.sidenav {
    height: 100%;
    width: 250px;
    position: fixed;
    z-index: 1;
    top: 0;
    left: 0;
    background-color: white;
    overflow-x: hidden;
    padding-top: 20px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

.nav-title {
    padding: 10px 15px;
    text-decoration: none;
    font-size: 25px;
    color: #2196F3;
    display: block;
}

.nav-item {
    padding: 10px 15px;
    text-decoration: none;
    font-size: 18px;
    color: #2196F3;
    display: block;
}

.nav-item:hover {
    background-color: #f1f1f1;
}

.content {
    margin-left: 260px;
    padding: 20px;
}

.entry {
    padding: 20px;
    background: white;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.entry-title {
    color: #2196F3;
    margin-bottom: 20px;
}

.submit-btn {
    font-size: 34px;
    border-radius: 30px;
    width: 15%;
    height: 66px;
    border-width: 1px;
    background: #2196F3;
    color: white;
    border: none;
    cursor: pointer;
    transition: background 0.3s;
}

.submit-btn:hover {
    background: #1976D2;
}

input[type="text"],
input[type="password"] {
    padding: 8px;
    margin: 5px 0;
    border: 1px solid #ddd;
    border-radius: 4px;
    width: 200px;
}

hr {
    border: none;
    border-top: 1px solid #eee;
    margin: 20px 0;
}

/* 主页样式 */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: #f8f9fa;
}

.site-header {
    padding: 4rem 0;
    text-align: center;
}

.site-title {
    font-size: 3rem;
    font-weight: 300;
    color: #343a40;
    margin-bottom: 1rem;
}

.app-card {
    transition: transform 0.2s, box-shadow 0.2s;
    margin-bottom: 1.5rem;
    height: 100%;
    border-radius: 1rem;
}

.app-card .card-body {
    padding: 1.5rem;
}

/* 确保卡片行之间有间距 */
.row > [class*="col-"] {
    margin-bottom: 1.5rem;
}

.app-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 .5rem 1rem rgba(0,0,0,.15);
}

.app-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: #0d6efd;
    min-height: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.app-icon span {
    font-size: 3rem;
}

.app-icon img {
    height: 3rem;
    width: auto;
    object-fit: contain;
}

.app-title {
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.app-description {
    color: #6c757d;
    font-size: 0.9rem;
}