:root {
    --background-color: #f0f2f5;
    --primary-text-color: #333;
    --secondary-text-color: #666;
    --button-bg-color: #4CAF50;
    --button-hover-bg-color: #45a049;
    --modal-bg-color: #fefefe;
    --modal-border-color: #888;
    --dropdown-bg-color: #f9f9f9;
    --dropdown-hover-bg-color: #f1f1f1;
    --nav-bg-color: #fff;
    --nav-shadow-color: rgba(0, 0, 0, 0.1);
    --form-bg-color: #fff;
    --form-shadow-color: rgba(0, 0, 0, 0.1);
    --input-border-color: #ccc;
}

@media (prefers-color-scheme: dark) {
    :root {
        --background-color: #121212;
        --primary-text-color: #e0e0e0;
        --secondary-text-color: #b3b3b3;
        --button-bg-color: #3d8c3d;
        --button-hover-bg-color: #337a33;
        --modal-bg-color: #1e1e1e;
        --modal-border-color: #444;
        --dropdown-bg-color: #1e1e1e;
        --dropdown-hover-bg-color: #2d2d2d;
        --nav-bg-color: #1e1e1e;
        --nav-shadow-color: rgba(255, 255, 255, 0.1);
        --form-bg-color: #1e1e1e;
        --form-shadow-color: rgba(255, 255, 255, 0.1);
        --input-border-color: #444;
    }
}

body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    background-color: var(--background-color);
    color: var(--primary-text-color);
}

.container {
    padding: 20px;
    max-width: 800px;
    margin: 0 auto;
}

h2 {
    text-align: center;
    margin-top: 20px;
    color: var(--primary-text-color);
}

nav {
    text-align: center;
    margin-bottom: 5px;
    background-color: transparent;
    padding: 10px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 4px var(--nav-shadow-color);
    backdrop-filter: blur(10px); /* 添加高斯模糊效果 */
    -webkit-backdrop-filter: blur(10px); /* 兼容Safari */
}

nav a {
    margin: 0 10px;
    text-decoration: none;
    color: var(--primary-text-color);
}

.form-container {
    background-color: var(--form-bg-color);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 8px var(--form-shadow-color);
    margin-bottom: 20px;
}

form {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    color: var(--secondary-text-color);
}

input[type="text"], input[type="number"] {
    width: 100%;
    padding: 12px 20px;
    margin: 8px 0;
    display: inline-block;
    border: 1px solid var(--input-border-color);
    border-radius: 4px;
    box-sizing: border-box;
    background-color: var(--form-bg-color);
    color: var(--primary-text-color);
}

button {
    width: 100%;
    background-color: var(--button-bg-color);
    color: var(--primary-text-color);
    padding: 14px 20px;
    margin: 8px 0;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

button:hover {
    background-color: var(--button-hover-bg-color);
}

.dropdown-content {
    display: none;
    position: absolute;
    background-color: var(--dropdown-bg-color);
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2);
    z-index: 1;
}

.dropdown-content a {
    color: var(--primary-text-color);
    padding: 12px 16px;
    text-decoration: none;
    display: block;
}

.dropdown-content a:hover {
    background-color: var(--dropdown-hover-bg-color);
}

.show {
    display: block;
}

.modal {
    display: none;
    position: fixed;
    z-index: 1;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgb(0, 0, 0);
    background-color: rgba(0, 0, 0, 0.4);
    display: flex;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background-color: var(--modal-bg-color);
    padding: 20px;
    border: 1px solid var(--modal-border-color);
    width: 80%;
    max-width: 500px;
    border-radius: 4px;
}

.close {
    color: var(--secondary-text-color);
    float: right;
    font-size: 28px;
    font-weight: bold;
}

.close:hover, .close:focus {
    color: var(--primary-text-color);
    text-decoration: none;
    cursor: pointer;
}

.delete-button {
    float: right;
    margin-left: 10px;
    color: var(--secondary-text-color);
    cursor: pointer;
}

.active:hover {
    background-color: var(--input-border-color);
}

footer {
    text-align: center;
    margin-top: 20px;
    padding: 10px;
    position: relative;
    color: #666;
  }
  
  footer::before {
    content: "";
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80%; /* 分割线宽度 */
    height: 1px;
    background-color: #ccc;
  }
  
  footer a {
    color: #007bff;
    text-decoration: none;
  }
  
  footer a:hover {
    text-decoration: underline;
  }

@media (max-width: 600px) {
    .container {
        padding: 10px;
    }
    h2 {
        font-size: 24px;
    }
    input[type="text"], input[type="number"] {
        padding: 10px 15px;
    }
    button {
        padding: 10px 15px;
    }
}