.page-about {
  --about-hair: rgba(154, 166, 188, .18);
  --about-track: rgba(215, 168, 78, .30);
  overflow-x: clip;
}

/* ---------- 通用小工具 ---------- */
.page-about .about-sr {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.page-about .about-crumbs {
  padding-top: 18px;
  padding-bottom: 4px;
}

.page-about .about-head {
  max-width: 780px;
  margin-bottom: 34px;
}

.page-about .about-head__lede {
  margin-top: 14px;
  color: var(--body-text);
  font-size: 16px;
  line-height: 1.8;
  max-width: 36ch;
}

/* ---------- 01 首屏 ---------- */
.page-about .about-hero {
  padding-top: 26px;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 34px;
}

.page-about .about-hero__lede {
  margin-top: 20px;
  color: var(--body-text);
  font-size: 16px;
  line-height: 1.85;
  max-width: 40ch;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* 首屏微组件：团队构成切换 */
.page-about .about-team-widget {
  position: relative;
  padding: 26px 22px 24px;
  background:
    radial-gradient(120% 90% at 100% 0%, rgba(58, 208, 222, .10), transparent 62%),
    linear-gradient(160deg, var(--ink-2) 0%, rgba(20, 31, 58, .76) 100%);
  border: 1px solid var(--line);
}

.page-about .about-team-widget__hint {
  margin: 12px 0 18px;
  color: var(--mist);
  font-size: 14px;
  line-height: 1.7;
}

.page-about .about-team-widget__tabs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin-bottom: 18px;
}

.page-about .about-team-widget__tabs label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: center;
  justify-content: center;
  min-height: 66px;
  padding: 8px 4px;
  border: 1px solid var(--about-hair);
  background: rgba(5, 8, 15, .38);
  cursor: pointer;
  text-align: center;
  transition: border-color .16s var(--ease), background-color .16s var(--ease), transform .12s var(--ease);
}

.page-about .about-tab__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 22px;
  line-height: 1;
  color: var(--gold);
}

.page-about .about-tab__name {
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--mist);
}

.page-about .about-team-widget__tabs label:hover {
  border-color: var(--gold);
  background: rgba(215, 168, 78, .10);
}

.page-about #ts1:checked ~ .about-team-widget__tabs label[for="ts1"],
.page-about #ts2:checked ~ .about-team-widget__tabs label[for="ts2"],
.page-about #ts3:checked ~ .about-team-widget__tabs label[for="ts3"] {
  border-color: var(--gold-hi);
  background: linear-gradient(180deg, rgba(215, 168, 78, .22), rgba(215, 168, 78, .06));
}

.page-about #ts1:checked ~ .about-team-widget__tabs label[for="ts1"] .about-tab__name,
.page-about #ts2:checked ~ .about-team-widget__tabs label[for="ts2"] .about-tab__name,
.page-about #ts3:checked ~ .about-team-widget__tabs label[for="ts3"] .about-tab__name {
  color: var(--ivory);
}

.page-about .about-team-widget__panes {
  border-top: 1px solid var(--about-hair);
  padding-top: 16px;
  min-height: 132px;
}

.page-about .about-team-widget__pane {
  display: none;
}

.page-about .about-team-widget__pane p {
  color: var(--body-text);
  font-size: 15px;
  line-height: 1.8;
}

.page-about #ts1:checked ~ .about-team-widget__panes .about-team-widget__pane:nth-child(1),
.page-about #ts2:checked ~ .about-team-widget__panes .about-team-widget__pane:nth-child(2),
.page-about #ts3:checked ~ .about-team-widget__panes .about-team-widget__pane:nth-child(3) {
  display: block;
  animation: about-fade .24s var(--ease) both;
}

@keyframes about-fade {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- 02 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  overflow: hidden;
}

.page-about .about-timeline__glow {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.page-about .about-timeline__glow img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .16;
}

.page-about .about-timeline__glow::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, var(--ink) 0%, rgba(11, 18, 36, .70) 45%, var(--ink) 100%);
}

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

.page-about .about-timeline__track {
  position: relative;
  padding-left: 46px;
}

.page-about .about-timeline__track::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--gold) 10%, var(--gold) 90%, transparent);
  opacity: .5;
}

.page-about .about-node {
  position: relative;
  margin-bottom: 20px;
}

.page-about .about-node:last-child {
  margin-bottom: 0;
}

.page-about .about-node__num {
  position: absolute;
  left: -46px;
  top: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border: 1px solid var(--gold);
  background: var(--void);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--gold);
  z-index: 2;
}

.page-about .about-node__box {
  padding: 0;
  background: linear-gradient(150deg, rgba(20, 31, 58, .92), rgba(11, 18, 36, .88));
  border: 1px solid var(--about-hair);
}

.page-about .about-node__box[open] {
  border-color: var(--line);
}

.page-about .about-node__box summary {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 6px 14px;
  align-items: center;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
}

.page-about .about-node__box summary::-webkit-details-marker {
  display: none;
}

.page-about .about-node__year {
  grid-column: 1;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--cyan);
}

.page-about .about-node__title {
  grid-column: 1;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ivory);
}

.page-about .about-node__chev {
  grid-column: 2;
  grid-row: 1 / span 2;
  position: relative;
  width: 18px;
  height: 18px;
  border: 1px solid var(--gold);
  border-radius: 50%;
  flex: none;
}

.page-about .about-node__chev::before,
.page-about .about-node__chev::after {
  content: "";
  position: absolute;
  background: var(--gold);
  transition: transform .22s var(--ease), opacity .22s var(--ease);
}

.page-about .about-node__chev::before {
  left: 4px;
  right: 4px;
  top: 8px;
  height: 1px;
}

.page-about .about-node__chev::after {
  top: 4px;
  bottom: 4px;
  left: 8px;
  width: 1px;
}

.page-about .about-node__box[open] .about-node__chev::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-about .about-node__content {
  padding: 0 20px 20px;
  border-top: 1px solid var(--about-hair);
  padding-top: 14px;
}

.page-about .about-node__content p {
  color: var(--body-text);
  font-size: 15px;
  line-height: 1.85;
  max-width: 46ch;
}

/* ---------- 横向数据带 ---------- */
.page-about .about-band {
  background: linear-gradient(90deg, rgba(23, 185, 138, .12) 0%, rgba(58, 208, 222, .10) 48%, rgba(225, 68, 95, .12) 100%);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 26px 0;
}

.page-about .about-band__inner {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px 16px;
}

.page-about .about-band__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-band__item .data-number {
  font-size: 30px;
  line-height: 1.1;
  color: var(--ivory);
}

.page-about .about-band__label {
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--mist);
}

/* ---------- 03 流程 ---------- */
.page-about .about-flow__track {
  display: grid;
  gap: 0;
  counter-reset: aboutflow;
}

.page-about .about-flow__step {
  position: relative;
  padding: 20px 0 20px 40px;
  border-left: 1px solid var(--about-hair);
  margin-left: 12px;
}

.page-about .about-flow__step:first-child {
  padding-top: 0;
}

.page-about .about-flow__step:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .about-flow__no {
  position: absolute;
  left: -14px;
  top: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: var(--ink-2);
  border: 1px solid var(--gold);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--gold);
}

.page-about .about-flow__step:first-child .about-flow__no {
  top: 0;
}

.page-about .about-flow__name {
  font-size: 18px;
  font-weight: 700;
  color: var(--ivory);
  margin-bottom: 8px;
}

.page-about .about-flow__step p {
  color: var(--body-text);
  font-size: 15px;
  line-height: 1.8;
  max-width: 42ch;
}

/* ---------- 04 团队分工 ---------- */
.page-about .about-team__layout {
  position: relative;
  display: grid;
  gap: 22px;
}

.page-about .about-team__rail {
  display: grid;
  gap: 8px;
}

.page-about .about-team__tab {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 52px;
  padding: 12px 16px;
  border: 1px solid var(--about-hair);
  background: rgba(20, 31, 58, .55);
  cursor: pointer;
  transition: border-color .16s var(--ease), background-color .16s var(--ease);
}

.page-about .about-team__tab-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--body-text);
}

.page-about .about-team__tab-count {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--gold);
}

.page-about .about-team__tab:hover {
  border-color: var(--gold);
}

.page-about #tm1:checked ~ .about-team__tab[for="tm1"],
.page-about #tm2:checked ~ .about-team__tab[for="tm2"],
.page-about #tm3:checked ~ .about-team__tab[for="tm3"] {
  border-color: var(--gold-hi);
  background: linear-gradient(90deg, rgba(215, 168, 78, .20), rgba(215, 168, 78, .02));
}

.page-about #tm1:checked ~ .about-team__tab[for="tm1"] .about-team__tab-name,
.page-about #tm2:checked ~ .about-team__tab[for="tm2"] .about-team__tab-name,
.page-about #tm3:checked ~ .about-team__tab[for="tm3"] .about-team__tab-name {
  color: var(--ivory);
}

.page-about .about-team__media {
  border: 1px solid var(--about-hair);
}

.page-about .about-team__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-team__panel {
  position: relative;
  padding: 24px 20px;
  background: linear-gradient(160deg, rgba(20, 31, 58, .90), rgba(11, 18, 36, .82));
  border: 1px solid var(--about-hair);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}

.page-about .about-team__pane {
  display: none;
}

.page-about #tm1:checked ~ .about-team__panel .about-team__pane:nth-child(1),
.page-about #tm2:checked ~ .about-team__panel .about-team__pane:nth-child(2),
.page-about #tm3:checked ~ .about-team__panel .about-team__pane:nth-child(3) {
  display: block;
  animation: about-fade .24s var(--ease) both;
}

.page-about .about-team__pane h3 {
  font-size: 19px;
  font-weight: 900;
  color: var(--ivory);
  margin-bottom: 12px;
}

.page-about .about-team__pane > p {
  color: var(--body-text);
  font-size: 15px;
  line-height: 1.85;
  max-width: 46ch;
}

.page-about .about-team__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-team__facts li {
  padding: 6px 12px;
  border: 1px solid var(--line);
  background: rgba(215, 168, 78, .07);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--gold-hi);
}

/* ---------- 05 合作生态 ---------- */
.page-about .about-eco__layout {
  position: relative;
  display: grid;
  gap: 20px;
}

.page-about .about-eco__bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-eco__bar label {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 18px;
  border: 1px solid var(--about-hair);
  background: rgba(20, 31, 58, .55);
  font-size: 14px;
  color: var(--body-text);
  cursor: pointer;
  transition: border-color .16s var(--ease), background-color .16s var(--ease), color .16s var(--ease);
}

.page-about .about-eco__bar label:hover {
  border-color: var(--gold);
  color: var(--ivory);
}

.page-about #ec-all:checked ~ .about-eco__bar label[for="ec-all"],
.page-about #ec-supply:checked ~ .about-eco__bar label[for="ec-supply"],
.page-about #ec-verify:checked ~ .about-eco__bar label[for="ec-verify"],
.page-about #ec-device:checked ~ .about-eco__bar label[for="ec-device"] {
  border-color: var(--gold-hi);
  background: linear-gradient(180deg, rgba(215, 168, 78, .22), rgba(215, 168, 78, .04));
  color: var(--ivory);
}

.page-about .about-eco__list {
  display: grid;
  gap: 14px;
}

.page-about .eco-item {
  padding: 18px 20px;
  background: rgba(20, 31, 58, .62);
  border: 1px solid var(--about-hair);
  border-left: 2px solid var(--cyan);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
}

.page-about .eco-item--verify {
  border-left-color: var(--jade);
}

.page-about .eco-item--device {
  border-left-color: var(--ruby);
}

.page-about .eco-item__tag {
  display: inline-block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--mist);
}

.page-about .eco-item__name {
  font-size: 16px;
  font-weight: 700;
  color: var(--ivory);
  margin-bottom: 8px;
}

.page-about .eco-item p {
  color: var(--body-text);
  font-size: 14px;
  line-height: 1.8;
}

.page-about #ec-supply:checked ~ .about-eco__list .eco-item:not(.eco-item--supply),
.page-about #ec-verify:checked ~ .about-eco__list .eco-item:not(.eco-item--verify),
.page-about #ec-device:checked ~ .about-eco__list .eco-item:not(.eco-item--device) {
  display: none;
}

/* ---------- 06 陕西区域 ---------- */
.page-about .about-region__banner {
  border: 1px solid var(--line);
  margin-bottom: 30px;
}

.page-about .about-region__banner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-region__body {
  max-width: 62ch;
}

.page-about .about-region__body p {
  margin-top: 16px;
  color: var(--body-text);
  font-size: 16px;
  line-height: 1.85;
}

.page-about .about-region__link {
  display: inline-block;
  margin-top: 20px;
  padding-bottom: 3px;
  color: var(--cyan);
  font-size: 15px;
  border-bottom: 1px solid rgba(58, 208, 222, .45);
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.page-about .about-region__link:hover {
  color: var(--gold-hi);
  border-color: var(--gold-hi);
}

/* ---------- 07 下一步 ---------- */
.page-about .about-cta__box {
  padding: 34px 24px;
  background:
    radial-gradient(90% 130% at 0% 0%, rgba(215, 168, 78, .16), transparent 60%),
    linear-gradient(150deg, var(--ink-2) 0%, rgba(11, 18, 36, .94) 100%);
  border: 1px solid var(--line);
}

.page-about .about-cta__box p {
  margin-top: 16px;
  color: var(--body-text);
  font-size: 16px;
  line-height: 1.85;
  max-width: 52ch;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-band__inner {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-team-widget {
    padding: 30px 28px 28px;
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-hero__lede {
    font-size: 17px;
  }

  .page-about .about-team-widget {
    margin-top: 6px;
  }

  /* 时间轴左右交替 */
  .page-about .about-timeline__track {
    padding-left: 0;
  }

  .page-about .about-timeline__track::before {
    left: 50%;
    top: 0;
    bottom: 0;
  }

  .page-about .about-node {
    width: 50%;
    padding-right: 52px;
    margin-bottom: 26px;
  }

  .page-about .about-node:nth-child(even) {
    margin-left: 50%;
    padding-right: 0;
    padding-left: 52px;
  }

  .page-about .about-node__num {
    top: 20px;
    left: auto;
    right: -52px;
  }

  .page-about .about-node:nth-child(even) .about-node__num {
    right: auto;
    left: -52px;
  }

  /* 流程横向轨道 */
  .page-about .about-flow__track {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0;
    border-top: 1px solid var(--about-hair);
    padding-top: 26px;
  }

  .page-about .about-flow__step {
    padding: 0 18px 0 0;
    margin-left: 0;
    border-left: 0;
    border-right: 1px solid var(--about-hair);
  }

  .page-about .about-flow__step:last-child {
    border-right-color: transparent;
    padding-right: 0;
  }

  .page-about .about-flow__step:not(:first-child) {
    padding-left: 18px;
  }

  .page-about .about-flow__no {
    position: static;
    margin-bottom: 14px;
  }

  .page-about .about-flow__step:first-child .about-flow__no {
    top: auto;
  }

  /* 团队分工双栏 */
  .page-about .about-team__layout {
    grid-template-columns: minmax(200px, 250px) minmax(0, 1fr);
    grid-template-rows: auto auto;
    gap: 20px 34px;
    align-items: start;
  }

  .page-about .about-team__rail {
    grid-column: 1;
    grid-row: 1 / span 2;
  }

  .page-about .about-team__media {
    grid-column: 2;
    grid-row: 1;
  }

  .page-about .about-team__panel {
    grid-column: 2;
    grid-row: 2;
    padding: 26px 28px;
  }

  /* 合作生态 */
  .page-about .about-eco__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-cta__box {
    padding: 46px 44px;
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero__grid {
    gap: 72px;
  }

  .page-about .about-team__layout {
    grid-template-columns: 280px minmax(0, 1fr);
    gap: 26px 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about #ts1:checked ~ .about-team-widget__panes .about-team-widget__pane:nth-child(1),
  .page-about #ts2:checked ~ .about-team-widget__panes .about-team-widget__pane:nth-child(2),
  .page-about #ts3:checked ~ .about-team-widget__panes .about-team-widget__pane:nth-child(3),
  .page-about #tm1:checked ~ .about-team__panel .about-team__pane:nth-child(1),
  .page-about #tm2:checked ~ .about-team__panel .about-team__pane:nth-child(2),
  .page-about #tm3:checked ~ .about-team__panel .about-team__pane:nth-child(3) {
    animation: none;
  }
}