* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; font-family: -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif;
    color: #1f2937; background: #f3f4f6; font-size: 15px; }
h1 { font-size: 1.4rem; margin: 0 0 .5rem; }
h3 { font-size: 1.05rem; margin: 1.2rem 0 .5rem; }
a { color: #2563eb; text-decoration: none; }
a:hover { text-decoration: underline; }
code { background: #eef2ff; padding: 1px 5px; border-radius: 4px; }

/* 布局：左侧菜单 fixed 钉死在视口，内容区留出菜单宽度，页面滚动只动内容 */
.layout { display: block; min-height: 100vh; }
.content { margin-left: 200px; padding: 1.5rem 2rem; max-width: 1100px; }

/* 导航：固定于视口左侧，永不随页面滚动；"退出"等始终在视口左下角 */
.nav { position: fixed; top: 0; left: 0; bottom: 0; width: 200px; box-sizing: border-box;
    background: #111827; color: #e5e7eb; display: flex; flex-direction: column;
    padding: 1rem .6rem; gap: .2rem; overflow-y: auto; z-index: 100; }
.brand { font-weight: 700; font-size: 1.05rem; padding: .4rem .6rem 1rem; color: #fff; }
.nav-item { color: #cbd5e1; padding: .55rem .7rem; border-radius: 6px; font-size: .95rem; }
.nav-item:hover { background: #1f2937; text-decoration: none; color: #fff; }
.nav-item.active { background: #2563eb; color: #fff; }
.nav-item.danger { color: #fca5a5; }
.nav-spacer { flex: 1; }
.nav-user { border-top: 1px solid #374151; padding-top: .7rem; font-size: .85rem; color: #9ca3af;
    display: flex; flex-direction: column; gap: .3rem; }
.logout-btn { background: none; border: 1px solid #4b5563; color: #cbd5e1; padding: .35rem;
    border-radius: 6px; cursor: pointer; margin-top: .3rem; }
.logout-btn:hover { background: #dc2626; border-color: #dc2626; color: #fff; }

/* 登录 */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: #111827; }
.login-card { background: #fff; padding: 2.2rem; border-radius: 12px; width: 340px; box-shadow: 0 10px 40px rgba(0,0,0,.3); }
.login-card h1 { font-size: 1.2rem; text-align: center; }
.login-card .sub { text-align: center; color: #6b7280; margin-top: 0; }
.login-card label { display: block; margin: .8rem 0 .25rem; font-size: .9rem; color: #374151; }
.login-card input { width: 100%; padding: .6rem; border: 1px solid #d1d5db; border-radius: 7px; font-size: 1rem; }
.login-card button { width: 100%; margin-top: 1.2rem; padding: .65rem; background: #2563eb; color: #fff;
    border: none; border-radius: 7px; font-size: 1rem; cursor: pointer; }
.login-card button:hover { background: #1d4ed8; }

/* 搜索 */
.search-bar { display: flex; gap: .5rem; margin: 1rem 0; }
.search-bar input { flex: 1; padding: .7rem; border: 1px solid #d1d5db; border-radius: 8px; font-size: 1.05rem; }
.search-bar button { padding: .7rem 1.6rem; background: #2563eb; color: #fff; border: none; border-radius: 8px; cursor: pointer; font-size: 1rem; }
.hint, .dim { color: #6b7280; font-size: .9rem; }
.dim { font-size: .85rem; }

/* 表格 */
.grid { width: 100%; border-collapse: collapse; background: #fff; border-radius: 8px; overflow: hidden; margin: .6rem 0; }
.grid th { background: #f9fafb; text-align: left; padding: .6rem .7rem; font-size: .85rem; color: #6b7280; border-bottom: 1px solid #e5e7eb; }
.grid td { padding: .6rem .7rem; border-bottom: 1px solid #f1f5f9; font-size: .92rem; }
.grid tr:hover td { background: #fafbff; }
.row-off td { color: #9ca3af; }

/* 表单 */
.form, .panel { background: #fff; padding: 1.2rem 1.4rem; border-radius: 10px; margin: 1rem 0; box-shadow: 0 1px 3px rgba(0,0,0,.06); }
.form-narrow { max-width: 420px; }
.form-row { margin-bottom: .8rem; display: flex; flex-direction: column; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: .8rem; margin-bottom: .8rem; }
.form label, .panel label { font-size: .85rem; color: #374151; margin-bottom: .25rem; display: block; }
.form input, .form select, .form textarea, .panel input, .panel select {
    padding: .5rem .6rem; border: 1px solid #d1d5db; border-radius: 7px; font-size: .95rem; width: 100%; }
.form-actions { margin-top: 1rem; display: flex; align-items: center; gap: 1rem; }
.req { color: #dc2626; }
.chk { display: inline-flex; align-items: center; gap: .4rem; font-size: .9rem; color: #374151; }
.chk input { width: auto; }
.comp-input input { padding: .35rem .4rem; }

/* 按钮 */
.btn, .btn-primary, .btn-danger, .btn-sm { display: inline-block; border: none; border-radius: 7px; cursor: pointer;
    text-align: center; font-size: .92rem; }
.btn { background: #eef2ff; color: #2563eb; padding: .5rem 1rem; }
.btn-primary { background: #2563eb; color: #fff; padding: .6rem 1.4rem; font-size: 1rem; }
.btn-primary:hover { background: #1d4ed8; }
.btn-danger { background: #dc2626; color: #fff; padding: .6rem 1.4rem; }
.btn-danger:hover { background: #b91c1c; }
.btn-sm { background: #f1f5f9; color: #374151; padding: .3rem .7rem; font-size: .82rem; margin-right: .3rem; }
.btn-sm:hover { background: #e2e8f0; }

/* 提示条 */
.alert-error { background: #fef2f2; color: #b91c1c; padding: .7rem .9rem; border-radius: 8px; margin: .7rem 0; border: 1px solid #fecaca; }
.alert-warn { background: #fffbeb; color: #92400e; padding: .7rem .9rem; border-radius: 8px; margin: .7rem 0; border: 1px solid #fde68a; }
.alert-ok { background: #f0fdf4; color: #15803d; padding: .7rem .9rem; border-radius: 8px; margin: .7rem 0; border: 1px solid #bbf7d0; }

/* 详情 */
.detail-head { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }
.status-badge { padding: .2rem .7rem; border-radius: 20px; font-size: .8rem; color: #fff; }
.status-in_stock { background: #6b7280; } .status-shipped { background: #2563eb; }
.status-repairing { background: #f59e0b; } .status-scrapped { background: #991b1b; }
.meta-row { display: flex; gap: 2rem; flex-wrap: wrap; background: #fff; padding: .9rem 1.2rem; border-radius: 10px; margin: 1rem 0; }
.meta-row .k { display: block; font-size: .78rem; color: #9ca3af; }
.remark { background: #fff; padding: .7rem 1.2rem; border-radius: 8px; color: #374151; }

/* 标签页 */
.tabs { display: flex; gap: .3rem; margin: 1.2rem 0 .5rem; border-bottom: 2px solid #e5e7eb; flex-wrap: wrap; }
.tab { background: none; border: none; padding: .6rem 1rem; cursor: pointer; font-size: .95rem; color: #6b7280; border-bottom: 2px solid transparent; margin-bottom: -2px; }
.tab.active { color: #2563eb; border-bottom-color: #2563eb; font-weight: 600; }

/* 时间线 */
.timeline { list-style: none; padding: 0; margin: .5rem 0; }
.timeline li { display: flex; align-items: baseline; gap: .8rem; padding: .6rem .4rem; border-bottom: 1px solid #f1f5f9; }
.timeline li.voided { opacity: .5; text-decoration: line-through; }
.tl-date { color: #6b7280; font-size: .82rem; white-space: nowrap; font-variant-numeric: tabular-nums; }
.tl-icon { font-size: 1.1rem; }
.tl-summary { flex: 1; }
.tl-src { color: #9ca3af; font-size: .8rem; white-space: nowrap; }

/* 标记 */
.tag { display: inline-block; background: #f1f5f9; color: #475569; padding: .05rem .5rem; border-radius: 5px; font-size: .75rem; }
.tag-blue { background: #dbeafe; color: #1d4ed8; }
.tag-red { background: #fee2e2; color: #b91c1c; }
.tag-gray { background: #e5e7eb; color: #6b7280; }

/* 补录标记：显著醒目 */
.backfill-badge { display: inline-block; background: #fef3c7; color: #92400e; border: 1px solid #fbbf24;
    padding: .12rem .5rem; border-radius: 5px; font-size: .78rem; font-weight: 600; white-space: nowrap; }
.backfill-box { background: #fffbeb; border: 1px solid #fde68a; border-radius: 8px; padding: .8rem 1rem; margin: .8rem 0; }

.pager { display: flex; align-items: center; gap: 1rem; margin: 1rem 0; justify-content: center; }
.pager button:disabled { opacity: .4; cursor: default; }
.target-box { background: #eff6ff; padding: .8rem 1.2rem; border-radius: 8px; margin: 1rem 0; border: 1px solid #bfdbfe; }
.empty-result { background: #fff; padding: 1.5rem; border-radius: 10px; text-align: center; }

/* 统计 */
.stat-tiles { display: flex; gap: 1rem; margin: 1rem 0; }
.tile { background: #fff; padding: 1.2rem 1.6rem; border-radius: 10px; box-shadow: 0 1px 3px rgba(0,0,0,.06); }
.tile-num { font-size: 2rem; font-weight: 700; color: #2563eb; }
.tile-label { color: #6b7280; font-size: .85rem; }
.stat-cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.5rem; }
.barlist { display: flex; flex-direction: column; gap: .4rem; }
.barrow { display: flex; align-items: center; gap: .6rem; }
.barlabel { width: 90px; font-size: .85rem; text-align: right; color: #374151; }
.bar { flex: 1; background: #f1f5f9; border-radius: 5px; height: 18px; overflow: hidden; }
.barfill { display: block; height: 100%; background: #2563eb; }
.barval { width: 30px; font-size: .85rem; color: #6b7280; }

@media (max-width: 640px) {
    /* 手机：菜单回到顶部普通排布，整页滚动 */
    .nav { position: static; width: auto; flex-direction: row; flex-wrap: wrap; overflow: visible; }
    .nav-spacer { display: none; }
    .content { margin-left: 0; padding: 1rem; }
}