/* 全局样式 */
body {
    margin: 0;
    font-family: 'Roboto', sans-serif;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.8), rgba(240, 240, 240, 1));
    color: #333333;
    line-height: 1.6;
}

a {
    color: #0074D9;
    text-decoration: none;
}

a[rel="nofollow"] {
    /* 特定样式可以在这里定义 */
}

header {
    background: linear-gradient(to right, #0074D9, #005C99);
    padding: 20px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

header .logo {
    font-size: 24px;
    font-weight: bold;
    color: #FFFFFF;
}

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

nav ul li a {
    color: #FFFFFF;
    font-weight: 500;
    transition: color 0.3s ease;
}

nav ul li a:hover {
    color: #FFA500;
}

.main {
    padding: 100px 40px 40px 40px;
    max-width: 1200px;
    margin: 0 auto;
}

.section {
    margin-bottom: 60px;
}

.section h2 {
    font-size: 32px;
    color: #0074D9;
    margin-bottom: 20px;
    position: relative;
}

.section h2::after {
    content: '';
    display: block;
    width: 50px;
    height: 4px;
    background: #FFA500;
    margin-top: 10px;
}

.section p {
    font-size: 16px;
    margin-bottom: 20px;
}

.code-block {
    background: #F5F5F5;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    font-family: 'Courier New', Courier, monospace;
    margin-bottom: 20px;
}

.code-block code {
    color: #D63384;
}

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

table th, table td {
    border: 1px solid #CCCCCC;
    padding: 10px;
    text-align: left;
}

table th {
    background: #0074D9;
    color: #FFFFFF;
}

.button {
    background-color: #FFA500;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    transition: transform 0.3s ease-in-out;
}

.button:hover {
    transform: scale(1.1);
}

.card {
    display: flex;
    background: #FFFFFF;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 20px;
    animation: fadeIn 1s forwards;
}

.card-left, .card-right {
    flex: 1;
    padding: 20px;
}

.card-right {
    background: #F0F0F0;
    display: flex;
    justify-content: center;
    align-items: center;
}

.card-right img {
    max-width: 100%;
    border-radius: 5px;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

footer {
    background: #005C99;
    color: #FFFFFF;
    text-align: center;
    padding: 20px 40px;
}

.footer-links {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 10px;
}

.footer-links li a {
    color: #FFFFFF;
    font-weight: 500;
}

.footer-links li a:hover {
    color: #FFA500;
}

.responsive-image {
    width: 100%;
    height: auto;
    border-radius: 5px;
}

@media (max-width: 1440px) {
    .main {
        padding: 100px 30px 30px 30px;
    }
}

@media (max-width: 1200px) {
    header {
        padding: 15px 30px;
    }

    .section h2 {
        font-size: 28px;
    }

    .section p {
        font-size: 15px;
    }
}

@media (max-width: 1024px) {
    nav ul {
        gap: 15px;
    }

    .card {
        flex-direction: column;
    }
}

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

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

    .main {
        padding: 100px 20px 20px 20px;
    }

    .section h2 {
        font-size: 24px;
    }

    .button {
        width: 100%;
        text-align: center;
    }
}

@media (max-width: 480px) {
    header .logo {
        font-size: 20px;
    }

    nav ul li a {
        font-size: 14px;
    }

    .section h2 {
        font-size: 20px;
    }

    .section p {
        font-size: 14px;
    }

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

@media (max-width: 320px) {
    header {
        padding: 10px 20px;
    }

    .main {
        padding: 100px 10px 10px 10px;
    }

    .section h2 {
        font-size: 18px;
    }

    .section p {
        font-size: 12px;
    }
}

@media (min-width: 1441px) {
    .main {
        padding: 120px 60px 60px 60px;
    }

    .section h2 {
        font-size: 36px;
    }

    .section p {
        font-size: 18px;
    }

    .button {
        padding: 12px 24px;
    }
}

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

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