:root { --primary: rgb(249,115,22); --primary-hover: #ea580c; --dark: #1f2937; --darker: #111827; --light: #f3f4f6; --white: #ffffff; --text-main: #374151; --text-muted: #6b7280; --border: #e5e7eb; --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06); --transition: all 0.3s ease; }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif; color: var(--text-main); background-color: var(--white); line-height: 1.6; }
        a { text-decoration: none; color: inherit; transition: var(--transition); }
        ul, li { list-style: none; }
        img { max-width: 100%; height: auto; display: block; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        
        
        .site-header { background: var(--darker); padding: 15px 0; position: sticky; top: 0; z-index: 100; box-shadow: var(--shadow); }
        .header-inner { display: flex; justify-content: space-between; align-items: center; }
        .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(--white); white-space: nowrap; letter-spacing: 1px; }
        .main-nav { display: flex; gap: 30px; align-items: center; }
        .main-nav a { color: var(--light); font-size: 16px; font-weight: 500; padding: 8px 0; position: relative; }
        .main-nav a:hover { color: var(--primary); }
        .main-nav a::after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px; background: var(--primary); transition: var(--transition); }
        .main-nav a:hover::after { width: 100%; }
        .menu-toggle { display: none; background: none; border: none; color: var(--white); font-size: 24px; cursor: pointer; }
        
        
        .drawer-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.6); z-index: 999; opacity: 0; visibility: hidden; transition: var(--transition); }
        .drawer-nav { position: fixed; top: 0; left: -300px; width: 280px; height: 100%; background: var(--darker); z-index: 1000; box-shadow: 2px 0 10px rgba(0,0,0,0.5); transition: transform 0.3s ease; display: flex; flex-direction: column; }
        .drawer-nav.active { transform: translateX(300px); }
        .drawer-overlay.active { opacity: 1; visibility: visible; }
        .drawer-header { padding: 20px; border-bottom: 1px solid rgba(255,255,255,0.1); display: flex; justify-content: space-between; align-items: center; }
        .drawer-close { background: none; border: none; color: var(--text-muted); font-size: 24px; cursor: pointer; }
        .drawer-menu { padding: 20px 0; overflow-y: auto; flex-grow: 1; }
        .drawer-menu a { display: block; padding: 12px 25px; color: var(--light); font-size: 16px; border-left: 3px solid transparent; }
        .drawer-menu a:hover { background: rgba(255,255,255,0.05); color: var(--primary); border-left-color: var(--primary); }

        
        .dl-hero { padding: 100px 0; background: linear-gradient(135deg, var(--darker) 0%, #374151 100%); color: var(--white); text-align: center; }
        .dl-hero-content { max-width: 800px; margin: 0 auto; }
        .dl-title { font-size: 40px; font-weight: bold; margin-bottom: 20px; }
        .dl-title span { color: var(--primary); }
        .dl-subtitle { font-size: 18px; color: #d1d5db; margin-bottom: 40px; }
        
        .dl-box { background: var(--white); border-radius: 12px; padding: 50px; box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1); color: var(--text-main); margin-top: -60px; position: relative; z-index: 10; max-width: 900px; margin-left: auto; margin-right: auto; display: flex; gap: 40px; align-items: center; }
        .dl-image { flex: 1; text-align: center; }
        .dl-image img { border-radius: 8px; box-shadow: var(--shadow); margin: 0 auto; }
        .dl-info { flex: 1; }
        .dl-info h3 { font-size: 24px; color: var(--darker); margin-bottom: 15px; }
        .dl-features { margin-bottom: 30px; }
        .dl-features li { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; font-size: 15px; }
        .dl-features li::before { content: '✓'; display: inline-flex; justify-content: center; align-items: center; width: 24px; height: 24px; background: rgba(249,115,22,0.1); color: var(--primary); border-radius: 50%; font-weight: bold; font-size: 12px; }
        
        .btn-download { display: inline-flex; align-items: center; gap: 10px; background: var(--primary); color: var(--white); padding: 16px 40px; border-radius: 8px; font-size: 18px; font-weight: bold; box-shadow: 0 4px 14px 0 rgba(249,115,22,0.39); transition: transform 0.2s; }
        .btn-download:hover { transform: translateY(-3px); background: var(--primary-hover); color: var(--white); }

        .steps-section { padding: 100px 0 60px; background: var(--light); }
        .steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; margin-top: 40px; }
        .step-card { text-align: center; padding: 30px; background: var(--white); border-radius: 8px; box-shadow: var(--shadow); position: relative; }
        .step-num { width: 50px; height: 50px; background: var(--darker); color: var(--white); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 24px; font-weight: bold; margin: 0 auto 20px; border: 3px solid var(--primary); }
        .step-card h4 { font-size: 20px; color: var(--darker); margin-bottom: 15px; }
        .step-card p { font-size: 15px; color: var(--text-muted); }

        
        .site-footer { background: var(--darker); color: #9ca3af; padding: 60px 0 20px; }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
        .footer-logo { margin-bottom: 20px; }
        .site-footer .logo span { color: var(--white); }
        .footer-about { font-size: 14px; line-height: 1.8; margin-bottom: 20px; }
        .footer-widget h4 { color: var(--white); font-size: 18px; font-weight: bold; margin-bottom: 20px; position: relative; padding-bottom: 10px; }
        .footer-widget h4::after { content: ''; position: absolute; left: 0; bottom: 0; width: 30px; height: 2px; background: var(--primary); }
        .footer-links li { margin-bottom: 12px; }
        .footer-links a { font-size: 14px; display: inline-block; }
        .footer-links a:hover { color: var(--primary); transform: translateX(5px); }
        .footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding-top: 20px; display: flex; justify-content: space-between; align-items: center; font-size: 14px; }
        .footer-bottom-links { display: flex; gap: 20px; }

        @media (max-width: 768px) {
            .main-nav { display: none; }
            .menu-toggle { display: block; }
            .dl-box { flex-direction: column; padding: 30px; margin-top: -30px; }
            .steps-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; }
            .footer-bottom { flex-direction: column; gap: 15px; text-align: center; }
        }