/* ===== 品牌故事页 / page-about ===== */

.page-about {
  display: block;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--f-body);
  font-size: var(--t16);
  line-height: 1.85;
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding: 22px 0 8px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 16px 0 52px;
}

.page-about .about-hero__inner {
  display: grid;
  gap: 30px;
}

@media (min-width: 960px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
    gap: 56px;
    align-items: start;
  }
}

.page-about .about-kicker {
  display: inline-block;
  margin: 0 0 20px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--cool-100);
  font-family: var(--f-mono);
  font-size: var(--t12);
  letter-spacing: 0.08em;
  color: var(--orange-ink);
}

.page-about .about-hero__title {
  margin: 0 0 20px;
  font-family: var(--f-display);
  font-weight: 900;
  font-size: var(--t34);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--ink);
}

@media (min-width: 760px) {
  .page-about .about-hero__title {
    font-size: var(--t48);
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero__title {
    font-size: var(--t72);
    line-height: 1.04;
  }
}

.page-about .about-hero__intro {
  margin: 0;
  max-width: 40em;
  font-size: var(--t16);
  color: var(--cool-600);
}

@media (min-width: 760px) {
  .page-about .about-hero__intro {
    font-size: var(--t20);
    line-height: 1.75;
  }
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 34px;
  margin: 30px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--cool-100);
  list-style: none;
}

.page-about .about-hero__meta-k {
  display: block;
  font-family: var(--f-mono);
  font-size: var(--t12);
  letter-spacing: 0.08em;
  color: var(--cool-600);
}

.page-about .about-hero__meta-v {
  display: block;
  margin-top: 2px;
  font-family: var(--f-display);
  font-weight: 900;
  font-size: var(--t20);
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

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

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--edge);
  background: var(--panel);
}

.page-about .about-hero__figure figcaption {
  margin-top: 10px;
  font-family: var(--f-mono);
  font-size: var(--t12);
  letter-spacing: 0.08em;
  line-height: 1.6;
  color: var(--cool-600);
}

/* ---------- 章节通用结构 ---------- */
.page-about .about-chapter {
  padding: 48px 0;
  border-top: 1px solid var(--cool-100);
}

@media (min-width: 900px) {
  .page-about .about-chapter {
    padding: 88px 0;
  }
}

.page-about .about-chapter__inner {
  display: grid;
  gap: 18px;
}

@media (min-width: 900px) {
  .page-about .about-chapter__inner {
    grid-template-columns: 128px minmax(0, 1fr);
    gap: 56px;
  }
}

.page-about .about-chapter__no {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-family: var(--f-mono);
}

@media (min-width: 900px) {
  .page-about .about-chapter__no {
    position: sticky;
    top: 96px;
    align-self: start;
    flex-direction: column;
    gap: 6px;
  }
}

.page-about .about-chapter__idx {
  font-size: var(--t14);
  letter-spacing: 0.08em;
  color: var(--orange-ink);
}

.page-about .about-chapter__year {
  font-size: var(--t14);
  letter-spacing: 0.08em;
  color: var(--cool-600);
}

.page-about .about-chapter__body {
  max-width: 64ch;
  min-width: 0;
}

.page-about .about-chapter__body h2 {
  margin: 0 0 18px;
  font-family: var(--f-display);
  font-weight: 900;
  font-size: var(--t26);
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--ink);
}

@media (min-width: 900px) {
  .page-about .about-chapter__body h2 {
    font-size: var(--t34);
  }
}

.page-about .about-chapter__lede {
  margin: 0 0 22px;
  font-size: var(--t20);
  line-height: 1.7;
  color: var(--ink);
}

.page-about .about-chapter__body p {
  margin: 0 0 20px;
  color: var(--cool-600);
}

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

.page-about .about-chapter__body a {
  color: var(--orange-ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-chapter__body a:hover {
  color: var(--orange);
}

.page-about .about-quote {
  margin: 30px 0 0;
  padding: 4px 0 4px 22px;
  border-left: 2px solid var(--orange);
  font-size: var(--t20);
  line-height: 1.7;
  color: var(--ink);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 34px 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--cool-100);
  background: var(--panel);
}

.page-about .about-figure figcaption {
  margin-top: 10px;
  font-family: var(--f-mono);
  font-size: var(--t12);
  letter-spacing: 0.08em;
  line-height: 1.6;
  color: var(--cool-600);
}

@media (min-width: 760px) {
  .page-about .about-figure--wide {
    margin-top: 40px;
  }
}

/* ---------- 维度刻度对比 ---------- */
.page-about .scale-compare {
  display: grid;
  gap: 22px;
  margin: 34px 0 0;
  padding: 24px;
  border: 1px solid var(--cool-100);
  background: var(--white);
}

@media (min-width: 720px) {
  .page-about .scale-compare {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
    padding: 28px 30px;
  }
}

.page-about .scale-compare__item {
  min-width: 0;
}

.page-about .scale-compare__k {
  display: block;
  font-family: var(--f-mono);
  font-size: var(--t12);
  letter-spacing: 0.08em;
  color: var(--cool-600);
}

.page-about .scale-compare__v {
  display: block;
  margin: 4px 0 14px;
  font-family: var(--f-display);
  font-weight: 900;
  font-size: var(--t26);
  line-height: 1.2;
  color: var(--orange-ink);
  font-variant-numeric: tabular-nums;
}

.page-about .scale-compare__bar {
  position: relative;
  display: block;
  height: 8px;
  background: var(--cool-100);
  overflow: hidden;
}

.page-about .scale-compare__bar::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
}

.page-about .scale-compare__bar--before::after {
  width: 24%;
  background: var(--cool-600);
}

.page-about .scale-compare__bar--after::after {
  width: 100%;
  background: var(--orange);
}

.page-about .scale-compare__note {
  display: block;
  margin-top: 10px;
  font-size: var(--t14);
  line-height: 1.7;
  color: var(--cool-600);
}

/* ---------- 团队分工条形图 ---------- */
.page-about .team-chart {
  display: grid;
  gap: 18px;
  margin: 30px 0 32px;
  padding: 24px;
  border: 1px solid var(--cool-100);
  background: var(--white);
}

.page-about .team-chart__row {
  display: grid;
  gap: 8px;
  min-width: 0;
}

.page-about .team-chart__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.page-about .team-chart__label {
  font-size: var(--t14);
  color: var(--ink);
}

.page-about .team-chart__val {
  font-family: var(--f-mono);
  font-size: var(--t14);
  letter-spacing: 0.08em;
  color: var(--orange-ink);
  font-variant-numeric: tabular-nums;
}

.page-about .team-chart__track {
  display: block;
  height: 10px;
  background: var(--cool-100);
  overflow: hidden;
}

.page-about .team-chart__fill {
  display: block;
  height: 100%;
  transform-origin: left center;
  animation: about-bar-grow 0.9s var(--ease) both;
}

.page-about .team-chart__row--eng .team-chart__fill {
  width: 45.2%;
  background: var(--orange);
  animation-delay: 0.05s;
}

.page-about .team-chart__row--cs .team-chart__fill {
  width: 14.5%;
  background: var(--orange-ink);
  animation-delay: 0.18s;
}

.page-about .team-chart__row--ops .team-chart__fill {
  width: 40.3%;
  background: var(--edge);
  animation-delay: 0.31s;
}

@keyframes about-bar-grow {
  from {
    transform: scaleX(0);
  }
  to {
    transform: scaleX(1);
  }
}

@supports (animation-timeline: view()) {
  .page-about .team-chart__fill {
    animation-timeline: view();
    animation-range: entry 15% cover 42%;
    animation-delay: 0s;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-chart__fill {
    animation: none;
  }
}

/* ---------- 纵向时间轴 ---------- */
.page-about .timeline {
  position: relative;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  top: 10px;
  bottom: 10px;
  left: 7px;
  width: 1px;
  background: var(--cool-100);
}

.page-about .timeline__item {
  position: relative;
  padding: 0 0 30px 32px;
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  top: 9px;
  left: 0;
  width: 15px;
  height: 15px;
  border: 2px solid var(--orange);
  border-radius: 50%;
  background: var(--paper);
  box-sizing: border-box;
  transition: background-color 0.25s var(--ease);
}

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

.page-about .timeline__item:hover::before {
  background: var(--lime);
}

.page-about .timeline__node {
  border: 0;
}

.page-about .timeline__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 16px;
  margin: 0;
  padding: 0;
  cursor: pointer;
  list-style: none;
}

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

.page-about .timeline__head::after {
  content: "+";
  margin-left: auto;
  font-family: var(--f-mono);
  font-size: var(--t14);
  line-height: 1;
  color: var(--cool-600);
}

.page-about .timeline__node[open] > .timeline__head::after {
  content: "−";
  color: var(--orange-ink);
}

.page-about .timeline__year {
  font-family: var(--f-mono);
  font-size: var(--t14);
  letter-spacing: 0.08em;
  color: var(--orange-ink);
  font-variant-numeric: tabular-nums;
}

.page-about .timeline__title {
  font-family: var(--f-display);
  font-weight: 900;
  font-size: var(--t20);
  line-height: 1.35;
  color: var(--ink);
  transition: color 0.2s var(--ease);
}

.page-about .timeline__head:hover .timeline__title {
  color: var(--orange-ink);
}

.page-about .timeline__body {
  padding-top: 10px;
}

.page-about .timeline__body p {
  margin: 0 0 12px;
  max-width: 58ch;
  font-size: var(--t16);
  line-height: 1.85;
  color: var(--cool-600);
}

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

.page-about .timeline__body a {
  color: var(--orange-ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .timeline__body a:hover {
  color: var(--orange);
}

.page-about .timeline__item--media {
  padding-bottom: 34px;
}

.page-about .timeline__item--media::before {
  display: none;
}

.page-about .timeline__item--media .about-figure {
  margin-top: 0;
}

@media (min-width: 720px) {
  .page-about .timeline::before {
    left: 87px;
  }

  .page-about .timeline__item {
    padding-left: 116px;
  }

  .page-about .timeline__item::before {
    left: 80px;
  }

  .page-about .timeline__year {
    position: absolute;
    top: 8px;
    left: 0;
    width: 66px;
    text-align: right;
  }

  .page-about .timeline__head {
    flex-wrap: nowrap;
  }

  .page-about .timeline__item--media {
    padding-left: 116px;
  }

  .page-about .timeline__item--media .about-figure--tall {
    max-width: 360px;
  }
}

/* ---------- 合作生态不规则网格 ---------- */
.page-about .eco-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: 32px;
}

@media (min-width: 760px) {
  .page-about .eco-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .eco-card--a,
  .page-about .eco-card--b {
    grid-column: span 3;
  }

  .page-about .eco-card--c,
  .page-about .eco-card--d,
  .page-about .eco-card--e {
    grid-column: span 2;
  }
}

.page-about .eco-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px;
  border: 1px solid var(--cool-100);
  background: var(--white);
  transition: border-color 0.25s var(--ease);
}

.page-about .eco-card:hover {
  border-color: var(--orange);
}

.page-about .eco-card--b {
  background: var(--arena);
  border-color: var(--edge);
}

.page-about .eco-card--b .eco-card__title {
  color: var(--paper);
}

.page-about .eco-card--b .eco-card__text {
  color: var(--muted);
}

.page-about .eco-card--b .eco-card__no {
  color: var(--lime);
}

.page-about .eco-card__no {
  font-family: var(--f-mono);
  font-size: var(--t12);
  letter-spacing: 0.08em;
  color: var(--orange-ink);
}

.page-about .eco-card__title {
  margin: 0;
  font-family: var(--f-display);
  font-weight: 900;
  font-size: var(--t20);
  line-height: 1.3;
  color: var(--ink);
}

.page-about .eco-card__text {
  margin: 0;
  font-size: var(--t14);
  line-height: 1.8;
  color: var(--cool-600);
}

/* ---------- 长期坚持（深色分区） ---------- */
.page-about .about-band {
  padding: 52px 0;
  background: var(--arena);
  color: var(--paper);
}

@media (min-width: 900px) {
  .page-about .about-band {
    padding: 88px 0;
  }
}

.page-about .about-band__head {
  max-width: 48ch;
  margin-bottom: 38px;
}

.page-about .about-band__kicker {
  display: block;
  margin-bottom: 14px;
  font-family: var(--f-mono);
  font-size: var(--t12);
  letter-spacing: 0.08em;
  color: var(--orange);
}

.page-about .about-band h2 {
  margin: 0 0 14px;
  font-family: var(--f-display);
  font-weight: 900;
  font-size: var(--t26);
  line-height: 1.24;
  color: var(--paper);
}

@media (min-width: 900px) {
  .page-about .about-band h2 {
    font-size: var(--t34);
  }
}

.page-about .about-band__head p {
  margin: 0;
  font-size: var(--t16);
  color: var(--muted);
}

.page-about .pledge-grid {
  display: grid;
  gap: 1px;
  background: var(--edge);
  border: 1px solid var(--edge);
}

@media (min-width: 860px) {
  .page-about .pledge-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .pledge {
  position: relative;
  padding: 26px 22px 30px;
  background: var(--panel);
}

.page-about .pledge::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 2px;
  background: transparent;
  transition: background-color 0.3s var(--ease);
}

.page-about .pledge:hover::before {
  background: var(--orange);
}

.page-about .pledge__no {
  display: block;
  margin-bottom: 12px;
  font-family: var(--f-mono);
  font-size: var(--t12);
  letter-spacing: 0.08em;
  color: var(--lime);
}

.page-about .pledge h3 {
  margin: 0 0 12px;
  font-family: var(--f-display);
  font-weight: 900;
  font-size: var(--t20);
  line-height: 1.3;
  color: var(--paper);
}

.page-about .pledge p {
  margin: 0;
  font-size: var(--t14);
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 结尾引导 ---------- */
.page-about .about-cta {
  padding: 52px 0 68px;
  background: var(--paper);
  border-top: 1px solid var(--cool-100);
}

@media (min-width: 900px) {
  .page-about .about-cta {
    padding: 76px 0 96px;
  }
}

.page-about .about-cta__inner {
  display: grid;
  gap: 28px;
}

@media (min-width: 900px) {
  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 56px;
  }
}

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

.page-about .about-cta__text h2 {
  margin: 0 0 14px;
  font-family: var(--f-display);
  font-weight: 900;
  font-size: var(--t26);
  line-height: 1.24;
  color: var(--ink);
}

@media (min-width: 900px) {
  .page-about .about-cta__text h2 {
    font-size: var(--t34);
  }
}

.page-about .about-cta__text p {
  margin: 0;
  color: var(--cool-600);
}

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

@media (max-width: 480px) {
  .page-about .about-cta__actions .btn {
    flex: 1 1 100%;
    justify-content: center;
    text-align: center;
  }
}

/* ---------- 移动端细节 ---------- */
@media (max-width: 719px) {
  .page-about .timeline__head {
    align-items: flex-start;
  }

  .page-about .timeline__head::after {
    margin-left: 0;
  }

  .page-about .scale-compare,
  .page-about .team-chart {
    padding: 20px 16px;
  }
}

@media (max-width: 400px) {
  .page-about .about-hero__meta {
    gap: 14px 24px;
  }

  .page-about .about-hero__meta-v {
    font-size: var(--t16);
  }
}
<<<PAGE_CSS_END>>>