/* 全局样式 */
body {
    font-family: Arial, sans-serif;
    margin: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background-image: url('assets/background.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

header {
    background-color: #005691;
    color: white;
    padding: 20px;
    text-align: center;
}

nav ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

nav ul li {
    margin: 10px;
}

nav ul li a {
    color: white;
    text-decoration: none;
    padding: 12px 24px;
    border-radius: 8px;
    background-color: rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
    font-size: 20px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    display: inline-block;
}

nav ul li a:hover {
    background-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

main.container {
    background-color: rgba(255, 255, 255, 0.8);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    width: 80%;
    max-width: 600px;
    margin: 20px auto;
    text-align: center;
    flex: 1;
}

main.container p {
    font-size: 18px;
    text-align: left;
    text-indent: 2em;
}

h2 {
    color: #007BFF;
}

button {
    padding: 10px 20px;
    background-color: #007BFF;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    margin-top: 10px;
}

button:hover {
    background-color: #0056b3;
}

a {
    display: block;
    margin-top: 10px;
    color: #007BFF;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

textarea {
    width: 100%;
    height: 150px;
    padding: 10px;
    margin-top: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
}

/* 文字空间样式，扩大输入区域 */
#text-input {
    min-height: 300px;
    font-size: 16px;
}

/* 九宫格图片容器 */
.photo-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    max-width: 600px;
    margin: 20px auto;
}

/* 单个图片项 */
.photo-item {
    position: relative;
    overflow: hidden;
}

/* 图片样式 */
.photo-item img {
    width: 100%;
    height: auto;
    display: block;
    filter: blur(10px); /* 加重模糊效果，可根据需要调整数值 */
    transition: filter 0.3s ease;
}

/* 图片遮罩层，用于点击去除遮挡 */
.photo-item .overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7); /* 加重遮罩层透明度，可根据需要调整数值 */
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
    font-size: 20px;
    cursor: pointer;
    transition: opacity 0.3s ease;
}

/* 点击后去除遮挡和模糊效果 */
.photo-item.clicked img {
    filter: blur(0);
}

.photo-item.clicked .overlay {
    opacity: 0;
    pointer-events: none;
}

/* 图片放大查看样式 */
.photo-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.photo-modal img {
    max-width: 90%;
    max-height: 90%;
}