/* ============================================
   AI音乐创作平台 - Apple极简科技风格 v3.0
   包含：Light Mode + Dark Mode + 自动切换
   ============================================ */

/* ============================================
   1. 基础设计令牌 (Design Tokens)
   ============================================ */
:root {
  /* 颜色系统 - 语义化命名 */
  --color-bg-primary: #ffffff;
  --color-bg-secondary: #f5f5f7;
  --color-bg-tertiary: #fafafa;
  --color-bg-elevated: #ffffff;
  
  --color-text-primary: #1d1d1f;
  --color-text-secondary: #86868b;
  --color-text-tertiary: #a1a1a6;
  --color-text-inverse: #ffffff;
  
  --color-accent: #0071e3;
  --color-accent-hover: #0077ed;
  --color-accent-light: rgba(0, 113, 227, 0.1);
  
  --color-success: #34c759;
  --color-warning: #ff9500;
  --color-danger: #ff3b30;
  
  --color-border: rgba(0, 0, 0, 0.08);
  --color-border-hover: rgba(0, 0, 0, 0.15);
  --color-separator: rgba(0, 0, 0, 0.06);
  
  /* 阴影系统 - 极淡 */
  --shadow-none: none;
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.03);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.05), 0 2px 4px rgba(0, 0, 0, 0.02);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08), 0 4px 8px rgba(0, 0, 0, 0.03);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.12);
  
  /* 圆角系统 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-2xl: 24px;
  --radius-full: 9999px;
  
  /* 动画曲线 */
  --ease-linear: linear;
  --ease-smooth: cubic-bezier(0.4, 0.0, 0.2, 1);
  --ease-out: cubic-bezier(0.0, 0.0, 0.2, 1);
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  
  /* 过渡时间 */
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 350ms;
  --duration-slower: 500ms;
  
  /* 字体 */
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", SFMono-Regular, ui-monospace, Menlo, Monaco, Consolas, monospace;
  
  /* 字体大小 */
  --text-xs: 0.75rem;     /* 12px */
  --text-sm: 0.8125rem;   /* 13px */
  --text-base: 0.9375rem; /* 15px */
  --text-lg: 1.0625rem;   /* 17px */
  --text-xl: 1.25rem;     /* 20px */
  --text-2xl: 1.5rem;     /* 24px */
  --text-3xl: 1.75rem;    /* 28px */
  --text-4xl: 2.5rem;     /* 40px */
  
  /* 行高 */
  --leading-tight: 1.2;
  --leading-snug: 1.3;
  --leading-normal: 1.5;
  --leading-relaxed: 1.6;
  
  /* 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;
  --space-16: 64px;
  
  /* 容器 */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1400px;
  
  /* Z-index层级 */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-modal-backdrop: 300;
  --z-modal: 400;
  --z-popover: 500;
  --z-tooltip: 600;
  
  /* 玻璃拟态 */
  --glass-bg: rgba(255, 255, 255, 0.72);
  --glass-border: rgba(255, 255, 255, 0.2);
  --glass-backdrop: saturate(180%) blur(20px);
}

/* ============================================
   2. Dark Mode 配色方案
   ============================================ */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg-primary: #000000;
    --color-bg-secondary: #0d0d0d;
    --color-bg-tertiary: #141414;
    --color-bg-elevated: #1c1c1e;
    
    --color-text-primary: #ffffff;
    --color-text-secondary: #8e8e93;
    --color-text-tertiary: #636366;
    --color-text-inverse: #000000;
    
    --color-accent: #0a84ff;
    --color-accent-hover: #409cff;
    --color-accent-light: rgba(10, 132, 255, 0.2);
    
    --color-success: #30d158;
    --color-warning: #ff9f0a;
    --color-danger: #ff453a;
    
    --color-border: rgba(255, 255, 255, 0.1);
    --color-border-hover: rgba(255, 255, 255, 0.2);
    --color-separator: rgba(255, 255, 255, 0.08);
    
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.6);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.7);
    
    --glass-bg: rgba(28, 28, 30, 0.72);
    --glass-border: rgba(255, 255, 255, 0.08);
  }
}

/* 手动切换Dark Mode的类 */
[data-theme="dark"] {
  --color-bg-primary: #000000;
  --color-bg-secondary: #0d0d0d;
  --color-bg-tertiary: #141414;
  --color-bg-elevated: #1c1c1e;
  
  --color-text-primary: #ffffff;
  --color-text-secondary: #8e8e93;
  --color-text-tertiary: #636366;
  --color-text-inverse: #000000;
  
  --color-accent: #0a84ff;
  --color-accent-hover: #409cff;
  --color-accent-light: rgba(10, 132, 255, 0.2);
  
  --color-success: #30d158;
  --color-warning: #ff9f0a;
  --color-danger: #ff453a;
  
  --color-border: rgba(255, 255, 255, 0.1);
  --color-border-hover: rgba(255, 255, 255, 0.2);
  --color-separator: rgba(255, 255, 255, 0.08);
  
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.6);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.7);
  
  --glass-bg: rgba(28, 28, 30, 0.72);
  --glass-border: rgba(255, 255, 255, 0.08);
}

/* ============================================
   3. 基础重置与全局样式
   ============================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg-secondary);
  transition: background-color var(--duration-slow) var(--ease-smooth),
              color var(--duration-slow) var(--ease-smooth);
  min-height: 100vh;
}

/* 选中文本样式 */
::selection {
  background-color: var(--color-accent);
  color: white;
}

/* 滚动条样式 - 极简 */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--color-text-tertiary);
  border-radius: var(--radius-full);
  opacity: 0.3;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-secondary);
}

/* ============================================
   4. 玻璃拟态导航栏
   ============================================ */
.header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-backdrop);
  -webkit-backdrop-filter: var(--glass-backdrop);
  border-bottom: 1px solid var(--color-separator);
  transition: all var(--duration-normal) var(--ease-smooth);
}

.header-content {
  max-width: var(--container-2xl);
  margin: 0 auto;
  padding: 0 var(--space-5);
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

/* Logo样式 */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xl);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
  text-decoration: none;
  transition: opacity var(--duration-fast) var(--ease-smooth);
  flex-shrink: 0;
}

.logo:hover {
  opacity: 0.8;
}

.logo-icon {
  font-size: 1.2em;
  filter: saturate(0.8);
}

/* 搜索框 */
.header-search-form {
  flex: 1;
  max-width: 400px;
  position: relative;
}

.header-search-input {
  width: 100%;
  padding: var(--space-2) var(--space-4);
  padding-left: 36px;
  background: var(--color-bg-tertiary);
  border: 1px solid transparent;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  color: var(--color-text-primary);
  transition: all var(--duration-fast) var(--ease-smooth);
}

.header-search-input::placeholder {
  color: var(--color-text-tertiary);
}

.header-search-input:hover {
  background: var(--color-bg-primary);
  border-color: var(--color-border);
}

.header-search-input:focus {
  outline: none;
  background: var(--color-bg-primary);
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-light);
}

/* 搜索图标 */
.header-search-form::before {
  content: "🔍";
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 14px;
  opacity: 0.5;
  pointer-events: none;
}

/* 导航链接 */
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  flex-wrap: nowrap;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.nav::-webkit-scrollbar {
  display: none;
}

.nav a {
  position: relative;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-smooth);
  white-space: nowrap;
  flex-shrink: 0;
}

.nav a:hover {
  color: var(--color-text-primary);
  background: var(--color-bg-tertiary);
}

.nav a.active {
  color: var(--color-text-primary);
  background: var(--color-bg-tertiary);
}

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

/* 用户信息区 */
.user-info {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

/* 点数徽章 - 极简风格 */
.points-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  background: var(--color-accent-light);
  color: var(--color-accent);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: all var(--duration-fast) var(--ease-smooth);
}

.points-badge:hover {
  background: var(--color-accent);
  color: white;
  transform: scale(1.02);
}

/* 通知铃铛 */
.notification-link {
  position: relative;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  font-size: 18px;
  transition: all var(--duration-fast) var(--ease-smooth);
}

.notification-link:hover {
  background: var(--color-bg-tertiary);
}

.notification-badge {
  position: absolute;
  top: 2px;
  right: 2px;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  background: var(--color-danger);
  color: white;
  font-size: 10px;
  font-weight: 700;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--glass-bg);
}

/* ============================================
   5. 主容器
   ============================================ */
.container {
  max-width: var(--container-2xl);
  margin: 0 auto;
  padding: var(--space-6) var(--space-5);
}

/* ============================================
   6. 卡片组件 - 极简表面
   ============================================ */
.card {
  background: var(--color-bg-primary);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all var(--duration-normal) var(--ease-out-expo);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
  border-color: var(--color-border-hover);
}

.card-header {
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-separator);
}

.card-title {
  font-size: var(--text-2xl);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
  margin-bottom: var(--space-1);
}

.card-subtitle {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
}

.card-body {
  padding: var(--space-6);
}

.card-footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-separator);
  background: var(--color-bg-tertiary);
}

/* ============================================
   7. 按钮系统
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-5);
  font-size: var(--text-sm);
  font-weight: 500;
  line-height: 1.5;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out-expo);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-primary {
  background: var(--color-accent);
  color: white;
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  transform: scale(1.02);
}

.btn-primary:active {
  transform: scale(0.98);
}

.btn-secondary {
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-bg-secondary);
  border-color: var(--color-border-hover);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-primary);
}

.btn-ghost:hover {
  background: var(--color-bg-tertiary);
}

.btn-outline {
  background: transparent;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
}

.btn-outline:hover {
  background: var(--color-accent-light);
}

/* 尺寸变体 */
.btn-sm {
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
}

.btn-lg {
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-base);
}

.btn-xl {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-lg);
}

/* 图标按钮 */
.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
}

/* ============================================
   8. 表单组件
   ============================================ */
.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  margin-bottom: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-primary);
}

.form-control {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  line-height: 1.5;
  color: var(--color-text-primary);
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-smooth);
  font-family: inherit;
}

.form-control::placeholder {
  color: var(--color-text-tertiary);
}

.form-control:hover {
  border-color: var(--color-border-hover);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-light);
}

.form-control:disabled {
  background: var(--color-bg-tertiary);
  cursor: not-allowed;
}

textarea.form-control {
  resize: vertical;
  min-height: 120px;
}

select.form-control {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2386868b' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

/* ============================================
   9. 作品网格 - 核心组件
   ============================================ */
.work-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-5);
}

.work-item {
  background: var(--color-bg-primary);
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: all var(--duration-slow) var(--ease-out-expo);
  cursor: pointer;
  position: relative;
}

.work-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-border-hover);
}

.work-cover {
  aspect-ratio: 1;
  background: linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-bg-tertiary) 100%);
  position: relative;
  overflow: hidden;
}

.work-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slower) var(--ease-out-expo);
}

.work-item:hover .work-cover img {
  transform: scale(1.05);
}

/* 播放悬浮层 */
.play-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-smooth);
}

.work-item:hover .play-overlay {
  opacity: 1;
}

.play-btn-large {
  width: 56px;
  height: 56px;
  background: rgba(255, 255, 255, 0.95);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  transition: all var(--duration-fast) var(--ease-spring);
  transform: scale(0.9);
}

.work-item:hover .play-btn-large {
  transform: scale(1);
}

.play-btn-large:hover {
  transform: scale(1.1) !important;
  background: white;
}

/* CSS绘制的播放图标 */
.play-icon {
  width: 0;
  height: 0;
  border-left: 18px solid var(--color-text-primary);
  border-top: 11px solid transparent;
  border-bottom: 11px solid transparent;
  margin-left: 4px;
}

/* 作品信息 */
.work-info {
  padding: var(--space-4);
}

.work-title {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  letter-spacing: -0.01em;
}

.work-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.work-meta span {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

/* ============================================
   10. 英雄区 - 极简风格
   ============================================ */
.hero-section {
  background: var(--color-bg-primary);
  border-radius: var(--radius-2xl);
  padding: var(--space-12) var(--space-8);
  text-align: center;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--space-8);
}

.hero-title {
  font-size: var(--text-4xl);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
  line-height: var(--leading-tight);
}

.hero-subtitle {
  font-size: var(--text-xl);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto var(--space-8);
  line-height: var(--leading-relaxed);
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

/* ============================================
   11. 功能卡片网格
   ============================================ */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-5);
  margin-bottom: var(--space-8);
}

.feature-card {
  background: var(--color-bg-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: all var(--duration-normal) var(--ease-out-expo);
  position: relative;
  overflow: hidden;
}

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

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-hover));
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-smooth);
}

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

.feature-icon {
  width: 48px;
  height: 48px;
  background: var(--color-accent-light);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: var(--space-4);
  transition: transform var(--duration-fast) var(--ease-spring);
}

.feature-card:hover .feature-icon {
  transform: scale(1.1);
}

.feature-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
  letter-spacing: -0.01em;
}

.feature-desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-5);
}

/* ============================================
   12. 统计卡片
   ============================================ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-5);
  margin-bottom: var(--space-8);
}

.stat-card {
  background: var(--color-bg-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: all var(--duration-normal) var(--ease-out-expo);
}

.stat-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.stat-value {
  font-size: var(--text-3xl);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
  margin-bottom: var(--space-1);
}

.stat-label {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  font-weight: 500;
}

/* ============================================
   13. 轮播组件
   ============================================ */
.carousel-container {
  background: var(--color-bg-primary);
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.carousel-header {
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-separator);
}

.carousel {
  position: relative;
  padding: var(--space-6);
}

.carousel-track {
  display: flex;
  transition: transform var(--duration-slow) var(--ease-out-expo);
}

.carousel-item {
  min-width: 100%;
  padding: 0 var(--space-2);
}

.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--duration-fast) var(--ease-smooth);
  box-shadow: var(--shadow-md);
}

.carousel-btn:hover {
  background: var(--color-bg-primary);
  border-color: var(--color-border-hover);
  transform: translateY(-50%) scale(1.1);
}

.carousel-prev { left: var(--space-4); }
.carousel-next { right: var(--space-4); }

.carousel-dots {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-5);
}

.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--color-border);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-smooth);
}

.carousel-dot:hover {
  background: var(--color-text-tertiary);
}

.carousel-dot.active {
  background: var(--color-accent);
  width: 24px;
}

/* ============================================
   14. 徽章和标签
   ============================================ */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-smooth);
}

.badge-primary {
  background: var(--color-accent);
  color: white;
}

.badge-secondary {
  background: var(--color-bg-tertiary);
  color: var(--color-text-secondary);
}

.badge-outline {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
}

/* ============================================
   15. 提示和通知
   ============================================ */
.alert {
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-5);
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--text-sm);
  border: 1px solid transparent;
}

.alert-success {
  background: rgba(52, 199, 89, 0.1);
  color: var(--color-success);
  border-color: rgba(52, 199, 89, 0.2);
}

.alert-error {
  background: rgba(255, 59, 48, 0.1);
  color: var(--color-danger);
  border-color: rgba(255, 59, 48, 0.2);
}

.alert-warning {
  background: rgba(255, 149, 0, 0.1);
  color: var(--color-warning);
  border-color: rgba(255, 149, 0, 0.2);
}

.alert-info {
  background: var(--color-accent-light);
  color: var(--color-accent);
  border-color: rgba(0, 113, 227, 0.2);
}

/* ============================================
   16. 模态框
   ============================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal-backdrop);
  padding: var(--space-5);
  animation: fadeIn var(--duration-normal) var(--ease-smooth);
}

.modal {
  background: var(--color-bg-primary);
  border-radius: var(--radius-2xl);
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  animation: scaleIn var(--duration-normal) var(--ease-out-expo);
  border: 1px solid var(--color-border);
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.95) translateY(10px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

/* ============================================
   17. 进度条
   ============================================ */
.progress {
  width: 100%;
  height: 6px;
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: var(--color-accent);
  border-radius: var(--radius-full);
  transition: width var(--duration-slow) var(--ease-out-expo);
}

/* ============================================
   18. 页脚
   ============================================ */
.footer {
  background: var(--color-bg-primary);
  border-top: 1px solid var(--color-separator);
  padding: var(--space-8) var(--space-5);
  margin-top: var(--space-12);
}

.footer-content {
  max-width: var(--container-2xl);
  margin: 0 auto;
  text-align: center;
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--space-6);
  margin-top: var(--space-4);
}

.footer-links a {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-smooth);
}

.footer-links a:hover {
  color: var(--color-text-primary);
}

/* ============================================
   19. 播放器 - 底部固定
   ============================================ */
.global-player {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-backdrop);
  -webkit-backdrop-filter: var(--glass-backdrop);
  border-top: 1px solid var(--color-separator);
  z-index: var(--z-sticky);
  padding: var(--space-3) 0;
}

.player-container {
  max-width: var(--container-2xl);
  margin: 0 auto;
  padding: 0 var(--space-5);
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.player-info {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-width: 200px;
}

.player-cover {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  object-fit: cover;
  background: var(--color-bg-tertiary);
}

.player-meta {
  min-width: 0;
}

.player-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.player-artist {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.player-controls {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.player-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--color-text-primary);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-smooth);
  font-size: 16px;
}

.player-btn:hover {
  background: var(--color-bg-tertiary);
}

.player-btn-main {
  width: 44px;
  height: 44px;
  background: var(--color-text-primary);
  color: var(--color-bg-primary);
}

.player-btn-main:hover {
  background: var(--color-text-secondary);
  transform: scale(1.05);
}

.player-progress {
  flex: 1;
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.player-time {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  font-variant-numeric: tabular-nums;
  min-width: 36px;
}

/* ============================================
   20. 动画工具类
   ============================================ */
.animate-fade-in {
  animation: fadeIn var(--duration-normal) var(--ease-smooth);
}

.animate-slide-up {
  animation: slideUp var(--duration-normal) var(--ease-out-expo);
}

.animate-slide-down {
  animation: slideDown var(--duration-normal) var(--ease-out-expo);
}

.animate-scale-in {
  animation: scaleIn var(--duration-normal) var(--ease-out-expo);
}

/* 错开动画 */
.stagger-1 { animation-delay: 0.05s; }
.stagger-2 { animation-delay: 0.1s; }
.stagger-3 { animation-delay: 0.15s; }
.stagger-4 { animation-delay: 0.2s; }
.stagger-5 { animation-delay: 0.25s; }
.stagger-6 { animation-delay: 0.3s; }

/* ============================================
   21. 响应式设计
   ============================================ */
@media (max-width: 1024px) {
  .header-search-form {
    display: none;
  }
  
  .work-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  }
}

@media (max-width: 768px) {
  :root {
    --text-4xl: 2rem;
    --text-3xl: 1.5rem;
  }
  
  .header-content {
    height: 52px;
    padding: 0 var(--space-4);
  }
  
  .container {
    padding: var(--space-4);
  }
  
  .hero-section {
    padding: var(--space-8) var(--space-5);
  }
  
  .work-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: var(--space-3);
  }
  
  .feature-grid {
    grid-template-columns: 1fr;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .player-container {
    flex-wrap: wrap;
    gap: var(--space-2);
  }
  
  .player-progress {
    order: 3;
    width: 100%;
    flex: none;
  }
}

@media (max-width: 480px) {
  .work-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  
  .hero-actions .btn {
    width: 100%;
  }
}

/* ============================================
   22. 无障碍访问
   ============================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* 焦点可见性 */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
  :root {
    --color-border: rgba(0, 0, 0, 0.3);
    --color-text-secondary: #555;
  }
}

/* ============================================
   23. 工具类
   ============================================ */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

.text-primary { color: var(--color-text-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-tertiary { color: var(--color-text-tertiary); }
.text-accent { color: var(--color-accent); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-5 { margin-bottom: var(--space-5); }
.mb-6 { margin-bottom: var(--space-6); }

.hidden { display: none; }
.block { display: block; }
.flex { display: flex; }
.grid { display: grid; }

.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }

.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }

.w-full { width: 100%; }
.h-full { height: 100%; }

/* ============================================
   24. 主题切换按钮样式
   ============================================ */
.theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: transparent;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  transition: all var(--duration-fast) var(--ease-smooth);
  color: var(--color-text-secondary);
}

.theme-toggle:hover {
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
}

/* ============================================
   25. 红包弹窗 - Dark Mode适配
   ============================================ */
.red-packet-modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-normal) var(--ease-smooth);
}

.red-packet-modal.show {
  opacity: 1;
  visibility: visible;
}

.red-packet-box {
  background: linear-gradient(135deg, #ff6b6b 0%, #ee5a5a 100%);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  text-align: center;
  color: white;
  box-shadow: var(--shadow-xl);
  max-width: 360px;
  width: 90%;
  position: relative;
  transform: scale(0.9);
  transition: transform var(--duration-normal) var(--ease-spring);
}

.red-packet-modal.show .red-packet-box {
  transform: scale(1);
}

/* ============================================
   26. 旧版兼容性覆盖
   ============================================ */

/* 覆盖旧版死亡渐变 */
.stat-card[style*="gradient"],
.hero-section[style*="gradient"],
.work-cover[style*="gradient"] {
  background: var(--color-bg-primary) !important;
}

/* 停止旧版过度动画 */
[style*="animation: rotate"],
[style*="animation: pulse"],
[style*="animation: shimmer"] {
  animation: none !important;
}

/* 统一旧版圆角 */
[style*="border-radius: 980px"] {
  border-radius: var(--radius-full) !important;
}

/* 优化旧版阴影 */
[style*="box-shadow: 0 20px 40px"] {
  box-shadow: var(--shadow-md) !important;
}