:root {
  --ll-bg: #f6f8fa;
  --ll-surface: #ffffff;
  --ll-text: #16202c;
  --ll-muted: #5b6b7c;
  --ll-border: #d7dee6;
  --ll-accent: #0f7a4d;
  --ll-accent-strong: #0b5c3a;
  --ll-accent-soft: #e6f4ec;
  --ll-warn: #9a6700;
  --ll-warn-soft: #fff8e5;
  --ll-error: #b3261e;
  --ll-error-soft: #fdecea;
  --ll-ok: #0f7a4d;
  --ll-ok-soft: #e6f4ec;
  --ll-radius: 10px;
  --ll-shadow: 0 1px 2px rgba(16, 32, 48, 0.06), 0 8px 24px rgba(16, 32, 48, 0.05);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ll-text);
  background: var(--ll-bg);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  font-size: 16px;
  line-height: 1.65;
}

a { color: var(--ll-accent); }
a:hover { color: var(--ll-accent-strong); }
code { background: #eef2f6; border-radius: 4px; padding: 0.1em 0.35em; font-size: 0.92em; }

.ll-skip { position: absolute; left: -9999px; top: 0; background: var(--ll-surface); padding: 0.5rem 1rem; z-index: 100; }
.ll-skip:focus { left: 0; }

.ll-container { max-width: 76rem; margin: 0 auto; padding: 0 1.25rem; }

.ll-header {
  position: sticky; top: 0; z-index: 30;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--ll-border);
}
.ll-header-inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 56px; }
.ll-brand { display: inline-flex; align-items: center; gap: 0.45rem; font-weight: 800; font-size: 1.15rem; text-decoration: none; color: var(--ll-text); letter-spacing: 0.01em; }
.ll-logo { display: block; width: 26px; height: 26px; border-radius: 7px; }
.ll-brand span { color: var(--ll-accent); }
.ll-nav { display: flex; flex-wrap: wrap; gap: 0.25rem 1rem; font-size: 0.9rem; }
.ll-nav a { text-decoration: none; color: var(--ll-muted); padding: 0.25rem 0; }
.ll-nav a:hover { color: var(--ll-text); }

.ll-main { padding-bottom: 4rem; }

/* Hero / list */
.ll-hero { background: linear-gradient(160deg, #0d3b2a 0%, #0f7a4d 60%, #17915d 100%); color: #f2fbf6; padding: 3.25rem 0 3rem; margin-bottom: 2rem; }
.ll-hero h1 { margin: 0 0 0.75rem; font-size: clamp(1.6rem, 4vw, 2.4rem); letter-spacing: 0.01em; }
.ll-hero p { margin: 0; max-width: 48rem; color: #d9f2e5; }
.ll-howto, .ll-group, .ll-related, .ll-cta, .ll-datasets { margin-top: 2.25rem; }
.ll-howto h2, .ll-group h2, .ll-related h2, .ll-cta h2, .ll-datasets h2 { font-size: 1.25rem; margin: 0 0 0.9rem; }
.ll-howto ol { margin: 0 0 0.75rem; padding-left: 1.4rem; }
.ll-note { color: var(--ll-muted); font-size: 0.92rem; }
.ll-hero-link { margin-top: 1rem !important; }
.ll-hero-link a { color: #d9f2e5; text-decoration: underline; text-underline-offset: 3px; }
.ll-howto ul { margin: 0 0 0.75rem; padding-left: 1.4rem; }
.ll-tag-multi { background: #e8effc; color: #1e4b8f; }
.ll-count { color: var(--ll-muted); font-size: 0.9rem; font-weight: 500; }

.ll-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(19rem, 1fr)); gap: 1rem; }
.ll-card { background: var(--ll-surface); border: 1px solid var(--ll-border); border-radius: var(--ll-radius); box-shadow: var(--ll-shadow); }
.ll-card-link { display: block; padding: 1.1rem 1.2rem 1.15rem; text-decoration: none; color: inherit; height: 100%; }
.ll-card-link h3 { margin: 0 0 0.4rem; font-size: 1.05rem; color: var(--ll-text); }
.ll-card-link p { margin: 0 0 0.75rem; color: var(--ll-muted); font-size: 0.92rem; }
.ll-card-meta { display: flex; flex-wrap: wrap; gap: 0.35rem; }
.ll-empty-state { color: var(--ll-muted); padding: 2rem 0; }

.ll-tag { display: inline-block; font-size: 0.76rem; line-height: 1.5; padding: 0.05rem 0.5rem; border-radius: 999px; background: var(--ll-accent-soft); color: var(--ll-accent-strong); white-space: nowrap; }
.ll-tag-muted { background: #eef2f6; color: var(--ll-muted); }
.ll-tag-plain { background: transparent; border: 1px solid var(--ll-border); color: var(--ll-muted); }
.ll-tag-kind { margin-left: 0.5rem; vertical-align: middle; }

/* Detail head */
.ll-breadcrumb { display: flex; gap: 0.5rem; color: var(--ll-muted); font-size: 0.88rem; padding-top: 1.5rem; }
.ll-breadcrumb a { text-decoration: none; }
.ll-example-head h1 { margin: 0.6rem 0 0.5rem; font-size: clamp(1.5rem, 3.4vw, 2.1rem); }
.ll-summary { margin: 0 0 0.85rem; color: var(--ll-muted); max-width: 52rem; }
.ll-example-meta { display: flex; flex-wrap: wrap; gap: 0.35rem; margin-bottom: 0.6rem; }
.ll-source { color: var(--ll-muted); font-size: 0.88rem; margin: 0; }

/* Import panel */
.ll-import { margin-top: 1.75rem; background: var(--ll-surface); border: 1px solid var(--ll-border); border-radius: var(--ll-radius); padding: 1.25rem 1.35rem; box-shadow: var(--ll-shadow); }
.ll-import-head h2 { margin: 0 0 0.35rem; font-size: 1.15rem; }
.ll-import-head p { margin: 0 0 1rem; color: var(--ll-muted); font-size: 0.94rem; }
.ll-import-bar { display: flex; flex-wrap: wrap; align-items: center; gap: 0.6rem; }
.ll-base { color: var(--ll-muted); font-size: 0.85rem; }

.ll-btn { appearance: none; border: 1px solid var(--ll-border); background: var(--ll-surface); color: var(--ll-text); border-radius: 8px; padding: 0.5rem 1rem; font-size: 0.95rem; font-family: inherit; cursor: pointer; }
.ll-btn:hover { border-color: #b9c5d1; }
.ll-btn-primary { background: var(--ll-accent); border-color: var(--ll-accent); color: #fff; font-weight: 600; }
.ll-btn-primary:hover { background: var(--ll-accent-strong); border-color: var(--ll-accent-strong); }
.ll-btn:disabled { opacity: 0.55; cursor: not-allowed; }

.ll-status { margin-top: 1rem; font-size: 0.93rem; }
.ll-status:empty { display: none; }
.ll-status.is-busy, .ll-status.is-ok, .ll-status.is-warn, .ll-status.is-error { border-radius: 8px; padding: 0.85rem 1rem; }
.ll-status.is-busy { background: #eef4fb; }
.ll-status.is-ok { background: var(--ll-ok-soft); }
.ll-status.is-warn { background: var(--ll-warn-soft); color: #6b4b00; }
.ll-status.is-error { background: var(--ll-error-soft); color: var(--ll-error); }
.ll-status ol { margin: 0.5rem 0; padding-left: 1.3rem; }
.ll-status ul { margin: 0.5rem 0; padding-left: 1.2rem; }
.ll-status .ll-btn { margin-top: 0.5rem; }

.ll-preflight { max-height: 15rem; overflow: auto; margin: 0.5rem 0; border: 1px solid var(--ll-border); border-radius: 8px; }
.ll-check { display: flex; gap: 0.5rem; align-items: center; margin: 0.5rem 0; }

.ll-dialog { border: 1px solid var(--ll-border); border-radius: var(--ll-radius); padding: 0; max-width: 32rem; width: calc(100vw - 2rem); box-shadow: var(--ll-shadow); }
.ll-dialog::backdrop { background: rgba(10, 20, 30, 0.45); }
.ll-dialog-form { padding: 1.25rem 1.35rem; margin: 0; }
.ll-dialog-form h3 { margin: 0 0 0.75rem; }
.ll-dialog-form label { display: block; font-size: 0.88rem; color: var(--ll-muted); margin-bottom: 0.3rem; }
.ll-dialog-form input[type="url"], .ll-dialog-form input[type="password"], .ll-dialog-form input[type="text"] { width: 100%; padding: 0.5rem 0.65rem; border: 1px solid var(--ll-border); border-radius: 8px; font-size: 0.95rem; font-family: inherit; }
.ll-dialog-form label + input { margin-bottom: 0.25rem; }
.ll-dialog-hint { color: var(--ll-muted); font-size: 0.84rem; }
.ll-dialog-actions { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.9rem; }

/* Blocks / networks */
.ll-toc { margin-top: 2rem; background: var(--ll-surface); border: 1px solid var(--ll-border); border-radius: var(--ll-radius); padding: 1rem 1.25rem; }
.ll-toc h2 { margin: 0 0 0.5rem; font-size: 1rem; }
.ll-toc ul { margin: 0; padding-left: 1.2rem; }
.ll-toc > ul > li { margin: 0.25rem 0; font-weight: 600; }
.ll-toc li ul { font-weight: 400; }

.ll-blocks { margin-top: 1rem; }
.ll-block { margin-top: 2.25rem; }
.ll-block-title { font-size: 1.3rem; margin: 0 0 0.5rem; scroll-margin-top: 4.5rem; }
.ll-network { background: var(--ll-surface); border: 1px solid var(--ll-border); border-radius: var(--ll-radius); padding: 1rem 1.25rem 1.15rem; margin: 1rem 0 1.25rem; box-shadow: var(--ll-shadow); }
.ll-network-title { margin: 0 0 0.6rem; font-size: 1rem; color: var(--ll-muted); scroll-margin-top: 4.5rem; }
.ll-network { scroll-margin-top: 4.5rem; }
.ll-svg { overflow-x: auto; padding-bottom: 0.4rem; }
.ll-svg svg, .ll-svg img { display: block; max-width: none; border: 0; background: #fff; }
.ll-code { margin: 0.6rem 0; border: 1px solid var(--ll-border); border-radius: 8px; overflow: hidden; background: #f8fafc; }
.ll-code-head { display: flex; align-items: center; justify-content: space-between; gap: 0.5rem; padding: 0.35rem 0.7rem; background: #eef2f6; border-bottom: 1px solid var(--ll-border); font-size: 0.78rem; color: var(--ll-muted); }
.ll-code-lang { font-weight: 700; letter-spacing: 0.08em; }
.ll-copy { appearance: none; border: 1px solid var(--ll-border); background: #fff; color: var(--ll-text); border-radius: 6px; padding: 0.15rem 0.55rem; font-size: 0.75rem; font-family: inherit; cursor: pointer; }
.ll-copy:hover { border-color: #b9c5d1; }
.ll-scl { margin: 0; padding: 0.55rem 0; overflow-x: auto; background: #f8fafc; border: 0; border-radius: 0; font-size: 0.9rem; }
.ll-scl code { display: block; min-width: max-content; }
.ll-scl-line { display: flex; min-height: 1.55em; }
.ll-scl-num { flex: 0 0 2.8rem; padding-right: 0.7rem; text-align: right; color: #94a3b8; user-select: none; position: sticky; left: 0; background: #f8fafc; }
.ll-scl-code { white-space: pre; padding-right: 1rem; }
.ll-tok-keyword { color: #0b5c3a; font-weight: 600; }
.ll-tok-type { color: #7c3aed; }
.ll-tok-comment { color: #6b7280; font-style: italic; }
.ll-tok-string { color: #b45309; }
.ll-tok-number { color: #b91c1c; }
.ll-tok-op { color: #1d4ed8; }
.ll-tok-tag { color: #0f766e; }
.ll-tok-local { color: #7c2d12; }
.ll-prose { margin-top: 0.85rem; border-top: 1px dashed var(--ll-border); padding-top: 0.75rem; }
.ll-prose p { margin: 0.5rem 0; }
.ll-prose ul, .ll-prose ol { margin: 0.5rem 0; padding-left: 1.4rem; }
.ll-empty { color: var(--ll-muted); font-style: italic; }

/* Tables */
.ll-interface-wrap { overflow-x: auto; margin: 0.6rem 0; }
.ll-table { border-collapse: collapse; width: 100%; background: #fff; font-size: 0.9rem; }
.ll-table th, .ll-table td { border: 1px solid var(--ll-border); padding: 0.35rem 0.6rem; text-align: left; vertical-align: top; }
.ll-table thead th, .ll-table .ll-section th { background: #f0f4f8; font-weight: 600; }
.ll-tags td:first-child, .ll-tags td:nth-child(2) { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; }
.ll-flags { display: block; color: var(--ll-muted); font-size: 0.8rem; }
.ll-dataset-title { font-size: 1rem; margin: 1.25rem 0 0.35rem; scroll-margin-top: 4.5rem; }
.ll-data-anchor, #system-dbs, #datasets { scroll-margin-top: 4.5rem; }
.ll-data { margin: 0.6rem 0; }
.ll-data summary { cursor: pointer; font-weight: 600; }
.ll-data-list { margin-top: 0.5rem; }

/* Intro / named prose sections / related / CTA */
.ll-intro { margin-top: 1.75rem; max-width: 56rem; }
.ll-named { margin-top: 2.25rem; scroll-margin-top: 4.5rem; }
.ll-named h2 { font-size: 1.25rem; margin: 0 0 0.75rem; }
.ll-prose table { border-collapse: collapse; width: 100%; margin: 0.75rem 0; font-size: 0.92rem; background: #fff; }
.ll-prose th, .ll-prose td { border: 1px solid var(--ll-border); padding: 0.35rem 0.6rem; text-align: left; vertical-align: top; }
.ll-prose thead th { background: #f0f4f8; font-weight: 600; }
.ll-prose blockquote { margin: 0.75rem 0; padding: 0.5rem 0.9rem; border-left: 3px solid var(--ll-accent); background: var(--ll-accent-soft); color: #274a38; }
.ll-cta-links { display: flex; flex-wrap: wrap; gap: 0.6rem 1.25rem; }
.ll-cta-links a { font-weight: 600; text-decoration: none; }

/* Footer */
.ll-footer { border-top: 1px solid var(--ll-border); background: #fff; padding: 1.75rem 0 2rem; margin-top: 2rem; }
.ll-footer-title { margin: 0 0 0.5rem; font-weight: 700; }
.ll-footer-links { display: flex; flex-wrap: wrap; gap: 0.5rem 1.25rem; margin-bottom: 0.75rem; }
.ll-footer-links a { text-decoration: none; }
.ll-footer-note { color: var(--ll-muted); font-size: 0.85rem; margin: 0; }

@media (max-width: 640px) {
  .ll-nav { display: none; }
  .ll-import { padding: 1rem; }
  .ll-network { padding: 0.85rem 0.9rem 1rem; }
}