/* ==========================================================
   AnyChat 文档中心 — 专业文档站样式
   设计目标:Mintlify / Stripe Docs 级别的可读性与细节
   ========================================================== */

:root {
  --doc-max: 780px;
  --doc-radius: 14px;
  --doc-head-h: 64px;
  --doc-side-w: 264px;
  --doc-toc-w: 208px;
  --doc-code-bg: #0e1a1c;
  --doc-code-bar: #16292c;
  --doc-shadow-sm: 0 1px 2px rgba(15, 27, 29, .05);
  --doc-shadow: 0 4px 16px rgba(15, 27, 29, .07);
}

/* ---------------- 顶部阅读进度条 ---------------- */
.doc-progress {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0;
  background: var(--grad);
  z-index: 90;
  transition: width .1s linear;
}

/* ---------------- 顶部导航 ---------------- */
.docs-nav {
  position: sticky;
  top: 0;
  height: var(--doc-head-h);
  background: rgba(255, 255, 255, .86);
  backdrop-filter: saturate(170%) blur(14px);
  border-bottom: 1px solid var(--line);
  z-index: 60;
}
.docs-nav .nav-inner { height: var(--doc-head-h); }
.nav-left { display: flex; align-items: center; gap: 10px; }
.docs-tag {
  margin-left: 6px;
  padding: 2px 9px;
  border-radius: 6px;
  background: var(--brand);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.docs-menu-toggle {
  display: none;
  width: 36px; height: 36px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  cursor: pointer;
  padding: 10px 8px;
  flex-direction: column;
  justify-content: space-between;
}
.docs-menu-toggle span { display: block; height: 2px; background: var(--ink); border-radius: 2px; }

/* ---------------- 三栏骨架 ---------------- */
.docs-shell {
  display: grid;
  grid-template-columns: var(--doc-side-w) minmax(0, 1fr) var(--doc-toc-w);
  gap: 44px;
  max-width: 1360px;
  margin: 0 auto;
  padding: 28px 28px 90px;
  align-items: start;
}

/* ---------------- 侧边栏 ---------------- */
.docs-side {
  position: sticky;
  top: calc(var(--doc-head-h) + 20px);
  max-height: calc(100vh - var(--doc-head-h) - 44px);
  overflow-y: auto;
  padding-right: 6px;
  scrollbar-width: thin;
}
.docs-side::-webkit-scrollbar { width: 6px; }
.docs-side::-webkit-scrollbar-thumb { background: #dfe7e7; border-radius: 3px; }

.docs-search { position: relative; margin-bottom: 20px; }
.docs-search-icon {
  position: absolute;
  left: 12px; top: 50%;
  transform: translateY(-50%);
  color: var(--ink-3);
  font-size: 16px;
}
#docSearch {
  width: 100%;
  height: 38px;
  padding: 0 12px 0 32px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-alt);
  font-size: 14px;
  color: var(--ink);
  outline: none;
  transition: border-color .16s ease, box-shadow .16s ease, background .16s ease;
}
#docSearch:focus {
  background: #fff;
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(15, 185, 177, .14);
}

.docs-side-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--ink-3);
  margin: 0 0 10px 10px;
  text-transform: uppercase;
}
.docs-menu { display: flex; flex-direction: column; gap: 2px; }

.docs-link {
  display: block;
  padding: 8px 12px;
  border-radius: 9px;
  font-size: 14px;
  color: var(--ink-2);
  transition: background .15s ease, color .15s ease;
}
.docs-link:hover { background: var(--bg-alt); color: var(--brand-dark); }
.docs-link.active {
  background: var(--grad-soft);
  color: var(--brand-dark);
  font-weight: 600;
}

.docs-group { margin-top: 16px; }
.docs-group-title {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--ink);
  padding: 4px 12px 8px;
}
.docs-group-title::before {
  content: "";
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--ink-3);
}
.docs-group[data-version="v1"] .docs-group-title::before { background: var(--brand); }
.docs-link.hidden { display: none; }

/* ---------------- 正文区 ---------------- */
.docs-main { min-width: 0; }

.doc-crumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--ink-3);
  margin-bottom: 14px;
}
.doc-crumb a { color: var(--ink-3); }
.doc-crumb a:hover { color: var(--brand-dark); }
.doc-crumb .sep { opacity: .5; }
.doc-crumb .cur { color: var(--ink); font-weight: 600; }

.doc-body {
  max-width: var(--doc-max);
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink-2);
}
.doc-body h1 {
  font-size: 36px;
  line-height: 1.2;
  letter-spacing: -.02em;
  color: var(--ink);
  margin: 0 0 12px;
}
.doc-body h2 {
  font-size: 23px;
  letter-spacing: -.01em;
  color: var(--ink);
  margin: 44px 0 14px;
  padding-top: 4px;
  scroll-margin-top: calc(var(--doc-head-h) + 24px);
}
.doc-body h3 {
  font-size: 18px;
  color: var(--ink);
  margin: 28px 0 10px;
  scroll-margin-top: calc(var(--doc-head-h) + 24px);
}
/* 标题锚点 */
.doc-body .anchor {
  margin-left: 8px;
  color: var(--ink-3);
  opacity: 0;
  font-weight: 400;
  text-decoration: none;
  transition: opacity .15s ease;
}
.doc-body h2:hover .anchor,
.doc-body h3:hover .anchor { opacity: .55; }
.doc-body .anchor:hover { opacity: 1; color: var(--brand); }

.doc-body p { margin: 0 0 16px; }
.doc-body .lead { font-size: 17.5px; color: var(--ink-3); }
.doc-body ul, .doc-body ol { margin: 0 0 18px; padding-left: 22px; }
.doc-body li { margin-bottom: 8px; }
.doc-body li::marker { color: var(--brand); }
.doc-body strong { color: var(--ink); font-weight: 600; }
.doc-body a { color: var(--brand-dark); text-decoration: underline; text-underline-offset: 2px; }

/* 行内代码 */
.doc-body code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 13.5px;
  background: var(--bg-alt);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 1.5px 6px;
  color: #0b6e68;
}

/* ---------------- 代码块 ---------------- */
.code-block {
  margin: 0 0 22px;
  border-radius: var(--doc-radius);
  overflow: hidden;
  background: var(--doc-code-bg);
  box-shadow: var(--doc-shadow);
}
.code-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 36px;
  padding: 0 8px 0 14px;
  background: var(--doc-code-bar);
  border-bottom: 1px solid rgba(255, 255, 255, .07);
}
.code-lang {
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: #7fd6cd;
}
.code-copy {
  height: 24px;
  padding: 0 10px;
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: 6px;
  background: rgba(255, 255, 255, .06);
  color: #cfeeea;
  font-size: 12px;
  cursor: pointer;
  transition: background .15s ease, color .15s ease;
}
.code-copy:hover { background: rgba(255, 255, 255, .14); color: #fff; }
.code-copy.done { color: #7ff0e4; border-color: rgba(127, 240, 228, .5); }
.doc-body pre {
  margin: 0;
  padding: 16px 18px;
  overflow-x: auto;
  background: transparent;
  color: #d9f4f0;
  font-size: 13.5px;
  line-height: 1.72;
}
.doc-body pre code {
  background: none;
  border: none;
  padding: 0;
  color: inherit;
  font-size: inherit;
}

/* ---------------- 表格 ---------------- */
.doc-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 0 0 22px;
  font-size: 14.5px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--doc-shadow-sm);
}
.doc-table th, .doc-table td {
  padding: 11px 15px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}
.doc-table thead th,
.doc-table tr:first-child th {
  background: var(--bg-alt);
  font-weight: 700;
  color: var(--ink);
  white-space: nowrap;
}
.doc-table tbody tr:last-child td { border-bottom: none; }
.doc-table tbody tr:hover { background: #fafffe; }
.doc-table td { color: var(--ink-2); }

/* ---------------- 提示块 ---------------- */
.doc-note {
  position: relative;
  margin: 0 0 22px;
  padding: 14px 18px 14px 46px;
  border-radius: 12px;
  background: var(--grad-soft);
  border: 1px solid rgba(15, 185, 177, .22);
  color: var(--ink-2);
  font-size: 15px;
}
.doc-note::before {
  content: "i";
  position: absolute;
  left: 16px; top: 14px;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  display: grid;
  place-items: center;
}

/* ---------------- 分页导航 ---------------- */
.doc-pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  max-width: var(--doc-max);
  margin: 46px 0 0;
}
.doc-pager a {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  transition: border-color .16s ease, box-shadow .16s ease, transform .16s ease;
}
.doc-pager a:hover {
  border-color: var(--brand);
  box-shadow: var(--doc-shadow);
  transform: translateY(-2px);
}
.doc-pager .dir { font-size: 12px; color: var(--ink-3); }
.doc-pager .ttl { font-size: 15px; font-weight: 600; color: var(--ink); }
.doc-pager .next { text-align: right; align-items: flex-end; }
.doc-pager .spacer { visibility: hidden; }

.doc-updated {
  max-width: var(--doc-max);
  margin: 26px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--ink-3);
}

/* ---------------- 右侧目录 ---------------- */
.docs-toc {
  position: sticky;
  top: calc(var(--doc-head-h) + 20px);
  max-height: calc(100vh - var(--doc-head-h) - 44px);
  overflow-y: auto;
}
.docs-toc-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--ink-3);
  margin: 0 0 12px;
  text-transform: uppercase;
}
.docs-toc-list {
  display: flex;
  flex-direction: column;
  border-left: 2px solid var(--line);
}
.docs-toc-link {
  padding: 6px 0 6px 14px;
  margin-left: -2px;
  border-left: 2px solid transparent;
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--ink-3);
  transition: color .15s ease, border-color .15s ease;
}
.docs-toc-link:hover { color: var(--brand-dark); }
.docs-toc-link.active { color: var(--brand-dark); border-left-color: var(--brand); font-weight: 600; }

/* ---------------- 返回顶部 ---------------- */
.doc-totop {
  position: fixed;
  right: 26px; bottom: 26px;
  width: 42px; height: 42px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: #fff;
  color: var(--ink-2);
  font-size: 18px;
  cursor: pointer;
  box-shadow: var(--doc-shadow);
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s ease, transform .2s ease, color .2s ease, border-color .2s ease;
}
.doc-totop.show { opacity: 1; pointer-events: auto; }
.doc-totop:hover { color: var(--brand-dark); border-color: var(--brand); transform: translateY(-2px); }

/* ---------------- 暗色模式（跟随系统） ---------------- */
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e8f1f0;
    --ink-2: #b6c7c6;
    --ink-3: #8b9d9c;
    --line: #23403f;
    --bg: #0c1a1b;
    --bg-alt: #11262a;
  }
  body { background: var(--bg); }
  .docs-nav { background: rgba(12, 26, 27, .88); border-bottom-color: var(--line); }
  .brand-name, .footer-brand { color: #fff; }
  .btn-ghost { color: var(--ink-2); }
  #langSelect { background: var(--bg-alt); border-color: var(--line); color: var(--ink-2); }
  #docSearch { background: var(--bg-alt); border-color: var(--line); color: var(--ink); }
  .doc-table { background: var(--bg-alt); border-color: var(--line); }
  .doc-table thead th, .doc-table tr:first-child th { background: #16333a; color: #fff; }
  .doc-table tbody tr:hover { background: #16333a; }
  .doc-body code { background: var(--bg-alt); border-color: var(--line); color: #7fd6cd; }
  .doc-note { background: rgba(15, 185, 177, .1); border-color: rgba(15, 185, 177, .28); }
  .doc-pager a { background: var(--bg-alt); border-color: var(--line); }
  .doc-totop { background: var(--bg-alt); border-color: var(--line); color: var(--ink-2); }
  .docs-side::-webkit-scrollbar-thumb { background: #23403f; }
  .doc-updated { border-top-color: var(--line); }
  .docs-link:hover { background: var(--bg-alt); color: #7fd6cd; }
  .docs-link.active { background: rgba(15, 185, 177, .16); color: #7fd6cd; }
  .docs-group[data-version="v1"] .docs-link.active { color: #7fd6cd; }
  .docs-group-title { color: #fff; }
  .doc-body .lead { color: var(--ink-3); }
}

/* ---------------- 响应式 ---------------- */
@media (max-width: 1120px) {
  .docs-shell { grid-template-columns: var(--doc-side-w) minmax(0, 1fr); gap: 34px; }
  .docs-toc { display: none; }
}

@media (max-width: 860px) {
  .docs-shell { grid-template-columns: minmax(0, 1fr); padding: 20px 20px 70px; }
  .docs-menu-toggle { display: flex; }
  .docs-side {
    position: fixed;
    top: var(--doc-head-h);
    left: 0; bottom: 0;
    width: 280px;
    max-height: none;
    padding: 20px;
    background: #fff;
    border-right: 1px solid var(--line);
    box-shadow: var(--doc-shadow);
    transform: translateX(-100%);
    transition: transform .24s ease;
    z-index: 70;
    overflow-y: auto;
  }
  .docs-side.open { transform: none; }
  .doc-body h1 { font-size: 28px; }
  .doc-body h2 { font-size: 20px; margin-top: 34px; }
  .doc-pager { grid-template-columns: 1fr; }
  .doc-pager .next { text-align: left; align-items: flex-start; }
  .doc-crumb { flex-wrap: wrap; }
}

@media (prefers-color-scheme: dark) and (max-width: 860px) {
  .docs-side { background: var(--bg); border-right-color: var(--line); }
}

@media (prefers-reduced-motion: reduce) {
  * { transition-duration: .01ms !important; }
  html { scroll-behavior: auto; }
}