/* ===== 关于我们 / page-about 专属样式 ===== */
.page-about {
  position: relative;
  overflow-x: hidden;
}
.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ---------- 首屏封面 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 40px 0 28px;
  overflow: hidden;
  border-bottom: 1px solid var(--c-border);
  background:
    linear-gradient(rgba(15, 43, 76, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 43, 76, 0.06) 1px, transparent 1px);
  background-size: 32px 32px;
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 90% 15%, rgba(255, 106, 0, 0.16), transparent 42%);
  pointer-events: none;
}
.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  max-width: 860px;
}
.page-about .about-hero__title {
  margin: 14px 0 18px;
  max-width: 11em;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 7vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: 0.01em;
  color: var(--c-primary);
}
.page-about .about-hero__lead {
  margin: 0;
  max-width: 42em;
  font-size: 1.02rem;
  line-height: 1.8;
  color: var(--c-gray);
}
.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
}
.page-about .about-hero__fact {
  padding: 16px 14px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.72);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}
.page-about .about-hero__fact-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--c-accent);
}
.page-about .about-hero__fact-label {
  display: block;
  margin-top: 6px;
  font-size: 0.8rem;
  line-height: 1.4;
  color: var(--c-gray);
}
.page-about .about-hero__emblem {
  position: absolute;
  top: 4px;
  right: -70px;
  width: 260px;
  height: 260px;
  opacity: 0.16;
  pointer-events: none;
}
.page-about .about-hero__emblem-ring {
  position: absolute;
  border-radius: 50%;
}
.page-about .about-hero__emblem-ring--outer {
  inset: 0;
  border: 1px dashed var(--c-primary);
  animation: about-hero-spin 36s linear infinite;
}
.page-about .about-hero__emblem-ring--inner {
  inset: 38px;
  border: 1px solid var(--c-accent);
}
.page-about .about-hero__emblem-core {
  position: absolute;
  inset: 66px;
  display: grid;
  place-items: center;
  border-radius: 18px;
  background: var(--c-primary);
  color: var(--c-white);
  font-family: var(--font-display);
  font-size: 2.4rem;
  box-shadow: 0 10px 30px rgba(7, 26, 46, 0.24);
}
@keyframes about-hero-spin {
  to {
    transform: rotate(360deg);
  }
}

/* ---------- 本页目录 ---------- */
.page-about .about-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  align-items: center;
  padding: 16px 0;
  border-bottom: 1px solid var(--c-border);
  font-size: 0.86rem;
}
.page-about .about-toc__title {
  margin-right: 4px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--c-gray);
}
.page-about .about-toc__link {
  font-family: var(--font-mono);
  color: var(--c-primary);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}
.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  color: var(--c-accent);
  border-bottom-color: var(--c-accent);
}

/* ---------- 我们是谁 ---------- */
.page-about .about-who {
  display: grid;
  gap: 20px 40px;
  padding: 48px 0;
  border-bottom: 1px solid var(--c-border);
}
.page-about .about-who__body p {
  margin: 0 0 14px;
  max-width: 52em;
  line-height: 1.9;
  color: var(--c-text);
}
.page-about .about-who__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  align-items: center;
  margin-top: 20px;
}
.page-about .about-who__link {
  color: var(--c-accent);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

/* ---------- 发展历程 ---------- */
.page-about .about-timeline {
  padding: 48px 0;
  border-bottom: 1px solid var(--c-border);
}
.page-about .about-timeline__head {
  margin-bottom: 28px;
}
.page-about .about-timeline__desc {
  margin: 10px 0 0;
  max-width: 36em;
  line-height: 1.8;
  color: var(--c-gray);
}
.page-about .about-timeline__layout {
  display: grid;
  gap: 28px;
}
.page-about .about-timeline__list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  border-radius: 999px;
  background: linear-gradient(to bottom, var(--c-primary) 0%, var(--c-accent) 100%);
}
.page-about .tl-item {
  position: relative;
  padding: 0 0 26px 38px;
}
.page-about .tl-item:last-child {
  padding-bottom: 0;
}
.page-about .tl-item__marker {
  position: absolute;
  left: 6px;
  top: 22px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--c-accent);
  box-shadow: 0 0 0 4px var(--c-paper), 0 0 0 6px var(--c-accent);
  transition: background-color var(--transition), box-shadow var(--transition);
}
.page-about .tl-item:hover .tl-item__marker,
.page-about .tl-item:focus-within .tl-item__marker {
  background: var(--c-primary);
  box-shadow: 0 0 0 4px var(--c-paper), 0 0 0 6px var(--c-primary);
}
.page-about .tl-item__card {
  padding: 18px 18px 20px;
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-left: 3px solid var(--c-accent);
  border-radius: var(--radius);
  box-shadow: 0 6px 20px rgba(7, 26, 46, 0.06);
  transition: transform var(--transition), box-shadow var(--transition);
}
.page-about .tl-item__card:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(7, 26, 46, 0.12);
}
.page-about .tl-item__meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
}
.page-about .tl-item__index {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--c-primary);
  color: var(--c-white);
  font-weight: 700;
  font-size: 0.84rem;
}
.page-about .tl-item__stage {
  color: var(--c-gray);
}
.page-about .tl-item__card h3 {
  margin: 0 0 8px;
  font-size: 1.08rem;
  color: var(--c-primary);
}
.page-about .tl-item__card p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--c-gray);
}
.page-about .about-timeline__figure {
  margin: 0;
}
.page-about .about-timeline__figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: var(--radius-lg);
}
.page-about .about-timeline__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-gray);
}

/* ---------- 用户与社区 ---------- */
.page-about .about-community {
  padding: 48px 0;
  border-bottom: 1px solid var(--c-border);
}
.page-about .about-community__head {
  margin-bottom: 28px;
}
.page-about .about-community__head > p:last-child {
  margin: 10px 0 0;
  max-width: 46em;
  line-height: 1.8;
  color: var(--c-gray);
}
.page-about .about-community__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}
.page-about .stat-card {
  position: relative;
  overflow: hidden;
  padding: 18px 16px;
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  transition: transform var(--transition), box-shadow var(--transition);
}
.page-about .stat-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 26px rgba(7, 26, 46, 0.1);
}
.page-about .stat-card::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-accent), transparent 70%);
}
.page-about .stat-card--primary {
  background: var(--c-primary);
  border-color: var(--c-primary);
  color: var(--c-white);
}
.page-about .stat-card__index {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  color: var(--c-accent);
}
.page-about .stat-card--primary .stat-card__index {
  color: rgba(255, 255, 255, 0.72);
}
.page-about .stat-card__value {
  display: block;
  margin-top: 14px;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 2.7rem);
  line-height: 1;
  letter-spacing: 0.01em;
  color: var(--c-primary);
}
.page-about .stat-card__value em {
  font-style: normal;
  font-size: 0.55em;
  color: var(--c-accent);
}
.page-about .stat-card--primary .stat-card__value {
  color: var(--c-white);
}
.page-about .stat-card--primary .stat-card__value em {
  color: var(--c-accent);
}
.page-about .stat-card__label {
  display: block;
  margin-top: 8px;
  font-size: 0.82rem;
  line-height: 1.45;
  color: var(--c-gray);
}
.page-about .stat-card--primary .stat-card__label {
  color: rgba(255, 255, 255, 0.86);
}
.page-about .about-community__bottom {
  display: grid;
  gap: 20px;
  margin-top: 20px;
}
.page-about .about-community__bars {
  padding: 24px 20px;
  background: var(--c-dark);
  border-radius: var(--radius-lg);
  color: var(--c-white);
}
.page-about .about-community__bars h3 {
  margin: 0 0 18px;
  font-size: 1.05rem;
  color: var(--c-white);
}
.page-about .bar-row {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr) 42px;
  gap: 12px;
  align-items: center;
  margin-bottom: 14px;
}
.page-about .bar-row:last-child {
  margin-bottom: 0;
}
.page-about .bar-row__head {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.68);
}
.page-about .bar-row__track {
  height: 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.16);
  overflow: hidden;
}
.page-about .bar-row__fill {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--c-accent), #FF9A4D);
}
.page-about .bar-row--90 .bar-row__fill {
  width: 90%;
}
.page-about .bar-row--91 .bar-row__fill {
  width: 91%;
}
.page-about .bar-row--93 .bar-row__fill {
  width: 93%;
}
.page-about .bar-row__value {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  text-align: right;
  color: var(--c-white);
}
.page-about .about-community__bars-note {
  margin: 18px 0 0;
  font-size: 0.78rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.54);
}
.page-about .about-community__figure {
  margin: 0;
}
.page-about .about-community__figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--radius-lg);
}
.page-about .about-community__caption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-gray);
}

/* ---------- 团队与组织 ---------- */
.page-about .about-team {
  padding: 48px 0;
  border-bottom: 1px solid var(--c-border);
}
.page-about .about-team__head {
  margin-bottom: 26px;
}
.page-about .about-team__head > p:last-child {
  margin: 10px 0 0;
  max-width: 38em;
  line-height: 1.8;
  color: var(--c-gray);
}
.page-about .about-team__layout {
  display: grid;
  gap: 24px;
}
.page-about .about-team__figure {
  margin: 0;
  order: 0;
}
.page-about .about-team__figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--radius-lg);
}
.page-about .about-team__caption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-gray);
}
.page-about .about-team__list {
  order: 0;
}
.page-about .team-row {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "index count"
    "body body";
  gap: 8px 16px;
  padding: 18px 0;
  border-top: 1px solid var(--c-border);
}
.page-about .team-row:last-child {
  border-bottom: 1px solid var(--c-border);
}
.page-about .team-row__index {
  grid-area: index;
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--c-accent);
}
.page-about .team-row__body {
  grid-area: body;
}
.page-about .team-row__body h3 {
  margin: 0 0 6px;
  font-size: 1.05rem;
  color: var(--c-primary);
}
.page-about .team-row__body p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--c-gray);
}
.page-about .team-row__count {
  grid-area: count;
  align-self: start;
  justify-self: end;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--c-primary);
  color: var(--c-white);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  white-space: nowrap;
}

/* ---------- 资质与认证 ---------- */
.page-about .about-certs {
  padding: 48px 0;
  border-bottom: 1px solid var(--c-border);
}
.page-about .about-certs__head {
  margin-bottom: 24px;
}
.page-about .about-certs__grid {
  display: grid;
  gap: 16px;
}
.page-about .cert-card {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2px 16px;
  align-items: start;
  padding: 22px 20px;
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  transition: transform var(--transition), box-shadow var(--transition);
}
.page-about .cert-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(7, 26, 46, 0.1);
}
.page-about .cert-card__shield {
  grid-row: span 2;
  display: grid;
  place-items: center;
  width: 46px;
  height: 52px;
  background: var(--c-primary);
  clip-path: polygon(50% 0, 100% 12%, 88% 82%, 50% 100%, 12% 82%, 0 12%);
  color: var(--c-white);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-align: center;
}
.page-about .cert-card h3 {
  margin: 0 0 8px;
  font-size: 1.02rem;
  line-height: 1.5;
  color: var(--c-primary);
}
.page-about .cert-card p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--c-gray);
}
.page-about .cert-card--dark {
  background: var(--c-primary);
  border-color: var(--c-primary);
}
.page-about .cert-card--dark .cert-card__shield {
  background: var(--c-accent);
  color: var(--c-primary);
}
.page-about .cert-card--dark h3 {
  color: var(--c-white);
}
.page-about .cert-card--dark p {
  color: rgba(255, 255, 255, 0.78);
}
.page-about .cert-card__link {
  grid-column: 2;
  justify-self: start;
  margin-top: 2px;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--c-accent);
  text-decoration: none;
}

/* ---------- 底部引导 ---------- */
.page-about .about-cta {
  padding: 48px 0 56px;
}
.page-about .about-cta__inner {
  position: relative;
  overflow: hidden;
  padding: 32px 24px;
  background: linear-gradient(120deg, var(--c-dark) 0%, var(--c-primary) 100%);
  border-radius: var(--radius-lg);
  color: var(--c-white);
  box-shadow: 0 18px 40px rgba(7, 26, 46, 0.25);
}
.page-about .about-cta__inner::before {
  content: "";
  position: absolute;
  right: -60px;
  top: -60px;
  width: 220px;
  height: 220px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 50%;
}
.page-about .about-cta__inner::after {
  content: "";
  position: absolute;
  right: 10px;
  bottom: -80px;
  width: 180px;
  height: 180px;
  border: 34px solid rgba(255, 106, 0, 0.18);
  border-radius: 50%;
}
.page-about .about-cta__mono {
  position: relative;
  z-index: 1;
  color: var(--c-accent);
}
.page-about .about-cta__title {
  position: relative;
  z-index: 1;
  margin: 10px 0 12px;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  line-height: 1.2;
  color: var(--c-white);
}
.page-about .about-cta__desc {
  position: relative;
  z-index: 1;
  margin: 0;
  max-width: 38em;
  font-size: 0.95rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.76);
}
.page-about .about-cta__actions {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}
.page-about .about-cta__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: none;
  transition: transform var(--transition), background-color var(--transition);
}
.page-about .about-cta__link:hover,
.page-about .about-cta__link:focus-visible {
  transform: translateY(-2px);
}
.page-about .about-cta__link--solid {
  background: var(--c-accent);
  color: var(--c-dark);
}
.page-about .about-cta__link--solid:hover {
  background: var(--c-accent-dark);
}
.page-about .about-cta__link--ghost {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.35);
  color: var(--c-white);
}
.page-about .about-cta__link--ghost:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--c-white);
}

/* ---------- 桌面增强 ---------- */
@media (min-width: 768px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-who {
    grid-template-columns: 240px minmax(0, 1fr);
    padding: 56px 0;
  }
  .page-about .about-community__grid {
    gap: 16px;
  }
}
@media (min-width: 960px) {
  .page-about .about-timeline__layout {
    grid-template-columns: minmax(0, 2.1fr) minmax(0, 0.9fr);
    align-items: start;
    gap: 40px;
  }
  .page-about .about-timeline__list::before {
    left: 50%;
    transform: translateX(-50%);
  }
  .page-about .tl-item {
    display: flex;
    justify-content: flex-start;
    width: 100%;
    padding: 0 0 30px;
  }
  .page-about .tl-item--alt {
    justify-content: flex-end;
  }
  .page-about .tl-item__marker {
    left: 50%;
    top: 34px;
    transform: translateX(-50%);
  }
  .page-about .tl-item__card {
    width: calc(50% - 48px);
    box-sizing: border-box;
  }
  .page-about .tl-item--alt .tl-item__card {
    border-left: 1px solid var(--c-border);
    border-right: 3px solid var(--c-accent);
  }
  .page-about .about-community__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-community__bottom {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 24px;
    align-items: center;
  }
  .page-about .about-team__layout {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 32px;
    align-items: center;
  }
  .page-about .about-team__figure {
    order: 0;
  }
  .page-about .about-team__list {
    order: 1;
  }
  .page-about .about-certs__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
}
@media (min-width: 900px) {
  .page-about .team-row {
    grid-template-columns: auto 1fr auto;
    grid-template-areas: "index .page-about count";
    gap: 20px;
    align-items: start;
  }
}
@media (min-width: 1024px) {
  .page-about .about-hero__inner {
    max-width: 760px;
  }
  .page-about .about-hero__emblem {
    right: 10%;
    top: 8px;
    opacity: 1;
  }
}