*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --primary: #6366f1;
  --primary-light: #818cf8;
  --primary-dark: #4f46e5;
  --secondary: #64748b;
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --info: #3b82f6;
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --border-color: #e2e8f0;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --radius: 8px;
  --radius-lg: 12px;
}

body {
  background: var(--bg-main) !important;
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

.v-application {
  background: var(--bg-main) !important;
}

.v-application__wrap {
  min-height: 100vh;
}

.page-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 16px;
}

.page-header {
  text-align: center;
  margin-bottom: 32px;
}

.page-header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.page-header p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.section-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 8px;
}

.section-title .v-icon {
  font-size: 1.25rem;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
  margin-bottom: 32px;
  overflow: visible;
}

.v-main {
  overflow: visible !important;
}

.v-application__wrap {
  overflow: visible !important;
}

.tool-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 16px 12px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  display: block;
}

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

.tool-card .tool-icon {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 10px;
  background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
}

.tool-card:hover .tool-icon {
  background: linear-gradient(135deg, #eef2ff 0%, #e0e7ff 100%);
}

.tool-card .v-icon {
  font-size: 24px !important;
}

.tool-card h3 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
  line-height: 1.3;
}

.tool-card p {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
}

.feature-card .v-icon {
  font-size: 32px !important;
  margin-bottom: 12px;
}

.feature-card h3 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.5;
}

.tool-workspace {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 24px;
}

.info-section {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
}

.info-section h3 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.info-section p,
.info-section li {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.info-section ul {
  margin: 0;
  padding-left: 20px;
}

.code-block {
  background: #1e293b;
  border-radius: 6px;
  padding: 12px 16px;
  margin: 8px 0;
  overflow-x: auto;
}

.code-block code {
  color: #e2e8f0;
  font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
  font-size: 0.8125rem;
  line-height: 1.5;
}

.usage-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 12px;
}

.usage-item {
  background: #f8fafc;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 12px;
}

.usage-item h4 {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.usage-item code {
  display: block;
  background: #1e293b;
  color: #e2e8f0;
  padding: 8px 10px;
  border-radius: 4px;
  font-size: 0.75rem;
  margin-bottom: 4px;
  overflow-x: auto;
  font-family: 'SF Mono', Monaco, monospace;
}

.usage-item p {
  font-size: 0.6875rem;
  color: var(--text-secondary);
  margin: 0;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  font-size: 0.875rem;
}

.breadcrumb a {
  color: var(--primary);
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

.breadcrumb span {
  color: var(--text-secondary);
}

@media (max-width: 768px) {
  .page-container {
    padding: 16px 12px;
  }
  
  .tool-grid {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 10px;
  }
  
  .tool-card {
    padding: 12px 10px;
  }
  
  .tool-card .tool-icon {
    width: 36px;
    height: 36px;
  }
  
  .tool-card .v-icon {
    font-size: 20px !important;
  }
  
  .tool-card h3 {
    font-size: 0.8125rem;
  }
  
  .tool-card p {
    font-size: 0.6875rem;
  }
}

.seo-content {
  margin-top: 40px;
  padding: 24px;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.seo-section {
  margin-bottom: 32px;
}

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

.seo-section h2 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 16px 0;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--border-color);
}

.seo-section h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 20px 0 8px 0;
}

.seo-section p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-secondary);
  margin: 0 0 12px 0;
}

.seo-section ul {
  margin: 0;
  padding-left: 24px;
}

.seo-section li {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.seo-section li strong {
  color: var(--text-primary);
}

.seo-section .intro-text {
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.6;
}

.seo-section h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 24px 0 12px 0;
  padding-left: 12px;
  border-left: 3px solid var(--primary);
}

.example-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.example-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  background: var(--bg-main);
  border-radius: 6px;
  border: 1px solid var(--border-color);
}

.example-title {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.example-value {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary);
}

.unit-categories {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.category-item {
  padding: 16px;
  background: var(--bg-main);
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.category-item h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 8px 0;
}

.category-item p {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.6;
}

.formula-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.formula-item {
  padding: 16px;
  background: var(--bg-main);
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.formula-item h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 8px 0;
}

.formula-item ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.formula-item li {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  padding: 4px 0;
  border-bottom: 1px dashed var(--border-color);
}

.formula-item li:last-child {
  border-bottom: none;
}

.scene-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.scene-item {
  padding: 16px;
  background: var(--bg-main);
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.scene-item h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 8px 0;
}

.scene-item p {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.6;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 16px;
}

.faq-item {
  padding: 16px;
  background: var(--bg-main);
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.faq-item h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 8px 0;
}

.faq-item p {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.6;
}

@media (max-width: 768px) {
  .example-grid {
    grid-template-columns: 1fr;
  }

  .unit-categories {
    grid-template-columns: 1fr;
  }

  .formula-list {
    grid-template-columns: 1fr;
  }

  .scene-grid {
    grid-template-columns: 1fr;
  }
}

/* SEO Content Styles - 用于所有工具的 SEO 内容 */
.seo-content {
  margin-top: 40px;
}

.seo-content .info-section {
  margin-bottom: 40px;
  padding: 28px;
  background: white;
  border-radius: 16px;
  border: 1px solid #e2e8f0;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  transition: box-shadow 0.3s ease;
}

.seo-content .info-section:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.seo-content .info-section h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: #1e293b;
  margin: 0 0 20px 0;
  padding-left: 16px;
  border-left: 4px solid #6366f1;
  line-height: 1.3;
}

.seo-content .info-section h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: #334155;
  margin: 24px 0 14px 0;
}

.seo-content .info-section p {
  color: #64748b;
  line-height: 1.8;
  margin: 0 0 12px 0;
  font-size: 0.9375rem;
}

.seo-content .info-section ul {
  color: #64748b;
  line-height: 1.8;
  margin: 0;
  padding-left: 24px;
}

.seo-content .info-section li {
  margin-bottom: 10px;
}

.seo-content .info-section li strong {
  color: #334155;
}

/* 代码示例样式 */
.seo-content .code-examples {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 20px;
}

.seo-content .code-example {
  background: linear-gradient(180deg, #1e293b 0%, #0f172a 100%);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid #334155;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.seo-content .code-example:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.seo-content .code-example h4 {
  padding: 14px 18px;
  margin: 0;
  font-size: 0.875rem;
  color: #e2e8f0;
  background: linear-gradient(90deg, #334155 0%, #475569 100%);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

.seo-content .code-example h4::before {
  content: '';
  width: 8px;
  height: 8px;
  background: #10b981;
  border-radius: 50%;
}

.seo-content .code-example pre {
  margin: 0;
  padding: 18px;
  overflow-x: auto;
  white-space: pre;
  overflow-y: hidden;
}

.seo-content .code-example code {
  font-family: 'Fira Code', 'JetBrains Mono', 'SF Mono', Monaco, monospace;
  font-size: 13px;
  color: #e2e8f0;
  line-height: 1.7;
  white-space: pre;
  display: block;
  min-width: max-content;
}

/* 使用场景卡片 */
.seo-content .use-cases {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 16px;
}

.seo-content .use-case {
  padding: 20px;
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  border-radius: 12px;
  border: 1px solid #e2e8f0;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.seo-content .use-case:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.1);
  border-color: #6366f1;
}

.seo-content .use-case h4 {
  font-size: 1rem;
  font-weight: 600;
  color: #334155;
  margin: 0 0 10px 0;
}

.seo-content .use-case p {
  font-size: 0.875rem;
  color: #64748b;
  margin: 0;
  line-height: 1.6;
}

/* FAQ 列表 */
.seo-content .faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.seo-content .faq-item {
  padding: 20px;
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  border-radius: 12px;
  border: 1px solid #e2e8f0;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.seo-content .faq-item:hover {
  border-color: #6366f1;
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.1);
}

.seo-content .faq-item h4 {
  font-size: 1rem;
  font-weight: 600;
  color: #334155;
  margin: 0 0 10px 0;
}

.seo-content .faq-item p {
  font-size: 0.9375rem;
  color: #64748b;
  margin: 0;
  line-height: 1.7;
}

/* 算法卡片 (Hash Generator) */
.seo-content .algorithm-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.seo-content .algo-card {
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid #e2e8f0;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.seo-content .algo-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.seo-content .algo-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 18px;
  color: white;
}

.seo-content .algo-header.md5 { background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%); }
.seo-content .algo-header.sha1 { background: linear-gradient(135deg, #f97316 0%, #ea580c 100%); }
.seo-content .algo-header.sha256 { background: linear-gradient(135deg, #10b981 0%, #059669 100%); }
.seo-content .algo-header.sha384 { background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%); }
.seo-content .algo-header.sha512 { background: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%); }

.seo-content .algo-name {
  font-weight: 700;
  font-size: 1rem;
}

.seo-content .algo-bits {
  font-size: 0.75rem;
  opacity: 0.9;
  font-weight: 500;
}

.seo-content .algo-body {
  padding: 14px 18px;
}

.seo-content .algo-body p {
  font-size: 0.875rem;
  margin: 0 0 10px 0;
  line-height: 1.6;
}

.seo-content .algo-status {
  font-size: 0.75rem;
  padding: 5px 10px;
  border-radius: 6px;
  display: inline-block;
  font-weight: 500;
}

.seo-content .algo-status.warning {
  background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
  color: #92400e;
}

.seo-content .algo-status.safe {
  background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
  color: #065f46;
}

/* 哈希示例表格 */
.seo-content .hash-examples {
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid #e2e8f0;
}

.seo-content .hash-row {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 16px;
  padding: 14px 18px;
  border-bottom: 1px solid #e2e8f0;
  align-items: center;
}

.seo-content .hash-row:last-child {
  border-bottom: none;
}

.seo-content .hash-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: #64748b;
}

.seo-content .hash-input {
  font-family: 'Fira Code', monospace;
  font-size: 0.875rem;
  color: #334155;
}

.seo-content .hash-value {
  font-family: 'Fira Code', monospace;
  font-size: 0.75rem;
  color: #6366f1;
  word-break: break-all;
  background: linear-gradient(135deg, #eef2ff 0%, #e0e7ff 100%);
  padding: 4px 10px;
  border-radius: 6px;
}

/* UUID 版本卡片 */
.seo-content .version-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.seo-content .version-card {
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid #e2e8f0;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.seo-content .version-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.seo-content .version-header {
  padding: 14px 18px;
  background: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%);
  color: white;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.seo-content .version-title {
  font-weight: 700;
  font-size: 1rem;
}

.seo-content .version-tag {
  font-size: 0.75rem;
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 12px;
}

.seo-content .version-body {
  padding: 14px 18px;
}

.seo-content .version-body p {
  font-size: 0.875rem;
  margin: 0 0 10px 0;
  line-height: 1.6;
}

.seo-content .uuid-text {
  font-family: 'Fira Code', monospace;
  font-size: 1.25rem;
  color: #a5b4fc;
  background: linear-gradient(180deg, #1e293b 0%, #0f172a 100%);
  padding: 14px 28px;
  border-radius: 10px;
  border: 1px solid #334155;
}

/* JWT 结构 */
.seo-content .jwt-structure {
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  border-radius: 12px;
  padding: 20px;
  border: 1px solid #e2e8f0;
}

.seo-content .structure-example {
  text-align: center;
  margin-bottom: 20px;
}

.seo-content .structure-parts {
  display: flex;
  gap: 4px;
  justify-content: center;
  flex-wrap: wrap;
}

.seo-content .structure-part {
  padding: 8px 16px;
  border-radius: 6px;
  font-family: 'Fira Code', monospace;
  font-size: 0.875rem;
}

.seo-content .structure-part.header {
  background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
  color: #78350f;
}

.seo-content .structure-part.payload {
  background: linear-gradient(135deg, #a78bfa 0%, #8b5cf6 100%);
  color: white;
}

.seo-content .structure-part.signature {
  background: linear-gradient(135deg, #34d399 0%, #10b981 100%);
  color: #064e3b;
}

.seo-content .structure-part.dots {
  color: #64748b;
  padding: 8px 4px;
}

/* JWT 结构详情卡片 */
.seo-content .structure-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.seo-content .structure-card {
  background: white;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid #e2e8f0;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.seo-content .structure-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.seo-content .structure-card-header {
  padding: 14px 18px;
  font-weight: 600;
  color: white;
}

.seo-content .structure-card-header.header { background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%); }
.seo-content .structure-card-header.payload { background: linear-gradient(135deg, #a78bfa 0%, #8b5cf6 100%); }
.seo-content .structure-card-header.signature { background: linear-gradient(135deg, #34d399 0%, #10b981 100%); }

.seo-content .structure-card-body {
  padding: 14px 18px;
}

.seo-content .structure-card-body p {
  font-size: 0.875rem;
  margin: 0 0 12px 0;
  line-height: 1.6;
}

.seo-content .structure-card-body ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.seo-content .structure-card-body li {
  font-size: 0.8125rem;
  color: #64748b;
  padding: 6px 0;
  border-bottom: 1px solid #f1f5f9;
}

.seo-content .structure-card-body li:last-child {
  border-bottom: none;
}

.seo-content .structure-card-body li strong {
  color: #334155;
}

/* 算法卡片网格 */
.seo-content .algorithm-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.seo-content .algo-card-item {
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  border-radius: 12px;
  padding: 16px;
  border: 1px solid #e2e8f0;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.seo-content .algo-card-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.seo-content .algo-card-item h4 {
  font-size: 1rem;
  font-weight: 600;
  color: #334155;
  margin: 0 0 8px 0;
}

.seo-content .algo-card-item p {
  font-size: 0.8125rem;
  color: #64748b;
  margin: 0;
  line-height: 1.5;
}

/* 正则表达式示例 */
.seo-content .regex-examples {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.seo-content .example-item {
  display: grid;
  grid-template-columns: 140px 1fr auto;
  gap: 16px;
  align-items: center;
  padding: 14px 18px;
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  border-radius: 10px;
  border: 1px solid #e2e8f0;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.seo-content .example-item:hover {
  border-color: #6366f1;
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.1);
}

.seo-content .example-item h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: #334155;
  margin: 0;
}

.seo-content .example-item code {
  font-family: 'Fira Code', 'JetBrains Mono', monospace;
  font-size: 0.875rem;
  color: #6366f1;
  background: linear-gradient(135deg, #eef2ff 0%, #e0e7ff 100%);
  padding: 6px 12px;
  border-radius: 6px;
  word-break: break-all;
  margin: 0;
}

.seo-content .example-item p {
  font-size: 0.8125rem;
  color: #94a3b8;
  margin: 0;
  white-space: nowrap;
}

/* 语法表格 */
.seo-content .syntax-table {
  overflow-x: auto;
}

.seo-content .syntax-table table {
  width: 100%;
  border-collapse: collapse;
}

.seo-content .syntax-table th,
.seo-content .syntax-table td {
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid #e2e8f0;
}

.seo-content .syntax-table th {
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  font-weight: 600;
  color: #334155;
}

.seo-content .syntax-table td {
  color: #64748b;
}

.seo-content .syntax-table code {
  padding: 4px 10px;
  background: linear-gradient(135deg, #eef2ff 0%, #e0e7ff 100%);
  border-radius: 6px;
  font-family: 'Fira Code', monospace;
  font-size: 13px;
  color: #7c3aed;
}

/* 颜色转换器样式 */
.seo-content .format-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.seo-content .format-item {
  padding: 20px;
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  border-radius: 12px;
  border: 1px solid #e2e8f0;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.seo-content .format-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.seo-content .format-item .example {
  margin-top: 14px;
  padding: 10px 14px;
  background: linear-gradient(135deg, #eef2ff 0%, #e0e7ff 100%);
  border-radius: 8px;
  font-family: 'Fira Code', monospace;
  font-size: 0.875rem;
  color: #475569;
}

.seo-content .conversion-examples {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.seo-content .example-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px;
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  border-radius: 12px;
  border: 1px solid #e2e8f0;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.seo-content .example-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.seo-content .example-color {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.seo-content .example-info h4 {
  font-size: 0.875rem;
  font-weight: 600;
  color: #1e293b;
  margin: 0 0 6px 0;
}

.seo-content .example-info p {
  font-size: 0.75rem;
  color: #64748b;
  margin: 2px 0;
  font-family: 'Fira Code', monospace;
}

/* 时间戳样式 */
.seo-content .timestamp-examples {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.seo-content .timestamp-row {
  display: grid;
  grid-template-columns: 120px 1fr auto;
  gap: 16px;
  align-items: center;
  padding: 14px 18px;
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  border-radius: 10px;
  border: 1px solid #e2e8f0;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.seo-content .timestamp-row:hover {
  border-color: #6366f1;
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.1);
}

.seo-content .lang-name {
  font-weight: 600;
  color: #334155;
  font-size: 0.9375rem;
}

.seo-content .lang-code {
  font-family: 'Fira Code', 'JetBrains Mono', monospace;
  font-size: 0.875rem;
  color: #6366f1;
  background: linear-gradient(135deg, #eef2ff 0%, #e0e7ff 100%);
  padding: 6px 12px;
  border-radius: 6px;
}

.seo-content .lang-desc {
  font-size: 0.8125rem;
  color: #94a3b8;
  white-space: nowrap;
}

/* JSON 格式化工具样式 */
.seo-content .data-types {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
}

.seo-content .type-card {
  padding: 16px;
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  border-radius: 12px;
  text-align: center;
  border: 1px solid #e2e8f0;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.seo-content .type-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.seo-content .type-name {
  font-size: 0.875rem;
  font-weight: 600;
  color: #334155;
  margin-bottom: 6px;
}

.seo-content .type-example {
  font-family: 'Fira Code', monospace;
  font-size: 0.75rem;
  color: #6366f1;
  margin-bottom: 6px;
  background: linear-gradient(135deg, #eef2ff 0%, #e0e7ff 100%);
  padding: 4px 8px;
  border-radius: 4px;
}

.seo-content .type-desc {
  font-size: 0.75rem;
  color: #94a3b8;
}

.seo-content .format-example {
  display: flex;
  align-items: center;
  gap: 20px;
}

.seo-content .example-side {
  flex: 1;
}

.seo-content .example-side h4 {
  font-size: 0.875rem;
  color: #64748b;
  margin: 0 0 10px 0;
  font-weight: 500;
}

.seo-content .example-side pre {
  margin: 0;
  padding: 18px;
  background: linear-gradient(180deg, #1e293b 0%, #0f172a 100%);
  border-radius: 12px;
  overflow-x: auto;
  border: 1px solid #334155;
}

.seo-content .example-side code {
  font-family: 'Fira Code', 'JetBrains Mono', monospace;
  font-size: 13px;
  color: #e2e8f0;
  line-height: 1.7;
}

.seo-content .example-arrow {
  font-size: 1.5rem;
  color: #6366f1;
}

.seo-content .syntax-rules {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 10px;
}

.seo-content .rule-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  border-radius: 8px;
  border: 1px solid #e2e8f0;
  transition: border-color 0.2s ease;
}

.seo-content .rule-item:hover {
  border-color: #6366f1;
}

.seo-content .rule-icon {
  color: #10b981;
  font-weight: 700;
  font-size: 1rem;
}

.seo-content .rule-text {
  font-size: 0.875rem;
  color: #475569;
}

/* Base64 原理步骤 */
.seo-content .principle-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.seo-content .step-item {
  padding: 16px;
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  border-radius: 12px;
  border: 1px solid #e2e8f0;
  text-align: center;
}

.seo-content .step-number {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.875rem;
  margin: 0 auto 12px;
}

.seo-content .step-item h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: #334155;
  margin: 0 0 8px 0;
}

.seo-content .step-item p {
  font-size: 0.8125rem;
  color: #64748b;
  margin: 0;
  line-height: 1.5;
}

/* URL 编码示例 */
.seo-content .char-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.seo-content .char {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  border-radius: 8px;
  font-size: 0.875rem;
  border: 1px solid #e2e8f0;
  transition: border-color 0.2s ease;
}

.seo-content .char:hover {
  border-color: #6366f1;
}

.seo-content .example-encoded {
  font-family: 'Fira Code', monospace;
  font-size: 0.875rem;
  color: #6366f1;
  word-break: break-all;
  background: linear-gradient(135deg, #eef2ff 0%, #e0e7ff 100%);
  padding: 4px 10px;
  border-radius: 6px;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .seo-content .info-section {
    padding: 20px;
  }
  
  .seo-content .info-section h2 {
    font-size: 1.25rem;
  }
  
  .seo-content .code-examples {
    grid-template-columns: 1fr;
  }
  
  .seo-content .format-example {
    flex-direction: column;
  }
  
  .seo-content .example-arrow {
    transform: rotate(90deg);
  }
  
  .seo-content .timestamp-row {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  
  .seo-content .lang-desc {
    justify-self: start;
  }
  
  .seo-content .hash-row {
    grid-template-columns: 1fr;
    gap: 4px;
  }
  
  .seo-content .example-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  
  .seo-content .example-item p {
    white-space: normal;
  }
}

/* Navbar Styles */
.navbar {
  background: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.navbar-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: white;
  font-weight: 700;
  font-size: 1.25rem;
}

.navbar-brand .brand-icon {
  font-size: 28px;
}

.navbar-brand .brand-text {
  background: linear-gradient(90deg, #fff 0%, #e0e7ff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.navbar-menu {
  display: flex;
  align-items: center;
  gap: 8px;
}

.navbar-menu .nav-item {
  position: relative;
}

.navbar-menu .nav-link {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: 8px;
  transition: all 0.2s;
}

.navbar-menu .nav-link:hover {
  background: rgba(255, 255, 255, 0.15);
  color: white;
}

.navbar-menu .nav-link .mdi:first-child {
  font-size: 18px;
}

.navbar-menu .dropdown-arrow {
  font-size: 18px;
  transition: transform 0.2s;
}

.navbar-menu .nav-item:hover .dropdown-arrow {
  transform: rotate(180deg);
}

.navbar-menu .dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  background: white;
  border-radius: 12px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
  padding: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.2s;
}

.navbar-menu .nav-item:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.navbar-menu .dropdown-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  color: #374151;
  text-decoration: none;
  font-size: 0.9rem;
  border-radius: 8px;
  transition: all 0.15s;
}

.navbar-menu .dropdown-item:hover {
  background: #f3f4f6;
  color: #6366f1;
}

.navbar-menu .dropdown-item .mdi {
  font-size: 18px;
  color: #6366f1;
}

/* Mobile Menu */
.mobile-menu-details {
  display: none;
}

.mobile-menu-btn {
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: white;
  padding: 8px 12px;
  border-radius: 8px;
  cursor: pointer;
  list-style: none;
}

.mobile-menu-btn::-webkit-details-marker {
  display: none;
}

.mobile-menu-btn .mdi {
  font-size: 24px;
}

.mobile-menu-details[open] .mobile-menu-btn {
  background: rgba(255, 255, 255, 0.2);
}

.mobile-menu {
  position: absolute;
  top: 60px;
  left: 0;
  right: 0;
  background: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%);
  padding: 16px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.mobile-category-details {
  margin-bottom: 8px;
}

.mobile-category-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  color: white;
  font-weight: 500;
  cursor: pointer;
  list-style: none;
}

.mobile-category-header::-webkit-details-marker {
  display: none;
}

.mobile-category-header .mdi:last-child {
  margin-left: auto;
  transition: transform 0.2s;
}

.mobile-category-details[open] .mobile-category-header .mdi:last-child {
  transform: rotate(180deg);
}

.mobile-tools {
  padding: 8px 0 0 0;
}

.mobile-tool-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px 10px 40px;
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  font-size: 0.9rem;
}

.mobile-tool-link:hover {
  color: white;
  background: rgba(255, 255, 255, 0.1);
}

@media (max-width: 900px) {
  .navbar-menu {
    display: none;
  }

  .mobile-menu-details {
    display: block;
  }
}