:root {
  --bg-primary: #FFFFFF;
  --bg-secondary: #F8FAFC;
  --bg-card: #FFFFFF;
  --text-primary: #0F172A;
  --text-secondary: #64748B;
  --text-muted: #94A3B8;
  --border: #E2E8F0;
  --accent: #3B82F6;
  --accent-hover: #2563EB;
  --accent-light: rgba(59, 130, 246, 0.08);
  --success: #10B981;
  --purple: #8B5CF6;
  --orange: #F59E0B;
  --warning: #F59E0B;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
  --radius: 16px;
  --radius-sm: 10px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #0F172A;
    --bg-secondary: #1E293B;
    --bg-card: #1E293B;
    --text-primary: #F1F5F9;
    --text-secondary: #94A3B8;
    --text-muted: #64748B;
    --border: #334155;
    --accent-light: rgba(59, 130, 246, 0.15);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
  }
}

.hero-screenshot {
  margin-top: 60px;
  position: relative;
  z-index: 1;
  padding: 0 20px;
}

.hero-screenshot img {
  width: 100%;
  max-width: 1000px;
  border-radius: 12px;
  box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.15), 0 0 2px rgba(0, 0, 0, 0.1);
  border: 4px solid rgba(255, 255, 255, 0.5);
  display: block;
  margin: 0 auto;
  transition: transform 0.3s ease;
}

.hero-screenshot:hover img {
  transform: translateY(-5px);
  box-shadow: 0 30px 60px -12px rgba(0, 0, 0, 0.2), 0 0 4px rgba(0, 0, 0, 0.1);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg-secondary);
  color: var(--text-primary);
  line-height: 1.7;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

header {
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border);
  padding: 16px 24px;
}

header.fixed {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 0;
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.logo {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--accent);
}

.nav-cta .btn {
  padding: 8px 18px;
  font-size: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s;
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: var(--accent);
  color: white;
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

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

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

.btn svg {
  width: 18px;
  height: 18px;
}

h1 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 8px;
}

h2 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 8px;
}

h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
}

.subtitle,
.update-time {
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 32px;
}

.tagline {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 28px;
  line-height: 1.6;
}

.section {
  padding: 64px 0;
}

.section-title {
  text-align: center;
  margin-bottom: 40px;
}

.section-title h2 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 8px;
}

.section-title p {
  color: var(--text-secondary);
  font-size: 16px;
}

.card,
.intro,
.notice {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.intro {
  padding: 20px 24px;
  margin-bottom: 32px;
  color: var(--text-secondary);
  font-size: 15px;
}

.notice {
  max-width: 720px;
  margin: 0 auto;
}

.notice h3 {
  font-size: 16px;
  margin-bottom: 12px;
}

.notice p,
.notice li {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.notice ul {
  padding-left: 18px;
  margin-top: 12px;
}

.notice li {
  margin-bottom: 6px;
}

.highlight {
  background: rgba(59, 130, 246, 0.08);
  border-left: 3px solid var(--accent);
  padding: 12px 16px;
  border-radius: 0 8px 8px 0;
  margin: 12px 0;
}

.emphasis {
  background: rgba(245, 158, 11, 0.08);
  border-left: 3px solid var(--warning);
  padding: 12px 16px;
  border-radius: 0 8px 8px 0;
  margin: 12px 0;
}

.warning-box {
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.3);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 24px;
}

.warning-box h3 {
  color: var(--warning);
  font-size: 15px;
  margin-bottom: 8px;
}

.warning-box p {
  font-size: 14px;
  color: var(--text-secondary);
}

.content-section {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 16px;
}

.content-section h2 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
}

.content-section p,
.content-section li {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.content-section ul,
.content-section ol {
  padding-left: 20px;
}

.content-section li {
  margin-bottom: 6px;
}

footer {
  padding: 32px 0;
  border-top: 1px solid var(--border);
  background: var(--bg-primary);
  text-align: center;
}

footer.simple {
  border-top: none;
  background: transparent;
  max-width: 800px;
  margin: 0 auto;
  padding: 24px;
}

.footer-links {
  margin-bottom: 12px;
}

.footer-links a,
footer a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  margin: 0 12px;
}

.footer-links a:hover,
footer a:hover {
  color: var(--accent);
}

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

@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }
}

@media (max-width: 640px) {
  .nav-links {
    display: none;
  }

  h1 {
    font-size: 28px;
  }

  .tagline {
    font-size: 16px;
  }

  .section {
    padding: 48px 0;
  }
}

#dynamic-content h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

#dynamic-content h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-top: 2rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

#dynamic-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

#dynamic-content p {
  margin-bottom: 1rem;
  line-height: 1.8;
}

#dynamic-content ul,
#dynamic-content ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

#dynamic-content li {
  margin-bottom: 0.5rem;
  line-height: 1.7;
}

#dynamic-content li ul,
#dynamic-content li ol {
  margin-top: 0.5rem;
  margin-bottom: 0.5rem;
}

#dynamic-content a {
  color: var(--accent);
  text-decoration: none;
}

#dynamic-content a:hover {
  text-decoration: underline;
}

#dynamic-content code {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: "SF Mono", "Fira Code", "Consolas", monospace;
  font-size: 0.875em;
  color: var(--accent);
}

#dynamic-content pre {
  background: #1e293b;
  border-radius: 8px;
  padding: 16px 20px;
  margin: 1rem 0;
  overflow-x: auto;
  border: 1px solid #334155;
}

#dynamic-content pre code {
  background: none;
  border: none;
  padding: 0;
  color: #e2e8f0;
  font-size: 0.875rem;
  line-height: 1.6;
}

@media (prefers-color-scheme: dark) {
  #dynamic-content pre {
    background: #0f172a;
    border-color: #334155;
  }

  #dynamic-content pre code {
    color: #e2e8f0;
  }

  #dynamic-content code {
    background: #1e293b;
    border-color: #334155;
  }
}

#dynamic-content blockquote {
  border-left: 4px solid var(--border);
  padding: 12px 16px;
  margin: 1rem 0;
  background: var(--bg-secondary);
  border-radius: 0 8px 8px 0;
}

#dynamic-content blockquote p {
  margin: 0;
}

#dynamic-content blockquote p + p {
  margin-top: 0.5rem;
}

#dynamic-content .callout-note,
#dynamic-content .callout-tip {
  border-left-color: var(--accent);
  background: rgba(59, 130, 246, 0.08);
}

#dynamic-content .callout-warning,
#dynamic-content .callout-important {
  border-left-color: var(--warning);
  background: rgba(245, 158, 11, 0.1);
}

#dynamic-content .callout-caution {
  border-left-color: #ef4444;
  background: rgba(239, 68, 68, 0.08);
}

#dynamic-content .alert-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  margin-bottom: 8px;
}

#dynamic-content .alert-title.note { color: var(--accent); }
#dynamic-content .alert-title.tip { color: #10b981; }
#dynamic-content .alert-title.warning { color: var(--warning); }
#dynamic-content .alert-title.important { color: var(--warning); }
#dynamic-content .alert-title.caution { color: #ef4444; }

#dynamic-content .table-wrapper {
  overflow-x: auto;
  margin: 1rem 0;
}

#dynamic-content table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

#dynamic-content th,
#dynamic-content td {
  padding: 10px 14px;
  text-align: left;
  border: 1px solid var(--border);
}

#dynamic-content th {
  background: var(--bg-secondary);
  font-weight: 600;
}

#dynamic-content tr:hover {
  background: var(--bg-secondary);
}

#dynamic-content .update-time {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

#dynamic-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}

#dynamic-content img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin: 1rem 0;
}