:root{--bg: #0b0f1a;--bg-2: #111827;--bg-3: #1a2332;--border: #232e42;--text: #e6edf7;--text-dim: #8b9bb4;--accent: #4f8cff;--accent-2: #22d3ee;--danger: #f87171;--ok: #34d399;--radius: 12px;--maxw: 640px}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%}body{background:radial-gradient(1200px 600px at 50% -10%,#16233c 0%,var(--bg) 55%);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;-webkit-font-smoothing:antialiased}a{color:var(--accent);text-decoration:none}button{font:inherit;cursor:pointer}input,textarea{font:inherit}.app{min-height:100%;display:flex;flex-direction:column}.topbar{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;border-bottom:1px solid var(--border);position:sticky;top:0;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#0b0f1abf;z-index:20}.brand{font-weight:700;font-size:17px;color:var(--text);letter-spacing:.2px}.topbar nav{display:flex;gap:14px;align-items:center;font-size:14px}.main{flex:1;width:100%;max-width:var(--maxw);margin:0 auto;padding:20px 16px 40px}.hero{text-align:center;padding:48px 0 28px}.hero h1{font-size:30px;font-weight:800;background:linear-gradient(90deg,var(--accent),var(--accent-2));-webkit-background-clip:text;background-clip:text;color:transparent}.hero p{color:var(--text-dim);margin-top:10px;font-size:15px;line-height:1.6}.hero .e2ee-badge{display:inline-block;margin-top:14px;padding:5px 12px;border-radius:999px;border:1px solid rgba(52,211,153,.4);color:var(--ok);font-size:12px;letter-spacing:.5px}.actions{display:flex;flex-direction:column;gap:14px;padding:12px 0}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 20px;border-radius:var(--radius);border:1px solid var(--border);background:var(--bg-3);color:var(--text);font-size:16px;font-weight:600;transition:transform .06s,box-shadow .15s,border-color .15s}.btn:active{transform:scale(.98)}.btn-primary{background:linear-gradient(135deg,var(--accent),#3b6fd6);border:none;color:#fff;box-shadow:0 6px 24px #4f8cff59}.btn-ghost{background:transparent}.btn-small{padding:7px 14px;font-size:13px;border-radius:9px}.btn-danger{background:#f871711f;border-color:#f8717166;color:var(--danger)}.btn:disabled{opacity:.5;cursor:not-allowed}.features{display:grid;gap:12px;margin-top:26px}.feature{border:1px solid var(--border);border-radius:var(--radius);padding:16px;background:#1a233280}.feature h3{font-size:15px;margin-bottom:6px;color:var(--accent-2)}.feature p{font-size:13.5px;color:var(--text-dim);line-height:1.6}.card{border:1px solid var(--border);border-radius:14px;padding:20px;background:#111827cc}.field{margin-bottom:14px}.field label{display:block;font-size:13px;color:var(--text-dim);margin-bottom:6px}.input,textarea.input{width:100%;padding:12px 14px;border-radius:10px;border:1px solid var(--border);background:var(--bg);color:var(--text);outline:none;font-size:15px}.input:focus{border-color:var(--accent);box-shadow:0 0 0 3px #4f8cff26}.tabs{display:flex;gap:6px;margin-bottom:18px;background:var(--bg);border-radius:10px;padding:4px}.tab{flex:1;padding:9px;border:none;background:transparent;color:var(--text-dim);border-radius:8px;font-size:14px;font-weight:600}.tab.active{background:var(--bg-3);color:var(--text)}.hint{font-size:12.5px;color:var(--text-dim);margin-top:6px}.error{color:var(--danger);font-size:13px;margin-top:8px}.ok{color:var(--ok);font-size:13px;margin-top:8px}.countdown{color:var(--accent-2);font-weight:600}.chat-page{display:flex;flex-direction:column;height:calc(100vh - 118px);height:calc(100dvh - 118px);min-height:420px}.chat-head{display:flex;align-items:center;gap:10px;padding:10px 4px;border-bottom:1px solid var(--border);font-size:14px}.chat-head .title{font-weight:700;font-size:15px;flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.chat-head .sub{color:var(--text-dim);font-size:12px}.presence-dot{width:8px;height:8px;border-radius:50%;background:var(--text-dim);flex:none}.presence-dot.online{background:var(--ok);box-shadow:0 0 8px #34d399b3}.msg-list{flex:1;overflow-y:auto;padding:12px 2px;display:flex;flex-direction:column;gap:10px}.msg{display:flex;flex-direction:column;max-width:82%}.msg.own{align-self:flex-end;align-items:flex-end}.msg.other{align-self:flex-start;align-items:flex-start}.bubble{padding:10px 14px;border-radius:14px;font-size:15px;line-height:1.5;word-break:break-word;white-space:pre-wrap;border:1px solid var(--border)}.msg.own .bubble{background:linear-gradient(135deg,#2a4a8f,#24407c);border-color:#4f8cff59}.msg.other .bubble{background:var(--bg-3)}.msg .meta{font-size:11px;color:var(--text-dim);margin-top:4px;padding:0 4px;display:flex;gap:6px;align-items:center}.msg .read{color:var(--accent-2)}.msg .sys{color:var(--text-dim);font-size:12.5px;text-align:center;padding:8px 0}.msg .sender{font-size:11.5px;color:var(--accent-2);margin-bottom:3px}.msg.attachment .bubble{border-style:dashed}.attach-chip{display:flex;align-items:center;gap:8px;padding:4px 0;font-size:13px;color:var(--accent-2)}.input-row{display:flex;gap:8px;padding:10px 0 0;border-top:1px solid var(--border)}.input-row textarea{flex:1;resize:none;max-height:120px;min-height:44px;padding:11px 14px;border-radius:12px;border:1px solid var(--border);background:var(--bg-3);color:var(--text);outline:none;font-size:15px}.input-row .send{width:52px;flex:none}.rooms{display:flex;flex-direction:column;gap:8px}.room-item{display:flex;align-items:center;gap:12px;padding:13px 14px;border:1px solid var(--border);border-radius:var(--radius);background:var(--bg-3);cursor:pointer;transition:border-color .12s}.room-item:hover{border-color:var(--accent)}.room-item .avatar{width:40px;height:40px;border-radius:50%;flex:none;background:linear-gradient(135deg,var(--accent),var(--accent-2));display:flex;align-items:center;justify-content:center;font-weight:700;color:#fff}.room-item .name{font-weight:600;font-size:15px;flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.room-item .badge{background:var(--accent);color:#fff;border-radius:999px;font-size:11px;padding:2px 8px;min-width:20px;text-align:center}.room-item .time{font-size:11px;color:var(--text-dim)}.admin-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}.stat{border:1px solid var(--border);border-radius:var(--radius);padding:14px;background:var(--bg-3)}.stat .num{font-size:24px;font-weight:800;color:var(--accent-2)}.stat .label{font-size:12px;color:var(--text-dim);margin-top:4px}table.list{width:100%;border-collapse:collapse;font-size:13px;margin-top:14px}table.list th,table.list td{padding:9px 8px;border-bottom:1px solid var(--border);text-align:left}table.list th{color:var(--text-dim);font-weight:600;font-size:12px}.boot{height:100%;display:flex;align-items:center;justify-content:center}.spinner{width:34px;height:34px;border-radius:50%;border:3px solid var(--border);border-top-color:var(--accent);animation:spin .9s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.about h1{font-size:22px;margin-bottom:12px}.about h2{font-size:17px;margin:20px 0 8px;color:var(--accent-2)}.about p,.about li{font-size:14.5px;line-height:1.75;color:#c6d2e4}.about ul{padding-left:20px;margin:8px 0}.about code{background:var(--bg-3);padding:2px 6px;border-radius:5px;font-size:13px}.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.mono-block{background:var(--bg);border:1px solid var(--border);border-radius:10px;padding:12px;font-size:12.5px;word-break:break-all;line-height:1.6;-webkit-user-select:all;user-select:all}.copy-btn{margin-top:8px}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0009;z-index:50;display:flex;align-items:center;justify-content:center;padding:20px}.modal{background:var(--bg-2);border:1px solid var(--border);border-radius:14px;padding:20px;width:100%;max-width:420px}.btn-accent{background:linear-gradient(135deg,var(--accent-2, #7c5cff),var(--accent, #4f8cff));color:#fff;border:none}.invite-line{background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:8px 10px;margin-top:4px}.invite-code{font-size:13px;color:var(--text);-webkit-user-select:all;user-select:all}.invite-code-big{font-size:26px;font-weight:700;letter-spacing:6px;color:var(--accent-2, #7c5cff)}@media (max-width: 640px){.main{padding:14px 12px 30px}.chat-page{height:calc(100vh - 106px);height:calc(100dvh - 106px)}}