/* ===== 品牌概况 · 展览画册式布局 ===== */
.page-about {
  --about-green: var(--neon-green);
  --about-hot: var(--orange-red);
  --about-bg-2: var(--deep-blue-2);
  --about-line: var(--track-blue);
  --about-dim: var(--steel-blue);
  position: relative;
  background:
    radial-gradient(1100px 480px at 92% -2%, rgba(57,255,20,.07), transparent 62%),
    radial-gradient(900px 420px at -8% 26%, rgba(255,75,62,.06), transparent 58%),
    var(--deep-blue);
  color: var(--cloud-white);
  overflow-x: hidden;
}

.page-about .section {
  padding-block: 4.5rem;
}

/* ---------- 首屏 Hero ---------- */
.page-about .about-hero {
  position: relative;
  padding-top: 8rem;
  padding-bottom: 4rem;
  overflow: hidden;
}

.page-about .about-hero__bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(115deg, transparent 0%, rgba(16,31,69,.75) 34%, rgba(16,31,69,.45) 62%, transparent 100%),
    radial-gradient(900px 340px at 18% 100%, rgba(255,75,62,.14), transparent 70%);
  clip-path: polygon(58% 0, 100% 0, 100% 100%, 22% 100%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 2;
  display: grid;
  gap: 2.5rem;
  align-items: center;
}

.page-about .about-hero__copy {
  max-width: 44rem;
}

.page-about .about-hero__label {
  display: inline-block;
  color: var(--about-green);
  margin-bottom: 1.25rem;
  border-bottom: 1px solid rgba(57,255,20,.4);
  padding-bottom: .5rem;
}

.page-about .about-hero__title {
  font-family: var(--font-headline);
  font-style: italic;
  font-weight: 800;
  font-size: clamp(2.4rem, 7vw, 4.6rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
  color: var(--cloud-white);
}

.page-about .about-hero__lead {
  font-size: 1.12rem;
  line-height: 1.7;
  color: var(--about-dim);
  max-width: 34rem;
  margin-bottom: 1.75rem;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .9rem;
  margin-bottom: 1.75rem;
}

.page-about .about-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--about-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--about-bg-2);
  box-shadow: var(--shadow-lg);
}

.page-about .about-hero__img {
  width: 100%;
  height: auto;
  display: block;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-hero__caption {
  position: absolute;
  left: 1rem;
  bottom: 1rem;
  margin: 0;
  background: rgba(11,27,58,.75);
  color: var(--cloud-white);
  border: 1px solid rgba(30,50,97,.9);
  border-radius: var(--radius-sm);
  padding: .5rem .8rem;
  z-index: 2;
}

/* ---------- 为何选择球速体育 ---------- */
.page-about .about-mission {
  position: relative;
}

.page-about .about-mission::after {
  content: "";
  position: absolute;
  top: 3rem;
  right: 0;
  width: 46vw;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(57,255,20,.35), transparent);
  pointer-events: none;
}

.page-about .about-mission__grid {
  display: grid;
  gap: 2.25rem;
}

.page-about .about-mission__heading {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1rem;
}

.page-about .about-mission__index {
  color: var(--about-dim);
  letter-spacing: .08em;
  font-size: .9rem;
}

.page-about .about-mission__body {
  max-width: 44rem;
}

.page-about .about-mission__lead {
  font-size: 1.75rem;
  line-height: 1.3;
  font-weight: 700;
  max-width: 30rem;
  margin-bottom: 1.5rem;
}

.page-about .about-mission__text {
  color: var(--about-dim);
  line-height: 1.7;
  margin-bottom: 1rem;
}

.page-about .about-mission__text strong {
  color: var(--cloud-white);
}

/* ---------- 数字一览 ---------- */
.page-about .about-stats__head {
  max-width: 46rem;
}

.page-about .about-stats__desc {
  margin-top: 1rem;
  color: var(--about-dim);
  font-size: 1.1rem;
  max-width: 34rem;
}

.page-about .about-stats__board {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 3rem;
}

.page-about .about-stat {
  background: linear-gradient(160deg, rgba(16,31,69,.92), rgba(16,31,69,.6));
  border: 1px solid var(--about-line);
  border-radius: var(--radius-md);
  padding: 2rem 1.4rem;
  min-height: 10rem;
  display: flex;
  flex-direction: column;
  gap: .4rem;
  position: relative;
  overflow: hidden;
}

.page-about .about-stat::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 2px;
  background: linear-gradient(90deg, var(--about-green), transparent 60%);
}

.page-about .about-stat--hero {
  background: linear-gradient(150deg, rgba(16,31,69,.95), rgba(11,27,58,.7));
  border-color: rgba(57,255,20,.35);
  box-shadow: inset 0 0 0 1px rgba(57,255,20,.12);
}

.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 800;
  line-height: 1;
  color: var(--about-green);
}

.page-about .about-stat--hero .about-stat__num {
  font-size: 5rem;
}

.page-about .about-stat__tag {
  font-weight: 700;
  font-size: 1rem;
  color: var(--cloud-white);
}

.page-about .about-stat__note {
  font-size: .92rem;
  color: var(--about-dim);
}

.page-about .about-stats__coverage {
  display: grid;
  gap: 2rem;
  margin-top: 4rem;
}

.page-about .about-coverage__title {
  font-family: var(--font-headline);
  font-size: 1.8rem;
  line-height: 1.2;
  margin: .75rem 0;
}

.page-about .about-coverage__text {
  color: var(--about-dim);
  line-height: 1.7;
  max-width: 34rem;
}

.page-about .about-coverage__list {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  gap: .75rem;
}

.page-about .about-coverage__list li {
  padding-left: 1.5rem;
  position: relative;
  color: var(--cloud-white);
  font-size: .95rem;
}

.page-about .about-coverage__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .45em;
  width: .55rem;
  height: .55rem;
  background: var(--about-green);
  transform: rotate(45deg);
  border-radius: 1px;
}

.page-about .about-coverage__map {
  position: relative;
  margin: 0;
  border: 1px solid var(--about-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--about-bg-2);
}

.page-about .about-coverage__map img {
  width: 100%;
  height: auto;
  display: block;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-about .about-coverage__caption {
  position: absolute;
  left: 1rem;
  bottom: 1rem;
  margin: 0;
  background: rgba(11,27,58,.72);
  padding: .5rem .75rem;
  border-radius: var(--radius-sm);
  color: var(--cloud-white);
  border: 1px solid rgba(30,50,97,.8);
  z-index: 2;
}

.page-about .about-radar {
  background: rgba(16,31,69,.5);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  justify-content: center;
}

.page-about .about-radar__svg {
  width: 100%;
  max-width: 480px;
  height: auto;
}

.page-about .about-radar__grid circle {
  fill: none;
  stroke: rgba(139,147,167,.28);
  stroke-dasharray: 4 6;
  stroke-width: 1;
}

.page-about .about-radar__axes line {
  stroke: rgba(30,50,97,.8);
  stroke-width: 1;
}

.page-about .about-radar__data {
  fill: rgba(57,255,20,.18);
  stroke: rgba(57,255,20,.85);
  stroke-width: 2;
  stroke-linejoin: round;
}

.page-about .about-radar__labels text {
  fill: var(--steel-blue);
  font-size: 12px;
  font-family: var(--font-body);
}

.page-about .about-radar__dots circle {
  fill: rgba(57,255,20,.4);
  stroke: var(--about-green);
  stroke-width: 2;
  cursor: pointer;
  transition: fill .2s, transform .2s;
  transform-origin: center;
  transform-box: fill-box;
}

.page-about .about-radar__dots circle:hover {
  fill: rgba(57,255,20,.85);
  transform: scale(1.35);
}

/* ---------- 发展轨迹 ---------- */
.page-about .about-timeline__head {
  max-width: 46rem;
}

.page-about .about-timeline__desc {
  margin-top: 1rem;
  color: var(--about-dim);
  font-size: 1.1rem;
  max-width: 34rem;
}

.page-about .about-timeline__track-wrap {
  position: relative;
  margin-top: 3rem;
}

.page-about .about-timeline__line {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 1.1rem;
  width: 2px;
  background: linear-gradient(to bottom, var(--about-green), var(--about-line) 55%, var(--about-hot));
  opacity: .6;
}

.page-about .about-timeline__track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2rem;
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 3.4rem;
}

.page-about .about-timeline__node {
  position: absolute;
  left: 0;
  top: 4px;
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 50%;
  background: var(--about-bg-2);
  border: 2px solid var(--about-green);
  display: grid;
  place-items: center;
  color: var(--about-green);
  font-size: .8rem;
  box-shadow: 0 0 0 5px rgba(57,255,20,.08);
}

.page-about .about-timeline__card {
  background: rgba(16,31,69,.55);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-md);
  padding: 1.4rem;
  transition: border-color .3s, transform .3s, box-shadow .3s;
}

.page-about .about-timeline__title {
  font-size: 1.2rem;
  font-weight: 800;
  line-height: 1.3;
  margin: .6rem 0 .5rem;
}

.page-about .about-timeline__text {
  font-size: .95rem;
  line-height: 1.65;
  color: var(--about-dim);
  margin: 0;
}

.page-about .about-timeline__figure {
  position: relative;
  margin: 3rem 0 0;
  border-radius: var(--radius-lg);
  border: 1px solid var(--about-line);
  overflow: hidden;
  background: var(--about-bg-2);
}

.page-about .about-timeline__figure img {
  width: 100%;
  height: auto;
  display: block;
  aspect-ratio: 12 / 5;
  object-fit: cover;
}

.page-about .about-timeline__caption {
  position: absolute;
  left: 1rem;
  bottom: 1rem;
  margin: 0;
  background: rgba(11,27,58,.72);
  color: var(--cloud-white);
  border: 1px solid rgba(30,50,97,.8);
  border-radius: var(--radius-sm);
  padding: .5rem .75rem;
  z-index: 2;
}

.page-about .about-timeline__item[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s var(--ease-out), transform .6s var(--ease-out);
}

.page-about .about-timeline__item.is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 服务承诺 ---------- */
.page-about .about-promise__banner {
  position: relative;
  background:
    linear-gradient(140deg, rgba(16,31,69,.95), rgba(11,27,58,.9)),
    var(--about-bg-2);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-lg);
  padding: 2.5rem 1.5rem;
  overflow: hidden;
}

.page-about .about-promise__banner::before {
  content: "";
  position: absolute;
  top: -4rem;
  right: -2rem;
  width: 18rem;
  height: 18rem;
  background: radial-gradient(circle, rgba(255,75,62,.2), transparent 70%);
  pointer-events: none;
}

.page-about .about-promise__banner::after {
  content: "";
  position: absolute;
  left: -4rem;
  bottom: -7rem;
  width: 24rem;
  height: 18rem;
  background: radial-gradient(circle, rgba(57,255,20,.12), transparent 70%);
  pointer-events: none;
}

.page-about .about-promise__head {
  position: relative;
  z-index: 2;
}

.page-about .about-promise__grid {
  position: relative;
  z-index: 2;
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
}

.page-about .about-promise__item {
  border: 1px solid var(--about-line);
  border-radius: var(--radius-md);
  padding: 1.4rem;
  background: rgba(11,27,58,.45);
  transition: border-color .3s;
}

.page-about .about-promise__item:hover {
  border-color: rgba(57,255,20,.4);
}

.page-about .about-promise__num {
  display: inline-block;
  font-size: 1rem;
  color: var(--about-hot);
  letter-spacing: .08em;
  margin-bottom: .6rem;
}

.page-about .about-promise__title {
  font-size: 1.2rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: .5rem;
}

.page-about .about-promise__text {
  color: var(--about-dim);
  line-height: 1.65;
  font-size: .95rem;
}

.page-about .about-promise__cta {
  position: relative;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  align-items: center;
  margin-top: 2rem;
}

.page-about .about-promise__link {
  color: var(--about-green);
  text-decoration: none;
  font-weight: 700;
  border-bottom: 1px solid transparent;
  transition: border-color .2s;
}

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

/* ---------- 平板与桌面断点 ---------- */
@media (min-width: 768px) {
  .page-about .about-stats__board {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-stat--hero {
    grid-column: span 2;
  }

  .page-about .about-stats__coverage {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }

  .page-about .about-coverage__copy {
    grid-column: 1 / -1;
  }

  .page-about .about-promise__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-promise__banner {
    padding: 3rem;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, .92fr);
    align-items: center;
  }

  .page-about .about-hero__figure {
    transform: translateY(2.5rem);
  }

  .page-about .about-mission__grid {
    grid-template-columns: 4fr 7fr;
    gap: 4rem;
  }

  .page-about .about-mission__body {
    padding-top: 2.5rem;
  }

  .page-about .about-stats__coverage {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    grid-template-areas: "map copy" "map radar";
  }

  .page-about .about-coverage__map {
    grid-area: map;
  }

  .page-about .about-coverage__copy {
    grid-area: copy;
  }

  .page-about .about-radar {
    grid-area: radar;
  }

  .page-about .about-timeline__line {
    left: 0;
    right: 0;
    top: 1.1rem;
    bottom: auto;
    width: auto;
    height: 2px;
    background: linear-gradient(90deg, var(--about-green), var(--about-line) 55%, var(--about-hot));
  }

  .page-about .about-timeline__track {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.5rem;
    padding-top: 0;
  }

  .page-about .about-timeline__item {
    padding-left: 0;
    padding-top: 3.4rem;
  }

  .page-about .about-timeline__node {
    left: 1.1rem;
    top: 0;
  }
}

@media (min-width: 1080px) {
  .page-about .about-stats__board {
    grid-template-columns: 1.35fr repeat(4, minmax(0, 1fr));
  }

  .page-about .about-stat--hero {
    grid-column: auto;
  }

  .page-about .about-stat__num {
    font-size: 3.4rem;
  }

  .page-about .about-stat--hero .about-stat__num {
    font-size: 5.4rem;
  }

  .page-about .section {
    padding-block: 6rem;
  }

  .page-about .about-hero__title {
    font-size: 4.6rem;
  }
}