/* 机器学习平台主页样式 - 企业级高端设计 */

/* Hero Section */
.ml-hero {
    min-height: 100vh;
    background: linear-gradient(135deg, #000000 0%, #1a1a2e 30%, #16213e 60%, #0f3460 100%);
    position: relative;
    overflow: hidden;
    padding: 120px 0 80px;
    display: flex;
    align-items: center;
}

.ml-hero-pattern {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 30%, rgba(0, 122, 255, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(88, 86, 214, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(255, 59, 48, 0.05) 0%, transparent 60%);
    pointer-events: none;
}

.ml-hero-pattern::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: 
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 2px,
            rgba(255, 255, 255, 0.03) 2px,
            rgba(255, 255, 255, 0.03) 4px
        );
    animation: mlGridMove 25s linear infinite;
}

@keyframes mlGridMove {
    0% {
        transform: translate(0, 0);
    }
    100% {
        transform: translate(0, 100px);
    }
}

.ml-hero-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
    align-items: center;
}

.ml-hero-content {
    animation: fadeInUp 0.8s ease-out;
}

.ml-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(0, 122, 255, 0.1);
    border: 1px solid rgba(0, 122, 255, 0.3);
    border-radius: 50px;
    color: var(--primary-color);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: var(--spacing-lg);
    backdrop-filter: blur(10px);
}

.ml-hero-badge svg {
    width: 16px;
    height: 16px;
}

.ml-hero-title {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.title-primary {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.title-gradient {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 600;
    background: linear-gradient(135deg, #007AFF 0%, #5856D6 50%, #FF3B30 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.ml-hero-description {
    font-size: clamp(1rem, 2vw, 1.125rem);
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 540px;
    margin-bottom: var(--spacing-xl);
}

.ml-hero-stats {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.ml-stat-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.ml-stat-number {
    font-size: clamp(2rem, 3vw, 2.5rem);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
}

.ml-stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.ml-stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border-color);
}

.ml-hero-actions {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.ml-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.ml-btn-primary {
    background: var(--primary-color);
    color: white;
}

.ml-btn-primary:hover {
    background: #0056CC;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 122, 255, 0.4);
}

.ml-btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
}

.ml-btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--border-light);
    transform: translateY(-2px);
}

.ml-btn-large {
    padding: var(--spacing-lg) var(--spacing-xxl);
    font-size: 1.125rem;
}

.ml-btn svg {
    width: 20px;
    height: 20px;
}

/* Hero Visual */
.ml-hero-visual {
    position: relative;
    height: 500px;
    animation: fadeInRight 0.8s ease-out 0.2s both;
}

.ml-visual-container {
    position: relative;
    width: 100%;
    height: 100%;
    border-radius: var(--radius-lg);
    background: rgba(28, 28, 30, 0.5);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    padding: var(--spacing-lg);
    overflow: hidden;
}

.ml-visual-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    height: 100%;
}

.ml-grid-item {
    background: linear-gradient(135deg, rgba(0, 122, 255, 0.1) 0%, rgba(88, 86, 214, 0.1) 100%);
    border: 1px solid rgba(0, 122, 255, 0.2);
    border-radius: var(--radius-md);
    position: relative;
    overflow: hidden;
}

.ml-grid-item:nth-child(1),
.ml-grid-item:nth-child(5),
.ml-grid-item:nth-child(9) {
    animation: mlPulse 3s ease-in-out infinite;
    animation-delay: 0s;
}

.ml-grid-item:nth-child(2),
.ml-grid-item:nth-child(6),
.ml-grid-item:nth-child(7) {
    animation: mlPulse 3s ease-in-out infinite;
    animation-delay: 1s;
}

.ml-grid-item:nth-child(3),
.ml-grid-item:nth-child(4),
.ml-grid-item:nth-child(8) {
    animation: mlPulse 3s ease-in-out infinite;
    animation-delay: 2s;
}

@keyframes mlPulse {
    0%, 100% {
        opacity: 0.4;
        transform: scale(1);
    }
    50% {
        opacity: 1;
        transform: scale(1.02);
    }
}

.ml-visual-pulse {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 200px;
    border: 2px solid rgba(0, 122, 255, 0.3);
    border-radius: 50%;
    animation: mlRipple 2s ease-out infinite;
}

@keyframes mlRipple {
    0% {
        width: 200px;
        height: 200px;
        opacity: 1;
    }
    100% {
        width: 400px;
        height: 400px;
        opacity: 0;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Features Section */
.ml-features {
    padding: var(--spacing-xxl) 0;
    background: var(--background-primary);
}

.ml-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.ml-section-header {
    text-align: center;
    margin-bottom: var(--spacing-xxl);
}

.ml-section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.ml-section-subtitle {
    font-size: clamp(1rem, 2vw, 1.125rem);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.ml-features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.ml-feature-card {
    background: var(--background-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.ml-feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

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

.ml-feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-heavy);
    border-color: var(--border-light);
}

.ml-feature-icon {
    width: 64px;
    height: 64px;
    background: rgba(0, 122, 255, 0.1);
    border: 1px solid rgba(0, 122, 255, 0.2);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
    color: var(--primary-color);
    transition: all 0.3s ease;
}

.ml-feature-card:hover .ml-feature-icon {
    background: rgba(0, 122, 255, 0.2);
    transform: scale(1.1);
}

.ml-feature-icon svg {
    width: 32px;
    height: 32px;
}

.ml-feature-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
}

.ml-feature-description {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
    font-size: 1rem;
}

.ml-feature-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.ml-feature-list li {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    padding-left: var(--spacing-md);
    position: relative;
}

.ml-feature-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 600;
}

/* Technology Stack Section */
.ml-tech {
    padding: var(--spacing-xxl) 0;
    background: var(--background-secondary);
}

.ml-tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.ml-tech-item {
    background: var(--background-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    text-align: center;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.ml-tech-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
    border-color: var(--primary-color);
}

.ml-tech-icon {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
    background: rgba(0, 122, 255, 0.1);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    width: 100%;
}

.ml-tech-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* CTA Section */
.ml-cta {
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(135deg, #000000 0%, #1a1a2e 100%);
    position: relative;
    overflow: hidden;
}

.ml-cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 50% 50%, rgba(0, 122, 255, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

.ml-cta-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.ml-cta-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.ml-cta-description {
    font-size: clamp(1rem, 2vw, 1.125rem);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.ml-cta-actions {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.ml-btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-light);
}

.ml-btn-outline:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .ml-hero-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .ml-hero-visual {
        height: 400px;
    }
    
    .ml-features-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
}

@media (max-width: 768px) {
    .ml-hero {
        padding: 100px 0 60px;
        min-height: auto;
    }
    
    .ml-hero-container {
        padding: 0 var(--spacing-sm);
    }
    
    .ml-hero-stats {
        justify-content: space-around;
    }
    
    .ml-stat-divider {
        display: none;
    }
    
    .ml-hero-visual {
        height: 300px;
    }
    
    .ml-visual-grid {
        gap: var(--spacing-sm);
    }
    
    .ml-features {
        padding: var(--spacing-xl) 0;
    }
    
    .ml-features-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .ml-tech {
        padding: var(--spacing-xl) 0;
    }
    
    .ml-tech-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: var(--spacing-md);
    }
    
    .ml-cta {
        padding: var(--spacing-xl) 0;
    }
    
    .ml-hero-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .ml-btn {
        width: 100%;
        justify-content: center;
    }
    
    .ml-cta-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .ml-cta-actions .ml-btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .ml-container {
        padding: 0 var(--spacing-sm);
    }
    
    .ml-feature-card {
        padding: var(--spacing-lg);
    }
    
    .ml-tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .ml-hero-visual {
        height: 250px;
    }
}