.dl-hero {
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #0f2027 0%, #203a43 50%, #2c5364 100%);
    padding: var(--space-5xl) 0 var(--space-4xl);
}
.dl-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 600px 400px at 20% 50%, rgba(76, 175, 80, 0.15), transparent),
        radial-gradient(ellipse 500px 350px at 80% 30%, rgba(33, 150, 243, 0.12), transparent),
        radial-gradient(ellipse 400px 300px at 60% 80%, rgba(255, 193, 7, 0.08), transparent);
    pointer-events: none;
}
.dl-hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    pointer-events: none;
}
.dl-hero .container { position: relative; z-index: 1; }
.dl-hero-content {
    max-width: 720px;
    margin: 0 auto;
    text-align: center;
}
.dl-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-lg);
    background: rgba(76, 175, 80, 0.15);
    border: 1px solid rgba(76, 175, 80, 0.3);
    border-radius: var(--radius-full);
    color: #81c784;
    font-size: var(--font-size-sm);
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: var(--space-lg);
    backdrop-filter: blur(8px);
}
.dl-badge i { font-size: 0.85em; }
.dl-hero h1 {
    font-size: clamp(var(--font-size-3xl), 5vw, var(--font-size-5xl));
    font-weight: 800;
    color: #fff;
    line-height: 1.15;
    margin-bottom: var(--space-md);
}
.dl-hero h1 .accent {
    background: linear-gradient(135deg, #4CAF50, #66bb6a, #81c784);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.dl-hero-sub {
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--font-size-lg);
    line-height: 1.6;
    margin-bottom: var(--space-2xl);
}
.dl-hero-sub strong { color: #fff; }
.dl-meta-row {
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
    flex-wrap: wrap;
    margin-bottom: var(--space-2xl);
}
.dl-meta-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: rgba(255, 255, 255, 0.6);
    font-size: var(--font-size-sm);
}
.dl-meta-item i {
    color: var(--primary-color);
    font-size: 0.9em;
}
.dl-hero-actions {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}
.dl-section {
    padding: var(--space-4xl) 0;
    background: var(--bg-secondary);
}
.dl-card {
    max-width: 960px;
    margin: 0 auto;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-large);
}
.dl-card-header {
    padding: var(--space-2xl) var(--space-2xl) var(--space-xl);
    border-bottom: 1px solid var(--border-color);
    background: linear-gradient(135deg, rgba(76, 175, 80, 0.04), rgba(33, 150, 243, 0.03));
}
.dl-card-header-top {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    margin-bottom: var(--space-md);
}
.dl-file-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #4CAF50, #2E7D32);
    border-radius: var(--radius-lg);
    color: #fff;
    font-size: var(--font-size-xl);
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(76, 175, 80, 0.3);
}
.dl-card-header h2 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-dark);
    line-height: 1.3;
}
.dl-card-header p {
    color: var(--text-light);
    font-size: var(--font-size-base);
    line-height: 1.6;
}
.dl-card-body { padding: var(--space-2xl); }
.dl-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-md);
    margin-bottom: var(--space-2xl);
}
.dl-feature {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    transition: all 0.25s ease;
}
.dl-feature:hover {
    border-color: var(--primary-color);
    background: rgba(76, 175, 80, 0.05);
    transform: translateY(-1px);
}
.dl-feature-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(76, 175, 80, 0.1);
    border-radius: var(--radius-sm);
    color: var(--primary-color);
    font-size: var(--font-size-sm);
    flex-shrink: 0;
}
.dl-feature span {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-dark);
}
.dl-download-area {
    text-align: center;
    padding: var(--space-2xl);
    background: linear-gradient(135deg, rgba(76, 175, 80, 0.06), rgba(33, 150, 243, 0.04));
    border-radius: var(--radius-lg);
    border: 1px dashed rgba(76, 175, 80, 0.3);
    margin-bottom: var(--space-2xl);
}
.dl-download-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-lg) var(--space-3xl);
    background: linear-gradient(135deg, #4CAF50, #43a047);
    color: #fff;
    font-size: var(--font-size-lg);
    font-weight: 700;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(76, 175, 80, 0.35);
    position: relative;
    overflow: hidden;
}
.dl-download-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.2), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}
.dl-download-btn:hover::before { opacity: 1; }
.dl-download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(76, 175, 80, 0.45);
}
.dl-download-btn:active {
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(76, 175, 80, 0.35);
}
.dl-download-btn i {
    font-size: 1.3em;
    animation: dl-pulse 2s ease-in-out infinite;
}
@keyframes dl-pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.15); }
}
.dl-download-sub {
    margin-top: var(--space-md);
    font-size: var(--font-size-sm);
    color: var(--text-light);
}
.dl-download-sub i { color: var(--primary-color); margin-right: 4px; }
.dl-preview {
    margin-bottom: var(--space-2xl);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-medium);
}
.dl-preview-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: background 0.2s ease;
    user-select: none;
}
.dl-preview-bar:hover { background: var(--border-color); }
.dl-preview-bar-left {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-dark);
}
.dl-preview-bar-left i { color: var(--primary-color); }
.dl-preview-bar-right {
    font-size: var(--font-size-xs);
    color: var(--text-light);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}
.dl-preview-bar-right .dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary-color);
    animation: dl-blink 1.5s ease-in-out infinite;
}
@keyframes dl-blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}
.hero-btn-outline {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    background: rgba(255,255,255,0.1);
    color: #fff;
    font-size: var(--font-size-base);
    font-weight: 600;
    border: 2px solid rgba(255,255,255,0.3);
    border-radius: var(--radius-lg);
    text-decoration: none;
    transition: all 0.3s ease;
    backdrop-filter: blur(4px);
}
.hero-btn-outline:hover {
    background: rgba(255,255,255,0.2);
    border-color: #fff;
    transform: translateY(-2px);
}
.hero-btn-solid {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    background: linear-gradient(135deg, #4CAF50, #2E7D32);
    color: #fff;
    font-size: var(--font-size-base);
    font-weight: 700;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 14px rgba(76,175,80,0.35);
}
.hero-btn-solid:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(76,175,80,0.5);
}
.dl-preview object {
    width: 100%;
    height: 600px;
    border: none;
    display: block;
    background: #f5f5f5;
}
.dl-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}
.dl-nav-btn {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-lg) var(--space-xl);
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}
.dl-nav-btn::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}
.dl-nav-btn:hover::after { transform: scaleX(1); }
.dl-nav-btn:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}
.dl-nav-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(76, 175, 80, 0.1);
    border-radius: var(--radius-md);
    color: var(--primary-color);
    font-size: var(--font-size-base);
    flex-shrink: 0;
    transition: all 0.3s ease;
}
.dl-nav-btn:hover .dl-nav-icon {
    background: var(--primary-color);
    color: #fff;
}
.dl-nav-text { flex: 1; }
.dl-nav-label {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 2px;
}
.dl-nav-title {
    display: block;
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-dark);
    transition: color 0.3s ease;
}
.dl-nav-btn:hover .dl-nav-title { color: var(--primary-color); }
.dl-nav-arrow {
    color: var(--text-light);
    transition: all 0.3s ease;
}
.dl-nav-btn:hover .dl-nav-arrow {
    color: var(--primary-color);
    transform: translateX(3px);
}
.dl-nav-btn.back .dl-nav-arrow {
    transform: translateX(-3px);
}
.dl-nav-btn.back:hover .dl-nav-arrow {
    transform: translateX(-6px);
}
@media (max-width: 768px) {
    .dl-hero { padding: var(--space-3xl) 0 var(--space-2xl); }
    .dl-meta-row { gap: var(--space-md); }
    .dl-card-header { padding: var(--space-xl); }
    .dl-card-body { padding: var(--space-xl); }
    .dl-download-area { padding: var(--space-xl); }
    .dl-download-btn {
        padding: var(--space-md) var(--space-2xl);
        font-size: var(--font-size-base);
    }
    .dl-preview object { height: 400px; }
    .dl-nav { grid-template-columns: 1fr; }
    .dl-features { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
    .dl-hero { padding: var(--space-2xl) 0 var(--space-xl); }
    .dl-hero h1 { font-size: var(--font-size-2xl); }
    .dl-hero-sub { font-size: var(--font-size-base); }
    .dl-meta-row { gap: var(--space-sm); flex-direction: column; align-items: center; }
    .dl-preview object { height: 300px; }
    .dl-card-header-top { flex-direction: column; text-align: center; }
    .dl-hero-actions { flex-direction: column; align-items: center; }
}