/* ========================================
   关于我们页面样式
   ======================================== */

/* ---- 页面 Banner ---- */
.page-banner {
  position: relative;
  padding: 160px 0 80px;
  background: linear-gradient(135deg, #0A0A0A 0%, #1a0a0c 50%, #0A0A0A 100%);
  text-align: center;
  overflow: hidden;
}

.page-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 50% 50%, rgba(214, 0, 28, 0.08) 0%, transparent 60%);
}

.page-banner-content {
  position: relative;
  z-index: 1;
}

.page-banner h1 {
  font-size: 48px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 16px;
}

.page-banner h1 span {
  color: var(--color-red);
}

.page-banner p {
  font-size: 18px;
  color: var(--color-gray-light);
  max-width: 560px;
  margin: 0 auto;
}

.breadcrumb {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 24px;
  font-size: 14px;
  color: var(--color-gray-mid);
}

.breadcrumb a:hover {
  color: var(--color-red);
}

/* ---- 公司简介 ---- */
.about-intro {
  background-color: var(--color-black);
}

.about-intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-intro-text h3 {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 20px;
  line-height: 1.3;
}

.about-intro-text h3 span {
  color: var(--color-red);
}

.about-intro-text p {
  font-size: 16px;
  color: var(--color-gray-light);
  line-height: 1.9;
  margin-bottom: 16px;
}

.about-intro-visual {
  position: relative;
  min-height: 400px;
  background: linear-gradient(135deg, var(--color-gray-dark) 0%, #151e2e 100%);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.about-intro-visual::before {
  content: '';
  position: absolute;
  width: 300px;
  height: 300px;
  border: 1px solid rgba(214, 0, 28, 0.15);
  border-radius: 50%;
  animation: rotate 25s linear infinite;
}

.about-intro-visual::after {
  content: '';
  position: absolute;
  width: 200px;
  height: 200px;
  border: 1px solid rgba(214, 0, 28, 0.1);
  border-radius: 50%;
  animation: rotate 18s linear infinite reverse;
}

.about-visual-center {
  font-size: 80px;
  font-weight: 800;
  color: var(--color-red);
  opacity: 0.15;
  z-index: 1;
  letter-spacing: 4px;
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* 愿景使命 */
.mission-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 60px;
}

.mission-card {
  background: var(--color-gray-dark);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 40px 28px;
  text-align: center;
  transition: all 0.3s ease;
}

.mission-card:hover {
  border-color: rgba(214, 0, 28, 0.3);
  transform: translateY(-4px);
}

.mission-card h4 {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-red);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 16px;
}

.mission-card p {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-white);
  line-height: 1.5;
}

/* ---- 企业优势 ---- */
.advantages-section {
  background-color: #0d0d0d;
}

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

.advantage-card {
  background: var(--color-gray-dark);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 40px 32px;
  transition: all 0.3s ease;
}

.advantage-card:hover {
  border-color: rgba(214, 0, 28, 0.3);
  transform: translateY(-4px);
}

.advantage-icon {
  width: 56px;
  height: 56px;
  background: rgba(214, 0, 28, 0.1);
  border: 1px solid rgba(214, 0, 28, 0.2);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--color-red);
}

.advantage-card h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 12px;
}

.advantage-card p {
  font-size: 15px;
  color: var(--color-gray-light);
  line-height: 1.7;
}

/* ---- 核心价值观 ---- */
.values-inline {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-top: 48px;
  flex-wrap: wrap;
}

.value-inline-item {
  display: flex;
  align-items: center;
  gap: 12px;
}

.value-inline-dot {
  width: 8px;
  height: 8px;
  background: var(--color-red);
  border-radius: 50%;
}

.value-inline-item span {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-white);
}

/* ---- 发展历程 ---- */
.timeline-section {
  background-color: var(--color-black);
}

.timeline {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  width: 2px;
  height: 100%;
  background: linear-gradient(to bottom, var(--color-red), rgba(214, 0, 28, 0.1));
  transform: translateX(-50%);
}

.timeline-item {
  position: relative;
  display: flex;
  justify-content: flex-end;
  padding-right: calc(50% + 40px);
  margin-bottom: 60px;
}

.timeline-item:nth-child(even) {
  justify-content: flex-start;
  padding-right: 0;
  padding-left: calc(50% + 40px);
}

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

.timeline-dot {
  position: absolute;
  left: 50%;
  top: 8px;
  width: 16px;
  height: 16px;
  background: var(--color-red);
  border: 3px solid var(--color-black);
  border-radius: 50%;
  transform: translateX(-50%);
  z-index: 2;
}

.timeline-content {
  background: var(--color-gray-dark);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 28px 32px;
  max-width: 380px;
  transition: all 0.3s ease;
}

.timeline-content:hover {
  border-color: rgba(214, 0, 28, 0.3);
}

.timeline-year {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-red);
  margin-bottom: 8px;
  letter-spacing: 1px;
}

.timeline-content h4 {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 10px;
}

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

/* ========================================
   响应式
   ======================================== */
@media (max-width: 1023px) {
  .page-banner {
    padding: 140px 0 60px;
  }

  .page-banner h1 {
    font-size: 38px;
  }

  .about-intro-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .about-intro-visual {
    min-height: 300px;
    order: -1;
  }

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

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

  .values-inline {
    gap: 24px;
  }

  .timeline::before {
    left: 20px;
  }

  .timeline-item,
  .timeline-item:nth-child(even) {
    justify-content: flex-start;
    padding-right: 0;
    padding-left: 56px;
  }

  .timeline-dot {
    left: 20px;
  }

  .timeline-content {
    max-width: 100%;
  }
}

@media (max-width: 767px) {
  .page-banner {
    padding: 120px 0 48px;
  }

  .page-banner h1 {
    font-size: 30px;
  }

  .page-banner p {
    font-size: 16px;
  }

  .about-intro-text h3 {
    font-size: 24px;
  }

  .about-intro-visual {
    min-height: 240px;
  }

  .about-visual-center {
    font-size: 48px;
  }

  .mission-card {
    padding: 32px 24px;
  }

  .mission-card p {
    font-size: 18px;
  }

  .advantage-card {
    padding: 32px 24px;
  }

  .values-inline {
    flex-direction: column;
    align-items: center;
    gap: 16px;
  }

  .timeline-content {
    padding: 20px 24px;
  }
}