:root{
  --bg:#0e1220;
  --bg2:#141a30;
  --glass:rgba(255,255,255,.06);
  --glass-strong:rgba(255,255,255,.09);
  --border:rgba(255,255,255,.10);
  --text:#eef1fb;
  --muted:#9aa3c0;
  --accent:#6c7bff;
  --accent2:#b06cff;
  --accent3:#38c6f4;
  --ok:#2fd17f;
  --warn:#ffb454;
  --danger:#ff5d6c;
  --shadow:0 10px 40px rgba(0,0,0,.35);
  --radius:18px;
  --blur:22px;
}
[data-theme="light"]{
  --bg:#eef1fa;
  --bg2:#e2e7f6;
  --glass:rgba(255,255,255,.55);
  --glass-strong:rgba(255,255,255,.72);
  --border:rgba(20,30,80,.10);
  --text:#1c2340;
  --muted:#5a6384;
  --accent:#4b5ef0;
  --accent2:#9340e8;
  --accent3:#0e9fd8;
  --shadow:0 10px 30px rgba(60,70,140,.15);
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  background:linear-gradient(160deg,var(--bg),var(--bg2));
  color:var(--text);
  min-height:100vh;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}

/* 背景光晕 */
.aurora{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.orb{position:absolute;border-radius:50%;filter:blur(90px);opacity:.5;animation:float 18s ease-in-out infinite}
.o1{width:520px;height:520px;background:radial-gradient(circle,#6c7bff,#3a45c0);top:-120px;left:-80px}
.o2{width:480px;height:480px;background:radial-gradient(circle,#b06cff,#7a2fc0);bottom:-120px;right:-60px;animation-delay:-6s}
.o3{width:380px;height:380px;background:radial-gradient(circle,#38c6f4,#0f7fb0);top:40%;left:55%;opacity:.35;animation-delay:-12s}
@keyframes float{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(40px,-30px) scale(1.08)}}

.glass{
  background:var(--glass);
  border:1px solid var(--border);
  border-radius:var(--radius);
  backdrop-filter:blur(var(--blur)) saturate(140%);
  -webkit-backdrop-filter:blur(var(--blur)) saturate(140%);
  box-shadow:var(--shadow);
}

/* 顶栏 */
.topbar{
  position:relative;z-index:5;
  display:flex;align-items:center;justify-content:space-between;
  padding:16px 26px;max-width:1180px;margin:0 auto;
}
.brand{display:flex;align-items:center;gap:14px}
.logo{font-size:38px;line-height:1;filter:drop-shadow(0 0 14px rgba(108,123,255,.6))}
.brand-text h1{font-size:24px;font-weight:800;letter-spacing:.5px;
  background:linear-gradient(90deg,var(--accent),var(--accent2),var(--accent3));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.brand-text p{font-size:12px;color:var(--muted);margin-top:2px}
.top-actions{display:flex;gap:10px}
.icon-btn{
  width:42px;height:42px;border-radius:12px;border:1px solid var(--border);
  background:var(--glass);color:var(--text);font-size:18px;cursor:pointer;
  display:flex;align-items:center;justify-content:center;transition:.2s;
  backdrop-filter:blur(10px);text-decoration:none;
}
.icon-btn:hover{background:var(--glass-strong);transform:translateY(-1px)}

/* 标签栏 */
.tabs{
  position:relative;z-index:5;display:flex;gap:8px;padding:6px;
  max-width:1180px;margin:12px auto 20px;overflow-x:auto;
  background:var(--glass);border:1px solid var(--border);border-radius:16px;
  backdrop-filter:blur(var(--blur));
}
.tab{
  flex:1;white-space:nowrap;padding:11px 18px;border:none;border-radius:12px;
  background:transparent;color:var(--muted);font-size:14px;font-weight:600;cursor:pointer;transition:.2s;
}
.tab:hover{color:var(--text);background:var(--glass-strong)}
.tab.active{color:#fff;background:linear-gradient(120deg,var(--accent),var(--accent2));box-shadow:0 6px 18px rgba(90,90,255,.35)}
[data-theme="light"] .tab.active{color:#fff}

main{position:relative;z-index:2;max-width:1180px;margin:0 auto;padding:0 20px 60px}
.view{display:none}
.view.active{display:block;animation:fadeIn .3s ease}
@keyframes fadeIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

/* ---------- 对话页 ---------- */
.chat-layout{display:grid;grid-template-columns:250px 1fr;gap:16px;min-height:600px}
.chat-sidebar{display:flex;flex-direction:column;overflow:hidden;max-height:calc(100vh - 190px)}
.sidebar-head{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;border-bottom:1px solid var(--border)}
.sidebar-head span{font-weight:700;font-size:14px}
.mini-btn{padding:6px 12px;border:none;border-radius:9px;background:var(--accent);color:#fff;font-size:12px;font-weight:700;cursor:pointer;transition:.2s}
.mini-btn:hover{filter:brightness(1.12)}
.session-list{flex:1;overflow-y:auto;padding:8px;list-style:none}
.session-list li{padding:10px 12px;border-radius:10px;cursor:pointer;margin-bottom:4px;font-size:13px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;transition:.15s}
.session-list li:hover{background:var(--glass-strong);color:var(--text)}
.session-list li.active{background:var(--glass-strong);color:var(--text);box-shadow:inset 0 0 0 1px var(--accent)}
.chat-main{display:flex;flex-direction:column;overflow:hidden;max-height:calc(100vh - 190px)}
.chat-modelbar{display:flex;align-items:center;gap:10px;padding:12px 16px;border-bottom:1px solid var(--border)}
.chat-modelbar label{font-size:13px;color:var(--muted)}
.chat-modelbar select{
  padding:7px 10px;border-radius:9px;border:1px solid var(--border);
  background:var(--glass-strong);color:var(--text);font-size:13px;outline:none;cursor:pointer;
}
.badge{font-size:11px;padding:3px 8px;border-radius:20px;background:rgba(47,209,127,.15);color:var(--ok);font-weight:700;border:1px solid rgba(47,209,127,.3)}
.spacer{flex:1}
.status-dot{width:9px;height:9px;border-radius:50%;background:var(--muted)}
.status-dot.online{background:var(--ok);box-shadow:0 0 8px var(--ok)}
.status-dot.busy{background:var(--warn);box-shadow:0 0 8px var(--warn)}
.status-dot.offline{background:var(--danger);box-shadow:0 0 8px var(--danger)}
.chat-messages{flex:1;overflow-y:auto;padding:20px 18px;display:flex;flex-direction:column;gap:14px}
.empty-state{text-align:center;color:var(--muted);margin:auto;padding:30px}
.empty-icon{font-size:52px;margin-bottom:14px;filter:drop-shadow(0 0 16px rgba(108,123,255,.4))}
.empty-state h3{color:var(--text);font-size:18px;margin-bottom:8px}
.empty-state p{font-size:13px;line-height:1.7}
.msg{display:flex;gap:10px;max-width:92%;animation:msgIn .25s ease}
@keyframes msgIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.msg.user{align-self:flex-end;flex-direction:row-reverse}
.msg .avatar{width:34px;height:34px;border-radius:10px;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:16px}
.msg.user .avatar{background:linear-gradient(135deg,var(--accent),var(--accent2))}
.msg.bot .avatar{background:linear-gradient(135deg,var(--accent3),var(--accent2))}
.msg .bubble{padding:11px 14px;border-radius:14px;line-height:1.65;font-size:14.5px;white-space:pre-wrap;word-break:break-word}
.msg.user .bubble{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;border-top-right-radius:4px}
.msg.bot .bubble{background:var(--glass-strong);border:1px solid var(--border);border-top-left-radius:4px}
.msg.bot .bubble.error{background:rgba(255,93,108,.12);border-color:rgba(255,93,108,.4);color:var(--danger)}
.msg .meta{font-size:11px;color:var(--muted);margin-bottom:3px}
.typing-dots{display:inline-flex;gap:4px;padding:4px 2px}
.typing-dots i{width:6px;height:6px;border-radius:50%;background:var(--accent3);animation:bounce 1.2s infinite}
.typing-dots i:nth-child(2){animation-delay:.15s}.typing-dots i:nth-child(3){animation-delay:.3s}
@keyframes bounce{0%,60%,100%{transform:translateY(0);opacity:.4}30%{transform:translateY(-5px);opacity:1}}
.chat-inputbar{display:flex;gap:10px;padding:12px 16px;border-top:1px solid var(--border)}
.chat-inputbar textarea{
  flex:1;resize:none;min-height:44px;max-height:140px;padding:12px 14px;border-radius:12px;
  border:1px solid var(--border);background:var(--glass-strong);color:var(--text);font-size:14px;
  outline:none;font-family:inherit;transition:.2s;
}
.chat-inputbar textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(108,123,255,.18)}
.send-btn{padding:0 22px;border:none;border-radius:12px;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;font-weight:700;font-size:14px;cursor:pointer;transition:.2s}
.send-btn:hover{filter:brightness(1.1)}
.send-btn:disabled{opacity:.5;cursor:not-allowed}
.chat-foot{font-size:11px;color:var(--muted);padding:8px 16px;border-top:1px solid var(--border);opacity:.8}

/* ---------- 图片页 ---------- */
.image-layout{display:grid;grid-template-columns:340px 1fr;gap:16px}
.image-controls{padding:22px;align-self:start;position:sticky;top:16px}
.image-controls h2{font-size:19px;margin-bottom:6px}
.hint{font-size:12.5px;color:var(--muted);line-height:1.6;margin-bottom:16px}
.image-controls label{display:block;font-size:12.5px;font-weight:600;color:var(--muted);margin:12px 0 6px}
.image-controls textarea{
  width:100%;resize:vertical;padding:12px;border-radius:12px;border:1px solid var(--border);
  background:var(--glass-strong);color:var(--text);font-size:14px;outline:none;font-family:inherit;transition:.2s;
}
.image-controls textarea:focus{border-color:var(--accent)}
.field-row{display:flex;gap:10px}
.field-row>div{flex:1}
.field-row select,.field-row input{
  width:100%;padding:9px 10px;border-radius:10px;border:1px solid var(--border);
  background:var(--glass-strong);color:var(--text);font-size:13px;outline:none;
}
.opts{align-items:center;gap:16px;margin-top:14px}
.chk{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--muted);cursor:pointer}
.chk input{accent-color:var(--accent)}
.primary-btn{
  width:100%;margin-top:18px;padding:13px;border:none;border-radius:12px;
  background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;font-size:15px;font-weight:700;cursor:pointer;transition:.2s;
}
.primary-btn:hover{filter:brightness(1.08);transform:translateY(-1px)}
.primary-btn:disabled{opacity:.5;cursor:not-allowed;transform:none}
.gen-status{margin-top:12px;font-size:12.5px;color:var(--muted);min-height:18px;line-height:1.5}
.image-results{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px;align-content:start}
.image-card{overflow:hidden;border-radius:var(--radius);position:relative;background:var(--glass);border:1px solid var(--border)}
.image-card img{width:100%;display:block;aspect-ratio:1;object-fit:cover;background:#111}
.image-card .img-foot{display:flex;align-items:center;justify-content:space-between;padding:10px 12px}
.image-card .img-foot span{font-size:11px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.dl-btn{padding:6px 12px;border:none;border-radius:8px;background:var(--accent);color:#fff;font-size:12px;font-weight:700;cursor:pointer;text-decoration:none}
.dl-btn:hover{filter:brightness(1.1)}
.img-loading{display:flex;align-items:center;justify-content:center;min-height:240px;color:var(--muted);font-size:14px;gap:10px}
.spinner{width:22px;height:22px;border-radius:50%;border:3px solid var(--border);border-top-color:var(--accent);animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- 官方入口页 ---------- */
.portals-head{padding:24px;margin-bottom:16px}
.portals-head h2{font-size:22px;margin-bottom:8px}
.portal-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}
.portal-card{padding:20px;display:flex;flex-direction:column;gap:8px;transition:.2s;position:relative;overflow:hidden}
.portal-card:hover{transform:translateY(-3px);border-color:var(--accent)}
.portal-card .p-logo{font-size:34px}
.portal-card h3{font-size:17px}
.portal-card .p-desc{font-size:12.5px;color:var(--muted);line-height:1.55;flex:1}
.portal-card .p-tags{display:flex;gap:6px;flex-wrap:wrap}
.tag{font-size:11px;padding:3px 8px;border-radius:20px;font-weight:600}
.tag.free{background:rgba(47,209,127,.15);color:var(--ok);border:1px solid rgba(47,209,127,.3)}
.tag.login{background:rgba(255,180,84,.15);color:var(--warn);border:1px solid rgba(255,180,84,.3)}
.tag.ft{background:rgba(56,198,244,.15);color:var(--accent3);border:1px solid rgba(56,198,244,.3)}
.tag.rich{background:rgba(176,108,255,.15);color:var(--accent2);border:1px solid rgba(176,108,255,.3)}
.open-btn{margin-top:6px;padding:10px;border:none;border-radius:10px;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;font-weight:700;font-size:13px;cursor:pointer;transition:.2s;text-align:center;text-decoration:none}
.open-btn:hover{filter:brightness(1.08)}
.portals-note{padding:20px;margin-top:16px}
.portals-note h3{margin-bottom:10px}
.portals-note ul{padding-left:20px;color:var(--muted);font-size:13px;line-height:2}

/* ---------- 导入页 ---------- */
.import-layout{max-width:760px;margin:0 auto}
.import-box{padding:26px}
.import-box h2{font-size:21px;margin-bottom:6px}
.dropzone{
  margin-top:18px;border:2px dashed var(--border);border-radius:var(--radius);padding:30px;text-align:center;
  cursor:pointer;transition:.2s;background:var(--glass);
}
.dropzone:hover,.dropzone.drag{border-color:var(--accent);background:var(--glass-strong)}
.dz-icon{font-size:40px;margin-bottom:10px}
.dz-inner p{font-size:14px}
.dz-sub{font-size:12px;color:var(--muted);margin-top:6px}
.or-divider{display:flex;align-items:center;gap:12px;color:var(--muted);font-size:12px;margin:20px 0}
.or-divider::before,.or-divider::after{content:"";flex:1;height:1px;background:var(--border)}
.import-box textarea{
  width:100%;resize:vertical;padding:12px;border-radius:12px;border:1px solid var(--border);
  background:var(--glass-strong);color:var(--text);font-size:13px;outline:none;font-family:ui-monospace,Consolas,monospace;transition:.2s;
}
.import-box textarea:focus{border-color:var(--accent)}
.import-actions{display:flex;gap:10px;margin-top:14px}
.import-actions .primary-btn{width:auto;margin:0;padding:11px 20px;font-size:13px}
.ghost-btn{padding:11px 18px;border:1px solid var(--border);border-radius:11px;background:var(--glass);color:var(--text);font-size:13px;cursor:pointer;transition:.2s}
.ghost-btn:hover{background:var(--glass-strong)}
.danger-btn{padding:11px 18px;border:1px solid rgba(255,93,108,.4);border-radius:11px;background:rgba(255,93,108,.12);color:var(--danger);font-size:13px;cursor:pointer;transition:.2s}
.danger-btn:hover{background:rgba(255,93,108,.2)}
.import-result{margin-top:16px}
.imp-summary{padding:14px;border-radius:12px;background:rgba(47,209,127,.08);border:1px solid rgba(47,209,127,.3);font-size:13px;line-height:1.7}
.imp-preview{max-height:360px;overflow-y:auto;margin-top:10px;padding:12px;border-radius:12px;background:var(--glass-strong);border:1px solid var(--border)}
.imp-preview .line{padding:4px 8px;border-radius:6px;font-size:12.5px;margin:2px 0}
.imp-preview .line.u{color:var(--accent)}
.imp-preview .line.a{color:var(--text);opacity:.9}

/* ---------- 设置页 ---------- */
.settings-wrap{max-width:680px;margin:0 auto}
.settings-card{padding:26px}
.settings-card h2{font-size:21px;margin-bottom:18px}
.set-row{display:flex;align-items:center;gap:14px;padding:12px 0;border-bottom:1px solid var(--border);flex-wrap:wrap}
.set-row>span:first-child{font-weight:600;font-size:14px;min-width:90px}
.set-desc{font-size:12.5px;color:var(--muted);line-height:1.6;flex:1;min-width:200px}
.settings-card hr{border:none;border-top:1px solid var(--border);margin:16px 0}
.settings-card h3{font-size:16px;margin-bottom:8px}
.about{font-size:13px;color:var(--muted);line-height:1.8}
.muted{color:var(--muted);font-size:13px}

/* Toast */
.toast{
  position:fixed;bottom:28px;left:50%;transform:translateX(-50%) translateY(20px);z-index:99;
  background:var(--glass-strong);border:1px solid var(--border);border-radius:12px;padding:12px 20px;
  font-size:13px;backdrop-filter:blur(16px);box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:.3s;max-width:80%;
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* Modal */
.modal{position:fixed;inset:0;z-index:80;background:rgba(8,10,24,.6);backdrop-filter:blur(6px);display:flex;align-items:center;justify-content:center;padding:20px}
.modal.hidden{display:none}
.modal-card{width:100%;max-width:680px;max-height:82vh;display:flex;flex-direction:column}
.modal-head{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--border)}
.modal-body{flex:1;overflow-y:auto;padding:16px 20px;font-size:13.5px;line-height:1.7}
.modal-body .mline{padding:5px 10px;border-radius:8px;margin:3px 0}
.modal-body .mline.u{background:rgba(108,123,255,.12)}
.modal-body .mline.a{background:var(--glass-strong)}
.modal-foot{display:flex;justify-content:flex-end;gap:10px;padding:14px 20px;border-top:1px solid var(--border)}
.modal-foot .primary-btn{width:auto;margin:0;padding:11px 20px;font-size:13px}

/* 滚动条 */
::-webkit-scrollbar{width:9px;height:9px}
::-webkit-scrollbar-thumb{background:rgba(120,130,180,.35);border-radius:10px}
::-webkit-scrollbar-track{background:transparent}

@media (max-width:900px){
  .chat-layout{grid-template-columns:1fr}
  .chat-sidebar{max-height:none;flex-direction:row}
  .sidebar-head{display:none}
  .session-list{display:flex;overflow-x:auto;padding:6px}
  .session-list li{flex-shrink:0}
  .chat-main{max-height:calc(100vh - 160px)}
  .image-layout{grid-template-columns:1fr}
  .image-controls{position:static}
  .image-results{grid-template-columns:repeat(auto-fill,minmax(200px,1fr))}
}
@media (max-width:600px){
  .topbar{padding:12px 14px}
  .tabs{margin-top:6px}
  main{padding:0 12px 50px}
  .brand-text p{display:none}
  .chat-modelbar{flex-wrap:wrap}
}