/* 背景和字体设置 */
body {
    background: linear-gradient(120deg, #a0e7e5, #b4f8c8); /* 渐变背景 */
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: #333;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}

/* 标题样式 */
h1 {
    color: #004d40;
    font-weight: bold;
    margin-bottom: 1.5rem;
    font-size: 2rem;
    transition: font-size 0.3s ease;
    opacity: 0;
    animation: fadeIn 0.8s forwards;
}

/* 卡片样式 */
.card {
    border: none;
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease, margin 0.3s ease;
    background-color: white;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    opacity: 0;
    animation: fadeIn 1s ease forwards;
    animation-delay: 0.3s;
}

/* 卡片内容 */
.card-body {
    padding: 20px;
    transition: padding 0.3s ease;
}

/* 卡片标题 */
.card-title {
    font-weight: bold;
    color: #00796b;
    transition: color 0.3s ease;
}

/* 卡片文本 */
.card-text {
    font-size: 0.9rem;
    color: #555;
    margin-bottom: 1rem;
}

/* 卡片悬停效果 */
.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.card:hover .card-title {
    color: #004d40;
}

.card-body:hover {
    padding: 25px;
}

/* 按钮样式 */
.btn-primary {
    background-color: #00796b;
    border: none;
    transition: background-color 0.3s ease, transform 0.3s ease;
    border-radius: 5px;
    font-weight: bold;
    padding: 10px 20px;
}

.btn-primary:hover {
    background-color: #004d40;
    transform: scale(1.05);
}

.btn-primary:active {
    transform: scale(0.98);
}

/* 入场动画 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 响应式调整 */
@media (max-width: 576px) {
    h1 {
        font-size: 1.5rem;
    }

    .card-body {
        padding: 15px;
    }

    .btn-primary {
        width: 100%;
    }
}

@media (max-width: 992px) {
    .card-body {
        padding: 18px;
    }
}