.about-container {
    padding: 15px;
    margin-bottom: 60px;
}

.section-title {
    font-size: 16px;
    font-weight: bold;
    color: #333;
    margin: 10px 0;
    padding: 15px 10px;
    border-left: 3px solid #2181d9;
    background: #fff;
    position: relative;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

.section-title:after {
    content: '';
    width: 10px;
    height: 10px;
    border-right: 2px solid #666;
    border-bottom: 2px solid #666;
    transform: rotate(45deg);
    transition: transform 0.3s;
    margin-right: 10px;
}

.section-title.active:after {
    transform: rotate(-135deg);
}

.content-box {
    background: #fff;
    padding: 15px 15px 0;
    margin-bottom: 10px;
    display: none;
    border-bottom-left-radius: 8px;
    border-bottom-right-radius: 8px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

.content-box.active {
    display: block;
    padding: 15px;
}

.content-box .active {
    background: #f7f7f7;
}

.content-box p {
    font-size: 14px;
    line-height: 1.6;
    color: #666;
    margin-bottom: 10px;
    text-indent: 2em;
}

.competition-item {
    border-bottom: 1px solid #eee;
    padding-bottom: 15px;
    margin-bottom: 15px;
}

.competition-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.competition-title {
    font-size: 15px;
    color: #333;
    margin-bottom: 10px;
    font-weight: bold;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px;
}

.competition-title:after {
    content: '';
    width: 8px;
    height: 8px;
    border-right: 2px solid #666;
    border-bottom: 2px solid #666;
    transform: rotate(45deg);
    transition: transform 0.3s;
    margin-left: 10px;
}

.competition-title.active:after {
    transform: rotate(-135deg);
}

.competition-content {
    display: none;
    padding-left: 15px;
}

.competition-content.active {
    display: block;
}

.conditions-list {
    padding-left: 15px;
}

.conditions-list p {
    text-indent: 0;
    position: relative;
    padding-left: 15px;
    margin-bottom: 5px;
}

.conditions-list p:before {
    content: "•";
    position: absolute;
    left: 0;
    color: #2181d9;
}

/* 面包屑导航 */
.breadcrumb {
    padding: 10px 15px;
    margin: 0;
    background: none;
    font-size: 14px;
}

.breadcrumb a {
    color: #2181d9;
    text-decoration: none;
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    right: 15px;
    bottom: 80px;
    width: 40px;
    height: 40px;
    background: rgba(33, 129, 217, 0.8);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    display: none;
    z-index: 99;
}

/* 添加展开/收起动画 */
.content-box {
    transition: all 0.3s ease-in-out;
    overflow: hidden;
}