/* ============================================================
   壁纸站 - 完整设计系统 (Dark Immersive Theme)
   Design Tokens, 组件库, 响应式
   ============================================================ */

/* ====== Design Tokens ====== */
:root {
  /* 颜色系统 */
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: #181825;
  --bg-elevated: #1e1e30;
  --bg-glass: rgba(24, 24, 37, 0.75);

  --accent-gradient: linear-gradient(135deg, #6C5CE7, #a29bfe);
  --accent-gradient-2: linear-gradient(135deg, #6C5CE7, #00cec9);
  --accent-solid: #6C5CE7;
  --accent-glow: 0 0 20px rgba(108, 92, 231, 0.3);
  --accent-hover: #7c6ff0;

  --text-primary: #f0f0f5;
  --text-secondary: #a0a0b8;
  --text-muted: #6b6b80;
  --text-on-accent: #ffffff;

  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-card: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(108, 92, 231, 0.3);

  /* 阴影系统 */
  --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-card-hover: 0 8px 30px rgba(0, 0, 0, 0.4), 0 0 0 1px var(--border-hover);
  --shadow-btn: 0 4px 15px rgba(108, 92, 231, 0.3);

  /* 圆角 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /* 排版 */
  --font-primary: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Inter", sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.75rem;

  /* 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;

  /* 过渡 */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-slow: 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

/* ====== Reset & Base ====== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  font-size: 16px;
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-primary);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}
a {
  color: #a29bfe;
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover {
  color: #c4bfff;
  text-decoration: none;
}
/* Focus visible for keyboard navigation */
:focus-visible {
  outline: 2px solid var(--accent-solid, #6C5CE7);
  outline-offset: 2px;
  border-radius: var(--radius-sm, 8px);
}
/* Remove focus ring for mouse users */
:focus:not(:focus-visible) {
  outline: none;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-5);
}

/* ====== Utility ====== */
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}

/* ====== Background Texture ====== */
body::before {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(108, 92, 231, 0.06) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(0, 206, 201, 0.04) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 80%, rgba(162, 155, 254, 0.03) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

/* ====== Header / Navigation ====== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(24px) saturate(1.2);
  -webkit-backdrop-filter: blur(24px) saturate(1.2);
  border-bottom: 1px solid var(--border-subtle);
  transition: background var(--transition-normal);
}
.header .container {
  display: flex;
  align-items: center;
  height: 64px;
  gap: var(--space-8);
}
.logo {
  font-size: var(--font-size-xl);
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
  letter-spacing: -0.5px;
  padding: 12px 0;
}
.logo:hover {
  opacity: 0.9;
}
.nav {
  display: flex;
  gap: var(--space-1);
  flex: 1;
}
.nav a {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: all var(--transition-fast);
}
.nav a:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
}

/* Desktop inline nav (hidden on mobile) */
.nav-desktop {
  display: flex;
  gap: 4px;
  flex: 1;
}
.nav-desktop a {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: all var(--transition-fast);
  text-decoration: none;
}
.nav-desktop a:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
}

/* 更多分类下拉菜单 */
.nav-more {
  position: relative;
  display: flex;
  align-items: center;
}
.nav-more-trigger {
  color: #999;
  text-decoration: none;
  padding: 8px 14px;
  cursor: pointer;
  white-space: nowrap;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: all var(--transition-fast);
}
.nav-more-trigger:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.06);
}
.nav-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--bg-elevated);
  border: 1px solid var(--border-card);
  border-radius: 8px;
  padding: 6px 0;
  min-width: 140px;
  z-index: 1000;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}
.nav-dropdown a {
  display: block;
  padding: 8px 20px;
  color: #bbb;
  text-decoration: none;
  white-space: nowrap;
  font-size: 14px;
  transition: all 0.15s;
}
.nav-dropdown a:hover {
  color: #fff;
  background: rgba(255,255,255,0.06);
}
.nav-more:hover .nav-dropdown,
.nav-more.open .nav-dropdown {
  display: block;
}

/* Hide mobile drawer on desktop */
@media (min-width: 769px) {
  .nav { display: none; }
}
.search-btn {
  background: none;
  border: 1px solid rgba(255,255,255,0.08);
  color: var(--text-muted);
  cursor: pointer;
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  display: flex;
  align-items: center;
  gap: 4px;
  transition: all var(--transition-fast);
  white-space: nowrap;
  flex-shrink: 0;
  line-height: 1;
}
.search-btn:hover {
  border-color: var(--accent-solid);
  color: var(--text-secondary);
  background: rgba(108, 92, 231, 0.08);
}
.search-btn svg {
  display: block;
}
.search-btn kbd {
  font-size: 10px;
  opacity: 0.4;
  padding: 1px 5px;
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 4px;
  line-height: 1.3;
  margin-left: 2px;
}

@media (max-width: 768px) {
  .search-btn kbd { display: none; }
  .search-btn { padding: 7px; border: none; }
  .search-btn:hover { border: none; }
  .menu-toggle + .search-btn { margin-left: auto; }
}

/* 内联搜索框（PC端导航栏内） */
.search-box {
  display: flex;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-full);
  overflow: hidden;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}
.search-box:focus-within {
  border-color: var(--accent-solid);
  box-shadow: 0 0 0 3px rgba(108,92,231,0.12);
}
.search-box-input {
  background: none;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  padding: 7px 0 7px 14px;
  width: 160px;
  transition: width var(--transition-normal);
}
.search-box-input:focus {
  width: 220px;
}
.search-box-input::placeholder {
  color: var(--text-muted);
  font-size: var(--font-size-sm);
}
.search-box-btn {
  background: none;
  border: none;
  cursor: pointer;
  padding: 7px 12px;
  color: var(--text-muted);
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
  line-height: 1;
  display: flex;
  align-items: center;
}
.search-box-btn:hover {
  color: var(--accent-solid);
}
.search-box-btn svg {
  display: block;
}

@media (max-width: 768px) {
  .search-box { display: none; }
}

@media (min-width: 769px) {
  .search-btn { display: none; }
}
.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-primary);
  padding: 4px 8px;
}

/* ====== Hero Section ====== */
.hero {
  position: relative;
  text-align: center;
  padding: 120px 16px 50px;
  overflow: hidden;
  isolation: isolate;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background:
    radial-gradient(circle at 30% 40%, rgba(108, 92, 231, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 70% 60%, rgba(0, 206, 201, 0.06) 0%, transparent 40%);
  z-index: -1;
  animation: heroGlow 15s ease-in-out infinite alternate;
}
@keyframes heroGlow {
  0% { opacity: 0.6; transform: scale(1); }
  100% { opacity: 1; transform: scale(1.03); }
}
.hero .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.hero h1 {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: var(--space-4);
  background: linear-gradient(135deg, #f0f0f5 0%, #a29bfe 50%, #6C5CE7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.15;
}
.hero p {
  color: var(--text-secondary);
  font-size: var(--font-size-lg);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ====== Section Title ====== */
.section-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin: var(--space-12) auto var(--space-6);
  letter-spacing: -0.3px;
  position: relative;
  display: block;
  text-align: center;
}
.section-title::after {
  content: '';
  display: block;
  width: 40px;
  height: 3px;
  margin-top: 8px;
  background: var(--accent-gradient);
  border-radius: var(--radius-full);
}
.section-subtitle {
  color: var(--text-muted);
  font-size: var(--font-size-sm);
  margin-top: -12px;
  margin-bottom: var(--space-5);
}

/* ====== Page Title Row ====== */
.page-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

/* ====== Hot Page Tabs ====== */
.hot-tabs {
  display: flex;
  gap: var(--space-1);
  align-items: center;
}
.hot-tab {
  color: var(--text-muted);
  cursor: pointer;
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
  user-select: none;
  padding: 10px 16px;
  border-radius: var(--radius-sm, 8px);
  letter-spacing: 0.3px;
}
.hot-tab + .hot-tab::before {
  content: '/';
  color: var(--border-card);
  margin: 0 var(--space-2);
  pointer-events: none;
}
.hot-tab:hover {
  color: var(--text-primary);
  background: rgba(108, 92, 231, 0.06);
}
.hot-tab.active {
  background: rgba(108, 92, 231, 0.12);
  color: var(--accent-solid);
  font-weight: 600;
}

/* ====== Device Adaptive Grid ====== */
.device-adaptive-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-5);
}
@media (min-width: 1400px) {
  .device-adaptive-grid { grid-template-columns: repeat(5, 1fr); }
}
@media (min-width: 1100px) and (max-width: 1399px) {
  .device-adaptive-grid { grid-template-columns: repeat(4, 1fr); }
}
@media (min-width: 769px) and (max-width: 1099px) {
  .device-adaptive-grid { grid-template-columns: repeat(3, 1fr); }
}
/* 桌面端：电脑壁纸先排，手机壁纸后排 */
@media (min-width: 769px) {
  .device-adaptive-grid .wallpaper-item[data-device="computer"] { order: 1; }
  .device-adaptive-grid .wallpaper-item[data-device="mobile"] { order: 2; }
}
/* 移动端：手机壁纸先排，电脑壁纸后排 */
@media (max-width: 768px) {
  .device-adaptive-grid .wallpaper-item[data-device="mobile"] { order: 1; }
  .device-adaptive-grid .wallpaper-item[data-device="computer"] { order: 2; }
}

/* ====== Homepage: Device-Specific Grid ====== */
/* 桌面首页：只显示电脑壁纸，隐藏手机壁纸 */
@media (min-width: 769px) {
  .home-grid .wallpaper-item[data-device="mobile"] {
    display: none;
  }
}
/* 移动首页：只显示手机壁纸，隐藏电脑壁纸 */
@media (max-width: 768px) {
  .home-grid .wallpaper-item[data-device="computer"] {
    display: none;
  }
}

/* ====== Detail Page: Device-Specific Related ====== */
/* 电脑端：只显示电脑推荐，隐藏手机推荐 */
section.related-section .related-desktop-only { display: grid; }
section.related-section .related-mobile-only { display: none; }
/* 手机端：只显示手机推荐，隐藏电脑推荐 */
@media (max-width: 768px) {
  section.related-section .related-desktop-only { display: none; }
  section.related-section .related-mobile-only { display: grid; }
}

/* ====== Hot Page: Tab Filter Overrides ====== */
#wallpapers-grid[data-filter="computer"] .wallpaper-item[data-device="mobile"] { display: none !important; }
#wallpapers-grid[data-filter="computer"] .wallpaper-item[data-device="computer"] { display: block !important; }
#wallpapers-grid[data-filter="mobile"] .wallpaper-item[data-device="computer"] { display: none !important; }
#wallpapers-grid[data-filter="mobile"] .wallpaper-item[data-device="mobile"] { display: block !important; }

/* Mobile drawer overlay */
#navOverlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.3);
  z-index: 99;
  opacity: 0;
  transition: opacity 0.2s ease;
}
#navOverlay.show {
  display: block;
  opacity: 1;
}
.wallpapers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-5);
}
/* 精准列数控制 - 避免 auto-fill 的宽度抖动 */
@media (min-width: 1400px) {
  .wallpapers-grid { grid-template-columns: repeat(5, 1fr); }
}
@media (min-width: 1100px) and (max-width: 1399px) {
  .wallpapers-grid { grid-template-columns: repeat(4, 1fr); }
}
@media (min-width: 769px) and (max-width: 1099px) {
  .wallpapers-grid { grid-template-columns: repeat(3, 1fr); }
}
.wallpaper-item {
  cursor: pointer;
  animation: cardFadeIn 0.5s ease both;
  min-width: 0;
}
.wallpaper-item:hover .wallpaper-thumb img {
  transform: scale(1.04);
}
.wallpaper-link {
  display: block;
}
.wallpaper-link:hover {
  text-decoration: none;
}
.wallpaper-thumb {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--bg-elevated) 30%, rgba(108,92,231,0.06) 50%, var(--bg-elevated) 70%);
  background-size: 200% 100%;
  animation: shimmer 2.5s ease-in-out infinite;
}
.wallpaper-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

/* 悬停下拉按钮 */
.wallpaper-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    0deg,
    rgba(0, 0, 0, 0.75) 0%,
    rgba(0, 0, 0, 0.05) 50%,
    rgba(0, 0, 0, 0.15) 100%
  );
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  padding-bottom: var(--space-6);
  opacity: 0;
  transition: opacity var(--transition-normal);
}
.wallpaper-item:hover .wallpaper-overlay {
  opacity: 1;
}
.wallpaper-res {
  color: #fff;
  font-size: var(--font-size-sm);
  font-weight: 500;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(8px);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-2);
}
.wallpaper-dl {
  color: #fff;
  font-size: var(--font-size-sm);
  font-weight: 600;
  background: var(--accent-gradient);
  padding: 8px 24px;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-btn);
}

/* 图片下方纯文字 */
.wallpaper-info {
  padding: var(--space-2) var(--space-1) 0;
}
  .wallpaper-info h3 {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-secondary);
    /* 移动端2行显示 */
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 1px;
    line-height: 1.3;
    min-height: calc(1em * 1.3 * 2);
  }
.wallpaper-cat {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
}

/* ====== Breadcrumb ====== */
.breadcrumb {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  padding: var(--space-5) 0 var(--space-3);
}
.breadcrumb a {
  color: var(--text-muted);
}
.breadcrumb a:hover {
  color: #a29bfe;
}
.breadcrumb span {
  color: var(--text-secondary);
}

/* ====== Page Title (分类页/标签页) ====== */
.page-title {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  margin-bottom: 0;
  letter-spacing: -0.5px;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
}

/* ====== Pagination ====== */
.pagination {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  margin: var(--space-10) auto;
  width: fit-content;
}
.page-placeholder {
  min-width: 110px;
  visibility: hidden;
}
.page-jump {
  display: inline-flex;
  align-items: center;
  gap: 2px;
}
.page-input {
  width: 48px;
  padding: 6px 4px;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm, 8px);
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  text-align: center;
  outline: none;
  transition: border-color var(--transition-fast);
}
.page-input:focus {
  border-color: var(--accent-solid, #6C5CE7);
}
.page-input::-webkit-inner-spin-button,
.page-input::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
.page-input[type=number] {
  -moz-appearance: textfield;
}
.pagination-pages {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
}
.pagination-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
}
.pagination a {
  padding: 10px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: all var(--transition-fast);
}
.pagination a:hover {
  border-color: var(--accent-solid);
  color: var(--text-primary);
  background: rgba(108, 92, 231, 0.1);
  text-decoration: none;
}
.page-info {
  color: var(--text-muted);
  font-size: var(--font-size-sm);
  padding: 0 var(--space-2);
}

/* ====== Detail Page ====== */
.main {
  padding-top: 64px;
  position: relative;
  z-index: 1;
}

/* ====== Left-Right Split Layout (Desktop) ====== */
.detail-split {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: var(--space-8);
  align-items: start;
}

/* Left: Preview Image */
.detail-left {
  min-width: 0;
  position: relative;
}

.detail-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  max-height: 80vh;
}

/* Right: Info Sidebar */
.detail-right {
  max-width: 360px;
  flex-shrink: 0;
  align-self: start;
  position: sticky;
  top: 84px;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.detail-title {
  font-size: var(--font-size-xl);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.3px;
  color: var(--text-primary);
  /* 多行省略 */
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 元信息列表 - 无框 */
.detail-meta-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.meta-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 6px 0;
  font-size: var(--font-size-sm);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}
.meta-row:last-child {
  border-bottom: none;
}
.meta-row-icon {
  font-size: var(--font-size-base);
  flex-shrink: 0;
  width: 20px;
  text-align: center;
  opacity: 0.6;
}
.meta-row-label {
  color: var(--text-muted);
  white-space: nowrap;
  min-width: 56px;
}
.meta-row-value {
  color: var(--text-primary);
  font-weight: 500;
  margin-left: auto;
}
.meta-row-value a {
  color: #a29bfe;
}
.meta-row-value a:hover {
  color: #c4bfff;
}

/* 标签区 - 无框 */
.detail-tags {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.detail-tags-label {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}
.detail-tags-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.detail-tags-list a {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  color: #a29bfe;
  background: rgba(108, 92, 231, 0.08);
  transition: all var(--transition-fast);
  min-height: 36px;
  display: inline-flex;
  align-items: center;
}
.detail-tags-list a:hover {
  background: rgba(108, 92, 231, 0.2);
  text-decoration: none;
}

/* 下载区域 */
.detail-download {
  text-align: center;
  padding: var(--space-5) 0 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  margin-top: auto;
}
.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 14px 32px;
  background: var(--accent-gradient);
  color: #fff;
  font-size: var(--font-size-lg);
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-btn);
  letter-spacing: 0.3px;
}
.download-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(108, 92, 231, 0.45);
  text-decoration: none;
  color: #fff;
}
.download-btn:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(108, 92, 231, 0.3);
}
.download-tip {
  margin-top: var(--space-2);
  color: var(--text-muted);
  font-size: var(--font-size-xs);
}

/* 分享/收录信息 */
.detail-share-info {
  text-align: center;
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  opacity: 0.7;
}
.detail-share-info a {
  color: var(--text-secondary);
}
.detail-share-info a:hover {
  color: #a29bfe;
}

/* ====== Related Section ====== */
.related-section {
  margin: var(--space-10) 0;
}

/* ====== Footer ====== */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  padding: var(--space-8) 0;
  margin-top: var(--space-16);
  position: relative;
  z-index: 1;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-1);
  margin-bottom: var(--space-3);
}
.footer-links a {
  color: var(--text-muted);
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}
.footer-links a:hover {
  color: #a29bfe;
}
.footer-divider {
  color: var(--border-card);
  font-size: var(--font-size-xs);
  padding: 0 2px;
  user-select: none;
}
.footer p {
  text-align: center;
  color: var(--text-muted);
  font-size: var(--font-size-sm);
}
.footer-icp {
  text-align: center;
  margin-top: var(--space-2);
}
.footer-icp a {
  color: var(--text-muted);
  font-size: var(--font-size-xs);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.footer-icp a:hover {
  color: #a29bfe;
}

/* ====== Search Panel ====== */
.search-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  z-index: 200;
}
.search-overlay.open { display: block; }

.search-panel {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 300;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-subtle);
  max-height: 100vh;
  overflow-y: auto;
}
.search-panel.open { display: block; animation: searchSlideDown 0.2s ease; }
@keyframes cardFadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.search-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--border-subtle);
}
.search-header .search-input {
  flex: 1;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  color: var(--text-primary);
  font-size: var(--font-size-lg);
  padding: 12px 16px;
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color var(--transition-fast);
}
.search-header .search-input:focus {
  border-color: var(--accent-solid);
  box-shadow: 0 0 0 3px rgba(108,92,231,0.15);
}
.search-header .search-input::placeholder {
  color: var(--text-muted);
}
.search-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  line-height: 1;
}
.search-close:hover {
  color: var(--text-primary);
  background: rgba(255,255,255,0.06);
}

.search-results {
  max-height: 60vh;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: var(--space-2) var(--space-5);
  min-height: 100px;
  padding-bottom: 70px; /* space for sticky view-all */
  padding-bottom: calc(70px + env(safe-area-inset-bottom, 0px));
}
.search-results.loading {
  opacity: 0.6;
}
.search-empty {
  text-align: center;
  padding: var(--space-10) var(--space-4);
  color: var(--text-muted);
  font-size: var(--font-size-sm);
}
.search-empty small {
  display: block;
  margin-top: var(--space-2);
  opacity: 0.5;
}

.search-item {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}
.search-item:hover, .search-item.selected {
  background: var(--bg-card);
  border-color: var(--border-card);
  text-decoration: none;
}
.search-item-thumb {
  width: 60px;
  height: 45px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg-elevated);
}
.search-item-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.search-item-info {
  flex: 1;
  min-width: 0;
}
.search-item-title {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 4px;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.search-item-title mark {
  background: rgba(108,92,231,0.3);
  color: #c4bfff;
  border-radius: 2px;
  padding: 0 2px;
}
.search-item-meta {
  display: flex;
  gap: var(--space-3);
  font-size: var(--font-size-xs);
  color: var(--text-muted);
}
.search-item-cat {
  color: var(--text-secondary);
}
.search-more {
  text-align: center;
  padding: var(--space-4);
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  opacity: 0.6;
}

/* 搜索结果页 */
.search-result-info {
  color: var(--text-muted);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-6);
}
.search-result-info strong {
  color: var(--text-primary);
}
.search-empty-state {
  text-align: center;
  padding: var(--space-16) var(--space-4);
  color: var(--text-muted);
}
.search-empty-state p {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-2);
}
.search-empty-hint {
  font-size: var(--font-size-sm);
  opacity: 0.6;
}
.search-highlight {
  background: rgba(108,92,231,0.3);
  color: #c4bfff;
  border-radius: 2px;
  padding: 0 2px;
}

/* 搜索页分页数字 */
.page-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 8px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  text-decoration: none;
  transition: all var(--transition-fast);
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}
.page-num:hover {
  border-color: var(--accent-solid);
  color: var(--text-primary);
  text-decoration: none;
}
.page-num--active {
  background: var(--accent-gradient);
  color: #fff;
  border-color: transparent;
}
.page-num:active {
  transform: scale(0.93);
}
.page-dots {
  color: var(--text-muted);
  padding: 0 4px;
  font-size: var(--font-size-sm);
}
.page-prev,
.page-next {
  min-width: 110px;
  text-align: center;
}

/* 下拉预览标签 */
.search-preview-label {
  padding: var(--space-3) var(--space-3) var(--space-1);
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  opacity: 0.7;
}
.search-view-all {
  position: sticky;
  bottom: 0;
  background: var(--bg-secondary);
  z-index: 2;
  text-align: center;
  padding: var(--space-3);
  border-top: 1px solid var(--border-subtle);
}
.search-view-all a {
  display: inline-block;
  padding: 8px 20px;
  background: var(--accent-gradient);
  color: #fff;
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: all var(--transition-fast);
}
.search-view-all a:hover {
  filter: brightness(1.1);
  text-decoration: none;
  transform: translateY(-1px);
}

@media (max-width: 480px) {
  .search-header { padding: var(--space-3) var(--space-3); gap: var(--space-2); }
  .search-header .search-input { font-size: var(--font-size-base); padding: 10px 12px; }
  .search-results { padding: var(--space-2) var(--space-3) var(--space-6); }
  .search-item { padding: var(--space-2); }
  .search-item-thumb { width: 48px; height: 36px; }
  .search-btn kbd { display: none; }
}

/* ====== Lightbox ====== */
.lightbox {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, 0.92);
  backdrop-filter: blur(12px);
  z-index: 9999;
  align-items: center;
  justify-content: center;
  animation: lightboxIn 0.25s ease;
}
.lightbox.open {
  display: flex;
}
@keyframes lightboxIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
.lightbox-close {
  position: absolute;
  top: var(--space-5);
  right: var(--space-6);
  font-size: 2.5rem;
  color: #fff;
  cursor: pointer;
  z-index: 10;
  line-height: 1;
  opacity: 0.6;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}
.lightbox-close:hover {
  opacity: 1;
  transform: scale(1.1);
}
.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: 3rem;
  color: rgba(255,255,255,0.5);
  cursor: pointer;
  z-index: 10;
  padding: 20px 16px;
  user-select: none;
  transition: color var(--transition-fast), background var(--transition-fast);
  border-radius: var(--radius-sm);
  line-height: 1;
}
.lightbox-nav:hover {
  color: #fff;
  background: rgba(255,255,255,0.08);
}
.lightbox-prev { left: var(--space-4); }
.lightbox-next { right: var(--space-4); }
.lightbox-content {
  max-width: 92vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.lightbox-content img {
  max-width: 92vw;
  max-height: 75vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.5);
}
.lightbox-info {
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-6);
  margin-top: var(--space-4);
  text-align: center;
  max-width: 500px;
  width: 100%;
}
.lightbox-info h3 {
  font-size: var(--font-size-lg);
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}
.lightbox-res {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  display: block;
  margin-bottom: var(--space-3);
}
.lightbox-actions {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  flex-wrap: wrap;
}
.lightbox-btn {
  display: inline-block;
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-card);
  transition: all var(--transition-fast);
}
.lightbox-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  text-decoration: none;
  color: var(--text-primary);
}
.lightbox-btn-primary {
  background: var(--accent-gradient);
  color: #fff;
  border-color: transparent;
  box-shadow: var(--shadow-btn);
}
.lightbox-btn-primary:hover {
  color: #fff;
  background: var(--accent-gradient);
  filter: brightness(1.1);
}

/* ====== Right-click Toast ====== */
#rightclick-toast {
  font-size: var(--font-size-base) !important;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4) !important;
  border: 1px solid var(--border-card) !important;
  backdrop-filter: blur(20px) !important;
  -webkit-backdrop-filter: blur(20px) !important;
}

/* ====== Scroll Animation ====== */
.wallpaper-item {
  animation: cardFadeIn 0.5s ease both;
}
@keyframes cardFadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ====== Reduced Motion ====== */
@media (prefers-reduced-motion: reduce) {
  .wallpaper-item,
  .wallpaper-thumb,
  .wallpaper-thumb img,
  .download-btn,
  .pagination a,
  .hot-tab,
  .detail-tags-list a,
  .search-panel,
  .lightbox,
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}
/* Stagger animation delay per item */
.wallpaper-item:nth-child(1) { animation-delay: 0.02s; }
.wallpaper-item:nth-child(2) { animation-delay: 0.04s; }
.wallpaper-item:nth-child(3) { animation-delay: 0.06s; }
.wallpaper-item:nth-child(4) { animation-delay: 0.08s; }
.wallpaper-item:nth-child(5) { animation-delay: 0.10s; }
.wallpaper-item:nth-child(6) { animation-delay: 0.12s; }
.wallpaper-item:nth-child(7) { animation-delay: 0.14s; }
.wallpaper-item:nth-child(8) { animation-delay: 0.16s; }
.wallpaper-item:nth-child(9) { animation-delay: 0.18s; }
.wallpaper-item:nth-child(10) { animation-delay: 0.20s; }
.wallpaper-item:nth-child(11) { animation-delay: 0.22s; }
.wallpaper-item:nth-child(12) { animation-delay: 0.24s; }

/* ====== Mobile Touch Feedback ====== */
@media (hover: none) {
  .wallpaper-item:active .wallpaper-thumb img {
    transform: scale(0.97);
    transition: transform 0.1s ease;
  }
  .wallpaper-item:active .wallpaper-thumb {
    box-shadow: 0 0 0 2px var(--accent-solid);
  }
  .nav a:active {
    background: rgba(108, 92, 231, 0.2);
    color: var(--text-primary);
  }
  .category-card:active {
    transform: translateY(-2px);
    border-color: var(--border-hover);
  }
  .pagination a:active {
    background: rgba(108, 92, 231, 0.2);
    border-color: var(--accent-solid);
  }
  .detail-tags-list a:active {
    background: rgba(108, 92, 231, 0.3);
  }
  .download-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(108, 92, 231, 0.3);
  }
  .lightbox-btn-primary:active {
    filter: brightness(0.9);
  }
  /* Mobile: hide hover overlay (unreachable on touch) */
  .wallpaper-overlay { display: none; }
}

/* ====== Responsive ====== */
@media (max-width: 1024px) {
  .wallpapers-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: var(--space-3);
  }
  .hero h1 { font-size: var(--font-size-3xl); }
}

@media (max-width: 768px) {
  .nav-backdrop { display: none; }
  .nav-desktop { display: none; }
  .search-box { display: none; }
  /* ── Left Drawer Navigation ── */
  .nav {
    position: fixed;
    display: flex;
    flex-direction: column;
    top: 0;
    left: 0;
    bottom: 0;
    width: 140px;
    background: #0d0d14;
    border-right: 1px solid var(--border-card);
    box-shadow: 8px 0 48px rgba(0, 0, 0, 0.4);
    z-index: 100;
    padding: 0;
    overflow-y: auto;
    visibility: hidden;
    transform: translateX(-100%);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.3s ease;
  }
  .nav.open {
    visibility: visible;
    transform: translateX(0);
  }

  /* Brand header */
  .nav-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-card);
    margin-bottom: 4px;
  }
  .nav-header .nav-brand {
    font-size: 19px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 0.5px;
  }
  .nav-header .nav-accent {
    width: 3px;
    height: 20px;
    background: linear-gradient(180deg, #a855f7, #7c3aed);
    border-radius: 2px;
    flex-shrink: 0;
  }

  /* Menu items */
  .nav a {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    margin: 0 8px;
    font-size: 16px;
    font-weight: 500;
    color: rgba(255,255,255,0.7);
    text-align: left;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.18s ease;
  }
  .nav a:hover,
  .nav a:active {
    background: rgba(168, 85, 247, 0.08);
    color: #fff;
  }

  .menu-toggle {
    display: block;
    position: absolute;
    left: 12px;
    background: none;
    border: none;
    font-size: 1.4rem;
    cursor: pointer;
    color: var(--text-primary);
    padding: 4px 6px;
    line-height: 1;
    z-index: 101;
  }

  .header .container {
    justify-content: center;
    position: relative;
  }

  .search-btn {
    position: absolute;
    right: 12px;
  }

  .wallpapers-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  /* 手机端更多分类：上下布局 */
  .nav .nav-more {
    flex-direction: column;
    align-items: stretch;
  }
  .nav .nav-dropdown {
    position: static;
    box-shadow: none;
    border: none;
    padding: 0 0 0 8px;
    min-width: auto;
    background: transparent;
  }
  .nav .nav-dropdown a {
    padding: 10px 16px;
    margin: 0 4px;
    font-size: 14px;
    border-radius: 6px;
  }

  .hero {
    padding: 95px 16px 40px;
  }
  .hero h1 {
    font-size: var(--font-size-2xl);
  }
  .hero p {
    font-size: var(--font-size-base);
  }

  /* Detail page: revert to stacked layout */
  .detail-split {
    display: block;
    gap: var(--space-5);
  }
  .detail-left {
    width: 100%;
  }
  .detail-img {
    width: 100%;
    height: auto;
    max-height: 55vh;
  }
  .detail-right {
    width: 100%;
    position: static;
    max-height: none;
    overflow-y: visible;
  }
  .detail-title { font-size: var(--font-size-xl); }

  .page-title { font-size: var(--font-size-2xl); }

  .lightbox-content img {
    max-height: 85vh;
    max-width: 96vw;
  }
  .lightbox-info { padding: var(--space-3) var(--space-4); }
  .lightbox-close { top: var(--space-3); right: var(--space-4); }

  .download-btn {
    padding: 14px 32px;
    font-size: var(--font-size-base);
    border-radius: var(--radius-full);
  }
}

@media (max-width: 480px) {

  .wallpapers-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }
  .container { padding: 0 12px; }
  .wallpaper-info h3 { font-size: 11px; }
  .wallpaper-info { padding: var(--space-1) 0 0; }
  .wallpaper-cat { font-size: 10px; }
  .detail-img { max-height: 60vh; }
  .detail-meta { gap: 6px; }
  .meta-item { font-size: var(--font-size-xs); padding: 6px 10px; }
  .detail-title { font-size: var(--font-size-lg); }
}