/* ===== 品牌概况页 About ===== */
.page-about {
  background: var(--color-bg);
  color: var(--color-white);
  font-family: var(--font-body);
  line-height: 1.7;
  overflow-x: hidden;
}

/* 面包屑 */
.page-about .breadcrumb {
  padding: 18px 0 0;
}

.page-about .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-index);
  font-size: 13px;
  font-weight: 300;
  color: var(--color-muted);
}

.page-about .breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin-right: 8px;
  color: rgba(167, 139, 250, 0.55);
}

.page-about .breadcrumb-link {
  color: var(--color-neon);
  text-decoration: none;
  transition: color var(--transition);
}

.page-about .breadcrumb-link:hover {
  color: var(--color-green);
}

/* Hero */
.page-about .about-hero {
  position: relative;
  padding: 48px 0 72px;
  overflow: hidden;
  border-bottom: var(--border-width) solid rgba(0, 229, 255, 0.3);
  background:
    radial-gradient(ellipse at 75% 12%, rgba(45, 27, 78, 0.9), transparent 58%),
    linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 229, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 255, 0.04) 1px, transparent 1px);
  background-size: 36px 36px;
  pointer-events: none;
}

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

.page-about .about-hero-copy {
  max-width: 680px;
}

.page-about .about-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--color-neon);
  border: 1px solid rgba(0, 229, 255, 0.35);
  background: rgba(0, 229, 255, 0.06);
  padding: 5px 14px;
  border-radius: 999px;
  text-transform: uppercase;
  margin-bottom: 20px;
}

.page-about .about-hero h1 {
  font-family: var(--font-headline);
  font-size: clamp(40px, 8vw, 72px);
  line-height: 1;
  margin: 0 0 12px;
  letter-spacing: 0.01em;
  color: var(--color-white);
  text-shadow: var(--glow-neon);
}

.page-about .about-hero-lead {
  font-family: var(--font-headline);
  font-size: clamp(16px, 2.6vw, 24px);
  color: var(--color-lilac);
  margin: 0 0 16px;
  letter-spacing: 0.04em;
}

.page-about .about-hero-desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-muted);
  max-width: 540px;
  margin: 0 0 28px;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 28px;
}

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

.page-about .about-hero-watermark {
  position: absolute;
  right: -0.04em;
  bottom: -0.16em;
  z-index: 1;
  font-family: var(--font-headline);
  font-size: clamp(120px, 22vw, 260px);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 2px rgba(167, 139, 250, 0.3);
  pointer-events: none;
  user-select: none;
  letter-spacing: -0.04em;
}

/* 通用区块头 */
.page-about .about-section-head {
  margin-bottom: 30px;
}

.page-about .about-section-index {
  font-family: var(--font-index);
  font-size: 12px;
  font-weight: 300;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-neon);
  display: inline-block;
  margin-bottom: 8px;
  border-left: 2px solid var(--color-neon);
  padding-left: 10px;
}

.page-about .about-section-head h2,
.page-about .about-tech-copy h2,
.page-about .about-team-copy h2 {
  font-family: var(--font-headline);
  font-size: clamp(24px, 4vw, 36px);
  line-height: 1.15;
  margin: 0;
  color: var(--color-white);
  letter-spacing: 0.01em;
}

/* 我们是谁 */
.page-about .about-who {
  padding: 64px 0;
  background:
    linear-gradient(rgba(0, 229, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 255, 0.03) 1px, transparent 1px),
    var(--color-bg);
  background-size: 40px 40px, 40px 40px, auto;
}

.page-about .about-who-grid {
  display: grid;
  gap: 32px;
}

.page-about .about-who-copy p {
  margin: 0 0 16px;
  color: var(--color-muted);
  font-size: 15px;
}

.page-about .about-who-copy p strong {
  color: var(--color-white);
}

.page-about .about-who-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  align-self: center;
}

.page-about .about-stat-item {
  background: var(--color-panel);
  border: var(--border-width) solid rgba(167, 139, 250, 0.28);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px 14px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: transform var(--transition), box-shadow var(--transition);
}

.page-about .about-stat-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 36px rgba(0, 229, 255, 0.18);
}

.page-about .about-stat-num {
  font-family: var(--font-headline);
  font-size: 30px;
  line-height: 1;
  color: var(--color-neon);
  text-shadow: var(--glow-neon);
}

.page-about .about-stat-label {
  font-size: 12px;
  color: var(--color-muted);
  font-family: var(--font-index);
  line-height: 1.5;
}

/* 发展里程碑 */
.page-about .about-timeline {
  padding: 64px 0;
  background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
  border-top: 1px solid rgba(0, 229, 255, 0.15);
  border-bottom: 1px solid rgba(0, 229, 255, 0.15);
}

.page-about .about-timeline-wrap {
  position: relative;
  padding-left: 30px;
}

.page-about .about-timeline-line {
  position: absolute;
  left: 8px;
  top: 14px;
  bottom: 14px;
  width: 3px;
  border-radius: 999px;
  background: linear-gradient(to bottom, var(--color-neon), var(--color-panel) 70%, transparent);
}

.page-about .about-milestone-card {
  position: relative;
  display: grid;
  grid-template-columns: 62px 1fr;
  gap: 14px;
  margin-bottom: 26px;
  padding: 20px 16px;
  background: rgba(45, 27, 78, 0.72);
  border: var(--border-width) solid rgba(167, 139, 250, 0.24);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
  transition: border-color var(--transition), background var(--transition);
}

.page-about .about-milestone-card:hover {
  border-color: rgba(0, 229, 255, 0.45);
  background: rgba(45, 27, 78, 0.9);
}

.page-about .about-milestone-card::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 34px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--color-neon);
  border: 2px solid var(--color-bg);
  box-shadow: var(--glow-neon);
}

.page-about .about-milestone-year {
  font-family: var(--font-headline);
  font-size: 28px;
  line-height: 1;
  color: var(--color-neon);
  text-shadow: var(--glow-neon);
  justify-self: start;
}

.page-about .about-milestone-content h3 {
  font-family: var(--font-headline);
  font-size: 17px;
  margin: 0 0 10px;
  color: var(--color-white);
  letter-spacing: 0.02em;
}

.page-about .about-milestone-content p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-muted);
  margin: 0 0 12px;
}

.page-about .about-milestone-figure {
  margin: 14px 0 0;
}

.page-about .about-milestone-img,
.page-about .about-team-img,
.page-about .about-cert-img {
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 10px;
  border: 2px solid rgba(0, 229, 255, 0.2);
  box-shadow: var(--shadow);
}

.page-about .about-milestone-caption {
  font-family: var(--font-index);
  font-size: 12px;
  color: var(--color-lilac);
  margin-top: 8px;
  letter-spacing: 0.08em;
}

/* 技术与本地化 */
.page-about .about-tech {
  padding: 64px 0;
  background: var(--color-bg);
}

.page-about .about-tech-grid {
  display: grid;
  gap: 28px;
}

.page-about .about-tech-copy > p {
  font-size: 15px;
  color: var(--color-muted);
  margin: 0 0 16px;
}

.page-about .about-feature-list {
  list-style: none;
  padding: 0;
  margin: 0 0 20px;
}

.page-about .about-feature-list li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 10px;
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
}

.page-about .about-feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.45em;
  width: 9px;
  height: 9px;
  background: var(--color-green);
  box-shadow: var(--glow-green);
  transform: rotate(45deg);
}

.page-about .about-tech-panel {
  padding: 24px 20px;
  background: linear-gradient(135deg, var(--color-panel), rgba(45, 27, 78, 0.6));
  border: var(--border-width) solid rgba(0, 229, 255, 0.3);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 26px 100%, 0 calc(100% - 26px));
}

.page-about .about-tech-panel h3 {
  font-family: var(--font-headline);
  font-size: 18px;
  color: var(--color-white);
  margin: 0 0 14px;
  letter-spacing: 0.02em;
}

.page-about .about-tech-list {
  list-style: none;
  padding: 0;
  margin: 0 0 20px;
}

.page-about .about-tech-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 8px;
  line-height: 1.6;
}

.page-about .about-tech-list li::before {
  content: "▹";
  position: absolute;
  left: 0;
  color: var(--color-green);
}

/* 团队协作 */
.page-about .about-team {
  padding: 64px 0;
  background: var(--color-bg-alt);
  border-top: 1px solid rgba(167, 139, 250, 0.16);
  border-bottom: 1px solid rgba(167, 139, 250, 0.16);
}

.page-about .about-team-grid {
  display: grid;
  gap: 28px;
}

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

.page-about .about-team-img {
  display: block;
  width: 100%;
}

.page-about .about-team-caption {
  font-family: var(--font-index);
  font-size: 12px;
  color: var(--color-lilac);
  margin-top: 10px;
  letter-spacing: 0.08em;
}

.page-about .about-team-copy p {
  font-size: 15px;
  color: var(--color-muted);
  margin: 0 0 14px;
}

/* 资质与承诺 */
.page-about .about-certs {
  padding: 64px 0;
  background: linear-gradient(180deg, var(--color-bg), var(--color-bg-alt) 120%);
}

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

.page-about .about-cert-card {
  padding: 26px 22px;
  background: rgba(45, 27, 78, 0.7);
  border: var(--border-width) solid rgba(167, 139, 250, 0.26);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: transform var(--transition), border-color var(--transition);
}

.page-about .about-cert-card:hover {
  border-color: rgba(0, 229, 255, 0.4);
  transform: translateY(-4px);
}

.page-about .about-cert-icon {
  margin: 0 0 16px;
}

.page-about .about-cert-card h3 {
  font-family: var(--font-headline);
  font-size: 17px;
  color: var(--color-white);
  margin: 0 0 12px;
  letter-spacing: 0.02em;
}

.page-about .about-cert-card p {
  font-size: 14px;
  color: var(--color-muted);
  margin: 0 0 10px;
  line-height: 1.7;
}

.page-about .about-cert-card--promise h3 {
  color: var(--color-green);
}

.page-about .about-promise-list {
  list-style: none;
  padding: 0;
  margin: 0 0 18px;
}

.page-about .about-promise-list li {
  position: relative;
  padding-left: 22px;
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 10px;
  line-height: 1.65;
}

.page-about .about-promise-list li::before {
  content: "✔";
  position: absolute;
  left: 0;
  color: var(--color-green);
  font-size: 13px;
}

.page-about .about-cert-card--promise .btn {
  margin-top: 4px;
}

/* 桌面端增强 */
@media (min-width: 768px) {
  .page-about .about-hero {
    padding: 72px 0 88px;
  }

  .page-about .about-hero-inner {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
  }

  .page-about .about-hero-badges {
    flex-direction: column;
    margin: 0 0 8px;
    align-items: flex-end;
  }

  .page-about .about-who-grid {
    grid-template-columns: 1.2fr 1fr;
    gap: 48px;
  }

  .page-about .about-who-stats {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .page-about .about-stat-item {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding: 18px 22px;
    text-align: left;
  }

  .page-about .about-stat-num {
    font-size: 38px;
  }

  .page-about .about-timeline-wrap {
    padding-left: 60px;
  }

  .page-about .about-timeline-line {
    left: 12px;
  }

  .page-about .about-milestone-card {
    grid-template-columns: 130px 1fr;
    gap: 28px;
    padding: 24px 24px 22px;
    margin-bottom: 32px;
  }

  .page-about .about-milestone-card::before {
    left: -54px;
    width: 16px;
    height: 16px;
    top: 36px;
  }

  .page-about .about-milestone-year {
    font-size: 42px;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    justify-self: end;
  }

  .page-about .about-tech-grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: start;
  }

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

  .page-about .about-team-grid {
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
  }

  .page-about .about-team-img {
    height: 100%;
    object-fit: cover;
  }

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

@media (min-width: 1200px) {
  .page-about .about-timeline-wrap {
    padding-left: 72px;
  }

  .page-about .about-timeline-line {
    left: 14px;
  }

  .page-about .about-milestone-card::before {
    left: -68px;
    width: 18px;
    height: 18px;
    top: 40px;
  }

  .page-about .about-milestone-card {
    grid-template-columns: 160px 1fr;
    gap: 36px;
    padding: 28px 28px 24px;
  }

  .page-about .about-milestone-year {
    font-size: 48px;
  }
}