:root {
      --primary: #1D7BFF;
      --primary-hover: #0056cc;
      --accent: #00D2FF;
      --deep-bg: #070913;
      --text-light: #F3F4F6;
      --text-dark: #0B0F19;
      --text-muted: #9CA3AF;
      --body-bg: #F3F4F6;
      --card-bg: #FFFFFF;
      --theme-color: rgb(0,0,0);
      --border: #E5E7EB;
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; background-color: var(--body-bg); color: var(--text-dark); line-height: 1.6; }
    a { text-decoration: none; color: inherit; transition: all 0.3s ease; }

    
    .site-header { background-color: var(--theme-color); border-bottom: 1px solid rgba(255,255,255,0.1); position: sticky; top: 0; z-index: 100; height: 70px; display: flex; align-items: center; }
    .header-container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; display: flex; justify-content: space-between; align-items: center; }
    .logo { display: inline-flex; align-items: center; gap: 12px; }
    .logo img { display: block; height: 40px; width: auto; max-width: 160px; object-fit: contain; flex-shrink: 0; }
    .logo span { display: inline-block; font-size: 18px; font-weight: 800; color: #FFFFFF; white-space: nowrap; }
    .desktop-nav { display: flex; gap: 24px; }
    .desktop-nav a { color: rgba(255,255,255,0.8); font-size: 15px; font-weight: 500; padding: 6px 0; border-bottom: 2px solid transparent; }
    .desktop-nav a:hover { color: var(--primary); border-bottom-color: var(--primary); }
    .header-actions { display: flex; align-items: center; gap: 16px; }
    .btn { display: inline-flex; align-items: center; justify-content: center; font-weight: 600; border-radius: 6px; cursor: pointer; transition: all 0.3s ease; white-space: nowrap; }
    .btn-primary-sm { background-color: var(--primary); color: #fff; padding: 8px 16px; font-size: 14px; }
    .btn-primary-sm:hover { background-color: var(--primary-hover); }
    .drawer-trigger { display: none; background: none; border: none; cursor: pointer; flex-direction: column; gap: 6px; }
    .drawer-trigger span { display: block; width: 24px; height: 2px; background-color: #fff; }

    
    .mobile-drawer-overlay { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.6); z-index: 998; opacity: 0; transition: opacity 0.3s ease; }
    .mobile-drawer-overlay.active { display: block; opacity: 1; }
    .mobile-drawer { position: fixed; top: 0; left: -280px; width: 280px; height: 100%; background-color: var(--theme-color); z-index: 999; box-shadow: 2px 0 10px rgba(0,0,0,0.5); transition: left 0.3s ease; display: flex; flex-direction: column; }
    .mobile-drawer.active { left: 0; }
    .drawer-header { display: flex; justify-content: space-between; align-items: center; padding: 20px; border-bottom: 1px solid rgba(255,255,255,0.1); }
    .drawer-close { background: none; border: none; color: #fff; font-size: 28px; cursor: pointer; }
    .drawer-content { flex: 1; overflow-y: auto; padding: 20px 0; }
    .drawer-nav { display: flex; flex-direction: column; }
    .drawer-nav a { padding: 12px 24px; color: rgba(255,255,255,0.8); font-size: 16px; border-left: 3px solid transparent; }
    .drawer-nav a:hover, .drawer-nav a.active { background: rgba(255,255,255,0.05); color: var(--primary); border-left-color: var(--primary); }

    
    .tag-header { background: radial-gradient(circle, #0f172a 0%, var(--deep-bg) 100%); color: #FFF; padding: 60px 20px; text-align: center; }
    .tag-header h1 { font-size: 32px; font-weight: 800; margin-bottom: 10px; }
    .tag-header p { font-size: 15px; color: var(--text-muted); }

    
    .tag-container { max-width: 1000px; margin: 50px auto; padding: 0 20px; }
    .tag-box { background: var(--card-bg); border-radius: 12px; border: 1px solid var(--border); padding: 40px; }
    .tag-cloud { display: flex; flex-wrap: wrap; gap: 15px; justify-content: center; }
    .tag-cloud-item { display: inline-flex; align-items: center; background-color: #F3F4F6; color: var(--text-dark); border: 1px solid var(--border); padding: 8px 18px; border-radius: 50px; font-weight: 500; font-size: 14px; }
    .tag-cloud-item:hover { background-color: var(--primary); color: #FFF; border-color: var(--primary); transform: translateY(-1px); }
    .tag-count { font-size: 11px; background-color: rgba(29, 123, 255, 0.1); color: var(--primary); border-radius: 50%; width: 22px; height: 22px; display: inline-flex; align-items: center; justify-content: center; margin-left: 8px; }
    .tag-cloud-item:hover .tag-count { background-color: #FFF; color: var(--primary); }

    
    .site-footer { background-color: var(--theme-color); color: var(--text-muted); padding: 60px 0 30px 0; border-top: 1px solid rgba(255,255,255,0.1); font-size: 14px; }
    .footer-container { max-width: 1200px; margin: 0 auto; padding: 0 20px; display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; }
    .footer-brand p { margin: 15px 0; color: var(--text-muted); line-height: 1.6; }
    .footer-links h4 { color: #FFF; margin-bottom: 20px; font-size: 16px; }
    .footer-links ul { list-style: none; }
    .footer-links li { margin-bottom: 10px; }
    .footer-links a:hover { color: #FFF; }
    .footer-bottom { max-width: 1200px; margin: 40px auto 0 auto; padding: 30px 20px 0 20px; border-top: 1px solid rgba(255,255,255,0.05); text-align: center; }
    .footer-disclaimer { font-size: 11px; line-height: 1.8; color: #4B5563; margin-top: 20px; text-align: justify; }

    @media (max-width: 768px) {
      .desktop-nav, .header-actions .btn { display: none; }
      .drawer-trigger { display: flex; }
      .footer-container { grid-template-columns: 1fr; gap: 30px; }
    }