.page-about {
  --year-col: 76px;
  --fire-glow: 0 0 18px rgba(255, 77, 0, 0.55);
  overflow-x: hidden;
}

.page-about .breadcrumb {
  display: flex;
  justify-content: flex-start;
  padding-block: 14px 0;
}

.page-about .section {
  padding-block: clamp(3rem, 7vw, 5.5rem);
}

.page-about .section-kicker {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-fire);
  margin-bottom: 0.75rem;
}

.page-about .section-kicker::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--color-fire);
  flex: 0 0 auto;
}

.page-about .section-head {
  margin-bottom: 2.2rem;
}

.page-about .section-head h2 {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3.6vw, 2.6rem);
  line-height: 1.18;
  color: var(--color-space);
  margin: 0 0 0.8rem;
  letter-spacing: -0.01em;
}

.page-about .section-desc {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--color-ink);
  opacity: 0.75;
  margin: 0;
  max-width: 42em;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  margin-top: 0;
}

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

/* 品牌陈述区 */
.page-about .about-hero {
  background-color: var(--color-space);
  background-image:
    radial-gradient(circle at 18% 22%, rgba(64, 105, 169, 0.4), transparent 34%),
    radial-gradient(circle at 86% 70%, rgba(255, 77, 0, 0.14), transparent 28%),
    radial-gradient(circle at 55% 8%, rgba(192, 199, 209, 0.07), transparent 22%);
  color: var(--color-white);
  padding-block: clamp(2.6rem, 6vw, 5rem);
}

.page-about .about-hero__intro {
  margin-bottom: 1.8rem;
}

.page-about .about-hero__path {
  font-size: 13px;
  color: var(--color-fire);
  letter-spacing: 0.12em;
  margin-bottom: 1rem;
}

.page-about .about-hero__intro h1 {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5.6vw, 4.2rem);
  line-height: 1.08;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 1.2rem;
  letter-spacing: -0.02em;
}

.page-about .about-hero__lead {
  font-size: 1.02rem;
  line-height: 1.75;
  color: var(--color-night);
  max-width: 46em;
  margin: 0 0 1.8rem;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: rgba(192, 199, 209, 0.18);
  border: 1px solid rgba(192, 199, 209, 0.18);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .about-hero__stat {
  background: rgba(10, 30, 63, 0.86);
  padding: 14px 16px;
}

.page-about .about-hero__num {
  display: block;
  font-size: 1.35rem;
  line-height: 1.2;
  color: var(--color-fire);
  font-weight: 600;
}

.page-about .about-hero__label {
  display: block;
  font-size: 13px;
  line-height: 1.4;
  color: var(--color-night);
  margin-top: 4px;
}

.page-about .about-hero__figure {
  margin: 1.6rem 0 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lift);
  transform: rotate(1.4deg) translateX(5px);
}

.page-about .about-hero__figure img {
  aspect-ratio: 16 / 9;
}

/* 品牌简介与使命 */
.page-about .about-mission {
  background: var(--color-paper);
  color: var(--color-text);
}

.page-about .about-mission__layout {
  display: grid;
  gap: 2.4rem;
}

.page-about .about-mission__main h2,
.page-about .about-team__content h2,
.page-about .about-promise__content h2 {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3.6vw, 2.6rem);
  line-height: 1.2;
  color: var(--color-space);
  margin-bottom: 1.2rem;
}

.page-about .about-mission__main p {
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 1rem;
  color: var(--color-text);
}

.page-about .about-mission__aside {
  background: var(--color-white);
  border: 1px solid var(--color-silver-light);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.4rem;
  box-shadow: var(--shadow-card);
}

.page-about .about-mission__aside h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-style: italic;
  color: var(--color-space);
  margin: 0 0 1rem;
}

.page-about .about-mission__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.page-about .about-mission__list li {
  border-left: 2px solid var(--color-fire);
  padding-left: 12px;
}

.page-about .about-mission__list strong {
  display: block;
  color: var(--color-space);
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.page-about .about-mission__list span {
  display: block;
  font-size: 0.875rem;
  line-height: 1.55;
  color: #555b66;
}

/* 发展里程碑 */
.page-about .about-milestones {
  background-color: var(--color-ink);
  background-image:
    radial-gradient(circle at 85% 10%, rgba(255, 77, 0, 0.12), transparent 26%),
    radial-gradient(circle at 10% 90%, rgba(192, 199, 209, 0.08), transparent 30%);
  color: var(--color-night);
}

.page-about .about-milestones .section-head h2 {
  color: var(--color-white);
}

.page-about .about-milestones .section-desc {
  color: var(--color-night);
  opacity: 0.82;
}

.page-about .about-milestones__track {
  position: relative;
}

.page-about .about-milestones__line {
  position: absolute;
  left: calc(var(--year-col) - 1px);
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0,
    transparent 5px,
    rgba(192, 199, 209, 0.55) 5px,
    rgba(192, 199, 209, 0.55) 9px
  );
  pointer-events: none;
}

.page-about .about-milestones__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.3rem;
}

.page-about .about-milestones__item {
  position: relative;
  display: grid;
  grid-template-columns: var(--year-col) 1fr;
  gap: 16px;
  align-items: start;
}

.page-about .about-milestones__item::before {
  content: "";
  position: absolute;
  left: calc(var(--year-col) - 7px);
  top: 7px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-fire);
  box-shadow: 0 0 0 4px rgba(255, 77, 0, 0.16), 0 0 18px rgba(255, 77, 0, 0.6);
  z-index: 1;
}

.page-about .about-milestones__year {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.9rem);
  line-height: 0.95;
  font-weight: 700;
  font-style: italic;
  text-align: right;
  color: var(--color-fire);
  padding-top: 7px;
  letter-spacing: -0.01em;
}

.page-about .about-milestones__card {
  background: var(--color-paper);
  color: var(--color-text);
  border-radius: var(--radius-md);
  padding: 1.15rem 1.25rem;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

.page-about .about-milestones__card::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-fire), var(--color-fire-grad));
}

.page-about .about-milestones__card h3 {
  font-size: 1.1rem;
  color: var(--color-space);
  margin: 0.55rem 0 0.35rem;
}

.page-about .about-milestones__card p {
  font-size: 0.875rem;
  line-height: 1.65;
  color: #4a4f58;
  margin: 0;
}

.page-about .about-milestones__card .tag {
  background: rgba(255, 77, 0, 0.1);
  color: var(--color-fire);
}

/* 团队与数据保障 */
.page-about .about-team {
  background: var(--color-paper);
}

.page-about .about-team__layout {
  display: grid;
  gap: 2.2rem;
}

.page-about .about-team__figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transform: rotate(-1.2deg) translateX(-3px);
}

.page-about .about-team__figure img {
  aspect-ratio: 3 / 2;
}

.page-about .about-team__content > p {
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 1.3rem;
}

.page-about .about-team__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.8rem;
}

.page-about .about-team__list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 0.95rem 1.05rem;
  box-shadow: var(--shadow-card);
}

.page-about .about-team__list-icon {
  width: 10px;
  height: 10px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--color-fire);
  box-shadow: 0 0 10px rgba(255, 77, 0, 0.55);
  margin-top: 5px;
}

.page-about .about-team__list strong {
  display: block;
  color: var(--color-space);
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.page-about .about-team__list p {
  font-size: 0.85rem;
  line-height: 1.6;
  color: #555b66;
  margin: 0;
}

/* 合作生态与行业认可 */
.page-about .about-eco {
  background-color: var(--color-space);
  background-image:
    radial-gradient(circle at 15% 20%, rgba(64, 105, 169, 0.3), transparent 32%),
    radial-gradient(circle at 90% 80%, rgba(255, 77, 0, 0.1), transparent 26%);
  color: var(--color-white);
}

.page-about .about-eco .section-head h2 {
  color: var(--color-white);
}

.page-about .about-eco .section-desc {
  color: var(--color-night);
  opacity: 0.82;
}

.page-about .about-eco__grid {
  display: grid;
  gap: 1rem;
}

.page-about .about-eco__card {
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(192, 199, 209, 0.2);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.3rem;
  backdrop-filter: blur(6px);
}

.page-about .about-eco__num {
  font-size: 0.85rem;
  color: var(--color-fire);
}

.page-about .about-eco__card h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--color-white);
  margin: 0.55rem 0 0.5rem;
}

.page-about .about-eco__card p {
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--color-night);
  margin: 0;
}

.page-about .about-eco__award {
  background: linear-gradient(120deg, var(--color-fire), var(--color-fire-grad));
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.4rem;
  box-shadow: var(--shadow-fire);
  transform: rotate(0.6deg);
}

.page-about .about-eco__award-label {
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.82);
  margin: 0 0 0.4rem;
}

.page-about .about-eco__award h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: #fff;
  margin: 0 0 0.4rem;
}

.page-about .about-eco__award p {
  color: rgba(255, 255, 255, 0.92);
  font-size: 0.9rem;
  line-height: 1.6;
  margin: 0;
}

/* 球迷服务承诺 */
.page-about .about-promise {
  background: var(--color-paper);
}

.page-about .about-promise__layout {
  display: grid;
  gap: 2.2rem;
}

.page-about .about-promise__figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lift);
  transform: rotate(1deg) translateX(4px);
}

.page-about .about-promise__figure img {
  aspect-ratio: 2 / 1;
}

.page-about .about-promise__content > p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: 1.2rem;
}

.page-about .about-promise__list {
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.page-about .about-promise__list li {
  background: var(--color-white);
  border-left: 3px solid var(--color-fire);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1rem;
  font-size: 0.92rem;
  line-height: 1.65;
  color: #3e434d;
}

.page-about .about-promise__list strong {
  color: var(--color-space);
}

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

/* 站内路径 */
.page-about .about-links {
  background: var(--color-silver-light);
  padding-block: 2.4rem clamp(3rem, 7vw, 5rem);
}

.page-about .about-links__grid {
  display: grid;
  gap: 0.8rem;
}

.page-about .about-links__item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  background: var(--color-white);
  border-radius: var(--radius-pill);
  padding: 1rem 1.35rem;
  text-decoration: none;
  color: var(--color-text);
  box-shadow: var(--shadow-card);
  transition: background-color 0.25s ease, transform 0.25s ease, color 0.25s ease;
}

.page-about .about-links__item:hover {
  background: var(--color-space);
  color: var(--color-white);
  transform: translateX(5px);
}

.page-about .about-links__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-fire);
}

.page-about .about-links__item:hover .about-links__label {
  color: var(--color-fire);
}

/* 响应式：平板与桌面 */
@media (min-width: 640px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, 1fr);
  }

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

  .page-about .about-links__item {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.3rem;
  }
}

@media (min-width: 768px) {
  .page-about .about-hero__layout {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    grid-template-areas:
      "intro figure"
      "stats figure";
    gap: 2.4rem 3.4rem;
    align-items: end;
  }

  .page-about .about-hero__intro {
    grid-area: intro;
    margin-bottom: 0;
  }

  .page-about .about-hero__stats {
    grid-area: stats;
  }

  .page-about .about-hero__figure {
    grid-area: figure;
    margin: 0;
    align-self: center;
  }

  .page-about .about-mission__layout {
    grid-template-columns: 1.5fr 0.8fr;
    gap: 3.5rem;
    align-items: start;
  }

  .page-about .about-mission__aside {
    position: sticky;
    top: 24px;
  }

  .page-about .about-milestones__track {
    --year-col: 96px;
  }

  .page-about .about-milestones__list {
    max-width: 860px;
  }

  .page-about .about-milestones__item {
    gap: 24px;
  }

  .page-about .about-milestones__year {
    font-size: clamp(2.3rem, 4vw, 3.2rem);
  }

  .page-about .about-team__layout {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 3.2rem;
    align-items: center;
  }

  .page-about .about-eco__grid {
    grid-template-columns: repeat(12, 1fr);
  }

  .page-about .about-eco__card {
    grid-column: span 4;
  }

  .page-about .about-eco__award {
    grid-column: span 12;
    display: flex;
    align-items: center;
    gap: 1.2rem;
  }

  .page-about .about-eco__award p:last-child {
    max-width: 34em;
  }

  .page-about .about-promise__layout {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 3rem;
    align-items: center;
  }

  .page-about .about-promise__figure {
    transform: rotate(0.8deg) translateX(3px);
  }
}

@media (min-width: 1024px) {
  .page-about .about-team__layout {
    gap: 5rem;
  }

  .page-about .about-promise__layout {
    gap: 4.5rem;
  }

  .page-about .about-promise__list li {
    font-size: 0.96rem;
  }

  .page-about .about-eco__card {
    padding: 1.6rem 1.6rem 1.7rem;
  }
}