/* ===== 品牌介绍 · 看台年鉴式纵向时间轴 ===== */
.page-about {
  --about-rail: 208px;
  --about-amber-soft: rgba(255, 198, 74, 0.14);
  --about-cyan-soft: rgba(47, 224, 200, 0.1);
  background: var(--ink-900);
  color: var(--paper);
}

.page-about .visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---- 首屏 ---- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding: clamp(60px, 10vw, 116px) 0 clamp(40px, 6vw, 72px);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero__img {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  max-width: none;
  object-fit: cover;
  object-position: center 62%;
  opacity: 0.34;
}

.page-about .about-hero__veil {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(180deg, rgba(6, 23, 37, 0.44) 0%, rgba(6, 23, 37, 0.88) 56%, var(--ink-900) 100%),
    repeating-linear-gradient(90deg, rgba(147, 169, 190, 0.07) 0 1px, transparent 1px 96px);
}

.page-about .about-hero__inner {
  position: relative;
}

.page-about .crumb-sep {
  color: var(--mist);
  margin: 0 8px;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(28px, 6.4vw, 54px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  margin: 14px 0 0;
  max-width: 20ch;
  color: var(--paper);
}

.page-about .about-hero__lead {
  margin: 18px 0 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-stats {
  list-style: none;
  margin: clamp(28px, 5vw, 46px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
  border-right: 1px solid var(--line);
}

.page-about .about-stat {
  background: rgba(6, 23, 37, 0.74);
  padding: 16px 18px 18px;
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(26px, 5vw, 34px);
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-stat__num em {
  font-style: normal;
  font-size: 0.44em;
  color: var(--cyan);
  margin-left: 4px;
  letter-spacing: 0.04em;
}

.page-about .about-stat__label {
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---- 章节头 ---- */
.page-about .sec-head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .sec-idx {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--cyan);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.page-about .sec-idx::after {
  content: "";
  width: 42px;
  height: 1px;
  background: var(--signal);
}

.page-about .sec-head h2,
.page-about .start-copy h2 {
  font-family: var(--font-display);
  font-size: clamp(23px, 3.6vw, 38px);
  line-height: 1.22;
  letter-spacing: -0.02em;
  margin: 0;
  color: var(--paper);
}

.page-about .sec-lead {
  margin: 0;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--mist);
}

/* ---- 时间轴 ---- */
.page-about .tl-wrap {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}

.page-about .tl-index {
  border: 1px solid var(--line);
  background: rgba(12, 44, 70, 0.36);
  padding: 14px 16px;
}

.page-about .tl-index__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .tl-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .tl-index__list a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  padding: 6px 10px;
  border: 1px solid var(--line);
  color: var(--mist);
  font-size: 13px;
  text-decoration: none;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-about .tl-index__list a:hover,
.page-about .tl-index__list a:focus-visible {
  color: var(--paper);
  border-color: var(--signal);
}

.page-about .tl-index__list .num {
  color: var(--amber);
  font-size: 12px;
}

.page-about .tl-list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .tl-list::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--amber) 0%, rgba(255, 198, 74, 0.28) 52%, rgba(255, 198, 74, 0.08) 100%);
}

.page-about .tl-item {
  position: relative;
  padding-left: 30px;
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 20px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--amber);
}

.page-about .tl-node {
  border: 1px solid var(--line);
  background: rgba(12, 44, 70, 0.42);
  transition: border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}

.page-about .tl-node:hover {
  border-color: rgba(255, 106, 31, 0.6);
}

.page-about .tl-node[open] {
  background: rgba(12, 44, 70, 0.62);
  box-shadow: var(--shadow-lift);
}

.page-about .tl-head {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 4px 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .tl-idx {
  font-size: 22px;
  font-weight: 700;
  color: var(--signal);
  line-height: 1;
}

.page-about .tl-season {
  grid-column: 2;
  grid-row: 1;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-about .tl-title {
  grid-column: 1 / -1;
  grid-row: 2;
  font-family: var(--font-display);
  font-size: 17px;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .tl-caret {
  grid-column: 3;
  grid-row: 1;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--mist);
  border-bottom: 2px solid var(--mist);
  transform: rotate(45deg);
  transition: transform var(--t-fast) var(--ease);
}

.page-about .tl-node[open] .tl-caret {
  transform: rotate(-135deg);
  border-color: var(--cyan);
}

.page-about .tl-body {
  padding: 0 18px 18px;
  border-top: 1px solid var(--line-soft);
  margin-top: 2px;
}

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

.page-about .tl-gain {
  color: var(--paper) !important;
  border-left: 2px solid var(--cyan);
  padding-left: 12px;
}

/* ---- 五大频道 ---- */
.page-about .chan-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .chan-row {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 6px 14px;
  align-items: start;
  padding: 16px 18px;
  border: 1px solid var(--line);
  background: var(--ink-800);
  transition: border-color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}

.page-about .chan-row:hover {
  border-color: var(--signal);
  transform: translateY(-2px);
}

.page-about .chan-idx {
  font-size: 20px;
  font-weight: 700;
  color: var(--cyan);
  line-height: 1.4;
}

.page-about .chan-main h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 17px;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .chan-main p {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.74;
  color: var(--mist);
}

.page-about .chan-link {
  grid-column: 2;
  justify-self: start;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--signal);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 106, 31, 0.4);
  padding-bottom: 2px;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-about .chan-link:hover,
.page-about .chan-link:focus-visible {
  color: var(--amber);
  border-color: var(--amber);
}

/* ---- 团队 ---- */
.page-about .team-grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-about .team-media {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-800);
  padding: 10px;
}

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

.page-about .team-media .media-caption {
  margin: 10px 2px 2px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .team-bars {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .team-bar {
  padding: 16px 18px;
  border-left: 2px solid var(--line);
  background: linear-gradient(90deg, rgba(12, 44, 70, 0.5), rgba(12, 44, 70, 0.12));
  transition: border-color var(--t-fast) var(--ease);
}

.page-about .team-bar:hover {
  border-left-color: var(--cyan);
}

.page-about .team-bar__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.page-about .team-bar__name {
  font-family: var(--font-display);
  font-size: 16px;
  color: var(--paper);
  letter-spacing: -0.01em;
}

.page-about .team-bar__track {
  display: block;
  margin: 12px 0 0;
  height: 6px;
  background: rgba(147, 169, 190, 0.14);
  overflow: hidden;
}

.page-about .team-bar__fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--signal), var(--amber));
}

.page-about .team-bar--a .team-bar__fill { width: 42%; }
.page-about .team-bar--b .team-bar__fill { width: 34%; }
.page-about .team-bar--c .team-bar__fill { width: 24%; }

.page-about .team-bar__desc {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.74;
  color: var(--mist);
}

/* ---- 更新节奏 ---- */
.page-about .cadence-grid {
  display: grid;
  gap: clamp(22px, 3.4vw, 36px);
}

.page-about .table-scroll {
  overflow-x: auto;
  border: 1px solid var(--line);
  background: rgba(10, 22, 34, 0.7);
}

.page-about .cadence-table table {
  width: 100%;
  min-width: 540px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-about .cadence-table thead th {
  text-align: left;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  background: rgba(12, 44, 70, 0.55);
  white-space: nowrap;
}

.page-about .cadence-table tbody th {
  text-align: left;
  font-weight: 600;
  color: var(--paper);
  padding: 13px 14px;
  border-bottom: 1px solid var(--line-soft);
  white-space: nowrap;
}

.page-about .cadence-table tbody td {
  padding: 13px 14px;
  border-bottom: 1px solid var(--line-soft);
  color: var(--mist);
  line-height: 1.62;
}

.page-about .cadence-table tbody tr:nth-child(even) {
  background: rgba(10, 22, 34, 0.6);
}

.page-about .cadence-table tbody tr:hover {
  background: rgba(47, 224, 200, 0.06);
}

.page-about .cadence-note {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.74;
  color: var(--mist);
  border-left: 2px solid var(--signal);
  padding-left: 12px;
}

.page-about .cadence-media {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-800);
  padding: 10px;
}

.page-about .cadence-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-about .cadence-media .media-caption {
  margin: 10px 2px 2px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---- 信息来源 ---- */
.page-about .src-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .src-card {
  padding: 18px;
  border: 1px solid var(--line);
  border-top: 2px solid var(--cyan);
  background: rgba(12, 44, 70, 0.34);
  transition: border-color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}

.page-about .src-card:hover {
  border-color: var(--signal);
  border-top-color: var(--amber);
  transform: translateY(-2px);
}

.page-about .src-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 16px;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .src-card p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.74;
  color: var(--mist);
}

.page-about .src-line {
  margin: 20px 0 0;
  padding: 14px 16px;
  border: 1px dashed var(--line);
  font-size: 14px;
  line-height: 1.74;
  color: var(--mist);
}

/* ---- 收尾行动区 ---- */
.page-about .start-band {
  background:
    linear-gradient(180deg, rgba(12, 44, 70, 0.5) 0%, rgba(6, 23, 37, 0.9) 100%),
    repeating-linear-gradient(-12deg, rgba(47, 224, 200, 0.06) 0 2px, transparent 2px 26px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .start-inner {
  display: grid;
  gap: 22px;
}

.page-about .start-copy p {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .start-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .start-actions .btn {
  white-space: nowrap;
}

/* ---- 响应式 ---- */
@media (min-width: 720px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .chan-row {
    grid-template-columns: 46px minmax(0, 1fr) auto;
    align-items: center;
  }

  .page-about .chan-link {
    grid-column: 3;
    justify-self: end;
    align-self: center;
  }

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

  .page-about .start-inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: center;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero h1 {
    font-size: clamp(40px, 4vw, 54px);
  }

  .page-about .tl-wrap {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .tl-index {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }

  .page-about .tl-index__list {
    flex-direction: column;
    overflow: visible;
    gap: 6px;
  }

  .page-about .tl-index__list a {
    width: 100%;
    justify-content: flex-start;
  }

  .page-about .tl-head {
    grid-template-columns: auto auto minmax(0, 1fr) auto;
    gap: 0 14px;
    padding: 18px 22px;
  }

  .page-about .tl-season {
    grid-column: 2;
    grid-row: 1;
  }

  .page-about .tl-title {
    grid-column: 3;
    grid-row: 1;
    font-size: 19px;
  }

  .page-about .tl-caret {
    grid-column: 4;
    grid-row: 1;
  }

  .page-about .tl-body {
    padding: 0 22px 20px 74px;
  }

  .page-about .team-grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    align-items: start;
  }

  .page-about .team-media {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }

  .page-about .cadence-grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: start;
  }
}
<<<END>>>