body{margin:0;padding:0;font-family:Helvetica Neue,Helvetica,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Arial,sans-serif;background-color:#f0f2f5;overflow:hidden}#app-root{width:100vw;height:100vh;overflow:hidden}.landing-page{position:relative;width:100%;height:100%;background-image:url(https://images.unsplash.com/photo-1543466835-00a7907e9de1?q=80&w=1920&auto=format&fit=crop);background-size:cover;background-position:center;background-repeat:no-repeat;display:flex;align-items:center;justify-content:center}.overlay{position:absolute;top:0;left:0;right:0;bottom:0;background:#0006}.landing-content{position:relative;z-index:1;text-align:center;color:#fff;animation:fadeIn 1s ease}.main-title{font-size:4.5rem;margin:0 0 10px;font-weight:700;text-shadow:2px 2px 5px rgba(0,0,0,.6);letter-spacing:2px}.sub-title{font-size:1.5rem;margin-bottom:50px;opacity:.95;text-shadow:1px 1px 3px rgba(0,0,0,.6)}.start-btn{padding:16px 45px;font-size:1.3rem;font-weight:700;color:#fff;background:linear-gradient(135deg,#4caf50,#43a047);border:none;border-radius:50px;cursor:pointer;box-shadow:0 5px 20px #4caf5080;transition:all .3s ease}.start-btn:hover{transform:translateY(-3px);box-shadow:0 8px 25px #4caf50b3;background:linear-gradient(135deg,#4ef053,#4caf50)}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.chat-page{width:100%;height:100%;display:flex;align-items:center;justify-content:center;background-image:url(https://images.unsplash.com/photo-1548199973-03cce0bbc87b?q=80&w=1920&auto=format&fit=crop);background-size:cover;background-position:center}.chat-container{width:85%;max-width:1100px;height:85vh;background:#fffffff2;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-radius:20px;box-shadow:0 15px 40px #00000040;display:flex;flex-direction:column;overflow:hidden;border:1px solid rgba(255,255,255,.6)}.header{padding:20px 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#4caf504d}.send-btn:disabled{background:#a5d6a7;cursor:not-allowed;transform:none;box-shadow:none}n .markdown-body{font-size:1.05rem;line-height:1.6}.markdown-body p{margin-top:0;margin-bottom:.8em}.markdown-body p:last-child{margin-bottom:0}.markdown-body h1,.markdown-body h2,.markdown-body h3,.markdown-body h4{margin-top:1.2em;margin-bottom:.6em;font-weight:700;border-bottom:1px solid rgba(0,0,0,.1);padding-bottom:.3em}.markdown-body ul,.markdown-body ol{padding-left:1.5em;margin-bottom:.8em}.markdown-body li{margin-bottom:.3em}.markdown-body strong{font-weight:600;color:#d32f2f}.markdown-body table{border-collapse:collapse;width:100%;margin-bottom:1em}.markdown-body th,.markdown-body td{border:1px solid #ddd;padding:8px 12px;text-align:left}.markdown-body th{background-color:#f6f8fa;font-weight:600}.markdown-body tr:nth-child(2n){background-color:#fafbfc}.markdown-body code{background:#0000000d;padding:.2em .4em;border-radius:3px;font-family:monospace;font-size:.9em}