/* ==========================================================================
   山水云 (Shanshui Cloud) - 响应式样式表 responsive.css
   ========================================================================== */

/* 桌面宽屏优化 (1280px 以上) */
@media (min-width: 1280px) {
  .hero-title {
    font-size: 3.5rem;
  }
}

/* 平板横屏与小型桌面 (1024px 以下) */
@media (max-width: 1024px) {
  .platform-cards-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .pricing-cards-container {
    gap: 20px;
  }

  .pricing-card.featured-card {
    transform: none;
  }

  .pricing-card.featured-card:hover {
    transform: translateY(-6px);
  }

  .footer-grid {
    grid-template-columns: 1.5fr 1fr 1fr;
  }

  .footer-legal-col {
    grid-column: span 3;
    display: flex;
    gap: 30px;
  }

  .article-detail-layout {
    grid-template-columns: 1fr;
  }

  .sidebar-sticky {
    position: static;
  }
}

/* 平板竖屏 (768px 以下) */
@media (max-width: 768px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

  .hero-tag {
    display: inline-flex;
    margin: 0 auto 16px;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-desc {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-features-list {
    justify-content: center;
  }

  .hero-cta-group {
    justify-content: center;
  }

  .hero-visual-container {
    max-width: 360px;
    margin: 0 auto;
  }

  .about-art-frame {
    max-width: 360px;
    margin: 0 auto;
  }

  .platform-cards-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
  }

  .pricing-cards-container {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
  }

  .testimonials-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
  }

  .knowledge-cards-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .footer-legal-col {
    grid-column: span 1;
    flex-direction: column;
    gap: 12px;
  }

  /* 移动端导航抽屉菜单 */
  .main-nav {
    position: fixed;
    top: 74px;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: flex-start;
    padding: 24px 30px 36px;
    gap: 18px;
    border-bottom: 1px solid var(--border-light);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 999;
  }

  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-link {
    font-size: 1.1rem;
    width: 100%;
    padding: 8px 0;
    border-bottom: 1px solid #f1f5f9;
  }

  .nav-toggle-btn {
    display: inline-flex;
  }

  .header-action-group .btn-sky {
    padding: 8px 16px;
    font-size: 0.88rem;
  }
}

/* 手机小屏 (480px 以下) */
@media (max-width: 480px) {
  .hero-title {
    font-size: 2.1rem;
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }

  .btn-sakura-pink, .btn-clean-white {
    width: 100%;
  }

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

  .article-main-content {
    padding: 24px 16px;
  }

  .article-main-title {
    font-size: 1.6rem;
  }
}