:root{--bg: #0f1218;--panel: #171c26;--panel2: #1f2633;--border: #2a3345;--text: #e6e9ef;--muted: #9aa4b5;--accent: #5b8cff;--accent2: #7c5bff;--ok: #3ecf8e;--warn: #f5a623;--danger: #ff6b6b;--radius: 12px}*{box-sizing:border-box}html,body{margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:PingFang SC,Microsoft YaHei,system-ui,-apple-system,sans-serif;font-size:15px}a{color:var(--accent);text-decoration:none}.shell{min-height:100vh;display:flex;flex-direction:column}.topbar{display:flex;align-items:center;gap:12px;padding:12px 24px;background:var(--panel);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10}.brand{font-weight:700;font-size:17px;color:var(--text)}.spacer{flex:1}.main{flex:1;padding:24px;max-width:1100px;width:100%;margin:0 auto}.card{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:20px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;background:var(--accent);color:#fff;border:none;padding:10px 18px;border-radius:8px;font-size:14px;cursor:pointer;transition:filter .15s}.btn:hover{filter:brightness(1.1)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn.ghost{background:transparent;border:1px solid var(--border);color:var(--text)}.btn.small{padding:6px 12px;font-size:13px}.btn.danger{background:var(--danger)}input,textarea,select{background:var(--panel2);color:var(--text);border:1px solid var(--border);border-radius:8px;padding:10px 12px;font-size:14px;outline:none;width:100%}input:focus,textarea:focus{border-color:var(--accent)}.chip{display:inline-flex;align-items:center;background:var(--panel2);border:1px solid var(--border);border-radius:999px;padding:4px 12px;font-size:13px;color:var(--text)}.tier-badge{font-size:12px;border-radius:6px;padding:2px 8px}.tier-none{background:#3ecf8e26;color:var(--ok)}.tier-optional-user{background:#5b8cff26;color:var(--accent)}.tier-required-user{background:#f5a62326;color:var(--warn)}.muted{color:var(--muted)}.error{color:var(--danger);font-size:13px;margin-top:8px}.row{display:flex;gap:12px;align-items:center}.col{display:flex;flex-direction:column;gap:12px}.gate-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;background:radial-gradient(1200px 600px at 50% -10%,rgba(91,140,255,.18),transparent),var(--bg);padding:24px}.gate-card{width:100%;max-width:420px;text-align:center}.gate-card h1{margin:8px 0 4px;font-size:24px}.gate-card .sub{color:var(--muted);margin-bottom:24px;font-size:14px}.lock-icon{width:64px;height:64px;margin:0 auto;border-radius:18px;background:linear-gradient(135deg,var(--accent),var(--accent2));display:flex;align-items:center;justify-content:center;font-size:30px}.grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}.service-card{display:flex;flex-direction:column;gap:10px;cursor:pointer;transition:transform .12s,border-color .12s}.service-card:hover{transform:translateY(-2px);border-color:var(--accent)}.service-icon{width:44px;height:44px;border-radius:10px;font-size:22px;display:flex;align-items:center;justify-content:center;background:var(--panel2)}.service-card h3{margin:0;font-size:16px}.service-card p{margin:0;color:var(--muted);font-size:13px;flex:1}.form{display:flex;flex-direction:column;gap:12px}.form label{font-size:13px;color:var(--muted)}.chat-layout{display:grid;grid-template-columns:220px 1fr;gap:16px;height:calc(100vh - 160px);min-height:480px}.chat-side{overflow-y:auto}.chat-main{display:flex;flex-direction:column}.msg-list{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:8px;padding:8px 0}.msg{max-width:75%;padding:8px 12px;border-radius:10px;background:var(--panel2);font-size:14px}.msg .who{font-size:12px;color:var(--muted);margin-bottom:2px}.msg.mine{align-self:flex-end;background:#5b8cff40}.chat-input{display:flex;gap:8px;margin-top:8px}.user-item{display:flex;align-items:center;justify-content:space-between;padding:8px 10px;border-radius:8px;cursor:pointer;font-size:14px}.user-item:hover,.user-item.active{background:var(--panel2)}.ai-layout{display:flex;flex-direction:column;height:calc(100vh - 160px);min-height:480px}.ai-msgs{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:12px;padding:8px 0}.ai-msg{padding:10px 14px;border-radius:10px;max-width:85%;white-space:pre-wrap;word-break:break-word}.ai-msg.user{align-self:flex-end;background:#5b8cff38}.ai-msg.assistant{align-self:flex-start;background:var(--panel2)}.reader-layout{display:grid;grid-template-columns:260px 1fr;gap:16px;height:calc(100vh - 160px);min-height:480px}.chapter-list{overflow-y:auto}.chapter-item{padding:8px 10px;border-radius:8px;cursor:pointer;font-size:13px;color:var(--muted)}.chapter-item:hover{background:var(--panel2)}.chapter-item.active{background:var(--panel2);color:var(--text)}.reader-pane{display:flex;flex-direction:column;overflow:hidden}.reader-content{flex:1;overflow-y:auto;padding:24px 28px;line-height:1.9;font-size:17px;white-space:pre-wrap}.reader-bar{display:flex;align-items:center;gap:12px;padding-bottom:12px}.book-list{display:flex;flex-direction:column;gap:10px}.book-item{display:flex;align-items:center;gap:12px;cursor:pointer}.book-item:hover{border-color:var(--accent)}.notice{background:#f5a6231a;border:1px solid rgba(245,166,35,.35);color:var(--warn);border-radius:8px;padding:10px 14px;font-size:13px}@media (max-width: 760px){.chat-layout,.reader-layout{grid-template-columns:1fr;height:auto}.chat-side,.chapter-list{max-height:200px}}