/* ===== 品牌历程 · 赛季纪年长卷 ===== */
.page-about {
  --about-gap: clamp(18px, 3vw, 30px);
  --about-orange-soft: rgba(255, 90, 31, 0.14);
  --about-blue-soft: rgba(61, 139, 255, 0.16);
  background-color: var(--c-black);
  color: var(--c-cream);
  padding-bottom: clamp(56px, 9vw, 110px);
  overflow-x: clip;
}

/* ---- 首屏 ---- */
.page-about .about-hero {
  position: relative;
  min-height: clamp(420px, 62vh, 620px);
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  border-bottom: 1px solid var(--line-gold);
}

.page-about .about-hero__img {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.06);
}

.page-about .about-hero__veil {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(100deg, rgba(14, 15, 18, 0.28) 0%, rgba(14, 15, 18, 0.72) 44%, rgba(14, 15, 18, 0.96) 76%, var(--c-black) 100%),
    linear-gradient(to top, var(--c-black) 3%, rgba(14, 15, 18, 0) 42%);
}

.page-about .about-hero__copy {
  position: relative;
  z-index: 2;
  width: 100%;
  padding-block: clamp(72px, 16vw, 200px) clamp(34px, 7vw, 70px);
}

.page-about .breadcrumb {
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--c-ash);
  margin-bottom: 18px;
}

.page-about .breadcrumb a {
  color: var(--c-gold);
  text-decoration: none;
}

.page-about .breadcrumb a:hover {
  color: var(--c-lava-2);
}

.page-about .about-hero .eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--c-lava);
  margin: 0 0 14px;
}

.page-about .about-hero .display-xl {
  font-size: clamp(1.9rem, 6.4vw, 4.2rem);
  font-weight: 900;
  letter-spacing: 0.06em;
  line-height: 1.24;
  margin: 0 0 18px;
  max-width: 17ch;
  color: var(--c-cream);
}

.page-about .about-hero .lede {
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: rgba(242, 233, 220, 0.8);
  max-width: 50ch;
  margin: 0;
}

/* ---- 长卷骨架 ---- */
.page-about .about-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  padding-top: clamp(36px, 7vw, 80px);
}

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

.page-about .toc {
  background-color: var(--c-deep);
  border: 1px solid var(--line-gold);
  border-radius: 4px;
  padding: 14px 12px;
}

.page-about .toc__title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--c-gold);
  margin: 0 0 10px;
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  white-space: nowrap;
  padding: 7px 11px;
  border: 1px solid transparent;
  border-radius: 3px;
  font-size: 14px;
  color: var(--c-ash);
  text-decoration: none;
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

.page-about .about-rail__link:hover {
  color: var(--c-cream);
  border-color: var(--line-gold);
}

.page-about .about-rail__link[aria-current="true"] {
  color: var(--c-cream);
  background-color: var(--about-orange-soft);
  border-color: var(--line-gold);
}

.page-about .about-rail__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--c-gold);
}

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

/* ---- 章节 ---- */
.page-about .about-chapter {
  padding-block: clamp(34px, 6vw, 62px);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-flow > .about-chapter:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-chapter__head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: clamp(16px, 3vw, 26px);
}

.page-about .about-chapter__no {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.8vw, 32px);
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--c-lava);
}

.page-about .about-chapter__title {
  font-size: clamp(1.32rem, 3.4vw, 2.05rem);
  font-weight: 900;
  letter-spacing: 0.05em;
  margin: 0;
  color: var(--c-cream);
}

.page-about .about-chapter__head::after {
  content: "";
  flex: 1 1 60px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--c-lava), rgba(255, 90, 31, 0));
}

.page-about .about-flow p {
  font-size: 16px;
  line-height: 1.78;
  color: rgba(242, 233, 220, 0.82);
  margin: 0 0 14px;
  max-width: 66ch;
}

/* ---- 赛季时间线 ---- */
.page-about .season-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0 0 0 30px;
  position: relative;
}

.page-about .season-list::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 8px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(180deg, var(--c-gold), var(--c-lava) 55%, rgba(255, 90, 31, 0.06));
}

.page-about .season-item {
  position: relative;
  padding-bottom: clamp(24px, 4vw, 38px);
}

.page-about .season-item:last-child {
  padding-bottom: 0;
}

.page-about .season-item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--c-black);
  border: 2px solid var(--c-lava);
  box-shadow: 0 0 0 4px rgba(255, 90, 31, 0.12);
}

.page-about .season-item__era {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--c-gold);
  border: 1px solid var(--line-gold);
  border-radius: 3px;
  padding: 3px 8px;
  margin-bottom: 10px;
}

.page-about .season-item__title {
  font-size: clamp(1.05rem, 2.4vw, 1.3rem);
  font-weight: 900;
  letter-spacing: 0.04em;
  line-height: 1.5;
  margin: 0 0 8px;
  color: var(--c-cream);
}

/* ---- 团队 ---- */
.page-about .crew-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: 24px;
}

.page-about .crew-card {
  background-color: var(--c-deep);
  border: 1px solid var(--line-gold);
  border-radius: 4px;
  padding: 20px 18px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}

.page-about .crew-card__num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 5vw, 38px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--c-lava);
  margin: 0 0 12px;
}

.page-about .crew-card__title {
  font-size: 1.05rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  color: var(--c-cream);
  margin: 0 0 8px;
}

.page-about .crew-card p {
  font-size: 15px;
  line-height: 1.72;
  color: var(--c-ash);
  max-width: none;
  margin: 0;
}

.page-about .crew-card .crew-card__num {
  color: var(--c-lava);
}

/* ---- 配图 ---- */
.page-about .about-figure {
  margin: clamp(22px, 4vw, 36px) 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 4px;
  border: 1px solid var(--line-gold);
}

.page-about .about-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--c-ash);
}

/* ---- 服务区域 ---- */
.page-about .coverage {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  margin-top: 24px;
}

.page-about .coverage__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .coverage__item {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 6px 16px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .coverage__item:first-child {
  border-top: 1px solid var(--line-soft);
}

.page-about .coverage__val {
  font-family: var(--font-mono);
  font-size: clamp(22px, 4vw, 30px);
  line-height: 1.1;
  letter-spacing: 0.02em;
  color: var(--c-blue);
  min-width: 3.6em;
}

.page-about .coverage__unit {
  font-size: 0.5em;
  letter-spacing: 0.08em;
  color: var(--c-ash);
  margin-left: 3px;
}

.page-about .coverage__label {
  font-size: 15px;
  line-height: 1.6;
  color: rgba(242, 233, 220, 0.82);
  flex: 1 1 12ch;
}

.page-about .coverage__note p {
  font-size: 15px;
  line-height: 1.78;
  color: rgba(242, 233, 220, 0.74);
  border-left: 2px solid var(--about-blue-soft);
  padding-left: 14px;
  max-width: 60ch;
}

/* ---- 合作生态 ---- */
.page-about .partner-list {
  list-style: none;
  margin: 24px 0 20px;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .partner-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 18px 18px 18px 16px;
  background-color: var(--c-deep);
  border-left: 2px solid var(--c-lava);
  border-radius: 0 4px 4px 0;
}

.page-about .partner-item__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 4vw, 32px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--c-gold);
  flex: 0 0 auto;
}

.page-about .partner-item__unit {
  font-size: 0.55em;
  vertical-align: super;
}

.page-about .partner-item__body {
  min-width: 0;
}

.page-about .partner-item__title {
  font-size: 1rem;
  font-weight: 900;
  letter-spacing: 0.06em;
  color: var(--c-cream);
  margin: 0 0 6px;
}

.page-about .partner-item__body p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--c-ash);
  max-width: none;
  margin: 0;
}

/* ---- 白皮书（暖纸章） ---- */
.page-about .about-chapter--paper {
  background-color: var(--c-paper);
  color: var(--c-paper-ink);
  border-top: 0;
  border-radius: 4px;
  padding: clamp(26px, 5vw, 46px) clamp(20px, 4vw, 44px);
}

.page-about .about-chapter--paper .about-chapter__no {
  color: var(--c-red);
}

.page-about .about-chapter--paper .about-chapter__title {
  color: var(--c-paper-ink);
}

.page-about .about-chapter--paper .about-chapter__head::after {
  background: linear-gradient(90deg, var(--c-red), rgba(179, 48, 26, 0));
}

.page-about .about-chapter--paper p {
  color: rgba(26, 28, 34, 0.82);
}

.page-about .wp-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 20px 0 22px;
}

.page-about .wp-stat {
  border-top: 2px solid var(--c-paper-ink);
  padding-top: 10px;
}

.page-about .wp-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(30px, 6vw, 46px);
  line-height: 1;
  color: var(--c-red);
  letter-spacing: 0.02em;
}

.page-about .wp-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  letter-spacing: 0.16em;
  color: rgba(26, 28, 34, 0.66);
}

/* ---- 收束 ---- */
.page-about .about-outro {
  margin-top: clamp(40px, 7vw, 78px);
  border-top: 1px solid var(--line-gold);
  padding-top: clamp(26px, 5vw, 46px);
}

.page-about .about-outro__curve {
  display: block;
  width: 100%;
  height: clamp(90px, 14vw, 150px);
  margin-bottom: clamp(20px, 4vw, 32px);
}

.page-about .about-outro__base {
  fill: none;
  stroke: var(--c-blue);
  stroke-width: 2;
  stroke-dasharray: 6 8;
  opacity: 0.75;
}

.page-about .about-outro__spark {
  fill: none;
  stroke: var(--c-lava);
  stroke-width: 3;
  stroke-linejoin: round;
  stroke-linecap: round;
}

.page-about .about-outro__node {
  fill: var(--c-moss);
  stroke: var(--c-black);
  stroke-width: 2;
}

.page-about .about-outro h2 {
  font-size: clamp(1.5rem, 4vw, 2.4rem);
  font-weight: 900;
  letter-spacing: 0.06em;
  color: var(--c-cream);
  margin: 0 0 14px;
}

.page-about .about-outro__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

/* ---- 窄屏保护 ---- */
@media (max-width: 480px) {
  .page-about .about-outro__links .btn {
    flex: 1 1 100%;
    text-align: center;
  }

  .page-about .coverage__val {
    min-width: auto;
  }
}

/* ---- 平板：团队双列 + 时间线错位 ---- */
@media (min-width: 700px) {
  .page-about .crew-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .partner-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .partner-item:first-child {
    grid-column: 1 / -1;
  }

  .page-about .season-item:nth-child(even) {
    margin-left: clamp(0px, 5vw, 52px);
  }
}

/* ---- 桌面：左侧固定目录 + 非对称正文 ---- */
@media (min-width: 980px) {
  .page-about .about-shell {
    grid-template-columns: 196px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 60px);
    align-items: start;
  }

  .page-about .toc {
    position: sticky;
    top: calc(var(--header-h) + 22px);
    padding: 18px 14px;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    overflow: visible;
  }

  .page-about .about-rail__link {
    width: 100%;
    padding: 8px 10px;
  }

  .page-about .coverage {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: clamp(20px, 3vw, 40px);
  }

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

  .page-about .about-chapter {
    padding-block: clamp(42px, 5vw, 70px);
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero .display-xl {
    max-width: 15ch;
  }
}