/* =========================================
   品牌历程 / /history/
   ========================================= */
.page-about {
  --about-pad: 52px;
  --about-gap: 20px;
}

.page-about .crumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 18px;
  font-size: 13px;
  letter-spacing: .01em;
  color: var(--steel);
}

.page-about .crumbs a {
  color: var(--cyan);
  text-decoration: none;
}

.page-about .crumbs a:hover {
  text-decoration: underline;
}

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

/* ---------- 首屏 ---------- */
.page-about .hero {
  padding: 22px 0 6px;
}

.page-about .hero__inner {
  display: grid;
  gap: 26px;
}

.page-about .hero__title {
  margin: 12px 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.4rem, 10vw, 4.4rem);
  line-height: .98;
  letter-spacing: -.02em;
  color: var(--cream);
  text-wrap: balance;
}

.page-about .hero__lede {
  max-width: 62ch;
  color: rgba(246, 243, 236, .82);
}

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

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

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

/* ---------- 版本时间轴 ---------- */
.page-about .timeline {
  padding: var(--about-pad) 0;
}

.page-about .vline {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
}

.page-about .vline__item {
  position: relative;
  padding-left: 34px;
  margin-bottom: 30px;
}

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

.page-about .vline__item::after {
  content: "";
  position: absolute;
  left: 7px;
  top: 30px;
  bottom: -30px;
  width: 2px;
  background: linear-gradient(180deg, rgba(43, 224, 200, .5), rgba(43, 224, 200, .07));
}

.page-about .vline__item:last-child::after {
  display: none;
}

.page-about .vline__dot {
  position: absolute;
  left: 0;
  top: 10px;
  width: 16px;
  height: 16px;
  border-radius: var(--r-pill);
  background: var(--sea);
  border: 3px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(43, 224, 200, .12);
}

.page-about .vline__num {
  position: absolute;
  right: 10px;
  top: -16px;
  z-index: 2;
  font-size: clamp(42px, 11vw, 68px);
  font-weight: 800;
  line-height: 1;
  color: rgba(43, 224, 200, .13);
  pointer-events: none;
  user-select: none;
}

.page-about .vline__panel {
  position: relative;
  z-index: 1;
  transition: transform 140ms ease, box-shadow 140ms ease, border-color 140ms ease;
}

.page-about .vline__panel:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-2);
  border-color: rgba(43, 224, 200, .38);
}

.page-about .vline__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
}

.page-about .vline__facts li {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 5px 12px;
  border-radius: var(--r-pill);
  background: rgba(43, 224, 200, .09);
  border: 1px solid var(--line);
  font-size: 13px;
  color: rgba(246, 243, 236, .86);
}

.page-about .vline__facts b {
  font-size: 16px;
  color: var(--cyan);
}

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

/* ---------- 团队 ---------- */
.page-about .team {
  padding: var(--about-pad) 0;
}

.page-about .team__grid {
  display: grid;
  gap: 30px;
  margin-top: 30px;
}

.page-about .team__bars {
  display: grid;
  gap: 22px;
  align-content: start;
}

.page-about .team-bar__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 9px;
}

.page-about .team-bar__name {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
}

.page-about .team-bar__val {
  font-size: 22px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .team-bar__track {
  height: 14px;
  border-radius: var(--r-pill);
  background: rgba(20, 28, 40, .1);
  overflow: hidden;
}

.page-about .team-bar__fill {
  display: block;
  height: 100%;
  border-radius: var(--r-pill);
  background: linear-gradient(90deg, var(--cyan), var(--cyan-soft));
}

.page-about .team-bar--content .team-bar__fill {
  width: 40%;
}

.page-about .team-bar--support .team-bar__fill {
  width: 100%;
  background: linear-gradient(90deg, #1FBFAC, var(--cyan-soft));
}

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

.page-about .team__stat {
  display: grid;
  gap: 6px;
}

.page-about .team__stat .stat__num {
  font-size: 30px;
  font-weight: 800;
  color: var(--ink);
}

.page-about .team__stat .stat__label {
  font-size: 13px;
  line-height: 1.55;
  color: rgba(20, 28, 40, .68);
}

.page-about .team__note {
  margin: 0;
  padding-left: 14px;
  border-left: 3px solid var(--cyan);
  font-size: 14px;
  line-height: 1.75;
  color: rgba(20, 28, 40, .74);
  max-width: 60ch;
}

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

/* ---------- 数据来源 ---------- */
.page-about .sources {
  padding: var(--about-pad) 0;
}

.page-about .sources__grid {
  display: grid;
  gap: 16px;
  margin-top: 30px;
}

.page-about .sources__card {
  display: grid;
  gap: 4px;
  align-content: start;
}

.page-about .sources__card .data-list {
  margin: 8px 0 0;
}

.page-about .sources__card .data-list li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 14px;
}

.page-about .sources__card .data-list li:last-child {
  border-bottom: 0;
}

.page-about .sources__card .data-list__key {
  color: var(--steel);
}

.page-about .sources__card .data-list__val {
  color: var(--cream);
  text-align: right;
}

/* ---------- 赛季节奏 ---------- */
.page-about .rhythm {
  padding: var(--about-pad) 0;
}

.page-about .rhythm__grid {
  display: grid;
  gap: 16px;
  margin-top: 30px;
}

.page-about .rhythm__item {
  padding: 20px 20px 18px;
  border-radius: var(--r-md);
  background: rgba(255, 255, 255, .72);
  border: 1px solid var(--line-cream);
  transition: transform 140ms ease, box-shadow 140ms ease;
}

.page-about .rhythm__item:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 32px rgba(20, 28, 40, .1);
}

.page-about .rhythm__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: #1A9C8B;
}

.page-about .rhythm__title {
  margin: 8px 0 10px;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-about .rhythm__body {
  margin: 0 0 18px;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(20, 28, 40, .74);
}

.page-about .rhythm__bar {
  height: 8px;
  border-radius: var(--r-pill);
  background: rgba(20, 28, 40, .1);
  overflow: hidden;
}

.page-about .rhythm__fill {
  display: block;
  height: 100%;
  border-radius: var(--r-pill);
  background: linear-gradient(90deg, var(--cyan), var(--cyan-soft));
}

.page-about .rhythm__item--pre .rhythm__fill { width: 68%; }
.page-about .rhythm__item--live .rhythm__fill { width: 100%; }
.page-about .rhythm__item--post .rhythm__fill { width: 84%; }
.page-about .rhythm__item--off .rhythm__fill { width: 44%; }

.page-about .rhythm__media {
  margin: 32px 0 0;
}

/* ---------- 使用情况 ---------- */
.page-about .retention {
  padding: var(--about-pad) 0;
}

.page-about .retention__grid {
  display: grid;
  gap: 14px;
  margin-top: 30px;
}

.page-about .retention__stat {
  display: grid;
  gap: 8px;
  align-content: start;
}

.page-about .retention__stat .stat__num {
  font-size: clamp(30px, 8vw, 40px);
  font-weight: 800;
  line-height: 1;
  color: var(--cyan);
}

.page-about .retention__stat .stat__label {
  font-size: 13px;
  line-height: 1.7;
  color: rgba(246, 243, 236, .7);
}

/* ---------- 长期承诺 ---------- */
.page-about .promise {
  padding: var(--about-pad) 0 64px;
}

.page-about .promise__list {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .promise__item {
  padding: 22px 0 22px 26px;
  border-bottom: 1px solid var(--line-cream);
  position: relative;
}

.page-about .promise__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 30px;
  width: 10px;
  height: 10px;
  border-radius: var(--r-pill);
  background: var(--cyan);
}

.page-about .promise__item:first-child {
  border-top: 1px solid var(--line-cream);
}

.page-about .promise__title {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-about .promise__item p {
  margin: 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(20, 28, 40, .74);
}

.page-about .promise__item a {
  color: #0E8C7C;
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid rgba(14, 140, 124, .35);
}

.page-about .promise__item a:hover {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

.page-about .promise__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

/* ---------- 焦点可见性 ---------- */
.page-about a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  border-radius: var(--r-sm);
}

/* ---------- 平板及桌面 ---------- */
@media (min-width: 720px) {
  .page-about .sources__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (min-width: 960px) {
  .page-about {
    --about-pad: 84px;
  }

  .page-about .hero {
    padding: 30px 0 10px;
  }

  .page-about .hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
    gap: 40px;
  }

  .page-about .hero__media {
    margin-top: 34px;
  }

  .page-about .vline__item {
    padding-left: 48px;
    max-width: 860px;
  }

  .page-about .vline__item:nth-child(2) { margin-left: 24px; }
  .page-about .vline__item:nth-child(3) { margin-left: 48px; }
  .page-about .vline__item:nth-child(4) { margin-left: 72px; }

  .page-about .team__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 40px;
    align-items: start;
  }

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

  .page-about .sources__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .rhythm__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .rhythm__item {
    padding: 22px 20px;
  }

  .page-about .rhythm__media {
    margin-top: 40px;
  }

  .page-about .retention__grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .retention__stat {
    grid-column: span 2;
  }

  .page-about .retention__stat:nth-child(4) {
    grid-column: 2 / span 2;
  }

  .page-about .retention__stat:nth-child(5) {
    grid-column: 4 / span 2;
  }
}

@media (min-width: 1240px) {
  .page-about .hero__title {
    font-size: 4.6rem;
  }

  .page-about .vline__num {
    font-size: 76px;
    right: 18px;
    top: -20px;
  }
}

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

  .page-about .vline__panel:hover,
  .page-about .rhythm__item:hover {
    transform: none;
  }
}
<<<END>>>