/* =========================================================
   品牌故事 /story/ —— 页面专属样式（作用域 .page-about）
   ========================================================= */

.page-about {
  --a-line: rgba(53, 224, 192, .52);
  --a-hair: rgba(29, 26, 22, .14);
  --a-hair-inv: rgba(53, 224, 192, .2);
  --a-glow: rgba(53, 224, 192, .16);
  --a-hot: rgba(255, 122, 61, .72);
  --a-now: #143326;

  display: block;
  background: var(--ink-900);
  color: var(--ivory);
  overflow-x: hidden;
}

/* 通用排版 ------------------------------------------------ */
.page-about h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.65rem, 4.2vw, 2.8rem);
  line-height: 1.05;
  letter-spacing: -.025em;
  margin: .85rem 0 0;
  max-width: 22ch;
}

.page-about h3 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -.01em;
}

.page-about .zone--cream {
  background: var(--cream);
  color: var(--brown);
}

.page-about .zone--panel {
  background: var(--ink-800);
  color: var(--ivory);
}

.page-about .zone--cream .media__cap {
  color: rgba(29, 26, 22, .6);
}

/* 首屏 ---------------------------------------------------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding-block: clamp(1.5rem, 5vw, 2.8rem) clamp(2.6rem, 7vw, 5rem);
  border-bottom: 1px solid var(--edge);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: -22%;
  right: -18%;
  width: min(82vw, 780px);
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle at 40% 40%, var(--a-glow), transparent 62%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  z-index: -1;
  left: -2%;
  bottom: 13%;
  width: 56%;
  height: 2px;
  background: linear-gradient(90deg, var(--a-line), transparent);
  transform: rotate(-1.6deg);
  transform-origin: left center;
  pointer-events: none;
}

.page-about .about-crumbs {
  margin-bottom: clamp(1.2rem, 3.5vw, 2rem);
}

.page-about .about-hero__tag {
  margin-bottom: .9rem;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.05rem, 6.6vw, 4.8rem);
  line-height: .98;
  letter-spacing: -.03em;
  margin: 0;
  max-width: 17ch;
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.6rem);
  margin-top: clamp(1.6rem, 4vw, 2.6rem);
}

.page-about .about-hero__lede p {
  margin: 0 0 1.05rem;
  font-size: 1.0625rem;
  line-height: 1.78;
  max-width: 60ch;
  color: rgba(251, 247, 236, .8);
}

.page-about .about-hero__lede p:last-of-type {
  margin-bottom: 0;
}

/* 指标条 */
.page-about .about-stats {
  display: flex;
  flex-wrap: wrap;
  gap: .85rem 1.5rem;
  margin: clamp(1.6rem, 3.5vw, 2.2rem) 0 0;
  padding: 1.2rem 0 0;
  list-style: none;
  border-top: 1px dashed var(--edge-soft);
}

.page-about .about-stats li {
  display: flex;
  flex-direction: column;
  gap: .2rem;
  font-size: .74rem;
  letter-spacing: .1em;
  line-height: 1.4;
  color: var(--mist);
}

.page-about .about-stats b {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--cy);
  font-variant-numeric: tabular-nums;
}

/* 首屏图 */
.page-about .about-hero__media {
  margin: 0;
  background: linear-gradient(135deg, var(--ink-800), var(--ink-700));
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 1.7rem 100%, 0 calc(100% - 1.7rem));
}

.page-about .media__cap {
  display: block;
  margin-top: .7rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .08em;
  line-height: 1.6;
  color: var(--mist);
}

/* 时间轴区 ------------------------------------------------ */
.page-about .about-line {
  position: relative;
  padding-block: clamp(2.8rem, 7vw, 5rem);
}

.page-about .about-line__lede {
  margin: 1.1rem 0 0;
  max-width: 58ch;
  font-size: 1.0625rem;
  line-height: 1.78;
  color: rgba(29, 26, 22, .78);
}

.page-about .tl {
  position: relative;
  list-style: none;
  margin: clamp(1.8rem, 4vw, 2.6rem) 0 0;
  padding: 0 0 0 .8rem;
}

.page-about .tl__item {
  position: relative;
  padding: 0 0 1.9rem 2.2rem;
}

.page-about .tl__item::before,
.page-about .tl__item::after {
  content: "";
  position: absolute;
}

.page-about .tl__item::after {
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--a-hair);
  transform: translateX(-50%);
}

.page-about .tl__item::before {
  left: 0;
  top: .5rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--cy);
  box-shadow: 0 0 0 3px rgba(53, 224, 192, .22);
  transform: translateX(-50%);
  z-index: 1;
}

.page-about .tl__item--now::before {
  background: var(--orange);
  box-shadow: 0 0 0 3px rgba(255, 122, 61, .22);
}

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

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

.page-about .tl__year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: .06em;
  font-variant-numeric: tabular-nums;
  color: var(--brown);
  border-bottom: 2px solid var(--a-hot);
  padding-bottom: .1rem;
  margin-bottom: .55rem;
}

.page-about .tl__name {
  font-size: clamp(1.1rem, 2.3vw, 1.35rem);
  margin: 0 0 .45rem;
}

.page-about .tl__text {
  margin: 0;
  font-size: 1rem;
  line-height: 1.78;
  max-width: 58ch;
  color: rgba(29, 26, 22, .76);
}

.page-about .tl__more {
  margin: .6rem 0 0;
  padding-left: .85rem;
  border-left: 2px solid var(--a-line);
  font-size: .85rem;
  line-height: 1.7;
  max-width: 54ch;
  color: rgba(29, 26, 22, .58);
}

/* 工作流区 ------------------------------------------------ */
.page-about .about-flow {
  position: relative;
  padding-block: clamp(2.8rem, 7vw, 5rem);
  background-image: repeating-linear-gradient(
    115deg,
    rgba(143, 168, 160, .035) 0 1px,
    transparent 1px 15px
  );
}

.page-about .about-flow__lede {
  margin: 1.1rem 0 0;
  max-width: 58ch;
  font-size: 1.0625rem;
  line-height: 1.78;
  color: rgba(251, 247, 236, .78);
}

.page-about .flow {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: clamp(1.7rem, 4vw, 2.4rem) 0 0;
  padding: 0;
  background: var(--a-hair-inv);
  border: 1px solid var(--a-hair-inv);
}

.page-about .flow__step {
  position: relative;
  padding: clamp(1.05rem, 2.6vw, 1.5rem);
  background: var(--ink-800);
  outline: 2px solid transparent;
  outline-offset: -2px;
  transition: background var(--dur-1) var(--ease),
              outline-color var(--dur-1) var(--ease);
}

.page-about .flow__step:hover,
.page-about .flow__step:focus-visible {
  background: var(--ink-700);
  outline-color: var(--cy);
}

.page-about .flow__no {
  display: block;
  font-family: var(--font-mono);
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .14em;
  font-variant-numeric: tabular-nums;
  color: var(--cy);
  margin-bottom: .7rem;
}

.page-about .flow__name {
  font-size: 1.1rem;
  margin: 0 0 .45rem;
  color: var(--ivory);
}

.page-about .flow__text {
  margin: 0;
  font-size: .9rem;
  line-height: 1.72;
  color: var(--mist);
}

/* 团队区 -------------------------------------------------- */
.page-about .about-team {
  padding-block: clamp(2.8rem, 7vw, 5rem);
}

.page-about .about-team__grid {
  display: grid;
  gap: clamp(1.8rem, 4vw, 3rem);
}

.page-about .about-team__lede {
  margin: 1.1rem 0 0;
  max-width: 58ch;
  font-size: 1.0625rem;
  line-height: 1.78;
  color: rgba(29, 26, 22, .78);
}

.page-about .crew {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(1.5rem, 3.5vw, 2rem) 0 0;
  padding: 0;
  background: var(--a-hair);
  border: 1px solid var(--a-hair);
}

.page-about .crew__item {
  background: var(--ivory);
  padding: clamp(.9rem, 2.2vw, 1.2rem);
}

.page-about .crew__name {
  font-size: 1rem;
  margin: 0 0 .35rem;
}

.page-about .crew__text {
  margin: 0;
  font-size: .875rem;
  line-height: 1.7;
  color: rgba(29, 26, 22, .72);
}

.page-about .about-team__media {
  margin: 0;
  background: linear-gradient(135deg, #e6dfcd, #d7cdb6);
}

.page-about .about-team__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: polygon(1.7rem 0, 100% 0, 100% calc(100% - 1.7rem), calc(100% - 1.7rem) 100%, 0 100%, 0 1.7rem);
}

/* 改版区 -------------------------------------------------- */
.page-about .about-revision {
  padding-block: clamp(2.8rem, 7vw, 5rem);
}

.page-about .about-revision__lede {
  margin: 1.1rem 0 0;
  max-width: 58ch;
  font-size: 1.0625rem;
  line-height: 1.78;
  color: rgba(251, 247, 236, .78);
}

.page-about .rev {
  display: grid;
  gap: 1px;
  margin: clamp(1.7rem, 4vw, 2.4rem) 0 0;
  background: var(--a-hair-inv);
  border: 1px solid var(--a-hair-inv);
}

.page-about .rev__item {
  padding: clamp(1.1rem, 2.8vw, 1.7rem);
  background: var(--ink-800);
}

.page-about .rev__item--now {
  background: var(--a-now);
}

.page-about .rev__year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: .82rem;
  font-weight: 600;
  letter-spacing: .14em;
  font-variant-numeric: tabular-nums;
  color: var(--cy);
  border: 1px solid rgba(53, 224, 192, .35);
  padding: .18rem .55rem;
  margin: 0 0 .9rem;
}

.page-about .rev__item--now .rev__year {
  color: var(--orange);
  border-color: rgba(255, 122, 61, .45);
}

.page-about .rev__name {
  font-size: 1.2rem;
  margin: 0 0 .55rem;
  color: var(--ivory);
}

.page-about .rev__text {
  margin: 0;
  font-size: .95rem;
  line-height: 1.78;
  color: rgba(251, 247, 236, .78);
}

.page-about .about-revision__media {
  margin: clamp(1.7rem, 4vw, 2.4rem) 0 0;
  background: linear-gradient(120deg, var(--ink-800), var(--ink-700));
}

.page-about .about-revision__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 2rem), calc(100% - 2rem) 100%, 0 100%);
}

/* 社群合作区 ---------------------------------------------- */
.page-about .about-community {
  padding-block: clamp(2.8rem, 7vw, 5rem);
}

.page-about .about-community__lede {
  margin: 1.1rem 0 0;
  max-width: 60ch;
  font-size: 1.0625rem;
  line-height: 1.78;
  color: rgba(29, 26, 22, .78);
}

.page-about .coop {
  list-style: none;
  display: grid;
  gap: clamp(1.1rem, 2.8vw, 1.7rem);
  margin: clamp(1.7rem, 4vw, 2.4rem) 0 0;
  padding: 0;
}

.page-about .coop__item {
  position: relative;
  padding-top: 1.6rem;
  border-top: 2px solid var(--brown);
}

.page-about .coop__item::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 0;
  width: 2.6rem;
  height: 2px;
  background: var(--orange);
}

.page-about .coop__name {
  font-size: 1.1rem;
  margin: 0 0 .5rem;
}

.page-about .coop__text {
  margin: 0;
  font-size: .95rem;
  line-height: 1.75;
  color: rgba(29, 26, 22, .74);
}

.page-about .about-community__note {
  margin: clamp(1.6rem, 4vw, 2.2rem) 0 0;
  max-width: 58ch;
  font-size: 1rem;
  line-height: 1.78;
  color: rgba(29, 26, 22, .78);
}

.page-about .about-community__note a {
  color: var(--brown);
  text-decoration: underline;
  text-decoration-color: var(--orange);
  text-underline-offset: .25em;
}

.page-about .about-community__note a:hover {
  text-decoration-color: var(--brown);
}

/* 收束区 -------------------------------------------------- */
.page-about .about-outro {
  position: relative;
  padding-block: clamp(2.8rem, 7vw, 5rem) clamp(3.2rem, 8vw, 6rem);
}

.page-about .about-outro::before {
  content: "";
  position: absolute;
  z-index: 0;
  left: -12%;
  top: 10%;
  width: min(70vw, 640px);
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle at 30% 30%, rgba(53, 224, 192, .1), transparent 64%);
  pointer-events: none;
}

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

.page-about .about-outro__lede {
  margin: 1.1rem 0 0;
  max-width: 56ch;
  font-size: 1.0625rem;
  line-height: 1.78;
  color: rgba(251, 247, 236, .78);
}

.page-about .about-outro__links {
  display: flex;
  flex-wrap: wrap;
  gap: .8rem;
  margin-top: clamp(1.6rem, 4vw, 2.2rem);
}

/* 交互：桌面指针设备上时间轴补充说明随悬停展开 ------------- */
@media (hover: hover) and (pointer: fine) {
  .page-about .tl__more {
    max-height: 0;
    margin-top: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height var(--dur-3) var(--ease),
                margin-top var(--dur-2) var(--ease),
                opacity var(--dur-2) var(--ease);
  }

  .page-about .tl__item:hover .tl__more,
  .page-about .tl__item:focus-within .tl__more {
    max-height: 12rem;
    margin-top: .6rem;
    opacity: 1;
  }
}

/* 响应式 -------------------------------------------------- */
@media (min-width: 640px) {
  .page-about .flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .page-about .coop {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 820px) {
  .page-about .rev {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .tl {
    padding-left: 0;
  }

  .page-about .tl__item {
    display: grid;
    grid-template-columns: 7rem minmax(0, 1fr);
    column-gap: 2.4rem;
    padding: 0 0 2.4rem 0;
  }

  .page-about .tl__item::after {
    left: calc(7rem + 1.2rem);
    top: 0;
    bottom: 0;
    width: 2px;
    transform: translateX(-50%);
  }

  .page-about .tl__item::before {
    left: calc(7rem + 1.2rem);
    top: .45rem;
    transform: translateX(-50%);
  }

  .page-about .tl__year {
    grid-column: 1;
    grid-row: 1 / -1;
    align-self: start;
    display: block;
    width: 100%;
    text-align: right;
    margin-bottom: 0;
  }

  .page-about .tl__name,
  .page-about .tl__text,
  .page-about .tl__more {
    grid-column: 2;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    column-gap: clamp(2rem, 5vw, 4rem);
    align-items: start;
  }
}

@media (min-width: 940px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-about .flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .flow__step,
  .page-about .tl__more {
    transition: none;
  }
}
<<<END>>>