*{box-sizing:border-box;margin:0;padding:0}:root{--bg:#0f172a;--surface:#1e293b;--surface-2:#273549;--border:#334155;--text:#e2e8f0;--muted:#94a3b8;--accent:#38bdf8;--accent-strong:#0ea5e9;--danger:#f87171;--success:#4ade80;--warning:#fbbf24}body{font-family:-apple-system,Noto Sans TC,PingFang TC,system-ui,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}a{color:var(--accent);text-decoration:none}h1{font-size:1.6rem}h2{font-size:1.2rem;margin-bottom:12px}main.center{max-width:880px;margin:0 auto;padding:64px 24px}.public-header{display:flex;justify-content:space-between;align-items:center;padding:14px 32px;border-bottom:1px solid var(--border)}.public-header .brand{font-size:1.4rem;color:var(--accent);font-weight:700}.public-header nav{display:flex;gap:20px;align-items:center}.public-main{max-width:1100px;margin:0 auto;padding:36px 32px}.public-footer{padding:28px 32px;text-align:center;border-top:1px solid var(--border);margin-top:60px;font-size:.85rem}.hero h1{font-size:2rem;margin-bottom:8px}.hero .lead{color:var(--muted);margin-bottom:16px}.filter-chips{display:flex;gap:8px;margin:24px 0 8px;flex-wrap:wrap;align-items:center}.filter-chips .label{color:var(--muted);font-size:.85rem;margin-right:8px}.filter-chips a{padding:6px 14px;border-radius:999px;background:var(--surface);border:1px solid var(--border);color:var(--text);font-size:.85rem}.filter-chips a.active{background:var(--accent-strong);color:#03263a;border-color:var(--accent-strong);font-weight:600}.course-section h2{font-size:1.15rem;color:var(--accent);margin:32px 0 12px;border-left:3px solid var(--accent);padding-left:10px}.course-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));grid-gap:16px;gap:16px}.course-card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:20px;transition:border-color .15s;text-decoration:none;color:var(--text);display:block}.course-card:hover{border-color:var(--accent)}.course-card h3{font-size:1.05rem;margin-bottom:8px}.course-card .meta{font-size:.82rem;color:var(--muted);margin-bottom:14px}.course-card .next{font-size:.82rem;color:var(--accent)}.session-card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:18px;margin-bottom:12px}.session-card .row1{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}.session-card .price{font-size:1.25rem;color:var(--accent);font-weight:700}.session-card .meta{color:var(--muted);font-size:.85rem;margin-top:6px}.session-card .seats{font-size:.85rem}.section-fieldset{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:20px;margin-bottom:16px}.section-fieldset legend{color:var(--accent);font-weight:600;margin-bottom:6px}.captcha-row{display:flex;gap:12px;align-items:flex-end}.captcha-challenge{background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:9px 14px;font-family:monospace;font-size:1rem;letter-spacing:2px}.shell{display:flex;min-height:100vh}.sidebar{width:220px;background:var(--surface);border-right:1px solid var(--border);padding:24px 16px;flex-shrink:0}.sidebar .brand{font-size:1.3rem;font-weight:700;color:var(--accent);margin-bottom:4px}.sidebar .tagline{font-size:.75rem;color:var(--muted);margin-bottom:24px}.sidebar nav a{display:block;padding:9px 12px;border-radius:8px;color:var(--text);margin-bottom:4px}.sidebar nav a:hover{background:var(--surface-2)}.sidebar nav a.active{background:var(--accent-strong);color:#03263a;font-weight:600}.content{flex:1 1;padding:32px 40px;overflow-x:auto}.topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}.topbar .user{font-size:.85rem;color:var(--muted)}.card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:20px;margin-bottom:16px}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));grid-gap:16px;gap:16px}.stat{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:20px}.stat .num{font-size:2rem;font-weight:700;color:var(--accent)}.stat .label,label{font-size:.85rem;color:var(--muted)}label{display:block;margin:12px 0 4px}.input,select,textarea{width:100%;background:var(--bg);border:1px solid var(--border);border-radius:8px;color:var(--text);padding:9px 11px;font-size:.9rem;font-family:inherit}textarea{min-height:70px;resize:vertical}.btn{display:inline-block;background:var(--surface-2);border:1px solid var(--border);color:var(--text);border-radius:8px;padding:8px 16px;font-size:.88rem;cursor:pointer;font-family:inherit}.btn:hover{border-color:var(--accent)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--accent-strong);border-color:var(--accent-strong);color:#03263a;font-weight:600}.btn-sm{padding:4px 10px;font-size:.78rem}table.table{width:100%;border-collapse:collapse;font-size:.88rem}table.table td,table.table th{text-align:left;padding:10px 12px;border-bottom:1px solid var(--border)}table.table th{color:var(--muted);font-weight:600}.badge{display:inline-block;padding:2px 9px;border-radius:999px;font-size:.75rem;font-weight:600}.badge.waitlist{background:#2e1065;color:#c4b5fd}.badge.pending{background:#422006;color:var(--warning)}.badge.paid{background:#0c2a4d;color:var(--accent)}.badge.completed{background:#052e16;color:var(--success)}.badge.cancelled{background:#3f1d1d;color:var(--danger)}.msg-error{color:var(--danger)}.msg-error,.msg-ok{font-size:.85rem;margin:8px 0}.msg-ok{color:var(--success)}.muted{color:var(--muted)}.row{display:flex;gap:12px;flex-wrap:wrap;align-items:flex-end}.row>div{flex:1 1;min-width:140px}