.page-about {
  --about-entry-gap: 12px;
  background:
    radial-gradient(circle at 12% 8%, rgba(53, 224, 255, 0.08), transparent 38%),
    radial-gradient(circle at 88% 92%, rgba(255, 107, 53, 0.07), transparent 42%),
    var(--ink-900);
  color: var(--light-100);
  max-width: 1600px;
  margin-inline: auto;
}

.page-about .breadcrumb {
  padding: 20px 20px 0;
}

.page-about .breadcrumb a {
  color: var(--muted-300);
}

.page-about .breadcrumb a:hover {
  color: var(--gold-400);
}

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

.about-layout {
  display: grid;
  grid-template-columns: 1fr;
}

/* ===== 左侧品牌封面 ===== */
.about-cover {
  position: relative;
  min-height: 72vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  overflow: clip;
  isolation: isolate;
  background: linear-gradient(180deg, rgba(10, 31, 68, 0.55) 0%, rgba(10, 31, 68, 0.28) 34%, var(--ink-900) 72%), var(--ink-900);
}

.about-cover::before {
  content: "";
  position: absolute;
  inset: auto -40px 8% auto;
  z-index: -1;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle at 32% 30%, rgba(255, 215, 0, 0.4), transparent 62%);
  filter: blur(4px);
}

.about-cover::after {
  content: "";
  position: absolute;
  z-index: -1;
  left: -60px;
  top: 18%;
  width: 150px;
  height: 150px;
  border-radius: 50%;
  border: 1px solid rgba(53, 224, 255, 0.25);
  box-shadow: 0 0 0 18px rgba(53, 224, 255, 0.04), 0 0 0 36px rgba(53, 224, 255, 0.03);
}

.about-cover-media {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.about-cover-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.about-cover-body {
  position: relative;
  z-index: 1;
  padding: 28px 20px 32px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--about-entry-gap);
}

.about-cover-label {
  display: flex;
  gap: 10px;
  margin: 0;
  font-family: var(--font-number);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--muted-300);
}

.about-cover-label span + span::before {
  content: "/";
  margin-right: 10px;
  color: var(--orange-500);
}

.about-cover h1 {
  margin: 0;
  font-family: var(--font-heading);
  font-size: clamp(40px, 9vw, 64px);
  line-height: 0.96;
  color: var(--bone-100);
  text-transform: uppercase;
  letter-spacing: 0.01em;
}

.about-cover-sub {
  margin: 0;
  color: var(--gold-400);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.04em;
}

.about-cover-desc {
  margin: 0;
  color: var(--muted-300);
  font-size: 14px;
  line-height: 1.75;
  max-width: 34em;
}

.about-cover-nav {
  width: 100%;
  margin-top: 2px;
}

.about-cover-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.about-cover-nav a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-number);
  font-size: 12px;
  color: var(--gold-400);
  text-decoration: none;
  border: 1px solid rgba(255, 215, 0, 0.35);
  border-radius: 999px;
  padding: 4px 12px;
  background: rgba(10, 31, 68, 0.45);
  transition: border-color var(--transition), background var(--transition), color var(--transition);
}

.about-cover-nav a:hover {
  border-color: var(--orange-500);
  background: rgba(255, 107, 53, 0.1);
  color: var(--orange-500);
}

.about-cover-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 6px;
}

.about-cover-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 4px 0 0;
}

.about-cover-meta span {
  border: 1px solid rgba(53, 224, 255, 0.4);
  color: var(--cyan-300);
  border-radius: 999px;
  padding: 4px 12px;
  font-family: var(--font-number);
  font-size: 12px;
  background: rgba(10, 31, 68, 0.5);
}

/* ===== 右侧档案内页 ===== */
.about-dossier {
  background: var(--bone-100);
  color: var(--ink-900);
  border-radius: 28px 28px 0 0;
  margin: -20px 12px 0;
  padding: 36px 20px 60px;
  position: relative;
  z-index: 2;
  box-shadow: 0 24px 60px rgba(3, 10, 26, 0.35);
}

.about-section + .about-section {
  margin-top: 44px;
  padding-top: 36px;
  border-top: 1px solid rgba(10, 31, 68, 0.1);
}

.about-section-head {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 22px;
}

.about-section-num {
  font-family: var(--font-number);
  font-size: 44px;
  line-height: 0.9;
  color: rgba(255, 215, 0, 0.65);
  -webkit-text-stroke: 1px rgba(255, 215, 0, 0.8);
  text-stroke: 1px rgba(255, 215, 0, 0.8);
  font-weight: 400;
}

.about-section-label {
  margin: 0 0 4px;
  font-family: var(--font-number);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--ink-500);
}

.about-section-head h2 {
  margin: 0;
  font-family: var(--font-heading);
  font-size: clamp(26px, 5vw, 36px);
  line-height: 1.05;
  color: var(--ink-900);
  letter-spacing: 0.01em;
}

.about-section-lead {
  margin: -8px 0 24px;
  color: var(--ink-500);
  font-size: 14px;
  line-height: 1.8;
  max-width: 56em;
}

/* ===== 01 我们是谁 ===== */
.about-who-grid {
  display: grid;
  gap: 22px;
}

.about-who-copy p {
  margin: 0 0 14px;
  color: var(--ink-700);
  font-size: 15px;
  line-height: 1.9;
}

.about-who-copy p:last-child {
  margin-bottom: 0;
}

.about-who-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin: 0;
}

.about-stat {
  background: var(--ink-900);
  border: 1px solid rgba(53, 224, 255, 0.16);
  border-radius: var(--radius-md);
  padding: 16px 14px 14px;
  box-shadow: 0 10px 24px rgba(10, 31, 68, 0.16);
}

.about-stat dt {
  margin: 0 0 6px;
  color: var(--muted-300);
  font-size: 12px;
  font-weight: 400;
}

.about-stat dd {
  margin: 0;
  font-family: var(--font-number);
  font-size: 22px;
  font-weight: 700;
  color: var(--gold-400);
  line-height: 1.1;
}

.about-stat dd .num {
  font-size: 30px;
}

/* ===== 02 时间轴 ===== */
.about-timeline-figure {
  margin: 0 0 26px;
}

.about-timeline-figure img {
  display: block;
  width: 100%;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.about-timeline::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--gold-400) 0%, var(--ink-500) 100%);
  opacity: 0.45;
}

.about-tl-item {
  position: relative;
  padding-left: 44px;
  margin-bottom: 14px;
}

.about-tl-item::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 18px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--gold-400);
  box-shadow: 0 0 0 4px rgba(255, 215, 0, 0.16);
}

.about-tl-card {
  background: var(--ink-900);
  color: var(--light-100);
  border: 1px solid rgba(53, 224, 255, 0.16);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.about-tl-card[open] {
  border-color: rgba(255, 215, 0, 0.45);
  box-shadow: 0 14px 34px rgba(10, 31, 68, 0.18);
}

.about-tl-head {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  cursor: pointer;
  user-select: none;
}

.about-tl-head::-webkit-details-marker {
  display: none;
}

.about-tl-head::after {
  content: "+";
  font-family: var(--font-number);
  font-size: 22px;
  font-weight: 400;
  line-height: 1;
  color: var(--cyan-300);
  transition: color var(--transition), transform var(--transition);
  margin-left: 2px;
}

.about-tl-card[open] .about-tl-head::after {
  content: "−";
  color: var(--orange-500);
}

.about-tl-v {
  font-family: var(--font-number);
  font-size: 20px;
  font-weight: 700;
  color: var(--cyan-300);
  background: rgba(53, 224, 255, 0.1);
  border-radius: 8px;
  padding: 5px 9px;
  min-width: 46px;
  text-align: center;
  line-height: 1;
}

.about-tl-item:first-child .about-tl-v {
  color: var(--gold-400);
  background: rgba(255, 215, 0, 0.12);
}

.about-tl-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.about-tl-info strong {
  color: var(--bone-100);
  font-size: 15px;
  font-weight: 700;
}

.about-tl-info span {
  color: var(--muted-300);
  font-size: 12px;
}

.about-tl-card[open] .about-tl-head,
.about-tl-card[open] .about-tl-head strong {
  color: var(--bone-100);
}

.about-tl-body {
  padding: 14px 16px 16px;
  border-top: 1px solid rgba(53, 224, 255, 0.1);
}

.about-tl-body ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.about-tl-body li {
  position: relative;
  padding-left: 16px;
  color: var(--light-100);
  font-size: 13px;
  line-height: 1.7;
}

.about-tl-body li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--orange-500);
}

/* ===== 03 数据能力 ===== */
.about-data-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.about-data-card {
  background: var(--ink-700);
  border: 1px solid rgba(53, 224, 255, 0.14);
  border-radius: var(--radius-md);
  padding: 18px 16px;
  position: relative;
  overflow: hidden;
}

.about-data-card::after {
  content: "";
  position: absolute;
  right: -24px;
  top: -24px;
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: radial-gradient(circle at center, rgba(255, 107, 53, 0.22), transparent 70%);
}

.about-data-label {
  margin: 0 0 8px;
  color: var(--muted-300);
  font-size: 12px;
}

.about-data-value {
  margin: 0;
  font-family: var(--font-number);
  font-size: 30px;
  font-weight: 700;
  color: var(--gold-400);
  line-height: 1.15;
}

.about-data-value .num {
  font-size: 40px;
}

.about-data-value small {
  font-size: 15px;
  color: var(--cyan-300);
  font-weight: 400;
}

.about-data-note {
  margin: 8px 0 0;
  color: var(--muted-300);
  font-size: 12px;
}

.about-data-card-wide {
  grid-column: 1 / -1;
}

.about-data-card-wide .about-data-value {
  font-size: 24px;
}

.about-data-card-wide .about-data-value .num {
  font-size: 34px;
}

.about-lottery-list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.about-lottery-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(10, 31, 68, 0.9);
  border: 1px solid rgba(255, 215, 0, 0.3);
  color: var(--bone-100);
  border-radius: 999px;
  padding: 5px 12px 5px 5px;
  font-size: 13px;
}

.about-lottery-ball {
  width: 26px;
  height: 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--gold-400);
  color: var(--ink-900);
  font-weight: 700;
  font-size: 11px;
  font-family: var(--font-number);
}

.about-data-map {
  margin: 18px 0 0;
}

.about-data-map img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: var(--radius-md);
}

/* ===== 04 资质与安全 ===== */
.about-security-grid {
  display: grid;
  gap: 14px;
}

.about-security-card {
  background: var(--ink-900);
  border: 1px solid rgba(53, 224, 255, 0.16);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  position: relative;
  overflow: hidden;
}

.about-security-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--gold-400), var(--orange-500));
  opacity: 0.65;
}

.about-security-icon {
  color: var(--gold-400);
  width: 44px;
  height: 44px;
}

.about-security-card h3 {
  margin: 2px 0 0;
  font-family: var(--font-heading);
  font-size: 18px;
  line-height: 1.2;
  color: var(--bone-100);
}

.about-security-card p {
  margin: 0;
  color: var(--muted-300);
  font-size: 13px;
  line-height: 1.65;
}

.about-license-badge {
  margin-top: 4px;
  background: rgba(255, 215, 0, 0.12);
  color: var(--gold-400);
  border-radius: 999px;
  font-family: var(--font-number);
  font-size: 12px;
  padding: 4px 12px;
  border: 1px solid rgba(255, 215, 0, 0.3);
}

/* ===== 05 设计理念 ===== */
.about-philosophy-grid {
  display: grid;
  gap: 16px;
}

.about-philosophy-card {
  background: var(--ink-700);
  border: 1px solid rgba(53, 224, 255, 0.14);
  border-radius: var(--radius-lg);
  padding: 26px 22px;
  position: relative;
  overflow: hidden;
}

.about-philosophy-card::after {
  content: "";
  position: absolute;
  right: -30px;
  bottom: -30px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: radial-gradient(circle at center, rgba(255, 107, 53, 0.16), transparent 70%);
}

.about-philosophy-num {
  font-family: var(--font-heading);
  font-size: 34px;
  line-height: 1;
  color: var(--orange-500);
  display: block;
}

.about-philosophy-card h3 {
  margin: 12px 0 10px;
  font-family: var(--font-heading);
  font-size: 18px;
  line-height: 1.35;
  color: var(--bone-100);
}

.about-philosophy-card p {
  margin: 0;
  color: var(--light-100);
  font-size: 13px;
  line-height: 1.85;
}

.about-principle {
  margin-top: 18px;
  background: var(--ink-900);
  border: 1px solid rgba(255, 215, 0, 0.28);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.about-principle::before {
  content: "";
  position: absolute;
  top: -50px;
  left: 50%;
  transform: translateX(-50%);
  width: 200px;
  height: 100px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 215, 0, 0.18), transparent 70%);
}

.about-principle-label {
  margin: 0;
  color: var(--muted-300);
  font-size: 12px;
  letter-spacing: 0.18em;
  font-family: var(--font-number);
}

.about-principle-text {
  margin: 8px 0 10px;
  font-family: var(--font-heading);
  font-size: 30px;
  line-height: 1.2;
  color: var(--gold-400);
}

.about-principle-desc {
  margin: 0 auto;
  max-width: 36em;
  color: var(--muted-300);
  font-size: 13px;
  line-height: 1.75;
}

/* ===== 继续翻阅档案 ===== */
.about-more-links {
  display: grid;
  gap: 10px;
}

.about-more-link {
  display: block;
  background: var(--ink-700);
  color: var(--bone-100);
  border: 1px solid rgba(53, 224, 255, 0.16);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
  transition: border-color var(--transition), color var(--transition), transform var(--transition), background var(--transition);
}

.about-more-link:hover {
  border-color: var(--orange-500);
  color: var(--orange-500);
  transform: translateX(4px);
  background: var(--ink-900);
}

/* ===== 响应式 ===== */
@media (min-width: 640px) {
  .about-dossier {
    margin-left: 20px;
    margin-right: 20px;
    padding: 44px 32px 64px;
  }

  .about-who-grid {
    grid-template-columns: 1.15fr 1fr;
    align-items: start;
  }

  .about-who-stats {
    grid-template-columns: 1fr 1fr;
  }

  .about-data-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }

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

  .about-philosophy-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-more-links {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .page-about .breadcrumb {
    padding: 24px 32px 0;
  }

  .about-layout {
    grid-template-columns: minmax(300px, 38%) 1fr;
    align-items: start;
  }

  .about-cover {
    position: sticky;
    top: 0;
    min-height: 100vh;
  }

  .about-cover-body {
    padding: 36px 30px 44px;
    gap: 14px;
  }

  .about-cover h1 {
    font-size: clamp(48px, 5vw, 66px);
  }

  .about-cover-desc {
    font-size: 15px;
  }

  .about-dossier {
    margin: 18px 24px 24px 0;
    border-radius: 36px;
    padding: 56px 48px 84px;
    min-height: 100vh;
  }

  .about-section + .about-section {
    margin-top: 56px;
    padding-top: 48px;
  }

  .about-section-num {
    font-size: 52px;
  }

  .about-data-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .about-data-card-wide {
    grid-column: 1 / -1;
  }

  .about-timeline {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 18px;
  }

  .about-timeline::before {
    left: 50%;
    right: 50%;
    margin-left: -1px;
  }

  .about-tl-item {
    padding-left: 34px;
  }

  .about-tl-item:nth-child(odd) {
    padding-right: 34px;
  }

  .about-tl-item:nth-child(even) {
    padding-left: 34px;
    padding-right: 0;
  }

  .about-tl-item:nth-child(odd)::before {
    left: auto;
    right: -7px;
  }

  .about-tl-item:nth-child(even)::before {
    left: -7px;
  }
}

@media (min-width: 1280px) {
  .about-dossier {
    padding: 64px 56px 96px;
  }

  .about-cover-body {
    padding: 40px 38px 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .about-cover-nav a,
  .about-tl-card,
  .about-more-link {
    transition: none;
  }
}