:root{--primary:#0052cc;--secondary:#003d99;--light:#f5f7fa;--success:#28a745;--bg-color:#f8fafc;--text-color:#333;--card-bg:white;--card-shadow:#00000014;--faq-answer-bg:#fafafa;--border-color:#ddd}[data-theme=dark]{--bg-color:#1a202c;--text-color:#f7fafc;--card-bg:#2d3748;--card-shadow:#0006;--faq-answer-bg:#1a202c;--border-color:#4a5568}*{box-sizing:border-box;margin:0;padding:0;transition:background-color .3s,color .3s}body{background:var(--bg-color);color:var(--text-color);font-family:Segoe UI,Arial,sans-serif;line-height:1.6}header{color:#fff;text-align:center;background-color:#0000;background-image:linear-gradient(#0052cccc,#003d99cc),url(/assets/header-bg-BJvVB7DI.jpg);background-position:50%;background-repeat:repeat,repeat;background-size:cover;background-attachment:scroll,scroll;background-origin:padding-box,padding-box;background-clip:border-box,border-box;padding:60px 20px;position:relative}.logo{align-items:center;gap:10px;display:flex;position:absolute;top:20px;left:20px}.logo img{width:auto;height:180px}.logo span{font-size:1.5rem;font-weight:700}header h1{font-size:3rem}header p{margin-top:10px;font-size:1.1rem}.nav-buttons{margin-top:25px}.nav-buttons a{color:#fff;background:#28a745;border-radius:6px;margin:5px;padding:12px 18px;text-decoration:none;display:inline-block}.container{max-width:1200px;margin:auto;padding:40px 20px}.section{margin-bottom:60px}.section h2{color:var(--primary);margin-bottom:20px}.search-box{border:1px solid var(--border-color);background:var(--card-bg);width:100%;color:var(--text-color);border-radius:8px;padding:15px;font-size:16px}.faq-item{background:var(--card-bg);box-shadow:0 2px 5px var(--card-shadow);border-radius:8px;margin-bottom:10px;overflow:hidden}.faq-question{text-align:left;background:var(--card-bg);width:100%;color:var(--text-color);cursor:pointer;border:none;padding:16px;font-size:16px;font-weight:700}.faq-answer{background:var(--faq-answer-bg);border-top:1px solid var(--border-color);padding:15px;display:none}.process{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px;display:grid}.step{background:var(--card-bg);text-align:center;box-shadow:0 2px 5px var(--card-shadow);border-radius:8px;padding:20px}.step span{font-size:2rem}.contact-buttons a{color:#fff;border-radius:8px;margin:5px;padding:14px 20px;text-decoration:none;display:inline-block}.whatsapp{background:#25d366}.wechat{background:#07c160}.facebook{background:#1877f2}.chatbot{background:var(--card-bg);box-shadow:0 2px 5px var(--card-shadow);border-radius:10px;padding:20px}.languages button{color:#fff;cursor:pointer;background:#0052cc;border:none;border-radius:5px;margin:5px;padding:10px 15px}.theme-switcher{position:absolute;top:20px;right:20px}.theme-switcher select{color:#fff;cursor:pointer;background:#fff3;border:1px solid #fff;border-radius:4px;padding:8px}.theme-switcher select option{color:#333}.track-btn{color:#fff;cursor:pointer;background:#0052cc;border:none;border-radius:6px;padding:12px 25px}.export-notice{background:#fff3cd;border-radius:8px;padding:20px}.contact-form{background:var(--card-bg);box-shadow:0 2px 5px var(--card-shadow);text-align:left;border-radius:10px;max-width:600px;margin:0 auto;padding:30px}.contact-form h3{color:var(--primary);margin-bottom:20px}.form-group{margin-bottom:20px}.form-group label{margin-bottom:8px;font-weight:700;display:block}.form-group input,.form-group textarea{border:1px solid var(--border-color);background:var(--bg-color);width:100%;color:var(--text-color);border-radius:6px;padding:12px;font-size:16px}.form-group textarea{resize:vertical}footer{color:#fff;text-align:center;background:#003d99;padding:25px}.logo-link{color:inherit;text-decoration:none}.blog-item{background:var(--card-bg);box-shadow:0 2px 5px var(--card-shadow);border-radius:8px;margin-bottom:20px;padding:20px}.blog-item h3{color:var(--primary);margin-bottom:10px}.tracking-links{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:15px;margin-top:30px;display:grid}.tracking-card{background:var(--card-bg);text-align:center;box-shadow:0 2px 5px var(--card-shadow);color:var(--text-color);border:1px solid var(--border-color);border-radius:8px;flex-direction:column;justify-content:center;align-items:center;gap:10px;padding:20px;font-weight:700;text-decoration:none;transition:transform .2s,border-color .2s;display:flex}.tracking-result{border:1px solid var(--border-color);background:var(--card-bg);border-radius:8px;width:100%;margin-top:20px;overflow:hidden}.tracking-result iframe{border:none;width:100%;height:500px;display:block}.tracking-methods{flex-wrap:wrap;align-items:flex-start;gap:20px;display:flex}.tracking-method{background:var(--card-bg);border:1px solid var(--border-color);border-radius:8px;flex:1;min-width:280px;padding:20px}.tracking-card:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-3px)}.tracking-card span{color:#666;font-size:.9rem;font-weight:400}[data-theme=dark] .tracking-card span{color:#ccc}