/* ========================================
   WolfShort.ai - AI短剧全流程工作流官网
   高端科技风格 · 深色主题
   ======================================== */

/* CSS Variables */
:root {
    /* Colors - 高端科技配色 */
    --color-bg-primary: #0A0E17;
    --color-bg-secondary: #0F1420;
    --color-bg-card: rgba(255, 255, 255, 0.03);
    --color-bg-card-hover: rgba(255, 255, 255, 0.06);
    
    --color-text-primary: #FFFFFF;
    --color-text-secondary: #B4C5E4;
    --color-text-muted: #6B7A99;
    
    --color-accent-primary: #00D4AA;
    --color-accent-secondary: #4361EE;
    --color-accent-warning: #FF9F1C;
    --color-accent-human: #FFD700;
    --color-accent-final: #00D4AA;
    
    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-hover: rgba(255, 255, 255, 0.15);
    
    /* Typography */
    --font-primary: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 20px rgba(0, 212, 170, 0.3);
}

/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-base);
}

/* Container */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ========================================
   Navigation
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--spacing-md) 0;
    background: transparent;
    transition: var(--transition-base);
}

.navbar.scrolled {
    background: rgba(10, 14, 23, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-xl);
    font-weight: 700;
}

.logo-icon {
    color: var(--color-accent-primary);
    font-size: var(--font-size-2xl);
}

.logo-text {
    color: var(--color-text-primary);
}

.logo-dot {
    color: var(--color-accent-primary);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
    list-style: none;
}

.nav-link {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    position: relative;
    padding: var(--spacing-xs) 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent-primary);
    transition: var(--transition-base);
}

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

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.hamburger,
.hamburger::before,
.hamburger::after {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    transition: var(--transition-base);
}

.hamburger {
    position: relative;
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    left: 0;
}

.hamburger::before {
    top: -7px;
}

.hamburger::after {
    top: 7px;
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to right,
        rgba(10, 14, 23, 0.95) 0%,
        rgba(10, 14, 23, 0.8) 50%,
        rgba(10, 14, 23, 0.6) 100%
    );
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    padding: var(--spacing-3xl) var(--spacing-lg);
    text-align: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(0, 212, 170, 0.1);
    border: 1px solid rgba(0, 212, 170, 0.3);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    color: var(--color-accent-primary);
    margin-bottom: var(--spacing-lg);
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
}

.text-gradient {
    background: linear-gradient(90deg, var(--color-accent-primary), #FFFFFF);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-2xl);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-base);
}

.btn-primary {
    background: var(--color-accent-primary);
    color: var(--color-bg-primary);
    border: none;
}

.btn-primary:hover {
    background: #00E8BB;
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

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

.btn-outline:hover {
    background: var(--color-bg-card);
    border-color: var(--color-accent-primary);
}

/* Hero Stats */
.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(10px);
}

.stat-item {
    text-align: center;
}

.stat-value {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--color-accent-primary);
}

.stat-suffix {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--color-accent-primary);
}

.stat-label {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-top: var(--spacing-xs);
}

.stat-divider {
    width: 1px;
    height: 50px;
    background: var(--color-border);
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

/* ========================================
   Section Styles
   ======================================== */
.section {
    padding: var(--spacing-3xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--color-accent-primary);
    margin-bottom: var(--spacing-md);
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.section-desc {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   Overview Section - Pipeline
   ======================================== */
.overview {
    background: var(--color-bg-secondary);
}

.pipeline-wrapper {
    position: relative;
    padding: var(--spacing-xl) 0;
    overflow-x: auto;
}

.pipeline-line {
    position: absolute;
    top: 50%;
    left: 5%;
    right: 5%;
    height: 2px;
    background: var(--color-border);
    transform: translateY(-50%);
}

.pipeline-steps {
    display: flex;
    justify-content: space-between;
    position: relative;
    min-width: 900px;
    padding: 0 var(--spacing-md);
}

.pipeline-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    width: 100px;
    position: relative;
    z-index: 1;
}

.step-icon {
    width: 70px;
    height: 70px;
    background: var(--color-bg-primary);
    border: 2px solid var(--color-accent-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-2xl);
    color: var(--color-accent-secondary);
    margin-bottom: var(--spacing-md);
    position: relative;
    transition: var(--transition-base);
}

.step-icon:hover {
    transform: scale(1.1);
    box-shadow: 0 0 20px rgba(67, 97, 238, 0.4);
}

.step-icon.human {
    border-color: var(--color-accent-human);
    color: var(--color-accent-human);
}

.step-icon.final {
    border-color: var(--color-accent-final);
    color: var(--color-accent-final);
}

.human-badge {
    position: absolute;
    top: -5px;
    right: -5px;
    width: 22px;
    height: 22px;
    background: var(--color-accent-human);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    color: var(--color-bg-primary);
    border: 2px solid var(--color-bg-primary);
}

.step-content h4 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.step-content p {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    line-height: 1.4;
}

/* Legend */
.legend-bar {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    width: fit-content;
    margin-left: auto;
    margin-right: auto;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.legend-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.legend-dot.ai { background: var(--color-accent-secondary); }
.legend-dot.human { background: var(--color-accent-human); }
.legend-dot.final { background: var(--color-accent-final); }

/* ========================================
   Modules Section
   ======================================== */
.modules {
    background: var(--color-bg-primary);
}

.module-block {
    margin-bottom: var(--spacing-3xl);
    padding-bottom: var(--spacing-3xl);
    border-bottom: 1px solid var(--color-border);
}

.module-block:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.module-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.module-number {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    color: var(--color-accent-primary);
    opacity: 0.3;
    line-height: 1;
}

.module-title-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.module-name {
    font-size: var(--font-size-2xl);
    font-weight: 700;
}

.module-subtitle {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
}

/* Sub-module */
.sub-module {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
    margin-bottom: var(--spacing-2xl);
}

.sub-module.reverse {
    direction: rtl;
}

.sub-module.reverse > * {
    direction: ltr;
}

.sub-module:last-child {
    margin-bottom: 0;
}

.sub-module-visual {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
}

.sub-module-visual img {
    width: 100%;
    height: 350px;
    object-fit: cover;
    transition: var(--transition-slow);
}

.sub-module-visual:hover img {
    transform: scale(1.03);
}

.visual-overlay {
    position: absolute;
    bottom: var(--spacing-md);
    left: var(--spacing-md);
    background: rgba(10, 14, 23, 0.9);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    backdrop-filter: blur(10px);
}

.tech-badge {
    font-family: 'Courier New', monospace;
    font-size: var(--font-size-xs);
    color: var(--color-accent-primary);
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.consistency-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: rgba(0, 212, 170, 0.1);
    border: 1px solid var(--color-accent-primary);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    color: var(--color-accent-primary);
    font-weight: 600;
    font-size: var(--font-size-sm);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.status-badges {
    position: absolute;
    top: var(--spacing-md);
    left: var(--spacing-md);
    display: flex;
    gap: var(--spacing-xs);
}

.status-badge {
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.status-badge.online i { color: var(--color-accent-primary); }
.status-badge.rendering i { color: var(--color-accent-secondary); }

.sub-module-info h4 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-primary);
}

/* Feature List */
.feature-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.feature-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    border-left: 3px solid var(--color-accent-secondary);
    transition: var(--transition-base);
}

.feature-item:hover {
    background: var(--color-bg-card-hover);
    transform: translateX(5px);
}

.feature-item i {
    font-size: var(--font-size-xl);
    color: var(--color-accent-secondary);
    flex-shrink: 0;
    margin-top: 2px;
}

.feature-item h5 {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.feature-item p {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* Audio Features */
.audio-features .feature-item {
    border-left-color: #D946EF;
}

.audio-features .feature-item i {
    color: #D946EF;
}

/* Tech Cards */
.tech-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.tech-cards.horizontal {
    grid-template-columns: repeat(3, 1fr);
}

.tech-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: var(--transition-base);
}

.tech-card:hover {
    background: var(--color-bg-card-hover);
    border-color: var(--color-accent-secondary);
    transform: translateY(-3px);
}

.tech-card i {
    font-size: var(--font-size-2xl);
    color: var(--color-accent-secondary);
    margin-bottom: var(--spacing-md);
}

.tech-card.orange i {
    color: var(--color-accent-warning);
}

.tech-card.orange:hover {
    border-color: var(--color-accent-warning);
}

.tech-card h5 {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.tech-card p {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* Efficiency Badge */
.efficiency-badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    background: linear-gradient(90deg, rgba(0, 212, 170, 0.1), transparent);
    border-left: 4px solid var(--color-accent-primary);
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}

.efficiency-value {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--color-accent-primary);
}

.efficiency-text {
    display: flex;
    flex-direction: column;
}

.efficiency-text span {
    font-weight: 600;
}

.efficiency-text small {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* Color Palette */
.color-palette {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.palette-swatch {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Process Steps */
.process-steps {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.process-step {
    display: flex;
    gap: var(--spacing-md);
    position: relative;
}

.process-step::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 40px;
    bottom: -20px;
    width: 2px;
    background: rgba(67, 97, 238, 0.3);
}

.process-step:last-child::before {
    display: none;
}

.step-num {
    width: 32px;
    height: 32px;
    background: var(--color-accent-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: var(--font-size-sm);
    flex-shrink: 0;
}

.step-info h5 {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.step-info p {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* QC Stages */
.qc-stages {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.qc-stage {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--color-accent-primary);
    transition: var(--transition-base);
}

.qc-stage:hover {
    background: var(--color-bg-card-hover);
}

.qc-icon {
    width: 50px;
    height: 50px;
    background: rgba(0, 212, 170, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent-primary);
    font-size: var(--font-size-xl);
    flex-shrink: 0;
}

.qc-content h5 {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.qc-content p {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* Trace Items */
.trace-items {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    position: relative;
}

.trace-item {
    display: flex;
    gap: var(--spacing-md);
    position: relative;
    padding-left: var(--spacing-lg);
}

.trace-item::before {
    content: '';
    position: absolute;
    left: 4px;
    top: 0;
    bottom: -20px;
    width: 2px;
    background: rgba(67, 97, 238, 0.3);
}

.trace-item:last-child::before {
    display: none;
}

.trace-dot {
    position: absolute;
    left: 0;
    top: 25px;
    width: 10px;
    height: 10px;
    background: var(--color-accent-secondary);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--color-accent-secondary);
}

.trace-content {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    flex: 1;
}

.trace-content h5 {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.trace-content h5 i {
    color: var(--color-accent-secondary);
}

.trace-content p {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ========================================
   Tech Stack Section
   ======================================== */
.tech {
    background: var(--color-bg-secondary);
}

.tech-visual {
    margin-bottom: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    overflow: hidden;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
}

.tech-visual img {
    width: 100%;
    height: 400px;
    object-fit: cover;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.tech-category {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: var(--transition-base);
}

.tech-category:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-3px);
}

.category-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

.tech-category.llm .category-header { color: #4CC9F0; }
.tech-category.image .category-header { color: #F72585; }
.tech-category.video .category-header { color: #4361EE; }
.tech-category.audio .category-header { color: #00D4AA; }

.category-items {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.tech-tag {
    background: rgba(255, 255, 255, 0.05);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* ========================================
   Contact Section
   ======================================== */
.contact {
    padding: 0;
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    min-height: 600px;
}

.contact-content {
    display: flex;
    align-items: center;
    padding: var(--spacing-3xl);
    background: var(--color-bg-primary);
}

.contact-info {
    max-width: 500px;
}

.contact-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

.contact-subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-2xl);
}

.contact-cards {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
}

.contact-card:hover {
    border-color: var(--color-accent-primary);
}

.contact-card .card-icon {
    width: 50px;
    height: 50px;
    background: rgba(67, 97, 238, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent-secondary);
    font-size: var(--font-size-xl);
}

.contact-card .card-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.contact-card .card-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    letter-spacing: 1px;
}

.contact-card .card-value {
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.contact-visual {
    position: relative;
    overflow: hidden;
}

.contact-visual img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.contact-visual .visual-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, var(--color-bg-primary) 0%, transparent 50%);
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--color-bg-secondary);
    padding: 20px 0;
    border-top: 1px solid var(--color-border);
}

.footer-content {
    text-align: center;
}

.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.footer-text {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.footer-copyright {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* ========================================
   Animations
   ======================================== */
.animate-fade-in {
    opacity: 0;
    animation: fadeIn 0.6s ease forwards;
}

.animate-fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.6s ease forwards;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }
.delay-3 { animation-delay: 0.6s; }

@keyframes fadeIn {
    to { opacity: 1; }
}

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

/* Scroll Animations */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .sub-module {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .sub-module.reverse {
        direction: ltr;
    }
    
    .tech-cards {
        grid-template-columns: 1fr;
    }
    
    .tech-cards.horizontal {
        grid-template-columns: 1fr;
    }
    
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
    
    .contact-visual {
        height: 300px;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-3xl: 4rem;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background: var(--color-bg-secondary);
        flex-direction: column;
        padding: var(--spacing-3xl) var(--spacing-lg);
        gap: var(--spacing-lg);
        transition: var(--transition-base);
        border-left: 1px solid var(--color-border);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active .hamburger {
        background: transparent;
    }
    
    .nav-toggle.active .hamburger::before {
        top: 0;
        transform: rotate(45deg);
    }
    
    .nav-toggle.active .hamburger::after {
        top: 0;
        transform: rotate(-45deg);
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .stat-divider {
        width: 50px;
        height: 1px;
    }
    
    .pipeline-wrapper {
        overflow-x: auto;
        padding-bottom: var(--spacing-md);
    }
    
    .pipeline-steps {
        min-width: 800px;
    }
    
    .legend-bar {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .module-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
    
    .module-number {
        font-size: var(--font-size-3xl);
    }
    
    .tech-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        padding: var(--spacing-2xl) var(--spacing-lg);
    }
    
    .sub-module-visual img {
        height: 280px;
    }
    
    .tech-visual img {
        height: 250px;
    }
}

@media (max-width: 480px) {
    .hero-cta {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .efficiency-badge {
        flex-direction: column;
        text-align: center;
    }
    
    .qc-stage {
        flex-direction: column;
    }
    
    .color-palette {
        justify-content: center;
    }
}