:root {
  --ink: #0b1f33;
  --ink-2: #163047;
  --paper: #f6f1e8;
  --card: #fffdf8;
  --line: #d9cfc0;
  --teal: #2ec4b6;
  --teal-d: #1b8f86;
  --mute: #5c6b78;
  --code: #13202c;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "IBM Plex Sans", "Noto Sans SC", sans-serif;
  background: var(--paper);
  color: var(--ink);
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  min-height: 100vh;
  overflow-x: hidden;
}
a { color: var(--teal-d); text-decoration: none; }
a:hover { text-decoration: underline; }
.side {
  background: var(--ink);
  color: #e8efe9;
  padding: 22px 18px 48px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: auto;
}
.brand { display: flex; align-items: center; gap: 10px; margin-bottom: 22px; color: #f4f1ea; }
.brand img { width: 42px; height: 42px; border-radius: 8px; }
.brand strong { font-size: 18px; letter-spacing: 0.08em; }
.brand span { display: block; font-size: 12px; color: #9db0b8; letter-spacing: 0.02em; }
.nav h4 { margin: 18px 0 8px; font-size: 11px; color: var(--teal); letter-spacing: 0.16em; text-transform: uppercase; }
.nav a { display: block; color: #d7e3e0; padding: 5px 8px; border-radius: 6px; font-size: 13px; }
.nav a:hover, .nav a.on { background: var(--ink-2); text-decoration: none; color: #fff; }
.main { padding: 36px 48px 80px; width: 100%; max-width: 980px; min-width: 0; overflow-wrap: anywhere; word-break: break-word; }
.main h1, .main h2, .main h3, .main p, .main ol, .main ul, .main table, .main .note { max-width: 100%; }
.lead, .steps, .note { overflow-wrap: anywhere; word-break: break-word; }
h1 { font-family: Fraunces, "Noto Serif SC", serif; font-size: 34px; margin: 0 0 8px; }
.lead { color: var(--mute); margin: 0 0 22px; font-size: 16px; }
.cards { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 18px 0 28px; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px 16px 14px;
}
.card h3 { margin: 0 0 6px; font-size: 16px; }
.card p { margin: 0; color: var(--mute); font-size: 13px; line-height: 1.5; }
.steps { padding-left: 18px; }
.steps li { margin: 6px 0; }
table { width: 100%; border-collapse: collapse; background: var(--card); margin: 12px 0 24px; }
th, td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; font-size: 13px; vertical-align: top; }
th { background: #efe7d8; }
pre, code { font-family: "IBM Plex Mono", ui-monospace, monospace; }
pre {
  background: var(--code);
  color: #e8f3ef;
  padding: 14px 16px;
  border-radius: 10px;
  max-width: 100%;
  overflow: auto;
  font-size: 12.5px;
  line-height: 1.55;
}
table { display: block; overflow-x: auto; }
h2 { margin-top: 32px; font-size: 22px; }
.note {
  background: #e7f7f4;
  border-left: 4px solid var(--teal);
  padding: 10px 12px;
  margin: 16px 0;
  font-size: 14px;
}
.tag { display: inline-block; background: #e7f7f4; color: var(--teal-d); border-radius: 999px; padding: 2px 8px; font-size: 12px; margin-right: 6px; }
footer.mini { margin-top: 48px; color: var(--mute); font-size: 12px; }
.doc-tabs { position: relative; }
.doc-tab-input { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }
.doc-tab-bar { display: flex; flex-wrap: wrap; gap: 0; border-bottom: 1px solid var(--line); margin: 4px 0 20px; }
.doc-tab {
  cursor: pointer;
  padding: 8px 14px;
  font-size: 14px;
  color: var(--mute);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  user-select: none;
}
.doc-tab:hover { color: var(--ink); text-decoration: none; }
.doc-tab-panel { display: none; }
#tab-unified:checked ~ .doc-tab-bar label[for="tab-unified"],
#tab-official:checked ~ .doc-tab-bar label[for="tab-official"] {
  color: var(--ink);
  border-bottom-color: var(--teal);
  font-weight: 600;
}
#tab-unified:checked ~ #panel-unified,
#tab-official:checked ~ #panel-official { display: block; }
@media (max-width: 900px) {
  body { grid-template-columns: minmax(0, 1fr); }
  .side { position: relative; height: auto; }
  .cards { grid-template-columns: 1fr; }
  .main { width: 100vw; max-width: 100vw; padding: 24px 18px 60px; }
}

/* ===== v2：复制按钮 / 顶部信息胶囊 / 本页目录 / 折叠示例 ===== */
html { scroll-behavior: smooth; }
.meta-pills { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 0 0 24px; }
.pill {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--card); border: 1px solid var(--line); border-radius: 999px;
  padding: 4px 12px; font-size: 12.5px; color: var(--ink-2);
}
.pill b { color: var(--mute); font-weight: 500; }
.pill code { font-size: 12px; background: none; padding: 0; }
button.pill { cursor: pointer; font-family: inherit; }
button.pill:hover { border-color: var(--teal); color: var(--teal-d); }
.code-wrap { position: relative; }
.code-wrap > pre { margin: 12px 0 24px; }
.copy-btn {
  position: absolute; top: 8px; right: 8px; z-index: 2;
  font-size: 11px; padding: 3px 10px; border-radius: 6px; cursor: pointer;
  border: 1px solid rgba(255, 255, 255, 0.28);
  background: rgba(255, 255, 255, 0.14); color: #dfeae6;
  font-family: "IBM Plex Sans", "Noto Sans SC", sans-serif;
}
.copy-btn:hover { background: rgba(255, 255, 255, 0.24); }
.copy-btn.done { background: var(--teal); border-color: var(--teal); color: #06231f; }
main h2, main h3 { scroll-margin-top: 16px; }
details.fold {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 10px; padding: 10px 14px; margin: 14px 0;
}
details.fold > summary { cursor: pointer; font-size: 14px; color: var(--teal-d); font-weight: 600; }
details.fold > summary::marker { color: var(--teal); }
.toc { display: none; }
@media (min-width: 1520px) {
  .toc {
    display: block; position: fixed; top: 36px; right: 32px; width: 196px;
    max-height: 80vh; overflow: auto; font-size: 12.5px;
  }
  .toc h4 { margin: 0 0 8px; font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--mute); }
  .toc ul { list-style: none; margin: 0; padding: 0; }
  .toc li { margin: 4px 0; }
  .toc a { color: var(--mute); }
  .toc a:hover { color: var(--teal-d); }
  .toc li.lv3 { padding-left: 12px; font-size: 12px; }
}

/* ===== v3：正文排版 / 页面工具按钮 / 轻提示 ===== */
main p { line-height: 1.75; margin: 10px 0; }
main ul, main ol { padding-left: 22px; margin: 10px 0; }
main li { margin: 6px 0; line-height: 1.7; }
.page-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; }
.page-head h1 { flex: 1; min-width: 0; }
.icon-btn {
  flex: none; width: 38px; height: 38px; border-radius: 10px; cursor: pointer;
  border: 1px solid var(--line); background: var(--card); color: var(--ink-2);
  display: inline-flex; align-items: center; justify-content: center;
  transition: border-color 0.15s, background 0.15s, color 0.15s;
}
.icon-btn svg { width: 18px; height: 18px; }
.icon-btn:hover { border-color: var(--teal); color: var(--teal-d); }
.icon-btn.done { background: var(--teal); border-color: var(--teal); color: #06231f; }
.toast {
  position: fixed; left: 50%; bottom: 32px; transform: translateX(-50%);
  background: var(--ink); color: #f2f7f4; padding: 10px 16px; border-radius: 10px;
  font-size: 13px; opacity: 0; pointer-events: none; transition: opacity 0.2s; z-index: 99;
}
.toast.show { opacity: 1; }

/* ===== v4：开发者中心式布局（侧栏 API 卡 / 图标导航 / 面包屑 / 锚点 chips / 入口卡片 / 编号步骤） ===== */
.api-box {
  background: var(--ink-2);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 12px;
  padding: 10px 12px;
  margin-bottom: 6px;
}
.api-box-label { display: block; font-size: 12px; color: #9db0b8; margin-bottom: 4px; }
.api-box-row { display: flex; align-items: center; gap: 8px; }
.api-box code { font-size: 12px; color: #f4f1ea; background: none; padding: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; flex: 1; min-width: 0; }
.api-box .icon-btn { width: 30px; height: 30px; border-radius: 8px; border-color: rgba(255, 255, 255, 0.2); background: rgba(255, 255, 255, 0.08); color: #dfeae6; }
.api-box .icon-btn svg { width: 15px; height: 15px; }
.api-box .icon-btn:hover { border-color: var(--teal); color: #fff; }
.nav a { display: flex; align-items: center; gap: 9px; padding: 7px 10px; border-radius: 9px; }
.nav-ico { display: inline-flex; flex: none; color: #9db0b8; }
.nav-ico svg { width: 15px; height: 15px; }
.nav a.on { background: rgba(46, 196, 182, 0.18); color: #fff; }
.nav a.on .nav-ico { color: var(--teal); }
.crumb { font-size: 12.5px; color: var(--mute); margin-bottom: 10px; display: flex; gap: 8px; align-items: center; }
.crumb a { color: var(--teal-d); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 22px; }
.chip {
  border: 1px solid var(--line); background: var(--card); color: var(--ink-2);
  border-radius: 999px; padding: 5px 14px; font-size: 13px;
}
.chip:hover { border-color: var(--teal); color: var(--teal-d); text-decoration: none; }
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin: 18px 0 28px; }
.card-ico { display: inline-flex; width: 30px; height: 30px; border-radius: 9px; background: #e7f7f4; color: var(--teal-d); align-items: center; justify-content: center; margin-bottom: 10px; }
.card-ico svg { width: 16px; height: 16px; }
.steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin: 14px 0 28px; }
.step { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px; }
.step-num { font-family: "IBM Plex Mono", monospace; color: var(--teal-d); font-size: 22px; font-weight: 600; }
.step h3 { margin: 6px 0; font-size: 15px; }
.step p { margin: 0; color: var(--mute); font-size: 13px; line-height: 1.6; }
@media (max-width: 900px) {
  .card-grid, .steps-grid { grid-template-columns: 1fr; }
}