/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

/* 移动端头部 */
.mobile-header {
    background-color: darkred;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-size: 1.2rem;
    font-weight: bold;
    color: black;
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.user-info {
    font-size: 0.9rem;
    color: blue;
}

/* 主要内容区域 */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
    min-height: calc(100vh - 120px);
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    text-decoration: none;
    font-size: 0.9rem;
    cursor: pointer;
    border: none;
    transition: all 0.3s ease;
}

.btn-primary {
    background-color: #4285f4;
    color: white;
}

.btn-primary:hover {
    background-color: #3367d6;
}

.btn-secondary {
    background-color: #f1f1f1;
    color: #333;
}

.btn-secondary:hover {
    background-color: #ddd;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* 搜索框样式 */
.search-container {
    margin-bottom: 1.5rem;
}

.search-form {
    display: flex;
}

.search-input-container {
    display: flex;
    width: 100%;
    border: 1px solid #ddd;
    border-radius: 4px;
    overflow: hidden;
}

#search-input {
    flex: 1;
    padding: 0.75rem;
    border: none;
    outline: none;
    font-size: 1rem;
}

.search-btn {
    padding: 0.75rem 1rem;
    background-color: #f1f1f1;
    border: none;
    cursor: pointer;
    transition: background-color 0.3s;
}

.search-btn:hover {
    background-color: #e0e0e0;
}

/* 注意实现框样式 */
.notice-banner {
  background: yellowgreen; /* 浅黄色背景，类似警告 */
  border-left: 4px solid #ffc107;
  padding: 16px;
  margin: 16px 0;
  font-size: 16px;
  line-height: 1.5;
  color: #5f5f5f;
  border-radius: 0 8px 8px 0;
  box-shadow: 0 2px 6px rgba(0,0,0,0.05);
  max-width: 100%;
  word-break: break-word;
}

/* 文章列表样式 */
.articles-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.articles-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.article-item {
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    padding: 1rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

.article-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.article-link {
    text-decoration: none;
    color: inherit;
}

.article-title {
    font-size: 1.1rem;
    font-weight: 500;
    margin: 0;
    color: #333;
}

.no-articles {
    text-align: center;
    padding: 2rem;
    color: #666;
}

/* 加载更多 */
.load-more-container {
    text-align: center;
    margin-top: 1.5rem;
}

.loading {
    text-align: center;
    padding: 1rem;
}

.loading.hidden {
    display: none;
}

/* 文章详情页 */
.article-detail {
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    padding: 1.5rem;
}

.article-detail .article-title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    border-bottom: 1px solid #eee;
    padding-bottom: 1rem;
}

.article-content {
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: 2rem;
}

.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
    margin: 1rem 0;
}

.back-link {
    margin-top: 1rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.options-container h2 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

.options-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    margin: 1rem 0;
}

.option-item .btn {
    width: 100%;
    padding: 1rem;
    text-align: center;
    font-size: 1.1rem;
}

/* 登录页面 */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 70vh;
}

.login-form-wrapper {
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    padding: 2rem;
    width: 100%;
    max-width: 400px;
}

.login-title {
    text-align: center;
    margin-bottom: 1.5rem;
    color: #333;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

.form-group input:focus {
    outline: none;
    border-color: #4285f4;
    box-shadow: 0 0 0 2px rgba(66, 133, 244, 0.2);
}

.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.alert {
    padding: 0.75rem;
    border-radius: 4px;
    margin-bottom: 1rem;
}

.alert-error {
    background-color: #fce8e6;
    color: #c5221f;
    border: 1px solid #fad2cf;
}

.login-info {
    margin-top: 1.5rem;
    text-align: center;
    font-size: 0.9rem;
    color: #666;
}

/* 移动端底部 */
.mobile-footer {
    background-color: #fff;
    border-top: 1px solid #eee;
    text-align: center;
    padding: 1rem;
    font-size: 0.8rem;
    color: #666;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header-content {
        padding: 0.75rem;
    }
    
    .main-content {
        padding: 0.75rem;
    }
    
    .article-detail {
        padding: 1rem;
    }
    
    .login-form-wrapper {
        padding: 1.5rem;
        margin: 0 0.5rem;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .options-list {
        grid-template-columns: 1fr;
    }
    
    .back-link {
        flex-direction: column;
    }
}