.page-about {
  --about-tl-line: 3px;
  --about-tl-gap: 18px;
  background: var(--hm-ink);
  color: var(--hm-paper);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--hm-header-h) + 26px) 0 52px;
  background:
    radial-gradient(110% 85% at 92% 0%, rgba(255, 90, 31, 0.22), transparent 60%),
    radial-gradient(80% 70% at 0% 100%, rgba(37, 230, 200, 0.10), transparent 65%),
    linear-gradient(162deg, var(--hm-ink-2), var(--hm-ink) 72%);
  border-bottom: 1px solid var(--hm-hair);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -18%;
  top: -42%;
  width: 44%;
  height: 200%;
  background: linear-gradient(180deg, rgba(255, 90, 31, 0.18), rgba(255, 90, 31, 0.02) 55%, rgba(37, 230, 200, 0.10));
  transform: skewX(-15deg);
  pointer-events: none;
}

.page-about .about-hero .hm-breadcrumb {
  position: relative;
  z-index: 1;
  margin-bottom: 26px;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 28px;
}

.page-about .about-hero__main h1 {
  margin: 10px 0 0;
  font-family: var(--hm-font-display);
  font-size: clamp(2rem, 7.2vw, 3.4rem);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--hm-paper);
}

.page-about .about-hero__main .hm-lede {
  margin-top: 18px;
  max-width: 42ch;
  color: var(--hm-mute);
  font-size: 1rem;
  line-height: 1.8;
}

.page-about .about-hero__facts {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 30px;
  margin: 26px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--hm-hair);
}

.page-about .about-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.page-about .about-hero__facts strong {
  font-family: var(--hm-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.6rem;
  color: var(--hm-orange);
  letter-spacing: -0.02em;
}

.page-about .about-hero__facts span {
  font-size: 0.82rem;
  color: var(--hm-mute);
  letter-spacing: 0.04em;
}

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

/* 首屏索引带 */
.page-about .about-index {
  padding: 20px 22px;
  border: 1px solid var(--hm-hair);
  border-radius: var(--hm-radius);
  align-self: start;
}

.page-about .about-index .hm-toc__title {
  margin: 0 0 14px;
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--hm-orange);
  text-transform: uppercase;
}

.page-about .about-index .hm-toc__list {
  display: grid;
  gap: 2px;
}

.page-about .about-index .hm-toc__link {
  display: block;
  padding: 9px 10px 9px 16px;
  position: relative;
  font-size: 0.9rem;
  color: var(--hm-paper);
  text-decoration: none;
  border-radius: 8px;
  transition: background 0.18s var(--hm-ease), color 0.18s var(--hm-ease);
}

.page-about .about-index .hm-toc__link::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 50%;
  width: 6px;
  height: 2px;
  background: var(--hm-steel-2);
  transform: translateY(-50%) skewX(-15deg);
  transition: background 0.18s var(--hm-ease), width 0.18s var(--hm-ease);
}

.page-about .about-index .hm-toc__link:hover {
  background: rgba(46, 57, 68, 0.5);
}

.page-about .about-index .hm-toc__link[aria-current="true"] {
  background: rgba(255, 90, 31, 0.14);
  color: var(--hm-orange-lite);
}

.page-about .about-index .hm-toc__link[aria-current="true"]::before {
  width: 12px;
  background: var(--hm-orange);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter__head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-bottom: 30px;
}

.page-about .hm-section-num {
  font-family: var(--hm-font-mono);
  font-size: 2.4rem;
  line-height: 1;
  letter-spacing: -0.04em;
  color: transparent;
  -webkit-text-stroke: 1px var(--hm-steel-2);
  display: block;
}

.page-about .about-chapter__head h2 {
  margin: 8px 0 0;
  font-family: var(--hm-font-display);
  font-size: clamp(1.4rem, 4.6vw, 2.1rem);
  line-height: 1.28;
  letter-spacing: -0.015em;
  color: var(--hm-paper);
}

.page-about .about-chapter__head .hm-lede {
  margin-top: 14px;
  max-width: 46ch;
  color: var(--hm-mute);
  font-size: 0.96rem;
  line-height: 1.8;
}

/* ---------- 时间线 ---------- */
.page-about .about-tl-media {
  margin: 0 0 34px;
}

.page-about .tl {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  display: grid;
  gap: var(--about-tl-gap);
}

.page-about .tl::before {
  content: "";
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: 5px;
  width: var(--about-tl-line);
  border-radius: 3px;
  background: linear-gradient(180deg, var(--hm-orange) 0%, var(--hm-orange) 52%, rgba(255, 90, 31, 0.18) 100%);
}

.page-about .tl__item {
  position: relative;
  padding: 20px 18px;
  background: var(--hm-ink-2);
  border: 1px solid var(--hm-hair);
  border-radius: var(--hm-radius);
  transition: border-color 0.18s var(--hm-ease), background 0.18s var(--hm-ease);
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 16px;
  width: 46px;
  height: 3px;
  background: var(--hm-orange);
  transform: skewX(-15deg) translateX(-14px);
}

.page-about .tl__item:hover,
.page-about .tl__item:focus-within {
  border-color: var(--hm-orange);
  background: var(--hm-steel-1);
}

.page-about .tl__item--now {
  border-color: rgba(37, 230, 200, 0.42);
  background: linear-gradient(160deg, rgba(37, 230, 200, 0.10), var(--hm-ink-2) 62%);
}

.page-about .tl__item--now::before {
  background: var(--hm-cyan);
}

.page-about .tl__season {
  display: inline-block;
  font-family: var(--hm-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.5rem;
  letter-spacing: -0.03em;
  color: var(--hm-orange);
}

.page-about .tl__item--now .tl__season {
  color: var(--hm-cyan);
}

.page-about .tl__title {
  margin: 6px 0 8px;
  font-size: 1.02rem;
  line-height: 1.5;
  color: var(--hm-paper);
}

.page-about .tl__text {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--hm-mute);
}

.page-about .tl__points {
  list-style: none;
  margin: 14px 0 0;
  padding: 12px 0 0;
  border-top: 1px dashed var(--hm-steel-2);
  display: grid;
  gap: 6px;
}

.page-about .tl__points li {
  position: relative;
  padding-left: 14px;
  font-size: 0.82rem;
  color: var(--hm-paper);
  opacity: 0.86;
}

.page-about .tl__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.58em;
  width: 7px;
  height: 2px;
  background: var(--hm-orange-lite);
  transform: skewX(-15deg);
}

/* ---------- 数据看台 ---------- */
.page-about .about-chapter--data {
  background: linear-gradient(180deg, var(--hm-ink), var(--hm-indigo) 130%);
  border-top: 1px solid var(--hm-hair);
  border-bottom: 1px solid var(--hm-hair);
}

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

.page-about .about-stat {
  padding: 20px 16px 18px;
  border: 1px solid var(--hm-hair);
  border-radius: var(--hm-radius);
  position: relative;
  overflow: hidden;
}

.page-about .about-stat::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--hm-orange), rgba(255, 90, 31, 0));
}

.page-about .about-stat .hm-stat__num {
  font-family: var(--hm-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(2.1rem, 8vw, 3rem);
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--hm-paper);
  margin: 0;
}

.page-about .about-stat__unit {
  font-size: 0.9rem;
  color: var(--hm-orange);
  margin-left: 4px;
  letter-spacing: 0.02em;
}

.page-about .about-stat .hm-stat__label {
  margin: 10px 0 0;
  font-size: 0.86rem;
  color: var(--hm-orange-lite);
  letter-spacing: 0.04em;
}

.page-about .about-stat__note {
  margin: 10px 0 0;
  font-size: 0.78rem;
  line-height: 1.68;
  color: var(--hm-mute);
}

/* ---------- 轮次运转 ---------- */
.page-about .about-rounds {
  display: grid;
  gap: 26px;
}

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

.page-about .about-step {
  position: relative;
  padding: 18px 18px 18px 22px;
  border-left: 2px solid var(--hm-steel-2);
  background: linear-gradient(90deg, rgba(31, 38, 46, 0.72), rgba(31, 38, 46, 0));
  border-radius: 0 var(--hm-radius) var(--hm-radius) 0;
  transition: border-color 0.18s var(--hm-ease);
}

.page-about .about-step:hover {
  border-left-color: var(--hm-orange);
}

.page-about .about-step__num {
  font-family: var(--hm-font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--hm-orange);
}

.page-about .about-step h3 {
  margin: 6px 0 8px;
  font-size: 1rem;
  color: var(--hm-paper);
}

.page-about .about-step p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--hm-mute);
}

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

/* ---------- 场馆 ---------- */
.page-about .about-chapter--venue {
  border-top: 1px solid var(--hm-hair);
  background:
    radial-gradient(90% 70% at 100% 0%, rgba(255, 90, 31, 0.10), transparent 62%),
    var(--hm-ink);
}

.page-about .about-venue {
  display: grid;
  gap: 22px;
}

.page-about .about-spec {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
  border-radius: var(--hm-radius);
  overflow: hidden;
}

.page-about .about-spec li {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas:
    "k v"
    "d d";
  gap: 4px 14px;
  padding: 16px 18px;
  background: var(--hm-ink-2);
  border-bottom: 1px solid var(--hm-hair);
}

.page-about .about-spec__k {
  grid-area: k;
  font-size: 0.86rem;
  color: var(--hm-paper);
  letter-spacing: 0.04em;
}

.page-about .about-spec__v {
  grid-area: v;
  font-family: var(--hm-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  color: var(--hm-orange);
  text-align: right;
}

.page-about .about-spec__d {
  grid-area: d;
  font-size: 0.8rem;
  line-height: 1.65;
  color: var(--hm-mute);
}

.page-about .about-venue__note {
  padding: 24px 20px;
  border: 1px solid var(--hm-hair);
  border-radius: var(--hm-radius);
}

.page-about .about-venue__note h3 {
  margin: 0 0 10px;
  font-size: 1.06rem;
  color: var(--hm-paper);
}

.page-about .about-venue__note p {
  margin: 0 0 18px;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--hm-mute);
}

/* ---------- 会员社区 ---------- */
.page-about .about-community {
  display: grid;
  gap: 22px;
}

.page-about .about-community__text p {
  margin: 0 0 14px;
  font-size: 0.94rem;
  line-height: 1.82;
  color: var(--hm-mute);
}

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

.page-about .about-community__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.page-about .about-community__stats li {
  padding: 14px 12px;
  background: var(--hm-steel-1);
  border-radius: 10px;
  border-left: 2px solid var(--hm-orange);
}

.page-about .about-community__stats strong {
  display: block;
  font-family: var(--hm-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.32rem;
  letter-spacing: -0.03em;
  color: var(--hm-paper);
}

.page-about .about-community__stats span {
  display: block;
  margin-top: 6px;
  font-size: 0.74rem;
  line-height: 1.5;
  color: var(--hm-mute);
}

/* ---------- 合作 ---------- */
.page-about .about-chapter--partners {
  border-top: 1px solid var(--hm-hair);
  background: linear-gradient(200deg, var(--hm-ink-2), var(--hm-ink) 70%);
}

.page-about .about-partners {
  display: grid;
  gap: 24px;
}

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

.page-about .about-flow__item {
  position: relative;
  padding: 18px 18px 18px 58px;
  background: var(--hm-ink-2);
  border: 1px solid var(--hm-hair);
  border-radius: var(--hm-radius);
}

.page-about .about-flow__num {
  position: absolute;
  left: 16px;
  top: 16px;
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  font-family: var(--hm-font-mono);
  font-size: 0.86rem;
  color: var(--hm-ink);
  background: var(--hm-orange);
  border-radius: 6px;
  transform: skewX(-12deg);
}

.page-about .about-flow__num::after {
  content: "";
}

.page-about .about-flow__item h3 {
  margin: 0 0 6px;
  font-size: 0.98rem;
  color: var(--hm-paper);
}

.page-about .about-flow__item p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--hm-mute);
}

.page-about .about-partners__panel {
  padding: 24px 20px;
  border: 1px solid rgba(37, 230, 200, 0.28);
  border-radius: var(--hm-radius);
}

.page-about .about-partners__panel h3 {
  margin: 10px 0 12px;
  font-size: 1.1rem;
  color: var(--hm-paper);
}

.page-about .about-partners__panel p {
  margin: 0 0 18px;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--hm-mute);
}

/* ---------- 更新节奏 ---------- */
.page-about .about-cadence {
  display: grid;
  gap: 12px;
}

.page-about .about-cadence__card {
  padding: 20px 18px;
  border: 1px solid var(--hm-hair);
  border-radius: var(--hm-radius);
  position: relative;
}

.page-about .about-cadence__card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 18px;
  width: 40px;
  height: 3px;
  background: linear-gradient(90deg, var(--hm-orange), var(--hm-cyan));
  transform: skewX(-15deg);
}

.page-about .about-cadence__card h3 {
  margin: 12px 0 8px;
  font-size: 1rem;
  color: var(--hm-paper);
}

.page-about .about-cadence__card p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.78;
  color: var(--hm-mute);
}

.page-about .about-next {
  margin-top: 34px;
  padding: 28px 22px;
  border: 1px solid var(--hm-hair);
  border-radius: var(--hm-radius);
  background:
    linear-gradient(140deg, rgba(255, 90, 31, 0.14), rgba(26, 38, 52, 0.9) 58%),
    var(--hm-ink-2);
  display: grid;
  gap: 20px;
}

.page-about .about-next h2 {
  margin: 0 0 10px;
  font-family: var(--hm-font-display);
  font-size: clamp(1.24rem, 4.4vw, 1.7rem);
  line-height: 1.32;
  letter-spacing: -0.015em;
  color: var(--hm-paper);
}

.page-about .about-next p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--hm-mute);
  max-width: 44ch;
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 平板 / 桌面 ---------- */
@media (min-width: 720px) {
  .page-about .about-chapter__head {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 24px;
    align-items: start;
  }

  .page-about .hm-section-num {
    font-size: 3.4rem;
  }

  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .about-spec li {
    grid-template-columns: 180px 1fr auto;
    grid-template-areas: "k d v";
    align-items: baseline;
  }

  .page-about .about-spec__v {
    font-size: 1.3rem;
  }

  .page-about .about-venue {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }

  .page-about .about-flow {
    gap: 14px;
  }

  .page-about .about-cadence {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding-bottom: 66px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: 7fr 5fr;
    gap: 48px;
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--hm-header-h) + 22px);
  }

  .page-about .tl {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 58px;
    row-gap: 20px;
    padding-left: 0;
  }

  .page-about .tl::before {
    left: 50%;
    margin-left: -1.5px;
    transform: skewX(-15deg);
    transform-origin: top center;
  }

  .page-about .tl__item:nth-child(odd) {
    grid-column: 1;
  }

  .page-about .tl__item:nth-child(even) {
    grid-column: 2;
  }

  .page-about .tl__item:nth-child(even)::before {
    left: auto;
    right: 16px;
    transform: skewX(-15deg);
  }

  .page-about .about-rounds {
    grid-template-columns: 7fr 5fr;
    gap: 34px;
    align-items: start;
  }

  .page-about .about-rounds__media {
    position: sticky;
    top: calc(var(--hm-header-h) + 26px);
  }

  .page-about .about-community {
    grid-template-columns: 6fr 6fr;
    grid-template-areas:
      "text media"
      "stats media";
    gap: 22px 34px;
    align-items: start;
  }

  .page-about .about-community__text {
    grid-area: text;
  }

  .page-about .about-community__media {
    grid-area: media;
  }

  .page-about .about-community__stats {
    grid-area: stats;
  }

  .page-about .about-partners {
    grid-template-columns: 7fr 5fr;
    gap: 34px;
    align-items: start;
  }

  .page-about .about-next {
    padding: 34px 30px;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 28px;
  }

  .page-about .about-next__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1180px) {
  .page-about .about-cadence {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-tl-media {
    margin-bottom: 42px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index .hm-toc__link,
  .page-about .tl__item,
  .page-about .about-step {
    transition: none;
  }
}
<<<END>>>