/*
 * ═══════════════════════════════════════════════════════
 *   Nebula Coral — 星云珊瑚 · 现代化 UI 设计系统
 *   深空科技美学 × 玻璃拟态 × 微交互
 * ═══════════════════════════════════════════════════════
 */

/* ═══════════════ 设计令牌 ═══════════════ */
:root {
  /* ── 背景系统 ── */
  --bg-deep: #080c14;
  --bg-primary: #0d1117;
  --bg-secondary: #131820;
  --bg-elevated: #161b25;
  --bg-surface: #1a1f2b;

  /* ── 强调色 ── */
  --accent-1: #FF6B6B;
  --accent-2: #FF8E53;
  --accent-3: #FFB800;
  --gradient-accent: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  --gradient-warm: linear-gradient(135deg, var(--accent-2), var(--accent-3));
  --gradient-fire: linear-gradient(135deg, #FF4757, var(--accent-1), var(--accent-2));
  --gradient-ocean: linear-gradient(135deg, #00D68F, #00B4D8);
  --gradient-cosmic: linear-gradient(135deg, #7C3AED, #EC4899);
  --gradient-aurora: linear-gradient(135deg, #06B6D4, #7C3AED, #EC4899);

  /* ── 语义色 ── */
  --success: #00D68F;
  --success-bg: rgba(0, 214, 143, 0.12);
  --warning: #FFB800;
  --warning-bg: rgba(255, 184, 0, 0.12);
  --error: #FF4757;
  --error-bg: rgba(255, 71, 87, 0.12);
  --info: #60A5FA;
  --info-bg: rgba(96, 165, 250, 0.12);

  /* ── 玻璃表面 ── */
  --glass-bg: rgba(255, 255, 255, 0.025);
  --glass-bg-hover: rgba(255, 255, 255, 0.05);
  --glass-bg-active: rgba(255, 255, 255, 0.08);
  --glass-border: rgba(255, 255, 255, 0.06);
  --glass-border-hover: rgba(255, 255, 255, 0.12);
  --glass-blur: saturate(180%) blur(20px);

  /* ── 文字 ── */
  --text-primary: #E8EDF4;
  --text-secondary: #8B95A5;
  --text-muted: #545D6B;
  --text-accent: #FF8E53;

  /* ── 阴影 ── */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
  --shadow-glow-accent: 0 0 30px rgba(255,107,107,0.12);
  --shadow-glow-teal: 0 0 30px rgba(0,214,143,0.1);

  /* ── 圆角 ── */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* ── 间距 ── */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;

  /* ── 过渡 ── */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 0.15s;
  --duration-normal: 0.3s;
  --duration-slow: 0.5s;

  /* ── 字体 ── */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Cascadia Code', 'Fira Code', monospace;
}

/* ═══════════════ 基础重置 ═══════════════ */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-deep);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* 动态网格背景 */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(ellipse 80% 60% at 20% 10%, rgba(255,141,83,0.04) 0%, transparent 70%),
    radial-gradient(ellipse 60% 80% at 80% 90%, rgba(124,58,237,0.03) 0%, transparent 70%),
    radial-gradient(ellipse 50% 50% at 50% 50%, rgba(0,182,212,0.02) 0%, transparent 70%);
  pointer-events: none;
  z-index: -1;
}

/* 网格叠加 */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.015) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: -1;
}

/* ── 滚动条 ── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.08);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.15); }

/* ── 选中 ── */
::selection {
  background: rgba(255,141,83,0.3);
  color: #fff;
}

/* ═══════════════ 链接与排版 ═══════════════ */
a {
  color: var(--accent-2);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}
a:hover { color: var(--accent-1); }

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

/* ═══════════════ 按钮系统 ═══════════════ */
.button, button, .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-family: var(--font-sans);
  font-weight: 500;
  cursor: pointer;
  border: none;
  outline: none;
  transition: all var(--duration-fast) var(--ease-out);
  user-select: none;
  position: relative;
  overflow: hidden;
}

/* 按钮波纹 */
.button::after, .btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(255,255,255,0.2) 0%, transparent 70%);
  opacity: 0;
  transition: opacity var(--duration-fast) var(--ease-out);
}
.button:active::after, .btn:active::after { opacity: 1; }

/* 主要按钮 */
.btn-primary, .button-primary {
  background: var(--gradient-accent);
  color: #fff;
  padding: 10px 24px;
  border-radius: var(--radius-md);
  font-size: 14px;
  box-shadow: 0 2px 12px rgba(255,107,107,0.25);
}
.btn-primary:hover, .button-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(255,107,107,0.35);
}
.btn-primary:active, .button-primary:active {
  transform: translateY(0);
  box-shadow: 0 1px 6px rgba(255,107,107,0.2);
}

/* 次要按钮 */
.btn-secondary, .button-secondary {
  background: var(--glass-bg);
  color: var(--text-primary);
  padding: 10px 24px;
  border-radius: var(--radius-md);
  font-size: 14px;
  border: 1px solid var(--glass-border);
  backdrop-filter: var(--glass-blur);
}
.btn-secondary:hover, .button-secondary:hover {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border-hover);
  transform: translateY(-1px);
}
.btn-secondary:active, .button-secondary:active {
  background: var(--glass-bg-active);
  transform: translateY(0);
}

/* 幽灵按钮 */
.btn-ghost, .button-ghost {
  background: transparent;
  color: var(--text-secondary);
  padding: 8px 16px;
  border-radius: var(--radius-md);
  font-size: 13px;
}
.btn-ghost:hover, .button-ghost:hover {
  background: var(--glass-bg-hover);
  color: var(--text-primary);
}

/* 危险按钮 */
.btn-danger, .button-danger {
  background: var(--error-bg);
  color: var(--error);
  padding: 10px 24px;
  border-radius: var(--radius-md);
  font-size: 14px;
  border: 1px solid rgba(255,71,87,0.2);
}
.btn-danger:hover, .button-danger:hover {
  background: rgba(255,71,87,0.2);
  border-color: rgba(255,71,87,0.35);
}

/* 图标按钮 */
.btn-icon, .button-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-secondary);
  font-size: 18px;
}
.btn-icon:hover, .button-icon:hover {
  background: var(--glass-bg-hover);
  color: var(--text-primary);
}

/* 按钮尺寸变体 */
.btn-sm { padding: 6px 14px; font-size: 12px; border-radius: var(--radius-sm); }
.btn-lg { padding: 14px 32px; font-size: 16px; border-radius: var(--radius-lg); }
.btn-xl { padding: 18px 40px; font-size: 18px; border-radius: var(--radius-xl); }

/* ═══════════════ 输入系统 ═══════════════ */
.form-input, input[type="text"], input[type="email"], input[type="password"],
input[type="number"], input[type="tel"], input[type="url"], input[type="search"],
input[type="date"], textarea, select {
  font-family: var(--font-sans);
  font-size: 14px;
  padding: 10px 14px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  outline: none;
  transition: all var(--duration-fast) var(--ease-out);
  width: 100%;
  backdrop-filter: var(--glass-blur);
}
.form-input::placeholder, input::placeholder, textarea::placeholder {
  color: var(--text-muted);
}
.form-input:hover, input:hover, textarea:hover, select:hover {
  border-color: var(--glass-border-hover);
}
.form-input:focus, input:focus, textarea:focus, select:focus {
  border-color: var(--accent-2);
  box-shadow: 0 0 0 3px rgba(255,141,83,0.1);
  background: var(--glass-bg-hover);
}
.form-input.error, input.error, textarea.error {
  border-color: var(--error);
  box-shadow: 0 0 0 3px rgba(255,71,87,0.1);
}

/* 标签 */
.form-label, label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

/* 表单组 */
.form-group {
  margin-bottom: var(--space-4);
}

/* 开关 */
.toggle {
  position: relative;
  width: 44px;
  height: 24px;
  cursor: pointer;
}
.toggle input { display: none; }
.toggle .track {
  position: absolute;
  inset: 0;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  transition: all var(--duration-fast) var(--ease-out);
}
.toggle .thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  background: var(--text-secondary);
  border-radius: 50%;
  transition: all var(--duration-fast) var(--ease-out);
}
.toggle input:checked + .track {
  background: var(--gradient-accent);
  border-color: transparent;
}
.toggle input:checked + .track .thumb {
  left: 22px;
  background: #fff;
}

/* ═══════════════ 卡片 / 玻璃表面 ═══════════════ */
.card, .glass-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  backdrop-filter: var(--glass-blur);
  transition: all var(--duration-normal) var(--ease-out);
  position: relative;
  overflow: hidden;
}
.card:hover, .glass-card:hover {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border-hover);
  box-shadow: var(--shadow-md), var(--shadow-glow-accent);
  transform: translateY(-2px);
}
.card:active, .glass-card:active {
  transform: translateY(0);
}

/* 高亮卡片 */
.card-accent, .glass-card-accent {
  background: var(--glass-bg);
  border: 1px solid rgba(255,141,83,0.15);
  border-radius: var(--radius-lg);
  backdrop-filter: var(--glass-blur);
  transition: all var(--duration-normal) var(--ease-out);
  box-shadow: var(--shadow-glow-accent);
}
.card-accent:hover, .glass-card-accent:hover {
  border-color: rgba(255,141,83,0.3);
  box-shadow: 0 0 40px rgba(255,107,107,0.2);
  transform: translateY(-2px);
}

/* ═══════════════ 徽章 / 标签 ═══════════════ */
.badge, .tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.02em;
  backdrop-filter: var(--glass-blur);
}
.badge-primary { background: rgba(255,141,83,0.15); color: var(--accent-2); border: 1px solid rgba(255,141,83,0.2); }
.badge-success { background: var(--success-bg); color: var(--success); border: 1px solid rgba(0,214,143,0.2); }
.badge-warning { background: var(--warning-bg); color: var(--warning); border: 1px solid rgba(255,184,0,0.2); }
.badge-error   { background: var(--error-bg); color: var(--error); border: 1px solid rgba(255,71,87,0.2); }
.badge-info    { background: var(--info-bg); color: var(--info); border: 1px solid rgba(96,165,250,0.2); }
.badge-cosmic  { background: rgba(124,58,237,0.12); color: #A78BFA; border: 1px solid rgba(124,58,237,0.2); }

/* ═══════════════ 状态指示器 ═══════════════ */
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}
.status-dot.online  { background: var(--success); box-shadow: 0 0 6px var(--success); }
.status-dot.offline { background: var(--error); }
.status-dot.warning { background: var(--warning); box-shadow: 0 0 6px var(--warning); }
.status-dot.idle    { background: var(--text-muted); }

/* ═══════════════ 导航系统 ═══════════════ */
/* 顶栏 */
[data-theme="dark"] .header,
[data-theme="dark"] .topbar,
[data-theme="dark"] .navbar {
  background: rgba(13,17,23,0.8);
  backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border);
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-6);
  height: 60px;
}

[data-theme="light"] .header,
[data-theme="light"] .topbar,
[data-theme="light"] .navbar {
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid #e5e7eb;
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-6);
  height: 60px;
}

/* 侧边栏 */
[data-theme="dark"] .sidebar {
  background: rgba(10,14,23,0.95);
  backdrop-filter: var(--glass-blur);
  border-right: 1px solid var(--glass-border);
}

[data-theme="light"] .sidebar {
  background: #fff;
  backdrop-filter: none;
  border-right: 1px solid #e5e7eb;
}

/* Tab 导航 */
.tabs {
  display: flex;
  gap: 2px;
  padding: 4px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  backdrop-filter: var(--glass-blur);
}
.tabs button, .tab-item {
  padding: 8px 18px;
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  position: relative;
}
.tabs button:hover, .tab-item:hover {
  color: var(--text-primary);
  background: var(--glass-bg-hover);
}
.tabs button.active, .tab-item.active {
  background: var(--glass-bg-active);
  color: var(--accent-2);
  box-shadow: 0 0 12px rgba(255,141,83,0.1);
}

/* ═══════════════ 表格 ═══════════════ */
table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
}

thead th {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 12px 16px;
  background: rgba(255,255,255,0.02);
  border-bottom: 1px solid var(--glass-border);
  text-align: left;
  position: sticky;
  top: 0;
}

tbody td {
  padding: 14px 16px;
  border-bottom: 1px solid rgba(255,255,255,0.03);
  font-size: 13px;
  color: var(--text-secondary);
  transition: all var(--duration-fast) var(--ease-out);
}

tbody tr:hover td {
  background: rgba(255,255,255,0.02);
  color: var(--text-primary);
}

tbody tr:last-child td {
  border-bottom: none;
}

/* ═══════════════ 模态弹窗 ═══════════════ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-normal) var(--ease-out);
}
.modal-overlay.show, .modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-panel, .modal-content {
  background: var(--bg-elevated);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  max-width: 520px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg), var(--shadow-glow-accent);
  backdrop-filter: var(--glass-blur);
  transform: translateY(20px) scale(0.98);
  transition: all var(--duration-normal) var(--ease-spring);
}
.modal-overlay.show .modal-panel,
.modal-overlay.active .modal-content {
  transform: translateY(0) scale(1);
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 16px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--duration-fast) var(--ease-out);
}
.modal-close:hover {
  background: var(--error-bg);
  color: var(--error);
  border-color: rgba(255,71,87,0.3);
}

/* ═══════════════ 通知 / Toast ═══════════════ */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 300;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  padding: 14px 20px;
  border-radius: var(--radius-md);
  font-size: 13px;
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-md);
  animation: toastSlideIn 0.4s var(--ease-spring);
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 280px;
}
.toast-success { background: rgba(0,214,143,0.1); border-color: rgba(0,214,143,0.25); color: var(--success); }
.toast-error   { background: rgba(255,71,87,0.1); border-color: rgba(255,71,87,0.25); color: var(--error); }
.toast-warning { background: rgba(255,184,0,0.1); border-color: rgba(255,184,0,0.25); color: var(--warning); }
.toast-info    { background: rgba(96,165,250,0.1); border-color: rgba(96,165,250,0.25); color: var(--info); }

@keyframes toastSlideIn {
  from { transform: translateX(100%); opacity: 0; }
  to   { transform: translateX(0); opacity: 1; }
}

/* ═══════════════ 加载骨骼 / Skeleton ═══════════════ */
.skeleton {
  background: linear-gradient(90deg, var(--glass-bg) 0%, var(--glass-bg-hover) 50%, var(--glass-bg) 100%);
  background-size: 200% 100%;
  border-radius: var(--radius-sm);
  animation: skeletonShimmer 1.5s ease-in-out infinite;
}
@keyframes skeletonShimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ═══════════════ 工具提示 ═══════════════ */
.tooltip {
  position: relative;
}
.tooltip::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  padding: 6px 12px;
  background: var(--bg-elevated);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  font-size: 12px;
  color: var(--text-primary);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: all var(--duration-fast) var(--ease-out);
  backdrop-filter: var(--glass-blur);
}
.tooltip:hover::after {
  opacity: 1;
}

/* ═══════════════ 分隔线 ═══════════════ */
.divider, hr {
  border: none;
  height: 1px;
  background: var(--glass-border);
  margin: var(--space-4) 0;
}
.divider-accent {
  height: 1px;
  background: var(--gradient-accent);
  margin: var(--space-4) 0;
  opacity: 0.5;
}

/* ═══════════════ 头像 ═══════════════ */
.avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-weight: 600;
  background: var(--gradient-accent);
  color: #fff;
  flex-shrink: 0;
  position: relative;
}
.avatar-sm { width: 28px; height: 28px; font-size: 12px; }
.avatar-md { width: 40px; height: 40px; font-size: 16px; }
.avatar-lg { width: 56px; height: 56px; font-size: 22px; }
.avatar-xl { width: 80px; height: 80px; font-size: 32px; }
.avatar .status-ring {
  position: absolute;
  bottom: -2px;
  right: -2px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid var(--bg-primary);
}

/* ═══════════════ 进度条 ═══════════════ */
.progress {
  height: 6px;
  background: var(--glass-bg);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.progress-bar {
  height: 100%;
  border-radius: var(--radius-full);
  background: var(--gradient-accent);
  transition: width var(--duration-normal) var(--ease-out);
  position: relative;
}
.progress-bar::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
  animation: progressShine 2s ease-in-out infinite;
}
@keyframes progressShine {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(200%); }
}

/* ═══════════════ 渐入动画 ═══════════════ */
.fade-in          { animation: fadeIn 0.5s var(--ease-out) both; }
.fade-in-up       { animation: fadeInUp 0.5s var(--ease-out) both; }
.fade-in-down     { animation: fadeInDown 0.5s var(--ease-out) both; }
.scale-in         { animation: scaleIn 0.4s var(--ease-spring) both; }
.slide-in-right   { animation: slideInRight 0.4s var(--ease-out) both; }

@keyframes fadeIn       { from { opacity: 0; } to { opacity: 1; } }
@keyframes fadeInUp     { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeInDown   { from { opacity: 0; transform: translateY(-20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes scaleIn      { from { opacity: 0; transform: scale(0.9); } to { opacity: 1; transform: scale(1); } }
@keyframes slideInRight { from { opacity: 0; transform: translateX(30px); } to { opacity: 1; transform: translateX(0); } }

/* 交错动画 */
.stagger > * { animation: fadeInUp 0.5s var(--ease-out) both; }
.stagger > *:nth-child(1) { animation-delay: 0.05s; }
.stagger > *:nth-child(2) { animation-delay: 0.1s; }
.stagger > *:nth-child(3) { animation-delay: 0.15s; }
.stagger > *:nth-child(4) { animation-delay: 0.2s; }
.stagger > *:nth-child(5) { animation-delay: 0.25s; }
.stagger > *:nth-child(6) { animation-delay: 0.3s; }
.stagger > *:nth-child(7) { animation-delay: 0.35s; }
.stagger > *:nth-child(8) { animation-delay: 0.4s; }
.stagger > *:nth-child(n+9) { animation-delay: 0.45s; }

/* ═══════════════ 脉冲 / 呼吸 ═══════════════ */
.pulse {
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* ═══════════════ 光晕效果 ═══════════════ */
.glow-accent {
  box-shadow: 0 0 20px rgba(255,107,107,0.15), inset 0 0 20px rgba(255,107,107,0.05);
}
.glow-teal {
  box-shadow: 0 0 20px rgba(0,214,143,0.15), inset 0 0 20px rgba(0,214,143,0.05);
}

/* ═══════════════ 渐变文字 ═══════════════ */
.text-gradient {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.text-gradient-fire {
  background: var(--gradient-fire);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.text-gradient-ocean {
  background: var(--gradient-ocean);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.text-gradient-cosmic {
  background: var(--gradient-cosmic);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ═══════════════ 布局工具 ═══════════════ */
.flex       { display: flex; }
.flex-col   { display: flex; flex-direction: column; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-wrap  { flex-wrap: wrap; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

.grid { display: grid; }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
.grid-cols-auto { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }

/* ═══════════════ 间距工具 ═══════════════ */
.p-4  { padding: var(--space-4); }
.p-6  { padding: var(--space-6); }
.p-8  { padding: var(--space-8); }
.px-4 { padding-left: var(--space-4); padding-right: var(--space-4); }
.px-6 { padding-left: var(--space-6); padding-right: var(--space-6); }
.py-4 { padding-top: var(--space-4); padding-bottom: var(--space-4); }
.py-6 { padding-top: var(--space-6); padding-bottom: var(--space-6); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }

/* ═══════════════ 文字工具 ═══════════════ */
.text-sm    { font-size: 12px; }
.text-base  { font-size: 14px; }
.text-lg    { font-size: 16px; }
.text-xl    { font-size: 20px; }
.text-2xl   { font-size: 24px; }
.text-3xl   { font-size: 30px; }
.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }
.text-accent { color: var(--text-accent); }
.text-center { text-align: center; }
.font-bold { font-weight: 700; }
.font-mono { font-family: var(--font-mono); }
.truncate  { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ═══════════════ 响应式 ═══════════════ */
@media (max-width: 768px) {
  .grid-cols-2, .grid-cols-3, .grid-cols-4 { grid-template-columns: 1fr; }
  .grid-cols-auto { grid-template-columns: 1fr; }
  .header, .topbar, .navbar { padding: 0 var(--space-4); }
}

/* ═══════════════ 交互反馈 ═══════════════ */
/* 可点击元素的 hover 缩放 */
.clickable { cursor: pointer; transition: transform var(--duration-fast) var(--ease-spring); }
.clickable:hover { transform: scale(1.02); }
.clickable:active { transform: scale(0.98); }

/* 禁用状态 */
.disabled, :disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

/* 焦点环 */
:focus-visible {
  outline: 2px solid var(--accent-2);
  outline-offset: 2px;
}

/* ═══════════════ 代码块 ═══════════════ */
code, pre {
  font-family: var(--font-mono);
  font-size: 13px;
}
pre {
  background: var(--bg-deep);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  overflow-x: auto;
}

/* ═══════════════ 深色 / 浅色主题切换 ═══════════════ */
[data-theme="light"] {
  --bg-deep: #F7FAFC;
  --bg-primary: #FFFFFF;
  --bg-secondary: #F8FAFC;
  --bg-elevated: #FFFFFF;
  --bg-surface: #F1F5F9;

  --glass-bg: rgba(0, 0, 0, 0.02);
  --glass-bg-hover: rgba(0, 0, 0, 0.04);
  --glass-bg-active: rgba(0, 0, 0, 0.06);
  --glass-border: rgba(0, 0, 0, 0.06);
  --glass-border-hover: rgba(0, 0, 0, 0.12);

  --text-primary: #1A202C;
  --text-secondary: #4A5568;
  --text-muted: #A0AEC0;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
  --shadow-glow-accent: 0 0 20px rgba(255,107,107,0.08);
}

[data-theme="light"] body::before,
[data-theme="light"] body::after {
  opacity: 0.4;
}

/* ═══════════════ 分页器 ═══════════════ */
.pagination {
  display: flex;
  align-items: center;
  gap: 4px;
  justify-content: center;
  padding: var(--space-4) 0;
}

.pagination button,
.pagination .page-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 8px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 13px;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  backdrop-filter: var(--glass-blur);
}

.pagination button:hover:not(:disabled):not(.active),
.pagination .page-btn:hover:not(:disabled):not(.active) {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border-hover);
  color: var(--text-primary);
}

.pagination button.active,
.pagination .page-btn.active {
  background: var(--gradient-accent);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 2px 8px rgba(255,107,107,0.3);
}

.pagination button:disabled,
.pagination .page-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.pagination .page-info {
  font-size: 12px;
  color: var(--text-muted);
  padding: 0 8px;
}

/* 紧凑分页 */
.pagination-sm button,
.pagination-sm .page-btn {
  min-width: 28px;
  height: 28px;
  font-size: 11px;
  border-radius: var(--radius-xs);
}

/* ═══════════════ 下拉菜单 ═══════════════ */
.dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  min-width: 180px;
  padding: 6px;
  background: var(--bg-elevated);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  backdrop-filter: var(--glass-blur);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px) scale(0.96);
  transition: all var(--duration-fast) var(--ease-out);
  z-index: 150;
  list-style: none;
}

.dropdown-menu.show,
.dropdown.open .dropdown-menu,
.dropdown:hover .dropdown-menu,
.dropdown:focus-within .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  font-family: var(--font-sans);
}

.dropdown-item:hover {
  background: var(--glass-bg-hover);
  color: var(--text-primary);
}

.dropdown-item.danger {
  color: var(--error);
}

.dropdown-item.danger:hover {
  background: var(--error-bg);
}

.dropdown-divider {
  height: 1px;
  background: var(--glass-border);
  margin: 4px 8px;
}

/* 左对齐变体 */
.dropdown-left .dropdown-menu {
  right: auto;
  left: 0;
}

/* ═══════════════ 空状态 ═══════════════ */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 24px;
  text-align: center;
}

.empty-state .empty-icon {
  font-size: 48px;
  margin-bottom: 16px;
  opacity: 0.3;
  filter: grayscale(0.5);
}

.empty-state .empty-icon.glass-icon {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: var(--glass-blur);
}

.empty-state h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.empty-state p {
  font-size: 13px;
  color: var(--text-muted);
  max-width: 320px;
  line-height: 1.6;
  margin-bottom: 20px;
}

.empty-state .empty-action {
  margin-top: 8px;
}

/* 紧凑空状态 */
.empty-state-sm {
  padding: 32px 20px;
}

.empty-state-sm .empty-icon {
  font-size: 32px;
  margin-bottom: 10px;
}

/* ═══════════════ 加载指示器 ═══════════════ */
.spinner {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.spinner::after {
  content: '';
  width: 20px;
  height: 20px;
  border: 2px solid var(--glass-border);
  border-top-color: var(--accent-2);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

.spinner-sm::after {
  width: 14px;
  height: 14px;
  border-width: 1.5px;
}

.spinner-lg::after {
  width: 32px;
  height: 32px;
  border-width: 3px;
}

.spinner-white::after {
  border-color: rgba(255,255,255,0.2);
  border-top-color: #fff;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* 三点跳动加载 */
.dots-loader {
  display: inline-flex;
  gap: 4px;
  align-items: center;
}

.dots-loader span {
  width: 6px;
  height: 6px;
  background: var(--accent-2);
  border-radius: 50%;
  animation: dotBounce 1.2s ease-in-out infinite;
}

.dots-loader span:nth-child(2) { animation-delay: 0.15s; }
.dots-loader span:nth-child(3) { animation-delay: 0.3s; }

@keyframes dotBounce {
  0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
  40% { transform: scale(1); opacity: 1; }
}

/* 全屏加载覆盖 */
.loading-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(8,12,20,0.6);
  backdrop-filter: blur(4px);
  z-index: 50;
  border-radius: inherit;
}

/* ═══════════════ 复选框 & 单选框 ═══════════════ */
.checkbox-wrap,
.radio-wrap {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 13px;
  color: var(--text-secondary);
  user-select: none;
  transition: color var(--duration-fast) var(--ease-out);
}

.checkbox-wrap:hover,
.radio-wrap:hover {
  color: var(--text-primary);
}

.checkbox-wrap input,
.radio-wrap input {
  display: none;
}

.checkbox-wrap .check-mark {
  width: 18px;
  height: 18px;
  border: 1.5px solid var(--glass-border-hover);
  border-radius: var(--radius-xs);
  background: var(--glass-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--duration-fast) var(--ease-out);
  flex-shrink: 0;
}

.checkbox-wrap input:checked + .check-mark {
  background: var(--gradient-accent);
  border-color: transparent;
}

.checkbox-wrap input:checked + .check-mark::after {
  content: '✓';
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  line-height: 1;
}

.radio-wrap .radio-mark {
  width: 18px;
  height: 18px;
  border: 1.5px solid var(--glass-border-hover);
  border-radius: 50%;
  background: var(--glass-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--duration-fast) var(--ease-out);
  flex-shrink: 0;
}

.radio-wrap input:checked + .radio-mark {
  border-color: var(--accent-2);
}

.radio-wrap input:checked + .radio-mark::after {
  content: '';
  width: 10px;
  height: 10px;
  background: var(--gradient-accent);
  border-radius: 50%;
}

/* ═══════════════ 面包屑 ═══════════════ */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  flex-wrap: wrap;
}

.breadcrumb a,
.breadcrumb .crumb-link {
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
  cursor: pointer;
}

.breadcrumb a:hover,
.breadcrumb .crumb-link:hover {
  color: var(--accent-2);
}

.breadcrumb .crumb-sep {
  color: var(--text-muted);
  font-size: 10px;
  pointer-events: none;
  opacity: 0.5;
}

.breadcrumb .crumb-current {
  color: var(--text-primary);
  font-weight: 500;
  pointer-events: none;
}

/* ═══════════════ 搜索输入框 ═══════════════ */
.search-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.search-input-wrap .search-icon {
  position: absolute;
  left: 12px;
  font-size: 15px;
  color: var(--text-muted);
  pointer-events: none;
  transition: color var(--duration-fast) var(--ease-out);
}

.search-input-wrap input {
  padding-left: 36px;
  padding-right: 36px;
}

.search-input-wrap input:focus + .search-icon,
.search-input-wrap input:focus ~ .search-icon {
  color: var(--accent-2);
}

.search-input-wrap .search-clear {
  position: absolute;
  right: 8px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: none;
  background: var(--glass-bg);
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  opacity: 0;
  transform: scale(0.8);
  transition: all var(--duration-fast) var(--ease-out);
}

.search-input-wrap input:not(:placeholder-shown) ~ .search-clear {
  opacity: 1;
  transform: scale(1);
}

.search-input-wrap .search-clear:hover {
  background: var(--error-bg);
  color: var(--error);
}

.search-input-wrap .search-shortcut {
  position: absolute;
  right: 10px;
  font-size: 10px;
  padding: 2px 6px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xs);
  color: var(--text-muted);
  pointer-events: none;
  font-family: var(--font-mono);
}

/* ═══════════════ 表格增强 ═══════════════ */

/* 斑马纹 */
.table-striped tbody tr:nth-child(even) td {
  background: rgba(255,255,255,0.015);
}

/* 紧凑表格 */
.table-compact thead th {
  padding: 8px 12px;
  font-size: 10px;
}

.table-compact tbody td {
  padding: 8px 12px;
  font-size: 12px;
}

/* 可排序表头 */
th.sortable {
  cursor: pointer;
  user-select: none;
  transition: color var(--duration-fast) var(--ease-out);
}

th.sortable:hover {
  color: var(--accent-2);
}

th.sortable .sort-arrow {
  display: inline-block;
  margin-left: 4px;
  font-size: 9px;
  opacity: 0.4;
  transition: all var(--duration-fast) var(--ease-out);
}

th.sortable.sorted .sort-arrow {
  opacity: 1;
  color: var(--accent-2);
}

th.sortable.sorted-asc .sort-arrow {
  transform: rotate(0deg);
}

th.sortable.sorted-desc .sort-arrow {
  transform: rotate(180deg);
}

/* 表格容器（带圆角边框） */
.table-container {
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  backdrop-filter: var(--glass-blur);
}

.table-container table {
  margin: -1px;
}

/* 表格行选中状态 */
tbody tr.selected td {
  background: rgba(255,141,83,0.08) !important;
  box-shadow: inset 3px 0 0 var(--accent-2);
}

/* ═══════════════ 选择芯片 ═══════════════ */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 14px;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  font-size: 12px;
  color: var(--text-secondary);
  background: var(--glass-bg);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  backdrop-filter: var(--glass-blur);
  font-family: var(--font-sans);
}

.chip:hover {
  border-color: var(--glass-border-hover);
  background: var(--glass-bg-hover);
  color: var(--text-primary);
}

.chip.active,
.chip.selected {
  background: rgba(255,141,83,0.12);
  border-color: rgba(255,141,83,0.3);
  color: var(--accent-2);
}

.chip .chip-close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: none;
  background: rgba(255,255,255,0.1);
  color: inherit;
  cursor: pointer;
  font-size: 10px;
  margin-left: 2px;
  transition: all var(--duration-fast) var(--ease-out);
}

.chip .chip-close:hover {
  background: var(--error-bg);
  color: var(--error);
}

.chip-group {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

/* 彩色芯片 */
.chip-accent  { border-color: rgba(255,107,107,0.2); color: var(--accent-1); }
.chip-success { border-color: rgba(0,214,143,0.2); color: var(--success); }
.chip-warning { border-color: rgba(255,184,0,0.2); color: var(--warning); }
.chip-info    { border-color: rgba(96,165,250,0.2); color: var(--info); }
.chip-cosmic  { border-color: rgba(124,58,237,0.2); color: #A78BFA; }

/* ═══════════════ 步骤条 ═══════════════ */
.stepper {
  display: flex;
  align-items: center;
  gap: 0;
}

.stepper .step {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  position: relative;
}

.stepper .step:not(:last-child)::after {
  content: '';
  flex: 1;
  height: 2px;
  background: var(--glass-border);
  margin: 0 12px;
  transition: background var(--duration-normal) var(--ease-out);
}

.stepper .step.completed:not(:last-child)::after {
  background: var(--gradient-accent);
}

.stepper .step-circle {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
  background: var(--glass-bg);
  border: 2px solid var(--glass-border);
  color: var(--text-muted);
  flex-shrink: 0;
  transition: all var(--duration-normal) var(--ease-out);
}

.stepper .step.active .step-circle {
  background: var(--gradient-accent);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 0 16px rgba(255,107,107,0.3);
}

.stepper .step.completed .step-circle {
  background: var(--success);
  border-color: transparent;
  color: #fff;
}

.stepper .step-label {
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap;
  transition: color var(--duration-fast) var(--ease-out);
}

.stepper .step.active .step-label {
  color: var(--accent-2);
  font-weight: 600;
}

.stepper .step.completed .step-label {
  color: var(--success);
}

/* 垂直步骤条 */
.stepper-vertical {
  flex-direction: column;
  align-items: flex-start;
  gap: 0;
}

.stepper-vertical .step {
  flex-direction: row;
  gap: 12px;
  width: 100%;
}

.stepper-vertical .step:not(:last-child)::after {
  content: '';
  position: absolute;
  left: 15px;
  top: 36px;
  width: 2px;
  height: calc(100% - 20px);
  background: var(--glass-border);
  margin: 0;
}

.stepper-vertical .step:not(:last-child) {
  padding-bottom: 24px;
}

.stepper-vertical .step-content {
  padding-top: 4px;
}

.stepper-vertical .step-content h4 {
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 2px;
}

.stepper-vertical .step-content p {
  font-size: 12px;
  color: var(--text-muted);
}

/* ═══════════════ 统计卡片增强 ═══════════════ */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.stat-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  backdrop-filter: var(--glass-blur);
  transition: all var(--duration-normal) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.stat-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-out);
}

.stat-card:hover {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.stat-card:hover::after {
  opacity: 1;
}

.stat-card .stat-icon {
  font-size: 28px;
  margin-bottom: 10px;
}

.stat-card .stat-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.1;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  letter-spacing: -0.02em;
}

.stat-card .stat-label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.stat-card .stat-change {
  font-size: 11px;
  margin-top: 4px;
}

.stat-card .stat-change.up   { color: var(--success); }
.stat-card .stat-change.down { color: var(--error); }

/* 统计卡片颜色变体 */
.stat-accent .stat-value  { color: var(--accent-2); }
.stat-accent::after       { background: var(--gradient-accent); }
.stat-success .stat-value { color: var(--success); }
.stat-success::after      { background: var(--gradient-ocean); }
.stat-warning .stat-value { color: var(--warning); }
.stat-warning::after      { background: var(--gradient-warm); }
.stat-cosmic .stat-value  { color: #A78BFA; }
.stat-cosmic::after       { background: var(--gradient-cosmic); }

/* ═══════════════ 信息提示框 ═══════════════ */
.alert {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  font-size: 13px;
  border: 1px solid;
  backdrop-filter: var(--glass-blur);
  line-height: 1.5;
}

.alert .alert-icon {
  font-size: 18px;
  flex-shrink: 0;
  margin-top: 1px;
}

.alert-info {
  background: var(--info-bg);
  border-color: rgba(96,165,250,0.25);
  color: var(--info);
}

.alert-success {
  background: var(--success-bg);
  border-color: rgba(0,214,143,0.25);
  color: var(--success);
}

.alert-warning {
  background: var(--warning-bg);
  border-color: rgba(255,184,0,0.25);
  color: var(--warning);
}

.alert-error {
  background: var(--error-bg);
  border-color: rgba(255,71,87,0.25);
  color: var(--error);
}

/* ═══════════════ 输入组 / 组合框 ═══════════════ */
.input-group {
  display: flex;
  align-items: stretch;
}

.input-group input,
.input-group select {
  border-radius: 0;
  flex: 1;
  min-width: 0;
}

.input-group input:first-child,
.input-group select:first-child {
  border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.input-group input:last-child,
.input-group select:last-child {
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.input-group input:only-child {
  border-radius: var(--radius-md);
}

.input-group .input-addon {
  display: flex;
  align-items: center;
  padding: 10px 14px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  font-size: 13px;
  color: var(--text-muted);
  white-space: nowrap;
}

.input-group .input-addon:first-child {
  border-radius: var(--radius-md) 0 0 var(--radius-md);
  border-right: none;
}

.input-group .input-addon:last-child {
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  border-left: none;
}

/* ═══════════════ 拖拽手柄 ═══════════════ */
.drag-handle {
  cursor: grab;
  color: var(--text-muted);
  padding: 4px;
  display: inline-flex;
  align-items: center;
  transition: color var(--duration-fast) var(--ease-out);
}

.drag-handle:hover {
  color: var(--text-secondary);
}

.drag-handle:active {
  cursor: grabbing;
}

/* ═══════════════ 快捷键提示 ═══════════════ */
kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 22px;
  height: 22px;
  padding: 0 5px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-bottom-width: 2px;
  border-radius: var(--radius-xs);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-secondary);
  line-height: 1;
  backdrop-filter: var(--glass-blur);
}

/* ═══════════════ 高级动效系统 ═══════════════ */

/* 闪烁扫光 — 卡片/按钮顶部扫过一道光 */
.shimmer {
  position: relative;
  overflow: hidden;
}

.shimmer::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255,255,255,0.04),
    rgba(255,255,255,0.08),
    rgba(255,255,255,0.04),
    transparent
  );
  transform: skewX(-15deg);
  animation: shimmerSweep 2.5s ease-in-out infinite;
}

@keyframes shimmerSweep {
  0%   { left: -100%; }
  100% { left: 200%; }
}

/* 光晕脉冲 — 柔和的光晕呼吸 */
.glow-pulse {
  animation: glowPulse 3s ease-in-out infinite;
}

@keyframes glowPulse {
  0%, 100% { box-shadow: 0 0 8px rgba(255,107,107,0.1); }
  50%      { box-shadow: 0 0 24px rgba(255,107,107,0.2); }
}

/* 边框流光 — 聚焦时边框发光流动 */
.border-glow {
  transition: border-color var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out);
}

.border-glow:focus-within,
.border-glow:focus {
  border-color: var(--accent-2);
  box-shadow:
    0 0 0 2px rgba(255,141,83,0.1),
    0 0 0 6px rgba(255,141,83,0.04);
}

/* 卡片悬浮抬升 */
.card-lift {
  transition: all var(--duration-normal) var(--ease-spring);
}

.card-lift:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* 数字滚动动画容器 */
.count-up {
  display: inline-block;
  font-variant-numeric: tabular-nums;
}

/* 弹入 — 从下方弹入 */
.bounce-in {
  animation: bounceIn 0.6s var(--ease-spring) both;
}

@keyframes bounceIn {
  0%   { opacity: 0; transform: scale(0.3); }
  50%  { opacity: 1; transform: scale(1.05); }
  70%  { transform: scale(0.95); }
  100% { transform: scale(1); }
}

/* 弹出 — 强调入场 */
.pop-in {
  animation: popIn 0.35s var(--ease-spring) both;
}

@keyframes popIn {
  0%   { opacity: 0; transform: scale(0.5); }
  100% { opacity: 1; transform: scale(1); }
}

/* 旋转入场 */
.rotate-in {
  animation: rotateIn 0.5s var(--ease-out) both;
}

@keyframes rotateIn {
  0%   { opacity: 0; transform: rotate(-10deg) scale(0.9); }
  100% { opacity: 1; transform: rotate(0) scale(1); }
}

/* 摇晃 — 错误/警告反馈 */
.shake {
  animation: shake 0.4s ease-in-out;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  10%, 50%, 90% { transform: translateX(-4px); }
  30%, 70% { transform: translateX(4px); }
}

/* 涟漪扩散 — 点击反馈 */
.ripple {
  position: relative;
  overflow: hidden;
}

.ripple .ripple-effect {
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,0.3);
  transform: scale(0);
  animation: rippleExpand 0.6s ease-out;
  pointer-events: none;
}

@keyframes rippleExpand {
  to { transform: scale(4); opacity: 0; }
}

/* 打字机光标闪烁 */
.cursor-blink::after {
  content: '|';
  animation: cursorBlink 0.8s step-end infinite;
  color: var(--accent-2);
  font-weight: 100;
}

@keyframes cursorBlink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* 浮动动画 — 元素微微上下浮动 */
.float {
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

/* 入场延迟工具类 */
.delay-50  { animation-delay: 0.05s; }
.delay-100 { animation-delay: 0.1s; }
.delay-150 { animation-delay: 0.15s; }
.delay-200 { animation-delay: 0.2s; }
.delay-300 { animation-delay: 0.3s; }
.delay-500 { animation-delay: 0.5s; }

/* 减速动效偏好适配 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ═══════════════ 响应式增强 ═══════════════ */
@media (max-width: 640px) {
  .stat-grid {
    grid-template-columns: 1fr;
  }

  .stepper .step-label {
    display: none;
  }

  .stepper .step:not(:last-child)::after {
    margin: 0 6px;
  }

  .pagination button:not(.prev):not(.next):not(.active) {
    display: none;
  }
}