/* ============================================
   壁纸网站 - 全面美化版 CSS
   现代暗色主题 + 玻璃态效果 + 动态粒子背景
   ============================================ */

/* CSS Reset & Base */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* 主色调 - 更精致的紫色系渐变 */
  --primary: #8b5cf6;
  --primary-light: #a78bfa;
  --primary-dark: #7c3aed;
  --secondary: #ec4899;
  --secondary-light: #f472b6;
  --accent: #06b6d4;
  --accent-light: #22d3ee;
  
  /* 暗色背景层次 */
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-tertiary: #1a1a25;
  --bg-elevated: #252535;
  
  /* 玻璃态效果 */
  --glass-bg: rgba(255, 255, 255, 0.03);
  --glass-bg-hover: rgba(255, 255, 255, 0.06);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-border-strong: rgba(255, 255, 255, 0.15);
  
  /* 文字颜色 */
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-subtle: #64748b;
  
  /* 渐变系统 */
  --gradient-primary: linear-gradient(135deg, #8b5cf6 0%, #ec4899 50%, #06b6d4 100%);
  --gradient-secondary: linear-gradient(135deg, #06b6d4 0%, #8b5cf6 100%);
  --gradient-accent: linear-gradient(135deg, #ec4899 0%, #f97316 100%);
  --gradient-dark: linear-gradient(180deg, rgba(139, 92, 246, 0.15) 0%, transparent 100%);
  --gradient-glow: radial-gradient(ellipse at center, rgba(139, 92, 246, 0.3) 0%, transparent 70%);
  
  /* 阴影系统 */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px rgba(139, 92, 246, 0.3);
  --shadow-glow-pink: 0 0 40px rgba(236, 72, 153, 0.3);
  
  /* 圆角系统 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 50%;
  
  /* 动画缓动 */
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
  --ease-spring: cubic-bezier(0.175, 0.885, 0.32, 1.275);
  
  /* 间距 */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
}

/* 基础样式 */
html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg-primary);
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  color: var(--text-primary);
  overflow-x: hidden;
  line-height: 1.6;
  position: relative;
}

/* ============================================
   动态粒子背景 Canvas
   ============================================ */
#particleCanvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.6;
}

/* 背景光效层 */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 120% 60% at 10% 20%, rgba(139, 92, 246, 0.12) 0%, transparent 50%),
    radial-gradient(ellipse 100% 50% at 90% 80%, rgba(236, 72, 153, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse 80% 40% at 50% 100%, rgba(6, 182, 212, 0.06) 0%, transparent 50%),
    radial-gradient(ellipse 60% 30% at 80% 10%, rgba(139, 92, 246, 0.08) 0%, transparent 40%);
  pointer-events: none;
  z-index: 0;
  animation: bgPulse 20s ease-in-out infinite;
}

@keyframes bgPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

/* 滚动进度条 */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: var(--gradient-primary);
  z-index: 10001;
  transition: width 0.1s linear;
  box-shadow: 0 0 10px rgba(139, 92, 246, 0.5);
}

/* ============================================
   头部区域 - 玻璃态导航
   ============================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 20px 32px;
  background: rgba(10, 10, 15, 0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
}

.header-content {
  max-width: 1600px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

/* Logo设计 */
.logo {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 24px;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
  cursor: pointer;
  transition: transform 0.3s var(--ease-spring);
}

.logo:hover {
  transform: scale(1.02);
}

.logo-icon {
  width: 48px;
  height: 48px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 800;
  -webkit-text-fill-color: initial;
  color: #fff;
  box-shadow: var(--shadow-glow);
  position: relative;
  overflow: hidden;
}

.logo-icon::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 40%, rgba(255,255,255,0.3) 50%, transparent 60%);
  animation: shimmer 3s infinite;
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.header-desc {
  color: var(--text-muted);
  font-size: 14px;
  max-width: 320px;
  text-align: right;
}

/* PC端顶部网址 */
.pc-top-url {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.1) 0%, rgba(236, 72, 153, 0.05) 100%);
  border-bottom: 1px solid var(--glass-border);
  padding: 10px 20px;
  text-align: center;
}

.pc-top-url-content {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

.pc-url-label {
  font-size: 13px;
  color: var(--text-muted);
}

.pc-url-main {
  font-size: 16px;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.pc-url-large {
  font-size: 15px;
  font-weight: 600;
  color: var(--primary-light);
}

/* 移动端网址横幅 */
.mobile-url-banner {
  display: none;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.15) 0%, rgba(236, 72, 153, 0.1) 100%);
  border-bottom: 1px solid var(--glass-border);
  padding: 16px 20px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.mobile-url-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
  animation: shimmer 3s infinite;
}

@keyframes shimmer {
  0% { left: -100%; }
  100% { left: 100%; }
}

.mobile-url-content {
  position: relative;
  z-index: 1;
}

.mobile-url-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 6px;
  letter-spacing: 1px;
}

.mobile-url-main {
  font-size: 22px;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
  text-shadow: 0 0 30px rgba(139, 92, 246, 0.3);
}

.mobile-url-sub {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  align-items: center;
}

.url-badge {
  display: inline-block;
  padding: 4px 12px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  font-size: 12px;
  color: var(--text-secondary);
}

.url-badge-large {
  font-size: 14px;
  padding: 6px 14px;
  background: var(--gradient-primary);
  color: #fff;
  border-color: transparent;
  font-weight: 600;
  box-shadow: 0 4px 15px rgba(139, 92, 246, 0.4);
}



/* ============================================
   主布局 - 侧边栏 + 内容区
   ============================================ */
.desktop-layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 32px;
  max-width: 1600px;
  margin: 0 auto;
  padding: 32px;
}

/* ============================================
   侧边栏 - 玻璃态卡片
   ============================================ */
.sidebar {
  position: sticky;
  top: 100px;
  height: calc(100vh - 132px);
  overflow-y: auto;
  background: var(--glass-bg);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  border-radius: var(--radius-xl);
  border: 1px solid var(--glass-border);
  padding: 28px 20px;
  scrollbar-width: thin;
  scrollbar-color: var(--primary) transparent;
  transition: all 0.3s var(--ease-smooth);
}

.sidebar:hover {
  border-color: var(--glass-border-strong);
  box-shadow: var(--shadow-lg);
}

.sidebar::-webkit-scrollbar {
  width: 5px;
}

.sidebar::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--primary), var(--secondary));
  border-radius: 10px;
}

.sidebar-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 24px;
  padding: 0 12px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 12px;
}

.sidebar-title::before {
  content: '';
  width: 4px;
  height: 22px;
  background: var(--gradient-primary);
  border-radius: 4px;
}

/* 侧边栏分区 */
.sidebar-section {
  margin-bottom: 12px;
}

.section-label {
  font-size: 11px;
  color: var(--text-subtle);
  padding: 16px 12px 10px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 8px;
}

.section-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--glass-border), transparent);
}

/* 分类项目 - 精致按钮 */
.cat-item {
  width: 100%;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  margin-bottom: 8px;
  cursor: pointer;
  font-size: 14px;
  text-align: left;
  background: transparent;
  border: 1px solid transparent;
  transition: all 0.4s var(--ease-smooth);
  color: var(--text-secondary);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 14px;
  position: relative;
  overflow: hidden;
}

.cat-item::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity 0.4s var(--ease-smooth);
  z-index: 0;
}

.cat-item:hover {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border);
  color: var(--text-primary);
  transform: translateX(6px);
}

.cat-item.active {
  background: var(--gradient-primary);
  color: #fff;
  border-color: transparent;
  box-shadow: var(--shadow-glow);
  font-weight: 600;
}

.cat-item span {
  position: relative;
  z-index: 1;
}

.cat-icon {
  width: 32px;
  height: 32px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--glass-bg);
  font-size: 15px;
  transition: all 0.4s var(--ease-spring);
  border: 1px solid var(--glass-border);
}

.cat-item:hover .cat-icon,
.cat-item.active .cat-icon {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(1.1) rotate(5deg);
  border-color: rgba(255, 255, 255, 0.3);
}

/* 视频分类特殊样式 */
.video-cat .cat-icon {
  background: linear-gradient(135deg, rgba(236, 72, 153, 0.2), rgba(249, 115, 22, 0.2));
}

/* ============================================
   移动端分类
   ============================================ */
.mobile-cats {
  display: none;
  position: relative;
  z-index: 1000;
  background: rgba(10, 10, 15, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
}

.mobile-cats-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 20px;
  background: var(--gradient-primary);
  cursor: pointer;
}

.mobile-cats-title {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 8px;
}

.mobile-cats-toggle {
  background: none;
  border: none;
  color: #fff;
  font-size: 14px;
  cursor: pointer;
  padding: 6px 12px;
  border-radius: 8px;
  transition: background 0.3s;
}

.mobile-cats-toggle:hover {
  background: rgba(255, 255, 255, 0.2);
}

.toggle-icon {
  display: inline-block;
  transition: transform 0.3s var(--ease-spring);
}

.mobile-cats.collapsed .toggle-icon {
  transform: rotate(-90deg);
}

.mobile-cats-content {
  max-height: 65vh;
  overflow-y: auto;
  padding: 16px 20px;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  transition: max-height 0.4s var(--ease-smooth);
}

.mobile-cats.collapsed .mobile-cats-content {
  max-height: 0;
  padding: 0 20px;
  overflow: hidden;
}

.mobile-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.mobile-section-label {
  grid-column: 1/-1;
  padding: 10px 0 6px;
  font-size: 12px;
  font-weight: 600;
  color: var(--secondary);
  border-bottom: 1px solid var(--glass-border);
  margin-bottom: 6px;
}

.mobile-cat {
  padding: 12px 6px;
  border-radius: var(--radius-md);
  background: var(--glass-bg);
  text-align: center;
  font-size: 12px;
  cursor: pointer;
  color: var(--text-muted);
  transition: all 0.3s var(--ease-smooth);
  border: 1px solid transparent;
  font-weight: 500;
}

.mobile-cat:hover {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border);
}

.mobile-cat.active {
  background: var(--gradient-primary);
  color: #fff;
  font-weight: 600;
  box-shadow: var(--shadow-glow);
}

/* ============================================
   主内容区
   ============================================ */
.main-content {
  min-height: calc(100vh - 200px);
}

/* 区域标题 */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
  padding: 0 4px;
}

.section-title {
  font-size: 26px;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 14px;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-title::after {
  content: '';
  width: 50px;
  height: 4px;
  background: var(--gradient-primary);
  border-radius: 4px;
  box-shadow: 0 0 10px rgba(139, 92, 246, 0.5);
}

.item-count {
  font-size: 13px;
  color: var(--text-muted);
  background: var(--glass-bg);
  padding: 8px 18px;
  border-radius: 20px;
  border: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  gap: 8px;
}

.item-count::before {
  content: '';
  width: 8px;
  height: 8px;
  background: #22c55e;
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.2); }
}

/* ============================================
   壁纸网格 - 瀑布流布局
   ============================================ */
.wall-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
  padding-bottom: 100px;
}

.wall-grid.single {
  grid-template-columns: 1fr !important;
  max-width: 1000px;
  margin: 0 auto;
}

/* 骨架屏卡片 */
.skeleton-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-tertiary);
  position: relative;
}

.skeleton-card::before {
  content: '';
  display: block;
  padding-top: 150%;
}

.skeleton-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.05) 50%, transparent 100%);
  animation: skeleton-loading 1.5s infinite;
}

@keyframes skeleton-loading {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* 壁纸卡片 - 玻璃态悬浮效果 */
.wall-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  transition: all 0.5s var(--ease-spring);
  position: relative;
  cursor: pointer;
  transform-style: preserve-3d;
}

.wall-card::before {
  content: '';
  display: block;
  padding-top: 150%;
}

.wall-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.1) 0%, rgba(236, 72, 153, 0.1) 100%);
  opacity: 0;
  transition: opacity 0.4s;
  z-index: 1;
  pointer-events: none;
}

.wall-card:hover {
  transform: translateY(-12px) scale(1.02);
  box-shadow: var(--shadow-glow);
  border-color: rgba(139, 92, 246, 0.3);
}

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

.wall-card img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  opacity: 0;
  transition: opacity 0.6s var(--ease-smooth), transform 0.6s var(--ease-smooth);
}

.wall-card:hover img {
  transform: scale(1.08);
}

.wall-card img.loaded {
  opacity: 1;
}

/* 卡片遮罩层 */
.card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 30%, rgba(10, 10, 15, 0.95) 100%);
  opacity: 0;
  transition: opacity 0.4s var(--ease-smooth);
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 24px;
}

.wall-card:hover .card-overlay {
  opacity: 1;
}

.card-info {
  transform: translateY(30px);
  transition: transform 0.4s var(--ease-spring);
}

.wall-card:hover .card-info {
  transform: translateY(0);
}

.card-tag {
  font-size: 12px;
  color: var(--secondary-light);
  font-weight: 600;
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
}

.card-title {
  font-size: 17px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  text-shadow: 0 2px 10px rgba(0,0,0,0.5);
}

.card-actions {
  display: flex;
  gap: 12px;
}

.card-btn {
  flex: 1;
  padding: 12px 18px;
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s var(--ease-spring);
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.card-btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 4px 15px rgba(139, 92, 246, 0.4);
}

.card-btn-primary:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 25px rgba(139, 92, 246, 0.5);
}

.card-btn-secondary {
  background: var(--glass-bg);
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(10px);
}

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

/* 加载动画 */
.loading {
  text-align: center;
  padding: 60px;
  color: var(--text-muted);
  font-size: 15px;
  display: none;
  grid-column: 1/-1;
}

.loading.show {
  display: block;
}

.spinner {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  position: relative;
}

.spinner::before,
.spinner::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 3px solid transparent;
}

.spinner::before {
  border-top-color: var(--primary);
  animation: spin 1s linear infinite;
}

.spinner::after {
  border: 3px solid var(--glass-border);
}

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

/* ============================================
   预览模态框 - 沉浸式体验
   ============================================ */
.preview {
  position: fixed;
  inset: 0;
  background: rgba(10, 10, 15, 0.98);
  display: none;
  flex-direction: column;
  z-index: 10000;
  backdrop-filter: blur(40px);
}

.preview.active {
  display: flex;
  animation: previewShow 0.4s var(--ease-smooth);
}

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

.preview-header {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  padding: 24px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  z-index: 10;
  background: linear-gradient(180deg, rgba(10, 10, 15, 0.9) 0%, transparent 100%);
}

.preview-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 12px;
}

.preview-title::before {
  content: '';
  font-size: 20px;
}

.preview-content {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 100px 120px 120px;
  position: relative;
}

.preview-image-wrapper {
  position: relative;
  max-width: calc(100vw - 240px);
  max-height: calc(100vh - 240px);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 30px 100px rgba(0, 0, 0, 0.7), 0 0 0 1px var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: center;
}

.preview-image-wrapper.original-preview {
  aspect-ratio: auto;
  width: auto;
  height: auto;
}

.preview img {
  max-width: min(90vw, 1500px);
  max-height: calc(100vh - 240px);
  width: auto;
  height: auto;
  object-fit: contain;
  display: block;
  animation: imageShow 0.5s var(--ease-spring);
}

@keyframes imageShow {
  from { opacity: 0; transform: scale(0.95) translateY(20px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

/* 关闭按钮 */
.close {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  font-size: 24px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s var(--ease-spring);
  backdrop-filter: blur(10px);
}

.close:hover {
  background: var(--gradient-accent);
  border-color: transparent;
  color: #fff;
  transform: rotate(90deg) scale(1.1);
}

/* 导航按钮 */
.nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 60px;
  height: 140px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  font-size: 32px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s var(--ease-spring);
  z-index: 10;
  backdrop-filter: blur(10px);
}

.nav-btn:hover {
  background: var(--gradient-primary);
  border-color: transparent;
  color: #fff;
  transform: translateY(-50%) scale(1.08);
  box-shadow: var(--shadow-glow);
}

.nav-btn.prev { left: 24px; }
.nav-btn.next { right: 24px; }

/* 预览底部 */
.preview-footer {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 24px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  background: linear-gradient(0deg, rgba(10, 10, 15, 0.95) 0%, transparent 100%);
}

.preview-tag {
  font-size: 14px;
  color: var(--text-muted);
  padding: 12px 24px;
  background: var(--glass-bg);
  border-radius: 30px;
  border: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  gap: 10px;
}

.preview-tag::before {
  content: '';
}

.preview-download {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 32px;
  background: var(--gradient-primary);
  color: #fff;
  border: none;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s var(--ease-spring);
  box-shadow: 0 4px 20px rgba(139, 92, 246, 0.4);
}

.preview-download:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 30px rgba(139, 92, 246, 0.5);
}

.preview-download svg {
  width: 20px;
  height: 20px;
}

/* 图片计数器 */
.image-counter {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  padding: 10px 24px;
  border-radius: 30px;
  font-size: 14px;
  color: var(--text-muted);
  border: 1px solid var(--glass-border);
}

/* ============================================
   视频播放器
   ============================================ */
.video-container {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 20px 0 100px;
  min-height: calc(100vh - 150px);
}

.video-player-wrapper {
  position: relative;
  width: 100%;
  max-width: 420px;
  aspect-ratio: 9/16;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: #000;
  box-shadow: var(--shadow-glow-pink);
  border: 1px solid var(--glass-border);
}

.video-player-wrapper::before {
  content: '';
  position: absolute;
  inset: -2px;
  background: var(--gradient-accent);
  z-index: -1;
  border-radius: calc(var(--radius-xl) + 2px);
  opacity: 0.5;
  filter: blur(20px);
}

#videoElement {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.video-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  z-index: 2;
}

.video-spinner {
  display: none;
}

.video-spinner.show {
  display: flex;
}

.spinner-ring {
  width: 56px;
  height: 56px;
  border: 4px solid var(--glass-border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.video-controls {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 24px;
  background: linear-gradient(0deg, rgba(10, 10, 15, 0.95) 0%, transparent 100%);
  display: flex;
  align-items: center;
  justify-content: space-between;
  z-index: 3;
}

.v-ctrl {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s var(--ease-spring);
}

.v-ctrl:hover {
  background: var(--gradient-primary);
  border-color: transparent;
  color: #fff;
  transform: scale(1.15);
  box-shadow: var(--shadow-glow);
}

.v-ctrl svg {
  width: 24px;
  height: 24px;
}

.video-cat-label {
  font-size: 14px;
  color: var(--text-primary);
  font-weight: 600;
  padding: 12px 24px;
  background: var(--glass-bg);
  border-radius: 24px;
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(10px);
}

/* ============================================
   页脚
   ============================================ */
.site-footer {
  position: relative;
  z-index: 1;
  background: linear-gradient(180deg, transparent 0%, rgba(10, 10, 15, 0.8) 100%);
  backdrop-filter: blur(20px);
  color: var(--text-muted);
  padding: 60px 20px 40px;
  text-align: center;
  font-size: 14px;
  border-top: 1px solid var(--glass-border);
  margin-top: 60px;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-brand {
  font-size: 28px;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.footer-desc {
  color: var(--text-subtle);
  max-width: 500px;
  margin: 0 auto 24px;
  line-height: 1.8;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 32px;
  margin: 24px 0;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  transition: all 0.3s;
  padding: 8px 16px;
  border-radius: 20px;
}

.footer-links a:hover {
  color: var(--primary-light);
  background: var(--glass-bg);
}

.footer-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin: 32px 0;
  flex-wrap: wrap;
}

.stat-item {
  text-align: center;
}

.stat-value {
  font-size: 32px;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 13px;
  color: var(--text-subtle);
  margin-top: 4px;
}

.copyright {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--glass-border);
  color: var(--text-subtle);
}

/* 网站网址展示 */
.site-url {
  margin: 20px 0;
  text-align: center;
}

.url-text {
  color: var(--text-secondary);
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
  gap: 4px;
}

.url-large {
  color: var(--primary-light);
  font-size: 18px;
  font-weight: 600;
}

/* ============================================
   Toast通知
   ============================================ */
.toast-notification {
  position: fixed;
  top: 100px;
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  color: var(--text-primary);
  padding: 16px 32px;
  border-radius: 30px;
  font-size: 14px;
  font-weight: 600;
  z-index: 20000;
  opacity: 0;
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-lg);
  transition: all 0.3s var(--ease-spring);
}

.toast-notification.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.toast-notification.error {
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  border-color: transparent;
}

.toast-notification.success {
  background: linear-gradient(135deg, #22c55e 0%, #16a34a 100%);
  border-color: transparent;
}

/* ============================================
   滚动条美化
   ============================================ */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--primary), var(--secondary));
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, var(--primary-light), var(--secondary-light));
}

/* 选中文字样式 */
::selection {
  background: var(--primary);
  color: #fff;
}

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 1200px) {
  .desktop-layout {
    grid-template-columns: 260px 1fr;
    gap: 24px;
    padding: 24px;
  }
  
  .wall-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 20px;
  }
}

@media (max-width: 1024px) {
  .site-header {
    display: none;
  }

  .pc-top-url {
    display: none;
  }

  .mobile-url-banner {
    display: block;
  }

  .desktop-layout {
    grid-template-columns: 1fr;
    padding: 16px;
    padding-top: 8px;
  }
  
  .sidebar {
    display: none;
  }
  
  .mobile-cats {
    display: block;
  }
  
  .section-header {
    margin-bottom: 20px;
  }
  
  .section-title {
    font-size: 22px;
  }
}

@media (max-width: 768px) {
  .wall-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
  
  .preview-content {
    padding: 80px 70px 100px;
  }
  
  .preview-image-wrapper {
    max-width: 100%;
    max-height: calc(100vh - 180px);
  }
  
  .preview img {
    max-width: 100%;
    max-height: calc(100vh - 180px);
  }
  
  .nav-btn {
    width: 48px;
    height: 90px;
    font-size: 24px;
  }
  
  .nav-btn.prev { left: 10px; }
  .nav-btn.next { right: 10px; }
  
  .preview-footer {
    padding: 16px 20px;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
  }
  
  .preview-download {
    padding: 12px 24px;
    font-size: 14px;
  }
  
  .mobile-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .footer-stats {
    gap: 24px;
  }
  
  .stat-value {
    font-size: 24px;
  }
}

@media (max-width: 480px) {
  .wall-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .video-player-wrapper {
    max-width: 100%;
    border-radius: var(--radius-md);
    margin: 0 10px;
  }

  .mobile-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
  }

  .mobile-cat {
    padding: 10px 4px;
    font-size: 11px;
  }

  .card-overlay {
    padding: 16px;
  }

  .card-title {
    font-size: 14px;
  }

  .card-btn {
    padding: 10px 14px;
    font-size: 12px;
  }

  .mobile-url-banner {
    padding: 12px 16px;
  }

  .mobile-url-main {
    font-size: 20px;
  }

  .mobile-url-sub {
    gap: 6px;
  }

  .url-badge {
    font-size: 11px;
    padding: 3px 10px;
  }

  .url-badge-large {
    font-size: 13px;
    padding: 5px 12px;
  }
}

/* 动画关键帧 */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideIn {
  from { opacity: 0; transform: translateX(-20px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.9); }
  to { opacity: 1; transform: scale(1); }
}

/* 进入动画类 */
.animate-fade-in {
  animation: fadeIn 0.5s var(--ease-smooth) forwards;
}

.animate-slide-in {
  animation: slideIn 0.5s var(--ease-smooth) forwards;
}

.animate-scale-in {
  animation: scaleIn 0.4s var(--ease-spring) forwards;
}