html,
body {
    margin: 0;
    padding: 0;
    height: 100%;
    background-color: #f9f9f9;
    font-family: Arial, sans-serif;
    color: #333;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.navbar {
    height: 49px;
    display: flex;
    align-items: center;
    box-shadow: 1px 1px 3px #e4e4e4;
}

.title {
    font-size: 1.5em;
    margin-left: 10px;
    color: #333;
}

.page-layout {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.page {
        width: 100%;
    display: flex;
    flex-direction: row;
    flex: 1;
    position: relative;

    max-width: 1400px;
    margin: 0 auto;
}

.content {
    flex: 1;
    width: 0;
}

.footer {}

.nav {
    padding: 20px;
}

.flota-nav {
    position: sticky;
    left: 0;
    top: 20px;
    width: 80px;
    padding: 40px 0;
    border-radius: 80px;
    background: linear-gradient(135deg, #4fd1ff 0%, #ff6a6a 100%);
    /* 更明亮的渐变色 */
    box-shadow: 0 8px 32px 0 rgba(80, 80, 200, 0.18), 0 2px 16px 0 rgba(255, 106, 106, 0.12);
    /* 更明显的阴影 */
    transition: background 0.3s, box-shadow 0.3s;
}

.flota-nav .item {
    display: block;
    width: 100%;
    height: 40px;
    line-height: 40px;
    color: #fff;
    text-align: center;
    cursor: pointer;
    text-decoration: none;
    font-weight: bold;
    font-size: 1.1em;
    letter-spacing: 1px;
    margin-bottom: 8px;
    transition: background 0.2s, color 0.2s, box-shadow 0.2s;
    box-shadow: 0 2px 8px 0 rgba(79, 209, 255, 0.10);
    /* item 也加轻微阴影 */
}

.flota-nav .item:hover {
    background: linear-gradient(90deg, #ffb86c 0%, #4fd1ff 100%);
    color: #fff200;
    box-shadow: 0 4px 16px 0 rgba(255, 184, 108, 0.18);
}

.flota-nav .item.active {
    background: #fff200;
    color: #ff6a6a;
    box-shadow: 0 4px 20px 0 rgba(255, 242, 0, 0.22);
}