/* 基础样式和变量 */
:root {
    --primary-bg: #1E1E1E;
    --secondary-bg: #2E2E2E;
    --accent-gold: #FFD700;
    --accent-blue: #00BFFF;
    --accent-green: #32CD32;
    --text-color: #FFFFFF;
    --secondary-text: #CCCCCC;
    --font-primary: 'Roboto', sans-serif;
    --font-secondary: 'Open Sans', sans-serif;
}

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

body {
    background: linear-gradient(135deg, var(--primary-bg), #0D0D0D);
    color: var(--text-color);
    font-family: var(--font-secondary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 250px;
    height: 100vh;
    background: var(--primary-bg);
    padding: 20px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    border-right: 1px solid #333333;
    z-index: 1000;
}

.navbar h1 {
    font-family: var(--font-primary);
    font-size: 24px;
    color: var(--accent-gold);
    margin-bottom: 40px;
    text-align: center;
}

.navbar ul {
    list-style: none;
}

.navbar li {
    margin-bottom: 20px;
}

.navbar a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 18px;
    transition: color 0.3s ease;
}

.navbar a:hover {
    color: var(--accent-blue);
}

/* 主内容区域 */
.main-content {
    margin-left: 250px;
    padding: 40px;
    background: linear-gradient(135deg, #1E1E1E, #0D0D0D);
    min-height: 100vh;
    animation: backgroundMove 30s linear infinite;
}

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

/* 标题样式 */
h2 {
    font-family: var(--font-primary);
    font-size: 32px;
    color: var(--accent-gold);
    margin-bottom: 20px;
}

h3, h4 {
    font-family: var(--font-primary);
    color: var(--accent-blue);
    margin-top: 30px;
    margin-bottom: 15px;
}

h3 {
    font-size: 24px;
}

h4 {
    font-size: 20px;
}

/* 段落样式 */
p {
    font-size: 16px;
    color: var(--text-color);
    margin-bottom: 20px;
    line-height: 1.8;
}

/* 代码块样式 */
pre {
    background: #2E2E2E;
    padding: 15px;
    border-radius: 8px;
    overflow-x: auto;
    margin-bottom: 20px;
}

code {
    font-family: 'Courier New', Courier, monospace;
    color: var(--accent-green);
    font-size: 14px;
}

/* 按钮样式 */
button, .button {
    background-color: var(--accent-gold);
    color: var(--primary-bg);
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
    font-size: 16px;
    font-family: var(--font-secondary);
}

button:hover, .button:hover {
    background-color: #F4A460;
    box-shadow: 0 0 10px var(--accent-gold);
}

/* 卡片设计 */
.card {
    background-color: var(--secondary-bg);
    border: 1px solid #444444;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 12px rgba(0, 0, 0, 0.2);
}

.card h3 {
    color: var(--accent-blue);
    margin-bottom: 10px;
}

.card p {
    color: var(--text-color);
    font-size: 14px;
}

/* 图像样式 */
.image-gallery {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 30px;
}

.image-gallery img {
    width: 100px;
    height: 100px;
    object-fit: cover;
    border-radius: 5px;
}

/* 动画效果 */
.progress-bar {
    width: 0%;
    height: 5px;
    background-color: var(--accent-blue);
    transition: width 1s linear;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translate3d(0, 40px, 0);
    }
    to {
        opacity: 1;
        transform: translate3d(0, 0, 0);
    }
}

.fade-in-up {
    animation: fadeInUp 1s ease-out forwards;
}

/* 代码展示样式 */
.code-sample {
    background: #2E2E2E;
    padding: 15px;
    border-radius: 8px;
    overflow-x: auto;
    margin-bottom: 20px;
}

.code-sample code {
    color: var(--accent-green);
    font-family: 'Courier New', Courier, monospace;
    font-size: 14px;
}

/* 响应式设计 */
@media (max-width: 1440px) {
    .navbar {
        width: 220px;
    }
    .main-content {
        margin-left: 220px;
    }
}

@media (max-width: 1200px) {
    .navbar {
        width: 200px;
    }
    .main-content {
        margin-left: 200px;
        padding: 30px;
    }
}

@media (max-width: 1024px) {
    .navbar {
        width: 180px;
    }
    .main-content {
        margin-left: 180px;
        padding: 25px;
    }
}

@media (max-width: 768px) {
    .navbar {
        position: relative;
        width: 100%;
        height: auto;
        border-right: none;
        border-bottom: 1px solid #333333;
    }
    .navbar ul {
        display: flex;
        justify-content: space-around;
    }
    .main-content {
        margin-left: 0;
        padding: 20px;
    }
}

@media (max-width: 480px) {
    .navbar a {
        font-size: 16px;
    }
    h2 {
        font-size: 28px;
    }
    h3 {
        font-size: 22px;
    }
    h4 {
        font-size: 18px;
    }
    p {
        font-size: 14px;
    }
    .image-gallery img {
        width: 80px;
        height: 80px;
    }
}

@media (max-width: 320px) {
    .navbar h1 {
        font-size: 20px;
    }
    .navbar a {
        font-size: 14px;
    }
    h2 {
        font-size: 24px;
    }
    h3 {
        font-size: 20px;
    }
    h4 {
        font-size: 16px;
    }
    p {
        font-size: 12px;
    }
    .image-gallery img {
        width: 70px;
        height: 70px;
    }
}

/* 特殊样式 */
.sample-display {
    border: 2px dashed var(--accent-blue);
    padding: 20px;
    border-radius: 8px;
    margin-top: 40px;
    background: rgba(30, 30, 30, 0.8);
}

.sample-display h2 {
    color: var(--accent-gold);
    margin-bottom: 15px;
}

.sample-display p {
    color: var(--secondary-text);
    font-size: 14px;
}

.footer {
    text-align: center;
    padding: 20px;
    margin-top: 40px;
    color: var(--secondary-text);
    font-size: 14px;
    border-top: 1px solid #444444;
}