.page-about {
  background: var(--yz-black);
  color: var(--yz-text);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 4vw, 44px) 0 clamp(38px, 6vw, 78px);
  background:
    radial-gradient(120% 100% at 88% 0%, rgba(124, 58, 237, 0.42) 0%, rgba(124, 58, 237, 0) 58%),
    radial-gradient(90% 80% at 0% 100%, rgba(34, 211, 238, 0.16) 0%, rgba(34, 211, 238, 0) 62%),
    linear-gradient(160deg, var(--yz-black) 0%, var(--yz-indigo) 100%);
  border-bottom: 1px solid var(--yz-line);
}

.page-about .ab-hero__glow {
  position: absolute;
  right: -18%;
  bottom: -46%;
  width: min(620px, 90vw);
  height: 380px;
  background: radial-gradient(circle at 50% 50%, rgba(245, 196, 81, 0.20) 0%, rgba(245, 196, 81, 0) 70%);
  pointer-events: none;
}

.page-about .ab-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .ab-hero__grid {
  display: grid;
  gap: clamp(26px, 5vw, 54px);
  margin-top: clamp(20px, 4vw, 38px);
}

.page-about .ab-hero__title {
  margin: 12px 0 0;
  font-size: clamp(30px, 6.6vw, 60px);
  line-height: 1.1;
  letter-spacing: -0.015em;
  color: var(--yz-text);
  max-width: 16ch;
}

.page-about .ab-hero__lede {
  margin: clamp(16px, 2.6vw, 24px) 0 0;
  color: var(--yz-muted);
  max-width: 56ch;
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .ab-facts {
  padding: clamp(18px, 3vw, 26px);
  border-radius: var(--yz-radius);
  background: var(--yz-glass);
  border: 1px solid var(--yz-line);
  box-shadow: var(--yz-shadow);
  backdrop-filter: blur(12px);
}

.page-about .ab-facts__title {
  margin: 0 0 16px;
  font-family: var(--yz-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--yz-gold);
}

.page-about .ab-facts__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-facts__item {
  min-width: 0;
}

.page-about .ab-facts__num {
  display: block;
  font-size: clamp(24px, 4vw, 30px);
  line-height: 1;
  color: var(--yz-gold-light);
  letter-spacing: 0.02em;
}

.page-about .ab-facts__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--yz-muted);
}

@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    align-items: end;
  }
}

@media (min-width: 620px) {
  .page-about .ab-facts__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .ab-facts__list .ab-facts__item:nth-child(3n) {
    text-align: left;
  }
}

/* ---------- 通用小标题块 ---------- */
.page-about .ab-head {
  max-width: 66ch;
}

.page-about .ab-head .yz-h2 {
  margin: 10px 0 14px;
}

/* ---------- 时间轴骨架 ---------- */
.page-about .ab-journey {
  display: grid;
  gap: clamp(24px, 4vw, 46px);
}

.page-about .ab-toc__title {
  margin: 0 0 12px;
  font-family: var(--yz-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--yz-muted);
}

.page-about .ab-toc__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-toc__link {
  display: block;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--yz-line);
  font-size: 13px;
  color: var(--yz-muted);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.22s ease, border-color 0.22s ease, background 0.22s ease;
}

.page-about .ab-toc__link:hover,
.page-about .ab-toc__link:focus-visible {
  color: var(--yz-text);
  border-color: rgba(34, 211, 238, 0.55);
  background: var(--yz-glass-soft);
}

.page-about .ab-timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0 0 0 40px;
  list-style: none;
}

.page-about .ab-timeline::before {
  content: "";
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: 9px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--yz-violet) 0%, var(--yz-cyan) 58%, rgba(34, 211, 238, 0) 100%);
}

.page-about .ab-node {
  position: relative;
}

.page-about .ab-node__dot {
  position: absolute;
  top: 24px;
  left: -40px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, var(--yz-cyan) 0%, var(--yz-violet) 100%);
  box-shadow: 0 0 0 4px rgba(124, 58, 237, 0.18), 0 0 22px rgba(34, 211, 238, 0.42);
}

.page-about .ab-node__card {
  padding: clamp(18px, 3vw, 26px);
}

.page-about .ab-node__card .yz-card__head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.page-about .ab-node__card .yz-h3 {
  margin: 0 0 10px;
  font-size: clamp(18px, 3.2vw, 22px);
  line-height: 1.4;
}

.page-about .ab-node__card .yz-prose {
  margin: 0;
  font-size: 15px;
  color: var(--yz-muted);
}

.page-about .ab-node__list {
  display: grid;
  gap: 6px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
  line-height: 1.7;
  color: var(--yz-text);
}

.page-about .ab-node__list li {
  position: relative;
  padding-left: 16px;
}

.page-about .ab-node__list li::before {
  content: "";
  position: absolute;
  top: 0.72em;
  left: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--yz-cyan);
}

.page-about .yz-disclosure__trigger {
  font-family: inherit;
  cursor: pointer;
}

@media (min-width: 900px) {
  .page-about .ab-timeline {
    padding-left: 0;
    gap: 32px;
  }

  .page-about .ab-timeline::before {
    left: 50%;
    margin-left: -1px;
  }

  .page-about .ab-node {
    width: calc(50% - 46px);
  }

  .page-about .ab-node:nth-child(odd) {
    align-self: flex-start;
  }

  .page-about .ab-node:nth-child(even) {
    align-self: flex-end;
  }

  .page-about .ab-node:nth-child(odd) .ab-node__dot {
    left: auto;
    right: -56px;
  }

  .page-about .ab-node:nth-child(even) .ab-node__dot {
    left: -56px;
  }
}

@media (min-width: 1080px) {
  .page-about .ab-journey {
    grid-template-columns: 190px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .ab-toc {
    position: sticky;
    top: 104px;
  }

  .page-about .ab-toc__list {
    flex-direction: column;
    gap: 4px;
  }

  .page-about .ab-toc__link {
    border-radius: 0 999px 999px 0;
    border-left: 2px solid var(--yz-line);
    border-top-color: transparent;
    border-right-color: transparent;
    border-bottom-color: transparent;
    padding: 8px 12px 8px 14px;
  }

  .page-about .ab-toc__link:hover,
  .page-about .ab-toc__link:focus-visible {
    border-left-color: var(--yz-gold);
    border-top-color: transparent;
    border-right-color: transparent;
    border-bottom-color: transparent;
  }
}

/* ---------- 左右分栏 ---------- */
.page-about .ab-split {
  display: grid;
  gap: clamp(24px, 4vw, 52px);
  align-items: center;
}

.page-about .ab-split__copy .yz-prose {
  max-width: 60ch;
}

.page-about .ab-split__media {
  margin: 0;
}

.page-about .ab-split__media .yz-media {
  width: 100%;
  overflow: hidden;
  border-radius: var(--yz-radius);
  border: 1px solid var(--yz-line);
}

.page-about .ab-split__media .yz-media__img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-about .ab-split__media .yz-media__caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--yz-muted);
}

@media (min-width: 900px) {
  .page-about .ab-split {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 1fr);
  }
}

/* ---------- 场景标签 ---------- */
.page-about .ab-scenes {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-scenes li {
  padding: 7px 15px;
  border-radius: 999px;
  border: 1px solid rgba(124, 58, 237, 0.45);
  background: rgba(124, 58, 237, 0.16);
  font-size: 13px;
  color: var(--yz-text);
}

/* ---------- 团队数据条 ---------- */
.page-about .ab-figures {
  display: grid;
  gap: 12px;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-figure {
  padding: 14px 16px;
  border-radius: var(--yz-radius-sm);
  background: var(--yz-glass-soft);
  border: 1px solid var(--yz-line);
  border-left: 2px solid var(--yz-cyan);
}

.page-about .ab-figure__num {
  display: block;
  font-size: clamp(18px, 3vw, 22px);
  color: var(--yz-gold-light);
  letter-spacing: 0.02em;
}

.page-about .ab-figure__text {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--yz-muted);
}

.page-about .ab-inline-link {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 28px);
}

@media (min-width: 600px) {
  .page-about .ab-figures {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 会员卡片 ---------- */
.page-about .ab-plans {
  display: grid;
  gap: 16px;
  margin-top: clamp(24px, 4vw, 40px);
}

.page-about .ab-plan {
  position: relative;
  padding: 24px 22px 26px;
  border-radius: var(--yz-radius);
  border: 1px solid var(--yz-line);
  background: linear-gradient(180deg, rgba(27, 18, 54, 0.94) 0%, rgba(11, 11, 20, 0.92) 100%);
  transition: transform 0.28s ease, border-color 0.28s ease, box-shadow 0.28s ease;
}

.page-about .ab-plan:hover,
.page-about .ab-plan:focus-within {
  transform: translateY(-6px);
  border-color: rgba(245, 196, 81, 0.52);
  box-shadow: var(--yz-glow-violet);
}

.page-about .ab-plan--featured {
  border-color: rgba(245, 196, 81, 0.42);
  background: linear-gradient(180deg, rgba(124, 58, 237, 0.24) 0%, rgba(11, 11, 20, 0.94) 100%);
}

.page-about .ab-plan__rank {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.26em;
  color: var(--yz-magenta);
}

.page-about .ab-plan__name {
  margin: 12px 0 6px;
  font-size: clamp(20px, 3.4vw, 23px);
  line-height: 1.3;
}

.page-about .ab-plan__for {
  margin: 0 0 18px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--yz-muted);
}

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

.page-about .ab-plan__list li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.7;
}

.page-about .ab-plan__list li::before {
  content: "";
  position: absolute;
  top: 0.62em;
  left: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--yz-gold);
  box-shadow: 0 0 10px rgba(245, 196, 81, 0.5);
}

@media (min-width: 780px) {
  .page-about .ab-plans {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
    gap: 20px;
  }

  .page-about .ab-plan--featured {
    transform: translateY(-10px);
  }

  .page-about .ab-plan--featured:hover,
  .page-about .ab-plan--featured:focus-within {
    transform: translateY(-16px);
  }
}

/* ---------- 宽幅图带 ---------- */
.page-about .ab-wide {
  margin: 0;
  padding: clamp(6px, 2vw, 18px) 0;
}

.page-about .ab-wide .yz-media {
  width: 100%;
  overflow: hidden;
  border-radius: var(--yz-radius);
  border: 1px solid var(--yz-line);
}

.page-about .ab-wide .yz-media__img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-about .ab-wide .yz-media__caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--yz-muted);
}

/* ---------- 合作生态 ---------- */
.page-about .ab-tabs__bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .ab-tabs__panel {
  margin-top: 18px;
  padding: clamp(18px, 3vw, 28px);
  border-radius: var(--yz-radius);
  background: var(--yz-glass);
  border: 1px solid var(--yz-line);
  backdrop-filter: blur(10px);
}

.page-about .ab-tabs__panel .yz-h3 {
  margin: 0 0 10px;
  font-size: clamp(18px, 3.2vw, 21px);
  line-height: 1.4;
}

.page-about .ab-tabs__panel .yz-prose {
  margin: 0;
  color: var(--yz-muted);
  font-size: 15px;
}

.page-about .ab-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-tags li {
  padding: 7px 14px;
  border-radius: var(--yz-radius-sm);
  border: 1px solid rgba(34, 211, 238, 0.35);
  background: rgba(34, 211, 238, 0.10);
  font-size: 13px;
  color: var(--yz-text);
}

/* ---------- 服务标准 ---------- */
.page-about .ab-standards {
  display: grid;
  gap: 16px;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-standard {
  padding: clamp(20px, 3vw, 26px);
  border-radius: var(--yz-radius);
  border: 1px solid var(--yz-line);
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.10) 0%, rgba(124, 58, 237, 0.12) 100%);
}

.page-about .ab-standard__index {
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--yz-cyan);
}

.page-about .ab-standard__title {
  margin: 10px 0 8px;
  font-size: clamp(18px, 3vw, 20px);
  line-height: 1.4;
}

.page-about .ab-standard__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--yz-muted);
}

@media (min-width: 700px) {
  .page-about .ab-standards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 收束 ---------- */
.page-about .ab-cta {
  padding: clamp(40px, 7vw, 86px) 0 clamp(48px, 8vw, 96px);
  border-top: 1px solid var(--yz-line);
  background:
    radial-gradient(90% 130% at 50% 0%, rgba(124, 58, 237, 0.34) 0%, rgba(11, 11, 20, 0) 72%),
    var(--yz-black);
}

.page-about .ab-cta__inner {
  text-align: center;
}

.page-about .ab-cta__inner .yz-h2 {
  margin: 0 0 12px;
}

.page-about .ab-cta__inner .yz-prose {
  margin: 0 auto;
  max-width: 52ch;
  color: var(--yz-muted);
}

.page-about .ab-cta__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: clamp(22px, 3.4vw, 32px);
}

/* ---------- 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .ab-plan,
  .page-about .ab-toc__link {
    transition: none;
  }

  .page-about .ab-plan:hover,
  .page-about .ab-plan:focus-within,
  .page-about .ab-plan--featured:hover,
  .page-about .ab-plan--featured:focus-within {
    transform: none;
  }
}