/* ==========================================================================
   Laboratory Analytical Instruments — 主样式表
   设计目标：专业 B2B 工业风 / 移动优先 / 零外部字体依赖（保证海外访问速度）
   ========================================================================== */

/* ------------------------------ 变量 ------------------------------ */
:root {
  --c-primary: #0b4f8a;
  --c-primary-dark: #083a66;
  --c-primary-light: #e8f1f9;
  --c-accent: #0891b2;
  --c-wa: #25d366;
  --c-wa-dark: #1da851;

  --c-ink: #0f172a;
  --c-body: #334155;
  --c-muted: #64748b;
  --c-line: #e2e8f0;
  --c-bg: #ffffff;
  --c-bg-muted: #f6f8fb;
  --c-bg-dark: #0d1b2a;

  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 18px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06), 0 1px 3px rgba(15, 23, 42, 0.05);
  --shadow: 0 4px 12px rgba(15, 23, 42, 0.07), 0 1px 3px rgba(15, 23, 42, 0.05);
  --shadow-lg: 0 18px 40px rgba(11, 79, 138, 0.14);
  --wrap: 1200px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
}

/* ------------------------------ 基础 ------------------------------ */
*,
*::before,
*::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  color: var(--c-body);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--c-primary); text-decoration: none; }
a:hover { color: var(--c-primary-dark); }
h1, h2, h3, h4 { color: var(--c-ink); line-height: 1.25; margin: 0 0 .6em; font-weight: 700; }
h1 { font-size: clamp(1.75rem, 1.2rem + 2.2vw, 2.9rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.4rem, 1.1rem + 1.2vw, 2rem); letter-spacing: -0.01em; }
h3 { font-size: 1.125rem; }
p { margin: 0 0 1em; }
ul, ol { margin: 0 0 1em; padding-left: 1.2em; }
button { font: inherit; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }
.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: -9999px; top: 0; background: var(--c-primary);
  color: #fff; padding: 10px 16px; z-index: 999;
}
.skip-link:focus { left: 0; }
.hp-field { position: absolute !important; left: -9999px !important; opacity: 0; }
.ico { flex: none; }

/* ------------------------------ 按钮 ------------------------------ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 20px; border-radius: 999px; border: 1px solid transparent;
  font-weight: 600; font-size: .95rem; cursor: pointer; white-space: nowrap;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease, color .15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-sm { padding: 8px 15px; font-size: .875rem; }
.btn-lg { padding: 14px 26px; font-size: 1rem; }
.btn-primary { background: var(--c-primary); color: #fff; box-shadow: var(--shadow-sm); }
.btn-primary:hover { background: var(--c-primary-dark); color: #fff; box-shadow: var(--shadow); }
.btn-wa { background: var(--c-wa); color: #fff; box-shadow: 0 4px 12px rgba(37, 211, 102, .3); }
.btn-wa:hover { background: var(--c-wa-dark); color: #fff; }
.btn-outline { border-color: var(--c-line); background: #fff; color: var(--c-ink); }
.btn-outline:hover { border-color: var(--c-primary); color: var(--c-primary); }
.btn-ghost-light { border-color: rgba(255, 255, 255, .5); color: #fff; }
.btn-ghost-light:hover { background: rgba(255, 255, 255, .12); color: #fff; }

.link-arrow, .link-wa {
  display: inline-flex; align-items: center; gap: 6px;
  font-weight: 600; font-size: .9rem;
}
.link-wa { color: var(--c-wa-dark); }
.link-wa:hover { color: var(--c-wa-dark); }

/* ------------------------------ 顶栏 + 导航 ------------------------------ */
.site-header { position: sticky; top: 0; z-index: 100; background: #fff; }
.topbar {
  background: var(--c-bg-dark); color: #c7d4e2; font-size: .8125rem;
}
.topbar-in { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 36px; }
.topbar-item { display: inline-flex; align-items: center; gap: 6px; color: #c7d4e2; }
a.topbar-item:hover { color: #fff; }
.topbar-right { display: flex; align-items: center; gap: 18px; }

.header-in {
  display: flex; align-items: center; justify-content: space-between;
  gap: 20px; min-height: 74px;
  border-bottom: 1px solid var(--c-line);
}
.brand { display: inline-flex; align-items: center; gap: 11px; flex: none; }
.brand-mark {
  display: grid; place-items: center; width: 42px; height: 42px; border-radius: 11px;
  background: linear-gradient(140deg, var(--c-primary), var(--c-accent)); color: #fff;
  box-shadow: 0 6px 14px rgba(11, 79, 138, .25);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-text strong {
  font-size: 1.0625rem; color: var(--c-ink); letter-spacing: -0.01em;
  max-width: 280px;
}
.brand-text em { font-style: normal; font-size: .6875rem; color: var(--c-muted); letter-spacing: .04em; text-transform: uppercase; }
.brand-light .brand-text strong { color: #fff; }
.brand-light .brand-text em { color: #8fa6bd; text-transform: none; letter-spacing: 0; font-size: .75rem; }

.nav-list { display: flex; align-items: center; gap: 4px; list-style: none; margin: 0; padding: 0; }
.nav-item { position: relative; }
.nav-link {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 9px 13px; border-radius: var(--radius-sm);
  font-size: .9375rem; font-weight: 600; color: var(--c-body);
}
.nav-link:hover { color: var(--c-primary); background: var(--c-primary-light); }
.nav-item.is-active > .nav-link { color: var(--c-primary); background: var(--c-primary-light); }
.chev { transition: transform .2s ease; }
.has-dropdown:hover .chev { transform: rotate(180deg); }

.dropdown {
  position: absolute; top: calc(100% + 8px); left: 0; min-width: 300px;
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius);
  box-shadow: var(--shadow-lg); padding: 8px; margin: 0; list-style: none;
  opacity: 0; visibility: hidden; transform: translateY(-6px);
  transition: opacity .18s ease, transform .18s ease, visibility .18s;
  z-index: 60;
}
.has-dropdown:hover .dropdown,
.has-dropdown:focus-within .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown a {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 9px 12px; border-radius: var(--radius-sm); color: var(--c-body); font-size: .9rem;
}
.dropdown a:hover { background: var(--c-primary-light); color: var(--c-primary); }
.dd-name { font-weight: 600; }
.dd-tag { font-size: .75rem; color: var(--c-muted); background: var(--c-bg-muted); padding: 2px 8px; border-radius: 999px; }

/* ---- 二级下拉：精度大类 -> 系列 ---- */
.dropdown li.dd-group { position: relative; }
.dd-group-name {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 9px 12px; border-radius: var(--radius-sm);
  color: var(--c-body); font-size: .9rem; font-weight: 600; cursor: pointer;
}
.dd-group-name .chev { transform: rotate(-90deg); }
.dd-group:hover .dd-group-name,
.dd-group:focus-within .dd-group-name { background: var(--c-primary-light); color: var(--c-primary); }
.submenu {
  position: absolute; top: -8px; left: calc(100% + 6px); min-width: 280px;
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius);
  box-shadow: var(--shadow-lg); padding: 8px; margin: 0; list-style: none;
  opacity: 0; visibility: hidden; transform: translateX(-6px);
  transition: opacity .18s ease, transform .18s ease, visibility .18s;
  z-index: 70;
}
.dd-group:hover .submenu,
.dd-group:focus-within .submenu { opacity: 1; visibility: visible; transform: translateX(0); }
.submenu a {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 9px 12px; border-radius: var(--radius-sm); color: var(--c-body); font-size: .9rem;
}
.submenu a:hover { background: var(--c-primary-light); color: var(--c-primary); }

.nav-extra { display: flex; align-items: center; gap: 12px; }
.lang-switch { display: inline-flex; border: 1px solid var(--c-line); border-radius: 999px; overflow: hidden; }
.lang-item { padding: 6px 13px; font-size: .8125rem; font-weight: 600; color: var(--c-muted); }
.lang-item.is-active { background: var(--c-primary); color: #fff; }

.nav-toggle, .nav-burger { display: none; }

/* ------------------------------ 区块 ------------------------------ */
.section { padding: 72px 0; }
.section-muted { background: var(--c-bg-muted); }
.section-tight { padding: 48px 0; }
.section-head { max-width: 780px; margin: 0 0 40px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.eyebrow {
  display: inline-block; font-size: .75rem; font-weight: 700; letter-spacing: .12em;
  text-transform: uppercase; color: var(--c-accent); margin-bottom: 12px;
}
.lead { font-size: 1.0625rem; color: var(--c-muted); }

.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

.card {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius);
  overflow: hidden; transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: #cbd9e6; }

/* ------------------------------ 面包屑 ------------------------------ */
.breadcrumbs { background: var(--c-bg-muted); border-bottom: 1px solid var(--c-line); }
.breadcrumbs ol {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
  list-style: none; margin: 0; padding: 11px 0; font-size: .8125rem; color: var(--c-muted);
}
.breadcrumbs li + li::before { content: "/"; margin-right: 8px; color: #c3cedb; }
.breadcrumbs a { color: var(--c-muted); }
.breadcrumbs a:hover { color: var(--c-primary); }

/* ------------------------------ 首页 Hero ------------------------------ */
.hero {
  position: relative; overflow: hidden; color: #fff;
  background:
    radial-gradient(1000px 500px at 12% 0%, rgba(8, 145, 178, .38), transparent 60%),
    radial-gradient(800px 460px at 92% 20%, rgba(37, 99, 235, .32), transparent 62%),
    linear-gradient(150deg, #0d1b2a 0%, #0b3f6e 55%, #0b4f8a 100%);
}
.hero::after {
  content: ""; position: absolute; inset: 0;
  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: 48px 48px; mask-image: linear-gradient(to bottom, #000, transparent 78%);
  pointer-events: none;
}
.hero-in {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center;
  padding: 76px 0 84px;
}
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 8px; padding: 6px 14px;
  border: 1px solid rgba(255, 255, 255, .28); border-radius: 999px;
  background: rgba(255, 255, 255, .1); font-size: .8125rem; font-weight: 600;
  color: #dbeafe; margin-bottom: 20px;
}
.hero h1 { color: #fff; margin-bottom: 18px; }
.hero-text { font-size: 1.0625rem; color: #c9dcee; max-width: 60ch; margin-bottom: 26px; }
.hero-points { list-style: none; padding: 0; margin: 0 0 30px; display: grid; gap: 10px; }
.hero-points li { display: flex; gap: 10px; align-items: flex-start; color: #e2eef8; font-size: .9375rem; }
.hero-points .ico { color: #4ade80; margin-top: 3px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }

.hero-panel {
  background: rgba(255, 255, 255, .07); border: 1px solid rgba(255, 255, 255, .18);
  border-radius: var(--radius-lg); padding: 26px; backdrop-filter: blur(6px);
}
.hero-panel h2 { color: #fff; font-size: 1.125rem; margin-bottom: 16px; }
.hero-panel .check-list li { color: #dbeafe; }
.hero-panel .check-list .ico { color: #4ade80; }
.hero-quick { display: grid; gap: 10px; margin-top: 20px; padding-top: 20px; border-top: 1px solid rgba(255, 255, 255, .16); }
.hero-quick a {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 10px 14px; border-radius: var(--radius-sm); background: rgba(255, 255, 255, .08);
  color: #e8f3fb; font-size: .9rem; font-weight: 600;
}
.hero-quick a:hover { background: rgba(255, 255, 255, .16); color: #fff; }

/* ------------------------------ 数据条 ------------------------------ */
.stat-bar { background: var(--c-primary-dark); color: #fff; }
.stat-bar-in { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; padding: 26px 0; }
.stat { text-align: center; }
.stat .v { display: block; font-size: 1.75rem; font-weight: 800; color: #fff; line-height: 1.15; }
.stat .l { font-size: .8125rem; color: #a9c6de; }

/* ------------------------------ 列表样式 ------------------------------ */
.check-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.check-list li { display: flex; gap: 10px; align-items: flex-start; font-size: .9375rem; }
.check-list .ico { color: var(--c-accent); margin-top: 3px; }

.feature-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.feature-list li {
  display: flex; gap: 11px; align-items: flex-start;
  padding-bottom: 12px; border-bottom: 1px dashed var(--c-line); font-size: .9375rem;
}
.feature-list li:last-child { border-bottom: 0; padding-bottom: 0; }
.feature-list .ico { color: var(--c-wa-dark); margin-top: 2px; }

/* ------------------------------ 产品卡片 ------------------------------ */
.product-media, .cat-media {
  display: block; background: linear-gradient(160deg, #eef4fa, #f8fbfe); border-bottom: 1px solid var(--c-line);
}
.product-media img, .cat-media img { width: 100%; aspect-ratio: 3 / 2; object-fit: contain; padding: 18px; }
.product-body { padding: 18px 20px 20px; }
.product-model {
  display: inline-block; font-size: .75rem; font-weight: 700; letter-spacing: .06em;
  color: var(--c-primary); background: var(--c-primary-light); padding: 3px 10px;
  border-radius: 999px; margin: 0 0 10px;
}
.product-body h3 { font-size: 1.0625rem; margin-bottom: 8px; }
.product-body h3 a { color: var(--c-ink); }
.product-body h3 a:hover { color: var(--c-primary); }
.product-short { font-size: .875rem; color: var(--c-muted); margin-bottom: 16px; }
.product-actions { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }

.cat-card { display: flex; flex-direction: column; color: inherit; }
.cat-card:hover { color: inherit; }
.cat-body { padding: 20px 22px 22px; display: flex; flex-direction: column; flex: 1; }
.cat-tagline { font-size: .8125rem; font-weight: 700; color: var(--c-accent); margin: 0 0 10px; }
.cat-intro { font-size: .875rem; color: var(--c-muted); flex: 1; }
.cat-card .link-arrow { margin-top: 6px; }

/* ------------------------------ 为什么选我们 / 流程 ------------------------------ */
.why-card { padding: 26px 24px; }
.why-icon {
  display: grid; place-items: center; width: 46px; height: 46px; border-radius: 12px;
  background: var(--c-primary-light); color: var(--c-primary); margin-bottom: 16px;
}
.why-card h3 { font-size: 1.0625rem; margin-bottom: 8px; }
.why-card p { font-size: .9rem; color: var(--c-muted); margin: 0; }

.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 20px; counter-reset: s; }
.step { position: relative; padding: 24px 22px; background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); }
.step .num {
  display: inline-block; font-size: .8125rem; font-weight: 800; letter-spacing: .08em;
  color: #fff; background: var(--c-primary); border-radius: 6px; padding: 3px 9px; margin-bottom: 12px;
}
.step h3 { font-size: 1rem; margin-bottom: 6px; }
.step p { font-size: .875rem; color: var(--c-muted); margin: 0; }

/* ------------------------------ 应用领域 ------------------------------ */
.app-card { padding: 24px; display: flex; gap: 16px; }
.app-icon {
  flex: none; display: grid; place-items: center; width: 46px; height: 46px;
  border-radius: 12px; background: linear-gradient(140deg, var(--c-primary), var(--c-accent)); color: #fff;
}
.app-card h3 { font-size: 1.0625rem; margin-bottom: 8px; }
.app-card p { font-size: .9rem; color: var(--c-muted); margin-bottom: 14px; }
.app-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.app-tag { font-size: .75rem; color: var(--c-primary); background: var(--c-primary-light); padding: 3px 9px; border-radius: 999px; }

/* ------------------------------ 表格 ------------------------------ */
.table-scroll { overflow-x: auto; border: 1px solid var(--c-line); border-radius: var(--radius); }
.spec-table { width: 100%; border-collapse: collapse; font-size: .9rem; min-width: 480px; }
.spec-table th, .spec-table td { padding: 12px 18px; text-align: left; border-bottom: 1px solid var(--c-line); }
.spec-table tbody tr:last-child th, .spec-table tbody tr:last-child td { border-bottom: 0; }
.spec-table th { width: 38%; font-weight: 600; color: var(--c-ink); background: var(--c-bg-muted); }
.spec-table tbody tr:hover td, .spec-table tbody tr:hover th { background: #fbfdff; }

/* ------------------------------ FAQ ------------------------------ */
.faq-list { display: grid; gap: 12px; max-width: 900px; }
.faq-item { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); overflow: hidden; }
.faq-item summary {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 17px 22px; cursor: pointer; font-weight: 600; color: var(--c-ink);
  list-style: none; font-size: .9688rem;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { background: var(--c-bg-muted); }
.faq-chev { color: var(--c-muted); transition: transform .2s ease; }
.faq-item[open] .faq-chev { transform: rotate(180deg); }
.faq-answer { padding: 0 22px 18px; font-size: .9375rem; color: var(--c-body); }
.faq-answer p { margin: 0; }

/* ------------------------------ CTA 条 ------------------------------ */
.cta-band { background: linear-gradient(120deg, var(--c-primary-dark), var(--c-primary) 55%, var(--c-accent)); color: #fff; }
.cta-band-in { display: flex; align-items: center; justify-content: space-between; gap: 32px; padding: 46px 0; flex-wrap: wrap; }
.cta-band h2 { color: #fff; margin-bottom: 8px; }
.cta-band p { color: #d3e6f5; margin: 0; max-width: 62ch; }
.cta-band-actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* ------------------------------ 询盘表单 ------------------------------ */
.inquiry-form { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-lg); padding: 28px; box-shadow: var(--shadow); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field { display: block; }
.field-full { grid-column: 1 / -1; }
.field-label { display: block; font-size: .875rem; font-weight: 600; color: var(--c-ink); margin-bottom: 7px; }
.field-label i { color: #dc2626; font-style: normal; }
.field input, .field select, .field textarea {
  width: 100%; padding: 11px 14px; font: inherit; font-size: .9375rem; color: var(--c-ink);
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-sm);
  transition: border-color .15s ease, box-shadow .15s ease;
}
.field textarea { resize: vertical; min-height: 120px; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--c-primary); box-shadow: 0 0 0 3px rgba(11, 79, 138, .12);
}
.field.has-error input, .field.has-error textarea { border-color: #dc2626; }
.field-err { display: block; margin-top: 6px; font-size: .8125rem; font-style: normal; color: #dc2626; }
.consent { display: flex; gap: 10px; align-items: flex-start; margin: 20px 0 4px; font-size: .875rem; }
.consent input { margin-top: 4px; flex: none; width: 16px; height: 16px; }
.consent small { display: block; color: var(--c-muted); font-size: .8125rem; margin-top: 2px; }
.form-actions { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-top: 20px; }
.form-or { color: var(--c-muted); font-size: .875rem; }
.form-result { margin-top: 18px; padding: 14px 18px; border-radius: var(--radius-sm); font-size: .9375rem; }
.form-result.is-ok { background: #ecfdf5; border: 1px solid #a7f3d0; color: #065f46; }
.form-result.is-err { background: #fef2f2; border: 1px solid #fecaca; color: #991b1b; }
.form-notice { padding: 12px 16px; border-radius: var(--radius-sm); background: #fffbeb; border: 1px solid #fde68a; color: #92400e; font-size: .9rem; margin-bottom: 18px; }

/* ------------------------------ 联系信息块 ------------------------------ */
.contact-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 32px; align-items: start; }
.contact-cards { display: grid; gap: 14px; }
.contact-card { display: flex; gap: 14px; padding: 18px 20px; background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); }
.contact-card .ci { flex: none; display: grid; place-items: center; width: 42px; height: 42px; border-radius: 11px; background: var(--c-primary-light); color: var(--c-primary); }
.contact-card h3 { font-size: .8125rem; text-transform: uppercase; letter-spacing: .07em; color: var(--c-muted); margin: 0 0 4px; font-weight: 700; }
.contact-card p, .contact-card a { font-size: .95rem; color: var(--c-ink); font-weight: 600; margin: 0; word-break: break-word; }
.contact-card a:hover { color: var(--c-primary); }
.contact-aside { background: var(--c-bg-muted); border: 1px solid var(--c-line); border-radius: var(--radius-lg); padding: 26px; }
.contact-aside h3 { font-size: 1.0625rem; }
.response-note { display: flex; gap: 9px; align-items: center; font-size: .875rem; color: var(--c-wa-dark); font-weight: 600; margin-top: 18px; }

/* ------------------------------ 产品详情 ------------------------------ */
.product-hero { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: start; }
.product-figure {
  background: linear-gradient(160deg, #eef4fa, #f8fbfe); border: 1px solid var(--c-line);
  border-radius: var(--radius-lg); padding: 32px;
}
.product-figure img { width: 100%; aspect-ratio: 3 / 2; object-fit: contain; }
.product-summary h1 { margin-bottom: 10px; }
.product-model-lg {
  display: inline-block; font-size: .8125rem; font-weight: 700; letter-spacing: .08em;
  color: #fff; background: var(--c-primary); padding: 4px 12px; border-radius: 999px; margin-bottom: 16px; margin-right: 8px;
}
.sensor-badge { background: var(--c-accent); letter-spacing: .14em; }
.product-lead { font-size: 1.0625rem; color: var(--c-muted); }
.product-cta { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }
.product-points { margin-top: 24px; padding-top: 22px; border-top: 1px solid var(--c-line); }

.split-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; align-items: start; }
.panel { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-lg); padding: 26px 28px; }
.panel h2 { font-size: 1.25rem; }
.panel-muted { background: var(--c-bg-muted); }

.pill-row { display: flex; flex-wrap: wrap; gap: 8px; }
.pill { font-size: .8125rem; padding: 5px 12px; border-radius: 999px; background: var(--c-primary-light); color: var(--c-primary); font-weight: 600; }

/* ------------------------------ 页脚 ------------------------------ */
.site-footer { background: var(--c-bg-dark); color: #9fb3c8; margin-top: 0; }
.footer-grid {
  display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 36px; padding: 58px 20px 42px;
}
.footer-col h3 {
  color: #fff; font-size: .8125rem; text-transform: uppercase; letter-spacing: .1em; margin-bottom: 16px; font-weight: 700;
}
.footer-desc { font-size: .875rem; color: #9fb3c8; margin: 18px 0 20px; max-width: 42ch; }
.footer-links, .footer-contact { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; font-size: .875rem; }
.footer-links a, .footer-contact a { color: #9fb3c8; }
.footer-links a:hover, .footer-contact a:hover { color: #fff; }
.footer-contact li { display: flex; gap: 9px; align-items: flex-start; }
.footer-contact .ico { color: #4a7ea8; margin-top: 3px; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, .1); }
.footer-bottom-in {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 18px 20px; font-size: .8125rem; color: #7d8fa3; flex-wrap: wrap;
}
.footer-bottom p { margin: 0; }
.footer-legal { display: flex; gap: 16px; flex-wrap: wrap; }
.footer-legal a { color: #7d8fa3; }
.footer-legal a:hover { color: #fff; }

/* ------------------------------ 悬浮转化 ------------------------------ */
.float-stack { position: fixed; right: 20px; bottom: 88px; z-index: 90; display: grid; gap: 10px; }
.float-btn {
  position: relative; display: grid; place-items: center;
  width: 54px; height: 54px; border-radius: 50%; color: #fff;
  box-shadow: 0 8px 22px rgba(15, 23, 42, .22); transition: transform .16s ease;
}
.float-btn:hover { transform: scale(1.06); color: #fff; }
.float-wa { background: var(--c-wa); }
.float-wa::after {
  content: ""; position: absolute; inset: 0; border-radius: 50%;
  border: 2px solid var(--c-wa); animation: wa-pulse 2.4s ease-out infinite;
}
@keyframes wa-pulse {
  0% { transform: scale(1); opacity: .7; }
  100% { transform: scale(1.55); opacity: 0; }
}
.float-top { background: rgba(13, 27, 42, .82); width: 44px; height: 44px; margin-left: 10px; }
.float-top .ico { transform: rotate(-90deg); }
.float-tip {
  position: absolute; right: calc(100% + 12px); top: 50%; transform: translateY(-50%);
  background: var(--c-ink); color: #fff; font-size: .8125rem; font-weight: 600;
  padding: 8px 13px; border-radius: 8px; white-space: nowrap; opacity: 0; pointer-events: none;
  transition: opacity .16s ease;
}
.float-tip::after {
  content: ""; position: absolute; left: 100%; top: 50%; transform: translateY(-50%);
  border: 6px solid transparent; border-left-color: var(--c-ink);
}
.float-wa:hover .float-tip { opacity: 1; }

.mobile-bar-wa {
  display: none; position: fixed; left: 0; right: 0; bottom: 0; z-index: 95;
  align-items: center; justify-content: center; gap: 8px;
  background: var(--c-wa); color: #fff; font-weight: 700; padding: 14px; font-size: 1rem;
  box-shadow: 0 -4px 16px rgba(15, 23, 42, .14);
}

/* ------------------------------ 页面头 ------------------------------ */
.page-head { background: linear-gradient(150deg, #0d1b2a, #0b3f6e 70%, #0b4f8a); color: #fff; padding: 48px 0 52px; }
.page-head h1 { color: #fff; margin-bottom: 12px; }
.page-head p { color: #c3d9ec; max-width: 76ch; margin: 0; font-size: 1.0625rem; }

/* ------------------------------ 扫码咨询 ------------------------------ */
.qr-panel { margin-top: 18px; padding: 18px; border: 1px solid var(--c-line); border-radius: var(--radius); background: var(--c-bg-muted); }
.qr-panel h3 { font-size: 1rem; margin-bottom: 14px; }
.qr-row { display: flex; gap: 18px; }
.qr-item { flex: 1; margin: 0; text-align: center; }
.qr-item img { display: block; width: 100%; max-width: 150px; height: auto; margin: 0 auto; padding: 6px; background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-sm); }
.qr-item figcaption { margin-top: 8px; font-size: .8125rem; font-weight: 500; color: var(--c-ink); }
.qr-note { margin: 12px 0 0; font-size: .8125rem; color: var(--c-muted); }
.qr-link { margin: 8px 0 0; font-size: .8125rem; }

@media (max-width: 520px) {
  .qr-row { gap: 12px; }
  .qr-item img { max-width: 128px; }
}

/* ------------------------------ 响应式 ------------------------------ */
@media (max-width: 1080px) {
  .brand-text strong { max-width: 220px; font-size: .9375rem; }
  .nav-link { padding: 9px 10px; font-size: .875rem; }
}

@media (max-width: 960px) {
  .hero-in { grid-template-columns: 1fr; gap: 34px; padding: 54px 0 60px; }
  .contact-grid, .product-hero, .split-2 { grid-template-columns: 1fr; gap: 28px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
  .stat-bar-in { grid-template-columns: repeat(2, 1fr); }
  .cta-band-in { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 860px) {
  .nav-burger {
    display: grid; place-items: center; width: 42px; height: 42px; border-radius: 10px;
    border: 1px solid var(--c-line); color: var(--c-ink); cursor: pointer;
  }
  .main-nav {
    position: fixed; inset: 0 0 0 auto; width: min(88vw, 380px); background: #fff;
    box-shadow: -12px 0 34px rgba(15, 23, 42, .16); padding: 22px 20px 90px;
    overflow-y: auto; transform: translateX(105%); transition: transform .26s ease; z-index: 120;
  }
  .nav-toggle:checked ~ .main-nav { transform: translateX(0); }
  .nav-list { flex-direction: column; align-items: stretch; gap: 2px; }
  .nav-link { justify-content: space-between; padding: 13px 12px; font-size: 1rem; }
  .dropdown {
    position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none;
    border: 0; border-left: 2px solid var(--c-line); border-radius: 0; padding: 0 0 6px 12px;
    min-width: 0; margin-left: 12px;
  }
  .dropdown a { padding: 8px 10px; }
  .dd-group-name { padding: 8px 10px; }
  .submenu {
    position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none;
    border: 0; border-left: 2px solid var(--c-line); border-radius: 0; padding: 0 0 6px 12px;
    min-width: 0; margin-left: 12px;
  }
  .submenu a { padding: 8px 10px; }
  .nav-extra { flex-direction: column; align-items: stretch; gap: 14px; margin-top: 22px; }
  .lang-switch { align-self: flex-start; }
  .float-stack { bottom: 76px; right: 14px; }
  .float-top { display: none; }
  .mobile-bar-wa { display: flex; }
  body { padding-bottom: 54px; }
  .section { padding: 52px 0; }
  .topbar-right .hide-sm { display: none; }
  .inquiry-form { padding: 22px 18px; }
  .form-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; padding: 44px 20px 30px; }
  .footer-bottom-in { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 520px) {
  .wrap { padding: 0 16px; }
  .brand-mark { width: 38px; height: 38px; }
  .brand-text strong { font-size: .8125rem; max-width: 190px; }
  .brand-text em { font-size: .625rem; }
  .stat .v { font-size: 1.4rem; }
  .float-tip { display: none; }
  .card:hover { transform: none; }
}

@media print {
  .site-header, .float-stack, .mobile-bar-wa, .cta-band, .inquiry-form { display: none; }
}

/* ===================== 产品矩阵（精度 x 结构） ===================== */
.mx-wrap{overflow-x:auto;border:1px solid var(--c-line);border-radius:12px;background:#fff}
.mx{width:100%;border-collapse:collapse;min-width:560px;font-size:.9375rem}
.mx th,.mx td{border-top:1px solid var(--c-line);border-left:1px solid var(--c-line);padding:.7rem .9rem;text-align:center;vertical-align:middle}
.mx thead th{background:#F1EFE8;font-weight:500;border-top:0}
.mx thead th:first-child,.mx tbody th{text-align:left}
.mx tbody th.mx-label{background:#FAFAF7;font-weight:500;width:230px}
.mx tbody tr:first-child th,.mx tbody tr:first-child td{border-top:0}
.mx tbody tr th:first-child,.mx tbody tr td:first-child{border-left:0}
.mx-link{font-weight:500;text-decoration:underline;text-underline-offset:3px}
.mx-empty{color:var(--c-muted)}
.mx-chips{display:flex;flex-wrap:wrap;gap:8px}
.mx-chip{border:1px solid var(--c-line);border-radius:999px;padding:.3rem .85rem;font-size:.875rem;white-space:nowrap}
.mx-chip:hover{border-color:#0891b2;color:#0891b2}
.mx-note{color:var(--c-muted);font-size:.875rem;margin-top:14px}

/* ===================== 机型卡片 / 图库 / 参数矩阵 ===================== */
.model-card .model-media{display:flex;align-items:center;justify-content:center;overflow:hidden;border-radius:10px 10px 0 0;background:#fff;aspect-ratio:4/3}
.model-card .model-media img{width:100%;height:100%;object-fit:contain;display:block;transition:transform .35s ease}
.model-card:hover .model-media img{transform:scale(1.04)}
.model-code{font-size:.8125rem;font-weight:700;letter-spacing:1.6px;color:var(--c-accent,#0891b2);text-transform:uppercase;margin-bottom:2px}
.model-cap{font-size:.875rem;color:var(--c-muted);margin-bottom:8px}
.mx-params th,.mx-params td{white-space:nowrap}
.mx-params .mx-label{font-weight:600}
.gallery-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px}
.gallery-item{margin:0;background:#fff;border:1px solid var(--c-line);border-radius:12px;overflow:hidden}
.gallery-item img{width:100%;height:auto;display:block}
.gallery-item figcaption{padding:10px 14px;font-size:.875rem;color:var(--c-muted);border-top:1px solid var(--c-line)}