/* ----------------------------------------------------------------
   responsive.css — breakpoints & mobile adaptations
   ---------------------------------------------------------------- */

@media (max-width: 1100px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  /* 品牌列与二维码列各占满整行，四个链接列两两并排，避免半行留白 */
  .footer-brand { grid-column: 1 / -1; }
  .footer-col--qr { grid-column: 1 / -1; }
  .big-stat { grid-template-columns: repeat(2, 1fr); }
  .kpi-row { grid-template-columns: repeat(2, 1fr); }
  .honor-grid { grid-template-columns: repeat(3, 1fr); }
  .culture-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 960px) {
  :root {
    --space-9: 64px;
    --space-8: 48px;
    --space-7: 32px;
  }
  .section { padding: var(--space-8) 0; }
  .nav-list, .nav-cta .btn:not(.nav-toggle) { display: none; }
  .nav-toggle { display: inline-flex; }

  .hero { min-height: 560px; padding: 100px 0 60px; }
  .hero .hero-grid { grid-template-columns: 1fr; }
  /* 首屏右侧「三大业务板块」改为随单列展示，避免内容缺失与留白 */
  .hero-side { padding: var(--space-5); }

  .founder { grid-template-columns: 1fr; text-align: center; padding: var(--space-6); }
  .founder .avatar { margin: 0 auto; width: 160px; height: 160px; font-size: 60px; }
  .founder .role { margin-left: auto; margin-right: auto; }

  .case-card { grid-template-columns: 1fr; }
  .case-card .case-art { min-height: 200px; }

  .solu-tile, .solu-tile--reverse { grid-template-columns: 1fr; }
  .solu-tile--reverse .solu-art { order: 0; }
  .solu-tile--reverse .solu-body { order: 0; }
  .solu-tile .solu-art { height: 140px; }

  /* 三列网格在 960 以下先改为两列，避免卡片标题被过度压窄而换行 */
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  /* feature-list 嵌在 grid-2 半列内，960 以下改单列避免标题被挤换行 */
  .feature-list { grid-template-columns: 1fr; }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }

  .process-flow { grid-template-columns: repeat(3, 1fr); }
  .process-flow .process-step:nth-child(3)::after { display: none; }
  .process-flow .process-step:nth-child(6)::after { display: none; }

  .service-row { grid-template-columns: 1fr; }

  .honor-grid { grid-template-columns: 1fr 1fr; }
  .branch-list { grid-template-columns: 1fr; }
  .cert-badge-row { grid-template-columns: 1fr; }

  .form-row { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  body { font-size: 15px; }
  h1 { font-size: 30px; }
  h2 { font-size: 24px; }
  .section-head { margin-bottom: var(--space-6); }
  /* 紧凑型区块（快速跳转条）在窄屏同步收紧，与桌面端保持同一比例 */
  .section--jump { padding: var(--space-4) 0; }

  .grid-2 { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr; }

  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: var(--space-3); }
  /* 窄屏下二维码列回落到单列起点，两张码仍并排且保持可扫码尺寸；
     极端窄屏由 flex-wrap 自动换行，不做缩放以免影响识别 */
  .footer-col--qr { grid-column: auto; }
  .footer-col--qr .footer-qr-row { flex-wrap: wrap; gap: var(--space-4); }

  .feature-list { grid-template-columns: 1fr; }
  .adv-grid { grid-template-columns: 1fr; }
  .honor-grid { grid-template-columns: 1fr; }
  .culture-grid { grid-template-columns: 1fr; }
  .stat-row { grid-template-columns: 1fr; }

  .process-flow { grid-template-columns: repeat(2, 1fr); }
  .process-flow .process-step::after { display: none; }

  .hero h1 { font-size: 32px; }
  .hero p.lead { font-size: 15px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; }

  .kpi-row { grid-template-columns: 1fr 1fr; }
  .kpi .kpi-num { font-size: 32px; }
  .big-stat { padding: var(--space-6) var(--space-5); }
  .big-stat .item .num { font-size: 28px; }

  .solu-banner { padding: var(--space-7) var(--space-5); }
  .page-header { padding: 60px 0 40px; }
  /* 页面主标题按容器宽度动态缩放，保证长标题在移动端单行完整显示 */
  .page-header h1 { font-size: clamp(15px, 3.6vw, 28px); white-space: nowrap; }

  .form-card, .cta-band { padding: var(--space-5); }

  .feature-list, .solu-tile .solu-list { grid-template-columns: 1fr; }

  /* Mobile nav drawer */
  .nav-drawer {
    position: fixed;
    inset: 72px 0 0;
    background: #FFFFFF;
    padding: var(--space-6);
    z-index: 99;
    transform: translateX(100%);
    transition: transform var(--duration-base) var(--ease-out);
    overflow-y: auto;
  }
  .nav-drawer.is-open { transform: translateX(0); }
  .nav-drawer .nav-list {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .nav-drawer .nav-list li { border-bottom: 1px solid var(--color-border); }
  .nav-drawer .nav-list a { display: block; padding: var(--space-4) 0; font-size: 16px; }
  .nav-drawer .nav-list a::after { display: none; }
  .nav-drawer .nav-cta-mobile { margin-top: var(--space-5); }
  .nav-drawer .nav-cta-mobile .btn { width: 100%; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .process-flow { grid-template-columns: 1fr; }
  .solu-tile .solu-kpis { grid-template-columns: 1fr; }
  .big-stat { grid-template-columns: 1fr; }
  .kpi-row { grid-template-columns: 1fr; }
  .hero { min-height: 480px; padding: 80px 0 40px; }
}

@media (min-width: 721px) {
  .nav-drawer { display: none; }
}

/* =================================================================
   首页新增组件的响应式适配（实景大卡片 / Hero 数据条 / 地图图注）
   ================================================================= */

@media (max-width: 1100px) {
  .ind-card { min-height: 280px; }
}

@media (max-width: 960px) {
  .hero-stats { margin-top: var(--space-6); gap: var(--space-5); }
  .hero-stats strong { font-size: 22px; }
  .hero p.lead { max-width: none; }
}

@media (max-width: 720px) {
  .ind-card { min-height: 240px; padding: var(--space-5); }
  .ind-card h3 { font-size: 18px; }
  .ind-card .card-icon { width: 48px; height: 48px; }
  .ind-card .card-icon img { width: 26px; height: 26px; }

  .hero-stats { padding-top: var(--space-4); gap: var(--space-4) var(--space-5); }
  .about-figure figcaption { font-size: 12px; padding: var(--space-3) var(--space-4); }
  .cta-band--photo h2 { font-size: 22px; }
}

@media (max-width: 480px) {
  /* 数据条两列等宽，避免窄屏挤压换行 */
  .hero-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
  }
  .ind-grid { gap: var(--space-4); }
}

/* =================================================================
   内页实景背景（page-header / solu-banner / case-art / big-stat）
   的窄屏适配：横幅变矮后改用纵向遮罩，保证文字对比度
   ================================================================= */

@media (max-width: 960px) {
  .card--feature .card-cover { height: 156px; }
  /* 双栏企业简介在 960 以下改为单列，避免左侧标题容器过窄导致被迫缩小字号 */
  .about-grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .page-header { padding: 72px 0 48px; }
  .page-header::before {
    background: linear-gradient(
      180deg,
      rgba(6,20,46,0.82) 0%,
      rgba(6,20,46,0.70) 45%,
      rgba(6,20,46,0.92) 100%
    );
  }
  .solu-banner::before,
  .solu-banner--data::before {
    background: linear-gradient(
      180deg,
      rgba(6,20,46,0.72) 0%,
      rgba(6,20,46,0.90) 100%
    );
  }
  .case-card .case-art { min-height: 200px; }
  .solu-art > svg { width: 52px; height: 52px; }
}

/* ============================================================
   品牌标识（左上角 Logo）响应式缩放
   - 只调 height，宽度保持 auto → 比例恒定、不变形、不模糊；
   - 同步收窄底衬内边距与导航条高度，小屏不挤占汉堡菜单。
   ============================================================ */
@media (max-width: 1100px) {
  .nav-logo img { height: 46px; }
  .nav-logo { padding: 7px 14px; }
  .nav-bar { height: 80px; }
}
@media (max-width: 960px) {
  .nav-logo img { height: 42px; }
  .nav-logo { padding: 6px 12px; margin-right: 12px; }
  .nav-bar { height: 76px; }
}
@media (max-width: 720px) {
  .nav-logo img { height: 38px; }
  .nav-logo { padding: 5px 10px; margin-right: 8px; border-radius: 14px; }
  .nav-bar { height: 72px; gap: var(--space-3); }
}
@media (max-width: 480px) {
  .nav-logo img { height: 32px; }
  .nav-logo { padding: 4px 8px; margin-right: 4px; }
  .nav-bar { height: 64px; }
  .nav-drawer { inset: 64px 0 0; } /* 与收窄后的导航条对齐，抽屉不遮挡 Logo */
}