/* ============================================
   PowDrop Co., Ltd. - Website Styles
   Sustainable Energy Solutions
   ============================================ */

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

:root {
    --primary: #00B04F;
    --primary-dark: #008A3D;
    --primary-light: #4CC88A;
    --secondary: #003B73;
    --secondary-dark: #00264A;
    --accent: #FFD700;
    --accent-dark: #E6C200;
    --dark: #0A1929;
    --dark-2: #112D4E;
    --gray: #6B7280;
    --gray-light: #E5E7EB;
    --gray-lighter: #F3F4F6;
    --white: #FFFFFF;
    --gradient-primary: linear-gradient(135deg, #00B04F 0%, #00D957 100%);
    --gradient-dark: linear-gradient(135deg, #0A1929 0%, #112D4E 50%, #003B73 100%);
    --gradient-green: linear-gradient(135deg, #008A3D 0%, #00B04F 50%, #4CC88A 100%);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-md: 0 8px 24px rgba(0,0,0,0.12);
    --shadow-lg: 0 20px 60px rgba(0,0,0,0.15);
    --shadow-green: 0 8px 30px rgba(0,176,79,0.25);
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: var(--dark);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

/* ============ Header ============ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(10, 25, 41, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255,255,255,0.08);
    transition: var(--transition);
}

.header.scrolled {
    background: rgba(255,255,255,0.95);
    box-shadow: var(--shadow-md);
}

.header.scrolled .nav-link {
    color: var(--dark);
}

.header.scrolled .logo-name {
    color: var(--secondary);
}

.header.scrolled .logo-sub {
    color: var(--primary);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 42px;
    height: 42px;
    background: var(--gradient-primary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.3rem;
    box-shadow: var(--shadow-green);
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1;
}

.logo-name {
    font-size: 1.4rem;
    font-weight: 800;
    color: white;
    letter-spacing: -0.5px;
}

.logo-sub {
    font-size: 0.6rem;
    color: var(--primary-light);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-top: 3px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-link {
    color: rgba(255,255,255,0.85);
    font-size: 0.9rem;
    font-weight: 500;
    padding: 8px 14px;
    border-radius: 8px;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    color: var(--primary-light);
    background: rgba(255,255,255,0.05);
}

.nav-link.active {
    color: var(--primary-light);
}

.nav-btn {
    background: var(--gradient-primary);
    color: white !important;
    padding: 8px 22px !important;
    border-radius: 30px;
    font-weight: 600;
    box-shadow: var(--shadow-green);
}

.nav-btn:hover {
    transform: translateY(-2px);
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: white;
    border-radius: 3px;
    transition: var(--transition);
}

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

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 20% 30%, rgba(0,176,79,0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(0,59,115,0.3) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(0,217,87,0.08) 0%, transparent 60%);
    z-index: 1;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    z-index: 1;
}

.hero-bg-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-dark);
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 2;
    padding-top: 80px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(0,176,79,0.15);
    border: 1px solid rgba(0,176,79,0.3);
    color: var(--primary-light);
    padding: 8px 20px;
    border-radius: 30px;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 28px;
    backdrop-filter: blur(10px);
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 900;
    line-height: 1.1;
    color: white;
    margin-bottom: 24px;
    letter-spacing: -2px;
}

.gradient-text {
    background: linear-gradient(135deg, #00B04F, #00D957, #4CC88A);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: rgba(255,255,255,0.7);
    max-width: 700px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

.hero-subtitle strong {
    color: var(--primary-light);
}

.hero-stats {
    display: flex;
    gap: 40px;
    justify-content: center;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary-light);
    line-height: 1;
}

.stat-number span {
    font-size: 1rem;
    font-weight: 500;
    color: rgba(255,255,255,0.5);
}

.stat-label {
    font-size: 0.8rem;
    color: rgba(255,255,255,0.5);
    margin-top: 6px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 30px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-green);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(0,176,79,0.35);
}

.btn-outline {
    background: transparent;
    color: white;
    border: 2px solid rgba(255,255,255,0.2);
}

.btn-outline:hover {
    border-color: var(--primary-light);
    color: var(--primary-light);
    transform: translateY(-3px);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

.scroll-down {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    animation: bounce 2s infinite;
}

.scroll-down a {
    color: rgba(255,255,255,0.4);
    font-size: 1.5rem;
}

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

/* ============ Sections Common ============ */
.section {
    padding: 100px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 12px;
    padding: 6px 18px;
    background: rgba(0,176,79,0.08);
    border-radius: 20px;
}

.section-title {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 800;
    color: var(--secondary);
    line-height: 1.2;
    margin-bottom: 16px;
}

.section-desc {
    font-size: 1.1rem;
    color: var(--gray);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.7;
}

.sub-header {
    margin-top: 80px;
}

/* ============ About Section ============ */
.about-section {
    background: var(--white);
}

.about-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 50px;
}

.feature-card {
    background: var(--gray-lighter);
    border-radius: var(--radius-md);
    padding: 40px 30px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid transparent;
}

.feature-card:hover {
    background: white;
    box-shadow: var(--shadow-lg);
    border-color: rgba(0,176,79,0.1);
    transform: translateY(-5px);
}

.feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    background: var(--gradient-primary);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    box-shadow: var(--shadow-green);
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--gray);
    font-size: 0.95rem;
    line-height: 1.6;
}

.about-banner {
    background: var(--gradient-dark);
    border-radius: var(--radius-lg);
    padding: 40px;
    color: white;
}

.about-banner-content {
    display: flex;
    align-items: center;
    gap: 24px;
}

.about-banner-icon {
    width: 60px;
    height: 60px;
    flex-shrink: 0;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
}

.about-banner h3 {
    font-size: 1.3rem;
    margin-bottom: 8px;
}

.about-banner p {
    color: rgba(255,255,255,0.7);
    font-size: 0.95rem;
}

/* ============ Partner Section ============ */
.partner-section {
    background: var(--gray-lighter);
}

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

.partner-stat-card {
    background: white;
    border-radius: var(--radius-md);
    padding: 36px 24px;
    text-align: center;
    transition: var(--transition);
    border-top: 4px solid var(--primary);
}

.partner-stat-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.partner-stat-number {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--primary);
    margin-bottom: 8px;
}

.partner-stat-label {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--secondary);
    margin-bottom: 6px;
}

.partner-stat-sub {
    font-size: 0.8rem;
    color: var(--gray);
}

/* ============ Solutions / EPC Section ============ */
.solutions-section {
    background: white;
}

.epc-timeline {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    position: relative;
}

.epc-timeline::before {
    content: '';
    position: absolute;
    top: 35px;
    left: 10%;
    right: 10%;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-light), var(--primary), var(--primary-dark));
    z-index: 0;
}

.epc-step {
    position: relative;
    z-index: 1;
    text-align: center;
}

.epc-number {
    width: 70px;
    height: 70px;
    margin: 0 auto 20px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    font-weight: 800;
    box-shadow: var(--shadow-green);
    border: 4px solid white;
}

.epc-content {
    background: var(--gray-lighter);
    border-radius: var(--radius-md);
    padding: 24px;
    text-align: left;
    transition: var(--transition);
}

.epc-content:hover {
    background: white;
    box-shadow: var(--shadow-md);
}

.epc-content h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 12px;
}

.epc-content ul li {
    font-size: 0.85rem;
    color: var(--gray);
    padding: 6px 0 6px 20px;
    position: relative;
    line-height: 1.5;
}

.epc-content ul li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: 700;
}

.connectivity-badge {
    margin-top: 50px;
    background: linear-gradient(135deg, rgba(0,176,79,0.08), rgba(0,59,115,0.08));
    border-radius: var(--radius-md);
    padding: 24px 30px;
    display: flex;
    align-items: center;
    gap: 16px;
    border: 1px solid rgba(0,176,79,0.15);
}

.connectivity-badge i {
    font-size: 1.5rem;
    color: var(--primary);
    flex-shrink: 0;
}

.connectivity-badge span {
    color: var(--secondary);
    font-size: 0.95rem;
}

/* ============ Products Section ============ */
.products-section {
    background: var(--gray-lighter);
}

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

.product-card {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid var(--gray-light);
}

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

.product-card.featured {
    border-color: var(--primary);
    border-width: 2px;
}

.product-card.premium {
    background: var(--dark);
    color: white;
}

.product-card.premium .product-info h3,
.product-card.premium .product-info .product-models {
    color: white;
}

.product-card.premium .product-info .product-desc {
    color: rgba(255,255,255,0.7);
}

.product-card.premium .product-category {
    background: rgba(0,176,79,0.2);
    color: var(--primary-light);
}

.product-image {
    height: 240px;
    background: linear-gradient(135deg, var(--gray-lighter), var(--gray-light));
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.product-card.premium .product-image {
    background: linear-gradient(135deg, var(--dark-2), var(--secondary-dark));
}

.product-tag {
    position: absolute;
    top: 16px;
    right: 16px;
    background: var(--gradient-primary);
    color: white;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 700;
}

.product-mockup {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
}

.product-photo {
    max-height: 210px;
    max-width: 75%;
    width: auto;
    height: auto;
    object-fit: contain;
    filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.18));
    transition: transform 0.35s ease;
}
.product-card:hover .product-photo {
    transform: scale(1.04);
}

/* Charger mockup styles */
.charger-body {
    width: 60px;
    background: linear-gradient(180deg, #2d3748, #1a202c);
    border-radius: 8px 8px 4px 4px;
    position: relative;
    border: 2px solid #4a5568;
}

.charger-body.small { height: 140px; }
.charger-body.medium { height: 180px; width: 70px; }
.charger-body.large { height: 200px; width: 75px; }

.charger-screen {
    position: absolute;
    top: 15px;
    left: 50%;
    transform: translateX(-50%);
    width: 70%;
    height: 30px;
    background: linear-gradient(135deg, #00B04F, #00D957);
    border-radius: 4px;
    box-shadow: 0 0 10px rgba(0,176,79,0.5);
}

.charger-ports {
    position: absolute;
    bottom: 15px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
}

.charger-ports span {
    width: 14px;
    height: 14px;
    background: #4a5568;
    border-radius: 50%;
    border: 2px solid #2d3748;
}

/* Cube mockup */
.cube-body {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, #1a202c, #2d3748);
    border-radius: 12px;
    border: 2px solid #4a5568;
    position: relative;
}

.cube-body.large {
    width: 120px;
    height: 120px;
}

.cube-body::after {
    content: '';
    position: absolute;
    top: 20px;
    left: 20px;
    right: 20px;
    bottom: 20px;
    background: linear-gradient(135deg, rgba(0,176,79,0.2), rgba(0,217,87,0.1));
    border-radius: 8px;
}

/* Dispenser mockup */
.dispenser-body {
    width: 50px;
    height: 160px;
    background: linear-gradient(180deg, #2d3748, #1a202c);
    border-radius: 8px;
    border: 2px solid #4a5568;
    position: relative;
}

.dispenser-body::before {
    content: '';
    position: absolute;
    top: 30px;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 20px;
    background: var(--primary);
    border-radius: 4px;
}

.product-info {
    padding: 24px;
}

.product-info h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 6px;
}

.product-models {
    font-size: 0.8rem;
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 12px;
    font-family: 'Courier New', monospace;
}

.product-desc {
    font-size: 0.9rem;
    color: var(--gray);
    line-height: 1.6;
    margin-bottom: 16px;
}

.product-category {
    display: inline-block;
    background: rgba(0,176,79,0.08);
    color: var(--primary);
    padding: 4px 14px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
}

/* Storage Banner */
.storage-banner {
    background: var(--gradient-dark);
    border-radius: var(--radius-lg);
    padding: 50px;
    color: white;
}

.storage-content {
    display: flex;
    gap: 40px;
    align-items: center;
}

.storage-icon-group {
    display: flex;
    flex-direction: column;
    gap: 20px;
    flex-shrink: 0;
}

.storage-icon-group i {
    width: 60px;
    height: 60px;
    background: rgba(0,176,79,0.15);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--primary-light);
}

.storage-info h3 {
    font-size: 1.4rem;
    margin-bottom: 20px;
    color: var(--primary-light);
}

.storage-specs {
    display: flex;
    gap: 30px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

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

.spec-label {
    font-size: 0.75rem;
    color: rgba(255,255,255,0.5);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.spec-value {
    font-size: 1.3rem;
    font-weight: 700;
    color: white;
}

.storage-desc {
    color: rgba(255,255,255,0.7);
    font-size: 0.9rem;
    line-height: 1.7;
}

/* ============ Scenarios Section ============ */
.scenarios-section {
    background: white;
}

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

.scenario-card {
    background: var(--gray-lighter);
    border-radius: var(--radius-md);
    padding: 36px 24px;
    text-align: center;
    transition: var(--transition);
    border-bottom: 4px solid transparent;
}

.scenario-card:hover {
    background: white;
    box-shadow: var(--shadow-lg);
    border-bottom-color: var(--primary);
    transform: translateY(-5px);
}

.scenario-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 20px;
    background: rgba(0,176,79,0.1);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    color: var(--primary);
}

.scenario-card h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 12px;
}

.scenario-card p {
    font-size: 0.85rem;
    color: var(--gray);
    line-height: 1.6;
}

/* ============ Software Section ============ */
.software-section {
    background: var(--gray-lighter);
}

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

.software-card {
    background: white;
    border-radius: var(--radius-md);
    padding: 36px 30px;
    transition: var(--transition);
}

.software-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.software-icon {
    width: 56px;
    height: 56px;
    background: var(--gradient-primary);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    color: white;
    margin-bottom: 20px;
}

.software-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 16px;
}

.software-card ul li {
    font-size: 0.9rem;
    color: var(--gray);
    padding: 8px 0 8px 24px;
    position: relative;
    line-height: 1.5;
}

.software-card ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: 700;
}

/* ============ Service Section ============ */
.service-section {
    background: white;
}

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

.service-card {
    background: var(--gradient-dark);
    border-radius: var(--radius-md);
    padding: 36px 30px;
    color: white;
    transition: var(--transition);
}

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

.service-icon {
    width: 56px;
    height: 56px;
    background: rgba(0,176,79,0.15);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    color: var(--primary-light);
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.service-card ul li {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.7);
    padding: 8px 0 8px 24px;
    position: relative;
    line-height: 1.5;
}

.service-card ul li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary-light);
    font-weight: 700;
}

/* ============ Advantage Section ============ */
.advantage-section {
    background: var(--gray-lighter);
}

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

.advantage-card {
    background: white;
    border-radius: var(--radius-md);
    padding: 36px 24px;
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.advantage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
}

.advantage-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.advantage-number {
    font-size: 2.5rem;
    font-weight: 900;
    color: rgba(0,176,79,0.15);
    margin-bottom: 12px;
}

.advantage-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 12px;
}

.advantage-card p {
    font-size: 0.85rem;
    color: var(--gray);
    line-height: 1.6;
}

/* ============ Contact Section ============ */
.contact-section {
    background: white;
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.contact-info .section-tag {
    margin-bottom: 16px;
}

.contact-info .section-title {
    text-align: left;
}

.contact-desc {
    color: var(--gray);
    font-size: 1rem;
    margin-bottom: 30px;
    line-height: 1.7;
}

.contact-detail {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
}

.contact-item i {
    width: 48px;
    height: 48px;
    background: rgba(0,176,79,0.08);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 1.1rem;
    flex-shrink: 0;
}

.contact-label {
    display: block;
    font-size: 0.75rem;
    color: var(--gray);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 2px;
}

.contact-value {
    display: block;
    font-size: 1rem;
    font-weight: 600;
    color: var(--secondary);
}

.contact-form-wrapper {
    background: var(--gray-lighter);
    border-radius: var(--radius-lg);
    padding: 40px;
}

.contact-form h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 18px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid var(--gray-light);
    border-radius: 12px;
    font-size: 0.95rem;
    font-family: inherit;
    transition: var(--transition);
    background: white;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0,176,79,0.1);
}

.form-group textarea {
    resize: vertical;
}

/* ============ Footer ============ */
.footer {
    background: var(--dark);
    color: rgba(255,255,255,0.6);
    padding: 60px 0 0;
}

.footer-top {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 60px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-brand .logo {
    margin-bottom: 20px;
}

.footer-brand p {
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.footer-badge {
    color: var(--primary-light) !important;
    font-weight: 600 !important;
    font-size: 0.85rem !important;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.footer-col h4 {
    color: white;
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.footer-col a {
    display: block;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.5);
    padding: 6px 0;
    transition: var(--transition);
}

.footer-col a:hover {
    color: var(--primary-light);
    padding-left: 5px;
}

.footer-bottom {
    padding: 24px 0;
    text-align: center;
    font-size: 0.8rem;
    color: rgba(255,255,255,0.4);
}

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

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ============ Responsive ============ */
@media (max-width: 992px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        right: -100%;
        flex-direction: column;
        background: rgba(10,25,41,0.98);
        backdrop-filter: blur(20px);
        width: 280px;
        padding: 30px;
        gap: 8px;
        border-radius: 0 0 0 20px;
        transition: right 0.3s ease;
        height: calc(100vh - 70px);
        overflow-y: auto;
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-link {
        color: rgba(255,255,255,0.85);
        font-size: 1rem;
        padding: 12px 20px;
        width: 100%;
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }

    .hero-stats {
        gap: 24px;
    }

    .stat-number {
        font-size: 2rem;
    }

    .about-features,
    .product-grid,
    .software-grid,
    .service-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .partner-stats,
    .scenario-grid,
    .advantage-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .epc-timeline {
        grid-template-columns: repeat(2, 1fr);
    }

    .epc-timeline::before {
        display: none;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
    }

    .storage-content {
        flex-direction: column;
    }

    .footer-top {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .section {
        padding: 60px 0;
    }

    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }

    .about-features,
    .product-grid,
    .software-grid,
    .service-grid,
    .partner-stats,
    .scenario-grid,
    .advantage-grid,
    .epc-timeline {
        grid-template-columns: 1fr;
    }

    .hero-cta {
        flex-direction: column;
        width: 100%;
    }

    .hero-cta .btn {
        width: 100%;
        justify-content: center;
    }

    .about-banner-content {
        flex-direction: column;
        text-align: center;
    }

    .storage-specs {
        flex-direction: column;
        gap: 16px;
    }

    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }

    .contact-form-wrapper {
        padding: 24px;
    }
}