/* ========================================
   Top蜂产品展示网站 - 全局样式
   ======================================== */

/* 全局变量定义 */
:root {
    --primary-color: #FF6B35;
    --secondary-color: #004E89;
    --accent-color: #F7931E;
    --text-dark: #333333;
    --text-light: #666666;
    --bg-light: #F8F9FA;
    --bg-white: #FFFFFF;
    --border-color: #E0E0E0;
    --success-color: #28A745;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 8px rgba(0,0,0,0.15);
    --shadow-lg: 0 8px 16px rgba(0,0,0,0.2);
}

/* 全局重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
}

/* 导航栏样式 */
.navbar {
    background-color: var(--bg-white);
    box-shadow: var(--shadow-sm);
    padding: 1rem 0;
}

.navbar-brand {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color) !important;
}

.navbar-brand img {
    height: 40px;
    margin-right: 10px;
}

.navbar-nav .nav-link {
    color: var(--text-dark);
    font-weight: 500;
    padding: 0.5rem 1rem;
    transition: color 0.3s ease;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: var(--primary-color);
}

/* 移动端汉堡菜单 */
.navbar-toggler {
    border: none;
    padding: 0.5rem;
}

.navbar-toggler:focus {
    box-shadow: none;
}

/* 轮播图样式 */
.hero-carousel {
    margin-top: 0;
}

.carousel-item {
    height: 500px;
    background-color: var(--bg-light);
}

.carousel-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.carousel-caption {
    background-color: rgba(0, 0, 0, 0.5);
    padding: 2rem;
    border-radius: 10px;
}

.carousel-caption h2 {
    font-size: 2.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
}

.carousel-caption p {
    font-size: 1.2rem;
}

/* 功能亮点区域 */
.features-section {
    padding: 4rem 0;
    background-color: var(--bg-white);
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h2 {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.section-title p {
    font-size: 1.1rem;
    color: var(--text-light);
}

.feature-card {
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
    height: 100%;
    box-shadow: var(--shadow-sm);
}

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

.feature-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.feature-card p {
    font-size: 1rem;
    color: var(--text-light);
    line-height: 1.8;
}

/* 产品介绍区域 */
.product-intro-section {
    padding: 4rem 0;
    background-color: var(--bg-light);
}

.product-card {
    background-color: var(--bg-white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    margin-bottom: 2rem;
}

.product-card img {
    width: 100%;
    height: 300px;
    object-fit: cover;
}

.product-card-body {
    padding: 2rem;
}

.product-card-body h3 {
    font-size: 1.8rem;
    font-weight: bold;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.product-card-body p {
    font-size: 1rem;
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.btn-primary-custom {
    background-color: var(--primary-color);
    border: none;
    color: white;
    padding: 0.75rem 2rem;
    font-size: 1rem;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.btn-primary-custom:hover {
    background-color: #E55A2B;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* 底部Footer */
.footer {
    background-color: var(--text-dark);
    color: white;
    padding: 2rem 0 1rem;
    margin-top: 4rem;
}

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

.footer-content p {
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.footer-links {
    margin-top: 1rem;
}

.footer-links a {
    color: white;
    text-decoration: none;
    margin: 0 1rem;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--accent-color);
}

/* 使用教程页面样式 */
.tutorial-section {
    padding: 4rem 0;
}

.video-container {
    position: relative;
    width: 100%;
    max-width: 900px;
    margin: 2rem auto;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.video-container video {
    width: 100%;
    height: auto;
    display: block;
}

.tutorial-text {
    background-color: var(--bg-light);
    padding: 2rem;
    border-radius: 10px;
    margin-bottom: 2rem;
}

.tutorial-text h3 {
    font-size: 1.8rem;
    font-weight: bold;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.tutorial-text p {
    font-size: 1.1rem;
    color: var(--text-light);
    line-height: 1.8;
}

/* 更新日志页面样式 */
.changelog-section {
    padding: 4rem 0;
}

/* 下载区域样式 */
.download-section {
    margin-bottom: 3rem;
}

.download-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 15px;
    padding: 2.5rem 2rem;
    text-align: center;
    box-shadow: var(--shadow-lg);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    color: var(--bg-white);
}

.download-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px rgba(0,0,0,0.25);
}

.download-card-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.download-card h4 {
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
    color: var(--bg-white);
}

.download-card .text-muted {
    color: rgba(255, 255, 255, 0.8) !important;
    font-size: 0.95rem;
}

.download-card .btn {
    background-color: var(--bg-white);
    color: #667eea;
    border: none;
    font-weight: 600;
    padding: 0.75rem 2rem;
    transition: all 0.3s ease;
}

.download-card .btn:hover {
    background-color: var(--primary-color);
    color: var(--bg-white);
    transform: scale(1.05);
}

.nav-tabs {
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 2rem;
}

.nav-tabs .nav-link {
    color: var(--text-dark);
    font-weight: 500;
    border: none;
    padding: 1rem 2rem;
    transition: all 0.3s ease;
}

.nav-tabs .nav-link:hover {
    color: var(--primary-color);
    border-color: transparent;
}

.nav-tabs .nav-link.active {
    color: var(--primary-color);
    background-color: transparent;
    border-bottom: 3px solid var(--primary-color);
}

.version-item {
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-sm);
}

.version-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.version-number {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.version-date {
    font-size: 1rem;
    color: var(--text-light);
}

.version-content ul {
    list-style: none;
    padding-left: 0;
}

.version-content li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-dark);
}

.version-content li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
}

.download-btn {
    background-color: var(--success-color);
    border: none;
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 5px;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s ease;
    margin-top: 1rem;
}

.download-btn:hover {
    background-color: #218838;
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .carousel-item {
        height: 300px;
    }
    
    .carousel-caption h2 {
        font-size: 1.5rem;
    }
    
    .carousel-caption p {
        font-size: 1rem;
    }
    
    .section-title h2 {
        font-size: 2rem;
    }
    
    .feature-card {
        margin-bottom: 1.5rem;
    }
    
    .version-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .version-number {
        margin-bottom: 0.5rem;
    }
}

@media (max-width: 576px) {
    .navbar-brand {
        font-size: 1.2rem;
    }
    
    .navbar-brand img {
        height: 30px;
    }
    
    .carousel-item {
        height: 250px;
    }
    
    .section-title h2 {
        font-size: 1.8rem;
    }
    
    .footer-links a {
        display: block;
        margin: 0.5rem 0;
    }
}