/* ===== 品牌故事页专属样式 ===== */
.page-about {
  --p-about-bg-deep: #142D47;
  --p-about-card-border: rgba(255, 255, 255, 0.65);
  --p-about-glass-bg: rgba(255, 253, 247, 0.72);
  --p-about-rule: rgba(27, 58, 92, 0.1);
  position: relative;
}

.page-about .glass-card {
  background: var(--p-about-glass-bg);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border: 1px solid var(--p-about-card-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

/* ---- Hero 首屏 ---- */
.page-about .about-hero {
  position: relative;
  padding: 48px 0 40px;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -80px;
  right: -60px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(198, 255, 0, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(-45deg, transparent 0px, transparent 14px, rgba(27, 58, 92, 0.025) 14px, rgba(27, 58, 92, 0.025) 15px);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: center;
}

.page-about .about-hero__kicker {
  margin-bottom: 12px;
  color: var(--accent);
}

.page-about .about-hero__title {
  margin-bottom: 16px;
  font-size: clamp(2.6rem, 9vw, 4.2rem);
}

.page-about .about-hero__lead {
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-muted);
  margin-bottom: 24px;
  max-width: 34ch;
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.page-about .about-hero__meta span {
  position: relative;
  padding-left: 16px;
}

.page-about .about-hero__meta span::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 7px;
  height: 7px;
  background: var(--green);
  transform: translateY(-50%);
}

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

.page-about .about-hero__svg {
  width: 100%;
  height: auto;
  display: block;
}

/* ---- 我们的起点 ---- */
.page-about .about-origin {
  padding: 64px 0 56px;
}

.page-about .about-origin__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  align-items: start;
}

.page-about .about-origin__text .display-title {
  margin: 12px 0 20px;
}

.page-about .about-origin__paragraph {
  margin-bottom: 16px;
  max-width: 60ch;
  color: var(--text-muted);
}

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

.page-about .about-origin__card {
  background: rgba(27, 58, 92, 0.05);
  border: 1px solid var(--p-about-rule);
  border-radius: var(--radius);
  padding: 28px;
  position: relative;
  overflow: hidden;
}

.page-about .about-origin__card::after {
  content: "4.0";
  position: absolute;
  right: -12px;
  bottom: -18px;
  font-family: var(--font-mono);
  font-size: 96px;
  font-weight: 700;
  color: rgba(27, 58, 92, 0.05);
  pointer-events: none;
}

.page-about .about-origin__card-index {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}

.page-about .about-origin__version-list {
  list-style: none;
  padding: 0;
  margin: 0;
  position: relative;
  z-index: 1;
}

.page-about .about-origin__version-list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 12px 0;
  border-bottom: 1px dashed rgba(27, 58, 92, 0.14);
}

.page-about .about-origin__version-list li:last-child {
  border-bottom: none;
}

.page-about .version-num {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--bg-dark);
}

.page-about .version-desc {
  font-size: 14px;
  color: var(--text);
}

/* ---- 里程碑时间轴 ---- */
.page-about .about-timeline {
  position: relative;
  padding: 56px 0 72px;
  overflow: hidden;
}

.page-about .about-timeline::after {
  content: "2:1\A 3:2\A 1:0\A 88'";
  white-space: pre;
  position: absolute;
  right: 8px;
  top: 96px;
  font-family: var(--font-mono);
  font-size: 72px;
  line-height: 1.2;
  color: rgba(27, 58, 92, 0.045);
  pointer-events: none;
  z-index: 0;
}

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

.page-about .about-timeline__head {
  margin-bottom: 44px;
}

.page-about .about-timeline__head .display-title {
  margin-top: 12px;
}

.page-about .about-timeline__list {
  position: relative;
  padding-left: 0;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background: linear-gradient(180deg, var(--accent) 0%, var(--border) 100%);
  border-radius: 2px;
}

.page-about .timeline-item {
  position: relative;
  padding-left: 44px;
  margin-bottom: 40px;
}

.page-about .timeline-item:last-child {
  margin-bottom: 0;
}

.page-about .timeline-item::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 18px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--bg-card);
  box-shadow: 0 0 0 2px rgba(232, 93, 61, 0.4);
  transition: transform 0.25s ease, background 0.25s ease;
}

.page-about .timeline-item:hover::before {
  transform: scale(1.25);
  background: var(--violet);
  box-shadow: 0 0 0 3px rgba(123, 47, 247, 0.3);
}

.page-about .timeline-item__card {
  padding: 22px 22px 20px;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.page-about .timeline-item:hover .timeline-item__card {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(123, 47, 247, 0.3);
}

.page-about .timeline-item__top {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.page-about .timeline-item__icon {
  color: var(--accent);
  flex-shrink: 0;
}

.page-about .timeline-item:hover .timeline-item__icon {
  color: var(--violet);
}

.page-about .timeline-item__year {
  display: inline-block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--bg-dark);
  background: var(--green);
  border-radius: 4px;
  padding: 3px 10px;
}

.page-about .timeline-item__title {
  font-family: var(--font-display);
  font-size: 17px;
  line-height: 1.45;
  margin-bottom: 8px;
  color: var(--text);
}

.page-about .timeline-item__text {
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-muted);
  margin: 0;
}

/* ---- 服务能力 ---- */
.page-about .about-capacity {
  padding: 64px 0;
  background: linear-gradient(180deg, var(--bg-card) 0%, #F0ECDF 100%);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.page-about .about-capacity__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  align-items: center;
}

.page-about .about-capacity__content .display-title {
  margin: 12px 0 18px;
}

.page-about .about-capacity__lead {
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 28px;
  max-width: 58ch;
}

.page-about .about-capacity__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-bottom: 24px;
}

.page-about .stat-item {
  background: rgba(255, 255, 255, 0.6);
  border-left: 3px solid var(--accent);
  border-radius: 0 10px 10px 0;
  padding: 16px 14px;
  box-shadow: var(--shadow-sm);
}

.page-about .stat-item:nth-child(2) {
  border-left-color: var(--violet);
}

.page-about .stat-item:nth-child(3) {
  border-left-color: var(--bg-dark);
}

.page-about .stat-item:nth-child(4) {
  border-left-color: var(--green);
}

.page-about .stat-item__num {
  display: block;
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-about .stat-item__label {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

.page-about .about-capacity__note {
  font-size: 13px;
  color: var(--text-muted);
  border-left: 2px solid var(--border);
  padding-left: 14px;
  line-height: 1.7;
}

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

.page-about .about-capacity__img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  display: block;
  object-fit: cover;
}

/* ---- 团队构成 ---- */
.page-about .about-team {
  padding: 64px 0;
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  align-items: center;
}

.page-about .about-team__img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  display: block;
  object-fit: cover;
}

.page-about .about-team__content .display-title {
  margin: 12px 0 18px;
}

.page-about .about-team__lead {
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 28px;
  max-width: 56ch;
}

.page-about .about-team__roles {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-about .role-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: rgba(255, 255, 255, 0.45);
  border: 1px solid rgba(200, 214, 229, 0.5);
  border-radius: 12px;
  padding: 18px 16px;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.page-about .role-item:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

.page-about .role-item__index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 8px 2px 8px 2px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.page-about .role-item__index--accent {
  background: var(--accent);
}

.page-about .role-item__index--violet {
  background: var(--violet);
}

.page-about .role-item__index--dark {
  background: var(--bg-dark);
}

.page-about .role-item__title {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 900;
  margin-bottom: 4px;
}

.page-about .role-item__text {
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-muted);
  margin: 0;
}

/* ---- 资质与认证 ---- */
.page-about .about-credentials {
  padding: 64px 0;
  background: linear-gradient(0deg, var(--bg-card) 0%, rgba(245, 241, 232, 0.4) 100%);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.page-about .about-credentials__head {
  margin-bottom: 36px;
}

.page-about .about-credentials__head .display-title {
  margin-top: 12px;
}

.page-about .about-credentials__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  align-items: center;
}

.page-about .about-credentials__list {
  display: flex;
  flex-direction: column;
}

.page-about .credential-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 20px 0;
  border-bottom: 1px solid var(--p-about-rule);
}

.page-about .credential-item:first-child {
  padding-top: 0;
}

.page-about .credential-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.page-about .credential-item__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  background: var(--bg-dark);
  color: var(--on-dark);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  border-radius: 10px 2px 10px 2px;
  flex-shrink: 0;
}

.page-about .credential-item:nth-child(2) .credential-item__icon {
  background: var(--violet);
}

.page-about .credential-item:nth-child(3) .credential-item__icon {
  background: var(--accent);
}

.page-about .credential-item:nth-child(4) .credential-item__icon {
  background: var(--bg-dark-2);
}

.page-about .credential-item__text strong {
  display: block;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 900;
  margin-bottom: 4px;
}

.page-about .credential-item__text p {
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-muted);
  margin: 0;
  max-width: 52ch;
}

.page-about .about-credentials__img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  display: block;
  object-fit: cover;
}

/* ---- 品牌愿景 ---- */
.page-about .about-vision {
  position: relative;
  padding: 72px 0 64px;
  background: var(--bg-dark);
  overflow: hidden;
}

.page-about .about-vision::before {
  content: "FINAL SCORE";
  position: absolute;
  right: -24px;
  bottom: 10px;
  font-family: var(--font-mono);
  font-size: 72px;
  font-weight: 700;
  color: rgba(245, 241, 232, 0.04);
  white-space: nowrap;
  transform: rotate(-6deg);
  pointer-events: none;
}

.page-about .about-vision__inner {
  position: relative;
  z-index: 1;
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.page-about .about-vision__kicker {
  color: var(--green);
  margin-bottom: 12px;
}

.page-about .about-vision__title {
  color: var(--on-dark);
  margin-bottom: 20px;
}

.page-about .about-vision__lead {
  color: var(--on-dark-muted);
  font-size: 15px;
  line-height: 1.85;
  margin-bottom: 32px;
}

.page-about .about-vision__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
  margin-bottom: 28px;
}

.page-about .about-vision__note {
  font-size: 13px;
  color: rgba(245, 241, 232, 0.55);
  margin: 0;
  line-height: 1.7;
  max-width: 48ch;
  margin-left: auto;
  margin-right: auto;
}

/* ---- 响应式：桌面端 ---- */
@media (min-width: 768px) {
  .page-about .about-hero {
    padding: 64px 0 56px;
  }

  .page-about .about-hero__inner {
    gap: 48px;
  }

  .page-about .about-capacity__stats {
    gap: 20px;
  }

  .page-about .timeline-item__card {
    padding: 26px 28px 24px;
  }
}

@media (min-width: 992px) {
  .page-about .about-hero {
    padding: 80px 0 64px;
  }

  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 64px;
    min-height: 480px;
  }

  .page-about .about-hero__lead {
    font-size: 18px;
  }

  .page-about .about-origin {
    padding: 88px 0 72px;
  }

  .page-about .about-origin__inner {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    gap: 72px;
  }

  .page-about .about-timeline {
    padding: 72px 0 96px;
  }

  .page-about .about-timeline__head {
    margin-bottom: 64px;
  }

  .page-about .about-timeline__list::before {
    left: 50%;
    transform: translateX(-1px);
  }

  .page-about .timeline-item {
    width: 50%;
    padding-left: 0;
    padding-right: 56px;
    margin-bottom: 56px;
    text-align: right;
  }

  .page-about .timeline-item::before {
    left: auto;
    right: -9px;
    top: 22px;
  }

  .page-about .timeline-item:nth-child(even) {
    margin-left: 50%;
    padding-right: 0;
    padding-left: 56px;
    text-align: left;
  }

  .page-about .timeline-item:nth-child(even)::before {
    right: auto;
    left: -9px;
  }

  .page-about .timeline-item__top {
    justify-content: flex-end;
  }

  .page-about .timeline-item:nth-child(even) .timeline-item__top {
    justify-content: flex-start;
  }

  .page-about .about-capacity {
    padding: 88px 0;
  }

  .page-about .about-capacity__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 72px;
  }

  .page-about .about-team {
    padding: 88px 0;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: 72px;
  }

  .page-about .about-credentials {
    padding: 88px 0;
  }

  .page-about .about-credentials__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    gap: 72px;
  }

  .page-about .about-vision {
    padding: 100px 0 88px;
  }

  .page-about .about-vision__lead {
    font-size: 16px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-hero__lead {
    font-size: 19px;
  }

  .page-about .about-timeline__head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
  }

  .page-about .about-timeline__head .label-index {
    margin-bottom: 12px;
  }
}