/* 现代轻奢 · 浅色毛玻璃主题 · 动态高级背景版 */
:root {
  --primary: #4169ff;
  --purple: #7c5fff;
  --light: #f8faff;
  --card: rgba(255, 255, 255, 0.88);
  --glass: rgba(255, 255, 255, 0.75);
  --border: rgba(0, 30, 100, 0.07);
  --text: #1f2937;
  --muted: #6b7280;
  --success: #00c48c;
  --danger: #ff4d6d;
  --radius: 20px;
  --shadow: 0 8px 30px rgba(0, 20, 80, 0.06);
  --shadow-hover: 0 12px 36px rgba(0, 20, 80, 0.1);
  --blur: blur(22px) saturate(1.6);
  --transition: all 0.32s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--light);
  color: var(--text);
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  line-height: 1.5;
}

/* 多层动态高级背景 彻底告别单调 */
.page-bg {
  position: fixed;
  inset: 0;
  /* 双层渐变 + 流动动画 */
  background: 
    radial-gradient(circle at 15% 25%, rgba(65, 105, 255, 0.08), transparent 50%),
    radial-gradient(circle at 85% 75%, rgba(124, 95, 255, 0.08), transparent 50%),
    radial-gradient(circle at 50% 50%, rgba(80, 227, 255, 0.05), transparent 60%);
  background-size: 120% 120%;
  z-index: -1;
  animation: bgFlow 18s ease-in-out infinite alternate;
}

/* 缓慢流动背景动画 */
@keyframes bgFlow {
  0% {
    background-position: 0% 0%;
  }
  100% {
    background-position: 10% 10%;
  }
}

/* 毛玻璃卡片 */
.glass-card {
  background: var(--glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  transition: var(--transition);
}
.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(65, 105, 255, 0.12);
}

/* 渐变标题 */
.gradient-text {
  background: linear-gradient(90deg, #4169ff, #7c5fff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 700;
}

/* 导航 */
.glass-nav {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border);
  padding: 18px 20px;
  position: sticky;
  top: 0;
  z-index: 99;
}
.nav-wrap {
  max-width: 1000px;
  margin: 0 auto;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}
.nav-wrap a {
  color: var(--text);
  text-decoration: none;
  padding: 10px 14px;
  border-radius: 14px;
  font-weight: 500;
  transition: var(--transition);
}
.nav-wrap a:hover {
  background: rgba(65, 105, 255, 0.1);
  color: var(--primary);
}

/* 按钮系统 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: none;
  border-radius: 14px;
  padding: 13px 20px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(90deg, #4169ff, #7c5fff);
  color: #fff;
  box-shadow: 0 4px 16px rgba(65, 105, 255, 0.25);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(65, 105, 255, 0.3);
}
.btn-secondary {
  background: rgba(65, 105, 255, 0.1);
  color: var(--primary);
}
.btn-danger {
  background: rgba(255, 77, 109, 0.1);
  color: var(--danger);
}
.btn-success {
  background: rgba(0, 196, 140, 0.1);
  color: var(--success);
}
.btn-sm {
  padding: 8px 12px;
  font-size: 13px;
  border-radius: 10px;
}

/* 表单 */
input, select, textarea {
  width: 100%;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px 16px;
  font-size: 15px;
  color: var(--text);
  transition: var(--transition);
  outline: none;
}
input:focus, select:focus, textarea:focus {
  border-color: rgba(65, 105, 255, 0.2);
  box-shadow: 0 0 0 4px rgba(65, 105, 255, 0.1);
  background: #fff;
}
textarea {
  resize: vertical;
  min-height: 120px;
  font-family: monospace;
}

/* 布局 */
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 30px 20px;
}
.center-page {
  display: grid;
  place-items: center;
  min-height: 100vh;
  padding: 20px;
}
.w-400 { max-width: 400px; width: 100%; }
.w-full { width: 100%; }
.text-center { text-align: center; }

/* 间距 */
.mt-10 { margin-top: 10px; }
.mt-15 { margin-top: 15px; }
.mt-20 { margin-top: 20px; }
.mb-10 { margin-bottom: 10px; }
.mb-15 { margin-bottom: 15px; }
.mb-20 { margin-bottom: 20px; }
.mb-25 { margin-bottom: 25px; }
.gap-10 { gap: 10px; }
.gap-15 { gap: 15px; }
.flex { display: flex; align-items: center; }
.flex-col { display: flex; flex-direction: column; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }

/* 提示 */
.alert {
  padding: 14px 18px;
  border-radius: 14px;
  margin-bottom: 20px;
  font-weight: 500;
  backdrop-filter: blur(10px);
}
.alert-success {
  background: rgba(0, 196, 140, 0.1);
  color: #008c6a;
  border: 1px solid rgba(0, 196, 140, 0.15);
}
.alert-error {
  background: rgba(255, 77, 109, 0.1);
  color: #b91c3c;
  border: 1px solid rgba(255, 77, 109, 0.15);
}

/* 表格 */
.table-box {
  background: var(--card);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow);
}
table {
  width: 100%;
  border-collapse: collapse;
}
th, td {
  padding: 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
th {
  background: rgba(65, 105, 255, 0.05);
  color: var(--primary);
  font-weight: 600;
}
tr:last-child td {
  border-bottom: none;
}

/* 悬浮动效 */
.float {
  animation: float 7s ease-in-out infinite;
}
@keyframes float {
  0%,100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* 统计卡片 */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-bottom: 20px;
}
.stat-card {
  background: var(--card);
  border-radius: 16px;
  padding: 20px;
  box-shadow: var(--shadow);
}
.stat-card h3 {
  font-size: 24px;
  margin: 5px 0;
  color: var(--primary);
}
.stat-card p {
  color: var(--muted);
  font-size: 14px;
}

/* 订阅链接 */
.sub-row {
  display: flex;
  gap: 12px;
  align-items: center;
  margin: 16px 0;
}
.sub-input {
  flex: 1;
}

/* 响应式 */
@media (max-width: 640px) {
  .stats-grid { grid-template-columns: 1fr; }
  .sub-row { flex-direction: column; align-items: stretch; }
  .nav-wrap a { padding: 8px 10px; font-size: 14px; }
}