/* ===== 基础样式重置 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', 'Arial', sans-serif;
    line-height: 1.6;
    color: #fff;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

/* ===== 通用容器样式 ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* ===== 通用按钮样式 ===== */
.btn {
    display: inline-block;
    padding: 12px 30px;
    background-color: #1e88e5;
    color: #fff;
    border-radius: 4px;
    transition: all 0.3s;
    font-weight: 500;
    font-size: 16px;
    border: none;
    cursor: pointer;
}

.btn:hover {
    background-color: #1565c0;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(30, 136, 229, 0.3);
}

.btn:active {
    transform: translateY(0);
}

.btn-blue {
    background-color: #1e88e5;
}

/* ===== 通用标题样式 ===== */
.section-title {
    text-align: center;
    margin-bottom: 50px;
    font-size: 36px;
    color: #333;
    position: relative;
    padding-bottom: 20px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background-color: #1e88e5;
    border-radius: 2px;
}

/* ===== 通用响应式样式 ===== */
@media (max-width: 992px) {
    .container {
        max-width: 960px;
        padding: 0 20px;
    }
    
    .section-title {
        font-size: 32px;
    }
}

@media (max-width: 768px) {
    .container {
        max-width: 100%;
        padding: 0 20px;
    }
    
    .section-title {
        font-size: 28px;
        margin-bottom: 40px;
    }
    
    .btn {
        padding: 10px 24px;
        font-size: 14px;
    }
}

@media (max-width: 576px) {
    .container {
        padding: 0 15px;
    }
    
    .section-title {
        font-size: 24px;
        margin-bottom: 30px;
    }
    
    .btn {
        padding: 8px 20px;
        font-size: 13px;
    }
}

@media (max-width: 320px) {
    .container {
        padding: 0 10px;
    }
    
    .section-title {
        font-size: 22px;
    }
    
    .btn {
        padding: 8px 16px;
        font-size: 12px;
    }
}