:root {
  --primary: #1a56db;
  --primary-light: #eef2ff;
  --primary-dark: #1e3a8a;
  --sidebar-bg: #ffffff;
  --sidebar-text: #475569;
  --sidebar-active: #1a56db;
  --sidebar-hover: #f8fafc;
  --bg: #ffffff;
  --card-bg: #ffffff;
  --text: #171717;
  --text-secondary: #6b7280;
  --border: #e5e7eb;
  --code-bg: #f3f4f6;
  --pre-bg: #111827;
  --tip-bg: #f0fdf4;
  --tip-border: #22c55e;
  --note-bg: #fffbeb;
  --note-border: #f59e0b;
  --warn-bg: #fef2f2;
  --warn-border: #ef4444;
  font-size: 15px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 20px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.8;
  display: flex;
  min-height: 100vh;
}

/* ===== Sidebar ===== */
.sidebar {
  position: fixed;
  top: 0; left: 0;
  width: 290px;
  height: 100vh;
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  overflow-y: auto;
  z-index: 100;
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border);
}
.sidebar-header {
  padding: 24px 20px 18px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.sidebar-header .brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.sidebar-header .brand-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--primary);
  color: #fff;
  font-size: 16px;
  font-weight: 800;
  flex-shrink: 0;
}
.sidebar-header .brand-text {
  font-size: 16px;
  color: var(--text);
  font-weight: 700;
}
.sidebar-header .version {
  font-size: 11px;
  color: var(--text-secondary);
  margin-top: 8px;
  padding-left: 42px;
  letter-spacing: 0.3px;
}
.sidebar-nav { padding: 6px 0; flex: 1; }
.sidebar-nav a {
  display: flex;
  align-items: center;
  padding: 7px 20px;
  color: var(--sidebar-text);
  text-decoration: none;
  font-size: 13px;
  transition: all 0.12s;
  border-left: 2px solid transparent;
}
.sidebar-nav a:hover {
  background: var(--sidebar-hover);
  color: var(--text);
}
.sidebar-nav a.active {
  color: var(--sidebar-active);
  background: var(--primary-light);
  border-left-color: var(--primary);
  font-weight: 600;
}
.sidebar-nav .toc-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 22px;
  height: 20px;
  margin-right: 10px;
  font-size: 10.5px;
  font-weight: 600;
  color: var(--primary);
  flex-shrink: 0;
}
.sidebar-nav a.active .toc-num { color: var(--sidebar-active); }

/* ===== Main Content ===== */
.main {
  margin-left: 290px;
  flex: 1;
  max-width: 960px;
  padding: 40px 64px 100px;
}

/* ===== Manual Index ===== */
.manual-index{max-width:720px}
.manual-index h1{font-size:clamp(1.5rem,3vw,2rem);margin-bottom:6px}
.manual-index .subtitle{color:var(--text-secondary);font-size:0.95rem;margin-bottom:32px}
.toc-list{list-style:none}
.toc-list li{border-bottom:1px solid var(--border)}
.toc-list a{
  display:flex;align-items:center;gap:12px;
  padding:14px 0;color:var(--text);text-decoration:none;
  transition:color 0.12s
}
.toc-list a:hover{color:var(--primary)}
.toc-list .toc-num{
  display:inline-flex;align-items:center;justify-content:center;
  min-width:28px;height:24px;background:var(--primary);
  color:#fff;font-size:11px;font-weight:700;flex-shrink:0
}
.toc-list .toc-title{font-weight:500}
.toc-list .toc-desc{font-size:0.82rem;color:var(--text-secondary);margin-top:1px}

/* ===== Typography ===== */
.main h2 {
  font-size: 24px;
  font-weight: 700;
  margin: 48px 0 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--primary);
  display: flex;
  align-items: center;
  gap: 10px;
}
.main h2 .section-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 32px;
  height: 26px;
  background: var(--primary);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 0 8px;
}
.main h3 {
  font-size: 19px;
  font-weight: 600;
  color: var(--text);
  margin: 30px 0 12px;
}
.main h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin: 20px 0 8px;
}
.main p {
  margin: 10px 0;
  color: var(--text);
}
.main ul, .main ol {
  margin: 8px 0 8px 24px;
}
.main li {
  margin: 5px 0;
}
.main a { color: var(--primary); text-decoration: none; }
.main a:hover { text-decoration: underline; }

/* ===== Cover ===== */
.cover {
  text-align: center;
  padding: 48px 0 36px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--border);
}
.cover .logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  background: var(--primary);
  color: #fff;
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 16px;
}
.cover h1 {
  font-size: 30px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
  letter-spacing: -0.3px;
}
.cover .subtitle {
  font-size: 15px;
  color: var(--text-secondary);
}
.cover .badge {
  display: inline-block;
  margin-top: 12px;
  padding: 4px 16px;
  border: 1px solid var(--primary);
  color: var(--primary);
  font-size: 12px;
  font-weight: 500;
}

/* ===== Tables ===== */
.main table {
  width: 100%;
  border-collapse: collapse;
  margin: 14px 0;
  font-size: 14px;
  border: 1px solid var(--border);
}
.main table thead {
  background: #f8fafc;
}
.main table th {
  padding: 10px 14px;
  text-align: left;
  font-weight: 600;
  font-size: 13px;
  color: var(--text);
  border-bottom: 2px solid var(--border);
}
.main table td {
  padding: 9px 14px;
  border-bottom: 1px solid var(--border);
}
.main table tbody tr:hover { background: var(--primary-light); }

/* ===== Code ===== */
.main pre {
  background: var(--pre-bg);
  color: #e2e8f0;
  padding: 18px 22px;
  overflow-x: auto;
  font-family: "JetBrains Mono", "Fira Code", "Cascadia Code", Consolas, monospace;
  font-size: 13px;
  line-height: 1.7;
  margin: 14px 0;
  tab-size: 2;
}
.main code:not(pre code) {
  font-family: "JetBrains Mono", "Fira Code", Consolas, monospace;
  font-size: 13px;
  background: var(--code-bg);
  padding: 2px 6px;
  color: #0c4a6e;
}
.main pre code { background: transparent; padding: 0; color: inherit; font-size: inherit; }
.main pre.ascii-box {
  background: var(--code-bg);
  color: var(--text);
  font-size: 12px;
  line-height: 1.45;
}

/* ===== Blockquote ===== */
.main blockquote {
  margin: 14px 0;
  padding: 14px 18px;
  background: var(--primary-light);
  border-left: 3px solid var(--primary);
  color: var(--text);
}
.main blockquote p { margin: 0; }

/* ===== Tip / Note / Warning ===== */
.tip, .note, .warn {
  margin: 16px 0;
  padding: 14px 18px;
  border-left: 3px solid;
  font-size: 14px;
}
.tip { background: var(--tip-bg); border-color: var(--tip-border); }
.note { background: var(--note-bg); border-color: var(--note-border); }
.warn { background: var(--warn-bg); border-color: var(--warn-border); }
.tip strong { color: #15803d; }
.note strong { color: #b45309; }
.warn strong { color: #dc2626; }

/* ===== Method tags ===== */
.method-tag {
  display: inline-block;
  padding: 1px 8px;
  font-size: 11px;
  font-weight: 700;
  font-family: monospace;
  margin-right: 4px;
}
.method-get { background: #dbeafe; color: #1d4ed8; }
.method-post { background: #d1fae5; color: #065f46; }
.method-delete { background: #fee2e2; color: #991b1b; }

/* ===== kbd ===== */
kbd {
  display: inline-block;
  padding: 2px 7px;
  font-size: 12px;
  font-family: "JetBrains Mono", "Fira Code", Consolas, monospace;
  background: #fff;
  border: 1px solid #d1d5db;
  margin: 0 2px;
  line-height: 1.4;
}

/* ===== Image placeholder ===== */
.img-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--code-bg);
  border: 1px dashed var(--border);
  padding: 36px 20px;
  margin: 16px 0;
  color: var(--text-secondary);
  font-size: 14px;
  text-align: center;
  min-height: 100px;
}

/* ===== Steps ===== */
.step-list { counter-reset: step; }
.step-item {
  counter-increment: step;
  margin: 12px 0;
  padding: 16px 20px 16px 52px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  position: relative;
}
.step-item::before {
  content: counter(step);
  position: absolute;
  left: 14px;
  top: 16px;
  width: 26px;
  height: 26px;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
}
.step-item strong { color: var(--primary-dark); }

/* ===== Language bar ===== */
.lang-bar {
  text-align: right;
  padding: 8px 0 4px;
  font-size: 13px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0;
}
.lang-bar a {
  display: inline-block;
  padding: 2px 10px;
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 12px;
  transition: color 0.12s;
}
.lang-bar a:hover { color: var(--primary); }
.lang-bar a.active { color: var(--primary); }
.lang-bar .sep { color: var(--border); font-size: 12px; }
.lang-bar .back-link { float: left; }

/* ===== Section nav ===== */
.section-nav{display:flex;justify-content:space-between;align-items:center;margin-top:48px;padding-top:20px;border-top:1px solid var(--border)}
.section-nav a{color:var(--primary);font-size:0.88rem;text-decoration:none;font-weight:500;transition:color 0.12s}
.section-nav a:hover{color:var(--primary-dark)}
.section-nav .nav-prev::before{content:"← ";font-weight:400}
.section-nav .nav-next::after{content:" →";font-weight:400}
.section-nav .nav-disabled{color:var(--border);pointer-events:none}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .sidebar { display: none !important; }
  .main {
    margin-left: 0 !important;
    padding: 24px 20px 60px;
    max-width: 100%;
  }
  .cover h1 { font-size: 24px; }
  .cover { padding: 32px 16px 24px; }
}

/* ===== Scrollbar ===== */
.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar::-webkit-scrollbar-thumb { background: #d1d5db; }