/* 指南长文页：与首页 / 详情页同一套配色，版式改为阅读优先 */
:root{
  --bg:#08080f; --bg2:#0d0d1a; --surface:#141428; --surface2:#1b1b34;
  --text:#e8e8f5; --muted:#9a9ac0; --dim:#7a7a9a;
  --accent1:#ff6b9d; --accent2:#4ecdc4; --accent3:#ffe66d; --accent5:#6c8cff;
  --border:rgba(255,255,255,.08);
  --measure:720px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  font-family:'Segoe UI',system-ui,-apple-system,'PingFang SC','Microsoft YaHei',sans-serif;
  background:radial-gradient(circle at 20% 0%,#16162e 0%,var(--bg) 55%);
  color:var(--text); line-height:1.8; min-height:100vh;
}
a{color:var(--accent2);text-decoration:none}
a:hover{text-decoration:underline}

/* 顶部 */
.topbar{position:sticky;top:0;z-index:100;background:rgba(8,8,15,.85);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--border)}
.topbar-inner{max-width:1000px;margin:0 auto;padding:0 1.5rem;height:60px;
  display:flex;align-items:center;gap:1rem}
.brand{display:flex;align-items:center;gap:.5rem;color:var(--text);font-weight:700;letter-spacing:.03em}
.brand:hover{text-decoration:none}
.brand-icon{width:30px;height:30px;border-radius:8px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--accent1),var(--accent2));font-size:.95rem}
.topnav{margin-left:auto;display:flex;gap:.2rem;font-size:.88rem;align-items:center}
.topnav a{color:var(--muted);padding:.4rem .7rem;border-radius:16px;white-space:nowrap}
.topnav a:hover{background:rgba(255,255,255,.06);color:#fff;text-decoration:none}
/* 列表页上「深度指南」就是当前页，做成不可点的当前项，避免点了没反应 */
.topnav .cur{color:#fff;background:rgba(255,255,255,.09);padding:.4rem .7rem;border-radius:16px;
  white-space:nowrap;cursor:default;font-weight:600}
.lang-switch{background:rgba(108,140,255,.12);color:var(--accent5);border:1px solid rgba(108,140,255,.35);
  border-radius:16px;padding:.35rem .9rem;font-size:.85rem;font-weight:700;font-family:inherit;
  cursor:pointer;transition:all .2s;white-space:nowrap;margin-left:.4rem}
.lang-switch:hover{background:rgba(108,140,255,.28);color:#fff}

/* 布局：正文 + 侧边目录 */
.layout{max-width:1040px;margin:0 auto;padding:2rem 1.5rem 1rem;
  display:grid;grid-template-columns:minmax(0,var(--measure)) 220px;gap:3.5rem;justify-content:center}
@media (max-width:900px){
  .layout{grid-template-columns:minmax(0,1fr);gap:0;padding:1.4rem 1rem 1rem}
  .toc{display:none}
}
/* 没有侧边目录的页面（总览 / 关于 / 更新日志）：单栏居中 */
.layout.single{grid-template-columns:minmax(0,860px);max-width:920px}

/* 面包屑 */
.crumbs{font-size:.82rem;color:var(--dim);margin-bottom:1.4rem;display:flex;gap:.5rem;flex-wrap:wrap}
.crumbs a{color:var(--dim)}
.crumbs a:hover{color:var(--accent2)}
.crumbs .here{color:var(--muted)}
.crumbs .sep{opacity:.4}

/* 标题区 */
.head{margin-bottom:2.2rem;padding-bottom:1.6rem;border-bottom:1px solid var(--border)}
.head .kicker{display:inline-flex;align-items:center;gap:.45rem;font-size:.78rem;letter-spacing:.08em;
  text-transform:uppercase;color:var(--accent3);background:rgba(255,230,109,.09);
  border:1px solid rgba(255,230,109,.22);padding:.25rem .75rem;border-radius:12px;margin-bottom:1rem}
.head h1{font-size:clamp(1.7rem,4.4vw,2.5rem);font-weight:800;line-height:1.3;letter-spacing:.01em;
  color:#f2f2ff;margin-bottom:.9rem}
.head .lead{color:var(--muted);font-size:1.05rem;line-height:1.85}
.byline{display:flex;gap:1.2rem;flex-wrap:wrap;font-size:.8rem;color:var(--dim);margin-top:1.1rem}
.byline span{display:inline-flex;align-items:center;gap:.35rem}

/* 正文 */
.article h2{font-size:1.4rem;font-weight:700;line-height:1.4;color:#f0f0ff;
  margin:2.6rem 0 1rem;scroll-margin-top:80px;display:flex;align-items:center;gap:.6rem}
.article h2::before{content:'';flex:0 0 4px;height:1.1em;border-radius:2px;
  background:linear-gradient(180deg,var(--accent1),var(--accent5))}
.article h3{font-size:1.08rem;font-weight:600;color:#dedef2;margin:1.8rem 0 .7rem}
.article p{color:#bcbcd6;font-size:1.02rem;margin-bottom:1.05rem}
.article p strong{color:#e6e6f8;font-weight:600}
.article code{font-family:Consolas,Monaco,monospace;font-size:.88em;color:var(--accent3);
  background:rgba(255,230,109,.09);padding:.1em .4em;border-radius:5px}
.article ul,.article ol{margin:0 0 1.2rem 1.3rem;color:#bcbcd6}
.article li{margin-bottom:.5rem;font-size:1.01rem}
.article li::marker{color:var(--accent2)}
.article blockquote{border-left:3px solid rgba(78,205,196,.5);padding:.2rem 0 .2rem 1.1rem;
  margin:1.4rem 0;color:var(--muted);font-size:.98rem}

/* 代码块 */
.code-wrap{background:#05050c;border:1px solid var(--border);border-radius:14px;overflow:hidden;margin:1.3rem 0 1.6rem}
.code-bar{display:flex;align-items:center;justify-content:space-between;padding:.5rem .9rem;
  background:rgba(255,255,255,.04);border-bottom:1px solid var(--border)}
.code-bar span{font-size:.75rem;color:var(--dim);font-family:Consolas,Monaco,monospace;letter-spacing:.03em}
.code-bar button{background:rgba(255,230,109,.12);color:var(--accent3);border:1px solid rgba(255,230,109,.25);
  padding:.28rem .8rem;border-radius:14px;font-size:.75rem;font-weight:600;font-family:inherit;
  cursor:pointer;transition:all .2s}
.code-bar button:hover{background:rgba(255,230,109,.25)}
pre.code-block{margin:0;padding:1rem;max-height:420px;overflow:auto;font-size:.79rem;line-height:1.65;
  color:#c8c8e8;font-family:Consolas,Monaco,monospace;white-space:pre;tab-size:2}
.code-cap{font-size:.84rem;color:var(--dim);margin:-.9rem 0 1.5rem;padding-left:.2rem}

/* 侧边目录 */
.toc{position:sticky;top:92px;align-self:start;font-size:.85rem}
.toc h2{font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--dim);
  margin-bottom:.8rem;font-weight:600}
.toc ol{list-style:none;border-left:1px solid var(--border);padding-left:0}
.toc li{margin:0}
.toc a{display:block;padding:.42rem 0 .42rem .9rem;color:var(--muted);border-left:2px solid transparent;
  margin-left:-1px;line-height:1.5;transition:all .18s}
.toc a:hover{color:#fff;border-left-color:var(--accent1);text-decoration:none;background:rgba(255,255,255,.03)}

/* 关联 demo */
.demos{margin:2.8rem 0 0;padding-top:1.6rem;border-top:1px solid var(--border)}
.demos h2{font-size:1.2rem;font-weight:700;margin-bottom:.4rem;color:#f0f0ff}
.demos .sub{color:var(--dim);font-size:.9rem;margin-bottom:1.2rem}
.demo-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:.8rem}
.demo-card{display:flex;flex-direction:column;gap:.25rem;padding:.85rem 1rem;border-radius:12px;
  background:rgba(255,255,255,.03);border:1px solid var(--border);transition:all .2s}
.demo-card:hover{background:rgba(255,255,255,.07);border-color:rgba(255,255,255,.18);
  transform:translateY(-2px);text-decoration:none}
.demo-card .t{color:var(--text);font-size:.94rem;font-weight:600}
.demo-card .d{color:var(--dim);font-size:.8rem;line-height:1.5}

/* 上下篇 */
.pager{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin:2.8rem 0}
.pn{display:flex;flex-direction:column;gap:.2rem;padding:.95rem 1.1rem;border-radius:14px;
  background:rgba(255,255,255,.03);border:1px solid var(--border);transition:all .2s}
.pn:hover{background:rgba(255,255,255,.07);text-decoration:none;transform:translateY(-2px)}
.pn .dir{font-size:.74rem;color:var(--dim);letter-spacing:.04em}
.pn strong{font-size:.95rem;color:var(--text);font-weight:600;line-height:1.4}
.pn.next{text-align:right}
.pn.empty{border:none;background:none}
@media (max-width:640px){ .pager{grid-template-columns:1fr} .pn.next{text-align:left} }

/* CTA */
.cta{text-align:center;background:linear-gradient(160deg,rgba(255,107,157,.1),rgba(108,140,255,.1));
  border:1px solid rgba(255,255,255,.1);border-radius:18px;padding:1.6rem 1.2rem;margin-bottom:2.4rem}
.cta p{color:var(--muted);font-size:.95rem;margin-bottom:1rem}
.btn{display:inline-block;background:linear-gradient(135deg,var(--accent1),#a37eba);color:#fff;
  padding:.7rem 1.8rem;border-radius:26px;font-weight:700;font-size:.95rem;
  box-shadow:0 8px 24px rgba(255,107,157,.35);transition:all .25s}
.btn:hover{transform:translateY(-2px);text-decoration:none}

/* 页脚 */
.foot{text-align:center;padding:2.2rem 1.5rem;border-top:1px solid var(--border);
  color:var(--dim);font-size:.85rem;margin-top:1rem}
.foot-links{display:flex;gap:1.5rem;justify-content:center;align-items:center;flex-wrap:wrap;margin-top:.7rem}
.foot-links a{color:var(--dim)}
.foot-links a:hover{color:var(--accent1);text-decoration:none}
.foot-btn{appearance:none;background:none;border:0;padding:0;font:inherit;color:var(--dim);cursor:pointer}
.foot-btn:hover{color:var(--accent1)}

/* 语言切换：只显示当前语言的块 */
html[lang="en"] [data-lang="zh"],
html[lang="zh-CN"] [data-lang="en"]{display:none}

/* 指南总览页 */
.index-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.1rem;margin-top:2rem}
.guide-card{display:flex;flex-direction:column;gap:.5rem;padding:1.3rem 1.4rem;border-radius:16px;
  background:rgba(255,255,255,.03);border:1px solid var(--border);transition:all .22s}
.guide-card:hover{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.18);
  transform:translateY(-3px);text-decoration:none}
.guide-card .n{font-size:.72rem;color:var(--accent3);letter-spacing:.1em}
.guide-card h3{font-size:1.05rem;font-weight:600;color:var(--text);line-height:1.45}
.guide-card p{font-size:.87rem;color:var(--dim);line-height:1.65}
.guide-card .meta{font-size:.75rem;color:var(--dim);opacity:.8;margin-top:.2rem}