/* 魔思云物联 · 官网样式（与后端同进程，无构建步骤；体积 < 10KB） */
:root {
  --bg: #ffffff;
  --bg-soft: #f8fafc;
  --bg-card: #ffffff;
  --fg: #0f172a;
  --fg-muted: #64748b;
  --fg-subtle: #94a3b8;
  --brand: #2563eb;
  --brand-strong: #1d4ed8;
  --brand-soft: #eff6ff;
  --border: #e2e8f0;
  --border-strong: #cbd5e1;
  --success: #16a34a;
  --warn: #d97706;
  --danger: #dc2626;
  --radius: 12px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 48px rgba(15, 23, 42, 0.12);
  --dark: #0b1226;
  --dark-2: #111c3a;
  --dark-fg: #e6ecf7;
  --dark-muted: #9fb0d0;
  --hero-glow: rgba(96, 165, 250, 0.35);
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue",
    "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", Arial, sans-serif;
  color: var(--fg);
  background: var(--bg);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
.container-x {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}
.narrow { max-width: 640px; }
.text-center { text-align: center; }

/* ─── 头部 ─── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--border);
}
.nav-wrap {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 64px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  color: var(--fg);
}
.brand:hover { text-decoration: none; }
.brand-logo {
  display: inline-grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--brand);
  color: white;
  font-weight: 800;
}
.brand-img { width: 32px; height: 32px; border-radius: 8px; object-fit: contain; display: block; }
.brand-name { font-size: 18px; }
.primary-nav {
  display: flex;
  gap: 20px;
  margin-left: 24px;
  flex: 1;
  flex-wrap: wrap;
}
.primary-nav a {
  color: var(--fg-muted);
  font-size: 14px;
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
}
.primary-nav a[aria-current="page"] {
  color: var(--fg);
  border-bottom-color: var(--brand);
}
.primary-nav a.nav-cta {
  color: white;
  background: var(--brand);
  border-radius: 999px;
  padding: 7px 16px;
  font-weight: 600;
  border-bottom: none;
}
.primary-nav a.nav-cta:hover { background: var(--brand-strong); color: white; }
.nav-tools { display: flex; gap: 12px; }
.lang-toggle {
  display: inline-block;
  padding: 6px 12px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  color: var(--fg-muted);
  font-size: 13px;
}
.lang-toggle:hover { color: var(--brand); text-decoration: none; border-color: var(--brand); }

/* ─── 主体 ─── */
.site-main { min-height: 60vh; }
.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(900px 420px at 50% -120px, var(--hero-glow), transparent 70%),
    linear-gradient(180deg, var(--dark-2) 0%, var(--dark) 100%);
  padding: 96px 0 88px;
  text-align: center;
}
.hero::before, .hero::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: .5;
}
.hero::before { width: 320px; height: 320px; left: -80px; top: 40px; background: rgba(37, 99, 235, .45); }
.hero::after { width: 360px; height: 360px; right: -100px; bottom: -60px; background: rgba(14, 165, 233, .35); }
.hero-inner { position: relative; z-index: 1; }
.hero-badge {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid rgba(159, 176, 208, .35);
  color: var(--dark-muted);
  font-size: 12.5px;
  letter-spacing: .04em;
  margin-bottom: 24px;
  background: rgba(255, 255, 255, .04);
}
.hero-title {
  font-size: clamp(30px, 4.4vw, 52px);
  font-weight: 800;
  margin: 0 0 18px;
  letter-spacing: -0.02em;
  color: var(--dark-fg);
  line-height: 1.18;
}
.hero-subtitle {
  font-size: 17px;
  color: var(--dark-muted);
  max-width: 720px;
  margin: 0 auto 34px;
}
.hero-cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 760px;
  margin: 64px auto 0;
  padding-top: 32px;
  border-top: 1px solid rgba(159, 176, 208, .18);
}
.hero-stats div { display: flex; flex-direction: column; gap: 4px; }
.hero-stats strong { font-size: clamp(22px, 2.4vw, 30px); color: var(--dark-fg); font-weight: 800; }
.hero-stats span { font-size: 13px; color: var(--dark-muted); }

/* ─── 区块 / 标题 ─── */
.section { padding: 72px 0; }
.section + .section { padding-top: 40px; }
.section-alt { background: var(--bg-soft); }
.more-link { text-align: center; margin: 32px 0 0; font-weight: 600; }
.page-title {
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 800;
  margin: 0 0 8px;
}
.section-title {
  font-size: 24px;
  font-weight: 700;
  text-align: center;
  margin: 0 0 12px;
}
.section-sub {
  text-align: center;
  color: var(--fg-muted);
  margin: 0 auto 32px;
  max-width: 720px;
}

/* ─── 网格 / 卡片 ─── */
.grid-2 { display: grid; gap: 20px; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.grid-3 { display: grid; gap: 20px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid-4 { display: grid; gap: 20px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: var(--shadow-sm);
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--border-strong); }

/* 能力卡片图标 */
.feature-ic {
  display: inline-grid;
  place-items: center;
  width: 46px; height: 46px;
  border-radius: 12px;
  background: var(--brand-soft);
  color: var(--brand);
  margin-bottom: 14px;
}
.feature-ic svg { width: 24px; height: 24px; }
.feature-card h3 { font-size: 17px; }

/* 多端卡片 */
.terminal-card { display: flex; flex-direction: column; align-items: flex-start; }
.terminal-card h3 { margin-top: 0; }
.card-go { font-weight: 600; font-size: 14px; margin-top: auto; padding-top: 12px; }
.card-btn { margin-top: 14px; }
.console-hint { color: var(--fg-subtle); font-size: 13px; margin-top: 28px; }

/* 解决方案要点 */
.point-list { margin: 14px 0 0; padding-left: 18px; color: var(--fg-muted); font-size: 14px; }
.point-list li { margin: 6px 0; }

/* 接入步骤 */
.steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
}
.steps li {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}
.step-num {
  display: inline-grid;
  place-items: center;
  width: 34px; height: 34px;
  border-radius: 50%;
  background: var(--brand);
  color: white;
  font-weight: 700;
  margin-bottom: 12px;
}
.steps h3 { margin: 0 0 6px; font-size: 16px; }
.steps p { margin: 0; color: var(--fg-muted); font-size: 14px; }
.card-idx {
  display: inline-grid;
  place-items: center;
  width: 40px; height: 40px;
  border-radius: 10px;
  background: var(--brand-soft);
  color: var(--brand);
  font-weight: 700;
  margin-bottom: 12px;
}
.card h3 { margin: 0 0 8px; font-size: 17px; }
.card p { margin: 0; color: var(--fg-muted); font-size: 14px; }

.case-card { padding: 0; overflow: hidden; }
.case-cover {
  display: block;
  width: 100%; height: 160px;
  object-fit: cover;
  background: var(--bg-soft);
}
.case-card h3, .case-card p, .case-card .tag {
  padding: 0 20px;
}
.case-card .tag {
  display: inline-block;
  margin: 16px 20px 0;
  padding: 4px 10px;
  background: var(--brand-soft);
  color: var(--brand);
  border-radius: 999px;
  font-size: 12px;
}
.case-card h3 { margin-top: 12px; font-size: 17px; }
.case-card p { color: var(--fg-muted); font-size: 14px; padding-bottom: 20px; }

/* ─── 按钮 ─── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform .12s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--brand); color: white; }
.btn-primary:hover { background: var(--brand-strong); }
.btn-ghost { background: white; color: var(--fg); border-color: var(--border-strong); }
.btn-light { background: white; color: var(--dark); }
.btn-light:hover { background: #eef2ff; }
.btn-outline-light { background: transparent; color: var(--dark-fg); border-color: rgba(159, 176, 208, .55); }
.btn-outline-light:hover { background: rgba(255, 255, 255, .08); }

/* ─── 底部 CTA 横幅 ─── */
.cta-band {
  padding: 80px 0;
  background:
    radial-gradient(700px 300px at 50% -80px, var(--hero-glow), transparent 70%),
    linear-gradient(180deg, var(--dark-2), var(--dark));
}
.cta-band h2 { color: var(--dark-fg); font-size: clamp(24px, 3vw, 34px); margin: 0 0 12px; font-weight: 800; }
.cta-band p { color: var(--dark-muted); margin: 0 0 28px; }

/* ─── 列表 ─── */
.doc-list, .blog-list { list-style: none; padding: 0; margin: 0; }
.doc-item, .blog-item {
  border-bottom: 1px solid var(--border);
}
.doc-link, .blog-link {
  display: flex;
  gap: 16px;
  padding: 18px 0;
  color: var(--fg);
  align-items: center;
}
.doc-link:hover, .blog-link:hover { text-decoration: none; color: var(--brand); }
.doc-cat, .blog-cat {
  flex: 0 0 auto;
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--bg-soft);
  color: var(--fg-muted);
  border: 1px solid var(--border);
}
.doc-title, .blog-link h3 { font-size: 16px; margin: 0; font-weight: 600; }
.blog-link { display: block; }
.blog-link p { color: var(--fg-muted); margin: 8px 0; font-size: 14px; }
.blog-date { font-size: 12px; color: var(--fg-subtle); }
.empty { color: var(--fg-muted); text-align: center; padding: 40px 0; }

/* ─── FAQ ─── */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 8px;
}
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.faq-item[open] { border-color: var(--brand); }
.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 20px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 600;
}
.faq-q::-webkit-details-marker { display: none; }
.faq-q:hover { color: var(--brand); }
.faq-q-icon {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  transition: transform 0.2s ease;
}
.faq-item[open] .faq-q-icon { transform: rotate(-135deg); }
.faq-a {
  padding: 0 20px 18px;
  color: var(--fg-muted);
  font-size: 14px;
  line-height: 1.7;
  white-space: pre-wrap;
}
.faq-contact-hint {
  margin-top: 28px;
  text-align: center;
  color: var(--fg-muted);
  font-size: 14px;
}
.faq-contact-hint a { color: var(--brand); font-weight: 600; }

/* ─── 详情页 ─── */
.back-link { color: var(--fg-muted); font-size: 14px; }
.prose { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 32px; margin-top: 24px; }
.doc-header, .blog-header { border-bottom: 1px solid var(--border); padding-bottom: 16px; margin-bottom: 16px; }
.doc-meta, .blog-meta { color: var(--fg-subtle); font-size: 13px; margin: 4px 0 0; }
.doc-content, .blog-content {
  background: var(--bg-soft);
  border-radius: 8px;
  padding: 16px;
  font-size: 13px;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

/* ─── 文档站布局（/docs 与 /docs/{slug} 共享） ─── */
.docs-section { padding-top: 56px; }
.docs-layout {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 36px;
  align-items: start;
}
.docs-side {
  position: sticky;
  top: 80px;
  align-self: start;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow-sm);
  max-height: calc(100vh - 100px);
  overflow: auto;
}
.docs-side-toggle { display: block; }
.docs-side-title {
  list-style: none;
  cursor: pointer;
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fg-muted);
  padding: 4px 8px 12px;
  display: block;
}
.docs-side-toggle > summary::-webkit-details-marker { display: none; }
.docs-side-toggle > summary::before {
  content: "▾";
  display: inline-block;
  margin-right: 6px;
  transition: transform .15s ease;
}
.docs-side-toggle:not([open]) > summary::before { transform: rotate(-90deg); }
.docs-side-nav { display: flex; flex-direction: column; gap: 2px; padding: 0; margin: 0; }
.docs-side-link, .docs-side-nav a {
  display: block;
  padding: 7px 10px;
  border-radius: 6px;
  color: var(--fg);
  font-size: 13.5px;
  line-height: 1.45;
  border-left: 2px solid transparent;
}
.docs-side-link:hover, .docs-side-nav a:hover {
  text-decoration: none;
  background: var(--bg-soft);
  color: var(--brand);
}
.docs-side-nav .toc { padding: 0; margin: 0; }
.docs-side-nav .toc ul { padding-left: 14px; list-style: none; margin: 4px 0; }
.docs-side-nav .toc li { margin: 2px 0; }
.docs-side-nav .toc a {
  display: block;
  padding: 5px 8px;
  font-size: 13px;
  color: var(--fg-muted);
  border-left: 2px solid transparent;
  border-radius: 0 6px 6px 0;
  line-height: 1.45;
}
.docs-side-nav .toc a:hover { color: var(--brand); background: transparent; }
.docs-side-nav .toc a:hover { border-left-color: var(--brand); }
.docs-side-empty { color: var(--fg-subtle); font-size: 13px; padding: 0 8px; margin: 0; }

.docs-main { min-width: 0; }
.docs-hero { margin-bottom: 32px; }
.docs-eyebrow {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--brand);
  background: var(--brand-soft);
  padding: 4px 10px;
  border-radius: 999px;
  margin: 0 0 12px;
}
.docs-sub { text-align: left; margin-left: 0; margin-right: 0; max-width: 640px; }
.docs-hero-meta {
  display: flex;
  gap: 16px;
  align-items: center;
  margin-top: 16px;
  flex-wrap: wrap;
}
.docs-hero-count {
  color: var(--fg-subtle);
  font-size: 13px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
}
.btn-sm { padding: 6px 14px; font-size: 13px; border-radius: 8px; }

.docs-cat { margin-top: 40px; scroll-margin-top: 80px; }
.docs-cat:first-of-type { margin-top: 16px; }
.docs-cat-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 16px;
}
.docs-cat-title {
  font-size: 20px;
  font-weight: 700;
  margin: 0;
  color: var(--fg);
}
.docs-cat-count {
  font-size: 12px;
  color: var(--fg-subtle);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.docs-grid { gap: 16px; }

.doc-card {
  display: flex;
  flex-direction: column;
  padding: 20px;
  text-decoration: none;
  color: var(--fg);
  height: 100%;
}
.doc-card:hover { text-decoration: none; color: var(--fg); border-color: var(--brand); }
.doc-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 10px;
}
.doc-cat-badge {
  display: inline-block;
  font-size: 11.5px;
  padding: 3px 9px;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand);
  font-weight: 600;
  letter-spacing: 0.04em;
}
.doc-ver {
  display: inline-block;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  color: var(--fg-muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.doc-card-title {
  font-size: 16px;
  font-weight: 600;
  margin: 4px 0 8px;
  line-height: 1.4;
  color: var(--fg);
}
.doc-card-excerpt {
  font-size: 13.5px;
  color: var(--fg-muted);
  margin: 0 0 16px;
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.doc-card-foot {
  margin-top: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--fg-subtle);
  padding-top: 12px;
  border-top: 1px dashed var(--border);
}
.doc-card-go { color: var(--brand); font-weight: 600; }

/* ─── 文档详情页 ─── */
.bread {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--fg-subtle);
  margin-bottom: 18px;
}
.bread a { color: var(--fg-muted); }
.bread a:hover { color: var(--brand); text-decoration: none; }
.bread-sep { color: var(--fg-subtle); }
.bread-cur { color: var(--fg); font-weight: 600; }

.doc-article {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 44px;
  box-shadow: var(--shadow-sm);
  min-width: 0;
}
.doc-header-meta {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-bottom: 14px;
}
.doc-title {
  font-size: clamp(24px, 2.8vw, 32px);
  font-weight: 800;
  margin: 0 0 8px;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.prose-body {
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--fg);
}
.prose-body h1 { display: none; }
.prose-body h2 {
  font-size: 22px;
  font-weight: 700;
  margin: 36px 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
  scroll-margin-top: 80px;
}
.prose-body h3 {
  font-size: 18px;
  font-weight: 700;
  margin: 28px 0 10px;
  scroll-margin-top: 80px;
}
.prose-body h4 {
  font-size: 15.5px;
  font-weight: 700;
  margin: 20px 0 8px;
  color: var(--fg);
}
.prose-body p { margin: 10px 0; }
.prose-body ul, .prose-body ol { padding-left: 24px; margin: 10px 0; }
.prose-body li { margin: 4px 0; }
.prose-body a { color: var(--brand); }
.prose-body a:hover { text-decoration: underline; }
.prose-body blockquote {
  margin: 16px 0;
  padding: 10px 16px;
  border-left: 3px solid var(--brand);
  background: var(--brand-soft);
  color: var(--fg-muted);
  border-radius: 0 6px 6px 0;
}
.prose-body hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 28px 0;
}
.prose-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 14px;
}
.prose-body th, .prose-body td {
  border: 1px solid var(--border);
  padding: 8px 12px;
  text-align: left;
}
.prose-body th {
  background: var(--bg-soft);
  font-weight: 600;
}
.prose-body :not(pre) > code {
  background: #f1f5f9;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.92em;
  color: #b91c1c;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.prose-body pre {
  background: #0b1226;
  color: #e6ecf7;
  border-radius: 8px;
  padding: 16px;
  overflow-x: auto;
  margin: 16px 0;
  font-size: 13.5px;
  line-height: 1.6;
  border: 1px solid rgba(159, 176, 208, .15);
}
.prose-body pre code {
  background: transparent;
  color: inherit;
  padding: 0;
  font-size: 13.5px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.prose-body .codehilite { background: transparent; }
.prose-body .codehilite pre { margin: 0; }

/* codehilite 关键字/字符串/注释/数字/函数 配色 */
.prose-body .codehilite .k { color: #c084fc; }
.prose-body .codehilite .kn { color: #c084fc; }
.prose-body .codehilite .s, .prose-body .codehilite .s1, .prose-body .codehilite .s2 { color: #86efac; }
.prose-body .codehilite .c, .prose-body .codehilite .c1 { color: #64748b; font-style: italic; }
.prose-body .codehilite .n { color: #e6ecf7; }
.prose-body .codehilite .nb { color: #fbbf24; }
.prose-body .codehilite .nf { color: #93c5fd; }
.prose-body .codehilite .o { color: #fda4af; }
.prose-body .codehilite .mi, .prose-body .codehilite .mf { color: #fcd34d; }
.prose-body .codehilite .kc { color: #93c5fd; }
.prose-body .codehilite .kd { color: #c084fc; }

.prose-body img {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
  margin: 12px 0;
}

.doc-prev-next {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.doc-pn {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 18px;
  border: 1px solid var(--border);
  border-radius: 10px;
  text-decoration: none;
  color: var(--fg);
  transition: border-color .15s ease, transform .15s ease;
  min-width: 0;
}
.doc-pn:hover {
  text-decoration: none;
  color: var(--fg);
  border-color: var(--brand);
}
.doc-pn.doc-next { text-align: right; align-items: flex-end; }
.doc-pn-label {
  font-size: 12px;
  color: var(--fg-subtle);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.doc-pn-title {
  font-size: 14.5px;
  font-weight: 600;
  color: var(--brand);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

@media (max-width: 960px) {
  .docs-layout { grid-template-columns: 200px minmax(0, 1fr); gap: 24px; }
  .doc-article { padding: 28px; }
}
@media (max-width: 720px) {
  .docs-layout { grid-template-columns: 1fr; }
  .docs-side {
    position: static;
    max-height: none;
    margin-bottom: 16px;
  }
  .docs-side-toggle > summary { padding: 8px 10px; }
  .doc-article { padding: 22px; }
  .doc-prev-next { flex-direction: column; }
  .doc-pn.doc-next { text-align: left; align-items: flex-start; }
}

/* ─── 表单 ─── */
.form { display: flex; flex-direction: column; gap: 16px; }
.form label { display: flex; flex-direction: column; gap: 6px; font-size: 14px; color: var(--fg); }
.form input, .form textarea {
  font: inherit;
  padding: 10px 12px;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  background: white;
}
.form input:focus, .form textarea:focus { outline: 2px solid var(--brand); border-color: var(--brand); }
.form-inline { flex-direction: row; }
.form-inline input { flex: 1; }

/* ─── Flash 消息 ─── */
.flash {
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 16px;
  border: 1px solid var(--border);
}
.flash-success { background: #f0fdf4; color: #166534; border-color: #bbf7d0; }
.flash-error   { background: #fef2f2; color: #991b1b; border-color: #fecaca; }
.flash-warn    { background: #fffbeb; color: #92400e; border-color: #fde68a; }

/* ─── 页脚 ─── */
.site-footer { background: var(--dark); margin-top: 0; padding: 56px 0 24px; }
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 32px;
}
.brand-light, .brand-light .brand-name { color: var(--dark-fg); }
.brand-light:hover { text-decoration: none; }
.footer-brand .tagline { color: var(--dark-muted); font-size: 13px; margin: 14px 0 0; max-width: 280px; }
.footer-col h4 {
  color: var(--dark-fg);
  font-size: 14px;
  margin: 0 0 14px;
}
.footer-col a {
  display: block;
  color: var(--dark-muted);
  font-size: 13.5px;
  margin: 9px 0;
}
.footer-col a:hover { color: var(--dark-fg); }
.footer-email { color: var(--dark-muted); font-size: 13px; margin: 9px 0 0; }
.footer-bottom {
  border-top: 1px solid rgba(159, 176, 208, .16);
  margin-top: 40px;
  padding-top: 20px;
}
.copyright { color: var(--dark-muted); font-size: 13px; margin: 0; }

/* ─── 响应式 ─── */
@media (max-width: 860px) {
  .steps { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .nav-wrap { flex-wrap: wrap; height: auto; padding: 12px 0; }
  .primary-nav { order: 3; margin-left: 0; flex-basis: 100%; gap: 12px; }
  .hero { padding: 56px 0 48px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); margin-top: 44px; gap: 24px 16px; }
  .section { padding: 44px 0; }
  .steps { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .prose { padding: 20px; }
}