.page-about {
  --about-green: #1B5E20;
  --about-gold: #FFD700;
  --about-paper: #F5F0E6;
  --about-ink: #1A1A1A;
  --about-white: #FFFFFF;
  --about-line: #D7CCC8;

  background: var(--about-paper);
  color: var(--about-ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ===== 首屏封面 ===== */
.page-about .about-hero {
  position: relative;
  min-height: 94vh;
  display: flex;
  align-items: center;
  padding: 160px 0 80px;
  background: var(--about-green);
  isolation: isolate;
  overflow: hidden;
}

.page-about .about-hero__bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-hero__shade {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(120deg, rgba(26, 26, 26, 0.65) 0%, rgba(27, 94, 32, 0.55) 55%, rgba(27, 94, 32, 0.12) 100%),
    linear-gradient(180deg, rgba(26, 26, 26, 0.22) 0%, rgba(26, 26, 26, 0) 42%);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  color: var(--about-white);
}

.page-about .about-hero__inner .breadcrumb__link,
.page-about .about-hero__inner .breadcrumb__sep,
.page-about .about-hero__inner .breadcrumb__current {
  color: rgba(255, 255, 255, 0.78);
}

.page-about .about-hero__inner .breadcrumb__current {
  color: var(--about-gold);
}

.page-about .about-hero__eyebrow {
  color: var(--about-gold);
  margin-top: 24px;
}

.page-about .about-hero__title {
  font-family: var(--font-headline);
  font-size: clamp(38px, 6.5vw, 82px);
  line-height: 1.06;
  letter-spacing: 0.01em;
  margin: 16px 0 22px;
  max-width: 720px;
  text-transform: uppercase;
}

.page-about .about-hero__lead {
  max-width: 580px;
  font-size: clamp(16px, 1.4vw, 19px);
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.92);
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 24px 44px;
  margin-top: 44px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.22);
}

.page-about .about-hero__fact {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.page-about .about-hero__num {
  font-family: var(--font-num);
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1;
  color: var(--about-gold);
}

.page-about .about-hero__label {
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.7);
}

.page-about .about-hero__note {
  position: absolute;
  right: 32px;
  bottom: 30px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.26em;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  color: rgba(255, 255, 255, 0.55);
}

/* ===== 页内目录 ===== */
.page-about .about-index {
  position: relative;
  z-index: 2;
  margin-top: -24px;
}

.page-about .about-index__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
  padding: 14px 20px;
  background: var(--about-white);
  box-shadow: var(--shadow-1);
  clip-path: polygon(0 0, 100% 0, calc(100% - 18px) 100%, 0 100%);
}

.page-about .about-index__label {
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--about-green);
  text-transform: uppercase;
  margin-right: 8px;
}

.page-about .about-index a {
  font-family: var(--font-num);
  font-size: 14px;
  color: var(--about-ink);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  padding-bottom: 2px;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .about-index a:hover {
  border-color: var(--about-gold);
  color: var(--about-green);
}

/* ===== 章节通用 ===== */
.page-about .about-chapter {
  position: relative;
  padding: 110px 0;
  overflow: hidden;
}

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

.page-about .about-chapter__num {
  position: absolute;
  left: clamp(16px, 2.5vw, 52px);
  top: 24px;
  z-index: 2;
  font-family: var(--font-headline);
  font-size: clamp(70px, 12vw, 170px);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(27, 94, 32, 0.35);
  letter-spacing: -0.03em;
  user-select: none;
  pointer-events: none;
}

.page-about .about-chapter__stripe {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 34%;
  z-index: 0;
  pointer-events: none;
}

.page-about .about-chapter--start .about-chapter__stripe {
  right: -4%;
  width: 46%;
  background: linear-gradient(135deg, transparent 0%, rgba(27, 94, 32, 0.14) 100%);
  clip-path: polygon(24% 0, 100% 0, 78% 100%, 0 100%);
}

.page-about .about-chapter--evolution .about-chapter__stripe {
  right: 0;
  width: 40%;
  background: linear-gradient(135deg, transparent 0%, rgba(255, 215, 0, 0.22) 100%);
  clip-path: polygon(34% 0, 100% 0, 92% 100%, 8% 100%);
}

.page-about .about-chapter--milestones {
  background: var(--about-green);
  color: var(--about-white);
}

.page-about .about-chapter--milestones .about-chapter__num {
  -webkit-text-stroke: 1.5px rgba(255, 255, 255, 0.4);
}

.page-about .about-chapter--milestones .about-chapter__stripe {
  left: 0;
  right: auto;
  width: 38%;
  background: linear-gradient(120deg, rgba(255, 255, 255, 0.09) 0%, transparent 100%);
  clip-path: polygon(0 0, 100% 0, 70% 100%, 0 100%);
}

.page-about .about-chapter--team .about-chapter__stripe {
  left: 0;
  right: auto;
  width: 32%;
  background: linear-gradient(135deg, rgba(255, 215, 0, 0.2) 0%, transparent 100%);
  clip-path: polygon(0 0, 100% 0, 88% 100%, 0 100%);
}

/* ===== 01 起点 ===== */
.page-about .about-start__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
  align-items: center;
}

.page-about .about-start__card {
  padding: 34px 30px;
  background: var(--about-white);
  border-left: 6px solid var(--about-green);
  box-shadow: var(--shadow-1);
}

.page-about .about-start__title {
  font-family: var(--font-headline);
  font-size: clamp(28px, 3.4vw, 42px);
  line-height: 1.2;
  margin: 12px 0 16px;
}

.page-about .about-start__card p {
  line-height: 1.8;
  font-size: 15px;
  color: #3a3a3a;
}

.page-about .about-start__list {
  margin: 20px 0 0;
  padding-left: 20px;
  display: grid;
  gap: 10px;
  font-size: 15px;
}

.page-about .about-start__list li::marker {
  color: var(--about-gold);
}

.page-about .about-start__aside {
  background: var(--about-green);
  color: var(--about-white);
  padding: 30px 28px;
  clip-path: polygon(0 0, 100% 0, calc(100% - 24px) 100%, 0 100%);
  box-shadow: var(--shadow-1);
}

.page-about .about-start__aside-num {
  font-family: var(--font-num);
  font-size: clamp(62px, 8vw, 90px);
  line-height: 1;
  color: var(--about-gold);
}

.page-about .about-start__aside p {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.85);
}

/* ===== 02 进化 ===== */
.page-about .about-evolution__head {
  max-width: 700px;
}

.page-about .about-evolution__title {
  font-family: var(--font-headline);
  font-size: clamp(30px, 4vw, 50px);
  line-height: 1.15;
  margin: 12px 0 16px;
}

.page-about .about-evolution__lead {
  font-size: 17px;
  line-height: 1.8;
  color: #3a3a3a;
}

.page-about .about-sports {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin: 40px 0 36px;
}

.page-about .about-sports__item {
  background: var(--about-white);
  border: 1px solid var(--about-line);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-about .about-sports__item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-1);
}

.page-about .about-sports__icon {
  font-family: var(--font-headline);
  font-size: 30px;
  color: var(--about-green);
  letter-spacing: 0.02em;
}

.page-about .about-sports__name {
  font-size: 14px;
  color: #666;
}

.page-about .about-evolution__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: center;
}

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

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

.page-about .about-stats__item {
  background: var(--about-green);
  color: var(--about-white);
  padding: 24px 18px 22px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  clip-path: polygon(0 0, 100% 0, calc(100% - 16px) 100%, 0 100%);
}

.page-about .about-stats__num {
  font-family: var(--font-num);
  font-size: 26px;
  line-height: 1;
  color: var(--about-gold);
}

.page-about .about-stats__label {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.82);
}

/* ===== 03 里程碑 ===== */
.page-about .about-milestones__head {
  max-width: 660px;
  margin-bottom: 48px;
}

.page-about .about-milestones__head .eyebrow {
  color: var(--about-gold);
}

.page-about .about-milestones__title {
  font-family: var(--font-headline);
  font-size: clamp(30px, 4vw, 50px);
  line-height: 1.15;
  margin: 12px 0 14px;
  color: var(--about-white);
}

.page-about .about-milestones__head p {
  color: rgba(255, 255, 255, 0.84);
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 28px;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: rgba(255, 255, 255, 0.24);
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 44px;
}

.page-about .about-timeline__dot {
  position: absolute;
  left: 0;
  top: 24px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--about-paper);
  border: 3px solid var(--about-gold);
  box-shadow: 0 0 0 5px rgba(255, 215, 0, 0.16);
}

.page-about .about-timeline__card {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--about-white);
  padding: 22px 22px 20px;
  transition: background 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .about-timeline__card:hover {
  background: rgba(255, 255, 255, 0.18);
  transform: translateX(4px);
}

.page-about .about-timeline__tag {
  display: inline-block;
  font-family: var(--font-num);
  font-size: 14px;
  color: var(--about-gold);
  background: rgba(255, 255, 255, 0.08);
  padding: 4px 12px;
  margin-bottom: 12px;
  letter-spacing: 0.08em;
}

.page-about .about-timeline__card h3 {
  font-family: var(--font-headline);
  font-size: 22px;
  line-height: 1.3;
  margin: 0 0 8px;
  letter-spacing: 0.01em;
}

.page-about .about-timeline__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.84);
}

/* ===== 04 团队与资质 ===== */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  align-items: center;
}

.page-about .about-team__content {
  padding: 34px 30px;
  background: var(--about-white);
  box-shadow: var(--shadow-1);
  clip-path: polygon(0 0, 100% 0, calc(100% - 30px) 100%, 0 100%);
}

.page-about .about-team__title {
  font-family: var(--font-headline);
  font-size: clamp(28px, 3.4vw, 42px);
  line-height: 1.2;
  margin: 12px 0 16px;
}

.page-about .about-team__content > p {
  line-height: 1.8;
  font-size: 15px;
  color: #3a3a3a;
}

.page-about .about-team__circles {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  align-items: center;
  justify-content: center;
  margin: 28px 0;
}

.page-about .about-team__circle {
  width: 104px;
  height: 104px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  border: 2px dashed var(--about-green);
  padding: 12px;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .about-team__circle:hover {
  background: var(--about-green);
  border-color: var(--about-green);
}

.page-about .about-team__circle-tag {
  font-family: var(--font-num);
  font-size: 14px;
  color: var(--about-green);
  letter-spacing: 0.06em;
  transition: color 0.2s var(--ease);
}

.page-about .about-team__circle:hover .about-team__circle-tag {
  color: var(--about-white);
}

.page-about .about-team__aside {
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-items: center;
}

.page-about .about-team__media {
  width: 100%;
  max-width: 400px;
}

.page-about .about-team__media img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
}

.page-about .about-team__aside p {
  font-size: 14px;
  letter-spacing: 0.14em;
  color: var(--about-green);
  text-transform: uppercase;
}

/* ===== 数据规模与服务 ===== */
.page-about .about-services {
  padding: 40px 0 56px;
  position: relative;
}

.page-about .about-services__inner {
  max-width: 980px;
  margin: 0 auto;
  text-align: center;
}

.page-about .about-services__inner h2 {
  font-family: var(--font-headline);
  font-size: clamp(26px, 3.2vw, 42px);
  line-height: 1.2;
  margin: 12px 0 36px;
}

.page-about .about-services__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  text-align: left;
}

.page-about .about-services__card {
  background: var(--about-white);
  padding: 26px;
  border-top: 5px solid var(--about-green);
  box-shadow: var(--shadow-1);
}

.page-about .about-services__card:nth-child(2) {
  border-top-color: var(--about-gold);
}

.page-about .about-services__card h3 {
  font-family: var(--font-headline);
  font-size: 22px;
  line-height: 1.3;
  margin-bottom: 10px;
}

.page-about .about-services__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: #444;
}

/* ===== 继续探索 ===== */
.page-about .about-next {
  padding: 24px 0 90px;
}

.page-about .about-next__inner {
  max-width: 980px;
  margin: 0 auto;
}

.page-about .about-next__inner h2 {
  font-family: var(--font-headline);
  font-size: clamp(26px, 3.4vw, 42px);
  line-height: 1.2;
  margin: 8px 0 32px;
}

.page-about .about-next__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-about .about-next__card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 26px;
  background: var(--about-white);
  text-decoration: none;
  color: var(--about-ink);
  border-bottom: 4px solid var(--about-green);
  box-shadow: var(--shadow-1);
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-next__card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-2);
  border-bottom-color: var(--about-gold);
}

.page-about .about-next__card .badge {
  align-self: flex-start;
}

.page-about .about-next__title {
  font-family: var(--font-headline);
  font-size: 20px;
  line-height: 1.35;
}

.page-about .about-next__desc {
  font-size: 14px;
  line-height: 1.7;
  color: #555;
}

/* ===== 滚动显现 ===== */
.page-about [data-reveal] {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
}

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

/* ===== 桌面端增强 ===== */
@media (min-width: 768px) {
  .page-about .about-start__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.6fr);
    gap: 44px;
  }

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

  .page-about .about-evolution__grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 40px;
  }

  .page-about .about-team__grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
  }

  .page-about .about-services__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
  }

  .page-about .about-next__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
  }
}

@media (min-width: 900px) {
  .page-about .about-timeline {
    display: block;
  }

  .page-about .about-timeline::before {
    left: 50%;
    margin-left: -1px;
  }

  .page-about .about-timeline__item {
    width: 50%;
    padding: 0 52px 0 16px;
    margin-bottom: 44px;
  }

  .page-about .about-timeline__item:nth-child(even) {
    margin-left: 50%;
    padding: 0 16px 0 52px;
  }

  .page-about .about-timeline__item:nth-child(odd) .about-timeline__dot {
    left: auto;
    right: -11px;
  }

  .page-about .about-timeline__item:nth-child(even) .about-timeline__dot {
    left: -11px;
    right: auto;
  }
}

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

  .page-about .about-timeline__card:hover,
  .page-about .about-next__card:hover,
  .page-about .about-sports__item:hover {
    transform: none;
  }
}

.page-about {
  --reveal-delay: 0.3s;
}