.page-about {
  --about-ice: linear-gradient(180deg, var(--cyan-400) 0%, var(--blue-500) 52%, var(--blue-700) 100%);
  --about-card-line: var(--line-200);
  color: var(--text-700);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 48px 0 64px;
  background:
    radial-gradient(120% 76% at 92% 4%, rgba(63, 214, 208, 0.16), transparent 62%),
    radial-gradient(90% 70% at 2% 0%, rgba(44, 143, 224, 0.14), transparent 58%),
    var(--white);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -80px;
  top: 32px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(63, 214, 208, 0.22), transparent 70%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 40px;
}

.page-about .about-hero__title {
  margin: 16px 0 0;
  font-size: clamp(28px, 7vw, 50px);
  line-height: 1.18;
  letter-spacing: -0.02em;
  font-weight: 700;
  color: var(--ink-950);
}

.page-about .about-hero__lead {
  margin: 20px 0 0;
  max-width: 60ch;
}

.page-about .about-stats {
  margin: 34px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .about-stat {
  padding: 16px 16px 14px;
  border-radius: var(--r-md);
  border: 1px solid var(--about-card-line);
  background: linear-gradient(180deg, var(--white), var(--frost-050));
}

.page-about .about-stat__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--text-500);
}

.page-about .about-stat__num {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: 21px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--blue-700);
}

.page-about .about-stat__num span {
  margin-left: 4px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-500);
}

.page-about .about-hero__figure {
  margin: 0;
  position: relative;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 44px), calc(100% - 44px) 100%, 0 100%);
  border: 1px solid var(--line-200);
  background: var(--frost-050);
  overflow: hidden;
}

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

.page-about .about-hero__caption {
  position: absolute;
  left: 16px;
  bottom: 12px;
  padding: 5px 12px;
  border-radius: var(--r-pill);
  background: rgba(6, 26, 46, 0.72);
  color: var(--white);
  font-size: 11px;
  letter-spacing: 0.14em;
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  background: var(--frost-050);
  overflow: hidden;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(44, 143, 224, 0.12) 1px, transparent 1px);
  background-size: 34px 34px;
  opacity: 0.6;
  pointer-events: none;
}

.page-about .about-timeline > .wrap {
  position: relative;
  z-index: 1;
}

.page-about .ice-timeline {
  list-style: none;
  margin: 44px 0 0;
  padding: 0;
}

.page-about .ice-timeline__layer {
  position: relative;
  display: grid;
  gap: 12px;
  padding: 30px 0 28px;
  border-bottom: 1px solid var(--line-200);
}

.page-about .ice-timeline__layer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: min(260px, 64%);
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--cyan-400), var(--blue-500) 52%, transparent);
}

.page-about .ice-timeline__layer:first-child::before {
  background: linear-gradient(90deg, var(--orange-500), var(--cyan-400) 34%, transparent);
}

.page-about .ice-timeline__year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--blue-500);
}

.page-about .ice-timeline__body h3 {
  margin: 0 0 8px;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink-950);
}

.page-about .ice-timeline__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text-700);
}

.page-about .ice-timeline__bubble {
  justify-self: start;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  margin: 0;
  padding: 10px 20px;
  border-radius: var(--r-pill);
  background: var(--white);
  border: 1px solid var(--line-200);
  box-shadow: var(--shadow-soft);
}

.page-about .ice-timeline__bubble-num {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
  color: var(--blue-700);
}

.page-about .ice-timeline__bubble-unit {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--text-500);
}

.page-about .about-timeline__figure {
  margin: 40px 0;
  padding: 0;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 30px 100%, 0 calc(100% - 30px));
  border: 1px solid var(--line-200);
  background: var(--ink-950);
  overflow: hidden;
}

.page-about .about-timeline__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 460px;
  object-fit: cover;
}

.page-about .about-timeline__figure figcaption {
  padding: 12px 18px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-500);
  background: var(--white);
}

/* ---------- 六大栏目 ---------- */
.page-about .about-channels {
  background: var(--white);
}

.page-about .channel-grid {
  margin-top: 44px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-about .channel-card {
  position: relative;
  padding: 26px 22px 22px;
  border-radius: var(--r-md);
  border: 1px solid var(--about-card-line);
  background: var(--white);
  overflow: hidden;
  transition: transform 0.28s var(--ease), border-color 0.28s var(--ease), box-shadow 0.28s var(--ease);
}

.page-about .channel-card::after {
  content: "";
  position: absolute;
  right: -48px;
  bottom: -56px;
  width: 150px;
  height: 150px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(63, 214, 208, 0.24), transparent 70%);
  pointer-events: none;
}

.page-about .channel-card:hover {
  transform: translateY(-4px);
  border-color: var(--blue-500);
  box-shadow: var(--shadow-float);
}

.page-about .channel-card__num {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cyan-400);
}

.page-about .channel-card__name {
  margin: 12px 0 10px;
  font-size: 22px;
  font-weight: 700;
  color: var(--ink-950);
}

.page-about .channel-card__desc {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-700);
}

.page-about .channel-card__meta {
  margin: 0;
  padding-top: 14px;
  border-top: 1px dashed var(--line-200);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-500);
}

/* ---------- 内容来源 ---------- */
.page-about .about-source {
  background: linear-gradient(180deg, var(--frost-050), var(--white));
}

.page-about .about-source__inner {
  display: grid;
  gap: 36px;
}

.page-about .about-source__copy h2 {
  margin: 10px 0 16px;
}

.page-about .about-source__copy p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.8;
}

.page-about .about-source__copy .btn {
  margin-top: 8px;
}

.page-about .source-points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .source-point {
  padding: 20px 20px 18px;
  border-radius: var(--r-md);
  border: 1px solid var(--line-200);
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.page-about .source-point__num {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--blue-500);
}

.page-about .source-point h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--ink-950);
}

.page-about .source-point p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-700);
}

/* ---------- 三级审核 ---------- */
.page-about .about-review {
  background: var(--ink-950);
  color: var(--frost-050);
}

.page-about .about-review .eyebrow,
.page-about .about-review .section-head__title {
  color: var(--white);
}

.page-about .about-review .section-head__title {
  background: linear-gradient(96deg, var(--white) 18%, var(--cyan-400) 96%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-about .about-review .section-head__desc {
  color: rgba(241, 247, 253, 0.72);
}

.page-about .review-steps {
  list-style: none;
  margin: 46px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .review-step {
  position: relative;
  padding: 26px 22px 24px;
  border-radius: var(--r-md);
  border: 1px solid rgba(201, 222, 243, 0.24);
  background: linear-gradient(165deg, rgba(44, 143, 224, 0.14), rgba(6, 26, 46, 0.14));
}

.page-about .review-step::before {
  content: "";
  position: absolute;
  left: 0;
  top: 26px;
  bottom: 26px;
  width: 3px;
  border-radius: 3px;
  background: var(--about-ice);
}

.page-about .review-step__idx {
  display: block;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--cyan-400);
}

.page-about .review-step h3 {
  margin: 12px 0 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--white);
}

.page-about .review-step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(241, 247, 253, 0.76);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: var(--white);
}

.page-about .about-team__head {
  max-width: 66ch;
}

.page-about .about-team__head .lead {
  margin-top: 16px;
}

.page-about .team-bars {
  margin-top: 42px;
  display: grid;
  gap: 22px;
}

.page-about .team-bar {
  padding: 22px 22px 20px;
  border-radius: var(--r-md);
  border: 1px solid var(--line-200);
  background: var(--frost-050);
}

.page-about .team-bar__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.page-about .team-bar__name {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink-950);
}

.page-about .team-bar__num {
  font-size: 15px;
  font-weight: 700;
  color: var(--blue-700);
}

.page-about .team-bar__track {
  margin: 14px 0 14px;
  height: 8px;
  border-radius: var(--r-pill);
  background: var(--line-200);
  overflow: hidden;
}

.page-about .team-bar__fill {
  display: block;
  height: 100%;
  border-radius: var(--r-pill);
  background: var(--about-ice);
}

.page-about .team-bar--tech .team-bar__fill {
  width: 50%;
}

.page-about .team-bar--service .team-bar__fill {
  width: 26.5%;
  background: linear-gradient(90deg, var(--cyan-400), var(--blue-500) 70%, var(--orange-500));
}

.page-about .team-bar--editor .team-bar__fill {
  width: 23.5%;
  background: linear-gradient(90deg, var(--cyan-400), var(--mint-300) 90%);
}

.page-about .team-bar__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--text-500);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  background: linear-gradient(180deg, var(--white), var(--frost-050));
}

.page-about .partner-layout {
  margin-top: 46px;
  display: grid;
  gap: 38px;
}

.page-about .partner-radial-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  padding: 26px 18px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line-200);
  background: var(--white);
  box-shadow: var(--shadow-soft);
}

.page-about .partner-radial {
  display: block;
  width: 100%;
  max-width: 320px;
  height: auto;
}

.page-about .partner-radial .rp-ring {
  fill: none;
  stroke: var(--line-200);
  stroke-width: 1;
  stroke-dasharray: 3 7;
}

.page-about .partner-radial .rp-node circle {
  fill: var(--white);
  stroke: var(--blue-500);
  stroke-width: 2;
}

.page-about .partner-radial .rp-node--inner circle {
  fill: var(--cyan-400);
  stroke: var(--white);
}

.page-about .rp-core-text {
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 700;
  fill: var(--white);
}

.page-about .partner-radial__caption {
  margin: 0;
  text-align: center;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-500);
}

.page-about .partner-copy h3 {
  margin: 0 0 14px;
  font-size: 22px;
  font-weight: 700;
  color: var(--ink-950);
}

.page-about .partner-copy p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-700);
}

.page-about .partner-copy .media-frame {
  margin-top: 22px;
}

.page-about .partner-copy .media-frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 会员服务由来 ---------- */
.page-about .about-membership {
  background: var(--white);
}

.page-about .membership-panel {
  display: grid;
  gap: 26px;
  padding: 34px 24px;
  border-radius: var(--r-lg);
  background:
    radial-gradient(120% 100% at 100% 0%, rgba(63, 214, 208, 0.22), transparent 58%),
    linear-gradient(150deg, var(--blue-700), var(--ink-950));
  color: var(--frost-050);
}

.page-about .membership-panel .eyebrow {
  color: var(--cyan-400);
}

.page-about .membership-panel h2 {
  margin: 10px 0 16px;
  font-size: clamp(24px, 5.4vw, 32px);
  font-weight: 700;
  line-height: 1.25;
  color: var(--white);
}

.page-about .membership-panel p {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(241, 247, 253, 0.82);
}

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

.page-about .membership-panel__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .membership-panel__list li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  border-radius: var(--r-sm);
  border: 1px solid rgba(201, 222, 243, 0.28);
  background: rgba(255, 255, 255, 0.08);
  font-size: 14px;
  color: var(--frost-050);
}

.page-about .membership-panel__list .mono {
  color: var(--cyan-400);
  font-size: 12px;
  letter-spacing: 0.14em;
}

.page-about .about-membership__more {
  margin: 26px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-500);
}

.page-about .about-membership__more a {
  color: var(--blue-500);
  text-decoration: none;
  border-bottom: 1px solid var(--line-200);
}

.page-about .about-membership__more a:hover {
  border-bottom-color: var(--blue-500);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero {
    padding: 60px 0 80px;
  }

  .page-about .channel-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .source-points {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .review-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .membership-panel {
    padding: 44px 40px;
  }

  .page-about .membership-panel__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .membership-panel__list li {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: center;
  }

  .page-about .about-stats {
    margin-top: 40px;
  }

  .page-about .ice-timeline__layer {
    grid-template-columns: 132px minmax(0, 1fr) auto;
    gap: 36px;
    align-items: start;
    padding: 38px 0 36px;
  }

  .page-about .ice-timeline__year {
    padding-top: 4px;
  }

  .page-about .ice-timeline__bubble {
    justify-self: end;
  }

  .page-about .about-source__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .channel-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .team-bars {
    gap: 26px;
  }

  .page-about .partner-layout {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .membership-panel {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 40px;
    align-items: center;
  }
}

@media (min-width: 1100px) {
  .page-about .about-timeline__figure img {
    max-height: 520px;
  }

  .page-about .about-hero__caption {
    left: 22px;
    bottom: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .channel-card {
    transition: none;
  }

  .page-about .channel-card:hover {
    transform: none;
  }
}