/* 基本样式设置 */
body {
    margin: 0;
    padding: 0;
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(135deg, #00008B, #4B0082);
    color: #D3D3D3;
    overflow-x: hidden;
}

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(30, 30, 30, 0.9);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 30px;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.navbar .logo {
    font-family: 'Roboto', sans-serif;
    font-size: 24px;
    font-weight: bold;
    color: #FFFFFF;
}

.navbar ul {
    list-style: none;
    display: flex;
    margin: 0;
    padding: 0;
}

.navbar ul li {
    margin-left: 20px;
}

.navbar ul li a {
    text-decoration: none;
    color: #FFFFFF;
    font-size: 16px;
    transition: color 0.3s ease;
}

.navbar ul li a:hover {
    color: #FFA500;
}

/* 汉堡菜单样式 */
.hamburger-menu {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger-menu div {
    width: 25px;
    height: 3px;
    background-color: #FFFFFF;
    margin: 4px 0;
    transition: all 0.3s ease;
}

/* 主内容区 */
.main {
    padding-top: 80px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.main h1 {
    font-family: 'Roboto', sans-serif;
    font-size: 48px;
    color: #FFFFFF;
    margin-bottom: 20px;
}

.main p {
    font-size: 18px;
    line-height: 1.6;
    max-width: 800px;
    margin-bottom: 40px;
    color: #D3D3D3;
}

.button {
    background: linear-gradient(135deg, #FFA500, #FF4500);
    color: #FFFFFF;
    border: none;
    padding: 12px 30px;
    border-radius: 25px;
    font-size: 16px;
    cursor: pointer;
    transition: transform 0.3s ease, background 0.3s ease;
}

.button:hover {
    transform: scale(1.05);
    background: linear-gradient(135deg, #FF4500, #FFA500);
}

/* 卡片式设计 */
.card-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
    padding: 40px 20px;
}

.card {
    background-color: #2E2E2E;
    border-radius: 10px;
    width: 300px;
    padding: 20px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
}

.card img {
    width: 100%;
    height: auto;
    border-radius: 5px;
}

.card h3 {
    font-family: 'Roboto', sans-serif;
    font-size: 24px;
    color: #FFFFFF;
    margin: 15px 0 10px 0;
}

.card p {
    font-size: 16px;
    line-height: 1.5;
    color: #D3D3D3;
}

/* 示例展示区 */
.sample-display {
    background-color: #1E1E1E;
    padding: 40px 20px;
    margin: 40px 0;
    border-radius: 10px;
}

.sample-display h2 {
    font-family: 'Roboto', sans-serif;
    font-size: 32px;
    color: #FFFFFF;
    margin-bottom: 20px;
}

.sample-display article {
    text-align: left;
}

.sample-display h3, .sample-display h4 {
    font-family: 'Roboto', sans-serif;
    color: #FFA500;
}

.sample-display p {
    font-size: 16px;
    line-height: 1.6;
    color: #D3D3D3;
}

.sample-display pre {
    background-color: #2E2E2E;
    padding: 15px;
    border-radius: 5px;
    overflow: auto;
    margin: 15px 0;
}

.sample-display code {
    font-family: 'Courier New', Courier, monospace;
    color: #00FF7F;
}

/* 按钮样式 */
button {
    background-color: #FFA500;
    color: #FFFFFF;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #FF4500;
}

/* 数据可视化图表 */
.chart-container {
    width: 100%;
    max-width: 800px;
    margin: 40px auto;
    background-color: #2E2E2E;
    padding: 20px;
    border-radius: 10px;
}

.chart-container canvas {
    width: 100%;
    height: auto;
}

/* 响应式设计 */
@media (max-width: 1440px) {
    .main h1 {
        font-size: 42px;
    }
    .card {
        width: 280px;
    }
}

@media (max-width: 1200px) {
    .navbar ul {
        display: flex;
    }
    .main h1 {
        font-size: 36px;
    }
    .card {
        width: 250px;
    }
}

@media (max-width: 1024px) {
    .card-container {
        flex-direction: column;
        align-items: center;
    }
    .sample-display {
        padding: 30px 15px;
    }
}

@media (max-width: 768px) {
    .navbar ul {
        display: none;
    }
    .hamburger-menu {
        display: flex;
    }
    .main h1 {
        font-size: 30px;
    }
    .card {
        width: 100%;
    }
    .sample-display h2 {
        font-size: 28px;
    }
}

@media (max-width: 480px) {
    .main p, .sample-display p {
        font-size: 14px;
    }
    .navbar {
        padding: 10px 20px;
    }
    .main h1 {
        font-size: 24px;
    }
}

@media (max-width: 320px) {
    .main h1 {
        font-size: 20px;
    }
    .button {
        padding: 8px 16px;
        font-size: 14px;
    }
    .sample-display h2 {
        font-size: 24px;
    }
}

/* 动画效果 */
@keyframes aurora-move {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

body {
    background: radial-gradient(circle, rgb(255, 87, 34), transparent);
    animation: aurora-move 15s linear infinite;
}

/* 图片样式 */
img.decorative {
    width: 100%;
    height: auto;
    border-radius: 5px;
}

/* 提示信息 */
.reference-note {
    font-size: 16px;
    color: #FFA500;
    text-align: center;
    margin: 20px 0;
}

/* 菜单动画 */
.nav-active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 60px;
    right: 20px;
    background-color: rgba(30, 30, 30, 0.95);
    padding: 10px;
    border-radius: 5px;
}

.nav-active ul {
    flex-direction: column;
}

.nav-active ul li {
    margin: 10px 0;
}

.nav-active ul li a {
    font-size: 18px;
}

/* 图标动画 */
svg.icon {
    fill: #FFFFFF;
    transition: transform 0.3s ease;
}

svg.icon:hover {
    transform: scale(1.2);
}