/* 基础重置 */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: #1b2430;
  line-height: 1.6;
  background: linear-gradient(180deg, #f4f7fb 0%, #eef3f9 100%);
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ===== 导航栏 ===== */
.header,
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #999999;
  border-bottom: 1px solid rgba(102, 102, 102, 0.6);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo img {
  height: 46px;
  width: auto;
  filter: drop-shadow(0 6px 12px rgba(15, 35, 70, 0.10));
}

.nav,
.site-nav { display: flex; gap: 8px; }

.nav-link {
  display: inline-block;
  padding: 8px 24px;
  font-size: 16px;
  font-weight: 600;
  color: #ffffff;
  border: 1px solid transparent;
  border-radius: 999px;
  transition: all 0.2s ease;
}

.nav-link:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.18);
  border-color: rgba(255, 255, 255, 0.35);
}

.nav-link.active {
  color: #fff;
  background: rgba(85, 85, 85, 0.95);
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.35);
}

/* ===== Banner 轮播 ===== */
.banner {
  position: relative;
  width: 100%;
  height: 520px;
  overflow: hidden;
  background: #ffffff;
}

.banner::before {
  display: none;
}

.banner-slider { display: flex; gap: 20px; height: 100%; transition: transform 0.5s ease; }
.banner-slide {
  min-width: calc((100% - 40px) / 3);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #ffffff;
}
.banner-slide img {
  width: auto;
  height: calc(100% - 36px);
  object-fit: contain;
  padding: 0;
  position: relative;
  z-index: 1;
  background: #ffffff;
}

.banner-title {
  text-align: center;
  font-size: 32px;
  font-weight: 700;
  padding: 24px 0;
}

.banner-btn,
.banner-control {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  width: 46px;
  height: 46px;
  border: 1px solid rgba(255,255,255,0.30);
  border-radius: 50%;
  background: rgba(15, 23, 36, 0.56);
  color: #fff;
  font-size: 24px;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(8px);
}

.banner-btn:hover,
.banner-control:hover {
  background: rgba(0, 90, 255, 0.86);
  border-color: rgba(255,255,255,0.5);
  box-shadow: 0 0 20px rgba(0, 163, 255, 0.36);
}
.banner-btn-prev,
.banner-prev { left: 20px; }
.banner-btn-next,
.banner-next { right: 20px; }

.banner-dots {
  position: absolute;
  bottom: 22px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 9px 14px;
  border-radius: 999px;
  background: rgba(8, 16, 28, 0.72);
  border: 1px solid rgba(0, 163, 255, 0.35);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.34), 0 0 18px rgba(0, 163, 255, 0.18);
  backdrop-filter: blur(10px);
}

.banner-dot {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: #ffffff;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 2px solid rgba(0, 163, 255, 0.78);
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.26);
}

.banner-dot:hover {
  transform: scale(1.18);
  background: #dff6ff;
  border-color: #00A3FF;
  box-shadow: 0 0 0 3px rgba(0, 163, 255, 0.22), 0 0 12px rgba(0, 163, 255, 0.55);
}

.banner-dot.active {
  width: 34px;
  background: linear-gradient(135deg, #00A3FF 0%, #005AFF 100%);
  border-color: #ffffff;
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.35), 0 0 18px rgba(0, 163, 255, 0.95);
}

/* ===== 主内容区 ===== */
.main-content {
  padding: 64px 20px;
}

.content-left,
.content-right {
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(0, 90, 255, 0.10);
  border-radius: 18px;
  padding: 28px;
  box-shadow: 0 18px 40px rgba(17, 38, 73, 0.08);
}

.content-left {
  margin-bottom: 48px;
}

.section-title,
.content-left h2,
.content-right h2 {
  font-size: 24px;
  font-weight: 700;
  color: #111827;
  margin-bottom: 28px;
  padding-bottom: 12px;
  border-bottom: 3px solid #00A3FF;
  display: inline-block;
  letter-spacing: 0.04em;
}

/* 装车方案图片 */
.solution-images,
.solution-gallery { display: flex; flex-direction: column; gap: 20px; }

.solution-row {
  display: flex;
  gap: 20px;
}

.solution-card,
.solution-gallery img {
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid rgba(0, 90, 255, 0.14);
  background: #f8fbff;
  box-shadow: 0 10px 24px rgba(17, 38, 73, 0.10);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.solution-card:hover,
.solution-gallery img:hover {
  transform: translateY(-2px);
  border-color: rgba(0, 163, 255, 0.48);
  box-shadow: 0 16px 32px rgba(0, 90, 255, 0.18);
}
.solution-card img,
.solution-gallery img { width: 100%; height: auto; object-fit: cover; }
.solution-img-full { aspect-ratio: 16 / 7; }
.solution-img-half { width: calc(50% - 10px); aspect-ratio: 4 / 3; }

/* 产品特性列表 */
.product-features { list-style: none; }

.product-features li {
  position: relative;
  padding: 11px 0 11px 24px;
  font-size: 15px;
  color: #334155;
  border-bottom: 1px solid rgba(0, 90, 255, 0.08);
}

.product-features li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #00A3FF;
  box-shadow: 0 0 10px rgba(0, 163, 255, 0.7);
}

/* ===== 页脚 ===== */
.footer,
.site-footer {
  background:
    radial-gradient(circle at 50% 0%, rgba(0, 163, 255, 0.18), transparent 34%),
    linear-gradient(135deg, #101827 0%, #172033 100%);
  color: #cbd5e1;
  padding: 34px 0;
  text-align: center;
  border-top: 1px solid rgba(0, 163, 255, 0.18);
}

.footer-inner {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px 24px;
}

.footer-inner p { margin: 0; }

.footer-company,
.site-footer .footer-inner p:first-child { font-size: 16px; font-weight: 700; color: #fff; }
.footer-copy { font-size: 13px; }

.footer-icp a,
.site-footer .footer-inner p:nth-child(3) a { font-size: 13px; color: #cbd5e1; transition: color 0.2s; }
.footer-icp a:hover,
.site-footer .footer-inner p:nth-child(3) a:hover { color: #00A3FF; }

.footer-contact,
.site-footer .footer-inner p:nth-child(4) { font-size: 14px; }
.footer-contact a,
.site-footer .footer-inner p:nth-child(4) a { color: #cbd5e1; transition: color 0.2s; }
.footer-contact a:hover,
.site-footer .footer-inner p:nth-child(4) a:hover { color: #00A3FF; }

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .container { padding: 0 14px; }
  .header-inner { height: 56px; gap: 10px; }
  .logo img { height: 32px; }
  .nav,
  .site-nav { gap: 4px; }
  .nav-link { padding: 6px 10px; font-size: 14px; white-space: nowrap; }
  .banner { height: 280px; }
  .banner-slide img { padding: 10px 0; }
  .banner-btn,
  .banner-control { width: 32px; height: 32px; font-size: 18px; }
  .banner-btn-prev,
  .banner-prev { left: 10px; }
  .banner-btn-next,
  .banner-next { right: 10px; }
  .main-content { flex-direction: column; gap: 36px; padding: 40px 14px; }
  .content-left,
  .content-right { padding: 22px; }
  .section-title,
  .content-left h2,
  .content-right h2 { font-size: 20px; }
  .solution-images,
  .solution-gallery { flex-direction: row; flex-wrap: wrap; }
  .solution-card,
  .solution-gallery img { flex: 1 1 calc(50% - 10px); min-width: 140px; }
  .product-features li { font-size: 14px; }
  .footer,
  .site-footer { padding: 28px 0; }
  .footer-inner { gap: 10px 16px; }
  .footer-company,
  .site-footer .footer-inner p:first-child { font-size: 15px; }
}

@media (max-width: 480px) {
  .header-inner { height: auto; min-height: 56px; }
  .logo img { height: 28px; }
  .nav-link { padding: 5px 8px; font-size: 13px; }
  .solution-card,
  .solution-gallery img { flex: 1 1 100%; }
  .banner { height: 220px; }
  .content-left,
  .content-right { padding: 18px; border-radius: 14px; }
}

@media (max-width: 360px) {
  .container { padding: 0 10px; }
  .nav,
  .site-nav { gap: 2px; }
  .nav-link { padding: 5px 6px; font-size: 12px; }
  .main-content { padding: 40px 10px; }
}