/* ============================================================
   Sub-THz 与太赫兹射频 · 整站样式（独立设计，thz-* 命名空间）
   视觉：明亮科技底 + 深海军蓝 + 频谱青；波导/频谱标尺母题
   ============================================================ */
:root {
  --thz-navy: #0A1F3C;
  --thz-navy-2: #10315C;
  --thz-primary: #0F4C81;
  --thz-accent: #00C2D1;
  --thz-accent-2: #5F8FFF;
  --thz-bg: #F4F8FC;
  --thz-surface: #FFFFFF;
  --thz-line: #C9D8E8;
  --thz-text: #16283C;
  --thz-muted: #5A6E85;
  --thz-header-h: 64px;
  --thz-radius: 14px;
  /* 面包屑左缘对齐正文 H2 文字左缘（[M18c++]） */
  --h2-inset: 16px;
  --page-card-inset: 48px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--thz-bg);
  color: var(--thz-text);
  font-size: 16px;
  line-height: 1.75;
  padding-top: var(--thz-header-h);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--thz-primary); text-decoration: none; transition: color .18s ease; }
a:hover { color: var(--thz-accent); }

img { max-width: 100%; }

.thz-container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--h2-inset);
}

/* ---------------- 顶部导航 ---------------- */
.thz-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--thz-header-h);
  background: linear-gradient(100deg, var(--thz-navy) 0%, var(--thz-navy-2) 60%, #14406F 100%);
  box-shadow: 0 2px 18px rgba(10, 31, 60, .28);
  z-index: 100;
}
.thz-header-inner {
  max-width: 1200px;
  height: 100%;
  margin: 0 auto;
  padding: 0 var(--h2-inset);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.thz-brand { display: flex; align-items: center; gap: 10px; color: #fff; }
.thz-brand:hover { color: #fff; }
.thz-brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px; height: 30px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--thz-accent), var(--thz-accent-2));
  color: var(--thz-navy);
  font-weight: 800;
  font-size: 13px;
  letter-spacing: .5px;
}
.thz-brand-text { font-size: 17px; font-weight: 700; letter-spacing: .5px; white-space: nowrap; }

.thz-nav { display: flex; align-items: center; gap: 4px; }
.thz-nav-link, .thz-nav-cta {
  padding: 8px 13px;
  border-radius: 8px;
  color: #D7E6F5;
  font-size: 15px;
  white-space: nowrap;
}
.thz-nav-link:hover { color: #fff; background: rgba(0, 194, 209, .16); }
.thz-nav-cta {
  margin-left: 8px;
  background: linear-gradient(135deg, var(--thz-accent), #26d6e6);
  color: var(--thz-navy);
  font-weight: 700;
}
.thz-nav-cta:hover { color: var(--thz-navy); filter: brightness(1.08); }

.thz-nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px; height: 38px;
  padding: 0 9px;
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .22);
  border-radius: 9px;
  cursor: pointer;
}
.thz-toggle-bar { display: block; height: 2px; background: #D7E6F5; border-radius: 2px; }

/* ---------------- 面包屑（与正文 H2 左缘严格对齐） ---------------- */
.thz-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  padding: 18px 0 14px;
  font-size: 13.5px;
  color: var(--thz-muted);
}
.thz-crumb-link { color: var(--thz-muted); }
.thz-crumb-link:hover { color: var(--thz-accent); }
.thz-crumb-sep { color: #9DB1C6; }
.thz-crumb-current { color: var(--thz-navy); font-weight: 600; }
/* 页面卡片内边距更深，面包屑随之一并内移到 H2 文字左缘 */
.thz-page-layout .thz-breadcrumb { margin-left: calc(var(--page-card-inset) - var(--h2-inset)); }

/* ---------------- 布局栅格 ---------------- */
.thz-layout-grid { display: grid; gap: 36px; align-items: start; }
/* 详情页：内容在前（1fr 占满），TOC 居右 240px */
.thz-article-layout .thz-layout-grid,
.thz-product-layout .thz-layout-grid { grid-template-columns: minmax(0, 1fr) 240px; }
/* 列表页：侧栏在前，240px 居左、内容 1fr 占满（防中间留白） */
.thz-list-layout .thz-layout-grid { grid-template-columns: 240px minmax(0, 1fr); }

.thz-content-main { min-width: 0; }
.thz-h1 {
  font-size: 1.72rem;
  line-height: 1.4;
  color: var(--thz-navy);
  margin: 6px 0 10px;
  letter-spacing: .3px;
}
.thz-article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  padding-bottom: 16px;
  margin-bottom: 8px;
  border-bottom: 1px solid var(--thz-line);
  font-size: 13.5px;
  color: var(--thz-muted);
}
.thz-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tag-text {
  display: inline-block;
  padding: 2px 10px;
  border: 1px solid var(--thz-line);
  border-radius: 999px;
  font-size: 12.5px;
  color: var(--thz-primary);
  background: #EEF5FB;
}
.thz-prod-meta { display: flex; flex-wrap: wrap; gap: 8px; margin: 4px 0 10px; }
.thz-prod-chip {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 600;
  border: 1px solid var(--thz-line);
  background: #F4F8FC;
  color: var(--thz-navy-2);
}
.thz-prod-chip-status { background: #EDF7FA; border-color: #A8E0E8; color: #06788A; }

/* ---------------- 正文排版 ---------------- */
.thz-content-main p { margin: 12px 0; }
.thz-content-main h2 {
  font-size: 1.3rem;
  color: var(--thz-navy);
  margin: 2.1em 0 .8em;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--thz-line);
  border-image: linear-gradient(90deg, var(--thz-accent), rgba(0, 194, 209, 0)) 1;
  line-height: 1.5;
}
.thz-content-main h3 {
  font-size: 1.08rem;
  color: var(--thz-navy-2);
  margin: 1.6em 0 .6em;
}
.thz-content-main ul, .thz-content-main ol { margin: 12px 0 12px 1.4em; }
.thz-content-main li { margin: 6px 0; }
.thz-content-main strong { color: var(--thz-navy); }
.thz-content-main blockquote {
  margin: 14px 0;
  padding: 12px 16px;
  background: #EDF7FA;
  border-left: 4px solid var(--thz-accent);
  border-radius: 0 10px 10px 0;
  color: #21465E;
}
.thz-content-main blockquote p { margin: 6px 0; }
.thz-content-main hr { border: none; border-top: 1px solid var(--thz-line); margin: 22px 0; }

/* 表格：同时覆盖 thz-spec 与正文裸 table（[M26]） */
.thz-content-main table,
table.thz-spec {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 14.5px;
  background: var(--thz-surface);
  border: 1px solid var(--thz-line);
}
.thz-content-main table th, .thz-content-main table td,
table.thz-spec th, table.thz-spec td {
  border: 1px solid var(--thz-line);
  padding: 9px 12px;
  text-align: left;
  vertical-align: top;
  line-height: 1.6;
}
.thz-content-main table thead th, table.thz-spec thead th {
  background: linear-gradient(135deg, var(--thz-navy), var(--thz-primary));
  color: #fff;
  font-weight: 600;
  white-space: nowrap;
}
.thz-content-main table tbody tr:nth-child(even), table.thz-spec tbody tr:nth-child(even) { background: #F0F6FB; }

/* FAQ（裸 <details>，与契约 faq_dom 对齐） */
.thz-faq-block { margin: 26px 0 10px; }
.thz-faq-block h2 { margin-top: 1.2em; }
.thz-faq-block details {
  border: 1px solid var(--thz-line);
  border-radius: 10px;
  margin: 10px 0;
  background: var(--thz-surface);
  overflow: hidden;
}
.thz-faq-block summary {
  cursor: pointer;
  padding: 12px 16px;
  font-weight: 600;
  color: var(--thz-navy);
  list-style: none;
  position: relative;
  padding-right: 40px;
}
.thz-faq-block summary::-webkit-details-marker { display: none; }
.thz-faq-block summary::after {
  content: "+";
  position: absolute;
  right: 14px; top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  color: var(--thz-accent);
  font-weight: 700;
}
.thz-faq-block details[open] summary::after { content: "−"; }
.thz-faq-block details p { padding: 0 16px 14px; color: #33475C; }

/* ---------------- 目录 / 分类折叠面板 ---------------- */
.thz-toc-aside {
  position: sticky;
  top: 80px;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
  min-width: 0;
}
.thz-cat-side {
  position: sticky;
  top: 80px;
  align-self: start;
}
.thz-toc-panel, .thz-cat-panel {
  background: var(--thz-surface);
  border: 1px solid var(--thz-line);
  border-radius: var(--thz-radius);
  overflow: hidden;
}
.thz-toc-summary, .thz-cat-summary {
  cursor: pointer;
  padding: 12px 16px;
  font-weight: 700;
  color: var(--thz-navy);
  font-size: 14.5px;
  list-style: none;
  background: linear-gradient(135deg, #EDF4FA, #E4F6F9);
  border-bottom: 1px solid var(--thz-line);
  position: relative;
  padding-right: 36px;
}
.thz-toc-summary::-webkit-details-marker, .thz-cat-summary::-webkit-details-marker { display: none; }
.thz-toc-summary::after, .thz-cat-summary::after {
  content: "▾";
  position: absolute;
  right: 14px; top: 50%;
  transform: translateY(-50%);
  color: var(--thz-primary);
  transition: transform .18s ease;
}
.thz-toc-panel[open] .thz-toc-summary::after,
.thz-cat-panel[open] .thz-cat-summary::after { transform: translateY(-50%) rotate(180deg); }

#toc { display: flex; flex-direction: column; padding: 8px 0; }
.thz-toc-link {
  display: block;
  padding: 7px 16px;
  font-size: 13.5px;
  line-height: 1.5;
  color: #3A5068;
  border-left: 3px solid transparent;
}
.thz-toc-link:hover { color: var(--thz-accent); background: #F2FAFC; border-left-color: var(--thz-accent); }
.thz-toc-l3 { padding-left: 30px; font-size: 13px; color: var(--thz-muted); }

.thz-category-list { list-style: none; margin: 0; padding: 8px 0; }
.thz-cat-link {
  display: block;
  padding: 9px 16px;
  font-size: 14.5px;
  color: #3A5068;
  border-left: 3px solid transparent;
}
.thz-cat-link:hover { color: var(--thz-accent); background: #F2FAFC; }
.thz-cat-active {
  color: var(--thz-navy);
  font-weight: 700;
  background: #EAF6F9;
  border-left-color: var(--thz-accent);
}

/* ---------------- 列表页 ---------------- */
.thz-cat-content { min-width: 0; }
.thz-list-desc { color: var(--thz-muted); margin: 0 0 20px; }
.thz-item-list { list-style: none; margin: 0; padding: 0; }
.thz-item {
  background: var(--thz-surface);
  border: 1px solid var(--thz-line);
  border-radius: var(--thz-radius);
  padding: 18px 20px;
  margin-bottom: 14px;
  transition: box-shadow .18s ease, transform .18s ease;
}
.thz-item:hover { box-shadow: 0 8px 24px rgba(10, 31, 60, .10); transform: translateY(-2px); }
.thz-item-title { font-size: 17px; font-weight: 700; color: var(--thz-navy); }
.thz-item-title:hover { color: var(--thz-accent); }
.thz-item-summary { margin: 8px 0 0; font-size: 14px; color: #44586E; }

.thz-pagination { display: flex; justify-content: center; gap: 8px; margin: 26px 0 8px; }
.thz-page-link, .thz-page-current {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px; height: 38px;
  padding: 0 10px;
  border-radius: 10px;
  border: 1px solid var(--thz-line);
  background: var(--thz-surface);
  font-size: 14.5px;
}
.thz-page-current {
  background: linear-gradient(135deg, var(--thz-navy), var(--thz-primary));
  color: #fff;
  border-color: transparent;
  font-weight: 700;
}

/* ---------------- 叶子页卡片 ---------------- */
.thz-page-card {
  background: var(--thz-surface);
  border: 1px solid var(--thz-line);
  border-radius: 18px;
  padding: var(--page-card-inset);
  margin-bottom: 48px;
}
.thz-page-lead { color: var(--thz-muted); margin-bottom: 18px; }
.thz-page-card h2 {
  font-size: 1.25rem;
  color: var(--thz-navy);
  margin: 1.8em 0 .7em;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--thz-line);
  border-image: linear-gradient(90deg, var(--thz-accent), rgba(0, 194, 209, 0)) 1;
}
.thz-page-card h3 { font-size: 1.05rem; color: var(--thz-navy-2); margin: 1.4em 0 .5em; }
.thz-page-card p { margin: 12px 0; }
.thz-page-card ul, .thz-page-card ol { margin: 12px 0 12px 1.4em; }
.thz-page-card li { margin: 6px 0; }
.thz-page-card table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 14.5px; border: 1px solid var(--thz-line); }
.thz-page-card th, .thz-page-card td { border: 1px solid var(--thz-line); padding: 9px 12px; text-align: left; }
.thz-page-card thead th { background: linear-gradient(135deg, var(--thz-navy), var(--thz-primary)); color: #fff; }
.thz-page-card tbody tr:nth-child(even) { background: #F0F6FB; }
.thz-page-card blockquote {
  margin: 14px 0; padding: 12px 16px;
  background: #EDF7FA; border-left: 4px solid var(--thz-accent);
  border-radius: 0 10px 10px 0; color: #21465E;
}

/* ---------------- 首页 ---------------- */
.thz-hero {
  position: relative;
  background:
    radial-gradient(900px 420px at 82% -10%, rgba(0, 194, 209, .22), transparent 60%),
    radial-gradient(700px 380px at 8% 110%, rgba(95, 143, 255, .18), transparent 60%),
    linear-gradient(160deg, var(--thz-navy) 0%, #0D2A50 55%, #103B69 100%);
  color: #E8F2FA;
  padding: 64px 0 54px;
  overflow: hidden;
}
.thz-hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(120, 170, 220, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120, 170, 220, .07) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,.9), rgba(0,0,0,.15));
}
.thz-hero .thz-container { position: relative; }
.thz-eyebrow {
  display: inline-block;
  padding: 5px 14px;
  border: 1px solid rgba(0, 194, 209, .5);
  border-radius: 999px;
  color: #9BE9F2;
  font-size: 13.5px;
  letter-spacing: 1px;
  background: rgba(0, 194, 209, .10);
}
.thz-hero-title {
  font-size: 2.5rem;
  line-height: 1.25;
  color: #fff;
  margin: 18px 0 12px;
  letter-spacing: 1px;
}
.thz-hero-sub {
  max-width: 760px;
  font-size: 1.05rem;
  color: #B9CFE4;
}
.thz-hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin: 26px 0 34px; }
.thz-spectrum-wrap {
  background: rgba(6, 22, 44, .55);
  border: 1px solid rgba(120, 170, 220, .25);
  border-radius: 16px;
  padding: 14px 10px 6px;
}
.thz-spectrum { width: 100%; height: auto; display: block; }
.thz-hero-facts {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 26px;
}
.thz-hero-facts li {
  flex: 1 1 200px;
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(120, 170, 220, .22);
  border-radius: 12px;
  padding: 12px 16px;
}
.thz-hero-facts strong { display: block; color: #7FE3F0; font-size: 1.02rem; }
.thz-hero-facts span { color: #9FB6CC; font-size: 13.5px; }

.thz-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 11px 24px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
}
.thz-btn-primary {
  background: linear-gradient(135deg, var(--thz-accent), #33D9E8);
  color: var(--thz-navy);
  box-shadow: 0 8px 22px rgba(0, 194, 209, .35);
}
.thz-btn-primary:hover { color: var(--thz-navy); filter: brightness(1.07); }
.thz-btn-ghost { border-color: rgba(155, 210, 235, .55); color: #CFE6F5; background: rgba(255,255,255,.04); }
.thz-btn-ghost:hover { color: #fff; border-color: var(--thz-accent); }

.thz-section { padding: 56px 0; }
.thz-section-alt { background: #EBF3FA; border-block: 1px solid var(--thz-line); }
.thz-section-title {
  font-size: 1.55rem;
  color: var(--thz-navy);
  letter-spacing: .5px;
}
.thz-section-title::after {
  content: "";
  display: block;
  width: 56px; height: 4px;
  border-radius: 2px;
  margin-top: 10px;
  background: linear-gradient(90deg, var(--thz-accent), var(--thz-accent-2));
}
.thz-section-lead { color: var(--thz-muted); max-width: 780px; margin: 14px 0 26px; }
.thz-section-more { margin-top: 22px; font-weight: 600; }

.thz-prod-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.thz-prod-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: var(--thz-surface);
  border: 1px solid var(--thz-line);
  border-radius: var(--thz-radius);
  padding: 22px;
  color: var(--thz-text);
  transition: box-shadow .18s ease, transform .18s ease, border-color .18s ease;
}
.thz-prod-card:hover {
  border-color: var(--thz-accent);
  box-shadow: 0 10px 28px rgba(10, 31, 60, .12);
  transform: translateY(-3px);
  color: var(--thz-text);
}
.thz-prod-num {
  font-size: 13px;
  font-weight: 800;
  color: var(--thz-accent);
  letter-spacing: 1px;
}
.thz-prod-name { font-size: 17.5px; font-weight: 700; color: var(--thz-navy); }
.thz-prod-desc { font-size: 14px; color: #4A5F76; flex: 1; }
.thz-prod-go { font-size: 13.5px; font-weight: 600; color: var(--thz-primary); }

.thz-chip-row { list-style: none; display: flex; flex-wrap: wrap; gap: 10px; }
.thz-chip {
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid #B9D2E8;
  background: var(--thz-surface);
  color: var(--thz-primary);
  font-size: 14px;
  font-weight: 600;
}
.thz-chip:hover { border-color: var(--thz-accent); color: #06788A; }

.thz-scene-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.thz-scene-card {
  background: var(--thz-surface);
  border: 1px solid var(--thz-line);
  border-top: 4px solid var(--thz-accent);
  border-radius: var(--thz-radius);
  padding: 20px;
}
.thz-scene-card h3 { font-size: 16.5px; color: var(--thz-navy); margin-bottom: 8px; }
.thz-scene-card p { font-size: 14px; color: #4A5F76; }
.thz-scene-card a { display: inline-block; margin-top: 10px; font-size: 13.5px; font-weight: 600; }

.thz-feature-list { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.thz-feature-item {
  background: var(--thz-surface);
  border: 1px solid var(--thz-line);
  border-radius: var(--thz-radius);
  padding: 16px 18px;
}
.thz-feature-title { font-size: 15.5px; font-weight: 700; color: var(--thz-navy); }
.thz-feature-summary { font-size: 13.5px; color: #4A5F76; margin-top: 6px; }

.thz-cta {
  background:
    radial-gradient(600px 260px at 85% 20%, rgba(0, 194, 209, .25), transparent 60%),
    linear-gradient(120deg, var(--thz-navy), #0E3A66);
  color: #E8F2FA;
  padding: 52px 0;
}
.thz-cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 26px; flex-wrap: wrap; }
.thz-cta-title { font-size: 1.5rem; color: #fff; }
.thz-cta-desc { color: #B9CFE4; max-width: 640px; margin-top: 8px; }

/* ---------------- 归档 / 404 ---------------- */
.thz-archive-group { margin-top: 26px; }
.thz-archive-title { font-size: 1.2rem; color: var(--thz-navy); margin-bottom: 6px; }
.thz-archive-sub { font-size: 1rem; color: var(--thz-primary); margin: 14px 0 4px; }
.thz-archive-list { list-style: none; margin: 0 0 6px; padding: 0; }
.thz-archive-list li { padding: 5px 0; border-bottom: 1px dashed var(--thz-line); font-size: 14.5px; }
.thz-404-card { text-align: center; padding: 64px var(--page-card-inset); }
.thz-404-code {
  font-size: 3.4rem;
  font-weight: 800;
  color: var(--thz-accent);
  letter-spacing: 4px;
}
.thz-404-links { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-top: 22px; }
.thz-404-links .thz-btn-ghost { color: var(--thz-primary); border-color: var(--thz-line); background: #F4F8FC; }

/* ---------------- 页脚 ---------------- */
.thz-footer {
  background: linear-gradient(170deg, var(--thz-navy), #081831);
  color: #AFC6DB;
  padding: 48px 0 0;
  margin-top: 8px;
}
.thz-footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 28px;
  padding-bottom: 34px;
}
.thz-footer-brand { display: flex; align-items: center; gap: 10px; color: #fff; font-size: 16.5px; font-weight: 700; margin-bottom: 12px; }
.thz-footer-desc { font-size: 13.5px; line-height: 1.7; color: #93A9C0; }
.thz-footer-title { color: #fff; font-size: 14.5px; font-weight: 700; margin-bottom: 12px; }
.thz-footer-link { display: block; padding: 4px 0; font-size: 13.5px; color: #AFC6DB; }
.thz-footer-link:hover { color: var(--thz-accent); }
.thz-mail { display: inline-block; font-size: 14px; color: #7FE3F0; font-weight: 600; letter-spacing: .4px; }
.thz-footer-note { font-size: 12.5px; color: #7E93AB; margin-top: 10px; }
.thz-footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .10);
  padding: 16px 0;
  font-size: 12.5px;
  color: #7E93AB;
  text-align: center;
}

/* ---------------- 悬浮工具胶囊（右侧中央） ---------------- */
.thz-capsule {
  position: fixed;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 95;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 10px 8px;
  border-radius: 999px;
  background: linear-gradient(165deg, var(--thz-navy) 0%, var(--thz-primary) 55%, #12708A 100%);
  box-shadow: 0 10px 30px rgba(10, 31, 60, .35);
  border: 1px solid rgba(0, 194, 209, .35);
}
.thz-cap-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  width: 52px;
  padding: 9px 0 8px;
  border: none;
  border-radius: 999px;
  background: transparent;
  color: #D9ECF7;
  cursor: pointer;
  transition: background .18s ease, color .18s ease;
  font-family: inherit;
}
.thz-cap-btn:hover { background: rgba(0, 194, 209, .22); color: #fff; }
.thz-cap-icon { width: 21px; height: 21px; }
.thz-cap-text { font-size: 11.5px; letter-spacing: .5px; }

.thz-card-modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(6, 18, 36, .72);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.thz-card-modal[hidden] { display: none; }
.thz-card-modal-box { position: relative; }
/* 名片按 300×500 原尺寸高清显示，不做压缩缩放 */
.thz-card-img {
  display: block;
  width: 300px;
  height: 500px;
  border-radius: 12px;
  box-shadow: 0 18px 50px rgba(0, 0, 0, .45);
  background: #fff;
}
.thz-card-close {
  position: absolute;
  top: -14px; right: -14px;
  width: 34px; height: 34px;
  border-radius: 50%;
  border: none;
  background: #fff;
  color: var(--thz-navy);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(0, 0, 0, .3);
}
.thz-mail-pop {
  position: fixed;
  right: 84px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 96;
  background: #fff;
  color: var(--thz-navy);
  border: 1px solid var(--thz-line);
  border-radius: 12px;
  padding: 12px 16px;
  font-size: 14px;
  font-weight: 700;
  box-shadow: 0 10px 28px rgba(10, 31, 60, .18);
  white-space: nowrap;
}
.thz-mail-pop[hidden] { display: none; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 1024px) {
  /* 注意：选择器特异性必须与桌面端规则一致（媒体查询不提升优先级），
     否则 .thz-*-layout .thz-layout-grid 的双类名规则会压制本处的单类名规则，导致手机端栅格不折叠 */
  .thz-layout-grid,
  .thz-article-layout .thz-layout-grid,
  .thz-product-layout .thz-layout-grid,
  .thz-list-layout .thz-layout-grid { grid-template-columns: 1fr; gap: 24px; }
  .thz-toc-aside { position: static; max-height: none; }
  .thz-cat-side { position: static; }
  .thz-prod-grid, .thz-scene-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .thz-feature-list { grid-template-columns: 1fr; }
  .thz-footer-grid { grid-template-columns: 1fr 1fr; }
  .thz-hero-title { font-size: 2rem; }
}

@media (max-width: 768px) {
  body { font-size: 15px; }
  /* 为右侧悬浮胶囊让出空间，避免正文滑到胶囊底下 */
  .thz-container { padding-right: 84px; }
  .thz-nav-toggle { display: flex; }
  .thz-nav {
    position: absolute;
    top: var(--thz-header-h);
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 10px var(--h2-inset) 16px;
    background: linear-gradient(180deg, var(--thz-navy), #0D2A50);
    border-top: 1px solid rgba(255, 255, 255, .10);
    box-shadow: 0 16px 30px rgba(10, 31, 60, .35);
  }
  .thz-nav:not(.thz-nav-open) { display: none; }
  .thz-nav-link, .thz-nav-cta { padding: 12px 14px; font-size: 15.5px; }
  .thz-nav-cta { margin-left: 0; text-align: center; }
  .thz-prod-grid, .thz-scene-grid { grid-template-columns: 1fr; }
  .thz-footer-grid { grid-template-columns: 1fr; }
  .thz-hero { padding: 44px 0 40px; }
  .thz-hero-title { font-size: 1.7rem; }
  .thz-page-card { padding: 24px; }
  .thz-page-layout .thz-breadcrumb { margin-left: calc(24px - var(--h2-inset)); }
  .thz-capsule { right: 10px; padding: 8px 6px; }
  .thz-cap-btn { width: 46px; }
  .thz-card-img { width: 300px; height: 500px; max-width: calc(100vw - 48px); }
  .thz-h1 { font-size: 1.4rem; }
}