/* ================= 基础 ================= */
:root{
  --blue:#3b6cf6;
  --blue-soft:#eef3ff;
  --ink:#1d2433;
  --ink-2:#3a4258;
  --ink-3:#6b7488;
  --ink-4:#9aa3b5;
  --line:#e9eef8;
  --bg:#fdfdff;
  --sidebar:#f6f8fd;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased;
}
.ico{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex:none}
button{font-family:inherit}

/* ================= 布局 ================= */
.app{display:flex;height:100vh;overflow:hidden}

/* ================= 侧栏 ================= */
.sidebar{
  width:264px;flex:none;background:var(--sidebar);border-right:1px solid var(--line);
  display:flex;flex-direction:column;padding:18px 14px 14px;gap:12px;
}
.brand{display:flex;align-items:center;gap:10px;padding:2px 4px 6px}
.logo{
  width:38px;height:38px;border-radius:11px;flex:none;
  background:linear-gradient(135deg,#5b8cff,#2f5ae6);
  display:grid;place-items:center;color:#fff;font-weight:800;font-size:19px;
  box-shadow:0 4px 12px rgba(59,108,246,.28);
}
.brand-text h1{margin:0;font-size:17px;font-weight:700;letter-spacing:-.2px}
.brand-text p{margin:2px 0 0;font-size:11px;color:var(--ink-4)}
.brand-text{flex:1;min-width:0}
.collapse-btn{width:26px;height:26px;border:0;background:transparent;color:#a6aec0;border-radius:6px;cursor:pointer;display:grid;place-items:center}
.collapse-btn:hover{background:#eaf0fb;color:#5a6478}
.collapse-btn .ico{width:15px;height:15px}

.new-chat{
  height:44px;border-radius:10px;border:1px solid #e6ecf8;background:#fff;
  display:flex;align-items:center;justify-content:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--ink-2);cursor:pointer;
  box-shadow:0 1px 2px rgba(20,40,90,.04);transition:.16s;
}
.new-chat:hover{border-color:#d5e0f5;box-shadow:0 3px 10px rgba(40,80,160,.08)}
.new-chat .ico{width:15px;height:15px;stroke-width:2}

.search{
  height:40px;border-radius:10px;background:#eef3fb;display:flex;align-items:center;
  gap:8px;padding:0 12px;color:var(--ink-4);cursor:text;
}
.search .ico{width:15px;height:15px}
.search input{flex:1;border:0;background:transparent;outline:none;font-size:13px;color:var(--ink-2);font-family:inherit}
.search input::placeholder{color:#96a0b5}

.history{flex:1;overflow-y:auto;margin:2px -4px 0;padding:0 4px}
.history::-webkit-scrollbar{width:6px}
.history::-webkit-scrollbar-thumb{background:#dfe6f3;border-radius:3px}
.group-title{font-size:11px;color:#96a0b5;margin:10px 8px 6px;letter-spacing:.3px}
.conv{
  display:flex;align-items:center;gap:8px;padding:9px 10px;border-radius:10px;
  font-size:13px;color:var(--ink-2);cursor:pointer;transition:.15s;position:relative;
}
.conv:hover{background:#eaf0fb}
.conv.active{background:#fff;box-shadow:0 1px 3px rgba(30,60,120,.08)}
.conv .cicon{width:14px;height:14px;color:#a6aec0;flex:none}
.conv .name{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.conv .del{
  width:20px;height:20px;border:0;background:transparent;color:#a6aec0;cursor:pointer;
  border-radius:5px;display:grid;place-items:center;opacity:0;transition:.15s;
}
.conv:hover .del{opacity:1}
.conv .del:hover{background:#e2e9f7;color:#5a6478}
.conv .del .ico{width:13px;height:13px}

.empty-state{border:1px dashed #d9e3f5;border-radius:14px;background:#fbfdff;padding:24px 16px;text-align:center}
.empty-icon{width:46px;height:46px;border-radius:50%;background:#e9f0ff;color:#3b6cf6;display:grid;place-items:center;margin:0 auto 12px}
.empty-icon .ico{width:22px;height:22px}
.empty-title{margin:0 0 6px;font-size:12.5px;font-weight:600;color:var(--ink-2)}
.empty-desc{margin:0;font-size:11.5px;line-height:1.65;color:var(--ink-4)}

.user-card{
  margin-top:auto;display:flex;align-items:center;gap:10px;padding:9px 10px;
  background:#fff;border:1px solid var(--line);border-radius:12px;
}
.user-avatar{
  width:32px;height:32px;border-radius:50%;flex:none;display:grid;place-items:center;
  background:linear-gradient(135deg,#cfe0ff,#9dbcff);color:#2f5ae6;font-size:13px;font-weight:700;
}
.user-info{flex:1;min-width:0}
.user-name{margin:0;font-size:12.5px;font-weight:600;color:var(--ink-2)}
.user-sub{margin:1px 0 0;font-size:11px;color:var(--ink-4)}
.chev{width:14px;height:14px;color:#a6aec0}

/* ================= 主区 ================= */
.main{
  flex:1;display:flex;flex-direction:column;min-width:0;position:relative;
  background:radial-gradient(900px 420px at 50% -80px,#eaf2ff 0%,rgba(234,242,255,0) 72%),var(--bg);
}
.topbar{height:56px;flex:none;display:flex;align-items:center;gap:12px;padding:0 22px;border-bottom:1px solid #eef2f9}
.topbar-title{font-size:14px;font-weight:500;color:var(--ink-2);max-width:440px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.agent-pill{display:inline-flex;align-items:center;gap:5px;font-size:11.5px;color:#1f9d55;background:#e9f8ef;border-radius:999px;padding:4px 10px}
.agent-pill i{width:5px;height:5px;border-radius:50%;background:#23b15e;display:block}
.topbar-actions{margin-left:auto;display:flex;gap:6px}
.tb-btn{width:34px;height:34px;border:0;border-radius:8px;background:transparent;color:#5a6478;cursor:pointer;display:grid;place-items:center;transition:.15s}
.tb-btn:hover{background:#f1f5fc;color:var(--ink-2)}
.tb-btn .ico{width:17px;height:17px}

.scroll-area{flex:1;overflow-y:auto;min-height:0;display:flex;flex-direction:column}
.scroll-area::-webkit-scrollbar{width:8px}
.scroll-area::-webkit-scrollbar-thumb{background:#e2e8f4;border-radius:4px}

/* ================= Hero ================= */
.hero{max-width:880px;margin:auto;text-align:center;padding:10px 24px 4px;width:100%}
.hero-visual{position:relative;height:300px;display:flex;align-items:center;justify-content:center}
.glow{position:absolute;width:560px;height:330px;border-radius:50%;
  background:radial-gradient(closest-side,#dce9ff 0%,rgba(220,233,255,.55) 45%,rgba(220,233,255,0) 100%);filter:blur(6px)}
.ring{position:absolute;width:430px;height:210px;border-radius:50%;border:1px solid #e6eefc}
.robot{width:252px;height:242px;position:relative;z-index:1;filter:drop-shadow(0 18px 30px rgba(80,120,200,.18))}

.float-pill{
  position:absolute;z-index:2;display:flex;align-items:center;gap:8px;
  background:#fff;border:1px solid #e8eef9;border-radius:999px;
  padding:7px 13px 7px 7px;cursor:pointer;
  box-shadow:0 8px 22px rgba(50,90,170,.09);transition:.18s;text-align:left;
}
.float-pill:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(50,90,170,.14)}
.float-pill.dim{opacity:.5;filter:saturate(.5)}
.float-pill.active{
  background:linear-gradient(135deg,#6b96ff,#3b6cf6);border-color:transparent;
  box-shadow:0 12px 28px rgba(59,108,246,.32);transform:translateY(-1px);
}
.float-pill.active .fp-text b,.float-pill.active .fp-text i{color:#fff}
.float-pill.active .fp-icon{background:rgba(255,255,255,.22);color:#fff}
.fp-icon{width:28px;height:28px;border-radius:50%;display:grid;place-items:center;flex:none}
.fp-icon .ico{width:14px;height:14px}
.fp-icon.blue{background:#e6efff;color:#3b6cf6}
.fp-icon.violet{background:#efeafd;color:#7a5af8}
.fp-icon.cyan{background:#e2f7fb;color:#0e9db8}
.fp-icon.green{background:#e5f7ec;color:#1f9d55}
.fp-text{display:flex;flex-direction:column;line-height:1.25}
.fp-text b{font-size:11.5px;font-weight:600;color:var(--ink-2)}
.fp-text i{font-style:normal;font-size:10px;color:var(--ink-4)}

.float-pill[data-agent="multimodal"]{right:5%;bottom:14%}
.float-pill[data-agent="evidence"]{left:8%;bottom:6%}
.float-pill[data-agent="disease"]{left:2%;top:44%}
.float-pill[data-agent="product"]{right:0;top:37%}

.hello{margin:6px 0 14px;font-size:54px;font-weight:600;letter-spacing:4px;color:#1d2433;
  font-family:"Songti SC","STSong","Source Han Serif SC","Noto Serif SC",serif}
.hello-sub{margin:0 0 10px;font-size:15px;color:#4b5568}
.hello-tip{margin:0;font-size:12.5px;color:#8b93a7;display:flex;align-items:center;justify-content:center;gap:5px}
.spark{width:13px;height:13px;color:#6fa0ff;fill:currentColor;stroke:none}

/* 智能体提示条（二级页） */
.agent-notice{
  display:inline-flex;align-items:center;gap:10px;margin:0 auto 8px;
  background:#fff;border:1px solid #e6ecf8;border-radius:999px;padding:6px 8px 6px 14px;
  font-size:12.5px;color:#4b5568;box-shadow:0 4px 14px rgba(50,90,170,.07);
}
.agent-notice[hidden]{display:none}
.agent-notice button{border:0;background:#f1f5fc;border-radius:999px;padding:5px 10px;font-size:12px;color:#3b6cf6;cursor:pointer}
.agent-notice button:hover{background:#e6eefc}

/* ================= 消息区 ================= */
.messages{max-width:900px;width:100%;margin:0 auto;padding:18px 24px 6px;display:none;flex-direction:column;gap:22px}
.messages.show{display:flex}

.date-divider{display:flex;align-items:center;gap:12px;color:#a6aec0;font-size:11.5px;margin:2px 0 0}
.date-divider::before,.date-divider::after{content:"";flex:1;height:1px;background:#eef1f8}

.msg{display:flex;gap:10px;align-items:flex-start}
.msg.user{justify-content:flex-end}
.msg .avatar{width:32px;height:32px;border-radius:50%;flex:none;display:grid;place-items:center;font-size:12px;font-weight:700;color:#fff}
.msg.user .avatar{background:linear-gradient(135deg,#8fb3ff,#3b6cf6);order:3}
.msg.user .avatar svg{width:18px;height:18px}
.msg.ai .avatar{background:linear-gradient(135deg,#5b8cff,#2f5ae6)}

.msg-body{min-width:0;max-width:78%}
.msg.user .msg-body{display:flex;flex-direction:column;align-items:flex-end;order:2}
.msg-meta{display:flex;align-items:center;gap:8px;font-size:11.5px;color:var(--ink-4);margin-bottom:6px}
.msg.user .msg-meta{justify-content:flex-end}
.msg-meta .who{color:var(--ink-3);font-weight:500}
.agent-tag{color:#3b6cf6;background:#eef3ff;border-radius:4px;padding:1px 5px;font-size:11px}

.bubble{background:var(--blue);color:#fff;padding:12px 16px;border-radius:14px 14px 4px 14px;
  font-size:14.5px;line-height:1.75;word-break:break-word;white-space:pre-wrap}
.card{background:#fff;border:1px solid #edf1f8;border-radius:14px;padding:18px 22px;
  font-size:15px;line-height:1.9;color:#2a3242;box-shadow:0 2px 12px rgba(30,60,120,.045)}
.card h3,.card h4{margin:16px 0 8px;font-size:15.5px;font-weight:700;color:#1d2433;line-height:1.6}
.card h3:first-child,.card h4:first-child{margin-top:0}
.card p{margin:0 0 8px}
.card p:last-child{margin-bottom:0}
.card ul,.card ol{margin:6px 0 10px;padding-left:22px}
.card li{margin:3px 0}
.card strong{color:#121826;font-weight:700}
.card code{background:#f2f5fb;border-radius:4px;padding:1px 5px;font-size:13px}

.msg-actions{display:flex;gap:2px;margin-top:6px;opacity:.8;transition:.15s}
.msg:hover .msg-actions{opacity:1}
.msg.user .msg-actions{justify-content:flex-end}
.act{width:28px;height:28px;border:0;background:transparent;border-radius:7px;color:#9aa3b5;cursor:pointer;display:grid;place-items:center;transition:background .15s,color .15s}
.act .ico{width:15px;height:15px;stroke-width:2}
.act:hover{background:#f1f5fc;color:#4a5266}
.act.on{color:#3b6cf6}

.msg-foot{display:flex;align-items:center;gap:8px;margin-top:8px;font-size:11.5px;color:#a0a8ba}
.msg-foot .act{width:28px;height:28px}

.caret::after{content:"▍";margin-left:2px;color:#9db4e8;animation:blink 1s steps(2,start) infinite}
@keyframes blink{to{visibility:hidden}}

/* ================= 输入区 ================= */
.composer-wrap{padding:10px 24px 14px;background:linear-gradient(to top,#fdfdff 55%,rgba(253,253,255,0))}
.composer{
  max-width:880px;margin:0 auto;display:flex;flex-direction:column;
  background:#fff;border:1px solid #e6ecf8;border-radius:18px;padding:10px 12px 10px 14px;
  box-shadow:0 10px 34px rgba(50,90,180,.09);transition:.2s;
}
.composer:focus-within{border-color:#cfdcf7;box-shadow:0 12px 38px rgba(50,90,180,.13)}
.agent-chip{display:inline-flex;align-items:center;gap:7px;align-self:flex-start;
  background:#eef3ff;color:#3b6cf6;border-radius:999px;padding:5px 9px 5px 10px;font-size:12.5px;margin-bottom:8px}
.agent-chip[hidden]{display:none}
.ac-icon{width:14px;height:14px;border-radius:50%;background:linear-gradient(135deg,#6b96ff,#3b6cf6);flex:none}
.agent-chip button{border:0;background:transparent;color:#9db4e8;cursor:pointer;font-size:15px;line-height:1;padding:0 2px}
.composer-row{display:flex;align-items:flex-end;gap:10px}

.plus{width:36px;height:36px;flex:none;border:1px solid #e9eef8;border-radius:10px;background:#fff;color:#5a6478;cursor:pointer;display:grid;place-items:center;transition:.15s}
.plus:hover{background:#f6f9ff;border-color:#d9e3f5}
.plus .ico{width:17px;height:17px}

#input{flex:1;border:0;outline:none;resize:none;background:transparent;font-family:inherit;
  font-size:14.5px;line-height:1.6;color:var(--ink-2);min-height:44px;max-height:160px;padding:10px 2px}
#input::placeholder{color:#a2aabc}

.composer-right{display:flex;align-items:center;gap:4px;padding-bottom:3px}
.mic{width:32px;height:32px;border:0;background:transparent;color:#8b93a7;cursor:pointer;display:grid;place-items:center;border-radius:8px}
.mic:hover{background:#f1f5fc;color:#5a6478}
.mic .ico{width:17px;height:17px}

.voice-pill{border:0;background:#f1f4fb;border-radius:999px;padding:6px 12px;font-size:12px;color:#4a5266;display:flex;align-items:center;gap:5px;cursor:pointer}
.voice-pill:hover{background:#e9eef9}
.voice-pill .ico{width:13px;height:13px}
.voice-select{border:0;background:transparent;font-size:12px;color:#4a5266;cursor:pointer;display:flex;align-items:center;gap:3px;padding:6px 4px}
.voice-select .ico{width:12px;height:12px;color:#9aa3b5}

.send{width:40px;height:40px;flex:none;border:0;border-radius:50%;color:#fff;cursor:pointer;
  background:linear-gradient(135deg,#6b96ff,#3b6cf6);display:grid;place-items:center;
  box-shadow:0 6px 16px rgba(59,108,246,.28);transition:.18s}
.send:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 8px 20px rgba(59,108,246,.36)}
.send:disabled{background:#dfe6f5;box-shadow:none;cursor:not-allowed}
.send .ico{width:18px;height:18px;stroke:#fff;stroke-width:2}

.suggestions{max-width:880px;margin:12px auto 0;display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.chip{border:1px solid #e6ecf8;background:#fff;border-radius:999px;padding:8px 14px;font-size:12.5px;color:#3a4258;cursor:pointer;transition:.16s;display:flex;align-items:center;gap:6px}
.chip:hover{border-color:#cfdcf7;box-shadow:0 4px 12px rgba(50,90,170,.08);transform:translateY(-1px)}
.chip svg{width:13px;height:13px;color:#6fa0ff;fill:currentColor;stroke:none}
.footnote{text-align:center;font-size:11.5px;color:#9aa3b5;margin:12px 0 0}

/* 对话模式 */
body.chatting .hero{display:none}
body.chatting .suggestions{display:none}
body.chatting .composer-wrap{background:linear-gradient(to top,#fdfdff 70%,rgba(253,253,255,0))}

/* ================= 响应式 ================= */
@media (max-width:980px){
  .sidebar{position:fixed;left:0;top:0;bottom:0;z-index:20;transform:translateX(-100%);transition:.25s;box-shadow:0 0 40px rgba(30,60,120,.12)}
  .hero-visual{height:250px;transform:scale(.86)}
  .hello{font-size:42px}
  .composer-wrap{padding:8px 12px 12px}
  .msg-body{max-width:86%}
}

/* ================= 模型设置 ================= */
.topbar-actions{display:flex;align-items:center;gap:6px}
.model-chip{display:inline-flex;align-items:center;gap:6px;border:1px solid #e6ecf8;background:#fff;
  border-radius:999px;padding:5px 10px;font-size:12px;color:#4a5266;cursor:pointer;transition:.15s}
.model-chip:hover{border-color:#cfdcf7;box-shadow:0 3px 10px rgba(50,90,170,.08)}
.mc-dot{width:6px;height:6px;border-radius:50%;background:#23b15e;flex:none}
.mc-dot.off{background:#d0d5e0}
.model-chip .ico{width:12px;height:12px;color:#9aa3b5}

.modal-mask{position:fixed;inset:0;background:rgba(20,30,50,.35);backdrop-filter:blur(2px);
  display:flex;align-items:center;justify-content:center;z-index:100}
.modal-mask[hidden]{display:none}
.modal{width:min(560px,92vw);max-height:86vh;overflow:auto;background:#fff;border-radius:16px;
  box-shadow:0 24px 60px rgba(20,40,90,.22);animation:pop .16s ease-out}
@keyframes pop{from{transform:translateY(8px);opacity:.6}to{transform:none;opacity:1}}
.modal-head{display:flex;align-items:center;justify-content:space-between;padding:18px 22px;
  border-bottom:1px solid #eef1f8;position:sticky;top:0;background:#fff;z-index:1}
.modal-head h3{margin:0;font-size:16px}
.modal-close{border:0;background:transparent;font-size:20px;color:#9aa3b5;cursor:pointer;line-height:1}
.modal-body{padding:18px 22px 22px}
.modal-tip{margin:0 0 14px;font-size:12px;color:#8b93a7}
.modal-tip code{background:#f2f5fb;padding:1px 5px;border-radius:4px}

.model-list{display:flex;flex-direction:column;gap:8px;margin-bottom:20px}
.model-item{border:1px solid #e6ecf8;border-radius:12px;padding:12px 14px;display:flex;align-items:center;gap:12px;cursor:pointer;transition:.15s}
.model-item:hover{border-color:#d5e0f5}
.model-item.active{border-color:#3b6cf6;background:#f7faff;box-shadow:0 2px 10px rgba(59,108,246,.08)}
.mi-radio{width:16px;height:16px;border-radius:50%;border:2px solid #d5dceb;flex:none}
.model-item.active .mi-radio{border-color:#3b6cf6;background:radial-gradient(circle,#3b6cf6 0 44%,#fff 48% 100%)}
.mi-main{flex:1;min-width:0}
.mi-name{font-size:13.5px;font-weight:600;color:#2a3242;display:flex;align-items:center;gap:6px}
.mi-badge{font-size:10.5px;color:#1f9d55;background:#e9f8ef;border-radius:999px;padding:1px 6px}
.mi-warn{font-size:10.5px;color:#b47a12;background:#fdf4e3;border-radius:999px;padding:1px 6px}
.mi-sub{font-size:11.5px;color:#8b93a7;margin-top:3px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.mi-actions{display:flex;gap:4px}
.mi-btn{border:0;background:transparent;color:#a6aec0;cursor:pointer;border-radius:6px;width:26px;height:26px;display:grid;place-items:center}
.mi-btn:hover{background:#f1f5fc;color:#5a6478}
.mi-btn .ico{width:14px;height:14px}

.model-form{border-top:1px solid #eef1f8;padding-top:16px}
.model-form h4{margin:0 0 12px;font-size:13.5px;color:#2a3242}
.model-form label{display:block;font-size:12px;color:#6b7488;margin-bottom:10px}
.model-form input{display:block;width:100%;margin-top:6px;padding:10px 12px;border:1px solid #e6ecf8;
  border-radius:9px;font-size:13px;outline:none;font-family:inherit;background:#fbfcff}
.model-form input:focus{border-color:#cfdcf7;background:#fff}
.form-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:6px}
.btn-primary{border:0;background:linear-gradient(135deg,#6b96ff,#3b6cf6);color:#fff;border-radius:9px;padding:9px 18px;font-size:13px;cursor:pointer}
.btn-primary:hover{box-shadow:0 6px 16px rgba(59,108,246,.28)}
.btn-ghost{border:1px solid #e6ecf8;background:#fff;color:#5a6478;border-radius:9px;padding:9px 16px;font-size:13px;cursor:pointer}

.toast{position:fixed;left:50%;bottom:32px;transform:translateX(-50%);background:#1f2433;color:#fff;
  font-size:13px;padding:10px 18px;border-radius:999px;z-index:200;opacity:0;transition:.2s;pointer-events:none}
.toast.show{opacity:1;bottom:40px}

.mi-models{margin-top:6px}
.mi-select{border:1px solid #e6ecf8;background:#fff;border-radius:8px;padding:5px 8px;
  font-size:12px;color:#3a4258;outline:none;font-family:inherit;cursor:pointer;max-width:100%}
.mi-select:hover{border-color:#cfdcf7}

.model-form select{display:block;width:100%;margin-top:6px;padding:10px 12px;border:1px solid #e6ecf8;
  border-radius:9px;font-size:13px;outline:none;font-family:inherit;background:#fbfcff;color:#3a4258;cursor:pointer}
.model-form select:focus{border-color:#cfdcf7;background:#fff}
.mi-proto{font-size:10.5px;color:#5a6478;background:#f1f4fb;border-radius:999px;padding:1px 6px}
.msg-actions{display:flex;gap:2px;margin-top:6px;opacity:.8;transition:.15s}
.msg:hover .msg-actions{opacity:1}
.msg.user .msg-actions{justify-content:flex-end}
.act{width:28px;height:28px;border:0;background:transparent;border-radius:7px;color:#9aa3b5;
  cursor:pointer;display:grid;place-items:center;transition:background .15s,color .15s}
.act .ico{width:15px;height:15px;stroke-width:2}
.act:hover{background:#f1f5fc;color:#4a5266}
.act.on{color:#3b6cf6}
.act.on .ico{stroke-width:2.2}

/* 等待回复的加载态（对齐演示系统） */
.card.pending{padding:14px 18px}
.typing-wrap{display:inline-flex;align-items:center;gap:8px}
.typing{display:inline-flex;align-items:center;gap:4px}
.typing i{width:6px;height:6px;border-radius:50%;background:#8fb3ff;display:block;animation:typingBounce 1.2s infinite ease-in-out}
.typing i:nth-child(2){animation-delay:.16s}
.typing i:nth-child(3){animation-delay:.32s}
@keyframes typingBounce{0%,70%,100%{transform:translateY(0);opacity:.45}35%{transform:translateY(-4px);opacity:1}}
.typing-text{font-size:14px;color:#8b93a7}
.card.pending + .msg-foot{display:none}

/* ================= 登录 / 注册 ================= */
.auth-mask{position:fixed;inset:0;z-index:300;display:grid;place-items:center;
  background:radial-gradient(900px 500px at 50% 0%,#eaf2ff 0%,#f7f9fd 60%);}
.auth-mask[hidden]{display:none}
.auth-card{width:min(400px,92vw);background:#fff;border:1px solid #e8eef9;border-radius:20px;
  padding:32px 30px 26px;box-shadow:0 24px 60px rgba(40,80,160,.12)}
.auth-brand{display:flex;align-items:center;gap:12px;margin-bottom:24px}
.auth-brand h2{margin:0;font-size:20px;letter-spacing:-.2px}
.auth-brand p{margin:2px 0 0;font-size:12px;color:#9aa3b5}
.auth-tabs{display:flex;gap:6px;background:#f1f4fb;border-radius:10px;padding:4px;margin-bottom:18px}
.auth-tabs button{flex:1;border:0;background:transparent;border-radius:8px;padding:9px;font-size:13.5px;
  color:#6b7488;cursor:pointer;transition:.15s}
.auth-tabs button.on{background:#fff;color:#2a3242;font-weight:600;box-shadow:0 1px 3px rgba(30,60,120,.1)}
#authForm label{display:block;font-size:12px;color:#6b7488;margin-bottom:14px}
#authForm input{display:block;width:100%;margin-top:6px;padding:11px 13px;border:1px solid #e6ecf8;
  border-radius:10px;font-size:14px;background:#fbfcff;outline:none;font-family:inherit}
#authForm input:focus{border-color:#cfdcf7;background:#fff}
.auth-submit{width:100%;border:0;border-radius:10px;padding:12px;font-size:14.5px;color:#fff;cursor:pointer;
  background:linear-gradient(135deg,#6b96ff,#3b6cf6);box-shadow:0 8px 20px rgba(59,108,246,.26)}
.auth-submit:hover{box-shadow:0 10px 24px rgba(59,108,246,.34)}
.auth-submit:disabled{opacity:.6;cursor:not-allowed}
.auth-hint{min-height:18px;margin:10px 0 0;font-size:12px;color:#d94848;text-align:center}

/* ================= 附件 ================= */
.attach-tray{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:8px}
.attach-tray[hidden]{display:none}
.attach-chip{display:flex;align-items:center;gap:8px;background:#f5f8ff;border:1px solid #e2ebfb;
  border-radius:10px;padding:6px 8px;font-size:12px;color:#4a5266}
.attach-chip img{width:34px;height:34px;object-fit:cover;border-radius:6px;display:block}
.attach-chip .pdf-ico{width:34px;height:34px;border-radius:6px;background:#eef3ff;display:grid;place-items:center;color:#3b6cf6}
.attach-chip .meta{display:flex;flex-direction:column;line-height:1.3}
.attach-chip .meta small{color:#9aa3b5;font-size:10.5px}
.attach-chip button{border:0;background:transparent;color:#a6aec0;cursor:pointer;font-size:15px;line-height:1;padding:0 2px}

.msg-attachments{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:8px;justify-content:flex-end}
.att-card{display:flex;align-items:center;gap:9px;background:rgba(255,255,255,.16);border-radius:10px;
  padding:6px 10px 6px 6px;font-size:12px;color:#fff}
.att-card img{width:44px;height:44px;object-fit:cover;border-radius:7px;display:block}
.att-card .meta{display:flex;flex-direction:column;line-height:1.35}
.att-card small{opacity:.8;font-size:10.5px}
.att-card.pdf{background:rgba(255,255,255,.2)}

.avatar-mini{display:grid;place-items:center;color:#fff}

.logout-btn{width:26px;height:26px;border:0;background:transparent;color:#a6aec0;border-radius:6px;cursor:pointer;display:grid;place-items:center}
.logout-btn:hover{background:#eef2fa;color:#5a6478}
.logout-btn .ico{width:15px;height:15px}

/* 附件卡片（白底版，用于用户消息上方） */
.att-card{background:#fff !important;border:1px solid #e6ecf8;color:#3a4258;box-shadow:0 1px 3px rgba(30,60,120,.06)}
.att-card small{color:#8b93a7}
.att-card .pdf-ico{width:44px;height:44px;border-radius:7px;background:#eef3ff;display:grid;place-items:center;color:#3b6cf6;font-size:11px;font-weight:600}

#authForm label[hidden]{display:none}

/* 未配置模型提示 */
.model-banner{display:flex;align-items:center;gap:10px;margin:14px auto 0;max-width:700px;
  background:#fff8ec;border:1px solid #f3e0bd;border-radius:14px;padding:10px 12px 10px 14px;
  font-size:13px;color:#8a5a12;box-shadow:0 4px 14px rgba(180,120,20,.08)}
.model-banner[hidden]{display:none}
.mb-icon{color:#c9871f;display:grid;place-items:center}
.mb-icon .ico{width:17px;height:17px}
.mb-text{flex:1;text-align:left}
.mb-btn{border:0;background:#c9871f;color:#fff;border-radius:999px;padding:6px 14px;font-size:12.5px;cursor:pointer}
.mb-btn:hover{background:#b4761a}

/* ================= 视觉打磨 ================= */
.logo svg{width:21px;height:21px}
.robot{animation:floatY 6s ease-in-out infinite}
@keyframes floatY{0%,100%{transform:translateY(0)}50%{transform:translateY(-7px)}}
.glow{animation:glowPulse 7s ease-in-out infinite}
@keyframes glowPulse{0%,100%{opacity:.8}50%{opacity:1}}
.fp-icon .ico{stroke-width:1.9}
.msg.ai .avatar svg{width:18px;height:18px}

/* 顶栏操作按钮统一 */
.topbar-actions{gap:4px}
.tb-btn{width:32px;height:32px;border-radius:8px;color:#7a8296}
.tb-btn .ico{width:16px;height:16px;stroke-width:1.8}
.tb-btn:hover{background:#f1f5fc;color:#2a3242}
.model-chip{padding:5px 9px;font-size:11.5px}