:root {
  --bg-primary: #f0f8ff;
  --bg-secondary: #fafcfe;
  --bg-card: #ffffff;
  --bg-card-hover: #ffffff;
  --text-primary: #1a202c;
  --text-secondary: #2d3748;
  --text-muted: #718096;
  --text-light: #8492a6;
  --text-extra-light: #a0aec0;
  --text-ultra-light: #bcc4d2;
  --border-color: #e8ecf2;
  --border-hover: #c8e0f8;
  --border-footer: #e2edf6;
  --accent: #4a8cdb;
  --accent-hover: #3a7bc8;
  --accent-light: #5b9de8;
  --accent-bg: #f0f8ff;
  --accent-bg-hover: #e0f0fa;
  --accent-border: #d8ecf8;
  --success: #10b981;
  --success-bg: #ecfdf5;
  --success-border: #a7f3d0;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 2px 12px rgba(0, 0, 0, 0.03);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.06), 0 8px 28px rgba(74, 140, 219, 0.12);
  --shadow-btn: 0 6px 20px rgba(74, 140, 219, 0.3);
  --shadow-btn-secondary: 0 6px 20px rgba(74, 140, 219, 0.25);
  --shadow-icon: 0 4px 14px rgba(0, 0, 0, 0.1);
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 18px;
  --radius-full: 50%;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.25s ease;
  --transition-slow: 0.35s ease;
}

[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-secondary: #1a2332;
  --bg-card: #1e293b;
  --bg-card-hover: #243447;
  --text-primary: #e2e8f0;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-light: #8899aa;
  --text-extra-light: #6b7d8e;
  --text-ultra-light: #5a6d7e;
  --border-color: #2d3d52;
  --border-hover: #3d5a80;
  --border-footer: #2d3d52;
  --accent: #60a5fa;
  --accent-hover: #3b82f6;
  --accent-light: #93c5fd;
  --accent-bg: #172554;
  --accent-bg-hover: #1e3a6e;
  --accent-border: #1e3a6e;
  --success: #34d399;
  --success-bg: #052e1d;
  --success-border: #064e3b;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.15), 0 2px 12px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.2), 0 8px 28px rgba(0, 0, 0, 0.18);
  --shadow-btn: 0 6px 20px rgba(96, 165, 250, 0.25);
  --shadow-btn-secondary: 0 6px 20px rgba(96, 165, 250, 0.2);
  --shadow-icon: 0 4px 14px rgba(0, 0, 0, 0.25);
}

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

[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 40%, var(--bg-primary) 100%);
  min-height: 100vh;
  color: var(--text-secondary);
  padding: 40px 20px 20px;
  transition: background 0.35s ease, color 0.35s ease;
  line-height: 1.6;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  animation: fadeInUp 0.6s ease both;
}

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

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

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes bounceIn {
  0% {
    opacity: 0;
    transform: scale(0.3);
  }
  50% {
    transform: scale(1.08);
  }
  70% {
    transform: scale(0.95);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

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

.top-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1100px;
  margin: 0 auto 12px;
  padding: 12px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: background var(--transition-normal), border-color var(--transition-normal);
  animation: fadeInUp 0.6s ease both;
}

.nav-left {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: inherit;
}

.nav-logo {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  flex-shrink: 0;
}

.nav-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  transition: color var(--transition-normal);
  white-space: nowrap;
}

.nav-domain {
  font-size: 0.72rem;
  color: var(--text-extra-light);
  text-decoration: none;
  transition: color var(--transition-fast);
  white-space: nowrap;
  padding-left: 46px;
}

.nav-domain:hover {
  color: var(--accent);
  text-decoration: underline;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 7px 18px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-link:hover {
  color: var(--accent);
  background: var(--accent-bg);
}

.nav-link.active {
  color: var(--accent);
  background: var(--accent-bg);
}

.header {
  text-align: center;
  margin-bottom: 32px;
  animation: fadeInUp 0.6s ease both;
}

.header h1 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
  letter-spacing: 1px;
  transition: color var(--transition-normal);
}

.header-tagline {
  font-size: 1rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 1px;
  margin-bottom: 10px;
  transition: color var(--transition-normal);
}

.subtitle {
  font-size: 0.95rem;
  color: var(--text-muted);
  letter-spacing: 0.5px;
  max-width: 600px;
  margin: 0 auto;
  transition: color var(--transition-normal);
}

.tool-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin-top: 10px;
  padding: 8px 20px;
  background: linear-gradient(135deg, var(--accent-bg), var(--accent-bg-hover));
  color: var(--accent);
  text-decoration: none;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  border: 1px solid var(--accent-border);
  transition: background var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}

.tool-link:hover {
  background: linear-gradient(135deg, var(--accent-bg-hover), var(--accent-bg));
  box-shadow: 0 4px 16px rgba(74, 140, 219, 0.15);
  transform: translateY(-1px);
}

.tool-link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.link-icon {
  font-size: 1.1rem;
}

.site-link {
  display: block;
  margin-top: 8px;
  font-size: 0.82rem;
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.site-link:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

.download-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.download-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal), background var(--transition-normal);
  animation: slideInUp 0.5s ease both;
  position: relative;
  overflow: hidden;
}

.download-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.download-item:hover::before {
  opacity: 1;
}

.download-item:nth-child(1) { animation-delay: 0.08s; }
.download-item:nth-child(2) { animation-delay: 0.16s; }
.download-item:nth-child(3) { animation-delay: 0.24s; }
.download-item:nth-child(4) { animation-delay: 0.32s; }
.download-item:nth-child(5) { animation-delay: 0.4s; }
.download-item:nth-child(6) { animation-delay: 0.48s; }
.download-item:nth-child(7) { animation-delay: 0.56s; }

.download-item.hidden {
  display: none !important;
}

/* ===== 分类筛选 & 搜索 ===== */
.filter-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 18px;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  animation: fadeInUp 0.5s ease both;
  transition: background var(--transition-normal), border-color var(--transition-normal);
}

.filter-tabs {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.filter-tab {
  display: inline-flex;
  align-items: center;
  padding: 7px 16px;
  border-radius: 999px;
  border: 1.5px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.filter-tab:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-bg);
  transform: translateY(-1px);
}

.filter-tab:active {
  transform: translateY(0);
}

.filter-tab:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.filter-tab.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(74, 140, 219, 0.3);
}

.filter-tab.active:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #ffffff;
}

.filter-search {
  position: relative;
  display: flex;
  align-items: center;
  flex: 1;
  min-width: 220px;
  max-width: 320px;
}

.filter-search input {
  width: 100%;
  padding: 8px 34px 8px 32px;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: 0.85rem;
  font-family: inherit;
  transition: all var(--transition-fast);
}

.filter-search input::placeholder {
  color: var(--text-extra-light);
}

.filter-search input::-webkit-search-cancel-button,
.filter-search input::-webkit-search-decoration {
  display: none;
}

.filter-search input:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--bg-card);
  box-shadow: 0 0 0 3px rgba(74, 140, 219, 0.12);
}

.filter-search::before {
  content: '🔍';
  position: absolute;
  left: 10px;
  font-size: 0.8rem;
  opacity: 0.45;
  pointer-events: none;
  line-height: 1;
}

#searchClear {
  position: absolute;
  right: 6px;
  width: 22px;
  height: 22px;
  border: none;
  border-radius: 50%;
  background: var(--text-extra-light);
  color: var(--bg-card);
  font-size: 0.65rem;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

#searchClear:hover {
  background: var(--text-muted);
  transform: scale(1.1);
}

#searchClear:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.no-results {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 36px 18px;
  border: 1.5px dashed var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  color: var(--text-muted);
  font-size: 0.92rem;
  text-align: center;
  animation: fadeInUp 0.35s ease both;
}

.no-results-icon {
  font-size: 1.1rem;
}

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

.item-info {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  flex: 1;
  min-width: 0;
}

.item-info h2 {
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  line-height: 1.3;
  transition: color var(--transition-normal);
}

.badge {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: 0.3px;
  white-space: nowrap;
}

.badge-official {
  background: var(--accent-bg);
  color: var(--accent);
  border: 1px solid var(--accent-border);
}

.badge-featured {
  background: var(--success-bg);
  color: var(--success);
  border: 1px solid var(--success-border);
}

.badge-thirdparty {
  background: #fff7ed;
  color: #ea580c;
  border: 1px solid #fed7aa;
}

[data-theme="dark"] .badge-thirdparty {
  background: #431407;
  color: #fb923c;
  border-color: #7c2d12;
}

[data-theme="dark"] .badge-official {
  background: var(--accent-bg);
  border-color: var(--accent-border);
}

@media (max-width: 480px) {
  .badge {
    font-size: 0.65rem;
    padding: 2px 7px;
  }
}

.btn-group {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: var(--accent);
  color: #ffffff;
  text-decoration: none;
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.3px;
  transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
  border: none;
  cursor: pointer;
  font-family: inherit;
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.download-btn::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%);
  transition: width 0.5s ease, height 0.5s ease;
}

.download-btn:active::after {
  width: 200px;
  height: 200px;
}

.download-btn:hover {
  background: var(--accent-hover);
  transform: scale(1.04);
  box-shadow: var(--shadow-btn);
}

.download-btn:active {
  transform: scale(0.97);
}

.download-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.btn-icon {
  font-size: 0.85rem;
  font-weight: 700;
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  background: var(--bg-card);
  color: var(--accent);
  border: 1.5px solid var(--accent);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.3px;
  cursor: pointer;
  font-family: inherit;
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
  white-space: nowrap;
}

.copy-btn:hover {
  background: var(--accent);
  color: #ffffff;
  transform: scale(1.04);
  box-shadow: var(--shadow-btn-secondary);
  text-decoration: none;
}

.copy-btn:active {
  transform: scale(0.97);
}

.copy-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.copy-btn.copied {
  background: var(--success);
  color: #ffffff;
  border-color: var(--success);
  animation: pulse 0.3s ease;
}

.detail-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  background: var(--bg-card);
  color: var(--text-muted);
  border: 1.5px solid var(--border-color);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.3px;
  text-decoration: none;
  cursor: pointer;
  font-family: inherit;
  transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
  white-space: nowrap;
}

.detail-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-bg);
  transform: scale(1.04);
  box-shadow: var(--shadow-btn-secondary);
}

.detail-btn:active {
  transform: scale(0.97);
}

.detail-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.footer {
  text-align: center;
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--border-footer);
  animation: fadeInUp 0.6s ease 0.5s both;
}

.footer p {
  font-size: 0.82rem;
  color: var(--text-extra-light);
  line-height: 1.8;
  transition: color var(--transition-normal);
}

.tips {
  color: var(--text-ultra-light);
  font-size: 0.78rem;
}

.footer-link {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  transition: color var(--transition-fast), text-decoration var(--transition-fast);
}

.footer-link:hover {
  text-decoration: underline;
}

.footer-link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.theme-toggle {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  border: 1.5px solid var(--border-color);
  background: var(--bg-card);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
  margin-left: 4px;
  transition: background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.theme-toggle:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
}

.theme-toggle:active {
  transform: scale(0.95);
}

.theme-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.theme-icon {
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

[data-theme="dark"] .theme-icon-light {
  display: inline;
}

[data-theme="dark"] .theme-icon-dark {
  display: none;
}

.theme-icon-light {
  display: inline;
}

.theme-icon-dark {
  display: none;
}

[data-theme="dark"] .theme-icon-light {
  display: none;
}

[data-theme="dark"] .theme-icon-dark {
  display: inline;
}

.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 1000;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  border: 1.5px solid var(--border-color);
  background: var(--bg-card);
  color: var(--accent);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: var(--shadow-sm);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--transition-normal), visibility var(--transition-normal), transform var(--transition-normal), background var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
  background: var(--accent);
  color: #ffffff;
}

.back-to-top:active {
  transform: scale(0.95);
}

.back-to-top:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.back-to-top-icon {
  font-weight: 700;
  font-size: 1.1rem;
}

.toast-container {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-primary);
  pointer-events: auto;
  animation: bounceIn 0.4s ease both;
  white-space: nowrap;
  transition: background var(--transition-normal), color var(--transition-normal), border-color var(--transition-normal);
}

.toast.success {
  border-left: 3px solid var(--success);
}

.toast.error {
  border-left: 3px solid #ef4444;
}

.toast.fade-out {
  animation: fadeOut 0.35s ease both;
}

@keyframes fadeOut {
  from {
    opacity: 1;
    transform: translateY(0);
  }
  to {
    opacity: 0;
    transform: translateY(-10px);
  }
}

.toast-icon {
  font-size: 1.1rem;
}

@media (max-width: 768px) {
  .header h1 {
    font-size: 1.7rem;
  }

  .download-item {
    padding: 12px 14px;
    gap: 12px;
    flex-wrap: wrap;
  }

  .btn-group {
    width: 100%;
    flex-direction: row;
    gap: 8px;
  }

  .download-btn,
  .copy-btn,
  .detail-btn {
    flex: 1;
    justify-content: center;
    padding: 7px 10px;
    font-size: 0.8rem;
  }

  .theme-toggle {
    width: 32px;
    height: 32px;
    font-size: 0.9rem;
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 38px;
    height: 38px;
  }

  .toast {
    padding: 10px 18px;
    font-size: 0.82rem;
    white-space: normal;
    max-width: 90vw;
  }

  .filter-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .filter-search {
    width: 100%;
    max-width: none;
    min-width: 0;
  }

  .filter-tab {
    padding: 6px 13px;
    font-size: 0.82rem;
  }
}

@media (max-width: 480px) {
  body {
    padding: 20px 12px 12px;
  }

  .header h1 {
    font-size: 1.4rem;
  }

  .subtitle {
    font-size: 0.85rem;
  }

  .header-tagline {
    font-size: 0.85rem;
  }

  .download-item {
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    gap: 10px;
  }

  .item-info h2 {
    font-size: 0.95rem;
  }

  .tool-link {
    font-size: 0.78rem;
    padding: 6px 14px;
  }

  .no-results {
    padding: 26px 14px;
    font-size: 0.85rem;
  }

  .filter-search input {
    font-size: 0.82rem;
    padding: 7px 30px 7px 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

@media print {
  .theme-toggle,
  .back-to-top,
  .toast-container,
  .btn-group,
  .filter-bar,
  .no-results {
    display: none !important;
  }

  .download-item.hidden {
    display: flex !important;
  }

  body {
    background: #ffffff;
    color: #000000;
  }

  .download-item {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid #ccc;
    padding: 10px 14px;
    gap: 10px;
  }
}

.tutorial-content {
  max-width: 800px;
  margin: 0 auto;
  animation: fadeInUp 0.6s ease both;
}

.tutorial-section {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 30px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
  transition: background var(--transition-normal), border-color var(--transition-normal);
}

.tutorial-section h2 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  transition: color var(--transition-normal);
}

.tutorial-section h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 24px 0 12px;
  transition: color var(--transition-normal);
}

.tutorial-section h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
  transition: color var(--transition-normal);
}

.tutorial-section p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 10px;
  transition: color var(--transition-normal);
}

.tutorial-section code {
  background: var(--accent-bg);
  color: var(--accent);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.88rem;
  font-family: "Consolas", "Monaco", "Courier New", monospace;
  transition: background var(--transition-normal), color var(--transition-normal);
}

.tutorial-section .tool-link {
  margin-bottom: 20px;
}

.program-list {
  margin-top: 16px;
}

.program-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  margin-bottom: 10px;
  transition: background var(--transition-normal), border-color var(--transition-normal);
}

.program-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
  flex-wrap: wrap;
}

.program-header strong {
  font-size: 0.95rem;
  color: var(--text-primary);
  transition: color var(--transition-normal);
}

.program-badge {
  display: inline-block;
  background: var(--accent);
  color: #ffffff;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 10px;
  line-height: 1.5;
}

.program-file {
  font-size: 0.78rem;
  color: var(--text-muted);
  background: var(--accent-bg);
  padding: 2px 8px;
  border-radius: 4px;
  font-family: "Consolas", "Monaco", "Courier New", monospace;
  transition: background var(--transition-normal), color var(--transition-normal);
}

.program-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0;
  transition: color var(--transition-normal);
}

.step-list {
  margin: 16px 0;
}

.step-item {
  display: flex;
  gap: 14px;
  margin-bottom: 16px;
  align-items: flex-start;
}

.step-num {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 700;
  line-height: 1;
}

.step-body h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
  transition: color var(--transition-normal);
}

.step-body p {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 0;
  transition: color var(--transition-normal);
}

.tip-box {
  display: flex;
  gap: 12px;
  background: var(--accent-bg);
  border: 1px solid var(--accent-border);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  margin-top: 20px;
  transition: background var(--transition-normal), border-color var(--transition-normal);
}

.tip-icon {
  font-size: 1.3rem;
  flex-shrink: 0;
  line-height: 1.4;
}

.tip-body strong {
  display: block;
  font-size: 0.92rem;
  color: var(--text-primary);
  margin-bottom: 4px;
  transition: color var(--transition-normal);
}

.tip-body p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0;
  transition: color var(--transition-normal);
}

.file-list {
  margin: 8px 0 12px;
  padding-left: 20px;
}

.file-list li {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 6px;
  line-height: 1.6;
  transition: color var(--transition-normal);
}

.file-list code {
  background: var(--accent-bg);
  color: var(--accent);
  padding: 1px 6px;
  border-radius: 3px;
  font-size: 0.85rem;
  font-family: "Consolas", "Monaco", "Courier New", monospace;
}

.cli-examples h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 16px 0 8px;
  transition: color var(--transition-normal);
}

.code-block {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  margin-bottom: 4px;
  overflow-x: auto;
  transition: background var(--transition-normal), border-color var(--transition-normal);
}

.code-block code {
  font-size: 0.85rem;
  color: var(--text-primary);
  background: none;
  padding: 0;
  white-space: nowrap;
  transition: color var(--transition-normal);
}

.code-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 12px;
  transition: color var(--transition-normal);
}

@media (max-width: 768px) {
  .top-nav {
    flex-direction: column;
    gap: 10px;
    padding: 12px 16px;
    margin-bottom: 16px;
  }

  .nav-left,
  .nav-right {
    width: 100%;
    justify-content: center;
  }

  .nav-brand {
    justify-content: center;
  }

  .nav-title {
    font-size: 0.9rem;
  }

  .tutorial-section {
    padding: 24px 18px;
  }

  .tutorial-section h2 {
    font-size: 1.15rem;
  }

  .step-num {
    width: 28px;
    height: 28px;
    font-size: 0.8rem;
  }
}

/* ===== 系统镜像详情页 detail.html ===== */
.detail-page {
  max-width: 820px;
  margin: 0 auto;
  animation: fadeInUp 0.6s ease both;
}

.detail-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
  text-decoration: none;
  margin-bottom: 20px;
  transition: color var(--transition-fast);
}

.detail-back:hover {
  color: var(--accent);
  text-decoration: underline;
}

.detail-back:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

.detail-hero {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
  text-align: center;
  animation: fadeInUp 0.6s ease both;
  transition: background var(--transition-normal), border-color var(--transition-normal);
}

.detail-hero .badge {
  margin-bottom: 12px;
  font-size: 0.78rem;
  padding: 3px 12px;
}

.detail-hero h1 {
  font-size: 1.9rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.5px;
  margin-bottom: 6px;
  transition: color var(--transition-normal);
}

.detail-hero .detail-hero-sub {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.detail-hero .btn-group {
  justify-content: center;
  flex-wrap: wrap;
}

.detail-specs {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 24px;
}

.detail-spec {
  flex: 1 1 150px;
  min-width: 130px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  transition: background var(--transition-normal), border-color var(--transition-normal);
}

.detail-spec-label {
  font-size: 0.72rem;
  color: var(--text-extra-light);
  font-weight: 600;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.detail-spec-value {
  font-size: 0.9rem;
  color: var(--text-primary);
  font-weight: 700;
}

.detail-spec-sha {
  flex: 1 1 100%;
}

.detail-spec-sha .sha256-code {
  display: block;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 0.72rem;
  font-weight: 400;
  color: var(--accent);
  font-family: "Consolas", "Monaco", "Courier New", monospace;
  word-break: break-all;
  line-height: 1.5;
  transition: background var(--transition-normal), color var(--transition-normal), border-color var(--transition-normal);
}

.detail-sha-copy-row {
  display: flex;
  justify-content: center;
  margin-top: 12px;
  gap: 10px;
}

.detail-section {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 26px 28px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
  animation: fadeInUp 0.6s ease both;
  transition: background var(--transition-normal), border-color var(--transition-normal);
}

.detail-section h2 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 14px;
  transition: color var(--transition-normal);
}

.detail-section p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 8px;
  transition: color var(--transition-normal);
}

.detail-section p:last-child {
  margin-bottom: 0;
}

.detail-link-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  padding: 10px 14px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
  transition: background var(--transition-normal), border-color var(--transition-normal);
}

.detail-link-row:last-child {
  margin-bottom: 0;
}

.detail-link-row-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  min-width: 110px;
}

.detail-link-row code {
  flex: 1;
  min-width: 0;
  background: var(--accent-bg);
  color: var(--accent);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.8rem;
  font-family: "Consolas", "Monaco", "Courier New", monospace;
  word-break: break-all;
  transition: background var(--transition-normal), color var(--transition-normal);
}

.detail-link-row .copy-btn {
  flex-shrink: 0;
}

.detail-list {
  margin: 0;
  padding-left: 20px;
}

.detail-list li {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 6px;
  line-height: 1.6;
  transition: color var(--transition-normal);
}

.detail-not-found {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding: 60px 20px;
  text-align: center;
  animation: fadeInUp 0.4s ease both;
}

.detail-not-found-icon {
  font-size: 2.4rem;
}

.detail-not-found h1 {
  font-size: 1.2rem;
  color: var(--text-primary);
}

.detail-not-found p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.detail-not-found .detail-back {
  margin-bottom: 0;
}

@media (max-width: 768px) {
  .detail-hero {
    padding: 28px 20px;
  }

  .detail-hero h1 {
    font-size: 1.5rem;
  }

  .detail-section {
    padding: 20px 18px;
  }

  .detail-spec {
    flex: 1 1 40%;
  }

  .detail-spec-sha {
    flex: 1 1 100%;
  }

  .detail-link-row {
    flex-direction: column;
    align-items: stretch;
  }

  .detail-link-row-label {
    min-width: 0;
  }
}