:root {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.88);
  --bg-card-hover: #ffffff;
  --border-color: rgba(226, 232, 240, 0.9);
  --border-glow: rgba(2, 132, 199, 0.25);
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;

  --accent-cyan: #0284c7;
  --accent-blue: #2563eb;
  --accent-indigo: #4f46e5;
  --accent-purple: #7c3aed;
  --accent-emerald: #059669;
  --accent-rose: #e11d48;

  --gradient-brand: linear-gradient(135deg, #0284c7 0%, #2563eb 50%, #4f46e5 100%);
  --gradient-card: linear-gradient(180deg, rgba(255, 255, 255, 0.9) 0%, rgba(248, 250, 252, 0.9) 100%);
  --shadow-glow: 0 0 25px -4px rgba(2, 132, 199, 0.18);
  --shadow-card: 0 4px 20px -2px rgba(15, 23, 42, 0.05), 0 2px 6px -1px rgba(15, 23, 42, 0.03);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --transition-smooth: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.5;
  overflow-x: hidden;
  position: relative;
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(2, 132, 199, 0.04) 0%, transparent 40%),
    radial-gradient(circle at 85% 75%, rgba(99, 102, 241, 0.04) 0%, transparent 45%);
  background-attachment: fixed;
}

/* 顶部流光背景粒子效果 */
.bg-ambient {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.4;
}

/* 顶栏 Header */
.app-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid var(--border-color);
  padding: 0.85rem 1.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.brand-icon {
  width: 36px;
  height: 36px;
  background: var(--gradient-brand);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(2, 132, 199, 0.25);
}

.brand-icon svg {
  width: 20px;
  height: 20px;
  color: #fff;
}

.brand-title {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #0f172a;
}

.brand-badge {
  font-size: 0.7rem;
  padding: 2px 8px;
  background: rgba(2, 132, 199, 0.08);
  color: var(--accent-cyan);
  border: 1px solid rgba(2, 132, 199, 0.2);
  border-radius: var(--radius-full);
  font-weight: 600;
}

/* 用户状态区域 */
.user-menu {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.user-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  background: #f1f5f9;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  color: #334155;
}

.user-avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: linear-gradient(135deg, #0284c7, #38bdf8);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 600;
  color: #ffffff;
}

.admin-tag {
  background: rgba(245, 158, 11, 0.12);
  color: #b45309;
  font-size: 0.7rem;
  padding: 1px 6px;
  border-radius: 4px;
  border: 1px solid rgba(245, 158, 11, 0.25);
  font-weight: 600;
}

/* 按钮规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition-smooth);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
  color: #ffffff;
  border: none;
  box-shadow: 0 4px 12px rgba(2, 132, 199, 0.25);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(2, 132, 199, 0.35);
  filter: brightness(1.05);
}

.btn-outline {
  background: #ffffff;
  color: #334155;
  border: 1px solid #cbd5e1;
}

.btn-outline:hover {
  background: #f8fafc;
  color: #0f172a;
  border-color: #94a3b8;
}

.btn-danger {
  background: rgba(244, 63, 94, 0.08);
  color: #e11d48;
  border: 1px solid rgba(244, 63, 94, 0.25);
}

.btn-danger:hover {
  background: rgba(244, 63, 94, 0.16);
}

/* 主容器 */
.main-container {
  position: relative;
  z-index: 10;
  max-width: 1200px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

/* 欢迎 Hero */
.hero-section {
  text-align: center;
  margin-bottom: 3.5rem;
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 0.75rem;
  color: #0f172a;
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* 应用网格布局 */
.apps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.75rem;
}

/* 单个应用卡片 */
.app-card {
  position: relative;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition-smooth);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.app-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-brand);
  opacity: 0;
  transition: var(--transition-smooth);
}

.app-card:hover {
  transform: translateY(-4px);
  background: var(--bg-card-hover);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow), var(--shadow-card);
}

.app-card:hover::before {
  opacity: 1;
}

.card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.card-icon-box {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-md);
  background: rgba(2, 132, 199, 0.08);
  border: 1px solid rgba(2, 132, 199, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
}

.card-icon-box svg {
  width: 26px;
  height: 26px;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.75rem;
  color: var(--accent-emerald);
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
  box-shadow: 0 0 8px var(--accent-emerald);
}

.card-body {
  margin-bottom: 1.5rem;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: #0f172a;
  margin-bottom: 0.45rem;
}

.card-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.55;
  min-height: 42px;
}

.card-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

.app-link-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1rem;
  background: rgba(2, 132, 199, 0.08);
  color: #0284c7;
  border: 1px solid rgba(2, 132, 199, 0.2);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition-smooth);
}

.app-link-btn:hover {
  background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 14px rgba(2, 132, 199, 0.25);
}

/* =============================================================
   清爽简约的白透毛玻璃登录卡片（宽大于高，告别繁冗）
   ============================================================= */
.clean-login-card {
  max-width: 480px;
  width: 90%;
  margin: 3.5rem auto;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(28px) saturate(180%);
  -webkit-backdrop-filter: blur(28px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: 22px;
  padding: 2.2rem 2.4rem 2.4rem;
  box-shadow: 0 25px 50px -12px rgba(15, 23, 42, 0.22), 0 0 0 1px rgba(255, 255, 255, 0.6) inset;
  position: relative;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.clean-card-header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  margin-bottom: 1.6rem;
}

.clean-card-icon {
  width: 34px;
  height: 34px;
  background: linear-gradient(135deg, #0284c7 0%, #38bdf8 100%);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(2, 132, 199, 0.35);
  margin: 0;
  flex-shrink: 0;
}

.clean-card-icon img,
.clean-card-icon svg {
  width: 18px;
  height: 18px;
  color: #ffffff;
  display: block;
}

.clean-card-title {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 700;
  color: #0f172a;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.clean-group {
  margin-bottom: 1.25rem;
}

.clean-group .form-label {
  display: block;
  font-size: 0.825rem;
  font-weight: 600;
  color: #334155;
  margin-bottom: 0.45rem;
}

/* 输入框与图标精确布局 */
.input-box {
  position: relative;
  width: 100%;
  display: block;
}

.input-prefix-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: #94a3b8;
  pointer-events: none;
  z-index: 2;
}

.form-input {
  width: 100%;
  box-sizing: border-box;
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(203, 213, 225, 0.85);
  border-radius: 12px;
  padding: 0.8rem 3.4rem 0.8rem 2.65rem;
  color: #0f172a;
  font-size: 0.95rem;
  font-weight: 500;
  outline: none;
  box-shadow: inset 0 2px 4px rgba(15, 23, 42, 0.02);
  transition: all 0.2s ease;
}

.form-input::placeholder {
  color: #94a3b8;
  font-weight: 400;
}

.form-input:focus {
  background: #ffffff;
  border-color: #0284c7;
  box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.16);
}

/* 密码显示/隐藏按钮：绝对定位、内嵌右侧、垂直居中、高 z-index、防事件穿透 */
.pwd-toggle-btn {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  background: transparent;
  border: none;
  color: #64748b;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  border-radius: 6px;
  transition: all 0.2s ease;
  z-index: 20;
  outline: none;
}

.pwd-toggle-btn:hover {
  color: #0284c7;
  background: rgba(2, 132, 199, 0.1);
}

.pwd-toggle-btn svg,
.pwd-toggle-btn svg path {
  width: 19px;
  height: 19px;
  pointer-events: none;
}

.clean-submit-btn {
  width: 100%;
  margin-top: 1.25rem;
  padding: 0.85rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 12px;
  background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
  color: #ffffff;
  border: none;
  box-shadow: 0 8px 20px -4px rgba(2, 132, 199, 0.4);
  cursor: pointer;
  transition: all 0.25s ease;
  letter-spacing: 0.02em;
}

.clean-submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 25px -4px rgba(2, 132, 199, 0.5);
  filter: brightness(1.05);
}

.clean-submit-btn:active {
  transform: translateY(0);
}

.form-hint {
  font-size: 0.775rem;
  color: #64748b;
  margin-top: 0.4rem;
}

.alert-box {
  padding: 0.75rem 1rem;
  border-radius: 10px;
  font-size: 0.85rem;
  margin-bottom: 1.25rem;
  display: none;
}

.alert-error {
  background: rgba(254, 226, 226, 0.95);
  border: 1px solid #fca5a5;
  color: #991b1b;
  font-weight: 500;
}

.alert-success {
  background: rgba(236, 253, 245, 0.95);
  border: 1px solid #a7f3d0;
  color: #065f46;
}

/* 旋转加载动效 */
@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* 动效抖动 */
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-6px); }
  40%, 80% { transform: translateX(6px); }
}

.shake {
  animation: shake 0.4s ease-in-out;
}

/* 底部 Footer */
.app-footer {
  text-align: center;
  padding: 2.5rem 1.5rem;
  color: var(--text-muted);
  font-size: 0.8rem;
  border-top: 1px solid var(--border-color);
  margin-top: 4rem;
}

/* 响应式调整 */
@media (max-width: 640px) {
  .clean-login-card {
    padding: 1.8rem 1.4rem 2rem;
    margin: 2rem auto;
    width: 92%;
  }
  .hero-title {
    font-size: 2rem;
  }
  .apps-grid {
    grid-template-columns: 1fr;
  }
}