/* 基础样式 */
body {
    margin: 0;
    padding: 0;
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(135deg, #0F4C81, #6573C3, #A5D8FF);
    color: #ffffff;
    line-height: 1.6;
    background-size: 400% 400%;
    animation: gradientAnimation 15s ease infinite;
}

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

header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(15, 76, 129, 0.8);
    padding: 20px 0;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

header nav {
    width: 90%;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header nav a {
    color: #FFD700;
    text-decoration: none;
    margin: 0 15px;
    font-family: 'Montserrat', sans-serif;
    font-weight: bold;
    transition: color 0.3s ease;
}

header nav a:hover {
    color: #A5D8FF;
}

.container {
    max-width: 1200px;
    margin: 100px auto 50px auto;
    padding: 20px;
    background: rgba(0, 0, 0, 0.5);
    border-radius: 10px;
}

h1, h2, h3, h4 {
    font-family: 'Montserrat', sans-serif;
    color: #FFD700;
    margin-bottom: 20px;
}

h1 {
    font-size: 2.5em;
}

h2 {
    font-size: 2em;
}

h3 {
    font-size: 1.75em;
}

h4 {
    font-size: 1.5em;
}

p {
    margin-bottom: 15px;
    font-size: 1em;
    color: #ffffff;
}

pre {
    background: rgba(255, 255, 255, 0.1);
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    margin-bottom: 20px;
}

code {
    font-family: 'Courier New', Courier, monospace;
    color: #A5D8FF;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
}

table, th, td {
    border: 1px solid #6573C3;
}

th, td {
    padding: 10px;
    text-align: left;
}

th {
    background: #6573C3;
}

ul, ol {
    margin-bottom: 20px;
    padding-left: 20px;
}

li {
    margin-bottom: 10px;
}

button {
    background: linear-gradient(90deg, #0F4C81, #6573C3);
    color: #ffffff;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s ease;
    font-family: 'Montserrat', sans-serif;
    font-weight: bold;
}

button:hover {
    background: linear-gradient(90deg, #6573C3, #A5D8FF);
}

img {
    width: 100%;
    max-width: 320px;
    height: auto;
    border-radius: 10px;
    margin: 10px;
}

.footer {
    background: rgba(15, 76, 129, 0.8);
    padding: 20px 0;
    text-align: center;
    color: #FFD700;
    position: fixed;
    width: 100%;
    bottom: 0;
}

.aurora-move {
    animation: aurora 15s linear infinite;
}

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

/* 响应式设计 */
@media (max-width: 1440px) {
    .container {
        max-width: 1024px;
    }
}

@media (max-width: 1200px) {
    .container {
        max-width: 960px;
    }
}

@media (max-width: 1024px) {
    header nav {
        flex-direction: column;
    }

    header nav a {
        margin: 10px 0;
    }

    .container {
        padding: 15px;
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: 2em;
    }

    h2 {
        font-size: 1.75em;
    }

    h3 {
        font-size: 1.5em;
    }

    h4 {
        font-size: 1.25em;
    }

    button {
        padding: 8px 16px;
    }
}

@media (max-width: 480px) {
    header nav a {
        margin: 5px 0;
    }

    .container {
        padding: 10px;
    }
}

@media (max-width: 320px) {
    h1 {
        font-size: 1.75em;
    }

    h2 {
        font-size: 1.5em;
    }

    h3 {
        font-size: 1.25em;
    }

    h4 {
        font-size: 1em;
    }

    button {
        padding: 6px 12px;
        font-size: 0.9em;
    }
}