/* 水到渠成 · 分頁共用樣式 */
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:#0e0b09;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang TC","Noto Sans TC","Microsoft JhengHei",sans-serif;
  color:#e8dcc8;-webkit-font-smoothing:antialiased;line-height:1.7;
  padding:28px 16px 60px;min-height:100vh;
  display:flex;justify-content:center;align-items:flex-start;gap:26px;
}
.wrap{width:100%;max-width:720px}

/* 側邊導航 */
.sidenav{flex:0 0 214px;position:sticky;top:28px;background:#141010;border:1px solid rgba(191,161,103,0.16);border-radius:14px;padding:16px 14px}
.sn-brand{display:flex;flex-direction:column;gap:2px;padding:2px 8px 12px;border-bottom:1px solid rgba(191,161,103,0.12);margin-bottom:8px}
.sn-brand a{font-size:19px;font-weight:850;color:#e8dcc8;letter-spacing:1px}
.sn-brand span{font-size:10px;color:#6b5e42;letter-spacing:3px}
.sn-home{display:block;font-size:12px;color:#8a7a5a;font-weight:600;padding:4px 8px 8px}
.sn-home:hover{color:#d4b87a}
.sn-group{font-size:10px;letter-spacing:2px;color:#6b5e42;font-weight:700;text-transform:uppercase;padding:12px 8px 4px}
.sn-item{display:flex;align-items:center;gap:8px;font-size:13px;color:#b7a888;font-weight:600;padding:9px 8px;border-radius:9px;transition:background .16s,color .16s}
.sn-item:hover{background:rgba(191,161,103,0.06);color:#e8dcc8}
.sn-item.active{background:rgba(191,161,103,0.12);color:#f0e6d2}
.sn-dot{width:9px;height:9px;border-radius:3px;flex:0 0 auto}
.sn-k{font-size:10px;color:#6b5e42;width:13px;text-align:center;flex:0 0 auto;font-weight:800}
.sn-item.active .sn-k{color:#d4b87a}

@media (max-width:860px){
  body{flex-direction:column;align-items:stretch}
  .wrap{margin:0 auto}
  .sidenav{position:sticky;top:0;z-index:20;flex:none;width:100%;display:flex;align-items:center;flex-wrap:nowrap;overflow-x:auto;gap:8px;padding:10px 12px;-webkit-overflow-scrolling:touch}
  .sidenav::-webkit-scrollbar{display:none}
  .sn-brand,.sn-group{display:none}
  .sn-home{padding:8px 10px;white-space:nowrap;flex:0 0 auto}
  .sn-item{flex:0 0 auto;white-space:nowrap}
}

a{color:#d4b87a;text-decoration:none}
.back{display:inline-flex;align-items:center;gap:6px;font-size:14px;color:#8a7a5a;font-weight:600;margin-bottom:20px}
.back:hover{color:#d4b87a}

.ph{background:linear-gradient(135deg,#1a1412,#2a2118,#1a1412);
  border:1px solid rgba(191,161,103,0.2);border-left:4px solid var(--accent,#bfa167);
  border-radius:16px;padding:26px 24px;margin-bottom:18px}
.ph .eyebrow{font-size:12px;letter-spacing:3px;text-transform:uppercase;font-weight:700;color:var(--accent,#bfa167);margin-bottom:10px}
.ph h1{font-size:32px;font-weight:850;letter-spacing:1px;color:#f0e6d2}
.ph .lead{font-size:15px;color:#cdbd9c;margin-top:12px}
.ph .lead b{color:#f0e6d2}

.card{background:#1a1412;border:1px solid rgba(191,161,103,0.16);border-radius:14px;padding:20px 22px;margin-bottom:14px;scroll-margin-top:72px}
.card:target{box-shadow:0 0 0 2px #d4b87a inset, 0 10px 28px rgba(0,0,0,0.35)}
.card h2{font-size:16px;font-weight:800;color:var(--accent,#bfa167);margin-bottom:10px;display:flex;align-items:center;gap:8px}
.card p{font-size:14px;color:#b7a888;margin-bottom:10px}
.card p:last-child{margin-bottom:0}
.card p b,.card li b{color:#e8dcc8}
.card .accent{color:var(--accent,#bfa167);font-weight:700}

.card ul{list-style:none;margin:0}
.card li{font-size:14px;color:#b7a888;padding:8px 0 8px 26px;position:relative;border-bottom:1px solid rgba(191,161,103,0.08)}
.card li:last-child{border-bottom:none}
.card li::before{content:"";position:absolute;left:4px;top:15px;width:8px;height:8px;border-radius:2px;background:var(--accent,#bfa167)}

.callout{background:rgba(191,161,103,0.06);border:1px dashed rgba(191,161,103,0.35);border-radius:12px;padding:14px 18px;margin-bottom:14px;font-size:13.5px;color:#cdbd9c}
.callout b{color:#f0e6d2}
.callout.rule{border-style:solid;border-color:rgba(191,161,103,0.28);border-left:4px solid var(--accent,#bfa167);background:rgba(191,161,103,0.08);color:#e8dcc8;font-size:14px}
.callout.rule .lbl{color:var(--accent,#bfa167);font-weight:800}

/* 一句話定義 */
.tldr{border-left:3px solid var(--accent,#bfa167);background:rgba(191,161,103,0.05);border-radius:0 10px 10px 0;padding:12px 16px;margin-bottom:14px;font-size:15px;font-weight:700;color:#f0e6d2}
.tldr .lbl{color:var(--accent,#bfa167);font-weight:800;margin-right:6px}

/* 位置指示器（六大面向第幾格，由 nav.js 注入） */
.stepper{display:flex;align-items:center;gap:6px;margin-top:16px;flex-wrap:wrap}
.stepper .s{width:9px;height:9px;border-radius:3px;opacity:0.5}
.stepper .s.on{width:auto;height:auto;opacity:1;padding:3px 11px;border-radius:999px;font-size:11px;font-weight:800;color:#0e0b09}

.pnav{display:flex;justify-content:space-between;gap:12px;margin-top:22px}
.pnav a{flex:1;padding:14px 16px;background:#1a1412;border:1px solid rgba(191,161,103,0.18);border-radius:12px;font-size:13px;color:#b7a888;font-weight:600;transition:.18s}
.pnav a:hover{border-color:var(--accent,#bfa167);color:#e8dcc8}
.pnav a.next{text-align:right}
.pnav a .k{display:block;font-size:11px;color:#6b5e42;margin-bottom:3px;letter-spacing:1px}

/* 系統圖（範例頁嵌入首頁那張水庫工程圖） */
@keyframes flowdash{to{stroke-dashoffset:-32}}
@keyframes wave{to{transform:translateX(40px)}}
@keyframes drip{0%{transform:translateY(0);opacity:0}20%{opacity:.9}100%{transform:translateY(26px);opacity:0}}
.flow{stroke-dasharray:8 10;animation:flowdash 1s linear infinite}
.wave{animation:wave 2.6s linear infinite}
.drip{animation:drip 1.3s ease-in infinite}
.hot{cursor:pointer}
.hot rect{fill:transparent;stroke:transparent;stroke-width:2;transition:fill .18s,stroke .18s}
.hot:hover rect{fill:rgba(212,184,122,0.12);stroke:rgba(212,184,122,0.6)}
.hot:hover text{fill:#fff}
@media (prefers-reduced-motion: reduce){.flow,.wave,.drip{animation:none}}
.diagram-panel{background:linear-gradient(180deg,#2b2219,#241d16);border:1px solid rgba(191,161,103,0.18);border-radius:14px;padding:16px;margin-bottom:16px}
.diagram-panel .dtitle{font-size:14px;font-weight:800;color:#e8dcc8;text-align:center;margin-bottom:8px}
.diagram-panel svg{width:100%;max-width:640px;height:auto;display:block;margin:0 auto}
.diagram-cap{font-size:12px;color:#8a7a5a;text-align:center;margin-top:8px}

/* 可複用元件（範例頁與各分頁共用） */
.stat{display:inline-flex;align-items:baseline;gap:4px;background:rgba(191,161,103,0.08);border:1px solid rgba(191,161,103,0.28);border-radius:8px;padding:3px 10px;margin:3px 5px 3px 0;font-size:15px;font-weight:800;color:#f0e6d2}
.stat small{font-size:11px;color:#8a7a5a;font-weight:600}
.callout.warn{border-style:solid;border-color:rgba(201,134,110,0.5);background:rgba(201,134,110,0.08);color:#d8c3b4}
.callout.warn b{color:#f4e7dd}
.crosslinks{display:flex;flex-wrap:wrap;gap:8px;margin-top:4px}
.crosslinks a{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;font-weight:700;color:#cdbd9c;background:#1a1412;border:1px solid rgba(191,161,103,0.2);border-radius:999px;padding:7px 13px}
.crosslinks a:hover{border-color:var(--accent,#bfa167);color:#f0e6d2}
.crosslinks .dot{width:9px;height:9px;border-radius:3px;flex:0 0 auto}
.persona{display:flex;flex-wrap:wrap;gap:10px 22px;background:rgba(191,161,103,0.05);border:1px solid rgba(191,161,103,0.2);border-radius:12px;padding:14px 18px;margin-bottom:14px}
.persona .who{font-size:15px;font-weight:800;color:#f0e6d2;width:100%}
.persona .kv{font-size:13px;color:#b7a888}
.persona .kv b{color:#e8dcc8}

.foot{text-align:center;font-size:11px;color:#6b5e42;margin-top:30px}