/* ============================================================
   管理后台样式
   ============================================================ */

:root {
  --ink: #1f2937;
  --ink-2: #6b7280;
  --line: #e5e7eb;
  --blue-700: #0e7490;
  --blue-600: #0891b2;
  --blue-500: #06b6d4;
  --blue-100: #cffafe;
  --red: #dc2626;
  --green: #16a34a;
  --amber: #d97706;
  --bg: #f3f6f8;
  --sidebar-w: 220px;
  --radius: 12px;
  --font: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: var(--font); color: var(--ink); background: var(--bg);
  font-size: 14px; line-height: 1.6;
}
a { color: var(--blue-600); text-decoration: none; }
a:hover { color: var(--blue-700); }
img { max-width: 100%; }
em { color: var(--ink-2); font-style: normal; font-size: 12px; }

/* ---------- 布局 ---------- */
.admin-layout { display: flex; min-height: 100vh; }
.sidebar {
  width: var(--sidebar-w); background: #0b3b4d; color: #cfeef5;
  display: flex; flex-direction: column; position: sticky; top: 0; height: 100vh;
  flex: none;
}
.sidebar-brand { padding: 22px 20px 16px; border-bottom: 1px solid rgba(255,255,255,.12); }
.sidebar-brand a { color: #fff; display: block; }
.sidebar-brand strong { font-size: 17px; display: block; }
.sidebar-brand small { color: #9ad6e6; font-size: 12px; }
.sidebar-nav { flex: 1; padding: 14px 10px; display: flex; flex-direction: column; gap: 4px; }
.sidebar-nav a {
  color: #cfeef5; padding: 10px 14px; border-radius: 9px; display: flex; align-items: center; gap: 10px;
  font-size: 14px; transition: all .15s;
}
.sidebar-nav a:hover { background: rgba(255,255,255,.08); color: #fff; }
.sidebar-nav a.active { background: var(--blue-600); color: #fff; }
.menu-icon { width: 20px; text-align: center; }
.sidebar-foot { padding: 14px; border-top: 1px solid rgba(255,255,255,.12); }
.sidebar-foot a { color: #9ad6e6; font-size: 13px; }
.sidebar-foot a:hover { color: #fff; }

.admin-main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.admin-topbar {
  background: #fff; border-bottom: 1px solid var(--line); padding: 0 24px;
  height: 58px; display: flex; align-items: center; gap: 16px; position: sticky; top: 0; z-index: 20;
}
.topbar-title { font-size: 17px; font-weight: 700; flex: 1; }
.sidebar-toggle { display: none; background: none; border: 0; font-size: 20px; cursor: pointer; color: var(--ink); }
.topbar-user { display: flex; align-items: center; gap: 10px; }
.user-name { font-weight: 600; }
.user-role { background: var(--blue-100); color: var(--blue-700); font-size: 12px; padding: 2px 10px; border-radius: 999px; }
.logout-btn { color: var(--red); border: 1px solid #fecaca; padding: 5px 14px; border-radius: 8px; font-size: 13px; }
.logout-btn:hover { background: #fef2f2; color: var(--red); }

.admin-content { padding: 24px; max-width: 1200px; width: 100%; margin: 0 auto; }

/* ---------- Flash ---------- */
.flash { padding: 12px 16px; border-radius: 10px; margin-bottom: 16px; font-size: 14px; }
.flash-success { background: #f0fdf4; color: var(--green); border: 1px solid #bbf7d0; }
.flash-error   { background: #fef2f2; color: var(--red); border: 1px solid #fecaca; }
.flash-warning { background: #fffbeb; color: var(--amber); border: 1px solid #fde68a; }
.flash a { color: inherit; font-weight: 700; }

/* ---------- 卡片 ---------- */
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; margin-bottom: 22px;
}
.card-narrow { max-width: 640px; }
.card-wide { max-width: 980px; }
.card-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 18px; flex-wrap: wrap; }
.card-head h2 { font-size: 17px; }
.card-tip { color: var(--ink-2); font-size: 12.5px; margin-top: 12px; }
.empty { color: var(--ink-2); padding: 30px 0; text-align: center; }

/* ---------- 统计卡 ---------- */
.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-bottom: 22px; }
.stat-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; text-align: center; }
.stat-num { font-size: 32px; font-weight: 800; color: var(--blue-600); }
.stat-label { color: var(--ink-2); margin-top: 4px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block; padding: 10px 24px; border: 0; border-radius: 10px; cursor: pointer;
  background: var(--blue-600); color: #fff; font-size: 14px; font-weight: 600; transition: all .15s;
}
.btn:hover { background: var(--blue-700); color: #fff; }
.btn-sm { padding: 7px 16px; font-size: 13px; }
.btn-lg { padding: 12px 40px; font-size: 15px; }
.btn-ghost { background: #fff; color: var(--ink); border: 1px solid var(--line); }
.btn-ghost:hover { background: var(--bg); }
.btn-block { width: 100%; padding: 12px; }

/* ---------- 表格 ---------- */
.table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.table th, .table td { text-align: left; padding: 11px 10px; border-bottom: 1px solid var(--line); vertical-align: middle; }
.table th { background: var(--bg); font-weight: 600; white-space: nowrap; }
.table tr:hover td { background: #fafdff; }
.thumb { width: 52px; height: 52px; object-fit: cover; border-radius: 8px; border: 1px solid var(--line); }
.no-thumb { color: var(--ink-2); font-size: 12px; }
.sub-line { display: block; color: var(--ink-2); font-size: 12px; }
.td-actions { white-space: nowrap; }
.td-actions a { margin-right: 10px; }
.link-btn { background: none; border: 0; color: var(--blue-600); cursor: pointer; font-size: 13.5px; padding: 0; margin-right: 10px; }
.link-btn:hover { color: var(--blue-700); text-decoration: underline; }
.link-danger { color: var(--red); }
.link-danger:hover { color: var(--red); }
.inline-form { display: inline; }
.badge { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: 12px; }
.badge-on { background: #dcfce7; color: var(--green); }
.badge-off { background: #f3f4f6; color: var(--ink-2); }
.badge-admin { background: #fef3c7; color: var(--amber); }
.badge-editor { background: #e0f2fe; color: #0369a1; }

/* ---------- 表单 ---------- */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-weight: 600; margin-bottom: 6px; }
.form-group input[type="text"], .form-group input[type="password"], .form-group input[type="number"],
.form-group select, .form-group textarea, .list-filter input[type="text"], .list-filter select {
  width: 100%; padding: 9px 12px; border: 1px solid var(--line); border-radius: 9px;
  font-size: 14px; font-family: var(--font); outline: none; background: #fff;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus, .list-filter input:focus, .list-filter select:focus {
  border-color: var(--blue-500);
}
.form-group textarea { resize: vertical; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 20px; }
.form-full { grid-column: 1 / -1; }
.form-tip { color: var(--ink-2); font-size: 12.5px; margin-top: 6px; }
.form-check-row { display: flex; gap: 26px; margin: 6px 0 18px; }
.check-item { display: flex; align-items: center; gap: 7px; font-weight: 500; cursor: pointer; }
.check-lg { font-size: 15px; font-weight: 600; }
.check-item input { width: 16px; height: 16px; }

/* 上传预览 */
.upload-row { display: flex; gap: 18px; align-items: flex-start; flex-wrap: wrap; }
.upload-preview {
  width: 130px; height: 130px; border: 1px dashed var(--line); border-radius: 10px;
  overflow: hidden; display: flex; align-items: center; justify-content: center; background: var(--bg);
}
.upload-preview img { width: 100%; height: 100%; object-fit: contain; }
.upload-preview-wide { width: 320px; height: 150px; }
.upload-preview-logo { width: 130px; height: 130px; }
.preview-empty { color: var(--ink-2); font-size: 12px; }

/* ---------- 列表筛选 / 快速链接 ---------- */
.list-filter { display: flex; gap: 10px; margin-bottom: 18px; flex-wrap: wrap; }
.list-filter select { width: 160px; }
.list-filter input[type="text"] { flex: 1; min-width: 180px; }
.quick-links { display: flex; flex-wrap: wrap; gap: 12px; }
.quick-links a {
  padding: 10px 18px; border: 1px solid var(--line); border-radius: 10px; background: var(--bg); color: var(--ink);
}
.quick-links a:hover { border-color: var(--blue-500); color: var(--blue-700); }

/* ---------- 弹窗（改名） ---------- */
.modal-mask { position: fixed; inset: 0; z-index: 100; background: rgba(15,23,42,.5); display: flex; align-items: center; justify-content: center; padding: 20px; }
.modal-box { background: #fff; border-radius: var(--radius); padding: 24px; width: 100%; max-width: 420px; }
.modal-box h3 { margin-bottom: 16px; }
.modal-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 6px; }

/* ---------- 登录页 ---------- */
.login-body { background: linear-gradient(135deg, #0b3b4d, var(--blue-600)); min-height: 100vh; display: flex; align-items: center; justify-content: center; }
.login-wrap { width: 100%; max-width: 400px; padding: 20px; }
.login-card { background: #fff; border-radius: 16px; padding: 34px 32px; box-shadow: 0 24px 60px rgba(0,0,0,.25); }
.login-head { text-align: center; margin-bottom: 22px; }
.login-head img { width: 64px; height: 64px; object-fit: contain; margin: 0 auto 12px; }
.login-head h1 { font-size: 20px; }
.login-head p { color: var(--ink-2); font-size: 13px; margin-top: 4px; }
.login-foot { text-align: center; margin-top: 18px; font-size: 13px; }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .sidebar { position: fixed; left: 0; top: 0; z-index: 100; transform: translateX(-100%); transition: transform .2s; }
  .sidebar.open { transform: translateX(0); }
  .sidebar-toggle { display: block; }
  .admin-content { padding: 18px 14px; }
}
@media (max-width: 640px) {
  .form-grid { grid-template-columns: 1fr; }
  .form-full { grid-column: auto; }
  .topbar-user .user-role { display: none; }
  .table { display: block; overflow-x: auto; white-space: nowrap; }
}