:root{--bg:#f5f6f8;--paper:#fff;--ink:#20242b;--muted:#6f7782;--line:#e3e7ec;--accent:#24364b;--soft:#edf1f5;--code:#f1f3f5}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",Arial,sans-serif;line-height:1.72}.layout{display:grid;grid-template-columns:286px 1fr;min-height:100vh}.sidebar{position:sticky;top:0;height:100vh;overflow:auto;padding:26px 16px;border-right:1px solid var(--line);background:#fbfbfc}.brand{display:flex;align-items:baseline;gap:9px;padding:0 10px 18px}.brand b{font-size:25px;letter-spacing:.08em}.brand span{font-size:13px;color:var(--muted)}nav button{display:block;width:100%;border:0;background:transparent;text-align:left;padding:8px 11px;border-radius:7px;color:#4b535d;cursor:pointer;font-size:14px}nav button:hover{background:var(--soft)}nav 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/* 全站悬浮快捷导航：始终固定在视口右上角，不随正文滚动 */
.global-nav{position:fixed;top:16px;right:18px;z-index:9999;display:flex;gap:10px;align-items:center;pointer-events:none}
.global-nav-btn{pointer-events:auto;display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:8px 14px;border-radius:9px;border:1px solid rgba(22,37,55,.18);background:rgba(255,255,255,.96);box-shadow:0 6px 20px rgba(20,31,45,.14);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);color:#203247;text-decoration:none;font-size:13px;font-weight:700;white-space:nowrap;transition:transform .15s ease,box-shadow .15s ease,background .15s ease}
.global-nav-btn:hover{transform:translateY(-1px);box-shadow:0 8px 24px rgba(20,31,45,.20);background:#fff}
.global-nav-btn.server{background:#24364b;color:#fff;border-color:#24364b}
.global-nav-btn.server:hover{background:#182a3d}
@media(max-width:900px){.global-nav{top:10px;right:10px;gap:6px}.global-nav-btn{min-height:36px;padding:7px 10px;font-size:12px}.global-nav-btn.server{max-width:150px}}
@media(max-width:520px){.global-nav{left:10px;right:10px;justify-content:flex-end}.global-nav-btn{padding:6px 9px;font-size:11px}.global-nav-btn.server{max-width:none}}