:root {
  color-scheme: dark;
  --bg: #08111f;
  --card-bg: rgba(15, 23, 42, 0.78);
  --input-bg: rgba(15, 23, 42, 0.72);
  --border: rgba(148, 163, 184, 0.24);
  --text: #f8fafc;
  --text-muted: #b6c3d4;
  --primary: #7dd3fc;
  --primary-strong: #a78bfa;
  --badge-idle-bg: rgba(248, 250, 252, 0.08);
  --btn-dry-bg: rgba(125, 211, 252, 0.14);
  --output-bg: #0b1020;
  --output-text: #dbeafe;
  --shadow: 0 30px 90px rgba(0, 0, 0, 0.34);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at 12% 18%, rgba(125, 211, 252, 0.18), transparent 32%),
    radial-gradient(circle at 86% 12%, rgba(167, 139, 250, 0.22), transparent 30%),
    linear-gradient(135deg, #08111f 0%, #0f172a 58%, #111827 100%);
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 32px 0 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.site-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.site-mark {
  width: 38px;
  height: 38px;
  border-radius: 14px;
  box-shadow: 0 12px 38px rgba(125, 211, 252, 0.22);
}

.site-mark img {
  display: block;
  width: 100%;
  height: 100%;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--text-muted);
  font-size: 14px;
}

.site-nav a:hover {
  color: var(--text);
}

.knowledge-page {
  width: calc(100% - 24px);
  min-height: calc(100vh - 122px);
  margin: 0 12px 24px;
  border: 1px solid var(--border);
  border-radius: 26px;
  overflow: hidden;
  background: rgba(8, 17, 31, 0.72);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.loading,
.knowledge-error {
  padding: 32px;
  color: var(--text-muted);
}

.knowledge-shell {
  min-height: calc(100vh - 122px);
  display: grid;
  grid-template-columns: minmax(260px, 320px) minmax(0, 1fr);
}

.knowledge-outline-panel {
  min-height: 0;
  max-height: calc(100vh - 122px);
  overflow-y: auto;
  background: rgba(15, 23, 42, 0.88);
  border-right: 1px solid var(--border);
  padding: 20px 16px 28px;
}

.knowledge-outline-panel::-webkit-scrollbar,
.knowledge-document::-webkit-scrollbar {
  width: 6px;
}

.knowledge-outline-panel::-webkit-scrollbar-thumb,
.knowledge-document::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}

.knowledge-panel-title {
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 8px;
}

.knowledge-panel-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}

.knowledge-panel-meta span {
  font-size: 11px;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px 8px;
  background: var(--badge-idle-bg);
  white-space: nowrap;
}

.knowledge-search {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 10px;
}

.knowledge-search span,
.knowledge-outline-default-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-muted);
}

.knowledge-search input {
  width: 100%;
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--input-bg);
  color: var(--text);
  font: inherit;
  font-size: 13px;
  outline: none;
}

.knowledge-search input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(125, 211, 252, 0.14);
}

.knowledge-search-result {
  min-height: 16px;
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.knowledge-outline-default {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin: 0 0 10px;
}

.knowledge-outline-default-options {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 3px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--input-bg);
}

.knowledge-outline-default-options button {
  border: none;
  background: transparent;
  color: var(--text-muted);
  border-radius: 6px;
  padding: 5px 8px;
  font: inherit;
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
}

.knowledge-outline-default-options button:hover {
  background: var(--badge-idle-bg);
  color: var(--text);
}

.knowledge-outline-default-options button.active {
  background: var(--btn-dry-bg);
  color: var(--primary);
}

.knowledge-outline {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.knowledge-outline-group.hidden {
  display: none;
}

.knowledge-outline-group-row {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  align-items: start;
  gap: 2px;
}

.knowledge-outline-group-btn {
  width: 24px;
  height: 30px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.knowledge-outline-group-btn:hover {
  background: var(--badge-idle-bg);
  color: var(--text);
}

.knowledge-outline-caret {
  font-size: 12px;
  transform: translateY(1px);
}

.knowledge-outline-children {
  display: flex;
  flex-direction: column;
  gap: 1px;
  margin: 1px 0 6px 26px;
}

.knowledge-outline-group.collapsed .knowledge-outline-children {
  display: none;
}

.knowledge-outline.searching .knowledge-outline-group.search-expanded .knowledge-outline-children {
  display: flex;
}

.knowledge-outline-link {
  display: block;
  color: var(--text-muted);
  font-size: 12px;
  line-height: 1.45;
  padding: 6px 8px;
  border-radius: 7px;
  overflow-wrap: anywhere;
  transition: background 0.12s, color 0.12s;
}

.knowledge-outline-link:hover {
  background: var(--badge-idle-bg);
  color: var(--text);
}

.knowledge-outline-link.active {
  background: var(--btn-dry-bg);
  color: var(--primary);
  font-weight: 700;
}

.knowledge-outline-link.hidden {
  display: none;
}

.knowledge-outline-link.level-1 {
  font-weight: 800;
  color: var(--text);
  margin-bottom: 6px;
}

.knowledge-outline-link.level-2 {
  padding-left: 4px;
}

.knowledge-outline-link.level-3 {
  padding-left: 8px;
  font-size: 11.5px;
}

.knowledge-outline-empty {
  color: var(--text-muted);
  font-size: 13px;
  padding: 24px;
}

.knowledge-document {
  min-width: 0;
  max-height: calc(100vh - 122px);
  overflow-y: auto;
  scroll-behavior: smooth;
  padding: 34px clamp(24px, 4vw, 64px) 72px;
}

.knowledge-doc-inner {
  max-width: 1040px;
  margin: 0 auto;
}

.knowledge-source {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.knowledge-article {
  color: var(--text);
  font-size: 15px;
  line-height: 1.78;
}

.knowledge-article h1,
.knowledge-article h2,
.knowledge-article h3,
.knowledge-article h4,
.knowledge-article h5,
.knowledge-article h6 {
  color: var(--text);
  letter-spacing: 0;
  scroll-margin-top: 24px;
}

.knowledge-article h1 {
  font-size: 30px;
  line-height: 1.25;
  margin: 0 0 18px;
}

.knowledge-article h2 {
  font-size: 21px;
  line-height: 1.35;
  margin: 42px 0 14px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
}

.knowledge-article h3 {
  font-size: 17px;
  line-height: 1.45;
  margin: 28px 0 10px;
}

.knowledge-article h4 {
  font-size: 15px;
  margin: 22px 0 8px;
}

.knowledge-article p {
  margin: 10px 0;
}

.knowledge-article a {
  color: var(--primary);
  border-bottom: 1px solid rgba(125, 211, 252, 0.45);
}

.knowledge-article a:hover {
  border-bottom-color: var(--primary);
}

.knowledge-article ul,
.knowledge-article ol {
  margin: 10px 0 14px 22px;
}

.knowledge-article li {
  margin: 5px 0;
  padding-left: 2px;
}

.knowledge-article blockquote {
  margin: 16px 0;
  padding: 10px 14px;
  border-left: 3px solid var(--primary);
  background: rgba(15, 23, 42, 0.62);
  color: var(--text-muted);
}

.knowledge-article blockquote p {
  margin: 4px 0;
}

.knowledge-article hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 24px 0;
}

.knowledge-article code {
  font-family: "SF Mono", "Fira Code", "Cascadia Code", Consolas, monospace;
  font-size: 0.92em;
  background: var(--badge-idle-bg);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 1px 5px;
}

.knowledge-article pre {
  margin: 16px 0;
  padding: 14px 16px;
  background: var(--output-bg);
  color: var(--output-text);
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: 8px;
  overflow-x: auto;
}

.knowledge-article pre code {
  background: transparent;
  border: none;
  padding: 0;
  color: inherit;
  font-size: 12.5px;
  line-height: 1.65;
}

.knowledge-article table {
  display: block;
  width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
  margin: 16px 0 22px;
  font-size: 13px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: rgba(15, 23, 42, 0.72);
}

.knowledge-article th,
.knowledge-article td {
  padding: 9px 11px;
  border-bottom: 1px solid var(--border);
  border-right: 1px solid var(--border);
  vertical-align: top;
  min-width: 120px;
}

.knowledge-article th:last-child,
.knowledge-article td:last-child {
  border-right: none;
}

.knowledge-article tr:last-child td {
  border-bottom: none;
}

.knowledge-article th {
  background: var(--badge-idle-bg);
  color: var(--text);
  font-weight: 800;
}

@media (max-width: 900px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .site-nav {
    flex-wrap: wrap;
  }

  .knowledge-page {
    width: calc(100% - 16px);
    margin: 0 8px 18px;
    border-radius: 18px;
  }

  .knowledge-shell {
    display: flex;
    flex-direction: column;
    min-height: auto;
    overflow: visible;
  }

  .knowledge-outline-panel {
    max-height: 44vh;
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding: 14px;
  }

  .knowledge-outline-default {
    align-items: stretch;
    flex-direction: column;
    gap: 6px;
  }

  .knowledge-outline-default-options {
    width: 100%;
  }

  .knowledge-outline-default-options button {
    flex: 1;
    padding: 7px 8px;
    font-size: 12px;
  }

  .knowledge-document {
    max-height: none;
    overflow: visible;
    padding: 20px 14px 42px;
  }

  .knowledge-article {
    font-size: 14px;
    line-height: 1.72;
  }

  .knowledge-article h1 {
    font-size: 23px;
  }

  .knowledge-article h2 {
    font-size: 18px;
    margin-top: 30px;
  }

  .knowledge-article h3 {
    font-size: 16px;
    margin-top: 22px;
  }
}