/* 简约白 - Download页面样式 */
body {
    background: #f8f9fa !important;
}
.content-wrapper {
    padding: 30px 0;
}
.card {
    background: #ffffff;
    border: 1px solid #e9ecef;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    margin-bottom: 20px;
    transition: all 0.3s ease;
}
.card:hover {
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
    transform: translateY(-2px);
}
.card-header {
    background: #ffffff;
    border-bottom: 1px solid #e9ecef;
    padding: 20px 24px;
}
.card-title {
    font-size: 16px;
    font-weight: 600;
    color: #212529;
    margin: 0;
}
.card-title i {
    color: #495057;
    margin-right: 8px;
}
.card-block {
    padding: 24px;
}
.btn-success {
    background: #212529;
    border: none;
    padding: 12px 28px;
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.3s;
}
.btn-success:hover {
    background: #000000;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}
.form-control {
    border: 1px solid #dee2e6;
    border-radius: 8px;
    padding: 12px 16px;
}
.form-control:focus {
    border-color: #212529;
    box-shadow: 0 0 0 3px rgba(33,37,41,0.1);
}
.site-button {
    background: #ffffff;
    border: 1px solid #dee2e6;
    padding: 12px 20px;
    margin: 6px;
    border-radius: 8px;
    color: #495057;
    font-size: 14px;
    transition: all 0.3s;
    display: inline-block;
}
.site-button:hover {
    background: #f8f9fa;
    border-color: #212529;
    color: #212529;
    text-decoration: none;
    transform: translateY(-1px);
}
/* 修复input-group高度对齐 */
.input-group { 
    align-items: stretch; 
}
.input-group .form-control,
.input-group-append .btn-success { 
    height: 48px; 
    display: flex; 
    align-items: center; 
}