/* ========== 响应式适配 ========== */

/* 平板 */
@media (max-width: 1024px) {
  .nav-container { padding: 0 24px; }
  .nav-links { gap: 2px; margin-left: 24px; }
  .nav-link { padding: 6px 10px; font-size: 13px; }
  .hero-container { gap: 36px; padding: 0 24px 60px; }
  .hero-title { font-size: 40px; }
  .hero-blob { width: 380px; height: 380px; }
  .hero-visual { min-height: 380px; }
  .section-container { padding: 0 24px; }
  .home-grid { grid-template-columns: repeat(2, 1fr); }
  .modules-grid { grid-template-columns: repeat(2, 1fr); }
  .cases-grid { grid-template-columns: repeat(3, 1fr); }
  .courses-page-grid { grid-template-columns: repeat(2, 1fr); }
  .comm-grid { grid-template-columns: repeat(2, 1fr); }
}

/* 手机 */
@media (max-width: 768px) {
  :root { --nav-h: 60px; }

  /* 移动端导航 */
  .nav-toggle { display: flex; }
  .nav-container { padding: 0 16px; }
  .nav-links {
    display: none;
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    flex-direction: column;
    padding: 12px 16px 16px;
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-md);
    gap: 2px;
    margin-left: 0;
    z-index: 999;
  }
  .nav-links.open { display: flex; }
  .nav-links .nav-link {
    padding: 12px 16px;
    font-size: 15px;
    border-radius: 12px;
    width: 100%;
  }
  .nav-links .nav-link:hover,
  .nav-links .nav-link.active {
    background: var(--leaf-bg);
  }
  .nav-cta { display: none; }

  .hero-section { padding-top: calc(var(--nav-h) + 40px); }
  .hero-container { flex-direction: column; gap: 32px; padding: 0 16px 48px; text-align: center; }
  .hero-text { max-width: 100%; }
  .hero-title { font-size: 32px; }
  .hero-desc { font-size: 15px; }
  .hero-actions { justify-content: center; flex-wrap: wrap; }
  .hero-stats { justify-content: center; gap: 24px; }
  .hero-stat { text-align: center; }
  .hero-stat-num { font-size: 28px; }
  .hero-visual { min-height: 280px; }
  .hero-blob { width: 280px; height: 280px; }

  .page-hero { padding-top: calc(var(--nav-h) + 32px); padding-bottom: 32px; }
  .page-hero .section-title { font-size: 28px; }

  .section { padding: 48px 0; }
  .section-container { padding: 0 16px; }
  .section-title { font-size: 26px; }

  .home-grid { grid-template-columns: 1fr; gap: 14px; }
  .home-card { padding: 24px 20px; }

  .modules-grid { grid-template-columns: 1fr; }
  .cases-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .courses-page-grid { grid-template-columns: 1fr; }
  .res-page-grid { grid-template-columns: 1fr; }
  .comm-stats { grid-template-columns: 1fr; }
  .comm-grid { grid-template-columns: 1fr; }
  .ai-features { grid-template-columns: 1fr; }

  .modal-panel { width: 96%; max-width: none; border-radius: 20px; max-height: 90vh; }
  .detail-cover, img.detail-cover { height: 180px; }

  .comm-topic { flex-direction: column; align-items: flex-start; gap: 8px; }
  .comm-topic-meta { text-align: left; display: flex; gap: 12px; }

  .footer-container { padding: 0 16px; }

  /* 移动端AI聊天优化 */
  .ai-chat-full .chat-messages { height: 350px; padding: 12px 16px; }
  .ai-chat-full .chat-input-area { padding: 10px 16px 14px; }
  .ai-chat-full .ai-quick-actions { padding: 12px 16px 8px; }
  .chat-msg { max-width: 90%; }
}

/* 小手机 */
@media (max-width: 480px) {
  .hero-title { font-size: 26px; }
  .hero-blob { width: 220px; height: 220px; }
  .hero-visual { min-height: 240px; }
  .cases-grid { grid-template-columns: 1fr; }
  .btn-hero-primary, .btn-hero-outline { padding: 12px 24px; font-size: 14px; }
  .res-page-item { flex-direction: column; align-items: flex-start; gap: 12px; }
  .res-page-badge { align-self: flex-start; }
  .comm-group { flex-direction: column; text-align: center; }
  .comm-group-badge { justify-content: center; }
}