/* =============================================
   山东银宏 - 移动端响应式样式
   ============================================= */

@media screen and (max-width: 768px) {

  /* 基础 */
  html { font-size: 15px; }
  .container { padding: 0 16px; }

  /* 顶部栏 */
  .top-bar { font-size: 12px; padding: 6px 0; }
  .top-links { display: none; }

  /* 头部 */
  .header { padding: 12px 0; }
  .logo-img { height: 44px; }
  .logo-text { font-size: 15px; letter-spacing: 1px; }
  .phone-number { font-size: 20px; }
  .phone-sub { display: none; }
  .mobile-menu-btn { display: block; position: absolute; right: 16px; top: 50%; transform: translateY(-50%); }

  /* 导航 */
  .main-nav { position: relative; }
  .nav-list { display: none; flex-direction: column; }
  .nav-list.open { display: flex; }
  .nav-list > li > a { padding: 12px 20px; font-size: 14px; border-bottom: 1px solid rgba(255,255,255,.1); }
  .dropdown { position: static; box-shadow: none; border-top: none; border-radius: 0; }
  .dropdown li a { padding: 10px 36px; font-size: 13px; background: #f8fafc !important; }
  .nav-list > li.has-dropdown > a::after { float: right; margin-top: 4px; }

  /* Banner */
  .banner-item { min-height: 280px; }
  .banner-content { padding: 40px 16px; }
  .banner-content h2 { font-size: 24px; }
  .banner-content p { font-size: 15px; }

  /* Section */
  .section { padding: 40px 0; }
  .section-header h2 { font-size: 24px; }
  .section-header p { font-size: 14px; }

  /* 优势 */
  .adv-grid { grid-template-columns: 1fr; gap: 16px; }
  .adv-item { padding: 24px 16px; }

  /* 产品 */
  .product-grid { grid-template-columns: 1fr; gap: 20px; }

  /* 场景 */
  .scenario-grid { grid-template-columns: 1fr; gap: 16px; }

  /* 案例 */
  .case-grid { grid-template-columns: 1fr; gap: 20px; }

  /* FAQ */
  .faq-question { padding: 14px 16px; }
  .faq-question h3 { font-size: 15px; }
  .faq-answer { padding: 0 16px 14px; font-size: 13px; }

  /* 新闻 */
  .news-grid { grid-template-columns: 1fr; gap: 16px; }

  /* CTA */
  .cta-section { padding: 40px 0; }
  .cta-section h2 { font-size: 22px; }
  .cta-buttons { flex-direction: column; align-items: center; }
  .btn-lg { padding: 14px 32px; font-size: 15px; }

  /* 产品详情页 */
  .product-detail-page { padding: 16px 0 40px; }
  .sidebar { width: 100%; margin-bottom: 24px; }
  .main-content { width: 100%; }
  .product-detail h2 { font-size: 22px; }
  .product-gallery { height: 200px; }
  .type-grid { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: 1fr; gap: 14px; }

  /* 页脚 */
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-seo-links { display: none; }
}

@media screen and (max-width: 480px) {
  .banner-content h2 { font-size: 20px; }
  .banner-content p { font-size: 14px; }
  .product-info h3 { font-size: 16px; }
  .scenario-tags span { font-size: 12px; padding: 4px 12px; }
}