/* ========== 品牌介绍页专属样式 ========== */
.page-about {
  background: var(--clr-deep-space);
  color: var(--clr-white);
}

.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
}

.page-about .about-hero,
.page-about .about-timeline,
.page-about .about-credentials {
  padding-block: clamp(2.5rem, 7vw, 5.5rem);
}

.page-about .about-story,
.page-about .about-team {
  background: var(--clr-light-gray);
  color: var(--clr-deep-space);
  padding-block: clamp(2.5rem, 7vw, 5.5rem);
}

/* 大编号章节标识 */
.page-about .section-number {
  font-family: var(--font-headline);
  font-size: clamp(2.2rem, 6vw, 4rem);
  line-height: 1;
  font-weight: 700;
  color: transparent;
  -webkit-text-stroke: 2px var(--clr-neon-green);
  flex-shrink: 0;
  display: block;
}

/* 章节标题与标签的上下文配色 */
.page-about .about-timeline .section-label,
.page-about .about-credentials .section-label {
  color: var(--clr-neon-green);
}

.page-about .about-timeline .section-title,
.page-about .about-credentials .section-title {
  color: var(--clr-white);
}

.page-about .about-story .section-label,
.page-about .about-scale .section-label,
.page-about .about-team .section-label {
  color: var(--clr-electric-blue);
}

.page-about .about-story .section-title,
.page-about .about-scale .section-title,
.page-about .about-team .section-title {
  color: var(--clr-deep-space);
}

/* 标题行：编号 + 标签 + 标题 */
.page-about .about-story__heading,
.page-about .about-scale__heading,
.page-about .about-team__heading,
.page-about .about-timeline__heading,
.page-about .about-credentials__heading {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

/* ---------- Hero ---------- */
.page-about .about-hero {
  position: relative;
  background:
    radial-gradient(ellipse at 80% 20%, rgba(30, 144, 255, 0.18) 0%, transparent 50%),
    linear-gradient(115deg, var(--clr-deep-space) 35%, var(--clr-deep-slate) 100%);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  right: -80px;
  top: 40px;
  width: 240px;
  height: 40px;
  background: linear-gradient(90deg, transparent, var(--clr-orange-red));
  transform: rotate(-12deg);
  opacity: 0.6;
  pointer-events: none;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 2rem;
  padding-block: 2.5rem 1.5rem;
}

.page-about .about-hero__tag {
  margin-bottom: 0.6rem;
}

.page-about .about-hero__title {
  font-family: var(--font-headline);
  font-size: clamp(2rem, 6vw, 3.8rem);
  line-height: 1.16;
  margin-top: 0.8rem;
}

.page-about .about-hero__lede {
  max-width: 36em;
  font-size: 1rem;
  line-height: 1.8;
  color: rgba(240, 244, 248, 0.8);
  margin-top: 1.2rem;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.6rem;
}

.page-about .about-hero__visual {
  max-width: 420px;
}

.page-about .about-hero__visual svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-hero__watermark {
  font-family: var(--font-headline);
  font-size: 88px;
  fill: rgba(255, 255, 255, 0.06);
  font-weight: 700;
  letter-spacing: 0.08em;
}

.page-about .about-hero .breadcrumb__link,
.page-about .about-hero .breadcrumb__current {
  color: rgba(255, 255, 255, 0.75);
}

.page-about .about-hero .breadcrumb__link:hover {
  color: var(--clr-neon-green);
}

/* 页内锚点导航 */
.page-about .about-anchors {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.6rem;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-top: 1rem;
}

.page-about .about-anchors a {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.78);
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: var(--transition-base);
  text-decoration: none;
}

.page-about .about-anchors a:hover {
  color: var(--clr-neon-green);
}

.page-about .about-anchors a.is-active {
  color: var(--clr-neon-green);
  border-color: var(--clr-neon-green);
}

/* ---------- 品牌故事 ---------- */
.page-about .about-story__grid {
  display: grid;
  gap: 2rem;
  margin-top: 1.6rem;
}

.page-about .about-story__lead {
  font-size: clamp(1.1rem, 2.4vw, 1.4rem);
  font-weight: 600;
  line-height: 1.6;
  margin-bottom: 1rem;
}

.page-about .about-story__text p {
  color: rgba(10, 17, 40, 0.85);
  line-height: 1.8;
  margin-bottom: 1rem;
}

.page-about .about-story__media img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.page-about .about-story__media figcaption,
.page-about .about-scale__media figcaption,
.page-about .about-team__media figcaption {
  margin-top: 0.5rem;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  color: rgba(10, 17, 40, 0.65);
}

.page-about .about-story .btn-outline,
.page-about .about-team .btn-outline {
  border-color: var(--clr-deep-space);
  color: var(--clr-deep-space);
}

.page-about .about-story .btn-outline:hover,
.page-about .about-team .btn-outline:hover {
  background: var(--clr-deep-space);
  color: var(--clr-white);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  background: var(--clr-deep-space);
}

.page-about .about-timeline__intro {
  color: rgba(240, 244, 248, 0.7);
  margin-top: 0.8rem;
  line-height: 1.8;
  max-width: 42em;
}

.page-about .about-timeline__list {
  position: relative;
  margin: 2.5rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--clr-neon-green), var(--clr-electric-blue), var(--clr-violet), var(--clr-orange-red));
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 2.2rem;
  margin-bottom: 1.5rem;
}

.page-about .about-timeline__dot {
  position: absolute;
  left: 3px;
  top: 10px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--clr-deep-space);
  border: 3px solid var(--clr-neon-green);
}

.page-about .about-timeline__year {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--clr-neon-green);
  margin-bottom: 0.4rem;
}

.page-about .about-timeline__card {
  background: var(--clr-deep-slate);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 1.1rem 1.2rem;
  transition: var(--transition-base);
}

.page-about .about-timeline__card:hover {
  border-color: rgba(57, 255, 20, 0.5);
}

.page-about .about-timeline__card h3 {
  font-family: var(--font-headline);
  font-size: 1.05rem;
  margin-bottom: 0.45rem;
  color: var(--clr-white);
}

.page-about .about-timeline__card p {
  color: rgba(240, 244, 248, 0.72);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ---------- 数据与规模 ---------- */
.page-about .about-scale {
  background: var(--clr-deep-slate);
}

.page-about .about-scale__grid {
  display: grid;
  gap: 2rem;
  align-items: center;
}

.page-about .about-scale__desc {
  color: rgba(240, 244, 248, 0.72);
  line-height: 1.8;
  max-width: 38em;
  margin-top: 0.8rem;
}

.page-about .about-scale__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
  margin-top: 1.8rem;
}

.page-about .about-scale__stat {
  background: rgba(10, 17, 40, 0.6);
  border: 1px solid rgba(57, 255, 20, 0.14);
  border-radius: var(--radius-md);
  padding: 1.1rem 1rem;
}

.page-about .about-scale__number {
  display: block;
  font-family: var(--font-headline);
  font-size: clamp(1.5rem, 4vw, 2.4rem);
  color: var(--clr-neon-green);
  line-height: 1.1;
}

.page-about .about-scale__label {
  display: block;
  margin-top: 0.4rem;
  color: rgba(240, 244, 248, 0.72);
  font-size: 0.85rem;
}

.page-about .about-scale__media img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.page-about .about-scale__media figcaption {
  color: rgba(240, 244, 248, 0.6);
}

/* ---------- 技术团队 ---------- */
.page-about .about-team__lead {
  color: rgba(10, 17, 40, 0.8);
  line-height: 1.8;
  max-width: 42em;
  margin-top: 0.8rem;
}

.page-about .about-team__grid {
  display: grid;
  gap: 2rem;
  align-items: center;
  margin-top: 2rem;
}

.page-about .about-team__media img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

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

.page-about .about-team__item {
  position: relative;
  background: var(--clr-white);
  border-left: 4px solid var(--clr-neon-green);
  border-radius: var(--radius-sm);
  padding: 1rem 1.2rem;
  box-shadow: 0 6px 18px rgba(10, 17, 40, 0.08);
}

.page-about .about-team__item-num {
  font-family: var(--font-headline);
  font-size: 0.8rem;
  color: var(--clr-orange-red);
  display: block;
}

.page-about .about-team__item h3 {
  font-size: 1.05rem;
  margin: 0.3rem 0 0.4rem;
  color: var(--clr-deep-space);
}

.page-about .about-team__item p {
  color: rgba(10, 17, 40, 0.78);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ---------- 资质与安全 ---------- */
.page-about .about-credentials__list {
  display: grid;
  gap: 1rem;
  margin-top: 2.5rem;
}

.page-about .about-credential {
  background: rgba(16, 42, 67, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 1.4rem 1.3rem;
  transition: var(--transition-base);
}

.page-about .about-credential:hover {
  transform: translateY(-4px);
  border-color: var(--clr-neon-green);
}

.page-about .about-credential__icon {
  width: 48px;
  height: 48px;
  margin-bottom: 0.8rem;
}

.page-about .about-credential__icon svg {
  display: block;
  width: 100%;
  height: 100%;
}

.page-about .about-credential h3 {
  font-family: var(--font-headline);
  font-size: 1.05rem;
  color: var(--clr-white);
  margin-bottom: 0.4rem;
}

.page-about .about-credential p {
  color: rgba(240, 244, 248, 0.72);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ---------- CTA ---------- */
.page-about .about-cta {
  position: relative;
  overflow: hidden;
  background: linear-gradient(120deg, var(--clr-orange-red) 0%, rgba(255, 90, 60, 0.85) 50%, var(--clr-violet) 130%);
}

.page-about .about-cta::after {
  content: "BALLBET";
  position: absolute;
  right: -30px;
  bottom: -50px;
  font-family: var(--font-headline);
  font-size: clamp(7rem, 20vw, 14rem);
  color: rgba(255, 255, 255, 0.07);
  pointer-events: none;
  line-height: 1;
}

.page-about .about-cta__inner {
  position: relative;
  z-index: 1;
  padding-block: clamp(2.8rem, 8vw, 5rem);
  max-width: 48rem;
}

.page-about .about-cta .section-label {
  color: rgba(255, 255, 255, 0.85);
}

.page-about .about-cta h2 {
  font-family: var(--font-headline);
  font-size: clamp(1.7rem, 4.5vw, 2.8rem);
  color: var(--clr-white);
  margin-top: 0.4rem;
}

.page-about .about-cta p {
  color: rgba(255, 255, 255, 0.88);
  line-height: 1.8;
  margin-top: 0.8rem;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.5rem;
}

.page-about .about-cta .btn-outline {
  border-color: var(--clr-white);
  color: var(--clr-white);
}

.page-about .about-cta .btn-primary {
  background: var(--clr-deep-space);
  border-color: var(--clr-deep-space);
  color: var(--clr-neon-green);
}

.page-about .about-cta .btn-primary:hover {
  box-shadow: 0 8px 24px rgba(10, 17, 40, 0.35);
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1.2fr 0.8fr;
    align-items: center;
  }

  .page-about .about-story__grid,
  .page-about .about-scale__grid,
  .page-about .about-team__grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
    align-items: center;
  }

  .page-about .about-team__details {
    gap: 1.2rem;
  }

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

  .page-about .about-timeline__item {
    display: flex;
    align-items: flex-start;
    gap: 1.2rem;
  }

  .page-about .about-timeline__year {
    flex: 0 0 110px;
    text-align: right;
    margin: 0;
    padding-top: 0.4rem;
  }

  .page-about .about-timeline__card {
    flex: 1;
  }

  .page-about .about-scale__stats {
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
  }
}

/* ---------- 桌面端 ---------- */
@media (min-width: 1040px) {
  .page-about .about-credentials__list {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .about-timeline__item:nth-child(even) .about-timeline__card {
    transform: translateX(3rem);
  }
}