:root {
      --primary-color: rgb(107,114,128);
      --primary-hover: #4b5563;
      --dark-color: #1f2937;
      --light-bg: #f9fafb;
      --card-bg: #ffffff;
      --text-main: #374151;
      --text-muted: #9ca3af;
      --border-color: #e5e7eb;
      --accent-color: #d97706;
      --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    }
    * { margin: 0; padding: 0; box-sizing: border-box; }
    body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; background-color: var(--light-bg); color: var(--text-main); line-height: 1.6; }
    a { text-decoration: none; color: inherit; transition: all 0.3s ease; }
    ul { list-style: none; }
    
    .container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
    
    
    .header { background: var(--card-bg); border-bottom: 1px solid var(--border-color); position: sticky; top: 0; z-index: 100; box-shadow: var(--shadow-sm); }
    .header-container { display: flex; align-items: center; justify-content: space-between; height: 72px; }
    .logo { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
    .logo img { display: block; height: 40px; width: auto; max-width: 160px; object-fit: contain; flex-shrink: 0; }
    .logo span { display: inline-block; font-size: 20px; font-weight: 800; line-height: 1; color: var(--dark-color); white-space: nowrap; }
    
    .nav-desktop { display: flex; gap: 24px; align-items: center; }
    .nav-desktop a { font-size: 15px; font-weight: 500; color: var(--text-main); padding: 8px 12px; border-radius: 6px; }
    .nav-desktop a:hover { color: var(--primary-color); background: #f3f4f6; }
    
    .header-actions { display: flex; align-items: center; gap: 16px; }
    .btn-primary-sm { background-color: var(--primary-color); color: #fff; padding: 8px 16px; border-radius: 6px; font-size: 14px; font-weight: 600; text-align: center; border: none; cursor: pointer; transition: background 0.3s; }
    .btn-primary-sm:hover { background-color: var(--primary-hover); color: #fff; }
    .menu-toggle { display: none; background: none; border: none; cursor: pointer; flex-direction: column; gap: 6px; padding: 4px; }
    .menu-toggle span { display: block; width: 24px; height: 2px; background: var(--dark-color); border-radius: 2px; transition: 0.3s; }
    
    
    .drawer-backdrop { position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; background: rgba(0,0,0,0.5); z-index: 1010; opacity: 0; pointer-events: none; transition: opacity 0.3s ease; }
    .drawer-backdrop.active { opacity: 1; pointer-events: auto; }
    .drawer { position: fixed; top: 0; left: -280px; width: 280px; height: 100vh; background: var(--card-bg); z-index: 1020; transition: transform 0.3s ease; display: flex; flex-direction: column; box-shadow: var(--shadow-lg); }
    .drawer.active { transform: translateX(280px); }
    .drawer-header { display: flex; align-items: center; justify-content: space-between; padding: 20px; border-bottom: 1px solid var(--border-color); }
    .drawer-close { background: none; border: none; font-size: 28px; cursor: pointer; color: var(--text-muted); }
    .drawer-content { padding: 20px; flex-grow: 1; overflow-y: auto; }
    .nav-mobile { display: flex; flex-direction: column; gap: 16px; }
    .nav-mobile a { font-size: 16px; font-weight: 500; color: var(--text-main); padding: 10px; border-radius: 6px; }
    .nav-mobile a:hover { background: #f3f4f6; color: var(--primary-color); }
    .drawer-footer { padding: 20px; border-top: 1px solid var(--border-color); }
    .btn-primary { display: block; width: 100%; background: var(--primary-color); color: #fff; padding: 12px; text-align: center; border-radius: 8px; font-weight: 600; }
    .btn-primary:hover { background: var(--primary-hover); }

    
    .about-hero { background: linear-gradient(135deg, #1f2937 0%, #111827 100%); color: #fff; padding: 80px 0; text-align: center; }
    .about-hero h1 { font-size: 36px; font-weight: 800; margin-bottom: 20px; }
    .about-hero p { font-size: 18px; color: var(--text-muted); max-width: 800px; margin: 0 auto; line-height: 1.8; }
    
    .about-content { padding: 80px 0; }
    .about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; margin-bottom: 80px; }
    .about-text h2 { font-size: 28px; font-weight: 800; color: var(--dark-color); margin-bottom: 24px; position: relative; }
    .about-text h2::after { content: ''; display: block; width: 60px; height: 4px; background: var(--primary-color); margin-top: 10px; border-radius: 2px; }
    .about-text p { font-size: 16px; color: var(--text-main); margin-bottom: 20px; line-height: 1.8; }
    .about-visual { background: var(--card-bg); border: 1px solid var(--border-color); border-radius: 16px; padding: 40px; box-shadow: var(--shadow-md); }
    
    
    .values-section { background: #f3f4f6; padding: 80px 0; }
    .values-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
    .value-card { background: var(--card-bg); padding: 32px; border-radius: 12px; border: 1px solid var(--border-color); text-align: center; }
    .value-icon { font-size: 40px; margin-bottom: 20px; }
    .value-card h3 { font-size: 20px; font-weight: 700; color: var(--dark-color); margin-bottom: 12px; }
    .value-card p { font-size: 14px; color: var(--text-muted); line-height: 1.7; }
    
    
    .footer { background: #111827; color: #9ca3af; padding: 60px 0 20px; font-size: 14px; border-top: 4px solid var(--primary-color); }
    .footer-container { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 40px; margin-bottom: 40px; }
    .footer-brand { display: flex; flex-direction: column; gap: 16px; }
    .footer-brand .logo span { color: #ffffff; }
    .footer-desc { line-height: 1.7; color: #9ca3af; }
    .footer-links h4, .footer-resources h4, .footer-contact h4 { color: #ffffff; font-size: 16px; font-weight: 700; margin-bottom: 20px; }
    .footer-links ul, .footer-resources ul { display: flex; flex-direction: column; gap: 10px; }
    .footer-links a:hover, .footer-resources a:hover { color: #ffffff; }
    .footer-bottom { border-top: 1px solid #1f2937; padding-top: 20px; text-align: center; display: flex; flex-direction: column; gap: 12px; }
    .risk-warning { font-size: 11px; color: #6b7280; max-width: 900px; margin: 0 auto; line-height: 1.5; }
    
    @media (max-width: 1024px) {
      .about-grid { grid-template-columns: 1fr; }
      .values-grid { grid-template-columns: 1fr; }
      .footer-container { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      .nav-desktop { display: none; }
      .menu-toggle { display: flex; }
      .footer-container { grid-template-columns: 1fr; }
    }