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

/* CSS变量 - 现代化配色方案 */
:root {
    --primary-color: #6c63ff;
    --primary-dark: #5a52e0;
    --primary-light: #e0dffb;
    --secondary-color: #4a40bf;
    --text-primary: #2d2d2d;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --background: #f8fafc;
    --surface: #ffffff;
    --border: #e2e8f0;
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 全局字体和颜色方案 */
body {
    font-family: 'Inter', 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background-color: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* KU主题样式 - 现代化紫色主题 */
.ku-header {
    
    background: var(--surface);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    backdrop-filter: saturate(180%) blur(20px);
    background-color: rgba(255, 255, 255, 0.95);
    transition: all 0.3s ease;
}

.ku-header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 24px;
}

.ku-logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

.ku-nav {
    display: flex;
    align-items: center;
    gap: 24px;
}

.ku-nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    transition: var(--transition);
    padding: 8px 20px;
    border-radius: 8px;
    position: relative;
}

.ku-nav a:hover {
    color: var(--primary-color);
    background: rgba(108, 99, 255, 0.05);
    transform: translateY(-1px);
}

.ku-nav a.active {
    color: var(--primary-color);
    font-weight: 600;
    background: rgba(108, 99, 255, 0.1);
}

/* 退出登录按钮样式 */
.ku-nav a.btn-logout {
    background: rgba(239, 68, 68, 0.1);
    color: var(--error);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.ku-nav a.btn-logout:hover {
    background: rgba(239, 68, 68, 0.15);
    color: var(--error);
    transform: translateY(-1px);
}

/* 用户头像或登录按钮 */
.ku-user-section {
    display: flex;
    align-items: center;
    gap: 16px;
}

.ku-user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 14px;
}

.ku-banner {
    text-align: center;
    padding: 60px 20px 40px;
    background: linear-gradient(135deg, var(--primary-light), #f0f4ff);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.ku-banner h1 {
    font-size: 36px;
    margin-bottom: 12px;
    color: var(--text-primary);
    font-weight: 700;
}

.ku-banner p {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.ku-tags {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin: 20px auto 40px;
    flex-wrap: wrap;
    max-width: 100%;
    padding: 0 20px;
}

.ku-tag {
    padding: 12px 24px;
    border-radius: 30px;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    border: 1px solid transparent;
    background: var(--surface);
    box-shadow: var(--shadow-sm);
    white-space: nowrap;
    margin: 4px;
}

.ku-tag.active {
    background: var(--primary-color);
    color: white;
    box-shadow: 0 4px 12px rgba(108, 99, 255, 0.3);
}

.ku-tag:not(.active) {
    background: var(--surface);
    color: var(--text-secondary);
    border-color: var(--border);
}

.ku-tag:not(.active):hover {
    background: var(--primary-light);
    color: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.ku-notice-container {
    display: flex;
    justify-content: center;
    width: 100%;
    margin: 60px 0 40px;
}

.ku-notice {
    background: linear-gradient(135deg, var(--primary-light), #e6f0ff);
    border-left: 4px solid var(--primary-color);
    padding: 18px 40px;
    border-radius: 8px;
    font-size: 14px;
    color: var(--text-primary);
    text-align: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    animation: slideIn 0.4s ease-out;
    width: 90%;
    max-width: 1152px;
    box-sizing: border-box;
    position: relative;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Modal styles for article editing */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    /* animation: fadeIn 0.3s ease; */
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background-color: var(--surface);
    margin: 2% auto;
    padding: 0;
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    animation: slideInModal 0.3s ease;
}

@keyframes slideInModal {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 20px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    color: white;
    font-size: 28px;
    cursor: pointer;
    padding: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background-color 0.3s ease;
}

.modal-close:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.modal-body {
    padding: 30px;
    max-height: calc(90vh - 140px);
    overflow-y: auto;
}

.modal-footer {
    padding: 20px 30px;
    border-top: 1px solid var(--border);
    background-color: #f8fafc;
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

/* Modal form styles */
.modal-form .form-group {
    margin-bottom: 20px;
}

.modal-form .form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-primary);
}

.modal-form .form-group input,
.modal-form .form-group textarea,
.modal-form .form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border);
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    transition: var(--transition);
    background-color: var(--surface);
}

.modal-form .form-group input:focus,
.modal-form .form-group textarea:focus,
.modal-form .form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(108, 99, 255, 0.15);
}

.modal-form .form-group textarea {
    min-height: 200px;
    resize: vertical;
    font-family: inherit;
}

/* Loading state */
.modal-loading {
    display: none;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(255, 255, 255, 0.9);
    padding: 20px;
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-md);
    z-index: 1001;
}

.modal-loading.active {
    display: block;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 10px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.ku-notice .close-btn {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    cursor: pointer;
    color: var(--text-light);
    font-size: 20px;
    line-height: 1;
    transition: var(--transition);
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.ku-notice .close-btn:hover {
    color: var(--primary-color);
    background: rgba(255,255,255,0.3);
}

.ku-posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 25px;
    max-width: 1200px;
    margin: 0 auto 60px;
    padding: 0 24px;
}

.ku-post-card {
    background: var(--surface);
    border-radius: var(--border-radius);
    padding: 28px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

/* 文章图片容器 */
.ku-post-image {
    display: block;
    margin-bottom: 16px;
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition);
}

.ku-post-image:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* 文章图片缩略图 */
.ku-post-image-thumbnail {
    width: 100%;
    height: 180px;
    object-fit: cover;
    object-position: center;
    display: block;
    transition: var(--transition);
}

.ku-post-image-thumbnail:hover {
    transform: scale(1.02);
}

.ku-post-card {
    display: flex;
    flex-direction: column;
}

.ku-post-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(108, 99, 255, 0.03), transparent);
    z-index: -1;
    opacity: 0;
    transition: var(--transition);
}

.ku-post-card:hover::before {
    opacity: 1;
}

.ku-post-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.ku-post-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-top: 8px;
    margin-bottom: 16px;
    text-decoration: none;
    display: block;
    transition: var(--transition);
    line-height: 1.4;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.ku-post-excerpt {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 24px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

.ku-post-title:hover {
    color: var(--primary-color);
    transform: translateX(4px);
}

/* 无图片文章样式优化 */
.ku-post-card:not(:has(.ku-post-image)) .ku-post-title {
    margin-top: 0;
}

.ku-post-card:not(:has(.ku-post-image)) .ku-post-excerpt {
    -webkit-line-clamp: 4;
}

.ku-post-card:not(:has(.ku-post-image)) .ku-post-meta {
    padding-top: 20px;
}

.ku-post-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
    color: var(--text-secondary);
    padding-top: 18px;
    border-top: 1px solid var(--border);
    margin-top: auto;
}

.ku-post-date {
    font-size: 14px;
    color: var(--text-secondary);
}

.ku-post-views {
    display: flex;
    align-items: center;
    font-size: 14px;
    color: var(--text-secondary);
}

.ku-post-views::before {
    content: "👁️";
    margin-right: 6px;
}

.ku-load-more {
    display: block;
    margin: 60px auto;
    padding: 14px 36px;
    background: var(--surface);
    border: 2px solid var(--primary-color);
    border-radius: 30px;
    font-size: 16px;
    color: var(--primary-color);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.ku-load-more::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: 0.5s;
    z-index: -1;
}

.ku-load-more:hover::before {
    left: 100%;
}

.ku-load-more:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.ku-main {
    padding: 0;
    min-height: 60vh;
}

/* 文章详情页样式 */
.ku-post-container {
    max-width: 1000px;
    margin: 80px auto;
    padding: 0 24px;
}

.ku-back-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 30px;
    font-size: 16px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    font-weight: 500;
    gap: 8px;
    white-space: nowrap;
}

.ku-back-link:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: none;
}

.ku-back-link::before {
    content: '←';
    font-size: 14px;
}

/* 底部固定按钮区域 */
.ku-bottom-actions {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 20px;
    z-index: 1000;
}

.ku-post-detail {
    background: var(--surface);
    border-radius: var(--border-radius);
    padding: 48px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
}

.ku-post-detail h1 {
    font-size: 40px;
    color: var(--text-primary);
    margin-bottom: 24px;
    line-height: 1.2;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.ku-post-detail .ku-post-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 36px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border);
    border-top: none;
    padding-top: 0;
}

.ku-post-content {
    font-size: 17px;
    line-height: 1.8;
    color: var(--text-primary);
    font-weight: 400;
    position: relative;
    padding-top: 24px;
}

.ku-post-content p {
    margin-bottom: 24px;
}

.ku-post-content p:last-child {
    margin-bottom: 0;
}

/* 图片自适应内容框 */
.ku-post-content img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
}

/* 文章详情页容器布局 */
.ku-post-container {
    position: relative;
}

/* 顶部按钮区域布局 */
.ku-post-container > a.ku-back-link {
    display: inline-block;
    margin-right: 16px;
    margin-bottom: 32px;
}

.ku-post-container > .ku-share-section {
    display: inline-block;
    margin-bottom: 32px;
    position: absolute;
    right: 0;
    padding: 0 24px;
}

/* 分享按钮样式 */
.ku-share-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 30px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.ku-share-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.ku-share-btn:active {
    transform: translateY(-1px);
}

.ku-share-btn.copied {
    background: var(--success);
    transform: scale(0.95);
}

.ku-share-icon {
    font-size: 18px;
}

/* 复制成功提示框样式 */
.ku-copy-toast {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: 16px 32px;
    background: rgba(0, 0, 0, 0.9);
    color: white;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 500;
    z-index: 10000;
    white-space: nowrap;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.ku-copy-toast.show {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translate(-50%, -50%) scale(0.9); }
    to { opacity: 1; transform: translate(-50%, -50%) scale(1); }
}

/* 响应式设计 */
@media (max-width: 768px) {
    
    .ku-post-container {
        padding-bottom: 100px;
    }
    
    .ku-bottom-actions {
        bottom: 10px;
        gap: 12px;
    }
    
    .ku-back-link,
    .ku-share-btn {
        padding: 12px 20px;
        font-size: 14px;
        border-radius: 25px;
                width: 160px;
    }
    
    .ku-share-icon {
        font-size: 14px;
    }
    
    .ku-back-link::before {
        font-size: 12px;
    }
    
    .ku-copy-toast.show {
     
    }
}

/* 其他富文本元素样式 */
.ku-post-content iframe {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
}

.ku-post-content video {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
}

.ku-post-content table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 24px;
}

.ku-post-content th,
.ku-post-content td {
    padding: 8px 12px;
    border: 1px solid var(--border);
    text-align: left;
}

/* 容器样式 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 主内容区样式 */
main {
    padding: 40px 0;
    min-height: 60vh;
}

/* 卡片样式 */
.card {
    margin-top: 40px;
    background-color: #ffffff;
    border: 1px solid #e9ecef;
    border-radius: 8px;
    padding: 25px;
    margin-bottom: 25px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

/* 文章卡片样式 */
.post {
    background-color: #ffffff;
    border: 1px solid #e9ecef;
    border-radius: 8px;
    padding: 25px;
    margin-bottom: 25px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.post:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.post h2 {
    color: #007bff;
    font-size: 1.8rem;
    margin-bottom: 15px;
    font-weight: 600;
}

.post-meta {
    color: #6c757d;
    font-size: 0.9rem;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid #e9ecef;
}

.post-excerpt {
    color: #495057;
    margin-bottom: 20px;
    line-height: 1.7;
}

.post-content {
    color: #495057;
    line-height: 1.8;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
    text-align: center;
}

/* 联系我们按钮样式 */
.btn-contact {
    background: var(--primary-color);
    color: white;
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-size: 16px;
    margin-left: 8px;
}

.btn-contact:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(108, 99, 255, 0.3);
}

/* 联系我们弹窗样式 */
.contact-modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    /* animation: fadeIn 0.3s ease; */
}

.contact-modal-content {
    background-color: var(--surface);
    margin: 5% auto;
    padding: 30px;
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 500px;
    box-shadow: var(--shadow-xl);
    animation: slideInModal 0.3s ease;
}

.contact-modal-close {
    color: var(--text-secondary);
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    transition: var(--transition);
    line-height: 1;
    margin-top: -10px;
}

.contact-modal-close:hover {
    color: var(--error);
}

.contact-modal h2 {
    margin-bottom: 24px;
    color: var(--text-primary);
    font-size: 1.5rem;
}

/* 表单按钮样式 */
.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    margin-top: 24px;
}

.btn-submit {
    background: var(--primary-color);
    color: white;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-size: 1rem;
}

.btn-submit:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(108, 99, 255, 0.3);
}

.btn-cancel {
    background: var(--surface);
    color: var(--text-secondary);
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid var(--border);
    font-size: 1rem;
}

.btn-cancel:hover {
    background: var(--border);
    color: var(--text-primary);
    transform: translateY(-2px);
}

.btn-primary {
    background-color: #6c63ff;
    color: white;
}

.btn-primary:hover {
    background-color: #5a52e0;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(108, 99, 255, 0.3);
}

.btn-secondary {
    background-color: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background-color: #545b62;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(108, 117, 125, 0.3);
}

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

.btn-success:hover {
    background-color: #1e7e34;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(40, 167, 69, 0.3);
}

.btn-danger {
    background-color: #dc3545;
    color: white;
}

.btn-danger:hover {
    background-color: #c82333;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(220, 53, 69, 0.3);
}

/* 表单样式 */
.form-group {
    margin-bottom: 28px;
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--border);
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    transition: var(--transition);
    background-color: var(--surface);
    color: var(--text-primary);
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(108, 99, 255, 0.15);
}

.form-group small {
    display: block;
    margin-top: 8px;
    font-size: 0.875rem;
    color: var(--text-light);
    line-height: 1.5;
}

/* 设置页面专用样式 */
.banner-background-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 28px;
    margin-bottom: 28px;
    align-items: start;
}

.banner-background-options::before {
    content: "选择Banner背景样式：";
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    grid-column: 1 / -1;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--border);
}

.background-option {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    padding: 24px;
    transition: var(--transition);
}

.background-option:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.background-option label {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

/* 颜色选择器容器样式 */
.color-picker-container {
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
    padding: 24px;
    background: linear-gradient(135deg, rgba(255,255,255,0.8), rgba(248,250,252,0.8));
    border: 2px solid var(--border);
    border-radius: var(--border-radius);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

.color-picker-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, transparent, rgba(108,99,255,0.02), transparent);
    transform: translateX(-100%);
    transition: transform 0.6s ease;
}

.color-picker-container:hover::before {
    transform: translateX(100%);
}

.color-picker-container:hover {
    border-color: var(--primary-color);
    box-shadow: 0 6px 20px rgba(0,0,0,0.08);
    transform: translateY(-2px);
}

.color-picker-container input[type="color"] {
    width: 110px;
    height: 110px;
    border: 4px solid var(--surface);
    border-radius: 20px;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
    outline: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    flex-shrink: 0;
    z-index: 1;
}

.color-picker-container input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
    border-radius: 12px;
    overflow: hidden;
}

.color-picker-container input[type="color"]::-webkit-color-swatch {
    border: none;
    border-radius: 12px;
    box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.1);
}

.color-picker-container input[type="color"]::-moz-color-swatch {
    border: none;
    border-radius: 12px;
    box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.1);
}

.color-picker-container input[type="color"]:hover {
    transform: scale(1.1);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.color-picker-container input[type="color"]:active {
    transform: scale(1.05);
}

.color-picker-container input[type="text"] {
    flex: 1;
    min-width: 200px;
    padding: 16px 20px;
    border: 2px solid var(--border);
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-family: 'Courier New', monospace;
    background-color: var(--surface);
    color: var(--text-primary);
    transition: var(--transition);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.color-picker-container input[type="text"]:hover {
    border-color: var(--primary-color);
}

.color-picker-container input[type="text"]:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(108, 99, 255, 0.15), 0 2px 8px rgba(0, 0, 0, 0.05);
    outline: none;
    transform: translateY(-1px);
}

/* 文件上传容器样式 */
.file-upload-container {
    position: relative;
    margin-bottom: 24px;
    text-align: center;
    padding: 24px;
    background: linear-gradient(135deg, rgba(255,255,255,0.8), rgba(248,250,252,0.8));
    border: 2px dashed var(--border);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.file-upload-container:hover {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(255,255,255,0.9), rgba(248,250,252,0.9));
    box-shadow: 0 6px 20px rgba(0,0,0,0.08);
    transform: translateY(-2px);
}

.file-upload-container.dragover {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(108,99,255,0.05), rgba(108,99,255,0.02));
    transform: scale(1.02);
}

.file-upload-container input[type="file"] {
    display: none;
}

.file-upload-label {
    display: inline-block;
    padding: 18px 36px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 700;
    transition: var(--transition);
    text-align: center;
    border: 2px solid transparent;
    box-shadow: 0 6px 16px rgba(108, 99, 255, 0.4);
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.file-upload-label::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255,255,255,0.1), rgba(255,255,255,0.05));
    transform: translateX(-100%);
    transition: transform 0.6s ease;
    z-index: -1;
}

.file-upload-label:hover::before {
    transform: translateX(100%);
}

.file-upload-label:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--secondary-color));
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(108, 99, 255, 0.4);
}

.file-upload-label:active {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(108, 99, 255, 0.3);
}

.file-upload-container::after {
    content: '支持 JPEG、PNG、GIF、WebP 格式，最大 2MB';
    display: block;
    margin-top: 12px;
    font-size: 0.875rem;
    color: var(--text-light);
    font-weight: 500;
}

/* 图片预览区域样式 */
.image-preview {
    position: relative;
    margin-top: 16px;
    border-radius: var(--border-radius-sm);
    overflow: hidden;
    background-color: var(--background);
    border: 2px dashed var(--border);
    min-height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.image-preview img {
    max-width: 100%;
    max-height: 200px;
    object-fit: cover;
    border-radius: var(--border-radius-sm);
}

.image-preview.has-image {
    border-style: solid;
    border-color: var(--primary-color);
}

.remove-image {
    position: absolute;
    top: 12px;
    right: 12px;
    background: var(--error);
    color: white;
    border: none;
    border-radius: 34px;
    width: 58px;
    height: 32px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    display: flex
;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
    z-index: 10;
}

.remove-image:hover {
    background: #dc2626;
    transform: scale(1.1);
    box-shadow: 0 6px 16px rgba(239, 68, 68, 0.4);
}

/* 表单操作区域样式 */
.form-actions {
    display: flex;
    justify-content: flex-start;
    gap: 16px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
    margin-top: 32px;
}

/* 优化卡片样式 */
.card {
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    padding: 40px;
    margin-bottom: 25px;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.card h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 32px;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--border);
}

/* 现代化选择框样式 */
.form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 12px center;
    background-repeat: no-repeat;
    background-size: 16px;
    padding-right: 40px;
    cursor: pointer;
}

.form-group select:hover {
    border-color: var(--primary-color);
}

.form-group select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(108, 99, 255, 0.1);
}

/* KU主题选择框样式 */
.ku-form-group select {
    background-color: var(--surface);
    border: 2px solid var(--border);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-weight: 500;
    transition: var(--transition);
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236c63ff' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 16px center;
    background-repeat: no-repeat;
    background-size: 20px;
    padding: 14px 48px 14px 16px;
}

.ku-form-group select:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.ku-form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(108, 99, 255, 0.15);
}

.ku-form-group select option {
    background-color: var(--surface);
    color: var(--text-primary);
    padding: 8px;
}

/* 链接样式 */
.read-more {
    background-color: #007bff;
    color: white;
    padding: 10px 20px;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 500;
    transition: background-color 0.3s ease;
}

.read-more:hover {
    background-color: #0056b3;
}

.back-link {
    background-color: #6c757d;
    color: white;
    padding: 10px 20px;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 500;
    transition: background-color 0.3s ease;
    margin-bottom: 20px;
    display: inline-block;
}

.back-link:hover {
    background-color: #545b62;
}

/* 页脚样式 */
footer {
    background-color: #ffffff;
    color: #6c757d;
    padding: 30px 0;
    text-align: center;
    border-top: 1px solid #e9ecef;
    margin-top: 50px;
}

/* 登录页面样式 */
.login-container {
    max-width: 450px;
    margin: 80px auto;
    background-color: white;
    padding: 40px;
    border-radius: 8px;
    border: 1px solid #e9ecef;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.login-container h1 {
    color: #6c63ff;
    text-align: center;
    margin-bottom: 30px;
    font-size: 2rem;
    font-weight: 600;
}

.error {
    color: #dc3545;
    background-color: #f8d7da;
    border: 1px solid #f5c6cb;
    border-radius: 6px;
    padding: 12px;
    margin-bottom: 20px;
    text-align: center;
}

/* 修正登录页面表单样式 */
.login-container .form-group {
    margin-bottom: 20px;
}

.login-container .form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #495057;
}

.login-container .form-group input {
    width: 100%;
    padding: 12px;
    border: 1px solid #ced4da;
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.login-container .form-group input:focus {
    outline: none;
    border-color: #6c63ff;
    box-shadow: 0 0 0 2px rgba(108, 99, 255, 0.25);
}

.login-container input[type="submit"] {
    width: 100%;
    padding: 12px;
    background-color: #6c63ff;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.login-container input[type="submit"]:hover {
    background-color: #5a52e0;
}

/* 后台管理样式 */
.admin-header {
    background-color: #6c63ff;
    color: white;
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 8px rgba(108, 99, 255, 0.2);
}

.admin-header h1 {
    margin: 0;
    font-size: 1.8rem;
    font-weight: 600;
}

.admin-header nav {
    background-color: transparent;
    border-bottom: none;
    padding: 0;
}

.admin-header nav a {
    color: white;
    padding: 8px 15px;
    transition: background-color 0.3s ease;
}

.admin-header nav a:hover {
    background-color: rgba(255,255,255,0.1);
    border-radius: 4px;
}

/* 后台管理样式 */
.admin-header {
    background-color: #6c63ff;
    color: white;
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 8px rgba(108, 99, 255, 0.2);
}

.admin-header h1 {
    margin: 0;
    font-size: 1.8rem;
    font-weight: 600;
}

.admin-header nav {
    background-color: transparent;
    border-bottom: none;
    padding: 0;
}

.admin-header nav a {
    color: white;
    padding: 8px 15px;
    transition: background-color 0.3s ease;
}

.admin-header nav a:hover {
    background-color: rgba(255,255,255,0.1);
    border-radius: 4px;
}

.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background-color: #ffffff;
    border: 1px solid #e9ecef;
    border-radius: 8px;
    padding: 25px;
    text-align: center;
}

.stat-card h3 {
    color: #6c757d;
    font-size: 1rem;
    margin-bottom: 10px;
}

.stat-card .stat-number {
    color: #007bff;
    font-size: 2.5rem;
    font-weight: 700;
}

/* 表格样式 */
.posts-table {
    width: 100%;
    max-width: 100%;
    border-collapse: collapse;
    background-color: #ffffff;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    margin: 20px 0;
}

.posts-table th,
.posts-table td {
    padding: 15px 12px;
    text-align: left;
    border-bottom: 1px solid #e9ecef;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    position: relative;
}

.posts-table th {
    background-color: #f8f9fa;
    font-weight: 600;
    color: #495057;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* 列宽设置 */
.posts-table td:nth-child(1),
.posts-table th:nth-child(1) {
    width: 50px;
    max-width: 50px;
    text-align: center;
}

.posts-table td:nth-child(2),
.posts-table th:nth-child(2) {
    width: 60px;
    max-width: 60px;
    text-align: center;
}

.posts-table td:nth-child(3),
.posts-table th:nth-child(3) {
    max-width: 250px;
}

.posts-table td:nth-child(4),
.posts-table th:nth-child(4) {
    width: 100px;
    max-width: 100px;
}

.posts-table td:nth-child(5),
.posts-table th:nth-child(5) {
    width: 80px;
    max-width: 80px;
}

.posts-table td:nth-child(6),
.posts-table th:nth-child(6) {
    width: 150px;
    max-width: 150px;
}

.posts-table td:nth-child(7),
.posts-table th:nth-child(7) {
    width: 150px;
    max-width: 150px;
}

.posts-table td:nth-child(8),
.posts-table th:nth-child(8) {
    width: 160px;
    max-width: 160px;
    text-align: center;
    white-space: normal;
}

.posts-table td:nth-child(8):hover::after {
    display: none;
}

.posts-table td[data-overflow="true"] {
    cursor: pointer;
}

.posts-table td[data-overflow="true"]:hover {
    background-color: #f0f0ff;
}

/* 溢出提示框 */
.table-tooltip {
    position: fixed;
    max-width: 300px;
    padding: 12px 16px;
    background: rgba(40, 40, 50, 0.95);
    color: #fff;
    font-size: 13px;
    font-weight: 400;
    line-height: 1.5;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
    z-index: 9999;
    white-space: pre-wrap;
    word-break: break-word;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.table-tooltip.show {
    opacity: 1;
}

.posts-table tr:last-child td {
    border-bottom: none;
}

.posts-table tr:hover {
    background-color: #f8f9ff;
    transition: background-color 0.3s ease;
}

/* 操作链接样式 */
.action-links {
    display: flex;
    gap: 10px;
}

.action-links .btn {
    padding: 6px 12px;
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: 4px;
    transition: all 0.3s ease;
}

/* 消息提示样式 */
.message {
    padding: 12px 20px;
    border-radius: 6px;
    margin-bottom: 20px;
    font-weight: 500;
    text-align: center;
}

.message.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.message.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* 响应式设计 */
@media (max-width: 768px) {
    /* 基础响应式样式 */
    header h1 {
        font-size: 2rem;
    }
    
    .post h2 {
        font-size: 1.5rem;
    }
    
    nav ul {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
    
    .login-container {
    
    }
    
    .dashboard-stats {
        grid-template-columns: 1fr;
    }
    
    /* KU主题响应式样式 - 平板设备 */
    .ku-header-content {
        padding: 15px 20px;
        flex-direction: row;
        align-items: center;
        gap: 15px;
    }
    
    .ku-logo {
        font-size: 24px;
    }
    
    .ku-nav {
        display: flex;
        align-items: center;
        gap: 16px;
    }
    
    .ku-nav a {
        font-size: 14px;
        padding: 6px 8px;
    }
    
    .ku-nav a:hover {
        padding: 6px 12px;
    }
    
    .ku-user-section {
        display: none;
    }
    
    .ku-nav-toggle {
        display: block;
    }
}

/* 小型移动设备 (最大宽度 480px) */
@media screen and (max-width: 480px) {
    .ku-header-content {
        padding: 12px 15px;
        gap: 10px;
    }
    
    .ku-logo {
        font-size: 20px;
        gap: 6px;
    }
    
    .ku-logo::before {
        font-size: 16px;
    }
    
    .ku-nav {
        gap: 12px;
    }
    
    .ku-nav a {
        font-size: 13px;
        padding: 5px 6px;
    }
    
    .ku-nav a:hover {
        padding: 5px 10px;
    }
    
    .ku-mobile-menu {
        width: 260px;
    }
    
    .ku-banner {
        padding: 30px 15px;
    }
    
    .ku-banner h1 {
        font-size: 28px;
    }
    
    .ku-banner p {
        font-size: 14px;
    }
    
    .ku-posts-grid {
        grid-template-columns: 1fr;
        gap: 15px;
        padding: 0 15px;
    }
}

/* 平板设备 (最大宽度 768px) */
@media (max-width: 768px) {
    .ku-banner {
        padding: 40px 20px;
    }
    
    .ku-banner h1 {
        font-size: 36px;
    }
    
    .ku-banner p {
        font-size: 16px;
    }
    
    .ku-tags {
        flex-direction: row;
        overflow-x: auto;
        justify-content: center;
        padding: 0 20px;
        gap: 8px;
        width: 100%;
    }
    
    .ku-tags::-webkit-scrollbar {
        height: 4px;
    }
    
    .ku-tags::-webkit-scrollbar-thumb {
        background-color: #6c63ff;
        border-radius: 2px;
    }
    
    /* 响应式网格布局 - 平板设备 */
    .ku-posts-grid {
        
        gap: 20px;
        padding: 0 20px;
    }
    
    .ku-load-more {
        margin: 40px auto;
        padding: 10px 25px;
        font-size: 14px;
    }
    
    /* 文章详情页响应式样式 */
    .ku-post-container {
        margin: 40px auto;
        padding: 0 20px;
    }
    
    .ku-post-detail {
        padding: 20px;
    }
    
    .ku-post-detail h1 {
        font-size: 28px;
    }
    
    .ku-post-detail .ku-post-meta {
        flex-direction: column;
        gap: 10px;
        font-size: 13px;
    }
    
    .ku-post-content {
        font-size: 15px;
        line-height: 1.8;
    }
    
    .ku-back-link {
        /* margin-bottom: 20px; */
        padding: 6px 14px;
        /* font-size: 13px; */
    }
}