/* ================= 品牌与团队 /team/ ================= */
.page-about {
  display: block;
  background: var(--ink-800);
  color: var(--white);
  font-family: var(--font-body);
}

.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: border-box;
}

.page-about img {
  max-width: 100%;
  height: auto;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  margin: 0 0 clamp(22px, 4vw, 38px);
}

.page-about .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--gray);
}

.page-about .breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin-right: 8px;
  color: var(--gray);
  opacity: 0.6;
}

.page-about .breadcrumb-item a {
  color: var(--sand);
  text-decoration: none;
  transition: color 0.2s ease;
}

.page-about .breadcrumb-item a:hover,
.page-about .breadcrumb-item a:focus-visible {
  color: var(--orange);
}

.page-about .breadcrumb-item[aria-current="page"] {
  color: var(--white);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(26px, 5vw, 54px) 0 clamp(38px, 6vw, 76px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(233, 211, 168, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(233, 211, 168, 0.05) 1px, transparent 1px);
  background-size: 24px 24px;
  -webkit-mask-image: radial-gradient(circle at 72% 28%, #000 0%, transparent 70%);
  mask-image: radial-gradient(circle at 72% 28%, #000 0%, transparent 70%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: -190px;
  right: -170px;
  width: 540px;
  height: 540px;
  background: radial-gradient(circle, var(--glow-orange), transparent 65%);
  pointer-events: none;
}

.page-about .about-hero > .container {
  position: relative;
  z-index: 1;
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 54px);
}

.page-about .hero-kicker {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--orange);
  text-transform: uppercase;
}

.page-about .hero-kicker .mono {
  color: var(--sand);
}

.page-about .about-hero h1 {
  margin: 0 0 18px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(30px, 6.2vw, 62px);
  line-height: 1.12;
  letter-spacing: -0.015em;
  color: var(--white);
  text-wrap: balance;
}

.page-about .about-hero .lede {
  margin: 0;
  max-width: 46ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: rgba(244, 247, 255, 0.84);
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-about .hero-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--line-mid);
  border: 1px solid var(--line-mid);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
  overflow: hidden;
}

.page-about .hero-facts .fact {
  padding: 18px 16px;
  background: linear-gradient(155deg, rgba(22, 34, 74, 0.96), rgba(11, 18, 36, 0.96));
}

.page-about .hero-facts dt {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.13em;
  color: var(--gray);
}

.page-about .hero-facts dd {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(20px, 2.4vw, 28px);
  line-height: 1.2;
  color: var(--white);
}

.page-about .hero-facts dd.mono {
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: 0.02em;
}

/* ---------- 主体：左栏导读 + 右栏正文 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 4vw, 46px);
  padding: clamp(34px, 6vw, 68px) 0 clamp(54px, 8vw, 104px);
}

.page-about .rail-title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gray);
}

.page-about .rail-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .rail-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 14px;
  font-size: 14px;
  color: var(--gray);
  text-decoration: none;
  border-left: 2px solid transparent;
  border-radius: var(--radius-pill);
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

.page-about .rail-link:hover,
.page-about .rail-link:focus-visible {
  color: var(--white);
  background: rgba(255, 106, 31, 0.1);
  border-left-color: var(--orange);
}

.page-about .rail-num {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--orange);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-section {
  padding: clamp(28px, 5vw, 54px) 0;
  border-top: 1px solid var(--line-soft);
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-about .about-section:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .sec-head {
  display: flex;
  align-items: flex-start;
  gap: clamp(12px, 2vw, 20px);
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-about .sec-num {
  flex: 0 0 auto;
  writing-mode: vertical-rl;
  padding: 2px 0 2px 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.3em;
  color: var(--orange);
  border-left: 1px solid var(--line-mid);
}

.page-about .sec-head h2 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(23px, 3.6vw, 38px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--white);
  text-wrap: balance;
}

.page-about .sec-head .meta {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--gray);
}

.page-about .about-section p {
  margin: 0 0 16px;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(244, 247, 255, 0.86);
}

.page-about .about-section h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(16px, 2vw, 19px);
  line-height: 1.4;
  color: var(--white);
}

/* ---------- 团队条形图 ---------- */
.page-about .bar-chart {
  display: grid;
  gap: 14px;
  margin: clamp(20px, 3vw, 32px) 0;
}

.page-about .bar-row {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas:
    "label value"
    "track track";
  gap: 10px 14px;
  align-items: center;
  padding: 14px 16px;
  background: rgba(22, 34, 74, 0.55);
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

.page-about .bar-row:hover {
  background: rgba(22, 34, 74, 0.88);
  border-color: var(--line-mid);
}

.page-about .bar-label {
  grid-area: label;
  font-size: 14px;
  color: var(--white);
}

.page-about .bar-value {
  grid-area: value;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 14px;
  color: var(--sand);
}

.page-about .bar-track {
  grid-area: track;
  display: block;
  height: 8px;
  border-radius: var(--radius-pill);
  background: rgba(110, 120, 145, 0.25);
  overflow: hidden;
}

.page-about .bar-fill {
  display: block;
  height: 100%;
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, var(--orange-deep), var(--orange));
}

.page-about .bar-fill.is-cyan {
  background: linear-gradient(90deg, #0d7d72, var(--cyan));
}

.page-about .bar-fill.is-sand {
  background: linear-gradient(90deg, #8a7850, var(--sand));
}

.page-about .chart-note {
  font-size: 13px;
  line-height: 1.8;
  color: var(--gray);
}

/* ---------- 图片 ---------- */
.page-about .figure {
  margin: clamp(22px, 3vw, 34px) 0 0;
}

.page-about .figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line-soft);
  background: var(--ink-700);
}

.page-about .figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--gray);
}

/* ---------- 标签胶囊带 ---------- */
.page-about .chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: clamp(18px, 3vw, 26px) 0;
  padding: 0;
  list-style: none;
}

.page-about .chip-row .chip {
  padding: 7px 14px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--sand);
  background: rgba(233, 211, 168, 0.07);
  border: 1px solid var(--line-mid);
  border-bottom: 3px solid var(--orange);
  border-radius: var(--radius-pill);
}

/* ---------- 比赛日节奏 ---------- */
.page-about .flow-list {
  display: grid;
  gap: 2px;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .flow-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 18px 18px 18px 20px;
  border-left: 2px solid var(--line-mid);
  background: linear-gradient(90deg, rgba(22, 34, 74, 0.5), transparent 82%);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.page-about .flow-item:hover {
  border-left-color: var(--orange);
  background: linear-gradient(90deg, rgba(22, 34, 74, 0.82), transparent 82%);
}

.page-about .flow-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
}

.page-about .flow-time {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--orange);
}

/* ---------- 版本时间线 ---------- */
.page-about .version-track {
  position: relative;
  margin-top: clamp(22px, 3vw, 34px);
  padding-left: 28px;
}

.page-about .version-track::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 16px;
  bottom: 16px;
  width: 1px;
  background: linear-gradient(180deg, var(--gray) 0%, var(--orange) 55%, var(--cyan) 100%);
  opacity: 0.55;
}

.page-about .tl-item {
  position: relative;
  margin-bottom: 12px;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 17px;
  width: 12px;
  height: 12px;
  border: 2px solid var(--gray);
  border-radius: 50%;
  background: var(--ink-800);
}

.page-about .tl-item.is-mid::before {
  border-color: var(--orange);
}

.page-about .tl-item.is-current::before {
  border-color: var(--cyan);
  animation: about-pulse 2.4s ease-in-out infinite;
}

.page-about .tl-summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 15px 18px;
  list-style: none;
  cursor: pointer;
  background: linear-gradient(120deg, rgba(22, 34, 74, 0.85), rgba(11, 18, 36, 0.6));
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
  transition: border-color 0.2s ease, background 0.2s ease;
}

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

.page-about .tl-summary:hover {
  border-color: var(--line-mid);
}

.page-about .tl-item[open] .tl-summary {
  border-color: rgba(255, 106, 31, 0.42);
}

.page-about .tl-ver {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--orange);
}

.page-about .tl-year {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gray);
}

.page-about .tl-name {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 16px;
  color: var(--white);
}

.page-about .tl-body {
  padding: 14px 18px 4px 0;
}

.page-about .tl-body p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 247, 255, 0.8);
}

/* ---------- 引言留白带 ---------- */
.page-about .pull-quote {
  margin: clamp(38px, 7vw, 84px) 0;
  padding: clamp(26px, 5vw, 50px) clamp(18px, 4vw, 40px);
  background: linear-gradient(90deg, rgba(255, 106, 31, 0.08), transparent 72%);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .pull-quote p {
  margin: 0;
  max-width: 22ch;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(20px, 3.1vw, 32px);
  line-height: 1.55;
  color: var(--white);
}

/* ---------- 内容准则卡片 ---------- */
.page-about .rule-stack {
  display: grid;
  gap: 18px;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .rule-card {
  padding: 22px 22px 24px;
  background: var(--ink-700);
  border: 1px solid var(--line-mid);
  box-shadow: 8px 8px 0 -2px rgba(233, 211, 168, 0.08), 16px 16px 0 -6px rgba(233, 211, 168, 0.04);
}

.page-about .rule-tag {
  display: inline-block;
  margin-bottom: 12px;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--ink-900);
  background: var(--sand);
  border-bottom: 3px solid var(--orange);
}

.page-about .rule-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(244, 247, 255, 0.8);
}

/* ---------- 地区与联系 ---------- */
.page-about .region-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 3vw, 28px);
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .figure-region {
  margin: 0;
}

.page-about .contact-card {
  padding: 22px;
  background: linear-gradient(150deg, rgba(22, 34, 74, 0.92), rgba(5, 7, 15, 0.92));
  border: 1px solid var(--line-mid);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-about .contact-card dl {
  display: grid;
  gap: 18px;
  margin: 0;
}

.page-about .contact-card dt {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: 0.13em;
  color: var(--gray);
}

.page-about .contact-card dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--white);
  overflow-wrap: anywhere;
}

/* ---------- 动效 ---------- */
@keyframes about-pulse {
  0%,
  100% {
    box-shadow: 0 0 0 3px rgba(43, 224, 200, 0.16);
  }
  50% {
    box-shadow: 0 0 0 9px rgba(43, 224, 200, 0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl-item.is-current::before {
    animation: none;
    box-shadow: 0 0 0 4px rgba(43, 224, 200, 0.14);
  }
  .page-about .bar-row,
  .page-about .flow-item,
  .page-about .tl-summary,
  .page-about .rail-link {
    transition: none;
  }
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .flow-item {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 20px;
    align-items: start;
  }
}

@media (min-width: 760px) {
  .page-about .rule-stack {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 820px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.82fr);
    align-items: end;
    gap: clamp(34px, 5vw, 64px);
  }

  .page-about .region-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-about .tl-item:nth-child(1) {
    margin-right: 88px;
  }

  .page-about .tl-item:nth-child(2) {
    margin-right: 44px;
  }

  .page-about .tl-item:nth-child(3) {
    margin-right: 0;
  }
}

@media (min-width: 1000px) {
  .page-about .about-layout {
    grid-template-columns: 200px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-rail-inner {
    position: sticky;
    top: calc(var(--header-h) + 16px);
  }

  .page-about .rail-list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
  }

  .page-about .rail-link {
    border-radius: 0 var(--radius-pill) var(--radius-pill) 0;
  }
}

@media (min-width: 1180px) {
  .page-about .about-layout {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 56px;
  }

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