/* ===== 关于我们页面专属样式 ===== */
.page-about {
  --about-gold-soft: rgba(245, 179, 1, 0.12);
  --about-green-glass: rgba(6, 40, 30, 0.82);
  --about-navy-glass: rgba(11, 16, 38, 0.72);
  --about-line-gold: linear-gradient(90deg, var(--gold) 0%, rgba(245, 179, 1, 0) 100%);
  background-color: var(--night);
  color: var(--white);
  overflow-x: hidden;
}

/* ---------- Hero 区 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 104px 20px 72px;
  background:
    radial-gradient(ellipse at 18% 18%, rgba(245, 179, 1, 0.08) 0%, transparent 48%),
    linear-gradient(125deg, var(--green) 0%, var(--green-dark) 42%, var(--night) 100%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 42px), 0 100%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 32px;
  height: 1px;
  background: linear-gradient(90deg, var(--gold) 0%, rgba(245, 179, 1, 0) 36%);
}

.page-about .about-hero__inner {
  max-width: var(--container);
  margin: 0 auto;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 36px;
  margin-top: 44px;
}

.page-about .about-hero__text {
  min-width: 0;
}

.page-about .about-hero__kicker {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gray-green);
  margin: 0 0 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-about .about-hero__kicker::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--red);
  display: inline-block;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-size: 40px;
  font-style: italic;
  line-height: 1.04;
  letter-spacing: -0.5px;
  text-transform: uppercase;
  margin: 0 0 14px;
  color: var(--white);
}

.page-about .about-hero__title em {
  font-style: italic;
  background: linear-gradient(120deg, var(--gold-soft) 0%, var(--gold) 64%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about .about-hero__subtitle {
  font-family: var(--font-display);
  font-size: 18px;
  font-style: italic;
  letter-spacing: 0.02em;
  color: var(--gold);
  margin: 0 0 20px;
}

.page-about .about-hero__desc {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  color: var(--gray-green);
  max-width: 620px;
  margin: 0;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  align-self: end;
}

.page-about .about-hero__stat {
  background: var(--about-navy-glass);
  border: 1px solid var(--border);
  border-left: 2px solid var(--gold);
  padding: 18px 14px 16px;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(6px);
  transition: transform 0.35s var(--ease-out), border-color 0.35s var(--ease-out);
}

.page-about .about-hero__stat:hover {
  transform: translateY(-3px);
  border-color: rgba(245, 179, 1, 0.5);
}

.page-about .about-hero__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--gold);
  margin-bottom: 6px;
}

.page-about .about-hero__label {
  display: block;
  font-family: var(--font-body);
  font-size: 12px;
  line-height: 1.5;
  color: var(--gray-green);
}

/* ---------- 主体两栏布局 ---------- */
.page-about .about-body {
  position: relative;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px 64px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

/* ---------- 章节导航 ---------- */
.page-about .chapter-rail {
  position: relative;
  margin-top: 36px;
  padding: 24px 20px 20px;
  border: 1px solid var(--border);
  background: linear-gradient(135deg, rgba(10, 61, 46, 0.55) 0%, rgba(11, 16, 38, 0.65) 100%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), 0 100%);
  scroll-margin-top: 120px;
}

.page-about .chapter-rail__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gray-green);
  margin: 0 0 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
}

.page-about .chapter-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 4px;
}

.page-about .chapter-rail__list a {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 10px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  color: var(--gray-green);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color 0.3s var(--ease-out), border-color 0.3s var(--ease-out), background-color 0.3s var(--ease-out);
}

.page-about .chapter-rail__list a:hover {
  color: var(--white);
  border-left-color: var(--gold);
  background: rgba(245, 179, 1, 0.07);
}

.page-about .chapter-rail__index {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gold);
  min-width: 28px;
}

.page-about .chapter-rail__line {
  height: 1px;
  margin-top: 20px;
  background: var(--about-line-gold);
}

/* ---------- 内容区通用 ---------- */
.page-about .about-content {
  min-width: 0;
}

.page-about .about-block {
  scroll-margin-top: 104px;
  margin-bottom: 76px;
}

.page-about .about-block__head {
  margin-bottom: 28px;
  position: relative;
}

.page-about .section-title {
  font-family: var(--font-display);
  font-size: 34px;
  font-style: italic;
  line-height: 1.12;
  margin: 0;
  color: var(--white);
  text-transform: uppercase;
  letter-spacing: 0.01em;
}

.page-about .section-title::after {
  content: "";
  display: block;
  width: 72px;
  height: 3px;
  margin-top: 14px;
  background: var(--about-line-gold);
}

.page-about .about-block__lead {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.9;
  color: var(--gray-green);
  max-width: 720px;
  margin: 0 0 28px;
}

/* ---------- 我们是谁 ---------- */
.page-about .about-intro__grid {
  display: grid;
  gap: 28px;
}

.page-about .about-intro__text p {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.95;
  color: var(--gray-green);
  margin: 0 0 20px;
}

.page-about .about-intro__text p strong {
  color: var(--white);
}

.page-about .about-intro__figure {
  margin: 0;
  position: relative;
}

.page-about .about-intro__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), 0 100%);
  border: 1px solid var(--border);
}

.page-about .about-intro__figure figcaption {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--gray-green);
  line-height: 1.6;
  margin-top: 14px;
  padding-left: 18px;
  border-left: 2px solid var(--gold);
}

/* ---------- 数据版图 ---------- */
.page-about .about-data__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-bottom: 28px;
}

.page-about .about-data__grid .data-card {
  background: var(--about-green-glass);
  border: 1px solid var(--border);
  border-left: 3px solid var(--gold);
  padding: 20px 18px;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(4px);
  transition: transform 0.35s var(--ease-out), border-color 0.35s var(--ease-out);
}

.page-about .about-data__grid .data-card:hover {
  transform: translateY(-4px);
  border-color: rgba(245, 179, 1, 0.45);
}

.page-about .about-data__grid .metric__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gray-green);
  margin-bottom: 10px;
}

.page-about .about-data__grid .metric {
  display: block;
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1.15;
  color: var(--gold);
}

.page-about .about-data__grid .metric--alert {
  color: var(--red);
}

.page-about .data-card__note {
  display: block;
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.6;
  color: var(--gray-green);
  margin-top: 10px;
}

.page-about .about-data__bottom {
  display: grid;
  gap: 28px;
}

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

.page-about .about-data__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--border);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), 8% 100%);
}

.page-about .about-data__figure figcaption {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--gray-green);
  margin-top: 12px;
  padding-left: 16px;
  border-left: 2px solid var(--gold);
}

.page-about .about-data__facts {
  background: var(--night-soft);
  border: 1px solid var(--border);
  padding: 24px 22px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), 4% 100%);
}

.page-about .about-data__facts-title {
  font-family: var(--font-display);
  font-size: 20px;
  font-style: italic;
  margin: 0 0 16px;
  color: var(--white);
  text-transform: uppercase;
}

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

.page-about .about-data__facts-list li {
  position: relative;
  padding-left: 20px;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.7;
  color: var(--gray-green);
}

.page-about .about-data__facts-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  background: var(--gold);
  transform: rotate(45deg);
}

/* ---------- 发展里程碑 ---------- */
.page-about .about-timeline {
  position: relative;
  padding-left: 30px;
  margin-bottom: 36px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(to bottom, var(--gold) 0%, rgba(245, 179, 1, 0.12) 100%);
}

.page-about .about-timeline__item {
  position: relative;
  margin-bottom: 20px;
}

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

.page-about .about-timeline__dot {
  position: absolute;
  left: -30px;
  top: 18px;
  width: 18px;
  height: 18px;
  border: 3px solid var(--gold);
  border-radius: 50%;
  background: var(--night);
  box-shadow: 0 0 0 4px rgba(245, 179, 1, 0.12);
  transition: background 0.35s var(--ease-out), transform 0.35s var(--ease-out);
}

.page-about .about-timeline__item:hover .about-timeline__dot {
  background: var(--gold);
  transform: scale(1.12);
}

.page-about .about-timeline__panel {
  background: rgba(17, 27, 58, 0.6);
  border: 1px solid var(--border);
  border-left: 2px solid transparent;
  padding: 18px 18px 16px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), 0 100%);
  transition: border-color 0.35s var(--ease-out), background-color 0.35s var(--ease-out), transform 0.35s var(--ease-out);
}

.page-about .about-timeline__item:hover .about-timeline__panel {
  border-left-color: var(--gold);
  background: rgba(10, 61, 46, 0.45);
  transform: translateX(4px);
}

.page-about .about-timeline__year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--gold);
  background: rgba(245, 179, 1, 0.08);
  padding: 4px 10px;
  margin-bottom: 12px;
}

.page-about .about-timeline__title {
  font-family: var(--font-display);
  font-size: 21px;
  font-style: italic;
  margin: 0 0 8px;
  color: var(--white);
}

.page-about .about-timeline__desc {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.8;
  color: var(--gray-green);
  margin: 0;
}

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

.page-about .about-milestone__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--border);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), 4% 100%);
}

.page-about .about-milestone__figure figcaption {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--gray-green);
  margin-top: 12px;
  padding-left: 16px;
  border-left: 2px solid var(--gold);
}

/* ---------- 会员中心哲学 ---------- */
.page-about .about-member__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-member__statement {
  position: relative;
  padding: 28px 24px;
  background: var(--about-green-glass);
  border: 1px solid var(--border);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), 0 100%);
  background-image: radial-gradient(circle at 88% 12%, rgba(245, 179, 1, 0.08) 0%, transparent 52%);
}

.page-about .about-member__statement::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(to bottom, var(--gold), var(--red), var(--gold));
}

.page-about .about-member__lead {
  font-family: var(--font-display);
  font-size: 20px;
  font-style: italic;
  line-height: 1.65;
  color: var(--white);
  margin: 0 0 18px;
}

.page-about .about-member__statement p:last-child {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.95;
  color: var(--gray-green);
  margin: 0;
}

.page-about .about-member__principles {
  display: grid;
  gap: 14px;
}

.page-about .about-member__principle {
  position: relative;
  padding: 18px 18px 18px 62px;
  border: 1px solid var(--border);
  background: rgba(11, 16, 38, 0.5);
  transition: background-color 0.3s var(--ease-out), border-color 0.3s var(--ease-out);
}

.page-about .about-member__principle:hover {
  background: rgba(245, 179, 1, 0.05);
  border-color: rgba(245, 179, 1, 0.35);
}

.page-about .about-member__principle-num {
  position: absolute;
  left: 18px;
  top: 20px;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--gold);
}

.page-about .about-member__principle-title {
  font-family: var(--font-display);
  font-size: 18px;
  font-style: italic;
  margin: 0 0 8px;
  color: var(--white);
}

.page-about .about-member__principle-desc {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.75;
  color: var(--gray-green);
  margin: 0;
}

/* ---------- 底部行动区 ---------- */
.page-about .about-cta {
  position: relative;
  padding: 40px 24px 44px;
  background:
    linear-gradient(135deg, rgba(245, 179, 1, 0.06) 0%, transparent 42%),
    var(--green);
  border: 1px solid var(--border);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), 0 100%);
  text-align: center;
}

.page-about .about-cta__title {
  font-family: var(--font-display);
  font-size: 26px;
  font-style: italic;
  line-height: 1.3;
  color: var(--white);
  margin: 0 0 24px;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}

/* ---------- 移动端适配（375 及以下加固） ---------- */
@media (max-width: 420px) {
  .page-about .about-hero {
    padding: 88px 16px 60px;
  }

  .page-about .about-hero__title {
    font-size: 34px;
  }

  .page-about .about-hero__stats {
    grid-template-columns: 1fr;
    gap: 10px;
  }

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

  .page-about .about-cta__actions {
    flex-direction: column;
  }

  .page-about .about-cta__actions .btn {
    width: 100%;
    text-align: center;
  }
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero {
    padding: 128px 32px 88px;
  }

  .page-about .about-hero__title {
    font-size: 56px;
  }

  .page-about .about-hero__desc {
    font-size: 17px;
  }

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

  .page-about .about-body {
    padding: 0 32px 72px;
    gap: 48px;
  }

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

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

  .page-about .about-data__bottom {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 32px;
    align-items: stretch;
  }

  .page-about .about-member__grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }

  .page-about .section-title {
    font-size: 40px;
  }
}

/* ---------- 桌面端 ---------- */
@media (min-width: 1024px) {
  .page-about .about-hero {
    padding: 140px 48px 96px;
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 56px), 0 100%);
  }

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

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(300px, 0.8fr);
    gap: 56px;
    align-items: end;
  }

  .page-about .about-hero__title {
    font-size: 80px;
  }

  .page-about .about-hero__subtitle {
    font-size: 22px;
  }

  .page-about .about-hero__desc {
    font-size: 18px;
    line-height: 1.9;
  }

  .page-about .about-hero__stats {
    gap: 14px;
  }

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

  .page-about .about-body {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 56px;
    padding: 0 48px 88px;
  }

  .page-about .chapter-rail {
    position: sticky;
    top: 120px;
    margin: 0;
    max-height: calc(100vh - 160px);
    overflow-y: auto;
  }

  .page-about .about-block {
    margin-bottom: 96px;
  }

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

  .page-about .about-cta {
    padding: 52px 32px 60px;
  }

  .page-about .about-cta__title {
    font-size: 34px;
  }
}

/* ---------- 宽屏 ---------- */
@media (min-width: 1440px) {
  .page-about .about-hero__inner,
  .page-about .about-body {
    max-width: calc(var(--container) + 64px);
  }

  .page-about .about-hero__title {
    font-size: 92px;
  }
}