/* 简洁学术风格 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Times New Roman", Times, "SimSun", "宋体", serif;
    background: #fff;
    color: #000;
    line-height: 1.6;
    font-size: 15px;
}

.container {
    max-width: 800px;
    margin: 40px auto;
    padding: 0 20px;
}

/* 顶部 */
header {
    display: flex;
    align-items: flex-start;
    gap: 30px;
    margin-bottom: 25px;
}

.avatar img {
    width: 130px;
    height: 170px;
    object-fit: cover;
    border: 1px solid #999;
    background: #eee;
}

.header-info h1 {
    font-size: 28px;
    font-weight: bold;
    margin-bottom: 8px;
    letter-spacing: 1px;
}

.header-info p {
    margin: 3px 0;
    font-size: 15px;
}

hr {
    border: none;
    border-top: 1px solid #333;
    margin: 20px 0;
}

/* 主体 */
section {
    margin-bottom: 22px;
}

section h2 {
    font-size: 17px;
    font-weight: bold;
    margin-bottom: 10px;
    color: #000;
}

section p {
    text-align: justify;
    margin-bottom: 8px;
}

ul, ol {
    padding-left: 22px;
    margin-top: 6px;
}

li {
    margin-bottom: 6px;
    text-align: justify;
}

/* 论文加粗和斜体 */
b {
    font-weight: bold;
}

i {
    font-style: italic;
}

/* 页脚 */
footer {
    margin-top: 30px;
    padding-bottom: 20px;
}

footer p {
    text-align: center;
    font-size: 13px;
    color: #333;
}

/* 响应式 */
@media (max-width: 600px) {
    header {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .avatar img {
        width: 110px;
        height: 145px;
    }

    .container {
        margin: 20px auto;
    }
}