.page-about {
  --about-idx: 72px;
  --about-hair: rgba(169, 192, 201, 0.16);
  background: var(--ink);
  color: var(--cream);
  padding-bottom: clamp(40px, 6vw, 96px);
}

.page-about .about-wrap {
  padding-top: clamp(14px, 2vw, 24px);
}

.page-about .breadcrumb {
  margin-bottom: clamp(14px, 2vw, 24px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(16px, 3vw, 34px) 0 clamp(30px, 4.5vw, 62px);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: -38%;
  right: -18%;
  width: 58%;
  height: 170%;
  background: linear-gradient(158deg, rgba(232, 69, 44, 0.26), rgba(14, 43, 36, 0.92) 62%);
  border-radius: 50% 0 0 62%;
  transform: rotate(-9deg);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero > * {
  position: relative;
  z-index: 1;
}

.page-about .about-hero-kicker {
  color: var(--gold);
  margin: 0 0 clamp(12px, 2vw, 20px);
}

.page-about .about-h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(34px, 6.4vw, 88px);
  line-height: 1.06;
  letter-spacing: -0.03em;
  color: var(--cream);
  max-width: 18ch;
}

.page-about .about-h1 em {
  font-style: normal;
  font-weight: 900;
  color: var(--chili);
  letter-spacing: -0.04em;
}

.page-about .about-lede {
  margin: clamp(16px, 2.4vw, 26px) 0 0;
  max-width: 36em;
  color: var(--frost);
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.8;
}

.page-about .about-hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  padding: 0;
  list-style: none;
}

/* ---------- 主体两栏 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--gap);
  margin-top: clamp(20px, 3vw, 40px);
}

.page-about .about-rail {
  display: none;
}

.page-about .about-rail-nav {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding-left: 14px;
  border-left: 1px solid var(--about-hair);
}

.page-about .about-rail-link {
  display: flex;
  flex-direction: column;
  gap: 3px;
  text-decoration: none;
  color: var(--sage);
  transition: color 0.2s ease;
}

.page-about .about-rail-num {
  font-size: 12px;
  color: var(--gold);
  letter-spacing: 0.06em;
}

.page-about .about-rail-text {
  font-size: 12px;
  letter-spacing: 0.18em;
}

.page-about .about-rail-link:hover .about-rail-text,
.page-about .about-rail-link:focus-visible .about-rail-text {
  color: var(--cream);
}

.page-about .about-rail-scale {
  display: block;
  width: 1px;
  height: 64px;
  margin: 22px 0 0 14px;
  background: linear-gradient(180deg, var(--chili), transparent);
}

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

/* ---------- 章节 ---------- */
.page-about .about-section {
  border-top: 1px solid var(--about-hair);
  padding-block: clamp(30px, 4.4vw, 62px);
  scroll-margin-top: calc(var(--bar-space) + 20px);
}

.page-about .about-flow > .about-section:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-section-head .u-index {
  color: var(--gold);
  margin: 0 0 10px;
}

.page-about .about-h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(23px, 3.4vw, 42px);
  line-height: 1.24;
  letter-spacing: -0.02em;
  color: var(--cream);
  max-width: 22ch;
}

.page-about .about-copy {
  margin-top: clamp(16px, 2.4vw, 26px);
}

.page-about .about-copy--tight {
  margin-top: 16px;
  padding: clamp(16px, 2.4vw, 22px);
  background: var(--panel);
  border-radius: var(--r-m);
  color: var(--sage);
  line-height: 1.8;
}

.page-about .about-copy p {
  margin: 0 0 14px;
  max-width: 36em;
  color: var(--frost);
  font-size: 16px;
  line-height: 1.85;
}

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

.page-about .about-inline-link {
  color: var(--chili);
  text-decoration: none;
  border-bottom: 1px solid rgba(232, 69, 44, 0.5);
  padding-bottom: 1px;
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  color: var(--chili-light);
}

/* ---------- 错位双栏与图片 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 34px);
  margin-top: clamp(18px, 2.6vw, 30px);
}

.page-about .about-figure {
  margin: 0;
  min-width: 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--r-l);
  object-fit: cover;
  background: var(--panel);
}

.page-about .about-figure--slant {
  clip-path: polygon(0 0, 100% 3.5%, 100% 100%, 0 96.5%);
}

.page-about .about-figure--slant img {
  border-radius: 0;
}

.page-about .about-figure .media-cap {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--sage);
}

/* ---------- 时间线 ---------- */
.page-about .about-tl {
  display: block;
  width: 100%;
  height: auto;
  margin-top: clamp(16px, 2.4vw, 24px);
  overflow: visible;
}

.page-about .about-milestones {
  margin-top: clamp(10px, 1.6vw, 16px);
}

.page-about .about-milestone {
  border-top: 1px solid var(--about-hair);
}

.page-about .about-milestone:last-child {
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-milestone > summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(12px, 2.4vw, 28px);
  padding: clamp(14px, 2vw, 22px) 0;
  cursor: pointer;
  list-style: none;
}

.page-about .about-milestone > summary::-webkit-details-marker {
  display: none;
}

.page-about .about-year {
  font-size: clamp(21px, 2.8vw, 32px);
  font-weight: 300;
  letter-spacing: -0.02em;
  color: var(--sage);
  transition: color 0.25s ease;
}

.page-about .about-ms-title {
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.5;
  color: var(--cream);
}

.page-about .about-milestone > summary::after {
  content: "+";
  justify-self: end;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--gold);
}

.page-about .about-milestone[open] > summary::after {
  content: "−";
  color: var(--chili);
}

.page-about .about-milestone[open] .about-year {
  color: var(--chili);
}

.page-about .about-ms-body {
  padding: 0 0 clamp(16px, 2.2vw, 24px);
}

.page-about .about-ms-body p {
  margin: 0;
  max-width: 38em;
  color: var(--frost);
  font-size: 15px;
  line-height: 1.85;
}

/* ---------- 横向主题带 ---------- */
.page-about .about-band {
  display: flex;
  gap: 12px;
  margin-top: clamp(16px, 2.4vw, 24px);
  padding: 4px 0 16px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-band-item {
  flex: 0 0 min(80%, 290px);
  scroll-snap-align: start;
  background: var(--panel);
  border: 1px solid var(--about-hair);
  border-radius: var(--r-m);
  padding: clamp(16px, 2.2vw, 22px);
}

.page-about .about-band-item .u-index {
  color: var(--gold);
  margin: 0 0 8px;
}

.page-about .about-band-item h3 {
  margin: 0 0 8px;
  font-size: 19px;
  font-weight: 500;
  color: var(--cream);
}

.page-about .about-band-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--sage);
}

/* ---------- 频道列表 ---------- */
.page-about .about-channels {
  margin-top: clamp(14px, 2vw, 22px);
}

.page-about .about-channel {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: clamp(16px, 2.2vw, 22px) 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-channel:last-child {
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-channel-idx {
  margin: 0;
  font-size: 13px;
  color: var(--chili);
  letter-spacing: 0.08em;
}

.page-about .about-channel h3 {
  margin: 0 0 6px;
  font-size: clamp(19px, 2vw, 23px);
  font-weight: 500;
  color: var(--cream);
}

.page-about .about-channel-body p {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--frost);
}

.page-about .about-channel-link {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid var(--lift);
  background: var(--lift);
  color: var(--frost);
  font-size: 13px;
  text-decoration: none;
  transition: background 0.2s ease, color 0.2s ease;
}

.page-about .about-channel-link:hover,
.page-about .about-channel-link:focus-visible {
  background: var(--chili);
  border-color: var(--chili);
  color: var(--cream);
}

/* ---------- 团队 ---------- */
.page-about .about-crew {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-crew li {
  background: var(--slate);
  border-radius: var(--r-m);
  padding: clamp(14px, 2vw, 18px);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-crew-num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.6vw, 38px);
  line-height: 1;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}

.page-about .about-crew-label {
  font-size: 13px;
  color: var(--sage);
  letter-spacing: 0.06em;
}

/* ---------- 合作 ---------- */
.page-about .about-partner-nums {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: clamp(16px, 2.4vw, 22px);
}

.page-about .about-partner-num {
  background: var(--panel);
  border-radius: var(--r-m);
  padding: clamp(14px, 2vw, 20px);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-big {
  font-size: clamp(30px, 4.4vw, 46px);
  line-height: 1;
  color: var(--chili);
  font-variant-numeric: tabular-nums;
}

.page-about .about-big-label {
  font-size: 13px;
  color: var(--sage);
}

.page-about .about-more {
  margin: 14px 0 0;
}

/* ---------- 一周节奏 ---------- */
.page-about .about-week {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
}

.page-about .about-week-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: clamp(12px, 1.8vw, 16px) 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-week-row:last-of-type {
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-week dt {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--steel);
}

.page-about .about-week dd {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--frost);
}

/* ---------- 联络 ---------- */
.page-about .about-contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: clamp(16px, 2.4vw, 24px);
}

.page-about .about-contact-card {
  background: var(--panel);
  border-radius: var(--r-m);
  border-left: 3px solid var(--chili);
  padding: clamp(16px, 2.2vw, 22px);
}

.page-about .about-contact-card .u-index {
  color: var(--gold);
  margin: 0 0 6px;
}

.page-about .about-contact-val {
  margin: 0 0 8px;
  font-size: clamp(16px, 1.8vw, 19px);
  color: var(--cream);
  word-break: break-word;
}

.page-about .about-contact-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--sage);
}

/* ---------- 结尾行动区 ---------- */
.page-about .about-cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  margin-top: clamp(22px, 3.2vw, 40px);
  padding: clamp(22px, 3.4vw, 40px);
  border-radius: var(--r-l);
  background: linear-gradient(135deg, var(--lift), var(--panel) 68%);
  border: 1px solid var(--about-hair);
}

.page-about .about-cta .u-index {
  color: var(--gold);
  margin: 0 0 8px;
}

.page-about .about-cta-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(20px, 2.6vw, 28px);
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--cream);
}

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

.page-about .about-cta-actions .btn {
  text-decoration: none;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .about-crew {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-band-item {
    flex-basis: min(48%, 300px);
  }
}

@media (min-width: 820px) {
  .page-about .about-contact-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

  .page-about .about-week-row {
    grid-template-columns: 132px minmax(0, 1fr);
    align-items: baseline;
    gap: 18px;
  }
}

@media (min-width: 900px) {
  .page-about .about-body {
    grid-template-columns: var(--about-idx) minmax(0, 1fr);
    gap: clamp(22px, 3.4vw, 56px);
  }

  .page-about .about-rail {
    display: block;
    position: sticky;
    top: calc(var(--bar-space) + 26px);
    align-self: start;
    height: max-content;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
    align-items: start;
    gap: clamp(22px, 3.2vw, 44px);
  }

  .page-about .about-split--flip > .about-figure {
    order: 2;
  }

  .page-about .about-split--flip > .about-copy {
    order: 1;
  }

  .page-about .about-figure {
    margin-top: 8px;
  }

  .page-about .about-split--flip .about-figure {
    margin-top: 0;
  }

  .page-about .about-channel {
    grid-template-columns: 56px minmax(0, 1fr) auto;
    align-items: start;
    gap: clamp(14px, 2vw, 26px);
  }

  .page-about .about-channel-idx {
    padding-top: 4px;
  }

  .page-about .about-channel-link {
    align-self: center;
  }

  .page-about .about-band-item {
    flex-basis: 300px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero {
    padding-bottom: clamp(48px, 5vw, 76px);
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  .page-about .about-band {
    scroll-snap-type: none;
  }
}
<<<END>>>