.page-about {
  --about-line: rgba(18, 70, 110, 0.14);
  --about-line-strong: rgba(18, 70, 110, 0.3);
  --about-radius: 26px;
  display: block;
  overflow-x: clip;
}

.page-about .yb-crumb {
  margin: 18px 0 14px;
}

/* ---------- 首屏 ---------- */
.page-about .yb-hero {
  position: relative;
  overflow: hidden;
  border-radius: 0 0 var(--r-lg) var(--r-lg);
  background: linear-gradient(135deg, #082B45 0%, #12466E 58%, #0C1D2E 100%);
  padding: clamp(34px, 6vw, 72px) 0 clamp(38px, 6vw, 68px);
}

.page-about .yb-hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(35, 227, 198, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(35, 227, 198, 0.07) 1px, transparent 1px);
  background-size: 46px 46px;
  pointer-events: none;
}

.page-about .yb-hero__glow {
  position: absolute;
  right: -14%;
  top: -38%;
  width: 560px;
  height: 560px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(35, 227, 198, 0.22), transparent 66%);
  pointer-events: none;
}

.page-about .yb-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(26px, 4vw, 46px);
}

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

.page-about .yb-eyebrow-light {
  color: rgba(35, 227, 198, 0.9);
}

.page-about .yb-hero__title {
  color: #FFFFFF;
  margin: 12px 0 16px;
  max-width: 20ch;
  letter-spacing: -0.02em;
}

.page-about .yb-hero__lead {
  color: rgba(245, 242, 234, 0.86);
  max-width: 58ch;
  margin: 0 0 18px;
}

.page-about .yb-notice {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
  align-items: baseline;
  margin: 0 0 22px;
  padding: 10px 16px;
  max-width: 62ch;
  border-radius: var(--r-pill);
  background: rgba(35, 227, 198, 0.1);
  border: 1px solid rgba(35, 227, 198, 0.3);
  color: rgba(245, 242, 234, 0.9);
  font-size: 14px;
  line-height: 1.6;
}

.page-about .yb-notice .yx-mono {
  color: var(--cyan);
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-about .yb-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .yb-btn-cyan {
  background: var(--cyan);
  border-color: transparent;
  color: #06252F;
  font-weight: 700;
}

.page-about .yb-btn-outline {
  background: transparent;
  border-color: rgba(245, 242, 234, 0.4);
  color: var(--paper);
}

.page-about .yb-btn-outline:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

.page-about .yb-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(35, 227, 198, 0.2);
  border: 1px solid rgba(35, 227, 198, 0.2);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .yb-metric {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  min-height: 94px;
  padding: 18px 16px;
  background: rgba(6, 30, 49, 0.72);
}

.page-about .yb-metric__num {
  font-size: clamp(26px, 4vw, 34px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-about .yb-metric__num em {
  font-style: normal;
  font-size: 0.5em;
  margin-left: 2px;
  color: rgba(35, 227, 198, 0.78);
}

.page-about .yb-metric__label {
  font-size: 13px;
  letter-spacing: 0.02em;
  color: rgba(245, 242, 234, 0.72);
}

/* ---------- 主体骨架 ---------- */
.page-about .yb-body {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  padding-top: clamp(40px, 6vw, 74px);
  padding-bottom: clamp(20px, 3vw, 32px);
}

@media (min-width: 1000px) {
  .page-about .yb-body {
    grid-template-columns: 200px minmax(0, 1fr);
    column-gap: clamp(32px, 4vw, 64px);
    align-items: start;
  }
}

.page-about .yb-index {
  min-width: 0;
}

.page-about .yb-index__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--grayblue);
}

.page-about .yb-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .yb-index__list::-webkit-scrollbar {
  display: none;
}

.page-about .yb-index__list li {
  flex: 0 0 auto;
}

.page-about .yb-index__list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: var(--r-pill);
  border: 1px solid var(--about-line);
  background: var(--card);
  color: var(--ink);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.page-about .yb-index__list a:hover {
  border-color: var(--cyan);
  color: var(--deep);
}

.page-about .yb-index__no {
  font-size: 11px;
  color: var(--grayblue);
}

@media (min-width: 1000px) {
  .page-about .yb-index {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-about .yb-index__list {
    display: block;
    overflow: visible;
    border-left: 1px solid var(--about-line);
  }

  .page-about .yb-index__list li {
    display: block;
    flex: none;
  }

  .page-about .yb-index__list a {
    display: flex;
    align-items: baseline;
    gap: 10px;
    padding: 10px 0 10px 16px;
    border: 0;
    border-radius: 0;
    background: transparent;
    white-space: normal;
    line-height: 1.55;
    position: relative;
  }

  .page-about .yb-index__list a::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    width: 6px;
    height: 1px;
    background: var(--about-line-strong);
    transform: translateY(-50%);
    transition: width 0.2s ease, background 0.2s ease;
  }

  .page-about .yb-index__list a:hover {
    background: transparent;
    border-color: transparent;
  }

  .page-about .yb-index__list a:hover::before {
    width: 12px;
    background: var(--cyan);
  }
}

.page-about .yb-flow {
  min-width: 0;
}

/* ---------- 区块 ---------- */
.page-about .yb-block {
  padding-block: clamp(26px, 3.6vw, 44px);
  border-top: 1px solid var(--about-line);
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-about .yb-block:first-child {
  border-top: 0;
  padding-top: 0;
}

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

.page-about .yb-block--mist {
  background: var(--mist);
  border-top-color: transparent;
  border-radius: var(--r-lg);
  padding: clamp(22px, 3.4vw, 40px);
  margin-block: clamp(6px, 1vw, 12px);
}

.page-about .yb-block__head {
  max-width: 62ch;
  margin-bottom: clamp(18px, 2.4vw, 26px);
}

.page-about .yx-eyebrow + .yx-title {
  margin-top: 12px;
}

.page-about .yb-block__head .yx-lead {
  margin-top: 12px;
}

/* ---------- 图文分栏 ---------- */
.page-about .yb-split {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
}

@media (min-width: 860px) {
  .page-about .yb-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }
}

.page-about .yb-split__text,
.page-about .yb-split__side {
  min-width: 0;
}

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

/* ---------- 栏目体系 ---------- */
.page-about .yb-panel-head {
  display: grid;
  gap: clamp(16px, 2.4vw, 28px);
  margin-bottom: clamp(20px, 2.8vw, 30px);
}

@media (min-width: 860px) {
  .page-about .yb-panel-head {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
  }
}

.page-about .yb-panel-head__text {
  max-width: 56ch;
}

.page-about .yb-panel-head__text .yx-lead {
  margin-top: 12px;
}

.page-about .yb-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 clamp(16px, 2.4vw, 24px);
}

.page-about .yx-chip[aria-pressed="true"] {
  background: var(--deep);
  border-color: var(--deep);
  color: var(--paper);
}

.page-about .yb-bands {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .yb-band {
  --about-band-accent: var(--cyan);
  position: relative;
  display: grid;
  gap: 14px;
  padding: 16px 18px;
  border-radius: var(--r-md);
  border: 1px solid var(--about-line);
  background: var(--card);
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.page-about .yb-band::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14%;
  bottom: 14%;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: var(--about-band-accent);
}

.page-about .yb-band:hover {
  transform: translateY(-2px);
  border-color: var(--about-line-strong);
}

@media (min-width: 760px) {
  .page-about .yb-band {
    grid-template-columns: 190px minmax(0, 1fr);
    align-items: center;
    gap: 24px;
    padding: 18px 22px;
  }
}

.page-about .yb-band--go {
  --about-band-accent: var(--cyan);
  background: linear-gradient(90deg, rgba(35, 227, 198, 0.14), var(--card) 58%);
}

.page-about .yb-band--cross {
  --about-band-accent: var(--cyan-deep);
  background: linear-gradient(90deg, rgba(27, 111, 168, 0.14), var(--card) 58%);
}

.page-about .yb-band--park {
  --about-band-accent: var(--orange);
  background: linear-gradient(90deg, rgba(255, 138, 61, 0.15), var(--card) 58%);
}

.page-about .yb-band--life {
  --about-band-accent: var(--grayblue);
  background: linear-gradient(90deg, rgba(90, 107, 124, 0.13), var(--card) 58%);
}

.page-about .yb-band__label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.page-about .yb-band__label strong {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .yb-band__label span {
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--grayblue);
}

.page-about .yb-band__items {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  min-width: 0;
}

.page-about .yb-band__items li {
  padding: 7px 14px;
  border-radius: var(--r-pill);
  background: #FFFFFF;
  border: 1px solid var(--about-line);
  font-size: 13.5px;
  color: var(--ink);
  white-space: nowrap;
}

/* ---------- 团队数据 ---------- */
.page-about .yb-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-about .yb-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 14px;
  border-radius: var(--r-sm);
  background: var(--mist);
}

.page-about .yb-stat b {
  font-size: clamp(22px, 2.6vw, 28px);
  font-weight: 700;
  line-height: 1;
  color: var(--deep);
  letter-spacing: -0.02em;
}

.page-about .yb-stat b em {
  font-style: normal;
  font-size: 0.55em;
  margin-left: 2px;
  color: var(--grayblue);
}

.page-about .yb-stat span {
  font-size: 13px;
  color: var(--grayblue);
}

/* ---------- 本地服务 ---------- */
.page-about .yb-cities {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
}

.page-about .yb-city {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 14px 16px;
  border-radius: var(--r-sm);
  background: var(--card);
  border: 1px solid var(--about-line);
  border-left: 3px solid var(--cyan);
}

.page-about .yb-city strong {
  font-size: 17px;
  color: var(--ink);
}

.page-about .yb-city span {
  font-size: 12px;
  color: var(--grayblue);
}

.page-about .yb-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--grayblue);
}

/* ---------- 迭代取舍 ---------- */
.page-about .yb-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  counter-reset: yb-step;
}

.page-about .yb-step {
  position: relative;
  padding: clamp(16px, 2.2vw, 22px) clamp(16px, 2.4vw, 24px) clamp(16px, 2.2vw, 22px) clamp(52px, 6vw, 70px);
  border-radius: var(--r-md);
  background: var(--card);
  border: 1px solid var(--about-line);
}

.page-about .yb-step::after {
  content: "";
  position: absolute;
  left: 0;
  top: 18%;
  bottom: 18%;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: linear-gradient(180deg, var(--cyan), var(--cyan-deep));
}

.page-about .yb-step__no {
  position: absolute;
  left: clamp(16px, 2.2vw, 22px);
  top: clamp(19px, 2.5vw, 25px);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--cyan-deep);
}

.page-about .yb-step h3 {
  margin: 0 0 8px;
  color: var(--ink);
}

.page-about .yb-step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--grayblue);
}

/* ---------- 结尾去向 ---------- */
.page-about .yb-next {
  position: relative;
  overflow: hidden;
  margin: clamp(30px, 5vw, 60px) 0 clamp(40px, 6vw, 72px);
  padding: clamp(26px, 4vw, 48px);
  border-radius: var(--r-lg);
  background: linear-gradient(135deg, #082B45 0%, #12466E 100%);
  color: var(--paper);
}

.page-about .yb-next::after {
  content: "";
  position: absolute;
  right: -90px;
  top: -90px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(35, 227, 198, 0.22), transparent 70%);
  pointer-events: none;
}

.page-about .yb-next__head {
  position: relative;
  z-index: 1;
}

.page-about .yb-next .yx-title {
  color: #FFFFFF;
  margin-top: 12px;
}

.page-about .yb-next__list {
  position: relative;
  z-index: 1;
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

@media (min-width: 820px) {
  .page-about .yb-next__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .yb-next__list a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  height: 100%;
  padding: 14px 18px;
  border-radius: var(--r-sm);
  background: rgba(245, 242, 234, 0.06);
  border: 1px solid rgba(35, 227, 198, 0.24);
  color: var(--paper);
  font-size: 15px;
  line-height: 1.6;
  text-decoration: none;
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.page-about .yb-next__list a:hover {
  border-color: var(--cyan);
  background: rgba(35, 227, 198, 0.12);
  transform: translateY(-2px);
}

.page-about .yb-next__list .yx-mono {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

/* ---------- 动效收敛 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .yb-band,
  .page-about .yb-next__list a,
  .page-about .yb-index__list a,
  .page-about .yb-index__list a::before {
    transition-duration: 0.01ms;
    transition-property: opacity;
  }

  .page-about .yb-band:hover,
  .page-about .yb-next__list a:hover {
    transform: none;
  }
}