*{box-sizing:border-box}body{margin:0;background:#f5f7fb;color:#172033;font-family:Arial,Microsoft YaHei,sans-serif}.shell{display:flex;min-height:100vh}.sidebar{width:236px;background:#101828;color:#d6deeb;padding:24px 16px;display:flex;flex-direction:column}.brand{display:flex;align-items:center;gap:10px;padding:6px 10px 34px}.brand-mark{width:34px;height:34px;border-radius:8px;background:#3b82f6;color:#fff;display:grid;place-items:center;font-weight:700}.brand span,.brand strong{display:block}.brand strong{color:#fff;font-size:15px}.brand span{font-size:12px;color:#8290a8;margin-top:3px}.sidebar nav{display:grid;grid-gap:6px;gap:6px}.sidebar nav a{display:flex;align-items:center;gap:11px;color:#aebbd0;text-decoration:none;padding:11px 12px;border-radius:7px;font-size:14px}.sidebar nav a:hover{background:#1c2a40;color:#fff}.side-foot{margin-top:auto;border-top:1px solid #25344d;padding:16px 10px;display:flex;align-items:center;gap:8px;color:#8796ad;font-size:12px}.side-foot b{margin-left:auto;color:#fff}.content{flex:1 1;padding:38px 48px;max-width:1280px}.topbar{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:30px}.eyebrow{font-size:11px;letter-spacing:.12em;color:#6b7a90;margin:0 0 10px}.topbar h1{font-size:30px;letter-spacing:-.02em;margin:0 0 8px}.muted{color:#708096;font-size:14px}.user-chip{display:flex;align-items:center;gap:8px;font-size:13px}.avatar{background:#dbeafe;color:#2563eb;border-radius:50%;width:30px;height:30px;display:grid;place-items:center;font-weight:700}.hero{background:#175cd3;color:#fff;border-radius:10px;padding:30px 34px;display:flex;justify-content:space-between;align-items:center;margin-bottom:38px}.hero h2{font-size:25px;margin:0 0 10px}.hero p{color:#d8e7ff}.light{color:#bcd5ff}.hero-stat{min-width:190px;border-left:1px solid #4b88e8;padding-left:28px}.hero-stat small,.hero-stat span{display:block;color:#c5dbff;font-size:12px}.hero-stat strong{display:block;font-size:38px;margin:7px 0}.filter,.icon-btn,.primary,.secondary{border:0;border-radius:6px;cursor:pointer;font-weight:600;display:inline-flex;align-items:center;gap:7px}.primary{background:#fff;color:#1556bd;padding:11px 15px;text-decoration:none;font-size:13px}.topbar .primary{background:#175cd3;color:#fff}.secondary{background:#edf2f8;color:#2b3b52;padding:9px 12px}.section-head{display:flex;justify-content:space-between;align-items:center;margin:28px 0 14px}.section-head h2{font-size:19px;margin:0}.text-link{color:#2563eb;text-decoration:none;font-size:13px}.quick-grid{display:grid;grid-template-columns:repeat(4,1fr);grid-gap:14px;gap:14px}.quick{background:#fff;border:1px solid #e6ebf2;border-radius:8px;padding:18px;display:flex;align-items:flex-start;gap:12px;text-decoration:none;color:inherit}.quick>svg{margin-left:auto;color:#99a7bb}.product-icon,.quick-icon{width:36px;height:36px;background:#eff6ff;color:#2563eb;border-radius:8px;display:grid;place-items:center;flex:none}.product h3,.quick h3{font-size:15px;margin:1px 0 6px}.product p,.quick p{font-size:12px;color:#728197;line-height:1.5;margin:0}.table-wrap{background:#fff;border:1px solid #e6ebf2;border-radius:8px;overflow:hidden}table{width:100%;border-collapse:collapse;font-size:13px}td,th{text-align:left;padding:14px 18px;border-bottom:1px solid #edf0f4}th{color:#8190a3;font-size:11px;font-weight:600}.empty{text-align:center;color:#8693a5;padding:30px}.status{font-size:11px;padding:4px 7px;border-radius:5px;background:#e9f8ef;color:#21864a}.search{display:flex;align-items:center;gap:8px;background:#fff;border:1px solid #e1e7ef;border-radius:7px;padding:10px 12px;width:260px;color:#8290a2}.search input{border:0;outline:0;width:100%;font-size:13px}.filter-row{display:flex;gap:8px;margin-bottom:20px}.filter{background:transparent;color:#708096;padding:8px 13px}.filter.active{background:#e8f0ff;color:#2563eb}.product-grid{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:16px;gap:16px}.product{background:#fff;border:1px solid #e4eaf2;border-radius:8px;padding:20px}.product .tag{display:inline-block;margin-top:16px;color:#2563eb;background:#eff6ff;border-radius:4px;padding:4px 7px;font-size:10px}.product h3{font-size:17px;margin-top:12px}.product-foot{display:flex;justify-content:space-between;align-items:center;border-top:1px solid #edf0f4;margin-top:20px;padding-top:14px;font-size:12px;color:#708096}.product-foot b{color:#172033}.icon-btn{width:32px;height:32px;background:#edf4ff;color:#2563eb;justify-content:center}.modal-backdrop{position:fixed;inset:0;background:#0b122080;display:grid;place-items:center;padding:20px}.modal{background:#fff;width:min(440px,100%);border-radius:10px;padding:26px;position:relative}.close{position:absolute;right:16px;top:12px;border:0;background:none;font-size:25px;color:#8793a4;cursor:pointer}.modal h2{margin:16px 0 7px}.modal label{display:block;font-size:12px;font-weight:600;margin:20px 0 8px}.modal textarea{width:100%;height:110px;border:1px solid #dce3ec;border-radius:6px;padding:10px;resize:vertical;font:inherit;font-size:13px}.cost-line{display:flex;justify-content:space-between;padding:14px 0;font-size:13px}.full{width:100%;justify-content:center;background:#175cd3;color:#fff}.balance-card{background:#fff;border:1px solid #e4eaf2;border-radius:8px;padding:24px;max-width:340px}.balance-card small,.balance-card span{display:block;color:#7b899c;font-size:12px}.balance-card strong{font-size:42px;display:inline-block;margin:10px 5px 0 0}.income{color:#1f9d55}.expense{color:#e05252}.admin-grid{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:16px;gap:16px}.admin-card{background:#fff;border:1px solid #e4eaf2;border-radius:8px;padding:22px}.admin-card>svg{color:#2563eb}.admin-card h3{margin:18px 0 8px}.admin-card p{color:#708096;font-size:13px;line-height:1.6;min-height:42px}.notice{background:#eaf3ff;color:#1556bd;padding:12px 15px;border-radius:7px;margin-bottom:20px;font-size:13px}@media(max-width:900px){.sidebar{width:190px}.content{padding:28px}.admin-grid,.product-grid,.quick-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:640px){.sidebar{display:none}.content{padding:22px 16px}.topbar{display:block}.search{width:100%;margin-top:18px}.hero{display:block}.hero-stat{border:0;padding:18px 0 0;margin-top:20px}.admin-grid,.product-grid,.quick-grid{grid-template-columns:1fr}}.chat-layout{display:flex;min-height:calc(100vh - 76px);margin:-38px -48px}.history-panel{width:280px;background:#fff;border-right:1px solid #e4eaf2;padding:24px 16px}.back-link{gap:7px;color:#607089;text-decoration:none;font-size:13px;margin-bottom:24px}.back-link,.chat-title{display:flex;align-items:center}.chat-title{gap:10px;padding:10px 4px 20px;border-bottom:1px solid #edf0f4}.chat-title span,.chat-title strong{display:block}.chat-title strong{font-size:14px}.chat-title span{font-size:11px;color:#7c8a9d;margin-top:4px}.new-chat{width:100%;display:flex;align-items:center;justify-content:center;gap:7px;margin:18px 0;padding:10px;border:1px solid #cfe0ff;background:#eff6ff;color:#2563eb;border-radius:6px;font-weight:600;cursor:pointer}.history-label{font-size:11px;color:#94a0b1;margin:20px 6px 8px}.history-item{width:100%;display:flex;align-items:center;gap:8px;border:0;background:transparent;padding:10px 8px;border-radius:6px;color:#5f6f84;text-align:left;cursor:pointer;font-size:12px}.history-item span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1 1}.history-item.selected,.history-item:hover{background:#eef4ff;color:#2563eb}.chat-main{flex:1 1;display:flex;flex-direction:column;background:#f8fafc}.chat-header{background:#fff;border-bottom:1px solid #e4eaf2;padding:28px 38px;display:flex;justify-content:space-between;align-items:flex-start}.chat-header h1{font-size:24px;margin:0 0 7px}.credit-pill{font-size:11px;color:#2563eb;background:#eff6ff;padding:7px 10px;border-radius:5px}.messages{flex:1 1;overflow:auto;padding:34px max(7vw,30px)}.welcome{text-align:center;margin:auto;max-width:520px;padding-top:8vh}.welcome-icon{margin:0 auto 18px;width:46px;height:46px;border-radius:12px;background:#e8f0ff;color:#2563eb;display:grid;place-items:center}.welcome h2{font-size:21px;margin:0 0 10px}.welcome p{color:#7a899d;font-size:13px}.suggestions{display:flex;justify-content:center;gap:8px;margin-top:24px}.suggestions button{border:1px solid #dce5f0;background:#fff;padding:9px 12px;border-radius:6px;color:#5d6d82;font-size:12px;cursor:pointer}.message{display:flex;gap:10px;margin-bottom:22px;max-width:780px}.message.user{margin-left:auto;flex-direction:row-reverse}.message-avatar{width:28px;height:28px;border-radius:50%;background:#e7efff;color:#2563eb;display:grid;place-items:center;font-size:11px;font-weight:700;flex:none}.message.user .message-avatar{background:#172033;color:#fff}.bubble{background:#fff;border:1px solid #e3e9f1;padding:12px 15px;border-radius:8px;font-size:14px;line-height:1.7;color:#344258}.message.user .bubble{background:#2563eb;color:#fff;border-color:#2563eb}.composer{background:#fff;border-top:1px solid #e4eaf2;padding:18px 30px;display:flex;gap:10px}.composer textarea{flex:1 1;min-height:58px;max-height:140px;border:1px solid #dce3ec;border-radius:7px;padding:12px;resize:vertical;font:inherit;font-size:13px;outline:none}.send-btn{width:44px;height:44px;align-self:flex-end;border:0;border-radius:7px;background:#2563eb;color:#fff;display:grid;place-items:center;cursor:pointer}.form-input{width:100%;border:1px solid #dce3ec;border-radius:6px;padding:10px;font:inherit;font-size:13px;background:#fff}.form-row{display:flex;gap:8px}.chat-error{color:#c33;background:#fff0f0;padding:10px 30px;font-size:12px}.auth-page{min-height:100vh;display:grid;place-items:center;background:#f5f7fb;padding:20px}.auth-card{width:min(410px,100%);background:#fff;border:1px solid #e4eaf2;border-radius:10px;padding:34px}.brand-mark.large{width:44px;height:44px;margin-bottom:22px}.auth-card h1{font-size:25px;margin:0 0 8px}.auth-card form{margin-top:24px}.auth-card label{display:block;font-size:12px;font-weight:600;margin:16px 0 7px}.auth-input{display:flex;align-items:center;gap:8px;border:1px solid #dce3ec;border-radius:6px;padding:10px 11px;color:#8290a2}.auth-input input{border:0;outline:0;flex:1 1;font:inherit;font-size:13px}.auth-note{font-size:11px;color:#98a4b4;text-align:center;margin:18px 0 0}.logout{display:flex;align-items:center;gap:8px;color:#94a2b7;padding:14px 10px}.auth-switch,.logout{border:0;background:none;font-size:12px;cursor:pointer}.auth-switch{color:#2563eb;display:block;margin:16px auto 0}