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0-7.78z'%3E%3C/path%3E%3Cline x1='8' y1='16' x2='16' y2='8'%3E%3C/line%3E%3Cline x1='16' y1='16' x2='8' y2='8'%3E%3C/line%3E%3C/svg%3E")}.icon-button:hover .icon.heart-cancel{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23e02d1d' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20.84 4.61a5.5 5.5 0 0 0-7.78 0L12 5.67l-1.06-1.06a5.5 5.5 0 0 0-7.78 7.78l1.06 1.06L12 21.23l7.78-7.78 1.06-1.06a5.5 5.5 0 0 0 0-7.78z'%3E%3C/path%3E%3Cline x1='8' y1='16' x2='16' y2='8'%3E%3C/line%3E%3Cline x1='16' y1='16' x2='8' y2='8'%3E%3C/line%3E%3C/svg%3E")}@media (max-width: 768px){.library-header{flex-direction:column;gap:15px;text-align:center;padding:1rem}.library-header h2{font-size:1.5rem}.header-actions{flex-wrap:wrap;justify-content:center;gap:6px;width:100%}.header-actions .btn{flex:1;min-width:120px;max-width:140px;margin:2px}.songs-table{font-size:14px}.songs-table th,.songs-table td{padding:8px 10px}.icon-button{width:30px;height:30px;margin-right:3px}.icon{width:18px;height:18px}.library-content{padding:3px}}@media (max-width: 480px){.mobile-only{display:inline-block;width:100%;margin:0;padding:10px 15px;font-size:14px;justify-content:center}.library-header{padding:.8rem;gap:10px}.library-header h2{font-size:1.3rem}.header-actions{gap:4px}.header-actions .btn{min-width:100px;max-width:110px;font-size:.8rem;padding:6px 8px}.actions-section button{width:auto;padding:5px 10px;font-size:11px;border:none;border-radius:var(--border-radius-base);cursor:pointer;font-weight:var(--font-weight-medium);transition:all .3s ease;height:28px;min-width:80px;background-color:var(--success-color);color:#fff;box-shadow:0 2px 5px #1cc88a4d;white-space:nowrap}.actions-section button:hover{background-color:var(--success-dark);transform:translateY(-2px);box-shadow:0 4px 8px #1cc88a66}.library-content{padding:3px}.library-content h2{font-size:1.2rem;padding-bottom:10px}.songs-table th,.songs-table td{padding:6px 8px;font-size:12px}.icon-button{width:26px;height:26px;margin-right:2px}.icon{width:16px;height:16px}}.song-actions{display:flex;align-items:center;justify-content:flex-start;gap:5px}.library-song-list-container{width:100%;border:1px solid #e0e0e0;border-radius:8px;overflow:hidden;background-color:#fff;box-shadow:0 2px 4px #0000001a}.library-song-list-header{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;background-color:#f8f9fa;border-bottom:1px solid #e0e0e0;font-weight:600;color:#333;font-size:14px}.header-song-name{flex:2;min-width:0}.header-upload-time{flex:1;text-align:center;min-width:100px}.header-actions{flex:1;text-align:center;min-width:120px}.library-song-list-scrollable{overflow-y:auto;overflow-x:hidden;scroll-behavior:smooth}.library-song-list-scrollable::-webkit-scrollbar{width:6px}.library-song-list-scrollable::-webkit-scrollbar-track{background:#f1f1f1}.library-song-list-scrollable::-webkit-scrollbar-thumb{background:#c1c1c1;border-radius:3px}.library-song-list-scrollable::-webkit-scrollbar-thumb:hover{background:#a8a8a8}.library-song-item{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;border-bottom:1px solid #f0f0f0;transition:background-color .2s ease}.library-song-item:hover{background-color:#f8f9fa}.library-song-item:last-child{border-bottom:none}.library-song-item .song-info{flex:2;display:flex;flex-direction:column;min-width:0}.library-song-item .song-name{font-weight:500;font-size:16px;color:#333;overflow:hidden;text-align:left;text-overflow:ellipsis;white-space:wrap;margin-bottom:4px}.song-meta{display:flex;gap:16px}.library-song-item .uploader-info{font-size:13px;color:#999}.library-song-item .upload-date{font-size:12px;color:#999}.library-song-item .upload-time{flex:1;text-align:center;font-size:14px;color:#666;min-width:100px}.library-song-item .song-actions{display:flex;gap:8px}.library-loading-indicator{text-align:center;padding:16px;color:#666;font-size:14px;display:flex;justify-content:center;align-items:center;gap:8px}.library-spinner{width:16px;height:16px;border:2px solid #f3f3f3;border-top:2px solid #666;border-radius:50%;animation:spin 1s linear infinite}.library-no-more{text-align:center;padding:16px;color:#999;font-size:14px;font-style:italic}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@media (max-width: 768px){.library-song-list-header{padding:10px 12px;font-size:12px}.library-song-item{padding:10px 12px;display:flex;justify-content:space-between;align-items:center}.library-song-item .song-info{flex:1;min-width:0}.library-song-item .upload-time{display:none}.library-song-item .song-actions{flex:none;justify-content:flex-end;min-width:auto}.header-song-name,.header-upload-time,.header-actions{min-width:auto}}.song-upload-container{max-width:600px;margin:20px auto;padding:30px;background:white;border-radius:var(--border-radius-lg);box-shadow:var(--shadow-md)}.song-upload-container h2{text-align:center;color:var(--gray-900);margin-bottom:25px;font-size:1.5rem;font-weight:var(--font-weight-semibold);border-bottom:2px solid var(--gray-200);padding-bottom:15px}.song-upload-form{display:flex;flex-direction:column}.form-group{margin-bottom:var(--spacing-5)}.form-group label{display:block;margin-bottom:var(--spacing-2);font-weight:var(--font-weight-medium);color:var(--gray-700);font-size:14px}.form-group input[type=text]{width:100%;padding:var(--spacing-3) var(--spacing-4);border:1px solid var(--gray-400);border-radius:var(--border-radius-base);font-size:16px;box-sizing:border-box;transition:var(--transition-base)}.form-group input[type=text]:focus{outline:none;border-color:var(--info-color);box-shadow:0 0 0 3px #4e73df1a}.form-group input[type=file]{width:100%;padding:var(--spacing-3) var(--spacing-4);border:1px solid var(--gray-400);border-radius:var(--border-radius-base);font-size:16px;box-sizing:border-box;background-color:#fff}.form-group input[type=file]:focus{outline:none;border-color:var(--info-color);box-shadow:0 0 0 3px #4e73df1a}.file-info{margin-top:var(--spacing-2);font-size:14px;color:var(--gray-600);display:flex;align-items:center;gap:5px}.error-message{color:var(--danger-dark);background-color:var(--danger-color);padding:var(--spacing-3) var(--spacing-4);border-radius:var(--border-radius-base);margin-bottom:var(--spacing-5);border-left:4px solid var(--danger-color);font-size:14px}.success-message{color:var(--success-dark);background-color:var(--success-color);padding:var(--spacing-3) var(--spacing-4);border-radius:var(--border-radius-base);margin-bottom:var(--spacing-5);border-left:4px solid var(--success-color);font-size:14px}.upload-button{background:linear-gradient(135deg,var(--secondary-color) 0%,var(--accent-color) 100%);color:#fff;padding:var(--spacing-3) var(--spacing-5);border:none;border-radius:var(--border-radius-base);font-size:16px;font-weight:var(--font-weight-medium);cursor:pointer;transition:var(--transition-base);box-shadow:0 2px 5px #667eea4d;margin-top:var(--spacing-3)}.upload-button:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 4px 8px #667eea66}.upload-button:disabled{background:var(--gray-600);cursor:not-allowed;transform:none;box-shadow:none}@media (max-width: 768px){.song-upload-container{padding:var(--spacing-5);margin:var(--spacing-3)}.form-group input[type=text],.form-group input[type=file]{padding:var(--spacing-3) var(--spacing-3);font-size:14px}.upload-button{padding:var(--spacing-3) var(--spacing-4);font-size:14px}}.upload-page-container{max-width:800px;margin:0 auto;padding:10px;min-height:calc(95vh - 70px);background-color:var(--light)}.upload-page-header{background:linear-gradient(135deg,var(--secondary-color) 0%,var(--accent-color) 100%);color:#fff;padding:1rem 2rem;display:flex;justify-content:space-between;align-items:center;margin-bottom:30px;border-radius:var(--border-radius-lg);box-shadow:0 4px 12px #0000001a;gap:20px;min-height:60px}.upload-page-header h1{margin:0;font-size:1.8rem;font-weight:var(--font-weight-semibold);flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.upload-page-header .btn{flex-shrink:0;min-width:120px;max-width:140px}.upload-content{background:white;border-radius:var(--border-radius-lg);box-shadow:0 2px 10px #0000001a;padding:30px;margin-bottom:30px}@media (max-width: 768px){.upload-page-container{padding:15px}.upload-page-header{flex-direction:row;justify-content:space-between;align-items:center;text-align:left;padding:1rem;min-height:auto}.upload-page-header h1{font-size:1.5rem;flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.upload-content{padding:20px}.upload-page-header .btn{min-width:100px;max-width:120px;margin:0;font-size:.9rem;padding:8px 12px}}@media (max-width: 480px){.upload-page-container{padding:10px}.upload-page-header{flex-direction:column;text-align:center;padding:.8rem;gap:10px}.upload-page-header h1{font-size:1.3rem;flex:none;white-space:normal;margin-bottom:10px}.upload-content{padding:15px}.upload-page-header .btn{min-width:90px;max-width:100px;font-size:.8rem;padding:6px 8px;align-self:center}}.login-container{display:flex;justify-content:center;align-items:center;min-height:calc(100vh - 65px);background-color:var(--gray-100)}.login-form{background:white;padding:2rem;border-radius:var(--border-radius-lg);box-shadow:var(--shadow-md);width:100%;max-width:400px;margin:0 auto}.login-form h2{text-align:center;margin-bottom:1.5rem;color:var(--gray-900)}button{width:100%;padding:var(--spacing-3);background-color:var(--gray-900);color:#fff;border:none;border-radius:var(--border-radius-sm);font-size:var(--font-size-base);cursor:pointer;transition:var(--transition-base)}button:hover{background-color:var(--gray-700)}.error-message{color:var(--danger-color);background-color:#ffe6e6;padding:var(--spacing-3);border-radius:var(--border-radius-sm);margin-bottom:var(--spacing-4);text-align:center;opacity:0;transform:translateY(-10px);transition:opacity .3s ease-out,transform .3s ease-out}.error-message.show{opacity:1;transform:translateY(0)}.error-message.fade-out{opacity:0;transform:translateY(-10px);transition:opacity .5s ease-in,transform .5s ease-in}.register-link{text-align:center;margin-top:var(--spacing-4);color:var(--gray-600)}.register-link a{color:var(--primary-color);text-decoration:none}.register-link a:hover{text-decoration:underline}.register-container{display:flex;justify-content:center;align-items:center;min-height:calc(100vh - 60px);background-color:var(--gray-100)}.register-form{background:white;padding:2rem;border-radius:var(--border-radius-lg);box-shadow:var(--shadow-md);width:100%;max-width:400px}.register-form h2{text-align:center;margin-bottom:1.5rem;color:var(--gray-900)}.form-group label{display:block;margin-bottom:var(--spacing-2);color:var(--gray-600)}.form-group input{width:100%;padding:var(--spacing-3);border:1px solid var(--gray-400);border-radius:var(--border-radius-sm);font-size:var(--font-size-base);box-sizing:border-box;transition:var(--transition-base)}.form-group input:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #646cff1a}button{width:100%;padding:var(--spacing-3);background-color:var(--primary-color);color:#fff;border:none;border-radius:var(--border-radius-sm);font-size:var(--font-size-base);cursor:pointer;transition:var(--transition-base);margin-top:var(--spacing-4)}button:hover{background-color:var(--primary-dark)}button:disabled{background-color:var(--gray-400);cursor:not-allowed}.error-message{color:var(--danger-color);background-color:#ffe6e6;padding:var(--spacing-3);border-radius:var(--border-radius-sm);margin-bottom:var(--spacing-4);text-align:center}.success-message{color:var(--success-color);background-color:#e6ffe6;padding:var(--spacing-3);border-radius:var(--border-radius-sm);margin-bottom:var(--spacing-4);text-align:center}.login-link{text-align:center;margin-top:var(--spacing-4);color:var(--gray-600)}.login-link a{color:var(--primary-color);text-decoration:none}.login-link a:hover{text-decoration:underline}.admin-container{max-width:1200px;margin:0 auto;padding:20px;min-height:calc(100vh - 60px);background-color:var(--light)}.admin-header{background:linear-gradient(135deg,var(--secondary-color) 0%,var(--accent-color) 100%);color:#fff;padding:1rem 2rem;display:flex;justify-content:space-between;align-items:center;margin-bottom:30px;border-radius:var(--border-radius-lg);box-shadow:0 4px 12px #0000001a;gap:20px;min-height:60px}.admin-header h1{margin:0;font-size:1.8rem;font-weight:var(--font-weight-semibold);flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.admin-header .btn{flex-shrink:0;min-width:120px;max-width:140px}.admin-content{background:white;border-radius:var(--border-radius-lg);box-shadow:0 2px 10px #0000001a;padding:30px;margin-bottom:30px}.admin-content h2{margin-top:0;color:var(--gray-900);border-bottom:2px solid var(--gray-200);padding-bottom:15px;font-size:1.5rem;font-weight:var(--font-weight-semibold)}.users-table{width:100%;border-collapse:collapse;margin-top:20px}.users-table th,.users-table td{padding:12px 15px;text-align:left;border-bottom:1px solid #eee}.users-table th{background-color:var(--light);font-weight:var(--font-weight-semibold);color:var(--gray-900)}.users-table tbody tr:hover{background-color:var(--light)}.users-table input,.users-table select{width:100%;padding:var(--spacing-2);border:1px solid var(--gray-400);border-radius:var(--border-radius-sm);box-sizing:border-box}.admin-level{color:var(--danger-color);font-weight:700}.user-level{color:var(--success-color)}.password-form{display:flex;gap:var(--spacing-2);margin-top:var(--spacing-2);flex-wrap:wrap;align-items:center}.password-form input{flex:1;min-width:150px;padding:var(--spacing-2);border:1px solid var(--gray-400);border-radius:var(--border-radius-sm);font-size:var(--font-size-base);transition:var(--transition-base)}.password-form input:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px 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10px}.icon-button{width:30px;height:30px;margin-right:3px}.icon{width:18px;height:18px}.password-form{flex-direction:column;align-items:stretch}.password-form input{min-width:auto}}@media (max-width: 480px){.admin-container{padding:10px}.admin-header{padding:.8rem;gap:10px;flex-direction:column;text-align:center}.admin-header h1{font-size:1.3rem;flex:none;white-space:normal;margin-bottom:10px}.admin-header .btn{min-width:90px;max-width:100px;font-size:.8rem;padding:6px 8px;align-self:center}.admin-content{padding:15px}.users-table{display:block;overflow-x:auto;-webkit-overflow-scrolling:touch}.users-table thead{display:none}.users-table tbody{display:block}.users-table tr{display:block;margin-bottom:15px;border:1px solid var(--gray-300);border-radius:var(--border-radius-md);padding:15px;background:white;box-shadow:0 2px 8px #0000001a}.users-table td{display:flex;justify-content:space-between;align-items:center;padding:8px 0;border:none;border-bottom:1px solid var(--gray-200);font-size:14px}.users-table td:last-child{border-bottom:none;padding-bottom:0}.users-table td:before{content:attr(data-label);font-weight:var(--font-weight-semibold);color:var(--gray-700);min-width:80px;text-align:left}.users-table td:first-child:before{content:"用户名:"}.users-table td:nth-child(2):before{content:"手机号:"}.users-table td:nth-child(3):before{content:"等级:"}.users-table td:nth-child(4):before{content:"操作:"}.users-table input,.users-table select{font-size:14px;padding:6px 8px}.adm-checkbox{margin-top:8px}.adm-checkbox label{font-size:12px;display:flex;align-items:center;gap:6px}.password-form{flex-direction:column;gap:8px;margin-top:10px}.password-form input{font-size:14px;padding:6px 8px}.icon-button{width:28px;height:28px;margin-right:4px}.icon{width:16px;height:16px}}@media (max-width: 768px) and (min-width: 481px){.users-table{font-size:13px}.users-table th,.users-table td{padding:8px 10px}.users-table th:nth-child(1),.users-table 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auto;padding:var(--spacing-1);text-align:center}.App{display:flex;flex-direction:column;min-height:100vh}.logo{height:6em;padding:var(--spacing-4);will-change:filter;transition:var(--transition-base)}.logo:hover{filter:drop-shadow(0 0 2em #646cffaa)}.logo.react:hover{filter:drop-shadow(0 0 2em #61dafba)}@keyframes logo-spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@media (prefers-reduced-motion: no-preference){a:nth-of-type(2) .logo{animation:logo-spin infinite 20s linear}}.card{padding:var(--spacing-5)}.read-the-docs{color:var(--gray-600)}.loading-container{display:flex;justify-content:center;align-items:center;min-height:100vh;font-size:1.2rem;color:#333}.icon.play{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%236c757d'%3E%3Cpath d='M8 5v14l11-7z'/%3E%3C/svg%3E")}.icon-button:hover .icon.play{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' 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