/* ===== 页面：我们是谁 ===== */
.page-about {
  --about-shadow: 6px 6px 0 rgba(7, 17, 39, 0.72);
  background: var(--wb-indigo);
  color: var(--wb-mist);
  padding-bottom: 32px;
  overflow-x: hidden;
}

.page-about .wrap {
  padding-left: 18px;
  padding-right: 18px;
}

@media (min-width: 760px) {
  .page-about .wrap {
    padding-left: 32px;
    padding-right: 32px;
  }
}

/* 面包屑 */
.page-about .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 22px 0 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--wb-line);
}

.page-about .crumbs a {
  color: var(--wb-cyan);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 160ms var(--ease);
}

.page-about .crumbs a:hover,
.page-about .crumbs a:focus-visible {
  border-bottom-color: currentColor;
}

.page-about .crumbs [aria-current="page"] {
  color: var(--wb-mist);
}

/* 首屏 */
.page-about .about-mast {
  padding: 12px 0 42px;
}

.page-about .about-mast__kicker {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--wb-orange);
}

.page-about .about-mast__title {
  margin: 0 0 20px;
  max-width: 22ch;
  font-family: var(--font-display);
  font-weight: 890;
  font-size: clamp(28px, 6.4vw, 56px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--wb-cream);
}

.page-about .about-mast__lede {
  margin: 0 0 30px;
  max-width: 62ch;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.78;
  color: var(--wb-mist);
}

/* 首屏关键读数 */
.page-about .about-kpis {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

@media (min-width: 760px) {
  .page-about .about-kpis {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-kpi {
  position: relative;
  padding: 18px 14px 14px;
  background:
    linear-gradient(150deg, rgba(47, 227, 208, 0.14), rgba(139, 92, 246, 0.1)),
    var(--wb-indigo-deep);
  border: 2px solid var(--wb-line);
}

.page-about .about-kpi::after {
  content: "";
  position: absolute;
  top: -2px;
  left: -2px;
  width: 28px;
  height: 4px;
  background: var(--wb-red);
}

.page-about .about-kpi__row {
  display: flex;
  align-items: baseline;
  gap: 5px;
  margin: 0 0 10px;
}

.page-about .about-kpi__num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(28px, 7.4vw, 40px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--wb-cyan);
}

.page-about .about-kpi__num--violet {
  color: var(--wb-violet);
}

.page-about .about-kpi__num--orange {
  color: var(--wb-orange);
}

.page-about .about-kpi__num--cream {
  color: var(--wb-cream);
}

.page-about .about-kpi__unit {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--wb-mist);
}

.page-about .about-kpi__label {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--wb-mist);
}

/* 区块骨架 */
.page-about .about-band {
  padding: 54px 0 10px;
}

.page-about .about-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  margin-bottom: 24px;
}

.page-about .about-head__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--wb-red);
}

.page-about .about-head__title {
  flex: 1 1 260px;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 890;
  font-size: clamp(22px, 4.4vw, 34px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--wb-cream);
}

.page-about .about-head__meta {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--wb-line);
}

.page-about .about-p {
  margin: 0 0 18px;
  max-width: 66ch;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.78;
  color: var(--wb-mist);
}

.page-about .about-p a {
  color: var(--wb-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-p a:hover,
.page-about .about-p a:focus-visible {
  color: var(--wb-orange);
}

/* 三件事 */
.page-about .about-trio {
  display: grid;
  gap: 14px;
  margin: 22px 0 24px;
}

@media (min-width: 760px) {
  .page-about .about-trio {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-trio__item {
  padding: 18px 18px 16px;
  background: var(--wb-ink);
  border-left: 4px solid var(--wb-cyan);
}

.page-about .about-trio__item:nth-child(2) {
  border-left-color: var(--wb-violet);
}

.page-about .about-trio__item:nth-child(3) {
  border-left-color: var(--wb-orange);
}

.page-about .about-trio__k {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--wb-cyan);
}

.page-about .about-trio__item:nth-child(2) .about-trio__k {
  color: var(--wb-violet);
}

.page-about .about-trio__item:nth-child(3) .about-trio__k {
  color: var(--wb-orange);
}

.page-about .about-trio__t {
  margin: 0;
  font-family: var(--font-body);
  font-size: 14.5px;
  line-height: 1.74;
  color: var(--wb-mist);
}

/* 通用图注框 */
.page-about .about-figure {
  margin: 0 0 28px;
  background: var(--wb-indigo-deep);
  border: 2px solid var(--wb-brown);
  box-shadow: var(--about-shadow);
  overflow: hidden;
}

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

.page-about .about-figure figcaption {
  padding: 11px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--wb-mist);
  border-top: 1px solid var(--wb-ink);
}

/* 时间轴 */
.page-about .about-axis {
  margin: 0;
  padding: 4px 0 4px 30px;
  list-style: none;
  position: relative;
}

.page-about .about-axis::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(180deg, var(--wb-cyan), var(--wb-violet) 55%, var(--wb-orange));
}

.page-about .about-axis__item {
  position: relative;
  padding-bottom: 18px;
}

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

.page-about .about-axis__item::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 14px;
  width: 14px;
  height: 14px;
  box-sizing: border-box;
  border-radius: 50%;
  background: var(--wb-indigo);
  border: 3px solid var(--wb-red);
}

.page-about .about-axis__card {
  padding: 16px 18px;
  background: var(--wb-cream);
  color: var(--wb-brown);
  border: 2px solid var(--wb-brown);
  box-shadow: 5px 5px 0 rgba(7, 17, 39, 0.72);
  transition: transform 180ms var(--ease), box-shadow 180ms var(--ease);
}

.page-about .about-axis__card:hover {
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 rgba(7, 17, 39, 0.72);
}

.page-about .about-axis__year {
  display: inline-block;
  margin-bottom: 10px;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  background: var(--wb-red);
  color: var(--wb-cream);
}

.page-about .about-axis__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 890;
  font-size: 18px;
  line-height: 1.32;
  color: var(--wb-brown);
}

.page-about .about-axis__text {
  margin: 0;
  font-family: var(--font-body);
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--wb-brown);
}

/* 团队构成 */
.page-about .about-team {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-team__row {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas:
    "label num"
    "bar bar"
    "desc desc";
  gap: 9px 12px;
  padding: 17px 0;
  border-bottom: 1px solid var(--wb-ink);
}

.page-about .about-team__row:first-child {
  border-top: 1px solid var(--wb-ink);
}

.page-about .about-team__label {
  grid-area: label;
  font-family: var(--font-display);
  font-weight: 890;
  font-size: 17px;
  line-height: 1.3;
  color: var(--wb-cream);
}

.page-about .about-team__num {
  grid-area: num;
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 600;
  color: var(--wb-orange);
}

.page-about .about-team__bar {
  grid-area: bar;
  position: relative;
  height: 8px;
  background: var(--wb-ink);
  overflow: hidden;
}

.page-about .about-team__bar::after {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: var(--pct, 0%);
  background: var(--bar-c, var(--wb-cyan));
  transition: width 460ms var(--ease);
}

.page-about .about-team__desc {
  grid-area: desc;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.72;
  color: var(--wb-mist);
}

.page-about .about-team__row--tech {
  --pct: 42.7%;
  --bar-c: var(--wb-cyan);
}

.page-about .about-team__row--data {
  --pct: 18.8%;
  --bar-c: var(--wb-violet);
}

.page-about .about-team__row--cs {
  --pct: 22.9%;
  --bar-c: var(--wb-orange);
}

.page-about .about-team__row--other {
  --pct: 15.6%;
  --bar-c: var(--wb-red);
}

/* 机房与节点 */
.page-about .about-facility {
  display: grid;
  gap: 14px;
  margin-top: 8px;
}

@media (min-width: 760px) {
  .page-about .about-facility {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .about-facility__item {
  padding: 17px 18px;
  background: var(--wb-indigo-deep);
  border-top: 3px solid var(--wb-cyan);
}

.page-about .about-facility__item:nth-child(2) {
  border-top-color: var(--wb-violet);
}

.page-about .about-facility__item:nth-child(3) {
  border-top-color: var(--wb-orange);
}

.page-about .about-facility__item:nth-child(4) {
  border-top-color: var(--wb-red);
}

.page-about .about-facility__k {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 890;
  font-size: 16px;
  line-height: 1.32;
  color: var(--wb-cream);
}

.page-about .about-facility__v {
  margin: 0;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.74;
  color: var(--wb-mist);
}

/* 合作生态 */
.page-about .about-partner {
  display: grid;
  gap: 14px;
  margin: 0 0 24px;
}

@media (min-width: 760px) {
  .page-about .about-partner {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-partner__cell {
  padding: 20px 18px;
  background: var(--wb-cream);
  color: var(--wb-brown);
  border: 2px solid var(--wb-brown);
  box-shadow: 5px 5px 0 rgba(7, 17, 39, 0.72);
}

.page-about .about-partner__num {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(34px, 8vw, 44px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--wb-red);
}

.page-about .about-partner__cell:nth-child(2) .about-partner__num {
  color: var(--wb-violet);
}

.page-about .about-partner__cell:nth-child(3) .about-partner__num {
  color: var(--wb-orange);
}

.page-about .about-partner__label {
  display: block;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.66;
  color: var(--wb-brown);
}

/* 三条规矩 */
.page-about .about-rules {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-rules__item {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  grid-template-areas:
    "idx k"
    "idx v";
  gap: 8px 12px;
  padding: 18px 18px 16px;
  background: var(--wb-ink);
  border-left: 4px solid var(--wb-cyan);
}

.page-about .about-rules__item:nth-child(2) {
  border-left-color: var(--wb-violet);
}

.page-about .about-rules__item:nth-child(3) {
  border-left-color: var(--wb-orange);
}

.page-about .about-rules__idx {
  grid-area: idx;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--wb-orange);
}

.page-about .about-rules__item:nth-child(2) .about-rules__idx {
  color: var(--wb-violet);
}

.page-about .about-rules__item:nth-child(3) .about-rules__idx {
  color: var(--wb-cyan);
}

.page-about .about-rules__k {
  grid-area: k;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 890;
  font-size: 17px;
  line-height: 1.34;
  color: var(--wb-cream);
}

.page-about .about-rules__v {
  grid-area: v;
  margin: 0;
  font-family: var(--font-body);
  font-size: 14.5px;
  line-height: 1.74;
  color: var(--wb-mist);
}

/* 收束 */
.page-about .about-cta {
  margin-top: 40px;
  padding: 28px 22px 26px;
  background:
    linear-gradient(135deg, rgba(47, 227, 208, 0.16), rgba(139, 92, 246, 0.18)),
    var(--wb-indigo-deep);
  border: 2px solid var(--wb-cyan);
}

.page-about .about-cta__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 890;
  font-size: clamp(20px, 3.6vw, 26px);
  line-height: 1.24;
  color: var(--wb-cream);
}

.page-about .about-cta__text {
  margin: 0 0 22px;
  max-width: 62ch;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.76;
  color: var(--wb-mist);
}

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

/* 减少动态偏好 */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-axis__card,
  .page-about .about-team__bar::after {
    transition: none;
  }

  .page-about .about-axis__card:hover {
    transform: none;
  }
}