/* 全局样式定义 */
:root {
    --primary-color: #002F5D;
    --accent-color: #FFC700;
    --background-color: #F4F6F8;
    --neon-pink: #FF1493;
    --gradient-bg: radial-gradient(circle, rgba(0, 47, 93, 0.8), transparent);
    --shadow-effect: 0 4px 10px rgba(0, 0, 0, 0.2);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    background: var(--gradient-bg);
    color: #333;
    overflow-x: hidden;
}

h1, h2, h3 {
    font-family: 'Helvetica', sans-serif;
    color: var(--primary-color);
}

.container {
    max-width: 1200px;
    margin: auto;
    padding: 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.card {
    flex: 1 1 calc(33.33% - 1rem);
    background: linear-gradient(135deg, #ffffff, #f0f0f0);
    padding: 1rem;
    border-radius: 10px;
    box-shadow: var(--shadow-effect);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
}

img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}

button {
    background: var(--accent-color);
    color: white;
    padding: 0.7rem 1.5rem;
    border: none;
    border-radius: 25px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

button:hover {
    background: #FFD32A;
    transform: scale(1.05);
}

pre {
    background: #2d2d2d;
    color: #fff;
    padding: 1rem;
    border-radius: 5px;
    overflow-x: auto;
}

code {
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9rem;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    box-shadow: var(--shadow-effect);
}

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

th {
    background: var(--primary-color);
    color: white;
}

tr:nth-child(even) {
    background: #f9f9f9;
}

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

.loader {
    border: 4px solid var(--background-color);
    border-top: 4px solid var(--accent-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 20px auto;
    display: block;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@media (max-width: 768px) {
    .card {
        flex: 1 1 100%;
    }

    pre {
        font-size: 0.8rem;
    }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 1s ease-in-out;
}