* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #1a4a7a;
    --primary-light: #2979c4;
    --primary-dark: #0d3358;
    --secondary: #f0f4f8;
    --success: #27ae60;
    --warning: #e67e22;
    --danger: #e74c3c;
    --bg: #f5f7fa;
    --card-bg: #fff;
    --border: #e0e6ed;
    --text: #2c3e50;
    --text-light: #7f8c9a;
    --sidebar-width: 220px;
    --topbar-height: 56px;
    --radius: 6px;
    --shadow: 0 2px 8px rgba(0,0,0,0.06);
}

body {
    font-family: 'Microsoft YaHei', 'Segoe UI', sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 14px;
}

/* ===== 登录页 ===== */
.login-body {
    background: linear-gradient(135deg, #1a4a7a 0%, #0d3358 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.login-container {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
    width: 400px;
    max-width: 90vw;
    overflow: hidden;
}

.login-header {
    background: var(--primary);
    color: #fff;
    padding: 36px 20px;
    text-align: center;
}

.login-logo {
    display: block;
    margin: 0 auto 12px;
    background: none;
}

.login-logo img {
    width: 245px;
    height: 65px;
    object-fit: contain;
    display: block;
    margin: 0 auto;
}

.login-header h1 { font-size: 22px; margin-bottom: 4px; }
.login-header p { font-size: 13px; opacity: 0.8; }

.login-form { padding: 32px; }

.login-footer {
    text-align: center;
    padding: 16px;
    color: var(--text-light);
    font-size: 12px;
    border-top: 1px solid var(--border);
}

.form-group { margin-bottom: 18px; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 600; color: var(--text); }

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    transition: border-color 0.2s;
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(41,121,196,0.1);
}

.form-group textarea { resize: vertical; min-height: 60px; }

.btn-login {
    width: 100%;
    padding: 12px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    font-size: 16px;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-login:hover { background: var(--primary-dark); }
.btn-login:disabled { opacity: 0.6; cursor: not-allowed; }

.login-msg { margin-top: 12px; font-size: 13px; text-align: center; }
.login-msg.error { color: var(--danger); }

/* ===== 主布局 ===== */
.app-layout {
    display: flex;
    min-height: 100vh;
}

/* ===== 侧边栏 ===== */
.sidebar {
    width: var(--sidebar-width);
    background: var(--primary-dark);
    color: #fff;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    overflow-y: auto;
    z-index: 100;
    transition: transform 0.3s;
}

.sidebar-logo {
    height: var(--topbar-height);
    display: flex;
    align-items: center;
    padding: 0 20px;
    gap: 8px;
    background: rgba(0,0,0,0.2);
}

.logo-text { font-size: 20px; font-weight: bold; color: #fff; }
.logo-sub { font-size: 14px; color: rgba(255,255,255,0.6); }

.sidebar-nav { padding: 8px 0; }

.nav-section { margin-bottom: 4px; }

.nav-section-title {
    padding: 8px 20px 4px;
    font-size: 11px;
    color: rgba(255,255,255,0.4);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 9px 20px;
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    transition: all 0.15s;
    border-left: 3px solid transparent;
    font-size: 13px;
}

.nav-item:hover {
    color: #fff;
    background: rgba(255,255,255,0.05);
}

.nav-item.active {
    color: #fff;
    background: rgba(255,255,255,0.1);
    border-left-color: var(--primary-light);
}

.nav-icon { font-size: 10px; opacity: 0.5; }

/* ===== 顶栏 ===== */
.main-area {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
}

.topbar {
    height: var(--topbar-height);
    background: #fff;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    position: sticky;
    top: 0;
    z-index: 50;
}

.topbar-left { display: flex; align-items: center; gap: 16px; }

.sidebar-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 22px;
    cursor: pointer;
    color: var(--text);
}

.company-selector { display: flex; align-items: center; gap: 6px; }
.company-selector label { font-size: 13px; color: var(--text-light); white-space: nowrap; }
.company-selector select {
    padding: 6px 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 13px;
    background: #fff;
    cursor: pointer;
    max-width: 220px;
}

.topbar-right { display: flex; align-items: center; gap: 16px; }
.user-info { font-size: 13px; color: var(--text-light); }
.btn-logout {
    padding: 6px 14px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-light);
    cursor: pointer;
    font-size: 13px;
    transition: all 0.2s;
}
.btn-logout:hover { border-color: var(--danger); color: var(--danger); }

/* ===== 内容区 ===== */
.content { padding: 20px; flex: 1; }

.loading { text-align: center; padding: 40px; color: var(--text-light); }

/* ===== 页面标题 ===== */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    flex-wrap: wrap;
    gap: 12px;
}

.page-title { font-size: 20px; font-weight: 600; color: var(--text); }

/* ===== 按钮 ===== */
.btn {
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 13px;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-family: inherit;
}

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }

.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { opacity: 0.9; }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { opacity: 0.9; }

.btn-default { background: #fff; border: 1px solid var(--border); color: var(--text); }
.btn-default:hover { background: var(--secondary); }

.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-link { background: none; color: var(--primary-light); padding: 2px 6px; font-size: 13px; }
.btn-link:hover { text-decoration: underline; }
.btn-link.danger { color: var(--danger); }

/* ===== 卡片 ===== */
.card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.card-body { padding: 16px; }

/* ===== 统计卡片 ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 20px;
}

.stat-card {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--primary);
}

.stat-card.success::before { background: var(--success); }
.stat-card.warning::before { background: var(--warning); }
.stat-card.danger::before { background: var(--danger); }

.stat-label { font-size: 13px; color: var(--text-light); margin-bottom: 8px; }
.stat-value { font-size: 24px; font-weight: 700; color: var(--text); }
.stat-sub { font-size: 12px; color: var(--text-light); margin-top: 4px; }

/* ===== 表格 ===== */
.table-wrap {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

.data-table th {
    background: var(--secondary);
    padding: 10px 12px;
    text-align: left;
    font-weight: 600;
    color: var(--text);
    white-space: nowrap;
    border-bottom: 2px solid var(--border);
}

.data-table td {
    padding: 9px 12px;
    border-bottom: 1px solid var(--border);
    color: var(--text);
}

.data-table tr:hover td { background: #f8fafe; }
.data-table tr:last-child td { border-bottom: none; }

/* ===== 状态标签 ===== */
.tag {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 12px;
    font-weight: 500;
}

.tag-pending { background: #fef3cd; color: #856404; }
.tag-partial { background: #d1ecf1; color: #0c5460; }
.tag-completed { background: #d4edda; color: #155724; }
.tag-cancelled { background: #f8d7da; color: #721c24; }

/* ===== 搜索栏 ===== */
.search-bar {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
    flex-wrap: wrap;
    align-items: center;
}

.search-bar input,
.search-bar select {
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 13px;
    font-family: inherit;
}

.search-bar input { min-width: 200px; }

/* ===== 分页 ===== */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 12px;
}

.pagination button {
    padding: 6px 12px;
    border: 1px solid var(--border);
    background: #fff;
    border-radius: 4px;
    cursor: pointer;
    font-size: 13px;
}

.pagination button:hover { background: var(--secondary); }
.pagination button.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.pagination button:disabled { opacity: 0.4; cursor: not-allowed; }
.pagination-info { font-size: 13px; color: var(--text-light); padding: 0 12px; }

/* ===== 模态框 ===== */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal {
    background: #fff;
    border-radius: 8px;
    width: 90%;
    max-width: 700px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
}

.modal-header h3 { font-size: 18px; color: var(--text); }

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-light);
    line-height: 1;
}

.modal-body { padding: 20px; overflow-y: auto; flex: 1; }
.modal-footer {
    padding: 12px 20px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

/* ===== 表单行 ===== */
.form-row {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
}

.form-row .form-group { flex: 1; }

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-grid .full { grid-column: 1 / -1; }

/* ===== 明细表 ===== */
.items-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 8px;
}

.items-table th {
    background: var(--secondary);
    padding: 8px;
    font-size: 12px;
    text-align: left;
}

.items-table td {
    padding: 4px 8px;
    border-bottom: 1px solid var(--border);
}

.items-table input,
.items-table select {
    width: 100%;
    padding: 5px 8px;
    border: 1px solid var(--border);
    border-radius: 3px;
    font-size: 13px;
}

.items-table .col-action { width: 50px; text-align: center; }

/* ===== Toast ===== */
.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: var(--text);
    color: #fff;
    padding: 12px 24px;
    border-radius: var(--radius);
    font-size: 14px;
    z-index: 2000;
    animation: slideUp 0.3s ease;
}

.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }
.toast.warning { background: var(--warning); }

@keyframes slideUp {
    from { transform: translateY(100px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

/* ===== 空状态 ===== */
.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-light);
}

.empty-state p { font-size: 14px; margin-top: 8px; }

/* ===== 详情页 ===== */
.detail-section {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 16px;
    margin-bottom: 16px;
}

.detail-section h4 {
    font-size: 15px;
    color: var(--primary);
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
}

.detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 12px;
}

.detail-item { display: flex; flex-direction: column; }
.detail-item label { font-size: 12px; color: var(--text-light); margin-bottom: 2px; }
.detail-item span { font-size: 14px; color: var(--text); }

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .main-area { margin-left: 0; }
    .sidebar-toggle { display: block; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .form-grid { grid-template-columns: 1fr; }
    .form-row { flex-direction: column; }
    .company-selector select { max-width: 140px; }
    .data-table { font-size: 12px; }
    .data-table th, .data-table td { padding: 6px 8px; }
}

/* 供应商搜索下拉 */
#supplierSearch {
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 14px;
}

/* 商品搜索下拉 */
.product-search {
    padding: 6px 8px;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 13px;
}

.product-dropdown {
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    border-radius: 4px;
}

.product-option:hover {
    background: var(--primary-light) !important;
    color: #fff;
}

/* 迷你统计卡片 */
.stat-mini {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: 10px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
}

.stat-mini .stat-label {
    font-size: 12px;
    color: var(--text-light);
}

.stat-mini .stat-value {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
}

/* 表单内联按钮 */
.btn-sm {
    padding: 6px 12px;
    font-size: 13px;
    white-space: nowrap;
}

/* 明细表格行内输入框 */
.items-table input[type="text"],
.items-table input[type="number"] {
    width: 100%;
    padding: 4px 6px;
    border: 1px solid var(--border);
    border-radius: 3px;
    font-size: 13px;
}

.items-table input[readonly] {
    border-color: transparent;
}

.col-action {
    text-align: center;
}