/* =========================================================
   ZHENTANZHE 海外 B2B 独立站 · 全站唯一样式表（模板基准）
   ----------------------------------------------------------
   结构：令牌 → 基础重置 → 无障碍 → 布局 → 按钮 → 顶部导航
   → 语言下拉 → 面包屑 → Hero → 卡片网格 → 表格 → 徽章
   → 安全提示 → FAQ → 表单 → CTA → 页脚 → 返回顶部
   → 博客正文 .prose → 工具类 → 响应式(900px/600px) → 打印
   规则：
   1. 自包含：无外部字体、无外部样式、无图片资源依赖；
   2. 工业 B2B 风：圆角 ≤12px、阴影克制，禁渐变紫/毛玻璃/大圆角；
   3. 对比度 ≥4.5:1：#ff7a1a 在深蓝底只用于大标题/图标/边框/按钮底色，
      浅底上的橙色系文字一律用 --orange-ink(#b34d00)，绿色文字用 --green-ink；
   4. 子目录页引用路径（HTML 侧改动，本文件不变）：
      根页        <link rel="stylesheet" href="assets/css/style.css">
      二级目录页  href="../assets/css/style.css"    （如 products/gf-8010.html）
      语言三级页  href="../../assets/css/style.css" （如 zh/products/gf-8010.html）
   ========================================================= */

/* ---------- 1. 设计令牌 ---------- */
:root {
  /* 品牌色 */
  --navy: #0e2a4d;
  --navy-deep: #0b2344;      /* 页脚深一档 */
  --blue: #1d4a82;
  --orange: #ff7a1a;
  --green: #27ae60;
  --bg: #f4f6fa;
  --surface: #ffffff;
  --text: #1f2d3d;
  --border: #e1e7ef;
  --muted: #6b7a8d;          /* 仅装饰/边框/分隔符，不作浅底小字正文 */
  --muted-ink: #56677a;      /* 浅底次级正文（对 --bg 与白底均 ≥4.5:1） */

  /* 派生色：为满足 4.5:1 而加深的同族色 */
  --orange-ink: #b34d00;     /* 浅底上的橙色文字/图标 */
  --warn-ink: #7a3b06;       /* 安全提示正文 */
  --green-ink: #1a6f3d;      /* 浅底上的绿色文字 */
  --danger: #b3261e;
  --danger-soft: #fdf3f2;
  --focus: #1d4a82;          /* 浅底焦点色 */
  --focus-dark: #ffa352;     /* 深底（导航/Hero/页脚）焦点色 */

  /* 低饱和底色 */
  --blue-soft: #e8eef7;
  --green-soft: #e4f4eb;
  --orange-soft: #fdeadd;
  --zebra: #f7f9fc;
  --border-strong: #c7d2e0;

  --header-h: 64px;
  --radius: 10px;
  --radius-sm: 8px;
  --shadow: 0 1px 2px rgba(14, 42, 77, .06);
  --shadow-lg: 0 10px 24px rgba(14, 42, 77, .12);
  --font: -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
}

/* ---------- 2. 基础重置 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 12px);
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-text-size-adjust: 100%;
}

h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 .6em; color: var(--navy); }
p { margin: 0 0 1em; }
img, svg { max-width: 100%; }
a { color: var(--blue); }
a:hover { color: var(--navy); }

/* lucide 内联 SVG 统一规格：24 视窗、描边继承文字颜色 */
.icon {
  width: 1.25em;
  height: 1.25em;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  vertical-align: -.22em;
  flex: none;
}

/* ---------- 3. 无障碍：skip-link 与焦点 ---------- */
.skip-link {
  position: absolute;
  left: 8px;
  top: -48px;
  z-index: 100;
  background: var(--navy);
  color: #fff;
  padding: 10px 16px;
  border-radius: 6px;
  font-weight: 700;
  text-decoration: none;
  transition: top .15s ease;
}
.skip-link:focus { top: 8px; color: #fff; }

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
  border-radius: 4px;
}
.site-header :focus-visible,
.hero :focus-visible,
.cta-band :focus-visible,
.site-footer :focus-visible { outline-color: var(--focus-dark); }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  margin: -1px; padding: 0; border: 0;
  clip: rect(0 0 0 0);
  overflow: hidden;
  white-space: nowrap;
}

/* ---------- 4. 布局容器 ---------- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}
.section { padding: 56px 0; }
.section--white { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-head { max-width: 780px; margin-bottom: 28px; }
.section-head h2 { font-size: 1.75rem; margin-bottom: 8px; }
.section-head .lede { color: var(--muted-ink); margin: 0; }
.kicker {
  display: inline-block;
  color: var(--orange-ink);
  font-size: .8125rem;
  font-weight: 800;
  letter-spacing: .1em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

/* ---------- 5. 按钮组 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font: inherit;
  font-size: .9375rem;
  font-weight: 700;
  padding: 12px 20px;
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-decoration: none;
  transition: background-color .15s ease, color .15s ease, border-color .15s ease;
}
.btn-primary { background: var(--orange); color: var(--navy); }
.btn-primary:hover { background: #e96c0d; color: var(--navy); }
.btn-outline { border-color: var(--blue); color: var(--blue); background: transparent; }
.btn-outline:hover { background: var(--blue); color: #fff; }
.btn-outline-light { border-color: rgba(255, 255, 255, .72); color: #fff; background: transparent; }
.btn-outline-light:hover { background: #fff; color: var(--navy); }
.btn-sm { padding: 8px 14px; font-size: .875rem; }
.btn-lg { padding: 14px 26px; font-size: 1rem; }
.btn-block { display: flex; width: 100%; }

/* ---------- 6. 顶部导航（sticky） ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--navy);
  color: #fff;
  box-shadow: var(--shadow);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: var(--header-h);
  position: relative;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  text-decoration: none;
  font-weight: 800;
  font-size: 1.0625rem;
  letter-spacing: .05em;
  white-space: nowrap;
}
.brand .icon { width: 26px; height: 26px; color: var(--orange); }
.header-nav { display: flex; align-items: center; flex: 1; gap: 8px; }
.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-list a {
  display: block;
  color: #fff;
  text-decoration: none;
  font-size: .9375rem;
  font-weight: 600;
  padding: 10px 11px;
  border-radius: 6px;
  white-space: nowrap;
}
.nav-list a:hover { background: rgba(255, 255, 255, .1); color: #fff; }
.nav-list a[aria-current="page"] { color: var(--orange); }
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
}

/* 汉堡按钮（仅移动端显示，见响应式区） */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, .4);
  border-radius: var(--radius-sm);
  cursor: pointer;
}
.nav-toggle .bar {
  display: block;
  width: 100%;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: transform .2s ease, opacity .2s ease;
}
.nav-toggle[aria-expanded="true"] .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- 7. 语言下拉 ---------- */
/* 桌面端：hover / 键盘焦点展开；同时支持点击开合（JS 同步 aria-expanded）。
   移动端：在汉堡面板内变为手风琴，仅由 aria-expanded 控制显隐。 */
.lang { position: relative; }
.lang-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font: inherit;
  font-size: .875rem;
  font-weight: 600;
  color: #fff;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, .4);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  cursor: pointer;
  white-space: nowrap;
}
.lang-btn:hover { background: rgba(255, 255, 255, .1); }
.lang-btn .chev { transition: transform .15s ease; }
.lang-btn[aria-expanded="true"] .chev { transform: rotate(180deg); }
.lang-menu {
  display: none;
  position: absolute;
  right: 0;
  top: calc(100% + 6px);
  min-width: 184px;
  margin: 0;
  padding: 6px;
  list-style: none;
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  z-index: 60;
}
.lang-menu a {
  display: block;
  padding: 8px 12px;
  border-radius: 6px;
  color: var(--text);
  text-decoration: none;
  font-size: .9375rem;
}
.lang-menu a:hover { background: var(--blue-soft); color: var(--navy); }
.lang-menu a[aria-current="page"] {
  background: var(--blue-soft);
  color: var(--blue);
  font-weight: 700;
}
@media (min-width: 901px) {
  .lang:hover > .lang-menu,
  .lang:focus-within > .lang-menu,
  .lang.is-open > .lang-menu { display: block; }
}
/* aria-expanded 驱动（移动端手风琴 + 桌面端点击开合共用） */
.lang-btn[aria-expanded="true"] + .lang-menu { display: block; }

/* ---------- 8. 面包屑 ---------- */
.breadcrumb { padding: 12px 0 0; }
.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: .875rem;
}
.breadcrumb li + li::before { content: "/"; color: var(--muted); margin-right: 8px; }
.breadcrumb a { color: var(--blue); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb [aria-current="page"] { color: var(--muted-ink); }

/* ---------- 9. Hero 区 ---------- */
.hero { background: var(--navy); color: #fff; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 40px;
  align-items: center;
  padding: 64px 0 48px;
}
.hero-kicker {
  color: var(--orange);
  font-size: .8125rem;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.hero h1 {
  color: #fff;
  font-size: clamp(1.8rem, 2.6vw + 1rem, 2.75rem);
  line-height: 1.15;
  margin: 12px 0 16px;
}
.hero-lede { color: #d7e0ec; line-height: 1.7; max-width: 62ch; }
.hero-lede p { margin-bottom: .9em; }
.hero-lede a { color: #fff; text-underline-offset: 3px; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 22px; }

/* Hero 数据条 */
.stat-strip { border-top: 1px solid rgba(255, 255, 255, .16); }
.stat-strip-inner { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat {
  padding: 20px 18px;
  border-left: 1px solid rgba(255, 255, 255, .12);
}
.stat:first-child { border-left: 0; padding-left: 0; }
.stat-num { font-size: 1.5rem; font-weight: 800; color: var(--orange); line-height: 1.2; }
.stat-label { color: #c7d2e0; font-size: .875rem; margin-top: 2px; }

/* ---------- 10. 页面内容图（真实照片统一样式，与 de 镜像页一致） ---------- */
.photo { display: block; width: 100%; height: auto; object-fit: cover; }
.photo-landscape { aspect-ratio: 3 / 2; }
.photo-portrait { aspect-ratio: 3 / 4; }
.photo-wide { aspect-ratio: 3 / 2; }
.photo-frame { border: 1px solid rgba(255, 255, 255, .18); }
.card > .photo { border-bottom: 1px solid var(--border); }

/* ---------- 11. 卡片与网格 ---------- */
.grid { display: grid; gap: 20px; }
.cols-2 { grid-template-columns: repeat(2, 1fr); }
.cols-3 { grid-template-columns: repeat(3, 1fr); }
.cols-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.card:hover {
  transform: translateY(-2px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-lg);
}
.card h3 { font-size: 1.0625rem; margin-bottom: 6px; }
.card p { color: var(--muted-ink); font-size: .9375rem; margin-bottom: 0; }

.icon-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--blue-soft);
  color: var(--blue);
  margin-bottom: 12px;
}
.icon-chip .icon { width: 22px; height: 22px; }
.icon-chip--orange { background: var(--orange-soft); color: var(--orange-ink); }
.icon-chip--green { background: var(--green-soft); color: var(--green-ink); }

/* 产品卡：图片通到卡片边缘 + 参数小表 */
.product-card { padding: 0; overflow: hidden; }
.product-card .card-body { padding: 18px 20px 20px; display: flex; flex-direction: column; flex: 1; }
.spec-mini {
  list-style: none;
  margin: 12px 0 0;
  padding: 12px 0 0;
  border-top: 1px dashed var(--border-strong);
  display: grid;
  gap: 6px;
  font-size: .875rem;
}
.spec-mini li { display: flex; justify-content: space-between; gap: 12px; }
.spec-mini .k { color: var(--muted-ink); }
.spec-mini .v { font-weight: 600; text-align: right; }
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 14px;
  font-weight: 700;
  font-size: .9375rem;
  color: var(--blue);
  text-decoration: none;
}
.card-link:hover { color: var(--navy); text-decoration: underline; }

/* ---------- 12. 数据表 / 对比表（全站灵魂：深蓝表头+橙线+斑马基调不变，排版细节优化） ---------- */
.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.data-table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
  font-size: .875rem;
  line-height: 1.55;
}
.data-table caption {
  caption-side: top;
  text-align: left;
  padding: 12px 16px;
  color: var(--navy);
  font-size: .875rem;
  font-weight: 600;
}
.data-table thead th {
  background: var(--navy);
  color: #fff;
  text-align: left;
  font-weight: 700;
  padding: 10px 12px;
  line-height: 1.35;
  border-bottom: 2px solid var(--orange);
}
.data-table thead th:first-child { position: sticky; left: 0; z-index: 2; }
.data-table tbody th {
  background: #eef2f8;
  color: var(--navy);
  text-align: left;
  font-weight: 600;
  padding: 10px 12px;
  vertical-align: top;
  border-top: 1px solid var(--border);
  min-width: 92px;
  position: sticky;
  left: 0;
  z-index: 1;
}
.data-table td {
  padding: 10px 12px;
  border-top: 1px solid var(--border);
  vertical-align: top;
  overflow-wrap: break-word;
}
.data-table tbody tr:nth-child(even) { background: var(--zebra); }
.data-table tbody tr:hover td { background: #f0f5fb; }
.data-table .num { font-variant-numeric: tabular-nums; }
.table-note {
  color: var(--muted-ink);
  font-size: .875rem;
  margin-top: 12px;
  max-width: 78ch;
}

/* ---------- 13. 徽章 / 标签 ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  border-radius: 6px;
  font-size: .8125rem;
  font-weight: 700;
  line-height: 1.5;
}
.badge .icon { width: 14px; height: 14px; }
.badge-blue { background: var(--blue-soft); color: var(--blue); }
.badge-green { background: var(--green-soft); color: var(--green-ink); }
.badge-orange { background: var(--orange-soft); color: var(--orange-ink); }
.badge-navy { background: var(--navy); color: #fff; }
.badge-list { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; list-style: none; }

/* ---------- 14. 安全提示条 ---------- */
.notice {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  background: var(--orange-soft);
  border: 1px solid #f3c9a8;
  border-left: 4px solid var(--orange);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  color: var(--warn-ink);
  font-size: .9375rem;
}
.notice .icon { color: var(--orange-ink); margin-top: 2px; }
.notice p { margin: 0; }
.notice strong { color: var(--warn-ink); }

/* ---------- 15. FAQ 折叠（原生 details/summary，免 JS） ---------- */
.faq-list { display: grid; gap: 12px; max-width: 860px; }
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
}
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px;
  font-weight: 700;
  color: var(--navy);
  cursor: pointer;
  list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { color: var(--blue); }
.faq-item summary .chev { transition: transform .15s ease; color: var(--muted-ink); }
.faq-item[open] summary .chev { transform: rotate(180deg); }
.faq-item .faq-a {
  padding: 0 18px 16px;
  color: var(--text);
  font-size: .9375rem;
  line-height: 1.7;
}
.faq-item .faq-a p:last-child { margin-bottom: 0; }

/* ---------- 16. 表单（RFQ） ---------- */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  max-width: 860px;
}
.form-field { display: flex; flex-direction: column; }
.form-field--full { grid-column: 1 / -1; }
.form-field label { font-weight: 700; font-size: .9375rem; margin-bottom: 6px; }
.req { color: var(--danger); }
.form-field input,
.form-field select,
.form-field textarea {
  font: inherit;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  width: 100%;
}
.form-field textarea { min-height: 120px; resize: vertical; }
.form-field input:focus-visible,
.form-field select:focus-visible,
.form-field textarea:focus-visible { border-color: var(--blue); }
.form-field input[aria-invalid="true"],
.form-field select[aria-invalid="true"],
.form-field textarea[aria-invalid="true"] {
  border-color: var(--danger);
  background: var(--danger-soft);
}
.form-hint { color: var(--muted-ink); font-size: .8125rem; margin: 4px 0 0; }
.form-error { color: var(--danger); font-size: .875rem; margin: 4px 0 0; }
.form-actions { grid-column: 1 / -1; display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.form-success {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  background: var(--green-soft);
  border: 1px solid var(--green);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  color: var(--green-ink);
  font-weight: 600;
}
.form-success .icon { margin-top: 2px; }

/* ---------- 17. CTA 横幅 ---------- */
.cta-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  background: var(--navy);
  color: #fff;
  border-radius: var(--radius);
  padding: 36px 40px;
}
.cta-band h2 { color: #fff; font-size: 1.5rem; margin: 0 0 6px; }
.cta-band p { color: #d7e0ec; margin: 0; }
.cta-band .cta-actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* ---------- 18. 页脚（多栏） ---------- */
.site-footer {
  background: var(--navy-deep);
  color: #c7d2e0;
  margin-top: 56px;
}
.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  padding: 48px 0 36px;
}
.footer-col h3 {
  color: #fff;
  font-size: .9375rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.footer-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.footer-col a { color: #c7d2e0; text-decoration: none; font-size: .9375rem; }
.footer-col a:hover { color: #fff; text-decoration: underline; }
.footer-col p { font-size: .9375rem; }
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #fff;
  font-weight: 800;
  letter-spacing: .05em;
  margin-bottom: 10px;
}
.footer-brand .icon { color: var(--orange); width: 22px; height: 22px; }
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  border-top: 1px solid rgba(255, 255, 255, .14);
  padding: 18px 0;
  font-size: .875rem;
}
.footer-safety { display: inline-flex; align-items: center; gap: 8px; }
.footer-safety .icon { color: var(--orange); width: 16px; height: 16px; }

/* ---------- 19. 返回顶部按钮 ---------- */
.back-to-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 40;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--navy);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, .25);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  cursor: pointer;
}
.back-to-top:hover { background: var(--blue); }
.back-to-top[hidden] { display: none; }

/* ---------- 20. 博客/文章排版 .prose ---------- */
.prose { max-width: 74ch; }
.prose h2 {
  font-size: 1.5rem;
  margin: 2.2em 0 .7em;
  padding-top: .2em;
}
.prose h2:first-child { margin-top: 0; }
.prose h3 { font-size: 1.125rem; margin: 1.8em 0 .5em; }
.prose p { margin: 0 0 1em; line-height: 1.75; }
.prose ul, .prose ol { margin: 0 0 1em; padding-left: 1.4em; line-height: 1.7; }
.prose li { margin-bottom: .35em; }
.prose a { color: var(--blue); text-decoration: underline; text-underline-offset: 2px; }
.prose blockquote {
  margin: 1.5em 0;
  padding: 14px 18px;
  border-left: 4px solid var(--orange);
  background: var(--surface);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text);
}
.prose blockquote p:last-child { margin-bottom: 0; }
.prose img { border-radius: var(--radius-sm); }
.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: .9375rem;
  margin: 1.5em 0;
  background: var(--surface);
}
.prose thead th {
  background: var(--navy);
  color: #fff;
  text-align: left;
  padding: 10px 14px;
  border: 1px solid var(--navy);
}
.prose td, .prose th { border: 1px solid var(--border); padding: 10px 14px; vertical-align: top; }
.prose tbody tr:nth-child(even) { background: var(--zebra); }

/* ---------- 21. 小型数据块（OEM 事实块等） ---------- */
.mini-stat {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px 18px;
}
.mini-stat .v { display: block; font-size: 1.25rem; font-weight: 800; color: var(--navy); }
.mini-stat .k { display: block; font-size: .875rem; color: var(--muted-ink); margin-top: 2px; }

/* ---------- 22. 工具类 ---------- */
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.text-note { color: var(--muted-ink); font-size: .875rem; }
.nowrap { white-space: nowrap; }

/* ---------- 23. 响应式：900px（导航折叠）与 600px（单列） ---------- */
@media (max-width: 900px) {
  .nav-toggle { display: flex; }
  .header-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--navy);
    border-top: 1px solid rgba(255, 255, 255, .15);
    box-shadow: var(--shadow-lg);
    padding: 10px 20px 20px;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
  }
  .site-header.is-open .header-nav { display: flex; }
  .nav-list { flex-direction: column; align-items: stretch; gap: 0; }
  .nav-list a { padding: 13px 4px; border-radius: 0; border-bottom: 1px solid rgba(255, 255, 255, .12); }
  .nav-list a[aria-current="page"] { color: var(--orange); }
  .header-actions {
    flex-direction: column;
    align-items: stretch;
    margin-left: 0;
    margin-top: 14px;
    gap: 10px;
  }
  .lang-btn { justify-content: space-between; width: 100%; }
  .lang-menu {
    position: static;
    box-shadow: none;
    margin-top: 6px;
    border: 1px solid var(--border);
  }
  .hero-grid { grid-template-columns: 1fr; padding: 44px 0 36px; }
  .hero-visual { order: -1; }
  .stat-strip-inner { grid-template-columns: repeat(2, 1fr); }
  .stat { padding: 16px 12px; }
  .stat:nth-child(odd) { border-left: 0; padding-left: 0; }
  .cols-3, .cols-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 28px; }
  .cta-band { padding: 28px 24px; }
}

@media (max-width: 600px) {
  .section { padding: 40px 0; }
  .container { padding: 0 16px; }
  .cols-2, .cols-3, .cols-4 { grid-template-columns: 1fr; }
  .stat-strip-inner { grid-template-columns: repeat(2, 1fr); }
  .form-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .hero-ctas .btn { flex: 1 1 100%; }
  .back-to-top { right: 14px; bottom: 14px; }
}

/* ---------- 24. 动效偏好与打印 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}

@media print {
  .site-header, .site-footer, .back-to-top, .breadcrumb, .cta-band { display: none !important; }
  body { background: #fff; }
  .card, .table-scroll { box-shadow: none; }
}