/* ===== 品牌概况 页面专属样式 ===== */
.page-about {
  --about-index-w: 240px;
  --about-ink: #121212;
  --about-paper: #F5F7FA;
  --about-neon: #00FF88;
  --about-deep: #0B1F3A;
  --about-orange: #FF6B2C;
  --about-blue: #1E4A6F;
  background: var(--about-paper);
  color: var(--about-ink);
  line-height: 1.7;
  overflow-x: hidden;
}

.page-about .container {
  width: min(var(--max-w), 100% - 2 * var(--pad));
  margin-inline: auto;
}

.page-about .section-head {
  margin-bottom: clamp(2rem, 5vw, 3.25rem);
}

.page-about .section-label {
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-orange, #FF6B2C);
  margin: 0 0 0.6rem;
}

.page-about .section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.05;
  margin: 0;
  color: var(--about-deep);
}

.page-about .section-subtitle {
  font-size: 1.06rem;
  color: #4a5260;
  margin: 1rem 0 0;
  max-width: 46rem;
}

/* ===== 首屏 ===== */
.page-about .about-hero {
  background:
    linear-gradient(135deg, rgba(11, 31, 58, 0.92) 0%, rgba(11, 31, 58, 0.78) 55%, rgba(30, 74, 111, 0.7) 100%),
    repeating-linear-gradient(45deg, transparent 0 22px, rgba(0, 255, 136, 0.05) 22px 23px),
    var(--about-deep);
  color: var(--about-paper);
  padding: clamp(2.5rem, 7vw, 5rem) 0 3.5rem;
  border-bottom: 6px solid var(--about-neon);
  position: relative;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 8px;
  background: linear-gradient(90deg, var(--about-neon) 0 42%, var(--about-orange) 42% 58%, transparent 58% 100%);
  opacity: 0.7;
}

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

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.82rem;
  color: rgba(245, 247, 250, 0.72);
  margin-bottom: clamp(2rem, 5vw, 3.2rem);
}

.page-about .breadcrumb a {
  color: var(--about-neon);
  text-decoration: none;
  font-weight: 700;
}

.page-about .breadcrumb a:hover {
  color: #fff;
}

.page-about .about-hero__layout {
  display: grid;
  gap: 2.5rem;
  grid-template-columns: 1fr;
}

.page-about .about-hero__copy {
  max-width: 40rem;
}

.page-about .about-hero__copy .section-label {
  color: var(--about-neon);
}

.page-about .about-hero__title {
  font-size: clamp(2.2rem, 6vw, 4rem);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 0.2rem 0 1.2rem;
  color: #fff;
}

.page-about .about-hero__lead {
  font-size: clamp(1rem, 2vw, 1.18rem);
  color: rgba(245, 247, 250, 0.86);
  margin: 0 0 1.8rem;
  max-width: 34rem;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.page-about .about-hero__visual {
  margin-inline: auto;
  width: 100%;
  max-width: 580px;
  border: 2px solid var(--about-neon);
  transform: rotate(0.6deg);
  box-shadow: 14px 14px 0 rgba(0, 255, 136, 0.15);
}

.page-about .about-hero__visual img {
  filter: saturate(0.85) contrast(1.05);
}

/* ===== 主体壳 ===== */
.page-about .about-shell {
  padding-top: clamp(2.5rem, 6vw, 5rem);
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}

.page-about .about-pages {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: clamp(4rem, 9vw, 7rem);
}

.page-about .about-section {
  scroll-margin-top: calc(var(--header-total) + 1rem);
}

/* ===== 章节索引 ===== */
.page-about .about-index {
  display: none;
}

/* ===== 01 我们是谁 ===== */
.page-about .about-who__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: stretch;
}

.page-about .about-para {
  background: #fff;
  border: 1px solid #e6e9ef;
  border-left: 6px solid var(--about-deep);
  padding: clamp(1.4rem, 3vw, 2rem);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  box-shadow: 8px 8px 0 #edf0f5;
}

.page-about .about-para p {
  margin: 0;
  font-size: 1rem;
  color: #2b2f36;
}

.page-about .about-para .btn {
  align-self: flex-start;
  margin-top: 0.4rem;
}

.page-about .about-who__score {
  background:
    linear-gradient(135deg, rgba(11, 31, 58, 0.96), rgba(30, 74, 111, 0.85)),
    repeating-linear-gradient(0deg, transparent 0 38px, rgba(255, 255, 255, 0.05) 38px 40px);
  color: var(--about-paper);
  padding: clamp(1.4rem, 3vw, 2rem);
  border: 1px solid var(--about-deep);
  border-right: 6px solid var(--about-orange);
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.page-about .about-who__score::before {
  content: "LIVE";
  position: absolute;
  right: -0.4rem;
  top: 0.8rem;
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.2em;
  color: var(--about-neon);
  transform: rotate(90deg);
  opacity: 0.85;
}

.page-about .about-who__score-title {
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--about-neon);
  margin: 0 0 1rem;
}

.page-about .about-who__score-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.page-about .about-who__score-list li {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.92rem;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.2);
  padding-bottom: 0.8rem;
}

.page-about .about-who__score-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-who__score-time {
  font-weight: 900;
  color: var(--about-orange);
  font-size: 0.8rem;
}

/* ===== 02 数据档案 ===== */
.page-about .about-data {
  position: relative;
}

.page-about .stats-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.2rem;
}

.page-about .stat-card {
  background: var(--about-deep);
  color: var(--about-paper);
  padding: clamp(1.4rem, 3vw, 2rem);
  border: 1px solid rgba(255, 255, 255, 0.08);
  position: relative;
  overflow: hidden;
  min-height: 180px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
}

.page-about .stat-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0, 255, 136, 0.08) 0%, transparent 38%);
  pointer-events: none;
}

.page-about .stat-card::after {
  content: "";
  position: absolute;
  width: 6px;
  height: 6px;
  background: var(--about-neon);
  top: 16px;
  right: 18px;
  box-shadow: 0 0 12px rgba(0, 255, 136, 0.9);
}

.page-about .stat-card__index {
  position: absolute;
  top: 0.9rem;
  left: 1rem;
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.16em;
  color: var(--about-orange);
}

.page-about .stat-card__num {
  font-size: clamp(2.6rem, 6vw, 3.8rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.03em;
  margin: 0;
  color: var(--about-neon);
}

.page-about .stat-card__unit {
  font-size: 1.2rem;
  color: rgba(245, 247, 250, 0.75);
  margin-left: 0.2rem;
  font-weight: 700;
}

.page-about .stat-card__label {
  font-size: 1rem;
  font-weight: 800;
  margin: 0.7rem 0 0.3rem;
  color: #fff;
}

.page-about .stat-card__desc {
  font-size: 0.85rem;
  color: rgba(245, 247, 250, 0.68);
  margin: 0;
}

/* ===== 03 发展历程 ===== */
.page-about .about-timeline {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

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

.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
}

.page-about .timeline-item {
  position: relative;
  padding: 0 0 1.2rem 2.8rem;
  border-left: 3px solid var(--about-deep);
  margin-left: 1rem;
}

.page-about .timeline-item:last-child {
  border-left: 3px solid transparent;
}

.page-about .timeline-item__dot {
  position: absolute;
  left: -1.05rem;
  top: 0.1rem;
  width: 1.8rem;
  height: 1.8rem;
  border-radius: 50%;
  background: var(--about-deep);
  color: var(--about-neon);
  font-weight: 900;
  font-size: 0.78rem;
  display: grid;
  place-items: center;
  border: 3px solid var(--about-paper);
  box-shadow: 0 0 0 3px var(--about-deep);
  cursor: pointer;
  transition: background 0.2s, color 0.2s, transform 0.2s;
}

.page-about .timeline-item__dot:hover,
.page-about .timeline-item__dot:focus-visible {
  background: var(--about-orange);
  color: var(--about-deep);
  transform: scale(1.1);
  outline: none;
}

.page-about .timeline-item__panel {
  background: #fff;
  border: 1px solid #e6e9ef;
  border-top: 4px solid var(--about-neon);
  padding: clamp(1.2rem, 3vw, 1.6rem);
  margin-bottom: 1rem;
}

.page-about .timeline-item__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.5rem;
}

.page-about .timeline-item__phase {
  font-size: 0.82rem;
  font-weight: 700;
  color: #6b7280;
}

.page-about .timeline-item h3 {
  font-size: 1.2rem;
  font-weight: 900;
  margin: 0.3rem 0 0.4rem;
  color: var(--about-deep);
}

.page-about .timeline-item p {
  margin: 0;
  font-size: 0.92rem;
  color: #3d4248;
}

.page-about .about-timeline__media {
  border: 2px solid var(--about-deep);
  width: 100%;
  max-width: 360px;
  margin-left: auto;
}

/* ===== 04 资质与合作 ===== */
.page-about .about-qulity {
  background:
    linear-gradient(180deg, rgba(11, 31, 58, 0.06) 0%, rgba(11, 31, 58, 0.02) 100%);
  border-top: 2px solid var(--about-neon);
  border-bottom: 2px solid var(--about-neon);
  padding: clamp(2.5rem, 6vw, 4rem) 0;
  margin-inline: calc(-1 * var(--pad));
  padding-inline: var(--pad);
}

.page-about .about-qulity__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.page-about .about-cert__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.page-about .about-cert__list li {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  background: #fff;
  border: 1px solid #e2e6ec;
  border-left: 6px solid var(--about-orange);
  padding: 1.2rem 1.2rem;
}

.page-about .about-cert__icon {
  flex: 0 0 auto;
  width: 3rem;
  height: 3rem;
  background: var(--about-deep);
  color: var(--about-neon);
  font-size: 0.78rem;
  font-weight: 900;
  display: grid;
  place-items: center;
  letter-spacing: 0.02em;
  text-align: center;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
}

.page-about .about-cert__list h3 {
  font-size: 1.06rem;
  font-weight: 900;
  margin: 0 0 0.3rem;
  color: var(--about-deep);
}

.page-about .about-cert__list p {
  margin: 0;
  font-size: 0.88rem;
  color: #4d545d;
}

.page-about .about-partner {
  background: var(--about-deep);
  color: var(--about-paper);
  padding: clamp(1.4rem, 3vw, 2rem);
  border: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.page-about .about-partner .media-frame {
  border: 2px solid rgba(0, 255, 136, 0.55);
}

.page-about .about-partner h3 {
  font-size: 1.2rem;
  font-weight: 900;
  margin: 0.4rem 0 0;
  color: #fff;
}

.page-about .about-partner p {
  margin: 0;
  font-size: 0.92rem;
  color: rgba(245, 247, 250, 0.8);
}

/* ===== 05 团队理念 ===== */
.page-about .about-team__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.page-about .about-team__cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.2rem;
}

.page-about .about-team__card {
  background: #fff;
  border: 1px solid #e6e9ef;
  border-bottom: 4px solid var(--about-neon);
  padding: 1.4rem 1.4rem 1.6rem;
  position: relative;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.page-about .about-team__card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(11, 31, 58, 0.1);
}

.page-about .about-team__num {
  position: absolute;
  right: 1rem;
  top: 0.8rem;
  font-size: 2.6rem;
  font-weight: 900;
  line-height: 1;
  color: rgba(11, 31, 58, 0.09);
}

.page-about .about-team__card h3 {
  font-size: 1.2rem;
  font-weight: 900;
  margin: 0 0 0.45rem;
  color: var(--about-deep);
}

.page-about .about-team__card p {
  margin: 0;
  font-size: 0.92rem;
  color: #4d545d;
}

.page-about .about-team__media {
  border: 2px solid var(--about-orange);
}

/* ===== 主题索引 ===== */
.page-about .about-directory {
  scroll-margin-top: calc(var(--header-total) + 1rem);
  border-top: 2px solid var(--about-deep);
  padding-top: 2.5rem;
}

.page-about .directory-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.2rem;
  margin-top: 2rem;
}

.page-about .topic-card {
  background: #fff;
  border: 2px solid var(--about-deep);
  padding: clamp(1.4rem, 3vw, 2rem);
  text-decoration: none;
  color: var(--about-deep);
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  position: relative;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.page-about .topic-card:hover {
  transform: translateX(6px);
  border-color: var(--about-orange);
}

.page-about .topic-card h3 {
  font-size: 1.4rem;
  font-weight: 900;
  margin: 0;
}

.page-about .topic-card p {
  margin: 0;
  font-size: 0.92rem;
  color: #4d545d;
}

.page-about .topic-card__arrow {
  position: absolute;
  right: 1.2rem;
  top: 1.2rem;
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--about-orange);
}

.page-about .topic-card--contact {
  background: var(--about-deep);
  color: var(--about-paper);
}

.page-about .topic-card--contact p {
  color: rgba(245, 247, 250, 0.78);
}

.page-about .topic-card--contact .tag {
  background: var(--about-neon);
  color: var(--about-deep);
  border-color: var(--about-neon);
}

/* ===== 动效与可见性 ===== */
.page-about [data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.page-about [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-about .stat-card,
  .page-about .topic-card:hover,
  .page-about .about-team__card:hover {
    transition: none;
  }
}

/* ===== 平板 ===== */
@media (min-width: 640px) {
  .page-about .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .page-about .about-hero__layout {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
  }

  .page-about .about-hero__visual {
    margin-inline: 0;
    max-width: none;
  }

  .page-about .about-who__grid {
    grid-template-columns: 1fr 0.9fr;
  }
}

/* ===== 桌面：框架式侧栏 ===== */
@media (min-width: 960px) {
  .page-about .about-shell {
    grid-template-columns: var(--about-index-w) 1fr;
    gap: clamp(2.5rem, 5vw, 4.5rem);
    align-items: start;
  }

  .page-about .about-index {
    display: block;
    position: sticky;
    top: calc(var(--header-total) + 1.6rem);
    z-index: 5;
  }

  .page-about .about-index__inner {
    border-left: 3px solid var(--about-deep);
    padding: 0.4rem 0 0.4rem 1.2rem;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
  }

  .page-about .about-index__label {
    font-size: 0.72rem;
    font-weight: 900;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--about-orange);
    margin: 0 0 0.4rem;
  }

  .page-about .about-index__link {
    font-size: 0.92rem;
    font-weight: 700;
    color: var(--about-ink);
    text-decoration: none;
    padding: 0.35rem 0.5rem;
    border-left: 3px solid transparent;
    margin-left: -1.35rem;
    transition: background 0.2s, color 0.2s, border-color 0.2s;
  }

  .page-about .about-index__link:hover,
  .page-about .about-index__link:focus-visible {
    background: var(--about-neon);
    color: var(--about-deep);
    border-color: var(--about-orange);
    outline: none;
  }

  .page-about .about-qulity {
    margin-inline: 0;
    padding-inline: 0;
  }

  .page-about .about-qulity__grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }

  .page-about .about-timeline {
    grid-template-columns: 1fr;
  }

  .page-about .about-timeline__media {
    max-width: 400px;
  }

  .page-about .about-team__layout {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: start;
  }

  .page-about .about-team__cards {
    grid-template-columns: 1fr;
  }

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

/* ===== 宽屏 ===== */
@media (min-width: 1280px) {
  .page-about .about-timeline {
    grid-template-columns: 1fr 360px;
    gap: 3rem;
  }

  .page-about .about-timeline__media {
    max-width: none;
    margin-left: 0;
    align-self: start;
  }
}