/* ==========================================================================
   响应式样式 (移动端优先,然后 min-width 扩展)
   断点: 移动端 <768px | 平板 768-1024px | 桌面 >1024px
   ========================================================================== */

/* ---- 平板及以下 (≤1024px) ---- */
@media (max-width: 1024px) {
  .hero { min-height: auto; padding: 5rem 0 4rem; }
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 2.5rem;
    text-align: center;
  }
  .hero-text { margin: 0 auto; }
  .hero-cta { justify-content: center; }
  .hero-trust { justify-content: center; }
  .hero-image { max-width: 400px; }
  .hero-badge-1 { right: 5%; }
  .hero-badge-2 { left: 5%; }

  .product-preview-grid,
  .lifestyle-grid,
  .product-detail-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .product-detail-grid { gap: 2rem; }

  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }

  .flow-grid { grid-template-columns: repeat(2, 1fr); }
  .flow-step:nth-child(2)::after,
  .flow-step:nth-child(4)::after { display: none; }

  .related-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ---- 移动端 (≤768px) ---- */
@media (max-width: 768px) {
  :root {
    --container-padding: 1rem;
    --space-3xl: 4rem;
    --space-2xl: 3rem;
  }

  /* 导航 -> 汉堡菜单 */
  .menu-toggle { display: flex; }
  .nav-list {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 1rem;
    gap: 0.25rem;
    box-shadow: var(--shadow-md);
    transform: translateY(-150%);
    transition: transform 0.3s ease;
    max-height: calc(100vh - 70px);
    overflow-y: auto;
  }
  .nav-list.open { transform: translateY(0); }
  .nav-link { padding: 0.85rem 1rem; }
  .nav-link.active::after { display: none; }
  .nav-cta { margin: 0.5rem 0 0; text-align: center; }

  .header-inner { padding: 0.85rem var(--container-padding); }
  .brand-tagline { display: none; }

  /* Hero */
  .hero { min-height: auto; padding: 3.5rem 0 3rem; }
  .hero-image { max-width: 320px; }
  .hero-badge { padding: 0.6rem 0.9rem; font-size: 0.8rem; }
  .hero-badge-icon { width: 28px; height: 28px; font-size: 0.9rem; }
  .hero-trust { gap: 1rem; flex-wrap: wrap; }
  .hero-trust-num { font-size: 1.4rem; }

  /* Sections */
  section { padding: var(--space-2xl) 0; }
  .section-header { margin-bottom: 2rem; }

  .feature-grid,
  .article-grid,
  .articles-grid,
  .cert-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .feature-card { padding: 1.5rem 1.25rem; }
  .feature-icon { width: 50px; height: 50px; font-size: 1.3rem; }

  .purchase-grid { grid-template-columns: 1fr; }
  .purchase-card { padding: 1.5rem 1.25rem; }

  .trust-row { grid-template-columns: 1fr; gap: 1rem; }
  .trust-item { justify-content: flex-start; }

  .channel-grid { grid-template-columns: 1fr; }
  .audience-grid { grid-template-columns: 1fr; }
  .eat-grid { grid-template-columns: 1fr 1fr; gap: 0.75rem; }

  .flow-grid { grid-template-columns: 1fr; }
  .flow-step::after { display: none; }

  .product-info h1 { font-size: 1.5rem; }
  .product-price { font-size: 1.6rem; }
  .product-gallery-thumbs { grid-template-columns: repeat(4, 1fr); gap: 0.5rem; }

  .related-grid { grid-template-columns: 1fr; }

  /* 文章页 */
  .article-body { font-size: 1rem; line-height: 1.85; }
  .article-body h2 { font-size: 1.4rem; }
  .article-body h3 { font-size: 1.2rem; }
  .article-pager { flex-direction: column; }
  .article-pager a { max-width: 100%; }

  /* Footer */
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom { flex-direction: column; text-align: center; }

  /* Buttons */
  .btn { padding: 0.75rem 1.25rem; font-size: 0.95rem; }
  .btn-lg { padding: 0.9rem 1.5rem; font-size: 1rem; }

  /* Page hero */
  .page-hero { padding: 3rem 0 2rem; }
}

/* ---- 小屏 (≤480px) ---- */
@media (max-width: 480px) {
  .hero h1 { font-size: 1.85rem; }
  .hero-sub { font-size: 1rem; }
  .hero-cta { flex-direction: column; align-items: stretch; }
  .hero-cta .btn { width: 100%; }

  .eat-grid { grid-template-columns: 1fr; }
  .product-spec-list { font-size: 0.9rem; }
}

/* ---- 大屏 (≥1280px) ---- */
@media (min-width: 1280px) {
  .hero { min-height: 95vh; }
  .hero-image { max-width: 580px; }
}

/* ---- 减少动效 (可访问性) ---- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .hero-badge { animation: none; }
}

/* ---- 打印 ---- */
@media print {
  .site-header, .site-footer, .article-cta, .hero-cta, .purchase-cta { display: none; }
  body { background: #fff; color: #000; }
}