/* ============================================================
   乐投指南 · 关于我们（/about/）
   页面专属样式 · 全部选择器限定在 .page-about 作用域内
   ============================================================ */

.page-about {
  --about-white-soft: rgba(255, 255, 255, 0.88);
  --about-card-cream: rgba(255, 255, 255, 0.78);
  --about-line-light: rgba(255, 255, 255, 0.12);
  --about-stat-gold: rgba(212, 175, 55, 0.16);
}

/* ---------- 首屏 Hero ---------- */

.page-about-hero {
  position: relative;
  background: var(--color-navy);
  color: #ffffff;
  overflow: hidden;
  padding: 72px 0 56px;
}

.page-about-hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.2;
  z-index: 1;
  display: block;
}

.page-about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(212, 175, 55, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(212, 175, 55, 0.05) 1px, transparent 1px);
  background-size: 56px 56px;
}

.page-about-hero-wrap {
  position: relative;
  z-index: 2;
}

.page-about-hero .breadcrumb {
  margin-bottom: 44px;
  font-family: var(--font-accent);
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
}

.page-about-hero .breadcrumb a {
  color: var(--color-gold);
  text-decoration: none;
  transition: color 0.25s ease;
}

.page-about-hero .breadcrumb a:hover {
  color: var(--color-orange);
}

.page-about-hero-inner {
  max-width: 880px;
}

.page-about-hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: 16px;
}

.page-about-hero-eyebrow::before {
  content: "";
  width: 32px;
  height: 2px;
  background: var(--color-gold);
}

.page-about-hero-title {
  font-family: var(--font-sans);
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: #ffffff;
  margin-bottom: 20px;
}

.page-about-hero-lead {
  font-family: var(--font-serif);
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.72;
  color: var(--about-white-soft);
  max-width: 660px;
  margin-bottom: 28px;
}

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

/* ---------- 我们是谁 ---------- */

.page-about-mission {
  position: relative;
  background: var(--color-cream);
  padding: 80px 0 72px;
  overflow: hidden;
}

.page-about-mission::before {
  content: "";
  position: absolute;
  top: 40px;
  right: -110px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  border: 1px solid rgba(212, 175, 55, 0.2);
  pointer-events: none;
}

.page-about-mission .container {
  position: relative;
  z-index: 1;
}

.page-about-mission-grid {
  display: grid;
  gap: 48px;
}

.page-about-mission-main .eyebrow,
.page-about-mission-side .eyebrow {
  color: var(--color-orange);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.page-about-mission-main h2 {
  font-family: var(--font-sans);
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 800;
  color: var(--color-navy);
  margin-bottom: 24px;
  letter-spacing: -0.01em;
}

.page-about-mission-main > p {
  font-family: var(--font-serif);
  font-size: 16px;
  line-height: 1.72;
  color: var(--color-ink);
  margin-bottom: 16px;
}

.page-about-mission-points {
  display: grid;
  gap: 16px;
  margin-top: 32px;
}

.page-about-mission-point {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 14px;
  padding: 20px;
  background: var(--about-card-cream);
  border-left: 3px solid var(--color-gold);
  border-radius: 0 12px 12px 0;
  box-shadow: 0 4px 16px rgba(11, 31, 58, 0.06);
}

.page-about-mission-num {
  font-family: var(--font-accent);
  font-size: 28px;
  font-weight: 700;
  color: var(--color-gold);
  line-height: 1;
  padding-top: 4px;
}

.page-about-mission-point h3 {
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 6px;
}

.page-about-mission-point p {
  font-family: var(--font-serif);
  font-size: 15px;
  line-height: 1.62;
  color: var(--color-ink);
  margin: 0;
}

.page-about-mission-side {
  display: grid;
  gap: 20px;
  align-content: start;
}

.page-about-mission-card {
  background: var(--color-glass);
  border: 1px solid var(--color-line);
  border-radius: 16px;
  padding: 28px 24px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.page-about-mission-card-label {
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: 12px;
}

.page-about-mission-card-text {
  font-family: var(--font-serif);
  font-size: 18px;
  line-height: 1.55;
  color: var(--color-navy);
  margin-bottom: 20px;
}

.page-about-mission-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}

.page-about-mission-list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  color: var(--color-navy);
  text-decoration: none;
  transition: color 0.25s ease;
}

.page-about-mission-list a::before {
  content: "→";
  color: var(--color-gold);
  font-family: var(--font-accent);
  font-size: 14px;
}

.page-about-mission-list a:hover {
  color: var(--color-orange);
}

/* ---------- 发展里程碑 ---------- */

.page-about-timeline {
  position: relative;
  background: var(--color-navy-deep);
  color: #ffffff;
  padding: 80px 0;
  overflow: hidden;
}

.page-about-timeline::before {
  content: "";
  position: absolute;
  top: -100px;
  right: -60px;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(212, 175, 55, 0.1) 0%, transparent 70%);
  pointer-events: none;
}

.page-about-timeline-head {
  position: relative;
  max-width: 680px;
  margin-bottom: 48px;
}

.page-about-timeline-head .eyebrow {
  color: var(--color-gold);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.page-about-timeline-head h2 {
  font-family: var(--font-sans);
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 16px;
}

.page-about-timeline-head p {
  font-family: var(--font-serif);
  font-size: 16px;
  line-height: 1.72;
  color: rgba(255, 255, 255, 0.72);
}

.page-about-timeline-grid {
  display: grid;
  gap: 40px;
}

.page-about-timeline-track {
  position: relative;
  display: grid;
  gap: 28px;
}

.page-about-timeline-track::before {
  content: "";
  position: absolute;
  left: 25px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, rgba(212, 175, 55, 0.5) 0%, rgba(212, 175, 55, 0.08) 100%);
}

.page-about-timeline-item {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 16px;
  align-items: start;
}

.page-about-timeline-meta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding-top: 4px;
}

.page-about-timeline-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-gold);
  box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.22);
}

.page-about-timeline-year {
  font-family: var(--font-accent);
  font-size: 11px;
  font-weight: 700;
  color: var(--color-gold);
  white-space: nowrap;
  letter-spacing: 0.02em;
}

.page-about-timeline-card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--about-line-light);
  border-radius: 14px;
  padding: 20px 22px;
  transition: background 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
}

.page-about-timeline-card:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(212, 175, 55, 0.35);
  transform: translateY(-2px);
}

.page-about-timeline-card h3 {
  font-family: var(--font-sans);
  font-size: 19px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 8px;
}

.page-about-timeline-card > p {
  font-family: var(--font-serif);
  font-size: 15px;
  line-height: 1.64;
  color: rgba(255, 255, 255, 0.72);
  margin-bottom: 14px;
}

.page-about-timeline-card .link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-gold);
  text-decoration: none;
  transition: color 0.25s ease;
}

.page-about-timeline-card .link-arrow:hover {
  color: var(--color-orange);
}

.page-about-timeline-media {
  padding-top: 8px;
}

.page-about-timeline-media .figure {
  margin: 0;
}

.page-about-timeline-media img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 16px;
  object-fit: cover;
}

.page-about-timeline-media .figure-caption {
  font-family: var(--font-serif);
  font-size: 14px;
  color: rgba(255, 255, 255, 0.64);
  margin-top: 12px;
  text-align: center;
}

/* ---------- 资质与认证 ---------- */

.page-about-credentials {
  background: var(--color-cream);
  padding: 80px 0;
}

.page-about-credentials-head {
  max-width: 680px;
  margin-bottom: 48px;
}

.page-about-credentials-head .eyebrow {
  color: var(--color-orange);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.page-about-credentials-head h2 {
  font-family: var(--font-sans);
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 800;
  color: var(--color-navy);
  margin-bottom: 16px;
}

.page-about-credentials-head p {
  font-family: var(--font-serif);
  font-size: 16px;
  line-height: 1.72;
  color: var(--color-ink);
}

.page-about-credentials-grid {
  display: grid;
  gap: 20px;
}

.page-about-credential-card {
  position: relative;
  background: #ffffff;
  border: 1px solid var(--color-line);
  border-radius: 16px;
  padding: 28px 24px;
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.page-about-credential-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 24px;
  bottom: 24px;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: var(--color-gold);
}

.page-about-credential-card:hover {
  box-shadow: 0 12px 28px rgba(11, 31, 58, 0.08);
  transform: translateY(-3px);
}

.page-about-credential-icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--about-stat-gold);
  color: var(--color-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}

.page-about-credential-icon svg {
  width: 26px;
  height: 26px;
}

.page-about-credential-card h3 {
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 10px;
}

.page-about-credential-card p {
  font-family: var(--font-serif);
  font-size: 15px;
  line-height: 1.66;
  color: var(--color-ink);
  margin: 0;
}

/* ---------- 服务数据 ---------- */

.page-about-stats {
  background: #ffffff;
  padding: 80px 0;
}

.page-about-stats-head {
  max-width: 680px;
  margin-bottom: 48px;
}

.page-about-stats-head .eyebrow {
  color: var(--color-orange);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.page-about-stats-head h2 {
  font-family: var(--font-sans);
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 800;
  color: var(--color-navy);
  margin-bottom: 16px;
}

.page-about-stats-head p {
  font-family: var(--font-serif);
  font-size: 16px;
  line-height: 1.72;
  color: var(--color-ink);
}

.page-about-stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.page-about-stat {
  background: var(--color-cream);
  border: 1px solid var(--color-line);
  border-radius: 16px;
  padding: 28px 16px;
  text-align: center;
  transition: background 0.3s ease, transform 0.3s ease;
}

.page-about-stat:hover {
  background: #fdfaf1;
  transform: translateY(-2px);
}

.page-about-stat-num {
  display: block;
  font-family: var(--font-accent);
  font-size: clamp(30px, 4vw, 46px);
  font-weight: 700;
  color: var(--color-navy);
  line-height: 1.05;
  margin-bottom: 8px;
}

.page-about-stat-num::after {
  content: "";
  display: block;
  width: 30px;
  height: 2px;
  background: var(--color-gold);
  margin: 10px auto 0;
}

.page-about-stat-label {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-muted);
}

.page-about-stats-media {
  margin-top: 48px;
}

.page-about-stats-media .figure {
  margin: 0;
}

.page-about-stats-media img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 16px;
  object-fit: cover;
}

.page-about-stats-media .figure-caption {
  font-family: var(--font-serif);
  font-size: 14px;
  color: var(--color-muted);
  margin-top: 12px;
  text-align: center;
}

/* ---------- CTA 连接 ---------- */

.page-about-cta {
  background: var(--color-cream);
  padding: 80px 0;
}

.page-about-cta-inner {
  position: relative;
  display: grid;
  gap: 32px;
  background: var(--color-navy);
  border-radius: 24px;
  padding: 48px 32px;
  color: #ffffff;
  overflow: hidden;
}

.page-about-cta-inner::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -40px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  border: 2px solid rgba(212, 175, 55, 0.24);
  pointer-events: none;
}

.page-about-cta-inner::after {
  content: "";
  position: absolute;
  bottom: -100px;
  right: 40px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  border: 1px solid rgba(212, 175, 55, 0.14);
  pointer-events: none;
}

.page-about-cta-text {
  position: relative;
  z-index: 1;
}

.page-about-cta-text .eyebrow {
  color: var(--color-gold);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.page-about-cta-text h2 {
  font-family: var(--font-sans);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 12px;
}

.page-about-cta-text p {
  font-family: var(--font-serif);
  font-size: 16px;
  line-height: 1.72;
  color: rgba(255, 255, 255, 0.78);
  margin: 0;
}

.page-about-cta-actions {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}

.page-about-cta-actions .btn-primary {
  background: var(--color-gold);
  border-color: var(--color-gold);
  color: var(--color-navy);
}

.page-about-cta-actions .btn-primary:hover {
  background: #e3c44a;
  border-color: #e3c44a;
}

.page-about-cta-actions .btn-ghost {
  border-color: rgba(255, 255, 255, 0.42);
  color: #ffffff;
}

.page-about-cta-actions .btn-ghost:hover {
  border-color: var(--color-orange);
  color: var(--color-orange);
}

/* ---------- 桌面端增强 ---------- */

@media (min-width: 768px) {
  .page-about-hero {
    padding: 104px 0 80px;
  }

  .page-about-mission {
    padding: 96px 0 88px;
  }

  .page-about-mission-grid {
    grid-template-columns: 1.25fr 0.75fr;
    gap: 56px;
  }

  .page-about-credentials {
    padding: 96px 0;
  }

  .page-about-credentials-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .page-about-stats {
    padding: 96px 0;
  }

  .page-about-stats-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .page-about-cta {
    padding: 96px 0;
  }

  .page-about-cta-inner {
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 40px;
    padding: 56px 48px;
  }
}

@media (min-width: 1080px) {
  .page-about-timeline {
    padding: 96px 0;
  }

  .page-about-timeline-grid {
    grid-template-columns: minmax(0, 1fr) 380px;
    gap: 56px;
    align-items: start;
  }

  .page-about-timeline-media {
    position: sticky;
    top: 32px;
  }
}