/* ===================================
   体坛小奔智慧教育信息化产品宣传网站
   全局样式文件
   =================================== */

/* CSS Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 主色调 - 科技蓝 */
    --primary-color: #1e88e5;
    --primary-dark: #1565c0;
    --primary-light: #42a5f5;
    
    /* 渐变色 */
    --gradient-blue: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-tech: linear-gradient(120deg, #2196f3 0%, #3b78e7 50%, #1e3a8a 100%);
    
    /* 辅助色 */
    --accent-color: #00bcd4;
    --success-color: #4caf50;
    --warning-color: #ff9800;
    
    /* 中性色 */
    --text-primary: #212121;
    --text-secondary: #757575;
    --text-light: #ffffff;
    --bg-light: #f5f7fa;
    --bg-white: #ffffff;
    --border-color: #e0e0e0;
    
    /* 阴影 */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 8px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 16px rgba(0,0,0,0.15);
    --shadow-xl: 0 12px 24px rgba(0,0,0,0.2);
    
    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;
}

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-light);
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===================================
   导航栏
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.navbar-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    max-width: 1400px;
    margin: 0 auto;
}

.navbar-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.navbar-logo-icon {
    font-size: 2rem;
}

.navbar-menu {
    display: flex;
    gap: var(--spacing-lg);
}

.navbar-menu-item {
    position: relative;
    padding: var(--spacing-sm) 0;
    cursor: pointer;
    color: var(--text-primary);
    font-weight: 500;
    transition: color 0.3s ease;
}

.navbar-menu-item:hover {
    color: var(--primary-color);
}

.navbar-menu-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-tech);
    transition: width 0.3s ease;
}

.navbar-menu-item:hover::after {
    width: 100%;
}

.navbar-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.navbar-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* ===================================
   Banner 区域
   =================================== */
.banner {
    position: relative;
    height: 100vh;
    min-height: 600px;
    background: var(--gradient-tech);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.banner-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.particle {
    position: absolute;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    animation: float 15s infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) translateX(0);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(-100vh) translateX(50px);
        opacity: 0;
    }
}

.banner-content {
    position: relative;
    z-index: 10;
    text-align: center;
    color: var(--text-light);
    padding: var(--spacing-xl);
}

.banner-title {
    font-size: 3.5rem;
    font-weight: bold;
    margin-bottom: var(--spacing-md);
    text-shadow: 0 4px 8px rgba(0,0,0,0.3);
    animation: fadeInUp 1s ease;
}

.banner-subtitle {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
    animation: fadeInUp 1s ease 0.2s both;
}

.banner-description {
    font-size: 1.1rem;
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
    line-height: 1.8;
    opacity: 0.85;
    animation: fadeInUp 1s ease 0.4s both;
}

.banner-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    animation: fadeInUp 1s ease 0.6s both;
}

.btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-xl);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.btn-primary {
    background: var(--text-light);
    color: var(--primary-color);
}

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

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

.btn-secondary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

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

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

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

/* ===================================
   产品分类区域
   =================================== */
.categories-section {
    padding: var(--spacing-xl) 0;
    background: var(--bg-white);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.category-card {
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.category-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
    background: var(--bg-white);
}

.category-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.category-title {
    font-size: 1.3rem;
    font-weight: bold;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.category-count {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ===================================
   产品展示区域
   =================================== */
.products-section {
    padding: var(--spacing-xl) 0;
    background: var(--bg-light);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.product-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    cursor: pointer;
}

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

.product-card-header {
    background: var(--gradient-tech);
    padding: var(--spacing-lg);
    color: var(--text-light);
}

.product-card-title {
    font-size: 1.3rem;
    font-weight: bold;
    margin-bottom: var(--spacing-xs);
}

.product-card-tech {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.tech-tag {
    background: rgba(255, 255, 255, 0.2);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
}

.product-card-body {
    padding: var(--spacing-lg);
}

.product-card-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.product-cases {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.product-link {
    color: var(--primary-color);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.product-link:hover {
    color: var(--primary-dark);
}

/* ===================================
   典型案例区域
   =================================== */
.cases-section {
    padding: var(--spacing-xl) 0;
    background: var(--bg-white);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.case-card {
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    border-left: 4px solid var(--primary-color);
    transition: all 0.3s ease;
}

.case-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateX(5px);
}

/* Logo 展示区悬停效果 */
.partner-logo {
    transition: all 0.3s ease;
    cursor: pointer;
}

.partner-logo:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 8px 16px rgba(0,0,0,0.15);
}

.case-organization {
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.case-products {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.case-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--accent-color);
    font-weight: 600;
}

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

/* ===================================
   页脚
   =================================== */
.footer {
    background: var(--gradient-tech);
    color: var(--text-light);
    padding: var(--spacing-xl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.footer-section h3 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-md);
}

.footer-section p,
.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    line-height: 2;
}

.footer-section a:hover {
    color: var(--text-light);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    color: rgba(255, 255, 255, 0.6);
}

/* ===================================
   产品详情页样式
   =================================== */
.product-detail {
    padding: var(--spacing-xl) 0;
}

.product-detail-header {
    background: var(--gradient-tech);
    color: var(--text-light);
    padding: calc(var(--spacing-xl) * 2) 0 var(--spacing-xl);
    text-align: center;
}

.product-detail-title {
    font-size: 3rem;
    font-weight: bold;
    margin-bottom: var(--spacing-md);
}

.product-detail-tech {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.tech-badge {
    background: rgba(255, 255, 255, 0.2);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-xl);
    font-weight: 600;
}

.product-detail-description {
    max-width: 900px;
    margin: 0 auto;
    font-size: 1.1rem;
    opacity: 0.9;
    line-height: 1.8;
}

.product-detail-section {
    padding: var(--spacing-xl) 0;
}

.detail-section-title {
    font-size: 2rem;
    font-weight: bold;
    margin-bottom: var(--spacing-lg);
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.feature-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.feature-item {
    background: var(--bg-light);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--primary-color);
    transition: all 0.3s ease;
}

.feature-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(5px);
}

.feature-title {
    font-size: 1.1rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.feature-desc {
    color: var(--text-secondary);
    line-height: 1.8;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.stat-card {
    text-align: center;
    background: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.stat-number {
    font-size: 3rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 1rem;
}

.back-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    cursor: pointer;
    transition: all 0.3s ease;
}

.back-button:hover {
    color: var(--primary-dark);
    transform: translateX(-5px);
}

/* ===================================
   工具类
   =================================== */
.text-center {
    text-align: center;
}

.mt-2 {
    margin-top: var(--spacing-lg);
}

.mb-2 {
    margin-bottom: var(--spacing-lg);
}

.hidden {
    display: none;
}

/* ===================================
   动画效果
   =================================== */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0) translateX(-50%);
    }
    40% {
        transform: translateY(-10px) translateX(-50%);
    }
    60% {
        transform: translateY(-5px) translateX(-50%);
    }
}