:root{--bg:#f5f7fb;--surface:#fff;--surface-2:#f8fafc;--line:#dbe3ee;--text:#1f2937;--muted:#6b7280;--pri:#2457d6;--pri-2:#1d4ed8;--shadow:0 10px 30px rgba(15,23,42,.06);--radius:18px;}
*{box-sizing:border-box}html,body{margin:0;padding:0}body{font-family:PingFang SC,Microsoft YaHei,system-ui,sans-serif;background:linear-gradient(180deg,#f7f9fc 0%,var(--bg) 100%);color:var(--text)}
a{color:var(--pri);text-decoration:none}button,input,select,textarea{font:inherit}
.page{max-width:1160px;margin:0 auto;padding:24px}.workspace{display:grid;grid-template-columns:300px 1fr;gap:18px;align-items:start}.intro-card,.panel,.card,.auth-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.workbench-top{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:0 0 16px;margin-bottom:18px}.workbench-top h1{margin:8px 0 4px;font-size:28px}.workbench-top p{margin:0;color:var(--muted)}.workbench-home,.landing-link,.landing-cta,.landing-secondary{background:linear-gradient(180deg,var(--pri),var(--pri-2));color:#fff;border:none;border-radius:12px;padding:10px 14px;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;min-height:42px;box-shadow:0 6px 14px rgba(36,87,214,.16)}.landing-secondary{background:#eef4ff;color:var(--pri);box-shadow:none}
.intro-card{padding:22px;position:sticky;top:24px}.intro-card h1{margin:10px 0 10px;font-size:30px;letter-spacing:.2px}.intro-card p{margin:0;color:var(--muted);line-height:1.8;font-size:15px}.intro-note{margin-top:14px;padding-top:14px;border-top:1px solid var(--line);color:var(--muted);font-size:13px;line-height:1.7}
.link-btn,button{background:linear-gradient(180deg,var(--pri),var(--pri-2));color:#fff;border:none;border-radius:12px;padding:10px 14px;cursor:pointer;transition:transform .15s ease,box-shadow .15s ease;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;min-height:42px;box-shadow:0 6px 14px rgba(36,87,214,.16)}.link-btn:hover,button:hover,.landing-link:hover,.landing-cta:hover,.landing-secondary:hover,.workbench-home:hover{transform:translateY(-1px)}
.panel{padding:18px 18px 20px}.toolbar{display:flex;justify-content:space-between;align-items:end;gap:12px;margin-bottom:12px;flex-wrap:wrap}.toolbar-compact{display:none}.toolbar-note{color:var(--muted);font-size:12px;white-space:nowrap}
select,textarea,input{width:100%;border:1px solid var(--line);border-radius:12px;padding:11px 12px;background:var(--surface-2);color:var(--text);outline:none;transition:border-color .15s ease,box-shadow .15s ease}select:focus,textarea:focus,input:focus{border-color:#b7c8ff;box-shadow:0 0 0 3px rgba(36,87,214,.12)}
.toolbar>div{min-width:240px;flex:1}.chips{display:none}.chip{background:#eef4ff;color:#234ea0;border:1px solid #d6e4ff;box-shadow:none}
.chat-log{min-height:560px;max-height:calc(100vh - 240px);overflow:auto;border:1px solid var(--line);border-radius:16px;background:#fafbfd;padding:14px}.msg{display:flex;gap:12px;margin:0 0 12px}.msg.user{justify-content:flex-end}.msg.user .role{order:2}
.bubble{max-width:min(760px,80%);padding:12px 14px;border-radius:16px;background:#fff;border:1px solid var(--line);line-height:1.7;white-space:normal}.msg.user .bubble{background:#eaf1ff;border-color:#d7e4ff}.role{font-size:12px;color:var(--muted);padding-top:4px}
.composer{margin-top:14px}.composer textarea{min-height:96px;resize:vertical}.actions{display:flex;justify-content:flex-end;margin-top:10px}.muted{color:var(--muted);font-size:13px;line-height:1.6}
.landing-page{max-width:1160px;margin:0 auto;padding:24px}.landing-nav{display:flex;justify-content:space-between;align-items:center;gap:18px;padding:10px 2px 22px}.landing-nav nav{display:flex;gap:20px;flex-wrap:wrap}.landing-nav nav a{color:var(--muted)}.brand-mini{display:flex;align-items:center;gap:14px}.brand-mini strong{font-size:18px}
.landing-hero{display:flex;justify-content:space-between;align-items:stretch;gap:18px;background:var(--surface);border:1px solid var(--line);border-radius:24px;padding:24px 26px;box-shadow:var(--shadow);margin-bottom:18px}.landing-brand h1{margin:10px 0 10px;font-size:38px}.landing-brand p{margin:0;color:var(--muted);font-size:15px;line-height:1.7;max-width:680px}.landing-hero-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.landing-panel{min-width:280px;background:#f8fbff;border:1px solid var(--line);border-radius:20px;padding:18px;display:grid;gap:12px}.landing-panel-title{font-weight:700;color:var(--text);margin-bottom:4px}.landing-panel-item{display:flex;justify-content:space-between;gap:12px;color:var(--muted);font-size:13px;padding-bottom:10px;border-bottom:1px solid var(--line)}.landing-panel-item:last-child{padding-bottom:0;border-bottom:0}.landing-panel-item strong{color:var(--text)}
.landing-main{display:grid;gap:18px}.landing-focus,.landing-grid,.landing-card,.landing-feature,.landing-footer-card{background:var(--surface);border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow)}
.landing-focus{display:flex;justify-content:space-between;gap:18px;align-items:center;padding:24px 26px}.landing-focus h2{margin:0 0 8px;font-size:24px}.landing-focus p{margin:0;color:var(--text);line-height:1.8;max-width:640px}.landing-actions{display:grid;justify-items:end;gap:10px}.landing-note{color:var(--muted);font-size:13px}
.landing-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;padding:16px}.landing-card{padding:20px}.landing-card h3{margin:0 0 8px;font-size:18px}.landing-card p{margin:0;color:var(--muted);line-height:1.7}
.landing-feature{display:flex;justify-content:space-between;gap:18px;align-items:center;padding:24px 26px}.landing-feature h2{margin:0 0 10px;font-size:24px}.landing-feature p{margin:0;color:var(--muted);line-height:1.8;max-width:680px}.landing-feature-list{display:grid;gap:10px;min-width:240px}.landing-feature-list div{display:flex;align-items:center;gap:10px;color:var(--text)}.landing-feature-list span{color:var(--pri);font-weight:700}
.landing-footer-card{display:flex;justify-content:space-between;gap:18px;align-items:center;padding:22px 26px}.landing-footer-card h3{margin:0 0 8px;font-size:22px}.landing-footer-card p{margin:0;color:var(--muted)}
.landing-footer{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;color:var(--muted);font-size:13px;padding:8px 4px 0}
.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.grid .row{grid-column:1/-1;display:flex;gap:10px;flex-wrap:wrap}.card{padding:20px;margin-bottom:16px}.card h2{margin:0 0 14px;font-size:20px}.card h2:before{content:'';display:inline-block;width:4px;height:18px;border-radius:999px;background:var(--pri);margin-right:10px;vertical-align:-3px}
.row-item{display:flex;justify-content:space-between;align-items:center;gap:14px;padding:14px 0;border-top:1px solid var(--line)}.row-item:first-child{border-top:0}.ops{display:flex;gap:8px;flex-wrap:wrap}.ops button{padding:8px 10px;min-height:36px}.auth-card{max-width:420px;margin:64px auto;padding:24px}.auth-card form{display:grid;gap:12px}.auth-card label{display:grid;gap:6px}.top-links{display:flex;gap:10px;flex-wrap:wrap}
@media (max-width: 980px){.workspace,.landing-hero,.landing-focus,.landing-feature,.landing-footer-card{grid-template-columns:1fr;display:grid}.intro-card{position:relative;top:auto}.landing-panel{min-width:0}.landing-grid{grid-template-columns:1fr}.landing-nav{display:grid;justify-content:stretch}.landing-nav nav{justify-content:flex-start}.landing-nav .landing-link{justify-self:start}}
@media (max-width: 720px){.main{padding:14px}.hero{padding:18px;flex-direction:column;align-items:flex-start}.grid,.cards,.settings-grid{grid-template-columns:1fr}.hero-actions{width:100%}.hero-actions a{flex:1}.landing-page,.page{padding:14px}.landing-brand h1{font-size:30px}.landing-hero,.landing-focus,.landing-feature,.landing-footer-card{padding:18px}.landing-panel{padding:16px}.landing-footer-card,.landing-focus,.landing-feature{display:grid}}