:root{font-family:Inter,PingFang SC,Microsoft YaHei,ui-sans-serif,system-ui,sans-serif;color:#172033;background:#f5f8ff}*{box-sizing:border-box}body{margin:0;min-width:320px}.page-shell{min-height:100vh;padding:48px 24px;background:radial-gradient(circle at 15% 0%,#e5efff 0,transparent 38%),#f5f8ff}header,.chat-card{width:min(900px,100%);margin:0 auto}header{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px}h1{margin:6px 0 0;font-size:clamp(28px,5vw,44px);letter-spacing:-.04em}.eyebrow{color:#2563eb;font-weight:700;letter-spacing:.08em}.chat-card{min-height:680px;display:flex;flex-direction:column;padding:24px 28px 20px;border:1px solid #dce6f7;border-radius:24px;background:#fffffff0;box-shadow:0 20px 60px #34568c1f}.message-list{flex:1;overflow:auto;padding:20px 10px 24px 0;scrollbar-color:#cbd5e1 transparent}.composer{margin-top:auto}.composer .ant-space-item:first-child{width:100%}@media(max-width:640px){.page-shell{padding:24px 14px}header{align-items:flex-start;gap:12px;flex-direction:column}.chat-card{padding:16px;min-height:calc(100vh - 160px)}}.toolbar{margin-bottom:12px}.notice{margin-top:16px}.welcome{padding:28px 0;flex:1}.welcome-card{display:flex;align-items:flex-start;gap:16px;padding:24px;border:1px solid #dbe7ff;border-radius:18px;background:linear-gradient(135deg,#f2f7ff,#fff 80%);box-shadow:inset 0 1px #ffffffe6}.welcome-icon{display:grid;width:42px;height:42px;flex:0 0 42px;place-items:center;border-radius:13px;color:#fff;background:linear-gradient(135deg,#2563eb,#60a5fa);box-shadow:0 8px 18px #2563eb38;font-size:22px}.welcome-card h2{margin:1px 0 8px;color:#172b4d;font-size:19px}.welcome-card p{margin:0;color:#64748b;line-height:1.7}.welcome .ant-space{margin-top:24px}.welcome .ant-btn{border-color:#cbdcfb;color:#2458b8;background:#f8fbff}.welcome .ant-btn:hover{border-color:#2563eb;color:#1d4ed8;background:#eff6ff}.notice{border-radius:14px}.message-list{max-height:58vh;min-height:260px}.message{margin-bottom:26px}.message-row{display:flex;align-items:flex-start;gap:10px}.message-main{min-width:0;flex:1}.user-row{justify-content:flex-end}.user-row .message-main{flex:0 1 auto;max-width:78%}.role-avatar{display:grid;width:32px;height:32px;flex:0 0 32px;place-items:center;margin-top:24px;border-radius:50%;font-size:14px;font-weight:700;-webkit-user-select:none;user-select:none}.user-row .role-avatar{margin-top:0}.ai-avatar{color:#fff;background:linear-gradient(135deg,#2563eb,#60a5fa);box-shadow:0 5px 12px #2563eb38}.user-avatar{color:#fff;background:linear-gradient(135deg,#f59e0b,#fb923c);box-shadow:0 5px 12px #f59e0b33}.message.user .ant-bubble-content{background:#2563eb;color:#fff;border-radius:17px 17px 5px;box-shadow:0 5px 15px #2563eb29}.message.assistant .ant-bubble-content{background:#e8edf4;color:#334155;border:1px solid #d8e0eb;border-radius:5px 17px 17px;box-shadow:0 4px 14px #23375a0a}.message.assistant .markdown-body{font-weight:400}.assistant-mark{display:flex;align-items:center;gap:7px;margin:0 0 7px 4px;color:#64748b;font-size:12px;font-weight:600}.assistant-mark span{color:#64748b;font-weight:500}.message-content{white-space:normal;overflow-wrap:anywhere;line-height:1.65;letter-spacing:.005em}.message-content strong{color:inherit;font-weight:750}.message-content p{margin:0 0 10px}.message-content h2,.message-content h3,.message-content h4{margin:4px 0 10px;line-height:1.4}.message-content ul{margin:5px 0 12px;padding-left:20px}.message-content ol{margin:5px 0 12px;padding-left:22px}.message-content li{margin:4px 0;padding-left:2px;line-height:1.6}.message-content li+li{margin-top:5px}.message-content code{padding:2px 5px;border-radius:5px;background:#e9eef7;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.9em}.message-content .md-code{margin:9px 0;padding:10px;overflow-x:auto;border-radius:8px;background:#172033;color:#e7efff;white-space:pre-wrap}.tool-panel{margin-top:12px}.tool-panel pre{white-space:pre-wrap;overflow-wrap:anywhere;margin:8px 0 16px}.metrics{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:12px;color:#64748b;margin:10px 4px 0;line-height:1.8}.metrics details{color:#94a3b8}.metrics summary{cursor:pointer}.tool-panel{border-color:#e8edf5!important;background:#fffdf6}.composer{width:100%}.message-content{--paragraph-gap: 10px;--list-gap: 4px;font-size:14px}.message-content.plain-text{white-space:pre-wrap}.markdown-body p{margin:0 0 var(--paragraph-gap)}.markdown-body ul,.markdown-body ol{margin:0 0 var(--paragraph-gap);padding-left:22px}.markdown-body li,.markdown-body li+li{margin:var(--list-gap) 0;line-height:inherit}.markdown-body li>p{margin:0}.markdown-body li>ul,.markdown-body li>ol{margin:var(--list-gap) 0 0}.markdown-body>:first-child{margin-top:0}.markdown-body>:last-child{margin-bottom:0}.markdown-body pre{margin:10px 0;padding:12px;overflow-x:auto;background:#172033;color:#e7efff;border-radius:8px;line-height:1.5;white-space:pre}.markdown-body pre code{padding:0;background:transparent;color:inherit}.markdown-body blockquote{margin:10px 0;padding-left:12px;border-left:3px solid #cbdcfb;color:#64748b}.markdown-body table{display:block;max-width:100%;overflow-x:auto;border-collapse:collapse;margin:10px 0}.markdown-body th,.markdown-body td{border:1px solid #e4eaf4;padding:6px 10px}