:root {
    --bg: #f5f6f8;
    --panel: #ffffff;
    --ink: #1f2937;
    --ink-2: #4b5563;
    --gray: #9aa3af;
    --border: #e5e7eb;
    --gold: #b08d2e;
    --gold-light: #d9bc6a;
    --gold-bg: #fdf6e3;
    --danger: #c0392b;
    --sidebar-w: 230px;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
    background: var(--bg); color: var(--ink);
    font: 14px/1.6 -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

/* 登录页 */
.login-body { display: flex; min-height: 100vh; align-items: center; justify-content: center; background: linear-gradient(135deg, #1f2937, #111827); }
.login-card { background: #fff; padding: 36px 40px; border-radius: 12px; width: 360px; box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3); }
.login-brand { text-align: center; margin-bottom: 22px; }
.login-logo { font-size: 22px; font-weight: 700; color: var(--gold); letter-spacing: 2px; }
.login-sub { font-size: 12.5px; color: var(--gray); margin-top: 4px; }
.login-card form label { display: block; margin: 12px 0; }
.login-card input { width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 6px; font-size: 14px; }
.login-tip { font-size: 12px; color: var(--gray); text-align: center; margin-top: 16px; }

/* 布局 */
.sidebar {
    position: fixed; top: 0; left: 0; bottom: 0; width: var(--sidebar-w);
    background: linear-gradient(180deg, #1f2937, #111827);
    color: #d1d5db; padding: 24px 0; box-shadow: 2px 0 8px rgba(0, 0, 0, 0.1); overflow-y: auto;
}
.side-brand { text-align: center; padding: 0 20px 24px; border-bottom: 1px solid rgba(255, 255, 255, 0.08); }
.side-logo { font-size: 18px; font-weight: 700; color: var(--gold-light); letter-spacing: 2px; }
.side-sub { font-size: 11.5px; color: rgba(255, 255, 255, 0.4); margin-top: 4px; }
.side-nav { display: flex; flex-direction: column; padding: 14px 0; }
.side-nav a {
    padding: 10px 24px; color: #d1d5db; text-decoration: none; font-size: 14px;
    border-left: 3px solid transparent; transition: all 0.15s;
}
.side-nav a:hover { background: rgba(255, 255, 255, 0.05); color: #fff; }
.side-nav a.active { background: rgba(176, 141, 46, 0.15); color: var(--gold-light); border-left-color: var(--gold); }
.side-logout { margin-top: 20px; border-top: 1px solid rgba(255, 255, 255, 0.08); color: #f87171 !important; }
.main { margin-left: var(--sidebar-w); padding: 0; min-height: 100vh; }

/* 顶栏 */
.page-head { background: #fff; padding: 18px 28px; border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; }
.page-head h1 { font-size: 18px; font-weight: 600; margin: 0; }
.page-user { font-size: 13px; color: var(--gray); }
.page-user b { color: var(--ink); }

/* 卡片与表单 */
.panel { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 24px; margin: 16px 28px; box-shadow: var(--shadow); }
.panel h2 { font-size: 15px; font-weight: 600; margin: 0 0 14px; padding-bottom: 8px; border-bottom: 1px solid var(--border); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-row.check-row { gap: 18px; }
.form label { display: block; margin: 10px 0; font-size: 13px; color: var(--ink-2); }
.form input[type=text], .form input[type=number], .form input[type=date], .form input[type=password], .form input:not([type]), .form select, .form textarea {
    width: 100%; padding: 8px 11px; border: 1px solid var(--border); border-radius: 6px; font-size: 14px; margin-top: 4px; font-family: inherit;
}
.form input:focus, .form select:focus, .form textarea:focus { outline: none; border-color: var(--gold); box-shadow: 0 0 0 3px rgba(176, 141, 46, 0.1); }
.form textarea { line-height: 1.6; resize: vertical; }
.checkbox { display: inline-flex; align-items: center; gap: 6px; margin: 6px 12px 6px 0; font-weight: 400; cursor: pointer; }
.checkbox input { width: auto; margin: 0; }
.form-help { color: var(--gray); font-size: 12.5px; margin: 4px 0 8px; }
.form-foot { padding: 12px 28px 28px; display: flex; gap: 10px; }
.btn-primary, .btn-ghost {
    display: inline-block; padding: 8px 18px; border-radius: 6px; font-size: 14px;
    border: 1px solid var(--gold); cursor: pointer; text-decoration: none; transition: all 0.15s;
}
.btn-primary { background: var(--gold); color: #fff; }
.btn-primary:hover { background: #946e1c; }
.btn-ghost { background: #fff; color: var(--ink-2); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--gold); color: var(--gold); }

/* 数据表格 */
.toolbar { padding: 16px 28px; display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.search-form { display: flex; gap: 8px; }
.search-form input, .search-form select { padding: 7px 11px; border: 1px solid var(--border); border-radius: 6px; font-size: 13.5px; }
.data-table { width: calc(100% - 56px); margin: 0 28px 28px; border-collapse: collapse; background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.data-table th, .data-table td { padding: 11px 14px; text-align: left; font-size: 13.5px; border-bottom: 1px solid var(--border); }
.data-table th { background: #fafbfc; color: var(--ink-2); font-weight: 600; font-size: 13px; }
.data-table tr:hover td { background: #fafbfc; }
.data-table code { background: #f3f4f6; padding: 1px 6px; border-radius: 4px; font-size: 12.5px; }
.dim { color: var(--gray); font-size: 12.5px; }
.thumb { width: 38px; height: 38px; object-fit: cover; border-radius: 4px; vertical-align: middle; margin-right: 8px; border: 1px solid var(--border); }
.op { color: var(--gold); text-decoration: none; font-size: 13px; margin-right: 10px; }
.op:hover { text-decoration: underline; }
.op-danger { color: var(--danger); }
.tag { display: inline-block; padding: 2px 8px; border-radius: 4px; font-size: 11.5px; margin-right: 4px; }
.tag-verified { background: #ecfdf5; color: #047857; }
.tag-public   { background: #eef3f7; color: #3f6480; }
.tag-self     { background: #fef3c7; color: #92400e; }
.tag-gold     { background: var(--gold-bg); color: var(--gold); border: 1px solid var(--gold-light); }
.tag-gray     { background: #f3f4f6; color: var(--gray); }

/* 数据概览 */
.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; padding: 20px 28px; }
.stat-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 20px; text-decoration: none; color: inherit; transition: all 0.2s; box-shadow: var(--shadow); }
.stat-card:hover { border-color: var(--gold); transform: translateY(-2px); }
.stat-num { font-size: 30px; font-weight: 700; color: var(--gold); line-height: 1.1; }
.stat-label { font-size: 14px; color: var(--ink-2); margin-top: 4px; }
.stat-sub { font-size: 12px; color: var(--gray); margin-top: 6px; }
.quick-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; padding: 0 28px 20px; }
.quick-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 20px; text-decoration: none; color: inherit; }
.quick-card:hover { border-color: var(--gold); }
.quick-icon { font-size: 22px; }
.quick-title { font-size: 15px; font-weight: 600; margin: 6px 0 4px; }
.quick-desc { font-size: 12.5px; color: var(--gray); }
.help-list { padding-left: 22px; color: var(--ink-2); }
.help-list li { margin: 6px 0; }

/* 横幅管理 */
.banner-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; padding: 0 28px 28px; }
.banner-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.banner-img { width: 100%; aspect-ratio: 16/7; background: #f3f4f6; }
.banner-img img { width: 100%; height: 100%; object-fit: cover; }
.banner-meta { padding: 12px 16px; }
.banner-op { margin-top: 8px; }

/* 图片上传控件 */
.image-input { display: flex; gap: 8px; }
.image-input input { flex: 1; }
.image-input-multi { display: grid; grid-template-columns: 1fr auto; gap: 8px; align-items: start; }
.image-input-multi textarea { width: 100%; }

/* 提示 */
.alert { padding: 12px 16px; border-radius: 6px; margin: 14px 28px; font-size: 14px; }
.alert.ok  { background: #ecfdf5; color: #065f46; }
.alert.err { background: #fee2e2; color: #991b1b; }

/* 响应式 */
@media (max-width: 900px) {
    .sidebar { transform: translateX(-100%); }
    .main { margin-left: 0; }
    .stat-grid, .quick-grid { grid-template-columns: 1fr 1fr; }
    .banner-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
}