/* Common styles */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.section-title {
    text-align: center;
    font-size: 32px;
    margin-bottom: 40px;
    color: #333;
}

.btn {
    display: inline-block;
    padding: 10px 25px;
    border-radius: 4px;
    background-color: #1890ff;
    color: #fff;
    transition: all 0.3s;
}

.btn:hover {
    background-color: #40a9ff;
}

/* 清除浮动 */
.clearfix::after {
    content: '';
    display: table;
    clear: both;
}

/* 文本溢出省略号 */
.text-ellipsis {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* 常用间距类 */
.mt-10 { margin-top: 10px; }
.mt-20 { margin-top: 20px; }
.mt-30 { margin-top: 30px; }
.mb-10 { margin-bottom: 10px; }
.mb-20 { margin-bottom: 20px; }
.mb-30 { margin-bottom: 30px; }

/* 常用flex布局类 */
.flex {
    display: flex;
}

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.flex-between {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.flex-column {
    display: flex;
    flex-direction: column;
}

/* 响应式隐藏类 */
@media (max-width: 768px) {
    .hidden-xs {
        display: none !important;
    }
}

@media (min-width: 769px) and (max-width: 992px) {
    .hidden-md {
        display: none !important;
    }
}

@media (min-width: 993px) {
    .hidden-lg {
        display: none !important;
    }
}