
}

.page-about .about-story__text p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--gray-700);
}

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

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

.page-about .about-story__figure img {
  width: 100%;
  max-width: 100%;
  height: auto;
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
}

.page-about .about-story__figure figcaption {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--rock);
  margin-top: 6px;
  padding-left: 12px;
  border-left: 2px solid var(--terracotta);
}

.page-about .about-story__mission {
  margin-top: 24px;
  border-top: 1px solid rgba(157, 166, 160, 0.4);
  padding-top: 20px;
  display: flex;
  gap: 18px;
  align-items: flex-start;
}

.page-about .about-story__mission-label {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--terracotta);
  letter-spacing: 0.08em;
  white-space: nowrap;
  border: 1px solid rgba(179, 92, 55, 0.4);
  padding: 4px 8px;
}

.page-about .about-story__mission p {
  margin: 0;
  font-size: 17px;
  line-height: 1.7;
  color: var(--gray-900);
}

.page-about .about-story__quote {
  margin: 28px 0 0;
  padding: 20px 22px;
  background: var(--green-900);
  color: var(--white);
  position: relative;
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
}

.page-about .about-story__quote p {
  margin: 0 0 8px;
  font-size: 18px;
  line-height: 1.6;
  color: var(--cream);
}

.page-about .about-story__quote footer {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gold-light);
  letter-spacing: 0.06em;
}

/* ===== 发展历程时间轴 ===== */
.page-about .timeline {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
}

.page-about .timeline__item {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 20px;
  position: relative;
  padding-bottom: 32px;
}

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

.page-about .timeline__item:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 32px;
  top: 84px;
  width: 52px;
  height: 4px;
  background: var(--gold);
  transform: rotate(16deg);
  transform-origin: left center;
  border-radius: 999px;
}

.page-about .timeline__year {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 28px;
  line-height: 1.2;
  padding: 4px 14px 4px 18px;
  color: var(--green-900);
  background: var(--gold);
  clip-path: polygon(0 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
  transform: skewX(-10deg);
  transform-origin: left bottom;
  text-align: center;
}

.page-about .timeline__phase {
  display: block;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--rock);
  letter-spacing: 0.08em;
}

.page-about .timeline__phase::before {
  content: "// ";
  color: var(--gold);
  font-weight: 700;
}

.page-about .timeline__body {
  background: var(--cream);
  padding: 20px 22px;
  position: relative;
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
}

.page-about .timeline__body::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 24px;
  width: 24px;
  height: 2px;
  background: var(--gold-light);
}

.page-about .timeline__body h3 {
  font-family: var(--font-display);
  font-size: 20px;
  letter-spacing: 0.02em;
  margin: 0 0 8px;
  color: var(--green-900);
}

.page-about .timeline__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.65;
  color: var(--gray-700);
}

/* ===== 数据概览 ===== */
.page-about .about-stats__panel {
  background: var(--green-900);
  color: var(--white);
  padding: 26px 22px;
  margin-top: 24px;
  clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 24px 100%, 0 calc(100% - 24px));
}

.page-about .about-stats__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.page-about .about-stat {
  padding: 12px 6px 12px 14px;
  border-left: 3px solid var(--gold);
  background: rgba(255, 255, 255, 0.05);
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(32px, 6vw, 52px);
  line-height: 1;
  color: var(--gold);
}

.page-about .about-stat__unit {
  font-family: var(--font-display);
  font-size: 22px;
  color: var(--gold-light);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  letter-spacing: 0.06em;
}

.page-about .about-stats__figure {
  margin: 22px 0 0;
}

.page-about .about-stats__figure img {
  width: 100%;
  max-width: 100%;
  height: auto;
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}

.page-about .about-stats__note {
  margin: 22px 0 0;
  background: var(--cream);
  border-left: 3px solid var(--terracotta);
  padding: 16px 18px;
  font-size: 15px;
  line-height: 1.65;
  color: var(--gray-700);
}

/* ===== 团队与资质 ===== */
.page-about .about-team__card {
  background: var(--cream);
  padding: 24px 20px;
  margin-top: 24px;
  display: grid;
  gap: 20px;
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
}

.page-about .about-team__text p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--gray-700);
}

.page-about .about-team__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.page-about .about-team__stats li {
  background: var(--white);
  padding: 14px;
  border-bottom: 2px solid var(--gold);
  font-size: 14px;
  color: var(--gray-700);
}

.page-about .about-team__stats li span {
  display: block;
  font-family: var(--font-display);
  font-size: 34px;
  color: var(--green-900);
  line-height: 1;
}

.page-about .about-team__media img {
  width: 100%;
  max-width: 100%;
  height: auto;
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
}

.page-about .about-team__badges {
  margin-top: 28px;
}

.page-about .about-team__badges h3 {
  font-family: var(--font-display);
  font-size: 18px;
  color: var(--green-900);
  border-bottom: 2px solid var(--gold);
  display: inline-block;
  padding-bottom: 4px;
  margin: 0 0 16px;
}

.page-about .about-badges {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-badge {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  background: var(--white);
  border: 1px solid rgba(157, 166, 160, 0.4);
  padding: 16px;
}

.page-about .about-badge__icon {
  width: 34px;
  height: 34px;
  flex: 0 0 34px;
  display: grid;
  place-items: center;
  background: var(--green-900);
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 14px;
}

.page-about .about-badge__icon::before {
  content: "//";
}

.page-about .about-badge strong {
  display: block;
  color: var(--green-900);
  font-size: 16px;
  margin-bottom: 4px;
}

.page-about .about-badge p {
  margin: 0;
  font-size: 13px;
  color: var(--rock);
  line-height: 1.5;
}

/* ===== 合作生态 ===== */
.page-about .about-ecosystem__grid {
  margin-top: 24px;
  display: grid;
  gap: 14px;
}

.page-about .about-partner {
  background: var(--white);
  border-left: 4px solid var(--green-900);
  padding: 22px 20px;
  position: relative;
  box-shadow: inset 0 0 0 1px rgba(157, 166, 160, 0.2);
}

.page-about .about-partner::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 52px;
  height: 52px;
  background: linear-gradient(225deg, var(--green-900) 0%, var(--green-900) 48%, transparent 50%);
}

.page-about .about-partner__index {
  position: absolute;
  top: 8px;
  right: 6px;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--gold);
  letter-spacing: 0.06em;
}

.page-about .about-partner h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 19px;
  color: var(--green-900);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.page-about .about-partner p {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--gray-700);
}

.page-about .about-partner a {
  display: inline-block;
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--terracotta);
  border-bottom: 1px solid var(--terracotta);
  padding-bottom: 2px;
}

.page-about .about-partner a:hover {
  color: var(--green-900);
  border-color: var(--green-900);
}

.page-about .about-ecosystem__contact {
  margin-top: 28px;
  background: var(--green-900);
  padding: 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 0 100%);
}

.page-about .about-ecosystem__contact p {
  margin: 0;
  color: var(--white);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

/* ===== 响应式 ===== */
@media (min-width: 760px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 48px;
  }

  .page-about .about-story__grid {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
  }

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

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

  .page-about .about-team__text {
    grid-column: 1 / 2;
  }

  .page-about .about-team__stats {
    grid-column: 1 / 2;
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .about-team__media {
    grid-row: 1 / 3;
    grid-column: 2 / 3;
  }

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

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

@media (min-width: 1024px) {
  .page-about .about-layout {
    grid-template-columns: 220px 1fr;
    gap: clamp(40px, 5vw, 80px);
  }

  .page-about .about-aside__inner {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    padding-left: 18px;
  }

  .page-about .about-aside__note {
    display: block;
    margin-top: 28px;
    padding-top: 18px;
    border-top: 1px dashed rgba(157, 166, 160, 0.6);
    font-size: 13px;
  }

  .page-about .about-aside__note p {
    margin: 0 0 8px;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--rock);
    letter-spacing: 0.06em;
  }

  .page-about .about-aside__note a {
    display: block;
    text-decoration: none;
    color: var(--green-900);
    padding: 4px 0;
    border-bottom: 1px solid rgba(11, 61, 46, 0.1);
  }

  .page-about .about-aside__note a:hover {
    color: var(--terracotta);
    border-color: var(--terracotta);
  }

  .page-about .about-nav {
    flex-direction: column;
    gap: 6px;
    overflow: visible;
  }

  .page-about .about-nav__link {
    border: none;
    background: transparent;
    padding: 6px 10px;
    clip-path: none;
  }

  .page-about .about-nav__link:hover {
    background: var(--white);
    border-left: 3px solid var(--gold);
    padding-left: 8px;
  }
}