.page-about .breadcrumbs { margin-bottom: 16px; }

/* ===== 首屏 Hero ===== */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 40px 0 56px;
}
.page-about .about-hero::before {
  content: "01";
  position: absolute;
  top: -10px;
  right: -12px;
  font-family: var(--font-mono);
  font-size: clamp(5rem, 22vw, 12rem);
  font-weight: 900;
  line-height: 0.75;
  color: rgba(27, 27, 31, 0.045);
  letter-spacing: -0.04em;
  pointer-events: none;
  z-index: 0;
}
.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 36px;
}
.page-about .about-hero__copy { max-width: 680px; }

.page-about .about-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-orange);
  background: rgba(255, 77, 28, 0.08);
  border: 1px solid rgba(255, 77, 28, 0.28);
  border-radius: 999px;
  padding: 5px 12px 5px 9px;
  margin-bottom: 16px;
}
.page-about .about-eyebrow::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-orange);
  flex: 0 0 auto;
}
.page-about .about-hero__title {
  margin: 6px 0 18px;
  font-size: clamp(2.5rem, 8vw, 4.6rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.02;
  color: var(--color-ink);
}
.page-about .about-hero__title-sub {
  display: inline-block;
  margin-top: 12px;
  font-size: clamp(1rem, 3vw, 1.4rem);
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--color-orange);
  border-left: 4px solid var(--color-orange);
  padding-left: 14px;
  line-height: 1.2;
}
.page-about .about-hero__lead {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--color-mgray);
  max-width: 46em;
  margin-bottom: 8px;
}
.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin: 28px 0 24px;
}
.page-about .about-hero__fact {
  background: #fff;
  border: 1px solid rgba(27, 27, 31, 0.06);
  border-radius: var(--radius-md);
  padding: 14px 12px;
  text-align: center;
  transition: border-color 0.25s ease, transform 0.25s ease;
}
.page-about .about-hero__fact:hover {
  border-color: var(--color-orange);
  transform: translateY(-2px);
}
.page-about .about-hero__fact-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-ink);
  line-height: 1.1;
}
.page-about .about-hero__fact-label {
  display: block;
  font-size: 0.72rem;
  color: var(--color-mgray);
  margin-top: 4px;
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-about .about-hero__visual {
  position: relative;
  margin-top: 10px;
}
.page-about .about-hero__img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  object-fit: cover;
  background: var(--color-gray);
}
.page-about .about-hero__stamp {
  position: absolute;
  right: 14px;
  bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--color-orange);
  color: #fff;
  padding: 12px 18px;
  border-radius: 999px;
  box-shadow: var(--shadow-hover);
  animation: aboutPulse 2.4s ease-out infinite;
}
@keyframes aboutPulse {
  0% { box-shadow: 0 0 0 0 rgba(255, 77, 28, 0.5); }
  70% { box-shadow: 0 0 0 14px rgba(255, 77, 28, 0); }
  100% { box-shadow: 0 0 0 0 rgba(255, 77, 28, 0); }
}
.page-about .about-hero__stamp-num {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1;
}
.page-about .about-hero__stamp-label {
  font-size: 0.8rem;
  font-weight: 600;
  line-height: 1.1;
}

/* ===== 章节布局 ===== */
.page-about .about-split { padding-top: 8px; }
.page-about .about-index__heading {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-mgray);
  margin-bottom: 10px;
}
.page-about .about-index__nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 0 0 12px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}
.page-about .about-index__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  white-space: nowrap;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid rgba(27, 27, 31, 0.12);
  background: #fff;
  color: var(--color-ink);
  font-size: 0.84rem;
  font-weight: 600;
  transition: transform 0.25s ease, border-color 0.25s ease, background 0.25s ease;
}
.page-about .about-index__link:hover {
  border-color: var(--color-orange);
  background: var(--color-paper);
  transform: translateY(-2px);
}
.page-about .about-index__num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--color-orange);
}

/* ===== 内容区通用 ===== */
.page-about .about-content {
  display: grid;
  gap: 52px;
}
.page-about .about-content > section:last-child { margin-bottom: 0; }
.page-about .about-content h2 {
  font-size: clamp(1.8rem, 4.5vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.12;
  color: var(--color-ink);
  margin: 0 0 12px;
}
.page-about .about-lead {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-mgray);
  max-width: 52ch;
}

/* ===== 湖湘基因 ===== */
.page-about .about-gene__figure {
  margin: 26px 0 22px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-gray);
}
.page-about .about-gene__img {
  display: block;
  width: 100%;
  height: auto;
}
.page-about .about-gene__story {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin: 0 0 18px;
}
.page-about .about-gene__story p {
  margin: 0;
  font-size: 0.925rem;
  line-height: 1.75;
  color: var(--color-ink);
}
.page-about .about-gene__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* ===== 发展里程碑 / 时间线 ===== */
.page-about .about-timeline {
  position: relative;
  margin-top: 30px;
  padding-left: 30px;
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--color-orange) 0%, var(--color-orange) 30%, rgba(15, 42, 74, 0.18) 75%, rgba(15, 42, 74, 0.05) 100%);
}
.page-about .about-timeline__item {
  position: relative;
  border: 1px solid rgba(27, 27, 31, 0.08);
  background: rgba(255, 255, 255, 0.6);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}
.page-about .about-timeline__item[open] {
  border-color: rgba(255, 77, 28, 0.5);
  box-shadow: var(--shadow-card);
}
.page-about .about-timeline__node {
  position: absolute;
  left: -30px;
  top: 22px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-orange);
  border: 3px solid var(--color-paper);
  box-shadow: 0 0 0 2px var(--color-orange);
}
.page-about .about-timeline__summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 16px 16px 18px;
  cursor: pointer;
  list-style: none;
}
.page-about .about-timeline__summary::-webkit-details-marker { display: none; }
.page-about .about-timeline__idx {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--color-orange);
  background: rgba(255, 77, 28, 0.1);
  border-radius: 999px;
  padding: 5px 9px;
  margin-top: 2px;
}
.page-about .about-timeline__head {
  flex: 1 1 auto;
  min-width: 0;
}
.page-about .about-timeline__stage {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--color-blue);
  margin-bottom: 2px;
}
.page-about .about-timeline__title {
  display: block;
  font-size: 0.93rem;
  font-weight: 700;
  color: var(--color-ink);
  line-height: 1.4;
}
.page-about .about-timeline__toggle {
  flex: 0 0 auto;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(27, 27, 31, 0.06);
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  line-height: 1;
  color: var(--color-mgray);
  transition: transform 0.3s ease, background 0.3s ease, color 0.3s ease;
  margin-top: 1px;
}
.page-about .about-timeline__item[open] .about-timeline__toggle {
  transform: rotate(45deg);
  background: var(--color-orange);
  color: #fff;
}
.page-about .about-timeline__body {
  margin: 0 16px 16px 34px;
  padding: 12px 16px;
  background: rgba(27, 27, 31, 0.025);
  border-radius: var(--radius-sm);
  font-size: 0.86rem;
  color: var(--color-mgray);
  line-height: 1.7;
}

/* ===== 服务版图 ===== */
.page-about .about-coverage {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(255, 77, 28, 0.12) 0%, transparent 45%), var(--color-blue);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: 34px 24px;
}
.page-about .about-coverage::after {
  content: "MAP";
  position: absolute;
  right: -12px;
  bottom: -28px;
  font-family: var(--font-mono);
  font-size: 5.8rem;
  font-weight: 900;
  letter-spacing: -0.05em;
  color: rgba(255, 255, 255, 0.045);
  pointer-events: none;
  transform: rotate(-8deg);
}
.page-about .about-coverage .about-eyebrow {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.25);
}
.page-about .about-coverage .about-eyebrow::before { background: #fff; }
.page-about .about-coverage h2 { color: #fff; }
.page-about .about-coverage__intro {
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.95rem;
  line-height: 1.7;
  max-width: 58ch;
}
.page-about .about-coverage__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 24px;
}
.page-about .about-coverage__panel {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  padding: 20px 12px;
  text-align: center;
  transition: transform 0.3s ease, background 0.3s ease, border-color 0.3s ease;
}
.page-about .about-coverage__panel:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.3);
}
.page-about .about-coverage__value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  font-weight: 700;
  line-height: 1.1;
  color: #fff;
}
.page-about .about-coverage__label {
  display: block;
  margin-top: 10px;
  font-size: 0.82rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.85);
}
.page-about .about-coverage__detail {
  display: block;
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: rgba(255, 255, 255, 0.5);
}
.page-about .about-coverage__extra {
  display: grid;
  gap: 10px;
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 0.88rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.72);
}
.page-about .about-coverage__extra p { margin: 0; }
.page-about .about-coverage__extra a {
  color: #fff;
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: rgba(255, 255, 255, 0.4);
  transition: text-decoration-color 0.2s ease;
}
.page-about .about-coverage__extra a:hover { text-decoration-color: #fff; }
.page-about .about-coverage__extra strong { color: #fff; }
.page-about .about-mono {
  font-family: var(--font-mono);
  font-weight: 600;
  color: inherit;
}

/* ===== 数据管理机制 ===== */
.page-about .about-data__flow {
  display: grid;
  gap: 24px;
  margin-top: 28px;
}
.page-about .about-data__steps {
  display: grid;
  gap: 14px;
}
.page-about .about-data__step {
  background: #fff;
  border-radius: var(--radius-md);
  border: 1px solid rgba(27, 27, 31, 0.07);
  border-left: 4px solid var(--color-orange);
  padding: 18px 20px;
  box-shadow: var(--shadow-card);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.page-about .about-data__step:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}
.page-about .about-data__step-num {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--color-orange);
}
.page-about .about-data__step h3 {
  margin: 6px 0 6px;
  font-size: 1.02rem;
  font-weight: 800;
  color: var(--color-ink);
}
.page-about .about-data__step p {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.65;
  color: var(--color-mgray);
}
.page-about .about-data__figure {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: var(--color-gray);
}
.page-about .about-data__figure::after {
  content: "";
  position: absolute;
  top: 0;
  left: -45%;
  width: 35%;
  height: 100%;
  background: linear-gradient(105deg, transparent, rgba(255, 255, 255, 0.55), transparent);
  animation: aboutFlow 3.6s ease-in-out infinite;
}
@keyframes aboutFlow {
  0% { left: -45%; }
  50% { left: 115%; }
  100% { left: 115%; }
}
.page-about .about-data__img {
  display: block;
  width: 100%;
  height: auto;
  position: relative;
}
.page-about .about-data__proof {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 24px;
}
.page-about .about-data__proof .data-panel {
  background: var(--color-blue);
  color: #fff;
  border-radius: var(--radius-md);
  padding: 20px 16px;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.08);
}
.page-about .about-data__proof .data-panel__value {
  font-family: var(--font-mono);
  font-size: 1.45rem;
  font-weight: 700;
  display: block;
  color: #fff;
  line-height: 1.2;
}
.page-about .about-data__proof .data-panel__label {
  display: block;
  margin-top: 6px;
  font-size: 0.76rem;
  color: rgba(255, 255, 255, 0.65);
}
.page-about .about-data__note {
  margin-top: 20px;
  padding: 16px 18px;
  background: rgba(15, 42, 74, 0.06);
  border-radius: var(--radius-md);
  font-size: 0.86rem;
  color: var(--color-mgray);
  line-height: 1.65;
}

/* ===== 团队与组织形态 ===== */
.page-about .about-team__grid {
  display: grid;
  gap: 16px;
  margin-top: 28px;
}
.page-about .about-team__card {
  background: #fff;
  border-radius: var(--radius-md);
  border: 1px solid rgba(27, 27, 31, 0.06);
  padding: 26px 22px;
  box-shadow: var(--shadow-card);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.page-about .about-team__card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
}
.page-about .about-team__card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: rgba(255, 77, 28, 0.12);
  color: var(--color-orange);
  font-size: 1.35rem;
  margin-bottom: 14px;
}
.page-about .about-team__card h3 {
  font-size: 1.02rem;
  font-weight: 800;
  color: var(--color-ink);
  margin: 0 0 8px;
}
.page-about .about-team__card p {
  margin: 0;
  font-size: 0.87rem;
  line-height: 1.7;
  color: var(--color-mgray);
}
.page-about .about-team__bottom {
  display: grid;
  gap: 12px;
  margin-top: 20px;
}
.page-about .about-team__status {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--color-blue);
  border-radius: var(--radius-md);
  padding: 22px 24px;
  color: #fff;
}
.page-about .about-team__status span {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.6);
}
.page-about .about-team__status strong {
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.3;
}
.page-about .about-team__status a {
  align-self: flex-start;
  margin-top: 6px;
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: rgba(255, 255, 255, 0.4);
  transition: text-decoration-color 0.2s ease;
}
.page-about .about-team__status a:hover { text-decoration-color: #fff; }

/* ===== 桌面与平板断点 ===== */
@media (min-width: 600px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about .about-coverage__grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about .about-data__proof {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 720px) {
  .page-about .about-gene__story {
    grid-template-columns: 1fr 1fr;
    gap: 28px;
  }
  .page-about .about-team__grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about .about-team__bottom {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 992px) {
  .page-about .about-hero {
    padding: 64px 0 80px;
  }
  .page-about .about-hero__grid {
    grid-template-columns: 1fr 0.85fr;
    gap: 56px;
    align-items: center;
  }
  .page-about .about-hero__facts { margin-bottom: 28px; }
  .page-about .about-split {
    display: grid;
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 48px;
    padding-top: 24px;
    padding-bottom: 80px;
    align-items: start;
  }
  .page-about .about-index {
    position: sticky;
    top: 32px;
  }
  .page-about .about-index__heading { margin-bottom: 16px; }
  .page-about .about-index__nav {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    overflow: visible;
    padding: 0;
    border-top: 1px solid rgba(27, 27, 31, 0.08);
  }
  .page-about .about-index__link {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: transparent;
    border: 0;
    border-bottom: 1px solid rgba(27, 27, 31, 0.08);
    border-radius: 0;
    padding: 14px 6px;
  }
  .page-about .about-index__link:hover {
    background: transparent;
    border-bottom-color: var(--color-orange);
    transform: none;
  }
  .page-about .about-content { gap: 64px; }
  .page-about .about-data__flow {
    grid-template-columns: 1fr 1.1fr;
    gap: 32px;
    align-items: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    animation: none !important;
    transition: none !important;
  }
}