/* 通用样式 */
body {
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 5vh 2vw;
    background: #f0f2f5;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* 标题 */
h1 {
    font-size: 2.5rem;
    font-weight: 300;
    text-align: center;
    margin-bottom: 30px;
    animation: textColorChange 5s infinite linear;
}

/* 动态文字颜色动画 */
@keyframes textColorChange {
    0% { color: #FF6F61; }
    25% { color: #6B5B95; }
    50% { color: #88B04B; }
    75% { color: #F7CAC9; }
    100% { color: #FF6F61; }
}

/* 搜索框 */
#searchBox {
    width: 80%;
    max-width: 600px;
    padding: 12px 20px;
    font-size: 1rem;
    border: 1px solid #ddd;
    border-radius: 25px;
    margin-bottom: 40px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

#searchBox:focus {
    outline: none;
    border-color: #007bff;
    box-shadow: 0 4px 10px rgba(0, 123, 255, 0.2);
}

/* 卡片容器 */
.card-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 15px;
    width: 90%;
    max-width: 1200px;
}

/* 卡片 */
.card {
    background: #ffffff;
    padding: 20px;
    border-radius: 12px;
    text-align: center;
    font-weight: normal;
    font-size: 1rem;
    color: #555;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    /* 保留并调整卡片文字颜色动画 */
    animation: cardTextColorChange 6s infinite linear;
}

/* 卡片动态文字颜色动画 */
@keyframes cardTextColorChange {
    0% { color: #555; }
    25% { color: #007bff; }
    50% { color: #28a745; }
    75% { color: #fd7e14; }
    100% { color: #555; }
}

/* 卡片悬停效果 */
.card:hover {
    background: #007bff;
    color: #ffffff;
    transform: translateY(-5px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.15);
    animation: none; /* 悬停时停止动画 */
}