/* Semlink Docs — 零依赖文档站样式，品牌色与主站一致 */
:root{--blue:#8b6cef;--blue-dark:#6745d9;--blue-light:#e9e2fb;--ink:#0f172a;--body:#334155;--muted:#64748b;--line:#e2e8f0;--bg:#f8fafc;--card:#fff}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--body);background:#fff;line-height:1.75;-webkit-font-smoothing:antialiased}

/* ── 顶栏 ── */
.top{position:sticky;top:0;z-index:10;background:rgba(255,255,255,.93);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.top .bar{max-width:74rem;margin:0 auto;display:flex;align-items:center;gap:.9rem;padding:.65rem 1.25rem}
.logo{display:flex;align-items:center;gap:.55rem;font-weight:700;color:var(--ink);text-decoration:none;font-size:1.02rem}
.logo svg{width:1.45rem;height:1.45rem;color:var(--blue)}
.docstag{font-size:.72rem;font-weight:700;letter-spacing:.06em;color:var(--blue-dark);background:var(--blue-light);border-radius:.4rem;padding:.1rem .45rem;text-transform:uppercase}
.lang-btn{margin-left:auto;border:1px solid var(--line);background:#fff;color:var(--muted);border-radius:999px;padding:.26rem .8rem;font-size:.82rem;cursor:pointer;font-weight:600}
.lang-btn:hover{border-color:var(--blue);color:var(--blue)}
.back{color:var(--muted);font-size:.84rem;text-decoration:none;white-space:nowrap}
.back:hover{color:var(--blue)}

/* ── 布局：侧栏 + 正文 ── */
.shell{max-width:74rem;margin:0 auto;display:grid;grid-template-columns:15.5rem minmax(0,1fr);gap:2.5rem;padding:0 1.25rem}
.sidebar{position:sticky;top:3.3rem;align-self:start;padding:1.5rem 0 2rem;max-height:calc(100vh - 3.3rem);overflow:auto}
.sidebar .sec{font-size:.72rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:1.25rem 0 .35rem;padding-left:.6rem}
.sidebar .sec:first-child{margin-top:1.3rem}
.sidebar a{display:block;padding:.32rem .6rem;border-radius:.5rem;color:var(--body);text-decoration:none;font-size:.9rem}
.sidebar a:hover{background:var(--bg);color:var(--ink)}
.sidebar a.active{background:var(--blue-light);color:var(--blue-dark);font-weight:600}

.doc{padding:1.9rem 0 4rem;max-width:46rem}
.doc h1{color:var(--ink);font-size:1.72rem;letter-spacing:-.01em;line-height:1.28;margin-bottom:.4rem}
.doc .meta{color:var(--muted);font-size:.85rem;margin-bottom:1.6rem}
.doc h2{color:var(--ink);font-size:1.16rem;margin:1.9rem 0 .55rem;padding-top:.35rem}
.doc h3{color:var(--ink);font-size:1rem;margin:1.4rem 0 .45rem}
.doc p{margin-bottom:.75rem}
.doc ul,.doc ol{margin:0 0 .8rem 1.25rem}
.doc li{margin-bottom:.3rem}
.doc a{color:var(--blue)}
.doc code{background:var(--bg);border:1px solid var(--line);border-radius:.35rem;padding:.08rem .35rem;font-size:.85em;font-family:ui-monospace,SFMono-Regular,Consolas,monospace}
.doc pre{background:var(--bg);border:1px solid var(--line);border-radius:.6rem;padding:.85rem 1rem;overflow:auto;margin:0 0 .9rem}
.doc pre code{background:none;border:none;padding:0;font-size:.85em;line-height:1.6;color:var(--ink)}
.doc table{width:100%;border-collapse:collapse;font-size:.9rem;margin:0 0 1rem}
.doc th,.doc td{border:1px solid var(--line);padding:.5rem .65rem;text-align:left;vertical-align:top}
.doc th{background:var(--bg);color:var(--ink)}
.doc img{max-width:100%;border:1px solid var(--line);border-radius:.6rem;margin:.4rem 0 1rem}
.tip{border-left:3px solid var(--blue);background:var(--bg);border-radius:0 .6rem .6rem 0;padding:.7rem 1rem;margin:0 0 1rem;font-size:.92rem}
.tip b{color:var(--ink)}

/* ── 首页卡片 ── */
.cards{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin:1.6rem 0}
.cards a{display:block;border:1px solid var(--line);border-radius:.8rem;padding:1rem 1.1rem;text-decoration:none;color:var(--body);background:var(--card);transition:box-shadow .15s}
.cards a:hover{box-shadow:0 10px 24px -14px rgba(15,23,42,.3)}
.cards a b{color:var(--ink);display:block;margin-bottom:.25rem}
.cards a span{font-size:.88rem}

/* ── 对比表 / 步骤（页面可复用）── */
.cmp{width:100%;border-collapse:collapse;font-size:.9rem;margin:0 0 1rem}
.cmp th,.cmp td{border:1px solid var(--line);padding:.5rem .65rem;text-align:left;vertical-align:top}
.cmp th{background:var(--bg);color:var(--ink)}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin:1.4rem 0}
.step{border:1px solid var(--line);border-radius:.8rem;padding:1rem;background:var(--card)}
.step .num{width:1.7rem;height:1.7rem;border-radius:999px;background:var(--grad);color:#fff;font-weight:700;font-size:.85rem;display:flex;align-items:center;justify-content:center;margin-bottom:.6rem}
.step h3{margin:0 0 .3rem}
.step p{font-size:.9rem;margin:0}

@media(max-width:900px){
  .shell{grid-template-columns:1fr;gap:0}
  .sidebar{position:static;max-height:none;padding:1rem 0;border-bottom:1px solid var(--line)}
  .cards{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
}