/* ====== 全局重置 ====== */
*{margin:0;padding:0;box-sizing:border-box;}
:root{
    --primary:#6366f1;
    --primary-light:#818cf8;
    --primary-dark:#4f46e5;
    --bg:#f1f5f9;
    --surface:#ffffff;
    --text:#1e293b;
    --text-secondary:#64748b;
    --text-muted:#94a3b8;
    --border:#e2e8f0;
    --border-light:#f1f5f9;
    --success:#10b981;
    --warning:#f59e0b;
    --error:#ef4444;
    --shadow-sm:0 1px 2px rgba(0,0,0,0.05);
    --shadow:0 1px 3px rgba(0,0,0,0.1),0 1px 2px rgba(0,0,0,0.06);
    --shadow-md:0 4px 6px -1px rgba(0,0,0,0.1),0 2px 4px -2px rgba(0,0,0,0.1);
    --shadow-lg:0 10px 15px -3px rgba(0,0,0,0.1),0 4px 6px -4px rgba(0,0,0,0.1);
    --radius:12px;
    --radius-sm:8px;
}
html,body{height:100%;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;}
body{background:var(--bg);color:var(--text);font-size:14px;line-height:1.6;}

/* ====== 布局 ====== */
#app{display:flex;flex-direction:column;height:100vh;overflow:hidden;}

/* ====== 顶部导航 ====== */
.header{display:flex;align-items:center;justify-content:space-between;padding:0 24px;height:56px;background:var(--surface);border-bottom:1px solid var(--border);box-shadow:var(--shadow-sm);z-index:100;flex-shrink:0;}
.logo{display:flex;align-items:center;gap:10px;}
.logo-text{font-size:18px;font-weight:700;color:var(--text);}
.header-right{display:flex;align-items:center;gap:12px;}

/* ====== 按钮 ====== */
.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border:none;border-radius:var(--radius-sm);font-size:14px;font-weight:600;cursor:pointer;transition:all .15s ease;white-space:nowrap;}
.btn:disabled{opacity:.5;cursor:not-allowed;}
.btn-primary{background:var(--primary);color:#fff;}
.btn-primary:hover:not(:disabled){background:var(--primary-dark);}
.btn-secondary{background:#e0e7ff;color:var(--primary-dark);}
.btn-secondary:hover:not(:disabled){background:#c7d2fe;}
.btn-ghost{background:transparent;color:var(--text-secondary);border:1px solid var(--border);}
.btn-ghost:hover:not(:disabled){background:var(--border-light);color:var(--text);}
.btn-outline{background:transparent;color:var(--primary);border:1.5px solid var(--primary);}
.btn-outline:hover:not(:disabled){background:var(--primary);color:#fff;}
.btn-block{width:100%;justify-content:center;padding:12px;}
.btn-icon{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface);color:var(--text-secondary);font-size:13px;font-weight:500;cursor:pointer;transition:all .15s;}
.btn-icon:hover{border-color:var(--primary);color:var(--primary);background:#eef2ff;}
.btn-icon-sm{display:inline-flex;align-items:center;gap:4px;padding:4px 10px;border:1px solid var(--border);border-radius:6px;background:var(--surface);color:var(--text-secondary);font-size:12px;cursor:pointer;transition:all .15s;}
.btn-icon-sm:hover{border-color:var(--primary);color:var(--primary);}
.btn-icon-close{background:none;border:none;font-size:24px;color:var(--text-muted);cursor:pointer;padding:4px;line-height:1;}
.btn-icon-close:hover{color:var(--text);}

/* ====== Select ====== */
.select{padding:8px 12px;border:1px solid var(--border);border-radius:var(--radius-sm);font-size:14px;background:var(--surface);color:var(--text);cursor:pointer;outline:none;transition:border-color .15s;}
.select:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(99,102,241,.1);}
.select-sm{padding:6px 10px;font-size:13px;}

/* ====== 主布局 ====== */
.main{display:flex;gap:16px;padding:16px;flex:1;overflow:hidden;}

/* ====== 面板 ====== */
.panel{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow);display:flex;flex-direction:column;overflow:hidden;}
.input-panel{width:42%;flex-shrink:0;}
.result-panel{flex:1;position:relative;}
.panel-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--border-light);}
.panel-title{font-size:15px;font-weight:600;}
.mode-selector{display:flex;gap:8px;}

/* ====== 模型选择栏 ====== */
.model-bar{display:flex;align-items:center;gap:8px;padding:12px 20px;border-bottom:1px solid var(--border-light);background:#fafbfc;}
.model-label{font-size:13px;color:var(--text-secondary);white-space:nowrap;font-weight:500;}

/* ====== 文本框 ====== */
.textarea-wrap{flex:1;padding:16px 20px;display:flex;flex-direction:column;overflow:hidden;}
.textarea{flex:1;width:100%;border:1px solid var(--border);border-radius:var(--radius-sm);padding:14px;font-size:14px;line-height:1.7;resize:none;outline:none;font-family:inherit;transition:border-color .15s;min-height:200px;}
.textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(99,102,241,.1);}
.char-count{text-align:right;font-size:12px;color:var(--text-muted);margin-top:6px;}

/* ====== 操作栏 ====== */
.action-bar{display:flex;align-items:center;gap:8px;padding:12px 20px;border-top:1px solid var(--border-light);background:#fafbfc;}

/* ====== Tabs ====== */
.tabs{display:flex;border-bottom:1px solid var(--border-light);background:#fafbfc;flex-shrink:0;}
.tab{padding:12px 20px;border:none;background:none;font-size:14px;font-weight:500;color:var(--text-muted);cursor:pointer;border-bottom:2px solid transparent;transition:all .15s;}
.tab:hover{color:var(--text);}
.tab.active{color:var(--primary);border-bottom-color:var(--primary);}

/* ====== Tab内容 ====== */
.tab-content{flex:1;overflow-y:auto;padding:20px;display:none;}
.tab-content.active{display:block;}

/* ====== 结果展示 ====== */
.loading-placeholder{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;color:var(--text-muted);gap:12px;}
.loading-placeholder p{font-size:14px;}
.result-block{margin-bottom:24px;}
.result-block h3{font-size:14px;font-weight:600;margin-bottom:12px;color:var(--text);}
.block-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px;}
.block-header h3{margin-bottom:0;}

.prompt-display{background:#f8fafc;border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px;font-size:14px;line-height:1.8;white-space:pre-wrap;word-break:break-word;max-height:400px;overflow-y:auto;}
.optimized-display{border-left:3px solid var(--primary);background:#eef2ff;}

/* ====== 分析卡片 ====== */
.analysis-card{background:#f8fafc;border-radius:var(--radius-sm);padding:14px;margin-bottom:12px;}
.analysis-card h4{font-size:13px;font-weight:600;margin-bottom:8px;color:var(--text-secondary);}
.analysis-list{list-style:none;padding:0;}
.analysis-list li{padding:6px 0;font-size:13px;color:var(--text);display:flex;gap:8px;}
.analysis-list li::before{content:"";flex-shrink:0;width:6px;height:6px;border-radius:50%;background:var(--primary);margin-top:7px;}

/* ====== 诊断报告 ====== */
.score-overall{display:flex;align-items:center;gap:16px;margin-bottom:20px;padding:16px;background:linear-gradient(135deg,#eef2ff,#f0fdf4);border-radius:var(--radius-sm);}
.score-circle{width:64px;height:64px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:700;flex-shrink:0;}
.score-circle.high{background:#dcfce7;color:#16a34a;}
.score-circle.medium{background:#fef3c7;color:#d97706;}
.score-circle.low{background:#fee2e2;color:#dc2626;}
.score-label{font-size:13px;color:var(--text-secondary);}
.score-value{font-size:28px;font-weight:700;}

.dimension-card{background:#f8fafc;border-radius:var(--radius-sm);padding:14px;margin-bottom:10px;border-left:3px solid var(--border);}
.dimension-card.good{border-left-color:var(--success);}
.dimension-card.warning{border-left-color:var(--warning);}
.dimension-card.error{border-left-color:var(--error);}
.dimension-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px;}
.dimension-name{font-size:14px;font-weight:600;}
.dimension-score{font-size:13px;font-weight:600;padding:2px 8px;border-radius:4px;}
.dimension-score.good{background:#dcfce7;color:#16a34a;}
.dimension-score.warning{background:#fef3c7;color:#d97706;}
.dimension-score.error{background:#fee2e2;color:#dc2626;}
.issue-item{padding:8px 0;border-top:1px solid var(--border-light);font-size:13px;}
.issue-desc{color:var(--text);margin-bottom:4px;}
.issue-suggestion{color:var(--text-secondary);font-style:italic;}
.severity-badge{display:inline-block;padding:1px 6px;border-radius:3px;font-size:11px;font-weight:600;margin-left:6px;}
.severity-high{background:#fee2e2;color:#dc2626;}
.severity-medium{background:#fef3c7;color:#d97706;}
.severity-low{background:#dbeafe;color:#2563eb;}

/* ====== A/B对比 ====== */
.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:20px;}
.compare-col{background:#f8fafc;border-radius:var(--radius-sm);overflow:hidden;}
.compare-col-header{padding:10px 14px;font-size:13px;font-weight:600;border-bottom:1px solid var(--border-light);}
.compare-col-header.original{background:#fee2e2;color:#991b1b;}
.compare-col-header.optimized{background:#dcfce7;color:#166534;}
.compare-col-body{padding:14px;font-size:13px;line-height:1.7;max-height:300px;overflow-y:auto;white-space:pre-wrap;word-break:break-word;}
.score-comparison{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px;}
.score-table{width:100%;border-collapse:collapse;font-size:13px;}
.score-table th,.score-table td{padding:8px 12px;border-bottom:1px solid var(--border-light);text-align:center;}
.score-table th{background:#f8fafc;font-weight:600;color:var(--text-secondary);}
.score-table td:first-child{text-align:left;font-weight:500;}
.improvement-banner{padding:12px 16px;border-radius:var(--radius-sm);text-align:center;font-size:15px;font-weight:600;margin-bottom:16px;}
.improvement-banner.up{background:#dcfce7;color:#16a34a;}
.improvement-banner.down{background:#fee2e2;color:#dc2626;}
.improvement-banner.tie{background:#f1f5f9;color:var(--text-secondary);}

/* ====== 加载 ====== */
.loading-overlay{position:absolute;inset:0;background:rgba(255,255,255,.85);display:flex;flex-direction:column;align-items:center;justify-content:center;z-index:50;backdrop-filter:blur(4px);}
.spinner{width:40px;height:40px;border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite;margin-bottom:16px;}
@keyframes spin{to{transform:rotate(360deg);}}

/* ====== 弹窗 ====== */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.4);display:flex;align-items:center;justify-content:center;z-index:200;backdrop-filter:blur(2px);}
.modal{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow-lg);width:600px;max-height:80vh;display:flex;flex-direction:column;overflow:hidden;}
.modal-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--border-light);}
.modal-header h2{font-size:16px;font-weight:700;}
.modal-body{flex:1;overflow-y:auto;padding:20px;}
.modal-footer{padding:12px 20px;border-top:1px solid var(--border-light);display:flex;justify-content:flex-end;}

/* ====== Provider配置项 ====== */
.provider-config-item{margin-bottom:16px;padding:14px;border:1px solid var(--border);border-radius:var(--radius-sm);}
.provider-config-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px;}
.provider-config-name{font-size:14px;font-weight:600;}
.provider-config-status{font-size:12px;padding:2px 8px;border-radius:4px;}
.provider-config-status.configured{background:#dcfce7;color:#16a34a;}
.provider-config-status.unconfigured{background:#f1f5f9;color:var(--text-muted);}
.provider-config-input{width:100%;padding:8px 12px;border:1px solid var(--border);border-radius:6px;font-size:13px;outline:none;transition:border-color .15s;}
.provider-config-input:focus{border-color:var(--primary);}
.provider-config-models{font-size:12px;color:var(--text-muted);margin-top:6px;}

/* ====== Toast ====== */
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:var(--text);color:#fff;padding:10px 20px;border-radius:var(--radius-sm);font-size:14px;z-index:300;box-shadow:var(--shadow-lg);animation:toastIn .3s ease;}
@keyframes toastIn{from{opacity:0;transform:translateX(-50%) translateY(10px);}to{opacity:1;transform:translateX(-50%) translateY(0);}}
.toast.success{background:var(--success);}
.toast.error{background:var(--error);}

/* ====== 滚动条 ====== */
::-webkit-scrollbar{width:6px;height:6px;}
::-webkit-scrollbar-track{background:transparent;}
::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:3px;}
::-webkit-scrollbar-thumb:hover{background:#94a3b8;}

/* ====== 响应式 ====== */
@media (max-width:1024px){
    .main{flex-direction:column;}
    .input-panel{width:100%;max-height:50vh;}
    .compare-grid{grid-template-columns:1fr;}
    .score-comparison{grid-template-columns:1fr;}
}

/* ====== Logo徽章 ====== */
.logo-badge{display:inline-block;padding:2px 8px;background:linear-gradient(135deg,#6366f1,#8b5cf6);color:#fff;font-size:11px;font-weight:600;border-radius:4px;margin-left:6px;letter-spacing:0.5px;}

/* ====== 场景选择栏 ====== */
.scenario-bar{display:flex;align-items:center;gap:8px;padding:12px 20px;border-bottom:1px solid var(--border-light);background:#fafbfc;flex-wrap:wrap;}
.scenario-select-wrap{display:flex;align-items:center;gap:6px;flex:1;}
.scenario-desc{font-size:12px;color:var(--text-muted);padding:0 20px 8px 20px;background:#fafbfc;display:none;}
.btn-auto-detect{background:#eef2ff;border-color:#c7d2fe;color:var(--primary-dark);font-weight:500;}
.btn-auto-detect:hover{background:#e0e7ff;border-color:var(--primary-light);}

/* ====== 场景标签 ====== */
.scenario-tag-bar{margin-bottom:16px;}
.scenario-tag{display:inline-flex;align-items:center;gap:4px;padding:4px 12px;background:linear-gradient(135deg,#eef2ff,#f0fdf4);color:var(--primary-dark);font-size:13px;font-weight:600;border-radius:20px;border:1px solid #c7d2fe;}