.page-about {
  --about-measure: 40em;
  --about-glow: radial-gradient(circle at 82% 8%, rgba(255, 106, 31, 0.20), transparent 58%);
  --about-tint: linear-gradient(180deg, rgba(14, 23, 48, 0), rgba(14, 23, 48, 0.9) 14%, rgba(14, 23, 48, 0.9) 86%, rgba(14, 23, 48, 0));
  color: var(--text);
}

.page-about .breadcrumb {
  padding-top: clamp(18px, 3vw, 30px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(40px, 6vw, 72px) clamp(56px, 8vw, 104px);
  background-image: var(--about-glow);
  background-repeat: no-repeat;
  overflow: hidden;
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(34px, 5vw, 60px);
  align-items: center;
}

.page-about .about-hero h1 {
  margin: 16px 0 0;
  font-size: clamp(34px, 5.6vw, 58px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  font-weight: 800;
  max-width: 14em;
}

.page-about .about-hero h1 em {
  font-style: normal;
  color: var(--orange);
}

.page-about .about-hero__lede {
  margin: 22px 0 0;
  max-width: var(--about-measure);
  font-size: clamp(16px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--text);
}

.page-about .about-hero__lede--soft {
  margin-top: 12px;
  color: var(--muted);
  font-size: 16px;
}

.page-about .about-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(20px, 4vw, 52px);
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.page-about .about-hero__stat {
  min-width: 92px;
}

.page-about .about-hero__label {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
  margin-bottom: 8px;
}

.page-about .about-hero__stat .stat-num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 3.6vw, 38px);
  font-weight: 700;
  line-height: 1.05;
  color: var(--text);
}

.page-about .about-hero__stat .stat-num span {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 400;
  color: var(--muted);
  margin-left: 5px;
}

.page-about .about-hero__media {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-panel);
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* ---------- 章节通用骨架 ---------- */
.page-about .about-chapter {
  padding-block: clamp(60px, 8vw, 108px);
}

.page-about .about-chapter--tint {
  background-image: var(--about-tint);
}

.page-about .about-chapter__head {
  margin-bottom: clamp(32px, 4.5vw, 56px);
}

.page-about .about-chapter__num {
  display: block;
  font-size: clamp(13px, 1.4vw, 15px);
  letter-spacing: 0.3em;
  color: var(--orange);
  margin-bottom: 14px;
}

.page-about .about-chapter__intro h2 {
  margin: 0;
  font-size: clamp(26px, 3.8vw, 42px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  font-weight: 800;
  max-width: 18em;
}

.page-about .about-chapter__intro p {
  margin: 18px 0 0;
  max-width: var(--about-measure);
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
}

@media (min-width: 760px) {
  .page-about .about-chapter__head {
    display: grid;
    grid-template-columns: 90px minmax(0, 1fr);
    gap: 28px;
    align-items: start;
  }

  .page-about .about-chapter__num {
    margin-bottom: 0;
    padding-top: 10px;
  }
}

/* ---------- 赛季分段 ---------- */
.page-about .about-seasons {
  display: grid;
  gap: clamp(22px, 3.5vw, 44px);
  align-items: start;
}

.page-about .about-seasons .tablist {
  display: flex;
  flex-direction: column;
  gap: 2px;
  border-left: 1px solid var(--line);
}

.page-about .about-seasons__tab {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-left: -1px;
  padding: 14px 18px;
  background: none;
  border: 0;
  border-left: 2px solid transparent;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--muted);
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: color 0.25s ease, background 0.25s ease, border-color 0.25s ease;
}

.page-about .about-seasons__tab:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.03);
}

.page-about .about-seasons__tab[aria-selected="true"] {
  color: var(--text);
  border-left-color: var(--orange);
  background: linear-gradient(90deg, rgba(255, 106, 31, 0.18), rgba(255, 106, 31, 0));
}

.page-about .about-seasons__tab:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 2px;
}

.page-about .about-seasons__idx {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-about .about-seasons__name {
  font-size: 14px;
  color: inherit;
}

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

.page-about .about-seasons__panel {
  padding: clamp(24px, 3vw, 38px);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}

.page-about .about-seasons__panel h3 {
  margin: 0;
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-about .about-seasons__panel > p {
  margin: 16px 0 0;
  max-width: var(--about-measure);
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .about-seasons__panel .bullets {
  margin-top: 20px;
}

/* ---------- 团队分工 ---------- */
.page-about .about-flow {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  margin-bottom: clamp(34px, 4.5vw, 54px);
}

.page-about .about-flow__link {
  stroke: var(--line);
  stroke-width: 2;
  stroke-dasharray: 4 6;
}

.page-about .about-flow__node rect {
  fill: var(--panel);
  stroke: var(--line);
  stroke-width: 1.5;
}

.page-about .about-flow__node text {
  fill: var(--text);
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 600;
  text-anchor: middle;
  dominant-baseline: central;
}

@media (prefers-reduced-motion: no-preference) {
  .page-about .about-flow__node rect {
    animation: aboutFlowPulse 7.2s ease-in-out infinite;
  }

  .page-about .about-flow__node--2 rect {
    animation-delay: 1.8s;
  }

  .page-about .about-flow__node--3 rect {
    animation-delay: 3.6s;
  }

  .page-about .about-flow__node--4 rect {
    animation-delay: 5.4s;
  }
}

@keyframes aboutFlowPulse {
  0%, 22%, 100% {
    fill: var(--panel);
    stroke: var(--line);
  }
  8% {
    fill: var(--panel-up);
    stroke: var(--orange);
  }
}

.page-about .about-roles {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 2.6vw, 28px);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-role {
  padding: 24px 22px 26px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 2px solid transparent;
  border-radius: var(--radius-md);
  transition: transform 0.3s ease, border-color 0.3s ease, background 0.3s ease;
}

.page-about .about-role:hover {
  transform: translateY(-4px);
  border-top-color: var(--orange);
  background: var(--panel-up);
}

.page-about .about-role__num {
  display: block;
  font-size: 26px;
  font-weight: 700;
  color: var(--green);
  letter-spacing: 0.04em;
}

.page-about .about-role h3 {
  margin: 14px 0 0;
  font-size: 18px;
  font-weight: 700;
}

.page-about .about-role p {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

@media (min-width: 700px) {
  .page-about .about-roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1060px) {
  .page-about .about-roles {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 内容流程 ---------- */
.page-about .about-process {
  display: grid;
  gap: clamp(34px, 5vw, 62px);
  align-items: start;
}

.page-about .about-chapter__head--stacked {
  margin-bottom: clamp(26px, 3.5vw, 40px);
}

.page-about .about-steps {
  position: relative;
  margin: 0;
  padding: 0 0 0 4px;
  list-style: none;
  display: grid;
  gap: clamp(22px, 3vw, 34px);
}

.page-about .about-steps::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--orange), var(--line) 42%, var(--line));
}

.page-about .about-step {
  position: relative;
  padding-left: 52px;
}

.page-about .about-step__num {
  position: absolute;
  left: 0;
  top: 2px;
  width: 28px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--orange);
  background: var(--bg);
  padding-block: 3px;
  text-align: center;
  transition: color 0.25s ease;
}

.page-about .about-step:hover .about-step__num {
  color: var(--green);
}

.page-about .about-step h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
}

.page-about .about-step p {
  margin: 8px 0 0;
  max-width: var(--about-measure);
  font-size: 15px;
  line-height: 1.76;
  color: var(--muted);
}

.page-about .about-process__media {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-about .about-process__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-process__media figcaption {
  padding: 16px 20px 18px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

@media (min-width: 960px) {
  .page-about .about-process {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
}

/* ---------- 更新节奏 ---------- */
.page-about .about-rhythm {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 2.4vw, 26px);
}

.page-about .about-rhythm__slot {
  padding: clamp(22px, 2.6vw, 30px);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}

.page-about .about-rhythm__time {
  margin: 0;
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--orange);
}

.page-about .about-rhythm__slot h3 {
  margin: 14px 0 0;
  font-size: 17px;
  font-weight: 700;
}

.page-about .about-rhythm__slot p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.76;
  color: var(--muted);
}

.page-about .about-rhythm__media {
  margin: clamp(30px, 4vw, 48px) 0 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-panel);
}

.page-about .about-rhythm__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-about .about-rhythm__note {
  margin: clamp(20px, 2.6vw, 28px) 0 0;
  max-width: var(--about-measure);
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

@media (min-width: 780px) {
  .page-about .about-rhythm {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 三条主张 ---------- */
.page-about .about-pledge {
  margin-inline: auto;
}

.page-about .about-pledges {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: clamp(26px, 3.4vw, 38px);
}

.page-about .about-pledge__item {
  padding-left: 60px;
  position: relative;
  border-top: 1px solid var(--line);
  padding-top: 22px;
}

.page-about .about-pledge__num {
  position: absolute;
  left: 0;
  top: 22px;
  font-size: 22px;
  font-weight: 700;
  color: var(--orange-soft);
  letter-spacing: 0.03em;
}

.page-about .about-pledge__item h3 {
  margin: 0;
  font-size: clamp(19px, 2.2vw, 24px);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-about .about-pledge__item p {
  margin: 10px 0 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .about-quote {
  margin: clamp(38px, 5vw, 56px) 0 0;
  padding: 22px 24px 24px;
  border-left: 3px solid var(--green);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: rgba(53, 224, 138, 0.06);
}

.page-about .about-quote p {
  margin: 0;
  font-size: clamp(20px, 2.6vw, 28px);
  line-height: 1.5;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
}

/* ---------- 结尾引导 ---------- */
.page-about .about-next {
  padding-block: clamp(56px, 8vw, 100px);
  background-image: linear-gradient(180deg, rgba(22, 34, 74, 0) 0%, rgba(22, 34, 74, 0.55) 100%);
  border-top: 1px solid var(--line);
}

.page-about .about-next__inner {
  max-width: 860px;
}

.page-about .about-next h2 {
  margin: 16px 0 0;
  font-size: clamp(26px, 3.6vw, 40px);
  line-height: 1.18;
  letter-spacing: -0.02em;
  font-weight: 800;
}

.page-about .about-next__text {
  margin: 18px 0 0;
  max-width: var(--about-measure);
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: clamp(24px, 3vw, 34px);
}

@media (max-width: 560px) {
  .page-about .about-next__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .page-about .about-next__actions .btn {
    text-align: center;
  }

  .page-about .about-pledge__item {
    padding-left: 0;
  }

  .page-about .about-pledge__num {
    position: static;
    display: block;
    margin-bottom: 10px;
    top: auto;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
}

@media (min-width: 880px) {
  .page-about .about-seasons {
    grid-template-columns: 250px minmax(0, 1fr);
  }
}