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

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f8f9fa;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            background-color: #fff;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
            min-height: 100vh;
        }

        .header {
            background: linear-gradient(135deg, #009688 50%, #009600 100%);
            color: white;
            padding: 40px 20px;
            text-align: center;
        }

        .header h1 {
            font-size: 2.5rem;
            font-weight: 600;
            margin-bottom: 10px;
        }

        .subtitle {
            font-size: 0.8rem;
            opacity: 0.9;
        }

        .meta-info {
            background-color: #f1f3f4;
            padding: 20px;
            border-left: 4px solid #009688;
            margin: 20px;
            border-radius: 0 8px 8px 0;
        }

        .meta-info .date {
            color: #666;
            font-size: 0.9rem;
            margin-bottom: 10px;
        }

        .content {
            padding: 30px;
            max-width: 900px;
            margin: 0 auto;
        }

        .section {
            margin-bottom: 40px;
        }

        .section-title {
            font-size: 1.5rem;
            font-weight: 600;
            color: #2c3e50;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid #e9ecef;
            position: relative;
        }

        .section-title::before {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 60px;
            height: 2px;
            background: linear-gradient(135deg, #009688 50%, #009600 100%);
        }

        .subsection {
            margin-bottom: 25px;
        }

        .subsection-title {
            font-size: 1.2rem;
            font-weight: 600;
            color: #34495e;
            margin-bottom: 15px;
            position: relative;
            padding-left: 20px;
        }

        .subsection-title::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 20px;
            background: linear-gradient(135deg, #009688 50%, #009600 100%);
            border-radius: 2px;
        }

        .text-content {
            font-size: 1rem;
            line-height: 1.8;
            color: #555;
            margin-bottom: 15px;
        }

        .list {
            margin: 15px 0;
            padding-left: 20px;
            list-style: none;
        }

        .list li {
            margin-bottom: 8px;
            position: relative;
            padding-left: 15px;
        }

        .list li::before {
            content: '•';
            color: #667eea;
            font-weight: bold;
            position: absolute;
            left: 0;
        }

        .numbered-list {
            counter-reset: item;
            list-style: none;
            padding-left: 0;
        }

        .numbered-list > li {
            counter-increment: item;
            margin-bottom: 20px;
            position: relative;
            padding-left: 40px;
        }

        .numbered-list > li::before {
            content: counter(item);
            background: linear-gradient(135deg, #009688 50%, #009600 100%);
            color: white;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            position: absolute;
            left: 0;
            top: 2px;
            font-size: 0.9rem;
        }

        .sub-list {
            margin-top: 10px;
            padding-left: 20px;
            list-style: none;
        }

        .sub-list li {
            margin-bottom: 5px;
            color: #666;
            font-size: 0.95rem;
            position: relative;
            padding-left: 15px;
        }

        .sub-list li::before {
            content: '◦';
            color: #667eea;
            position: absolute;
            left: 0;
        }

        .highlight-box {
            background: linear-gradient(135deg, #f8f9ff 0%, #e3f2fd 100%);
            border: 1px solid #e3f2fd;
            border-radius: 8px;
            padding: 20px;
            margin: 20px 0;
            position: relative;
        }

        .highlight-box::before {
            content: '⚠️';
            position: absolute;
            top: 20px;
            left: 20px;
            font-size: 1.2rem;
        }

        .highlight-box .content {
            padding-left: 35px;
        }

        .important-note {
            background: linear-gradient(135deg, #fff3cd 0%, #ffeaa7 100%);
            border: 1px solid #ffc107;
            border-radius: 8px;
            padding: 20px;
            margin: 20px 0;
            position: relative;
        }

        .important-note::before {
            content: '📋';
            position: absolute;
            top: 20px;
            left: 20px;
            font-size: 1.2rem;
        }

        .important-note .content {
            padding-left: 35px;
        }

        .contact-info {
            background: linear-gradient(135deg, #e8f5e8 0%, #f0f8f0 100%);
            border-radius: 12px;
            padding: 25px;
            margin: 30px 0;
            border: 1px solid #c8e6c9;
        }

        .contact-info h3 {
            color: #2e7d32;
            margin-bottom: 15px;
            font-size: 1.3rem;
        }

        .contact-item {
            display: flex;
            align-items: center;
            margin-bottom: 10px;
            color: #2e7d32;
        }

        .contact-item .icon {
            margin-right: 10px;
            font-size: 1.1rem;
        }

        .data-table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
            background: white;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        }

        .data-table th,
        .data-table td {
            padding: 12px 15px;
            text-align: left;
            border-bottom: 1px solid #e9ecef;
        }

        .data-table th {
            background: linear-gradient(135deg, #009688 50%, #009600 100%);
            color: white;
            font-weight: 600;
        }

        .data-table tr:hover {
            background-color: #f8f9fa;
        }

        .footer {
            background-color: #009688;
            background-opacity: 0.2;
            background-color: rgba(0, 150, 136, 0.2);
            color: #333;
            text-align: center;
            padding: 30px 20px;
        }

        .footer-content {
            max-width: 600px;
            margin: 0 auto;
        }

        .copyright {
            font-size: 0.9rem;
            opacity: 0.8;
        }

        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: linear-gradient(135deg, #009688 50%, #009600 100%);
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            border: none;
            cursor: pointer;
            display: none;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
            transition: all 0.3s ease;
        }

        .back-to-top:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(102, 126, 234, 0.4);
        }

        @media (max-width: 768px) {
            .header h1 {
                font-size: 2rem;
            }
            
            .content {
                padding: 20px;
            }
            
            .meta-info {
                margin: 10px;
            }
            
            .back-to-top {
                bottom: 20px;
                right: 20px;
                width: 45px;
                height: 45px;
            }

            .data-table {
                font-size: 0.9rem;
            }

            .data-table th,
            .data-table td {
                padding: 8px 10px;
            }
        }

        .scroll-indicator {
            position: fixed;
            top: 0;
            left: 0;
            width: 0%;
            height: 3px;
            background: linear-gradient(135deg, #009688 50%, #009600 100%);
            z-index: 1000;
            transition: width 0.1s ease;
        }

        .toc {
            background: #f8f9fa;
            border-radius: 8px;
            padding: 20px;
            margin: 20px 0;
            border: 1px solid #e9ecef;
        }

        .toc h3 {
            color: #2c3e50;
            margin-bottom: 15px;
        }

        .toc ul {
            list-style: none;
            padding-left: 0;
        }

        .toc li {
            margin-bottom: 5px;
        }

        .toc a {
            color: #009688;
            text-decoration: none;
            padding: 5px 0;
            display: block;
        }

        .toc a:hover {
            color: #009600;
            text-decoration: underline;
        }