/* ============================================================
   BSPORT看台 · 看台缘起（/story/）
   页面专属样式，全部限定在 .page-about 作用域内
   ============================================================ */

.page-about {
  --about-glow: rgba(61, 214, 245, 0.16);
  --about-ribbon: linear-gradient(180deg, var(--volt), var(--blue), var(--amber), var(--red));
  display: block;
}

/* ---------------- 首屏：夜场看台海报 ---------------- */

.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background-color: var(--night);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero__media {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.page-about .about-hero__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 42%;
  opacity: 0.48;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(115% 85% at 80% 10%, var(--about-glow), transparent 62%),
    linear-gradient(180deg, rgba(11, 43, 38, 0.46) 0%, rgba(11, 43, 38, 0.86) 60%, var(--night) 100%);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  padding-top: clamp(44px, 9vw, 104px);
  padding-bottom: clamp(52px, 9vw, 112px);
}

.page-about .about-hero h1 {
  margin: 18px 0 22px;
  max-width: 15em;
  font-size: clamp(36px, 8.4vw, 76px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.012em;
  color: var(--white);
  text-wrap: balance;
}

.page-about .about-hero__hl {
  color: var(--volt);
  box-shadow: inset 0 -0.14em 0 rgba(215, 255, 63, 0.2);
}

.page-about .about-hero__lede {
  max-width: 46em;
  margin: 0;
  color: rgba(244, 255, 248, 0.82);
  font-size: clamp(16px, 2.1vw, 19px);
  line-height: 1.78;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: clamp(26px, 4vw, 38px) 0 0;
}

.page-about .about-hero__side {
  display: none;
}

@media (min-width: 1280px) {
  .page-about .about-hero__side {
    display: block;
    position: absolute;
    right: 20px;
    bottom: 74px;
    z-index: 2;
    margin: 0;
    writing-mode: vertical-rl;
    font-size: 11px;
    letter-spacing: 0.4em;
    text-transform: uppercase;
    color: var(--volt);
    opacity: 0.7;
    pointer-events: none;
  }
}

/* ---------------- 正文骨架 ---------------- */

.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 6vw, 56px);
  padding-top: clamp(46px, 8vw, 100px);
  padding-bottom: clamp(56px, 9vw, 118px);
}

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

@media (min-width: 1024px) {
  .page-about .about-layout {
    grid-template-columns: 212px minmax(0, 1fr);
    gap: clamp(40px, 5.5vw, 84px);
  }
}

/* ---------------- 章节目录 ---------------- */

.page-about .about-toc {
  display: none;
}

@media (min-width: 1024px) {
  .page-about .about-toc {
    display: block;
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
  }
}

.page-about .about-toc__label {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--muted);
}

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

.page-about .about-toc__link {
  display: block;
  padding: 9px 0 9px 14px;
  border-left: 2px solid var(--line);
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
  text-decoration: none;
  transition: color var(--t), border-color var(--t), padding-left var(--t);
}

.page-about .about-toc__link:hover {
  color: var(--white);
  border-left-color: var(--line-strong);
}

.page-about .about-toc__link[aria-current="true"] {
  color: var(--volt);
  border-left-color: var(--volt);
  padding-left: 18px;
}

/* ---------------- 章节 ---------------- */

.page-about .about-section {
  padding-bottom: clamp(46px, 7vw, 86px);
  margin-bottom: clamp(46px, 7vw, 86px);
  border-bottom: 1px solid var(--line);
}

.page-about .about-section:last-of-type {
  border-bottom: 0;
}

.page-about .about-section h2 {
  margin: 12px 0 20px;
  max-width: 24em;
  font-size: clamp(26px, 4.6vw, 40px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.006em;
  color: var(--white);
}

.page-about .about-section .prose {
  max-width: 44em;
}

/* ---------------- 引用块 ---------------- */

.page-about .quote-card {
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: clamp(22px, 3.4vw, 34px) clamp(22px, 3.4vw, 38px);
  border-radius: var(--r);
  border: 1px solid var(--line);
  border-left: 3px solid var(--volt);
  transition: transform var(--t), border-color var(--t);
}

.page-about .quote-card:hover {
  transform: translateY(-2px);
  border-color: var(--line-strong);
}

.page-about .quote-card p {
  margin: 0;
  font-size: clamp(17px, 2.3vw, 21px);
  line-height: 1.62;
  color: var(--white);
}

/* ---------------- 两步法 ---------------- */

.page-about .steps {
  list-style: none;
  margin: clamp(22px, 3.6vw, 34px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(14px, 2.4vw, 20px);
}

.page-about .step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(14px, 2.6vw, 24px);
  padding: clamp(18px, 3vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: linear-gradient(140deg, var(--turf) 0%, rgba(18, 63, 53, 0.6) 100%);
}

.page-about .step__num {
  font-family: var(--font-score);
  font-size: clamp(32px, 5.2vw, 46px);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: 0.02em;
  color: var(--volt);
}

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

.page-about .step__title {
  margin: 0 0 9px;
  font-size: clamp(17px, 2.4vw, 21px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--white);
}

.page-about .step__text {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.72;
}

/* ---------------- 时间轴 ---------------- */

.page-about .timeline {
  list-style: none;
  margin: clamp(28px, 4.4vw, 42px) 0 0;
  padding: 0 0 0 28px;
  position: relative;
  display: grid;
  gap: clamp(24px, 4vw, 38px);
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--volt) 0%, rgba(215, 255, 63, 0.34) 46%, rgba(215, 255, 63, 0.06) 100%);
}

.page-about .timeline__item {
  position: relative;
  min-width: 0;
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 5px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--night);
  border: 2px solid var(--volt);
  box-shadow: 0 0 0 4px rgba(11, 43, 38, 0.92);
}

.page-about .timeline__year {
  margin: 0 0 6px;
  font-family: var(--font-score);
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--volt);
}

.page-about .timeline__title {
  margin: 0 0 8px;
  font-size: clamp(17px, 2.4vw, 21px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--white);
}

.page-about .timeline__text {
  margin: 0;
  max-width: 42em;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.72;
}

/* ---------------- 图片 ---------------- */

.page-about .about-figure {
  margin: clamp(26px, 4vw, 42px) 0;
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
  background: var(--turf);
}

.page-about .about-figure .media__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-figure .media__caption {
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------------- 团队数据带 ---------------- */

.page-about .crew {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: clamp(22px, 3.6vw, 34px) 0;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--line);
  overflow: hidden;
}

@media (min-width: 680px) {
  .page-about .crew {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .crew__cell {
  background: var(--turf);
  padding: clamp(18px, 3vw, 26px);
}

.page-about .crew__num {
  display: block;
  margin-bottom: 9px;
  font-family: var(--font-score);
  font-size: clamp(30px, 4.8vw, 44px);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: 0.01em;
  color: var(--volt);
}

.page-about .crew__label {
  margin: 0;
  font-size: 14px;
  line-height: 1.66;
  color: var(--muted);
}

/* ---------------- 结尾行动区 ---------------- */

.page-about .about-cta {
  position: relative;
  overflow: hidden;
  margin-top: clamp(8px, 2vw, 20px);
  padding: clamp(28px, 5vw, 54px) clamp(24px, 4.6vw, 52px);
  border: 1px solid var(--line);
  border-radius: var(--r);
  background:
    radial-gradient(120% 100% at 88% 0%, var(--about-glow), transparent 58%),
    linear-gradient(150deg, var(--turf) 0%, var(--night) 74%);
}

.page-about .about-cta::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--about-ribbon);
}

.page-about .about-cta h2 {
  margin: 0 0 16px;
  font-size: clamp(24px, 4vw, 34px);
  font-weight: 800;
  line-height: 1.24;
  color: var(--white);
}

.page-about .about-cta p {
  margin: 0;
  max-width: 46em;
  color: rgba(244, 255, 248, 0.8);
  font-size: 16px;
  line-height: 1.76;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3.4vw, 32px);
}

/* ---------------- 窄屏兜底 ---------------- */

@media (max-width: 480px) {
  .page-about .step {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
  }

  .page-about .step__num {
    font-size: 30px;
  }

  .page-about .about-hero__actions .btn,
  .page-about .about-cta__actions .btn {
    flex: 1 1 100%;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .quote-card,
  .page-about .about-toc__link {
    transition: none;
  }

  .page-about .quote-card:hover {
    transform: none;
  }
}