/* ========== 对账系统 CSS ========== */
:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --success: #16a34a;
    --danger: #dc2626;
    --warning: #f59e0b;
    --bg: #f8fafc;
    --card-bg: #ffffff;
    --border: #e2e8f0;
    --text: #1e293b;
    --text-secondary: #64748b;
    --sidebar-bg: #1e293b;
    --sidebar-text: #cbd5e1;
    --sidebar-active: #4f46e5;
    --radius: 8px;
    --shadow: 0 1px 3px 0 rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Microsoft YaHei", sans-serif; background: var(--bg); color: var(--text); font-size: 14px; line-height: 1.5; }
a { color: var(--primary); text-decoration: none; }
h1, h2, h3 { font-weight: 600; }
h1 { font-size: 22px; } h2 { font-size: 18px; } h3 { font-size: 16px; }

/* ========== 登录页 ========== */
.login-container { display: flex; justify-content: center; align-items: center; min-height: 100vh; background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); }
.login-box { background: white; padding: 40px; border-radius: 12px; box-shadow: 0 20px 60px rgba(0,0,0,0.2); width: 380px; max-width: 90vw; }
.login-box h1 { text-align: center; margin-bottom: 30px; color: var(--text); }

/* ========== 主布局 ========== */
.app-container { display: flex; min-height: 100vh; }
.sidebar { width: 220px; background: var(--sidebar-bg); color: var(--sidebar-text); display: flex; flex-direction: column; position: fixed; top: 0; left: 0; bottom: 0; z-index: 100; overflow-y: auto; }
.sidebar-header { padding: 20px 16px; border-bottom: 1px solid rgba(255,255,255,0.1); }
.sidebar-header h2 { color: white; font-size: 16px; }
.sidebar-header small { color: var(--sidebar-text); font-size: 12px; }
.sidebar-nav { flex: 1; padding: 8px 0; }
.nav-item { display: block; padding: 10px 20px; color: var(--sidebar-text); font-size: 14px; transition: all 0.2s; border-left: 3px solid transparent; cursor: pointer; }
.nav-item:hover { background: rgba(255,255,255,0.05); color: white; }
.nav-item.active { background: rgba(79,70,229,0.2); color: white; border-left-color: var(--sidebar-active); }
.sidebar-footer { padding: 12px 16px; border-top: 1px solid rgba(255,255,255,0.1); font-size: 13px; display: flex; justify-content: space-between; align-items: center; }
.logout-link { color: var(--sidebar-text); font-size: 12px; }
.logout-link:hover { color: var(--danger); }

.main-content { flex: 1; margin-left: 220px; padding: 24px; }

/* ========== 页面 ========== */
.page { display: none; }
.page.active { display: block; }
.page-header { margin-bottom: 20px; display: flex; justify-content: space-between; align-items: center; }

/* ========== 表单 ========== */
.form-group { margin-bottom: 14px; }
.form-group label { display: block; margin-bottom: 4px; font-weight: 500; font-size: 13px; color: var(--text-secondary); }
.form-group input, .form-group select { width: 100%; padding: 8px 12px; border: 1px solid var(--border); border-radius: var(--radius); font-size: 14px; outline: none; transition: border-color 0.2s; }
.form-group input:focus, .form-group select:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(79,70,229,0.1); }
.form-card { background: var(--card-bg); padding: 20px; border-radius: var(--radius); box-shadow: var(--shadow); max-width: 480px; }

/* ========== 按钮 ========== */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 8px 18px; border: none; border-radius: var(--radius); font-size: 14px; cursor: pointer; font-weight: 500; transition: all 0.2s; }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-secondary { background: #e2e8f0; color: var(--text); }
.btn-secondary:hover { background: #cbd5e1; }
.btn-outline { background: transparent; color: var(--primary); border: 1px solid var(--primary); }
.btn-outline:hover { background: rgba(79,70,229,0.05); }
.btn-sm { padding: 5px 12px; font-size: 13px; }
.btn-block { width: 100%; }
.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { background: #b91c1c; }
.btn-sm { padding: 4px 10px; font-size: 12px; }

/* ========== 筛选栏 ========== */
.filter-bar { background: var(--card-bg); padding: 16px; border-radius: var(--radius); box-shadow: var(--shadow); margin-bottom: 16px; }
.filter-row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-bottom: 8px; }
.filter-row:last-child { margin-bottom: 0; }
.filter-input { padding: 7px 10px; border: 1px solid var(--border); border-radius: 6px; font-size: 13px; outline: none; min-width: 120px; }
.filter-input:focus { border-color: var(--primary); }

/* ========== 汇总栏 ========== */
.summary-bar { background: var(--card-bg); padding: 12px 16px; border-radius: var(--radius); box-shadow: var(--shadow); margin-bottom: 16px; display: flex; gap: 20px; flex-wrap: wrap; align-items: center; }
.summary-bar span { font-size: 13px; white-space: nowrap; }

/* ========== 表格 ========== */
.table-container { background: var(--card-bg); border-radius: var(--radius); box-shadow: var(--shadow); overflow-x: hidden; }
table { width: 100%; border-collapse: collapse; font-size: 13px; table-layout: auto; }
thead { background: #f1f5f9; }
th { padding: 8px 10px; text-align: left; font-weight: 600; border-bottom: 2px solid var(--border); }
td { padding: 6px 10px; border-bottom: 1px solid var(--border); }
tr:hover { background: #f8fafc; }
.advert-row { background: #fffbe6; }
.advert-row:hover { background: #fff3b8; }
.advert-row td { border-bottom: 1px dashed #f59e0b; color: #92400e; font-weight: 500; }
.empty-td { text-align: center; padding: 40px; color: var(--text-secondary); }
.mt-15 { margin-top: 15px; }
.mt-20 { margin-top: 20px; }

/* ========== 上传区域 ========== */
.upload-zone { border: 2px dashed var(--border); border-radius: 12px; padding: 50px 20px; text-align: center; cursor: pointer; transition: all 0.3s; background: var(--card-bg); margin-bottom: 16px; }
.upload-zone:hover, .upload-zone.dragover { border-color: var(--primary); background: rgba(79,70,229,0.05); }
.upload-icon { font-size: 48px; margin-bottom: 10px; }
.upload-hint { color: var(--text-secondary); font-size: 12px; margin-top: 8px; }
.upload-file-list { text-align: left; margin-top: 10px; padding: 10px; background: #f8fafc; border-radius: 6px; max-height: 150px; overflow-y: auto; }
.upload-file-item { font-size: 12px; padding: 4px 0; display: flex; justify-content: space-between; }
.upload-file-item .remove-file { color: var(--danger); cursor: pointer; }

/* ========== 弹窗 ========== */
.modal { position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0,0,0,0.5); display: flex; justify-content: center; align-items: center; z-index: 1000; }
.modal-content { background: white; padding: 24px; border-radius: 12px; box-shadow: var(--shadow-md); width: 460px; max-width: 90vw; max-height: 80vh; overflow-y: auto; }
.modal-content h3 { margin-bottom: 16px; }
.modal-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 20px; }

/* ========== Tabs ========== */
.tabs { display: flex; gap: 4px; margin-bottom: 16px; border-bottom: 2px solid var(--border); }
.tab-btn { padding: 8px 20px; background: none; border: none; border-bottom: 2px solid transparent; margin-bottom: -2px; cursor: pointer; font-size: 14px; color: var(--text-secondary); }
.tab-btn.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }
.tab-content { display: none; }
.tab-content.active { display: block; }

/* ========== 错误信息 ========== */
.error-msg { background: #fef2f2; color: var(--danger); padding: 10px; border-radius: 6px; margin-bottom: 14px; font-size: 13px; }
.success-msg { background: #f0fdf4; color: var(--success); padding: 10px; border-radius: 6px; margin-bottom: 14px; font-size: 13px; }
.hint { color: var(--text-secondary); font-size: 12px; margin-top: 4px; }

/* ========== 分页 ========== */
.pagination-bar { display: flex; align-items: center; justify-content: center; gap: 10px; flex-wrap: wrap; padding: 16px 0; }
.pill { display: inline-flex; align-items: center; justify-content: center; background: #eef2f7; color: #1e293b; border: 1px solid #e2e8f0; border-radius: 999px; padding: 6px 18px; font-size: 14px; font-weight: 500; cursor: pointer; transition: all 0.2s; white-space: nowrap; }
.pill:hover { background: #e2e8f0; }
.pill:disabled { opacity: 0.4; cursor: not-allowed; }
.pill-info { cursor: default; padding: 6px 18px; }
.pill-info:hover { background: #eef2f7; }
.pill-primary { background: #4f46e5; color: #fff; border-color: #4f46e5; }
.pill-primary:hover { background: #4338ca; }
.pagination-jump { display: flex; align-items: center; gap: 8px; font-size: 14px; color: #1e293b; }
.pagination-jump input { width: 60px; padding: 6px 10px; border: 1px solid #e2e8f0; border-radius: 999px; text-align: center; font-size: 14px; outline: none; }
.pagination-jump input:focus { border-color: #4f46e5; }

/* ========== 响应式 ========== */
@media (max-width: 768px) {
    .sidebar { width: 60px; }
    .sidebar .nav-item { padding: 10px 8px; font-size: 0; text-align: center; }
    .sidebar .nav-item::first-letter { font-size: 16px; }
    .sidebar-header h2 { font-size: 0; }
    .sidebar-header h2::first-letter { font-size: 20px; }
    .sidebar-header small, .sidebar-footer span { display: none; }
    .main-content { margin-left: 60px; padding: 12px; }
    .filter-row { flex-direction: column; }
    .summary-bar { flex-direction: column; gap: 8px; }
}