.page-about {
  --about-line: #1E3A54;
  --about-ink: #EAF1F7;
  --about-muted: #93A9BF;
  --about-orange: #FF6A1F;
  --about-amber: #FFAE5C;
  --about-cyan: #29E7D4;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(22px, 4vw, 52px) 0 0;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  z-index: -2;
  top: -72px;
  left: -12%;
  width: 124%;
  height: 128%;
  background: linear-gradient(118deg, #122B47 0%, #0B3B38 46%, #04080F 80%);
  transform: skewY(-3.2deg);
  border-radius: 0 0 64px 64px;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  z-index: -1;
  top: clamp(20px, 4.5vw, 54px);
  right: -58px;
  width: clamp(120px, 16vw, 210px);
  height: 12px;
  border-radius: 999px;
  background: var(--orange);
  transform: rotate(-10deg);
  box-shadow: 0 0 34px rgba(255, 106, 31, 0.48);
}

.page-about .hero-inner {
  display: grid;
  gap: 32px;
  padding-bottom: clamp(38px, 6vw, 76px);
}

@media (min-width: 920px) {
  .page-about .hero-inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 52px;
    align-items: end;
  }
}

.page-about .hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .hero-kicker::before {
  content: "";
  width: 26px;
  height: 2px;
  border-radius: 2px;
  background: var(--orange);
}

.page-about h1 {
  margin: 0 0 22px;
  max-width: 620px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 4.6vw, 56px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .hero-lead {
  margin: 0 0 26px;
  max-width: 640px;
  font-size: clamp(15px, 1.1vw, 17px);
  line-height: 1.82;
  color: rgba(234, 241, 247, 0.78);
}

.page-about .hero-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: 999px;
  border: 1px solid rgba(41, 231, 212, 0.55);
  background: rgba(4, 8, 15, 0.45);
  color: var(--cyan);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: border-color 0.24s var(--ease), color 0.24s var(--ease),
    transform 0.24s var(--ease);
}

.page-about .hero-link:hover,
.page-about .hero-link:focus-visible {
  border-color: var(--amber);
  color: var(--amber);
  transform: translateY(-3px);
}

.page-about .hero-board {
  position: relative;
  align-self: end;
  margin-left: auto;
  width: 100%;
  max-width: 420px;
  padding: 26px 24px 24px;
  border-radius: 24px;
  border: 1px solid rgba(41, 231, 212, 0.22);
  background: linear-gradient(158deg, rgba(10, 26, 43, 0.96), rgba(4, 8, 15, 0.92));
  box-shadow: 0 34px 70px -42px rgba(41, 231, 212, 0.55);
}

.page-about .hero-board::before {
  content: "";
  position: absolute;
  left: -14px;
  top: 32px;
  width: 8px;
  height: 56px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--orange), var(--amber));
}

.page-about .hero-board-title {
  margin: 0 0 18px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--about-muted);
}

.page-about .hero-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .hero-fact {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .hero-fact-num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 2.8vw, 32px);
  font-weight: 600;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .hero-fact-label {
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--about-muted);
}

/* ---------- 主体布局 ---------- */
.page-about .about-body-section {
  padding: clamp(40px, 6vw, 92px) 0 clamp(48px, 7vw, 104px);
}

.page-about .about-layout {
  display: grid;
  gap: 28px;
}

@media (min-width: 1024px) {
  .page-about .about-layout {
    grid-template-columns: 172px minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }
}

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

@media (min-width: 1024px) {
  .page-about .about-rail {
    display: block;
    position: sticky;
    top: 100px;
    padding-top: 10px;
  }
}

.page-about .about-rail-title {
  margin: 0 0 20px;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--about-muted);
}

.page-about .rail-track {
  position: relative;
  margin: 0;
  padding: 0 0 0 28px;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 26px;
}

.page-about .rail-track::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--orange), rgba(41, 231, 212, 0.16));
}

.page-about .rail-track li {
  position: relative;
}

.page-about .rail-track a {
  display: block;
  font-size: 13px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--about-muted);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

.page-about .rail-track a::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 6px;
  width: 12px;
  height: 12px;
  box-sizing: border-box;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--about-line);
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .rail-track a:hover,
.page-about .rail-track a:focus-visible {
  color: var(--ink);
}

.page-about .rail-track a:hover::before,
.page-about .rail-track a:focus-visible::before {
  background: var(--orange);
  border-color: var(--orange);
}

.page-about .about-body {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* ---------- 面板基座 ---------- */
.page-about .about-panel {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 3vw, 42px);
  border-radius: 24px;
  border: 1px solid var(--about-line);
  background: linear-gradient(155deg, rgba(18, 43, 71, 0.72), rgba(10, 26, 43, 0.96) 62%);
  scroll-margin-top: 96px;
}

.page-about .about-panel::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(41, 231, 212, 0.6), transparent);
}

.page-about .about-panel--green {
  background: linear-gradient(155deg, rgba(11, 59, 56, 0.72), rgba(10, 26, 43, 0.96) 62%);
}

.page-about .about-panel--wine {
  background: linear-gradient(155deg, rgba(74, 21, 38, 0.68), rgba(10, 26, 43, 0.96) 62%);
}

.page-about .about-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 10px;
}

.page-about .about-num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--orange);
}

.page-about .about-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .about-lead {
  margin: 0 0 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--amber);
  letter-spacing: 0.01em;
}

.page-about .about-prose {
  margin: 0 0 20px;
  max-width: 660px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--about-muted);
}

.page-about .about-prose:last-of-type {
  margin-bottom: 0;
}

.page-about .about-entry {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid rgba(30, 58, 84, 0.8);
}

.page-about .about-entry .chip {
  text-decoration: none;
}

/* ---------- 沿革 ---------- */
.page-about .era-list {
  margin: 6px 0 0 6px;
  padding: 0 0 0 22px;
  list-style: none;
  border-left: 2px solid var(--about-line);
}

.page-about .era-item {
  position: relative;
  padding: 20px 0;
  border-bottom: 1px dashed rgba(30, 58, 84, 0.9);
}

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

.page-about .era-item::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 26px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 106, 31, 0.16);
}

.page-about .era-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.page-about .era-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(18px, 2vw, 22px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .era-text {
  margin: 0;
  max-width: 640px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--about-muted);
}

/* ---------- 团队 ---------- */
.page-about .team-figure {
  margin: 0 0 28px;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid rgba(30, 58, 84, 0.9);
}

.page-about .team-bars {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .team-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px 14px;
  align-items: center;
  padding: 14px 16px;
  border-radius: 16px;
  border: 1px solid transparent;
  transition: border-color 0.24s var(--ease), background 0.24s var(--ease);
}

.page-about .team-row:hover {
  border-color: rgba(41, 231, 212, 0.35);
  background: rgba(18, 43, 71, 0.5);
}

.page-about .team-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
}

.page-about .team-value {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 600;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .team-track {
  grid-column: 1 / -1;
  display: block;
  height: 6px;
  border-radius: 999px;
  background: rgba(4, 8, 15, 0.9);
  border: 1px solid var(--about-line);
  overflow: hidden;
}

.page-about .team-fill {
  display: block;
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--orange), var(--amber));
}

.page-about .team-fill--edit { width: 38%; }
.page-about .team-fill--tech {
  width: 32%;
  background: linear-gradient(90deg, #1aa89c, var(--cyan));
}
.page-about .team-fill--ops {
  width: 18%;
  background: linear-gradient(90deg, var(--amber), var(--orange));
}
.page-about .team-fill--cs {
  width: 12%;
  background: linear-gradient(90deg, #4c8ecf, var(--cyan));
}

.page-about .team-note {
  grid-column: 1 / -1;
  margin: 2px 0 0;
  max-width: 640px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--about-muted);
}

/* ---------- 一天的工作节奏 ---------- */
.page-about .dayline {
  margin: 4px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .dayline-item {
  padding: 18px 0;
  border-bottom: 1px solid rgba(30, 58, 84, 0.72);
}

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

@media (min-width: 560px) {
  .page-about .dayline-item {
    display: grid;
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 20px;
    align-items: start;
  }
}

.page-about .dayline-time {
  display: inline-block;
  margin-bottom: 8px;
  padding: 3px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255, 106, 31, 0.5);
  background: rgba(255, 106, 31, 0.12);
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--orange);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

@media (min-width: 560px) {
  .page-about .dayline-time {
    margin-bottom: 0;
    margin-top: 1px;
  }
}

.page-about .dayline-body h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .dayline-body p {
  margin: 0;
  max-width: 640px;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--about-muted);
}

/* ---------- 合作生态 ---------- */
.page-about .eco-layout {
  display: grid;
  gap: 28px;
}

@media (min-width: 900px) {
  .page-about .eco-layout {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 40px;
    align-items: start;
  }
}

.page-about .eco-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-about .eco-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 18px;
  border-radius: 16px;
  border: 1px solid var(--about-line);
  background: rgba(4, 8, 15, 0.52);
  transition: transform 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-about .eco-item:hover {
  transform: translateY(-3px);
  border-color: rgba(255, 106, 31, 0.5);
}

.page-about .eco-item h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .eco-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.74;
  color: var(--about-muted);
}

.page-about .eco-figure {
  margin: 0;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid rgba(41, 231, 212, 0.24);
}

/* ---------- 服务区域 ---------- */
.page-about .region-grid {
  display: grid;
  gap: 26px;
}

@media (min-width: 900px) {
  .page-about .region-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 40px;
    align-items: center;
  }
}

.page-about .region-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 14px;
  margin-top: 24px;
}

.page-about .region-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  border-radius: 16px;
  border: 1px solid var(--about-line);
  background: rgba(4, 8, 15, 0.55);
}

.page-about .region-stat-num {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 600;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .region-stat-label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--about-muted);
}

.page-about .region-figure {
  margin: 0;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid rgba(30, 58, 84, 0.9);
  aspect-ratio: 14 / 9;
}

.page-about .region-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 里程碑 ---------- */
.page-about .milestone-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 4px;
}

.page-about .mile-tag {
  display: inline-block;
  margin-right: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--orange);
}

.page-about .fold-body p {
  margin: 0;
  max-width: 660px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--about-muted);
}

/* ---------- 图片通用 ---------- */
.page-about img {
  display: block;
  max-width: 100%;
  height: auto;
}

.page-about .figure img {
  width: 100%;
}

@media (max-width: 559px) {
  .page-about .about-panel {
    border-radius: 20px;
  }

  .page-about .hero-board::before {
    display: none;
  }

  .page-about .era-list {
    margin-left: 2px;
    padding-left: 18px;
  }

  .page-about .era-item::before {
    left: -24px;
  }

  .page-about .about-hero::after {
    right: -70px;
    height: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-row,
  .page-about .eco-item,
  .page-about .hero-link {
    transition: opacity 0.2s linear;
  }

  .page-about .team-row:hover,
  .page-about .eco-item:hover,
  .page-about .hero-link:hover {
    transform: none;
  }
}