/* 小信鸽：深蓝文字、亮蓝交互与浅蓝服务背景。保留原始红色品牌标志。 */
:root{--accent:#087ff5;--line:#e1ecf9;--muted:#7692af}
.brand-logo{width:43px;height:43px;object-fit:contain;flex-shrink:0;background:#fff;border-radius:11px}
.brand{gap:9px;padding:0 3px 25px}.brand strong{font-size:17px;letter-spacing:0;color:#06376a}.brand div>span{font-size:9px;letter-spacing:.5px;color:#5f8bb7}
.sidebar{background:linear-gradient(180deg,#fff 0%,#f5faff 50%,#edf5ff 100%);border-color:#dce9f9}
.new-chat{background:linear-gradient(100deg,#078bff,#066ce1);color:white;border:0;box-shadow:0 5px 13px #0079f01c}.new-chat .key-hint{color:#c6e5ff}.new-chat:hover{background:linear-gradient(100deg,#087ef0,#075dd0)}
.nav-item{color:#6483a7}.nav-item.active{color:#0076eb;background:#e7f2ff;border-right:3px solid #0785fa}.sidebar-heading{color:#8ca5bf}.search-field{background:#fff;border-color:#dce9f9}.conversation-item{color:#5e7a99}.conversation-item.selected{background:#eaf4ff;color:#0876e1;box-shadow:none}.conversation-item:hover{background:#edf6ff}.account small{color:#7296bb}
.main{background:#fff}.topbar{border-bottom-color:#dfebf8;box-shadow:0 1px 8px #0f69bf04}.topbar-title strong{color:#07376a;font-size:14px}.topbar-title span{color:#8ba4be}.model-badge{background:#edf7ff;color:#0875d7;border-color:#cce7ff}.status-dot{background:#14a3f4}
.welcome{max-width:860px;margin:30px auto 16px;padding:29px 36px 30px;border:1px solid #dcecff;border-radius:18px;position:relative;isolation:isolate;overflow:hidden;background:linear-gradient(125deg,#f8fcff 10%,#edf7ff 62%,#deefff 100%)}
.welcome:after{content:"";position:absolute;z-index:-1;width:390px;height:390px;right:-200px;top:-150px;border:1px solid #bedfff80;border-radius:50%;box-shadow:0 0 0 32px #d7eaff55,0 0 0 65px #d7eaff40,0 0 0 98px #d7eaff25}
.welcome-orbit{height:70px;margin:0 0 15px}.welcome-orbit:before{width:190px;height:100px;background:radial-gradient(ellipse,#bddfff88,transparent 70%)}
.welcome-symbol{width:68px;height:68px;transform:none;border-radius:50%;background:#fff;border:1px solid #cce7ff;box-shadow:0 7px 25px #0784f814}.welcome-symbol img{width:54px;height:54px;object-fit:contain}
.eyebrow{color:#1886dc;letter-spacing:1.4px}.welcome h1{font-size:28px;color:#06376a;margin:13px 0 12px;font-weight:650;letter-spacing:0}.welcome>p{font-size:13px;line-height:1.85;color:#6e90b1}
.welcome-tags{display:flex;justify-content:center;gap:8px;margin-top:15px}.welcome-tags span{background:#fff8;color:#2386dd;border:1px solid #cfe5ff;border-radius:18px;font-size:10px;padding:5px 13px}
.suggestions{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:25px}.suggestions button{padding:18px 20px;background:#ffffffed;border-color:#d4e6fc;border-radius:11px;box-shadow:0 4px 12px #196ac105}.suggestions button:hover{border-color:#81bdf5;background:#fff;box-shadow:0 7px 20px #0e7fef12}.suggestions button>span{color:#3c98e7;font-size:9px;letter-spacing:.7px;margin-bottom:9px}.suggestions strong{font-size:14px;color:#0c467f}.suggestions small{color:#8ba4be;font-size:11px;margin-top:9px}.suggestions b{color:#168cf1}
.assistant-avatar{background:#fff;border:1px solid #dcecff;box-shadow:0 2px 8px #137af20b}.assistant-avatar img{width:27px;height:27px;object-fit:contain}.message-label{color:#7c9abb}.user-avatar{background:#e9f3ff;color:#3f83c5}.user-message .message-content{background:#f0f7ff;border-color:#e2edfb;color:#284e76}.markdown{color:#345371}.markdown h1,.markdown h2,.markdown h3,.markdown strong{color:#07376a}.markdown a{color:#0781ef}.markdown th{background:#eaf5ff;color:#0b5da8}.markdown pre{background:#f4f9ff;border-color:#dceafa}.markdown code{color:#1969ae}.markdown blockquote{border-color:#70b9ff;background:#f0f8ff}.code-copy{color:#5a90bf;border-color:#cce1f4}.answer-actions{color:#8ca7bf}
.execution{border-color:#e0ecf9;background:#f9fcff;color:#7c9dbb}.execution-state{color:#7e9fbb!important}.step strong{color:#4e88b7}.step p{color:#84a3bf}.sources{border-color:#e0edf9;color:#6a92b8}.thinking{color:#6597c3}
.composer{border-color:#c6def8;box-shadow:0 3px 20px #0b7ae00b}.composer:focus-within{border-color:#5aa9f4;box-shadow:0 3px 20px #087cf015}.composer textarea{color:#284e76}.composer textarea::placeholder{color:#94afc9}.search-toggle{color:#538fbe;background:#f8fcff;border-color:#dceaf9}.send-button{background:linear-gradient(145deg,#1297ff,#0874e8);color:white}.send-button:disabled{background:#e8f2fd;color:#a0c5e9}.composer-note{color:#92acc4}
.history-heading h1{color:#07376a}.history-heading p{color:#829db9}.history-icon{background:#eaf4ff;color:#3b9aed}.history-row{border-color:#e5eef8}.history-row:hover{background:#f7fbff}.history-row strong{color:#1f5285}.history-row small{color:#8da8c2}.history-empty{color:#92a9bf}
.primary{background:linear-gradient(100deg,#048dff,#086be1);box-shadow:0 4px 10px #087ff510}.primary:hover{background:linear-gradient(100deg,#087cf0,#075bc6)}.secondary{color:#477aa8;border-color:#d4e5f7}.toast{background:#0a579b}.toast.error{background:#ad5948}dialog{border-color:#d1e6fb;color:#164a79}dialog label{color:#698caf}dialog input{border-color:#cfe1f6;background:#f8fcff}
.login-screen{padding:34px 55px 22px;background:radial-gradient(ellipse at 5% 90%,#c8ebff80,transparent 55%),linear-gradient(135deg,#fff 5%,#f0f8ff 50%,#e4f2ff 100%);align-items:center;position:relative;overflow:hidden}
.login-brand{max-width:1100px;width:100%;gap:12px}.login-brand .brand-logo{width:61px;height:61px;background:white;border:1px solid #dfedfb;border-radius:16px;padding:4px}.login-brand strong{display:block;font-size:25px;letter-spacing:1px;color:#06376a}.login-brand div>span{display:block;font-size:11px;color:#368bd1;letter-spacing:1px;margin-top:8px}
.login-layout{max-width:1100px;width:100%;display:grid;grid-template-columns:minmax(0,1fr) 390px;gap:70px;align-items:center;margin:auto;position:relative}.login-intro{padding:30px 0}.login-intro h1{font-size:43px;line-height:1.55;color:#06376a;margin:20px 0 16px;letter-spacing:1px}.login-intro em{font-style:normal;color:#0781f4}.login-intro>p{font-size:13px;color:#6a8eaf;line-height:2}.service-pills{display:flex;gap:10px;margin-top:24px}.service-pills span{color:#137dd3;font-size:11px;background:#ffffffb8;border:1px solid #c6e2fb;border-radius:6px;padding:8px 17px}
.global-visual{margin:20px 0 0;width:380px;max-width:100%;position:relative}.global-visual svg{width:100%;height:auto;stroke:#acd4f4;stroke-width:1;fill:none}.global-visual .global-route{stroke:#1b96f2;stroke-width:2;stroke-dasharray:4 4}.global-visual circle{fill:#078aff;stroke:white;stroke-width:3}.global-label{position:absolute;bottom:6px;left:80px;font-size:9px;letter-spacing:2px;color:#6da7d7}
.login-card{margin:0;max-width:390px;padding:34px 35px 36px;border-color:#d6e7f9;box-shadow:0 15px 65px #0c6ab312;border-radius:16px}.login-card h1{font-size:25px;color:#083e76;margin-top:13px}.login-card>p{color:#8ba5bd}.login-card label{color:#597e9e}.login-card input{background:#f8fbff;border-color:#d4e3f4}.login-card .primary{margin-top:18px;padding:13px 16px}.login-foot{color:#88a6c1;letter-spacing:.5px;padding-top:18px;font-size:10px}
@media(min-width:1500px){.welcome{margin-top:5vh;padding-top:34px}}
@media(max-width:1100px){.login-layout{gap:30px;grid-template-columns:minmax(0,1fr) 350px}.login-intro h1{font-size:34px}.login-card{padding:30px}.login-screen{padding:28px 35px}.brand strong{font-size:15px}.brand-logo{width:37px;height:37px}.brand div>span{font-size:8px}.welcome{margin:20px 20px 12px;padding:25px}.welcome h1{font-size:24px}.suggestions strong{font-size:12px}.suggestions small{font-size:10px}}
@media(max-width:760px){.brand-logo{width:43px;height:43px}.brand strong{font-size:17px}.brand div>span{font-size:9px}.model-badge{font-size:8px;padding:5px 6px}.welcome{margin:16px 14px 10px;padding:22px 16px;border-radius:13px}.welcome h1{font-size:22px;line-height:1.55;margin:13px 0 9px}.welcome>p{font-size:11px}.welcome-orbit{height:60px;margin-bottom:12px}.welcome-symbol{width:60px;height:60px}.welcome-symbol img{width:48px;height:48px}.welcome-tags{margin-top:12px;gap:6px}.welcome-tags span{font-size:9px;padding:4px 10px}.suggestions{grid-template-columns:1fr;margin-top:20px;gap:9px}.suggestions button{padding:14px 15px}.suggestions button>span{font-size:8px;display:block;margin:0 0 6px}.suggestions strong{font-size:12px;display:block;white-space:normal}.suggestions small{font-size:10px;margin:7px 0 0}.assistant-avatar img{width:24px;height:24px}.login-screen{padding:24px 22px;overflow:auto}.login-brand{gap:10px}.login-brand .brand-logo{width:48px;height:48px;border-radius:12px;padding:2px}.login-brand strong{font-size:21px}.login-brand div>span{font-size:9px;letter-spacing:.4px;margin-top:6px}.login-layout{display:flex;flex-direction:column;gap:0;margin:20px auto 10px;align-items:stretch;max-width:390px}.login-intro{padding:10px 3px 24px}.login-intro .eyebrow{font-size:9px;letter-spacing:1px}.login-intro h1{font-size:27px;margin:12px 0;line-height:1.5}.login-intro>p{font-size:11px;line-height:1.8;margin:0}.service-pills{margin-top:16px;gap:7px}.service-pills span{font-size:10px;padding:6px 13px}.global-visual{display:none}.login-card{width:100%;max-width:none;padding:26px}.login-card h1{font-size:23px}.login-foot{font-size:9px;padding:15px 0 0}}