.page-about {
  --about-blue-glow: radial-gradient(ellipse 60% 40% at 70% 0%, rgba(0, 200, 255, 0.1), transparent 70%);
  --about-green-glow: radial-gradient(ellipse 50% 36% at 20% 100%, rgba(57, 255, 20, 0.07), transparent 70%);
}

/* ---------- 面包屑 ---------- */
.page-about .about-breadcrumb {
  padding-top: 22px;
  margin-bottom: 8px;
  font-size: 13px;
  letter-spacing: 0.4px;
}
.page-about .about-breadcrumb .breadcrumb-current {
  color: var(--text-secondary);
}

/* ---------- 章节头部 ---------- */
.page-about .about-section-head {
  margin-bottom: 44px;
  display: grid;
  gap: 12px;
}
.page-about .about-head-top {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 6px;
}
.page-about .about-head-top .chapter-num {
  font-family: var(--font-mono);
  font-size: 42px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -2px;
  color: var(--accent-orange);
}
.page-about .about-section-head .section-title {
  margin: 0;
}
.page-about .about-section-head .section-desc {
  margin: 0;
  max-width: 720px;
}

/* ---------- 01 品牌档案 Hero ---------- */
.page-about .about-hero {
  position: relative;
  padding: 40px 0 56px;
}
.page-about .about-hero .container {
  position: relative;
  z-index: 1;
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -80px;
  top: 40px;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 200, 255, 0.08), transparent 65%);
  pointer-events: none;
}
.page-about .about-hero-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: start;
}
.page-about .about-main-title {
  margin: 0 0 24px;
  font-family: var(--font-display);
  font-size: clamp(30px, 4.4vw, 52px);
  line-height: 1.12;
  font-weight: 800;
  font-style: italic;
  letter-spacing: -0.5px;
  color: var(--text-primary);
}
.page-about .about-brand-name {
  color: var(--accent-blue);
}
.page-about .about-main-title .mono {
  font-style: normal;
  color: var(--accent-green);
}
.page-about .about-hero-lead {
  margin: 0 0 16px;
  color: var(--text-primary);
  font-size: 16px;
  line-height: 1.85;
}
.page-about .about-hero-sub {
  margin: 0 0 22px;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.85;
}
.page-about .about-hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- Hero 数据速览面板 ---------- */
.page-about .about-hero-fact {
  background: var(--bg-panel);
  padding: 26px 22px;
  box-shadow: var(--shadow-card);
}
.page-about .about-fact-list {
  margin: 0;
}
.page-about .about-fact-item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border-color);
}
.page-about .about-fact-item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}
.page-about .about-fact-item dt {
  color: var(--text-secondary);
  font-size: 13px;
  letter-spacing: 0.5px;
  white-space: nowrap;
}
.page-about .about-fact-item dd {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  text-align: right;
}
.page-about .about-fact-num {
  font-family: var(--font-mono);
  font-weight: 700;
}
.page-about .about-fact-num--green {
  color: var(--accent-green);
}
.page-about .about-fact-num--orange {
  color: var(--accent-orange);
}

/* ---------- Hero 数据条带 ---------- */
.page-about .about-stat-strip {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--border-color);
  border: 1px solid var(--border-color);
  margin-top: 48px;
}
.page-about .about-stat {
  background: var(--bg-secondary);
  padding: 22px 14px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  text-align: center;
}
.page-about .about-stat .data-num {
  margin: 0;
}
.page-about .about-stat:last-child {
  grid-column: 1 / -1;
}

/* ---------- 02 发展里程碑 ---------- */
.page-about .about-milestones {
  position: relative;
  padding: 72px 0;
  background: var(--bg-secondary);
  overflow: hidden;
}
.page-about .about-milestones::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-green) 38%, transparent 78%);
}
.page-about .about-milestones::after {
  content: "";
  position: absolute;
  right: -120px;
  top: 120px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 200, 255, 0.1), transparent 68%);
  pointer-events: none;
}
.page-about .about-milestones .container {
  position: relative;
  z-index: 1;
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0 0 40px;
  padding: 0;
  display: grid;
  gap: 0;
}
.page-about .about-timeline-item {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  gap: 20px;
  position: relative;
}
.page-about .about-timeline-item:not(:last-child) {
  padding-bottom: 32px;
}
.page-about .about-timeline-rail {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding-top: 8px;
  position: relative;
}
.page-about .about-timeline-rail::after {
  content: "";
  position: absolute;
  top: 52px;
  bottom: -32px;
  width: 2px;
  background: linear-gradient(180deg, var(--accent-blue), var(--accent-green));
  opacity: 0.55;
}
.page-about .about-timeline-item:last-child .about-timeline-rail::after {
  display: none;
}
.page-about .about-timeline-version {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 17px;
  color: var(--text-primary);
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  padding: 4px 10px;
  letter-spacing: 0.5px;
  white-space: nowrap;
}
.page-about .about-timeline-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent-blue);
  box-shadow: 0 0 0 4px rgba(0, 200, 255, 0.16);
  flex: none;
}
.page-about .about-timeline-item--v2 .about-timeline-dot {
  background: var(--accent-green);
  box-shadow: 0 0 0 4px rgba(57, 255, 20, 0.16);
}
.page-about .about-timeline-item--v3 .about-timeline-dot {
  background: var(--accent-orange);
  box-shadow: 0 0 0 4px rgba(255, 140, 0, 0.16);
}
.page-about .about-timeline-item--v4 .about-timeline-dot {
  background: var(--accent-green);
  box-shadow: 0 0 0 6px rgba(57, 255, 20, 0.2);
}
.page-about .about-timeline-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-left: 3px solid var(--accent-blue);
  padding: 22px 20px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.page-about .about-timeline-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-float);
}
.page-about .about-timeline-item--v2 .about-timeline-card {
  border-left-color: var(--accent-green);
}
.page-about .about-timeline-item--v3 .about-timeline-card {
  border-left-color: var(--accent-orange);
}
.page-about .about-timeline-item--v4 .about-timeline-card {
  border-left-color: var(--accent-green);
  background:
    linear-gradient(135deg, rgba(57, 255, 20, 0.08), rgba(15, 23, 38, 0) 45%),
    var(--bg-panel);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}
.page-about .about-timeline-card h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
}
.page-about .about-timeline-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-secondary);
}

/* ---------- 配图说明牌 ---------- */
.page-about .about-milestone-figure,
.page-about .about-data-figure,
.page-about .about-team-figure {
  margin: 40px 0 0;
}
.page-about .about-milestone-figure figcaption,
.page-about .about-data-figure figcaption,
.page-about .about-team-figure figcaption {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 13px;
  letter-spacing: 0.4px;
  line-height: 1.5;
}

/* ---------- 03 数据支柱 ---------- */
.page-about .about-data {
  position: relative;
  padding: 72px 0;
  background: var(--bg-deep);
  overflow: hidden;
}
.page-about .about-data::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent 10%, var(--accent-green) 45%, var(--accent-blue) 90%);
}
.page-about .about-filter-bar {
  margin: 0 0 28px;
}
.page-about .about-data-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
.page-about .about-data-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: relative;
  box-shadow: var(--shadow-card);
  transition: transform 0.3s var(--ease), background-color 0.3s var(--ease);
}
.page-about .about-data-card:hover {
  transform: translateY(-4px);
}
.page-about .about-data-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--accent-blue);
  opacity: 0.85;
}
.page-about .about-data-card--live::before {
  background: var(--accent-green);
}
.page-about .about-data-card--sync::before {
  background: var(--accent-blue);
}
.page-about .about-data-card--coverage::before {
  background: var(--accent-orange);
}
.page-about .about-data-card h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
}
.page-about .about-data-card p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.7;
}
.page-about .about-data-meta {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
}
.page-about .about-data-figure {
  margin-top: 48px;
}

/* ---------- 04 团队与文化 ---------- */
.page-about .about-team {
  position: relative;
  padding: 72px 0;
  background: var(--bg-secondary);
  overflow: hidden;
}
.page-about .about-team::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-orange), transparent 45%);
}
.page-about .about-team .container {
  position: relative;
  z-index: 1;
}
.page-about .about-team-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-bottom: 40px;
}
.page-about .about-team-roles {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
.page-about .about-team-role {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  padding: 32px 20px 26px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  box-shadow: var(--shadow-card);
  transition: transform 0.3s var(--ease);
}
.page-about .about-team-role:hover {
  transform: translateY(-4px);
}
.page-about .about-team-ico {
  width: 64px;
  height: 64px;
  border-radius: 20px;
  transform: rotate(-6deg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--accent-blue);
  background: rgba(0, 200, 255, 0.1);
  border: 1px solid rgba(0, 200, 255, 0.35);
}
.page-about .about-team-ico svg {
  width: 28px;
  height: 28px;
  transform: rotate(6deg);
}
.page-about .about-team-ico--green {
  color: var(--accent-green);
  background: rgba(57, 255, 20, 0.08);
  border-color: rgba(57, 255, 20, 0.3);
}
.page-about .about-team-ico--orange {
  color: var(--accent-orange);
  background: rgba(255, 140, 0, 0.08);
  border-color: rgba(255, 140, 0, 0.3);
}
.page-about .about-team-role h3 {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
}
.page-about .about-team-role p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
}
.page-about .about-team-culture {
  position: relative;
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  padding: 28px 24px;
  overflow: hidden;
}
.page-about .about-team-culture::after {
  content: "04";
  position: absolute;
  right: 8px;
  bottom: -16px;
  font-family: var(--font-mono);
  font-size: 88px;
  font-weight: 700;
  line-height: 1;
  color: rgba(0, 200, 255, 0.08);
  pointer-events: none;
}
.page-about .about-team-culture h3 {
  margin: 0 0 12px;
  font-size: 19px;
  font-weight: 700;
  color: var(--text-primary);
}
.page-about .about-team-culture ul {
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-team-culture li {
  position: relative;
  padding: 13px 0 13px 24px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.7;
}
.page-about .about-team-culture li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}
.page-about .about-team-culture li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 21px;
  width: 8px;
  height: 8px;
  transform: rotate(45deg);
  background: var(--accent-green);
}
.page-about .about-team-culture strong {
  color: var(--text-primary);
}

/* ---------- 05 服务承诺 ---------- */
.page-about .about-promise {
  position: relative;
  padding: 72px 0 64px;
  background:
    var(--about-blue-glow),
    var(--about-green-glow),
    var(--bg-deep);
}
.page-about .about-promise::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-green) 55%, var(--accent-orange));
}
.page-about .about-promise .container {
  position: relative;
  z-index: 1;
}
.page-about .about-promise-list {
  list-style: none;
  margin: 0 0 36px;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
.page-about .about-promise-item {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  padding: 28px 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: relative;
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.3s var(--ease);
}
.page-about .about-promise-item:hover {
  box-shadow: var(--shadow-float);
}
.page-about .about-promise-num {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--accent-orange);
  letter-spacing: 1px;
}
.page-about .about-promise-item h3 {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
}
.page-about .about-promise-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--text-secondary);
}
.page-about .about-promise-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 44px;
}
.page-about .about-trust {
  margin: 0;
  padding: 24px;
  border: 1px solid var(--border-color);
  border-left: 3px solid var(--accent-green);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.8;
}

/* ---------- 响应式栅格 ---------- */
@media (min-width: 640px) {
  .page-about .about-team-roles {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about .about-data-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-about .about-promise-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 768px) {
  .page-about .about-stat-strip {
    grid-template-columns: repeat(5, 1fr);
    margin-top: 64px;
  }
  .page-about .about-stat:last-child {
    grid-column: auto;
  }
}

@media (min-width: 920px) {
  .page-about .about-hero-layout {
    grid-template-columns: minmax(0, 7fr) minmax(280px, 4fr);
    gap: 56px;
  }
  .page-about .about-team-layout {
    grid-template-columns: minmax(0, 6fr) minmax(300px, 4fr);
    gap: 44px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 24px;
    position: relative;
  }
  .page-about .about-timeline::before {
    content: "";
    position: absolute;
    top: 30px;
    left: 6px;
    right: 6px;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-blue) 4%, var(--accent-green) 40%, var(--accent-orange) 72%, var(--accent-green));
    opacity: 0.7;
  }
  .page-about .about-timeline-item {
    display: block;
    padding: 0;
  }
  .page-about .about-timeline-rail {
    flex-direction: row;
    justify-content: flex-start;
    gap: 10px;
    height: 60px;
    padding-top: 0;
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
  }
  .page-about .about-timeline-rail::after {
    display: none;
  }
  .page-about .about-timeline-card {
    height: 100%;
  }
  .page-about .about-data-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}