.page-about {
  --about-rule: rgba(36, 64, 92, 0.9);
  --about-panel: linear-gradient(160deg, rgba(12, 30, 48, 0.96), rgba(5, 18, 31, 0.92));
  position: relative;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  padding-top: 22px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(20px, 3.5vw, 40px) 0 clamp(26px, 4vw, 46px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -150px;
  right: -130px;
  width: min(660px, 86vw);
  aspect-ratio: 1;
  background:
    radial-gradient(circle at 62% 38%, rgba(61, 225, 240, 0.18), transparent 58%),
    radial-gradient(circle at 26% 72%, rgba(138, 92, 255, 0.15), transparent 56%),
    radial-gradient(circle at 82% 82%, rgba(44, 125, 255, 0.13), transparent 52%);
  pointer-events: none;
}

.page-about .about-hero__shell {
  position: relative;
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  align-items: start;
}

.page-about .about-hero__copy {
  max-width: 58ch;
}

.page-about .about-hero h1 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 6.2vw, 58px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-about .about-hero__lede {
  margin: 18px 0 0;
  max-width: 46ch;
  color: var(--muted);
  font-size: clamp(15px, 1.6vw, 16.5px);
  line-height: 1.85;
}

.page-about .about-hero__actions {
  margin-top: 26px;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-hero__stats {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
  border-radius: var(--r-card);
  overflow: hidden;
}

.page-about .about-hero__stat {
  margin: 0;
  padding: 16px 14px;
  background: var(--graphite);
  min-width: 0;
}

.page-about .about-hero__stat dt {
  color: var(--muted);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  line-height: 1.5;
}

.page-about .about-hero__stat dd {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  line-height: 1.3;
  color: var(--text);
}

/* ---------- 章节刻度条 ---------- */
.page-about .about-axis {
  border-top: 1px solid var(--about-rule);
  border-bottom: 1px solid var(--about-rule);
  background: rgba(12, 30, 48, 0.5);
}

.page-about .about-axis__inner {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
}

.page-about .about-axis__label {
  display: none;
  flex: none;
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--muted);
  padding-right: 12px;
  border-right: 1px solid var(--about-rule);
}

.page-about .about-axis__list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0 2px 2px;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

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

.page-about .about-axis__node {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex: none;
  padding: 8px 14px;
  border-radius: var(--r-pill);
  border: 1px solid var(--about-rule);
  color: var(--muted);
  font-size: 13.5px;
  text-decoration: none;
  white-space: nowrap;
  scroll-snap-align: start;
  transition: color var(--t-fast), border-color var(--t-fast), background var(--t-fast);
}

.page-about .about-axis__node .mono {
  font-size: 11.5px;
  color: var(--electric);
}

.page-about .about-axis__node:hover,
.page-about .about-axis__node:focus-visible {
  color: var(--text);
  border-color: rgba(61, 225, 240, 0.6);
  background: rgba(61, 225, 240, 0.08);
}

.page-about .about-axis__node:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
}

/* ---------- 01 双线产品 ---------- */
.page-about .about-lines__grid {
  margin-top: clamp(22px, 3.5vw, 38px);
  row-gap: 16px;
}

.page-about .about-lines__card {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: clamp(20px, 3vw, 28px);
  min-width: 0;
}

.page-about .about-lines__tag {
  align-self: flex-start;
  margin: 0;
  padding: 4px 10px;
  border-radius: var(--r-pill);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--neon);
  border: 1px solid rgba(61, 225, 240, 0.3);
  background: rgba(61, 225, 240, 0.09);
}

.page-about .about-lines__tag--violet {
  color: var(--violet);
  border-color: rgba(138, 92, 255, 0.35);
  background: rgba(138, 92, 255, 0.1);
}

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

.page-about .about-lines__forms li {
  display: grid;
  gap: 3px;
  padding-left: 14px;
  border-left: 2px solid var(--about-rule);
}

.page-about .about-lines__forms li:nth-child(1) {
  border-left-color: var(--lava);
}

.page-about .about-lines__forms li:nth-child(2) {
  border-left-color: var(--electric);
}

.page-about .about-lines__forms li:nth-child(3) {
  border-left-color: var(--neon);
}

.page-about .about-lines__form-name {
  font-size: 15.5px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.5;
}

.page-about .about-lines__form-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .about-lines__note {
  margin: 0;
  padding-top: 12px;
  border-top: 1px dashed rgba(159, 179, 200, 0.24);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .about-tiers {
  margin-top: clamp(26px, 4vw, 42px);
  padding: clamp(20px, 3vw, 28px);
  border-radius: var(--r-card);
  border: 1px solid var(--about-rule);
  background: linear-gradient(120deg, rgba(12, 30, 48, 0.95), rgba(5, 18, 31, 0.88));
}

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

.page-about .about-tiers__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(18px, 2.4vw, 24px);
  line-height: 1.35;
  color: var(--text);
}

.page-about .about-tiers__desc {
  margin: 0;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-tiers__list {
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 6px;
}

.page-about .about-tiers__list .tier {
  display: grid;
  gap: 6px;
  padding: 14px 6px;
  text-align: center;
  border-radius: var(--r-data);
  border: 1px solid var(--tier-color, var(--about-rule));
  background: var(--tier-bg, rgba(255, 255, 255, 0.03));
}

.page-about .about-tiers__list .tier--1 {
  --tier-color: var(--lava);
  --tier-bg: rgba(255, 107, 44, 0.12);
}

.page-about .about-tiers__list .tier--2 {
  --tier-color: var(--lava);
  --tier-bg: rgba(255, 107, 44, 0.07);
}

.page-about .about-tiers__list .tier--3 {
  --tier-color: var(--electric);
  --tier-bg: rgba(44, 125, 255, 0.12);
}

.page-about .about-tiers__list .tier--4 {
  --tier-color: var(--neon);
  --tier-bg: rgba(61, 225, 240, 0.12);
}

.page-about .about-tiers__list .tier--5 {
  --tier-color: var(--acid);
  --tier-bg: rgba(182, 255, 61, 0.12);
}

.page-about .about-tiers__code {
  font-size: 15px;
  font-weight: 700;
  color: var(--tier-color);
}

.page-about .about-tiers__label {
  font-size: 11px;
  letter-spacing: 0.02em;
  color: var(--muted);
}

.page-about .about-tiers__scale {
  margin: 14px 0 0;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 12px;
  color: var(--muted);
}

.page-about .about-tiers__scale span:nth-child(2) {
  display: none;
}

/* ---------- 02 制造与产能 ---------- */
.page-about .about-making__figure {
  margin: clamp(22px, 3.5vw, 36px) 0 0;
}

.page-about .about-making__grid {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .about-making__cell {
  padding: 18px 16px;
  min-width: 0;
}

.page-about .about-making__num {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2.6vw, 25px);
  line-height: 1.3;
  color: var(--text);
}

.page-about .about-making__cap {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 03 交付之后 ---------- */
.page-about .about-inside__seg {
  margin-top: clamp(20px, 3.2vw, 32px);
}

.page-about .about-inside__panels {
  margin-top: 18px;
}

.page-about .about-inside__panel {
  padding: clamp(20px, 3vw, 30px);
  border-radius: var(--r-card);
  border: 1px solid var(--about-rule);
  background: var(--about-panel);
}

.page-about .about-inside__body {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  align-items: start;
}

.page-about .about-inside__text {
  min-width: 0;
}

.page-about .about-inside__text p {
  margin: 12px 0 0;
  max-width: 52ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-inside__points {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 2px;
}

.page-about .about-inside__points li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 11px 0;
  border-top: 1px solid rgba(36, 64, 92, 0.72);
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
}

.page-about .about-inside__points .mono {
  font-size: 11.5px;
  color: var(--neon);
}

.page-about .about-inside__figure {
  margin: 0;
}

/* 团队构成 */
.page-about .about-team {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 16px;
}

.page-about .about-team__row {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas:
    "name num"
    "bar bar";
  gap: 6px 10px;
  align-items: center;
}

.page-about .about-team__name {
  grid-area: name;
  font-size: 14px;
  color: var(--text);
}

.page-about .about-team__num {
  grid-area: num;
  font-size: 13px;
  color: var(--muted);
}

.page-about .about-team__bar {
  grid-area: bar;
  display: block;
  height: 8px;
  border-radius: var(--r-pill);
  background: rgba(36, 64, 92, 0.85);
  overflow: hidden;
}

.page-about .about-team__fill {
  display: block;
  height: 100%;
  width: var(--w, 30%);
  border-radius: var(--r-pill);
  background: linear-gradient(90deg, var(--electric), var(--neon));
}

.page-about .about-team__row--rd {
  --w: 31%;
}

.page-about .about-team__row--mq {
  --w: 58%;
}

.page-about .about-team__row--mq .about-team__fill {
  background: linear-gradient(90deg, var(--neon), var(--acid));
}

.page-about .about-team__row--sn {
  --w: 11%;
}

.page-about .about-team__row--sn .about-team__fill {
  background: linear-gradient(90deg, var(--violet), var(--neon));
}

.page-about .about-team__tip {
  position: absolute;
  left: 0;
  bottom: calc(100% + 8px);
  z-index: 2;
  max-width: 260px;
  padding: 6px 10px;
  border-radius: 8px;
  border: 1px solid var(--about-rule);
  background: var(--glass-strong);
  color: var(--text);
  font-size: 12px;
  line-height: 1.5;
  opacity: 0;
  transform: translateY(4px);
  pointer-events: none;
  transition: opacity var(--t-fast), transform var(--t-fast);
}

.page-about .about-team__row:hover .about-team__tip,
.page-about .about-team__row:focus-within .about-team__tip {
  opacity: 1;
  transform: translateY(0);
}

/* 网点编号 */
.page-about .about-net {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(64px, 1fr));
  gap: 8px;
}

.page-about .about-net__chip {
  display: grid;
  place-items: center;
  padding: 12px 4px;
  border-radius: var(--r-data);
  border: 1px solid rgba(44, 125, 255, 0.35);
  background: rgba(44, 125, 255, 0.08);
  color: var(--electric);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.page-about .about-net__chip:nth-child(4n + 1) {
  border-color: rgba(61, 225, 240, 0.35);
  background: rgba(61, 225, 240, 0.08);
  color: var(--neon);
}

.page-about .about-net__chip:nth-child(4n + 3) {
  border-color: rgba(182, 255, 61, 0.3);
  background: rgba(182, 255, 61, 0.07);
  color: var(--acid);
}

/* ---------- 04 发展历程 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg,
    var(--neon),
    rgba(44, 125, 255, 0.7) 40%,
    rgba(255, 107, 44, 0.6) 68%,
    rgba(182, 255, 61, 0.75));
  opacity: 0.55;
}

.page-about .about-path__item {
  position: relative;
  padding: 0 0 clamp(22px, 3vw, 32px) 40px;
}

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

.page-about .about-path__dot {
  position: absolute;
  left: 0;
  top: 4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid var(--ink);
  background: var(--electric);
  box-shadow: 0 0 0 3px rgba(44, 125, 255, 0.16);
}

.page-about .about-path__item--start .about-path__dot {
  background: var(--neon);
  box-shadow: 0 0 0 3px rgba(61, 225, 240, 0.2), 0 0 14px rgba(61, 225, 240, 0.55);
}

.page-about .about-path__item--build .about-path__dot {
  background: var(--lava);
  box-shadow: 0 0 0 3px rgba(255, 107, 44, 0.18);
}

.page-about .about-path__item--now .about-path__dot {
  background: var(--acid);
  box-shadow: 0 0 0 3px rgba(182, 255, 61, 0.2), 0 0 14px rgba(182, 255, 61, 0.5);
}

.page-about .about-path__era {
  display: inline-block;
  margin: 0;
  padding: 3px 10px;
  border-radius: var(--r-pill);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--neon);
  border: 1px solid rgba(61, 225, 240, 0.26);
  background: rgba(61, 225, 240, 0.09);
}

.page-about .about-path__item--build .about-path__era {
  color: var(--lava);
  border-color: rgba(255, 107, 44, 0.3);
  background: rgba(255, 107, 44, 0.09);
}

.page-about .about-path__item--now .about-path__era {
  color: var(--acid);
  border-color: rgba(182, 255, 61, 0.3);
  background: rgba(182, 255, 61, 0.09);
}

.page-about .about-path__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(17px, 2.2vw, 21px);
  line-height: 1.4;
  color: var(--text);
}

.page-about .about-path__desc {
  margin: 8px 0 0;
  max-width: 56ch;
  font-size: 14px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 05 合作生态 ---------- */
.page-about .about-eco__grid {
  margin-top: clamp(22px, 3.5vw, 38px);
  row-gap: 16px;
}

.page-about .about-eco__card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(20px, 3vw, 28px);
  min-width: 0;
}

.page-about .about-eco__tag {
  align-self: flex-start;
  margin: 0;
  padding: 4px 10px;
  border-radius: var(--r-pill);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--electric);
  border: 1px solid rgba(44, 125, 255, 0.3);
  background: rgba(44, 125, 255, 0.1);
}

.page-about .about-eco__tag--violet {
  color: var(--violet);
  border-color: rgba(138, 92, 255, 0.35);
  background: rgba(138, 92, 255, 0.1);
}

.page-about .about-eco__card p {
  margin: 0;
  max-width: 48ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-eco__card .btn {
  align-self: flex-start;
  margin-top: auto;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-tiers__scale span:nth-child(2) {
    display: inline;
  }

  .page-about .about-tiers__label {
    font-size: 12px;
  }

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

  .page-about .about-net {
    grid-template-columns: repeat(auto-fill, minmax(72px, 1fr));
  }
}

@media (min-width: 720px) {
  .page-about .about-axis__label {
    display: block;
  }
}

@media (min-width: 860px) {
  .page-about .about-hero__shell {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(30px, 5vw, 60px);
    align-items: center;
  }

  .page-about .about-hero__stat {
    padding: 18px 16px;
  }

  .page-about .about-hero__stat dd {
    font-size: 20px;
  }

  .page-about .about-inside__body {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  }
}

@media (min-width: 900px) {
  .page-about .about-making__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-about .about-timeline::before {
    left: 50%;
    transform: translateX(-1px);
  }

  .page-about .about-path__item {
    width: 50%;
    padding: 0 42px clamp(26px, 3vw, 40px) 0;
  }

  .page-about .about-path__item:nth-child(even) {
    margin-left: 50%;
    padding: 0 0 clamp(26px, 3vw, 40px) 42px;
  }

  .page-about .about-path__item:nth-child(odd) .about-path__dot {
    left: auto;
    right: -8px;
  }

  .page-about .about-path__item:nth-child(even) .about-path__dot {
    left: -8px;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-axis__node,
  .page-about .about-team__tip {
    transition: none;
  }
}