/* ==========================================================
   responsive.css — 响应式断点（1200 / 768）
   ========================================================== */

/* ---------- ≤1199px ---------- */
@media (max-width: 1199px) {
  .main-nav > ul > li > a { padding: 30px 12px; font-size: 15px; }
  .head-tel .num { font-size: 20px; }
  .proj-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(3, 1fr); row-gap: 34px; }
  .steps::before { display: none; }
  .sample-grid { grid-template-columns: repeat(3, 1fr); }
  .about-feats { grid-template-columns: repeat(2, 1fr); }
  .footer-main { grid-template-columns: 1fr 1fr; }
  .two-col { grid-template-columns: 220px 1fr; gap: 24px; }
}

/* ---------- ≤991px：导航折叠 ---------- */
@media (max-width: 991px) {
  .topbar { display: none; }
  .site-header .container { height: 66px; gap: 14px; }
  .logo img { height: 42px; }
  .head-tel { display: none; }
  .nav-toggle { display: block; }

  .main-nav {
    position: fixed; top: 66px; right: 0; bottom: 0;
    width: 40%; margin: 0; background: #fff;
    overflow-y: auto; overflow-x: hidden; -webkit-overflow-scrolling: touch;
    transform: translateX(100%);
    visibility: hidden;
    transition: transform .3s, visibility .3s;
    z-index: 94;
    box-shadow: -4px 0 20px rgba(0,0,0,.1);
  }
  .nav-open .main-nav { transform: translateX(0); visibility: visible; }
  .main-nav > ul { flex-direction: column; padding: 0; margin: 0; }
  .main-nav > ul > li { margin: 0; padding: 0; }
  .main-nav > ul > li > a { padding: 14px 22px; border-bottom: 1px solid var(--border); text-align: right; }
  .main-nav > ul > li > a::after { display: none; }
  .main-nav .drop {
    position: static; transform: none !important;
    top: auto; left: auto; min-width: 0;
    opacity: 1; visibility: visible;
    box-shadow: none; border-radius: 0;
    background: var(--bg-gray);
    display: none; padding: 6px 0;
    margin: 0; width: 100%;
    transition: none;
    z-index: auto;
  }
  .main-nav > ul > li:hover .drop { transform: none !important; }
  .main-nav > ul > li.open .drop { display: block; }
  .site-header:not(.nav-open) .main-nav .drop { display: none !important; }
  .main-nav .drop a { padding: 10px 18px; color: var(--text-sub); font-size: 14px; display: block; text-align: right; }
  .main-nav .drop a:hover { color: var(--brand-deep); }

  .about-grid { grid-template-columns: 1fr; gap: 30px; }
  .news-panel.on { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .two-col { grid-template-columns: 1fr; }
  .side-nav { position: static; }
}

/* ---------- ≤767px ---------- */
@media (max-width: 767px) {
  body { font-size: 15px; }
  .section { padding: 48px 0; }
  .home .section { padding: 52px 0; }
  .sec-head { margin-bottom: 30px; }

  .hero-slide { min-height: 330px; padding: 46px 16px; }
  .hero .kw span { font-size: 12px; padding: 5px 12px; }
  .hero .acts .btn { padding: 10px 24px; font-size: 14px; }

  .proj-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; gap: 26px; }
  .step { display: grid; grid-template-columns: 62px 1fr; grid-template-rows: auto auto; gap: 4px 16px; text-align: left; align-items: start; }
  .step .num { margin: 0; grid-row: 1 / 3; }
  .step h3 { margin: 0; }
  .sample-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .about-nums { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .qa-grid { grid-template-columns: 1fr; }

  /* 费用表转卡片 */
  .fee-wrap { overflow: visible; box-shadow: none; }
  .fee-table { min-width: 0; }
  .fee-table caption { display: block; padding: 0 18px 10px; text-align: left; font-size: 13px; }
  .fee-table thead { display: none; }
  .fee-table, .fee-table tbody, .fee-table tr, .fee-table td { display: block; width: 100%; }
  .fee-table tr { background: #fff; border: 1px solid var(--border); border-radius: 10px; margin-bottom: 14px; padding: 8px 0; overflow: hidden; }
  .fee-table td { border: 0; text-align: left; padding: 8px 18px; display: flex; justify-content: space-between; gap: 14px; font-size: 14px; word-break: break-word; }
  .fee-table td::before { content: attr(data-label); color: var(--text-light); flex: none; max-width: 40%; }
  .fee-table td:first-child { font-size: 16px; color: var(--brand-deep); background: var(--brand-bg-2); border-radius: 8px; margin: 0 8px 4px; padding: 10px 12px; display: block; width: calc(100% - 16px); }
  .fee-table td:first-child::before { content: none; }

  .footer-main { grid-template-columns: 1fr 1fr; gap: 24px; padding: 40px 0 30px; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-contact { grid-column: 1 / -1; }
  .footer-nav h4 { margin-bottom: 12px; font-size: 15px; }
  .footer-nav li { margin-bottom: 8px; font-size: 13px; }
  .float-bar { display: none; }
  .mobile-bar { display: grid; }
  body { padding-bottom: 52px; }
  .page-banner { padding: 44px 16px; }
  .news-panel.on { gap: 20px; }
  .news-panel.on > * { min-width: 0; }
  .news-top img { height: 200px; }
  .err-page .code { font-size: 80px; }
  .center.mt20 { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }
  .center.mt20 .btn { white-space: normal; padding: 10px 24px; font-size: 14px; }
  .jd-grid { grid-template-columns: 1fr; }
  .jd-detail { grid-template-columns: 1fr; }
  .jd-stats .container { gap: 30px; flex-wrap: wrap; }
  .jd-stats .num { font-size: 22px; }
  .wenda-wrap { grid-template-columns: 1fr; }
  .wenda-side { position: static; }
  .wenda-item { flex-direction: column; gap: 12px; }
  .wenda-status { width: fit-content; }
  .wenda-answer { padding-left: 0; border-left: 0; text-align: left; display: flex; align-items: center; gap: 8px; }
  .wenda-answer .answer-count { font-size: 18px; }
  .wenda-stats .container { gap: 30px; flex-wrap: wrap; }
  .wenda-stats .num { font-size: 22px; }
}