.page-about {
  --about-edge: rgba(201, 204, 209, 0.14);
  --about-faint: rgba(201, 204, 209, 0.07);
  --about-ink-on-paper: #141518;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs {
  padding-top: clamp(16px, 3vw, 30px);
  padding-bottom: clamp(10px, 2vw, 18px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-bottom: clamp(34px, 6vw, 72px);
}

.page-about .about-hero__in {
  display: grid;
  gap: clamp(24px, 4vw, 46px);
}

.page-about .about-hero__title {
  margin: 14px 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 8.2vw, 58px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--white);
  text-wrap: balance;
}

.page-about .about-hero__lead {
  margin: 0 0 24px;
  color: var(--silver);
  font-size: clamp(15px, 1.6vw, 17px);
}

.page-about .about-hero__kpi {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 30px;
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
}

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

.page-about .about-hero__num {
  font-family: var(--font-mono);
  font-size: clamp(20px, 3.6vw, 30px);
  font-weight: 700;
  line-height: 1;
  color: var(--orange);
}

.page-about .about-hero__key {
  font-size: 13px;
  color: var(--stat);
}

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

.page-about .about-hero__media {
  margin: 0;
  border-left: 3px solid var(--red);
}

/* ---------- 通用小节头 ---------- */
.page-about .about-head {
  margin-bottom: clamp(22px, 4vw, 40px);
  max-width: 720px;
}

.page-about .about-head h2 {
  margin: 8px 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(25px, 4.4vw, 40px);
  line-height: 1.14;
  letter-spacing: -0.015em;
  color: var(--white);
}

.page-about .about-head__sub {
  margin: 0;
  color: var(--stat);
  font-size: clamp(14px, 1.5vw, 16px);
  line-height: 1.75;
}

/* ---------- 四种时间 ---------- */
.page-about .about-times__grid {
  gap: clamp(14px, 2vw, 20px);
}

.page-about .about-time {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(18px, 3vw, 28px);
  background: var(--locker);
  border-radius: var(--radius);
  border-left: 3px solid var(--board);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-time:nth-child(2) {
  background: var(--glass);
  border-left-color: var(--orange);
}

.page-about .about-time:hover {
  border-left-color: var(--red);
  transform: translateY(-2px);
}

.page-about .about-time__no {
  color: var(--stat);
}

.page-about .about-time__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(18px, 2.4vw, 23px);
  line-height: 1.25;
  color: var(--white);
}

.page-about .about-time__text {
  margin: 0;
  color: var(--silver);
  font-size: 15px;
  line-height: 1.75;
}

.page-about .about-time__meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: auto 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--about-edge);
  color: var(--stat);
}

/* ---------- 空间平面 ---------- */
.page-about .about-plan__board {
  padding: clamp(16px, 3vw, 30px);
  background: var(--locker);
  border: 1px solid var(--about-edge);
  border-radius: var(--radius);
}

.page-about .about-plan__svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .pl-frame {
  fill: none;
  stroke: var(--board);
  stroke-width: 1.5;
  stroke-dasharray: 6 6;
}

.page-about .pl-corridor {
  fill: var(--stat);
  font-family: var(--font-body);
  font-size: 15px;
}

.page-about .pl-corridor--sub {
  font-family: var(--font-mono);
  font-size: 12px;
  fill: var(--board);
}

.page-about .pl-zone {
  cursor: default;
  outline: none;
}

.page-about .pl-zone rect {
  fill: var(--about-faint);
  stroke: var(--board);
  stroke-width: 1.5;
  transition: fill var(--dur) var(--ease), stroke var(--dur) var(--ease);
}

.page-about .pl-zone .pl-label {
  fill: var(--white);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
}

.page-about .pl-zone .pl-sub {
  fill: var(--stat);
  font-family: var(--font-mono);
  font-size: 12px;
}

.page-about .pl-zone--watch:hover rect,
.page-about .pl-zone--watch:focus rect {
  fill: rgba(214, 41, 58, 0.3);
  stroke: var(--red-bright);
}

.page-about .pl-zone--court:hover rect,
.page-about .pl-zone--court:focus rect {
  fill: rgba(240, 112, 30, 0.28);
  stroke: var(--orange);
}

.page-about .pl-zone--rooms:hover rect,
.page-about .pl-zone--rooms:focus rect {
  fill: rgba(201, 204, 209, 0.2);
  stroke: var(--silver);
}

.page-about .pl-zone--fans:hover rect,
.page-about .pl-zone--fans:focus rect {
  fill: rgba(22, 53, 44, 0.75);
  stroke: var(--paper);
}

.page-about .about-plan__legend {
  display: grid;
  gap: 10px;
  margin: clamp(18px, 3vw, 28px) 0 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
  color: var(--silver);
}

.page-about .about-plan__legend li {
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-about .about-plan__chip {
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  border-radius: 3px;
}

.page-about .about-plan__chip--watch { background: var(--red); }
.page-about .about-plan__chip--court { background: var(--orange); }
.page-about .about-plan__chip--rooms { background: var(--silver); }
.page-about .about-plan__chip--fans { background: var(--green); border: 1px solid var(--paper); }

.page-about .about-plan__fig {
  margin: clamp(20px, 3vw, 34px) 0 0;
}

/* ---------- 赛季年轮 ---------- */
.page-about .about-seasons__list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--about-edge);
}

.page-about .season {
  border-bottom: 1px solid var(--about-edge);
}

.page-about .season__sum {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: clamp(15px, 2.6vw, 22px) 0;
  padding-left: 14px;
  border-left: 2px solid transparent;
  cursor: pointer;
  list-style: none;
  transition: border-color var(--dur) var(--ease);
}

.page-about .season__sum::-webkit-details-marker { display: none; }

.page-about .season[open] > .season__sum {
  border-left-color: var(--red);
}

.page-about .season__sum::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--red-bright);
  transition: transform var(--dur) var(--ease);
}

.page-about .season[open] .season__sum::after {
  content: "–";
}

.page-about .season__no {
  color: var(--orange);
  font-size: 13px;
  white-space: nowrap;
}

.page-about .season__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(16px, 2.2vw, 21px);
  color: var(--white);
}

.page-about .season__body {
  padding: 0 0 clamp(16px, 3vw, 26px) 14px;
  border-left: 2px solid var(--about-edge);
}

.page-about .season__body p {
  max-width: 64ch;
  margin: 0 0 10px;
  color: var(--silver);
  font-size: 15px;
  line-height: 1.75;
}

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

/* ---------- 会员等级 ---------- */
.page-about .about-tiers__list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .tier {
  display: grid;
  gap: 10px;
  padding: clamp(15px, 2.6vw, 22px);
  background: var(--locker);
  border: 1px solid var(--about-edge);
  border-radius: var(--radius);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .tier:hover {
  border-color: var(--red);
  background: var(--ink-soft);
}

.page-about .tier__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.page-about .tier__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(17px, 2.2vw, 21px);
  color: var(--white);
}

.page-about .tier__idx { color: var(--stat); }

.page-about .tier__track {
  height: 10px;
  background: var(--about-faint);
  border-radius: 999px;
  overflow: hidden;
}

.page-about .tier__bar {
  display: block;
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--orange), var(--red));
  transition: filter var(--dur) var(--ease);
}

.page-about .tier--1 .tier__bar { width: 26%; }
.page-about .tier--2 .tier__bar { width: 52%; }
.page-about .tier--3 .tier__bar { width: 76%; }
.page-about .tier--4 .tier__bar { width: 100%; }

.page-about .tier:hover .tier__bar { filter: brightness(1.25); }

.page-about .tier__note {
  margin: 0;
  color: var(--silver);
  font-size: 14px;
  line-height: 1.7;
}

.page-about .about-tiers__foot {
  margin: clamp(18px, 3vw, 28px) 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--orange);
  color: var(--stat);
  font-size: 14px;
  line-height: 1.75;
  max-width: 68ch;
}

/* ---------- 团队与伙伴 ---------- */
.page-about .about-team__grid {
  gap: clamp(24px, 4vw, 44px);
}

.page-about .about-team__text h2 {
  margin: 8px 0 16px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 4.2vw, 38px);
  line-height: 1.16;
  letter-spacing: -0.015em;
  color: var(--white);
}

.page-about .about-team__text p {
  color: var(--silver);
  font-size: 15px;
  line-height: 1.78;
  margin: 0 0 14px;
}

.page-about .about-team__link { margin-top: 22px; }

.page-about .about-team__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 1px;
  list-style: none;
  background: var(--about-edge);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-team__stats li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: clamp(16px, 2.6vw, 24px);
  background: var(--locker);
}

.page-about .about-team__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 4vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: var(--orange);
}

.page-about .about-team__plus {
  font-size: 0.6em;
  color: var(--red-bright);
}

.page-about .about-team__lbl {
  font-size: 13px;
  line-height: 1.6;
  color: var(--stat);
}

/* ---------- 三条原则 ---------- */
.page-about .about-rules__slab {
  position: relative;
  padding: clamp(24px, 5vw, 56px);
  background: var(--green);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-rules__slab::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(135deg, rgba(232, 223, 200, 0.06) 0 2px, transparent 2px 9px);
  pointer-events: none;
}

.page-about .about-rules__eyebrow {
  position: relative;
  color: var(--paper);
  opacity: 0.72;
}

.page-about .about-rules__slab h2 {
  position: relative;
  margin: 8px 0 clamp(20px, 3.4vw, 34px);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 4.4vw, 40px);
  line-height: 1.14;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-about .about-rules__grid {
  position: relative;
  display: grid;
  gap: 14px;
}

.page-about .rule {
  padding: clamp(18px, 3vw, 26px);
  border-radius: var(--radius);
}

.page-about .rule__no {
  margin: 0 0 10px;
  color: #6B5F41;
}

.page-about .rule__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(17px, 2.2vw, 20px);
  line-height: 1.3;
  color: var(--about-ink-on-paper);
}

.page-about .rule__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: #3B3628;
}

/* ---------- 结尾 ---------- */
.page-about .about-outro__in {
  display: grid;
  gap: clamp(22px, 4vw, 44px);
  padding-top: clamp(20px, 4vw, 36px);
  border-top: 1px solid var(--about-edge);
}

.page-about .about-outro__text h2 {
  margin: 8px 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 4vw, 36px);
  line-height: 1.16;
  letter-spacing: -0.015em;
  color: var(--white);
}

.page-about .about-outro__text p {
  margin: 0;
  color: var(--silver);
  font-size: 15px;
  line-height: 1.78;
}

.page-about .about-outro__cta {
  display: grid;
  gap: 12px;
  align-content: start;
}

/* ---------- 断点 ---------- */
@media (min-width: 700px) {
  .page-about .about-plan__legend {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px 26px;
  }

  .page-about .tier {
    grid-template-columns: 150px minmax(0, 1fr);
    align-items: center;
    gap: 8px 22px;
  }

  .page-about .tier__head {
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 4px;
  }

  .page-about .tier__track { margin-top: -18px; }

  .page-about .tier__note {
    grid-column: 2;
    margin-top: 4px;
  }

  .page-about .about-rules__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .rule:nth-child(1) { transform: rotate(-0.6deg); }
  .page-about .rule:nth-child(3) { transform: rotate(0.5deg); }
}

@media (min-width: 900px) {
  .page-about .about-hero__in {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
    gap: clamp(34px, 5vw, 64px);
  }

  .page-about .about-hero__title {
    transform: skewX(-6deg);
    transform-origin: left bottom;
    font-size: clamp(40px, 5vw, 58px);
  }

  .page-about .about-hero__body {
    padding-right: 8px;
  }

  .page-about .about-hero__media {
    margin-top: -34px;
  }

  .page-about .about-outro__in {
    grid-template-columns: minmax(0, 1fr) 300px;
    align-items: start;
  }

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

  .page-about .season__sum {
    padding-left: 20px;
    gap: 22px;
  }

  .page-about .season__body {
    padding-left: 20px;
    padding-right: clamp(0px, 6vw, 90px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-time,
  .page-about .tier,
  .page-about .tier__bar,
  .page-about .season__sum,
  .page-about .pl-zone rect {
    transition: none;
  }

  .page-about .about-time:hover {
    transform: none;
  }

  .page-about .rule:nth-child(1),
  .page-about .rule:nth-child(3) {
    transform: none;
  }
}