* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* 顶部功能栏 */
        .top-bar {
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(10px);
            padding: 15px 30px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.2);
        }

        .top-bar-content {
            display: flex;
            align-items: center;
            gap: 15px;
            flex-wrap: wrap;
        }

        .back-btn {
            padding: 10px 20px;
            background: rgba(255, 255, 255, 0.2);
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: white;
            border-radius: 8px;
            cursor: pointer;
            font-size: 14px;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }

        .back-btn:hover {
            background: rgba(255, 255, 255, 0.3);
        }

        /* 官方信息 */
        .official-info-bar {
            display: flex;
            align-items: center;
            gap: 30px;
            flex: 1;
            justify-content: center;
            flex-wrap: wrap;
        }

        .info-item-bar {
            display: flex;
            align-items: center;
            gap: 8px;
            color: white;
            font-size: 13px;
        }

        .info-label-bar {
            opacity: 0.9;
        }

        .info-value-bar {
            color: #FFD700;
            font-weight: 600;
            text-decoration: none;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .info-value-bar:hover {
            opacity: 0.8;
            text-decoration: underline;
        }

        .invitation-code-bar {
            background: #c0392b;
            color: white;
            padding: 8px 16px;
            border-radius: 6px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }

        .invitation-code-bar:hover {
            background: #a93226;
            transform: scale(1.05);
        }

        /* 复制提示 */
        .copy-tooltip {
            position: fixed;
            top: 20px;
            right: 20px;
            background: #2ecc71;
            color: white;
            padding: 12px 20px;
            border-radius: 8px;
            font-size: 14px;
            z-index: 2000;
            animation: slideIn 0.3s ease;
            display: none;
        }

        .copy-tooltip.show {
            display: block;
        }

        @keyframes slideIn {
            from {
                opacity: 0;
                transform: translateY(-20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .feedback-buttons {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .feedback-btn {
            padding: 10px 18px;
            background: rgba(255, 255, 255, 0.2);
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: white;
            border-radius: 8px;
            cursor: pointer;
            font-size: 13px;
            transition: all 0.3s ease;
            white-space: nowrap;
        }

        .feedback-btn:hover {
            background: rgba(255, 255, 255, 0.3);
            transform: translateY(-2px);
        }

        /* 主容器 */
        .main-content {
            flex: 1;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 40px 20px;
        }

        .container {
            background: rgba(255, 255, 255, 0.95);
            border-radius: 20px;
            padding: 60px 40px;
            max-width: 700px;
            width: 100%;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
            backdrop-filter: blur(10px);
        }

        .title {
            text-align: center;
            margin-bottom: 10px;
        }

        .title h1 {
            font-size: 32px;
            color: #333;
            margin-bottom: 5px;
        }

        .title p {
            color: #999;
            font-size: 14px;
        }

        .official-badge {
            text-align: center;
            margin: 30px 0;
        }

        .badge-icon {
            font-size: 60px;
            margin-bottom: 10px;
        }

        .badge-text {
            color: #c0392b;
            font-weight: 600;
            font-size: 16px;
        }

        .input-group {
            margin: 30px 0;
        }

        .input-label {
            display: block;
            margin-bottom: 10px;
            color: #333;
            font-weight: 600;
            font-size: 14px;
        }

        .input-wrapper {
            display: flex;
            gap: 10px;
        }

        input[type="text"] {
            flex: 1;
            padding: 12px 16px;
            border: 2px solid #e0e0e0;
            border-radius: 10px;
            font-size: 14px;
            transition: all 0.3s ease;
        }

        input[type="text"]:focus {
            outline: none;
            border-color: #667eea;
            box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
        }

        .verify-btn {
            padding: 12px 30px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border: none;
            border-radius: 10px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            font-size: 14px;
        }

        .verify-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
        }

        .verify-btn:disabled {
            opacity: 0.6;
            cursor: not-allowed;
        }

        .progress-container {
            margin: 30px 0;
            display: none;
        }

        .progress-bar {
            width: 100%;
            height: 6px;
            background: #e0e0e0;
            border-radius: 10px;
            overflow: hidden;
        }

        .progress-fill {
            height: 100%;
            background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
            width: 0%;
            animation: progress 2s ease-in-out forwards;
        }

        @keyframes progress {
            0% { width: 0%; }
            50% { width: 70%; }
            100% { width: 100%; }
        }

        .progress-text {
            text-align: center;
            color: #667eea;
            font-size: 12px;
            margin-top: 8px;
            font-weight: 600;
        }

        .result {
            margin-top: 30px;
            padding: 20px;
            border-radius: 10px;
            text-align: center;
            display: none;
        }

        .result.success {
            background: rgba(46, 204, 113, 0.1);
            border: 2px solid #2ecc71;
        }

        .result.error {
            background: rgba(231, 76, 60, 0.1);
            border: 2px solid #e74c3c;
        }

        .result-icon {
            font-size: 48px;
            margin-bottom: 10px;
        }

        .result-title {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .result.success .result-title {
            color: #2ecc71;
        }

        .result.error .result-title {
            color: #e74c3c;
        }

        .result-text {
            font-size: 14px;
            color: #666;
            line-height: 1.6;
        }

        .info-box {
            background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
            border-left: 4px solid #667eea;
            padding: 15px;
            border-radius: 8px;
            margin-top: 20px;
            font-size: 13px;
            color: #555;
            line-height: 1.6;
        }

        .info-box strong {
            color: #333;
        }

        /* 模态框 */
        .modal-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            z-index: 1000;
            align-items: center;
            justify-content: center;
        }

        .modal-overlay.active {
            display: flex;
        }

        .modal-content {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-radius: 20px;
            padding: 40px;
            max-width: 450px;
            width: 90%;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
            animation: slideUp 0.3s ease;
        }

        @keyframes slideUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .modal-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
            border-bottom: 2px solid #667eea;
            padding-bottom: 15px;
        }

        .modal-title {
            font-size: 20px;
            font-weight: 600;
            color: #333;
        }

        .modal-close {
            background: none;
            border: none;
            font-size: 24px;
            cursor: pointer;
            color: #999;
            transition: color 0.3s ease;
        }

        .modal-close:hover {
            color: #333;
        }

        .modal-body {
            color: #666;
            line-height: 1.8;
            margin-bottom: 25px;
            font-size: 14px;
        }

        .modal-footer {
            display: flex;
            gap: 10px;
        }

        .modal-btn {
            flex: 1;
            padding: 12px;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            font-weight: 600;
            transition: all 0.3s ease;
            font-size: 14px;
        }

        .modal-btn-close {
            background: #e0e0e0;
            color: #333;
        }

        .modal-btn-close:hover {
            background: #d0d0d0;
        }

        .modal-btn-contact {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
        }

        .modal-btn-contact:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
        }

        @media (max-width: 1024px) {
            .top-bar-content {
                flex-direction: column;
                align-items: flex-start;
            }

            .official-info-bar {
                width: 100%;
                justify-content: flex-start;
            }

            .feedback-buttons {
                width: 100%;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 40px 20px;
            }

            .title h1 {
                font-size: 24px;
            }
        }