* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --primary: #7c3aed;
    --primary-light: #a78bfa;
    --primary-dark: #5b21b6;
    --bg: #f8f9fc;
    --card: #ffffff;
    --text: #1f2937;
    --text-light: #6b7280;
    --border: #e5e7eb;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --radius: 12px;
    --shadow: 0 4px 20px rgba(124, 58, 237, 0.08);
}
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}
/* 顶部栏 */
.navbar {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: #fff;
    padding: 14px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow);
    position: sticky; top: 0; z-index: 100;
}
.navbar .logo { font-size: 20px; font-weight: 700; }
.navbar .info { display: flex; align-items: center; gap: 16px; font-size: 14px; }
.navbar .times-badge { background: rgba(255,255,255,0.2); padding: 4px 12px; border-radius: 20px; }
.navbar a { color: #fff; text-decoration: none; opacity: .9; }
.navbar a:hover { opacity: 1; }
/* 容器 */
.container { max-width: 1200px; margin: 24px auto; padding: 0 16px; }
/* 卡片 */
.card { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 24px; margin-bottom: 20px; }
.card h2 { font-size: 18px; margin-bottom: 16px; color: var(--primary-dark); }
/* 上传区 */
.upload-area {
    border: 2px dashed var(--primary-light);
    border-radius: var(--radius);
    padding: 40px;
    text-align: center;
    cursor: pointer;
    transition: all .3s;
    background: #faf5ff;
}
.upload-area:hover, .upload-area.dragover { border-color: var(--primary); background: #f3e8ff; }
.upload-area .icon { font-size: 48px; color: var(--primary); }
.upload-area p { color: var(--text-light); margin-top: 8px; }
/* 表单元素 */
.form-row { margin-bottom: 16px; }
.form-row label { display: block; font-weight: 600; margin-bottom: 6px; color: var(--text); }
select, input[type="text"], input[type="password"], textarea {
    width: 100%; padding: 10px 14px; border: 1px solid var(--border);
    border-radius: 8px; font-size: 14px; outline: none; transition: border-color .2s;
}
select:focus, input:focus, textarea:focus { border-color: var(--primary); }
textarea { resize: vertical; min-height: 120px; font-family: inherit; }
/* 按钮 */
.btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 10px 20px; border: none; border-radius: 8px;
    font-size: 14px; font-weight: 600; cursor: pointer; transition: all .2s;
    text-decoration: none;
}
.btn-primary { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: #fff; }
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 4px 12px rgba(124,58,237,.3); }
.btn-primary:disabled { opacity: .5; cursor: not-allowed; transform: none; }
.btn-outline { background: #fff; color: var(--primary); border: 1px solid var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-sm { padding: 6px 12px; font-size: 12px; }
/* 对比区 */
.compare-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.compare-box { border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.compare-box .box-header { padding: 10px 14px; background: #f9fafb; font-weight: 600; font-size: 14px; display:flex; justify-content:space-between; align-items:center; }
.compare-box .box-content { padding: 14px; height: 400px; overflow-y: auto; white-space: pre-wrap; word-break: break-word; font-size: 14px; line-height: 1.8; }
/* 差异高亮 */
.diff-add { background: #dcfce7; padding: 1px 3px; border-radius: 3px; }
.diff-del { background: #fee2e2; text-decoration: line-through; padding: 1px 3px; border-radius: 3px; }
/* 模态框 */
.modal-mask { position: fixed; inset: 0; background: rgba(0,0,0,.5); display: none; align-items: center; justify-content: center; z-index: 1000; }
.modal-mask.active { display: flex; }
.modal { background: #fff; border-radius: var(--radius); padding: 28px; width: 90%; max-width: 420px; box-shadow: 0 20px 60px rgba(0,0,0,.2); }
.modal h3 { margin-bottom: 16px; color: var(--primary-dark); }
.modal .actions { display: flex; gap: 10px; margin-top: 20px; }
.modal .actions .btn { flex: 1; justify-content: center; }
/* 加载动画 */
.loading { display: inline-block; width: 16px; height: 16px; border: 2px solid #fff; border-top-color: transparent; border-radius: 50%; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
/* Toast */
.toast { position: fixed; top: 80px; left: 50%; transform: translateX(-50%); padding: 12px 24px; border-radius: 8px; color: #fff; z-index: 2000; opacity: 0; transition: opacity .3s; }
.toast.show { opacity: 1; }
.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }
.toast.warning { background: var(--warning); }
/* Skill标签 */
.skill-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.skill-tag {
    padding: 8px 12px; border: 1px solid var(--border); border-radius: 10px;
    cursor: pointer; font-size: 13px; transition: all .2s; background: #fff;
    display: flex; align-items: center; gap: 6px; flex-wrap: wrap;
    line-height: 1.4;
}
.skill-tag:hover { border-color: var(--primary-light); background: #faf5ff; }
.skill-tag.active { background: linear-gradient(135deg,var(--primary),var(--primary-dark)); color: #fff; border-color: var(--primary); box-shadow: 0 2px 8px rgba(124,58,237,.25); }
.skill-tag .sk-name { font-weight: 600; }
.skill-tag .sk-int { font-size: 11px; padding: 1px 6px; border-radius: 8px; background: #ede9fe; color: #5b21b6; }
.skill-tag.active .sk-int { background: rgba(255,255,255,.25); color: #fff; }
.skill-tag .sk-scene { font-size: 11px; color: #6b7280; }
.skill-tag.active .sk-scene { color: rgba(255,255,255,.85); }
.skill-empty { color: #9ca3af; padding: 12px; text-align: center; font-size: 13px; width: 100%; }

/* Skill 分类 Tab */
.skill-cat-tabs { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
.skill-cat-tab {
    padding: 5px 12px; border-radius: 16px; font-size: 12px;
    cursor: pointer; background: #f3f4f6; color: #6b7280; transition: all .15s;
    border: 1px solid transparent;
}
.skill-cat-tab:hover { background: #ede9fe; color: #5b21b6; }
.skill-cat-tab.active { background: linear-gradient(135deg,var(--primary),var(--primary-dark)); color: #fff; }

/* 表单提示 */
.form-hint { color: var(--text-light); font-size: 12px; margin-top: 6px; line-height: 1.5; }
.form-hint b { color: var(--primary); }

/* ========== 指标面板 ========== */
.metrics-panel { animation: fadeIn .3s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(-4px); } to { opacity: 1; transform: none; } }
.metrics-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.metric-card {
    background: #faf5ff; border-radius: 10px; padding: 14px;
    border: 1px solid #ede9fe;
}
.metric-label { font-size: 12px; color: #6b7280; margin-bottom: 8px; font-weight: 600; }
.metric-value { display: flex; align-items: center; gap: 10px; font-size: 14px; flex-wrap: wrap; }
.metric-value b { font-size: 20px; color: var(--primary-dark); font-weight: 700; }
.metric-orig, .metric-rewr { display: flex; flex-direction: column; align-items: flex-start; gap: 2px; }
.metric-rewr b { color: var(--primary); }
.metric-arrow { color: #9ca3af; font-size: 18px; }
.metric-value .ml { font-size: 11px; color: #6b7280; font-weight: 400; }
.metric-bar { height: 6px; background: #e5e7eb; border-radius: 3px; overflow: hidden; margin-top: 8px; }
.metric-bar .bar-fill, .metric-bar > span { display: block; height: 100%; background: var(--primary); transition: width .4s ease; border-radius: 3px; }
.metric-bar.diff .bar-fill, .metric-bar.diff > span { background: linear-gradient(90deg,#10b981,#34d399); }
.bar-fill.lv-low { background: #10b981; }
.bar-fill.lv-mid { background: #f59e0b; }
.bar-fill.lv-high { background: #ef4444; }
.metric-hint { font-size: 11px; color: #6b7280; margin-top: 6px; }

.metrics-detail { margin-top: 12px; }
.m-detail-empty { color: #9ca3af; font-size: 13px; padding: 8px 0; }
.m-detail-row {
    display: grid; grid-template-columns: 1.5fr 0.8fr 0.9fr 0.8fr 1.5fr;
    gap: 8px; padding: 6px 8px; border-bottom: 1px dashed #e5e7eb; font-size: 12px; align-items: center;
}
.m-detail-row .m-l { color: #374151; font-weight: 600; }
.m-detail-row .m-orig { color: #6b7280; }
.m-detail-row .m-rewr { color: var(--primary); }
.m-detail-row .m-delta .lv-low { color: #10b981; font-weight: 600; }
.m-detail-row .m-delta .lv-mid { color: #f59e0b; }
.m-detail-row .m-delta .lv-high { color: #ef4444; font-weight: 600; }
.m-detail-row .m-sample { color: #9ca3af; font-size: 11px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
/* 历史记录 */
.history-item { padding: 12px; border-bottom: 1px solid var(--border); cursor: pointer; transition: background .2s; }
.history-item:hover { background: #f9fafb; }
.history-item .h-title { font-weight: 600; font-size: 14px; }
.history-item .h-meta { font-size: 12px; color: var(--text-light); margin-top: 4px; }
/* 流式光标 */
.cursor-blink::after { content: '▊'; animation: blink 1s step-end infinite; color: var(--primary); }
@keyframes blink { 50% { opacity: 0; } }
/* 警告横幅 */
.banner-warning { background: #fef3c7; color: #92400e; padding: 10px 16px; text-align: center; font-size: 14px; }
/* 响应式 */
@media (max-width: 768px) {
    .compare-grid { grid-template-columns: 1fr; }
    .navbar { padding: 12px 16px; }
    .navbar .info { gap: 10px; font-size: 13px; }
    .container { padding: 0 12px; margin: 16px auto; }
    .card { padding: 16px; }
    .card h2 { font-size: 16px; }
    /* 指标面板移动端单列 */
    .metrics-grid { grid-template-columns: 1fr; }
    .metric-value b { font-size: 18px; }
    .m-detail-row {
        grid-template-columns: 1fr 1fr;
        grid-template-rows: auto auto;
        gap: 4px 8px;
    }
    .m-detail-row .m-sample { grid-column: 1 / -1; white-space: normal; }
    /* Skill tag 移动端更大触控区 */
    .skill-tag { padding: 10px 14px; font-size: 14px; }
    .skill-cat-tab { padding: 6px 14px; font-size: 13px; }
    .btn-sm { padding: 8px 12px; font-size: 13px; }
}

/* ---------- 底部版权美化 ---------- */
.footer {
    margin-top: 32px;
    padding: 28px 20px 24px;
    text-align: center;
    border-top: 1px solid rgba(124, 58, 237, 0.12);
    background: linear-gradient(180deg, rgba(124, 58, 237, 0.03) 0%, rgba(124, 58, 237, 0) 100%);
    border-radius: 12px 12px 0 0;
}
.footer .footer-brand {
    font-size: 15px;
    font-weight: 600;
    color: #5b21b6;
    margin-bottom: 8px;
    letter-spacing: 0.5px;
}
.footer .footer-brand a {
    color: #7c3aed;
    text-decoration: none;
    transition: opacity 0.2s;
}
.footer .footer-brand a:hover { opacity: 0.75; }
.footer .footer-meta {
    font-size: 12px;
    color: #94a3b8;
    line-height: 1.8;
}
.footer .footer-meta .sep {
    display: inline-block;
    margin: 0 8px;
    color: #cbd5e1;
}
.footer .footer-copyright {
    margin-top: 6px;
    font-size: 12px;
    color: #94a3b8;
}