:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #f59e0b;
    --dark: #1e293b;
    --light: #f8fafc;
    --gray: #94a3b8;
    --dark-gray: #64748b;
}

body {
    font-family: 'Helvetica Neue', Arial, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    color: var(--dark);
    line-height: 1.6;
    background-color: #f1f5f9;
}

.container3 {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* 一级导航 */
.navbar {
    background-color: white;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 50;
}

.navbar-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

.navbar-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    display: flex;
    align-items: center;
}

.navbar-logo i {
    margin-right: 0.5rem;
    color: var(--secondary);
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--dark);
    font-weight: 500;
    transition: color 0.2s;
    position: relative;
}

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

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

.nav-link.active:after  {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary);
}

/* Banner区域 */
.banner {
    background: linear-gradient(135deg, #2563eb, #3b82f6);
    color: white;
    padding: 1rem 0;
    margin-bottom: 2rem;
    position: relative;
    overflow: hidden;
}

.banner-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding-top: 60px;
}

.banner-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.banner-desc {
    font-size: 1.25rem;
    max-width: 800px;
    margin: 0 auto 2rem;
    opacity: 0.9;
}

/* 二级导航 */
.subnav {
    background-color: white;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    margin-top: -1rem;
    position: relative;
    z-index: 10;
}

.subnav-container {
    display: flex;
    overflow-x: auto;
    padding: 0.5rem 0;
    scrollbar-width: none;
}

.subnav-container::-webkit-scrollbar {
    display: none;
}

.subnav-link {
    padding: 0.75rem 1.5rem;
    white-space: nowrap;
    font-weight: 700;
    color: #0d1318;
    border-radius: 9999px;
    transition: all 0.2s;
    margin: 0 0.25rem;
    font-size: 16px;

}

.subnav-link:hover, .subnav-link.active  {
    background-color: #e0e7ff;
    color: var(--primary);
}

/* 软件列表 */
.software-list {
    margin-top: 2rem;
}

.software-card {
    background-color: white;
    border-radius: 0.5rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    transition: transform 0.2s, box-shadow 0.2s;
    display: flex;
    align-items: center;
}

.software-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1);
}

.software-icon {
    width: 64px;
    height: 64px;
    background-color: #e0e7ff;
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 1.5rem;
    color: var(--primary);
    font-size: 1.5rem;
    flex-shrink: 0;
}

.software-content {
    flex-grow: 1;
}

.software-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--dark);
}

.software-meta {
    display: flex;
    align-items: center;
    margin-bottom: 0.75rem;
    color: var(--dark-gray);
    font-size: 0.875rem;
}

.software-meta span {
    margin-right: 1rem;
    display: flex;
    align-items: center;
}

.software-meta i {
    margin-right: 0.25rem;
    font-size: 0.75rem;
}

.software-desc {
    color: var(--dark-gray);
    margin-bottom: 1rem;
    line-height: 1.5;
}

.software-actions {
    display: flex;
    gap: 1rem;
}

.btn {
    padding: 0.5rem 1.25rem;
    border-radius: 0.375rem;
    font-weight: 500;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-primary {
    background-color: var(--primary);
    color: white;
    border: 1px solid var(--primary);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
}

.btn-outline:hover {
    background-color: #e0e7ff;
}

.btn i {
    margin-right: 0.5rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar-container {
        height: 56px;
    }

    .nav-links {
        gap: 1rem;
    }

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

    .banner-desc {
        font-size: 1rem;
    }

    .software-card {
        flex-direction: column;
        align-items: flex-start;
    }

    .software-icon {
        margin-right: 0;
        margin-bottom: 1rem;
    }

    .software-actions {
        width: 100%;
        justify-content: space-between;
    }

    .btn {
        width: 100%;
    }
}

/* 搜索框样式 */
.search-container {
    position: relative;
    width: 250px;
    margin-right: 20px;
    margin-left: 50px;
}

.search-input {
    width: 100%;
    padding: 0.5rem 1rem 0.5rem 2.5rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    font-size: 0.875rem;
    transition: all 0.2s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 58%;
    transform: translateY(-50%);
    color: var(--light-text);
}