.strength-section {
    width: 100%;
    padding: 70px 0;
    background-color: #f9f9f9;
    box-sizing: border-box;
}
.strength-section * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
}
/* 全局容器设置 */
.container {
    max-width: 1792px;
    margin: 0 auto;
    padding: 0 200px;
}
/* 标题区域 */
.strength-header {
    text-align: center;
    margin-bottom: 50px;
}
.main-title {
    font-size: 40px;
    color: #3A5EA8;
    margin-bottom: 12px;
    font-family: "AlimamaSans", "阿里妈妈数黑体", Arial, sans-serif;
    font-weight: 700;
}
.sub-title {
    font-size: 20px;
    color: #778088;
}
/* 卡片四栏布局 */
.strength-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 28px;
}
/* 卡片基础样式【初始状态统一和卡片1一致：白底、显示图标、标题，描述隐藏】 */
.strength-card {
    min-height: 360px;
    background: #ffffff;
    border-radius: 14px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 30px 24px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}
/* 初始：描述文字隐藏 */
.strength-card .card-desc {
    height: 0;
    overflow: hidden;
    margin-top: 0;
    font-size: 16px;
    line-height: 1.7;
    transition: all 0.3s ease;
}
/* 初始：图标显示 */
.strength-card .card-icon {
    margin-bottom: 24px;
    transition: all 0.3s ease;
}
/* 初始标题颜色 */
.strength-card .card-name {
    font-size: 28px;
    font-weight: bold;
    color: #1a1a1a;
    transition: all 0.3s ease;
}

/* ===== hover交互样式（鼠标移入变成蓝色卡片样式，对应卡片2效果） ===== */
.strength-card:hover {
    background-color: #0066cc;
    transform: translateY(-8px);
    box-shadow: 0 12px 30px rgba(0, 102, 204, 0.18);
}
/* hover 图标消失 */
.strength-card:hover .card-icon {
    opacity: 0;
    height: 0;
    margin-bottom: 0;
}
/* hover 标题变白 */
.strength-card:hover .card-name {
    color: #ffffff;
}
/* hover 展开描述文本 */
.strength-card:hover .card-desc {
    height: auto;
    margin-top: 22px;
    color: #fff;
}

/* ========== 移动端自适应 ========== */
@media (max-width: 1024px) {
    .container {
        padding: 0 20px;
    }
    .strength-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    .main-title {
        font-size: 20px;
    }
    .card-name {
        font-size: 22px;
    }
}
@media (max-width: 640px) {
    .strength-grid {
        grid-template-columns: 1fr;
    }
}