/* 个人博客前端样式 */

/* 全局样式 */
:root {
    --primary-color: #4e73df;
    --primary-dark: #2653d4;
    --secondary-color: #858796;
    --success-color: #1cc88a;
    --danger-color: #e74a3b;
    --warning-color: #f6c23e;
    --info-color: #36b9cc;
    --light-color: #f8f9fc;
    --dark-color: #5a5c69;
    --font-family: 'Nunito', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    --border-radius: 0.35rem;
    --box-shadow: 0 0.15rem 1.75rem 0 rgba(58, 59, 69, 0.15);
    --transition: all 0.3s ease;

    /* 现代化设计变量 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.15);
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --duration-fast: 150ms;
    --duration-normal: 300ms;
    --duration-slow: 500ms;
    --ease-out: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
}

/* 导航栏样式 */
.navbar {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%) !important;
    box-shadow: var(--box-shadow);
    padding: 1rem 0;
    backdrop-filter: blur(10px);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: var(--transition);
}

.navbar-brand:hover {
    transform: scale(1.05);
}

.navbar-nav .nav-link {
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    margin: 0 0.5rem;
    border-radius: var(--border-radius);
    padding: 0.5rem 1rem !important;
}

.navbar-nav .nav-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.navbar-nav .nav-link.active {
    background-color: rgba(255, 255, 255, 0.2);
    font-weight: 600;
}

.navbar-nav .nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 50%;
    background-color: #fff;
    transition: var(--transition);
}

.navbar-nav .nav-link:hover::after,
.navbar-nav .nav-link.active::after {
    width: 80%;
    left: 10%;
}

/* 主要内容区域 */
.main-content {
    min-height: calc(100vh - 200px);
    padding: 2rem 0;
    position: relative;
}

.main-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(180deg, rgba(78, 115, 223, 0.1) 0%, transparent 100%);
    pointer-events: none;
}

/* 容器样式 */
.container {
    position: relative;
    z-index: 1;
}

/* 卡片样式 */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    overflow: hidden;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 0.5rem 2rem 0 rgba(58, 59, 69, 0.2);
}

.card-header {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border-radius: var(--border-radius) var(--border-radius) 0 0 !important;
    font-weight: 600;
    padding: 1.25rem;
    border-bottom: none;
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    background-color: var(--light-color);
    border-top: 1px solid #e3e6f0;
    padding: 1rem 1.5rem;
}

/* 文章样式 */
.post-content {
    font-size: 1.1rem;
    line-height: 1.8;
}

.post-content h1,
.post-content h2,
.post-content h3,
.post-content h4,
.post-content h5,
.post-content h6 {
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: var(--dark-color);
}

.post-content p {
    margin-bottom: 1.5rem;
}

.post-content blockquote {
    border-left: 4px solid var(--primary-color);
    padding-left: 1rem;
    margin: 1.5rem 0;
    font-style: italic;
    background-color: var(--light-color);
    padding: 1rem;
    border-radius: 0 5px 5px 0;
}

.post-content code {
    background-color: #f8f9fa;
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-size: 0.9rem;
}

.post-content pre {
    background-color: #f8f9fa;
    padding: 1rem;
    border-radius: 5px;
    overflow-x: auto;
}

/* 按钮样式 */
.btn {
    border-radius: var(--border-radius);
    font-weight: 500;
    padding: 0.75rem 1.5rem;
    transition: var(--transition);
    border: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color), #17a673);
    color: white;
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger-color), #e02d1b);
    color: white;
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning-color), #f4b619);
    color: #212529;
}

.btn-info {
    background: linear-gradient(135deg, var(--info-color), #2c9faf);
    color: white;
}

.btn-outline-primary {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    background: transparent;
}

.btn-outline-primary:hover {
    background: var(--primary-color);
    color: white;
}

/* 表单样式 */
.form-control {
    border-radius: 8px;
    border: 2px solid #e9ecef;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

.input-group-text {
    border-radius: 8px 0 0 8px;
    border: 2px solid #e9ecef;
    border-right: none;
    background-color: var(--light-color);
}

/* 分页样式 */
.pagination .page-link {
    border-radius: 8px;
    margin: 0 2px;
    border: none;
    color: var(--primary-color);
    transition: all 0.3s ease;
}

.pagination .page-link:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-1px);
}

.pagination .page-item.active .page-link {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

/* 徽章样式 */
.badge {
    border-radius: 12px;
    font-weight: 500;
}

/* 评论样式 */
.comment {
    border-left: 3px solid var(--primary-color);
    padding-left: 1rem;
}

.comments-list .comment:nth-child(even) {
    background-color: #f8f9fa;
    padding: 1rem;
    border-radius: 8px;
    border-left: 3px solid var(--secondary-color);
}

/* 侧边栏样式 */
.sidebar .card {
    border: 1px solid #e9ecef;
}

.sidebar .card-header {
    background: var(--light-color);
    color: var(--dark-color);
    border-bottom: 1px solid #e9ecef;
}

/* 页脚样式 */
footer {
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    color: var(--gray-700) !important;
}

footer .social-links a {
    transition: color 0.3s ease, transform 0.3s ease;
    color: var(--gray-600) !important;
}

footer .social-links a:hover {
    color: var(--primary-color) !important;
    transform: translateY(-2px);
}

/* 返回顶部按钮 */
#backToTop {
    border-radius: 50%;
    width: 50px;
    height: 50px;
    transition: all 0.3s ease;
}

#backToTop:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 123, 255, 0.4);
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .main-content {
        padding-top: 10px;
    }
    
    .card {
        margin-bottom: 1rem;
    }
    
    .btn {
        padding: 0.4rem 1rem;
        font-size: 0.9rem;
    }
    
    .post-content {
        font-size: 1rem;
    }
    
    .navbar-brand {
        font-size: 1.2rem;
    }
}

@media (max-width: 576px) {
    .container {
        padding-left: 10px;
        padding-right: 10px;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .btn-group .btn {
        padding: 0.3rem 0.8rem;
        font-size: 0.8rem;
    }
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #0056b3;
}

/* 动画效果 */
.fade-in {
    animation: fadeIn 0.8s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.slide-in-left {
    animation: slideInLeft 0.6s ease-out;
}

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

.slide-in-right {
    animation: slideInRight 0.6s ease-out;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.bounce-in {
    animation: bounceIn 0.8s ease-out;
}

@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.3);
    }
    50% {
        opacity: 1;
        transform: scale(1.05);
    }
    70% {
        transform: scale(0.9);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

.zoom-in {
    animation: zoomIn 0.5s ease-out;
}

@keyframes zoomIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* 悬停特效 */
.hover-lift {
    transition: var(--transition);
}

.hover-lift:hover {
    transform: translateY(-5px);
    box-shadow: 0 0.5rem 2rem rgba(0, 0, 0, 0.1);
}

.hover-glow {
    transition: var(--transition);
}

.hover-glow:hover {
    box-shadow: 0 0 20px rgba(78, 115, 223, 0.3);
}

/* 脉冲动画 */
.pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(78, 115, 223, 0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(78, 115, 223, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(78, 115, 223, 0);
    }
}

/* 打字机效果 */
.typewriter {
    overflow: hidden;
    border-right: 0.15em solid var(--primary-color);
    white-space: nowrap;
    margin: 0 auto;
    letter-spacing: 0.15em;
    animation: typing 3.5s steps(40, end), blink-caret 0.75s step-end infinite;
}

@keyframes typing {
    from { width: 0; }
    to { width: 100%; }
}

@keyframes blink-caret {
    from, to { border-color: transparent; }
    50% { border-color: var(--primary-color); }
}

/* 特殊效果 */
.text-gradient {
    background: linear-gradient(135deg, var(--primary-color), #0056b3);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.shadow-custom {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.border-gradient {
    border: 2px solid;
    border-image: linear-gradient(135deg, var(--primary-color), #0056b3) 1;
}

/* 文章列表样式 */
.post-card {
    position: relative;
    overflow: hidden;
}

.post-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--info-color));
    transform: scaleY(0);
    transition: var(--transition);
}

.post-card:hover::before {
    transform: scaleY(1);
}

.post-meta {
    font-size: 0.875rem;
    color: var(--secondary-color);
}

.post-meta .badge {
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
}

.post-excerpt {
    color: #666;
    line-height: 1.6;
}

/* 搜索框美化 */
.navbar .form-control {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    border-radius: 25px;
    padding: 0.5rem 1rem;
}

.navbar .form-control::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.navbar .form-control:focus {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.4);
    box-shadow: 0 0 0 0.2rem rgba(255, 255, 255, 0.25);
    color: white;
}

.navbar .btn-outline-light {
    border-radius: 25px;
    border: 1px solid rgba(255, 255, 255, 0.5);
}

/* 侧边栏美化 */
.sidebar .card {
    border: none;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
}

.sidebar .card-header {
    background: linear-gradient(135deg, var(--primary-color), var(--info-color));
    color: white;
    font-weight: 600;
    text-align: center;
}

.sidebar .list-group-item {
    border: none;
    background: transparent;
    padding: 0.75rem 1rem;
    transition: var(--transition);
}

.sidebar .list-group-item:hover {
    background: rgba(78, 115, 223, 0.1);
    transform: translateX(5px);
}

/* 标签云样式 */
.tag-cloud .badge {
    margin: 0.25rem;
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
    transition: var(--transition);
    cursor: pointer;
}

.tag-cloud .badge:hover {
    transform: scale(1.1);
    box-shadow: 0 0.25rem 0.5rem rgba(0, 0, 0, 0.1);
}

/* 页脚美化 */
footer {
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    margin-top: 3rem;
    position: relative;
    overflow: hidden;
    color: var(--gray-700) !important;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
}

footer .social-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.1);
    color: var(--gray-600) !important;
    margin: 0 0.5rem;
    transition: var(--transition);
}

footer .social-links a:hover {
    background: var(--primary-color);
    color: white !important;
    transform: translateY(-3px) scale(1.1);
}

/* 页脚文字颜色 */
footer h5, footer h6 {
    color: var(--gray-800) !important;
}

footer p {
    color: var(--gray-600) !important;
}

footer .text-muted {
    color: var(--gray-500) !important;
}

footer a {
    color: var(--gray-600) !important;
    transition: color 0.3s ease;
}

footer a:hover {
    color: var(--primary-color) !important;
}

/* 页脚分隔线 */
footer hr {
    border-color: rgba(0, 0, 0, 0.1) !important;
    opacity: 0.3;
}

/* 确保毛玻璃效果的浏览器兼容性 */
.modern-navbar,
footer {
    /* 为不支持backdrop-filter的浏览器提供备用方案 */
    background: rgba(255, 255, 255, 0.95) !important;
}

/* 支持backdrop-filter的浏览器 */
@supports (backdrop-filter: blur(20px)) {
    .modern-navbar,
    footer {
        background: rgba(255, 255, 255, 0.85) !important;
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
    }
}

/* 新的卡片式布局样式 */
.hover-lift {
    transition: all 0.3s ease;
}

.hover-lift:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15) !important;
}

.featured-post .card {
    transition: all 0.3s ease;
}

.featured-post .card:hover {
    transform: translateY(-3px);
}

/* 侧边栏卡片样式 */
.card {
    transition: all 0.3s ease;
    border: none !important;
}

.card:hover {
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1) !important;
}

/* 标签样式 */
.badge {
    font-weight: 500;
    padding: 0.5em 0.75em;
}

.badge.bg-light {
    color: #495057 !important;
    background-color: #f8f9fa !important;
    border: 1px solid #dee2e6;
}

.badge.bg-light:hover {
    background-color: #e9ecef !important;
    transform: translateY(-1px);
    transition: all 0.2s ease;
}

/* 顶部横幅样式 */
.hero-banner {
    margin-top: -20px; /* 紧贴导航栏 */
}

.hero-banner img {
    transition: transform 0.3s ease;
}

.hero-banner:hover img {
    transform: scale(1.02);
}

/* 分类导航栏样式 */
.category-nav {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 50px;
    padding: 10px 0;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.category-nav .nav-pills .nav-link {
    color: #6c757d;
    background: transparent;
    border-radius: 25px;
    padding: 8px 16px;
    margin: 0 4px;
    transition: all 0.3s ease;
    font-size: 14px;
    font-weight: 500;
}

.category-nav .nav-pills .nav-link:hover {
    color: #495057;
    background: rgba(102, 126, 234, 0.1);
    transform: translateY(-2px);
}

.category-nav .nav-pills .nav-link.active {
    color: white;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

/* 文章卡片优化 */
.card {
    transition: all 0.3s ease;
    border: none !important;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15) !important;
}

.card-title a {
    color: #2c3e50 !important;
    font-weight: 600;
}

.card-title a:hover {
    color: #667eea !important;
}

/* 空状态样式 */
.empty-state {
    padding: 60px 20px;
}

.empty-state i {
    opacity: 0.6;
    margin-bottom: 20px;
}

.empty-state .feature-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.empty-state .feature-icon:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

/* 标签云优化 */
.badge {
    transition: all 0.3s ease;
}

.badge:hover {
    transform: translateY(-2px);
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
}

/* 分页样式优化 */
.pagination {
    gap: 5px;
}

.pagination .page-link {
    border: none;
    border-radius: 8px;
    padding: 8px 12px;
    color: #6c757d;
    background: #f8f9fa;
    transition: all 0.3s ease;
    font-weight: 500;
}

.pagination .page-link:hover {
    background: #667eea;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.pagination .page-item.active .page-link {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

/* 现代化页脚样式 */
.modern-footer {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    color: #ecf0f1;
}

.footer-main {
    padding: 60px 0 40px;
}

.footer-bottom {
    background: rgba(0, 0, 0, 0.2);
    padding: 20px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand h5 {
    font-weight: 600;
    margin-bottom: 15px;
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li {
    margin-bottom: 8px;
}

.footer-links a {
    color: #bdc3c7;
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 14px;
}

.footer-links a:hover {
    color: #3498db;
    padding-left: 5px;
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    color: #ecf0f1;
    border-radius: 50%;
    text-decoration: none;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.social-link:hover {
    background: #3498db;
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(52, 152, 219, 0.4);
}

.contact-info {
    margin-top: 10px;
}

.contact-item {
    display: flex;
    align-items: center;
    margin-bottom: 12px;
    color: #bdc3c7;
    font-size: 14px;
}

.contact-item i {
    color: #3498db;
    width: 20px;
}

.footer-bottom p {
    color: #95a5a6;
    font-size: 14px;
}

.footer-bottom .text-primary {
    color: #3498db !important;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .hero-banner {
        height: 300px !important;
    }

    .hero-banner .display-5 {
        font-size: 1.8rem !important;
    }

    .category-nav .nav {
        flex-wrap: wrap;
        justify-content: center;
    }

    .category-nav .nav-link {
        margin: 2px;
        font-size: 12px;
        padding: 6px 12px;
    }

    .container {
        padding-left: 15px !important;
        padding-right: 15px !important;
    }

    .footer-main {
        padding: 40px 0 30px;
    }

    .social-links {
        justify-content: center;
        margin-top: 15px;
    }

    .footer-bottom {
        text-align: center;
    }

    .footer-bottom .col-md-6 {
        text-align: center !important;
        margin-bottom: 10px;
    }
}

/* 加载动画增强 */
.loading-spinner {
    display: inline-block;
    width: 2rem;
    height: 2rem;
    border: 0.25em solid rgba(78, 115, 223, 0.2);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s linear infinite;
}

/* 返回顶部按钮美化 */
#backToTop {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--info-color));
    color: white;
    border: none;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
}

#backToTop.show {
    opacity: 1;
    visibility: visible;
}

#backToTop:hover {
    transform: translateY(-5px) scale(1.1);
    box-shadow: 0 0.5rem 2rem rgba(78, 115, 223, 0.4);
}

/* 文章详情页美化 */
.post-header {
    background: linear-gradient(135deg, rgba(78, 115, 223, 0.1), rgba(54, 185, 204, 0.1));
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-bottom: 2rem;
    position: relative;
    overflow: hidden;
}

.post-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--info-color));
}

.post-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 1rem;
    line-height: 1.2;
}

.post-meta-enhanced {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: center;
    color: var(--secondary-color);
    font-size: 0.9rem;
}

.post-meta-enhanced .meta-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.25rem 0.75rem;
    background: rgba(255, 255, 255, 0.7);
    border-radius: 20px;
    transition: var(--transition);
}

.post-meta-enhanced .meta-item:hover {
    background: rgba(78, 115, 223, 0.1);
    transform: translateY(-1px);
}

.post-content-enhanced {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #444;
}

.post-content-enhanced h1,
.post-content-enhanced h2,
.post-content-enhanced h3,
.post-content-enhanced h4,
.post-content-enhanced h5,
.post-content-enhanced h6 {
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    color: var(--dark-color);
    position: relative;
}

.post-content-enhanced h2::before {
    content: '';
    position: absolute;
    left: -1rem;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--info-color));
    border-radius: 2px;
}

.post-content-enhanced blockquote {
    border-left: 4px solid var(--primary-color);
    padding: 1.5rem;
    margin: 2rem 0;
    background: linear-gradient(135deg, rgba(78, 115, 223, 0.05), rgba(54, 185, 204, 0.05));
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    font-style: italic;
    position: relative;
}

.post-content-enhanced blockquote::before {
    content: '"';
    position: absolute;
    top: -10px;
    left: 10px;
    font-size: 3rem;
    color: var(--primary-color);
    opacity: 0.3;
}

.post-content-enhanced code {
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.9rem;
    color: #e83e8c;
    border: 1px solid #dee2e6;
}

.post-content-enhanced pre {
    background: linear-gradient(135deg, #2d3748, #4a5568);
    color: #e2e8f0;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    overflow-x: auto;
    position: relative;
    box-shadow: var(--box-shadow);
}

.post-content-enhanced pre::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #ff6b6b, #4ecdc4, #45b7d1);
}

/* 评论区美化 */
.comments-section {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-top: 3rem;
    box-shadow: var(--box-shadow);
}

.comment-item {
    padding: 1.5rem;
    border-left: 3px solid var(--primary-color);
    background: rgba(78, 115, 223, 0.02);
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    margin-bottom: 1.5rem;
    transition: var(--transition);
}

.comment-item:hover {
    background: rgba(78, 115, 223, 0.05);
    transform: translateX(5px);
}

.comment-author {
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.comment-content {
    color: #555;
    line-height: 1.6;
}

.comment-meta {
    font-size: 0.875rem;
    color: var(--secondary-color);
    margin-top: 0.5rem;
}

/* 标签样式增强 */
.tag-item {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    margin: 0.25rem;
    background: linear-gradient(135deg, var(--primary-color), var(--info-color));
    color: white;
    text-decoration: none;
    border-radius: 20px;
    font-size: 0.875rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.tag-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.tag-item:hover::before {
    left: 100%;
}

.tag-item:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 0.25rem 0.5rem rgba(0, 0, 0, 0.1);
    color: white;
    text-decoration: none;
}

/* 分页美化 */
.pagination-wrapper {
    display: flex;
    justify-content: center;
    margin: 3rem 0;
}

.pagination .page-link {
    border: none;
    margin: 0 0.25rem;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    background: rgba(255, 255, 255, 0.8);
    transition: var(--transition);
}

.pagination .page-link:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px) scale(1.1);
    box-shadow: 0 0.25rem 0.5rem rgba(78, 115, 223, 0.3);
}

.pagination .page-item.active .page-link {
    background: var(--primary-color);
    color: white;
    transform: scale(1.1);
}

/* 登录注册页面美化 */
.login-card, .register-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
}

.login-card .card-header,
.register-card .card-header {
    background: linear-gradient(135deg, var(--primary-color), var(--info-color)) !important;
}

/* 表单增强 */
.input-group-text {
    background: linear-gradient(135deg, var(--primary-color), var(--info-color));
    color: white;
    border: none;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(78, 115, 223, 0.25);
}

/* 头像样式 */
.avatar-container {
    position: relative;
}

.avatar-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent, rgba(78, 115, 223, 0.2));
    border-radius: 50%;
    opacity: 0;
    transition: var(--transition);
}

.avatar-container:hover .avatar-overlay {
    opacity: 1;
}

/* 信息卡片 */
.info-card {
    transition: var(--transition);
    border: 1px solid rgba(78, 115, 223, 0.1);
}

.info-card .icon-wrapper {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.8);
}

/* 打字机效果 */
.typing-animation {
    margin-top: 1rem;
}

.typewriter {
    display: inline-block;
    overflow: hidden;
    border-right: 0.15em solid var(--primary-color);
    white-space: nowrap;
    margin: 0 auto;
    letter-spacing: 0.15em;
    animation: typing 3.5s steps(40, end), blink-caret 0.75s step-end infinite;
}

/* 搜索页面美化 */
.search-form .input-group-lg .form-control {
    border-radius: 0;
    border-left: none;
    border-right: none;
}

.search-form .input-group-lg .input-group-text {
    border-radius: var(--border-radius) 0 0 var(--border-radius);
}

.search-form .input-group-lg .btn {
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.search-illustration {
    position: relative;
}

.search-illustration::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, rgba(78, 115, 223, 0.1), rgba(54, 185, 204, 0.1));
    border-radius: 50%;
    z-index: -1;
}

/* 联系页面美化 */
.contact-decoration {
    margin-top: 1rem;
    font-size: 1.5rem;
}

/* 分类页面美化 */
.category-icon {
    position: relative;
}

.category-icon::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    z-index: -1;
}

/* 文章详情页增强 */
.featured-image-container {
    position: relative;
    overflow: hidden;
}

.image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent, rgba(0, 0, 0, 0.1));
    opacity: 0;
    transition: var(--transition);
}

.featured-image-container:hover .image-overlay {
    opacity: 1;
}

/* 空状态美化 */
.empty-comments {
    padding: 2rem;
    border-radius: var(--border-radius);
    background: linear-gradient(135deg, rgba(78, 115, 223, 0.05), rgba(54, 185, 204, 0.05));
}

/* 响应式增强 */
@media (max-width: 768px) {
    .post-header {
        padding: 1.5rem;
    }

    .post-title {
        font-size: 2rem;
    }

    .post-meta-enhanced {
        flex-direction: column;
        gap: 0.5rem;
    }

    .meta-item {
        justify-content: center;
    }

    .info-card {
        text-align: center;
    }

    .search-form .input-group-lg {
        flex-direction: column;
    }

    .search-form .input-group-lg .form-control,
    .search-form .input-group-lg .input-group-text,
    .search-form .input-group-lg .btn {
        border-radius: var(--border-radius);
        margin-bottom: 0.5rem;
    }
}

/* 错误页面特殊效果 */
.error-animation {
    position: relative;
    display: inline-block;
}

.error-animation::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(78, 115, 223, 0.1), transparent);
    border-radius: 50%;
    z-index: -1;
    animation: pulse 3s infinite;
}

.error-icon {
    position: relative;
}

.error-icon::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100px;
    height: 100px;
    background: radial-gradient(circle, rgba(231, 74, 59, 0.1), transparent);
    border-radius: 50%;
    z-index: -1;
}

/* 加载动画增强 */
.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

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

/* 页面切换动画 */
.page-transition {
    animation: pageSlideIn 0.5s ease-out;
}

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

/* 特殊按钮效果 */
.btn-gradient {
    background: linear-gradient(135deg, var(--primary-color), var(--info-color));
    border: none;
    color: white;
    position: relative;
    overflow: hidden;
}

.btn-gradient::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn-gradient:hover::before {
    left: 100%;
}

/* 文字渐变效果 */
.text-gradient {
    background: linear-gradient(135deg, var(--primary-color), var(--info-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 深色模式适配 */
@media (prefers-color-scheme: dark) {
    .card {
        background-color: #2d3748;
        color: #e2e8f0;
    }

    .form-control {
        background-color: #4a5568;
        color: #e2e8f0;
        border-color: #718096;
    }

    .input-group-text {
        background-color: #4a5568;
        color: #e2e8f0;
        border-color: #718096;
    }
}

/* 最终优化 */
* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    overflow-x: hidden;
}

.container, .container-fluid {
    animation: fadeIn 0.6s ease-out;
}

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

/* 现代化组件样式 */
.modern-grid {
    display: grid;
    gap: 2rem;
    margin-bottom: 2rem;
}

.modern-grid-1 {
    grid-template-columns: 1fr;
}

.modern-grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.modern-grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.modern-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    transition: all var(--duration-normal) var(--ease-out);
    border: 1px solid var(--gray-200);
    position: relative;
    overflow: hidden;
}

.modern-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--info-color));
    opacity: 0;
    transition: opacity var(--duration-normal) var(--ease-out);
}

.modern-card:hover::before {
    opacity: 1;
}

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

.modern-title {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--info-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.modern-subtitle {
    font-size: 1.5rem;
    font-weight: 600;
    line-height: 1.3;
    color: var(--gray-800);
    margin-bottom: 1rem;
}

.modern-text {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--gray-600);
}

.modern-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--duration-fast) var(--ease-out);
}

.modern-badge-primary {
    background: rgba(78, 115, 223, 0.1);
    color: var(--primary-color);
    border: 1px solid rgba(78, 115, 223, 0.2);
}

.modern-badge-success {
    background: rgba(28, 200, 138, 0.1);
    color: var(--success-color);
    border: 1px solid rgba(28, 200, 138, 0.2);
}

.modern-badge-warning {
    background: rgba(246, 194, 62, 0.1);
    color: var(--warning-color);
    border: 1px solid rgba(246, 194, 62, 0.2);
}

.modern-badge-danger {
    background: rgba(231, 74, 59, 0.1);
    color: var(--danger-color);
    border: 1px solid rgba(231, 74, 59, 0.2);
}

.modern-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 500;
    text-decoration: none;
    transition: all var(--duration-normal) var(--ease-out);
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.modern-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left var(--duration-slow) var(--ease-out);
}

.modern-btn:hover::before {
    left: 100%;
}

.modern-btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 12px rgba(78, 115, 223, 0.3);
}

.modern-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(78, 115, 223, 0.4);
    color: white;
}

.modern-btn-secondary {
    background: var(--gray-100);
    color: var(--gray-700);
    border: 1px solid var(--gray-300);
}

.modern-btn-secondary:hover {
    background: var(--gray-200);
    transform: translateY(-2px);
    color: var(--gray-800);
}