.page-about {
  --about-toc-w: 210px;
}

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

/* 面包屑 */
.page-about .about-breadcrumb {
  padding-top: 24px;
}

.page-about .about-breadcrumb .breadcrumb {
  margin: 0;
}

/* 首屏杂志封面 */
.page-about .about-hero {
  position: relative;
  display: grid;
  gap: 24px;
  padding: 36px 0 44px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(-45deg, transparent 0 14px, rgba(255, 255, 255, 0.02) 14px 15px);
  pointer-events: none;
}

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

.page-about .about-hero__kicker {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 16px;
}

.page-about .about-hero h1 {
  font-size: clamp(36px, 7vw, 58px);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0 0 18px;
  color: var(--text-main);
}

.page-about .about-hero__lead {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-dim);
  max-width: 560px;
  margin: 0;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-hero__figure {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-panel);
  border: 1px solid var(--line);
}

.page-about .about-hero__figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.page-about .about-hero__stat {
  background: linear-gradient(135deg, var(--bg-panel), var(--bg-raised));
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: 2px 10px 2px 10px;
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.page-about .about-hero__stat-num {
  font-size: 24px;
  font-weight: 900;
  line-height: 1.1;
  color: var(--text-main);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.page-about .about-hero__stat-label {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--text-dim);
}

/* 杂志双栏布局 */
.page-about .about-layout {
  padding-top: 8px;
  padding-bottom: 56px;
}

.page-about .about-article {
  min-width: 0;
  max-width: 860px;
}

/* 章节导航 */
.page-about .about-toc {
  padding: 18px 0 14px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 8px;
}

.page-about .about-toc__title {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin: 0 0 12px;
}

.page-about .about-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0 18px;
}

.page-about .about-toc__list a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 0;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-dim);
  text-decoration: none;
  border-bottom: 1px dashed rgba(42, 69, 96, 0.7);
  transition: color var(--ease), padding-left var(--ease);
}

.page-about .about-toc__list a:hover {
  color: var(--accent);
  padding-left: 4px;
}

.page-about .about-toc__num {
  font-size: 12px;
  font-weight: 900;
  color: var(--accent);
}

.page-about .about-toc__cta {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
}

.page-about .about-toc__cta p {
  font-size: 14px;
  color: var(--text-dim);
  margin: 0 0 8px;
}

.page-about .about-toc__cta a {
  display: inline-block;
  margin: 4px 14px 0 0;
  font-size: 14px;
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-color var(--ease);
}

.page-about .about-toc__cta a:hover {
  border-color: var(--accent);
}

/* 通用章节 */
.page-about .about-section {
  padding: 48px 0;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 20px;
}

.page-about .about-section:last-child {
  border-bottom: 0;
  padding-bottom: 8px;
}

.page-about .section-index {
  font-size: clamp(44px, 5vw, 64px);
  font-weight: 900;
  line-height: 1;
  letter-spacing: 0.02em;
  color: rgba(0, 212, 255, 0.16);
  -webkit-text-stroke: 1px rgba(0, 212, 255, 0.55);
  margin: 0;
}

.page-about .about-section > h2 {
  font-size: clamp(28px, 4vw, 38px);
  font-weight: 900;
  line-height: 1.2;
  margin: 10px 0 16px;
  color: var(--text-main);
}

.page-about .about-section > h2::after {
  content: "";
  display: inline-block;
  width: 44px;
  height: 4px;
  margin-left: 12px;
  background: linear-gradient(90deg, var(--accent), var(--accent-3));
  vertical-align: middle;
}

.page-about .about-section__lead {
  font-size: 17px;
  line-height: 1.7;
  color: var(--text-dim);
  margin: 0 0 24px;
  max-width: 640px;
}

.page-about .about-section__body p {
  color: var(--text-dim);
  line-height: 1.8;
  margin: 0 0 16px;
  max-width: 680px;
}

/* 品牌理念引语 */
.page-about .about-quote {
  margin: 28px 0 0;
  padding: 18px 22px;
  background: linear-gradient(135deg, var(--bg-panel), transparent);
  border-left: 4px solid var(--accent);
  border-radius: 0 10px 0 10px;
  font-size: 19px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.6;
  max-width: 640px;
}

.page-about .about-quote p {
  margin: 0;
}

/* 发展里程碑时间线 */
.page-about .about-timeline {
  margin-top: 8px;
}

.page-about .about-timeline__item {
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: 4px 14px 4px 14px;
  margin-bottom: 14px;
  transition: border-color var(--ease), box-shadow var(--ease);
}

.page-about .about-timeline__item[open] {
  border-color: rgba(0, 212, 255, 0.45);
  box-shadow: var(--shadow);
}

.page-about .about-timeline__head {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
}

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

.page-about .about-timeline__head::after {
  content: "+";
  margin-left: auto;
  font-weight: 900;
  font-size: 20px;
  line-height: 1;
  color: var(--accent-3);
  transition: transform var(--ease);
}

.page-about .about-timeline__item[open] .about-timeline__head::after {
  transform: rotate(45deg);
}

.page-about .about-timeline__marker {
  width: 10px;
  height: 10px;
  background: var(--accent-2);
  transform: rotate(45deg);
  flex-shrink: 0;
  box-shadow: 0 0 10px rgba(56, 255, 141, 0.55);
  transition: background var(--ease), box-shadow var(--ease);
}

.page-about .about-timeline__item[open] .about-timeline__marker {
  background: var(--accent);
  box-shadow: 0 0 10px rgba(255, 107, 53, 0.5);
}

.page-about .about-timeline__period {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--accent);
  border: 1px solid var(--line);
  padding: 2px 8px;
  white-space: nowrap;
}

.page-about .about-timeline__title {
  font-weight: 700;
  color: var(--text-main);
}

.page-about .about-timeline__body {
  margin: 0 18px;
  padding: 14px 0 18px;
  border-top: 1px dashed var(--line);
  color: var(--text-dim);
  line-height: 1.75;
  font-size: 15px;
}

.page-about .about-timeline__body p {
  margin: 0;
}

/* 服务能力 */
.page-about .about-capability-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.page-about .about-capability {
  padding: 18px 16px;
  background: linear-gradient(135deg, var(--bg-panel), var(--bg-raised));
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-about .about-capability__num {
  font-size: 28px;
  font-weight: 900;
  line-height: 1.1;
  color: var(--text-main);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.page-about .about-capability h3 {
  font-size: 15px;
  font-weight: 800;
  color: var(--accent);
  margin: 0;
}

.page-about .about-capability p {
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-dim);
  margin: 0;
}

.page-about .about-note {
  margin-top: 20px;
  padding: 14px 18px;
  background: rgba(56, 255, 141, 0.08);
  border: 1px solid rgba(56, 255, 141, 0.28);
  border-radius: 4px 14px 4px 14px;
  color: var(--text-dim);
  font-size: 15px;
  line-height: 1.7;
}

.page-about .about-note__label {
  display: inline-block;
  margin-right: 8px;
  font-weight: 800;
  color: var(--accent-2);
}

.page-about .about-capability-figure {
  margin: 28px 0 0;
}

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

.page-about .about-capability-figure figcaption {
  margin-top: 8px;
  padding-left: 12px;
  border-left: 2px solid var(--accent-3);
  font-size: 13px;
  color: var(--text-dim);
}

/* 团队与组织 */
.page-about .about-team-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-team-item {
  padding: 20px;
  margin: 0;
}

.page-about .about-team-item h3 {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 17px;
  font-weight: 800;
  color: var(--accent);
  margin: 0 0 10px;
}

.page-about .about-team-item h3::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--accent-3);
  transform: rotate(45deg);
  flex-shrink: 0;
}

.page-about .about-team-item p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-dim);
  margin: 0;
}

/* 资质认证 */
.page-about .about-certification {
  display: grid;
  gap: 22px;
}

.page-about .about-certification__badge {
  background: linear-gradient(135deg, var(--bg-panel), var(--bg-raised));
  border: 1px solid var(--line);
  border-top: 4px solid var(--accent-2);
  padding: 26px 24px;
  border-radius: 4px 14px 4px 14px;
}

.page-about .about-certification__level {
  display: block;
  font-size: 52px;
  font-weight: 900;
  line-height: 1;
  color: var(--accent-2);
  margin-bottom: 14px;
  letter-spacing: 0.04em;
}

.page-about .about-certification__badge h3 {
  font-size: 20px;
  font-weight: 800;
  margin: 0 0 10px;
  color: var(--text-main);
}

.page-about .about-certification__badge p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-dim);
  margin: 0;
}

.page-about .about-certification__figure {
  margin: 0;
}

.page-about .about-certification__figure img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

.page-about .about-certification__figure figcaption {
  margin-top: 8px;
  padding-left: 12px;
  border-left: 2px solid var(--accent);
  font-size: 13px;
  color: var(--text-dim);
}

/* 合作生态 */
.page-about .about-partners {
  padding: 26px 24px;
}

.page-about .about-partners h3 {
  font-size: 20px;
  font-weight: 800;
  margin: 0 0 12px;
  color: var(--text-main);
}

.page-about .about-partners p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-dim);
  margin: 0;
}

.page-about .about-partners__list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-partners__list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.6;
}

.page-about .about-partners__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 8px;
  height: 8px;
  background: var(--accent);
  transform: rotate(45deg);
}

.page-about .about-partners .btn {
  margin-top: 20px;
}

/* 平板及以上 */
@media (min-width: 768px) {
  .page-about .about-hero {
    grid-template-columns: 1.1fr 0.9fr;
    grid-template-areas:
      "intro figure"
      "stats stats";
  }

  .page-about .about-hero__intro {
    grid-area: intro;
  }

  .page-about .about-hero__figure {
    grid-area: figure;
  }

  .page-about .about-hero__stats {
    grid-area: stats;
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .about-hero__stat-num {
    font-size: 30px;
  }

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

  .page-about .about-team-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .about-certification {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }

  .page-about .about-partners__list {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .about-hero h1 {
    letter-spacing: -0.02em;
  }
}

/* 桌面端杂志双栏 */
@media (min-width: 1080px) {
  .page-about .about-layout {
    display: grid;
    grid-template-columns: var(--about-toc-w) 1fr;
    gap: 56px;
    align-items: start;
  }

  .page-about .about-toc {
    position: sticky;
    top: 24px;
    border-bottom: 0;
    margin-bottom: 0;
    padding: 8px 20px 0 0;
    border-right: 1px solid var(--line);
  }

  .page-about .about-toc__list {
    display: block;
  }

  .page-about .about-section {
    padding: 64px 0;
  }
}