* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Microsoft YaHei', sans-serif;
}

body {
    background: url("../../../background.png") no-repeat center center fixed;
    background-size: cover;
    min-height: 100vh;
}

h1 {
    text-align: center;
}

p {
    text-align: center;
    padding-top: 10px;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 50px;
    background-color: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(5px);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo img {
    height: 40px;
    max-width: 180px;
    transition: transform 0.3s;
}

.logo:hover img {
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links li {
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: #2c3e50;
    font-weight: 500;
    padding: 10px 15px;
    border-radius: 5px;
    transition: all 0.3s;
    position: relative;
}

.nav-links a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: #3498db;
    transition: width 0.3s;
}

.nav-links a:hover::before {
    width: 100%;
}

.nav-links a:hover {
    color: #3498db;
}

.back-button {
    position: fixed;
    left: 50px;
    top: 90px;
    display: flex;
    align-items: center;
    color: #3498db;
    text-decoration: none;
    font-weight: 500;
    padding: 8px 15px;
    border-radius: 20px;
    background: rgba(255,255,255,0.9);
    backdrop-filter: blur(2px);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    z-index: 100;
}

.back-button::before {
    content: '';
    display: block;
    width: 12px;
    height: 12px;
    border-left: 2px solid #3498db;
    border-bottom: 2px solid #3498db;
    transform: rotate(45deg);
    margin-right: 8px;
    transition: all 0.3s;
}

.back-button:hover {
    transform: translateX(-5px);
    background: rgba(255,255,255,1);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.back-button:hover::before {
    border-color: #2980b9;
}

.content-container {
    width: 90%;
    max-width: 1200px;
    margin: 100px auto;
    padding: 30px;
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(3px);
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

.data-table th, 
.data-table td {
    padding: 12px 15px;
    border: 1px solid #ddd;
    text-align: center;
}

.data-table th {
    background-color: rgba(255,255,255,0.7);
    font-weight: bold;
}

.data-table tr:nth-child(even) {
    background-color: rgba(255,255,255,0.5);
}

.data-table tr:hover {
    background-color: rgba(255,255,255,0.8);
}

td#high {
    background-color: rgba(252, 205, 86, 0.9);
}

td#high:hover {
    background-color: rgba(246, 186, 35, 0.9);
}

td#low {
    background-color: rgba(102, 219, 252, 0.9);
}

td#low:hover {
    background-color: rgba(43, 203, 248, 0.95);
}

.tooltip {
    position: relative;
}

.tooltip-content {
    visibility: hidden;
    width: 300px;
    background-color: rgba(20,20,20,0.75);
    color: #eee;
    text-align: center;
    border-radius: 4px;
    padding: 10px;
    position: absolute;
    z-index: 100;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    transition: opacity 0.3s;
    font-size: 14px;
    line-height: 1.5;
    white-space: normal;
}

.tooltip.show .tooltip-content {
    visibility: visible;
    opacity: 1;
}

@media (max-width: 768px) {
    .navbar {
        padding: 10px 20px;
    }
    
    .back-button {
        left: 20px;
        top: 70px;
    }
    
    .content-container {
        width: 95%;
        padding: 20px;
    }
    
    .data-table th, 
    .data-table td {
        padding: 8px 10px;
        font-size: 0.9em;
    }
}