/* 平板布局。 */
@media (max-width: 1040px) {
  .desktop-nav {
    display: none;
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1fr) minmax(350px, 0.7fr);
    gap: 34px;
  }

  .hero h1 {
    font-size: clamp(46px, 6.2vw, 66px);
  }

  .hero-proof {
    gap: 20px;
  }

  .agent-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .agent-grid article:last-child {
    grid-column: auto;
  }

  .deliverables-layout {
    grid-template-columns: minmax(0, 0.74fr) minmax(440px, 1.26fr);
    gap: 44px;
  }

  .boundary-copy {
    padding: 44px;
  }

  .final-cta {
    grid-template-columns: 1fr;
  }

  .final-actions {
    justify-content: flex-start;
  }
}

/* 手机布局：切换为竖版背景图，并避免关键视觉被文字遮挡。 */
@media (max-width: 720px) {
  .site-header {
    width: calc(100% - 32px);
    min-height: 72px;
  }

  .brand-copy small {
    display: none;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
  }

  .header-cta {
    min-height: 38px;
    padding: 0 13px;
    font-size: 12px;
  }

  .hero {
    min-height: auto;
  }

  .hero-backdrop {
    background-image:
      linear-gradient(180deg, rgba(4, 12, 31, 0.26) 0%, rgba(4, 12, 31, 0.22) 42%, rgba(4, 12, 31, 0.9) 72%, #050d20 100%),
      url("assets/agentflow-home-hero-mobile.png");
    background-position: center top;
  }

  .hero-inner {
    width: calc(100% - 32px);
    min-height: 980px;
    padding: 96px 0 54px;
    grid-template-columns: 1fr;
    gap: 30px;
    align-content: end;
  }

  .hero-copy {
    padding-top: 315px;
  }

  .release-chip {
    margin-bottom: 17px;
    font-size: 11px;
  }

  .hero h1 {
    margin-bottom: 18px;
    font-size: clamp(40px, 12vw, 55px);
    line-height: 1.1;
  }

  .hero-lead {
    margin-bottom: 25px;
    font-size: 16px;
    line-height: 1.75;
  }

  .hero-actions,
  .final-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .button {
    width: 100%;
  }

  .hero-proof {
    display: grid;
    margin-top: 30px;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
  }

  .hero-proof div {
    border-top: 1px solid rgba(255, 255, 255, 0.14);
    padding-top: 13px;
  }

  .hero-proof strong {
    font-size: 14px;
  }

  .hero-proof span {
    font-size: 10px;
    line-height: 1.45;
  }

  .hero-console {
    padding: 14px;
    border-radius: 20px;
  }

  .console-flow li {
    grid-template-columns: 32px 1fr;
  }

  .console-flow em {
    display: none;
  }

  .console-footer {
    display: grid;
    gap: 6px;
  }

  .scroll-hint {
    display: none;
  }

  .section {
    width: calc(100% - 32px);
    padding: 78px 0;
  }

  .section-heading {
    margin-bottom: 34px;
  }

  .section-heading h2,
  .boundary-copy h2,
  .final-cta h2 {
    font-size: 34px;
  }

  .section-heading > p:last-child,
  .boundary-copy > p:last-child {
    font-size: 15px;
  }

  .value-grid,
  .workflow-board,
  .agent-grid,
  .mode-grid {
    grid-template-columns: 1fr;
  }

  .value-card {
    min-height: 248px;
    padding: 25px;
  }

  .value-index {
    margin-bottom: 42px;
  }

  .workflow-line {
    display: none;
  }

  .workflow-step {
    min-height: 0;
    padding: 23px;
    grid-template-columns: 48px 1fr;
    gap: 14px;
  }

  .step-icon {
    width: 48px;
    height: 48px;
    border-radius: 14px;
  }

  .agents-section {
    padding: 78px 16px;
  }

  .agents-intro {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .agent-principle {
    min-width: 0;
    margin-top: -10px;
    margin-bottom: 34px;
  }

  .agent-grid article {
    min-height: 192px;
  }

  .agent-grid article > span {
    margin-bottom: 34px;
  }

  .deliverables-layout,
  .boundary-panel {
    grid-template-columns: 1fr;
  }

  .sticky-heading {
    position: static;
    margin-bottom: 34px;
  }

  .deliverable-stack article {
    min-height: 0;
    padding: 20px;
    grid-template-columns: 58px 1fr;
    gap: 16px;
  }

  .file-type {
    width: 56px;
    height: 68px;
  }

  .boundary-section {
    width: calc(100% - 20px);
  }

  .boundary-copy {
    min-height: 0;
    padding: 38px 26px;
  }

  .boundary-list {
    padding: 12px;
  }

  .boundary-list article {
    padding: 17px;
  }

  .mode-grid article {
    min-height: 260px;
    padding: 25px;
  }

  .mode-grid article > span {
    margin-bottom: 38px;
  }

  .final-cta {
    width: calc(100% - 20px);
    margin-bottom: 18px;
    border-radius: 24px;
    padding: 40px 24px;
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .site-footer {
    width: calc(100% - 32px);
    padding: 34px 0;
    grid-template-columns: 1fr;
    gap: 18px;
    text-align: center;
  }

  .footer-brand,
  .site-footer > div:last-child {
    justify-content: center;
  }
}

/* 尊重系统减少动态效果设置。 */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}