/* ============================================
   深圳腾骏达科技 - 首页专属样式
   ============================================ */

/* Banner 轮播 */
/* ============================================
   Banner 轮播（支持真实图片）
   ============================================ */

.hero-slider {
  position: relative;
  overflow: hidden;
  width: 100%;
  background: #001f3f; /* 图片加载时的背景色 */
}

.slider-container {
  position: relative;
  width: 100%;
}

.slider-wrapper {
  display: flex;
  transition: transform 0.6s ease-in-out;
}

.slider-slide {
  min-width: 100%;
  flex-shrink: 0;
}

/* ----- 幻灯片内容（背景图片） ----- */
.slide-content {
  position: relative;
  width: 100%;
  height: 600px; /* 固定高度，配合 1920x600 图片 */
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: white;
}

/* 图片加载失败时的备用背景色（逐张设置） */
.slider-slide:nth-child(1) .slide-content {
  background-color: #001f3f;
}
.slider-slide:nth-child(2) .slide-content {
  background-color: #003D7A;
}
.slider-slide:nth-child(3) .slide-content {
  background-color: #1e3a8a;
}

/* ----- 暗色遮罩层（让文字更清晰） ----- */
.slide-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 20, 50, 0.45); /* 半透明深色遮罩 */
  z-index: 1;
  pointer-events: none; /* 让点击事件穿透 */
}

/* ----- 文字内容（在遮罩层之上） ----- */
.slide-text {
  position: relative;
  z-index: 2;
  padding: 0 20px;
}

.slide-text h2 {
  font-size: 2.8rem;
  font-weight: 700;
  margin-bottom: 1rem;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
}

.slide-text p {
  font-size: 1.1rem;
  opacity: 0.95;
  margin-bottom: 2rem;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.3);
}

/* ----- 轮播控制按钮 ----- */
.slider-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0, 0, 0, 0.4);
  color: white;
  border: none;
  font-size: 1.5rem;
  padding: 0.8rem 1rem;
  cursor: pointer;
  border-radius: 50%;
  transition: background 0.3s, transform 0.2s;
  z-index: 10;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.slider-arrow:hover {
  background: rgba(0, 0, 0, 0.7);
  transform: translateY(-50%) scale(1.05);
}

.slider-prev {
  left: 24px;
}

.slider-next {
  right: 24px;
}

/* ----- 指示点 ----- */
.slider-dots {
  display: flex;
  justify-content: center;
  gap: 0.6rem;
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
}

.slider-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.5);
  cursor: pointer;
  transition: background 0.3s, transform 0.2s;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.slider-dot:hover {
  transform: scale(1.2);
}

.slider-dot.active {
  background: #FF6600;
  border-color: #FF6600;
  transform: scale(1.15);
}

/* ============================================
   Banner 响应式适配
   ============================================ */

/* 平板（1024px 及以下） */
@media (max-width: 1024px) {
  .slide-content {
    height: 480px;
  }
  .slide-text h2 {
    font-size: 2.2rem;
  }
  .slide-text p {
    font-size: 1rem;
  }
}

/* 手机（768px 及以下） */
@media (max-width: 768px) {
  .slide-content {
    height: 400px;
  }
  .slide-text h2 {
    font-size: 1.6rem;
  }
  .slide-text p {
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
  }
  .slider-arrow {
    font-size: 1rem;
    padding: 0.5rem 0.7rem;
  }
  .slider-prev {
    left: 10px;
  }
  .slider-next {
    right: 10px;
  }
  .slider-dot {
    width: 10px;
    height: 10px;
  }
  .slider-dots {
    bottom: 16px;
    gap: 0.4rem;
  }
}

/* 小手机（480px 及以下） */
@media (max-width: 480px) {
  .slide-content {
    height: 320px;
  }
  .slide-text h2 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
  }
  .slide-text p {
    font-size: 0.75rem;
    margin-bottom: 1rem;
  }
  .slide-text .btn {
    padding: 0.4rem 1rem;
    font-size: 0.75rem;
  }
  .slider-arrow {
    display: none; /* 小屏手机上隐藏箭头，用滑动切换 */
  }
}
.slider-container { position: relative; }
.slider-wrapper { display: flex; transition: transform 0.6s ease-in-out; }
.slider-slide { min-width: 100%; }
.slide-content { padding: 5rem 0; text-align: center; color: white; }
.slide-content h2 { font-size: 2.8rem; font-weight: 700; margin-bottom: 1rem; }
.slide-content p { font-size: 1.1rem; opacity: 0.9; margin-bottom: 2rem; }

.slider-arrow { position: absolute; top: 50%; transform: translateY(-50%); background: rgba(0,0,0,0.4); color: white; border: none; font-size: 1.5rem; padding: 0.8rem 1rem; cursor: pointer; border-radius: 50%; transition: background 0.3s; z-index: 10; }
.slider-arrow:hover { background: rgba(0,0,0,0.7); }
.slider-prev { left: 20px; }
.slider-next { right: 20px; }

.slider-dots { display: flex; justify-content: center; gap: 0.6rem; position: absolute; bottom: 20px; left: 50%; transform: translateX(-50%); z-index: 10; }
.slider-dot { width: 12px; height: 12px; border-radius: 50%; background: rgba(255,255,255,0.5); cursor: pointer; transition: background 0.3s; }
.slider-dot.active { background: #FF6600; }

/* 解决方案 */
.solutions-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 1.8rem; margin-top: 1rem; }

/* 关于我们 */
.about-layout { display: flex; gap: 3rem; align-items: center; background: #fff; border-radius: 24px; padding: 2.5rem; box-shadow: 0 10px 25px rgba(0,0,0,.03); }
.about-img { flex: 0 0 45%; height: 320px; background: #cbd5e1; border-radius: 16px; display: flex; align-items: center; justify-content: center; color: #475569; font-size: 1.2rem; }
.about-text h3 { font-size: 1.8rem; color: #003D7A; margin-bottom: 1rem; }

/* 产品筛选 */
.product-filter-bar { display: flex; justify-content: center; gap: 2rem; margin-bottom: 2.5rem; }
.filter-item { cursor: pointer; padding: 0.6rem 1.5rem; font-weight: 500; border-radius: 8px; transition: 0.2s; border: 1px solid transparent; }
.filter-item:hover { background: #f0f4ff; color: #003D7A; }
.filter-item.active { background: #003D7A; color: #fff; }
.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; }
.product-img { width: 100%; aspect-ratio: 1 / 1; display: flex; align-items: center; justify-content: center; font-size: 1.1rem; font-weight: 600; border-radius: 12px 12px 0 0; }
.product-name { padding: 0.8rem 1rem; text-align: center; font-size: 0.95rem; font-weight: 600; color: #003D7A; background: white; }

/* 信任模块 */
.trust-banner { background: linear-gradient(135deg, #003D7A, #0055a5); border-radius: 24px; padding: 3.5rem 2rem; display: flex; justify-content: space-around; color: #fff; }
.trust-number { font-size: 3rem; font-weight: 800; color: #FF6600; }

/* 核心优势 */
.advantages-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 1.8rem; }
.advantage-card { background: #fff; border-radius: 16px; padding: 2rem; text-align: center; box-shadow: 0 8px 20px rgba(0,0,0,.04); transition: 0.3s; }
.advantage-card:hover { transform: translateY(-6px); }
.advantage-icon { width: 60px; height: 60px; background: linear-gradient(135deg,#003D7A,#0055a5); border-radius: 50%; margin: 0 auto 1.2rem; display: flex; align-items: center; justify-content: center; color: #fff; font-size: 1.8rem; }

/* 众多行业应用场景 */
.scenarios-carousel { position: relative; overflow: hidden; }
.scenarios-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.8rem; transition: transform 0.5s ease; }
.scenario-item { position: relative; border-radius: 18px; overflow: hidden; height: 210px; }
.scenario-item:hover { transform: translateY(-6px); }
.scenario-img { width: 100%; height: 100%; transition: 0.4s; }
.scenario-item:hover .scenario-img { transform: scale(1.08); }
.scenario-label { position: absolute; bottom: 0; left: 0; right: 0; background: linear-gradient(transparent, rgba(0,0,0,.8)); color: #fff; padding: 1.5rem 1rem; font-weight: 600; }

.carousel-arrow { position: absolute; top: 50%; transform: translateY(-50%); background: rgba(0,0,0,0.5); color: white; border: none; font-size: 1.3rem; padding: 0.6rem 0.8rem; cursor: pointer; border-radius: 50%; transition: background 0.3s; z-index: 10; }
.carousel-arrow:hover { background: rgba(0,0,0,0.8); }
.carousel-prev { left: -10px; }
.carousel-next { right: -10px; }

/* 资讯中心 */
.news-tabs { display: flex; gap: 0.5rem; margin-bottom: 1rem; border-bottom: 2px solid #eef3fa; padding-bottom: 0.5rem; }
.news-tab { padding: 0.5rem 1rem; cursor: pointer; font-weight: 500; color: #6b7280; }
.news-tab.active { color: #003D7A; background: #f0f4ff; border-bottom: 3px solid #FF6600; }
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2.5rem; }
.news-col { background: #fff; border-radius: 16px; padding: 2rem; box-shadow: 0 6px 18px rgba(0,0,0,.03); }
.news-list li { padding: 0.7rem 0; border-bottom: 1px dashed #e5e7eb; display: flex; justify-content: space-between; }

/* 合作客户 */
.partners-grid { display: grid; grid-template-columns: repeat(8, 1fr); gap: 1rem; }
.partner-logo { background: #fff; border-radius: 12px; padding: 0.8rem; display: flex; align-items: center; justify-content: center; height: 70px; box-shadow: 0 4px 12px rgba(0,0,0,.03); }

/* 响应式 */
@media (max-width: 992px) {
  .solutions-grid { grid-template-columns: repeat(2, 1fr); }
  .advantages-grid { grid-template-columns: repeat(2, 1fr); }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .news-grid { grid-template-columns: 1fr; }
  .partners-grid { grid-template-columns: repeat(4, 1fr); }
  .about-layout { flex-direction: column; }
  .slide-content h2 { font-size: 2rem; }
  .scenarios-grid { grid-template-columns: repeat(2, 1fr); }
}