* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Noto Sans SC', sans-serif;
}

@keyframes gradient {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

body {
    min-height: 100vh;
    background: linear-gradient(-45deg, #2c3e50, #3498db, #2980b9, #34495e);
    background-size: 400% 400%;
    animation: gradient 15s ease infinite;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    width: 100%;
    max-width: 1200px;
    padding: 20px;
}

.nav-wrapper {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
}

.nav-wrapper::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, 
        rgba(255, 255, 255, 0.1) 0%,
        rgba(255, 255, 255, 0) 100%);
    pointer-events: none;
}

.search-box {
    position: relative;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.search-box::after {
    content: '🔍';
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.2em;
    opacity: 0.6;
}

.search-box input {
    width: 100%;
    padding: 15px 20px;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: 12px;
    color: white;
    font-size: 16px;
    transition: all 0.3s ease;
}

.search-box input:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.15);
    box-shadow: 0 0 15px rgba(255, 255, 255, 0.1);
}

.search-box input::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.nav-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.nav-item {
    background: rgba(255, 255, 255, 0.05);
    padding: 25px;
    border-radius: 15px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.nav-item:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.nav-icon {
    font-size: 2.5em;
    margin-bottom: 15px;
}

.nav-item h3 {
    color: white;
    margin-bottom: 10px;
    font-size: 1.2em;
}

.nav-item p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9em;
}

@keyframes float {
    0% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
    100% {
        transform: translateY(0px);
    }
}

.nav-item:hover .nav-icon {
    animation: float 2s ease-in-out infinite;
}

.footer {
    width: 100%;
    text-align: center;
    padding: 15px 0;
    margin-top: 20px;
}

.beian {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.beian:hover {
    color: rgba(255, 255, 255, 0.9);
}

.header {
    text-align: center;
    margin-bottom: 30px;
    position: relative;
}

.header h1 {
    color: white;
    font-size: 2.5em;
    margin-bottom: 10px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    letter-spacing: 2px;
}

.header .subtitle {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1.1em;
    font-weight: 300;
}