/* style-vintage.css */
body {
    background-color: #cfd8dc;
    padding: 20px;
}

.letter-container {
    max-width: 700px;
    margin: 0 auto;
    background: #fff;
    /* 模拟红格线 */
    background-image: linear-gradient(#f1f1f1 1px, transparent 1px), 
                      linear-gradient(90deg, rgba(255,0,0,0.1) 1px, transparent 1px);
    background-size: 100% 2.5em; /* 行高需与此匹配 */
    line-height: 2.5em;
    padding: 50px;
    border: 2px solid #b71c1c;
    font-family: "SimSun", "STSong", serif;
}

.salutation {
    border-bottom: 2px solid #b71c1c; /* 模拟标题线 */
    display: inline-block;
}

.content p {
    text-indent: 2em;
}

.wish-suffix {
    text-decoration: underline;
}

.footer {
    text-align: right;
    color: #b71c1c; /* 怀旧红色字体 */
}