@charset "UTF-8";
/* ============================================================
 * 北京金澳科技 · 全站共用样式
 * 阶段一：index.html 使用；阶段二其余 5 个页面继续复用本文件
 * 主色 #0B4F9E / 点缀 #FF7A00 / 圆角 12px / 思源黑体栈
 * ============================================================ */

:root {
  --blue: #0B4F9E;
  --blue-deep: #073A77;
  --blue-dark: #082C58;
  --blue-soft: #EAF2FC;
  --orange: #FF7A00;
  --orange-deep: #E46B00;
  --ink: #1B2430;
  --muted: #5B6775;
  --faint: #8A97A8;
  --line: #E4EAF2;
  --bg: #FFFFFF;
  --bg-tint: #F5F8FC;
  --radius: 12px;
  --shadow: 0 8px 28px rgba(11, 79, 158, 0.08);
  --container: 1200px;
  --font: "Noto Sans SC", "Source Han Sans SC", "思源黑体", "PingFang SC",
          "Microsoft YaHei", "微软雅黑", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
img { height: auto; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, h4, p { margin: 0; }
button { font: inherit; }
[hidden] { display: none !important; }

:focus-visible { outline: 3px solid var(--orange); outline-offset: 3px; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: 16px; top: -60px; z-index: 200;
  padding: 10px 18px; border-radius: 8px; background: var(--orange); color: #fff;
}
.skip-link:focus { top: 12px; }

.container { width: min(calc(100% - 40px), var(--container)); margin-inline: auto; }

/* ---------------- 按钮 ---------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 24px; border: 2px solid transparent; border-radius: 10px;
  font-size: 15px; font-weight: 700; white-space: nowrap; cursor: pointer;
  transition: transform .18s ease, background .18s ease, color .18s ease,
              border-color .18s ease, box-shadow .18s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: var(--orange); color: #fff;
  box-shadow: 0 8px 20px rgba(255, 122, 0, .26);
}
.btn-primary:hover { background: var(--orange-deep); }
.btn-ghost { border-color: rgba(255, 255, 255, .65); color: #fff; background: rgba(255, 255, 255, .06); }
.btn-ghost:hover { background: rgba(255, 255, 255, .16); }
.btn-outline { border-color: var(--blue); color: var(--blue); background: transparent; }
.btn-outline:hover { background: var(--blue); color: #fff; }
.btn-lg { padding: 15px 32px; font-size: 16px; }
.btn-sm { padding: 9px 18px; font-size: 14px; }

/* ---------------- 顶部条 / 导航 ---------------- */
.topbar { background: var(--blue-dark); color: rgba(255, 255, 255, .8); font-size: 13px; }
.topbar .container {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; min-height: 36px;
}
.topbar-tel { color: #fff; font-weight: 700; }
.topbar-right { display: flex; gap: 20px; }

.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .97);
  border-bottom: 1px solid var(--line);
  transition: box-shadow .2s ease;
}
.site-header.is-scrolled { box-shadow: 0 6px 20px rgba(11, 79, 158, .10); }
.header-inner { position: relative; display: flex; align-items: center; gap: 24px; min-height: 76px; }

.brand { display: inline-flex; align-items: center; gap: 12px; flex: 0 0 auto; }
.brand-mark {
  position: relative; width: 44px; height: 44px; border-radius: 10px;
  background: var(--blue); color: #fff; display: grid; place-items: center;
  font-size: 19px; font-weight: 900; letter-spacing: -.5px;
}
.brand-mark::after {
  content: ""; position: absolute; right: -3px; top: -3px;
  width: 10px; height: 10px; border-radius: 50%; background: var(--orange);
}
.brand-text strong { display: block; font-size: 20px; letter-spacing: .06em; color: var(--blue-deep); line-height: 1.2; }
.brand-text small { display: block; font-size: 10px; letter-spacing: .16em; color: var(--faint); }

.main-nav { margin-left: auto; }
.main-nav ul { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  display: block; padding: 10px 14px; border-radius: 8px;
  font-size: 15px; font-weight: 500; transition: color .2s, background .2s;
}
.main-nav a:hover { color: var(--blue); background: var(--blue-soft); }
.main-nav a.is-active { color: var(--blue); font-weight: 700; }
.main-nav a.is-active::after {
  content: ""; display: block; width: 18px; height: 3px; margin: 4px auto 0;
  border-radius: 2px; background: var(--orange);
}
.main-nav .nav-cta { display: none; }

.header-actions { display: flex; align-items: center; gap: 14px; }
.header-tel { display: inline-flex; align-items: center; gap: 7px; font-weight: 700; color: var(--blue-deep); white-space: nowrap; }
.header-tel svg { width: 17px; height: 17px; }

.nav-toggle {
  display: none; margin-left: auto; width: 44px; height: 44px;
  flex-direction: column; align-items: center; justify-content: center; gap: 5px;
  border: 1px solid var(--line); border-radius: 10px; background: #fff; cursor: pointer;
}
.nav-toggle span {
  display: block; width: 22px; height: 2px; border-radius: 2px;
  background: var(--blue-deep); transition: transform .2s, opacity .2s;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------------- Banner / Hero（左文右图拼贴） ---------------- */
.hero {
  position: relative; overflow: hidden; color: #fff;
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(255, 122, 0, .20) 0%, rgba(255, 122, 0, 0) 42%),
    linear-gradient(118deg, #06264F 0%, #0B4F9E 55%, #0E63C4 100%);
}
.hero-deco { position: absolute; inset: 0; z-index: 0; pointer-events: none; }
.hero-deco svg { width: 100%; height: 100%; display: block; }
.hero-inner {
  position: relative; z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  grid-template-areas:
    "head   head"
    "visual side"
    "below  below";
  align-items: stretch;
  column-gap: 34px; row-gap: 28px;
  padding: 72px 0 80px;
}
.hero-head, .hero-visual, .hero-side, .hero-below { min-width: 0; }
.hero-head { grid-area: head; }
.hero-visual { grid-area: visual; }
.hero-side {
  grid-area: side; display: flex; flex-direction: column;
  justify-content: center; gap: 14px;
}
.hero-below {
  grid-area: below; border-top: 1px solid rgba(255, 255, 255, .16);
  padding-top: 24px;
}
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px; margin-bottom: 18px;
  padding-left: 12px; border-left: 3px solid var(--orange);
  font-size: 14px; letter-spacing: .1em; color: #C6DEF8;
}
.hero-head h1 {
  position: relative; padding-left: 22px; margin: 0;
  font-size: clamp(30px, 4.15vw, 52px); line-height: 1.18; font-weight: 900; letter-spacing: .01em;
}
.hero-head h1::before {
  content: ""; position: absolute; left: 0; top: 6px; bottom: 6px; width: 6px;
  background: var(--orange); border-radius: 4px;
}
.hero-head h1 .accent { color: var(--orange); }
.hero-sub { margin: 0; max-width: 1000px; font-size: clamp(15px, 1.4vw, 18px); color: rgba(255, 255, 255, .88); line-height: 1.7; }
.hero-scenes { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0 0; padding: 0; }
.hero-scenes li {
  list-style: none; font-size: 13px; padding: 5px 12px; border-radius: 999px;
  background: rgba(255, 255, 255, .10); border: 1px solid rgba(255, 255, 255, .18); color: #E4F1FF;
}
.hero-points { display: flex; flex-direction: column; align-items: flex-start; gap: 12px; margin: 0; padding: 0; }
.hero-points li {
  list-style: none; display: inline-flex; align-items: center; gap: 8px;
  font-size: 15px; font-weight: 600; color: #fff;
  padding: 9px 16px; border-radius: 999px;
  border: 1.5px solid rgba(120, 180, 255, .55); background: rgba(255, 255, 255, .04);
}
.hero-points .tick {
  width: 20px; height: 20px; border-radius: 50%; flex: 0 0 auto;
  display: inline-flex; align-items: center; justify-content: center;
  background: rgba(46, 204, 113, .18); color: #38D39F;
}
.hero-points .tick svg { width: 13px; height: 13px; }
.hero-side .btn { width: 100%; }
.hero-side .btn-ghost { color: #fff; border-color: rgba(255, 255, 255, .5); background: transparent; }
.hero-side .btn-ghost:hover { background: rgba(255, 255, 255, .10); border-color: #fff; }
.hero-phone { font-size: 15px; white-space: nowrap; }
.hero-phone svg { width: 20px; height: 20px; flex: 0 0 20px; }
.hero-side .hero-points li { width: 100%; justify-content: center; }

/* 右侧主视觉：单张燃气报警器安装场地实景大图 */
.hero-visual { position: relative; }
.hero-visual::before {
  content: ""; position: absolute; inset: -10px -10px 10px 10px;
  border: 1px solid rgba(255, 255, 255, .18); border-radius: 20px;
  background: rgba(255, 122, 0, .10); z-index: 0;
}
.hero-shot {
  position: relative; z-index: 1; margin: 0;
  border-radius: 16px; overflow: hidden; background: #06264F;
  box-shadow: 0 26px 60px rgba(0, 0, 0, .42);
  border: 1px solid rgba(255, 255, 255, .22);
}
.hero-shot img { display: block; width: 100%; height: 300px; object-fit: cover; }
/* ---------------- 区块通用 ---------------- */
.section { padding: 88px 0; }
.section-tint { background: var(--bg-tint); }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; margin-bottom: 40px; }
.section-head .kicker { font-size: 13px; font-weight: 700; letter-spacing: .14em; color: var(--orange); }
.section-head h2 { margin-top: 8px; font-size: clamp(26px, 2.6vw, 36px); font-weight: 800; line-height: 1.3; color: var(--blue-deep); }
.section-head p { margin-top: 10px; max-width: 660px; font-size: 15px; color: var(--muted); }
.head-link { color: var(--blue); font-weight: 700; white-space: nowrap; }
.head-link:hover { color: var(--orange); }

.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow);
  transition: transform .22s ease, box-shadow .22s ease;
}
.card:hover { transform: translateY(-6px); box-shadow: 0 16px 36px rgba(11, 79, 158, .14); }

/* ---------------- 产品分类（4） ---------------- */
.product-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 24px; }
.product-card:not(.product-feature) > img { width: 100%; aspect-ratio: 3 / 2; object-fit: contain; background: #fff; padding: 12px; }
.product-card .body { padding: 22px 22px 12px; }
.product-card h3 { font-size: 18px; line-height: 1.45; color: var(--blue-deep); }
.product-card p { margin-top: 10px; min-height: 72px; font-size: 14px; color: var(--muted); }
.product-card .card-foot {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 22px 20px; font-size: 13px;
}
.product-card .idx { font-weight: 800; letter-spacing: .1em; color: #B9C6D6; }
.card-more { color: var(--blue); font-weight: 700; }

/* 民用燃气报警器与燃气紧急切断阀：通栏特色卡（宽幅示意图 + 文案） */
.product-feature {
  grid-column: 1 / -1; display: grid;
  grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr); align-items: stretch;
}
.product-feature > img { width: 100%; height: 100%; min-height: 280px; aspect-ratio: auto; object-fit: cover; }
.product-feature .body { padding: 30px 34px; display: flex; flex-direction: column; justify-content: center; }
.product-feature .feature-tag {
  display: inline-flex; align-self: flex-start; margin-bottom: 12px;
  padding: 5px 12px; border-radius: 999px; font-size: 12px; font-weight: 700;
  color: var(--orange); background: rgba(255, 122, 0, .10);
}
.product-feature h3 { font-size: clamp(20px, 2vw, 25px); }
.product-feature p { min-height: 0; margin-top: 12px; font-size: 14.5px; line-height: 1.85; }
.product-feature .card-foot { padding: 0; margin-top: 18px; }
.card-more:hover { color: var(--orange); }

/* ---------------- 四大核心业务 ---------------- */
.business-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 26px; }
.biz-card { display: flex; flex-direction: column; transition: transform .25s ease, box-shadow .25s ease; }
.biz-card:hover { transform: translateY(-4px); }
.biz-card > img { width: 100%; aspect-ratio: 760 / 507; object-fit: cover; }
.biz-card .body { padding: 24px 24px 26px; flex: 1 1 auto; display: flex; flex-direction: column; }
.biz-no {
  display: inline-block; font-size: 13px; font-weight: 800; letter-spacing: .12em;
  color: var(--orange); margin-bottom: 6px;
}
.biz-card h3 { font-size: 20px; line-height: 1.4; color: var(--blue-deep); }
.biz-card p { margin-top: 12px; font-size: 14.5px; line-height: 1.75; color: var(--muted); }
.biz-card p strong { color: var(--blue-deep); }
.biz-card .card-more { margin-top: 16px; }

/* ---------------- 核心优势（6） ---------------- */
.advantage-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.advantage-item {
  padding: 30px 28px; background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow);
  transition: transform .22s ease, box-shadow .22s ease;
}
.advantage-item:hover { transform: translateY(-4px); box-shadow: 0 16px 36px rgba(11, 79, 158, .13); }
.advantage-icon {
  width: 52px; height: 52px; margin-bottom: 20px; border-radius: 12px;
  background: var(--blue-soft); color: var(--blue); display: grid; place-items: center;
}
.advantage-icon svg { width: 28px; height: 28px; }
.advantage-item h3 { font-size: 18px; color: var(--blue-deep); }
.advantage-item p { margin-top: 10px; font-size: 14px; color: var(--muted); }

/* ---------------- 客户案例（3） ---------------- */
.case-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.case-card > img { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; }
.case-card .body { padding: 22px; }
.tag {
  display: inline-flex; align-items: center; padding: 4px 12px; border-radius: 999px;
  background: var(--blue-soft); color: var(--blue); font-size: 12px; font-weight: 700;
}
.case-card h3 { margin-top: 12px; font-size: 18px; line-height: 1.45; color: var(--blue-deep); }
.case-card p { margin-top: 10px; font-size: 14px; color: var(--muted); }
.case-card .card-foot { padding: 0 22px 22px; }

/* ---------------- 最新动态 ---------------- */
.news-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.news-card-media { position: relative; display: block; }
.news-card-media img { width: 100%; aspect-ratio: 400 / 260; object-fit: cover; }
.tag-float { position: absolute; left: 16px; top: 16px; background: var(--orange); color: #fff; }
.news-card-body { padding: 22px; }
.news-card-body time { font-size: 13px; color: var(--faint); }
.news-card-body h3 { margin-top: 8px; font-size: 18px; line-height: 1.45; color: var(--blue-deep); }
.news-card-body h3 a:hover { color: var(--orange); }
.news-card-body p {
  margin-top: 10px; font-size: 14px; color: var(--muted);
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}
.link-more { display: inline-flex; gap: 6px; margin-top: 16px; color: var(--blue); font-size: 14px; font-weight: 700; }
.link-more:hover { color: var(--orange); }

/* 只有 1 条新闻 → 横向大卡 */
.news-grid.is-single { grid-template-columns: minmax(0, 1fr); }
.news-grid.is-single .news-card { display: grid; grid-template-columns: 380px minmax(0, 1fr); }
.news-grid.is-single .news-card-media { height: 100%; }
.news-grid.is-single .news-card-media img { height: 100%; aspect-ratio: auto; }
.news-grid.is-single .news-card-body { display: flex; flex-direction: column; justify-content: center; padding: 32px 40px; }
.news-grid.is-single .news-card-body h3 { font-size: 24px; }
.news-grid.is-single .news-card-body p { -webkit-line-clamp: 4; }
.demo-note { margin-top: 20px; font-size: 13px; color: var(--faint); }

/* ---------------- 资质认证 ---------------- */
.cert-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px; max-width: 940px; margin: 0 auto; }
.cert-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); overflow: hidden;
}
.cert-img-wrap {
  background: #F2F6FB; border-bottom: 1px solid var(--line);
  display: grid; place-items: center; padding: 20px;
}
.cert-img-wrap img {
  width: 100%; max-width: 340px; border: 1px solid #E2E8F0; border-radius: 6px;
  box-shadow: 0 8px 22px rgba(11, 79, 158, .12); background: #fff;
}
.cert-body { padding: 20px 24px 24px; }
.cert-body h3 { font-size: 17px; line-height: 1.4; color: var(--blue-deep); }
.cert-body p { margin-top: 8px; font-size: 13.5px; color: var(--muted); }
.cert-meta { margin-top: 12px; font-size: 12.5px; color: var(--faint); letter-spacing: .02em; }

/* ---------------- 底部 CTA ---------------- */
.cta-band { padding: 64px 0; background: linear-gradient(110deg, var(--blue-dark), var(--blue)); color: #fff; }
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 30px; flex-wrap: wrap; }
.cta-band h2 { font-size: clamp(24px, 2.4vw, 32px); font-weight: 800; }
.cta-band p { margin-top: 10px; color: rgba(255, 255, 255, .82); }
.cta-actions { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.cta-tel { font-size: 26px; font-weight: 800; line-height: 1.3; }
.cta-tel small { display: block; font-size: 13px; font-weight: 400; color: rgba(255, 255, 255, .75); }

/* ---------------- 页脚（全站统一，后续页面复用此结构） ---------------- */
.site-footer { padding: 64px 0 0; background: var(--blue-dark); color: rgba(255, 255, 255, .76); }
.footer-grid { display: grid; grid-template-columns: 1.9fr 1fr 1fr 1.2fr; gap: 36px; }
.site-footer h3 { margin-bottom: 18px; color: #fff; font-size: 16px; }
.site-footer p { font-size: 14px; }
.site-footer .footer-intro { font-size: 13px; line-height: 1.9; color: rgba(255, 255, 255, .72); text-align: justify; }
.site-footer .footer-intro + .footer-intro { margin-top: 12px; }
.site-footer a:hover { color: var(--orange); }
.footer-list li { margin-bottom: 10px; font-size: 14px; }
.footer-contact li { display: flex; gap: 10px; margin-bottom: 12px; font-size: 14px; }
.footer-contact svg { flex: 0 0 17px; width: 17px; height: 17px; margin-top: 4px; }
.footer-bottom {
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
  margin-top: 48px; padding: 20px 0; border-top: 1px solid rgba(255, 255, 255, .14);
  font-size: 13px; color: rgba(255, 255, 255, .58);
}
.icp { color: rgba(255, 255, 255, .58); }

/* ============================================================
 * 内页通用（阶段二：产品 / 关于 / 案例 / 新闻 / 联系）
 * ============================================================ */

/* 内页 banner（深蓝，呼应首页 Hero） */
.page-hero {
  position: relative; color: #fff; overflow: hidden;
  background:
    radial-gradient(120% 120% at 90% -20%, rgba(255, 122, 0, .18) 0%, rgba(255, 122, 0, 0) 45%),
    linear-gradient(118deg, #06264F 0%, #0B4F9E 60%, #0E63C4 100%);
}
.page-hero::after {
  content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .05) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: linear-gradient(90deg, #000, transparent 70%);
}
.page-hero .container { position: relative; z-index: 1; padding: 70px 0 60px; }
.crumb { font-size: 13px; color: rgba(255, 255, 255, .72); margin-bottom: 16px; letter-spacing: .02em; }
.crumb a { color: rgba(255, 255, 255, .72); }
.crumb a:hover { color: #fff; }
.crumb i { margin: 0 9px; font-style: normal; opacity: .5; }
.page-hero h1 { font-size: clamp(28px, 3.4vw, 44px); font-weight: 900; line-height: 1.2; letter-spacing: .01em; }
.page-hero h1 .accent { color: var(--orange); }
.page-hero p { margin-top: 14px; max-width: 740px; font-size: 15.5px; color: rgba(255, 255, 255, .85); line-height: 1.7; }

/* 内页通用双栏：左正文 + 右配图（关于我们、案例详情用） */
.split { display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items: center; }
.split.reverse { grid-template-columns: .85fr 1.15fr; }
.split-media { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); border: 1px solid var(--line); }
.split-media img { width: 100%; height: 100%; object-fit: cover; }
.prose h2 { font-size: clamp(24px, 2.4vw, 32px); color: var(--blue-deep); font-weight: 800; line-height: 1.3; }
.prose h3 { margin-top: 30px; font-size: 20px; color: var(--blue-deep); }
.prose p { margin-top: 14px; font-size: 15.5px; color: var(--muted); line-height: 1.85; }
.prose p strong { color: var(--blue-deep); }
.prose ul.lead-list { margin-top: 18px; }
.prose ul.lead-list li {
  position: relative; padding-left: 28px; margin-top: 12px; font-size: 15px; color: var(--ink); line-height: 1.7;
}
.prose ul.lead-list li::before {
  content: ""; position: absolute; left: 4px; top: 10px; width: 9px; height: 9px;
  border-radius: 50%; background: var(--orange);
}
.stat-row { display: flex; flex-wrap: wrap; gap: 28px; margin-top: 26px; }
.stat-row .stat { flex: 1 1 140px; }
.stat .num { font-size: 34px; font-weight: 900; color: var(--blue); line-height: 1; }
.stat .num .u { font-size: 16px; color: var(--orange); margin-left: 3px; }
.stat .label { margin-top: 8px; font-size: 13.5px; color: var(--muted); }

/* 产品分类分组标题 */
.cat-head { display: flex; align-items: baseline; gap: 14px; margin: 8px 0 28px; }
.cat-head h3 { font-size: 22px; color: var(--blue-deep); font-weight: 800; }
.cat-head .cat-desc { font-size: 14px; color: var(--muted); }
.cat-block + .cat-block { margin-top: 56px; }

/* 时间轴（关于我们·发展历程） */
.timeline { position: relative; margin-top: 16px; padding-left: 26px; }
.timeline::before {
  content: ""; position: absolute; left: 4px; top: 6px; bottom: 6px; width: 2px; background: var(--line);
}
.tl-item { position: relative; padding: 0 0 30px 22px; }
.tl-item::before {
  content: ""; position: absolute; left: -26px; top: 4px; width: 12px; height: 12px;
  border-radius: 50%; background: #fff; border: 3px solid var(--orange);
}
.tl-item .year { font-size: 18px; font-weight: 800; color: var(--blue); }
.tl-item h4 { margin-top: 4px; font-size: 16px; color: var(--blue-deep); }
.tl-item p { margin-top: 6px; font-size: 14px; color: var(--muted); }

/* 新闻三栏（新闻资讯页） */
.news-cols { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 30px; }
.news-col { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
.news-col-head {
  display: flex; align-items: center; gap: 10px; padding: 18px 22px;
  background: var(--blue-soft); border-bottom: 1px solid var(--line);
}
.news-col-head .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--orange); }
.news-col-head h3 { font-size: 17px; color: var(--blue-deep); font-weight: 800; }
.news-col-list { padding: 8px 22px 20px; }
.news-col-item { display: block; padding: 16px 0; border-bottom: 1px dashed var(--line); }
.news-col-item:last-child { border-bottom: 0; }
.news-col-item time { font-size: 12.5px; color: var(--faint); }
.news-col-item h4 { margin-top: 6px; font-size: 15.5px; line-height: 1.5; color: var(--ink); font-weight: 600; transition: color .2s; }
.news-col-item:hover h4 { color: var(--orange); }
.news-col-empty { padding: 26px 22px; font-size: 14px; color: var(--faint); }

/* 新闻详情 */
.article { max-width: 820px; margin: 0 auto; }
.article-header { margin-bottom: 26px; }
.article-header .tag { margin-bottom: 14px; }
.article-header h1 { font-size: clamp(24px, 2.6vw, 34px); color: var(--blue-deep); font-weight: 800; line-height: 1.35; }
.article-meta { margin-top: 14px; font-size: 13.5px; color: var(--faint); display: flex; gap: 18px; flex-wrap: wrap; }
.article-cover { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); margin-bottom: 28px; border: 1px solid var(--line); }
.article-cover img { width: 100%; }
.article-body { font-size: 16px; color: var(--ink); line-height: 1.95; }
.article-body p { margin-top: 18px; }
.article-body h3 { margin-top: 30px; font-size: 20px; color: var(--blue-deep); }
.article-body ul { margin-top: 16px; padding-left: 22px; list-style: disc; }
.article-body ul li { margin-top: 10px; color: var(--muted); }
.article-back { margin-top: 36px; }

/* 地图占位 */
.map-wrap {
  position: relative; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--line); box-shadow: var(--shadow); background: var(--bg-tint);
  min-height: 320px; display: grid; place-items: center;
}
.map-wrap img { width: 100%; height: 100%; object-fit: cover; opacity: .9; }
.map-placeholder {
  position: absolute; inset: 0; display: grid; place-items: center; text-align: center;
  background: repeating-linear-gradient(45deg, #EAF2FC, #EAF2FC 22px, #E1ECFA 22px, #E1ECFA 44px);
  color: var(--faint);
}
.map-placeholder strong { display: block; font-size: 18px; color: var(--blue); margin-bottom: 8px; }
.map-placeholder span { font-size: 14px; }

/* 联系信息卡 */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; align-items: start; }
.contact-info { display: grid; gap: 18px; }
.contact-card {
  display: flex; gap: 16px; padding: 22px; background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow);
}
.contact-card .ic {
  flex: 0 0 46px; width: 46px; height: 46px; border-radius: 12px; background: var(--blue-soft);
  color: var(--blue); display: grid; place-items: center;
}
.contact-card .ic svg { width: 24px; height: 24px; }
.contact-card h3 { font-size: 16px; color: var(--blue-deep); }
.contact-card p { margin-top: 6px; font-size: 14.5px; color: var(--muted); line-height: 1.6; }
.contact-card a { color: var(--blue); font-weight: 700; }

/* 留言表单 */
.form-card { padding: 30px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.form-card h3 { font-size: 19px; color: var(--blue-deep); margin-bottom: 6px; }
.form-card .form-tip { font-size: 13.5px; color: var(--faint); margin-bottom: 20px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 14px; font-weight: 600; color: var(--ink); margin-bottom: 8px; }
.field label .req { color: var(--orange); margin-left: 3px; }
.field input, .field textarea, .field select {
  width: 100%; padding: 12px 14px; font: inherit; font-size: 15px; color: var(--ink);
  border: 1.5px solid var(--line); border-radius: 10px; background: #fff; transition: border-color .2s, box-shadow .2s;
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px rgba(11, 79, 158, .12);
}
.field textarea { min-height: 130px; resize: vertical; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-note { font-size: 13px; color: var(--faint); margin-top: 6px; }

/* ---------------- 轻提示 ---------------- */
.toast {
  position: fixed; left: 50%; bottom: 28px; z-index: 100;
  transform: translate(-50%, 16px); opacity: 0; pointer-events: none;
  width: max-content; max-width: min(calc(100% - 32px), 560px);
  padding: 14px 22px; border-radius: 10px; background: var(--blue-dark); color: #fff;
  font-size: 14px; box-shadow: 0 12px 32px rgba(0, 0, 0, .22);
  transition: opacity .25s ease, transform .25s ease;
}
.toast.is-visible { opacity: 1; transform: translate(-50%, 0); }

/* ============================================================
 * 响应式
 * ============================================================ */
@media (max-width: 1100px) {
  .header-tel { display: none; }
  .product-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 991px) {
  .section { padding: 64px 0; }
  .nav-toggle { display: inline-flex; }
  .header-actions { display: none; }
  .main-nav {
    display: none; position: absolute; top: 100%; left: -20px; right: -20px;
    margin: 0; background: #fff; border-top: 1px solid var(--line);
    box-shadow: 0 18px 30px rgba(11, 79, 158, .12);
    max-height: calc(100dvh - 76px); overflow-y: auto;
  }
  .main-nav.is-open { display: block; }
  .main-nav ul { display: block; padding: 8px 20px 16px; }
  .main-nav a { padding: 13px 8px; border-bottom: 1px solid var(--line); border-radius: 0; }
  .main-nav a.is-active::after { display: none; }
  .main-nav .nav-cta { display: flex; margin: 0 20px 20px; }
  body.nav-open { overflow: hidden; }

  .advantage-grid, .case-grid, .news-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .news-cols { grid-template-columns: 1fr; gap: 22px; }
  .split, .split.reverse { grid-template-columns: 1fr; gap: 28px; }
  .contact-grid { grid-template-columns: 1fr; gap: 28px; }
  .hero-inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    grid-template-areas: "head head" "visual side" "below below";
    column-gap: 20px; row-gap: 22px; padding: 56px 0;
  }
  .hero-visual { max-width: none; }
  .hero-shot img { height: auto; aspect-ratio: 2278 / 1280; }
  .hero-side { gap: 10px; }
  .hero-points { flex-direction: column; flex-wrap: nowrap; gap: 10px; }
  .hero-side .hero-points li { width: 100%; justify-content: center; font-size: 14px; padding: 8px 12px; }
  .hero-side .btn { width: 100%; font-size: 14px; padding: 12px 14px; }
  .hero-sub { font-size: 14px; }
}

@media (max-width: 767px) {
  .topbar-right { display: none; }
  .topbar .container { justify-content: center; min-height: 32px; }
  .header-inner { min-height: 68px; }
  .main-nav { max-height: calc(100dvh - 68px); }
  .brand-text strong { font-size: 18px; }
  .hero-head h1 { font-size: clamp(28px, 7.5vw, 40px); padding-left: 18px; }
  .hero-visual::before { inset: -8px -8px 8px 8px; }
  .product-feature { grid-template-columns: 1fr; }
  .product-feature > img { min-height: 0; height: auto; aspect-ratio: 3 / 2; }
  .product-feature .body { padding: 24px; }
  .hero-scenes li, .hero-points li { font-size: 13px; }
  .hero-points { gap: 8px; }
  .section { padding: 48px 0; }
  .section-head { flex-direction: column; align-items: flex-start; gap: 12px; margin-bottom: 28px; }
  .product-grid, .advantage-grid, .case-grid, .news-grid,
  .business-grid, .cert-grid, .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .product-card p { min-height: 0; }
  .field-row { grid-template-columns: minmax(0, 1fr); }
  .news-grid.is-single .news-card { grid-template-columns: minmax(0, 1fr); }
  .news-grid.is-single .news-card-media img { height: auto; aspect-ratio: 400 / 260; }
  .news-grid.is-single .news-card-body { padding: 22px; }
  .news-grid.is-single .news-card-body h3 { font-size: 19px; }
  .cta-inner { flex-direction: column; align-items: flex-start; }
  .cta-tel { font-size: 24px; }
  .footer-bottom { flex-direction: column; }
}

@media (max-width: 640px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas: "head" "visual" "side" "below";
    column-gap: 0; row-gap: 22px; padding: 52px 0;
  }
  .hero-visual { max-width: 560px; }
  .hero-shot img { height: 220px; aspect-ratio: auto; }
  .hero-side { gap: 12px; }
  .hero-side .hero-points li { width: auto; justify-content: flex-start; }
  .hero-side .btn { width: auto; align-self: flex-start; font-size: 15px; padding: 15px 24px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}