/* ===== 页面专属：品牌故事 about ===== */
.page-about {
  --about-max: 1200px;
  --about-pad: 24px;
  background: var(--c-light);
  color: var(--c-ink);
  overflow-x: hidden;
}

.page-about__wrap {
  width: 100%;
  max-width: var(--about-max);
  margin-inline: auto;
  padding-inline: var(--about-pad);
}

/* 首屏区域 */
.page-about__hero {
  position: relative;
  isolation: isolate;
  background: var(--c-navy);
  color: var(--c-text-light);
  padding: 28px 0 80px;
  overflow: hidden;
}

.page-about__hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 48px 48px;
}

.page-about__hero::after {
  content: "";
  position: absolute;
  top: -60px;
  right: -160px;
  width: 60%;
  height: 130%;
  z-index: -1;
  background: var(--c-deep);
  border-left: 3px solid var(--c-red);
  transform: skewX(-14deg);
}

.page-about__hero-inner {
  padding-top: 12px;
}

.page-about__hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  padding-top: 40px;
}

.page-about__hero-kicker {
  display: inline-block;
  margin: 0 0 16px;
  padding: 6px 12px;
  background: var(--c-red);
  color: #ffffff;
  font-family: var(--font-data);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.page-about__hero-title {
  margin: 0 0 6px;
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 10vw, 5rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.015em;
  color: var(--c-text-light);
}

.page-about__hero-subtitle {
  margin: 0 0 18px;
  font-family: var(--font-heading);
  font-size: clamp(1.05rem, 3.5vw, 1.6rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--c-orange);
}

.page-about__hero-desc {
  max-width: 58ch;
  margin: 0;
  font-size: 0.98rem;
  line-height: 1.75;
  color: rgba(229, 233, 240, 0.82);
}

.page-about__hero-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--c-border);
  border: 1px solid var(--c-border);
  clip-path: polygon(0 0, 100% 5%, 100% 100%, 0 95%);
}

.page-about__hero-stat {
  background: var(--c-deep);
  padding: 20px 16px;
}

.page-about__hero-stat-num {
  display: block;
  font-family: var(--font-data);
  font-size: 1.9rem;
  font-weight: 700;
  line-height: 1;
  color: var(--c-gold);
}

.page-about__hero-stat-label {
  display: block;
  margin-top: 8px;
  font-size: 0.78rem;
  line-height: 1.4;
  color: rgba(229, 233, 240, 0.72);
}

.page-about__hero-slice {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 10px;
  background: linear-gradient(100deg, var(--c-red) 0 20%, var(--c-orange) 20% 65%, var(--c-gold) 65%);
  transform: skewY(-0.8deg) scale(1.02);
}

/* 品牌初心 */
.page-about__intro {
  position: relative;
  padding: 64px 0 76px;
  background: var(--c-light);
}

.page-about__intro-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.page-about__intro-copy p {
  max-width: 64ch;
  margin: 16px 0 0;
  font-size: 0.98rem;
  line-height: 1.75;
  color: var(--c-ink);
}

.page-about__intro-copy p:first-of-type {
  margin-top: 28px;
}

.page-about__intro-edge {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 6px;
  padding: 24px;
  color: var(--c-text-light);
  background: var(--c-deep);
  clip-path: polygon(0 12px, 100% 0, 100% 100%, 0 100%);
}

.page-about__intro-edge::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--c-orange) 0 60%, var(--c-red) 60%);
}

.page-about__intro-num {
  font-size: 2.2rem;
  color: var(--c-gold);
}

.page-about__intro-edge .data-label {
  color: rgba(229, 233, 240, 0.7);
}

/* 里程碑 */
.page-about__milestones {
  position: relative;
  overflow: hidden;
  padding: 88px 0 100px;
  background: var(--c-navy);
  color: var(--c-text-light);
}

.page-about__milestones::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 44px 44px;
  opacity: 0.6;
}

.page-about__m-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
}

.page-about__m-head {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.page-about__section-index {
  font-family: var(--font-data);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--c-orange);
}

.page-about__m-title {
  margin: 8px 0 0;
  font-family: var(--font-heading);
  font-size: clamp(2.6rem, 8vw, 4.6rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--c-text-light);
}

.page-about__section-note {
  margin-top: 12px;
  font-family: var(--font-data);
  font-size: 0.76rem;
  line-height: 1.6;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(229, 233, 240, 0.55);
}

.page-about__m-intro {
  max-width: 34ch;
  margin: 20px 0 0;
  font-size: 0.94rem;
  line-height: 1.7;
  color: rgba(229, 233, 240, 0.78);
}

.page-about__timeline {
  position: relative;
}

.page-about__timeline-list {
  position: relative;
  z-index: 2;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about__tl-item {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  padding: 0 0 44px 44px;
}

.page-about__tl-item:last-child {
  padding-bottom: 0;
}

.page-about__tl-item::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 8px;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--c-orange), var(--c-red) 90%);
  opacity: 0.7;
}

.page-about__tl-item:last-child::before {
  display: none;
}

.page-about__tl-shape {
  position: absolute;
  left: 7px;
  top: 6px;
  z-index: 2;
  width: 16px;
  height: 16px;
  background: var(--c-deep);
  border: 3px solid var(--c-gold);
  transform: rotate(45deg);
  border-radius: 2px;
}

.page-about__tl-item:nth-child(2) .page-about__tl-shape {
  border-color: var(--c-orange);
  transform: rotate(0deg);
  border-radius: 50%;
}

.page-about__tl-item:nth-child(3) .page-about__tl-shape {
  border-color: var(--c-red);
  transform: rotate(45deg) scale(1.12);
  border-radius: 0;
}

.page-about__tl-item:nth-child(4) .page-about__tl-shape {
  border-color: var(--c-data);
  transform: rotate(0deg);
  border-radius: 50%;
}

.page-about__tl-item:nth-child(5) .page-about__tl-shape {
  border-color: var(--c-gold);
  transform: rotate(45deg);
  border-radius: 0;
}

.page-about__tl-year {
  font-family: var(--font-data);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  color: var(--c-gold);
}

.page-about__tl-card {
  position: relative;
  padding: 16px 18px;
  background: var(--c-deep);
  border: 1px solid var(--c-border);
  border-left: 4px solid var(--c-orange);
}

.page-about__tl-tag {
  display: inline-block;
  margin-bottom: 8px;
  padding: 3px 8px;
  font-family: var(--font-data);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--c-navy);
  background: var(--c-gold);
}

.page-about__tl-card h3 {
  margin: 0 0 6px;
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--c-text-light);
}

.page-about__tl-card p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.65;
  color: rgba(229, 233, 240, 0.72);
}

.page-about__timeline-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  opacity: 0.5;
}

/* 数据使命 */
.page-about__data-mission {
  position: relative;
  padding: 88px 0 92px;
  background: var(--c-light);
}

.page-about__data-mission::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 18%;
  height: 6px;
  background: var(--c-red);
}

.page-about__data-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
}

.page-about__data-lead {
  max-width: 42ch;
  margin: 28px 0 0;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--c-ink);
}

.page-about__data-list {
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  border-top: 2px solid var(--c-border);
}

.page-about__data-list li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--c-border);
}

.page-about__data-list strong {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 800;
  color: var(--c-navy);
}

.page-about__data-list span {
  font-size: 0.88rem;
  color: #4a5568;
}

.page-about__data-metrics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin: 28px 0;
}

.page-about__data-metric {
  padding: 16px;
  background: var(--c-deep);
  color: var(--c-text-light);
}

.page-about__data-metric .data-num {
  display: block;
  font-size: 1.6rem;
  color: var(--c-gold);
}

.page-about__data-metric .data-label {
  display: block;
  margin-top: 4px;
  color: rgba(229, 233, 240, 0.7);
}

.page-about__data-visual {
  position: relative;
  align-self: start;
}

.page-about__data-visual img,
.page-about__sport-visual img,
.page-about__co-visual img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about__data-visual img {
  position: relative;
  z-index: 1;
  border: 1px solid var(--c-border);
  clip-path: polygon(0 0, 100% 8%, 100% 100%, 0 92%);
}

.page-about__visual-mark {
  position: absolute;
  top: -18px;
  right: 8px;
  z-index: 2;
  font-family: var(--font-heading);
  font-size: clamp(3rem, 10vw, 5.4rem);
  font-weight: 900;
  line-height: 0.9;
  color: transparent;
  -webkit-text-stroke: 2px var(--c-orange);
  opacity: 0.28;
  pointer-events: none;
}

.page-about__visual-caption {
  display: block;
  margin-top: 14px;
  font-family: var(--font-data);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #65748c;
}

/* 竞技基因 */
.page-about__sport-gene {
  position: relative;
  padding: 88px 0 92px;
  background: var(--c-light);
  overflow: hidden;
}

.page-about__sport-gene::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(105deg, transparent 0 62%, rgba(10, 25, 49, 0.06) 62%),
    repeating-linear-gradient(-18deg, transparent 0 22px, rgba(255, 107, 0, 0.16) 22px 23px, transparent 23px 46px);
  pointer-events: none;
}

.page-about__sport-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
}

.page-about__sport-visual {
  position: relative;
}

.page-about__sport-visual img {
  position: relative;
  z-index: 1;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 8% 100%);
}

.page-about__sport-frame {
  position: absolute;
  top: -14px;
  left: -14px;
  z-index: 0;
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 900;
  line-height: 1.1;
  color: var(--c-orange);
  transform: rotate(-6deg);
  opacity: 0.9;
}

.page-about__sport-frame span {
  display: block;
  font-size: 2.4rem;
  color: var(--c-red);
}

.page-about__sport-copy p {
  max-width: 48ch;
  margin: 18px 0 0;
  font-size: 0.98rem;
  line-height: 1.75;
  color: var(--c-ink);
}

.page-about__sport-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 24px 0;
}

.page-about__sport-tags span {
  padding: 6px 14px;
  font-family: var(--font-data);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--c-navy);
  border: 1px solid var(--c-border);
  background: #ffffff;
}

.page-about__sport-tags span:nth-child(1) {
  border-color: var(--c-orange);
  color: var(--c-orange);
}

.page-about__sport-tags span:nth-child(3) {
  border-color: var(--c-gold);
  color: #9a7000;
}

/* 用户共创 */
.page-about__co-create {
  position: relative;
  padding: 88px 0 92px;
  background: var(--c-navy);
  color: var(--c-text-light);
  overflow: hidden;
}

.page-about__co-create::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

.page-about__co-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
}

.page-about__co-copy p {
  max-width: 56ch;
  margin: 22px 0 0;
  font-size: 0.98rem;
  line-height: 1.75;
  color: rgba(229, 233, 240, 0.85);
}

.page-about__co-list {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about__co-list li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 0;
  border-bottom: 1px solid var(--c-border);
}

.page-about__co-list strong {
  font-family: var(--font-heading);
  font-size: 1.02rem;
  font-weight: 800;
  color: var(--c-gold);
}

.page-about__co-list span {
  font-size: 0.9rem;
  color: rgba(229, 233, 240, 0.68);
}

.page-about__co-quote {
  position: relative;
  margin: 26px 0 0;
  padding: 18px 20px 18px 28px;
  font-size: 0.94rem;
  line-height: 1.7;
  color: rgba(229, 233, 240, 0.9);
  border-left: 4px solid var(--c-orange);
  background: var(--c-deep);
}

.page-about__co-actions {
  margin-top: 28px;
}

.page-about__co-visual {
  position: relative;
}

.page-about__co-visual img {
  position: relative;
  z-index: 1;
  border: 1px solid var(--c-border);
  clip-path: polygon(0 0, 100% 4%, 100% 100%, 0 96%);
}

.page-about__co-glow {
  position: absolute;
  right: -20px;
  bottom: -20px;
  width: 70%;
  height: 70%;
  background: linear-gradient(135deg, transparent 0%, rgba(255, 107, 0, 0.35) 100%);
  filter: blur(24px);
  pointer-events: none;
}

.page-about__co-visual .page-about__visual-caption {
  color: rgba(229, 233, 240, 0.55);
}

/* 了解更多 */
.page-about__more {
  position: relative;
  padding: 84px 0 96px;
  background: var(--c-light);
}

.page-about__more-inner {
  position: relative;
  z-index: 1;
}

.page-about__more-inner > p {
  max-width: 52ch;
  margin: 20px 0 28px;
  font-size: 0.98rem;
  line-height: 1.75;
  color: var(--c-ink);
}

.page-about__more-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* 桌面端及以上 */
@media (min-width: 800px) {
  .page-about__hero {
    padding-bottom: 96px;
  }

  .page-about__hero-grid {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 56px;
    align-items: center;
  }

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

  .page-about__intro-grid,
  .page-about__data-grid,
  .page-about__sport-grid,
  .page-about__co-grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 64px;
    align-items: center;
  }

  .page-about__intro-grid {
    grid-template-columns: 7fr 4fr;
  }

  .page-about__intro-edge {
    min-height: 320px;
  }

  .page-about__m-grid {
    grid-template-columns: 200px 1fr;
    gap: 72px;
  }

  .page-about__m-title {
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    align-self: start;
    margin-top: 0;
    font-size: 4.8rem;
  }

  .page-about__m-head .page-about__section-note {
    margin-top: 4px;
  }

  .page-about__tl-item {
    grid-template-columns: 170px 1fr;
    gap: 28px;
    padding: 0 0 56px 0;
  }

  .page-about__tl-item::before {
    left: 196px;
  }

  .page-about__tl-shape {
    left: 189px;
    top: 10px;
  }

  .page-about__tl-year {
    grid-column: 1;
    text-align: right;
    font-size: 3.1rem;
    line-height: 1.05;
  }

  .page-about__tl-card {
    grid-column: 2;
  }

  .page-about__tl-card h3 {
    font-size: 1.18rem;
  }

  .page-about__data-list li {
    flex-direction: row;
    justify-content: space-between;
    gap: 24px;
  }

  .page-about__data-list strong {
    flex-shrink: 0;
  }

  .page-about__data-list span {
    text-align: right;
  }

  .page-about__data-visual img {
    margin-top: 24px;
  }

  .page-about__sport-gene::before {
    background:
      linear-gradient(105deg, transparent 0 55%, rgba(10, 25, 49, 0.08) 55%),
      repeating-linear-gradient(-18deg, transparent 0 22px, rgba(255, 107, 0, 0.18) 22px 23px, transparent 23px 46px);
  }

  .page-about__sport-grid {
    grid-template-columns: 1fr 1fr;
    gap: 72px;
  }

  .page-about__co-list li {
    flex-direction: row;
    justify-content: space-between;
    gap: 24px;
  }

  .page-about__co-list span {
    text-align: right;
  }

  .page-about__co-visual {
    order: 2;
  }

  .page-about__co-copy {
    order: 1;
  }
}

@media (min-width: 1160px) {
  .page-about__hero-grid {
    gap: 88px;
  }

  .page-about__m-grid {
    grid-template-columns: 220px 1fr;
    gap: 96px;
  }

  .page-about__m-title {
    font-size: 5.6rem;
  }

  .page-about__data-grid,
  .page-about__sport-grid,
  .page-about__co-grid {
    gap: 96px;
  }

  .page-about__data-visual {
    transform: translateX(20px);
  }

  .page-about__sport-visual {
    transform: translateX(-12px);
  }
}