/* ============================================================
   政昊科技防水修缮（缮水郎）- 主样式
   品牌色系取自画册：科技蓝 → 生态绿 渐变
   ============================================================ */
:root {
  --primary: #1668b4;        /* 主蓝 */
  --primary-dark: #0d4778;   /* 深蓝 */
  --primary-light: #e8f2fa;
  --accent: #3fa650;         /* 生态绿 */
  --accent-light: #e9f6ec;
  --gradient: linear-gradient(120deg, #1668b4 0%, #1b8bc0 55%, #3fa650 100%);
  --text: #23313f;
  --muted: #5d6d7c;
  --border: #e3eaf1;
  --bg: #ffffff;
  --bg-soft: #f5f8fb;
  --card-shadow: 0 6px 24px rgba(13, 71, 120, .08);
  --radius: 12px;
  --nav-h: 76px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.75;
  font-size: 16px;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color .2s; }
ul, ol { list-style: none; }
.container { width: min(1200px, 92%); margin: 0 auto; }

/* ============ 头部导航 ============ */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  height: var(--nav-h);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 100%; gap: 20px; }
.logo-img { height: 62px; width: auto; }
.main-nav { display: flex; gap: 6px; }
.main-nav a {
  padding: 10px 18px; font-size: 16.5px; color: var(--text);
  border-radius: 8px; font-weight: 500; position: relative;
}
.main-nav a:hover { color: var(--primary); background: var(--primary-light); }
.main-nav a.active { color: #fff; background: var(--gradient); font-weight: 600; }
.nav-toggle { display: none; background: none; border: 1px solid var(--border); border-radius: 8px; font-size: 20px; padding: 8px 12px; color: var(--primary); cursor: pointer; }
.top-quick { background: var(--bg-soft); border-bottom: 1px solid var(--border); font-size: 14px; color: var(--muted); }
.top-quick-inner { display: flex; gap: 24px; padding: 8px 0; flex-wrap: wrap; }
.tq-item i { color: var(--accent); margin-right: 6px; }

/* ============ 页面横幅 ============ */
.page-banner {
  position: relative; overflow: hidden; color: #fff;
  padding: 74px 0 58px; text-align: center;
}
.page-banner::before {
  content: ""; position: absolute; inset: 0; z-index: 0;
  background: url('/assets/images/skyline.jpg') center 30% / cover no-repeat;
  opacity: .28;
}
.page-banner::after {
  content: ""; position: absolute; inset: 0; z-index: 0;
  background: linear-gradient(160deg, rgba(13,71,120,.92) 0%, rgba(22,104,180,.86) 55%, rgba(63,166,80,.82) 100%);
}
.page-banner .container { position: relative; z-index: 1; }
.page-banner h1 { font-size: 34px; letter-spacing: 2px; margin-bottom: 10px; }
.breadcrumb { font-size: 14px; opacity: .92; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb .sep { margin: 0 8px; opacity: .6; }

/* ============ 通用板块 ============ */
.section { padding: 74px 0; }
.section-soft { background: var(--bg-soft); }
.sec-head { text-align: center; margin-bottom: 46px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 12px;
  font-size: 13px; letter-spacing: 3px; color: var(--primary); font-weight: 600;
}
.eyebrow::before, .eyebrow::after {
  content: ""; width: 36px; height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary));
}
.eyebrow::after { background: linear-gradient(90deg, var(--primary), transparent); }
.sec-head h2 { font-size: 32px; margin-top: 8px; letter-spacing: 1px; }
.sec-head p.sub { color: var(--muted); margin-top: 10px; font-size: 16px; }

/* ============ Hero ============ */
.hero {
  position: relative; color: #fff; overflow: hidden;
  padding: 110px 0 96px;
  background: var(--primary-dark);
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background: url('/assets/images/hero.jpg') center / cover no-repeat;
  opacity: .9;
}
.hero::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(13,71,120,.93) 0%, rgba(13,71,120,.78) 42%, rgba(13,71,120,.22) 100%);
}
.hero .container { position: relative; z-index: 1; max-width: 760px; margin-left: max(4%, calc((100% - 1200px)/2)); }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,.14); border: 1px solid rgba(255,255,255,.35);
  border-radius: 999px; padding: 6px 16px; font-size: 14px; margin-bottom: 18px;
}
.hero h1 { font-size: 44px; line-height: 1.28; letter-spacing: 2px; margin-bottom: 14px; }
.hero h1 em { font-style: normal; color: #a8e6b8; }
.hero p.lead { font-size: 17px; opacity: .94; margin-bottom: 28px; max-width: 640px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 30px; border-radius: 999px; font-size: 16px; font-weight: 500;
  border: none; cursor: pointer; transition: transform .15s, box-shadow .2s;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--gradient); color: #fff; box-shadow: 0 8px 20px rgba(22,104,180,.35); }
.btn-ghost { background: rgba(255,255,255,.12); color: #fff; border: 1px solid rgba(255,255,255,.5); }
.btn-outline { background: #fff; color: var(--primary); border: 1px solid var(--primary); }
.hero-stats { display: flex; gap: 34px; margin-top: 40px; flex-wrap: wrap; }
.hero-stats .hs { text-align: center; }
.hero-stats .hs b { display: block; font-size: 30px; background: linear-gradient(90deg,#8fd0ff,#a8e6b8); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-stats .hs span { font-size: 13.5px; opacity: .85; }

/* ============ 信任条 ============ */
.trust-strip { background: #fff; border-bottom: 1px solid var(--border); }
.trust-strip .container { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; padding: 20px 0; }
.trust-item { display: flex; align-items: center; gap: 12px; }
.trust-item i { font-size: 26px; color: var(--accent); }
.trust-item b { display: block; font-size: 15.5px; }
.trust-item span { font-size: 13px; color: var(--muted); }

/* ============ 关于/图文 ============ */
.img-text-layout { display: grid; grid-template-columns: 460px 1fr; gap: 46px; align-items: stretch; }
.img-text-layout .it-img { display: flex; flex-direction: column; }
.img-text-layout .it-img img { border-radius: var(--radius); box-shadow: var(--card-shadow); height: 100%; min-height: 320px; object-fit: cover; }
.it-caption { display: flex; gap: 8px; align-items: center; color: var(--accent); font-size: 14px; margin-top: 10px; }
.content-body { background: #fff; }
.content-body h3 { font-size: 20px; color: var(--primary-dark); margin: 22px 0 10px; padding-left: 12px; border-left: 4px solid var(--accent); }
.content-body h3:first-of-type { margin-top: 0; }
.content-body p { color: var(--muted); margin-bottom: 12px; text-align: justify; }
.about-quals { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 20px; }
.about-quals .q { background: var(--bg-soft); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; text-align: center; }
.about-quals .q i { font-size: 24px; color: var(--primary); margin-bottom: 6px; }
.about-quals .q b { display: block; font-size: 15px; }
.about-quals .q span { font-size: 12.5px; color: var(--muted); }

/* ============ 产品卡 ============ */
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.p-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; display: flex; flex-direction: column;
  transition: transform .2s, box-shadow .2s;
}
.p-card:hover { transform: translateY(-6px); box-shadow: var(--card-shadow); }
.p-card .p-img { position: relative; background: #fff; padding: 18px; display: flex; align-items: center; justify-content: center; height: 360px; }
.p-card .p-img img { width: 100%; height: 100%; object-fit: contain; }
.p-card .p-cat {
  position: absolute; top: 12px; left: 12px; z-index: 1;
  background: var(--gradient); color: #fff; font-size: 12.5px;
  padding: 4px 12px; border-radius: 999px;
}
.p-card .p-body { padding: 20px 22px 22px; display: flex; flex-direction: column; flex: 1; }
.p-card h3 { font-size: 19px; margin-bottom: 8px; }
.p-card p { color: var(--muted); font-size: 14.5px; margin-bottom: 14px; flex: 1; }
.p-feats { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 16px; }
.p-feats span { font-size: 12px; color: var(--primary); background: var(--primary-light); padding: 3px 10px; border-radius: 999px; }
.p-card .p-link { color: var(--accent); font-size: 14.5px; font-weight: 600; margin-top: auto; }
.p-card .p-link i { transition: transform .2s; }
.p-card:hover .p-link i { transform: translateX(4px); }

/* ============ 产品分类筛选 ============ */
.cat-filter { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-bottom: 40px; }
.cat-filter a {
  padding: 8px 20px; border-radius: 999px; border: 1px solid var(--border);
  background: #fff; font-size: 14.5px; color: var(--muted);
}
.cat-filter a.active, .cat-filter a:hover { background: var(--gradient); color: #fff; border-color: transparent; }

/* ============ 产品详情 ============ */
.p-detail { display: grid; grid-template-columns: 420px 1fr; gap: 44px; align-items: start; }
.p-detail .pd-img { position: sticky; top: calc(var(--nav-h) + 24px); background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.p-detail .pd-img img { max-height: 500px; object-fit: contain; margin: 0 auto; }
.pd-info h1 { font-size: 30px; margin-bottom: 6px; }
.pd-info .pd-cat { color: var(--accent); font-size: 14px; margin-bottom: 14px; }
.pd-info .pd-intro { color: var(--muted); margin-bottom: 18px; }
.pd-params { background: var(--bg-soft); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 20px; margin-bottom: 18px; }
.pd-params li { display: flex; gap: 8px; font-size: 14.5px; padding: 3px 0; }
.pd-params li b { color: var(--primary); white-space: nowrap; }
.pd-feats { display: flex; flex-wrap: wrap; gap: 8px; }
.pd-feats span { font-size: 13px; background: var(--accent-light); color: #2c7d3d; padding: 4px 12px; border-radius: 999px; }
.pd-section { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 24px 28px; margin-top: 26px; }
.pd-section h3 { font-size: 18px; color: var(--primary-dark); margin-bottom: 12px; display: flex; align-items: center; gap: 10px; }
.pd-section h3 i { color: var(--accent); }
.pd-section p, .pd-section li { color: var(--muted); font-size: 15px; }
.pd-section ol { list-style: none; counter-reset: step; }
.pd-section ol li { counter-increment: step; position: relative; padding-left: 36px; margin-bottom: 10px; }
.pd-section ol li::before {
  content: counter(step); position: absolute; left: 0; top: 2px;
  width: 24px; height: 24px; border-radius: 50%;
  background: var(--gradient); color: #fff; font-size: 13px;
  display: flex; align-items: center; justify-content: center;
}
.pd-section .notes { background: #fff8e8; border: 1px solid #f3e3bb; border-radius: 8px; padding: 12px 16px; }

/* ============ 技术/节点图 ============ */
.tech-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.tech-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: transform .2s, box-shadow .2s; }
.tech-card:hover { transform: translateY(-4px); box-shadow: var(--card-shadow); }
.tech-card img { width: 100%; height: auto; background: #fff; }
.tech-card .tc-body { padding: 18px 22px 22px; }
.tech-card h3 { font-size: 18px; margin-bottom: 6px; }
.tech-card p { color: var(--muted); font-size: 14.5px; }
.sys-intro { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.sys-intro img { border-radius: var(--radius); box-shadow: var(--card-shadow); }
.sys-points li { display: flex; gap: 14px; margin-bottom: 18px; }
.sys-points .sp-ico {
  flex: none; width: 44px; height: 44px; border-radius: 12px;
  background: var(--gradient); color: #fff; font-size: 18px;
  display: flex; align-items: center; justify-content: center;
}
.sys-points b { display: block; font-size: 16.5px; margin-bottom: 2px; }
.sys-points span { color: var(--muted); font-size: 14.5px; }

/* ============ 新闻 ============ */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.n-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 24px 26px; display: flex; flex-direction: column; transition: transform .2s, box-shadow .2s; }
.n-card:hover { transform: translateY(-4px); box-shadow: var(--card-shadow); }
.n-meta { display: flex; gap: 12px; font-size: 12.5px; color: var(--muted); margin-bottom: 10px; }
.n-meta .n-cat { color: var(--accent); background: var(--accent-light); padding: 2px 10px; border-radius: 999px; }
.n-card h3 { font-size: 17.5px; line-height: 1.5; margin-bottom: 10px; }
.n-card p { color: var(--muted); font-size: 14px; flex: 1; }
.n-card .n-more { margin-top: 14px; color: var(--primary); font-size: 14px; font-weight: 500; }
.article-body { max-width: 860px; margin: 0 auto; background: #fff; }
.article-body h1 { font-size: 28px; line-height: 1.45; margin-bottom: 12px; }
.article-body .a-meta { color: var(--muted); font-size: 14px; padding-bottom: 18px; border-bottom: 1px solid var(--border); margin-bottom: 24px; }
.article-body .a-content p { color: #3d4c5b; margin-bottom: 16px; text-align: justify; }
.article-body .a-content ul { margin: 0 0 16px 4px; }
.article-body .a-content ul li { color: #3d4c5b; padding-left: 20px; position: relative; margin-bottom: 8px; }
.article-body .a-content ul li::before { content: "\f058"; font-family: "Font Awesome 6 Free"; font-weight: 900; color: var(--accent); position: absolute; left: 0; font-size: 14px; }
.a-back { display: inline-flex; gap: 6px; align-items: center; color: var(--primary); margin-bottom: 20px; font-size: 14.5px; }

/* ============ 联系 ============ */
.contact-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 40px; align-items: start; }
.contact-info-card { background: var(--gradient); color: #fff; border-radius: var(--radius); padding: 34px 36px; }
.contact-info-card h3 { font-size: 21px; margin-bottom: 18px; }
.contact-info-card li { display: flex; gap: 12px; margin-bottom: 16px; font-size: 15px; line-height: 1.6; }
.contact-info-card li i { flex: none; width: 36px; height: 36px; border-radius: 50%; background: rgba(255,255,255,.18); display: flex; align-items: center; justify-content: center; font-size: 15px; }
.contact-info-card li a:hover { text-decoration: underline; }
.map-section {
  background: linear-gradient(135deg, #0d4778 0%, #1668b4 100%);
  border-radius: var(--radius); min-height: 300px; position: relative;
  display: flex; align-items: center; justify-content: center; overflow: hidden;
}
.map-section::before { content: ""; position: absolute; inset: 0; background: url('/assets/images/skyline.jpg') center/cover no-repeat; opacity: .22; }
.map-overlay { position: relative; z-index: 1; padding: 40px; text-align: center; color: #fff; }
.map-overlay h3 { font-size: 20px; margin-bottom: 10px; }
.map-overlay p { opacity: .92; font-size: 15px; }
.msg-form { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 34px 36px; }
.msg-form h3 { font-size: 20px; margin-bottom: 20px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 14px; color: var(--muted); margin-bottom: 6px; }
.form-group input, .form-group textarea {
  width: 100%; border: 1px solid var(--border); border-radius: 8px;
  padding: 11px 14px; font-size: 15px; font-family: inherit; color: var(--text);
  transition: border .2s;
}
.form-group input:focus, .form-group textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-light); }
.form-group textarea { min-height: 120px; resize: vertical; }
.msg-tip { margin-top: 12px; font-size: 14.5px; min-height: 20px; }
.msg-tip.ok { color: #2c7d3d; }
.msg-tip.err { color: #c0392b; }

/* ============ CTA ============ */
.cta-band { background: var(--gradient); color: #fff; text-align: center; padding: 52px 0; }
.cta-band h2 { font-size: 27px; margin-bottom: 10px; }
.cta-band p { opacity: .92; margin-bottom: 24px; }
.cta-band .btn { background: #fff; color: var(--primary-dark); font-weight: 600; }

/* ============ FAQ ============ */
.faq-list { max-width: 880px; margin: 0 auto; }
.faq-item { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 14px; overflow: hidden; }
.faq-q {
  width: 100%; text-align: left; background: none; border: none; cursor: pointer;
  padding: 18px 24px; font-size: 16.5px; font-weight: 600; color: var(--text);
  display: flex; align-items: center; gap: 12px; font-family: inherit;
}
.faq-q i { color: var(--accent); transition: transform .2s; }
.faq-item.open .faq-q i { transform: rotate(90deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .3s ease; color: var(--muted); }
.faq-item.open .faq-a { max-height: 999px; }
.faq-a-inner { padding: 0 24px 20px 52px; font-size: 15px; }

/* ============ 页脚 ============ */
.site-footer { background: #0f2233; color: #cfdbe6; margin-top: 0; }
.footer-main { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.4fr; gap: 40px; padding: 56px 0 40px; }
.footer-logo { height: 56px; width: auto; background: #fff; border-radius: 8px; padding: 6px 10px; margin-bottom: 16px; }
.footer-intro { font-size: 14px; color: #93a6b7; margin-bottom: 18px; }
.footer-quals { display: flex; flex-wrap: wrap; gap: 10px; }
.footer-quals span { font-size: 12.5px; border: 1px solid #2c4763; border-radius: 999px; padding: 4px 12px; color: #9fd3f0; }
.footer-quals span i { margin-right: 5px; color: var(--accent); }
.footer-col h4 { color: #fff; font-size: 16.5px; margin-bottom: 18px; }
.footer-col h4 i { color: var(--accent); margin-right: 8px; }
.footer-col ul li { margin-bottom: 10px; font-size: 14px; }
.footer-col ul a { color: #a9bccd; }
.footer-col ul a:hover { color: #fff; }
.footer-contact li { color: #a9bccd; display: flex; gap: 10px; }
.footer-contact li i { flex: none; margin-top: 4px; color: var(--accent); }
.footer-bottom { border-top: 1px solid #22374b; padding: 18px 0; font-size: 13.5px; color: #7f93a6; }
.footer-bottom-inner { display: flex; justify-content: center; gap: 18px; flex-wrap: wrap; }
.footer-bottom a:hover { color: #fff; }

/* ============ 回到顶部 ============ */
#backTop {
  position: fixed; right: 26px; bottom: 30px; z-index: 90;
  width: 44px; height: 44px; border-radius: 50%; border: none; cursor: pointer;
  background: var(--gradient); color: #fff; font-size: 17px;
  opacity: 0; pointer-events: none; transition: opacity .3s;
  box-shadow: 0 8px 18px rgba(13,71,120,.3);
}
#backTop.show { opacity: 1; pointer-events: auto; }

/* ============ 动效 ============ */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .product-grid, .news-grid { grid-template-columns: repeat(2, 1fr); }
  .img-text-layout, .p-detail, .contact-grid, .sys-intro { grid-template-columns: 1fr; }
  .p-detail .pd-img { position: static; }
  .tech-grid { grid-template-columns: 1fr; }
  .footer-main { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 700px) {
  /* 导航 */
  .main-nav {
    display: none; position: absolute; top: var(--nav-h); left: 0; right: 0;
    background: #fff; border-bottom: 1px solid var(--border);
    flex-direction: column; padding: 10px 4%;
    box-shadow: 0 14px 26px rgba(13,71,120,.10);
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 16px; font-size: 16px; }
  .nav-toggle { display: block; }
  .logo-img { height: 48px; }

  /* Hero 收紧，标题缩小防挤压 */
  .hero { padding: 54px 0 46px; }
  .hero .container { margin: 0 auto; width: 92%; }
  .hero-badge { font-size: 12.5px; padding: 5px 13px; margin-bottom: 14px; }
  .hero h1 { font-size: 25px; line-height: 1.42; letter-spacing: 1px; margin-bottom: 12px; }
  .hero p.lead { font-size: 14.5px; margin-bottom: 22px; }
  .hero-actions { gap: 10px; }
  .btn { padding: 11px 22px; font-size: 15px; }
  .hero-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 16px 10px; margin-top: 26px; }
  .hero-stats .hs { text-align: left; }
  .hero-stats .hs b { font-size: 22px; }
  .hero-stats .hs span { font-size: 12px; }

  /* 板块与信任条 */
  .section { padding: 46px 0; }
  .sec-head { margin-bottom: 30px; }
  .sec-head h2 { font-size: 23px; }
  .sec-head p.sub { font-size: 14px; }
  .page-banner { padding: 52px 0 40px; }
  .page-banner h1 { font-size: 24px; }
  .trust-strip .container { grid-template-columns: 1fr 1fr; gap: 14px 10px; padding: 16px 0; }
  .trust-item i { font-size: 22px; }
  .trust-item b { font-size: 14px; }
  .trust-item span { font-size: 12px; }
  .product-grid, .news-grid { grid-template-columns: 1fr; gap: 18px; }
  .p-card .p-img { height: 300px; padding: 14px; }
  .about-quals, .about-quals[style] { grid-template-columns: 1fr 1fr !important; gap: 10px; }
  .about-quals .q { padding: 13px 10px; }
  .about-quals .q b { font-size: 14px; }
  .about-quals .q span { font-size: 11.5px; }
  .form-row { grid-template-columns: 1fr; }
  .contact-info-card, .msg-form { padding: 24px 22px; }
  .cta-band { padding: 34px 0; }
  .cta-band h2 { font-size: 21px; }
  .cta-band p { font-size: 14px; }
  .sys-points b { font-size: 15.5px; }
  .faq-q { font-size: 15.5px; padding: 15px 18px; }
  .faq-a-inner { padding: 0 18px 16px 46px; font-size: 14px; }

  /* 页脚：品牌整行 + 导航/产品两列 + 联系整行，压缩竖向高度 */
  .footer-main { grid-template-columns: 1fr 1fr; gap: 22px 16px; padding: 30px 0 20px; }
  .footer-col.footer-brand { grid-column: 1 / -1; }
  .footer-logo { height: 46px; margin-bottom: 12px; }
  .footer-quals { gap: 7px; }
  .footer-quals span { font-size: 11.5px; padding: 3px 10px; }
  /* 资质徽章在手机端隐藏（首页信任条已展示，避免重复且压缩高度） */
  .footer-quals span:nth-child(n+3) { display: none; }
  .footer-intro {
    font-size: 12.5px; line-height: 1.6; margin-bottom: 10px;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
  }
  .footer-col h4 { font-size: 14.5px; margin-bottom: 8px; }
  .footer-col ul li { margin-bottom: 5px; font-size: 13px; }
  .footer-lead { display: none; }
  .footer-col.footer-contact-col { grid-column: 1 / -1; }
  .footer-contact li { font-size: 13px; margin-bottom: 8px; }
  .footer-bottom { padding: 12px 0; }
  .footer-bottom-inner { flex-direction: column; align-items: center; gap: 4px; text-align: center; font-size: 12px; line-height: 1.65; }

  /* 回到顶部按钮贴边距小 */
  #backTop { right: 14px; bottom: 16px; width: 40px; height: 40px; font-size: 15px; }
}