/* ==========================================================================
   迪森泰设计建站 - 响应式样式
   适配电脑、平板、手机
   ========================================================================== */

/* ========== 大屏 < 1280px ========== */
@media (max-width: 1280px) {
  .container { padding: 0 24px; }
  .footer-grid { grid-template-columns: 1.2fr 1fr 1fr 1fr; gap: 36px; }
  .footer-col:last-child { grid-column: 1 / -1; }
}

/* ========== 平板 < 1024px ========== */
@media (max-width: 1024px) {
  .main-nav { display: none; }
  .nav-toggle { display: flex; }
  .nav-cta { display: none; }

  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-quilt { max-width: 600px; }

  .advantage-grid { grid-template-columns: 1fr; }
  .process-track { grid-template-columns: repeat(3, 1fr); gap: 32px 20px; }
  .process-track::before { display: none; }

  .case-grid { grid-template-columns: repeat(2, 1fr); }
  .news-quilt { grid-template-columns: repeat(2, 1fr); }
  .stat-band { grid-template-columns: repeat(2, 1fr); gap: 32px; }

  .field-grid { grid-template-columns: repeat(2, 1fr); }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .honor-grid { grid-template-columns: repeat(2, 1fr); }
  .partner-grid { grid-template-columns: repeat(4, 1fr); }
  .price-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
  .price-card.featured { transform: none; }
  .price-card.featured:hover { transform: translateY(-6px); }

  .feat-split { grid-template-columns: 1fr; gap: 32px; }
  .feat-split.reverse { direction: ltr; }
  .feat-img img { height: 300px; }

  .contact-grid { grid-template-columns: 1fr; }
  .news-list-layout { grid-template-columns: 1fr; }
  .news-sidebar { position: static; }
  .article-layout { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .docs-grid { grid-template-columns: 1fr; }
  .docs-sidebar { position: static; }
  .case-detail-hero { grid-template-columns: 1fr; }
  .portfolio-grid { grid-template-columns: repeat(2, 1fr); }
  .sitemap-grid { grid-template-columns: repeat(2, 1fr); }
  .service-detail-grid { grid-template-columns: 1fr; }

  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
  .footer-col:first-child { grid-column: 1 / -1; }

  .cta-banner { padding: 40px 32px; }
  .content-wrap { padding: 36px 28px; }
}

/* ========== 手机 < 768px ========== */
@media (max-width: 768px) {
  body { font-size: 15px; }
  .section { padding: 64px 0; }
  .section-tight { padding: 48px 0; }
  .breath-section { padding: 64px 0; }

  .hero-home { padding: 120px 0 56px; }
  .hero-title { font-size: 1.8rem; }
  .hero-desc { font-size: 1rem; }
  .hero-stats { gap: 24px; flex-wrap: wrap; }
  .hero-stat .num { font-size: 1.6rem; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }

  .process-track { grid-template-columns: 1fr 1fr; gap: 28px 16px; }
  .step-num { width: 56px; height: 56px; font-size: 1.1rem; }

  .case-grid { grid-template-columns: 1fr; }
  .news-quilt { grid-template-columns: 1fr; }
  .stat-band { grid-template-columns: 1fr 1fr; padding: 32px 24px; gap: 24px; }
  .stat-num { font-size: 1.8rem; }

  .field-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .honor-grid { grid-template-columns: 1fr; }
  .partner-grid { grid-template-columns: repeat(3, 1fr); }
  .related-grid { grid-template-columns: 1fr; }
  .portfolio-grid { grid-template-columns: 1fr; }
  .sitemap-grid { grid-template-columns: 1fr; }

  .news-list-main .news-card { grid-template-columns: 1fr; }
  .news-list-main .news-img { height: 180px; }
  .news-list-main .news-body { padding: 20px; }

  .article-main { padding: 28px 20px; }
  .article-title { font-size: 1.4rem; }
  .article-meta { flex-wrap: wrap; gap: 12px; }

  .timeline::before { left: 20px; }
  .tl-item { grid-template-columns: 40px 1fr; }
  .tl-item .tl-empty { display: none; }
  .tl-item:nth-child(odd) .tl-content,
  .tl-item:nth-child(even) .tl-content {
    grid-column: 2;
    text-align: left;
    padding-left: 16px;
    padding-right: 0;
  }
  .tl-item:nth-child(odd) .tl-dot,
  .tl-item:nth-child(even) .tl-dot { grid-column: 1; }

  .case-meta-row { grid-template-columns: 1fr; }
  .case-detail-img img { height: 260px; }
  .feat-img img { height: 240px; }

  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }

  .cta-banner { flex-direction: column; text-align: center; padding: 32px 24px; }
  .cta-banner .flex { justify-content: center !important; }

  .content-wrap { padding: 28px 20px; }
  .grain-panel { padding: 28px 20px; }
  .nature-card { padding: 24px 20px; }
  .contact-form-card, .contact-info-card { padding: 28px 20px; }

  .job-card { flex-direction: column; align-items: flex-start; }
  .sf-item { grid-template-columns: 56px 1fr; gap: 16px; }
  .sf-num { width: 48px; height: 48px; font-size: 1rem; }

  .page-hero { padding: 120px 0 48px; }
  .back-to-top { right: 16px; bottom: 16px; width: 40px; height: 40px; }
}

/* ========== 小屏 < 480px ========== */
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .hero-stats { gap: 16px; }
  .process-track { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr; }
  .partner-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-band { grid-template-columns: 1fr; }
}