* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { height: 100%; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif; font-size: 14px; color: #2c3e50; background: #f4f6fa; }
a { text-decoration: none; color: inherit; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
input, select, textarea { font-family: inherit; font-size: inherit; outline: none; }
ul, ol { list-style: none; }

:root {
    --primary: #4f7cff;
    --primary-dark: #3a67e6;
    --success: #19be6b;
    --warning: #ff9900;
    --danger: #ed4014;
    --gray-100: #f4f6fa;
    --gray-200: #e8ebf0;
    --gray-300: #d4d7de;
    --gray-500: #909399;
    --gray-700: #606266;
    --gray-900: #303133;
    --sidebar-w: 220px;
    --header-h: 56px;
    --radius: 6px;
    --shadow: 0 2px 12px rgba(0,0,0,0.06);
}

/* ============ Login ============ */
.login-wrapper { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); }
.login-box { width: 400px; background: #fff; border-radius: 12px; box-shadow: 0 20px 60px rgba(0,0,0,0.2); padding: 40px; }
.login-box .logo { text-align: center; margin-bottom: 28px; }
.login-box .logo h1 { font-size: 24px; color: var(--gray-900); margin-top: 8px; }
.login-box .logo .icon { width: 56px; height: 56px; background: linear-gradient(135deg, #667eea, #764ba2); border-radius: 14px; display: inline-flex; align-items: center; justify-content: center; color: #fff; font-size: 28px; font-weight: bold; }
.login-box .subtitle { text-align: center; color: var(--gray-500); margin-bottom: 24px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; margin-bottom: 6px; color: var(--gray-700); font-weight: 500; }
.form-control { width: 100%; height: 42px; padding: 0 14px; border: 1px solid var(--gray-300); border-radius: var(--radius); transition: border-color .2s; }
.form-control:focus { border-color: var(--primary); }
textarea.form-control { height: auto; padding: 10px 14px; min-height: 100px; resize: vertical; }
.btn { height: 42px; padding: 0 20px; border-radius: var(--radius); font-weight: 500; font-size: 14px; transition: all .2s; display: inline-flex; align-items: center; justify-content: center; gap: 6px; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-primary.btn-block { width: 100%; }
.btn-success { background: var(--success); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-warning { background: var(--warning); color: #fff; }
.btn-default { background: #fff; color: var(--gray-700); border: 1px solid var(--gray-300); }
.btn-default:hover { border-color: var(--primary); color: var(--primary); }
.btn-sm { height: 30px; padding: 0 12px; font-size: 12px; }
.btn-link { color: var(--primary); padding: 0; height: auto; }
.btn-link:hover { text-decoration: underline; }
.alert { padding: 10px 14px; border-radius: var(--radius); margin-bottom: 16px; font-size: 13px; }
.alert-error { background: #fef0f0; color: var(--danger); border: 1px solid #fde2e2; }
.alert-success { background: #f0f9eb; color: var(--success); border: 1px solid #e1f3d8; }

/* ============ Layout ============ */
.layout { display: flex; min-height: 100vh; }
.sidebar { width: var(--sidebar-w); background: #1f2d3d; color: #fff; display: flex; flex-direction: column; position: fixed; top: 0; left: 0; bottom: 0; z-index: 100; }
.sidebar .brand { height: var(--header-h); display: flex; align-items: center; padding: 0 20px; font-size: 16px; font-weight: 600; border-bottom: 1px solid rgba(255,255,255,0.08); gap: 10px; }
.sidebar .brand .b-icon { width: 32px; height: 32px; border-radius: 8px; background: linear-gradient(135deg, #667eea, #764ba2); display: inline-flex; align-items: center; justify-content: center; font-weight: bold; }
.sidebar .nav { flex: 1; padding: 12px 0; overflow-y: auto; }
.sidebar .nav .nav-title { padding: 12px 20px 6px; font-size: 11px; text-transform: uppercase; color: rgba(255,255,255,0.35); letter-spacing: 1px; }
.sidebar .nav .nav-item { display: flex; align-items: center; padding: 11px 20px; color: rgba(255,255,255,0.7); cursor: pointer; transition: all .15s; gap: 10px; font-size: 14px; }
.sidebar .nav .nav-item:hover { background: rgba(255,255,255,0.06); color: #fff; }
.sidebar .nav .nav-item.active { background: rgba(79,124,255,0.2); color: #fff; border-left: 3px solid var(--primary); padding-left: 17px; }
.sidebar .nav .nav-item .n-icon { width: 18px; text-align: center; }

.main { flex: 1; margin-left: var(--sidebar-w); display: flex; flex-direction: column; min-height: 100vh; }
.header { height: var(--header-h); background: #fff; display: flex; align-items: center; justify-content: space-between; padding: 0 24px; border-bottom: 1px solid var(--gray-200); box-shadow: var(--shadow); position: sticky; top: 0; z-index: 50; }
.header .breadcrumb { font-size: 14px; color: var(--gray-700); }
.header .breadcrumb .current { color: var(--gray-900); font-weight: 500; }
.header .right { display: flex; align-items: center; gap: 16px; }
.header .user { display: flex; align-items: center; gap: 10px; cursor: pointer; }
.header .user .avatar { width: 34px; height: 34px; border-radius: 50%; background: linear-gradient(135deg, #667eea, #764ba2); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: bold; font-size: 13px; }
.header .user .name { color: var(--gray-700); }
.dropdown { position: relative; }
.dropdown .menu { position: absolute; right: 0; top: 44px; background: #fff; border-radius: 8px; box-shadow: 0 8px 24px rgba(0,0,0,0.12); min-width: 160px; padding: 6px 0; display: none; }
.dropdown.open .menu { display: block; }
.dropdown .menu .item { padding: 9px 18px; color: var(--gray-700); font-size: 13px; cursor: pointer; display: flex; gap: 8px; }
.dropdown .menu .item:hover { background: var(--gray-100); color: var(--primary); }
.dropdown .menu .divider { height: 1px; background: var(--gray-200); margin: 6px 0; }

.content { flex: 1; padding: 24px; }
.page-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; }
.page-header h2 { font-size: 20px; color: var(--gray-900); font-weight: 600; }

/* ============ Dashboard ============ */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card { background: #fff; border-radius: 10px; padding: 20px; box-shadow: var(--shadow); }
.stat-card .label { color: var(--gray-500); font-size: 13px; margin-bottom: 8px; }
.stat-card .value { font-size: 28px; font-weight: 700; color: var(--gray-900); }
.stat-card .sub { margin-top: 8px; font-size: 12px; color: var(--gray-500); }
.stat-card.primary { border-left: 4px solid var(--primary); }
.stat-card.success { border-left: 4px solid var(--success); }
.stat-card.warning { border-left: 4px solid var(--warning); }
.stat-card.danger { border-left: 4px solid var(--danger); }
.stat-card.info { border-left: 4px solid #56b5f0; }

.row-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 20px; }
@media (max-width: 1000px) { .row-grid { grid-template-columns: 1fr; } }
.card { background: #fff; border-radius: 10px; box-shadow: var(--shadow); overflow: hidden; }
.card-head { padding: 16px 20px; border-bottom: 1px solid var(--gray-200); font-weight: 600; display: flex; justify-content: space-between; align-items: center; }
.card-body { padding: 16px 20px; }
.mini-list .item { display: flex; align-items: center; padding: 10px 0; border-bottom: 1px dashed var(--gray-200); gap: 12px; }
.mini-list .item:last-child { border-bottom: none; }
.mini-list .item .thumb { width: 44px; height: 62px; background: var(--gray-100); border-radius: 4px; flex-shrink: 0; background-size: cover; background-position: center; }
.mini-list .item .info { flex: 1; min-width: 0; }
.mini-list .item .title { font-size: 14px; color: var(--gray-900); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.mini-list .item .meta { font-size: 12px; color: var(--gray-500); margin-top: 4px; }
.mini-list .item .badge { font-size: 11px; padding: 2px 8px; border-radius: 10px; background: var(--gray-100); color: var(--gray-500); }
.mini-list .item .badge.hot { background: #fef0f0; color: var(--danger); }
.mini-list .item .badge.rating { background: #fdf6ec; color: var(--warning); }

/* ============ Table ============ */
.table-wrap { background: #fff; border-radius: 10px; box-shadow: var(--shadow); overflow: hidden; }
table.data-table { width: 100%; border-collapse: collapse; }
table.data-table th, table.data-table td { padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--gray-200); font-size: 13px; }
table.data-table th { background: #fafbfc; color: var(--gray-700); font-weight: 600; white-space: nowrap; }
table.data-table tr:hover td { background: #f8faff; }
table.data-table td .thumb { width: 48px; height: 66px; border-radius: 4px; background: var(--gray-100); background-size: cover; background-position: center; }
table.data-table td .title-cell .t1 { font-weight: 500; color: var(--gray-900); }
table.data-table td .title-cell .t2 { font-size: 12px; color: var(--gray-500); margin-top: 2px; }
.pagination { display: flex; justify-content: flex-end; align-items: center; gap: 8px; padding: 16px; }
.pagination .page-btn { min-width: 32px; height: 32px; padding: 0 10px; border-radius: 4px; color: var(--gray-700); font-size: 13px; border: 1px solid var(--gray-300); }
.pagination .page-btn:hover { color: var(--primary); border-color: var(--primary); }
.pagination .page-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.pagination .page-info { color: var(--gray-500); font-size: 12px; }

/* ============ Search / Toolbar ============ */
.toolbar { background: #fff; padding: 14px 18px; border-radius: 10px; box-shadow: var(--shadow); margin-bottom: 16px; display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.toolbar .form-control { height: 36px; min-width: 180px; width: auto; }
.toolbar .form-control.wider { min-width: 260px; }
.toolbar .sep { flex: 1; }
.chip { display: inline-block; padding: 2px 10px; border-radius: 10px; background: var(--gray-100); color: var(--gray-500); font-size: 12px; margin-right: 4px; }
.chip.primary { background: #ecf2ff; color: var(--primary); }
.chip.success { background: #f0f9eb; color: var(--success); }
.chip.warning { background: #fdf6ec; color: var(--warning); }
.chip.danger { background: #fef0f0; color: var(--danger); }
.chip.info { background: #e6f7ff; color: #1890ff; }
.tag-switch { display: inline-block; width: 36px; height: 20px; background: var(--gray-300); border-radius: 20px; cursor: pointer; position: relative; vertical-align: middle; transition: background .2s; }
.tag-switch.on { background: var(--success); }
.tag-switch::after { content: ""; position: absolute; top: 2px; left: 2px; width: 16px; height: 16px; border-radius: 50%; background: #fff; transition: left .2s; box-shadow: 0 1px 2px rgba(0,0,0,0.15); }
.tag-switch.on::after { left: 18px; }

/* ============ Modal ============ */
.modal-mask { position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 1000; display: flex; align-items: center; justify-content: center; opacity: 0; visibility: hidden; transition: all .2s; }
.modal-mask.show { opacity: 1; visibility: visible; }
.modal { background: #fff; border-radius: 10px; width: 720px; max-width: 94vw; max-height: 92vh; display: flex; flex-direction: column; transform: translateY(20px); transition: transform .2s; }
.modal-mask.show .modal { transform: translateY(0); }
.modal-head { padding: 16px 22px; border-bottom: 1px solid var(--gray-200); display: flex; justify-content: space-between; align-items: center; }
.modal-head h3 { font-size: 16px; }
.modal-head .close { font-size: 20px; color: var(--gray-500); cursor: pointer; padding: 4px 8px; }
.modal-body { padding: 20px 22px; overflow-y: auto; flex: 1; }
.modal-foot { padding: 14px 22px; border-top: 1px solid var(--gray-200); display: flex; justify-content: flex-end; gap: 10px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-row .col-full { grid-column: 1 / -1; }
@media (max-width: 720px) { .form-row { grid-template-columns: 1fr; } }

/* ============ Toast ============ */
.toast-wrap { position: fixed; top: 24px; left: 50%; transform: translateX(-50%); z-index: 2000; display: flex; flex-direction: column; gap: 8px; }
.toast { padding: 10px 18px; border-radius: 6px; background: #fff; box-shadow: 0 4px 14px rgba(0,0,0,0.15); min-width: 200px; font-size: 14px; animation: toastIn .2s ease; }
.toast.success { border-left: 4px solid var(--success); }
.toast.error { border-left: 4px solid var(--danger); }
.toast.info { border-left: 4px solid var(--primary); }
@keyframes toastIn { from { opacity: 0; transform: translateY(-10px); } to { opacity: 1; transform: translateY(0); } }

/* ============ Upload ============ */
.upload-area { border: 2px dashed var(--gray-300); border-radius: var(--radius); padding: 24px; text-align: center; color: var(--gray-500); cursor: pointer; transition: all .2s; }
.upload-area:hover { border-color: var(--primary); color: var(--primary); }
.upload-area.has-preview { border-style: solid; padding: 10px; }
.upload-area img.max-120 { max-width: 120px; max-height: 160px; border-radius: 4px; }
.upload-area img.thumb { width: 80px; height: 110px; object-fit: cover; border-radius: 4px; }

.empty { padding: 40px; text-align: center; color: var(--gray-500); }

/* Sub nav */
.sub-list-item { padding: 12px 16px; border: 1px solid var(--gray-200); border-radius: var(--radius); margin-bottom: 8px; display: grid; gap: 8px; }
.sub-list-item .s-row { display: grid; grid-template-columns: 100px 1fr 1fr 80px; gap: 10px; align-items: center; }
.sub-list-item .s-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.sub-list-item .s-head .title { font-weight: 500; color: var(--gray-900); }
.sub-list-item .s-head .actions { display: flex; gap: 6px; }

.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--gray-200); margin-bottom: 16px; }
.tabs .tab { padding: 10px 18px; cursor: pointer; color: var(--gray-500); border-bottom: 2px solid transparent; margin-bottom: -1px; }
.tabs .tab:hover { color: var(--primary); }
.tabs .tab.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 500; }
.tab-pane { display: none; }
.tab-pane.active { display: block; }

.bar-group { display: flex; flex-direction: column; align-items: center; gap: 2px; flex: 1; min-width: 30px; }
.bar-group .bar { width: 14px; border-radius: 3px 3px 0 0; min-height: 2px; transition: height .3s; }
.bar-group .bar:hover { opacity: .8; }
.bar-group .bar-label { font-size: 11px; color: var(--gray-500); margin-top: 4px; }

@media (max-width: 768px) {
    .stat-grid { grid-template-columns: repeat(2, 1fr); }
    .bar-group .bar { width: 10px; }
}