:root {
    --neon-pink: #ff00ff;
    --neon-blue: #00ffff;
    --neon-purple: #9900ff;
    --neon-green: #00ff66;
    --dark-bg: #0a0a12;
    --darker-bg: #050508;
    --text: #e0e0e0;
}

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

body {
    background-color: var(--dark-bg);
    color: var(--text);
    background-image: 
        linear-gradient(0deg, transparent 24%, rgba(32, 32, 64, .05) 25%, rgba(32, 32, 64, .05) 26%, transparent 27%, transparent 74%, rgba(32, 32, 64, .05) 75%, rgba(32, 32, 64, .05) 76%, transparent 77%, transparent),
        linear-gradient(90deg, transparent 24%, rgba(32, 32, 64, .05) 25%, rgba(32, 32, 64, .05) 26%, transparent 27%, transparent 74%, rgba(32, 32, 64, .05) 75%, rgba(32, 32, 64, .05) 76%, transparent 77%, transparent);
    background-size: 50px 50px;
    min-height: 100vh;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.guide-header {
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
}

.guide-header h1 {
    font-size: 3rem;
    color: var(--neon-blue);
    text-shadow: 0 0 10px var(--neon-blue);
    margin-bottom: 1rem;
    text-transform: uppercase;
}

.guide-content {
    background: rgba(10, 10, 20, 0.7);
    border-radius: 10px;
    padding: 2rem;
    border: 1px solid var(--neon-blue);
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    margin-bottom: 2rem;
}

.guide-section {
    margin-bottom: 2rem;
}

.guide-section h2 {
    color: var(--neon-pink);
    text-shadow: 0 0 5px var(--neon-pink);
    margin-bottom: 1rem;
    font-size: 1.8rem;
    border-bottom: 2px solid var(--neon-pink);
    padding-bottom: 0.5rem;
}

.recipe-card {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 8px;
    padding: 1.5rem;
    margin: 1rem 0;
    border: 1px solid var(--neon-blue);
}

.recipe-card h3 {
    color: var(--neon-green);
    margin-bottom: 1rem;
}

.recipe-steps {
    list-style: none;
}

.recipe-steps li {
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
}

.recipe-steps li::before {
    content: ">";
    position: absolute;
    left: 0;
    color: var(--neon-blue);
}

.warning {
    background: rgba(255, 0, 0, 0.1);
    border: 1px solid #ff0000;
    padding: 1rem;
    border-radius: 5px;
    margin: 1rem 0;
    color: #ff6b6b;
}

.back-button {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    background: rgba(0, 255, 255, 0.1);
    border: 1px solid var(--neon-blue);
    color: var(--neon-blue);
    text-decoration: none;
    border-radius: 5px;
    transition: all 0.3s ease;
    margin-bottom: 2rem;
}

.back-button:hover {
    background: var(--neon-blue);
    color: var(--darker-bg);
    box-shadow: 0 0 15px var(--neon-blue);
}

.cyber-line {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--neon-blue), transparent);
    animation: scanline 8s linear infinite;
}

@keyframes scanline {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/**
 * @description Styles for Font Awesome icons inside elements with the .btn class.
 *              Adjusts spacing, size, and opacity for icons within buttons.
 *              Primarily used on the index.html page for guide buttons.
 */
.btn i {
    margin-right: 0.6em; /* 图标和文字之间的距离 */
    font-size: 0.9em; /* 可以微调图标大小，相对于按钮文字 */
    opacity: 0.8; /* 让图标稍微柔和一点，可选 */
}