.page-about {
  --about-rule: rgba(232, 242, 236, 0.13);
  --about-clay-soft: rgba(180, 71, 42, 0.18);
  background-color: var(--night);
  color: var(--mist);
  overflow-x: hidden;
  padding-bottom: clamp(56px, 8vw, 118px);
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding: clamp(18px, 3vw, 34px) 0 0;
}

/* ---------- 开篇：展览式横向阅读带 ---------- */
.page-about .about-masthead {
  position: relative;
  padding: clamp(32px, 5.5vw, 76px) 0 clamp(46px, 7vw, 98px);
}

.page-about .about-masthead::after {
  content: "";
  position: absolute;
  left: -8vw;
  right: -8vw;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--lime) 20%, var(--cyan) 70%, transparent);
  opacity: 0.42;
  transform: rotate(-1.3deg);
  transform-origin: left center;
}

.page-about .masthead-rot {
  display: none;
}

.page-about .masthead-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 40px);
  align-items: start;
}

.page-about .masthead-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.page-about .masthead-title {
  margin: clamp(12px, 2vw, 20px) 0 clamp(16px, 2.4vw, 24px);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 7vw, 60px);
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.page-about .masthead-title .title-sub {
  display: block;
  margin-top: clamp(12px, 1.8vw, 18px);
  max-width: 30ch;
  font-size: clamp(16px, 2.6vw, 22px);
  font-weight: 600;
  line-height: 1.55;
  letter-spacing: 0;
  color: var(--slate);
}

.page-about .masthead-main .lede {
  max-width: 46ch;
  font-size: clamp(16px, 1.9vw, 18px);
  line-height: 1.82;
  color: var(--mist);
}

.page-about .masthead-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 20px;
  margin: clamp(26px, 3.4vw, 42px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .masthead-facts li {
  padding-top: 12px;
  border-top: 1px solid var(--about-rule);
}

.page-about .fact-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.2vw, 30px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--lime);
}

.page-about .fact-num--orange {
  color: var(--orange);
}

.page-about .fact-label {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  color: var(--slate);
}

.page-about .masthead-index {
  padding: clamp(16px, 2.4vw, 22px);
  border: 1px solid var(--about-rule);
  border-radius: var(--r);
  background: var(--glass);
  backdrop-filter: blur(8px);
}

.page-about .index-head {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.28em;
  color: var(--slate);
}

.page-about .index-list {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .index-link {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 9px 10px;
  border-radius: var(--r-sm);
  color: var(--mist);
  font-size: 15px;
  text-decoration: none;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .index-link .index-no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-about .index-link:hover {
  background: var(--glass-2);
  color: var(--lime);
}

.page-about .index-link:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
  background: var(--glass-2);
}

/* ---------- 章节基线 ---------- */
.page-about .section {
  padding: clamp(56px, 8vw, 118px) 0 0;
}

.page-about .section-head {
  margin-bottom: clamp(24px, 3.4vw, 42px);
}

.page-about .section-index {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.page-about .section-title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(25px, 4.4vw, 38px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-about .section-note {
  max-width: 62ch;
  margin: 14px 0 0;
  font-size: clamp(14px, 1.7vw, 16px);
  line-height: 1.8;
  color: var(--slate);
}

/* ---------- 01 自述 ---------- */
.page-about .statement-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 3.6vw, 48px);
  align-items: start;
}

.page-about .statement-p {
  max-width: 58ch;
  margin: 0 0 18px;
  font-size: clamp(16px, 1.85vw, 18px);
  line-height: 1.84;
}

.page-about .statement-copy .side-note {
  max-width: 46ch;
  margin: clamp(24px, 3vw, 34px) 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--lime);
  font-size: 14px;
  line-height: 1.8;
  color: var(--slate);
}

.page-about .statement-figure {
  margin: 0;
}

.page-about .media-caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 02 教练履历 ---------- */
.page-about .coach-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.4vw, 44px);
  align-items: start;
}

.page-about .stage-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.page-about .coach-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--about-rule);
  border-radius: var(--r);
  background: var(--stand);
}

.page-about .coach-table {
  width: 100%;
  min-width: 480px;
  margin: 0;
}

.page-about .coach-caption {
  caption-side: top;
  padding: 14px 16px 4px;
  font-size: 12px;
  line-height: 1.7;
  text-align: left;
  color: var(--slate);
}

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

.page-about .coach-table tbody tr:hover,
.page-about .coach-table tbody tr:focus-within {
  background: rgba(199, 255, 74, 0.07);
}

.page-about .coach-figure {
  margin: 0;
}

/* ---------- 03 团队分工 ---------- */
.page-about .team-band {
  border-top: 1px solid var(--about-rule);
}

.page-about .team-row {
  display: block;
  padding: clamp(18px, 2.6vw, 26px) clamp(6px, 1.2vw, 16px);
  border-bottom: 1px solid var(--about-rule);
  transition: background-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .team-row:hover {
  background: var(--glass);
  transform: translateX(3px);
}

.page-about .team-num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: clamp(30px, 4.6vw, 46px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--lime);
}

.page-about .team-role {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.3vw, 21px);
  font-weight: 800;
  color: var(--mist);
}

.page-about .team-body p {
  max-width: 62ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
}

.page-about .team-tag {
  display: inline-block;
  margin-top: 12px;
}

.page-about .team-figure {
  margin: clamp(24px, 3.4vw, 42px) 0 0;
}

/* ---------- 04 云南 ---------- */
.page-about .yunnan-block {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 4vw, 52px);
  border: 1px solid rgba(180, 71, 42, 0.42);
  border-radius: var(--r);
  background-image: linear-gradient(128deg, var(--about-clay-soft), transparent 58%);
  background-color: var(--stand);
}

.page-about .yunnan-contour {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.34;
  pointer-events: none;
}

.page-about .yunnan-contour path {
  fill: none;
  stroke: var(--clay);
  stroke-width: 1;
  opacity: 0.6;
}

.page-about .yunnan-copy {
  position: relative;
  z-index: 1;
}

.page-about .yunnan-copy p {
  max-width: 62ch;
  margin: 16px 0 0;
  font-size: clamp(15px, 1.8vw, 17px);
  line-height: 1.84;
}

.page-about .yunnan-copy .side-note {
  margin-top: 20px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate);
}

/* ---------- 05 更新节奏 ---------- */
.page-about .rhythm-list {
  border-top: 1px solid var(--about-rule);
}

.page-about .rhythm-list .disclosure {
  border-bottom: 1px solid var(--about-rule);
}

.page-about .disclosure-trigger {
  display: flex;
  gap: 14px;
  align-items: center;
  width: 100%;
  padding: clamp(16px, 2.2vw, 22px) 0;
  background: none;
  border: 0;
  color: var(--mist);
  font-family: var(--font-display);
  font-size: clamp(16px, 2.1vw, 19px);
  font-weight: 700;
  text-align: left;
  cursor: pointer;
  transition: color var(--dur) var(--ease);
}

.page-about .disclosure-trigger:hover {
  color: var(--lime);
}

.page-about .disclosure-trigger:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
  border-radius: var(--r-sm);
}

.page-about .disclosure-trigger .mono {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .disclosure-panel {
  padding: 0 0 clamp(18px, 2.4vw, 26px);
}

.page-about .disclosure-panel p {
  max-width: 66ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.84;
  color: var(--slate);
}

/* ---------- 06 协作 ---------- */
.page-about .collab-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3vw, 40px);
  padding-top: clamp(28px, 4vw, 52px);
  border-top: 1px solid var(--about-rule);
}

.page-about .collab-copy p {
  max-width: 60ch;
  margin: 16px 0 0;
  font-size: clamp(15px, 1.8vw, 17px);
  line-height: 1.84;
}

.page-about .collab-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .collab-note {
  margin: 0;
  padding: 16px 18px;
  border-left: 2px solid var(--orange);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background: var(--glass);
  font-size: 14px;
  line-height: 1.78;
  color: var(--slate);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .masthead-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-about .team-row {
    display: grid;
    grid-template-columns: 118px minmax(0, 1fr) auto;
    gap: 0 24px;
    align-items: center;
  }

  .page-about .team-num {
    margin-bottom: 0;
  }

  .page-about .team-tag {
    margin-top: 0;
    justify-self: end;
  }

  .page-about .collab-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
  }
}

@media (min-width: 900px) {
  .page-about .masthead-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(30px, 4vw, 64px);
  }

  .page-about .statement-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
}

@media (min-width: 960px) {
  .page-about .coach-grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
  }
}

@media (min-width: 1080px) {
  .page-about .masthead-rot {
    display: block;
    position: absolute;
    top: clamp(74px, 11vw, 142px);
    right: 10px;
    writing-mode: vertical-rl;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.34em;
    color: var(--slate);
    opacity: 0.66;
    pointer-events: none;
    user-select: none;
  }
}

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