/* ============ XZCLOUD · 文档阅读样式 ============
 * 覆盖文档中心（索引卡片）与单篇文档（侧栏目录 + 正文）
 * 依赖：无（图标走本地 Font Awesome）
 */
:root{
  --pri:#12b7f5; --pri-d:#0ea5dd; --pri-l:#e6f5fe;
  --ink:#0f172a; --ink2:#334155; --ink3:#64748b; --ink4:#94a3b8;
  --line:#e2e8f0; --line2:rgba(226,232,240,.9);
  --bg:#eef3f9; --card:rgba(255,255,255,.84);
  --code-bg:#0f172a; --code-ink:#dbe4ef;
  --ease:cubic-bezier(.22,.61,.36,1);
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
  --sans:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:82px}
body{
  margin:0;font-family:var(--sans);color:var(--ink);background:var(--bg);font-size:15px;line-height:1.78;
  background-image:radial-gradient(60rem 30rem at 110% -10%,rgba(18,183,245,.14),transparent 60%),
                   radial-gradient(50rem 26rem at -10% 110%,rgba(139,92,246,.12),transparent 60%);
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
a{color:var(--pri);text-decoration:none}
a:hover{text-decoration:underline}

/* ---------- 顶栏 ---------- */
.doc-top{
  position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:9px;padding:11px 22px;
  background:rgba(255,255,255,.8);border-bottom:1px solid var(--line2);
  -webkit-backdrop-filter:blur(16px) saturate(170%);backdrop-filter:blur(16px) saturate(170%);
}
.doc-brand{display:flex;align-items:center;gap:9px;font-weight:500;font-size:15px;color:var(--ink);flex-shrink:0}
.doc-brand:hover{text-decoration:none}
.doc-logo{
  width:28px;height:28px;border-radius:8px;display:inline-flex;align-items:center;justify-content:center;
  font-size:11px;font-weight:500;color:#fff;background:linear-gradient(135deg,#12b7f5,#7c8ff5);
  box-shadow:0 4px 12px rgba(18,183,245,.38);
}
.doc-sep{color:#cbd5e1;flex-shrink:0}
.doc-crumb{font-size:13.5px;color:var(--ink3);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.doc-sp{flex:1}
.doc-act{
  display:inline-flex;align-items:center;gap:6px;font-size:13px;color:#475569;padding:7px 13px;
  border-radius:9px;background:rgba(255,255,255,.72);border:1px solid var(--line2);
  transition:color .22s var(--ease),border-color .22s,transform .22s var(--ease);flex-shrink:0;
}
.doc-act:hover{color:var(--pri);border-color:rgba(18,183,245,.5);transform:translateY(-1px);text-decoration:none}

/* ---------- 布局 ---------- */
.doc-wrap{max-width:900px;margin:0 auto;padding:28px 22px 90px}
.doc-layout{display:flex;gap:26px;max-width:1180px;margin:0 auto;padding:26px 22px 90px;align-items:flex-start}

/* 侧边目录 */
.doc-side{
  position:sticky;top:78px;width:238px;flex-shrink:0;max-height:calc(100vh - 104px);overflow-y:auto;
  padding:15px 11px;border-radius:16px;background:var(--card);border:1px solid rgba(255,255,255,.72);
  -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);box-shadow:0 8px 30px rgba(31,38,135,.07);
}
.doc-toc .toc-title{
  display:flex;align-items:center;gap:7px;font-size:12px;color:var(--ink4);letter-spacing:.4px;
  padding:2px 10px 10px;border-bottom:1px solid var(--line2);margin-bottom:8px;
}
.doc-toc .toc-title i{color:var(--pri)}
.doc-toc ul{list-style:none;margin:0;padding:0}
.doc-toc li{margin:1px 0}
.doc-toc a{
  display:block;font-size:13px;color:#4b5563;padding:6px 10px;border-radius:8px;line-height:1.5;
  border-left:2px solid transparent;transition:background .2s,color .2s,border-color .2s;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.doc-toc a:hover{background:rgba(240,247,253,.95);color:var(--pri);text-decoration:none}
.doc-toc a.on{background:var(--pri-l);color:var(--pri-d);border-left-color:var(--pri);font-weight:500}
.doc-toc .lv3 a{padding-left:22px;font-size:12.5px;color:var(--ink3)}
.doc-toc .lv4 a{padding-left:34px;font-size:12.5px;color:var(--ink4)}

.doc-main{flex:1;min-width:0}

/* ---------- 正文卡片 ---------- */
.doc-body{
  background:var(--card);border:1px solid rgba(255,255,255,.72);border-radius:18px;
  padding:34px 40px 46px;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
  box-shadow:0 10px 40px rgba(31,38,135,.08);animation:fadeUp .45s var(--ease) both;
}
@keyframes fadeUp{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}

/* ---------- 文档头 ---------- */
.docs-head{margin:0 0 26px}
.docs-head .doc-back{
  display:inline-flex;align-items:center;gap:6px;font-size:13px;color:#475569;padding:7px 14px;
  border-radius:999px;background:rgba(255,255,255,.72);border:1px solid var(--line2);
  transition:.22s var(--ease);margin-bottom:16px;
}
.docs-head .doc-back:hover{color:var(--pri);transform:translateX(-3px);text-decoration:none}
.docs-head h1{
  font-size:26px;font-weight:500;color:var(--ink);display:flex;align-items:center;gap:10px;
  margin:0 0 8px;line-height:1.35;
}
.docs-head h1 i{color:var(--pri);font-size:22px}
.docs-head .sub{color:var(--ink3);font-size:13px;margin:0;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.docs-head .sub i{color:var(--ink4)}

/* ---------- 正文排版 ---------- */
.doc-body h1,.doc-body h2,.doc-body h3,.doc-body h4,.doc-body h5,.doc-body h6{
  font-weight:500;color:var(--ink);line-height:1.4;position:relative;scroll-margin-top:82px;
}
.doc-body h1{font-size:24px;margin:8px 0 18px}
.doc-body h2{
  font-size:20px;margin:40px 0 16px;padding-bottom:10px;border-bottom:1px solid var(--line2);
}
.doc-body h2:first-child{margin-top:0}
.doc-body h3{font-size:17px;margin:30px 0 12px}
.doc-body h4{font-size:15px;margin:24px 0 10px;color:var(--ink2)}
.doc-body h5,.doc-body h6{font-size:14px;margin:20px 0 8px;color:var(--ink3)}
.doc-body .anchor{
  opacity:0;margin-left:8px;font-size:13px;color:var(--ink4);transition:opacity .2s;text-decoration:none;
}
.doc-body h1:hover .anchor,.doc-body h2:hover .anchor,.doc-body h3:hover .anchor,
.doc-body h4:hover .anchor{opacity:1}

.doc-body p{margin:0 0 15px;color:var(--ink2)}
.doc-body strong{font-weight:500;color:var(--ink)}
.doc-body em{font-style:normal;color:var(--pri-d);background:rgba(18,183,245,.08);padding:0 3px;border-radius:4px}
.doc-body del{color:var(--ink4)}
.doc-body a{word-break:break-word}

/* 行内代码 */
.doc-body code{
  font-family:var(--mono);font-size:12.8px;background:rgba(148,163,184,.16);color:#0f172a;
  padding:2px 6px;border-radius:5px;border:1px solid rgba(148,163,184,.2);word-break:break-word;
}

/* 代码块 */
.doc-body .code-block{
  position:relative;margin:0 0 18px;border-radius:12px;overflow:hidden;background:var(--code-bg);
  box-shadow:0 6px 22px rgba(15,23,42,.18);
}
.doc-body .code-lang{
  font-family:var(--mono);font-size:11px;color:#8b9cb3;letter-spacing:.6px;text-transform:uppercase;
  padding:8px 15px;background:rgba(255,255,255,.045);border-bottom:1px solid rgba(255,255,255,.07);
}
.doc-body pre{margin:0;overflow-x:auto}
.doc-body pre code{
  display:block;background:none;border:0;color:var(--code-ink);font-size:12.9px;line-height:1.72;
  padding:15px 17px;white-space:pre;tab-size:4;
}
.doc-body pre::-webkit-scrollbar{height:8px}
.doc-body pre::-webkit-scrollbar-thumb{background:rgba(255,255,255,.18);border-radius:4px}

/* 列表 */
.doc-body ul,.doc-body ol{margin:0 0 15px;padding-left:24px;color:var(--ink2)}
.doc-body li{margin:5px 0}
.doc-body li>ul,.doc-body li>ol{margin:5px 0 3px}
.doc-body ul{list-style:none;padding-left:6px}
.doc-body ul>li{position:relative;padding-left:18px}
.doc-body ul>li::before{
  content:"";position:absolute;left:4px;top:.72em;width:5px;height:5px;border-radius:50%;
  background:var(--pri);opacity:.75;
}
.doc-body ul ul>li::before{background:var(--ink4);opacity:.6;width:4px;height:4px}
.doc-body ol{list-style:none;counter-reset:ol;padding-left:6px}
.doc-body ol>li{position:relative;padding-left:26px;counter-increment:ol}
.doc-body ol>li::before{
  content:counter(ol);position:absolute;left:0;top:.28em;width:18px;height:18px;border-radius:6px;
  background:var(--pri-l);color:var(--pri-d);font-size:11px;font-weight:500;
  display:flex;align-items:center;justify-content:center;line-height:1;
}
.doc-body li input[type=checkbox],.doc-body .task i{margin-right:7px;color:var(--pri)}
.doc-body .task.done{color:var(--ink4);text-decoration:line-through}
.doc-body .task.done i{color:#22c55e}

/* 表格 */
.doc-body .tbl-wrap{
  margin:0 0 18px;border:1px solid var(--line);border-radius:12px;overflow-x:auto;background:#fff;
  box-shadow:0 2px 10px rgba(31,38,135,.04);
}
.doc-body table{border-collapse:collapse;width:100%;font-size:13.5px;min-width:440px}
.doc-body thead th{
  background:rgba(241,245,249,.95);font-weight:500;color:var(--ink);text-align:left;
  padding:11px 15px;border-bottom:1px solid var(--line);white-space:nowrap;
}
.doc-body tbody td{padding:10px 15px;border-bottom:1px solid rgba(226,232,240,.7);color:var(--ink2);vertical-align:top}
.doc-body tbody tr:last-child td{border-bottom:0}
.doc-body tbody tr:hover td{background:rgba(240,247,253,.6)}
.doc-body td code,.doc-body th code{font-size:12.2px}

/* 引用块 */
.doc-body blockquote{
  margin:0 0 18px;padding:14px 18px;border-left:3px solid var(--pri);border-radius:0 10px 10px 0;
  background:rgba(230,245,254,.6);color:var(--ink2);font-size:14px;
}
.doc-body blockquote p:last-child{margin-bottom:0}

/* 分隔线 */
.doc-body hr{border:0;border-top:1px solid var(--line2);margin:32px 0}

/* 图片 */
.doc-body img{max-width:100%;border-radius:10px;border:1px solid var(--line)}

/* ---------- 文档中心（索引） ---------- */
.docs-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:18px}
.doc-card{
  position:relative;border-radius:18px;padding:24px;background:var(--card);
  border:1px solid rgba(255,255,255,.72);--accent:#12b7f5;overflow:hidden;
  -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
  box-shadow:0 8px 30px rgba(31,38,135,.07);
  transition:transform .32s var(--ease),box-shadow .32s;animation:fadeUp .5s var(--ease) both;
}
.doc-card:nth-child(2){animation-delay:.06s}
.doc-card:nth-child(3){animation-delay:.12s}
.doc-card:nth-child(4){animation-delay:.18s}
.doc-card::before{
  content:"";position:absolute;inset:0 0 auto 0;height:3px;
  background:linear-gradient(90deg,var(--accent),transparent);
}
.doc-card:hover{transform:translateY(-6px);box-shadow:0 18px 44px rgba(31,38,135,.14)}
.doc-icon{
  width:46px;height:46px;border-radius:13px;display:flex;align-items:center;justify-content:center;
  font-size:19px;color:#fff;background:linear-gradient(135deg,var(--accent),color-mix(in srgb,var(--accent) 55%,#fff));
  box-shadow:0 6px 18px color-mix(in srgb,var(--accent) 40%,transparent);margin-bottom:14px;
}
.doc-card h3{font-size:16px;font-weight:500;color:var(--ink);margin:0 0 7px}
.doc-card p{font-size:13px;color:var(--ink3);line-height:1.72;margin:0 0 14px;min-height:46px}
.doc-foot{display:flex;justify-content:space-between;font-size:12px;gap:8px;color:var(--ink4)}
.doc-foot .muted{color:var(--ink4)}
.doc-actions{display:flex;gap:10px;margin-top:16px}
.doc-btn{
  flex:1;text-align:center;font-size:13px;padding:9px 0;border-radius:10px;text-decoration:none;
  color:#475569;background:rgba(241,245,249,.9);border:1px solid var(--line);transition:.22s;
}
.doc-btn:hover{background:#fff;color:var(--ink);text-decoration:none}
.doc-btn.primary{
  background:linear-gradient(135deg,#12b7f5,#0ea5e9);color:#fff;border-color:transparent;
  box-shadow:0 6px 16px rgba(18,183,245,.32);
}
.doc-btn.primary:hover{filter:brightness(1.06);color:#fff}
.doc-tag.off{font-size:12px;color:#b45309;background:#fef3c7;border-radius:8px;padding:4px 10px}

/* ---------- 回到顶部 ---------- */
.doc-top-btn{
  position:fixed;right:26px;bottom:26px;width:42px;height:42px;border-radius:50%;border:1px solid var(--line2);
  background:rgba(255,255,255,.85);color:#475569;font-size:15px;cursor:pointer;z-index:30;
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);box-shadow:0 8px 24px rgba(31,38,135,.14);
  opacity:0;pointer-events:none;transform:translateY(10px);transition:.28s var(--ease);
  display:flex;align-items:center;justify-content:center;
}
.doc-top-btn.on{opacity:1;pointer-events:auto;transform:none}
.doc-top-btn:hover{color:var(--pri);border-color:rgba(18,183,245,.5)}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px){
  .doc-side{display:none}
  .doc-layout{padding:20px 16px 80px}
}
@media (max-width: 720px){
  body{font-size:14.5px}
  .doc-top{padding:10px 13px;gap:7px}
  .doc-brand{font-size:14px}
  .doc-crumb{display:none}
  .doc-sep{display:none}
  .doc-act{padding:6px 10px;font-size:12.5px}
  .doc-act span{display:none}
  .doc-layout,.doc-wrap{padding:16px 12px 70px}
  .doc-body{padding:22px 17px 30px;border-radius:16px}
  .docs-head h1{font-size:21px}
  .docs-head h1 i{font-size:18px}
  .doc-body h1{font-size:20px}
  .doc-body h2{font-size:17.5px;margin:30px 0 13px}
  .doc-body h3{font-size:15.5px;margin:24px 0 10px}
  .doc-body pre code{font-size:12.2px;padding:13px 14px}
  .doc-body .tbl-wrap{border-radius:10px}
  .doc-body table{min-width:360px;font-size:12.8px}
  .doc-body thead th,.doc-body tbody td{padding:9px 11px}
  .docs-grid{grid-template-columns:1fr}
  .doc-top-btn{right:14px;bottom:14px;width:38px;height:38px}
}