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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f4f6f9;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    background-color: #4a6fa5;
    color: white;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

header h1 {
    font-size: 1.8rem;
}

nav a, nav span {
    color: white;
    margin-left: 1.5rem;
    text-decoration: none;
}

nav a:hover {
    text-decoration: underline;
}

main {
    padding: 2rem;
    min-height: calc(100vh - 120px);
}

h2 {
    margin-bottom: 1.5rem;
    color: #333;
    border-bottom: 2px solid #4a6fa5;
    padding-bottom: 0.5rem;
}

/* 表单样式 */
input[type="text"],
input[type="email"],
input[type="password"],
textarea,
select {
    width: 100%;
    padding: 0.8rem;
    margin: 0.5rem 0;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

input[type="file"] {
    margin: 0.5rem 0;
}

button,
.btn {
    background-color: #4a6fa5;
    color: white;
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    margin-top: 0.5rem;
}

button:hover,
.btn:hover {
    background-color: #3a5a8c;
}

.message {
    padding: 1rem;
    margin: 1rem 0;
    border-radius: 4px;
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

/* 代码卡片网格 */
.code-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.code-card {
    background: white;
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    border-top: 4px solid #4a6fa5;
}

.code-card h3 {
    margin-bottom: 0.5rem;
    color: #333;
}

.code-card p {
    margin-bottom: 0.8rem;
    color: #666;
    font-size: 0.9rem;
}

.btn {
    background-color: #28a745;
}

.btn:hover {
    background-color: #218838;
}

/* 认证页面 */
.auth-container {
    max-width: 400px;
    margin: 4rem auto;
    padding: 2rem;
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.auth-container h2 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: #333;
}

.auth-container p {
    text-align: center;
    margin-top: 1rem;
}

.auth-container a {
    color: #4a6fa5;
    text-decoration: none;
}

.auth-container a:hover {
    text-decoration: underline;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .code-grid {
        grid-template-columns: 1fr;
    }
    
    header {
        flex-direction: column;
        text-align: center;
    }
    
    nav a, nav span {
        margin: 0.5rem;
    }
    
    .auth-container {
        margin: 2rem auto;
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    body {
        font-size: 14px;
    }
    
    .auth-container {
        margin: 1rem;
        padding: 1rem;
    }
}

/* 搜索框样式 */
.search-form {
    display: flex;
    margin: 1rem 0 2rem 0;
    max-width: 500px;
}

.search-form input[type="text"] {
    flex: 1;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 4px 0 0 4px;
    font-size: 1rem;
}

.search-form button {
    padding: 0.8rem 1.5rem;
    border: none;
    background-color: #4a6fa5;
    color: white;
    border-radius: 0 4px 4px 0;
    cursor: pointer;
}

.search-form button:hover {
    background-color: #3a5a8c;
}

/* 版本历史 */
.version-history {
    margin-top: 1rem;
    border-top: 1px dashed #aaa;
    padding-top: 0.5rem;
}

.version-history summary {
    cursor: pointer;
    font-weight: bold;
    color: #4a6fa5;
}

.version-history ul {
    list-style: none;
    padding-left: 0;
    margin-top: 0.5rem;
}

.version-history li {
    border-bottom: 1px solid #eee;
    padding: 0.5rem 0;
    font-size: 0.9em;
}

.btn-small {
    font-size: 0.8em;
    padding: 0.3rem 0.7rem;
    background-color: #6c757d;
    margin-top: 0.3rem;
}

.btn-small:hover {
    background-color: #5a6268;
}