/* ==================== Banner ==================== */
.page-banner {
  min-height: 400px;
  height: auto;
  padding: 210px 20px 120px; /* top 含 90px header 偏移 */
  background: #000000;
  color: #fff;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  width: 120%;
  height: 200%;
  transform: translateX(-50%);
  background: radial-gradient(ellipse at center, rgba(255,255,255,0.06) 0%, transparent 60%);
  pointer-events: none;
}
.page-banner::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 50%;
  height: 100%;
  background: radial-gradient(circle at 80% 20%, rgba(255,255,255,0.04) 0%, transparent 50%);
  pointer-events: none;
}

.page-banner .container {
  max-width: 900px;
  width: 100%;
}

.banner-desc {
  font-size: 22px;
  font-weight: 400;
  color: #fff;
  margin-bottom: 15px;
  line-height: 1.5;
}

.banner-sub {
  font-size: 16px;
  font-weight: 400;
  color: rgba(255,255,255,0.9);
  margin-bottom: 30px;
  line-height: 1.6;
}

.banner-tags {
  display: flex;
  gap: 15px;
  justify-content: center;
  flex-wrap: wrap;
}

.banner-tag {
  padding: 8px 24px;
  background: rgba(255,255,255,0.2);
  color: #fff;
  font-size: 14px;
  border-radius: var(--radius-round);
  border: 1px solid rgba(255,255,255,0.3);
  transition: all 0.3s;
}

.banner-tag:hover {
  background: rgba(255,255,255,0.3);
}

/* ==================== 返回顶部 ==================== */
.backtop {
  position: fixed;
  right: 30px;
  bottom: 80px;
  width: 45px;
  height: 45px;
  background: var(--gold, #0052D9);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 15px rgba(0,82,217,0.3);
  z-index: 100;
  transition: all 0.3s;
}

.backtop:hover {
  background: var(--gold-dark, #0040B0);
  transform: translateY(-3px);
}

.backtop img {
  width: 20px;
  height: 20px;
  filter: brightness(0) invert(1);
}

/* ==================== 核心能力区块 ==================== */
.features-section {
  background: linear-gradient(180deg, #FFFFFF 0%, #FAFBFC 100%) !important;
  padding: 80px 0;
}

.features-section .container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

.features-section .section-header {
  text-align: center;
  margin-bottom: 50px;
}

.features-section .section-header h2 {
  font-size: 32px;
  font-weight: 600;
  color: var(--text-primary, #1D2129);
  margin-bottom: 15px;
}

.features-section .section-header .lead {
  font-size: 16px;
  color: var(--text-secondary, #4E5969);
  max-width: 700px;
  margin: 0 auto;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.feature-card {
  background: var(--bg-card, #FFFFFF);
  padding: 40px 30px;
  border-radius: var(--radius-2xl);
  text-align: center;
  border: 1px solid var(--border-color, #E5E6EB);
  transition: all 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 15px 40px rgba(0,82,217,0.12);
  border-color: var(--gold, #0052D9);
}

.feature-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card, #FFFFFF);
  border-radius: var(--radius-full);
  transition: all 0.3s;
}

.feature-card:hover .feature-icon {
  background: var(--gold, #0052D9);
}

.feature-card:hover .feature-icon img {
  filter: brightness(0) invert(1);
}

.feature-icon img {
  width: 48px;
  height: 48px;
}

.feature-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary, #1D2129);
  margin-bottom: 12px;
}

.feature-desc {
  font-size: 15px;
  color: var(--text-secondary, #4E5969);
  line-height: 1.7;
}

/* ==================== 关于我们区块 ==================== */
.about-section {
  background: linear-gradient(180deg, #F8F9FB 0%, #F2F4F7 100%) !important;
  padding: 80px 0;
}

.about-section .container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

.about-section .section-header {
  text-align: center;
  margin-bottom: 50px;
}

.about-section .section-header h2 {
  font-size: 32px;
  font-weight: 600;
  color: var(--text-primary, #1D2129);
  margin-bottom: 15px;
}

.about-section .section-header .lead {
  font-size: 16px;
  color: var(--text-secondary, #4E5969);
}

.about-content {
  max-width: 900px;
  margin: 0 auto 50px;
}

.about-intro {
  text-align: center;
  margin-bottom: 40px;
}

.about-intro p {
  font-size: 16px;
  color: var(--text-secondary, #4E5969);
  line-height: 1.8;
}

.about-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}

.about-card {
  background: var(--bg-card, #FFFFFF);
  padding: 30px 20px;
  border-radius: var(--radius-xl);
  text-align: center;
  border: 1px solid var(--border-color, #E5E6EB);
  transition: all 0.3s;
}

.about-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0,82,217,0.08);
  border-color: var(--gold, #0052D9);
}

.about-card-icon {
  width: 50px;
  height: 50px;
  margin: 0 auto 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card, #FFFFFF);
  border-radius: var(--radius-full);
  color: var(--gold, #0052D9);
  transition: all 0.3s;
}

.about-card:hover .about-card-icon {
  background: var(--gold, #0052D9);
  color: #fff;
}

.about-card-num {
  font-size: 32px;
  font-weight: 700;
  color: var(--gold, #0052D9);
  margin-bottom: 5px;
}

.about-card-label {
  font-size: 14px;
  color: var(--text-secondary, #4E5969);
}

.about-products {
  background: var(--bg-card, #FFFFFF);
  padding: 40px;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-color, #E5E6EB);
  text-align: center;
  margin-bottom: 30px;
}

.about-products h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary, #1D2129);
  margin-bottom: 30px;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  text-align: center;
}

.product-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 24px 16px;
  background: var(--bg-card, #FFFFFF);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-color, #E5E6EB);
  text-decoration: none;
  transition: all 0.3s ease;
}

.product-card:hover {
  border-color: var(--gold, #0052D9);
  box-shadow: 0 4px 20px rgba(0,82,217, 0.15);
  transform: translateY(-4px);
}

.product-icon {
  width: 56px;
  height: 56px;
  margin-bottom: 16px;
}

.product-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.product-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary, #1D2129);
  margin-bottom: 8px;
}

.product-desc {
  font-size: 13px;
  color: var(--text-secondary, #4E5969);
  line-height: 1.5;
}

.about-services {
  background: var(--bg-card, #FFFFFF);
  padding: 30px;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-color, #E5E6EB);
  text-align: center;
}

.about-services h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary, #1D2129);
  margin-bottom: 12px;
}

.service-intro {
  font-size: 15px;
  color: var(--text-secondary, #4E5969);
  line-height: 1.7;
  max-width: 750px;
  margin: 0 auto;
}

/* ==================== 价值观区块 ==================== */
.values-section {
  background: linear-gradient(180deg, #FFFFFF 0%, #F9FAFB 100%) !important;
  padding: 80px 0;
}

.values-section .container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

.values-section .section-header {
  text-align: center;
  margin-bottom: 50px;
}

.values-section .section-header h2 {
  font-size: 32px;
  font-weight: 600;
  color: var(--text-primary, #1D2129);
  margin-bottom: 15px;
}

.values-section .section-header .lead {
  font-size: 16px;
  color: var(--text-secondary, #4E5969);
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  max-width: 1000px;
  margin: 0 auto;
}

.value-card {
  background: var(--bg-card, #FFFFFF);
  padding: 45px 30px;
  border-radius: var(--radius-2xl);
  text-align: center;
  border: 1px solid var(--border-color, #E5E6EB);
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
}

.value-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(135deg, #0040B0, #0052D9);
  transform: scaleX(0);
  transition: transform 0.3s;
}

.value-card:hover::before {
  transform: scaleX(1);
}

.value-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 35px rgba(0,82,217,0.12);
}

.value-num {
  width: 50px;
  height: 50px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #0040B0, #0052D9);
  color: #fff;
  font-size: 20px;
  font-weight: 700;
  border-radius: var(--radius-full);
}

.value-card h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary, #1D2129);
  margin-bottom: 12px;
}

.value-card p {
  font-size: 15px;
  color: var(--text-secondary, #4E5969);
  line-height: 1.7;
  margin: 0;
}

/* ==================== 发展历程区块 ==================== */
.history-section {
  background: linear-gradient(180deg, #F4F6F8 0%, #EDEFF2 100%) !important;
  padding: 80px 0;
}

.history-section .container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

.history-section .section-header {
  text-align: center;
  margin-bottom: 50px;
}

.history-section .section-header h2 {
  font-size: 32px;
  font-weight: 600;
  color: var(--text-primary, #1D2129);
  margin-bottom: 15px;
}

.history-section .section-header .lead {
  font-size: 16px;
  color: var(--text-secondary, #4E5969);
}

.history-container {
  max-width: 1000px;
  margin: 0 auto;
}

.history-scroll-wrapper {
  position: relative;
  overflow: hidden;
}

.history-scroll {
  overflow-x: auto;
  overflow-y: hidden;
  padding-bottom: 10px;
}

.history-scroll::-webkit-scrollbar {
  height: 6px;
}

.history-scroll::-webkit-scrollbar-track {
  background: var(--bg-card, #FFFFFF);
  border-radius: var(--radius-sm);
}

.history-scroll::-webkit-scrollbar-thumb {
  background: var(--gold, #0052D9);
  border-radius: var(--radius-sm);
}

.history-items {
  display: flex;
  gap: 20px;
  width: max-content;
}

.history-box {
  flex-shrink: 0;
  width: 280px;
  background: var(--bg-card, #FFFFFF);
  border: 1px solid var(--gold, #0052D9);
  border-radius: var(--radius-xl);
  padding: 25px;
  min-height: 140px;
  transition: all 0.3s;
  display: flex;
  flex-direction: column;
}

.history-box:hover {
  box-shadow: 0 8px 25px rgba(0,82,217,0.12);
  transform: translateY(-3px);
}

.history-year {
  display: inline-block;
  background: var(--gold, #0052D9);
  color: #fff;
  font-size: 20px;
  font-weight: 700;
  padding: 6px 16px;
  border-radius: var(--radius-round);
  margin-bottom: 16px;
  align-self: flex-start;
}

.history-box p {
  font-size: 14px;
  color: var(--text-secondary, #4E5969);
  line-height: 1.7;
  margin: 0;
}

.history-tabs {
  margin-top: 40px;
  display: flex;
  border-top: 3px solid var(--gold, #0052D9);
  justify-content: space-around;
}

.history-tab {
  font-size: 18px;
  font-weight: 600;
  padding: 20px 30px;
  position: relative;
  cursor: pointer;
  color: var(--text-secondary, #4E5969);
  transition: color 0.3s;
}

.history-tab:hover {
  color: var(--gold, #0052D9);
}

.history-tab::after {
  content: "";
  position: absolute;
  top: -11px;
  left: 50%;
  transform: translateX(-50%);
  width: 16px;
  height: 16px;
  border-radius: var(--radius-full);
  background: #ccc;
  transition: all 0.3s;
}

.history-tab.active {
  color: var(--gold, #0052D9);
}

.history-tab.active::before {
  content: "";
  position: absolute;
  top: -20px;
  left: 50%;
  transform: translateX(-50%);
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: rgba(0,82,217,0.2);
}

.history-tab.active::after {
  background: var(--gold, #0052D9);
}

/* ==================== 合作品牌区块 ==================== */
.partner-section {
  background: linear-gradient(180deg, #F8F9FB 0%, #F1F3F6 100%) !important;
  padding: 80px 0;
}

.partner-section .container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

.partner-section .section-header {
  text-align: center;
  margin-bottom: 50px;
}

.partner-section .section-header h2 {
  font-size: 32px;
  font-weight: 600;
  color: var(--text-primary, #1D2129);
  margin-bottom: 15px;
}

.partner-section .section-header .lead {
  font-size: 16px;
  color: var(--text-secondary, #4E5969);
  max-width: 700px;
  margin: 0 auto;
}

.partner-brand-item {
  margin-bottom: 20px;
}

.partner-brand-item-header {
  padding: 12px 20px;
  background: var(--gold, #0052D9);
  color: #fff;
  font-weight: 600;
  font-size: 16px;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.partner-brand-row {
  display: flex;
  flex-wrap: wrap;
  background: var(--bg-card, #FFFFFF);
  border: 1px solid var(--border-color, #E5E6EB);
  border-top: none;
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  padding: 15px 10px;
}

.partner-brand-row img {
  max-width: 120px;
  height: 60px;
  margin: 10px 20px;
  object-fit: contain;
  transition: all 0.3s;
}

.partner-brand-row img:hover {
  transform: scale(1.05);
  opacity: 1;
}

/* ==================== 响应式 ==================== */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }

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

  .values-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }

  .product-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }
}

@media (max-width: 768px) {
  .page-banner {
    min-height: 350px;
    padding: 170px 15px 80px; /* top 含 90px header 偏移 */
  }
  
  
  .banner-desc {
    font-size: 18px;
  }
  
  .banner-sub {
    font-size: 14px;
  }
  
  .features-section,
  .about-section,
  .values-section,
  .history-section,
  .partner-section {
    padding: 60px 0;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin: 0 auto;
  }
  
  .feature-card {
    padding: 30px 20px;
  }
  
  .about-cards {
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
  }
  
  .about-card {
    padding: 20px 15px;
  }
  
  .about-card-num {
    font-size: 26px;
  }
  
  .about-products {
    padding: 25px 15px;
  }

  .product-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
  }

  .product-card {
    padding: 20px 12px;
  }

  .product-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 12px;
  }

  .product-name {
    font-size: 14px;
  }

  .product-desc {
    font-size: 12px;
  }
  
  .values-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin: 0 auto;
  }
  
  .value-card {
    padding: 30px 20px;
  }
  
  .history-box {
    width: 250px;
    padding: 25px;
  }
  
  .partner-brand-row img {
    max-width: 100px;
    height: 50px;
    margin: 8px 15px;
  }
  
  .history-tab {
    font-size: 14px;
    padding: 18px 15px;
  }
}

@media (max-width: 480px) {
  .about-cards {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .about-card {
    padding: 15px 10px;
  }

  .about-card-icon {
    width: 40px;
    height: 40px;
    margin-bottom: 10px;
  }

  .about-card-icon svg {
    width: 20px;
    height: 20px;
  }

  .about-card-num {
    font-size: 22px;
  }

  .banner-tags {
    flex-direction: column;
    gap: 10px;
  }

  .product-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .product-card {
    padding: 16px 10px;
  }

  .product-icon {
    width: 40px;
    height: 40px;
    margin-bottom: 10px;
  }

  .product-name {
    font-size: 13px;
  }

  .product-desc {
    font-size: 11px;
  }
}