/* ============================================================
   mcx.射频连接器.公司 —— 商业科技风主题
   ============================================================ */
:root {
  --blue-900: #0b2a55;
  --blue-700: #0d47a1;
  --blue-600: #1565c0;
  --blue-500: #1976d2;
  --blue-100: #dceafc;
  --cyan-500: #00c6ff;
  --ink-900: #10203a;
  --ink-600: #34527a;
  --ink-400: #6b83a3;
  --bg: #f5f9fd;
  --bg-card: #ffffff;
  --line: #dde7f2;
  --radius: 14px;
  --shadow: 0 6px 24px rgba(13, 71, 161, .08);
  --shadow-lg: 0 16px 48px rgba(13, 71, 161, .16);
  --wrap: 1200px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
  color: var(--ink-900);
  background: var(--bg);
  line-height: 1.75;
}
img { max-width: 100%; height: auto; }
a { color: var(--blue-600); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.3; color: var(--blue-900); }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
.wrap.narrow { max-width: 860px; }
.skip-link {
  position: absolute; left: -9999px; top: 0; background: var(--blue-700);
  color: #fff; padding: 8px 16px; border-radius: 0 0 8px 0; z-index: 100;
}
.skip-link:focus { left: 0; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; gap: 24px; min-height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-text strong { color: var(--blue-900); font-size: 17px; }
.brand-text small { color: var(--ink-400); font-size: 12px; }
.site-nav { margin-left: auto; display: flex; gap: 4px; }
.site-nav a {
  padding: 8px 14px; border-radius: 8px; color: var(--ink-600); font-size: 15px;
}
.site-nav a:hover { background: var(--blue-100); text-decoration: none; color: var(--blue-700); }
.nav-toggle { display: none; margin-left: auto; }
.breadcrumb { padding: 14px 24px 0; }
.breadcrumb ol { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; margin: 0; padding: 0; font-size: 13px; color: var(--ink-400); }
.breadcrumb li:not(:first-child)::before { content: "›"; margin-right: 6px; color: var(--ink-400); }
.breadcrumb a { color: var(--ink-400); }

/* ---------- hero ---------- */
.hero {
  background:
    radial-gradient(900px 420px at 85% -10%, rgba(0, 198, 255, .18), transparent 60%),
    linear-gradient(135deg, #0b2a55 0%, #0d47a1 55%, #1565c0 100%);
  color: #fff; padding: 72px 0 84px; overflow: hidden;
}
.hero-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 48px; align-items: center; }
.hero-eyebrow { letter-spacing: .12em; font-size: 13px; color: #9fd4ff; margin: 0 0 10px; }
.hero h1 { color: #fff; font-size: clamp(28px, 4vw, 44px); margin: 0 0 16px; }
.hero-accent { color: var(--cyan-500); }
.hero-sub { color: #cfe3f8; max-width: 620px; font-size: 16.5px; }
.hero-actions { display: flex; gap: 14px; margin: 26px 0 30px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 18px; list-style: none; padding: 0; margin: 0; flex-wrap: wrap; }
.hero-stats li {
  background: rgba(255, 255, 255, .08); border: 1px solid rgba(255, 255, 255, .18);
  border-radius: 12px; padding: 10px 18px; min-width: 118px;
}
.hero-stats strong { display: block; font-size: 20px; color: #fff; }
.hero-stats span { font-size: 12.5px; color: #b9d7f5; }
.hero-visual { position: relative; height: 340px; }
.orbit { position: absolute; border-radius: 50%; border: 1.5px solid rgba(255, 255, 255, .25); }
.o1 { inset: 0; border-style: dashed; animation: spin 40s linear infinite; }
.o2 { inset: 34px; border-color: rgba(0, 198, 255, .55); animation: spin 28s linear infinite reverse; }
.o3 { inset: 68px; border-color: rgba(255, 255, 255, .4); }
.orbit-core {
  position: absolute; inset: 118px; border-radius: 50%;
  background: linear-gradient(135deg, #1976d2, #00c6ff);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 26px; color: #fff; box-shadow: 0 0 60px rgba(0, 198, 255, .5);
}
.orbit-tag {
  position: absolute; background: rgba(255, 255, 255, .12); border: 1px solid rgba(255, 255, 255, .3);
  padding: 4px 12px; border-radius: 999px; font-size: 12.5px; color: #eaf5ff;
}
.t1 { top: 8px; right: -8px; }
.t2 { bottom: 12px; left: -8px; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .orbit { animation: none; }
}

/* ---------- sections ---------- */
.section { padding: 64px 0; }
.section-tint { background: #eef4fb; }
.section-head { max-width: 720px; margin-bottom: 32px; }
.section-head h2 { font-size: 28px; margin: 0 0 8px; }
.section-head p { color: var(--ink-600); margin: 0; }
.section-more { margin-top: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.card {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px; box-shadow: var(--shadow); transition: transform .2s, box-shadow .2s;
  display: block; color: inherit;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); text-decoration: none; }
.card h3 { margin: 0 0 8px; font-size: 18px; }
.card p { color: var(--ink-600); font-size: 14.5px; margin: 0; }
.card-more { display: inline-block; margin-top: 14px; color: var(--blue-600); font-size: 14px; }
.scene-no { font-size: 13px; font-weight: 700; color: var(--cyan-500); letter-spacing: .1em; }
.scene-card h3 { margin-top: 6px; }
.service-item {
  background: var(--bg-card); border: 1px solid var(--line); border-left: 4px solid var(--blue-500);
  border-radius: 10px; padding: 20px 24px;
}
.service-item h3 { margin: 0 0 6px; font-size: 17px; }
.service-item p { margin: 0; color: var(--ink-600); font-size: 14.5px; }
.boundary-item {
  background: #fff7f0; border: 1px solid #f2ddc8; border-radius: 10px; padding: 18px 22px;
}
.boundary-item h3 { margin: 0 0 4px; font-size: 16px; color: #8a4b12; }
.boundary-item p { margin: 0; color: #7a5a37; font-size: 14.5px; }
.table-note { color: var(--ink-400); font-size: 13.5px; margin-top: 12px; }

/* ---------- tables ---------- */
.table-wrap { overflow-x: auto; border-radius: 12px; box-shadow: var(--shadow); }
table.data {
  width: 100%; border-collapse: collapse; background: #fff; font-size: 14.5px; min-width: 640px;
}
table.data th, table.data td {
  border: 1px solid var(--line); padding: 10px 14px; text-align: left; vertical-align: top;
}
table.data thead th { background: var(--blue-700); color: #fff; white-space: nowrap; }
table.data tbody tr:nth-child(even) { background: #f6fafd; }

/* ---------- buttons / chips ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 11px 22px;
  border-radius: 999px; border: 1px solid transparent; font-size: 15px; cursor: pointer;
  transition: transform .15s, box-shadow .15s;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }
.btn-primary { background: linear-gradient(135deg, var(--blue-500), var(--cyan-500)); color: #fff; box-shadow: 0 8px 20px rgba(25, 118, 210, .35); }
.btn-ghost { border-color: rgba(255, 255, 255, .6); color: #fff; background: transparent; }
.section .btn-ghost { border-color: var(--blue-500); color: var(--blue-600); }
.btn-light { background: #fff; color: var(--blue-700); font-weight: 600; }
.btn-lg { padding: 14px 30px; font-size: 16px; }
.chip {
  display: inline-block; background: var(--blue-100); color: var(--blue-700);
  border-radius: 999px; padding: 3px 12px; font-size: 13px; margin-right: 8px;
}
.chip-ghost { background: #eef2f7; color: var(--ink-600); }
.tag-row { margin: 10px 0 0; }
.tag-text {
  display: inline-block; background: #eef2f7; color: var(--ink-600);
  border-radius: 6px; padding: 2px 10px; font-size: 12.5px; margin: 0 6px 6px 0;
}

/* ---------- cta ---------- */
.cta-band {
  background: linear-gradient(120deg, #0b2a55, #0d47a1); color: #fff; padding: 56px 0;
}
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.cta-inner h2 { color: #fff; margin: 0 0 8px; }
.cta-inner p { color: #cfe3f8; margin: 0; max-width: 560px; }

/* ---------- doc pages ---------- */
.doc-layout { display: grid; grid-template-columns: minmax(0, 760px) 240px; gap: 40px; padding-top: 32px; padding-bottom: 64px; }
.leaf-layout { grid-template-columns: minmax(0, 860px); justify-content: center; }
.doc-header h1 { font-size: 30px; margin: 8px 0 0; }
.doc-meta { color: var(--ink-400); font-size: 13.5px; margin: 0; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.doc-body { font-size: 16px; }
.doc-body h2 { font-size: 23px; margin: 40px 0 12px; padding-left: 12px; border-left: 4px solid var(--blue-500); }
.doc-body h3 { font-size: 18px; margin: 28px 0 8px; }
.doc-body p { margin: 12px 0; color: var(--ink-900); }
.doc-body ul, .doc-body ol { padding-left: 22px; }
.doc-body li { margin: 6px 0; }
.doc-body blockquote {
  margin: 16px 0; padding: 12px 18px; background: #eef4fb; border-left: 4px solid var(--cyan-500);
  border-radius: 0 10px 10px 0; color: var(--ink-600);
}
.case-callout {
  margin: 28px 0; padding: 18px 22px; border-radius: 12px;
  background: linear-gradient(135deg, #eef9ff, #e8f4fd); border: 1px solid #cfe8fa;
}
.case-callout strong { color: var(--blue-700); display: block; margin-bottom: 6px; }
.case-callout p { margin: 0; color: var(--ink-600); }
.toc-inline {
  background: #f6fafd; border: 1px solid var(--line); border-radius: 12px; padding: 14px 20px; margin: 20px 0;
}
.toc-title { font-weight: 700; color: var(--blue-900); margin: 0 0 8px; }
.toc-inline ol { margin: 0; padding-left: 20px; font-size: 14px; }
.toc-aside { position: sticky; top: 80px; max-height: calc(100vh - 100px); overflow-y: auto; }
.toc-aside #toc { list-style: none; margin: 0; padding: 0; font-size: 14px; border-left: 2px solid var(--line); }
.toc-aside #toc li a { display: block; padding: 6px 0 6px 14px; color: var(--ink-600); border-left: 2px solid transparent; margin-left: -2px; }
.toc-aside #toc li a:hover, .toc-aside #toc li a.active { color: var(--blue-600); border-left-color: var(--blue-500); text-decoration: none; }
.toc-side-extra { margin-top: 18px; }

/* ---------- faq ---------- */
.faq-section { margin-top: 40px; }
.faq-section h2 { font-size: 21px; margin-bottom: 14px; }
details {
  background: #fff; border: 1px solid var(--line); border-radius: 10px;
  padding: 0 18px; margin: 10px 0;
}
details[open] { border-color: var(--blue-500); }
summary { cursor: pointer; padding: 13px 0; font-weight: 600; color: var(--blue-900); }
details p { color: var(--ink-600); margin: 0 0 14px; font-size: 15px; }

/* ---------- list pages ---------- */
.cat-layout { display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 40px; padding: 36px 24px 64px; }
.cat-side-title { font-weight: 700; color: var(--blue-900); margin: 0 0 10px; }
ul.category-list { list-style: none; margin: 0; padding: 0; }
ul.category-list li a {
  display: block; padding: 10px 14px; border-radius: 8px; color: var(--ink-600); font-size: 15px;
  border-left: 3px solid transparent;
}
ul.category-list li a:hover { background: var(--blue-100); text-decoration: none; }
ul.category-list li a.active {
  background: var(--blue-100); color: var(--blue-700); font-weight: 600; border-left-color: var(--blue-500);
}
.cat-content h1 { margin: 0 0 8px; font-size: 28px; }
.lead { color: var(--ink-600); }
.item-list { list-style: none; padding: 0; margin: 20px 0; display: grid; gap: 16px; }
.item-card {
  background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 20px 24px;
  box-shadow: var(--shadow); transition: transform .2s;
}
.item-card:hover { transform: translateY(-2px); }
.item-cat { font-size: 13px; margin: 0 0 6px; }
.item-card h2 { margin: 0 0 6px; font-size: 19px; }
.item-card h2 a { color: var(--blue-900); }
.item-summary { color: var(--ink-600); font-size: 14.5px; margin: 0; }
.archive-list { list-style: none; padding: 0; }
.archive-list li { display: flex; gap: 14px; padding: 9px 0; border-bottom: 1px dashed var(--line); font-size: 15px; }
.archive-date { color: var(--ink-400); font-variant-numeric: tabular-nums; }
.archive-kind { background: #eef2f7; border-radius: 6px; padding: 0 8px; font-size: 12.5px; color: var(--ink-600); height: fit-content; }

/* ---------- 404 ---------- */
.e404 { text-align: center; padding: 96px 24px; }
.e404-code { font-size: 88px; font-weight: 800; color: var(--blue-100); margin: 0; line-height: 1; }

/* ---------- footer ---------- */
.site-footer { background: var(--blue-900); color: #c9d9ec; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; padding: 48px 24px; }
.footer-logo { display: flex; align-items: center; gap: 10px; }
.footer-logo strong { color: #fff; font-size: 17px; }
.footer-logo span { color: #8fb6e3; font-weight: 400; }
.site-footer h3 { color: #fff; font-size: 15px; margin: 0 0 12px; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin: 7px 0; }
.site-footer a { color: #c9d9ec; }
.site-footer a:hover { color: #fff; }
.footer-brand p { font-size: 14px; }
.footer-beian { border-top: 1px solid rgba(255, 255, 255, .12); background: #081f3f; }
.beian-inner {
  display: flex; justify-content: center; flex-wrap: wrap; gap: 10px 28px; padding: 14px 24px; font-size: 13px;
}
.beian-link { display: inline-flex; align-items: center; gap: 7px; color: #c9d9ec; }
.beian-link:hover { color: #fff; text-decoration: none; }
.icp-icon, .gongan-icon { display: inline-block; border-radius: 2px; vertical-align: middle; }

/* ---------- capsules（右侧中部名片悬浮 + 底部回顶部） ---------- */
.side-card-dock {
  position: fixed; right: 0; top: 50%; transform: translateY(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  padding: 16px 12px; z-index: 60; cursor: pointer; text-decoration: none;
  border-radius: 12px 0 0 12px; border: 1px solid var(--line); border-right: none;
  background: rgba(255, 255, 255, .97); color: var(--blue-700);
  font-size: 13px; font-weight: 600; letter-spacing: .08em;
  box-shadow: var(--shadow-lg); transition: background .15s, color .15s;
}
.side-card-dock:hover { background: var(--blue-600); color: #fff; }
.side-card-dock span { writing-mode: horizontal-tb; }
.dock-capsules {
  position: fixed; left: 50%; bottom: 26px; transform: translateX(-50%);
  display: flex; gap: 10px; z-index: 60;
}
.capsule {
  display: inline-flex; align-items: center; gap: 7px; padding: 10px 18px;
  border-radius: 999px; border: 1px solid var(--line); background: rgba(255, 255, 255, .96);
  color: var(--blue-700); font-size: 14px; font-weight: 600; cursor: pointer;
  box-shadow: var(--shadow-lg); transition: transform .15s, background .15s;
}
.capsule:hover { transform: translateY(-3px); background: #fff; }
.capsule svg { color: var(--blue-500); }
#back-to-top { opacity: 0; pointer-events: none; transition: opacity .2s; }
#back-to-top.is-visible { opacity: 1; pointer-events: auto; }

/* ---------- card modal ---------- */
.card-modal { position: fixed; inset: 0; z-index: 90; display: flex; align-items: center; justify-content: center; }
.card-modal[hidden] { display: none; }
.card-modal-backdrop { position: absolute; inset: 0; background: rgba(6, 20, 40, .78); }
.card-modal-body {
  position: relative; background: #fff; border-radius: 16px; padding: 14px;
  box-shadow: var(--shadow-lg); max-width: min(92vw, 520px);
}
.card-modal-body img { display: block; width: auto; max-width: 100%; max-height: 86vh; border-radius: 10px; }
.card-modal-close {
  position: absolute; top: -16px; right: -16px; width: 40px; height: 40px; border-radius: 50%;
  border: none; background: var(--blue-700); color: #fff; font-size: 22px; cursor: pointer;
  box-shadow: var(--shadow);
}

/* ---------- responsive ---------- */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .doc-layout { grid-template-columns: minmax(0, 1fr); }
  .toc-aside { display: none; }
  .cat-layout { grid-template-columns: minmax(0, 1fr); }
  .cat-side ul.category-list { display: flex; flex-wrap: wrap; gap: 8px; }
  .cat-side ul.category-list li a { border-left: none; border: 1px solid var(--line); }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
}
@media (max-width: 640px) {
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .hero { padding: 48px 0 56px; }
  .section { padding: 44px 0; }
  .nav-toggle {
    display: block; background: none; border: 1px solid var(--line); border-radius: 8px;
    padding: 6px 12px; color: var(--ink-600); cursor: pointer;
  }
  .site-nav {
    display: none; position: absolute; top: 68px; left: 0; right: 0;
    background: #fff; border-bottom: 1px solid var(--line); flex-direction: column; padding: 10px 16px;
  }
  .site-nav.open { display: flex; }
  .dock-capsules { bottom: 16px; }
  .capsule { padding: 9px 14px; font-size: 13px; }
  .side-card-dock { padding: 10px 8px; font-size: 12px; gap: 4px; }
}