/* ============================================================
   dycb123 - 挡烟垂壁科技 专属样式
   消防工业风格：深蓝权威 + 橙色行动引导
   ============================================================ */

/* 主题变量覆盖 */
:root {
  --dycb-primary: #0c4a6e;
  --dycb-primary-dark: #082f49;
  --dycb-primary-light: #e0f2fe;
  --dycb-accent: #ea580c;
  --dycb-accent-dark: #c2410c;
  --dycb-text: #0f172a;
  --dycb-text-light: #64748b;
  --dycb-bg: #f8fafc;
  --dycb-bg-alt: #f1f5f9;
  --dycb-border: #e2e8f0;
  --dycb-card: #ffffff;
  --dycb-shadow: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --dycb-shadow-lg: 0 8px 24px rgba(0,0,0,.1);
  --dycb-radius: 6px;
}

/* ============================================================
   顶部导航
   ============================================================ */
.b2b-shop-header {
  background: linear-gradient(135deg, var(--dycb-primary-dark), var(--dycb-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, #082f49 0%, #0c4a6e 40%, #0369a1 100%);
  padding: 56px 0 48px;
  position: relative;
  overflow: hidden;
}
.b2b-shop-banner::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
}
.b2b-shop-banner h1 {
  font-size: 34px;
  font-weight: 800;
  margin-bottom: 14px;
  position: relative;
}
.b2b-shop-banner p {
  font-size: 16px;
  opacity: 0.92;
  position: relative;
}
.b2b-banner-service-area {
  display: inline-block;
  margin-top: 12px;
  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);
  position: relative;
}
.b2b-banner-cta {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  margin-top: 20px;
  padding: 14px 36px;
  background: var(--dycb-accent);
  color: #fff;
  border-radius: var(--dycb-radius);
  font-weight: 700;
  box-shadow: 0 4px 14px rgba(234,88,12,.35);
  transition: all .25s;
  position: relative;
}
.b2b-banner-cta:hover {
  background: var(--dycb-accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(234,88,12,.4);
  text-decoration: none;
  color: #fff;
}
.b2b-banner-cta .cta-phone {
  font-size: 22px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: 1px;
}
.b2b-banner-cta .cta-text {
  font-size: 13px;
  font-weight: 500;
  opacity: 0.9;
  margin-top: 2px;
}

/* ============================================================
   板块通用
   ============================================================ */
.b2b-shop-section {
  padding: 52px 0;
}
.b2b-shop-section:nth-child(even) {
  background: var(--dycb-card);
}
.b2b-shop-section:nth-child(odd) {
  background: var(--dycb-bg);
}
.b2b-shop-section-title {
  text-align: center;
  font-size: 26px;
  font-weight: 700;
  color: var(--dycb-text);
  margin-bottom: 8px;
}
.b2b-shop-section-en {
  display: block;
  font-size: 13px;
  color: #94a3b8;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-top: 6px;
  font-weight: 400;
}
.b2b-shop-section-desc {
  text-align: center;
  color: var(--dycb-text-light);
  font-size: 15px;
  margin-bottom: 36px;
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

/* ============================================================
   关于我们
   ============================================================ */
.b2b-about-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}
.b2b-about-text {
  font-size: 15px;
  color: #334155;
  line-height: 2;
}
.b2b-about-extra {
  margin-top: 16px;
  padding: 16px 20px;
  background: var(--dycb-primary-light);
  border-left: 3px solid var(--dycb-primary);
  border-radius: 0 var(--dycb-radius) var(--dycb-radius) 0;
  font-size: 14px;
  color: var(--dycb-primary-dark);
  line-height: 1.8;
}
.b2b-about-stats {
  display: flex;
  gap: 32px;
  margin-top: 28px;
}
.b2b-about-stat-num {
  font-size: 30px;
  font-weight: 800;
  color: var(--dycb-primary);
  line-height: 1.2;
}
.b2b-about-stat-label {
  font-size: 13px;
  color: var(--dycb-text-light);
  margin-top: 4px;
}
.b2b-about-image img {
  width: 100%;
  border-radius: var(--dycb-radius);
  box-shadow: var(--dycb-shadow-lg);
}
.b2b-about-contact {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px dashed var(--dycb-border);
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  font-size: 14px;
  color: var(--dycb-text-light);
}
.b2b-about-contact span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.b2b-about-contact a {
  color: var(--dycb-primary);
  font-weight: 600;
}

/* ============================================================
   产品中心
   ============================================================ */
.b2b-product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}
.b2b-product-card {
  background: var(--dycb-card);
  border-radius: var(--dycb-radius);
  overflow: hidden;
  border: 1px solid var(--dycb-border);
  box-shadow: var(--dycb-shadow);
  transition: transform .2s, box-shadow .2s;
}
.b2b-product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--dycb-shadow-lg);
}
.b2b-product-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background: var(--dycb-bg-alt);
}
.b2b-product-card-body {
  padding: 14px 16px;
}
.b2b-product-card-title {
  font-size: 14px;
  color: var(--dycb-text);
  font-weight: 600;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ============================================================
   核心优势
   ============================================================ */
.b2b-advantage-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}
.b2b-advantage-card {
  text-align: center;
  padding: 32px 20px 28px;
  background: var(--dycb-card);
  border-radius: var(--dycb-radius);
  border: 1px solid var(--dycb-border);
  box-shadow: var(--dycb-shadow);
  transition: box-shadow .2s, transform .2s;
  position: relative;
}
.b2b-advantage-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 3px;
  background: var(--dycb-primary);
  border-radius: 0 0 3px 3px;
}
.b2b-advantage-card:hover {
  box-shadow: var(--dycb-shadow-lg);
  transform: translateY(-2px);
}
.b2b-advantage-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  background: var(--dycb-primary-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.b2b-advantage-icon svg {
  width: 28px;
  height: 28px;
  stroke: var(--dycb-primary);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.b2b-advantage-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--dycb-text);
}
.b2b-advantage-desc {
  font-size: 13px;
  color: var(--dycb-text-light);
  line-height: 1.7;
}

/* ============================================================
   客户案例
   ============================================================ */
.b2b-case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
}
.b2b-case-card {
  padding: 16px 20px;
  background: var(--dycb-card);
  border: 1px solid var(--dycb-border);
  border-radius: var(--dycb-radius);
  font-size: 14px;
  font-weight: 600;
  color: var(--dycb-text);
  text-align: center;
  box-shadow: var(--dycb-shadow);
  transition: border-color .2s, box-shadow .2s;
}
.b2b-case-card:hover {
  border-color: var(--dycb-primary);
  box-shadow: 0 2px 8px rgba(12,74,110,.1);
}
.b2b-case-note {
  margin-top: 20px;
  text-align: center;
  font-size: 14px;
  color: var(--dycb-text-light);
  line-height: 1.8;
}

/* ============================================================
   服务流程
   ============================================================ */
.b2b-process-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 20px;
}
.b2b-process-card {
  text-align: center;
  padding: 28px 16px 24px;
  background: var(--dycb-card);
  border: 1px solid var(--dycb-border);
  border-radius: var(--dycb-radius);
  box-shadow: var(--dycb-shadow);
  position: relative;
}
.b2b-process-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 30px;
  height: 3px;
  background: var(--dycb-accent);
  border-radius: 3px 3px 0 0;
}
.b2b-process-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 14px;
  background: var(--dycb-primary-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.b2b-process-icon svg {
  width: 24px;
  height: 24px;
  stroke: var(--dycb-primary);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.b2b-process-title {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--dycb-text);
}
.b2b-process-desc {
  font-size: 13px;
  color: var(--dycb-text-light);
  line-height: 1.6;
}

/* ============================================================
   联系我们
   ============================================================ */
.b2b-contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.b2b-contact-card {
  text-align: center;
  padding: 28px 20px;
  background: var(--dycb-card);
  border: 1px solid var(--dycb-border);
  border-radius: var(--dycb-radius);
  box-shadow: var(--dycb-shadow);
  transition: box-shadow .2s;
}
.b2b-contact-card:hover {
  box-shadow: var(--dycb-shadow-lg);
}
.b2b-contact-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 12px;
  background: var(--dycb-primary-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.b2b-contact-icon svg {
  width: 24px;
  height: 24px;
  stroke: var(--dycb-primary);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.b2b-contact-label {
  font-size: 13px;
  color: var(--dycb-text-light);
  margin-bottom: 6px;
}
.b2b-contact-value {
  font-size: 16px;
  font-weight: 700;
  color: var(--dycb-text);
  word-break: break-all;
}
.b2b-contact-value a {
  color: var(--dycb-primary);
}

/* ============================================================
   推荐链接 / 合作伙伴
   ============================================================ */
.b2b-recommend-wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
}
.b2b-recommend-group {
  margin-bottom: 20px;
}
.b2b-recommend-group-title {
  font-size: 14px;
  font-weight: 700;
  color: #475569;
  margin-bottom: 10px;
  padding-left: 10px;
  border-left: 3px solid var(--dycb-primary);
}
.b2b-recommend-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
}
.b2b-recommend-links a {
  color: #475569;
  font-size: 13px;
  padding: 4px 12px;
  background: var(--dycb-bg-alt);
  border-radius: 4px;
  border: 1px solid transparent;
  transition: all .2s;
}
.b2b-recommend-links a:hover {
  background: var(--dycb-primary-light);
  color: var(--dycb-primary);
  border-color: var(--dycb-border);
  text-decoration: none;
}

/* ============================================================
   底部
   ============================================================ */
.b2b-shop-footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 28px 0 20px;
  text-align: center;
  font-size: 13px;
}
.b2b-shop-footer p {
  margin: 4px 0;
  line-height: 1.8;
}
.b2b-shop-footer a {
  color: #7dd3fc;
}
.b2b-shop-footer a:hover {
  color: #38bdf8;
}

/* ============================================================
   手机端悬浮拨号按钮
   ============================================================ */
.b2b-mobile-call-btn {
  background: var(--dycb-accent) !important;
  box-shadow: 0 2px 8px rgba(234,88,12,.3) !important;
}
.b2b-mobile-call-btn:hover {
  background: var(--dycb-accent-dark) !important;
  box-shadow: 0 4px 12px rgba(234,88,12,.4) !important;
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 768px) {
  .b2b-shop-nav {
    display: none;
  }
  .b2b-shop-banner {
    padding: 32px 0 28px;
  }
  .b2b-shop-banner h1 {
    font-size: 22px;
  }
  .b2b-shop-banner p {
    font-size: 14px;
  }
  .b2b-banner-cta {
    padding: 12px 28px;
  }
  .b2b-banner-cta .cta-phone {
    font-size: 18px;
  }
  .b2b-shop-section {
    padding: 36px 0;
  }
  .b2b-shop-section-title {
    font-size: 20px;
  }
  .b2b-about-wrap {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .b2b-about-stats {
    gap: 20px;
  }
  .b2b-about-stat-num {
    font-size: 24px;
  }
  .b2b-product-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
  .b2b-advantage-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
  .b2b-case-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }
  .b2b-process-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
  .b2b-contact-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }
}
@media (max-width: 480px) {
  .b2b-shop-banner h1 {
    font-size: 20px;
  }
  .b2b-product-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }
  .b2b-product-card img {
    height: 140px;
  }
  .b2b-advantage-grid {
    grid-template-columns: 1fr;
  }
  .b2b-case-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .b2b-process-grid {
    grid-template-columns: 1fr;
  }
  .b2b-about-stats {
    flex-wrap: wrap;
    gap: 16px;
  }
}