@charset "UTF-8";
/* ==========================================================================
   响应式断点
   ≥1200px 桌面（基准） / 992-1199 小桌面 / 768-991 平板 / <768 手机 / <576 小屏手机
   ========================================================================== */

/* ---------------------------- ≤1199px ---------------------------- */
@media (max-width: 1199px) {
  :root { --sec-pad: 80px; }

  .hero-title { font-size: 46px; }
  .hero-inner { gap: 40px; }
  .hero-float-card { left: -12px; }
  .sec-title { font-size: 32px; }
  .footer-main { grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; }
  .footer-main .footer-contact-col { grid-column: span 3; }
}

/* ---------------------------- ≤991px ---------------------------- */
@media (max-width: 991px) {
  :root { --sec-pad: 68px; --nav-h: 66px; }

  /* 导航折叠 */
  .nav-toggle { display: block; }

  /* 小屏品牌字相应收一点，避免和汉堡按钮挤在一起 */
  .header-inner .logo-text { font-size: 21px; }

  .nav {
    position: fixed;
    inset: var(--nav-h) 0 auto 0;
    max-height: calc(100vh - var(--nav-h));
    overflow-y: auto;
    padding: 12px 24px 24px;
    background: #fff;
    box-shadow: 0 20px 40px rgba(15, 23, 42, .14);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px);
    transition: opacity var(--t-base) var(--ease), transform var(--t-base) var(--ease),
                visibility var(--t-base) var(--ease);
  }

  .nav.is-open { opacity: 1; visibility: visible; transform: none; }
  .nav-list { flex-direction: column; align-items: stretch; gap: 2px; }

  .nav-link {
    padding: 14px 12px;
    border-radius: var(--r-sm);
    color: var(--c-text);
    font-size: 16px;
  }

  .nav-link::after { display: none; }

  .nav-link:hover,
  .nav-link.is-active {
    background: var(--c-primary-50);
    color: var(--c-primary-700);
  }

  .nav.is-open .nav-list > li { animation: navItemIn .4s var(--ease) both; }
  .nav.is-open .nav-list > li:nth-child(1) { animation-delay: .04s; }
  .nav.is-open .nav-list > li:nth-child(2) { animation-delay: .08s; }
  .nav.is-open .nav-list > li:nth-child(3) { animation-delay: .12s; }
  .nav.is-open .nav-list > li:nth-child(4) { animation-delay: .16s; }
  .nav.is-open .nav-list > li:nth-child(5) { animation-delay: .20s; }

  @keyframes navItemIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: none; }
  }

  /* 移动端打开菜单时页头强制实底，保证可读 */
  .site-header.nav-open { background: #fff; }
  .site-header.nav-open .logo-text { color: var(--c-text); }
  .site-header.nav-open .logo-mark { background: linear-gradient(135deg, var(--c-primary-500), var(--c-primary-700)); color: #fff; }

  /* Hero 纵向堆叠 */
  .hero { padding: calc(var(--nav-h) + 64px) 0 72px; text-align: center; }
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-desc { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .hero-meta { justify-content: center; }
  .hero-title { font-size: 38px; }
  .hero-float-card { left: 50%; bottom: -18px; transform: translateX(-50%); white-space: nowrap; }

  /* 多列降级 */
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 32px 16px; }
  .stat-num { font-size: 36px; }
  .cases-preview { grid-template-columns: repeat(2, 1fr); }
  .cases-grid { grid-template-columns: repeat(2, 1fr); }
  .service-overview { grid-template-columns: 1fr; gap: 40px; }
  .about-intro { grid-template-columns: 1fr; gap: 36px; }
  .values-grid { grid-template-columns: repeat(2, 1fr); }
  .honors-grid { grid-template-columns: repeat(2, 1fr); }
  .service-grid { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: repeat(2, 1fr); gap: 36px 24px; }
  .process-step::after { display: none; }
  .testi-grid { grid-template-columns: 1fr; }
  .contact-layout { grid-template-columns: 1fr; gap: 36px; }

  /* 时间轴转单侧 */
  .timeline::before { left: 9px; transform: none; }
  .tl-item,
  .tl-item:nth-child(even) { width: 100%; margin-left: 0; padding: 0 0 28px 40px; text-align: left; }
  .tl-dot,
  .tl-item:nth-child(even) .tl-dot { left: 0; right: auto; }

  .page-banner { text-align: center; }
  .page-banner h1 { font-size: 32px; }
  .page-banner .page-desc { margin-left: auto; margin-right: auto; }
  .breadcrumb { justify-content: center; }

  .cta-inner h2 { font-size: 28px; }
  .footer-main { grid-template-columns: 1fr 1fr; gap: 36px; }
  .footer-main .footer-contact-col { grid-column: auto; }
  .footer-brand p { max-width: none; }
}

/* ---------------------------- ≤767px ---------------------------- */
@media (max-width: 767px) {
  :root { --sec-pad: 56px; }

  .container { padding: 0 18px; }
  .sec-head { margin-bottom: 36px; }
  .sec-title { font-size: 26px; }
  .sec-desc { font-size: 16px; }

  .hero-title { font-size: 30px; }
  .hero-desc { font-size: 16px; }
  .hero-badge { font-size: 12px; }
  .hero-actions { flex-direction: column; gap: 12px; }
  .hero-actions .btn { width: 100%; }
  .hero-meta { gap: 20px 28px; justify-content: space-around; }
  .hero-meta-item strong { font-size: 20px; }
  .hero-float-card { display: none; }

  .features-grid { grid-template-columns: 1fr; gap: 16px; }
  .feature-card { padding: 28px 22px 32px; }
  .cases-preview { grid-template-columns: 1fr; gap: 20px; }
  .cases-grid { grid-template-columns: 1fr; gap: 20px; }
  .values-grid { grid-template-columns: 1fr; }
  .honors-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .process-grid { grid-template-columns: 1fr; gap: 28px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 24px 12px; }
  .stat-num { font-size: 30px; }
  .stat-num .suffix { font-size: 18px; }

  .page-banner h1 { font-size: 26px; }
  .page-banner .page-desc { font-size: 15px; }

  .sv-item { padding: 18px; }
  .service-card { padding: 26px 22px; }
  .service-head { gap: 12px; }
  .service-points li { font-size: 14px; }
  .service-card .btn { align-self: stretch; }

  .filter-bar { gap: 8px; margin-bottom: 32px; }
  .filter-btn { padding: 8px 16px; font-size: 13px; }

  .faq-item summary { padding: 16px 18px; font-size: 16px; gap: 12px; }
  .faq-body { padding: 0 18px 18px; font-size: 14px; }

  .form-card { padding: 26px 20px; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .info-card { padding: 18px; }
  .map-box { padding: 40px 18px; }

  .error-code { font-size: 96px; }
  .error-page h1 { font-size: 24px; }
  .error-actions { flex-direction: column; }
  .error-actions .btn { width: 100%; }

  .footer-main { grid-template-columns: 1fr; gap: 32px; padding: 48px 0 32px; }
  .footer-bottom-inner { flex-direction: column; text-align: center; }
  .footer-beian { justify-content: center; }

  .to-top { right: 14px; bottom: 14px; width: 42px; height: 42px; }
}

/* ---------------------------- ≤575px ---------------------------- */
@media (max-width: 575px) {
  .hero-title { font-size: 26px; }
  .hero-meta { gap: 16px 20px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .honors-grid { grid-template-columns: 1fr; }
  .case-body { padding: 18px 20px 22px; }
  .error-code { font-size: 76px; }
  .process-num { width: 54px; height: 54px; font-size: 18px; }
}

/* ------------------------ 移动端隐藏装饰线 ------------------------ */
@media (max-width: 991px) {
  .hero::before,
  .hero::after { display: none; }
}

/* ---------------------------- 打印 ---------------------------- */
@media print {
  .site-header,
  .to-top,
  .cta-section,
  .site-footer { display: none !important; }

  body { color: #000; background: #fff; }
  .reveal { opacity: 1 !important; transform: none !important; }
}