/* ============================================
   YC INSULATION - Dark Tech Style
   科技感 · 视觉冲击 · 工业质感
   ============================================ */

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

:root {
    /* Dark Theme */
    --bg-dark: #0a0e17;
    --bg-darker: #050810;
    --bg-card: #0f1520;
    --bg-card-hover: #151c2a;
    
    /* Orange Accent (from business card) */
    --accent: #ff6b2c;
    --accent-light: #ff8a50;
    --accent-dark: #e55a1f;
    --accent-glow: rgba(255, 107, 44, 0.4);
    
    /* Cyan Tech */
    --cyan: #00d4ff;
    --cyan-glow: rgba(0, 212, 255, 0.3);
    
    /* Text */
    --text-primary: #ffffff;
    --text-secondary: #a0aec0;
    --text-muted: #5a6a7a;
    
    /* Gradients */
    --gradient-accent: linear-gradient(135deg, var(--accent), var(--accent-light));
    --gradient-dark: linear-gradient(180deg, var(--bg-darker), var(--bg-dark));
    --gradient-card: linear-gradient(145deg, var(--bg-card), var(--bg-darker));
    
    /* Shadows */
    --shadow-glow: 0 0 30px var(--accent-glow);
    --shadow-card: 0 10px 40px rgba(0, 0, 0, 0.5);
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', 'Segoe UI', -apple-system, sans-serif;
    line-height: 1.7;
    color: var(--text-primary);
    background: var(--bg-dark);
    overflow-x: hidden;
}

/* Selection */
::selection {
    background: var(--accent);
    color: var(--text-primary);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-darker);
}

::-webkit-scrollbar-thumb {
    background: var(--accent);
    border-radius: 4px;
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Section */
.section {
    padding: 120px 0;
    position: relative;
}

.section-title {
    text-align: center;
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--text-primary), var(--accent-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-title span {
    display: block;
    font-size: 14px;
    color: var(--text-muted);
    font-weight: 400;
    margin-top: 8px;
    letter-spacing: 4px;
    text-transform: uppercase;
    background: none;
    -webkit-text-fill-color: var(--text-muted);
}

/* ============================================
   Background Effects
   ============================================ */

/* Animated Background */
.bg-shapes {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
    overflow: hidden;
}

.bg-shapes::before {
    content: '';
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    top: -200px;
    right: -200px;
    animation: pulse-glow 8s ease-in-out infinite;
}

.bg-shapes::after {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--cyan-glow) 0%, transparent 70%);
    bottom: -150px;
    left: -150px;
    animation: pulse-glow 10s ease-in-out infinite reverse;
}

@keyframes pulse-glow {
    0%, 100% { opacity: 0.3; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(1.2); }
}

/* Grid Lines Background */
.grid-lines {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(var(--text-muted) 1px, transparent 1px),
        linear-gradient(90deg, var(--text-muted) 1px, transparent 1px);
    background-size: 50px 50px;
    opacity: 0.03;
    pointer-events: none;
}

/* ============================================
   Buttons
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 16px 40px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 15px;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-accent);
    color: var(--text-primary);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 50px var(--accent-glow);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-secondary {
    background: transparent;
    color: var(--accent);
    border: 2px solid var(--accent);
}

.btn-secondary:hover {
    background: var(--accent);
    color: var(--text-primary);
    box-shadow: var(--shadow-glow);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid rgba(255,255,255,0.3);
}

.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.btn-small {
    padding: 12px 28px;
    font-size: 14px;
}

.btn-block {
    width: 100%;
}

/* ============================================
   Header
   ============================================ */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 14, 23, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 107, 44, 0.1);
    z-index: 1000;
    transition: var(--transition);
}

.header.scrolled {
    background: rgba(5, 8, 16, 0.95);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 7px 36px;
}

.logo {
    display: flex;
    flex-direction: column;
}

.logo h1 {
    font-size: 30px;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: 2px;
}

.logo h1 span {
    color: var(--accent);
}

.logo p {
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: 2px;
    margin-top: 2px;
}

.nav ul {
    display: flex;
    list-style: none;
    gap: 16px;
}

.nav a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 16px;
    padding: 10px 20px;
    border-radius: 8px;
    transition: var(--transition);
    position: relative;
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 20px;
    right: 20px;
    height: 2px;
    background: var(--accent);
    transform: scaleX(0);
    transition: transform 0.3s;
    box-shadow: 0 0 10px var(--accent);
}

.nav a:hover::after,
.nav a.active::after {
    transform: scaleX(1);
}

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

.lang-switch {
    display: inline-flex;
    align-items: center;
    gap: 2px;
    margin-left: auto;
    margin-right: 0;
    margin-top: 40px;
    margin-bottom: 0;
    padding: 3px 12px;
    background: rgba(255, 107, 44, 0.1);
    border: 1px solid rgba(255, 107, 44, 0.2);
    border-radius: 12px;
    font-size: 9px;
    white-space: nowrap;
}

.lang-switch a {
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition);
    padding: 0 3px;
}

.lang-switch a:hover {
    color: var(--text-primary);
}

.lang-switch a.active {
    color: var(--accent);
    font-weight: 600;
}

/* 滑动背景图片动画 */
.header-slide-bg {
    position: absolute;
    top: 10px;
    right: 0;
    width: 1050px;
    height: 75px;
    background: url('../images/lang-switch-bg.png') center center / auto 75px no-repeat;
    opacity: 0.6;
    z-index: -1;
    animation: slideFromRight 3s ease-out forwards;
    background-position-x: right;
}

@keyframes slideFromRight {
    0% {
        transform: translateX(100%);
        opacity: 0;
    }
    50% {
        opacity: 0.7;
    }
    100% {
        transform: translateX(0);
        opacity: 0.6;
    }
}

.mobile-menu-btn {
    display: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-primary);
    padding: 8px;
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    color: var(--text-primary);
    margin-top: 0;
    padding-top: 80px;
    background: var(--gradient-dark);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(255, 107, 44, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(0, 212, 255, 0.08) 0%, transparent 40%);
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 800px;
    height: 800px;
    background: conic-gradient(from 0deg, transparent, var(--accent-glow), transparent, var(--cyan-glow), transparent);
    transform: translate(-50%, -50%);
    opacity: 0.1;
    animation: rotate 30s linear infinite;
    pointer-events: none;
}

@keyframes rotate {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

.hero-particles {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.hero-particles span {
    position: absolute;
    width: 3px;
    height: 3px;
    background: var(--accent);
    border-radius: 50%;
    animation: float-up 15s linear infinite;
    box-shadow: 0 0 10px var(--accent);
}

@keyframes float-up {
    0% { transform: translateY(100vh) scale(0); opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { transform: translateY(-100vh) scale(1); opacity: 0; }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

.hero-badge {
    display: inline-block;
    padding: 10px 24px;
    background: rgba(255, 107, 44, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 50px;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 2px;
    margin-bottom: 24px;
    border: 1px solid rgba(255, 107, 44, 0.3);
    color: var(--accent);
}

.hero h2 {
    font-size: 72px;
    font-weight: 900;
    margin-bottom: 16px;
    line-height: 1.1;
    text-shadow: 0 0 60px rgba(255, 107, 44, 0.3);
}

.hero h3 {
    font-size: 20px;
    font-weight: 400;
    color: var(--text-muted);
    margin-bottom: 16px;
    letter-spacing: 4px;
    text-transform: uppercase;
}

.hero p {
    font-size: 20px;
    margin-bottom: 48px;
    color: var(--text-secondary);
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 80px;
    margin-top: 100px;
    padding-top: 50px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.hero-stat {
    text-align: center;
    position: relative;
}

.hero-stat::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 3px;
    background: var(--accent);
    box-shadow: 0 0 20px var(--accent);
}

.hero-stat-number {
    display: block;
    font-size: 56px;
    font-weight: 900;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.hero-stat-label {
    font-size: 14px;
    color: var(--text-muted);
    margin-top: 8px;
    letter-spacing: 1px;
}

/* ============================================
   About Section
   ============================================ */

.about {
    background: var(--bg-darker);
    position: relative;
}

.about::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

.about-content {
    display: flex;
    flex-direction: column;
    gap: 50px;
    align-items: center;
}

.about-text {
    max-width: 900px;
    text-align: center;
}

.about-text h3 {
    color: var(--accent);
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 24px;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 16px;
    line-height: 1.9;
}

.about-images {
    width: 100%;
    max-width: 900px;
    display: flex;
    flex-direction: column;
    gap: 30px;
    align-items: center;
}

.about-img-products,
.about-img-factory {
    width: 100%;
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.about-img-caption {
    margin-top: -10px;
    color: var(--text-muted);
    font-size: 14px;
    text-align: center;
}

.about-banner {
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.about-banner img {
    width: 100%;
    height: auto;
    display: block;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 60px;
}

.about-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 107, 44, 0.15);
    border-radius: 16px;
    padding: 40px 30px;
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.about-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-accent);
    opacity: 0;
    transition: var(--transition);
}

.about-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent);
    box-shadow: var(--shadow-glow);
}

.about-card:hover::before {
    opacity: 1;
}

.about-card-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.about-card h3 {
    color: var(--text-primary);
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 16px;
}

.about-card p {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.7;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.stat-item {
    text-align: center;
    padding: 40px 24px;
    background: var(--bg-card);
    border-radius: 16px;
    border: 1px solid rgba(255, 107, 44, 0.1);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-accent);
    box-shadow: 0 0 20px var(--accent-glow);
}

.stat-item:hover {
    transform: translateY(-8px);
    border-color: var(--accent);
    box-shadow: var(--shadow-glow);
}

.stat-number {
    display: block;
    font-size: 48px;
    font-weight: 800;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.stat-label {
    color: var(--text-muted);
    font-size: 14px;
    margin-top: 8px;
    font-weight: 500;
}

/* About Story - 公司故事 */
.about-story {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    margin-bottom: 80px;
}

.about-story-content {
    position: relative;
}

.about-story-badge {
    display: inline-block;
    background: var(--gradient-accent);
    color: var(--text-primary);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 2px;
    margin-bottom: 24px;
}

.about-story-content h3 {
    font-size: 36px;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 24px;
    line-height: 1.3;
}

.about-story-content h3::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--gradient-accent);
    margin-top: 16px;
    border-radius: 2px;
}

.about-story-lead {
    font-size: 18px !important;
    color: var(--text-secondary) !important;
    line-height: 1.9 !important;
    margin-bottom: 20px !important;
}

.about-story-content p {
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 16px;
    font-size: 15px;
}

.about-story-content strong {
    color: var(--accent-light);
    font-weight: 600;
}

/* Timeline - 时间线 */
.about-story-visual {
    position: relative;
}

.about-timeline {
    position: relative;
    padding-left: 30px;
}

.about-timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--accent), var(--cyan));
    border-radius: 1px;
}

.timeline-item {
    position: relative;
    padding: 20px 0 20px 30px;
    transition: var(--transition);
}

.timeline-item:hover {
    transform: translateX(10px);
}

.timeline-year {
    position: absolute;
    left: -30px;
    top: 20px;
    font-size: 14px;
    font-weight: 700;
    color: var(--accent);
    width: 60px;
    text-align: right;
}

.timeline-dot {
    position: absolute;
    left: -16px;
    top: 24px;
    width: 12px;
    height: 12px;
    background: var(--bg-dark);
    border: 3px solid var(--accent);
    border-radius: 50%;
    z-index: 1;
    transition: var(--transition);
}

.timeline-item:hover .timeline-dot {
    background: var(--accent);
    box-shadow: 0 0 20px var(--accent-glow);
}

.timeline-text {
    display: block;
    color: var(--text-primary);
    font-size: 15px;
    font-weight: 600;
    line-height: 1.5;
}

.timeline-text br {
    display: block;
    content: '';
    margin-top: 4px;
}

.timeline-text::after {
    content: attr(data-desc);
    display: block;
    color: var(--text-muted);
    font-size: 13px;
    font-weight: 400;
    margin-top: 4px;
}

/* About Stats Bar - 核心数据栏 */
.about-stats-bar {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    background: linear-gradient(135deg, var(--bg-card), var(--bg-darker));
    border: 1px solid rgba(255, 107, 44, 0.15);
    border-radius: 20px;
    padding: 40px 60px;
    margin-bottom: 80px;
    position: relative;
    overflow: hidden;
}

.about-stats-bar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-accent);
}

.about-stats-bar .stat-item {
    text-align: center;
    padding: 0 20px;
    background: transparent;
    border: none;
    position: relative;
}

.about-stats-bar .stat-item::before {
    display: none;
}

.about-stats-bar .stat-item:hover {
    transform: none;
    box-shadow: none;
}

.about-stats-bar .stat-icon {
    font-size: 28px;
    display: block;
    margin-bottom: 8px;
}

.about-stats-bar .stat-number {
    font-size: 42px;
    font-weight: 800;
    display: block;
}

.about-stats-bar .stat-unit {
    font-size: 20px;
    font-weight: 600;
}

.about-stats-bar .stat-label {
    color: var(--text-secondary);
    font-size: 14px;
    margin-top: 4px;
}

.stat-divider {
    width: 1px;
    height: 60px;
    background: linear-gradient(180deg, transparent, var(--accent), transparent);
    opacity: 0.3;
}

/* About Why - 为什么选择我们 */
.about-why {
    text-align: center;
}

.about-subtitle {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 40px;
    position: relative;
    display: inline-block;
}

.about-subtitle::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--gradient-accent);
    border-radius: 2px;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 107, 44, 0.1);
    border-radius: 16px;
    padding: 40px 24px;
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-accent);
    opacity: 0;
    transition: var(--transition);
}

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

.feature-card:hover::before {
    opacity: 1;
}

.feature-icon {
    font-size: 42px;
    margin-bottom: 20px;
    display: block;
}

.feature-card h4 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.7;
}

/* ============================================
   Products Section
   ============================================ */

.products {
    background: var(--bg-dark);
    position: relative;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 32px;
    position: relative;
    z-index: 1;
}

.product-card {
    background: var(--bg-card);
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition);
    position: relative;
}

.product-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 20px;
    padding: 1px;
    background: linear-gradient(135deg, transparent, rgba(255, 107, 44, 0.3), transparent);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.3s;
}

.product-card:hover::before {
    opacity: 1;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-card);
    border-color: rgba(255, 107, 44, 0.2);
}

.product-image {
    height: 260px;
    background: linear-gradient(145deg, #0f1520, #0a0e17);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s;
}

.product-card:hover .product-image img {
    transform: scale(1.1);
}

.product-placeholder {
    color: var(--accent);
    font-size: 64px;
    opacity: 0.2;
    transition: var(--transition);
}

.product-card:hover .product-placeholder {
    transform: scale(1.1);
    opacity: 0.4;
}

.product-info {
    padding: 28px;
}

.product-info h3 {
    color: var(--text-primary);
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
}

.product-info > p {
    color: var(--text-muted);
    font-size: 12px;
    margin-bottom: 16px;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.product-info ul {
    list-style: none;
    margin-bottom: 24px;
}

.product-info li {
    padding: 10px 0;
    color: var(--text-secondary);
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.product-info li:last-child {
    border-bottom: none;
}

.product-info li::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--accent);
    border-radius: 50%;
    flex-shrink: 0;
    box-shadow: 0 0 10px var(--accent);
}

/* ============================================
   Advantages Section
   ============================================ */

.advantages {
    background: var(--bg-darker);
    position: relative;
}

.advantages::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--cyan), transparent);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 32px;
}

.advantage-item {
    text-align: center;
    padding: 48px 24px;
    border-radius: 16px;
    transition: var(--transition);
    position: relative;
    background: transparent;
    border: 1px solid transparent;
}

.advantage-item:hover {
    background: var(--bg-card);
    border-color: rgba(255, 107, 44, 0.1);
    transform: translateY(-5px);
}

.advantage-item i {
    font-size: 48px;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 20px;
    display: block;
    transition: var(--transition);
}

.advantage-item:hover i {
    transform: scale(1.1);
    filter: drop-shadow(0 0 20px var(--accent-glow));
}

.advantage-item h3 {
    margin-bottom: 12px;
    color: var(--text-primary);
    font-size: 18px;
    font-weight: 600;
}

.advantage-item p {
    color: var(--text-muted);
    font-size: 14px;
}

/* ============================================
   Factory Section
   ============================================ */

.factory {
    background: var(--bg-dark);
    position: relative;
}

.factory-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.factory-item {
    border-radius: 20px;
    overflow: hidden;
    position: relative;
    cursor: pointer;
    aspect-ratio: 16/10;
}

.factory-item::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 50%, rgba(0, 0, 0, 0.8));
    opacity: 0;
    transition: opacity 0.3s;
}

.factory-item:hover::after {
    opacity: 1;
}

.factory-item:hover .factory-placeholder span {
    opacity: 1;
    transform: translateY(0);
}

.factory-placeholder {
    width: 100%;
    height: 100%;
    background: var(--bg-card);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    position: relative;
    overflow: hidden;
}

.factory-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s;
}

.factory-item:hover .factory-placeholder img {
    transform: scale(1.1);
}

.factory-placeholder i {
    font-size: 48px;
    margin-bottom: 12px;
    opacity: 0.3;
}

.factory-placeholder span {
    position: absolute;
    bottom: 20px;
    left: 20px;
    right: 20px;
    color: white;
    font-weight: 600;
    font-size: 16px;
    z-index: 2;
    opacity: 0;
    transform: translateY(10px);
    transition: var(--transition);
}

/* ============================================
   Contact Section
   ============================================ */

.contact {
    background: var(--bg-darker);
    position: relative;
}

.contact::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    gap: 20px;
    padding: 24px;
    background: var(--bg-card);
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition);
}

.contact-item:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-glow);
    transform: translateX(5px);
}

.contact-item i {
    font-size: 24px;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-accent);
    color: white;
    border-radius: 12px;
    flex-shrink: 0;
}

.contact-item h4 {
    margin-bottom: 6px;
    color: var(--text-primary);
    font-size: 16px;
}

.contact-item p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
}

.contact-form {
    background: var(--bg-card);
    padding: 48px;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.contact-form h3 {
    margin-bottom: 32px;
    color: var(--text-primary);
    font-size: 28px;
    font-weight: 700;
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 16px 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    font-size: 15px;
    font-family: inherit;
    background: var(--bg-darker);
    color: var(--text-primary);
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 20px var(--accent-glow);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

/* ============================================
   Footer
   ============================================ */

.footer {
    background: var(--bg-darker);
    color: var(--text-primary);
    padding: 80px 0 0;
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
    gap: 48px;
    padding-bottom: 60px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-brand h2 {
    font-size: 36px;
    font-weight: 800;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 12px;
}

.footer-brand p {
    opacity: 0.6;
    font-size: 14px;
    line-height: 1.8;
    max-width: 300px;
}

.footer-social {
    display: flex;
    gap: 12px;
    margin-top: 24px;
}

.footer-social a {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    color: var(--text-secondary);
    font-size: 18px;
    transition: var(--transition);
}

.footer-social a:hover {
    background: var(--accent);
    border-color: var(--accent);
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
}

.footer-links h4,
.footer-products h4,
.footer-contact h4 {
    margin-bottom: 24px;
    color: var(--text-primary);
    font-size: 16px;
    font-weight: 600;
}

.footer-links ul,
.footer-products ul {
    list-style: none;
}

.footer-links li,
.footer-products li {
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-links a:hover {
    color: var(--accent);
    padding-left: 5px;
}

.footer-products li {
    color: var(--text-secondary);
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-products li::before {
    content: '';
    width: 4px;
    height: 4px;
    background: var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--accent);
}

.footer-contact p {
    margin-bottom: 14px;
    font-size: 14px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer-contact i {
    color: var(--accent);
    width: 20px;
}

.footer-bottom {
    text-align: center;
    padding: 30px 0;
    font-size: 14px;
    color: var(--text-muted);
}

/* ============================================
   WhatsApp Float Button
   ============================================ */

.whatsapp-float {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, #25d366, #128c7e);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 32px;
    box-shadow: 0 4px 30px rgba(37, 211, 102, 0.4);
    z-index: 999;
    transition: var(--transition);
    animation: pulse-whatsapp 2s infinite;
}

.whatsapp-float:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 40px rgba(37, 211, 102, 0.6);
}

@keyframes pulse-whatsapp {
    0%, 100% { box-shadow: 0 4px 30px rgba(37, 211, 102, 0.4); }
    50% { box-shadow: 0 4px 40px rgba(37, 211, 102, 0.6), 0 0 0 15px rgba(37, 211, 102, 0.1); }
}

/* ============================================
   Scroll to Top
   ============================================ */

.scroll-top {
    position: fixed;
    bottom: 110px;
    right: 32px;
    width: 48px;
    height: 48px;
    background: var(--bg-card);
    border: 1px solid rgba(255, 107, 44, 0.3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    font-size: 20px;
    z-index: 998;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    cursor: pointer;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    background: var(--accent);
    color: white;
    box-shadow: var(--shadow-glow);
}

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 1024px) {
    .hero h2 {
        font-size: 52px;
    }

    .hero-stats {
        gap: 50px;
    }

    .about-content {
        gap: 40px;
    }

    .about-text {
        padding: 0 20px;
    }

    .about-text h3 {
        font-size: 28px;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }

    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .factory-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .section-title {
        font-size: 40px;
    }
}

@media (max-width: 768px) {
    .nav {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero {
        min-height: auto;
        padding: 120px 0 80px;
    }
    
    .hero h2 {
        font-size: 22px;
        line-height: 1.3;
        padding: 0 5px;
    }
    
    .hero h3 {
        font-size: 12px;
        letter-spacing: 1px;
    }
    
    .hero p {
        font-size: 15px;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 30px;
        margin-top: 60px;
    }
    
    .hero-stat-number {
        font-size: 40px;
    }
    
    .section {
        padding: 80px 0;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* About Story Responsive */
    .about-story {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .about-story-content h3 {
        font-size: 28px;
    }
    
    .about-story-lead {
        font-size: 16px !important;
    }
    
    .timeline-year {
        font-size: 12px;
        width: 50px;
    }
    
    .about-stats-bar {
        flex-wrap: wrap;
        padding: 30px 20px;
        gap: 30px;
    }
    
    .stat-divider {
        display: none;
    }
    
    .about-stats-bar .stat-item {
        flex: 1 1 45%;
        min-width: 120px;
    }
    
    .about-features {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
    
    .feature-card {
        padding: 30px 16px;
    }
    
    .feature-icon {
        font-size: 32px;
    }
    
    .feature-card h4 {
        font-size: 16px;
    }
    
    .stat-number {
        font-size: 36px;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 36px;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .hero .btn {
        width: 100%;
        max-width: 280px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .contact-form {
        padding: 32px;
    }
}

/* ============================================
   Partners Section
   ============================================ */

.partners {
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a1a 100%);
    padding: 80px 0;
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.partner-item {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 107, 44, 0.15);
    border-radius: 12px;
    padding: 24px 16px;
    text-align: center;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.partner-item:hover {
    background: rgba(255, 107, 44, 0.08);
    border-color: var(--accent);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(255, 107, 44, 0.15);
}

.partner-name {
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.partner-tag {
    color: var(--accent);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    opacity: 0.8;
}

@media (max-width: 768px) {
    .partners-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
    
    .partner-item {
        padding: 18px 12px;
    }
    
    .partner-name {
        font-size: 13px;
    }
}

/* Extra Small Screens */
@media (max-width: 480px) {
    .about-features {
        grid-template-columns: 1fr;
    }
    
    .about-stats-bar .stat-item {
        flex: 1 1 100%;
    }
    
    .about-stats-bar .stat-number {
        font-size: 32px;
    }
    
    .about-story-content h3 {
        font-size: 24px;
    }
    
    .about-timeline {
        padding-left: 20px;
    }
    
    .timeline-year {
        position: static;
        display: block;
        text-align: left;
        margin-bottom: 4px;
        width: auto;
    }
    
    .timeline-item {
        padding-left: 20px;
    }
    
    .timeline-dot {
        left: -8px;
    }
}

/* ============================================
   Animations
   ============================================ */

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

.animate-in {
    animation: fadeInUp 0.6s ease-out forwards;
}

/* Glow text effect */
.glow-text {
    text-shadow: 0 0 20px var(--accent-glow);
}