:root{
  --ink:#0f1115;--muted:#6b7484;--muted2:#98a1b0;
  --line:rgba(28,38,58,.08);
  --green:#28c76b;--blue:#2f7df6;--violet:#7c6cf0;
  --glass-shadow:0 16px 46px rgba(66,84,120,.14);
  --radius:20px;
  --safe-top:env(safe-area-inset-top);
  --safe-bottom:env(safe-area-inset-bottom);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;height:100%;font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","PingFang SC","Helvetica Neue",Segoe UI,Roboto,sans-serif;background:#fff;color:var(--ink)}
body{overflow:hidden;font-size:17px;line-height:1.5}
button,input,textarea{font:inherit;color:inherit;outline:none}
button{border:0;background:none;cursor:pointer}
input,textarea{border:0}
b{font-weight:640}
small{font-size:12.5px;color:var(--muted)}
i{font-style:normal}

/* ambient liquid background */
#app{height:100%;position:relative;overflow:hidden;
  background:
    radial-gradient(620px 460px at 6% 8%,rgba(121,170,255,.16),transparent 66%),
    radial-gradient(560px 440px at 96% 12%,rgba(150,120,255,.13),transparent 64%),
    radial-gradient(700px 520px at 50% 108%,rgba(60,220,170,.10),transparent 60%),
    linear-gradient(#ffffff,#f7f9fe);
}
main{height:100%;max-width:720px;margin:auto;position:relative;display:flex;flex-direction:column}

/* liquid glass surface */
.liquid{
  background:linear-gradient(135deg,rgba(255,255,255,.82),rgba(255,255,255,.58));
  border:1px solid rgba(255,255,255,.9);
  backdrop-filter:blur(28px) saturate(180%);
  -webkit-backdrop-filter:blur(28px) saturate(180%);
  box-shadow:inset 0 1px rgba(255,255,255,.95),var(--glass-shadow);
}

/* ============ TOP BAR ============ */
.topbar{
  padding:calc(var(--safe-top) + 12px) 16px 4px;
  display:grid;grid-template-columns:46px 1fr auto;align-items:center;gap:6px;z-index:20;flex:0 0 auto;
}
.top-icon{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;font-size:22px;color:var(--ink);transition:transform .12s,background .12s}
.top-icon:active{background:rgba(0,0,0,.06);transform:scale(.94)}
.top-icon.dots{font-size:20px;letter-spacing:1px}
.top-actions{display:flex;gap:0}

/* 聊天/工作 分段切换器 */
.mode-switch{justify-self:center;position:relative;display:flex;padding:3px;border-radius:999px;background:rgba(20,24,34,.06);width:172px}
.mode-btn{flex:1;position:relative;z-index:2;padding:7px 0;border-radius:999px;font-size:15px;font-weight:560;color:var(--muted);transition:color .22s}
.mode-btn.active{color:var(--ink)}
.mode-thumb{position:absolute;top:3px;left:3px;width:calc(50% - 3px);height:calc(100% - 6px);border-radius:999px;background:#fff;box-shadow:0 2px 8px rgba(60,80,120,.16);transition:transform .26s cubic-bezier(.32,.72,.28,1);z-index:1}
.mode-switch.work .mode-thumb{transform:translateX(100%)}

/* 品牌 + 模型选择器（下移到切换器下方一行） */
.brand-sub{display:flex;align-items:center;justify-content:center;gap:7px;margin:0 auto 2px;height:26px;padding:0 12px;border-radius:12px;flex:0 0 auto;transition:background .12s}
.brand-sub:active{background:rgba(0,0,0,.05)}
.brand-sub b{font-size:15px;letter-spacing:-.02em}
.brand-sub .green-dot{width:7px;height:7px;border-radius:50%;background:var(--green);box-shadow:0 0 0 3px rgba(40,199,107,.14)}
.brand-sub span{font-size:13.5px;color:var(--muted)}
.brand-sub .caret{font-size:12px;color:var(--muted2)}

/* ============ PANELS ============ */
.panel{display:none;flex:1 1 auto;min-height:0;position:relative}
.panel.active{display:flex;flex-direction:column}
.page{position:fixed;inset:0;max-width:720px;margin:auto;z-index:70;flex-direction:column;
  background:
    radial-gradient(620px 460px at 6% 8%,rgba(121,170,255,.16),transparent 66%),
    radial-gradient(560px 440px at 96% 12%,rgba(150,120,255,.13),transparent 64%),
    linear-gradient(#ffffff,#f7f9fe)}
.page.active{animation:slideIn .26s cubic-bezier(.32,.72,.28,1)}
@keyframes slideIn{from{transform:translateX(100%)}to{transform:translateX(0)}}
.page-head{display:grid;grid-template-columns:46px 1fr 46px;align-items:center;padding:calc(var(--safe-top) + 8px) 12px 8px}
.page-head h2{margin:0;font-size:19px;font-weight:660;text-align:center;letter-spacing:-.02em}
.page-head [data-back]{font-size:28px;color:var(--ink);width:44px;height:44px;border-radius:50%;justify-self:start}
.page-head [data-back]:active{background:rgba(0,0,0,.06)}
.page-head .ghost{justify-self:end;color:var(--muted2);font-size:22px;letter-spacing:2px;width:44px;height:44px}
.page-body{flex:1 1 auto;overflow-y:auto;padding:6px 18px calc(var(--safe-bottom) + 28px);scrollbar-width:none}
.page-body::-webkit-scrollbar{display:none}
.page-sub{margin:2px 2px 16px;color:var(--muted);font-size:14px}

/* ============ CHAT ============ */
#chat.active{display:flex;flex-direction:column}
.chat-scroll{flex:1 1 auto;overflow-y:auto;padding:6px 18px 20px;scrollbar-width:none}
.chat-scroll::-webkit-scrollbar{display:none}
.empty-state{min-height:64vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:10px;padding:0 24px}
.empty-state .spark{width:60px;height:60px;border-radius:20px;display:grid;place-items:center;font-size:30px;
  background:linear-gradient(135deg,rgba(47,125,246,.16),rgba(124,108,240,.16));border:1px solid rgba(255,255,255,.7);
  backdrop-filter:blur(10px);box-shadow:var(--glass-shadow);margin-bottom:6px}
.empty-state h1{margin:0;font-size:29px;font-weight:680;letter-spacing:-.03em}
.empty-state p{margin:0;color:var(--muted);font-size:16px}
.temporary-banner{width:max-content;max-width:92%;margin:0 auto 14px;padding:7px 14px;border-radius:999px;background:rgba(120,90,240,.1);color:#6a52e0;font-size:12.5px}
.messages{max-width:680px;margin:0 auto;width:100%;display:flex;flex-direction:column;gap:16px;padding-top:6px}
.msg{font-size:16.5px;line-height:1.62;animation:msgIn .3s ease}
@keyframes msgIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.msg.user{align-self:flex-end;max-width:82%;background:rgba(20,22,28,.045);border:1px solid rgba(255,255,255,.6);border-radius:20px;padding:11px 15px}
.msg.ai{align-self:stretch;max-width:100%}
.msg.ai .who{display:flex;align-items:center;gap:7px;margin-bottom:5px}
.msg.ai .who .dot{width:20px;height:20px;border-radius:7px;display:grid;place-items:center;font-size:12px;background:linear-gradient(135deg,var(--blue),var(--violet));color:#fff}
.msg.ai .who small{color:var(--muted2)}
.msg .body{white-space:pre-wrap;word-break:break-word}
.msg .meta{display:block;color:var(--muted2);font-size:11px;margin-top:4px}
.working{display:flex;align-items:center;gap:9px;color:var(--muted);font-size:14px;padding:4px 2px;max-width:680px;margin:0 auto;width:100%}
.working i{width:16px;height:16px;border-radius:50%;border:2px solid rgba(47,125,246,.25);border-top-color:var(--blue);animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.hidden{display:none!important}

/* ============ COMPOSER ============ */
.composer{margin:0 14px calc(var(--safe-bottom) + 12px);padding:8px 8px 8px 6px;display:flex;align-items:flex-end;gap:6px;border-radius:26px;flex:0 0 auto}
.composer-circle{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;font-size:20px;flex:0 0 auto;transition:transform .12s,background .12s;color:var(--ink)}
.composer-circle:active{transform:scale(.9)}
.composer-circle.plus{font-size:24px;color:var(--muted)}
.composer-circle.plus:active{background:rgba(0,0,0,.06)}
.composer textarea{flex:1 1 auto;resize:none;max-height:132px;padding:8px 4px;background:transparent;font-size:16px;line-height:1.4}
.composer .send{background:linear-gradient(135deg,var(--blue),var(--violet));color:#fff;box-shadow:0 6px 16px rgba(60,100,240,.34)}
.composer .send:disabled{opacity:.4;box-shadow:none}
.composer .mic{color:var(--muted)}

/* popups above composer */
.popup{position:absolute;left:16px;bottom:calc(var(--safe-bottom) + 76px);z-index:40;border-radius:18px;padding:6px;min-width:186px;display:flex;flex-direction:column;animation:popIn .18s ease}
@keyframes popIn{from{opacity:0;transform:translateY(8px) scale(.97)}to{opacity:1;transform:none}}
.popup button{display:flex;align-items:center;gap:12px;padding:11px 12px;border-radius:12px;font-size:15px;text-align:left;transition:background .12s}
.popup button:active{background:rgba(0,0,0,.05)}
.popup button span:first-child{width:22px;text-align:center;color:var(--muted)}
.popup button.on span:first-child{color:var(--green)}
.more-popup{left:auto;right:16px}
/* ChatGPT 式上下文菜单：从顶部 ··· 下拉 */
.more-menu{left:auto;right:12px;bottom:auto;top:calc(var(--safe-top) + 60px);min-width:224px;padding:7px}
.more-menu button{justify-content:flex-start;gap:14px;padding:12px 12px;font-size:16px}
.more-menu button span:first-child{width:22px;font-size:17px;color:var(--ink)}
.more-menu button .chev{margin-left:auto;color:var(--muted2);font-size:16px}
.more-menu button.danger,.more-menu button.danger span:first-child{color:#e2564d}
.menu-divider{height:1px;background:var(--line);margin:6px 10px}

/* ============ DRAWER ============ */
.scrim{position:absolute;inset:0;background:rgba(18,24,40,.28);backdrop-filter:blur(2px);opacity:0;pointer-events:none;transition:opacity .28s;z-index:50}
.scrim.show{opacity:1;pointer-events:auto}
.drawer{position:absolute;top:0;left:0;bottom:0;width:min(84%,340px);z-index:60;transform:translateX(-104%);transition:transform .3s cubic-bezier(.32,.72,.28,1);display:flex;flex-direction:column;border-radius:0 24px 24px 0;padding:calc(var(--safe-top) + 14px) 12px calc(var(--safe-bottom) + 14px)}
.drawer.show{transform:none}
.drawer-search{display:flex;align-items:center;gap:8px;padding:10px 14px;margin:0 4px 12px;border-radius:14px;background:rgba(20,24,34,.05);color:var(--muted)}
.drawer-search input{flex:1;background:transparent;font-size:15px}
.drawer-item{display:flex;align-items:center;gap:13px;padding:12px 14px;border-radius:13px;font-size:16px;transition:background .12s;width:100%;text-align:left}
.drawer-item:active{background:rgba(0,0,0,.05)}
.drawer-item span:first-child{width:22px;text-align:center;font-size:17px;color:var(--muted)}
.drawer-item b{flex:1;font-weight:560}
.drawer-item i{color:var(--muted2);font-size:15px}
.primary-item{margin-bottom:6px}
.primary-item span:first-child{color:var(--blue)}
.drawer-history-label{font-size:12px;color:var(--muted2);font-weight:600;padding:8px 14px 4px}
.drawer-history{flex:1 1 auto;overflow-y:auto;scrollbar-width:none;display:flex;flex-direction:column;gap:1px;min-height:40px}
.drawer-history::-webkit-scrollbar{display:none}
.history-row{display:flex;align-items:center;gap:10px;padding:11px 14px;border-radius:12px;transition:background .12s;width:100%;text-align:left}
.history-row:active{background:rgba(0,0,0,.05)}
.history-row .h-title{flex:1;font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--ink)}
.history-empty{padding:14px;color:var(--muted2);font-size:13.5px;text-align:center}
.drawer-tools{display:flex;flex-direction:column;gap:1px;padding-top:8px;border-top:1px solid var(--line);margin-top:6px}
.drawer-profile{display:flex;align-items:center;gap:11px;padding:10px 12px;margin-top:8px;border-top:1px solid var(--line)}
.drawer-profile .avatar{width:36px;height:36px;border-radius:50%;display:grid;place-items:center;font-weight:640;color:#fff;background:linear-gradient(135deg,var(--blue),var(--violet))}
.drawer-profile b{flex:1}
.drawer-profile button{color:var(--muted2);font-size:20px;letter-spacing:1px}

/* ============ CARDS / LISTS ============ */
.section-label{font-size:12.5px;color:var(--muted2);font-weight:600;margin:20px 4px 9px;letter-spacing:.02em}
.section-label.row{display:flex;justify-content:space-between;align-items:center}
.section-label.row button{color:var(--blue);font-size:13px;font-weight:560}
.settings-card{border-radius:var(--radius);overflow:hidden;margin-bottom:14px}
.setting-row{display:flex;align-items:center;gap:12px;padding:14px 16px;width:100%;text-align:left}
.setting-row+.setting-row{border-top:1px solid var(--line)}
.setting-row>span:first-child{flex:1;display:flex;flex-direction:column;gap:2px}
.setting-row i{color:var(--muted2);font-size:18px}

/* toggle switch */
.switch{position:relative;width:50px;height:30px;flex:0 0 auto}
.switch input{position:absolute;opacity:0;width:100%;height:100%;margin:0;cursor:pointer;z-index:2}
.switch em{position:absolute;inset:0;border-radius:999px;background:rgba(120,130,150,.28);transition:background .2s}
.switch em:before{content:"";position:absolute;top:3px;left:3px;width:24px;height:24px;border-radius:50%;background:#fff;box-shadow:0 2px 6px rgba(0,0,0,.2);transition:transform .22s cubic-bezier(.32,.72,.28,1)}
.switch input:checked+em{background:var(--green)}
.switch input:checked+em:before{transform:translateX(20px)}

.list{display:flex;flex-direction:column;gap:10px}
.list-card{border-radius:16px;padding:14px 16px;display:flex;flex-direction:column;gap:3px}
.list-card b{font-size:15.5px}
.empty-card{border-radius:var(--radius);padding:30px 22px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:8px}
.empty-card .big-icon{font-size:34px;opacity:.5;margin-bottom:2px}
.empty-card h3{margin:0;font-size:17px}
.empty-card p{margin:0;color:var(--muted);font-size:14px}
.primary{margin-top:8px;padding:11px 20px;border-radius:14px;background:linear-gradient(135deg,var(--blue),var(--violet));color:#fff;font-weight:560;font-size:15px;box-shadow:0 6px 16px rgba(60,100,240,.3)}
.primary:active{transform:scale(.97)}
.secondary{padding:11px 18px;border-radius:14px;background:rgba(20,24,34,.05);font-weight:560;font-size:15px}

/* ============ MEMORY CENTER ============ */
.memory-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:6px}
.stat{border-radius:16px;padding:14px 12px;text-align:center;display:flex;flex-direction:column;gap:3px}
.stat small{color:var(--muted2);font-size:12px}
.stat b{font-size:24px;font-weight:680;letter-spacing:-.02em}
.memory-cats{border-radius:var(--radius);overflow:hidden}
.memory-cats button{display:flex;align-items:center;gap:13px;padding:13px 16px;width:100%;text-align:left}
.memory-cats button+button{border-top:1px solid var(--line)}
.cat-icon{width:34px;height:34px;border-radius:11px;display:grid;place-items:center;font-size:16px;color:#fff;flex:0 0 auto}
.cat-icon.green{background:linear-gradient(135deg,#2bd67b,#12b866)}
.cat-icon.blue{background:linear-gradient(135deg,#3f8bff,#2f7df6)}
.cat-icon.violet{background:linear-gradient(135deg,#8f7cff,#7c6cf0)}
.cat-icon.amber{background:linear-gradient(135deg,#ffb44d,#ff9a2e)}
.cat-icon.cyan{background:linear-gradient(135deg,#3ad6d6,#1fb6c9)}
.memory-cats button>span:nth-child(2){flex:1;display:flex;flex-direction:column;gap:1px}
.memory-cats em{font-style:normal;color:var(--muted);font-weight:600;margin-right:6px}
.memory-cats i{color:var(--muted2)}
.mem-item{border-radius:14px;padding:12px 14px}
.mem-item .tag{display:inline-block;font-size:11px;padding:2px 9px;border-radius:999px;background:rgba(47,125,246,.12);color:var(--blue);margin-bottom:6px}
.mem-item p{margin:0;font-size:14.5px;line-height:1.5}

/* ============ CAPABILITY CENTER ============ */
.cap-tabs{display:flex;gap:7px;padding:4px 18px 12px;overflow-x:auto;scrollbar-width:none}
.cap-tabs::-webkit-scrollbar{display:none}
.cap-tabs button{padding:8px 15px;border-radius:999px;font-size:14px;background:rgba(20,24,34,.05);color:var(--muted);white-space:nowrap;transition:all .15s}
.cap-tabs button.active{background:var(--ink);color:#fff}
.capability-list{display:flex;flex-direction:column;gap:11px}
.cap-card{border-radius:16px;padding:14px 15px;display:flex;align-items:center;gap:13px}
.cap-card .cap-ic{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;font-size:19px;flex:0 0 auto;background:rgba(47,125,246,.1);color:var(--blue)}
.cap-card.off .cap-ic{background:rgba(120,130,150,.12);color:var(--muted2)}
.cap-card .cap-main{flex:1;display:flex;flex-direction:column;gap:2px;min-width:0}
.cap-card .cap-main b{display:flex;align-items:center;gap:7px}
.cap-badge{font-size:10.5px;padding:1px 7px;border-radius:999px;font-weight:600}
.cap-badge.beta{background:rgba(124,108,240,.14);color:var(--violet)}
.cap-badge.future{background:rgba(120,130,150,.14);color:var(--muted)}

/* ============ MODEL CONFIG ============ */
.model-list{border-radius:var(--radius);overflow:hidden;margin-bottom:14px}
.model-row{display:flex;align-items:center;gap:13px;padding:14px 16px;width:100%;text-align:left}
.model-row+.model-row{border-top:1px solid var(--line)}
.model-row .logo{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;font-weight:660;font-size:17px;color:#fff;flex:0 0 auto}
.logo.ds{background:linear-gradient(135deg,#4d6bfe,#3a55e0)}
.logo.km{background:linear-gradient(135deg,#16151a,#3a3a44)}
.logo.qw{background:linear-gradient(135deg,#615ced,#7b4dff)}
.logo.qg{background:linear-gradient(135deg,#00b48a,#00a271)}
.logo.qc{background:linear-gradient(135deg,#d97539,#c25e28)}
.model-row .m-main{flex:1;display:flex;flex-direction:column;gap:2px;min-width:0}
.model-row .m-state{font-size:12.5px;font-weight:560;color:var(--muted2);margin-right:4px}
.model-row .m-state.ok{color:var(--green)}
.model-row i{color:var(--muted2)}

/* ============ MODAL ============ */
.modal{position:absolute;inset:0;z-index:80;display:flex;align-items:flex-end;justify-content:center;background:rgba(18,24,40,.34);backdrop-filter:blur(3px);animation:fade .2s ease}
@keyframes fade{from{opacity:0}to{opacity:1}}
.modal-card{width:100%;max-width:520px;border-radius:26px 26px 0 0;padding:22px 20px calc(var(--safe-bottom) + 24px);position:relative;animation:sheetUp .3s cubic-bezier(.32,.72,.28,1)}
@keyframes sheetUp{from{transform:translateY(100%)}to{transform:none}}
.modal-card .grip{width:38px;height:4px;border-radius:2px;background:rgba(120,130,150,.3);margin:-8px auto 14px}
.modal-close{position:absolute;top:16px;right:16px;width:32px;height:32px;border-radius:50%;background:rgba(20,24,34,.06);font-size:19px;color:var(--muted);display:grid;place-items:center}
.modal-card h2{margin:0 0 4px;font-size:20px;font-weight:660}
.modal-card .m-desc{margin:0 0 18px;color:var(--muted);font-size:14px}
.modal-card label{display:block;font-size:13px;color:var(--muted);margin:14px 2px 6px;font-weight:560}
.modal-card input{width:100%;padding:13px 14px;border-radius:13px;background:rgba(20,24,34,.05);border:1px solid transparent;font-size:15px;transition:border .15s,background .15s}
.modal-card input:focus{background:#fff;border-color:rgba(47,125,246,.4)}
.keyline{display:flex;gap:8px;align-items:stretch}
.keyline input{flex:1}
.keyline button{padding:0 14px;border-radius:13px;background:rgba(20,24,34,.05);font-size:13px;color:var(--muted);font-weight:560}
.modal-card .primary{width:100%;margin-top:20px;padding:14px}
.advanced-btn{width:100%;margin-top:10px;padding:11px;font-size:14px;color:var(--muted);font-weight:560}
.state{margin-top:14px;text-align:center;font-size:14px;min-height:20px;color:var(--muted)}
.state.ok{color:var(--green)}
.state.err{color:#e2564d}

@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

/* toast */
.toast{position:fixed;left:50%;bottom:calc(var(--safe-bottom) + 96px);transform:translateX(-50%) translateY(10px);
  z-index:90;padding:11px 18px;border-radius:14px;font-size:14px;color:#fff;
  background:rgba(20,24,34,.9);backdrop-filter:blur(10px);box-shadow:0 8px 24px rgba(0,0,0,.24);
  opacity:0;pointer-events:none;transition:opacity .22s,transform .22s;max-width:80%;text-align:center}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}