/* ============================================================
   dkdongxing - 东兴水泥制品厂 专属样式
   水泥预制构件工业风格：稳重蓝灰 + 橙色行动引导
   ============================================================ */

/* 主题变量覆盖 */
:root {
  --dkdx-primary: #1e3a5f;
  --dkdx-primary-dark: #0f2440;
  --dkdx-primary-light: #e0ecf8;
  --dkdx-accent: #d97706;
  --dkdx-accent-dark: #b45309;
  --dkdx-text: #1e293b;
  --dkdx-text-light: #64748b;
  --dkdx-bg: #f8fafc;
  --dkdx-bg-alt: #f1f5f9;
  --dkdx-border: #e2e8f0;
  --dkdx-card: #ffffff;
  --dkdx-shadow: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --dkdx-shadow-lg: 0 8px 24px rgba(0,0,0,.1);
  --dkdx-radius: 6px;
}

/* ============================================================
   顶部导航
   ============================================================ */
.b2b-shop-header {
  background: linear-gradient(135deg, var(--dkdx-primary-dark), var(--dkdx-primary));
  box-shadow: 0 2px 12px rgba(0,0,0,.18);
}
.b2b-shop-header-inner {
  height: 64px;
}
.b2b-shop-logo {
  font-size: 20px;
  letter-spacing: 1px;
}
.b2b-shop-nav a {
  font-size: 13px;
  padding: 6px 10px;
  letter-spacing: 0.5px;
}
.b2b-shop-tel {
  font-size: 16px;
}
.b2b-shop-tel a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  background: rgba(255,255,255,.12);
  border-radius: 4px;
  border: 1px solid rgba(255,255,255,.2);
  transition: background .2s;
}
.b2b-shop-tel a:hover {
  background: rgba(255,255,255,.22);
  text-decoration: none;
}

/* ============================================================
   Banner
   ============================================================ */
.b2b-shop-banner {
  background:
    linear-gradient(135deg, rgba(15,36,64,.92), rgba(30,58,95,.88)),
    url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="60" height="60"><rect width="60" height="60" fill="none"/><path d="M0 30h60M30 0v60" stroke="rgba(255,255,255,.04)" stroke-width="1"/></svg>');
  padding: 56px 0 48px;
}
.b2b-shop-banner h1 {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: 2px;
  text-shadow: 0 2px 8px rgba(0,0,0,.25);
}
.b2b-banner-service-area {
  display: inline-block;
  margin: 12px 0 20px;
  padding: 6px 20px;
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 20px;
  font-size: 14px;
  color: rgba(255,255,255,.9);
  letter-spacing: 0.5px;
}
.b2b-banner-cta {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 14px 36px;
  background: var(--dkdx-accent);
  color: #fff;
  border-radius: var(--dkdx-radius);
  font-weight: 700;
  font-size: 15px;
  box-shadow: 0 4px 16px rgba(217,119,6,.35);
  transition: background .2s, transform .2s;
}
.b2b-banner-cta:hover {
  background: var(--dkdx-accent-dark);
  transform: translateY(-2px);
  text-decoration: none;
  color: #fff;
}
.b2b-banner-cta .cta-phone {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 1px;
}
.b2b-banner-cta .cta-text {
  font-size: 13px;
  opacity: .9;
}

/* ============================================================
   通用板块
   ============================================================ */
.b2b-shop-section {
  padding: 48px 0;
}
.b2b-shop-section:nth-child(even) {
  background: var(--dkdx-bg-alt);
}
.b2b-shop-section-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--dkdx-text);
  padding-left: 14px;
  border-left: 4px solid var(--dkdx-primary);
  margin-bottom: 8px;
  line-height: 1.4;
}
.b2b-shop-section-en {
  display: block;
  font-size: 13px;
  font-weight: 400;
  color: var(--dkdx-text-light);
  margin-top: 4px;
  letter-spacing: 0.5px;
}
.b2b-shop-section-desc {
  font-size: 15px;
  color: var(--dkdx-text-light);
  line-height: 1.8;
  margin-bottom: 28px;
  padding-left: 14px;
}

/* ============================================================
   关于我们
   ============================================================ */
.b2b-about-wrap {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 36px;
  align-items: start;
}
.b2b-about-text {
  font-size: 15px;
  line-height: 1.9;
  color: var(--dkdx-text);
  margin-bottom: 16px;
}
.b2b-about-extra {
  font-size: 14px;
  line-height: 1.8;
  color: var(--dkdx-text-light);
  padding: 14px 18px;
  background: var(--dkdx-bg-alt);
  border-left: 3px solid var(--dkdx-primary);
  border-radius: 0 var(--dkdx-radius) var(--dkdx-radius) 0;
}
.b2b-about-stats {
  display: flex;
  gap: 32px;
  margin-top: 24px;
  padding: 20px 0;
  border-top: 1px solid var(--dkdx-border);
  border-bottom: 1px solid var(--dkdx-border);
}
.b2b-about-stat-num {
  font-size: 28px;
  font-weight: 800;
  color: var(--dkdx-primary);
  line-height: 1.2;
}
.b2b-about-stat-label {
  font-size: 13px;
  color: var(--dkdx-text-light);
  margin-top: 4px;
}
.b2b-about-contact {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  margin-top: 16px;
  font-size: 14px;
  color: var(--dkdx-text);
}
.b2b-about-contact a {
  color: var(--dkdx-primary);
  font-weight: 600;
}
.b2b-about-image {
  border-radius: var(--dkdx-radius);
  overflow: hidden;
  box-shadow: var(--dkdx-shadow-lg);
}
.b2b-about-image img {
  width: 100%;
  height: auto;
  display: block;
}

/* ============================================================
   产品网格
   ============================================================ */
.b2b-product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}
.b2b-product-card {
  background: var(--dkdx-card);
  border: 1px solid var(--dkdx-border);
  border-radius: var(--dkdx-radius);
  overflow: hidden;
  box-shadow: var(--dkdx-shadow);
  transition: box-shadow .2s, transform .2s;
}
.b2b-product-card:hover {
  box-shadow: var(--dkdx-shadow-lg);
  transform: translateY(-3px);
}
.b2b-product-card img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  background: var(--dkdx-bg-alt);
}
.b2b-product-card-body {
  padding: 12px 14px;
}
.b2b-product-card-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--dkdx-text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ============================================================
   核心优势
   ============================================================ */
.b2b-advantage-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.b2b-advantage-card {
  background: var(--dkdx-card);
  border: 1px solid var(--dkdx-border);
  border-radius: var(--dkdx-radius);
  padding: 28px 24px;
  box-shadow: var(--dkdx-shadow);
  transition: box-shadow .2s, transform .2s;
  text-align: center;
}
.b2b-advantage-card:hover {
  box-shadow: var(--dkdx-shadow-lg);
  transform: translateY(-2px);
}
.b2b-advantage-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  background: var(--dkdx-primary-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.b2b-advantage-icon svg {
  width: 28px;
  height: 28px;
  fill: none;
  stroke: var(--dkdx-primary);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.b2b-advantage-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--dkdx-text);
  margin-bottom: 10px;
}
.b2b-advantage-desc {
  font-size: 14px;
  color: var(--dkdx-text-light);
  line-height: 1.7;
}

/* ============================================================
   服务流程
   ============================================================ */
.b2b-process-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
}
.b2b-process-card {
  background: var(--dkdx-card);
  border: 1px solid var(--dkdx-border);
  border-radius: var(--dkdx-radius);
  padding: 24px 20px;
  text-align: center;
  box-shadow: var(--dkdx-shadow);
  position: relative;
  transition: box-shadow .2s, transform .2s;
}
.b2b-process-card:hover {
  box-shadow: var(--dkdx-shadow-lg);
  transform: translateY(-2px);
}
.b2b-process-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 14px;
  background: var(--dkdx-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.b2b-process-icon svg {
  width: 24px;
  height: 24px;
  fill: none;
  stroke: #fff;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.b2b-process-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--dkdx-text);
  margin-bottom: 8px;
}
.b2b-process-desc {
  font-size: 13px;
  color: var(--dkdx-text-light);
  line-height: 1.7;
}

/* ============================================================
   联系我们
   ============================================================ */
.b2b-contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.b2b-contact-card {
  background: var(--dkdx-card);
  border: 1px solid var(--dkdx-border);
  border-radius: var(--dkdx-radius);
  padding: 28px 24px;
  text-align: center;
  box-shadow: var(--dkdx-shadow);
  transition: box-shadow .2s;
}
.b2b-contact-card:hover {
  box-shadow: var(--dkdx-shadow-lg);
}
.b2b-contact-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 14px;
  background: var(--dkdx-primary-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.b2b-contact-icon svg {
  width: 24px;
  height: 24px;
  fill: none;
  stroke: var(--dkdx-primary);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.b2b-contact-label {
  font-size: 13px;
  color: var(--dkdx-text-light);
  margin-bottom: 8px;
}
.b2b-contact-value {
  font-size: 18px;
  font-weight: 700;
  color: var(--dkdx-text);
}
.b2b-contact-value a {
  color: var(--dkdx-primary);
}
.b2b-contact-value a:hover {
  color: var(--dkdx-accent);
}

/* ============================================================
   合作伙伴与产业生态圈
   ============================================================ */
.b2b-recommend-wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 15px;
}
.b2b-recommend-group {
  margin-bottom: 24px;
}
.b2b-recommend-group-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--dkdx-text);
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--dkdx-border);
}
.b2b-recommend-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.b2b-recommend-links a {
  font-size: 13px;
  color: var(--dkdx-text-light);
  padding: 4px 12px;
  background: var(--dkdx-bg-alt);
  border-radius: 4px;
  border: 1px solid var(--dkdx-border);
  transition: all .2s;
}
.b2b-recommend-links a:hover {
  color: var(--dkdx-primary);
  background: var(--dkdx-primary-light);
  border-color: var(--dkdx-primary);
  text-decoration: none;
}

/* ============================================================
   底部
   ============================================================ */
.b2b-shop-footer {
  background: var(--dkdx-primary-dark);
  color: rgba(255,255,255,.7);
  padding: 32px 0 20px;
  text-align: center;
}
.b2b-shop-footer p {
  font-size: 13px;
  line-height: 1.8;
  margin-bottom: 4px;
}
.b2b-shop-footer a {
  color: #93c5fd;
}
.b2b-shop-footer a:hover {
  color: #bfdbfe;
}

/* ============================================================
   移动端悬浮按钮
   ============================================================ */
.b2b-mobile-call-float {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 200;
  background: var(--dkdx-accent);
  padding: 0;
  display: none;
}
.b2b-mobile-call-btn {
  display: block;
  text-align: center;
  padding: 14px 0;
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 1px;
}
.b2b-mobile-call-btn:hover {
  background: var(--dkdx-accent-dark);
  text-decoration: none;
  color: #fff;
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 900px) {
  .b2b-about-wrap {
    grid-template-columns: 1fr;
  }
  .b2b-about-image {
    order: -1;
  }
}
@media (max-width: 768px) {
  .b2b-shop-header-inner {
    height: auto;
    flex-direction: column;
    padding: 12px 15px;
    gap: 8px;
  }
  .b2b-shop-banner {
    padding: 32px 0 28px;
  }
  .b2b-shop-banner h1 {
    font-size: 22px;
  }
  .b2b-banner-cta {
    padding: 12px 28px;
  }
  .b2b-banner-cta .cta-phone {
    font-size: 18px;
  }
  .b2b-product-grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 10px;
  }
  .b2b-advantage-grid {
    grid-template-columns: 1fr;
  }
  .b2b-process-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .b2b-contact-grid {
    grid-template-columns: 1fr;
  }
  .b2b-mobile-call-float {
    display: block;
  }
  .b2b-about-stats {
    gap: 16px;
  }
  .b2b-about-stat-num {
    font-size: 22px;
  }
}
@media (max-width: 480px) {
  .b2b-shop-section-title {
    font-size: 20px;
  }
  .b2b-process-grid {
    grid-template-columns: 1fr;
  }
  .b2b-product-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}