:root {
  --primary: #0EA5E9;
  --primary2: #2563EB;
  --accent: #22D3EE;
  --bg-0: #0B1120;
  --bg-1: #0F172A;
  --bg-2: #111c33;
  --text: #E2E8F0;
  --muted: #94A3B8;
  --ok: #10B981;
  --warn: #F59E0B;
  --danger: #EF4444;
  --card: rgba(255, 255, 255, 0.04);
  --card-border: rgba(125, 211, 252, 0.18);
  --glass: rgba(15, 23, 42, 0.72);
  --h2-inset: 0px; /* 面包屑与正文左缘对齐：二者同处布局容器内，左内边距一致 */
  --maxw: 1180px;
  --radius: 16px;
  --font: "PingFang SC", "Microsoft YaHei", "思源黑体", Roboto, system-ui, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(1100px 600px at 12% -8%, rgba(37, 99, 235, 0.18), transparent 60%),
    radial-gradient(900px 520px at 92% 0%, rgba(34, 211, 238, 0.14), transparent 55%),
    linear-gradient(180deg, var(--bg-0), var(--bg-1) 40%, var(--bg-2));
  background-attachment: fixed;
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; transition: color .2s; }
a:hover { color: #7dd3fc; }
img { max-width: 100%; }

/* ---------- Header ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  background: var(--glass);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid rgba(125, 211, 252, 0.12);
}
.nav-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 12px 20px;
  display: flex; align-items: center; gap: 18px;
}
.logo {
  font-weight: 700; font-size: 18px; color: #fff; letter-spacing: .5px;
  background: linear-gradient(90deg, var(--accent), var(--primary));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
  white-space: nowrap;
}
.nav-links { display: flex; align-items: center; gap: 6px; margin-left: auto; flex-wrap: wrap; }
.nav-links > a, .nav-group-title {
  color: var(--text); padding: 8px 12px; border-radius: 10px; font-size: 15px;
  cursor: pointer; user-select: none;
}
.nav-links > a:hover, .nav-group-title:hover { background: rgba(125,211,252,.08); color: #fff; }
.nav-group { position: relative; }
.nav-group-menu {
  position: absolute; top: 110%; left: 0; min-width: 180px;
  background: var(--glass); backdrop-filter: blur(14px);
  border: 1px solid var(--card-border); border-radius: 12px;
  padding: 8px; display: none; flex-direction: column; gap: 2px; z-index: 60;
}
.nav-group:hover .nav-group-menu { display: flex; }
.nav-group-menu a { padding: 8px 10px; border-radius: 8px; color: var(--text); font-size: 14px; }
.nav-group-menu a:hover { background: rgba(125,211,252,.1); }
.nav-cta {
  background: linear-gradient(90deg, var(--primary), var(--accent));
  color: #04121f !important; font-weight: 600; padding: 8px 16px !important;
}
.nav-toggle { display: none; background: none; border: 1px solid var(--card-border);
  color: #fff; font-size: 20px; border-radius: 10px; padding: 4px 10px; cursor: pointer; }

/* ---------- Layout ---------- */
main { padding-top: 70px; }
.breadcrumb, .article-layout, .list-layout, .page-wrap {
  max-width: var(--maxw); margin: 0 auto; padding: 0 20px;
}
.breadcrumb {
  padding-top: 22px; padding-bottom: 14px;
  font-size: 14px; color: var(--muted);
}
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { margin: 0 8px; opacity: .5; }
.breadcrumb .current { color: var(--text); }

/* Article / Product detail */
.article-layout { display: grid; grid-template-columns: 240px 1fr; gap: 36px; align-items: start; padding-bottom: 60px; }
.toc-aside {
  position: sticky; top: 86px; max-height: calc(100vh - 110px); overflow-y: auto;
  background: var(--card); border: 1px solid var(--card-border);
  border-radius: 14px; padding: 16px;
}
.toc-title { font-size: 13px; color: var(--muted); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 10px; }
.toc-title .cat-arrow { display: none; }
.toc-list { list-style: none; }
.toc-list li { margin: 4px 0; }
.toc-list a { font-size: 14px; color: var(--muted); display: block; padding: 4px 8px; border-radius: 8px; border-left: 2px solid transparent; }
.toc-list a:hover { color: #fff; border-left-color: var(--accent); background: rgba(125,211,252,.06); }
.toc-l3 a { padding-left: 20px; font-size: 13px; }

.content-main { min-width: 0; }
.article-title, .page-title, .list-title {
  font-size: 32px; font-weight: 700; line-height: 1.3; margin-bottom: 18px;
  background: linear-gradient(90deg, #fff, #bae6fd);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.summary-block {
  background: linear-gradient(180deg, rgba(14,165,233,.12), rgba(34,211,238,.06));
  border: 1px solid var(--card-border); border-left: 3px solid var(--accent);
  padding: 16px 18px; border-radius: 12px; color: #cbd5e1; margin-bottom: 16px;
}
.keyword-row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 10px; }
.kw-label { color: var(--muted); font-size: 14px; }
.tag-text {
  display: inline-block; font-size: 13px; color: #bae6fd;
  background: rgba(34,211,238,.1); border: 1px solid rgba(34,211,238,.25);
  padding: 2px 10px; border-radius: 999px;
}
.update-time { display: inline-block; color: var(--muted); font-size: 13px; margin-bottom: 18px; }

.content-main h2 { font-size: 24px; font-weight: 700; margin: 34px 0 14px; padding-bottom: 8px; border-bottom: 1px solid rgba(125,211,252,.15); }
.content-main h3 { font-size: 19px; font-weight: 600; margin: 24px 0 10px; color: #e0f2fe; }
.content-main p { margin: 12px 0; color: #cbd5e1; }
.content-main ul.body-list, .content-main ol.body-list { margin: 12px 0 12px 22px; }
.content-main li { margin: 6px 0; }
.content-main code { background: rgba(125,211,252,.12); padding: 1px 6px; border-radius: 6px; font-size: 14px; color: #7dd3fc; }
hr { border: none; border-top: 1px solid rgba(125,211,252,.15); margin: 26px 0; }

table.data {
  width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 15px;
  background: var(--card); border: 1px solid var(--card-border); border-radius: 12px; overflow: hidden;
}
table.data th, table.data td { padding: 10px 14px; text-align: left; border-bottom: 1px solid rgba(125,211,252,.1); }
table.data th { background: rgba(14,165,233,.14); color: #e0f2fe; font-weight: 600; }
table.data tr:last-child td { border-bottom: none; }

blockquote.note, blockquote.conclusion {
  margin: 16px 0; padding: 14px 18px; border-radius: 12px; border-left: 3px solid var(--primary);
  background: rgba(37,99,235,.08); color: #cbd5e1;
}
blockquote.conclusion { border-left-color: var(--ok); background: rgba(16,185,129,.08); }

details {
  border: 1px solid var(--card-border); border-radius: 12px; padding: 4px 16px; margin: 10px 0;
  background: var(--card);
}
details summary { cursor: pointer; font-weight: 600; padding: 10px 0; color: #e0f2fe; list-style: none; }
details summary::-webkit-details-marker { display: none; }
details summary::before { content: "＋ "; color: var(--accent); }
details[open] summary::before { content: "－ "; }
details p { margin: 6px 0 12px; color: #cbd5e1; }

.faq-section { margin-top: 36px; }
.faq-heading { font-size: 22px; margin-bottom: 12px; }

/* ---------- Home ---------- */
.hero { position: relative; overflow: hidden; padding: 90px 20px 70px; }
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(700px 380px at 20% 10%, rgba(34,211,238,.22), transparent 60%),
    radial-gradient(620px 360px at 85% 30%, rgba(37,99,235,.25), transparent 60%);
  filter: blur(6px);
}
.hero-inner { position: relative; z-index: 1; max-width: 900px; margin: 0 auto; text-align: center; }
.hero-eyebrow { letter-spacing: 3px; color: var(--accent); font-size: 13px; margin-bottom: 16px; }
.hero-title { font-size: 46px; font-weight: 700; line-height: 1.2; margin-bottom: 18px;
  background: linear-gradient(90deg, #fff, #7dd3fc); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero-sub { color: #cbd5e1; font-size: 18px; max-width: 720px; margin: 0 auto 28px; }
.hero-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.btn-primary, .btn-ghost {
  display: inline-block; padding: 12px 26px; border-radius: 999px; font-weight: 600; font-size: 15px;
}
.btn-primary { background: linear-gradient(90deg, var(--primary), var(--accent)); color: #04121f; }
.btn-primary:hover { color: #04121f; filter: brightness(1.08); }
.btn-ghost { border: 1px solid var(--card-border); color: #e0f2fe; }
.btn-ghost:hover { background: rgba(125,211,252,.1); color: #fff; }

.section { max-width: var(--maxw); margin: 0 auto; padding: 56px 20px; }
.section-alt { background: rgba(255,255,255,.02); border-top: 1px solid rgba(125,211,252,.08); border-bottom: 1px solid rgba(125,211,252,.08); }
.section-head { text-align: center; margin-bottom: 36px; }
.section-head h2 { font-size: 30px; font-weight: 700;
  background: linear-gradient(90deg, #fff, #7dd3fc); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.section-head p { color: var(--muted); margin-top: 8px; }

.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.product-card {
  display: block; background: var(--card); border: 1px solid var(--card-border); border-radius: var(--radius);
  padding: 22px; transition: transform .25s, box-shadow .25s, border-color .25s;
}
.product-card:hover { transform: translateY(-6px); box-shadow: 0 16px 40px rgba(14,165,233,.18); border-color: var(--accent); }
.pc-cat { font-size: 12px; color: var(--accent); letter-spacing: 1px; }
.product-card h3 { font-size: 18px; margin: 8px 0; color: #fff; }
.product-card p { color: var(--muted); font-size: 14px; min-height: 44px; }
.pc-link { color: var(--accent); font-size: 14px; font-weight: 600; }

.keyword-cloud { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.kw-chip { padding: 8px 18px; border-radius: 999px; background: rgba(34,211,238,.08);
  border: 1px solid rgba(34,211,238,.25); color: #bae6fd; font-size: 15px; }

.baseline-band { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.bl-item { background: var(--card); border: 1px solid var(--card-border); border-radius: var(--radius); padding: 22px; text-align: center; }
.bl-num { font-size: 26px; font-weight: 700; color: var(--accent); margin-bottom: 8px; }
.bl-label { color: var(--muted); font-size: 14px; }

.scenario-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.scenario-card { background: var(--card); border: 1px solid var(--card-border); border-radius: var(--radius); padding: 24px 16px; text-align: center; transition: transform .2s, border-color .2s; }
.scenario-card:hover { transform: translateY(-5px); border-color: var(--accent); }
.sc-icon { font-size: 30px; margin-bottom: 10px; }
.scenario-card h3 { font-size: 15px; color: #e0f2fe; font-weight: 600; }

.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.info-card { display: block; background: var(--card); border: 1px solid var(--card-border); border-radius: var(--radius); padding: 20px; transition: transform .2s, border-color .2s; }
.info-card:hover { transform: translateY(-4px); border-color: var(--accent); }
.card-cat { font-size: 12px; color: var(--accent); }
.card-title { font-size: 17px; color: #fff; margin: 6px 0; }
.card-desc { color: var(--muted); font-size: 14px; }
.card-meta { margin-top: 8px; font-size: 12px; color: var(--ok); }
.empty-tip, .center-cta { text-align: center; color: var(--muted); margin-top: 20px; }
.center-cta { margin-top: 28px; }

.trust-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; max-width: var(--maxw); margin: 0 auto; padding: 40px 20px 70px; }
.trust-item { text-align: center; }
.trust-num { font-size: 30px; font-weight: 700; color: var(--accent); }
.trust-label { color: var(--muted); font-size: 14px; margin-top: 6px; }

/* ---------- List pages ---------- */
.list-layout { display: grid; grid-template-columns: 240px 1fr; gap: 36px; padding-bottom: 60px; }
.cat-side { position: sticky; top: 86px; align-self: start; background: var(--card); border: 1px solid var(--card-border); border-radius: 14px; padding: 18px; }
.cat-side-title { font-size: 13px; color: var(--muted); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 12px; }
.cat-arrow { display: none; }
.category-list { list-style: none; }
.category-list li a { display: block; padding: 8px 12px; border-radius: 8px; color: var(--muted); font-size: 15px; }
.category-list li a:hover, .category-list li a.active { background: rgba(125,211,252,.1); color: #fff; }
.cat-content .list-intro { color: var(--muted); margin-bottom: 24px; }

/* ---------- Page (leaf) ---------- */
.page-wrap { padding-bottom: 60px; }
.page-content { max-width: 820px; }
.page-content h2 { font-size: 24px; font-weight: 700; margin: 30px 0 12px; border-bottom: 1px solid rgba(125,211,252,.15); padding-bottom: 8px; }
.page-content h3 { font-size: 19px; margin: 22px 0 10px; color: #e0f2fe; }
.page-content p { color: #cbd5e1; margin: 12px 0; }
.page-content ul, .page-content ol { margin: 12px 0 12px 22px; }
.center-text { text-align: center; }
.archive-list { list-style: none; }
.archive-list li { padding: 8px 0; border-bottom: 1px solid rgba(125,211,252,.08); }
.muted { color: var(--muted); font-size: 13px; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid rgba(125,211,252,.12); background: rgba(11,17,32,.6); margin-top: 40px; }
.footer-inner { max-width: var(--maxw); margin: 0 auto; padding: 40px 20px 20px; display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 30px; }
.footer-col h4 { color: #fff; margin-bottom: 12px; font-size: 16px; }
.footer-col p { color: var(--muted); font-size: 14px; }
.footer-col a { display: block; color: var(--muted); font-size: 14px; padding: 3px 0; }
.footer-col a:hover { color: var(--accent); }
.footer-bottom { max-width: var(--maxw); margin: 0 auto; padding: 16px 20px; border-top: 1px solid rgba(125,211,252,.08); color: var(--muted); font-size: 13px; text-align: center; }

/* ---------- Floating capsule ---------- */
.floating-capsule {
  position: fixed; right: 22px; bottom: 90px; z-index: 70;
  display: flex; flex-direction: column; gap: 10px; align-items: stretch;
}
.cap-btn {
  height: 40px; padding: 0 14px; border-radius: 999px;
  border: 1px solid rgba(255,255,255,.28); cursor: pointer;
  background: linear-gradient(160deg, var(--primary2), var(--primary), var(--accent));
  box-shadow: 0 10px 30px rgba(14,165,233,.4);
  color: #fff; font-size: 13px; font-weight: 600; letter-spacing: .5px;
  display: flex; align-items: center; justify-content: center; gap: 6px;
  white-space: nowrap; flex-shrink: 0;
  transition: transform .15s, box-shadow .2s, background .2s;
}
.cap-ico { font-size: 15px; line-height: 1; display: inline-flex; }
.cap-btn:hover { transform: translateY(-2px); box-shadow: 0 14px 36px rgba(14,165,233,.55); }

.weixin-modal { position: fixed; inset: 0; z-index: 90; background: rgba(4,10,20,.7); display: flex; align-items: center; justify-content: center; }
.weixin-modal[hidden] { display: none; }
.weixin-modal-box { position: relative; background: #fff; border-radius: 14px; padding: 8px; box-shadow: 0 20px 60px rgba(0,0,0,.5); }
.weixin-modal-box img { display: block; width: 300px; height: 500px; object-fit: contain; border-radius: 8px; }
.weixin-close { position: absolute; top: -14px; right: -14px; width: 34px; height: 34px; border-radius: 50%; border: none; background: #0EA5E9; color: #fff; font-size: 20px; cursor: pointer; }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .product-grid, .scenario-grid, .baseline-band, .card-grid, .trust-strip { grid-template-columns: repeat(2, 1fr); }
  .article-layout, .list-layout { grid-template-columns: 1fr; }
  .toc-aside, .cat-side { position: static; max-height: none; margin-bottom: 20px; }
  .cat-side-title, .toc-title { cursor: pointer; display: flex; justify-content: space-between; align-items: center; margin-bottom: 0; }
  .cat-side-title .cat-arrow, .toc-title .cat-arrow { display: inline-block; transition: transform .2s; }
  .toc-title { padding: 6px 4px; }
  .cat-toggle:checked ~ .toc-title { margin-bottom: 10px; }
  .cat-toggle:not(:checked) ~ .category-list,
  .cat-toggle:not(:checked) ~ .toc-list { display: none; }
  .cat-side-title[for] { padding: 6px 4px; }
  .cat-toggle:checked ~ .cat-side-title .cat-arrow,
  .cat-toggle:checked ~ .toc-title .cat-arrow { transform: rotate(180deg); }
  .cat-toggle:checked ~ .cat-side-title { margin-bottom: 12px; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .nav-links { display: none; position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 2px; background: var(--glass); backdrop-filter: blur(14px); padding: 12px; border-bottom: 1px solid var(--card-border); }
  .nav-links.open { display: flex; }
  .nav-group-menu { position: static; display: flex; border: none; background: none; padding: 0 0 0 12px; }
  .hero-title { font-size: 32px; }
  .product-grid, .scenario-grid, .baseline-band, .card-grid, .trust-strip, .footer-inner { grid-template-columns: 1fr; }
  .floating-capsule { right: 12px; }
}