:root{--bg:#09090b;--bg2:#0f0f13;--surface:#141419;--surface2:#1a1a22;--surface3:#22222e;--surface4:#2a2a38;--border:rgba(255,255,255,.06);--border2:rgba(255,255,255,.10);--border3:rgba(255,255,255,.14);--G:#f0f0f5;--text2:#9494a8;--text3:#5c5c72;--accent:#7c6cf0;--accent2:#9b8df7;--accent-dim:rgba(124,108,240,.10);--green:#34d399;--green-dim:rgba(52,211,153,.10);--red:#f87171;--red-dim:rgba(248,113,113,.10);--yellow:#fbbf24;--yellow-dim:rgba(251,191,36,.10);--cyan:#22d3ee;--cyan-dim:rgba(34,211,238,.10);--orange:#fb923c;--radius:10px;--radius-sm:6px;--shadow:0 1px 3px rgba(0,0,0,.4);--shadow-lg:0 8px 32px rgba(0,0,0,.5);--transition:.15s ease;--transition-slow:.3s ease;--topbar-h:52px}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,'Inter','Segoe UI',sans-serif;background:var(--bg);color:var(--G);min-height:100vh;font-size:14px;line-height:1.5;-webkit-font-smoothing:antialiased}

/* ═══ Custom Scrollbar ═══ */
::-webkit-scrollbar{width:6px;height:6px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--surface3);border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:var(--surface4)}
*{scrollbar-width:thin;scrollbar-color:var(--surface3) transparent}

/* ═══ Login / Register / Forgot / Reset ═══ */
.auth-overlay{position:fixed;inset:0;background:#0a0a1a;display:flex;align-items:center;justify-content:center;z-index:200;transition:opacity .4s ease;overflow:hidden}
.auth-overlay.hide{opacity:0;pointer-events:none}
#authParticles{position:absolute;inset:0;z-index:0;width:100%;height:100%}
.auth-card{position:relative;z-index:1;background:rgba(20,20,40,.65);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid rgba(124,108,240,.2);border-radius:20px;padding:40px;width:420px;box-shadow:0 8px 32px rgba(0,0,0,.3),0 0 60px rgba(124,108,240,.1);transition:transform .1s ease-out;animation:cardIn .5s cubic-bezier(.16,1,.3,1)}

.auth-brand{display:flex;align-items:center;gap:10px;margin-bottom:28px;justify-content:center}
.auth-brand .icon{font-size:28px}.auth-brand .text{font-size:18px;font-weight:700}
.auth-brand .ver{font-size:9px;background:var(--accent-dim);color:var(--accent2);padding:1px 6px;border-radius:4px;font-weight:600}
.form-group{margin-bottom:14px}
.form-group label{display:block;font-size:12px;color:var(--text3);margin-bottom:4px;font-weight:500}
.form-group input{width:100%;padding:9px 12px;border-radius:var(--radius-sm);border:1px solid var(--border2);background:var(--bg2);color:var(--G);font-size:13px;font-family:inherit;transition:border-color var(--transition),box-shadow var(--transition)}
.form-group input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(124,108,240,.2),0 0 20px rgba(124,108,240,.15)}
.auth-error{color:var(--red);font-size:13px;min-height:20px;margin-bottom:8px;text-align:center}
.auth-success{background:var(--green-dim);border:1px solid rgba(52,211,153,.2);border-radius:var(--radius-sm);padding:12px;margin-bottom:8px}
.auth-success .title{font-size:13px;color:var(--green);font-weight:600}
.auth-success .msg{font-size:12px;color:var(--text2);margin-top:4px}
.auth-switch{text-align:center;margin-top:14px;font-size:13px;color:var(--text2)}
.auth-switch a{color:var(--accent2);cursor:pointer;text-decoration:none}
.auth-switch a:hover{text-decoration:underline}
.forgot-link{text-align:right;margin-top:-4px;margin-bottom:10px}
.forgot-link a{font-size:12px;color:var(--text3);cursor:pointer;text-decoration:none}
.forgot-link a:hover{color:var(--accent2)}
.btn{padding:8px 16px;border-radius:var(--radius-sm);border:none;cursor:pointer;font-size:13px;font-weight:500;transition:all var(--transition);font-family:inherit}
.btn-primary{background:linear-gradient(135deg,var(--accent) 0%,var(--accent2) 100%);color:#fff;width:100%;padding:10px;font-size:14px;font-weight:600;transition:all .3s}
.btn-primary:hover{background:linear-gradient(135deg,var(--accent2) 0%,var(--accent) 100%);transform:translateY(-2px);box-shadow:0 4px 16px rgba(124,108,240,.4)}
.btn-primary:disabled{opacity:.5;cursor:not-allowed;transform:none}
.btn-ghost{background:transparent;border:1px solid var(--border2);color:var(--text2)}
.btn-ghost:hover{color:var(--G);background:var(--surface2);border-color:var(--border3)}
.btn-sm{padding:5px 12px;font-size:12px}
.btn-danger{background:var(--red-dim);color:var(--red);border:1px solid rgba(248,113,113,.2)}
.btn-danger:hover{background:rgba(248,113,113,.2)}

/* ═══ Topbar ═══ */
.topbar{position:fixed;top:0;left:0;right:0;height:var(--topbar-h);background:var(--bg2);border-bottom:1px solid var(--border);display:flex;align-items:center;padding:0 20px;z-index:100;gap:6px}
.topbar-brand{display:flex;align-items:center;gap:8px;font-weight:700;font-size:15px;margin-right:16px}
.topbar-brand .icon{font-size:20px}
.topbar-nav{display:flex;gap:2px;flex:1}
.topbar-nav a{display:flex;align-items:center;gap:6px;padding:7px 14px;border-radius:var(--radius-sm);color:var(--text2);text-decoration:none;font-size:13px;font-weight:500;cursor:pointer;transition:all var(--transition)}
.topbar-nav a:hover{color:var(--G);background:var(--surface)}
.topbar-nav a.active{color:var(--G);background:var(--accent-dim);font-weight:600}
.topbar-right{display:flex;align-items:center;gap:10px}
.balance-badge{background:var(--accent-dim);color:var(--accent2);padding:4px 12px;border-radius:20px;font-size:12px;font-weight:600;white-space:nowrap}
.uid-badge{background:var(--surface2);color:var(--text2);padding:4px 10px;border-radius:20px;font-size:11px;font-family:monospace;font-weight:600;white-space:nowrap}
.user-menu{display:flex;align-items:center;gap:6px;cursor:pointer;padding:4px 8px;border-radius:var(--radius-sm);transition:background var(--transition)}
.user-menu:hover{background:var(--surface)}
.user-avatar{width:28px;height:28px;border-radius:50%;background:var(--accent-dim);color:var(--accent2);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600}
.user-name{font-size:13px;color:var(--text2);max-width:80px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ═══ Main Content ═══ */
.user-main{padding-top:var(--topbar-h);min-height:100vh}
.page{display:none;padding:20px 24px 24px;max-width:1200px;margin:0 auto;animation:pageIn .3s ease}
.page.active{display:block}
.page-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;flex-wrap:wrap;gap:10px}
.page-header h1{font-size:22px;font-weight:700;letter-spacing:-.4px}
.page-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap}

/* ═══ Stat Cards ═══ */
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin-bottom:20px}
.stat-card{background:var(--surface);border-radius:var(--radius);padding:18px 20px;border:1px solid var(--border);transition:all var(--transition-slow);position:relative;overflow:hidden}
.stat-card::after{content:'';position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,var(--accent),var(--accent2));opacity:0;transition:opacity var(--transition-slow)}
.stat-card:hover{border-color:var(--border2);transform:translateY(-2px);box-shadow:0 4px 12px rgba(0,0,0,.3)}
.stat-card:hover::after{opacity:1}
.stat-card .label{font-size:12px;color:var(--text3);font-weight:500;text-transform:uppercase;letter-spacing:.4px;margin-bottom:6px}
.stat-card .value{font-size:24px;font-weight:700;letter-spacing:-.5px;line-height:1.1}
.stat-card .sub{font-size:12px;color:var(--text3);margin-top:4px}
.stat-card .icon{position:absolute;top:14px;right:14px;font-size:20px;opacity:.3}

/* ═══ User Info Card ═══ */
.user-info-card{background:var(--surface);border-radius:var(--radius);padding:18px 20px;border:1px solid var(--border);display:flex;align-items:center;gap:16px;margin-bottom:20px}
.user-info-card .avatar-lg{width:48px;height:48px;border-radius:12px;background:var(--accent-dim);color:var(--accent2);display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:700;flex-shrink:0}
.user-info-card .info{flex:1;min-width:0}
.user-info-card .info .name{font-size:16px;font-weight:600;margin-bottom:2px}
.user-info-card .info .meta{font-size:12px;color:var(--text3);display:flex;gap:12px;flex-wrap:wrap}
.user-info-card .info .meta span{display:flex;align-items:center;gap:4px}

/* ═══ Charts ═══ */
.charts-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:20px}
.chart-card{background:var(--surface);border-radius:var(--radius);border:1px solid var(--border);overflow:hidden;transition:border-color var(--transition)}
.chart-card:hover{border-color:var(--border2)}
.chart-title{font-size:13px;font-weight:600;color:var(--text2);padding:12px 16px 0}
.chart-body{position:relative;height:240px;padding:8px 12px 12px}

/* ═══ Tables ═══ */
.table-card{background:var(--surface);border-radius:var(--radius);border:1px solid var(--border);overflow:hidden;margin-bottom:16px}
.table-title{font-size:13px;font-weight:600;color:var(--text2);padding:12px 16px;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center}
.table-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:13px}
th{text-align:left;padding:8px 12px;color:var(--text3);font-weight:500;border-bottom:1px solid var(--border);font-size:12px;letter-spacing:.3px;white-space:nowrap}
td{padding:7px 12px;border-bottom:1px solid var(--border)}
tr:last-child td{border-bottom:none}
tr:hover td{background:var(--surface2)}
.mono{font-family:monospace}

/* ═══ Tags ═══ */
.tag{display:inline-block;padding:1px 6px;border-radius:4px;font-size:11px;font-weight:500;background:var(--surface2);color:var(--text2)}
.tag-green{background:var(--green-dim);color:var(--green)}
.tag-red{background:var(--red-dim);color:var(--red)}
.tag-yellow{background:var(--yellow-dim);color:var(--yellow)}
.tag-blue{background:var(--cyan-dim);color:var(--cyan)}
.tag-purple{background:var(--accent-dim);color:var(--accent2)}

/* ═══ Key display ═══ */
.key-cell{font-family:monospace;font-size:12px;display:flex;align-items:center;gap:6px}
.key-cell .key-text{color:var(--text2)}
.key-cell .copy-btn{background:var(--surface2);border:1px solid var(--border2);color:var(--text3);padding:2px 6px;border-radius:4px;font-size:11px;cursor:pointer;transition:all .15s}
.key-cell .copy-btn:hover{color:var(--accent2);border-color:var(--accent)}
.key-cell .toggle-btn{background:none;border:none;color:var(--text3);cursor:pointer;font-size:12px;padding:2px}

/* ═══ Modal ═══ */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.7);display:none;align-items:center;justify-content:center;z-index:150;backdrop-filter:blur(4px);opacity:0;transition:opacity .25s ease}
.modal-overlay.show{display:flex;opacity:1}
.modal{background:var(--surface);border:1px solid var(--border2);border-radius:16px;padding:28px;width:480px;max-height:80vh;overflow-y:auto;box-shadow:var(--shadow-lg);animation:modalIn .3s cubic-bezier(.16,1,.3,1)}
.modal h3{margin-bottom:20px;font-size:18px;font-weight:700}
.modal-actions{display:flex;gap:8px;margin-top:20px;justify-content:flex-end}
.modal .btn{width:auto}

/* ═══ Coupon Box ═══ */
.coupon-box{display:flex;gap:8px;align-items:flex-end}
.coupon-box input{flex:1}
.coupon-info{margin-top:8px;padding:10px 12px;border-radius:var(--radius-sm);font-size:12px;display:none}
.coupon-info.show{display:block}
.coupon-info.valid{background:var(--green-dim);border:1px solid rgba(52,211,153,.2);color:var(--green)}
.coupon-info.invalid{background:var(--red-dim);border:1px solid rgba(248,113,113,.2);color:var(--red)}
.coupon-discount-row{display:flex;justify-content:space-between;align-items:center;margin-top:4px}
.coupon-discount-row .orig{color:var(--text3);text-decoration:line-through;font-size:11px}
.coupon-discount-row .final{color:var(--green);font-weight:600;font-size:15px}

/* ═══ Toast ═══ */
.toast-container{position:fixed;top:16px;right:16px;z-index:300;display:flex;flex-direction:column;gap:8px;pointer-events:none}
.toast{background:var(--surface);border:1px solid var(--border2);border-radius:var(--radius);padding:12px 16px;min-width:260px;box-shadow:var(--shadow-lg);animation:toastIn .4s cubic-bezier(.16,1,.3,1);pointer-events:auto;transition:all .3s ease}
.toast.removing{opacity:0;transform:translateX(100px)}
.toast.t-green{border-left:3px solid var(--green)}.toast.t-red{border-left:3px solid var(--red)}
.toast .t-title{font-size:13px;font-weight:600}.toast .t-msg{font-size:12px;color:var(--text2)}

/* ═══ Filters ═══ */
.filter-select,.filter-input{padding:6px 10px;font-size:12px;border-radius:6px;border:1px solid var(--border2);background:var(--bg2);color:var(--G);font-family:inherit}
.filter-select:focus,.filter-input:focus{outline:none;border-color:var(--accent)}

/* ═══ Empty State ═══ */
.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:60px 20px;color:var(--text3);text-align:center}
.empty-state .icon{font-size:48px;margin-bottom:12px;opacity:.5}
.empty-state .title{font-size:15px;font-weight:600;color:var(--text2);margin-bottom:4px}
.empty-state .desc{font-size:13px}

/* ═══ Loading ═══ */
.loading-spinner{display:inline-block;width:16px;height:16px;border:2px solid var(--border2);border-top-color:var(--accent);border-radius:50%;animation:spin .6s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ═══ Chat ═══ */
.chat-layout{display:flex;flex:1;overflow:hidden;height:calc(100vh - var(--topbar-h))}
.chat-sidebar{width:260px;min-width:260px;background:var(--bg2);border-right:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden}
.chat-sidebar-header{padding:12px 14px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}
.chat-sidebar-header .title{font-size:13px;font-weight:600;color:var(--text2)}
.new-chat-btn{padding:5px 10px;border-radius:var(--radius-sm);border:1px solid var(--border2);background:var(--surface);color:var(--G);font-size:12px;cursor:pointer;transition:all .15s;white-space:nowrap}
.new-chat-btn:hover{background:var(--accent-dim);border-color:var(--accent);color:var(--accent2)}
.conv-list{flex:1;overflow-y:auto;padding:6px}
.conv-item{display:flex;align-items:center;padding:9px 10px;border-radius:var(--radius-sm);cursor:pointer;transition:background .15s;gap:8px;margin-bottom:2px}
.conv-item:hover{background:var(--surface2)}
.conv-item.active{background:var(--accent-dim);border:1px solid rgba(124,108,240,.2)}
.conv-item .conv-title{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:12px}
.conv-item .conv-delete{opacity:0;padding:2px 4px;border:none;background:transparent;color:var(--text3);cursor:pointer;font-size:12px;flex-shrink:0}
.conv-item:hover .conv-delete{opacity:1}
.conv-item .conv-delete:hover{color:var(--red)}
.conv-empty{padding:20px 14px;text-align:center;color:var(--text3);font-size:12px}

.chat-main{flex:1;display:flex;flex-direction:column;overflow:hidden}
.chat-header{display:flex;align-items:center;justify-content:space-between;padding:10px 16px;border-bottom:1px solid var(--border);background:var(--bg2);gap:10px;flex-wrap:wrap}
.chat-header-left{display:flex;align-items:center;gap:10px;min-width:0}
.chat-header-title{font-weight:600;font-size:14px;max-width:300px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.chat-header-right{display:flex;align-items:center;gap:8px;flex-shrink:0}
.chat-header-right select{padding:5px 8px;border-radius:var(--radius-sm);border:1px solid var(--border2);background:var(--surface);color:var(--G);font-size:12px}

/* Reasoning toggle */
.reasoning-toggle{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--text2)}
.reasoning-toggle label{cursor:pointer;display:flex;align-items:center;gap:4px}
.reasoning-toggle select{padding:3px 6px;border-radius:4px;border:1px solid var(--border2);background:var(--surface);color:var(--G);font-size:11px}
.switch{position:relative;display:inline-block;width:32px;height:18px}
.switch input{opacity:0;width:0;height:0}
.slider{position:absolute;cursor:pointer;inset:0;background:var(--surface3);transition:.3s;border-radius:9px}
.slider:before{position:absolute;content:"";height:14px;width:14px;left:2px;bottom:2px;background:var(--G);transition:.3s;border-radius:50%}
input:checked+.slider{background:var(--accent)}
input:checked+.slider:before{transform:translateX(14px)}

.chat-container{flex:1;overflow-y:auto;padding:20px;max-width:1100px;width:100%;margin:0 auto}
.msg{margin-bottom:20px;display:flex;gap:10px}
.msg.user{flex-direction:row-reverse}
.msg-avatar{width:32px;height:32px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:14px;flex-shrink:0}
.msg.user .msg-avatar{background:var(--accent-dim);color:var(--accent2)}
.msg.assistant .msg-avatar{background:var(--green-dim);color:var(--green)}
.msg-content{max-width:80%;min-width:0}
.msg-bubble{padding:10px 14px;border-radius:12px;line-height:1.6;font-size:14px;word-break:break-word;overflow-wrap:anywhere}
.msg.user .msg-bubble{background:var(--accent);color:#fff;border-bottom-right-radius:4px;white-space:pre-wrap}
.msg.assistant .msg-bubble{background:var(--surface2);border-bottom-left-radius:4px}
.streaming::after{content:'▊';animation:blink 1s step-end infinite;color:var(--accent2)}
@keyframes blink{50%{opacity:0}}

/* Message meta (timestamp + model capsule + duration) */
.msg-meta{display:flex;align-items:center;gap:8px;margin-top:4px;font-size:11px;color:var(--text3);flex-wrap:wrap}
.msg-meta .ts{color:var(--text3)}
.msg.user .msg-meta{justify-content:flex-end}
.msg.assistant .msg-meta{justify-content:flex-start}
.model-capsule{display:inline-flex;align-items:center;gap:3px;background:var(--accent-dim);color:var(--accent2);padding:1px 8px;border-radius:10px;font-size:10px;font-weight:500;font-family:monospace}
.duration-badge{display:inline-flex;align-items:center;gap:3px;font-size:10px;color:var(--text3)}
.duration-badge .bulb{font-size:11px}

/* Streaming dots animation */
.stream-dots{display:inline-flex;gap:3px;align-items:center;margin-bottom:4px}
.stream-dots .dot{width:5px;height:5px;border-radius:50%;background:var(--accent2);animation:streamBounce 1.4s ease-in-out infinite}
.stream-dots .dot:nth-child(2){animation-delay:.2s}
.stream-dots .dot:nth-child(3){animation-delay:.4s}
@keyframes streamBounce{0%,80%,100%{opacity:.3;transform:scale(.8)}40%{opacity:1;transform:scale(1.2)}}

.msg-bubble.markdown p{margin:4px 0}.msg-bubble.markdown p:first-child{margin-top:0}
.msg-bubble.markdown pre{background:var(--bg);border:1px solid var(--border);border-radius:6px;padding:12px;margin:8px 0;overflow-x:auto;font-size:13px;position:relative}
.msg-bubble.markdown code{font-family:monospace;font-size:13px}
.msg-bubble.markdown :not(pre)>code{background:var(--surface3);padding:2px 5px;border-radius:3px;font-size:12px}
.msg-bubble.markdown ul,.msg-bubble.markdown ol{padding-left:20px;margin:6px 0}
.msg-bubble.markdown table{border-collapse:collapse;width:100%;margin:8px 0}
.msg-bubble.markdown th,.msg-bubble.markdown td{border:1px solid var(--border);padding:6px 10px;text-align:left}
.msg-bubble.markdown th{background:var(--surface3)}
.msg-bubble.markdown blockquote{border-left:3px solid var(--accent);padding-left:12px;margin:8px 0;color:var(--text2)}
.msg-bubble.markdown a{color:var(--accent2)}

.input-area{padding:14px 20px;border-top:1px solid var(--border);background:var(--bg2)}
.input-wrap{max-width:820px;margin:0 auto;display:flex;gap:10px;align-items:flex-end}
.input-wrap textarea{flex:1;padding:10px 14px;border-radius:var(--radius);border:1px solid var(--border2);background:var(--surface);color:var(--G);font-size:14px;font-family:inherit;resize:none;min-height:44px;max-height:200px;line-height:1.5;transition:border-color .15s}
.input-wrap textarea:focus{outline:none;border-color:var(--accent)}
.send-btn{padding:10px 20px;border-radius:var(--radius);border:none;background:var(--accent);color:#fff;font-size:14px;font-weight:600;cursor:pointer;transition:all .15s;white-space:nowrap}
.send-btn:hover{background:var(--accent2)}
.send-btn:disabled{opacity:.5;cursor:not-allowed}

/* ═══ Pagination ═══ */
.pagination{display:flex;align-items:center;justify-content:center;gap:6px;padding:12px 16px;border-top:1px solid var(--border)}
.pagination .pg-btn{padding:5px 10px;border-radius:5px;border:1px solid var(--border2);background:var(--surface2);color:var(--text2);font-size:12px;cursor:pointer;transition:all var(--transition)}
.pagination .pg-btn:hover{color:var(--G);border-color:var(--border3)}
.pagination .pg-btn.active{background:var(--accent);border-color:var(--accent);color:#fff}
.pagination .pg-btn:disabled{opacity:.4;cursor:default}
.pagination .pg-info{font-size:12px;color:var(--text3);padding:0 8px}

/* ═══ Animations ═══ */
@keyframes cardIn{from{opacity:0;transform:translateY(20px) scale(.97)}to{opacity:1;transform:translateY(0) scale(1)}}
@keyframes pageIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
@keyframes modalIn{from{opacity:0;transform:scale(.95) translateY(10px)}to{opacity:1;transform:scale(1) translateY(0)}}
@keyframes toastIn{from{transform:translateX(100px);opacity:0}to{transform:translateX(0);opacity:1}}

/* ═══ Responsive ═══ */
@media(max-width:768px){
  .topbar-nav a .nav-label{display:none}
  .charts-row{grid-template-columns:1fr}
  .chat-sidebar{display:none}
  .modal{width:95vw;padding:20px}
  .page{padding:16px}
  .stat-grid{grid-template-columns:1fr 1fr;gap:10px}
}

/* ── 思考过程折叠区块 ── */
.reasoning-block {
  margin-bottom: 8px;
  border: 1px solid var(--border, #333);
  border-radius: 8px;
  background: var(--surface2, #1a1a2e);
  overflow: hidden;
}
.reasoning-block summary {
  padding: 8px 14px;
  cursor: pointer;
  font-size: 13px;
  color: var(--text3, #888);
  user-select: none;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 6px;
}
.reasoning-block summary::-webkit-details-marker { display: none; }
.reasoning-block summary::before { content: '▸'; transition: transform 0.2s; }
.reasoning-block[open] summary::before { transform: rotate(90deg); }
.reasoning-block .reasoning-content {
  padding: 8px 14px 12px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text2, #aaa);
  max-height: 400px;
  overflow-y: auto;
  border-top: 1px solid var(--border, #333);
}
.reasoning-block .reasoning-content pre { font-size: 12px; white-space: pre-wrap; }
.reasoning-block .reasoning-content p { margin: 4px 0; }

/* ── 代码块复制按钮 ── */
.code-copy-btn {
  position: absolute;
  top: 6px;
  right: 6px;
  padding: 3px 8px;
  border-radius: 4px;
  border: 1px solid var(--border2, #333);
  background: var(--surface2, #1a1a2e);
  color: var(--text3, #888);
  font-size: 11px;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.2s, color 0.15s;
  z-index: 1;
}
.msg-bubble.markdown pre:hover .code-copy-btn { opacity: 1; }
.code-copy-btn:hover { color: var(--accent2); border-color: var(--accent); }
.code-copy-btn.copied { color: var(--green); border-color: var(--green); }

/* ═══ Protocol Checkbox ═══ */
.protocol-checkbox{margin-bottom:12px;padding:10px;background:rgba(124,108,240,.05);border:1px solid rgba(124,108,240,.15);border-radius:var(--radius-sm);font-size:12px;color:var(--text2)}
.protocol-checkbox label{display:flex;align-items:flex-start;gap:8px;cursor:pointer;line-height:1.5}
.protocol-checkbox input{margin-top:2px;accent-color:var(--accent)}

/* ═══ Profile Page ═══ */
.profile-header{display:flex;align-items:center;gap:16px;background:var(--surface);border-radius:var(--radius);padding:20px;border:1px solid var(--border);margin-bottom:20px}
.profile-header .avatar-lg{width:64px;height:64px;border-radius:16px;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;display:flex;align-items:center;justify-content:center;font-size:28px;font-weight:700;flex-shrink:0}
.profile-header .info{flex:1;min-width:0}
.profile-header .info .name{font-size:18px;font-weight:700;margin-bottom:4px}
.profile-header .info .meta{font-size:12px;color:var(--text3);display:flex;gap:16px;flex-wrap:wrap}
.profile-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:20px}
.profile-card{background:var(--surface);border-radius:var(--radius);border:1px solid var(--border);padding:18px;transition:border-color var(--transition)}
.profile-card:hover{border-color:var(--border2)}
.profile-card-title{font-size:13px;font-weight:600;color:var(--text2);margin-bottom:10px}
.profile-card-body{font-size:14px;margin-bottom:10px}
.profile-card-body .verified{color:var(--green);font-size:12px;margin-left:6px}
.profile-card-body .unbound{color:var(--text3)}
.profile-card-actions{display:flex;gap:8px}
.profile-section{background:var(--surface);border-radius:var(--radius);border:1px solid var(--border);padding:18px;margin-bottom:16px}
.profile-section.danger-zone{border-color:rgba(248,113,113,.2)}
.profile-section-title{font-size:14px;font-weight:600;margin-bottom:12px}
.profile-section.danger-zone .profile-section-title{color:var(--red)}

@media(max-width:768px){
  .profile-grid{grid-template-columns:1fr}
}