/* ========================================
   关于我们页面专用样式
   ======================================== */

/* ---------- Hero ---------- */
.about-hero {
  padding: 140px 0 80px;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.about-hero::before {
  content: "";
  position: absolute;
  top: -40%;
  right: -15%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(26, 86, 219, 0.2) 0%, transparent 70%);
  border-radius: 50%;
}

.about-hero::after {
  content: "";
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.1) 0%, transparent 70%);
  border-radius: 50%;
}

.about-hero-content {
  position: relative;
  z-index: 1;
  max-width: 700px;
}

.about-hero .badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(255, 255, 255, 0.1);
  color: var(--accent);
  border-radius: 20px;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 24px;
}

.about-hero h1 {
  font-size: 48px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.about-hero p {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.8;
  max-width: 560px;
}

/* ---------- Profile Section ---------- */
.profile-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 48px;
  align-items: start;
}

.profile-main h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: 20px;
}

.profile-main p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: 16px;
}

.info-card {
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  position: sticky;
  top: 96px;
}

.info-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--primary-light);
}

.info-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.info-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.info-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.info-value {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
}

/* ---------- Culture Section ---------- */
.culture-section {
  background: var(--bg-light);
}

.culture-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.culture-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  text-align: center;
  transition: var(--transition);
}

.culture-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.culture-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  background: var(--primary-light);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.culture-icon svg {
  width: 32px;
  height: 32px;
  color: var(--primary);
}

.culture-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: 12px;
}

.culture-card p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ---------- Timeline Section ---------- */
.timeline {
  max-width: 720px;
  margin: 0 auto;
  position: relative;
  padding-left: 40px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--primary), var(--accent));
  border-radius: 1px;
}

.timeline-item {
  position: relative;
  margin-bottom: 40px;
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: -33px;
  top: 6px;
  width: 14px;
  height: 14px;
  background: var(--primary);
  border: 3px solid var(--bg-white);
  border-radius: 50%;
  box-shadow: 0 0 0 3px var(--primary-light);
}

.timeline-content {
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: var(--transition);
}

.timeline-content:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

.timeline-date {
  display: inline-block;
  padding: 4px 12px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 10px;
}

.timeline-content h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: 8px;
}

.timeline-content p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ---------- Certifications Section ---------- */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.cert-card {
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
  transition: var(--transition);
}

.cert-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.cert-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  background: var(--primary-light);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cert-icon svg {
  width: 28px;
  height: 28px;
  color: var(--primary);
}

.cert-card h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: 6px;
}

.cert-card p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .profile-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .info-card {
    position: static;
  }

  .culture-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

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

@media (max-width: 768px) {
  .about-hero h1 {
    font-size: 32px;
  }

  .about-hero p {
    font-size: 16px;
  }

  .profile-main h2 {
    font-size: 24px;
  }

  .cert-grid {
    grid-template-columns: 1fr;
  }

  .timeline {
    padding-left: 32px;
  }

  .timeline-dot {
    left: -25px;
  }
}