.page-about {
  background:
    radial-gradient(1100px 480px at 88% -5%, rgba(138, 43, 226, 0.16), transparent 60%),
    radial-gradient(900px 420px at -8% 28%, rgba(0, 216, 255, 0.10), transparent 55%),
    var(--bg-deep);
}

/* ========== 首屏框景 ========== */
.page-about .about-hero {
  padding-top: 32px;
}

.page-about .about-breadcrumbs__sep {
  margin: 0 8px;
  color: var(--text-dim);
}

.page-about .about-hero__box {
  position: relative;
  margin-top: 24px;
  padding: clamp(20px, 4vw, 52px);
  background:
    radial-gradient(360px 180px at 12% 8%, rgba(0, 216, 255, 0.22), transparent 70%),
    radial-gradient(480px 220px at 88% 92%, rgba(138, 43, 226, 0.24), transparent 70%),
    linear-gradient(135deg, rgba(0, 216, 255, 0.08), rgba(20, 26, 41, 0.88) 40%, rgba(138, 43, 226, 0.08)),
    var(--bg-raise);
  clip-path: polygon(0 0, calc(100% - 28px) 0, 100% 28px, 100% 100%, 28px 100%, 0 calc(100% - 28px));
  overflow: hidden;
  isolation: isolate;
}

.page-about .about-hero__box::after {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px solid rgba(0, 216, 255, 0.22);
  border-right-color: rgba(255, 106, 0, 0.35);
  pointer-events: none;
  z-index: 1;
}

.page-about .about-hero__top {
  position: relative;
  display: grid;
  gap: 24px;
  animation: about-rise 0.7s ease both;
  z-index: 1;
}

.page-about .about-hero__media {
  margin-top: 28px;
  animation: about-rise 0.7s ease 0.15s both;
  z-index: 1;
}

.page-about .about-hero__media img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 8px;
}

.page-about .about-hero__title {
  margin: 12px 0 14px;
  font-family: var(--font-display);
  font-size: clamp(28px, 5.4vw, 58px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--text-main);
  max-width: 11em;
}

.page-about .page-hero__lede {
  margin: 0;
  font-size: clamp(16px, 2vw, 19px);
  line-height: 1.7;
  color: var(--text-dim);
  max-width: 34em;
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 36px;
  padding-top: 20px;
  border-top: 1px dashed rgba(0, 216, 255, 0.3);
}

.page-about .about-hero__meta-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-about .about-hero__meta-num {
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-about .about-hero__meta-label {
  font-size: 13px;
  color: var(--text-dim);
}

/* ========== 品牌缘起 ========== */
.page-about .about-origin__layout {
  display: grid;
  gap: 36px;
}

.page-about .about-origin__main h2,
.page-about .about-timeline .section-head h2,
.page-about .about-evolution .section-head h2,
.page-about .about-culture__content h2 {
  margin: 10px 0 18px;
  font-family: var(--font-display);
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.18;
  color: var(--text-main);
}

.page-about .about-origin__lead {
  margin: 0 0 16px;
  font-size: 18px;
  line-height: 1.7;
  color: var(--text-main);
}

.page-about .about-origin__body p {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-about .about-origin__body strong {
  color: #E6F7FF;
}

.page-about .about-origin__quote {
  position: relative;
  margin: 24px 0;
  padding: 20px 22px;
  border-left: 3px solid var(--orange);
  background: rgba(255, 106, 0, 0.08);
  color: #FFE4D1;
  font-size: 17px;
  line-height: 1.6;
}

.page-about .about-origin__quote p {
  margin: 0;
}

.page-about .about-origin__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-origin__aside {
  display: grid;
  gap: 16px;
}

.page-about .about-origin__card {
  padding: 24px;
}

.page-about .about-origin__card h3 {
  margin: 12px 0 8px;
  font-family: var(--font-display);
  font-size: 22px;
  color: var(--text-main);
}

.page-about .about-origin__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-about .about-origin__stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 28px 20px;
  text-align: center;
  background: linear-gradient(135deg, rgba(0, 216, 255, 0.12), rgba(138, 43, 226, 0.10));
  border: 1px solid var(--border-glow);
  clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
}

.page-about .about-origin__stat-num {
  font-family: var(--font-display);
  font-size: 44px;
  font-weight: 900;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-about .about-origin__stat-label {
  font-size: 14px;
  color: var(--text-dim);
}

/* ========== 发展里程碑 ========== */
.page-about .section-head__desc {
  margin: 0;
  color: var(--text-dim);
  font-size: 16px;
  line-height: 1.6;
}

.page-about .about-timeline__accordion {
  position: relative;
  margin-top: 40px;
  padding-left: 34px;
}

.page-about .about-timeline__accordion::before {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 9px;
  width: 2px;
  background: linear-gradient(180deg, var(--blue), var(--violet), rgba(138, 43, 226, 0.1));
  opacity: 0.7;
}

.page-about .about-timeline__item {
  position: relative;
  margin-bottom: 22px;
  background: var(--glass);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.25s ease, background 0.25s ease;
}

.page-about .about-timeline__item:hover {
  border-color: rgba(0, 216, 255, 0.35);
  background: rgba(255, 255, 255, 0.08);
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -31px;
  top: 26px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 14px rgba(0, 216, 255, 0.85), 0 0 34px rgba(0, 216, 255, 0.3);
  z-index: 2;
}

.page-about .about-timeline__trigger {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 20px;
  background: transparent;
  border: 0;
  color: var(--text-main);
  text-align: left;
  font: inherit;
  cursor: pointer;
}

.page-about .about-timeline__year {
  flex: 0 0 auto;
  min-width: 48px;
  padding: 6px 10px;
  text-align: center;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 900;
  color: #06121A;
  background: linear-gradient(135deg, var(--blue), var(--violet));
  border-radius: 6px;
}

.page-about .about-timeline__heading {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.page-about .about-timeline__heading strong {
  font-size: 17px;
  line-height: 1.4;
  color: var(--text-main);
}

.page-about .about-timeline__heading small {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.5;
}

.page-about .about-timeline__plus {
  margin-left: auto;
  flex: 0 0 auto;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(0, 216, 255, 0.3);
  border-radius: 50%;
  color: var(--blue);
  font-size: 16px;
  transition: transform 0.25s ease, background 0.25s ease;
}

.page-about .about-timeline__trigger[aria-expanded="true"] .about-timeline__plus {
  transform: rotate(45deg);
  background: rgba(0, 216, 255, 0.15);
}

.page-about .about-timeline__panel {
  border-top: 1px dashed rgba(255, 255, 255, 0.1);
  background: rgba(0, 0, 0, 0.18);
}

.page-about .about-timeline__panel .accordion__panel-inner p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-about .about-timeline__figure {
  margin-top: 30px;
}

.page-about .about-timeline__figure img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.page-about .about-timeline__figcaption {
  margin-top: 10px;
  font-size: 13px;
  color: var(--text-dim);
  text-align: center;
}

/* ========== 核心功能演进 ========== */
.page-about .about-evolution {
  padding: 64px 0 56px;
  background: linear-gradient(120deg, rgba(0, 216, 255, 0.05), transparent 40%), rgba(255, 255, 255, 0.02);
}

.page-about .about-evolution .section-head {
  margin-bottom: 28px;
}

.page-about .about-evolution__grid {
  display: grid;
  gap: 16px;
}

.page-about .about-evolution__step {
  position: relative;
  padding: 24px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-top: 3px solid var(--blue);
  border-radius: var(--radius);
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.page-about .about-evolution__step:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 216, 255, 0.4);
}

.page-about .about-evolution__step:nth-child(2n) {
  border-top-color: var(--orange);
}

.page-about .about-evolution__num {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-display);
  font-size: 34px;
  font-weight: 900;
  line-height: 1;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-about .about-evolution__step h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 20px;
  color: var(--text-main);
}

.page-about .about-evolution__step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-about .about-evolution__foot {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

/* ========== 主队文化 ========== */
.page-about .about-culture__layout {
  display: grid;
  gap: 36px;
}

.page-about .about-culture__lead {
  margin: 0 0 20px;
  font-size: 17px;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-about .about-culture__list {
  display: grid;
  gap: 14px;
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
}

.page-about .about-culture__list li {
  display: grid;
  gap: 4px;
  padding: 18px 20px;
  background: var(--glass);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-left: 3px solid var(--blue);
  border-radius: calc(var(--radius) - 4px);
}

.page-about .about-culture__list li:nth-child(2n) {
  border-left-color: var(--orange);
}

.page-about .about-culture__list strong {
  font-size: 17px;
  color: var(--text-main);
}

.page-about .about-culture__list span {
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-dim);
}

.page-about .about-culture__honors {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-culture__aside {
  display: grid;
  gap: 18px;
}

.page-about .about-culture__media img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.page-about .about-culture__quote {
  padding: 22px;
}

.page-about .about-culture__quote p {
  margin: 0;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-dim);
}

/* ========== 主队号召 ========== */
.page-about .about-cta__panel {
  position: relative;
  padding: 52px 24px;
  text-align: center;
  background:
    radial-gradient(600px 220px at 20% 0%, rgba(0, 216, 255, 0.18), transparent 70%),
    radial-gradient(600px 240px at 80% 100%, rgba(138, 43, 226, 0.20), transparent 70%),
    var(--bg-raise);
  border: 1px solid var(--border-glow);
  clip-path: polygon(18px 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%, 0 18px);
}

.page-about .about-cta__panel h2 {
  margin: 10px 0 12px;
  font-family: var(--font-display);
  font-size: clamp(24px, 3.6vw, 38px);
  color: var(--text-main);
}

.page-about .about-cta__panel p {
  margin: 0 auto 24px;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}

/* ========== 动画 ========== */
@keyframes about-rise {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes about-glow {
  from { transform: scale(0.96); opacity: 0.75; }
  to { transform: scale(1.04); opacity: 1; }
}

/* ========== 桌面布局 ========== */
@media (min-width: 900px) {
  .page-about .about-origin__layout {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: start;
  }

  .page-about .about-origin__aside {
    position: sticky;
    top: 100px;
  }

  .page-about .about-timeline__accordion {
    padding-left: 0;
  }

  .page-about .about-timeline__accordion::before {
    left: 50%;
    transform: translateX(-1px);
  }

  .page-about .about-timeline__item {
    width: calc(50% - 44px);
    margin-right: calc(50% + 44px);
  }

  .page-about .about-timeline__item:nth-child(even) {
    margin-right: 0;
    margin-left: calc(50% + 44px);
  }

  .page-about .about-timeline__item::before {
    left: auto;
    right: -51px;
    top: 30px;
    width: 14px;
    height: 14px;
  }

  .page-about .about-timeline__item:nth-child(even)::before {
    right: auto;
    left: -51px;
  }

  .page-about .about-timeline__figure {
    width: 620px;
    margin-left: auto;
    margin-right: auto;
  }

  .page-about .about-culture__layout {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-about .about-evolution__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1100px) {
  .page-about .about-evolution__grid {
    grid-template-columns: repeat(4, 1fr);
  }
}