:root {
  --svc-ink: #0B1220;
  --svc-ink-2: #111C2E;
  --svc-teal: #17B3A3;
  --svc-teal-d: #0E8C80;
  --svc-coral: #FF7A59;
  --svc-bg: #F5F8FB;
  --svc-card: #FFFFFF;
  --svc-text: #0F1B2D;
  --svc-muted: #5A6B7B;
  --svc-line: #D7E0EA;
  --svc-border-strong: #cbd5e1;
  --svc-radius: 14px;
  --h2-inset: 0px;
  --nav-h: 60px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--svc-text);
  background: var(--svc-bg);
  line-height: 1.75;
  font-size: 16px;
}
a { color: var(--svc-teal-d); text-decoration: none; }
a:hover { color: var(--svc-coral); }

/* ---------- Header / Nav ---------- */
.svc-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: linear-gradient(120deg, var(--svc-ink), var(--svc-ink-2));
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.svc-header-inner {
  max-width: 1200px;
  margin: 0 auto;
  height: var(--nav-h);
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.svc-logo {
  color: #fff;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: .3px;
  white-space: nowrap;
}
.svc-nav-toggle {
  display: none;
  margin-left: auto;
  background: transparent;
  border: 1px solid rgba(255,255,255,.25);
  color: #fff;
  font-size: 20px;
  border-radius: 8px;
  padding: 4px 10px;
  cursor: pointer;
}
.svc-nav-menu {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 4px;
}
.svc-nav-item {
  color: #DCE6F2;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 15px;
  cursor: pointer;
}
.svc-nav-item:hover { background: rgba(255,255,255,.08); color: #fff; }
.svc-nav-group { position: relative; }
.svc-nav-group > .svc-nav-item { list-style: none; }
.svc-nav-group > summary { list-style: none; }
.svc-nav-group > summary::-webkit-details-marker { display: none; }
.svc-nav-sub {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 180px;
  background: var(--svc-ink-2);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 10px;
  padding: 6px;
  display: none;
  flex-direction: column;
  z-index: 120;
}
.svc-nav-group:hover > .svc-nav-sub,
.svc-nav-group:focus-within > .svc-nav-sub { display: flex; }
.svc-nav-sub a { color: #DCE6F2; padding: 8px 10px; border-radius: 6px; font-size: 14px; }
.svc-nav-sub a:hover { background: rgba(255,255,255,.08); color: #fff; }

/* ---------- Container / Breadcrumb ---------- */
.svc-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.svc-breadcrumb {
  padding: 16px 0;
  font-size: 14px;
  color: var(--svc-muted);
}
.svc-breadcrumb a { color: var(--svc-muted); }
.svc-breadcrumb a:hover { color: var(--svc-teal-d); }

/* ---------- Layout grids ---------- */
.svc-layout {
  display: grid;
  grid-template-columns: minmax(0,1fr) 240px;
  gap: 32px;
  padding-bottom: 48px;
  align-items: start;
}
.svc-list-layout {
  display: grid;
  grid-template-columns: 240px minmax(0,1fr);
  gap: 32px;
  padding-bottom: 48px;
  align-items: start;
}
.svc-content-main {
  min-width: 0;
  background: var(--svc-card);
  border: 1px solid var(--svc-line);
  border-radius: var(--svc-radius);
  padding: 32px 36px;
}
.svc-toc-aside {
  position: sticky;
  top: calc(var(--nav-h) + 16px);
  align-self: start;
}
.svc-toc-panel, .svc-cat-panel {
  background: var(--svc-card);
  border: 1px solid var(--svc-line);
  border-radius: var(--svc-radius);
  padding: 14px 16px;
}
.svc-toc-panel > summary, .svc-cat-panel > summary {
  font-weight: 700;
  cursor: pointer;
  list-style: none;
  color: var(--svc-ink);
}
.svc-toc-panel > summary::-webkit-details-marker,
.svc-cat-panel > summary::-webkit-details-marker { display: none; }
.svc-toc-list { list-style: none; margin: 10px 0 0; padding: 0; }
.svc-toc-list li { margin: 6px 0; font-size: 14px; }
.svc-toc-list a { color: var(--svc-muted); }
.svc-toc-list a:hover { color: var(--svc-teal-d); }

/* ---------- Content typography ---------- */
.svc-content-main h1 { font-size: 28px; margin: 0 0 18px; line-height: 1.35; color: var(--svc-ink); }
.svc-content-main h2 {
  font-size: 22px;
  margin: 30px 0 12px;
  padding-left: 12px;
  border-left: 4px solid var(--svc-teal);
  color: var(--svc-ink);
}
.svc-content-main h3 { font-size: 18px; margin: 22px 0 10px; color: var(--svc-ink-2); }
.svc-content-main p { margin: 12px 0; }
.svc-content-main ul, .svc-content-main ol { margin: 12px 0; padding-left: 24px; }
.svc-content-main li { margin: 6px 0; }
.svc-content-main blockquote {
  margin: 16px 0;
  padding: 12px 16px;
  background: #EAF7F5;
  border-left: 4px solid var(--svc-teal);
  border-radius: 8px;
  color: var(--svc-ink-2);
}
.svc-content-main code {
  background: #EEF2F6;
  padding: 1px 6px;
  border-radius: 5px;
  font-size: 90%;
}
.svc-content-main .tag-text {
  display: inline-block;
  background: #EAF7F5;
  color: var(--svc-teal-d);
  border-radius: 6px;
  padding: 2px 8px;
  margin: 2px 4px 2px 0;
  font-size: 13px;
}

/* ---------- Tables (M26: cover bare markdown tables) ---------- */
.svc-content-main table, table.svc-spec {
  border-collapse: collapse;
  width: 100%;
  margin: 16px 0;
  font-size: 14px;
}
.svc-content-main table th, table.svc-spec th {
  background: var(--svc-ink);
  color: #fff;
  text-align: left;
  padding: 9px 12px;
  border: 1px solid var(--svc-border-strong);
}
.svc-content-main table td, table.svc-spec td {
  padding: 8px 12px;
  border: 1px solid var(--svc-border-strong);
}
.svc-content-main table tbody tr:nth-child(even),
table.svc-spec tbody tr:nth-child(even) { background: #F3F7FA; }

/* ---------- FAQ (bare details) ---------- */
.svc-content-main details {
  margin: 12px 0;
  border: 1px solid var(--svc-line);
  border-radius: 10px;
  padding: 10px 14px;
  background: #FBFDFE;
}
.svc-content-main details > summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--svc-ink);
}
.svc-content-main details > summary::-webkit-details-marker { color: var(--svc-teal); }

/* ---------- List pages ---------- */
.svc-cat-side { align-self: start; }
.svc-category-list { list-style: none; margin: 10px 0 0; padding: 0; }
.svc-category-list li { margin: 4px 0; }
.svc-category-list a {
  display: block;
  padding: 8px 12px;
  border-radius: 8px;
  color: var(--svc-text);
  font-size: 15px;
}
.svc-category-list a:hover, .svc-category-list a.active {
  background: var(--svc-teal);
  color: #fff;
}
.svc-cat-content {
  min-width: 0;
  background: var(--svc-card);
  border: 1px solid var(--svc-line);
  border-radius: var(--svc-radius);
  padding: 28px 32px;
}
.svc-list-h1 { font-size: 26px; margin: 0 0 10px; color: var(--svc-ink); }
.svc-list-intro { color: var(--svc-muted); margin: 0 0 18px; }
.svc-item-list { list-style: none; margin: 0; padding: 0; }
.svc-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--svc-line);
}
.svc-item:last-child { border-bottom: none; }
.svc-item-title { font-size: 18px; font-weight: 700; color: var(--svc-ink); }
.svc-item-desc { color: var(--svc-muted); margin: 6px 0 0; font-size: 14px; }

/* ---------- Pages ---------- */
.svc-page-wrap {
  background: var(--svc-card);
  border: 1px solid var(--svc-line);
  border-radius: var(--svc-radius);
  padding: 32px 36px;
  margin-bottom: 48px;
}
.svc-page-main { background: transparent; border: none; padding: 0 4px 48px; }

/* ---------- Home ---------- */
.svc-hero {
  background: linear-gradient(135deg, var(--svc-ink), var(--svc-ink-2));
  color: #fff;
  padding: 64px 0 56px;
}
.svc-hero-inner { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.svc-hero-title { font-size: 36px; margin: 0 0 16px; line-height: 1.3; }
.svc-hero-sub { font-size: 17px; color: #C9D6E4; max-width: 760px; }
.svc-hero-cta { margin-top: 24px; display: flex; gap: 14px; flex-wrap: wrap; }
.svc-btn {
  display: inline-block;
  padding: 11px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
}
.svc-btn-primary { background: var(--svc-teal); color: #04201D; }
.svc-btn-primary:hover { background: var(--svc-teal-d); color: #fff; }
.svc-btn-ghost { border: 1px solid rgba(255,255,255,.4); color: #fff; }
.svc-btn-ghost:hover { background: rgba(255,255,255,.1); color: #fff; }

.svc-section { max-width: 1200px; margin: 0 auto; padding: 44px 24px; }
.svc-section-alt { background: #EAF1F6; }
.svc-section-h2 { font-size: 24px; margin: 0 0 22px; color: var(--svc-ink); }
.svc-card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 18px;
}
.svc-card {
  display: block;
  background: var(--svc-card);
  border: 1px solid var(--svc-line);
  border-radius: var(--svc-radius);
  padding: 20px;
  transition: transform .15s, box-shadow .15s;
}
.svc-card:hover { transform: translateY(-3px); box-shadow: 0 10px 24px rgba(15,27,45,.12); color: var(--svc-text); }
.svc-card-title { font-size: 17px; margin: 0 0 8px; color: var(--svc-ink); }
.svc-card-text { font-size: 14px; color: var(--svc-muted); margin: 0; }
.svc-tag-cloud { display: flex; flex-wrap: wrap; gap: 10px; }
.svc-tag {
  background: #fff;
  border: 1px solid var(--svc-teal);
  color: var(--svc-teal-d);
  border-radius: 999px;
  padding: 7px 16px;
  font-size: 14px;
}
.svc-baseline { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.svc-baseline-item {
  background: var(--svc-card);
  border: 1px solid var(--svc-line);
  border-radius: var(--svc-radius);
  padding: 18px 20px;
}
.svc-baseline-h { font-size: 16px; margin: 0 0 8px; color: var(--svc-teal-d); }
.svc-baseline-p { margin: 0; color: var(--svc-muted); font-size: 14px; }
.svc-scenario-row { display: flex; flex-wrap: wrap; gap: 12px; }
.svc-scenario {
  background: var(--svc-ink);
  color: #fff;
  border-radius: 10px;
  padding: 10px 18px;
  font-size: 15px;
}
.svc-cta-section { text-align: center; }
.svc-cta-text { color: var(--svc-muted); font-size: 16px; }

/* ---------- Archive / 404 ---------- */
.svc-archive-h1 { font-size: 26px; color: var(--svc-ink); }
.svc-archive-h2 { font-size: 21px; margin: 26px 0 10px; color: var(--svc-ink); border-left: 4px solid var(--svc-teal); padding-left: 12px; }
.svc-archive-cat { font-size: 16px; margin: 16px 0 6px; color: var(--svc-teal-d); }
.svc-archive-list { columns: 2; column-gap: 28px; padding-left: 18px; }
.svc-archive-list li { margin: 4px 0; break-inside: avoid; }
.svc-404 { text-align: center; padding: 80px 20px; }
.svc-404-h1 { font-size: 32px; color: var(--svc-ink); }
.svc-404-p { color: var(--svc-muted); }

/* ---------- Footer ---------- */
.svc-footer { background: var(--svc-ink); color: #C9D6E4; margin-top: 40px; }
.svc-footer-inner { max-width: 1200px; margin: 0 auto; padding: 40px 24px 24px; }
.svc-footer-cols { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 24px; }
.svc-footer-col h4 { color: #fff; margin: 0 0 12px; font-size: 16px; }
.svc-footer-col p { font-size: 14px; line-height: 1.7; }
.svc-footer-col a { display: block; color: #C9D6E4; font-size: 14px; margin: 6px 0; }
.svc-footer-col a:hover { color: #fff; }
.svc-footer-bottom { border-top: 1px solid rgba(255,255,255,.08); margin-top: 24px; padding-top: 16px; font-size: 13px; color: #8FA0B2; }

/* ---------- Floating capsule ---------- */
.svc-float {
  position: fixed;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: linear-gradient(160deg, var(--svc-teal), var(--svc-coral));
  padding: 10px 8px;
  border-radius: 999px;
  box-shadow: 0 8px 24px rgba(11,18,32,.28);
}
.svc-float-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border: none;
  border-radius: 999px;
  background: rgba(255,255,255,.16);
  color: #fff;
  cursor: pointer;
  font-size: 11px;
  gap: 2px;
  transition: background .15s;
}
.svc-float-btn:hover { background: rgba(255,255,255,.32); }
.svc-float-ico { font-size: 18px; line-height: 1; }

/* ---------- Card overlay ---------- */
.svc-card-overlay {
  position: fixed;
  inset: 0;
  background: rgba(5,10,20,.66);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}
.svc-card-overlay[hidden] { display: none; }
.svc-card-box { position: relative; }
.svc-card-img { max-height: 90vh; width: auto; border-radius: 10px; box-shadow: 0 12px 40px rgba(0,0,0,.4); }
.svc-card-close {
  position: absolute;
  top: -14px;
  right: -14px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: none;
  background: #fff;
  color: var(--svc-ink);
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
}

/* ---------- Responsive (M23-10: breakpoint 1024) ---------- */
@media (max-width: 1024px) {
  .svc-nav-toggle { display: block; }
  .svc-nav-menu {
    display: none;
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--svc-ink-2);
    padding: 8px 16px 16px;
    gap: 2px;
  }
  .svc-nav-menu.svc-open { display: flex; }
  .svc-nav-group { position: static; }
  .svc-nav-sub { position: static; display: flex; background: transparent; border: none; padding-left: 12px; }
  .svc-layout, .svc-list-layout { grid-template-columns: 1fr; gap: 20px; }
  .svc-toc-aside { position: static; }
  .svc-card-grid { grid-template-columns: 1fr 1fr; }
  .svc-baseline { grid-template-columns: 1fr; }
  .svc-archive-list { columns: 1; }
  .svc-footer-cols { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .svc-card-grid { grid-template-columns: 1fr; }
  .svc-content-main { padding: 22px 18px; }
  .svc-cat-content { padding: 20px 18px; }
  .svc-hero-title { font-size: 27px; }
}