/* ImageTwin 移动端响应式优化样式 */

@media (max-width: 768px) {
  
  /* ========== 1. 基础调整 ========== */
  html {
    font-size: 14px;
  }

  body {
    font-size: 16px;
  }

  /* ========== 2. 导航栏移动端优化 ========== */
  .nav-container {
    height: 60px;
    padding: 0 16px;
  }

  .logo-img {
    height: 40px;
  }

  .logo-text {
    font-size: 20px;
  }

  .nav-menu {
    position: fixed;
    top: 60px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 60px);
    background: var(--white);
    flex-direction: column;
    padding: 24px;
    gap: 0;
    transition: left 0.3s ease;
    box-shadow: var(--shadow-md);
    overflow-y: auto;
  }

  .nav-menu.active {
    left: 0;
  }

  .nav-menu li {
    width: 100%;
    border-bottom: 1px solid var(--border-color);
  }

  .nav-menu a {
    display: block;
    padding: 16px 0;
    font-size: 16px;
  }

  .hamburger {
    display: flex;
  }

  /* ========== 3. Banner 英雄区移动端 ========== */
  .hero-banner {
    padding: 48px 16px 56px;
  }

  .hero-title {
    font-size: 32px;
    margin-bottom: 16px;
  }

  .hero-subtitle {
    font-size: 16px;
    margin-bottom: 28px;
  }

  .hero-cta {
    flex-direction: column;
    gap: 12px;
  }

  .btn {
    width: 100%;
    padding: 14px 28px;
    font-size: 16px;
    min-height: 48px;
  }

  .trust-badge {
    margin-top: 24px;
    font-size: 13px;
  }

  /* ========== 4. 容器与栅格 ========== */
  .container {
    padding: 0 16px;
  }

  .section {
    padding: 48px 0;
  }

  .section-header {
    margin-bottom: 40px;
  }

  .section-title {
    font-size: 28px;
    margin-bottom: 12px;
  }

  .section-desc {
    font-size: 15px;
  }

  /* ========== 5. 卡片栅格移动端 ========== */
  .card-grid {
    grid-template-columns: 1fr;
    gap: 20px;
    margin-top: 24px;
  }

  .card {
    padding: 24px;
  }

  .card-icon {
    width: 56px;
    height: 56px;
    font-size: 28px;
    margin-bottom: 16px;
  }

  .card-title {
    font-size: 20px;
    margin-bottom: 10px;
  }

  .card-text {
    font-size: 14px;
  }

  /* ========== 6. 表格移动端优化 ========== */
  .table-wrapper {
    margin: 24px -16px;
    border-radius: 0;
  }

  .data-table {
    font-size: 14px;
  }

  .data-table th,
  .data-table td {
    padding: 12px 10px;
    font-size: 13px;
  }

  /* ========== 7. 列表移动端 ========== */
  .feature-list li {
    padding: 10px 0 10px 28px;
    font-size: 15px;
  }

  .feature-list li::before {
    width: 18px;
    height: 18px;
    font-size: 11px;
  }

  .numbered-list li {
    padding: 10px 0 10px 42px;
    font-size: 15px;
  }

  .numbered-list li::before {
    width: 28px;
    height: 28px;
    font-size: 14px;
  }

  /* ========== 8. FAQ 移动端 ========== */
  .faq-container {
    margin: 24px 0;
  }

  .faq-question {
    padding: 16px;
    font-size: 15px;
  }

  .faq-question::after {
    font-size: 24px;
  }

  .faq-answer {
    padding: 0 16px;
  }

  .faq-answer.active {
    padding: 0 16px 16px;
  }

  .faq-answer p {
    font-size: 14px;
  }

  /* ========== 9. 页脚移动端 ========== */
  .footer {
    padding: 40px 16px 20px;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 32px;
    margin-bottom: 32px;
  }

  .footer-section h3 {
    font-size: 16px;
    margin-bottom: 16px;
  }

  .footer-section p,
  .footer-section a {
    font-size: 13px;
  }

  .footer-bottom {
    padding-top: 24px;
    font-size: 12px;
  }

  /* ========== 10. 回到顶部按钮移动端 ========== */
  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 46px;
    height: 46px;
    font-size: 18px;
  }

  /* ========== 11. 灯箱移动端 ========== */
  .lightbox {
    padding: 10px;
  }

  .lightbox img {
    max-width: 95%;
    max-height: 95%;
  }

  .lightbox-close {
    top: 20px;
    right: 20px;
    font-size: 32px;
  }

  /* ========== 12. 间距工具类移动端 ========== */
  .mt-1 { margin-top: 6px; }
  .mt-2 { margin-top: 12px; }
  .mt-3 { margin-top: 18px; }
  .mt-4 { margin-top: 24px; }

  .mb-1 { margin-bottom: 6px; }
  .mb-2 { margin-bottom: 12px; }
  .mb-3 { margin-bottom: 18px; }
  .mb-4 { margin-bottom: 24px; }

  /* ========== 13. 点击目标优化 ========== */
  button, 
  a.btn,
  .faq-question {
    min-height: 48px;
    min-width: 48px;
  }

  /* ========== 14. 文字可读性优化 ========== */
  p, li, td {
    line-height: 1.6;
  }

  /* ========== 15. 图片优化 ========== */
  img {
    border-radius: 8px;
  }

  /* ========== 16. 粘性 CTA 栏 ========== */
  .sticky-cta {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--white);
    padding: 12px 16px;
    box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.1);
    z-index: 998;
    display: flex;
    gap: 10px;
  }

  .sticky-cta .btn {
    flex: 1;
    padding: 12px 20px;
    font-size: 15px;
  }
}

/* ========== 超小屏幕优化 (< 375px) ========== */
@media (max-width: 374px) {
  .hero-title {
    font-size: 28px;
  }

  .section-title {
    font-size: 24px;
  }

  .btn {
    padding: 12px 20px;
    font-size: 15px;
  }

  .card {
    padding: 20px;
  }
}

/* ========== 平板优化 (768px - 1024px) ========== */
@media (min-width: 769px) and (max-width: 1024px) {
  .container {
    padding: 0 32px;
  }

  .hero-title {
    font-size: 42px;
  }

  .section-title {
    font-size: 34px;
  }

  .card-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
}