:root{--primary: #07c160;--primary-hover: #06ad56;--bg: #f5f5f5;--card-bg: #ffffff;--text: #333333;--text-secondary: #999999;--radius: 12px;--shadow: 0 2px 8px rgba(0, 0, 0, .08)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Helvetica Neue,sans-serif;background:var(--bg);color:var(--text);min-height:100vh;display:flex;align-items:center;justify-content:center}#app{width:100%;max-width:420px;padding:24px 16px}.card{background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);padding:32px 24px;text-align:center}.card-title{font-size:20px;font-weight:600;margin-bottom:8px}.card-desc{font-size:14px;color:var(--text-secondary);margin-bottom:24px;line-height:1.5}.qr-image{width:240px;height:240px;margin:0 auto 24px;border-radius:8px;display:block}.status-icon{width:64px;height:64px;border-radius:50%;background:var(--primary);color:#fff;font-size:32px;line-height:64px;margin:0 auto 16px}.btn-primary{display:inline-block;padding:12px 32px;background:var(--primary);color:#fff;border:none;border-radius:8px;font-size:16px;font-weight:500;cursor:pointer;transition:background .2s}.btn-primary:active{background:var(--primary-hover)}.loading-spinner{width:40px;height:40px;border:3px solid var(--bg);border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite;margin:0 auto 16px}@keyframes spin{to{transform:rotate(360deg)}}.error-icon{width:64px;height:64px;border-radius:50%;background:#fa5151;color:#fff;font-size:32px;line-height:64px;margin:0 auto 16px}