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

    text-decoration:underline;
    color:#2563eb;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: #f8fafc;
    color: #0b1f33;
    line-height: 1.6;
}

/* 文档内容容器 */
.doc-content-c {
    max-width: 1100px;
    margin: 40px auto;
    padding: 50px 48px;
    background: white;
    border-radius: 32px;
    box-shadow: 0 20px 35px -12px rgba(0, 0, 0, 0.08);
    border: 1px solid #e2e8f0;
}

/* 响应式 */
@media (max-width: 768px) {
    .doc-content-c {
        margin: 20px;
        padding: 32px 24px;
    }
}

/* 头部区域 */
.doc-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 20px;
}

.doc-title {
    font-size: 2.2rem;
    font-weight: 800;
    color: #0b1f33;
    line-height: 1.3;
    margin: 0;
    background: linear-gradient(145deg, #0b1f33, #2563eb);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.pdf-download {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: #f8fafc;
    color: #2563eb;
    padding: 10px 22px;
    border-radius: 60px;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    border: 1px solid #e2e8f0;
    transition: all 0.2s;
    white-space: nowrap;
}

    .pdf-download i {
        color: #dc2626;
        font-size: 1.1rem;
    }

    .pdf-download:hover {
        background: #2563eb;
        color: white;
        border-color: #2563eb;
    }

        .pdf-download:hover i {
            color: white;
        }

.doc-subtitle {
    font-size: 1.2rem;
    color: #475569;
    margin: 16px 0 32px 0;
    padding-bottom: 20px;
    border-bottom: 2px solid #e2e8f0;
    font-weight: 500;
}

.intro-text {
    font-size: 1.1rem;
    color: #1e293b;
    line-height: 1.7;
    background: #f8fafc;
    padding: 28px 32px;
    border-radius: 24px;
    border-left: 5px solid #2563eb;
    margin-bottom: 40px;
}

.doc-section {
    margin-bottom: 48px;
}

    .doc-section h2 {
        font-size: 1.7rem;
        font-weight: 700;
        color: #0b1f33;
        margin-bottom: 20px;
        padding-bottom: 10px;
        border-bottom: 2px solid #e2e8f0;
    }

    .doc-section h3 {
        font-size: 1.3rem;
        font-weight: 600;
        color: #1e3a8a;
        margin: 28px 0 14px;
    }

    .doc-section p {
        color: #334155;
        line-height: 1.75;
        margin-bottom: 18px;
    }

    .doc-section strong {
        color: #2563eb;
        font-weight: 600;
    }

    .doc-section ul,
    .doc-section ol {
        margin: 12px 0 20px 28px;
    }

    .doc-section li {
        color: #334155;
        line-height: 1.7;
        margin-bottom: 8px;
    }

/* 表格样式 */
.doc-table {
    width: 100%;
    border-collapse: collapse;
    margin: 28px 0;
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
}

    .doc-table th {
        background: #f1f5f9;
        padding: 14px 18px;
        text-align: left;
        font-weight: 700;
        color: #0b1f33;
        border-bottom: 2px solid #e2e8f0;
    }

    .doc-table td {
        padding: 14px 18px;
        border-bottom: 1px solid #e2e8f0;
        color: #334155;
    }

    .doc-table tr:last-child td {
        border-bottom: none;
    }

.highlight-box {
    background: #f0f9ff;
    border-left: 5px solid #2563eb;
    padding: 24px 28px;
    margin: 32px 0;
    border-radius: 20px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.02);
}

    .highlight-box p {
        margin-bottom: 8px;
    }

@media (max-width: 640px) {
    .doc-table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }

    .doc-title {
        font-size: 1.8rem;
    }

    .intro-text {
        padding: 20px;
    }
}