:root {
  --bg: #030712;
  --text: #e2e8f0;
  --text-main: #ffffff;
  --text-muted: #94a3b8;
  --primary: #00e5ff;
  --border: rgba(255, 255, 255, 0.1);
  --code-bg: rgba(255, 255, 255, 0.06);
  --header-h: 56px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-h);
  background: rgba(3, 7, 18, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
}

.site-header > .container {
  width: 100%;
}

.nav-wrapper {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.logo {
  font-family: "Source Han Sans", "Alibaba PuHuiTi", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 22px;
  display: flex;
  align-items: center;
  gap: 12px;
  color: inherit;
  text-decoration: none;
}

.logo-text {
  display: flex;
  align-items: baseline;
  letter-spacing: -0.02em;
}

.logo-text .brand-main {
  color: #ffffff;
  font-weight: 700;
}

.logo-text .brand-accent {
  color: #00d1e0;
  font-weight: 700;
}

.nav-links {
  display: flex;
  gap: 24px;
  list-style: none;
  font-size: 14px;
  flex-wrap: wrap;
}

.nav-links a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-main);
  opacity: 0.8;
  text-decoration: none;
  transition: opacity 0.3s, color 0.3s;
}

.nav-links a:hover {
  opacity: 1;
  color: var(--primary);
  text-decoration: none;
}

.external-link::after {
  content: "↗";
  font-size: 12px;
  line-height: 1;
  opacity: 0.65;
  transform: translateY(-1px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.external-link:hover::after {
  opacity: 1;
  transform: translateY(-2px);
}

.page {
  max-width: 1280px;
  margin: 0 auto;
  padding: 32px 24px 80px;
}

.page.catalog-wide {
  max-width: 1280px;
}

/* 案例目录矩阵网格 */
.catalog-index .article-body > ul,
.catalog-index .article-body h3 + ul {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(148px, 1fr));
  gap: 10px;
  list-style: none;
  padding-left: 0;
  margin: 0.5em 0 1.4em;
}

.catalog-index .article-body li {
  margin: 0;
}

.catalog-index .article-body li a {
  display: flex;
  align-items: center;
  min-height: 40px;
  padding: 8px 12px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 13px;
  line-height: 1.35;
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s;
}

.catalog-index .article-body li a:hover {
  background: rgba(0, 229, 255, 0.08);
  border-color: rgba(0, 229, 255, 0.35);
  text-decoration: none;
}

.catalog-index .article-body li a[href$="/index.html"] {
  grid-column: 1 / -1;
  justify-content: center;
  font-weight: 600;
  color: #fff;
  background: rgba(0, 229, 255, 0.06);
}

@media (max-width: 640px) {
  .catalog-index .article-body > ul,
  .catalog-index .article-body h3 + ul {
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 8px;
  }
}

.breadcrumb {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
}

.breadcrumb li + li::before {
  content: "›";
  margin-right: 6px;
  color: #64748b;
}

.breadcrumb a { color: var(--text-muted); }

.article-header { margin-bottom: 32px; }

.article-header h1 {
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  line-height: 1.3;
  color: #fff;
  margin-bottom: 12px;
}

.article-meta {
  font-size: 14px;
  color: var(--text-muted);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.article-meta .tag {
  background: rgba(0, 229, 255, 0.1);
  color: var(--primary);
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12px;
}

.demo-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 20px;
  padding: 10px 20px;
  background: rgba(0, 229, 255, 0.12);
  border: 1px solid rgba(0, 229, 255, 0.35);
  border-radius: 8px;
  color: var(--primary);
  font-weight: 600;
  font-size: 14px;
}

.demo-cta:hover { background: rgba(0, 229, 255, 0.2); text-decoration: none; }

.article-body h2 {
  font-size: 1.35rem;
  color: #fff;
  margin: 2.2em 0 0.8em;
  padding-bottom: 0.4em;
  border-bottom: 1px solid var(--border);
}

.article-body h3 {
  font-size: 1.1rem;
  color: #f1f5f9;
  margin: 1.6em 0 0.6em;
}

.article-body h4 { font-size: 1rem; color: #cbd5e1; margin: 1.2em 0 0.5em; }

.article-body p { margin: 0.9em 0; }

.article-body ul, .article-body ol {
  margin: 0.9em 0;
  padding-left: 1.5em;
}

.article-body li { margin: 0.35em 0; }

.article-body blockquote {
  margin: 1.2em 0;
  padding: 12px 16px;
  border-left: 3px solid var(--primary);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-muted);
}

.article-body img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin: 1.2em 0;
  border: 1px solid var(--border);
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.2em 0;
  font-size: 14px;
  overflow-x: auto;
  display: block;
}

.article-body th, .article-body td {
  border: 1px solid var(--border);
  padding: 8px 12px;
  text-align: left;
}

.article-body th { background: rgba(255, 255, 255, 0.05); color: #fff; }

.article-body pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  overflow-x: auto;
  margin: 1.2em 0;
  font-size: 13px;
  line-height: 1.6;
}

.article-body code {
  font-family: ui-monospace, "Cascadia Code", "Fira Code", monospace;
  font-size: 0.9em;
}

.article-body :not(pre) > code {
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 4px;
}

.article-body hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2em 0;
}

.article-footer {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 14px;
  color: var(--text-muted);
}

.article-footer nav { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 12px; }

.site-footer {
  text-align: center;
  padding: 24px 20px;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 13px;
}

@media (max-width: 640px) {
  .nav-links { display: none; }
}