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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    color: #e0e6ed;
    min-height: 100vh;
    line-height: 1.6;
}

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

/* 头部样式 */
.header {
    text-align: center;
    margin-bottom: 40px;
    padding: 30px 0;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.site-title {
    font-size: 2.5rem;
    margin-bottom: 20px;
    background: linear-gradient(45deg, #64b5f6, #42a5f5, #2196f3);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 30px rgba(33, 150, 243, 0.5);
}

.site-title i {
    margin-right: 15px;
    color: #64b5f6;
}

.nav {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.nav-btn {
    padding: 12px 24px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 25px;
    color: #e0e6ed;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-btn:hover {
    background: rgba(100, 181, 246, 0.2);
    border-color: #64b5f6;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(100, 181, 246, 0.3);
}

.nav-btn.active {
    background: linear-gradient(45deg, #64b5f6, #42a5f5);
    border-color: #2196f3;
    color: white;
    box-shadow: 0 5px 15px rgba(100, 181, 246, 0.4);
}

/* 主要内容区域 */
.main {
    position: relative;
}

.section {
    display: none;
    animation: fadeIn 0.5s ease-in-out;
}

.section.active {
    display: block;
}

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

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding: 20px 0;
    border-bottom: 2px solid rgba(100, 181, 246, 0.3);
}

.section-header h2 {
    font-size: 2rem;
    color: #64b5f6;
}

.edit-btn, .add-btn {
    padding: 10px 20px;
    background: linear-gradient(45deg, #4caf50, #45a049);
    border: none;
    border-radius: 20px;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
}

.edit-btn:hover, .add-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(76, 175, 80, 0.4);
}

/* 内容区域 */
.content-area {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    padding: 30px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.markdown-content {
    line-height: 1.8;
}

.markdown-content h1, .markdown-content h2, .markdown-content h3 {
    color: #64b5f6;
    margin: 20px 0 10px 0;
}

.markdown-content p {
    margin-bottom: 15px;
}

.markdown-content ul, .markdown-content ol {
    margin-left: 20px;
    margin-bottom: 15px;
}

.markdown-content code {
    background: rgba(255, 255, 255, 0.1);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
}

.markdown-content pre {
    background: rgba(0, 0, 0, 0.3);
    padding: 15px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 15px 0;
}

.markdown-content img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 10px 0;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.markdown-content blockquote {
    border-left: 4px solid #64b5f6;
    padding-left: 15px;
    margin: 15px 0;
    font-style: italic;
    color: #b0bec5;
}

/* 帖子样式 */
.posts-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 25px;
    margin-top: 20px;
}

.post-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    padding: 25px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.post-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(100, 181, 246, 0.2);
    border-color: rgba(100, 181, 246, 0.3);
}

.post-header {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
    gap: 12px;
}

.author-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid #64b5f6;
}

.post-author {
    font-weight: bold;
    color: #64b5f6;
    font-size: 1.1rem;
}

.post-date {
    color: #90a4ae;
    font-size: 0.9rem;
    margin-left: auto;
}

.post-title {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: #e0e6ed;
    font-weight: 600;
}

.post-preview {
    color: #b0bec5;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.read-more {
    color: #64b5f6;
    font-size: 0.9rem;
    margin-top: 10px;
    display: flex;
    align-items: center;
    gap: 5px;
}

/* 模态框样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    animation: modalFadeIn 0.3s ease;
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.modal-content {
    background: linear-gradient(135deg, #1e1e2e 0%, #2a2a3e 100%);
    margin: 20px;
    padding: 0;
    border-radius: 20px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.1);
    animation: modalSlideIn 0.3s ease;
}

.modal-content.large {
    max-width: 800px;
}

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

.modal-header {
    padding: 25px 30px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(100, 181, 246, 0.1);
}

.modal-header h3 {
    color: #64b5f6;
    font-size: 1.5rem;
}

.post-actions {
    display: flex;
    gap: 10px;
    align-items: center;
}

.close-btn {
    background: none;
    border: none;
    color: #e0e6ed;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 5px;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.close-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #ff5252;
}

.modal-body {
    padding: 30px;
}

.modal-footer {
    padding: 20px 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: flex-end;
    gap: 15px;
    background: rgba(0, 0, 0, 0.1);
}

/* 表单样式 */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #64b5f6;
    font-weight: 500;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 12px 15px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    color: #e0e6ed;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: #64b5f6;
    box-shadow: 0 0 0 3px rgba(100, 181, 246, 0.2);
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
    font-family: inherit;
}

/* 按钮样式 */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(45deg, #64b5f6, #42a5f5);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(100, 181, 246, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: #e0e6ed;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
}

.btn-danger {
    background: linear-gradient(45deg, #f44336, #d32f2f);
    color: white;
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(244, 67, 54, 0.4);
}

.btn-small {
    padding: 6px 12px;
    font-size: 0.8rem;
}

/* 头像预览 */
.avatar-preview {
    margin-top: 10px;
}

.avatar-preview img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid #64b5f6;
}

/* 图片上传 */
.image-upload {
    margin-top: 15px;
    padding: 15px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    border: 1px dashed rgba(100, 181, 246, 0.3);
}

.image-upload label {
    color: #64b5f6;
    font-weight: 500;
}

.image-upload input[type="file"] {
    margin-top: 8px;
    padding: 8px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    color: #e0e6ed;
}

/* 帖子元信息 */
.post-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.post-author-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.post-author-info span {
    font-weight: bold;
    color: #64b5f6;
    font-size: 1.1rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .site-title {
        font-size: 2rem;
    }
    
    .nav {
        flex-direction: column;
        gap: 10px;
    }
    
    .section-header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .posts-container {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        margin: 10px;
        width: calc(100% - 20px);
    }
    
    .modal-header {
        padding: 20px;
    }
    
    .modal-body {
        padding: 20px;
    }
    
    .post-actions {
        flex-wrap: wrap;
    }
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: rgba(100, 181, 246, 0.5);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(100, 181, 246, 0.7);
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(100, 181, 246, 0.3);
    border-radius: 50%;
    border-top-color: #64b5f6;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}