/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Roboto Mono', monospace;
    background: linear-gradient(135deg, #000f4c, #006eff);
    color: #ffffff;
    line-height: 1.6;
    padding: 20px;
}

header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    padding: 15px 30px;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.5);
}

header h1 {
    font-size: 1.5rem;
    text-transform: uppercase;
    text-shadow: 0 0 10px #00ff88;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 20px;
}

nav ul li a {
    color: #ffffff;
    text-decoration: none;
    position: relative;
    padding: 5px 0;
}

nav ul li a::after {
    content: '';
    position: absolute;
    width: 0%;
    height: 2px;
    background: #00ff88;
    left: 0;
    bottom: 0;
    transition: width 0.3s;
}

nav ul li a:hover::after {
    width: 100%;
}

.sidebar {
    position: fixed;
    right: 20px;
    top: 60px;
    background: rgba(0, 15, 76, 0.8);
    padding: 15px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.5);
}

.sidebar a {
    display: block;
    color: #00ff88;
    text-decoration: none;
    margin-bottom: 10px;
    font-size: 0.9rem;
}

.sidebar a:hover {
    text-decoration: underline;
}

.main-content {
    max-width: 1200px;
    margin: 100px auto 50px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.main-content h2, .main-content h3, .main-content h4 {
    text-transform: uppercase;
    text-shadow: 0 0 5px #00ff88;
    margin-bottom: 15px;
}

.main-content p {
    margin-bottom: 15px;
    font-size: 1rem;
}

.main-content pre {
    background: rgba(0, 15, 76, 0.9);
    padding: 15px;
    border-radius: 10px;
    overflow-x: auto;
    margin-bottom: 20px;
}

.main-content code {
    color: #00ff88;
    font-family: 'Roboto Mono', monospace;
}

.image-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.image-gallery img {
    width: 100%;
    border-radius: 10px;
    transition: transform 0.3s;
}

.image-gallery img:hover {
    transform: scale(1.05);
}

footer {
    text-align: center;
    padding: 20px;
    background: rgba(0, 15, 76, 0.9);
    border-radius: 10px;
    margin-top: 50px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.5);
}

footer p {
    color: #ffffff;
    font-size: 0.9rem;
}

.code-preview {
    background: rgba(255, 255, 255, 0.2);
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 20px;
    overflow-x: auto;
}

.code-preview pre {
    background: transparent;
    padding: 0;
}

@media (max-width: 768px) {
    header {
        flex-direction: column;
        align-items: flex-start;
    }

    nav ul {
        flex-direction: column;
        gap: 10px;
    }

    .sidebar {
        display: none;
    }

    .main-content {
        margin: 80px 10px 20px;
    }

    .image-gallery {
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .main-content {
        margin: 90px auto 30px;
    }
}

@media (min-width: 1025px) and (max-width: 1200px) {
    .main-content {
        margin: 100px auto 40px;
    }
}

@media (min-width: 1201px) {
    .main-content {
        margin: 120px auto 50px;
    }
}

.button {
    display: inline-block;
    padding: 10px 20px;
    background: #00ff88;
    color: #000f4c;
    text-decoration: none;
    border-radius: 5px;
    transition: background 0.3s;
    text-transform: uppercase;
    font-weight: bold;
}

.button:hover {
    background: #00c466;
}

@keyframes rotate {
    from {
        transform: rotateY(0deg);
    }
    to {
        transform: rotateY(360deg);
    }
}

.model:hover {
    animation: rotate 5s infinite linear;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 15, 76, 0.8);
    justify-content: center;
    align-items: center;
    z-index: 2000;
}

.modal-content {
    background: rgba(255, 255, 255, 0.1);
    padding: 30px;
    border-radius: 15px;
    position: relative;
    max-width: 600px;
    width: 90%;
}

.modal-content h3 {
    margin-bottom: 20px;
}

.close-button {
    position: absolute;
    top: 15px;
    right: 20px;
    color: #ffffff;
    font-size: 1.5rem;
    cursor: pointer;
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.2rem;
    }

    nav ul li a {
        font-size: 0.9rem;
    }

    .button {
        padding: 8px 16px;
    }
}