/**
 * 首页样式 - 现代科技风格
 */

/* ==================== Hero区域 ==================== */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #f5f7fa 0%, #e9ecef 100%);
}

/* 动态背景 */
.hero-bg-animation {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.3;
    z-index: 1;
}

/* Hero内容 */
.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 900px;
    padding: 0 var(--spacing-xl);
    animation: heroFadeIn 1s ease-out;
}

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

.hero-title {
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: var(--font-weight-black);
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
    letter-spacing: -2px;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.6;
}

/* Hero数据统计 */
.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
    flex-wrap: wrap;
}

.hero-stats .stat {
    text-align: center;
    animation: statFadeIn 0.8s ease-out backwards;
}

.hero-stats .stat:nth-child(1) { animation-delay: 0.2s; }
.hero-stats .stat:nth-child(2) { animation-delay: 0.4s; }
.hero-stats .stat:nth-child(3) { animation-delay: 0.6s; }

@keyframes statFadeIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.hero-stats .stat {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-black);
    color: var(--color-primary);
}

.hero-stats .stat span {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    margin-top: var(--spacing-xs);
}

/* Hero CTA按钮 */
.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.btn-hero-primary,
.btn-hero-secondary {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    border-radius: var(--radius-lg);
    text-decoration: none;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.btn-hero-primary {
    background: var(--color-primary);
    color: var(--color-secondary);
    box-shadow: var(--shadow-lg);
}

.btn-hero-primary:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-2xl);
}

.btn-hero-secondary {
    background: var(--color-secondary);
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
    box-shadow: var(--shadow-md);
}

.btn-hero-secondary:hover {
    transform: translateY(-4px);
    background: var(--color-primary);
    color: var(--color-secondary);
}

/* 滚动指示器 */
.hero-scroll-indicator {
    position: absolute;
    bottom: var(--spacing-2xl);
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    z-index: 2;
    animation: scrollBounce 2s infinite;
}

@keyframes scrollBounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(10px); }
}

.hero-scroll-indicator span {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.scroll-arrow {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
}

/* ==================== 功能特性区 ==================== */
.features-section {
    padding: var(--spacing-3xl) var(--spacing-xl);
    background: var(--color-bg);
}

.section-title {
    text-align: center;
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-black);
    color: var(--color-primary);
    margin-bottom: var(--spacing-2xl);
    letter-spacing: -1px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
    max-width: var(--container-max-width);
    margin: 0 auto;
}

.feature-card {
    background: var(--color-secondary);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), transparent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}

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

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-lg);
    display: inline-block;
    animation: iconFloat 3s ease-in-out infinite;
}

@keyframes iconFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.feature-card h3 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.feature-card p {
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
}

.feature-metric {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-primary);
    color: var(--color-secondary);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-bold);
}

/* ==================== 工作流程区 ==================== */
.workflow-section {
    padding: var(--spacing-3xl) var(--spacing-xl);
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
}

.workflow-timeline {
    max-width: 1000px;
    margin: 0 auto;
    position: relative;
}

.workflow-timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--color-border);
    transform: translateX(-50%);
}

.workflow-step {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-3xl);
    position: relative;
}

.workflow-step:nth-child(even) {
    flex-direction: row-reverse;
}

.workflow-step-content {
    flex: 1;
    background: var(--color-secondary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.workflow-step:nth-child(odd) .workflow-step-content {
    margin-right: var(--spacing-2xl);
}

.workflow-step:nth-child(even) .workflow-step-content {
    margin-left: var(--spacing-2xl);
}

.workflow-step-content:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.workflow-step-number {
    width: 48px;
    height: 48px;
    background: var(--color-primary);
    color: var(--color-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-xl);
    position: relative;
    z-index: 2;
    box-shadow: var(--shadow-md);
}

.workflow-step-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.workflow-step-time {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--color-bg-secondary);
    color: var(--color-text-secondary);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
}

/* ==================== AI服务展示 ==================== */
.ai-services-section {
    padding: var(--spacing-3xl) var(--spacing-xl);
    background: var(--color-primary);
    color: var(--color-secondary);
}

.ai-services-section .section-title {
    color: var(--color-secondary);
}

.ai-logos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--spacing-xl);
    max-width: var(--container-max-width);
    margin: 0 auto;
}

.ai-logo-item {
    background: rgba(255, 255, 255, 0.1);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-base);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.ai-logo-item:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-4px);
}

.ai-logo-item img {
    width: 64px;
    height: 64px;
    object-fit: contain;
    margin-bottom: var(--spacing-md);
    filter: brightness(0) invert(1);
}

.ai-logo-item span {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
}

/* ==================== 响应式 ==================== */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .workflow-timeline::before {
        left: 24px;
    }
    
    .workflow-step {
        flex-direction: row !important;
    }
    
    .workflow-step-content {
        margin-left: var(--spacing-2xl) !important;
        margin-right: 0 !important;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: var(--font-size-4xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-xl);
    }
    
    .hero-stats {
        gap: var(--spacing-lg);
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .ai-logos-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}