/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 50%, #dee2e6 100%);
    min-height: 100vh;
}

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

/* 头部样式 */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.logo {
    color: #1976d2;
    font-size: 1.8rem;
    font-weight: 700;
}

.nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav a {
    color: #333;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav a:hover {
    color: #1976d2;
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #1976d2;
    transition: width 0.3s ease;
}

.nav a:hover::after {
    width: 100%;
}

/* 下拉菜单样式 */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-content {
    display: none;
    position: absolute;
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    min-width: 160px;
    box-shadow: 0 8px 16px rgba(0,0,0,0.1);
    border-radius: 8px;
    z-index: 1;
    overflow: hidden;
    transform: translateY(10px);
    opacity: 0;
    transition: all 0.3s ease;
}

.dropdown:hover .dropdown-content {
    display: block;
    transform: translateY(0);
    opacity: 1;
}

.dropdown-content a {
    color: #333;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
    transition: background-color 0.2s;
}

.dropdown-content a:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

/* 英雄区域样式 */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, rgba(25, 118, 210, 0.1) 0%, rgba(21, 101, 192, 0.2) 100%);
    text-align: center;
    color: #333;
}

.hero-content h2 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #1976d2, #1565c0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-content p {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    color: #666;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-primary {
    background: linear-gradient(135deg, #1976d2, #1565c0);
    color: white;
    box-shadow: 0 4px 15px rgba(25, 118, 210, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(25, 118, 210, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.9);
    color: #1976d2;
    border: 1px solid rgba(25, 118, 210, 0.2);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(25, 118, 210, 0.1);
    transform: translateY(-1px);
}

/* 章节标题样式 */
.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: #333;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(135deg, #1976d2, #1565c0);
}

/* 培训模块网格样式 */
.modules {
    padding: 80px 0;
    background: rgba(255, 255, 255, 0.8);
}

.module-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.module-card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    padding: 2rem;
    text-align: center;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.module-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(135deg, #1976d2, #1565c0);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

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

.module-card:hover::before {
    transform: scaleX(1);
}

.module-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #1976d2, #1565c0);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    margin: 0 auto 1.5rem;
    box-shadow: 0 4px 15px rgba(25, 118, 210, 0.3);
}

.module-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #333;
}

.module-card p {
    color: #666;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

/* 关于我们和联系我们样式 */
.about, .contact {
    padding: 80px 0;
    background: rgba(255, 255, 255, 0.9);
}

.about-content, .contact-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-content p, .contact-content p {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 1rem;
    line-height: 1.8;
}

.contact-content p {
    font-size: 1.2rem;
}

/* 页脚样式 */
.footer {
    background: rgba(255, 255, 255, 0.95);
    padding: 2rem 0;
    text-align: center;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.footer p {
    color: #666;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav ul {
        gap: 1rem;
    }
    
    .hero-content h2 {
        font-size: 2.5rem;
    }
    
    .hero-content p {
        font-size: 1.1rem;
    }
    
    .module-grid {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .nav ul {
        flex-direction: column;
        text-align: center;
        gap: 0.5rem;
    }
    
    .hero-content h2 {
        font-size: 2rem;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
}

/* 卡片样式 */
.glassmorphism {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(16px);
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(31, 38, 135, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.4);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    margin: 0 auto;
    max-width: 800px;
    margin-bottom: 2rem;
}

.glassmorphism:hover {
    box-shadow: 0 15px 45px rgba(31, 38, 135, 0.15);
    transform: translateY(-3px);
}

/* 辅助类 */
.p-6 {
    padding: 1.5rem;
}

.mb-8 {
    margin-bottom: 2rem;
}

.flex {
    display: flex;
}

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

.items-center {
    align-items: center;
}

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

.mt-2 {
    margin-top: 0.5rem;
}

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

.module-card {
    animation: fadeInUp 0.6s ease forwards;
}

.module-card:nth-child(1) { animation-delay: 0.1s; }
.module-card:nth-child(2) { animation-delay: 0.2s; }
.module-card:nth-child(3) { animation-delay: 0.3s; }
.module-card:nth-child(4) { animation-delay: 0.4s; }
.module-card:nth-child(5) { animation-delay: 0.5s; }
.module-card:nth-child(6) { animation-delay: 0.6s; }
.module-card:nth-child(7) { animation-delay: 0.7s; }
.module-card:nth-child(8) { animation-delay: 0.8s; }
.module-card:nth-child(9) { animation-delay: 0.9s; }
.module-card:nth-child(10) { animation-delay: 1.0s; }
.module-card:nth-child(11) { animation-delay: 1.1s; }
.module-card:nth-child(12) { animation-delay: 1.2s; }

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

::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.05);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #1976d2, #1565c0);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #1565c0, #0d47a1);
}