/* 
 * 企业管理系统 - 统一现代化样式
 * 整合所有页面样式，统一设计风格
 * 设计理念：简洁、优雅、现代化、专业感
 */

/* ===== CSS变量 - 统一设计系统 ===== */
:root {
    /* 主色调系统 */
    --color-primary: #4f46e5;
    --color-primary-light: #6366f1;
    --color-primary-dark: #4338ca;
    
    /* 中性色调 */
    --color-white: #ffffff;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    --color-black: #000000;
    
    /* 功能色调 */
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-info: #3b82f6;
    
    /* 背景色 */
    --bg-primary: var(--color-white);
    --bg-secondary: var(--color-gray-50);
    --bg-card: var(--color-white);
    --bg-dark: var(--color-gray-900);
    
    /* 文字色 */
    --text-primary: var(--color-gray-800);
    --text-secondary: var(--color-gray-600);
    --text-light: var(--color-gray-50);
    --text-dark: var(--color-gray-900);
    
    /* 边框色 */
    --border-light: var(--color-gray-200);
    --border-medium: var(--color-gray-300);
    --border-dark: var(--color-gray-400);
    
    /* 阴影系统 */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --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);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* 圆角系统 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
    
    /* 过渡动画 */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* 渐变系统 */
    --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    --gradient-dark: linear-gradient(135deg, var(--color-gray-800) 0%, var(--color-gray-900) 100%);
    --gradient-light: linear-gradient(135deg, var(--color-gray-50) 0%, var(--color-gray-100) 100%);
    
    /* 间距系统 */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    --space-32: 8rem;
    
    /* 字体大小 */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;
    --text-7xl: 4.5rem;
    --text-8xl: 6rem;
    --text-9xl: 8rem;
    
    /* 字体粗细 */
    --font-thin: 100;
    --font-extralight: 200;
    --font-light: 300;
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    --font-extrabold: 800;
    --font-black: 900;
    
    /* 容器宽度 */
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1280px;
    --container-2xl: 1536px;
}

/* ===== 全局重置与基础样式 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

/* 容器 */
.container {
    width: 100%;
    max-width: var(--container-xl);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

/* ===== 导航栏 - 统一设计 ===== */
.navbar {
    background-color: var(--bg-primary);
    box-shadow: var(--shadow-sm);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-4) 0;
    transition: var(--transition-base);
}

.navbar.scrolled {
    padding: var(--space-3) 0;
    box-shadow: var(--shadow-md);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-8);
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--text-2xl);
    font-weight: var(--font-bold);
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition-base);
}

.logo:hover {
    color: var(--color-primary);
}

.logo i {
    font-size: var(--text-3xl);
    color: var(--color-primary);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 导航链接 */
.nav-links {
    display: flex;
    list-style: none;
    gap: var(--space-1);
    flex-shrink: 0;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: var(--font-medium);
    padding: var(--space-3) var(--space-5);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
    white-space: nowrap;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--color-primary);
    background-color: rgba(79, 70, 229, 0.05);
}

.nav-links a i {
    margin-right: var(--space-2);
    font-size: var(--text-base);
}

/* 登录按钮 */
.btn-login {
    background: var(--gradient-primary);
    color: var(--text-light) !important;
    font-weight: var(--font-semibold);
    padding: var(--space-3) var(--space-6) !important;
    border-radius: var(--radius-md);
    box-shadow: 0 4px 6px rgba(79, 70, 229, 0.2);
    transition: var(--transition-base);
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(79, 70, 229, 0.3);
}

/* 预览按钮 */
.btn-preview {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--text-light) !important;
    font-weight: var(--font-semibold);
    padding: var(--space-3) var(--space-6) !important;
    border-radius: var(--radius-md);
    box-shadow: 0 4px 6px rgba(102, 126, 234, 0.2);
    transition: var(--transition-base);
}

.btn-preview:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(102, 126, 234, 0.3);
}

/* 移动菜单 */
.mobile-menu {
    display: none;
    font-size: var(--text-2xl);
    cursor: pointer;
    color: var(--text-primary);
    padding: var(--space-2);
    border-radius: var(--radius-sm);
    background: var(--bg-secondary);
    transition: var(--transition-base);
}

.mobile-menu:hover {
    background: var(--bg-secondary);
    color: var(--color-primary);
}

/* ===== 英雄区域 - 现代化设计 ===== */
.hero {
    padding: 160px 0 80px;
    background: var(--modern-gradient-light);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 10% 20%, rgba(79, 70, 229, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(99, 102, 241, 0.05) 0%, transparent 40%);
    z-index: 0;
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 64px;
    position: relative;
    z-index: 1;
}

.hero-content {
    flex: 1;
    animation: fadeInUp 1s ease-out;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    line-height: 1.1;
    color: var(--modern-text-dark);
}

.hero-content h1 span {
    background: var(--modern-gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 1.5rem;
    color: var(--modern-text-gray);
    margin-bottom: 24px;
    font-weight: 500;
}

.description {
    font-size: 1.125rem;
    color: var(--modern-text-gray);
    margin-bottom: 40px;
    max-width: 600px;
    line-height: 1.7;
}

/* 按钮组 */
.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* 按钮基础样式 */
.btn-primary, .btn-secondary, .btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 16px 32px;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--modern-transition);
    border: none;
    cursor: pointer;
    min-width: 160px;
}

.btn-primary {
    background: var(--modern-gradient-accent);
    color: var(--modern-text-light);
    box-shadow: 0 4px 6px rgba(79, 70, 229, 0.2);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(79, 70, 229, 0.3);
}

.btn-secondary {
    background: var(--modern-primary);
    color: var(--modern-accent);
    border: 2px solid var(--modern-accent);
}

.btn-secondary:hover {
    background: var(--modern-accent);
    color: var(--modern-text-light);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--modern-text-dark);
    border: 2px solid #e5e7eb;
}

.btn-outline:hover {
    border-color: var(--modern-accent);
    color: var(--modern-accent);
    transform: translateY(-2px);
}

/* 英雄图片区域 */
.hero-image {
    flex: 1;
    position: relative;
    animation: float 6s ease-in-out infinite;
}

.hero-image img {
    width: 100%;
    height: auto;
    border-radius: var(--modern-border-radius);
    box-shadow: var(--modern-shadow-xl);
    transition: var(--modern-transition);
}

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

/* ===== 功能特性 - 卡片设计 ===== */
.features {
    padding: 100px 0;
    background: var(--modern-bg-light);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 16px;
    color: var(--modern-text-dark);
}

.section-subtitle {
    text-align: center;
    font-size: 1.125rem;
    color: var(--modern-text-gray);
    margin-bottom: 64px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* 功能网格 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

/* 功能卡片 */
.feature-card {
    background: var(--modern-bg-card);
    padding: 40px 32px;
    border-radius: var(--modern-border-radius);
    text-align: center;
    border: 1px solid #f1f5f9;
    transition: var(--modern-transition);
    position: relative;
    overflow: hidden;
    animation: fadeInUp 0.6s ease-out;
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: var(--modern-accent);
    box-shadow: var(--modern-shadow-xl);
}

/* 图标容器 */
.feature-icon {
    width: 80px;
    height: 80px;
    background: var(--modern-gradient-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    transition: var(--modern-transition);
}

.feature-card:hover .feature-icon {
    background: var(--modern-gradient-accent);
    transform: scale(1.1);
}

.feature-icon i {
    font-size: 2rem;
    color: var(--modern-accent);
    transition: var(--modern-transition);
}

.feature-card:hover .feature-icon i {
    color: var(--modern-text-light);
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 16px;
    color: var(--modern-text-dark);
    font-weight: 600;
}

.feature-card p {
    color: var(--modern-text-gray);
    line-height: 1.7;
    font-size: 1rem;
}

/* ===== 产品展示 - 现代化定价卡片 ===== */
.products {
    padding: 100px 0;
    background: var(--modern-bg-gray);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
}

/* 产品卡片 */
.product-card {
    background: var(--modern-bg-card);
    border-radius: var(--modern-border-radius);
    overflow: hidden;
    border: 1px solid #f1f5f9;
    transition: var(--modern-transition);
    position: relative;
    animation: fadeInUp 0.6s ease-out;
}

.product-card:hover {
    transform: translateY(-8px);
    border-color: var(--modern-accent);
    box-shadow: var(--modern-shadow-xl);
}

/* 推荐卡片 */
.product-card.featured {
    border: 2px solid var(--modern-accent);
    position: relative;
}

.product-badge {
    position: absolute;
    top: 20px;
    left: 20px;
    padding: 6px 16px;
    background: var(--modern-gradient-accent);
    color: var(--modern-text-light);
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    z-index: 1;
}

/* 产品头部 */
.product-header {
    padding: 40px 32px 24px;
    border-bottom: 1px solid #f1f5f9;
    text-align: center;
}

.product-header h3 {
    font-size: 1.75rem;
    margin-bottom: 12px;
    color: var(--modern-text-dark);
    font-weight: 600;
}

.price {
    font-size: 3rem;
    font-weight: 800;
    color: var(--modern-accent);
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 4px;
}

.price span {
    font-size: 1rem;
    color: var(--modern-text-gray);
    font-weight: 400;
}

/* 产品特性列表 */
.product-features {
    padding: 32px;
    list-style: none;
}

.product-features li {
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--modern-text-gray);
    font-size: 1rem;
}

.product-features i.fa-check {
    color: var(--modern-green);
    font-size: 1rem;
}

.product-features i.fa-times {
    color: #9ca3af;
}

.product-card > a {
    display: block;
    margin: 0 32px 32px;
    text-align: center;
}

/* ===== 页脚 - 现代化设计 ===== */
.footer {
    background: var(--modern-text-dark);
    padding: 80px 0 32px;
    color: var(--modern-text-light);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 48px;
    margin-bottom: 48px;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 20px;
    color: var(--modern-text-light);
    font-weight: 600;
}

.footer-section h3 {
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer-section p {
    color: #d1d5db;
    margin-bottom: 20px;
    line-height: 1.7;
    font-size: 1rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 12px;
}

.footer-section ul li a {
    color: #d1d5db;
    text-decoration: none;
    transition: var(--modern-transition);
    display: inline-block;
    padding: 4px 0;
}

.footer-section ul li a:hover {
    color: var(--modern-text-light);
    padding-left: 8px;
}

/* 联系信息 */
.contact-info li {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    color: #d1d5db;
}

.contact-info i {
    color: var(--modern-accent);
    width: 20px;
    font-size: 1rem;
}

/* 社交链接 */
.social-links {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--modern-text-light);
    text-decoration: none;
    transition: var(--modern-transition);
}

.social-links a:hover {
    background: var(--modern-accent);
    transform: translateY(-2px);
}

/* 页脚底部 */
.footer-bottom {
    text-align: center;
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #9ca3af;
    font-size: 0.875rem;
}

.footer-bottom a {
    color: var(--modern-accent-light);
    text-decoration: none;
    transition: var(--modern-transition);
}

.footer-bottom a:hover {
    color: var(--modern-text-light);
    text-decoration: underline;
}

/* ===== 页面头部 ===== */
.page-header {
    padding: 160px 0 80px;
    background: var(--modern-gradient-light);
    text-align: center;
    position: relative;
}

.page-header h1 {
    font-size: 3rem;
    margin-bottom: 16px;
    color: var(--modern-text-dark);
    font-weight: 800;
}

.page-header p {
    font-size: 1.25rem;
    color: var(--modern-text-gray);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* ===== 动画效果 ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-15px);
    }
}

/* 延迟动画 */
.feature-card:nth-child(1) { animation-delay: 0.1s; }
.feature-card:nth-child(2) { animation-delay: 0.2s; }
.feature-card:nth-child(3) { animation-delay: 0.3s; }
.feature-card:nth-child(4) { animation-delay: 0.4s; }

.product-card:nth-child(1) { animation-delay: 0.1s; }
.product-card:nth-child(2) { animation-delay: 0.2s; }
.product-card:nth-child(3) { animation-delay: 0.3s; }

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
    .container {
        padding: 0 20px;
    }
    
    .hero-content h1 {
        font-size: 2.75rem;
    }
    
    .section-title {
        font-size: 2.25rem;
    }
}

@media (max-width: 768px) {
    .hero .container {
        flex-direction: column;
        text-align: center;
        gap: 48px;
    }
    
    .hero-content h1 {
        font-size: 2.25rem;
    }
    
    .subtitle {
        font-size: 1.25rem;
    }
    
    .description {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .section-subtitle {
        font-size: 1rem;
    }
    
    .nav-links {
        display: none;
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--modern-primary);
        padding: 20px;
        flex-direction: column;
        gap: 12px;
        z-index: 999;
        box-shadow: var(--modern-shadow-md);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .mobile-menu {
        display: block;
    }
    
    .features-grid,
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .feature-card,
    .product-card {
        padding: 32px 24px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-buttons a {
        width: 100%;
        max-width: 280px;
    }
    
    .page-header h1 {
        font-size: 2.25rem;
    }
    
    .page-header p {
        font-size: 1.125rem;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 1.875rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .feature-card,
    .product-card {
        padding: 24px 20px;
    }
    
    .product-header {
        padding: 32px 20px 20px;
    }
    
    .product-features {
        padding: 24px 20px;
    }
    
    .price {
        font-size: 2.5rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}

/* ===== 滚动条美化 ===== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--modern-bg-gray);
}

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

::-webkit-scrollbar-thumb:hover {
    background: var(--modern-accent-light);
}

/* ===== 选择文本样式 ===== */
::selection {
    background-color: rgba(79, 70, 229, 0.2);
    color: var(--modern-text-dark);
}

/* ===== 焦点样式 ===== */
:focus {
    outline: 2px solid var(--modern-accent);
    outline-offset: 2px;
}

/* ===== 工具类 ===== */
.text-gradient {
    background: var(--modern-gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.shadow-hover {
    transition: var(--modern-transition);
}

.shadow-hover:hover {
    box-shadow: var(--modern-shadow-xl);
}

/* ===== 文章列表页面样式 ===== */
.articles {
    padding: 80px 0 100px;
    background: var(--modern-bg-light);
}

/* 文章筛选 */
.article-filters {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 48px;
    flex-wrap: wrap;
    gap: 24px;
}

.filter-group {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 20px;
    background: var(--modern-bg-gray);
    color: var(--modern-text-gray);
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--modern-transition);
}

.filter-btn:hover {
    background: var(--modern-bg-card);
    border-color: var(--modern-accent);
    color: var(--modern-accent);
}

.filter-btn.active {
    background: var(--modern-gradient-accent);
    color: var(--modern-text-light);
    border-color: var(--modern-accent);
}

.search-box {
    display: flex;
    align-items: center;
    gap: 0;
    background: var(--modern-bg-card);
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    overflow: hidden;
    min-width: 300px;
}

.search-box input {
    flex: 1;
    padding: 12px 20px;
    border: none;
    background: transparent;
    color: var(--modern-text-dark);
    font-size: 0.95rem;
    outline: none;
}

.search-box input::placeholder {
    color: var(--modern-text-gray);
}

.search-btn {
    padding: 12px 20px;
    background: var(--modern-bg-gray);
    color: var(--modern-text-gray);
    border: none;
    cursor: pointer;
    transition: var(--modern-transition);
}

.search-btn:hover {
    background: var(--modern-accent);
    color: var(--modern-text-light);
}

/* 文章网格 */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 32px;
    margin-bottom: 48px;
}

/* 文章卡片 */
.article-card {
    background: var(--modern-bg-card);
    border-radius: var(--modern-border-radius);
    overflow: hidden;
    border: 1px solid #f1f5f9;
    transition: var(--modern-transition);
    animation: fadeInUp 0.6s ease-out;
}

.article-card:hover {
    transform: translateY(-8px);
    border-color: var(--modern-accent);
    box-shadow: var(--modern-shadow-xl);
}

.article-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.article-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--modern-transition);
}

.article-card:hover .article-image img {
    transform: scale(1.05);
}

.article-category {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 6px 12px;
    background: var(--modern-gradient-accent);
    color: var(--modern-text-light);
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    z-index: 1;
}

.article-content {
    padding: 24px;
}

.article-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    font-size: 0.875rem;
    color: var(--modern-text-gray);
}

.article-meta span {
    display: flex;
    align-items: center;
    gap: 6px;
}

.article-meta i {
    font-size: 0.875rem;
}

.article-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--modern-text-dark);
    line-height: 1.4;
}

.article-excerpt {
    color: var(--modern-text-gray);
    margin-bottom: 20px;
    line-height: 1.6;
    font-size: 0.95rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 16px;
    border-top: 1px solid #f1f5f9;
}

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

.author-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
}

.author-name {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--modern-text-dark);
}

.read-more {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--modern-accent);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--modern-transition);
}

.read-more:hover {
    gap: 12px;
    color: var(--modern-accent-light);
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 16px;
    margin-top: 48px;
}

.page-btn {
    padding: 10px 20px;
    background: var(--modern-bg-card);
    color: var(--modern-text-dark);
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--modern-transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

.page-btn:hover:not(.disabled) {
    background: var(--modern-accent);
    color: var(--modern-text-light);
    border-color: var(--modern-accent);
}

.page-btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.page-numbers {
    display: flex;
    gap: 8px;
}

.page-number {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: var(--modern-bg-gray);
    color: var(--modern-text-gray);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--modern-transition);
}

.page-number:hover {
    background: var(--modern-bg-card);
    color: var(--modern-accent);
}

.page-number.active {
    background: var(--modern-gradient-accent);
    color: var(--modern-text-light);
}

/* 延迟动画 */
.article-card:nth-child(1) { animation-delay: 0.1s; }
.article-card:nth-child(2) { animation-delay: 0.2s; }
.article-card:nth-child(3) { animation-delay: 0.3s; }
.article-card:nth-child(4) { animation-delay: 0.4s; }
.article-card:nth-child(5) { animation-delay: 0.5s; }
.article-card:nth-child(6) { animation-delay: 0.6s; }

/* ===== 响应式调整 ===== */
@media (max-width: 768px) {
    .article-filters {
        flex-direction: column;
        align-items: stretch;
    }
    
    .filter-group {
        justify-content: center;
    }
    
    .search-box {
        min-width: 100%;
    }
    
    .articles-grid {
        grid-template-columns: 1fr;
    }
    
    .pagination {
        flex-wrap: wrap;
    }
    
    .page-numbers {
        order: 1;
        width: 100%;
        justify-content: center;
        margin: 16px 0;
    }
}

@media (max-width: 480px) {
    .article-card {
        margin-bottom: 24px;
    }
    
    .article-image {
        height: 180px;
    }
    
    .article-content {
        padding: 20px;
    }
    
    .article-title {
        font-size: 1.125rem;
    }
    
    .article-excerpt {
        font-size: 0.9rem;
    }
}

/* ===== 文章详情页面样式 ===== */

/* 面包屑导航 */
.breadcrumb {
    background: var(--modern-bg-gray);
    padding: 20px 0;
    margin-top: 80px;
    border-bottom: 1px solid #f1f5f9;
}

.breadcrumb .container {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.95rem;
}

.breadcrumb a {
    color: var(--modern-text-gray);
    text-decoration: none;
    transition: var(--modern-transition);
}

.breadcrumb a:hover {
    color: var(--modern-accent);
}

.breadcrumb i {
    font-size: 0.8rem;
    color: #9ca3af;
}

.breadcrumb .current {
    color: var(--modern-text-dark);
    font-weight: 500;
}

/* 文章详情 */
.article-detail {
    padding: 60px 0 100px;
    background: var(--modern-bg-light);
}

/* 文章头部 */
.article-header {
    margin-bottom: 48px;
}

.article-category {
    display: inline-block;
    padding: 6px 16px;
    background: var(--modern-gradient-accent);
    color: var(--modern-text-light);
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.article-title {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    color: var(--modern-text-dark);
}

.article-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid #f1f5f9;
}

.author-info {
    display: flex;
    align-items: center;
    gap: 16px;
}

.author-avatar {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--modern-bg-light);
    box-shadow: var(--modern-shadow-sm);
}

.author-details {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.author-name {
    font-weight: 600;
    color: var(--modern-text-dark);
    font-size: 1.125rem;
}

.author-title {
    color: var(--modern-text-gray);
    font-size: 0.95rem;
}

.article-stats {
    display: flex;
    gap: 24px;
    color: var(--modern-text-gray);
    font-size: 0.95rem;
}

.article-stats span {
    display: flex;
    align-items: center;
    gap: 8px;
}

.article-stats i {
    font-size: 1rem;
}

.article-cover {
    border-radius: var(--modern-border-radius);
    overflow: hidden;
    box-shadow: var(--modern-shadow-lg);
}

.article-cover img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    transition: var(--modern-transition);
}

.article-cover:hover img {
    transform: scale(1.02);
}

/* 文章内容 */
.article-content {
    max-width: 800px;
    margin: 0 auto;
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--modern-text-dark);
}

.article-summary {
    background: var(--modern-bg-gray);
    padding: 32px;
    border-radius: var(--modern-border-radius);
    margin-bottom: 48px;
    border-left: 4px solid var(--modern-accent);
}

.article-summary h3 {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    color: var(--modern-text-dark);
    font-size: 1.5rem;
}

.article-summary h3 i {
    color: var(--modern-accent);
}

.article-summary p {
    color: var(--modern-text-gray);
    font-size: 1.125rem;
    line-height: 1.7;
}

.content-section {
    margin-bottom: 48px;
}

.content-section h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--modern-text-dark);
    padding-bottom: 12px;
    border-bottom: 2px solid #f1f5f9;
}

.content-section p {
    margin-bottom: 20px;
    color: var(--modern-text-gray);
}

.highlight-box {
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.05) 0%, rgba(99, 102, 241, 0.05) 100%);
    padding: 24px;
    border-radius: var(--modern-border-radius);
    border: 1px solid rgba(79, 70, 229, 0.1);
    margin: 24px 0;
}

.highlight-box h4 {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    color: var(--modern-accent);
    font-size: 1.25rem;
}

.highlight-box p {
    color: var(--modern-text-dark);
    font-weight: 500;
    margin-bottom: 0;
}

.feature-list {
    list-style: none;
    margin: 24px 0;
    padding: 0;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    color: var(--modern-text-gray);
    font-size: 1.125rem;
}

.feature-list i {
    color: var(--modern-green);
    font-size: 1.125rem;
}

.quote-box {
    background: var(--modern-bg-gray);
    padding: 32px;
    border-radius: var(--modern-border-radius);
    margin: 32px 0;
    border-left: 4px solid var(--modern-accent);
    position: relative;
}

.quote-box p {
    font-size: 1.25rem;
    font-style: italic;
    color: var(--modern-text-dark);
    margin-bottom: 12px;
    line-height: 1.6;
}

.quote-box cite {
    color: var(--modern-text-gray);
    font-size: 1rem;
    font-style: normal;
}

/* 趋势总结 */
.trends-summary {
    background: var(--modern-gradient-light);
    padding: 48px;
    border-radius: var(--modern-border-radius);
    margin: 48px 0;
}

.trends-summary h3 {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 32px;
    color: var(--modern-text-dark);
    font-size: 1.75rem;
}

.trends-summary h3 i {
    color: var(--modern-accent);
}

.trends-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
}

.trend-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    background: var(--modern-bg-card);
    border-radius: 12px;
    border: 1px solid #f1f5f9;
    transition: var(--modern-transition);
}

.trend-item:hover {
    transform: translateY(-4px);
    border-color: var(--modern-accent);
    box-shadow: var(--modern-shadow-md);
}

.trend-number {
    width: 48px;
    height: 48px;
    background: var(--modern-gradient-accent);
    color: var(--modern-text-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 700;
    flex-shrink: 0;
}

.trend-content h4 {
    font-size: 1.125rem;
    margin-bottom: 4px;
    color: var(--modern-text-dark);
}

.trend-content p {
    font-size: 0.95rem;
    color: var(--modern-text-gray);
    margin-bottom: 0;
}

/* 结论 */
.conclusion {
    background: var(--modern-bg-gray);
    padding: 32px;
    border-radius: var(--modern-border-radius);
    margin: 48px 0;
}

.conclusion h3 {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    color: var(--modern-text-dark);
    font-size: 1.5rem;
}

.conclusion h3 i {
    color: var(--modern-accent);
}

.conclusion p {
    color: var(--modern-text-gray);
    font-size: 1.125rem;
    line-height: 1.7;
    margin-bottom: 16px;
}

/* 标签 */
.article-tags {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    margin: 32px 0;
    padding: 24px 0;
    border-top: 1px solid #f1f5f9;
    border-bottom: 1px solid #f1f5f9;
}

.tag-label {
    font-weight: 600;
    color: var(--modern-text-dark);
}

.tag-label i {
    margin-right: 8px;
    color: var(--modern-accent);
}

.tag {
    display: inline-block;
    padding: 6px 16px;
    background: var(--modern-bg-gray);
    color: var(--modern-text-gray);
    border-radius: 20px;
    text-decoration: none;
    font-size: 0.95rem;
    transition: var(--modern-transition);
}

.tag:hover {
    background: var(--modern-accent);
    color: var(--modern-text-light);
}

/* 分享 */
.article-share {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    margin: 32px 0 48px;
}

.share-label {
    font-weight: 600;
    color: var(--modern-text-dark);
}

.share-label i {
    margin-right: 8px;
    color: var(--modern-accent);
}

.share-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    color: var(--modern-text-light);
    text-decoration: none;
    transition: var(--modern-transition);
}

.share-btn.wechat { background: #07c160; }
.share-btn.weibo { background: #e6162d; }
.share-btn.linkedin { background: #0077b5; }
.share-btn.twitter { background: #1da1f2; }

.share-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--modern-shadow-md);
}

.copy-link {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--modern-bg-gray);
    color: var(--modern-text-gray);
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--modern-transition);
}

.copy-link:hover {
    background: var(--modern-accent);
    color: var(--modern-text-light);
    border-color: var(--modern-accent);
}

.copy-link i {
    font-size: 1rem;
}

/* 作者卡片 */
.author-card {
    background: var(--modern-bg-card);
    border-radius: var(--modern-border-radius);
    padding: 40px;
    margin: 48px 0;
    border: 1px solid #f1f5f9;
    box-shadow: var(--modern-shadow-sm);
}

.author-header {
    display: flex;
    align-items: center;
    gap: 32px;
    margin-bottom: 32px;
}

.author-large-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--modern-bg-light);
    box-shadow: var(--modern-shadow-md);
}

.author-info h3 {
    font-size: 1.75rem;
    margin-bottom: 8px;
    color: var(--modern-text-dark);
}

.author-title {
    color: var(--modern-accent);
    font-weight: 500;
    margin-bottom: 16px;
    font-size: 1.125rem;
}

.author-bio {
    color: var(--modern-text-gray);
    line-height: 1.7;
    font-size: 1.125rem;
}

.author-stats {
    display: flex;
    gap: 48px;
    padding-top: 32px;
    border-top: 1px solid #f1f5f9;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--modern-accent);
}

.stat-label {
    color: var(--modern-text-gray);
    font-size: 0.95rem;
}

/* 相关文章 */
.related-articles {
    margin-top: 64px;
}

.related-articles h3 {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 32px;
    color: var(--modern-text-dark);
    font-size: 1.75rem;
}

.related-articles h3 i {
    color: var(--modern-accent);
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.related-card {
    background: var(--modern-bg-card);
    border-radius: var(--modern-border-radius);
    overflow: hidden;
    border: 1px solid #f1f5f9;
    transition: var(--modern-transition);
}

.related-card:hover {
    transform: translateY(-8px);
    border-color: var(--modern-accent);
    box-shadow: var(--modern-shadow-xl);
}

.related-image {
    height: 200px;
    overflow: hidden;
}

.related-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--modern-transition);
}

.related-card:hover .related-image img {
    transform: scale(1.05);
}

.related-content {
    padding: 24px;
}

.related-content h4 {
    font-size: 1.25rem;
    margin-bottom: 12px;
    color: var(--modern-text-dark);
    font-weight: 600;
}

.related-content p {
    color: var(--modern-text-gray);
    margin-bottom: 20px;
    font-size: 1rem;
    line-height: 1.6;
}

.related-content .read-more {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--modern-accent);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--modern-transition);
}

.related-content .read-more:hover {
    gap: 12px;
    color: var(--modern-accent-light);
}

/* ===== 文章详情响应式设计 ===== */
@media (max-width: 1024px) {
    .article-title {
        font-size: 2.5rem;
    }
    
    .article-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
    }
    
    .article-stats {
        width: 100%;
        justify-content: flex-start;
    }
    
    .trends-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .article-title {
        font-size: 2rem;
    }
    
    .article-cover img {
        height: 300px;
    }
    
    .author-header {
        flex-direction: column;
        text-align: center;
        gap: 24px;
    }
    
    .trends-grid {
        grid-template-columns: 1fr;
    }
    
    .related-grid {
        grid-template-columns: 1fr;
    }
    
    .article-tags,
    .article-share {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    
    .article-summary,
    .highlight-box,
    .quote-box,
    .conclusion {
        padding: 24px;
    }
    
    .trends-summary {
        padding: 32px;
    }
}

@media (max-width: 480px) {
    .article-title {
        font-size: 1.75rem;
    }
    
    .article-cover img {
        height: 200px;
    }
    
    .article-stats {
        flex-direction: column;
        gap: 12px;
    }
    
    .author-stats {
        flex-direction: column;
        gap: 24px;
    }
    
    .content-section h2 {
        font-size: 1.5rem;
    }
    
    .article-content {
        font-size: 1rem;
    }
}

/* ===== 打印样式 ===== */
@media print {
    .navbar,
    .breadcrumb,
    .article-share,
    .related-articles,
    .footer {
        display: none;
    }
    
    .article-detail {
        padding: 0;
    }
    
    .article-title {
        font-size: 2rem;
    }
    
    .article-content {
        font-size: 12pt;
        line-height: 1.6;
    }
    
    .article-cover img {
        height: 200px;
    }
    
    body {
        color: #000;
        background: #fff;
    }
}