/* ============================================
   首都机器人大管家 · 手机版专属
   ≤ 768px 生效，电脑端完全不变
   ============================================ */

.mobile-bottom-bar { display: none; }

@media (max-width: 768px) {

  /* ============================================
     设计规范（手机通用）
     ============================================ */
  :root {
    --card-bg: rgba(30,41,59,0.35);
    --card-border: 1px solid rgba(99,102,241,0.08);
    --radius: 10px;
    --gap: 8px;
    --p-card: 14px;
    --p-section: 22px 16px;
    --text-pri: #fff;
    --text-sec: rgba(255,255,255,0.5);
    --text-tri: rgba(255,255,255,0.35);
  }

  *, *::before, *::after { box-sizing: border-box; }
  img { max-width: 100% !important; height: auto !important; }
  .section-inner { padding: var(--p-section) !important; max-width: 100% !important; }
  .section-title { font-size: 19px !important; line-height: 1.3; margin-bottom: 8px !important; }
  .section-desc { font-size: 12px !important; line-height: 1.5; color: var(--text-sec) !important; margin-bottom: 14px; }
  .section-label { font-size: 9px !important; letter-spacing: 2px !important; margin-bottom: 4px !important; color: #818cf8 !important; }

  body { padding-bottom: 64px; }

  /* ---------- 导航（两行固定） ---------- */
  nav {
    position: sticky !important; top: 0 !important; z-index: 9999 !important;
    background: rgba(13,19,38,0.97) !important;
    backdrop-filter: blur(16px) !important;
    border-bottom: 1px solid rgba(99,102,241,0.1) !important;
    padding: 6px 14px !important;
    display: flex !important;
    flex-wrap: wrap !important;
    align-items: center !important;
    gap: 3px 6px !important;
  }
  nav .logo { font-size: 14px !important; flex: 1; min-width: 0; }
  nav .logo span { display: none !important; }
  nav .nav-cta {
    padding: 5px 12px !important;
    font-size: 11px !important;
    border-radius: 14px !important;
    flex-shrink: 0;
    font-weight: 700;
  }
  nav .nav-links {
    display: flex !important;
    width: 100%;
    gap: 4px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
    padding: 4px 0 0;
    margin: 0;
    list-style: none;
  }
  nav .nav-links::-webkit-scrollbar { display: none; }
  nav .nav-links li { flex-shrink: 0; }
  nav .nav-links a {
    display: block;
    font-size: 11px;
    white-space: nowrap;
    padding: 3px 10px;
    border-radius: 12px;
    background: rgba(255,255,255,0.05);
    color: var(--text-sec);
    text-decoration: none;
    font-weight: 600;
  }

  /* ---------- 紧急横幅 ---------- */
  .top-bar { font-size: 10px !important; padding: 5px 14px !important; line-height: 1.4; letter-spacing: 0 !important; }

  /* ---------- Hero ---------- */
  .hero-content {
    flex-direction: column !important;
    gap: 8px !important;
    padding: 10px 16px 16px !important;
  }
  .hero-left h1 {
    font-size: 18px !important;
    line-height: 1.3;
  }
  .hero-left h1 .hl { font-size: 22px !important; }
  .hero-badge { font-size: 9px !important; padding: 2px 8px !important; margin-bottom: 2px; display: inline-block; }
  .hero-left .sub { font-size: 12px !important; margin-top: 4px !important; }
  .hero-cta-group { flex-direction: column !important; gap: 6px !important; margin-top: 4px; }
  .hero-cta-primary, .hero-cta-secondary {
    width: 100% !important;
    text-align: center !important;
    padding: 10px 14px !important;
    font-size: 14px !important;
    border-radius: var(--radius) !important;
    display: block;
  }
  .hero-img-wrap {
    max-width: 320px !important;
    margin: 0 auto;
    aspect-ratio: 1 !important;
    border-radius: 14px !important;
  }
  .hero-img-wrap img {
    width: 100% !important;
    height: auto !important;
    border-radius: 14px;
  }
  .hero-img-wrap .carousel-slide {
    height: 100% !important;
    object-fit: cover;
  }

  /* ---------- 服务（手机版：卡片列表） ---------- */
  .services-grid {
    display: flex !important;
    flex-direction: column !important;
    gap: var(--gap) !important;
  }
  .service-card {
    display: flex !important;
    align-items: center !important;
    gap: 10px !important;
    padding: var(--p-card) !important;
    background: var(--card-bg) !important;
    border: var(--card-border) !important;
    border-radius: var(--radius) !important;
    text-align: left !important;
  }
  .service-card .img-wrap,
  .service-card .badge {
    display: none !important;
  }
  .service-card .info {
    padding: 0 !important;
    flex: 1;
    min-width: 0;
  }
  .service-card .info h3 { font-size: 14px !important; margin-bottom: 2px; font-weight: 700; }
  .service-card .info p { font-size: 12px !important; line-height: 1.4; color: var(--text-sec); }
  .service-card .info .tags { display: none !important; }

  /* ---------- 数据统计 ---------- */
  .stats-grid {
    display: grid !important;
    grid-template-columns: 1fr 1fr !important;
    gap: var(--gap) !important;
  }
  .stat-item {
    padding: 14px 10px !important;
    border-radius: var(--radius) !important;
    text-align: center;
    background: var(--card-bg) !important;
    border: var(--card-border) !important;
  }
  .stat-item .num { font-size: 22px !important; }
  .stat-item .label { font-size: 11px !important; margin-top: 2px; color: var(--text-sec); }
  .stat-item .desc { display: none !important; }

  /* ---------- 流程 ---------- */
  .process-grid {
    display: grid !important;
    grid-template-columns: 1fr 1fr 1fr !important;
    gap: var(--gap) !important;
  }
  .process-card {
    padding: 10px 6px !important;
    border-radius: var(--radius) !important;
    text-align: center;
    background: var(--card-bg) !important;
    border: var(--card-border) !important;
  }
  .process-card .num { width: 22px; height: 22px; font-size: 10px; line-height: 22px; margin: 0 auto 3px; }
  .process-card .icon { font-size: 20px !important; }
  .process-card .label { font-size: 11px !important; font-weight: 700 !important; }
  .process-card .sub { display: none !important; }

  /* ---------- 场景案例（手机版：简洁图片墙） ---------- */
  .scenes-grid {
    display: grid !important;
    grid-template-columns: 1fr 1fr !important;
    gap: var(--gap) !important;
  }
  .scene-card {
    border-radius: var(--radius) !important;
    overflow: hidden;
    background: var(--card-bg) !important;
    border: var(--card-border) !important;
  }
  .scene-card .img-wrap {
    width: 100% !important;
    height: 120px !important;
  }
  .scene-card .img-wrap img {
    width: 100% !important;
    height: 100% !important;
    object-fit: cover;
  }
  .scene-card .info {
    padding: 8px 10px !important;
  }
  .scene-card .info .scene { font-size: 9px !important; padding: 2px 8px !important; }
  .scene-card .info h4 { font-size: 12px !important; margin: 2px 0 0 !important; line-height: 1.3; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .scene-card .info p { display: none !important; }

  /* ---------- 优势 ---------- */
  .adv-grid {
    display: flex !important;
    flex-direction: column !important;
    gap: var(--gap) !important;
  }
  .adv-card {
    padding: 14px 16px !important;
    border-radius: var(--radius) !important;
    background: var(--card-bg) !important;
    border: var(--card-border) !important;
    display: flex !important;
    align-items: center !important;
    gap: 10px !important;
    text-align: left !important;
  }
  .adv-card .icon { font-size: 26px !important; flex-shrink: 0; }
  .adv-card .adv-body { flex: 1; min-width: 0; }
  .adv-card h3 { font-size: 13px !important; margin-bottom: 2px; }
  .adv-card p { font-size: 11px !important; line-height: 1.4; color: var(--text-sec); margin: 0; }

  /* ---------- FAQ ---------- */
  .faq-item {
    padding: 10px 14px !important;
    margin-bottom: 6px;
    border-radius: var(--radius) !important;
    background: var(--card-bg) !important;
    border: var(--card-border) !important;
  }
  .faq-item .question { font-size: 13px !important; font-weight: 700 !important; }
  .faq-item .answer { font-size: 11px !important; line-height: 1.5 !important; margin-top: 4px; color: var(--text-sec); }

  /* ---------- 联系 ---------- */
  #contact { padding: 0 !important; }
  #contact .section-inner {
    display: flex !important;
    flex-direction: column !important;
    gap: 16px !important;
  }
  .contact-form {
    padding: var(--p-card) !important;
    border-radius: var(--radius) !important;
  }
  .contact-form input,
  .contact-form select,
  .contact-form textarea {
    font-size: 15px !important;
    padding: 10px 12px !important;
    border-radius: 8px !important;
    width: 100% !important;
    margin-bottom: 6px;
  }
  .form-submit {
    width: 100% !important;
    padding: 13px !important;
    font-size: 15px !important;
    border-radius: var(--radius) !important;
  }
  .contact-info { text-align: center; }
  .contact-info .phone { font-size: 18px !important; display: block; margin: 4px 0; }
  .contact-info .qr-wrap { max-width: 100px; margin: 6px auto 0; }

  /* ---------- 底部 ---------- */
  footer { padding: 16px 16px 68px !important; }
  footer .footer-grid { display: block !important; text-align: center; }
  footer .footer-grid > div { margin-bottom: 8px; }
  footer .footer-grid h4 { font-size: 12px !important; }
  footer .footer-grid p,
  footer .footer-grid a { font-size: 10px !important; color: var(--text-tri) !important; }

  /* ---------- 客户报修页 ---------- */
  .repair-form, .apply-form {
    padding: var(--p-card) !important;
    border-radius: var(--radius) !important;
  }
  .repair-form input, .apply-form input,
  .repair-form select, .apply-form select,
  .repair-form textarea, .apply-form textarea {
    font-size: 15px !important;
    padding: 10px 12px !important;
    border-radius: 8px !important;
    width: 100% !important;
    margin-bottom: 6px;
  }
  .repair-form button, .apply-form button {
    width: 100% !important;
    padding: 13px !important;
    font-size: 15px !important;
    border-radius: var(--radius) !important;
  }
  .issues-grid {
    display: grid !important;
    grid-template-columns: 1fr 1fr !important;
    gap: 6px !important;
  }
  .issue-card {
    padding: 10px !important;
    border-radius: var(--radius) !important;
    text-align: center;
    background: var(--card-bg) !important;
    border: var(--card-border) !important;
  }
  .issue-card .icon { font-size: 20px !important; }
  .issue-card .name { font-size: 11px !important; }

  /* ---------- 工程师页 ---------- */
  .join-steps { flex-direction: column !important; gap: var(--gap) !important; }
  .join-step { width: 100% !important; padding: 10px !important; }

  /* ---------- 底部悬浮 ---------- */
  .mobile-bottom-bar {
    display: flex; position: fixed;
    bottom: 0; left: 0; right: 0; z-index: 99999;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    padding: 6px 12px;
    box-shadow: 0 -4px 16px rgba(0,0,0,0.5);
    justify-content: center; align-items: center;
  }
  .mobile-bottom-bar a {
    display: flex; align-items: center; justify-content: center; gap: 6px;
    width: 100%; padding: 13px 20px;
    border-radius: var(--radius);
    background: rgba(255,255,255,0.18);
    color: #fff;
    font-size: 18px; font-weight: 800; letter-spacing: 0.5px;
    text-decoration: none;
    -webkit-tap-highlight-color: transparent;
  }

  /* ---------- 返回顶部 ---------- */
  .back-home {
    bottom: 72px !important;
    right: 8px !important;
    padding: 5px 10px !important;
    font-size: 9px !important;
    border-radius: 12px !important;
  }
}

/* ============================================
   横屏
   ============================================ */
@media (min-width: 481px) and (max-width: 900px) and (orientation: landscape) {
  nav { flex-wrap: nowrap !important; }
  nav .logo { font-size: 13px !important; flex: 0; margin-right: 8px; }
  nav .nav-links { width: auto !important; flex: 1; padding: 0 !important; }
  nav .nav-links a { font-size: 10px !important; padding: 2px 8px !important; }
  .section-inner { padding: 18px 20px !important; }

  .hero-content { flex-direction: row !important; align-items: center !important; gap: 16px !important; }
  .hero-left { flex: 1; }
  .hero-left h1 { font-size: 18px !important; }
  .hero-cta-group { flex-direction: row !important; gap: 8px !important; }
  .hero-cta-primary, .hero-cta-secondary { width: auto !important; padding: 8px 14px !important; font-size: 13px !important; }
  .hero-img-wrap { max-width: 180px !important; }

  .services-grid { display: grid !important; grid-template-columns: 1fr 1fr !important; }
  .adv-grid { display: grid !important; grid-template-columns: 1fr 1fr !important; }
  .scenes-grid { grid-template-columns: 1fr 1fr 1fr !important; }
  .scenes-grid .scene-card .img-wrap { height: 90px !important; }
  #contact .section-inner { flex-direction: row !important; gap: 20px !important; }
  .mobile-bottom-bar { padding: 4px 16px; }
  .mobile-bottom-bar a { padding: 10px; font-size: 15px; width: auto; max-width: 360px; }
  body { padding-bottom: 50px; }
  .process-grid { grid-template-columns: repeat(5,1fr) !important; }
}

/* ============================================
   极小屏 (≤ 400px)
   ============================================ */
@media (max-width: 400px) {
  nav .logo { font-size: 12px !important; }
  .hero-left h1 { font-size: 16px !important; }
  .hero-left h1 .hl { font-size: 19px !important; }
  .section-title { font-size: 16px !important; }
  .hero-img-wrap { max-width: 220px !important; }
  .service-card { padding: 10px !important; gap: 8px !important; }
  .service-card .info h3 { font-size: 13px !important; }
  .service-card .info p { font-size: 11px !important; }
  .stat-item .num { font-size: 18px !important; }
  .stat-item { padding: 10px 8px !important; }
  .process-grid { grid-template-columns: 1fr 1fr !important; }
  .scenes-grid .scene-card .img-wrap { height: 80px !important; }
  .scenes-grid { gap: 6px !important; }
  .issues-grid { grid-template-columns: 1fr !important; }
  .adv-card { padding: 10px 12px !important; }
  .adv-card .icon { font-size: 22px !important; }
  .mobile-bottom-bar a { font-size: 15px; padding: 11px; }
}

/* 2026-08 mobile overflow correction */
@media (max-width: 768px) {
  html, body { max-width: 100% !important; overflow-x: hidden !important; }
  .contact-section { padding: 28px 16px !important; }
  .contact-section > div { width: 100% !important; max-width: 100% !important; }
  .contact-section > div > div[style*="grid-template-columns"] {
    display: grid !important;
    grid-template-columns: 1fr !important;
    gap: 12px !important;
  }
  .contact-section > div > div[style*="grid-template-columns"] > div { width: 100% !important; min-width: 0 !important; }
}