:root {
  --primary: #1a73e8;
  --primary-dark: #1557b0;
  --success: #0d9488;
  --warning: #f59e0b;
  --danger: #ef4444;
  --bg: #f0f2f5;
  --card-bg: #fff;
  --text: #1f2937;
  --text-secondary: #6b7280;
  --border: #e5e7eb;
  --sidebar-bg: #1e293b;
  --sidebar-text: #94a3b8;
  --sidebar-active: #3b82f6;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,.1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', sans-serif; background: var(--bg); color: var(--text); min-height: 100vh; }
a { color: var(--primary); text-decoration: none; }

.login-page {
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh; background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}
.login-box {
  background: #fff; border-radius: 16px; padding: 48px 40px; width: 400px;
  box-shadow: 0 20px 60px rgba(0,0,0,.15);
}
.login-box h1 { font-size: 24px; text-align: center; margin-bottom: 8px; color: #1e293b; }
.login-box .subtitle { text-align: center; color: var(--text-secondary); margin-bottom: 32px; font-size: 14px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 13px; font-weight: 500; color: var(--text-secondary); margin-bottom: 6px; }
.form-group input:not([type="checkbox"]):not([type="radio"]), .form-group select, .form-group textarea {
  width: 100%; padding: 10px 14px; border: 1px solid var(--border); border-radius: var(--radius);
  font-size: 14px; transition: border .2s; outline: none;
}
.form-group input:not([type="checkbox"]):not([type="radio"]):focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(26,115,232,.1); }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 10px 20px; border: none; border-radius: var(--radius); font-size: 14px;
  font-weight: 500; cursor: pointer; transition: all .2s;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-success { background: var(--success); color: #fff; }
.btn-warning { background: var(--warning); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-info { background: #3B82F6; color: #fff; }
.btn-info:hover { background: #2563EB; }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-outline:hover { background: #f9fafb; }
.btn-sm { padding: 6px 12px; font-size: 12px; }
.btn-block { width: 100%; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

.layout { display: flex; min-height: 100vh; }
.sidebar {
  width: 240px; background: var(--sidebar-bg); color: var(--sidebar-text);
  display: flex; flex-direction: column; position: fixed; height: 100vh; z-index: 100;
}
.sidebar-header { padding: 20px; border-bottom: 1px solid rgba(255,255,255,.08); }
.sidebar-header h2 { color: #fff; font-size: 18px; }
.sidebar-header .role-badge { font-size: 12px; color: var(--sidebar-active); margin-top: 4px; }
.sidebar-nav { flex: 1; padding: 12px 0; overflow-y: auto; }
.sidebar-nav a {
  display: flex; align-items: center; gap: 10px; padding: 12px 20px;
  color: var(--sidebar-text); font-size: 14px; transition: all .15s; border-left: 3px solid transparent;
}
.sidebar-nav a:hover { background: rgba(255,255,255,.05); color: #e2e8f0; }
.sidebar-nav a.active { background: rgba(59,130,246,.15); color: #fff; border-left-color: var(--sidebar-active); }
.sidebar-nav .nav-group { padding: 8px 20px 4px; font-size: 11px; text-transform: uppercase; letter-spacing: 1px; color: #475569; }
.sidebar-footer { padding: 16px 20px; border-top: 1px solid rgba(255,255,255,.08); }
.sidebar-footer a { color: var(--sidebar-text); font-size: 13px; }

.main-content { margin-left: 240px; flex: 1; padding: 20px; min-height: 100vh; overflow-x: auto; overflow-y: auto; }

/* 飞书等内嵌浏览器强制显示滚动条 */
html, body { overflow: auto; }
html::-webkit-scrollbar, body::-webkit-scrollbar, .main-content::-webkit-scrollbar { width: 8px; height: 8px; }
html::-webkit-scrollbar-thumb, body::-webkit-scrollbar-thumb, .main-content::-webkit-scrollbar-thumb { background: #c1c1c1; border-radius: 4px; }
html::-webkit-scrollbar-track, body::-webkit-scrollbar-track, .main-content::-webkit-scrollbar-track { background: #f1f1f1; }
.page-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; }
.page-header h2 { font-size: 22px; font-weight: 600; }

.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card {
  background: var(--card-bg); border-radius: var(--radius); padding: 20px;
  box-shadow: var(--shadow); display: flex; flex-direction: column;
}
.stat-card .stat-label { font-size: 13px; color: var(--text-secondary); margin-bottom: 8px; }
.stat-card .stat-value { font-size: 28px; font-weight: 700; color: var(--text); }
.stat-card .stat-sub { font-size: 12px; color: var(--text-secondary); margin-top: 4px; }
.stat-card.warning { border-left: 4px solid var(--warning); }
.stat-card.danger { border-left: 4px solid var(--danger); }

.card { background: var(--card-bg); border-radius: var(--radius); box-shadow: var(--shadow); margin-bottom: 24px; }
.card-header { display: flex; align-items: center; justify-content: space-between; padding: 16px 20px; border-bottom: 1px solid var(--border); }
.card-header h3 { font-size: 16px; font-weight: 600; }
.card-body { padding: 20px; }

table { width: 100%; border-collapse: collapse; }
th { text-align: left; padding: 8px 10px; font-size: 12px; font-weight: 600; color: var(--text-secondary); text-transform: uppercase; letter-spacing: .5px; border-bottom: 2px solid var(--border); background: #f9fafb; white-space: nowrap; }
td { padding: 8px 10px; font-size: 13px; border-bottom: 1px solid var(--border); vertical-align: middle; }
tr:hover td { background: #f9fafb; }

.badge {
  display: inline-block; padding: 3px 10px; border-radius: 20px; font-size: 11px; font-weight: 600;
}
.badge-success { background: #d1fae5; color: #065f46; }
.badge-warning { background: #fef3c7; color: #92400e; }
.badge-danger { background: #fee2e2; color: #991b1b; }
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0.4} }
.badge-info { background: #dbeafe; color: #1e40af; }
.badge-secondary { background: #f3f4f6; color: #374151; }

.toolbar { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin-bottom: 16px; }
.toolbar input, .toolbar select { padding: 8px 12px; border: 1px solid var(--border); border-radius: var(--radius); font-size: 13px; }

.pagination { display: flex; align-items: center; justify-content: center; gap: 8px; padding: 16px 0; }
.pagination button { padding: 6px 14px; border: 1px solid var(--border); border-radius: var(--radius); background: #fff; cursor: pointer; font-size: 13px; }
.pagination button:hover { background: #f3f4f6; }
.pagination button:disabled { opacity: .4; cursor: not-allowed; }
.pagination .page-info { font-size: 13px; color: var(--text-secondary); }

.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,.4); display: flex;
  align-items: center; justify-content: center; z-index: 1000;
}
.modal {
  background: #fff; border-radius: 12px; width: 640px; max-width: 90vw;
  max-height: 85vh; display: flex; flex-direction: column; overflow: hidden; box-shadow: 0 20px 60px rgba(0,0,0,.2);
}
.modal-header { display: flex; align-items: center; justify-content: space-between; padding: 20px 24px; border-bottom: 1px solid var(--border); flex-shrink: 0; }
.modal-header h3 { font-size: 18px; }
.modal-close { background: none; border: none; font-size: 24px; cursor: pointer; color: var(--text-secondary); }
.modal-body { padding: 24px; overflow-y: auto; min-height: 0; }
.modal-footer { display: flex; justify-content: flex-end; gap: 12px; padding: 16px 24px; border-top: 1px solid var(--border); flex-shrink: 0; background: #fff; }

.toast {
  position: fixed; top: 20px; right: 20px; padding: 12px 20px; border-radius: var(--radius);
  color: #fff; font-size: 14px; z-index: 9999; animation: slideIn .3s ease;
}
.toast-success { background: var(--success); }
.toast-error { background: var(--danger); }
.toast-warning { background: var(--warning); }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

.empty-state { text-align: center; padding: 60px 20px; color: var(--text-secondary); }
.empty-state .icon { font-size: 48px; margin-bottom: 16px; }
.empty-state p { font-size: 14px; }

/* Banner 卡片式网格 */
.banner-card-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; padding: 4px 0;
}
.banner-card {
  border: 1px solid var(--border); border-radius: 12px; overflow: hidden; background: #fff; transition: box-shadow .2s;
}
.banner-card:hover { box-shadow: 0 4px 16px rgba(0,0,0,.08); }
.banner-card-img {
  width: 100%; min-height: 80px; max-height: 250px; overflow: hidden; background-color: #f5f5f5; display: flex; align-items: center; justify-content: center;
}
.banner-card-img img {
  width: 100%; height: auto; display: block; object-fit: contain;
}
.banner-card-body { padding: 10px 14px 14px; }

/* 图标管理网格 */
.icon-manage-grid { display: flex; flex-direction: column; gap: 8px; padding: 4px 0; }
.icon-manage-item {
  display: flex; justify-content: space-between; align-items: center; padding: 10px 14px;
  border: 1px solid var(--border); border-radius: 10px; background: #fff; transition: box-shadow .2s;
}
.icon-manage-item:hover { box-shadow: 0 2px 8px rgba(0,0,0,.06); }

/* Quill 编辑器样式覆盖 */
.ql-toolbar.ql-snow { border-radius: 8px 8px 0 0; }
.ql-container.ql-snow { border-radius: 0 0 8px 8px; font-size: 14px; }

/* 移动端响应式样式见文件末尾 .mobile-nav-toggle 区块 */

/* ========== 滑动验证码 ========== */
.captcha-wrap {
  margin-bottom: 20px;
}

.captcha-label {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 8px;
  font-weight: 500;
}

.captcha-track {
  position: relative;
  height: 42px;
  background: #eef1f6;
  border-radius: 21px;
  overflow: hidden;
  user-select: none;
  -webkit-user-select: none;
  border: 1px solid #dce0e8;
  transition: border-color .2s;
}

.captcha-track:hover {
  border-color: #b0b8c9;
}

.captcha-target {
  position: absolute;
  top: 4px;
  width: 34px;
  height: 34px;
  background: rgba(26, 115, 232, 0.15);
  border: 2px dashed var(--primary);
  border-radius: 50%;
  display: none;
  pointer-events: none;
  z-index: 1;
}

.captcha-filled {
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, rgba(26,115,232,.12), rgba(26,115,232,.2));
  border-radius: 21px 0 0 21px;
  pointer-events: none;
  transition: none;
}

.captcha-thumb {
  position: absolute;
  left: 0;
  top: 1px;
  width: 40px;
  height: 40px;
  background: #fff;
  border-radius: 50%;
  box-shadow: 0 2px 8px rgba(0,0,0,.15);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: grab;
  color: #8a92a6;
  z-index: 2;
  transition: box-shadow .2s, background .2s;
}

.captcha-thumb:hover {
  box-shadow: 0 3px 12px rgba(0,0,0,.22);
}

.captcha-thumb.dragging {
  cursor: grabbing;
  box-shadow: 0 4px 16px rgba(0,0,0,.25);
  background: #f7f8fa;
}

.captcha-thumb.success {
  background: #0d9488;
  color: #fff;
  cursor: default;
}

.captcha-thumb.fail {
  background: #ef4444;
  color: #fff;
}

.captcha-hint {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  font-size: 13px;
  color: #a0a8b8;
  pointer-events: none;
  white-space: nowrap;
}

.captcha-wrap.verified .captcha-track {
  border-color: #0d9488;
  background: #ecfdf5;
}

.captcha-wrap.verified .captcha-filled {
  background: linear-gradient(90deg, rgba(13,148,136,.1), rgba(13,148,136,.2));
}

.captcha-status {
  font-size: 12px;
  margin-top: 6px;
  min-height: 18px;
}

.captcha-status.status-ok {
  color: #0d9488;
}

.captcha-status.status-fail {
  color: #ef4444;
}

/* ========== 锁定提示 ========== */
.lock-banner {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: var(--radius);
  padding: 12px 16px;
  margin-bottom: 16px;
  color: #b91c1c;
  font-size: 13px;
  font-weight: 500;
}

.lock-banner svg {
  flex-shrink: 0;
  color: #ef4444;
}

/* Toggle switch */
.toggle-switch { position: relative; display: inline-block; width: 44px; height: 24px; vertical-align: middle; cursor: pointer; }
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-switch .slider { position: absolute; inset: 0; background: #cbd5e1; border-radius: 24px; transition: background .2s; }
.toggle-switch .slider::before { content: ''; position: absolute; left: 2px; top: 2px; width: 20px; height: 20px; background: #fff; border-radius: 50%; transition: transform .2s; box-shadow: 0 1px 3px rgba(0,0,0,.2); }
.toggle-switch input:checked + .slider { background: var(--success); }
.toggle-switch input:checked + .slider::before { transform: translateX(20px); }
.toggle-switch.disabled { opacity: .5; cursor: not-allowed; }

/* ========== 移动端汉堡菜单 ========== */
.mobile-nav-toggle {
  display: none;
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 200;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  border: 0;
  background: var(--sidebar-bg);
  color: #fff;
  font-size: 20px;
  line-height: 40px;
  text-align: center;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0,0,0,.2);
  padding: 0;
}
.mobile-nav-mask {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.5);
  z-index: 90;
  opacity: 0;
  transition: opacity .2s ease;
}
.mobile-nav-mask.visible {
  display: block;
  opacity: 1;
}

@media (max-width: 768px) {
  .mobile-nav-toggle { display: block; }

  /* 侧边栏默认隐藏到屏外，点击汉堡按钮才滑入 */
  .sidebar {
    width: 260px;
    transform: translateX(-100%);
    transition: transform .25s ease;
    box-shadow: 4px 0 16px rgba(0,0,0,.2);
  }
  .sidebar.mobile-open {
    transform: translateX(0);
  }

  /* 菜单文字保持横向排列、可点击 */
  .sidebar-nav a {
    padding: 14px 20px;
    font-size: 15px;
    white-space: nowrap;
  }
  .sidebar-nav a span {
    display: inline-block;
  }

  /* 主内容区让出顶部空间给汉堡按钮，且不再因侧边栏占位 */
  .main-content {
    margin-left: 0;
    padding: 60px 14px 20px;
  }

  /* 顶部页头给汉堡按钮让位，避免重叠 */
  .page-header {
    padding-left: 50px;
  }
  .page-header h2 {
    font-size: 18px;
  }

  /* 卡片等其他响应式微调 */
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }
  .banner-card-grid {
    grid-template-columns: 1fr;
  }
  table {
    font-size: 13px;
  }
  .toolbar {
    flex-wrap: wrap;
    gap: 8px;
  }
  .toolbar input, .toolbar select {
    flex: 1 1 auto;
    min-width: 100px;
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }
}