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

/* ===== 首屏 ===== */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 4vw, 40px) 0 clamp(38px, 6vw, 74px);
  border-bottom: 1px solid var(--line-soft);
  background:
    radial-gradient(130% 100% at 92% 0%, rgba(184, 145, 47, .16), transparent 64%),
    var(--ink);
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(116deg, rgba(110, 90, 46, .12) 0 1px, transparent 1px 28px);
  pointer-events: none;
}
.page-about .about-hero__grid {
  position: relative;
  display: grid;
  gap: clamp(26px, 5vw, 44px);
}
@media (min-width: 1000px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    align-items: end;
    gap: clamp(32px, 4.5vw, 68px);
  }
}
.page-about .about-hero h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(31px, 5.4vw, 56px);
  line-height: 1.15;
  letter-spacing: -.012em;
  color: var(--ivory);
  text-wrap: balance;
}
.page-about .about-hero .lede {
  margin: clamp(16px, 2.6vw, 24px) 0 0;
  max-width: 56ch;
  font-size: clamp(15px, 1.55vw, 17px);
  line-height: 1.85;
  color: var(--sand);
}
.page-about .about-quote {
  margin: clamp(22px, 3.6vw, 36px) 0 0;
  padding: 2px 0 2px clamp(16px, 2.4vw, 22px);
  border-left: 3px solid var(--cinnabar);
  font-family: var(--font-display);
  font-size: clamp(18px, 2.3vw, 25px);
  font-weight: 600;
  line-height: 1.62;
  color: var(--gold-bright);
}
.page-about .about-hero__cta {
  display: inline-flex;
  margin-top: clamp(20px, 3vw, 30px);
}
.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  background: var(--slate);
  box-shadow: inset 0 0 0 1px var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}
.page-about .about-hero__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  filter: saturate(.72) contrast(1.06);
}
.page-about .about-hero__cap {
  display: block;
  padding: 10px 14px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--gold-mist);
  background: rgba(11, 12, 14, .86);
}
.page-about .about-hero__note {
  display: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .26em;
  color: var(--gold-mist);
  writing-mode: vertical-rl;
}
@media (min-width: 1200px) {
  .page-about .about-hero__note {
    display: block;
    position: absolute;
    top: 2px;
    right: -6px;
  }
}

/* ===== 主体两栏 ===== */
.page-about .about-main {
  padding: clamp(38px, 6vw, 72px) 0 clamp(44px, 7vw, 84px);
}
.page-about .about-body {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
}
@media (min-width: 940px) {
  .page-about .about-body {
    grid-template-columns: 216px minmax(0, 1fr);
    gap: clamp(40px, 5vw, 72px);
    align-items: start;
  }
}

/* ===== 章节导航 ===== */
.page-about .about-rail__label {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .3em;
  color: var(--gold-mist);
}
.page-about .about-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}
.page-about .about-rail__list::-webkit-scrollbar {
  display: none;
}
.page-about .about-rail__item {
  flex: none;
}
.page-about .about-rail__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 13px;
  font-size: 13.5px;
  line-height: 1.2;
  white-space: nowrap;
  color: var(--sand);
  text-decoration: none;
  border: 1px solid var(--line-soft);
  background: var(--ink-2);
  transition: color .25s var(--ease), border-color .25s var(--ease), background .25s var(--ease);
}
.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--gold-bright);
  border-color: var(--gold);
  background: rgba(184, 145, 47, .1);
}
.page-about .about-rail__num {
  font-size: 11px;
  color: var(--gold);
}
@media (min-width: 940px) {
  .page-about .about-rail {
    position: sticky;
    top: 96px;
  }
  .page-about .about-rail__list {
    display: block;
    overflow: visible;
    padding: 0;
  }
  .page-about .about-rail__link {
    padding: 10px 0 10px 14px;
    border: 0;
    border-left: 1px solid var(--line-soft);
    background: transparent;
    white-space: normal;
  }
  .page-about .about-rail__link:hover,
  .page-about .about-rail__link:focus-visible {
    border-left-color: var(--gold);
    background: transparent;
  }
}

/* ===== 章节通用 ===== */
.page-about .about-chapter {
  scroll-margin-top: 104px;
}
.page-about .about-chapter + .about-chapter {
  margin-top: clamp(36px, 5vw, 62px);
  padding-top: clamp(28px, 4vw, 46px);
  border-top: 1px solid var(--line-soft);
}
.page-about .about-chapter__title {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 clamp(14px, 2vw, 20px);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 2.9vw, 31px);
  line-height: 1.32;
  color: var(--ivory);
}
.page-about .about-chapter__num {
  flex: none;
  padding: 3px 8px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--gold);
  border: 1px solid var(--line);
}
.page-about .about-chapter p {
  margin: 0 0 14px;
  max-width: 66ch;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--sand);
}
.page-about .about-chapter p:last-child {
  margin-bottom: 0;
}
.page-about .about-chapter p a {
  color: var(--gold-bright);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: border-color .25s var(--ease);
}
.page-about .about-chapter p a:hover,
.page-about .about-chapter p a:focus-visible {
  border-bottom-color: var(--gold-bright);
}

/* ===== 团队四象限 ===== */
.page-about .about-matrix {
  display: grid;
  gap: 11px;
  margin-top: clamp(20px, 3vw, 28px);
}
@media (min-width: 640px) {
  .page-about .about-matrix {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
.page-about .about-cell {
  padding: 1px;
  background: linear-gradient(150deg, rgba(184, 145, 47, .5), rgba(110, 90, 46, .1) 56%, rgba(110, 90, 46, .38));
  clip-path: polygon(var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%, 0 var(--cut));
  transition: transform .3s var(--ease);
}
.page-about .about-cell:hover {
  transform: translateY(-2px);
}
.page-about .about-cell__in {
  display: flex;
  flex-direction: column;
  gap: 8px;
  height: 100%;
  padding: clamp(16px, 2.4vw, 24px);
  background: var(--ink-2);
  clip-path: polygon(var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%, 0 var(--cut));
}
.page-about .about-cell__tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--gold-mist);
}
.page-about .about-cell__title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin: 0;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  color: var(--ivory);
}
.page-about .about-cell__count {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--gold-bright);
}
.page-about .about-cell__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--sand);
}

/* ===== 赛季节奏 ===== */
.page-about .about-rhythm {
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-soft);
}
.page-about .about-rhythm__row {
  display: grid;
  gap: 4px;
  padding: 15px 0 15px 16px;
  border-bottom: 1px solid var(--line-soft);
  border-left: 2px solid transparent;
  transition: border-color .25s var(--ease), background .25s var(--ease);
}
.page-about .about-rhythm__row:hover {
  border-left-color: var(--gold);
  background: rgba(184, 145, 47, .05);
}
@media (min-width: 620px) {
  .page-about .about-rhythm__row {
    grid-template-columns: 104px minmax(0, 1fr);
    gap: 18px;
    align-items: baseline;
  }
}
.page-about .about-rhythm__key {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--gold-bright);
}
.page-about .about-rhythm__val {
  font-size: 15px;
  line-height: 1.8;
  color: var(--sand);
}

/* ===== 上线流程 ===== */
.page-about .about-flow {
  display: grid;
  gap: 12px;
  margin: clamp(18px, 3vw, 26px) 0 clamp(18px, 3vw, 26px);
  padding: 0;
  list-style: none;
}
@media (min-width: 760px) {
  .page-about .about-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
  }
  .page-about .about-flow__step + .about-flow__step {
    padding-left: clamp(16px, 2vw, 26px);
  }
}
.page-about .about-flow__step {
  position: relative;
  padding: 18px 18px 18px 0;
  border-top: 1px solid var(--line-soft);
}
.page-about .about-flow__step::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 36px;
  height: 2px;
  background: var(--gold);
}
.page-about .about-flow__idx {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--gold);
}
.page-about .about-flow__name {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  color: var(--ivory);
}
.page-about .about-flow__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--sand);
}

/* ===== 阶段时间轴 ===== */
.page-about .about-timeline {
  position: relative;
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: 0 0 0 26px;
  list-style: none;
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold), var(--gold-mist) 56%, transparent);
}
.page-about .about-timeline__item {
  position: relative;
  padding-bottom: 12px;
}
.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 12px;
  width: 8px;
  height: 8px;
  background: var(--ink);
  border: 1px solid var(--gold);
  transform: rotate(45deg);
}
.page-about .about-stage__head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px;
  padding: 7px 0;
  cursor: pointer;
  list-style: none;
}
.page-about .about-stage__head::-webkit-details-marker {
  display: none;
}
.page-about .about-stage__head::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1;
  color: var(--gold-mist);
}
.page-about .about-stage[open] .about-stage__head::after {
  content: "—";
  color: var(--gold-bright);
}
.page-about .about-stage__phase {
  padding: 2px 7px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--gold);
  border: 1px solid var(--line);
}
.page-about .about-stage__title {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  color: var(--ivory);
}
.page-about .about-stage p {
  margin: 0 0 12px;
  max-width: 62ch;
  padding-left: 2px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--sand);
}

/* ===== 服务范围 ===== */
.page-about .about-scope {
  display: grid;
  gap: 16px;
  margin: clamp(18px, 3vw, 26px) 0 clamp(18px, 3vw, 26px);
}
@media (min-width: 720px) {
  .page-about .about-scope {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(18px, 3vw, 32px);
  }
}
.page-about .about-scope__col {
  padding-top: 15px;
  border-top: 2px solid var(--gold-mist);
}
.page-about .about-scope__col--jade {
  border-top-color: var(--jade);
}
.page-about .about-scope__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  color: var(--ivory);
}
.page-about .about-scope__list {
  display: grid;
  gap: 9px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-scope__item {
  position: relative;
  padding-left: 16px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--sand);
}
.page-about .about-scope__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: .74em;
  width: 6px;
  height: 1px;
  background: var(--gold);
}
.page-about .about-scope__col--jade .about-scope__item::before {
  background: var(--jade-lit);
}

/* ===== 通用配图 ===== */
.page-about .about-figure {
  margin: clamp(18px, 3vw, 26px) 0 0;
  background: var(--slate);
  box-shadow: inset 0 0 0 1px var(--line-soft);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut-sm)), calc(100% - var(--cut-sm)) 100%, 0 100%);
}
.page-about .about-figure__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.7) contrast(1.05);
}
.page-about .about-figure__cap {
  display: block;
  padding: 10px 14px;
  font-size: 12px;
  color: var(--gold-mist);
  background: rgba(11, 12, 14, .85);
}

/* ===== 收束区 ===== */
.page-about .about-cta {
  margin-top: clamp(36px, 5vw, 62px);
  padding: clamp(28px, 4.5vw, 52px) clamp(20px, 3.4vw, 40px);
  border: 1px solid var(--line);
  background:
    linear-gradient(150deg, rgba(184, 145, 47, .12), transparent 58%),
    var(--ink-2);
  clip-path: polygon(var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%, 0 var(--cut));
}
.page-about .about-cta__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(21px, 2.9vw, 29px);
  font-weight: 700;
  line-height: 1.36;
  color: var(--ivory);
}
.page-about .about-cta__text {
  margin: 0 0 clamp(20px, 3vw, 28px);
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--sand);
}
.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
<<<END>>>