/* ===== page-about 专属样式 ===== */
.page-about {
  --about-panel: rgba(22, 32, 48, 0.88);
  --about-purple-soft: rgba(138, 43, 226, 0.14);
  --about-green-soft: rgba(0, 255, 135, 0.08);
  --about-border-soft: rgba(42, 58, 74, 0.8);
}

/* ===== 英雄区 ===== */
.page-about .about-hero {
  position: relative;
  padding: 64px 0 56px;
  overflow: hidden;
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: -20%;
  width: 70%;
  height: 100%;
  background: linear-gradient(135deg, transparent 0%, var(--about-purple-soft) 45%, var(--about-green-soft) 100%);
  clip-path: polygon(28% 0, 100% 0, 82% 100%, 0 100%);
  z-index: 0;
  pointer-events: none;
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-purple), var(--accent-green), transparent 80%);
  z-index: 1;
  pointer-events: none;
}
.page-about .about-hero-inner {
  position: relative;
  z-index: 1;
}
.page-about .about-hero-grid {
  display: grid;
  gap: 36px;
  padding-top: 28px;
}
.page-about .about-hero-copy .eyebrow {
  margin-bottom: 16px;
}
.page-about .about-hero-copy h1 {
  font-family: var(--font-head);
  font-size: clamp(2.1rem, 7vw, 3.6rem);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.02em;
  margin: 0 0 20px;
  color: var(--text-main);
}
.page-about .about-hero-lead {
  max-width: 660px;
  margin: 0 0 28px;
  color: var(--text-sub);
  font-size: 1rem;
  line-height: 1.8;
}
.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-about .about-hero-meta {
  display: flex;
  flex-direction: row;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
}
.page-about .about-hero-code {
  font-family: var(--font-body);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--text-sub);
  border: 1px solid var(--border);
  padding: 6px 12px;
  border-radius: 4px;
  white-space: nowrap;
}
.page-about .about-hero-meta .vertical-note {
  writing-mode: vertical-rl;
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  color: var(--text-sub);
  border-left: 1px solid var(--border);
  padding-left: 8px;
  min-height: 120px;
}

/* ===== 数据带 ===== */
.page-about .about-stats {
  position: relative;
  background: var(--bg-panel);
  padding: 40px 0;
}
.page-about .about-stats::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--accent-purple), var(--accent-green), transparent);
}
.page-about .about-stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px 20px;
}
.page-about .about-stat {
  padding-left: 16px;
  border-left: 2px solid var(--border);
  transition: border-color 0.3s ease;
}
.page-about .about-stat:hover {
  border-left-color: var(--accent-green);
}
.page-about .about-stat-value {
  display: block;
  font-family: var(--font-head);
  font-size: clamp(1.7rem, 5vw, 2.6rem);
  font-weight: 900;
  line-height: 1.15;
  color: var(--text-main);
}
.page-about .about-stat-value::after {
  content: "";
  display: block;
  width: 28px;
  height: 3px;
  background: var(--accent-green);
  margin-top: 8px;
}
.page-about .about-stat-label {
  display: block;
  margin-top: 8px;
  color: var(--text-sub);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
}

/* ===== 章节基础系统 ===== */
.page-about .about-section {
  position: relative;
  padding: 80px 0;
  overflow: hidden;
}
.page-about .about-section-grid {
  display: grid;
  gap: 36px;
}
.page-about .about-section-index {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}
.page-about .about-section-index .section-index {
  font-family: var(--font-head);
  font-size: clamp(3.6rem, 12vw, 7.5rem);
  font-weight: 900;
  line-height: 0.85;
  letter-spacing: -0.04em;
  background: linear-gradient(135deg, var(--accent-purple) 0%, #c77dff 60%, var(--accent-green) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  user-select: none;
}
.page-about .about-section-index .vertical-note {
  writing-mode: vertical-rl;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--text-sub);
  border-left: 1px solid var(--border);
  padding-left: 8px;
  min-height: 100px;
}
.page-about .about-section-content .eyebrow {
  margin-bottom: 10px;
}
.page-about .about-section-content h2 {
  font-family: var(--font-head);
  font-size: clamp(1.6rem, 4.5vw, 2.3rem);
  font-weight: 900;
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin: 0 0 20px;
  color: var(--text-main);
}
.page-about .about-prose p {
  margin: 0 0 16px;
  color: var(--text-main);
  font-size: 1rem;
  line-height: 1.85;
}
.page-about .about-prose p:last-child {
  margin-bottom: 0;
}

/* ===== 01 品牌理念 ===== */
.page-about .about-philosophy {
  background: repeating-linear-gradient(-45deg, transparent 0 14px, rgba(255, 255, 255, 0.014) 14px 15px);
}
.page-about .about-philosophy-figure {
  margin: 32px 0 0;
}
.page-about .about-philosophy-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  object-fit: cover;
}
.page-about .about-philosophy-figure figcaption {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
  color: var(--text-sub);
  font-size: 0.85rem;
}
.page-about .about-philosophy-figure figcaption::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--accent-green);
  flex-shrink: 0;
}

/* ===== 02 发展里程碑 ===== */
.page-about .about-milestones {
  background: var(--bg-panel);
}
.page-about .about-milestones::before {
  content: "";
  position: absolute;
  top: -10%;
  right: -35%;
  width: 70%;
  height: 120%;
  background: linear-gradient(180deg, rgba(138, 43, 226, 0.08) 0%, transparent 70%);
  transform: skewX(-15deg);
  pointer-events: none;
}
.page-about .about-milestones .about-section-grid {
  position: relative;
  z-index: 1;
}
.page-about .about-milestones-intro {
  margin: 0 0 36px;
  color: var(--text-sub);
  font-size: 1rem;
  line-height: 1.75;
}
.page-about .about-timeline {
  position: relative;
  list-style: none;
  padding: 0;
  margin: 0;
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--accent-purple) 0%, var(--accent-green) 70%, transparent 100%);
  border-radius: 2px;
}
.page-about .about-timeline-item {
  position: relative;
  padding: 0 0 28px 36px;
}
.page-about .about-timeline-item:last-child {
  padding-bottom: 0;
}
.page-about .about-timeline-node {
  position: absolute;
  left: 0;
  top: 4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent-green);
  border: 3px solid var(--bg-panel);
  box-shadow: 0 0 14px rgba(0, 255, 135, 0.55);
}
.page-about .about-timeline-content {
  background: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}
.page-about .about-timeline-content:hover,
.page-about .about-timeline-content:focus-within {
  border-color: var(--accent-purple);
  transform: translateX(4px);
  box-shadow: 0 0 20px var(--about-purple-soft);
}
.page-about .about-timeline-year {
  display: inline-block;
  padding: 4px 12px;
  margin-bottom: 10px;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--accent-green);
  border: 1px solid var(--border);
  border-radius: 999px;
  white-space: nowrap;
}
.page-about .about-timeline-content h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 1.12rem;
  font-weight: 900;
  color: var(--text-main);
}
.page-about .about-timeline-content p {
  margin: 0;
  color: var(--text-sub);
  font-size: 0.94rem;
  line-height: 1.7;
}
.page-about .about-milestones-figure {
  margin: 40px 0 0;
}
.page-about .about-milestones-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  object-fit: cover;
}
.page-about .about-milestones-figure figcaption {
  margin-top: 10px;
  color: var(--text-sub);
  font-size: 0.85rem;
  text-align: right;
}

/* ===== 03 资质与体系 ===== */
.page-about .about-qualifications {
  background:
    radial-gradient(circle at 85% 20%, rgba(138, 43, 226, 0.08), transparent 50%),
    var(--bg-deep);
}
.page-about .about-qualifications-grid {
  display: grid;
  gap: 16px;
}
.page-about .about-qualification-card {
  position: relative;
  background: var(--about-panel);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent-purple);
  border-radius: var(--radius);
  padding: 22px 20px;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.page-about .about-qualification-card:hover,
.page-about .about-qualification-card:focus-within {
  transform: translateY(-4px);
  border-color: var(--accent-purple);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}
.page-about .about-qualification-icon {
  display: block;
  margin-bottom: 14px;
  font-size: 1.6rem;
  line-height: 1;
  color: var(--accent-green);
}
.page-about .about-qualification-card h3 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 1.08rem;
  font-weight: 900;
  color: var(--text-main);
}
.page-about .about-qualification-card p {
  margin: 0;
  color: var(--text-sub);
  font-size: 0.94rem;
  line-height: 1.7;
}

/* ===== 04 团队与生态 ===== */
.page-about .about-ecosystem {
  background: linear-gradient(120deg, transparent 0%, rgba(138, 43, 226, 0.07) 100%);
}
.page-about .about-ecosystem-grid {
  display: grid;
  gap: 28px;
}
.page-about .about-ecosystem-text h3 {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-size: 1.15rem;
  font-weight: 900;
  color: var(--text-main);
}
.page-about .about-ecosystem-text h3:not(:first-child) {
  margin-top: 24px;
}
.page-about .about-ecosystem-text p {
  margin: 0;
  color: var(--text-sub);
  font-size: 0.98rem;
  line-height: 1.8;
}
.page-about .about-ecosystem-figure {
  margin: 0;
}
.page-about .about-ecosystem-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  object-fit: cover;
}
.page-about .about-ecosystem-figure figcaption {
  margin-top: 10px;
  color: var(--text-sub);
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 10px;
}
.page-about .about-ecosystem-figure figcaption::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--accent-green);
  flex-shrink: 0;
}

/* ===== CTA ===== */
.page-about .about-cta {
  position: relative;
  padding: 64px 0;
  background: var(--bg-dark);
  border-top: 1px solid var(--border);
  overflow: hidden;
}
.page-about .about-cta::before {
  content: "";
  position: absolute;
  top: 0;
  left: -10%;
  width: 120%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-purple), var(--accent-green), transparent);
}
.page-about .about-cta-inner {
  position: relative;
  z-index: 1;
}
.page-about .about-cta-inner .eyebrow {
  margin-bottom: 12px;
}
.page-about .about-cta-inner h2 {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-size: clamp(1.6rem, 4.5vw, 2.2rem);
  font-weight: 900;
  color: var(--text-main);
}
.page-about .about-cta-inner p {
  max-width: 620px;
  margin: 0 0 28px;
  color: var(--text-sub);
  font-size: 0.98rem;
  line-height: 1.75;
}
.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ===== 响应式：桌面端 ===== */
@media (min-width: 768px) {
  .page-about .about-stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about .about-section {
    padding: 100px 0;
  }
  .page-about .about-section-grid {
    grid-template-columns: 160px 1fr;
    gap: 48px;
  }
  .page-about .about-qualifications-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .page-about .about-ecosystem-grid {
    grid-template-columns: 1fr 380px;
    align-items: center;
    gap: 40px;
  }
  .page-about .about-ecosystem-figure img {
    height: 300px;
    object-fit: cover;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero {
    padding: 88px 0 72px;
  }
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 48px;
    align-items: flex-end;
  }
  .page-about .about-hero-meta {
    justify-self: flex-end;
    flex-direction: column;
    align-items: flex-end;
    justify-content: space-between;
    gap: 40px;
    min-height: 220px;
  }
  .page-about .about-milestones-figure {
    margin: 44px 0 0 40px;
  }
  .page-about .about-timeline {
    max-width: 780px;
  }
  .page-about .about-timeline-item {
    padding-left: 42px;
  }
  .page-about .about-cta {
    padding: 80px 0;
  }
}