:root{--bg: #f5f3ec;--bg-accent: #e7ecdf;--card: rgba(255, 255, 255, .86);--text: #1f2421;--muted: #5f6a63;--line: #d6dbce;--brand: #d16642;--brand-strong: #b54f2e;--user-bubble: #e6f2dc;--ai-bubble: #f6ede0;--shadow: 0 18px 40px rgba(70, 54, 30, .12)}*{box-sizing:border-box}body{margin:0;font-family:Manrope,PingFang SC,Microsoft YaHei,sans-serif;color:var(--text);background:radial-gradient(circle at 18% 20%,rgba(209,102,66,.16),transparent 40%),radial-gradient(circle at 85% 12%,rgba(79,121,95,.18),transparent 34%),linear-gradient(140deg,var(--bg),var(--bg-accent));min-height:100vh}h1,h2,h3{font-family:Space Grotesk,PingFang SC,sans-serif;margin:0}p{margin:0}.app-shell{min-height:100vh;padding:28px}.card{background:var(--card);border:1px solid rgba(255,255,255,.7);border-radius:20px;box-shadow:var(--shadow);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}.top-nav{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:18px}.nav-link{text-decoration:none;color:var(--text);border:1px solid var(--line);padding:8px 14px;border-radius:999px;font-weight:600;transition:transform .2s ease,background .2s ease}.nav-link:hover{background:#fff;transform:translateY(-1px)}.page-wrap{max-width:1280px;margin:0 auto}.home-page{max-width:1120px;margin:0 auto;min-height:calc(100vh - 56px);display:flex;flex-direction:column;justify-content:center}.home-top{display:flex;justify-content:space-between;align-items:center;gap:14px;margin-bottom:28px}.home-actions{display:flex;gap:10px}.home-top h1{font-size:clamp(30px,4vw,42px);color:#eef6ff;text-shadow:0 4px 22px rgba(64,173,255,.35)}.profile-entry{text-decoration:none;color:#dff2ff;border:1px solid rgba(105,194,255,.5);background:rgba(16,44,78,.55);padding:10px 16px;border-radius:999px;font-weight:700;cursor:pointer}.profile-entry.ghost{background:rgba(20,35,58,.42)}.profile-entry:hover{background:rgba(30,78,131,.66)}.hero{padding:34px;margin-bottom:20px;animation:rise .6s ease}.hero-kicker{color:#8fcfff;text-transform:uppercase;letter-spacing:1.4px;font-size:12px;font-weight:800;margin-bottom:8px}.hero h1{font-size:clamp(28px,4vw,44px);margin-bottom:10px}.hero p{color:var(--muted)}.app-grid{display:grid;gap:24px;grid-template-columns:repeat(2,minmax(290px,1fr));width:100%;justify-content:center}.app-card{text-decoration:none;color:#f7fbff;border-radius:22px;padding:34px 30px;border:1px solid rgba(75,156,220,.38);background:radial-gradient(circle at 50% 0%,rgba(55,196,255,.2),transparent 44%),linear-gradient(160deg,#112445,#121936 52%,#11172e);box-shadow:inset 0 0 18px #1fa9ff14,0 0 36px #1896fa38,0 20px 36px #070e218c;transition:transform .22s ease,box-shadow .22s ease;animation:rise .7s ease both;display:grid;justify-items:center;text-align:center;min-height:510px}.app-card:hover{transform:translateY(-6px);box-shadow:inset 0 0 22px #1fc0ff2e,0 0 42px #2bb0ff57,0 24px 44px #060d209e}.app-card h2{margin-bottom:12px;font-size:clamp(32px,3.5vw,42px);letter-spacing:.6px}.app-card p{color:#dceeffdb;line-height:1.5;font-size:30px;margin-bottom:22px}.cover-icon{width:156px;height:156px;object-fit:contain;margin-bottom:20px;filter:drop-shadow(0 0 18px rgba(77,190,255,.48))}.cta{display:inline-flex;align-items:center;justify-content:center;min-width:210px;padding:14px 24px;border-radius:999px;background:linear-gradient(90deg,#138cff,#25c5ff);color:#eaffff;font-size:30px;font-weight:700;box-shadow:0 12px 24px #0a8ee16b}.chat-layout{display:grid;grid-template-columns:320px 1fr;gap:16px;min-height:calc(100vh - 140px)}.chat-sidebar,.chat-main{padding:18px}.chat-sidebar{display:flex;flex-direction:column;gap:10px}.field-label{font-size:12px;color:var(--muted);margin-top:4px}.input,.textarea{width:100%;border:1px solid var(--line);border-radius:12px;padding:10px 12px;font-size:14px;font-family:inherit;background:rgba(255,255,255,.95)}.textarea{min-height:88px;resize:vertical}.readonly-value{border:1px solid var(--line);border-radius:12px;padding:10px 12px;background:rgba(255,255,255,.92);min-height:42px;display:flex;align-items:center;color:#26302a}.meta{color:var(--muted);font-size:12px}.btn{border:1px solid var(--line);border-radius:12px;padding:10px 14px;background:#fff;font-weight:700;cursor:pointer}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--brand);color:#fff;border-color:transparent}.btn-primary:hover:not(:disabled){background:var(--brand-strong)}.session-list{display:flex;flex-direction:column;gap:8px;max-height:42vh;overflow:auto;padding-right:4px}.session-item{text-align:left;border:1px solid var(--line);border-radius:10px;background:#fff;padding:8px 10px;cursor:pointer;display:flex;flex-direction:column;gap:4px}.session-item small{color:var(--muted);font-size:11px}.session-item.active{border-color:var(--brand);background:#fff7f3}.tip{color:var(--muted);font-size:13px;line-height:1.4}.chat-main{display:grid;grid-template-rows:auto 1fr auto;gap:12px}.chat-main-header{border-bottom:1px solid var(--line);padding-bottom:10px}.messages{overflow:auto;display:flex;flex-direction:column;gap:10px;padding:6px 2px}.message-row{display:flex}.message-row.user{justify-content:flex-end}.message-row.assistant{justify-content:flex-start}.bubble{max-width:min(68%,760px);border-radius:14px;border:1px solid rgba(0,0,0,.04);padding:10px 12px;line-height:1.5;white-space:pre-wrap}.message-row.user .bubble{background:var(--user-bubble)}.message-row.assistant .bubble{background:var(--ai-bubble)}.empty{color:var(--muted);margin-top:30px;text-align:center}.composer{display:flex;flex-direction:column;gap:10px}.composer-actions{display:flex;justify-content:flex-end;gap:10px}.profile-page{max-width:1100px;margin:0 auto}.profile-grid{display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}.profile-card{padding:22px;display:flex;flex-direction:column;gap:10px}.avatar-block{display:flex;align-items:center;gap:14px;margin:4px 0 10px}.avatar{width:62px;height:62px;border-radius:50%;object-fit:cover;border:2px solid #fff;box-shadow:0 6px 20px #00000029}.login-page{min-height:calc(100vh - 56px);display:grid;place-items:center}.login-card{width:min(460px,100%);padding:28px;display:flex;flex-direction:column;gap:10px}.login-card h1{font-size:34px;margin-bottom:4px}.error-tip{color:#b32222;font-size:14px}.success-tip{color:#1f7a3a;font-size:14px}.auth-links{display:flex;gap:10px;flex-wrap:wrap}@keyframes rise{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}@media (max-width: 960px){.app-shell{padding:14px}.home-top{flex-direction:column;align-items:flex-start}.home-actions{width:100%}.home-page{min-height:auto;justify-content:flex-start}.app-grid{grid-template-columns:1fr}.app-card{min-height:400px;padding:26px 20px}.cover-icon{width:120px;height:120px}.app-card h2{font-size:clamp(28px,8vw,36px)}.app-card p,.cta{font-size:clamp(18px,4.8vw,24px)}.chat-layout{grid-template-columns:1fr;min-height:auto}.chat-sidebar{order:2}.chat-main{min-height:70vh}.bubble{max-width:86%}}