/* ===== 关于页专属样式 ===== */
.page-about .about-page-head {
  padding-top: 56px;
}

.page-about .about-page-head::after {
  content: '';
  display: block;
  height: 2px;
  margin-top: 44px;
  background: linear-gradient(90deg, var(--c-green) 0 35%, var(--c-line) 35% 65%, var(--c-gold) 65% 100%);
}

.page-about .about-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-about .about-hero__side {
  display: flex;
  align-items: flex-start;
}

.page-about .about-hero__tag {
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-green);
  border: 1px solid var(--c-line);
  padding: 6px 12px;
  background: var(--c-surface);
}

.page-about .about-hero__main {
  max-width: 760px;
}

.page-about .about-hero__main h1 {
  margin: 0;
  font-size: clamp(34px, 6vw, 58px);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.05;
  color: var(--c-text);
}

.page-about .about-hero__subtitle {
  margin: 12px 0 0;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--c-green);
}

.page-about .about-hero__lead {
  margin: 20px 0 0;
  font-size: 15px;
  font-weight: 300;
  line-height: 1.9;
  color: var(--c-muted);
  max-width: 62ch;
}

.page-about .about-hero__stats {
  margin-top: 44px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border: 1px solid var(--c-line);
  background: var(--c-surface);
}

.page-about .about-hero__stat {
  padding: 22px 20px;
}

.page-about .about-hero__stat:nth-child(odd) {
  border-right: 1px solid var(--c-line);
}

.page-about .about-hero__stat:nth-child(-n+2) {
  border-bottom: 1px solid var(--c-line);
}

.page-about .about-hero__stat-num {
  font-size: 38px;
  line-height: 1;
  color: var(--c-green);
}

.page-about .about-hero__stat-suffix {
  font-size: 22px;
  font-weight: 700;
  color: var(--c-green);
  margin-left: 2px;
}

.page-about .about-hero__stat-label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  letter-spacing: 0.03em;
  color: var(--c-muted);
}

/* ===== 章节基础 ===== */
.page-about .site-section {
  padding-top: 64px;
}

.page-about .site-section__head {
  margin-bottom: 28px;
}

.page-about .site-section__body .site-row {
  align-items: start;
}

.page-about .site-section__lead {
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-muted);
  border-left: 2px solid var(--c-green);
  padding-left: 16px;
  margin: 8px 0 24px;
}

/* ===== 01 品牌使命 ===== */
.page-about .about-mission__content {
  display: flex;
  flex-direction: column;
}

.page-about .about-mission__text p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--c-muted);
}

.page-about .about-mission__text p:first-child {
  font-size: 18px;
  line-height: 1.9;
  color: var(--c-text);
  font-weight: 400;
}

.page-about .about-mission__text p:last-child {
  margin-bottom: 0;
}

.page-about .about-mission__figure {
  margin: 28px 0;
  border: 1px solid var(--c-line);
  background: var(--c-surface);
}

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

.page-about .about-mission__values {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-value {
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-top: 2px solid var(--c-green);
  padding: 22px 20px;
  transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
}

.page-about .about-value:hover {
  border-color: var(--c-green);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}

.page-about .about-value__index {
  font-size: 26px;
  line-height: 1;
  color: var(--c-green);
}

.page-about .about-value h3 {
  margin: 12px 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--c-text);
}

.page-about .about-value p {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--c-muted);
}

/* ===== 02 发展历程 ===== */
.page-about .about-milestones__figure {
  margin-top: 28px;
  border: 1px solid var(--c-line);
  background: var(--c-surface);
}

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

.page-about .about-timeline {
  position: relative;
  padding-left: 32px;
}

.page-about .about-timeline__track {
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--c-green), var(--c-line) 55%, var(--c-gold));
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 36px 22px;
}

.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}

.page-about .about-timeline__marker {
  position: absolute;
  left: -32px;
  top: 14px;
  width: 12px;
  height: 12px;
  border: 2px solid var(--c-green);
  background: var(--c-bg);
  transition: box-shadow 0.3s, transform 0.3s, background 0.3s;
}

.page-about .about-timeline__item:hover .about-timeline__marker,
.page-about .about-timeline__item:focus-within .about-timeline__marker {
  background: var(--c-green);
  box-shadow: 0 0 0 6px rgba(0, 255, 136, 0.18), 0 0 24px rgba(0, 255, 136, 0.45);
  transform: scale(1.25);
}

.page-about .about-timeline__year {
  display: block;
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--c-green);
  margin-bottom: 10px;
}

.page-about .about-timeline__card {
  border: 1px solid var(--c-line);
  background: var(--c-surface);
  padding: 20px 22px;
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}

.page-about .about-timeline__item:hover .about-timeline__card {
  border-color: var(--c-green);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}

.page-about .about-timeline__card h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--c-text);
}

.page-about .about-timeline__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-muted);
}

/* ===== 03 数据核对流程 ===== */
.page-about .about-workflow__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 8px;
}

.page-about .about-workflow__step {
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  padding: 22px;
  transition: border-color 0.3s, transform 0.3s;
}

.page-about .about-workflow__step:hover {
  border-color: var(--c-gold);
  transform: translateY(-2px);
}

.page-about .about-workflow__num {
  font-size: 28px;
  line-height: 1;
  color: var(--c-gold);
}

.page-about .about-workflow__step h3 {
  margin: 12px 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--c-text);
}

.page-about .about-workflow__step p {
  margin: 0 0 16px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--c-muted);
}

.page-about .about-workflow__tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--c-green);
  border: 1px solid var(--c-line);
  padding: 4px 8px;
}

/* ===== 04 团队与实力 ===== */
.page-about .about-team__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 8px;
}

.page-about .about-team__primary {
  border: 1px solid var(--c-line);
  background: linear-gradient(160deg, var(--c-surface) 10%, var(--c-bg) 100%);
  padding: 28px;
  display: flex;
  flex-direction: column;
}

.page-about .about-team__hero-num {
  font-size: 72px;
  line-height: 1;
  color: var(--c-green);
}

.page-about .about-team__primary h3 {
  margin: 14px 0 12px;
  font-size: 20px;
  font-weight: 700;
  color: var(--c-text);
}

.page-about .about-team__primary p {
  margin: 0 0 24px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--c-muted);
}

.page-about .about-team__primary img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--c-line);
  margin-top: auto;
}

.page-about .about-team__secondary {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.page-about .about-team__role {
  border: 1px solid var(--c-line);
  background: var(--c-surface);
  padding: 20px;
  transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
}

.page-about .about-team__role:hover {
  border-color: var(--c-gold);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}

.page-about .about-team__role-index {
  font-size: 20px;
  line-height: 1;
  color: var(--c-gold);
}

.page-about .about-team__role h4 {
  margin: 10px 0 6px;
  font-size: 15px;
  font-weight: 700;
  color: var(--c-text);
}

.page-about .about-team__role p {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-muted);
}

.page-about .about-team__knowledge {
  margin-top: 20px;
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-green);
  padding: 20px 22px;
  background: var(--c-surface);
}

.page-about .about-team__knowledge h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  color: var(--c-text);
}

.page-about .about-team__knowledge p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-muted);
}

/* ===== 05 合作生态 ===== */
.page-about .about-partners__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 8px;
}

.page-about .about-partners__item {
  border: 1px solid var(--c-line);
  padding: 24px;
  background: var(--c-surface);
  transition: border-color 0.3s, transform 0.3s;
}

.page-about .about-partners__item:hover {
  border-color: var(--c-green);
  transform: translateY(-2px);
}

.page-about .about-partners__item h3 {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 700;
  color: var(--c-text);
}

.page-about .about-partners__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-muted);
}

.page-about .about-partners__honor {
  margin-top: 20px;
  border: 1px solid var(--c-gold);
  border-left: 4px solid var(--c-gold);
  padding: 26px 24px;
  background: linear-gradient(135deg, rgba(255, 200, 87, 0.08), rgba(10, 14, 39, 0.4));
}

.page-about .about-partners__honor h3 {
  margin: 14px 0 8px;
  font-size: 20px;
  font-weight: 700;
  color: var(--c-gold);
}

.page-about .about-partners__honor p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-muted);
}

.page-about .about-partners__audit {
  margin-top: 20px;
  border: 1px solid var(--c-line);
  padding: 22px 24px;
}

.page-about .about-partners__audit h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  color: var(--c-text);
}

.page-about .about-partners__audit p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-muted);
}

/* ===== 探索区 ===== */
.page-about .about-explore {
  margin: 80px 0 56px;
  padding-top: 36px;
  border-top: 1px solid var(--c-line);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 18px;
}

.page-about .about-explore__title {
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.page-about .about-explore__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ===== 桌面端增强 ===== */
@media (min-width: 720px) {
  .page-about .about-mission__values,
  .page-about .about-partners__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 768px) {
  .page-about .about-page-head {
    padding-top: 72px;
  }

  .page-about .about-hero {
    grid-template-columns: 220px 1fr;
    gap: 32px;
  }

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

  .page-about .about-hero__stat:nth-child(-n+2) {
    border-bottom: 0;
  }

  .page-about .about-hero__stat:not(:last-child) {
    border-right: 1px solid var(--c-line);
  }

  .page-about .site-section {
    padding-top: 96px;
  }

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

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

  .page-about .about-workflow__step:last-child {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1fr 2fr;
    align-items: center;
    gap: 16px;
  }

  .page-about .about-workflow__step:last-child .about-workflow__num {
    font-size: 42px;
  }

  .page-about .about-workflow__step:last-child h3 {
    margin-top: 0;
  }

  .page-about .about-workflow__step:last-child p {
    margin-bottom: 0;
  }

  .page-about .about-team__layout {
    grid-template-columns: 4fr 6fr;
    gap: 24px;
  }

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

@media (max-width: 520px) {
  .page-about .about-team__secondary {
    grid-template-columns: 1fr;
  }

  .page-about .about-timeline {
    padding-left: 24px;
  }

  .page-about .about-timeline__item {
    padding-left: 16px;
  }

  .page-about .about-timeline__marker {
    left: -24px;
  }

  .page-about .about-timeline__track {
    left: 4px;
  }
}