body {
    background: linear-gradient(120deg, #e0e7ff 0%, #f8fafc 100%);
    font-family: 'Segoe UI', Arial, sans-serif;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 1200px;
    margin: 30px auto;
    padding: 24px;
    background: #fff;
    border-radius: 18px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.12);
}

header {
    text-align: center;
    padding: 32px 0 20px 0;
    background: linear-gradient(90deg, #007BFF 60%, #00c6ff 100%);
    color: #fff;
    border-radius: 14px 14px 0 0;
    box-shadow: 0 4px 12px rgba(0,123,255,0.08);
}

    header h1 {
        font-size: 2.8rem;
        margin: 0;
        letter-spacing: 2px;
    }

    header p {
        font-size: 1.25rem;
        margin-top: 12px;
        opacity: 0.92;
    }


.taskbar {
    margin: 28px 0;
    padding: 22px 18px;
    background: #f4f8fb;
    border: 1.5px solid #e3e8ee;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

    .taskbar h2 {
        margin-bottom: 18px;
        font-size: 1.35rem;
        color: #007BFF;
        font-weight: 600;
    }

    .taskbar .task-buttons {
        display: flex;
        flex-wrap: wrap;
        gap: 14px;
    }

    .taskbar button {
        flex: 1 1 180px;
        padding: 12px 0;
        background: linear-gradient(90deg, #007BFF 70%, #00c6ff 100%);
        color: #fff;
        border: none;
        border-radius: 7px;
        font-size: 1.08rem;
        font-weight: 500;
        cursor: pointer;
        transition: background 0.2s, transform 0.15s;
        box-shadow: 0 2px 6px rgba(0,123,255,0.08);
    }

        .taskbar button:hover {
            background: linear-gradient(90deg, #0056b3 60%, #00aaff 100%);
            transform: translateY(-2px) scale(1.04);
        }

.content {
    padding: 28px 22px;
    background: #f9fafb;
    border: 1.5px solid #e3e8ee;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

    .content h2 {
        font-size: 1.5rem;
        color: #007BFF;
        margin-bottom: 16px;
    }

    .content ul {
        list-style: none;
        padding: 0;
    }

    .content li {
        padding: 14px 18px;
        margin: 12px 0;
        background: #fff;
        border: 1.5px solid #e3e8ee;
        border-radius: 7px;
        box-shadow: 0 1px 4px rgba(0,0,0,0.06);
        font-size: 1.08rem;
        color: #333;
    }

footer {
    text-align: center;
    margin-top: 28px;
    padding: 14px 0;
    background: linear-gradient(90deg, #007BFF 60%, #00c6ff 100%);
    color: #fff;
    border-radius: 0 0 14px 14px;
    font-size: 1rem;
    box-shadow: 0 -2px 8px rgba(0,123,255,0.08);
}
/* 导航栏悬停效果 */
.hover-primary {
    transition: color 0.2s ease-in-out;
}

    .hover-primary:hover {
        color: #0d6efd !important; /* Bootstrap Primary Color */
    }

/* 下拉菜单美化 */
.dropdown-menu {
    border-radius: 8px;
    margin-top: 10px !important; /* 让下拉菜单稍微跟导航栏有点距离 */
}

.dropdown-item {
    padding: 8px 20px;
    font-size: 14px;
}

    .dropdown-item:active {
        background-color: #0d6efd;
    }