:root {
            --primary-color: rgb(187,134,252);
            --primary-color-light: rgba(187,134,252, 0.1);
            --primary-color-dark: rgb(158, 99, 233);
            --bg-color: #121212;
            --surface-color: #1e1e1e;
            --text-color: #e0e0e0;
            --text-secondary-color: #a0a0a0;
            --border-color: rgba(255, 255, 255, 0.1);
            --header-height: 70px;
        }
        *, *::before, *::after { 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(--bg-color); color: var(--text-color); line-height: 1.7; font-size: 16px; -webkit-font-smoothing: antialiased; }
        a { color: var(--primary-color); text-decoration: none; transition: color 0.3s ease; }
        a:hover { color: var(--primary-color-dark); }
        img { max-width: 100%; height: auto; display: block; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        .header { position: relative; top: 0; left: 0; width: 100%; z-index: 1000; padding: 0 20px; height: var(--header-height); background-color: var(--surface-color); border-bottom: 1px solid var(--border-color); }
        .header-inner { display: flex; justify-content: space-between; align-items: center; height: 100%; }
        .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: 700; color: #fff; white-space: nowrap; }
        .main-nav { display: none; }
        .nav-toggle { display: block; width: 24px; height: 24px; background: none; border: none; cursor: pointer; z-index: 1001; position: relative; }
        .nav-toggle .icon-bar { display: block; width: 100%; height: 2px; background-color: #fff; border-radius: 1px; transition: all 0.3s ease; }
        .nav-toggle .icon-bar:nth-child(2) { margin: 6px 0; }
        .mobile-nav-open .nav-toggle .icon-bar:nth-child(1) { transform: translateY(8px) rotate(45deg); }
        .mobile-nav-open .nav-toggle .icon-bar:nth-child(2) { opacity: 0; }
        .mobile-nav-open .nav-toggle .icon-bar:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }
        .drawer-nav { position: fixed; top: 0; left: -280px; width: 280px; height: 100%; background-color: var(--surface-color); z-index: 999; transition: left 0.3s ease; padding: 20px; display: flex; flex-direction: column; }
        .drawer-nav .logo { margin-bottom: 30px; }
        .drawer-nav .logo span { color: var(--text-color); }
        .drawer-nav-links { list-style: none; flex-grow: 1; }
        .drawer-nav-links a { display: block; padding: 12px 0; font-size: 16px; color: var(--text-color); font-weight: 500; border-bottom: 1px solid var(--border-color); }
        .drawer-nav-links a:hover { color: var(--primary-color); }
        .nav-mask { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0,0,0,0.5); z-index: 998; opacity: 0; visibility: hidden; transition: opacity 0.3s ease, visibility 0.3s ease; }
        .mobile-nav-open .drawer-nav { left: 0; }
        .mobile-nav-open .nav-mask { opacity: 1; visibility: visible; }
        .page-header { padding: 60px 0; text-align: center; background-color: var(--surface-color); }
        .page-header h1 { font-size: 2.5rem; font-weight: 700; margin-bottom: 10px; }
        .page-header p { font-size: 1.1rem; color: var(--text-secondary-color); max-width: 700px; margin: 0 auto; }
        .section { padding: 80px 0; }
        .about-content { max-width: 800px; margin: 0 auto; }
        .about-content h2 { font-size: 1.8rem; margin-bottom: 20px; padding-bottom: 10px; border-bottom: 2px solid var(--primary-color); display: inline-block; }
        .about-content p { margin-bottom: 20px; color: var(--text-secondary-color); }
        .features-section { background-color: var(--surface-color); }
        .section-title { text-align: center; margin-bottom: 60px; }
        .section-title h2 { font-size: 2.2rem; font-weight: 700; margin-bottom: 10px; }
        .section-title p { font-size: 1.1rem; color: var(--text-secondary-color); max-width: 600px; margin: 0 auto; }
        .features-grid { display: grid; grid-template-columns: 1fr; gap: 30px; }
        .feature-card { background-color: var(--bg-color); padding: 30px; border-radius: 12px; text-align: center; border: 1px solid var(--border-color); }
        .feature-card svg { width: 48px; height: 48px; color: var(--primary-color); margin-bottom: 20px; }
        .feature-card h3 { font-size: 1.2rem; font-weight: 600; margin-bottom: 10px; }
        .feature-card p { color: var(--text-secondary-color); font-size: 0.95rem; }
        .contact-section { text-align: center; }
        .contact-info p { font-size: 1.1rem; margin-bottom: 10px; }
        .contact-info a { font-weight: 600; }
        .footer { background-color: var(--surface-color); padding: 60px 0 30px; }
        .footer-grid { display: grid; grid-template-columns: 1fr; gap: 40px; text-align: center; }
        .footer-brand p { color: var(--text-secondary-color); font-size: 0.9rem; margin-top: 15px; }
        .footer-links h4 { font-size: 1.1rem; font-weight: 600; margin-bottom: 15px; }
        .footer-links ul { list-style: none; }
        .footer-links ul li { margin-bottom: 10px; }
        .footer-links ul a { color: var(--text-secondary-color); }
        .footer-links ul a:hover { color: #fff; }
        .footer-bottom { border-top: 1px solid var(--border-color); margin-top: 40px; padding-top: 30px; text-align: center; font-size: 0.9rem; color: var(--text-secondary-color); }
        @media (min-width: 768px) {
            .header { position: relative; }
            .main-nav { display: flex; align-items: center; gap: 30px; }
            .main-nav a { color: #fff; font-weight: 500; }
            .main-nav a:hover { color: var(--primary-color); }
            .nav-toggle { display: none; }
            .features-grid { grid-template-columns: repeat(3, 1fr); }
            .footer-grid { grid-template-columns: 2fr 1fr 1fr; text-align: left; }
        }