.bd-placeholder-img {
    font-size: 1.125rem;
    text-anchor: middle;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    object-fit: cover;
    width: 100%;
}

footer {
    padding-top: 3rem;
    padding-bottom: 3rem;
}

footer p {
    margin-bottom: .25rem;
}


/* Carousel base class */
.carousel {
    margin-bottom: 56px;
}

/* Center align the text within the three columns below the carousel */
.marketing .col-lg-4 {
    margin-bottom: 1.5rem;
    text-align: center;
}

.marketing h2 {
    font-weight: 400;
}

.marketing .col-lg-4 p {
    margin-right: .75rem;
    margin-left: .75rem;
}


/* RESPONSIVE CSS
-------------------------------------------------- */

@media (min-width: 40em) {
    /* Bump up size of carousel content */
    .carousel-caption p {
        margin-bottom: 1.25rem;
        font-size: 1.25rem;
        line-height: 1.4;
    }
}

/* 统一字体和颜色 */
body {
    font-family: Arial, sans-serif;
    color: #333;
}

/* 设置页面标题样式 */
h1 {
    font-size: 36px;
    text-align: center;
    margin: 40px 0;
}

/* 设置二级标题样式 */
h2 {
    font-size: 24px;
    margin: 20px 0;
}

/* 设置段落样式 */
p {
    font-size: 16px;
    line-height: 1.5;
    margin-bottom: 20px;
}

/* 设置列表样式 */
ul {
    list-style: none;
    padding-left: 0;
    margin-bottom: 20px;
}

li {
    font-size: 16px;
    line-height: 1.5;
    margin-bottom: 10px;
}

/* 设置链接样式 */
a {
    color: #0066cc;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.past-articles {
    background-color: #f5f5f5;
    padding: 20px;
    border-radius: 5px;
}

.past-articles h2 {
    font-size: 24px;
    margin-bottom: 10px;
}

.past-articles ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.past-articles li {
    margin-bottom: 10px;
}

.past-articles a {
    text-decoration: none;
    color: #333;
}

.past-articles a:hover {
    color: #007bff;
}

.past-articles .date {
    color: #999;
    font-size: 14px;
    margin-left: 10px;
}