:root{--bg:#f7f7f8;--card:#fff;--text:#1f2329;--muted:#8a919c;--primary:#07c160;--danger:#e64340;--strong:#07c160;--mid:#f0a020;--weak:#c0c4cc}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0;font-family:-apple-system,BlinkMacSystemFont,PingFang SC,Helvetica Neue,sans-serif;line-height:1.6}.page{max-width:480px;margin:0 auto;padding:24px 16px 48px}h1{margin:8px 0;font-size:22px}h2{align-items:center;gap:8px;margin:24px 0 8px;font-size:16px;display:flex}.lead,.desc{color:var(--text);margin:8px 0}.hint,.breadcrumb,.meta{color:var(--muted);font-size:13px}.target{background:#fff7e6;border-radius:8px;padding:8px 12px;font-size:14px}.howto{color:var(--muted);padding-left:20px;font-size:14px}.error{color:var(--danger);font-size:14px}.form{flex-direction:column;gap:14px;margin-top:12px;display:flex}.form label{color:var(--text);flex-direction:column;gap:6px;font-size:14px;display:flex}input,textarea{background:var(--card);border:1px solid #e0e3e8;border-radius:8px;padding:10px 12px;font-family:inherit;font-size:15px}button{background:var(--card);color:var(--text);border:1px solid #e0e3e8;border-radius:8px;padding:10px 16px;font-size:15px}button.primary,.button.primary{background:var(--primary);border-color:var(--primary);color:#fff;text-align:center;text-decoration:none;display:inline-block}button:disabled{opacity:.6}button.outline,.button.outline{border-color:var(--primary);width:100%;color:var(--primary);text-align:center;background:#fff;display:block}.home-share{margin-top:10px}.actions{flex-direction:column;gap:10px;margin-top:8px;display:flex}.strength-group{gap:8px;display:flex}.chip{border-radius:999px;padding:6px 12px;font-size:13px}.chip.active{border-color:var(--primary);color:var(--primary);background:#e8f9f0}.panel{background:var(--card);border-radius:12px;margin-top:16px;padding:16px;box-shadow:0 1px 3px #0000000d}.panel.success h3{color:var(--primary)}.share-url{word-break:break-all;background:var(--bg);border-radius:8px;padding:8px 12px;font-size:13px}.chain{margin:8px 0;padding:0;list-style:none}.chain-node{border-left:2px solid #eceef1;margin-left:4px;padding:5px 0 5px 12px}.chain-row{align-items:center;gap:8px;display:flex}.chain-name{text-align:left;flex:1;font-size:15px}.chain-tag{color:var(--primary);margin-left:6px;font-size:12px;font-style:normal}.chain-strength{text-align:center;color:#fff;border-radius:4px;flex-shrink:0;width:24px;padding:1px 0;font-size:12px}.chain-strength.strength-3{background:var(--strong)}.chain-strength.strength-2{background:var(--mid)}.chain-strength.strength-1{background:var(--weak)}.chain-note{color:var(--muted);margin-top:2px;font-size:13px;display:block}.badges{align-items:center;gap:8px;margin:0 0 4px;display:flex}.badge{color:#3a6df0;background:#e8f0fe;border-radius:4px;padding:1px 8px;font-size:12px}.badge.strong{color:var(--primary);background:#e8f9f0}.badge.rec{background:var(--primary);color:#fff}.chain-card.top,.branch-card.top{border:1px solid var(--primary);box-shadow:0 0 0 3px #07c1601f}.end-btn{color:var(--danger);border-color:#f0c0c0;margin-top:4px}.panel.stopped{background:#fbfbfc;border:1px dashed #d0d3d8}.panel.stopped h3{color:var(--muted);margin-top:0}.contact{border-top:1px dashed #e0e3e8;padding-top:8px;font-size:14px}button.copied{border-color:var(--primary)!important;color:var(--primary)!important;background:#e8f9f0!important}.center{text-align:center}a{color:var(--primary)}.privacy-note{color:#3a4a63;background:#f3f8ff;border:1px solid #dbeafe;border-radius:8px;margin-bottom:12px;padding:10px 12px;font-size:13px;line-height:1.5}.privacy-note.small{background:#fafbfc;border-color:#eceef1;margin:-4px 0 0}.reward-tag{border-radius:8px;flex-wrap:wrap;align-items:center;gap:8px;margin:8px 0;padding:8px 12px;font-size:14px;display:flex}.reward-tag.paid{color:#b26a00;background:#fff7e6}.reward-tag.friendship{color:#c2185b;background:#fff0f3}.reward-note{color:var(--text);font-size:13px}.share-text{white-space:pre-wrap;word-break:break-all;background:var(--bg);border-radius:8px;margin:8px 0 12px;padding:12px;font-family:inherit;font-size:13px;line-height:1.6}.branch-card.achieved{border:1px solid var(--primary)}.branch-head{align-items:center;gap:8px;margin:0;display:flex}.branch-head .chain-name{font-weight:600}.feature-list{margin:8px 0 20px;padding:0;list-style:none}.feature-list li{background:var(--card);border-radius:10px;margin-bottom:10px;padding:12px 14px;font-size:14px;box-shadow:0 1px 3px #0000000d}.demo-chain{margin:20px 0 28px}.demo-node{opacity:0;animation:.5s forwards demo-pop;animation-delay:calc(var(--i) * .7s);transform:translateY(8px)}.demo-link{background:linear-gradient(to bottom, transparent, var(--primary));opacity:0;width:2px;height:18px;animation:.4s forwards demo-fade;animation-delay:calc(var(--i) * .7s - .2s);margin-left:18px;display:block}.demo-card{background:var(--card);border-radius:12px;flex-direction:column;padding:12px 14px;display:flex;box-shadow:0 1px 3px #0000000f}.demo-name{font-size:15px;font-weight:600}.demo-role{color:var(--muted);font-size:13px}@keyframes demo-pop{to{opacity:1;transform:translateY(0)}}@keyframes demo-fade{to{opacity:1}}@media (prefers-reduced-motion:reduce){.demo-node,.demo-link{opacity:1;animation:none;transform:none}}.demo-case{margin-top:12px}.demo-title{margin:0 0 8px;font-weight:600}.poster-block{text-align:center;flex-direction:column;align-items:center;gap:6px;margin-top:14px;display:flex}.poster{border-radius:12px;width:100%;max-width:300px;box-shadow:0 2px 8px #0000001a}.poster-placeholder{aspect-ratio:3/4;background:#f0f1f3;border-radius:12px;width:100%;max-width:300px}.share-fallback{margin-top:12px}.share-fallback summary{cursor:pointer}.page.wide{max-width:640px}.desc.small{color:var(--muted);font-size:13px}.stat-grid{grid-template-columns:repeat(4,1fr);gap:8px;margin:12px 0;display:grid}.stat-card{background:var(--card);text-align:center;border-radius:10px;padding:12px 6px;box-shadow:0 1px 3px #0000000d}.stat-num{color:var(--primary);font-size:22px;font-weight:700;display:block}.stat-label{color:var(--muted);font-size:12px}.g-switch{gap:6px;margin-left:auto;display:inline-flex}.barchart{width:100%;height:auto}.bar-req{fill:#3a6df0}.bar-ok{fill:var(--primary)}.bc-axis{fill:var(--muted);font-size:9px}.legend{color:var(--muted);align-items:center;gap:6px;font-size:12px;display:flex}.legend .dot{border-radius:2px;width:10px;height:10px;margin-left:8px;display:inline-block}.legend .dot.req{background:#3a6df0}.legend .dot.ok{background:var(--primary)}.admin-chain{margin:4px 0;font-size:13px}.admin-table{border-collapse:collapse;width:100%;margin-top:8px;font-size:13px}.admin-table th,.admin-table td{text-align:left;border-bottom:1px solid #eceef1;padding:6px 8px}.admin-table th{color:var(--muted);font-weight:500}details summary{cursor:pointer;margin-top:8px}