.page-about {
  --about-line: 2px solid rgba(255, 255, 255, 0.16);
  --about-line-soft: 2px solid rgba(255, 255, 255, 0.1);
  --about-num: rgba(255, 255, 255, 0.2);
  --about-measure: 68ch;
  background: var(--ink);
  color: var(--white);
  font-family: var(--f-sans);
  overflow-x: hidden;
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-about .breadcrumb {
  padding-top: clamp(18px, 3.5vw, 32px);
  font-size: 14px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  padding-top: clamp(24px, 4vw, 44px);
  padding-bottom: clamp(32px, 6vw, 72px);
}

.page-about .about-hero__title {
  font-family: var(--f-serif);
  font-weight: 700;
  font-size: clamp(34px, 6.2vw, 62px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: clamp(10px, 1.6vw, 18px) 0 clamp(16px, 2.4vw, 24px);
}

.page-about .about-hero__lead {
  max-width: 56ch;
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.78;
  color: rgba(255, 255, 255, 0.82);
  margin: 0 0 clamp(20px, 3vw, 32px);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 0;
  padding: clamp(14px, 2.4vw, 22px) 0 0;
  border-top: var(--about-line);
  display: flex;
  flex-wrap: wrap;
  gap: 12px clamp(16px, 3vw, 34px);
}

.page-about .about-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--dim);
}

.page-about .about-hero__facts .num {
  font-family: var(--f-num);
  font-size: 22px;
  font-weight: 700;
  color: var(--white);
  font-variant-numeric: tabular-nums;
}

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

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

/* ---------- 章节通用双栏 ---------- */
.page-about .about-section {
  display: grid;
  gap: clamp(18px, 3vw, 32px);
  padding: clamp(32px, 5vw, 56px) 0;
  border-top: var(--about-line);
}

.page-about .about-section__aside {
  position: relative;
}

.page-about .about-section__num {
  display: block;
  font-family: var(--f-serif);
  font-weight: 700;
  font-size: clamp(44px, 7vw, 76px);
  line-height: 0.92;
  letter-spacing: -0.03em;
  color: var(--about-num);
  transition: color var(--dur) ease;
}

.page-about .about-section:hover .about-section__num,
.page-about .about-section:focus-within .about-section__num {
  color: var(--accent);
}

.page-about .about-section__note {
  margin: 14px 0 0;
  padding-left: 12px;
  border-left: 4px solid var(--accent);
  font-size: 14px;
  line-height: 1.7;
  color: var(--dim);
}

.page-about .about-section__body {
  max-width: var(--about-measure);
}

.page-about .about-section__body h2 {
  font-family: var(--f-serif);
  font-weight: 700;
  font-size: clamp(24px, 3.2vw, 36px);
  line-height: 1.24;
  letter-spacing: -0.01em;
  margin: 0 0 clamp(14px, 2vw, 22px);
}

.page-about .about-section__body p {
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.78;
  color: rgba(255, 255, 255, 0.84);
  margin: 0 0 1em;
}

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

/* ---------- 团队分工 ---------- */
.page-about .about-roles {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  counter-reset: role;
}

.page-about .about-roles li {
  position: relative;
  padding: clamp(18px, 2.6vw, 26px) 0 clamp(18px, 2.6vw, 26px) clamp(50px, 8vw, 74px);
  border-top: var(--about-line-soft);
}

.page-about .about-roles li:last-child {
  border-bottom: var(--about-line-soft);
}

.page-about .about-roles li::before {
  counter-increment: role;
  content: counter(role, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: clamp(20px, 2.8vw, 28px);
  font-family: var(--f-num);
  font-size: 15px;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.page-about .about-roles__title {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 8px;
  font-family: var(--f-sans);
  font-size: 17px;
  font-weight: 700;
}

.page-about .about-roles__count {
  font-family: var(--f-num);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.page-about .about-roles__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: rgba(255, 255, 255, 0.76);
}

/* ---------- 纸白翻面：联赛覆盖 ---------- */
.page-about .about-cover {
  background: var(--paper);
  color: var(--ink);
  border-top: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
  margin: clamp(16px, 3vw, 32px) 0;
}

.page-about .about-cover__inner {
  display: grid;
  gap: clamp(18px, 3vw, 32px);
  padding: clamp(36px, 6vw, 72px) 0;
}

.page-about .about-cover .about-section__num {
  color: rgba(28, 28, 30, 0.18);
}

.page-about .about-cover:hover .about-section__num,
.page-about .about-cover:focus-within .about-section__num {
  color: var(--accent);
}

.page-about .about-cover .about-section__note {
  color: var(--muted);
}

.page-about .about-cover .about-section__body p {
  color: #3b3b3f;
}

.page-about .about-table-wrap {
  overflow-x: auto;
  margin: clamp(18px, 3vw, 28px) 0 clamp(18px, 3vw, 26px);
  -webkit-overflow-scrolling: touch;
}

.page-about .about-table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 15px;
}

.page-about .about-table th,
.page-about .about-table td {
  text-align: left;
  vertical-align: top;
  padding: 14px 18px 14px 0;
  border-bottom: 2px solid rgba(28, 28, 30, 0.14);
  line-height: 1.6;
}

.page-about .about-table thead th {
  font-family: var(--f-sans);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 2px solid var(--ink);
  white-space: nowrap;
}

.page-about .about-table tbody th {
  font-weight: 700;
  color: var(--ink);
  white-space: nowrap;
}

.page-about .about-table tbody td {
  color: #4a4a4f;
}

.page-about .about-table tbody tr {
  transition: background-color var(--dur) ease;
}

.page-about .about-table tbody tr:hover {
  background: rgba(28, 28, 30, 0.045);
}

/* ---------- 流程 ---------- */
.page-about .about-banner {
  margin: 0 0 clamp(20px, 3vw, 32px);
}

.page-about .about-banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 7 / 3;
  object-fit: cover;
}

.page-about .about-steps {
  list-style: none;
  margin: 0 0 clamp(20px, 3vw, 30px);
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-steps a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border: 2px solid rgba(255, 255, 255, 0.22);
  color: var(--white);
  font-size: 14px;
  text-decoration: none;
  transition: border-color var(--dur) ease, background-color var(--dur) ease;
}

.page-about .about-steps a:hover,
.page-about .about-steps a:focus-visible {
  border-color: var(--accent);
  background: rgba(255, 255, 255, 0.06);
}

.page-about .about-steps__num {
  font-family: var(--f-num);
  font-weight: 700;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.page-about .about-step {
  border-top: var(--about-line-soft);
  padding: clamp(18px, 2.6vw, 26px) 0 clamp(18px, 2.6vw, 26px) 18px;
  scroll-margin-top: 96px;
  transition: background-color var(--dur) ease, box-shadow var(--dur) ease;
}

.page-about .about-step:last-of-type {
  border-bottom: var(--about-line-soft);
}

.page-about .about-step:target {
  background: rgba(255, 255, 255, 0.05);
  box-shadow: inset 4px 0 0 0 var(--winter);
}

.page-about .about-step__title {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 8px;
  font-family: var(--f-sans);
  font-size: 17px;
  font-weight: 700;
  transition: color var(--dur) ease;
}

.page-about .about-step__title span {
  font-family: var(--f-num);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--accent);
}

.page-about .about-step:target .about-step__title {
  color: var(--winter);
}

.page-about .about-step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: rgba(255, 255, 255, 0.78);
}

/* ---------- 四季看板 ---------- */
.page-about .about-season {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  margin-top: clamp(18px, 3vw, 28px);
}

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

.page-about .about-season__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.page-about .about-season__text p {
  margin: 0 0 1em;
}

.page-about .about-seasons {
  list-style: none;
  margin: 0 0 1em;
  padding: 0;
}

.page-about .about-seasons li {
  display: grid;
  gap: 4px;
  padding: 12px 0;
  border-bottom: 2px solid rgba(255, 255, 255, 0.1);
  font-size: 15px;
  line-height: 1.68;
  color: rgba(255, 255, 255, 0.76);
}

.page-about .about-seasons li:first-child {
  border-top: 2px solid rgba(255, 255, 255, 0.1);
}

.page-about .about-seasons__key {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  color: var(--white);
}

.page-about .about-seasons__dot {
  display: inline-block;
  width: 12px;
  height: 12px;
  flex: none;
}

.page-about .about-seasons__dot--spring {
  background: var(--spring);
}

.page-about .about-seasons__dot--summer {
  background: var(--summer);
}

.page-about .about-seasons__dot--autumn {
  background: var(--autumn);
}

.page-about .about-seasons__dot--winter {
  background: var(--winter);
}

/* ---------- 合作 ---------- */
.page-about .about-partners {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(16px, 2.4vw, 24px);
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.page-about .about-partners li {
  border-top: 2px solid var(--accent);
  padding-top: 14px;
}

.page-about .about-partners h3 {
  margin: 0 0 8px;
  font-family: var(--f-sans);
  font-size: 16px;
  font-weight: 700;
}

.page-about .about-partners p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: rgba(255, 255, 255, 0.76);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  margin-top: clamp(28px, 5vw, 52px);
  padding-top: clamp(24px, 4vw, 40px);
  border-top: 2px solid var(--accent);
  display: grid;
  gap: clamp(18px, 3vw, 32px);
}

.page-about .about-cta h2 {
  font-family: var(--f-serif);
  font-weight: 700;
  font-size: clamp(22px, 2.8vw, 30px);
  line-height: 1.26;
  margin: 0 0 10px;
}

.page-about .about-cta p {
  margin: 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.76;
  color: rgba(255, 255, 255, 0.78);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 桌面布局 ---------- */
@media (min-width: 880px) {
  .page-about .about-section {
    grid-template-columns: minmax(0, 200px) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 72px);
  }

  .page-about .about-cover__inner {
    grid-template-columns: minmax(0, 200px) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 72px);
  }

  .page-about .about-section__aside {
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-about .about-cover__inner .about-section__aside {
    position: sticky;
    top: 96px;
    align-self: start;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1fr) minmax(280px, 400px);
    align-items: end;
  }
}

@media (min-width: 760px) {
  .page-about .about-season {
    grid-template-columns: minmax(0, 260px) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-seasons li {
    grid-template-columns: 96px minmax(0, 1fr);
    align-items: baseline;
  }
}

@media (min-width: 800px) {
  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

/* ---------- 窄屏 ---------- */
@media (max-width: 560px) {
  .page-about .about-section__body {
    max-width: none;
  }

  .page-about .about-roles li {
    padding-left: 40px;
  }

  .page-about .about-table {
    min-width: 480px;
    font-size: 14px;
  }

  .page-about .about-table th,
  .page-about .about-table td {
    padding-right: 12px;
  }

  .page-about .about-step {
    padding-left: 12px;
  }
}