:root{--primary-color: #4f46e5;--primary-hover: #4338ca;--success-color: #10b981;--error-color: #ef4444;--warning-color: #f59e0b;--bg-color: #f9fafb;--card-bg: #ffffff;--text-primary: #111827;--text-secondary: #6b7280;--border-color: #e5e7eb;--shadow: 0 1px 3px 0 rgba(0, 0, 0, .1);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:var(--bg-color);color:var(--text-primary);line-height:1.6}.app{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}.redeem-page{width:100%;max-width:600px;margin:0 auto}.page-container{background:var(--card-bg);border-radius:16px;box-shadow:var(--shadow-lg);overflow:hidden}.page-header{text-align:center;padding:40px 30px 30px;background:linear-gradient(135deg,var(--primary-color) 0%,var(--primary-hover) 100%);color:#fff}.page-header h1{font-size:2rem;font-weight:700;margin-bottom:10px}.page-header .subtitle{font-size:1rem;opacity:.9}.page-content{padding:40px 30px}.page-footer{padding:0 30px 40px}.code-input-container{width:100%}.code-form{margin-bottom:30px}.input-group{display:flex;gap:10px;margin-bottom:10px}.code-input{flex:1;padding:12px 16px;border:2px solid var(--border-color);border-radius:8px;font-size:1rem;transition:all .2s}.code-input:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #4f46e51a}.code-input.error{border-color:var(--error-color)}.code-input:disabled{background:#f3f4f6;cursor:not-allowed}.submit-button{padding:12px 32px;background:var(--primary-color);color:#fff;border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s;white-space:nowrap}.submit-button:hover:not(:disabled){background:var(--primary-hover);transform:translateY(-1px);box-shadow:var(--shadow)}.submit-button:disabled{background:#d1d5db;cursor:not-allowed;transform:none}.error-message{padding:12px 16px;background:#fef2f2;border:1px solid #fecaca;border-radius:8px;color:var(--error-color);font-size:.9rem}.code-hint{padding:16px;background:#f0f9ff;border-radius:8px;font-size:.9rem;color:var(--text-secondary)}.code-hint p{margin:5px 0}.account-card{width:100%}.card-header{text-align:center;margin-bottom:30px}.card-header h2{font-size:1.8rem;color:var(--success-color);margin-bottom:10px}.success-message{color:var(--text-secondary);font-size:1rem}.card-content{background:#f9fafb;border-radius:12px;padding:20px;margin-bottom:20px}.info-row{margin-bottom:20px}.info-row:last-child{margin-bottom:0}.info-row label{display:block;font-size:.875rem;font-weight:600;color:var(--text-secondary);margin-bottom:8px}.value-container{display:flex;align-items:center;gap:10px}.value{flex:1;padding:10px 12px;background:#fff;border:1px solid var(--border-color);border-radius:6px;font-size:.9rem;word-break:break-all}.value.token{font-family:Courier New,monospace;font-size:.85rem}.value.link{color:var(--primary-color);text-decoration:none}.value.link:hover{text-decoration:underline}.copy-button{padding:8px 12px;background:var(--primary-color);color:#fff;border:none;border-radius:6px;cursor:pointer;transition:all .2s;font-size:1rem}.copy-button:hover{background:var(--primary-hover)}.card-footer{padding:16px;background:#fffbeb;border-radius:8px;margin-bottom:20px}.expire-notice{color:var(--warning-color);font-size:.9rem;text-align:center}.card-actions{text-align:center}.action-button{padding:12px 32px;background:#fff;color:var(--primary-color);border:2px solid var(--primary-color);border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s}.action-button:hover{background:var(--primary-color);color:#fff}.security-notice{padding:20px;background:#f9fafb;border-radius:8px;font-size:.9rem}.security-notice p{font-weight:600;margin-bottom:10px;color:var(--text-primary)}.security-notice ul{list-style:none;padding-left:0}.security-notice li{color:var(--text-secondary);position:relative;padding:5px 0 5px 20px}.security-notice li:before{content:"•";position:absolute;left:5px;color:var(--primary-color)}.qq-section{margin-top:30px}.qq-group-card-wrapper{width:100%}.qq-card-title{font-size:1.1rem;font-weight:600;color:var(--text-primary);margin-bottom:15px;text-align:center}.qq-card{display:flex;align-items:center;gap:20px;padding:20px;background:#fff;border:2px solid var(--border-color);border-radius:12px;cursor:pointer;transition:all .3s ease;box-shadow:var(--shadow)}.qq-card:hover{border-color:var(--primary-color);transform:translateY(-2px);box-shadow:0 4px 12px #00000026}.qq-icon-wrapper{flex-shrink:0;width:60px;height:60px;border-radius:12px;overflow:hidden;background:#f0f9ff;display:flex;align-items:center;justify-content:center}.qq-icon{width:100%;height:100%;object-fit:cover}.qq-info{flex:1}.qq-label{font-size:.875rem;color:var(--text-secondary);margin-bottom:4px}.qq-number{font-size:1.5rem;font-weight:700;color:var(--primary-color);margin-bottom:4px;font-family:Courier New,monospace}.qq-hint{font-size:.875rem;color:var(--text-secondary)}.qq-note{margin-top:15px;text-align:center;font-size:.9rem;color:var(--text-secondary)}@media (max-width: 640px){.page-header h1{font-size:1.5rem}.page-header,.page-content,.page-footer{padding-left:20px;padding-right:20px}.input-group{flex-direction:column}.submit-button{width:100%}.value-container{flex-direction:column;align-items:stretch}.copy-button{width:100%}}