/* ==========================================================
   页面专属样式 · .page-about
   品牌概况 — 深海赌场·数据档案库 / 垂直时间轴 + 斜切面板
   ========================================================== */
.page-about {
  --about-gold: #D4AF37;
  --about-line-gold: #B8934A;
  --about-coral: #FF6B5B;
  --about-dark-red: #8B1E2D;
  --about-navy: #0A1A2F;
  --about-graphite: #1F2D3D;
  --about-ivory: #F5EFE0;
  --about-dim: #B9C6D4;
  --about-faint: #7A8DA0;
  --about-mist: #7FA6C9;
  background: var(--navy-deep);
  color: var(--text-main);
  overflow-x: clip;
  position: relative;
}

/* ==================== 1. 首屏 Hero ==================== */
.page-about .about-hero {
  padding: 40px 0 56px;
  position: relative;
  border-bottom: 1px solid rgba(212, 175, 55, .18);
  background:
    radial-gradient(ellipse at 78% 10%, rgba(212, 175, 55, .16), transparent 50%),
    radial-gradient(ellipse at 8% 80%, rgba(255, 107, 91, .09), transparent 44%),
    linear-gradient(168deg, #0A1A2F 0%, #10263F 62%, #0A1A2F 100%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -1px;
  width: 38%;
  height: 4px;
  background: linear-gradient(90deg, transparent, var(--gold), var(--coral));
}

.page-about .about-hero-grid {
  display: grid;
  gap: 40px;
  margin-top: 36px;
}

.page-about .about-hero-kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 16px;
}

.page-about .about-hero-kicker::before {
  content: "";
  width: 32px;
  height: 1px;
  background: var(--line-gold);
  flex: none;
}

.page-about .about-hero-copy h1 {
  font-family: var(--font-head);
  font-size: clamp(38px, 8.5vw, 66px);
  line-height: 1.1;
  font-weight: 800;
  letter-spacing: .02em;
  margin: 0 0 22px;
}

.page-about .about-hero-lead {
  max-width: 520px;
  margin-bottom: 26px;
  font-size: 17px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* —— 统计指标卡 —— */
.page-about .about-hero-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.page-about .about-stat {
  position: relative;
  padding: 18px 16px;
  background: linear-gradient(135deg, rgba(31, 45, 61, .88), rgba(16, 38, 63, .72));
  border: 1px solid rgba(212, 175, 55, .28);
}

.page-about .about-stat::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 0 18px 18px 0;
  border-color: transparent rgba(184, 147, 74, .6) transparent transparent;
}

.page-about .about-stat-num {
  display: block;
  font-family: var(--font-head);
  font-size: 30px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--ivory);
}

.page-about .about-stat-unit {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--text-dim);
  margin-top: 7px;
}

/* 面包屑分隔符 */
.page-about .crumb-sep {
  margin: 0 8px;
  font-family: var(--font-mono);
  color: var(--text-faint);
}

/* ==================== 2. 品牌故事 ==================== */
.page-about .about-story {
  padding: 72px 0 64px;
  position: relative;
}

.page-about .about-story-grid {
  display: grid;
  gap: 40px;
  align-items: center;
}

.page-about .about-story-copy h2 {
  font-family: var(--font-head);
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.2;
  font-weight: 700;
  margin-bottom: 20px;
}

.page-about .about-story-para {
  max-width: 560px;
  margin-bottom: 14px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-about .about-story-quote {
  margin: 24px 0 0;
  padding-left: 16px;
  border-left: 3px solid var(--gold);
  font-family: var(--font-head);
  font-size: 18px;
  font-style: italic;
  color: var(--ivory);
}

/* —— 故事视觉面板 —— */
.page-about .about-story-visual {
  position: relative;
}

.page-about .about-visual-frame {
  position: relative;
  padding: 32px 28px 24px;
  background: linear-gradient(150deg, rgba(31, 45, 61, .9), rgba(10, 26, 47, .6));
  border: 1px solid rgba(212, 175, 55, .25);
}

.page-about .about-visual-frame::before {
  content: "";
  position: absolute;
  top: -1px;
  right: -1px;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 0 26px 26px 0;
  border-color: transparent var(--line-gold) transparent transparent;
}

.page-about .about-visual-tag {
  display: block;
  margin-bottom: 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .about-visual-svg {
  display: block;
  width: 100%;
  max-width: 360px;
  height: auto;
  margin: 0 auto;
}

.page-about .about-visual-caption {
  display: block;
  margin-top: 20px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-faint);
}

/* ==================== 3. 发展里程碑 ==================== */
.page-about .about-milestones {
  position: relative;
  padding: 72px 0;
  border-top: 1px solid rgba(212, 175, 55, .12);
  border-bottom: 1px solid rgba(212, 175, 55, .12);
  background:
    repeating-linear-gradient(45deg, transparent 0 18px, rgba(212, 175, 55, .03) 18px 36px),
    linear-gradient(180deg, transparent 0%, rgba(16, 38, 63, .35) 16%, rgba(16, 38, 63, .35) 84%, transparent 100%);
}

.page-about .about-milestones .section-head {
  margin-bottom: 48px;
}

.page-about .about-milestones .section-desc {
  max-width: 460px;
  margin-top: 12px;
}

.page-about .about-timeline-layout {
  display: grid;
  gap: 44px;
  align-items: start;
}

/* —— 时间线容器 —— */
.page-about .about-timeline-wrap {
  position: relative;
  display: grid;
  gap: 28px;
  padding: 8px 0;
}

.page-about .about-timeline-rail {
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: 15px;
  width: 2px;
  opacity: .65;
  background: linear-gradient(180deg, transparent, var(--line-gold) 8%, var(--line-gold) 92%, transparent);
}

/* —— 里程碑卡片 —— */
.page-about .about-milestone {
  position: relative;
  padding-left: 48px;
}

.page-about .about-milestone-node {
  position: absolute;
  top: 22px;
  left: 8px;
  z-index: 2;
  width: 14px;
  height: 14px;
  background: var(--gold);
  border: 2px solid var(--navy-deep);
  box-shadow: 0 0 0 2px rgba(212, 175, 55, .35);
  transform: rotate(45deg);
}

.page-about .about-milestone-card {
  position: relative;
  padding: 22px 20px;
  background: linear-gradient(135deg, rgba(31, 45, 61, .78), rgba(10, 26, 47, .5));
  border: 1px solid rgba(212, 175, 55, .2);
  transition: border-color .3s, transform .3s;
}

.page-about .about-milestone-card::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(105deg, rgba(212, 175, 55, .08), transparent 42%);
}

.page-about .about-milestone-card:hover {
  border-color: rgba(212, 175, 55, .5);
  transform: translateY(-2px);
}

.page-about .about-milestone-version {
  display: inline-block;
  margin-bottom: 12px;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .12em;
  color: var(--gold);
  background: rgba(212, 175, 55, .12);
  border: 1px solid rgba(212, 175, 55, .3);
}

.page-about .about-milestone-card h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 700;
}

.page-about .about-milestone-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-dim);
}

/* —— 时间线配图 —— */
.page-about .about-timeline-figure {
  margin: 0;
  position: relative;
}

.page-about .about-timeline-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border: 1px solid rgba(212, 175, 55, .2);
  filter: saturate(.9) contrast(1.02);
}

.page-about .about-timeline-figure figcaption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--text-faint);
}

/* ==================== 4. 数据安全与合规 ==================== */
.page-about .about-security {
  position: relative;
  padding: 72px 0;
  border-top: 3px solid var(--dark-red);
  border-bottom: 1px solid rgba(139, 30, 45, .3);
  background:
    radial-gradient(ellipse at 88% 18%, rgba(139, 30, 45, .22), transparent 50%),
    linear-gradient(150deg, #0A1A2F 0%, #132033 55%, #0D1A28 100%);
}

.page-about .about-security::before {
  content: "SECURE";
  position: absolute;
  top: 22px;
  right: 20px;
  pointer-events: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .3em;
  color: rgba(139, 30, 45, .45);
  writing-mode: vertical-rl;
}

.page-about .about-security-grid {
  display: grid;
  gap: 40px;
  align-items: center;
}

.page-about .about-security-copy h2 {
  font-family: var(--font-head);
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.2;
  margin-bottom: 18px;
}

.page-about .about-security-lead {
  margin-bottom: 24px;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-about .about-security-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid rgba(139, 30, 45, .45);
}

.page-about .about-security-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 14px 12px;
  border-bottom: 1px solid rgba(139, 30, 45, .45);
  transition: background .3s, box-shadow .3s;
}

.page-about .about-security-list li:hover {
  background: rgba(139, 30, 45, .16);
  box-shadow: inset 4px 0 0 var(--dark-red);
}

.page-about .security-item-name {
  font-size: 14px;
  color: var(--text-dim);
}

.page-about .security-item-val {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--gold);
  text-align: right;
}

.page-about .about-security-figure {
  margin: 0;
}

.page-about .about-security-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border: 1px solid rgba(139, 30, 45, .3);
}

.page-about .about-security-figure figcaption {
  margin-top: 12px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-faint);
}

/* ==================== 5. 团队理念 ==================== */
.page-about .about-team {
  padding: 72px 0;
}

.page-about .about-team-grid {
  display: grid;
  gap: 40px;
  align-items: center;
}

.page-about .about-team-figure {
  margin: 0;
  order: 2;
}

.page-about .about-team-copy {
  order: 1;
}

.page-about .about-team-copy h2 {
  font-family: var(--font-head);
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.2;
  margin-bottom: 18px;
}

.page-about .about-team-para {
  margin-bottom: 22px;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-about .about-team-principles {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-team-principles li {
  position: relative;
  margin-bottom: 12px;
  padding-left: 22px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-dim);
}

.page-about .about-team-principles li::before {
  content: "";
  position: absolute;
  top: 9px;
  left: 0;
  width: 9px;
  height: 9px;
  background: transparent;
  border: 2px solid var(--gold);
  transform: rotate(45deg);
}

.page-about .about-team-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border: 1px solid rgba(212, 175, 55, .18);
}

.page-about .about-team-figure figcaption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-faint);
}

/* ==================== 6. 信任声明与引导 ==================== */
.page-about .about-trust {
  padding: 64px 0 80px;
  background: linear-gradient(180deg, #0A1A2F, #0C1D32);
}

.page-about .about-trust-panel {
  position: relative;
  padding: 36px 28px;
  text-align: center;
  background:
    repeating-linear-gradient(135deg, transparent 0 16px, rgba(212, 175, 55, .04) 16px 32px),
    linear-gradient(135deg, rgba(31, 45, 61, .6), rgba(10, 26, 47, .4));
  border: 1px solid rgba(212, 175, 55, .35);
}

.page-about .about-trust-panel::before {
  content: "";
  position: absolute;
  top: -1px;
  right: -1px;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 0 22px 22px 0;
  border-color: transparent var(--dark-red) transparent transparent;
}

.page-about .about-trust-text {
  max-width: 720px;
  margin: 0 auto 24px;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-about .about-trust-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

/* ==================== 响应式 · 平板及以上 ==================== */
@media (min-width: 800px) {
  .page-about .about-hero {
    padding: 56px 0 72px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: 1.1fr .9fr;
    gap: 48px;
    align-items: center;
  }

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

  .page-about .about-story-grid {
    grid-template-columns: 1.05fr .95fr;
    gap: 56px;
  }

  .page-about .about-security-grid {
    grid-template-columns: 1fr 1fr;
    gap: 56px;
  }

  .page-about .about-team-grid {
    grid-template-columns: .9fr 1.1fr;
    gap: 56px;
  }

  .page-about .about-team-figure {
    order: 1;
  }

  .page-about .about-team-copy {
    order: 2;
  }
}

/* ==================== 响应式 · 桌面端 ==================== */
@media (min-width: 1024px) {
  .page-about .about-timeline-layout {
    grid-template-columns: 1.55fr 1fr;
    gap: 56px;
  }

  /* 时间线转为中间轨道 + 左右交错 */
  .page-about .about-timeline-rail {
    left: 50%;
    transform: translateX(-50%);
  }

  .page-about .about-timeline-wrap {
    grid-template-columns: 1fr 1fr;
    gap: 40px 24px;
  }

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

  .page-about .about-milestone--left {
    grid-column: 1;
    padding-right: 56px;
    text-align: right;
  }

  .page-about .about-milestone--right {
    grid-column: 2;
    padding-left: 56px;
    text-align: left;
  }

  .page-about .about-milestone-node {
    top: 22px;
    left: auto;
    right: auto;
  }

  .page-about .about-milestone--left .about-milestone-node {
    right: -19px;
  }

  .page-about .about-milestone--right .about-milestone-node {
    left: -19px;
  }

  .page-about .about-visual-frame {
    padding: 40px 32px 28px;
  }
}

/* ==================== 动效减弱偏好 ==================== */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-milestone-card,
  .page-about .about-security-list li,
  .page-about .about-stat {
    transition: none;
  }

  .page-about .about-milestone-card:hover {
    transform: none;
  }
}