/* 通用背景样式 */
body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--background-color);
    min-height: 100vh;
}

#app {
    max-width: 1200px;
    margin: 0 auto;
    background-color: white;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    min-height: 100vh;
    position: relative;
    overflow: hidden;
}

main {
    padding: 0 15px 20px;
    padding-bottom: 80px !important; /* 确保所有页面的内容区域有足够的底部间距，避免被底部导航栏遮挡 */
}

/* 统一按钮样式 */
.btn {
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

/* 统一模态框样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.4);
    justify-content: center;
    align-items: center;
}

.modal-content {
    background-color: #fefefe;
    margin: 10% auto;
    padding: 20px;
    border: 1px solid #eee;
    width: 90%;
    max-width: 500px;
    border-radius: 12px;
    position: relative;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.close:hover,
.close:focus {
    color: black;
    text-decoration: none;
}