:root {
    --bg: #f3f4f8;
    --surface: #ffffff;
    --border: #e5e7eb;
    --text: #1f2937;
    --text2: #6b7280;
    --primary: #7c3aed;
    --primary2: #06b6d4;
    --danger: #ef4444;
    --success: #22c55e;
    --warning: #f59e0b;
    --radius: 10px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { height: 100%; }
body {
    font-family: "PingFang SC","Microsoft YaHei",sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 14px;
    line-height: 1.6;
}

/* 布局 */
.layout { display: flex; min-height: 100vh; }
.topbar {
    position: fixed; top: 0; left: 0; right: 0; height: 52px;
    background: linear-gradient(90deg, var(--primary), var(--primary2));
    color: #fff; display: flex; align-items: center; padding: 0 16px; z-index: 100;
    justify-content: space-between;
}
.brand a { color: #fff; text-decoration: none; font-weight: bold; font-size: 16px; }
.topbar-right { display: flex; align-items: center; gap: 12px; font-size: 13px; }
.balance-badge {
    background: rgba(255,255,255,.18); padding: 3px 8px; border-radius: 99px; font-weight: bold;
}
.logout-link { color: #fff; text-decoration: none; opacity: .9; }
.logout-link:hover { opacity: 1; }
.menu-toggle {
    background: none; border: none; color: #fff; font-size: 20px; cursor: pointer; display: none; margin-right: 8px;
}

.sidebar {
    width: 210px; background: var(--surface); border-right: 1px solid var(--border);
    padding-top: 68px; position: fixed; top: 0; bottom: 0; left: 0; overflow-y: auto; z-index: 90;
    transition: transform .25s;
}
.sidebar nav { padding: 6px; }
.nav-item {
    display: flex; align-items: center; gap: 10px; padding: 10px 12px; border-radius: 8px;
    color: var(--text2); text-decoration: none; margin-bottom: 4px; font-size: 14px;
    position: relative;
}
.nav-item:hover { background: #f9fafb; color: var(--text); }
.nav-item.active { background: linear-gradient(90deg, rgba(124,58,237,.08), rgba(6,182,212,.08)); color: var(--primary); font-weight: 600; }
.nav-icon { font-size: 16px; width: 22px; text-align: center; }
.badge {
    position: absolute; right: 8px; top: 50%; transform: translateY(-50%);
    background: var(--danger); color: #fff; font-size: 11px; padding: 1px 6px; border-radius: 99px;
}
.sidebar-mask { display: none; position: fixed; inset: 0; background: rgba(0,0,0,.35); z-index: 80; }

.main {
    flex: 1; margin-left: 210px; padding: 68px 20px 40px; max-width: 1100px; width: 100%;
}
.footer {
    margin-left: 210px; padding: 16px 20px; text-align: center; color: var(--text2); font-size: 12px;
}
.page-title { font-size: 18px; font-weight: 600; margin-bottom: 14px; color: var(--text); }

@media (max-width: 860px) {
    .menu-toggle { display: inline-block; }
    .sidebar { transform: translateX(-110%); }
    .sidebar.open { transform: translateX(0); }
    .sidebar-mask.open { display: block; }
    .main, .footer { margin-left: 0; }
    .topbar-right .user-name { display: none; }
}

/* 卡片/面板 */
.card {
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; margin-bottom: 16px;
}
.card-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.card-title { font-size: 15px; font-weight: 600; }

/* 表单 */
input[type="text"], input[type="password"], input[type="number"], input[type="email"], textarea, select {
    width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; background: #fff;
    outline: none;
}
input:focus, textarea:focus, select:focus { border-color: var(--primary); }
select { height: 42px; }
textarea { min-height: 100px; resize: vertical; }
.btn {
    display: inline-block; padding: 10px 18px; border: none; border-radius: 8px;
    background: linear-gradient(90deg, var(--primary), var(--primary2)); color: #fff; font-size: 14px; cursor: pointer; text-decoration: none;
}
.btn:hover { opacity: .92; }
.btn.block { display: block; width: 100%; text-align: center; }
.btn.sm { padding: 6px 12px; font-size: 13px; }
.btn-outline {
    background: #fff; color: var(--primary); border: 1px solid var(--primary);
}
.btn-outline:hover { background: linear-gradient(90deg, var(--primary), var(--primary2)); color: #fff; }
.btn-danger { background: var(--danger); }
.btn-success { background: var(--success); }
.btn-warning { background: var(--warning); color: #1f2937; }

.form-group { margin-bottom: 14px; }
.form-label { display: block; font-size: 13px; color: var(--text2); margin-bottom: 6px; }
.form-tip { font-size: 12px; color: var(--text2); margin-top: 4px; }

/* 表格 */
table { width: 100%; border-collapse: collapse; font-size: 13px; }
thead th { background: #f9fafb; text-align: left; padding: 10px 8px; font-weight: 600; color: var(--text2); }
tbody td { padding: 10px 8px; border-top: 1px solid var(--border); vertical-align: middle; }
@media (max-width: 700px) {
    .table-responsive { overflow-x: auto; -webkit-overflow-scrolling: touch; }
}

/* 分页 */
.pagination { margin-top: 14px; display: flex; gap: 6px; flex-wrap: wrap; }
.pagination a { padding: 6px 10px; border: 1px solid var(--border); border-radius: 6px; color: var(--text); text-decoration: none; font-size: 13px; }
.pagination a.active { background: linear-gradient(90deg, var(--primary), var(--primary2)); color: #fff; border-color: transparent; }

/* 标签页 */
.tabs { display: flex; gap: 8px; margin-bottom: 14px; border-bottom: 1px solid var(--border); }
.tab {
    padding: 8px 14px; font-size: 14px; color: var(--text2); cursor: pointer; border-bottom: 2px solid transparent; margin-bottom: -1px; text-decoration: none;
}
.tab.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* 订单状态 */
.st-pending    { color: var(--warning); }
.st-processing { color: var(--primary); }
.st-success    { color: var(--success); }
.st-error      { color: var(--danger); }
.st-refunding  { color: var(--warning); }
.st-refunded   { color: var(--text2); }
.st-cancelled  { color: var(--text2); }
.tag {
    display: inline-block; padding: 2px 8px; border-radius: 99px; font-size: 12px; font-weight: 600;
}
.tag-info  { background: #eff6ff; color: #2563eb; }
.tag-ok    { background: #f0fdf4; color: #16a34a; }
.tag-warn  { background: #fffbeb; color: #d97706; }
.tag-err   { background: #fef2f2; color: #dc2626; }

/* 提醒 */
.alert { padding: 12px 14px; border-radius: 8px; margin-bottom: 14px; font-size: 13px; }
.alert-info  { background: #eff6ff; color: #1e40af; border: 1px solid #dbeafe; }
.alert-ok    { background: #f0fdf4; color: #166534; border: 1px solid #bbf7d0; }
.alert-err   { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }
.alert-warn  { background: #fffbeb; color: #92400e; border: 1px solid #fde68a; }

/* 登录页专用 */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 20px; }
.login-box { width: 100%; max-width: 420px; background: var(--surface); border-radius: 14px; padding: 28px; box-shadow: 0 10px 40px rgba(0,0,0,.08); }
.login-box h2 { text-align: center; margin-bottom: 6px; }
.login-box .sub { text-align: center; color: var(--text2); font-size: 13px; margin-bottom: 22px; }
.captcha-box { display: flex; gap: 10px; align-items: center; }
.captcha-box canvas { border: 1px solid var(--border); border-radius: 6px; cursor: pointer; background: #fff; }

/* 首页统计 */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px,1fr)); gap: 12px; margin-bottom: 16px; }
.stat-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px; }
.stat-label { font-size: 12px; color: var(--text2); }
.stat-value { font-size: 20px; font-weight: 700; margin-top: 4px; color: var(--text); }

/* 购物车/订单卡片 */
.order-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px; margin-bottom: 10px; display: grid; grid-template-columns: 1fr auto; gap: 10px; align-items: center; }
.order-info { font-size: 13px; color: var(--text2); }

/* 九宫格 */
.grid9 { display: grid; grid-template-columns: repeat(3,1fr); gap: 12px; }
.grid9 .item {
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 6px; text-align: center;
    text-decoration: none; color: var(--text); transition: transform .12s, box-shadow .12s;
}
.grid9 .item:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,0,0,.06); }
.grid9 .item-icon { font-size: 28px; margin-bottom: 6px; }
.grid9 .item-name { font-size: 13px; }

/* 空状态 */
.empty { text-align: center; padding: 40px 20px; color: var(--text2); font-size: 13px; }
.empty-icon { font-size: 36px; margin-bottom: 10px; }

/* 工具 */
.hide { display: none; }
.mt-2 { margin-top: 8px; }
.mb-2 { margin-bottom: 8px; }
.w-full { width: 100%; }

/* 快捷金额按钮 */
.amount-quick { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 8px; }
.amount-quick button {
    flex: 1; min-width: 64px; padding: 8px 0; border: 1px solid var(--border); border-radius: 8px;
    background: #fff; color: var(--primary); font-size: 14px; font-weight: 600; cursor: pointer; transition: all .15s;
}
.amount-quick button:hover { background: linear-gradient(90deg, var(--primary), var(--primary2)); color: #fff; border-color: transparent; }

/* USDT 充值订单展示 */
.usdt-order { text-align: center; }
.usdt-qrcode { margin: 16px auto; padding: 12px; background: #fff; border: 1px solid var(--border); border-radius: 12px; display: inline-block; }
.usdt-qrcode img { display: block; border-radius: 8px; }
.usdt-detail { text-align: left; margin-top: 8px; }
.copy-row { display: flex; gap: 8px; align-items: center; }
.copy-row code { flex: 1; padding: 8px 10px; background: #f9fafb; border-radius: 6px; border: 1px solid var(--border); }