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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background: #fff;
    padding: 2rem 1rem;
}

.container {
    max-width: 800px;
    margin: 0 auto;
}

h1 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: #111;
}

h2 {
    font-size: 1.5rem;
    margin: 2rem 0 1rem;
    color: #222;
    border-bottom: 1px solid #eee;
    padding-bottom: 0.3rem;
}

h3 {
    font-size: 1.2rem;
    margin: 1.5rem 0 0.8rem;
    color: #222;
}

p {
    margin-bottom: 1rem;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 0.8rem 0 1.5rem;
}

td {
    padding: 0.6rem 0;
    vertical-align: top;
    border-bottom: 1px solid #f0f0f0;
    text-align: left;
    /* 全局左对齐 */
}

/* 第一列：固定宽度，左对齐 */
td:first-child {
    width: 35%;
    font-weight: 500;
    white-space: nowrap;
}

/* 第二列：自动换行，占满剩余空间 */
td:last-child {
    width: 65%;
    word-wrap: break-word;
    word-break: break-word;
    white-space: normal;
}

a {
    color: #0066cc;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

#toc {
    background: #f9f9f9;
    padding: 1rem;
    margin-bottom: 2rem;
    border-radius: 6px;
}

#toc h3 {
    margin-top: 0;
    margin-bottom: 0.5rem;
}

#toc ul {
    list-style: none;
}

#toc li {
    margin: 0.3rem 0;
}

#toc li li {
    margin-left: 1rem;
}